diff options
Diffstat (limited to 'drivers/soc')
57 files changed, 6239 insertions, 488 deletions
diff --git a/drivers/soc/actions/owl-sps-helper.c b/drivers/soc/actions/owl-sps-helper.c index 291a206d6f04..e3f36603dd53 100644 --- a/drivers/soc/actions/owl-sps-helper.c +++ b/drivers/soc/actions/owl-sps-helper.c @@ -10,6 +10,7 @@ #include <linux/delay.h> #include <linux/io.h> +#include <linux/soc/actions/owl-sps.h> #define OWL_SPS_PG_CTL 0x0 diff --git a/drivers/soc/amlogic/meson-ee-pwrc.c b/drivers/soc/amlogic/meson-ee-pwrc.c index 43665b77aa9e..5164a4dc2352 100644 --- a/drivers/soc/amlogic/meson-ee-pwrc.c +++ b/drivers/soc/amlogic/meson-ee-pwrc.c @@ -15,6 +15,7 @@ #include <linux/reset.h> #include <linux/clk.h> #include <dt-bindings/power/meson8-power.h> +#include <dt-bindings/power/meson-axg-power.h> #include <dt-bindings/power/meson-g12a-power.h> #include <dt-bindings/power/meson-gxbb-power.h> #include <dt-bindings/power/meson-sm1-power.h> @@ -134,6 +135,11 @@ static struct meson_ee_pwrc_top_domain sm1_pwrc_ge2d = SM1_EE_PD(19); { __reg, BIT(14) }, \ { __reg, BIT(15) } +static struct meson_ee_pwrc_mem_domain axg_pwrc_mem_vpu[] = { + VPU_MEMPD(HHI_VPU_MEM_PD_REG0), + VPU_HHI_MEMPD(HHI_MEM_PD_REG0), +}; + static struct meson_ee_pwrc_mem_domain g12a_pwrc_mem_vpu[] = { VPU_MEMPD(HHI_VPU_MEM_PD_REG0), VPU_MEMPD(HHI_VPU_MEM_PD_REG1), @@ -190,6 +196,10 @@ static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_ge2d[] = { { HHI_MEM_PD_REG0, GENMASK(25, 18) }, }; +static struct meson_ee_pwrc_mem_domain axg_pwrc_mem_audio[] = { + { HHI_MEM_PD_REG0, GENMASK(5, 4) }, +}; + static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_audio[] = { { HHI_MEM_PD_REG0, GENMASK(5, 4) }, { HHI_AUDIO_MEM_PD_REG0, GENMASK(1, 0) }, @@ -231,6 +241,13 @@ static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_audio[] = { static bool pwrc_ee_get_power(struct meson_ee_pwrc_domain *pwrc_domain); +static struct meson_ee_pwrc_domain_desc axg_pwrc_domains[] = { + [PWRC_AXG_VPU_ID] = VPU_PD("VPU", &gx_pwrc_vpu, axg_pwrc_mem_vpu, + pwrc_ee_get_power, 5, 2), + [PWRC_AXG_ETHERNET_MEM_ID] = MEM_PD("ETH", meson_pwrc_mem_eth), + [PWRC_AXG_AUDIO_ID] = MEM_PD("AUDIO", axg_pwrc_mem_audio), +}; + static struct meson_ee_pwrc_domain_desc g12a_pwrc_domains[] = { [PWRC_G12A_VPU_ID] = VPU_PD("VPU", &gx_pwrc_vpu, g12a_pwrc_mem_vpu, pwrc_ee_get_power, 11, 2), @@ -433,8 +450,8 @@ static int meson_ee_pwrc_init_domain(struct platform_device *pdev, if (ret) return ret; - ret = pm_genpd_init(&dom->base, &pm_domain_always_on_gov, - false); + dom->base.flags = GENPD_FLAG_ALWAYS_ON; + ret = pm_genpd_init(&dom->base, NULL, false); if (ret) return ret; } else { @@ -529,6 +546,11 @@ static struct meson_ee_pwrc_domain_data meson_ee_g12a_pwrc_data = { .domains = g12a_pwrc_domains, }; +static struct meson_ee_pwrc_domain_data meson_ee_axg_pwrc_data = { + .count = ARRAY_SIZE(axg_pwrc_domains), + .domains = axg_pwrc_domains, +}; + static struct meson_ee_pwrc_domain_data meson_ee_gxbb_pwrc_data = { .count = ARRAY_SIZE(gxbb_pwrc_domains), .domains = gxbb_pwrc_domains, @@ -563,6 +585,10 @@ static const struct of_device_id meson_ee_pwrc_match_table[] = { .data = &meson_ee_m8b_pwrc_data, }, { + .compatible = "amlogic,meson-axg-pwrc", + .data = &meson_ee_axg_pwrc_data, + }, + { .compatible = "amlogic,meson-gxbb-pwrc", .data = &meson_ee_gxbb_pwrc_data, }, diff --git a/drivers/soc/amlogic/meson-gx-pwrc-vpu.c b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c index 511b6856225d..21b4bc811c00 100644 --- a/drivers/soc/amlogic/meson-gx-pwrc-vpu.c +++ b/drivers/soc/amlogic/meson-gx-pwrc-vpu.c @@ -339,8 +339,8 @@ static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev) return ret; } - pm_genpd_init(&vpu_pd->genpd, &pm_domain_always_on_gov, - powered_off); + vpu_pd->genpd.flags = GENPD_FLAG_ALWAYS_ON; + pm_genpd_init(&vpu_pd->genpd, NULL, powered_off); return of_genpd_add_provider_simple(pdev->dev.of_node, &vpu_pd->genpd); diff --git a/drivers/soc/bcm/Kconfig b/drivers/soc/bcm/Kconfig index 648e32693b7e..24f92a6e882a 100644 --- a/drivers/soc/bcm/Kconfig +++ b/drivers/soc/bcm/Kconfig @@ -22,6 +22,15 @@ config RASPBERRYPI_POWER This enables support for the RPi power domains which can be enabled or disabled via the RPi firmware. +config SOC_BCM63XX + bool "Broadcom 63xx SoC drivers" + depends on BMIPS_GENERIC || COMPILE_TEST + help + Enables drivers for the Broadcom 63xx series of chips. + Drivers can be enabled individually within this menu. + + If unsure, say N. + config SOC_BRCMSTB bool "Broadcom STB SoC drivers" depends on ARM || ARM64 || BMIPS_GENERIC || COMPILE_TEST @@ -33,6 +42,7 @@ config SOC_BRCMSTB If unsure, say N. +source "drivers/soc/bcm/bcm63xx/Kconfig" source "drivers/soc/bcm/brcmstb/Kconfig" endmenu diff --git a/drivers/soc/bcm/Makefile b/drivers/soc/bcm/Makefile index d92268a829a9..7bc90e0bd773 100644 --- a/drivers/soc/bcm/Makefile +++ b/drivers/soc/bcm/Makefile @@ -1,4 +1,5 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_BCM2835_POWER) += bcm2835-power.o obj-$(CONFIG_RASPBERRYPI_POWER) += raspberrypi-power.o +obj-$(CONFIG_SOC_BCM63XX) += bcm63xx/ obj-$(CONFIG_SOC_BRCMSTB) += brcmstb/ diff --git a/drivers/soc/bcm/bcm63xx/Kconfig b/drivers/soc/bcm/bcm63xx/Kconfig new file mode 100644 index 000000000000..16f648a6c70a --- /dev/null +++ b/drivers/soc/bcm/bcm63xx/Kconfig @@ -0,0 +1,12 @@ +# SPDX-License-Identifier: GPL-2.0-only +if SOC_BCM63XX + +config BCM63XX_POWER + bool "BCM63xx power domain driver" + depends on BMIPS_GENERIC || (COMPILE_TEST && OF) + select PM_GENERIC_DOMAINS if PM + help + This enables support for the BCM63xx power domains controller on + BCM6318, BCM6328, BCM6362 and BCM63268 SoCs. + +endif # SOC_BCM63XX diff --git a/drivers/soc/bcm/bcm63xx/Makefile b/drivers/soc/bcm/bcm63xx/Makefile new file mode 100644 index 000000000000..0710d5e018cc --- /dev/null +++ b/drivers/soc/bcm/bcm63xx/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_BCM63XX_POWER) += bcm63xx-power.o diff --git a/drivers/soc/bcm/bcm63xx/bcm63xx-power.c b/drivers/soc/bcm/bcm63xx/bcm63xx-power.c new file mode 100644 index 000000000000..515fe182dc34 --- /dev/null +++ b/drivers/soc/bcm/bcm63xx/bcm63xx-power.c @@ -0,0 +1,378 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * BCM63xx Power Domain Controller Driver + * + * Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com> + */ + +#include <dt-bindings/soc/bcm6318-pm.h> +#include <dt-bindings/soc/bcm6328-pm.h> +#include <dt-bindings/soc/bcm6362-pm.h> +#include <dt-bindings/soc/bcm63268-pm.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/of.h> +#include <linux/of_device.h> + +struct bcm63xx_power_dev { + struct generic_pm_domain genpd; + struct bcm63xx_power *power; + uint32_t mask; +}; + +struct bcm63xx_power { + void __iomem *base; + spinlock_t lock; + struct bcm63xx_power_dev *dev; + struct genpd_onecell_data genpd_data; + struct generic_pm_domain **genpd; +}; + +struct bcm63xx_power_data { + const char * const name; + uint8_t bit; + unsigned int flags; +}; + +static int bcm63xx_power_get_state(struct bcm63xx_power_dev *pmd, bool *is_on) +{ + struct bcm63xx_power *power = pmd->power; + + if (!pmd->mask) { + *is_on = false; + return -EINVAL; + } + + *is_on = !(__raw_readl(power->base) & pmd->mask); + + return 0; +} + +static int bcm63xx_power_set_state(struct bcm63xx_power_dev *pmd, bool on) +{ + struct bcm63xx_power *power = pmd->power; + unsigned long flags; + uint32_t val; + + if (!pmd->mask) + return -EINVAL; + + spin_lock_irqsave(&power->lock, flags); + val = __raw_readl(power->base); + if (on) + val &= ~pmd->mask; + else + val |= pmd->mask; + __raw_writel(val, power->base); + spin_unlock_irqrestore(&power->lock, flags); + + return 0; +} + +static int bcm63xx_power_on(struct generic_pm_domain *genpd) +{ + struct bcm63xx_power_dev *pmd = container_of(genpd, + struct bcm63xx_power_dev, genpd); + + return bcm63xx_power_set_state(pmd, true); +} + +static int bcm63xx_power_off(struct generic_pm_domain *genpd) +{ + struct bcm63xx_power_dev *pmd = container_of(genpd, + struct bcm63xx_power_dev, genpd); + + return bcm63xx_power_set_state(pmd, false); +} + +static int bcm63xx_power_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct resource *res; + const struct bcm63xx_power_data *entry, *table; + struct bcm63xx_power *power; + unsigned int ndom; + uint8_t max_bit = 0; + int ret; + + power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL); + if (!power) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + power->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(power->base)) + return PTR_ERR(power->base); + + table = of_device_get_match_data(dev); + if (!table) + return -EINVAL; + + power->genpd_data.num_domains = 0; + ndom = 0; + for (entry = table; entry->name; entry++) { + max_bit = max(max_bit, entry->bit); + ndom++; + } + + if (!ndom) + return -ENODEV; + + power->genpd_data.num_domains = max_bit + 1; + + power->dev = devm_kcalloc(dev, power->genpd_data.num_domains, + sizeof(struct bcm63xx_power_dev), + GFP_KERNEL); + if (!power->dev) + return -ENOMEM; + + power->genpd = devm_kcalloc(dev, power->genpd_data.num_domains, + sizeof(struct generic_pm_domain *), + GFP_KERNEL); + if (!power->genpd) + return -ENOMEM; + + power->genpd_data.domains = power->genpd; + + ndom = 0; + for (entry = table; entry->name; entry++) { + struct bcm63xx_power_dev *pmd = &power->dev[ndom]; + bool is_on; + + pmd->power = power; + pmd->mask = BIT(entry->bit); + pmd->genpd.name = entry->name; + pmd->genpd.flags = entry->flags; + + ret = bcm63xx_power_get_state(pmd, &is_on); + if (ret) + dev_warn(dev, "unable to get current state for %s\n", + pmd->genpd.name); + + pmd->genpd.power_on = bcm63xx_power_on; + pmd->genpd.power_off = bcm63xx_power_off; + + pm_genpd_init(&pmd->genpd, NULL, !is_on); + power->genpd[entry->bit] = &pmd->genpd; + + ndom++; + } + + spin_lock_init(&power->lock); + + ret = of_genpd_add_provider_onecell(np, &power->genpd_data); + if (ret) { + dev_err(dev, "failed to register genpd driver: %d\n", ret); + return ret; + } + + dev_info(dev, "registered %u power domains\n", ndom); + + return 0; +} + +static const struct bcm63xx_power_data bcm6318_power_domains[] = { + { + .name = "pcie", + .bit = BCM6318_POWER_DOMAIN_PCIE, + }, { + .name = "usb", + .bit = BCM6318_POWER_DOMAIN_USB, + }, { + .name = "ephy0", + .bit = BCM6318_POWER_DOMAIN_EPHY0, + }, { + .name = "ephy1", + .bit = BCM6318_POWER_DOMAIN_EPHY1, + }, { + .name = "ephy2", + .bit = BCM6318_POWER_DOMAIN_EPHY2, + }, { + .name = "ephy3", + .bit = BCM6318_POWER_DOMAIN_EPHY3, + }, { + .name = "ldo2p5", + .bit = BCM6318_POWER_DOMAIN_LDO2P5, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "ldo2p9", + .bit = BCM6318_POWER_DOMAIN_LDO2P9, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "sw1p0", + .bit = BCM6318_POWER_DOMAIN_SW1P0, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "pad", + .bit = BCM6318_POWER_DOMAIN_PAD, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm6328_power_domains[] = { + { + .name = "adsl2-mips", + .bit = BCM6328_POWER_DOMAIN_ADSL2_MIPS, + }, { + .name = "adsl2-phy", + .bit = BCM6328_POWER_DOMAIN_ADSL2_PHY, + }, { + .name = "adsl2-afe", + .bit = BCM6328_POWER_DOMAIN_ADSL2_AFE, + }, { + .name = "sar", + .bit = BCM6328_POWER_DOMAIN_SAR, + }, { + .name = "pcm", + .bit = BCM6328_POWER_DOMAIN_PCM, + }, { + .name = "usbd", + .bit = BCM6328_POWER_DOMAIN_USBD, + }, { + .name = "usbh", + .bit = BCM6328_POWER_DOMAIN_USBH, + }, { + .name = "pcie", + .bit = BCM6328_POWER_DOMAIN_PCIE, + }, { + .name = "robosw", + .bit = BCM6328_POWER_DOMAIN_ROBOSW, + }, { + .name = "ephy", + .bit = BCM6328_POWER_DOMAIN_EPHY, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm6362_power_domains[] = { + { + .name = "sar", + .bit = BCM6362_POWER_DOMAIN_SAR, + }, { + .name = "ipsec", + .bit = BCM6362_POWER_DOMAIN_IPSEC, + }, { + .name = "mips", + .bit = BCM6362_POWER_DOMAIN_MIPS, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "dect", + .bit = BCM6362_POWER_DOMAIN_DECT, + }, { + .name = "usbh", + .bit = BCM6362_POWER_DOMAIN_USBH, + }, { + .name = "usbd", + .bit = BCM6362_POWER_DOMAIN_USBD, + }, { + .name = "robosw", + .bit = BCM6362_POWER_DOMAIN_ROBOSW, + }, { + .name = "pcm", + .bit = BCM6362_POWER_DOMAIN_PCM, + }, { + .name = "periph", + .bit = BCM6362_POWER_DOMAIN_PERIPH, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "adsl-phy", + .bit = BCM6362_POWER_DOMAIN_ADSL_PHY, + }, { + .name = "gmii-pads", + .bit = BCM6362_POWER_DOMAIN_GMII_PADS, + }, { + .name = "fap", + .bit = BCM6362_POWER_DOMAIN_FAP, + }, { + .name = "pcie", + .bit = BCM6362_POWER_DOMAIN_PCIE, + }, { + .name = "wlan-pads", + .bit = BCM6362_POWER_DOMAIN_WLAN_PADS, + }, { + /* sentinel */ + }, +}; + +static const struct bcm63xx_power_data bcm63268_power_domains[] = { + { + .name = "sar", + .bit = BCM63268_POWER_DOMAIN_SAR, + }, { + .name = "ipsec", + .bit = BCM63268_POWER_DOMAIN_IPSEC, + }, { + .name = "mips", + .bit = BCM63268_POWER_DOMAIN_MIPS, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "dect", + .bit = BCM63268_POWER_DOMAIN_DECT, + }, { + .name = "usbh", + .bit = BCM63268_POWER_DOMAIN_USBH, + }, { + .name = "usbd", + .bit = BCM63268_POWER_DOMAIN_USBD, + }, { + .name = "robosw", + .bit = BCM63268_POWER_DOMAIN_ROBOSW, + }, { + .name = "pcm", + .bit = BCM63268_POWER_DOMAIN_PCM, + }, { + .name = "periph", + .bit = BCM63268_POWER_DOMAIN_PERIPH, + .flags = GENPD_FLAG_ALWAYS_ON, + }, { + .name = "vdsl-phy", + .bit = BCM63268_POWER_DOMAIN_VDSL_PHY, + }, { + .name = "vdsl-mips", + .bit = BCM63268_POWER_DOMAIN_VDSL_MIPS, + }, { + .name = "fap", + .bit = BCM63268_POWER_DOMAIN_FAP, + }, { + .name = "pcie", + .bit = BCM63268_POWER_DOMAIN_PCIE, + }, { + .name = "wlan-pads", + .bit = BCM63268_POWER_DOMAIN_WLAN_PADS, + }, { + /* sentinel */ + }, +}; + +static const struct of_device_id bcm63xx_power_of_match[] = { + { + .compatible = "brcm,bcm6318-power-controller", + .data = &bcm6318_power_domains, + }, { + .compatible = "brcm,bcm6328-power-controller", + .data = &bcm6328_power_domains, + }, { + .compatible = "brcm,bcm6362-power-controller", + .data = &bcm6362_power_domains, + }, { + .compatible = "brcm,bcm63268-power-controller", + .data = &bcm63268_power_domains, + }, { + /* sentinel */ + } +}; + +static struct platform_driver bcm63xx_power_driver = { + .driver = { + .name = "bcm63xx-power-controller", + .of_match_table = bcm63xx_power_of_match, + }, + .probe = bcm63xx_power_probe, +}; +builtin_platform_driver(bcm63xx_power_driver); diff --git a/drivers/soc/bcm/brcmstb/biuctrl.c b/drivers/soc/bcm/brcmstb/biuctrl.c index 61731e01f94b..7f8dc302ae6e 100644 --- a/drivers/soc/bcm/brcmstb/biuctrl.c +++ b/drivers/soc/bcm/brcmstb/biuctrl.c @@ -13,6 +13,22 @@ #include <linux/syscore_ops.h> #include <linux/soc/brcmstb/brcmstb.h> +#define RACENPREF_MASK 0x3 +#define RACPREFINST_SHIFT 0 +#define RACENINST_SHIFT 2 +#define RACPREFDATA_SHIFT 4 +#define RACENDATA_SHIFT 6 +#define RAC_CPU_SHIFT 8 +#define RACCFG_MASK 0xff +#define DPREF_LINE_2_SHIFT 24 +#define DPREF_LINE_2_MASK 0xff + +/* Bitmask to enable instruction and data prefetching with a 256-bytes stride */ +#define RAC_DATA_INST_EN_MASK (1 << RACPREFINST_SHIFT | \ + RACENPREF_MASK << RACENINST_SHIFT | \ + 1 << RACPREFDATA_SHIFT | \ + RACENPREF_MASK << RACENDATA_SHIFT) + #define CPU_CREDIT_REG_MCPx_WR_PAIRING_EN_MASK 0x70000000 #define CPU_CREDIT_REG_MCPx_READ_CRED_MASK 0xf #define CPU_CREDIT_REG_MCPx_WRITE_CRED_MASK 0xf @@ -31,11 +47,21 @@ static void __iomem *cpubiuctrl_base; static bool mcp_wr_pairing_en; static const int *cpubiuctrl_regs; +enum cpubiuctrl_regs { + CPU_CREDIT_REG = 0, + CPU_MCP_FLOW_REG, + CPU_WRITEBACK_CTRL_REG, + RAC_CONFIG0_REG, + RAC_CONFIG1_REG, + NUM_CPU_BIUCTRL_REGS, +}; + static inline u32 cbc_readl(int reg) { int offset = cpubiuctrl_regs[reg]; - if (offset == -1) + if (offset == -1 || + (IS_ENABLED(CONFIG_CACHE_B15_RAC) && reg >= RAC_CONFIG0_REG)) return (u32)-1; return readl_relaxed(cpubiuctrl_base + offset); @@ -45,22 +71,19 @@ static inline void cbc_writel(u32 val, int reg) { int offset = cpubiuctrl_regs[reg]; - if (offset == -1) + if (offset == -1 || + (IS_ENABLED(CONFIG_CACHE_B15_RAC) && reg >= RAC_CONFIG0_REG)) return; writel(val, cpubiuctrl_base + offset); } -enum cpubiuctrl_regs { - CPU_CREDIT_REG = 0, - CPU_MCP_FLOW_REG, - CPU_WRITEBACK_CTRL_REG -}; - static const int b15_cpubiuctrl_regs[] = { [CPU_CREDIT_REG] = 0x184, [CPU_MCP_FLOW_REG] = -1, [CPU_WRITEBACK_CTRL_REG] = -1, + [RAC_CONFIG0_REG] = -1, + [RAC_CONFIG1_REG] = -1, }; /* Odd cases, e.g: 7260A0 */ @@ -68,22 +91,26 @@ static const int b53_cpubiuctrl_no_wb_regs[] = { [CPU_CREDIT_REG] = 0x0b0, [CPU_MCP_FLOW_REG] = 0x0b4, [CPU_WRITEBACK_CTRL_REG] = -1, + [RAC_CONFIG0_REG] = 0x78, + [RAC_CONFIG1_REG] = 0x7c, }; static const int b53_cpubiuctrl_regs[] = { [CPU_CREDIT_REG] = 0x0b0, [CPU_MCP_FLOW_REG] = 0x0b4, [CPU_WRITEBACK_CTRL_REG] = 0x22c, + [RAC_CONFIG0_REG] = 0x78, + [RAC_CONFIG1_REG] = 0x7c, }; static const int a72_cpubiuctrl_regs[] = { [CPU_CREDIT_REG] = 0x18, [CPU_MCP_FLOW_REG] = 0x1c, [CPU_WRITEBACK_CTRL_REG] = 0x20, + [RAC_CONFIG0_REG] = 0x08, + [RAC_CONFIG1_REG] = 0x0c, }; -#define NUM_CPU_BIUCTRL_REGS 3 - static int __init mcp_write_pairing_set(void) { u32 creds = 0; @@ -110,6 +137,8 @@ static int __init mcp_write_pairing_set(void) static const u32 a72_b53_mach_compat[] = { 0x7211, 0x7216, + 0x72164, + 0x72165, 0x7255, 0x7260, 0x7268, @@ -117,6 +146,61 @@ static const u32 a72_b53_mach_compat[] = { 0x7278, }; +/* The read-ahead cache present in the Brahma-B53 CPU is a special piece of + * hardware after the integrated L2 cache of the B53 CPU complex whose purpose + * is to prefetch instruction and/or data with a line size of either 64 bytes + * or 256 bytes. The rationale is that the data-bus of the CPU interface is + * optimized for 256-byte transactions, and enabling the read-ahead cache + * provides a significant performance boost (typically twice the performance + * for a memcpy benchmark application). + * + * The read-ahead cache is transparent for Virtual Address cache maintenance + * operations: IC IVAU, DC IVAC, DC CVAC, DC CVAU and DC CIVAC. So no special + * handling is needed for the DMA API above and beyond what is included in the + * arm64 implementation. + * + * In addition, since the Point of Unification is typically between L1 and L2 + * for the Brahma-B53 processor no special read-ahead cache handling is needed + * for the IC IALLU and IC IALLUIS cache maintenance operations. + * + * However, it is not possible to specify the cache level (L3) for the cache + * maintenance instructions operating by set/way to operate on the read-ahead + * cache. The read-ahead cache will maintain coherency when inner cache lines + * are cleaned by set/way, but if it is necessary to invalidate inner cache + * lines by set/way to maintain coherency with system masters operating on + * shared memory that does not have hardware support for coherency, then it + * will also be necessary to explicitly invalidate the read-ahead cache. + */ +static void __init a72_b53_rac_enable_all(struct device_node *np) +{ + unsigned int cpu; + u32 enable = 0, pref_dist, shift; + + if (IS_ENABLED(CONFIG_CACHE_B15_RAC)) + return; + + if (WARN(num_possible_cpus() > 4, "RAC only supports 4 CPUs\n")) + return; + + pref_dist = cbc_readl(RAC_CONFIG1_REG); + for_each_possible_cpu(cpu) { + shift = cpu * RAC_CPU_SHIFT + RACPREFDATA_SHIFT; + enable |= RAC_DATA_INST_EN_MASK << (cpu * RAC_CPU_SHIFT); + if (cpubiuctrl_regs == a72_cpubiuctrl_regs) { + enable &= ~(RACENPREF_MASK << shift); + enable |= 3 << shift; + pref_dist |= 1 << (cpu + DPREF_LINE_2_SHIFT); + } + } + + cbc_writel(enable, RAC_CONFIG0_REG); + cbc_writel(pref_dist, RAC_CONFIG1_REG); + + pr_info("%pOF: Broadcom %s read-ahead cache\n", + np, cpubiuctrl_regs == a72_cpubiuctrl_regs ? + "Cortex-A72" : "Brahma-B53"); +} + static void __init mcp_a72_b53_set(void) { unsigned int i; @@ -262,6 +346,7 @@ static int __init brcmstb_biuctrl_init(void) return ret; } + a72_b53_rac_enable_all(np); mcp_a72_b53_set(); #ifdef CONFIG_PM_SLEEP register_syscore_ops(&brcmstb_cpu_credit_syscore_ops); diff --git a/drivers/soc/fsl/dpio/qbman-portal.c b/drivers/soc/fsl/dpio/qbman-portal.c index 0ab85bfb116f..659b4a570d5b 100644 --- a/drivers/soc/fsl/dpio/qbman-portal.c +++ b/drivers/soc/fsl/dpio/qbman-portal.c @@ -647,7 +647,6 @@ int qbman_swp_enqueue_multiple_direct(struct qbman_swp *s, const uint32_t *cl = (uint32_t *)d; uint32_t eqcr_ci, eqcr_pi, half_mask, full_mask; int i, num_enqueued = 0; - uint64_t addr_cena; spin_lock(&s->access_spinlock); half_mask = (s->eqcr.pi_ci_mask>>1); @@ -701,7 +700,6 @@ int qbman_swp_enqueue_multiple_direct(struct qbman_swp *s, /* Flush all the cacheline without load/store in between */ eqcr_pi = s->eqcr.pi; - addr_cena = (size_t)s->addr_cena; for (i = 0; i < num_enqueued; i++) eqcr_pi++; s->eqcr.pi = eqcr_pi & full_mask; diff --git a/drivers/soc/fsl/qbman/bman.c b/drivers/soc/fsl/qbman/bman.c index f4fb527d8301..c5dd026fe889 100644 --- a/drivers/soc/fsl/qbman/bman.c +++ b/drivers/soc/fsl/qbman/bman.c @@ -660,7 +660,7 @@ int bm_shutdown_pool(u32 bpid) } done: put_affine_portal(); - return 0; + return err; } struct gen_pool *bm_bpalloc; diff --git a/drivers/soc/fsl/qbman/qman_test_api.c b/drivers/soc/fsl/qbman/qman_test_api.c index 2895d062cf51..7066b2f1467c 100644 --- a/drivers/soc/fsl/qbman/qman_test_api.c +++ b/drivers/soc/fsl/qbman/qman_test_api.c @@ -86,7 +86,7 @@ static void fd_inc(struct qm_fd *fd) len--; qm_fd_set_param(fd, fmt, off, len); - fd->cmd = cpu_to_be32(be32_to_cpu(fd->cmd) + 1); + be32_add_cpu(&fd->cmd, 1); } /* The only part of the 'fd' we can't memcmp() is the ppid */ diff --git a/drivers/soc/fsl/qe/ucc.c b/drivers/soc/fsl/qe/ucc.c index cac0fb7693a0..21dbcd787cd5 100644 --- a/drivers/soc/fsl/qe/ucc.c +++ b/drivers/soc/fsl/qe/ucc.c @@ -523,7 +523,7 @@ int ucc_set_tdm_rxtx_clk(u32 tdm_num, enum qe_clock clock, qe_mux_reg = &qe_immr->qmx; - if (tdm_num > 7 || tdm_num < 0) + if (tdm_num > 7) return -EINVAL; /* The communications direction must be RX or TX */ diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index 6cf8a7a412bd..db7e7fc321b1 100644 --- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c @@ -487,22 +487,17 @@ static int imx_pgc_domain_probe(struct platform_device *pdev) domain->regulator = devm_regulator_get_optional(domain->dev, "power"); if (IS_ERR(domain->regulator)) { - if (PTR_ERR(domain->regulator) != -ENODEV) { - if (PTR_ERR(domain->regulator) != -EPROBE_DEFER) - dev_err(domain->dev, "Failed to get domain's regulator\n"); - return PTR_ERR(domain->regulator); - } + if (PTR_ERR(domain->regulator) != -ENODEV) + return dev_err_probe(domain->dev, PTR_ERR(domain->regulator), + "Failed to get domain's regulator\n"); } else if (domain->voltage) { regulator_set_voltage(domain->regulator, domain->voltage, domain->voltage); } ret = imx_pgc_get_clocks(domain); - if (ret) { - if (ret != -EPROBE_DEFER) - dev_err(domain->dev, "Failed to get domain's clocks\n"); - return ret; - } + if (ret) + return dev_err_probe(domain->dev, ret, "Failed to get domain's clocks\n"); ret = pm_genpd_init(&domain->genpd, NULL, true); if (ret) { diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index dc644cfb6419..505651b0d715 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -13,11 +13,16 @@ #define CMDQ_POLL_ENABLE_MASK BIT(0) #define CMDQ_EOC_IRQ_EN BIT(0) #define CMDQ_REG_TYPE 1 +#define CMDQ_JUMP_RELATIVE 1 struct cmdq_instruction { union { u32 value; u32 mask; + struct { + u16 arg_c; + u16 src_reg; + }; }; union { u16 offset; @@ -223,15 +228,104 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, } EXPORT_SYMBOL(cmdq_pkt_write_mask); -int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event) +int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low, + u16 reg_idx) +{ + struct cmdq_instruction inst = {}; + + inst.op = CMDQ_CODE_READ_S; + inst.dst_t = CMDQ_REG_TYPE; + inst.sop = high_addr_reg_idx; + inst.reg_dst = reg_idx; + inst.src_reg = addr_low; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_read_s); + +int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, + u16 addr_low, u16 src_reg_idx) +{ + struct cmdq_instruction inst = {}; + + inst.op = CMDQ_CODE_WRITE_S; + inst.src_t = CMDQ_REG_TYPE; + inst.sop = high_addr_reg_idx; + inst.offset = addr_low; + inst.src_reg = src_reg_idx; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_write_s); + +int cmdq_pkt_write_s_mask(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, + u16 addr_low, u16 src_reg_idx, u32 mask) +{ + struct cmdq_instruction inst = {}; + int err; + + inst.op = CMDQ_CODE_MASK; + inst.mask = ~mask; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + inst.mask = 0; + inst.op = CMDQ_CODE_WRITE_S_MASK; + inst.src_t = CMDQ_REG_TYPE; + inst.sop = high_addr_reg_idx; + inst.offset = addr_low; + inst.src_reg = src_reg_idx; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_write_s_mask); + +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, + u16 addr_low, u32 value) +{ + struct cmdq_instruction inst = {}; + + inst.op = CMDQ_CODE_WRITE_S; + inst.sop = high_addr_reg_idx; + inst.offset = addr_low; + inst.value = value; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_write_s_value); + +int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, + u16 addr_low, u32 value, u32 mask) +{ + struct cmdq_instruction inst = {}; + int err; + + inst.op = CMDQ_CODE_MASK; + inst.mask = ~mask; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + inst.op = CMDQ_CODE_WRITE_S_MASK; + inst.sop = high_addr_reg_idx; + inst.offset = addr_low; + inst.value = value; + + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_write_s_mask_value); + +int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear) { struct cmdq_instruction inst = { {0} }; + u32 clear_option = clear ? CMDQ_WFE_UPDATE : 0; if (event >= CMDQ_MAX_EVENT) return -EINVAL; inst.op = CMDQ_CODE_WFE; - inst.value = CMDQ_WFE_OPTION; + inst.value = CMDQ_WFE_OPTION | clear_option; inst.event = event; return cmdq_pkt_append_command(pkt, inst); @@ -315,6 +409,18 @@ int cmdq_pkt_assign(struct cmdq_pkt *pkt, u16 reg_idx, u32 value) } EXPORT_SYMBOL(cmdq_pkt_assign); +int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr) +{ + struct cmdq_instruction inst = {}; + + inst.op = CMDQ_CODE_JUMP; + inst.offset = CMDQ_JUMP_RELATIVE; + inst.value = addr >> + cmdq_get_shift_pa(((struct cmdq_client *)pkt->cl)->chan); + return cmdq_pkt_append_command(pkt, inst); +} +EXPORT_SYMBOL(cmdq_pkt_jump); + int cmdq_pkt_finalize(struct cmdq_pkt *pkt) { struct cmdq_instruction inst = { {0} }; @@ -329,7 +435,8 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt) /* JUMP to end */ inst.op = CMDQ_CODE_JUMP; - inst.value = CMDQ_JUMP_PASS; + inst.value = CMDQ_JUMP_PASS >> + cmdq_get_shift_pa(((struct cmdq_client *)pkt->cl)->chan); err = cmdq_pkt_append_command(pkt, inst); return err; diff --git a/drivers/soc/mediatek/mtk-infracfg.c b/drivers/soc/mediatek/mtk-infracfg.c index 341c7ac250e3..4a123796aad3 100644 --- a/drivers/soc/mediatek/mtk-infracfg.c +++ b/drivers/soc/mediatek/mtk-infracfg.c @@ -19,7 +19,7 @@ /** * mtk_infracfg_set_bus_protection - enable bus protection - * @regmap: The infracfg regmap + * @infracfg: The infracfg regmap * @mask: The mask containing the protection bits to be enabled. * @reg_update: The boolean flag determines to set the protection bits * by regmap_update_bits with enable register(PROTECTEN) or @@ -50,7 +50,7 @@ int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask, /** * mtk_infracfg_clear_bus_protection - disable bus protection - * @regmap: The infracfg regmap + * @infracfg: The infracfg regmap * @mask: The mask containing the protection bits to be disabled. * @reg_update: The boolean flag determines to clear the protection bits * by regmap_update_bits with enable register(PROTECTEN) or diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index 3dc3e3d61ea3..6a3b69b43ad5 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -26,6 +26,22 @@ config QCOM_COMMAND_DB resource on a RPM-hardened platform must use this database to get SoC specific identifier and information for the shared resources. +config QCOM_CPR + tristate "QCOM Core Power Reduction (CPR) support" + depends on ARCH_QCOM && HAS_IOMEM + select PM_OPP + select REGMAP + help + Say Y here to enable support for the CPR hardware found on Qualcomm + SoCs like QCS404. + + This driver populates CPU OPPs tables and makes adjustments to the + tables based on feedback from the CPR hardware. If you want to do + CPUfrequency scaling say Y here. + + To compile this driver as a module, choose M here: the module will + be called qcom-cpr + config QCOM_GENI_SE tristate "QCOM GENI Serial Engine Driver" depends on ARCH_QCOM || COMPILE_TEST diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 93392d9dc7f7..ad675a6593d0 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -3,6 +3,7 @@ CFLAGS_rpmh-rsc.o := -I$(src) obj-$(CONFIG_QCOM_AOSS_QMP) += qcom_aoss.o obj-$(CONFIG_QCOM_GENI_SE) += qcom-geni-se.o obj-$(CONFIG_QCOM_COMMAND_DB) += cmd-db.o +obj-$(CONFIG_QCOM_CPR) += cpr.o obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o obj-$(CONFIG_QCOM_MDT_LOADER) += mdt_loader.o obj-$(CONFIG_QCOM_OCMEM) += ocmem.o diff --git a/drivers/soc/qcom/apr.c b/drivers/soc/qcom/apr.c index 1f35b097c635..7abfc8c4fdc7 100644 --- a/drivers/soc/qcom/apr.c +++ b/drivers/soc/qcom/apr.c @@ -328,7 +328,7 @@ static int of_apr_add_pd_lookups(struct device *dev) pds = pdr_add_lookup(apr->pdr, service_name, service_path); if (IS_ERR(pds) && PTR_ERR(pds) != -EALREADY) { - dev_err(dev, "pdr add lookup failed: %d\n", ret); + dev_err(dev, "pdr add lookup failed: %ld\n", PTR_ERR(pds)); return PTR_ERR(pds); } } diff --git a/drivers/soc/qcom/cpr.c b/drivers/soc/qcom/cpr.c new file mode 100644 index 000000000000..b24cc77d1889 --- /dev/null +++ b/drivers/soc/qcom/cpr.c @@ -0,0 +1,1788 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved. + * Copyright (c) 2019, Linaro Limited + */ + +#include <linux/module.h> +#include <linux/err.h> +#include <linux/debugfs.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/bitops.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/pm_opp.h> +#include <linux/interrupt.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/regulator/consumer.h> +#include <linux/clk.h> +#include <linux/nvmem-consumer.h> + +/* Register Offsets for RB-CPR and Bit Definitions */ + +/* RBCPR Version Register */ +#define REG_RBCPR_VERSION 0 +#define RBCPR_VER_2 0x02 +#define FLAGS_IGNORE_1ST_IRQ_STATUS BIT(0) + +/* RBCPR Gate Count and Target Registers */ +#define REG_RBCPR_GCNT_TARGET(n) (0x60 + 4 * (n)) + +#define RBCPR_GCNT_TARGET_TARGET_SHIFT 0 +#define RBCPR_GCNT_TARGET_TARGET_MASK GENMASK(11, 0) +#define RBCPR_GCNT_TARGET_GCNT_SHIFT 12 +#define RBCPR_GCNT_TARGET_GCNT_MASK GENMASK(9, 0) + +/* RBCPR Timer Control */ +#define REG_RBCPR_TIMER_INTERVAL 0x44 +#define REG_RBIF_TIMER_ADJUST 0x4c + +#define RBIF_TIMER_ADJ_CONS_UP_MASK GENMASK(3, 0) +#define RBIF_TIMER_ADJ_CONS_UP_SHIFT 0 +#define RBIF_TIMER_ADJ_CONS_DOWN_MASK GENMASK(3, 0) +#define RBIF_TIMER_ADJ_CONS_DOWN_SHIFT 4 +#define RBIF_TIMER_ADJ_CLAMP_INT_MASK GENMASK(7, 0) +#define RBIF_TIMER_ADJ_CLAMP_INT_SHIFT 8 + +/* RBCPR Config Register */ +#define REG_RBIF_LIMIT 0x48 +#define RBIF_LIMIT_CEILING_MASK GENMASK(5, 0) +#define RBIF_LIMIT_CEILING_SHIFT 6 +#define RBIF_LIMIT_FLOOR_BITS 6 +#define RBIF_LIMIT_FLOOR_MASK GENMASK(5, 0) + +#define RBIF_LIMIT_CEILING_DEFAULT RBIF_LIMIT_CEILING_MASK +#define RBIF_LIMIT_FLOOR_DEFAULT 0 + +#define REG_RBIF_SW_VLEVEL 0x94 +#define RBIF_SW_VLEVEL_DEFAULT 0x20 + +#define REG_RBCPR_STEP_QUOT 0x80 +#define RBCPR_STEP_QUOT_STEPQUOT_MASK GENMASK(7, 0) +#define RBCPR_STEP_QUOT_IDLE_CLK_MASK GENMASK(3, 0) +#define RBCPR_STEP_QUOT_IDLE_CLK_SHIFT 8 + +/* RBCPR Control Register */ +#define REG_RBCPR_CTL 0x90 + +#define RBCPR_CTL_LOOP_EN BIT(0) +#define RBCPR_CTL_TIMER_EN BIT(3) +#define RBCPR_CTL_SW_AUTO_CONT_ACK_EN BIT(5) +#define RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN BIT(6) +#define RBCPR_CTL_COUNT_MODE BIT(10) +#define RBCPR_CTL_UP_THRESHOLD_MASK GENMASK(3, 0) +#define RBCPR_CTL_UP_THRESHOLD_SHIFT 24 +#define RBCPR_CTL_DN_THRESHOLD_MASK GENMASK(3, 0) +#define RBCPR_CTL_DN_THRESHOLD_SHIFT 28 + +/* RBCPR Ack/Nack Response */ +#define REG_RBIF_CONT_ACK_CMD 0x98 +#define REG_RBIF_CONT_NACK_CMD 0x9c + +/* RBCPR Result status Register */ +#define REG_RBCPR_RESULT_0 0xa0 + +#define RBCPR_RESULT0_BUSY_SHIFT 19 +#define RBCPR_RESULT0_BUSY_MASK BIT(RBCPR_RESULT0_BUSY_SHIFT) +#define RBCPR_RESULT0_ERROR_LT0_SHIFT 18 +#define RBCPR_RESULT0_ERROR_SHIFT 6 +#define RBCPR_RESULT0_ERROR_MASK GENMASK(11, 0) +#define RBCPR_RESULT0_ERROR_STEPS_SHIFT 2 +#define RBCPR_RESULT0_ERROR_STEPS_MASK GENMASK(3, 0) +#define RBCPR_RESULT0_STEP_UP_SHIFT 1 + +/* RBCPR Interrupt Control Register */ +#define REG_RBIF_IRQ_EN(n) (0x100 + 4 * (n)) +#define REG_RBIF_IRQ_CLEAR 0x110 +#define REG_RBIF_IRQ_STATUS 0x114 + +#define CPR_INT_DONE BIT(0) +#define CPR_INT_MIN BIT(1) +#define CPR_INT_DOWN BIT(2) +#define CPR_INT_MID BIT(3) +#define CPR_INT_UP BIT(4) +#define CPR_INT_MAX BIT(5) +#define CPR_INT_CLAMP BIT(6) +#define CPR_INT_ALL (CPR_INT_DONE | CPR_INT_MIN | CPR_INT_DOWN | \ + CPR_INT_MID | CPR_INT_UP | CPR_INT_MAX | CPR_INT_CLAMP) +#define CPR_INT_DEFAULT (CPR_INT_UP | CPR_INT_DOWN) + +#define CPR_NUM_RING_OSC 8 + +/* CPR eFuse parameters */ +#define CPR_FUSE_TARGET_QUOT_BITS_MASK GENMASK(11, 0) + +#define CPR_FUSE_MIN_QUOT_DIFF 50 + +#define FUSE_REVISION_UNKNOWN (-1) + +enum voltage_change_dir { + NO_CHANGE, + DOWN, + UP, +}; + +struct cpr_fuse { + char *ring_osc; + char *init_voltage; + char *quotient; + char *quotient_offset; +}; + +struct fuse_corner_data { + int ref_uV; + int max_uV; + int min_uV; + int max_volt_scale; + int max_quot_scale; + /* fuse quot */ + int quot_offset; + int quot_scale; + int quot_adjust; + /* fuse quot_offset */ + int quot_offset_scale; + int quot_offset_adjust; +}; + +struct cpr_fuses { + int init_voltage_step; + int init_voltage_width; + struct fuse_corner_data *fuse_corner_data; +}; + +struct corner_data { + unsigned int fuse_corner; + unsigned long freq; +}; + +struct cpr_desc { + unsigned int num_fuse_corners; + int min_diff_quot; + int *step_quot; + + unsigned int timer_delay_us; + unsigned int timer_cons_up; + unsigned int timer_cons_down; + unsigned int up_threshold; + unsigned int down_threshold; + unsigned int idle_clocks; + unsigned int gcnt_us; + unsigned int vdd_apc_step_up_limit; + unsigned int vdd_apc_step_down_limit; + unsigned int clamp_timer_interval; + + struct cpr_fuses cpr_fuses; + bool reduce_to_fuse_uV; + bool reduce_to_corner_uV; +}; + +struct acc_desc { + unsigned int enable_reg; + u32 enable_mask; + + struct reg_sequence *config; + struct reg_sequence *settings; + int num_regs_per_fuse; +}; + +struct cpr_acc_desc { + const struct cpr_desc *cpr_desc; + const struct acc_desc *acc_desc; +}; + +struct fuse_corner { + int min_uV; + int max_uV; + int uV; + int quot; + int step_quot; + const struct reg_sequence *accs; + int num_accs; + unsigned long max_freq; + u8 ring_osc_idx; +}; + +struct corner { + int min_uV; + int max_uV; + int uV; + int last_uV; + int quot_adjust; + u32 save_ctl; + u32 save_irq; + unsigned long freq; + struct fuse_corner *fuse_corner; +}; + +struct cpr_drv { + unsigned int num_corners; + unsigned int ref_clk_khz; + + struct generic_pm_domain pd; + struct device *dev; + struct device *attached_cpu_dev; + struct mutex lock; + void __iomem *base; + struct corner *corner; + struct regulator *vdd_apc; + struct clk *cpu_clk; + struct regmap *tcsr; + bool loop_disabled; + u32 gcnt; + unsigned long flags; + + struct fuse_corner *fuse_corners; + struct corner *corners; + + const struct cpr_desc *desc; + const struct acc_desc *acc_desc; + const struct cpr_fuse *cpr_fuses; + + struct dentry *debugfs; +}; + +static bool cpr_is_allowed(struct cpr_drv *drv) +{ + return !drv->loop_disabled; +} + +static void cpr_write(struct cpr_drv *drv, u32 offset, u32 value) +{ + writel_relaxed(value, drv->base + offset); +} + +static u32 cpr_read(struct cpr_drv *drv, u32 offset) +{ + return readl_relaxed(drv->base + offset); +} + +static void +cpr_masked_write(struct cpr_drv *drv, u32 offset, u32 mask, u32 value) +{ + u32 val; + + val = readl_relaxed(drv->base + offset); + val &= ~mask; + val |= value & mask; + writel_relaxed(val, drv->base + offset); +} + +static void cpr_irq_clr(struct cpr_drv *drv) +{ + cpr_write(drv, REG_RBIF_IRQ_CLEAR, CPR_INT_ALL); +} + +static void cpr_irq_clr_nack(struct cpr_drv *drv) +{ + cpr_irq_clr(drv); + cpr_write(drv, REG_RBIF_CONT_NACK_CMD, 1); +} + +static void cpr_irq_clr_ack(struct cpr_drv *drv) +{ + cpr_irq_clr(drv); + cpr_write(drv, REG_RBIF_CONT_ACK_CMD, 1); +} + +static void cpr_irq_set(struct cpr_drv *drv, u32 int_bits) +{ + cpr_write(drv, REG_RBIF_IRQ_EN(0), int_bits); +} + +static void cpr_ctl_modify(struct cpr_drv *drv, u32 mask, u32 value) +{ + cpr_masked_write(drv, REG_RBCPR_CTL, mask, value); +} + +static void cpr_ctl_enable(struct cpr_drv *drv, struct corner *corner) +{ + u32 val, mask; + const struct cpr_desc *desc = drv->desc; + + /* Program Consecutive Up & Down */ + val = desc->timer_cons_down << RBIF_TIMER_ADJ_CONS_DOWN_SHIFT; + val |= desc->timer_cons_up << RBIF_TIMER_ADJ_CONS_UP_SHIFT; + mask = RBIF_TIMER_ADJ_CONS_UP_MASK | RBIF_TIMER_ADJ_CONS_DOWN_MASK; + cpr_masked_write(drv, REG_RBIF_TIMER_ADJUST, mask, val); + cpr_masked_write(drv, REG_RBCPR_CTL, + RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN | + RBCPR_CTL_SW_AUTO_CONT_ACK_EN, + corner->save_ctl); + cpr_irq_set(drv, corner->save_irq); + + if (cpr_is_allowed(drv) && corner->max_uV > corner->min_uV) + val = RBCPR_CTL_LOOP_EN; + else + val = 0; + cpr_ctl_modify(drv, RBCPR_CTL_LOOP_EN, val); +} + +static void cpr_ctl_disable(struct cpr_drv *drv) +{ + cpr_irq_set(drv, 0); + cpr_ctl_modify(drv, RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN | + RBCPR_CTL_SW_AUTO_CONT_ACK_EN, 0); + cpr_masked_write(drv, REG_RBIF_TIMER_ADJUST, + RBIF_TIMER_ADJ_CONS_UP_MASK | + RBIF_TIMER_ADJ_CONS_DOWN_MASK, 0); + cpr_irq_clr(drv); + cpr_write(drv, REG_RBIF_CONT_ACK_CMD, 1); + cpr_write(drv, REG_RBIF_CONT_NACK_CMD, 1); + cpr_ctl_modify(drv, RBCPR_CTL_LOOP_EN, 0); +} + +static bool cpr_ctl_is_enabled(struct cpr_drv *drv) +{ + u32 reg_val; + + reg_val = cpr_read(drv, REG_RBCPR_CTL); + return reg_val & RBCPR_CTL_LOOP_EN; +} + +static bool cpr_ctl_is_busy(struct cpr_drv *drv) +{ + u32 reg_val; + + reg_val = cpr_read(drv, REG_RBCPR_RESULT_0); + return reg_val & RBCPR_RESULT0_BUSY_MASK; +} + +static void cpr_corner_save(struct cpr_drv *drv, struct corner *corner) +{ + corner->save_ctl = cpr_read(drv, REG_RBCPR_CTL); + corner->save_irq = cpr_read(drv, REG_RBIF_IRQ_EN(0)); +} + +static void cpr_corner_restore(struct cpr_drv *drv, struct corner *corner) +{ + u32 gcnt, ctl, irq, ro_sel, step_quot; + struct fuse_corner *fuse = corner->fuse_corner; + const struct cpr_desc *desc = drv->desc; + int i; + + ro_sel = fuse->ring_osc_idx; + gcnt = drv->gcnt; + gcnt |= fuse->quot - corner->quot_adjust; + + /* Program the step quotient and idle clocks */ + step_quot = desc->idle_clocks << RBCPR_STEP_QUOT_IDLE_CLK_SHIFT; + step_quot |= fuse->step_quot & RBCPR_STEP_QUOT_STEPQUOT_MASK; + cpr_write(drv, REG_RBCPR_STEP_QUOT, step_quot); + + /* Clear the target quotient value and gate count of all ROs */ + for (i = 0; i < CPR_NUM_RING_OSC; i++) + cpr_write(drv, REG_RBCPR_GCNT_TARGET(i), 0); + + cpr_write(drv, REG_RBCPR_GCNT_TARGET(ro_sel), gcnt); + ctl = corner->save_ctl; + cpr_write(drv, REG_RBCPR_CTL, ctl); + irq = corner->save_irq; + cpr_irq_set(drv, irq); + dev_dbg(drv->dev, "gcnt = %#08x, ctl = %#08x, irq = %#08x\n", gcnt, + ctl, irq); +} + +static void cpr_set_acc(struct regmap *tcsr, struct fuse_corner *f, + struct fuse_corner *end) +{ + if (f == end) + return; + + if (f < end) { + for (f += 1; f <= end; f++) + regmap_multi_reg_write(tcsr, f->accs, f->num_accs); + } else { + for (f -= 1; f >= end; f--) + regmap_multi_reg_write(tcsr, f->accs, f->num_accs); + } +} + +static int cpr_pre_voltage(struct cpr_drv *drv, + struct fuse_corner *fuse_corner, + enum voltage_change_dir dir) +{ + struct fuse_corner *prev_fuse_corner = drv->corner->fuse_corner; + + if (drv->tcsr && dir == DOWN) + cpr_set_acc(drv->tcsr, prev_fuse_corner, fuse_corner); + + return 0; +} + +static int cpr_post_voltage(struct cpr_drv *drv, + struct fuse_corner *fuse_corner, + enum voltage_change_dir dir) +{ + struct fuse_corner *prev_fuse_corner = drv->corner->fuse_corner; + + if (drv->tcsr && dir == UP) + cpr_set_acc(drv->tcsr, prev_fuse_corner, fuse_corner); + + return 0; +} + +static int cpr_scale_voltage(struct cpr_drv *drv, struct corner *corner, + int new_uV, enum voltage_change_dir dir) +{ + int ret; + struct fuse_corner *fuse_corner = corner->fuse_corner; + + ret = cpr_pre_voltage(drv, fuse_corner, dir); + if (ret) + return ret; + + ret = regulator_set_voltage(drv->vdd_apc, new_uV, new_uV); + if (ret) { + dev_err_ratelimited(drv->dev, "failed to set apc voltage %d\n", + new_uV); + return ret; + } + + ret = cpr_post_voltage(drv, fuse_corner, dir); + if (ret) + return ret; + + return 0; +} + +static unsigned int cpr_get_cur_perf_state(struct cpr_drv *drv) +{ + return drv->corner ? drv->corner - drv->corners + 1 : 0; +} + +static int cpr_scale(struct cpr_drv *drv, enum voltage_change_dir dir) +{ + u32 val, error_steps, reg_mask; + int last_uV, new_uV, step_uV, ret; + struct corner *corner; + const struct cpr_desc *desc = drv->desc; + + if (dir != UP && dir != DOWN) + return 0; + + step_uV = regulator_get_linear_step(drv->vdd_apc); + if (!step_uV) + return -EINVAL; + + corner = drv->corner; + + val = cpr_read(drv, REG_RBCPR_RESULT_0); + + error_steps = val >> RBCPR_RESULT0_ERROR_STEPS_SHIFT; + error_steps &= RBCPR_RESULT0_ERROR_STEPS_MASK; + last_uV = corner->last_uV; + + if (dir == UP) { + if (desc->clamp_timer_interval && + error_steps < desc->up_threshold) { + /* + * Handle the case where another measurement started + * after the interrupt was triggered due to a core + * exiting from power collapse. + */ + error_steps = max(desc->up_threshold, + desc->vdd_apc_step_up_limit); + } + + if (last_uV >= corner->max_uV) { + cpr_irq_clr_nack(drv); + + /* Maximize the UP threshold */ + reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK; + reg_mask <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; + val = reg_mask; + cpr_ctl_modify(drv, reg_mask, val); + + /* Disable UP interrupt */ + cpr_irq_set(drv, CPR_INT_DEFAULT & ~CPR_INT_UP); + + return 0; + } + + if (error_steps > desc->vdd_apc_step_up_limit) + error_steps = desc->vdd_apc_step_up_limit; + + /* Calculate new voltage */ + new_uV = last_uV + error_steps * step_uV; + new_uV = min(new_uV, corner->max_uV); + + dev_dbg(drv->dev, + "UP: -> new_uV: %d last_uV: %d perf state: %u\n", + new_uV, last_uV, cpr_get_cur_perf_state(drv)); + } else { + if (desc->clamp_timer_interval && + error_steps < desc->down_threshold) { + /* + * Handle the case where another measurement started + * after the interrupt was triggered due to a core + * exiting from power collapse. + */ + error_steps = max(desc->down_threshold, + desc->vdd_apc_step_down_limit); + } + + if (last_uV <= corner->min_uV) { + cpr_irq_clr_nack(drv); + + /* Enable auto nack down */ + reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; + val = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; + + cpr_ctl_modify(drv, reg_mask, val); + + /* Disable DOWN interrupt */ + cpr_irq_set(drv, CPR_INT_DEFAULT & ~CPR_INT_DOWN); + + return 0; + } + + if (error_steps > desc->vdd_apc_step_down_limit) + error_steps = desc->vdd_apc_step_down_limit; + + /* Calculate new voltage */ + new_uV = last_uV - error_steps * step_uV; + new_uV = max(new_uV, corner->min_uV); + + dev_dbg(drv->dev, + "DOWN: -> new_uV: %d last_uV: %d perf state: %u\n", + new_uV, last_uV, cpr_get_cur_perf_state(drv)); + } + + ret = cpr_scale_voltage(drv, corner, new_uV, dir); + if (ret) { + cpr_irq_clr_nack(drv); + return ret; + } + drv->corner->last_uV = new_uV; + + if (dir == UP) { + /* Disable auto nack down */ + reg_mask = RBCPR_CTL_SW_AUTO_CONT_NACK_DN_EN; + val = 0; + } else { + /* Restore default threshold for UP */ + reg_mask = RBCPR_CTL_UP_THRESHOLD_MASK; + reg_mask <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; + val = desc->up_threshold; + val <<= RBCPR_CTL_UP_THRESHOLD_SHIFT; + } + + cpr_ctl_modify(drv, reg_mask, val); + + /* Re-enable default interrupts */ + cpr_irq_set(drv, CPR_INT_DEFAULT); + + /* Ack */ + cpr_irq_clr_ack(drv); + + return 0; +} + +static irqreturn_t cpr_irq_handler(int irq, void *dev) +{ + struct cpr_drv *drv = dev; + const struct cpr_desc *desc = drv->desc; + irqreturn_t ret = IRQ_HANDLED; + u32 val; + + mutex_lock(&drv->lock); + + val = cpr_read(drv, REG_RBIF_IRQ_STATUS); + if (drv->flags & FLAGS_IGNORE_1ST_IRQ_STATUS) + val = cpr_read(drv, REG_RBIF_IRQ_STATUS); + + dev_dbg(drv->dev, "IRQ_STATUS = %#02x\n", val); + + if (!cpr_ctl_is_enabled(drv)) { + dev_dbg(drv->dev, "CPR is disabled\n"); + ret = IRQ_NONE; + } else if (cpr_ctl_is_busy(drv) && !desc->clamp_timer_interval) { + dev_dbg(drv->dev, "CPR measurement is not ready\n"); + } else if (!cpr_is_allowed(drv)) { + val = cpr_read(drv, REG_RBCPR_CTL); + dev_err_ratelimited(drv->dev, + "Interrupt broken? RBCPR_CTL = %#02x\n", + val); + ret = IRQ_NONE; + } else { + /* + * Following sequence of handling is as per each IRQ's + * priority + */ + if (val & CPR_INT_UP) { + cpr_scale(drv, UP); + } else if (val & CPR_INT_DOWN) { + cpr_scale(drv, DOWN); + } else if (val & CPR_INT_MIN) { + cpr_irq_clr_nack(drv); + } else if (val & CPR_INT_MAX) { + cpr_irq_clr_nack(drv); + } else if (val & CPR_INT_MID) { + /* RBCPR_CTL_SW_AUTO_CONT_ACK_EN is enabled */ + dev_dbg(drv->dev, "IRQ occurred for Mid Flag\n"); + } else { + dev_dbg(drv->dev, + "IRQ occurred for unknown flag (%#08x)\n", val); + } + + /* Save register values for the corner */ + cpr_corner_save(drv, drv->corner); + } + + mutex_unlock(&drv->lock); + + return ret; +} + +static int cpr_enable(struct cpr_drv *drv) +{ + int ret; + + ret = regulator_enable(drv->vdd_apc); + if (ret) + return ret; + + mutex_lock(&drv->lock); + + if (cpr_is_allowed(drv) && drv->corner) { + cpr_irq_clr(drv); + cpr_corner_restore(drv, drv->corner); + cpr_ctl_enable(drv, drv->corner); + } + + mutex_unlock(&drv->lock); + + return 0; +} + +static int cpr_disable(struct cpr_drv *drv) +{ + mutex_lock(&drv->lock); + + if (cpr_is_allowed(drv)) { + cpr_ctl_disable(drv); + cpr_irq_clr(drv); + } + + mutex_unlock(&drv->lock); + + return regulator_disable(drv->vdd_apc); +} + +static int cpr_config(struct cpr_drv *drv) +{ + int i; + u32 val, gcnt; + struct corner *corner; + const struct cpr_desc *desc = drv->desc; + + /* Disable interrupt and CPR */ + cpr_write(drv, REG_RBIF_IRQ_EN(0), 0); + cpr_write(drv, REG_RBCPR_CTL, 0); + + /* Program the default HW ceiling, floor and vlevel */ + val = (RBIF_LIMIT_CEILING_DEFAULT & RBIF_LIMIT_CEILING_MASK) + << RBIF_LIMIT_CEILING_SHIFT; + val |= RBIF_LIMIT_FLOOR_DEFAULT & RBIF_LIMIT_FLOOR_MASK; + cpr_write(drv, REG_RBIF_LIMIT, val); + cpr_write(drv, REG_RBIF_SW_VLEVEL, RBIF_SW_VLEVEL_DEFAULT); + + /* + * Clear the target quotient value and gate count of all + * ring oscillators + */ + for (i = 0; i < CPR_NUM_RING_OSC; i++) + cpr_write(drv, REG_RBCPR_GCNT_TARGET(i), 0); + + /* Init and save gcnt */ + gcnt = (drv->ref_clk_khz * desc->gcnt_us) / 1000; + gcnt = gcnt & RBCPR_GCNT_TARGET_GCNT_MASK; + gcnt <<= RBCPR_GCNT_TARGET_GCNT_SHIFT; + drv->gcnt = gcnt; + + /* Program the delay count for the timer */ + val = (drv->ref_clk_khz * desc->timer_delay_us) / 1000; + cpr_write(drv, REG_RBCPR_TIMER_INTERVAL, val); + dev_dbg(drv->dev, "Timer count: %#0x (for %d us)\n", val, + desc->timer_delay_us); + + /* Program Consecutive Up & Down */ + val = desc->timer_cons_down << RBIF_TIMER_ADJ_CONS_DOWN_SHIFT; + val |= desc->timer_cons_up << RBIF_TIMER_ADJ_CONS_UP_SHIFT; + val |= desc->clamp_timer_interval << RBIF_TIMER_ADJ_CLAMP_INT_SHIFT; + cpr_write(drv, REG_RBIF_TIMER_ADJUST, val); + + /* Program the control register */ + val = desc->up_threshold << RBCPR_CTL_UP_THRESHOLD_SHIFT; + val |= desc->down_threshold << RBCPR_CTL_DN_THRESHOLD_SHIFT; + val |= RBCPR_CTL_TIMER_EN | RBCPR_CTL_COUNT_MODE; + val |= RBCPR_CTL_SW_AUTO_CONT_ACK_EN; + cpr_write(drv, REG_RBCPR_CTL, val); + + for (i = 0; i < drv->num_corners; i++) { + corner = &drv->corners[i]; + corner->save_ctl = val; + corner->save_irq = CPR_INT_DEFAULT; + } + + cpr_irq_set(drv, CPR_INT_DEFAULT); + + val = cpr_read(drv, REG_RBCPR_VERSION); + if (val <= RBCPR_VER_2) + drv->flags |= FLAGS_IGNORE_1ST_IRQ_STATUS; + + return 0; +} + +static int cpr_set_performance_state(struct generic_pm_domain *domain, + unsigned int state) +{ + struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); + struct corner *corner, *end; + enum voltage_change_dir dir; + int ret = 0, new_uV; + + mutex_lock(&drv->lock); + + dev_dbg(drv->dev, "%s: setting perf state: %u (prev state: %u)\n", + __func__, state, cpr_get_cur_perf_state(drv)); + + /* + * Determine new corner we're going to. + * Remove one since lowest performance state is 1. + */ + corner = drv->corners + state - 1; + end = &drv->corners[drv->num_corners - 1]; + if (corner > end || corner < drv->corners) { + ret = -EINVAL; + goto unlock; + } + + /* Determine direction */ + if (drv->corner > corner) + dir = DOWN; + else if (drv->corner < corner) + dir = UP; + else + dir = NO_CHANGE; + + if (cpr_is_allowed(drv)) + new_uV = corner->last_uV; + else + new_uV = corner->uV; + + if (cpr_is_allowed(drv)) + cpr_ctl_disable(drv); + + ret = cpr_scale_voltage(drv, corner, new_uV, dir); + if (ret) + goto unlock; + + if (cpr_is_allowed(drv)) { + cpr_irq_clr(drv); + if (drv->corner != corner) + cpr_corner_restore(drv, corner); + cpr_ctl_enable(drv, corner); + } + + drv->corner = corner; + +unlock: + mutex_unlock(&drv->lock); + + return ret; +} + +static int cpr_read_efuse(struct device *dev, const char *cname, u32 *data) +{ + struct nvmem_cell *cell; + ssize_t len; + char *ret; + int i; + + *data = 0; + + cell = nvmem_cell_get(dev, cname); + if (IS_ERR(cell)) { + if (PTR_ERR(cell) != -EPROBE_DEFER) + dev_err(dev, "undefined cell %s\n", cname); + return PTR_ERR(cell); + } + + ret = nvmem_cell_read(cell, &len); + nvmem_cell_put(cell); + if (IS_ERR(ret)) { + dev_err(dev, "can't read cell %s\n", cname); + return PTR_ERR(ret); + } + + for (i = 0; i < len; i++) + *data |= ret[i] << (8 * i); + + kfree(ret); + dev_dbg(dev, "efuse read(%s) = %x, bytes %zd\n", cname, *data, len); + + return 0; +} + +static int +cpr_populate_ring_osc_idx(struct cpr_drv *drv) +{ + struct fuse_corner *fuse = drv->fuse_corners; + struct fuse_corner *end = fuse + drv->desc->num_fuse_corners; + const struct cpr_fuse *fuses = drv->cpr_fuses; + u32 data; + int ret; + + for (; fuse < end; fuse++, fuses++) { + ret = cpr_read_efuse(drv->dev, fuses->ring_osc, + &data); + if (ret) + return ret; + fuse->ring_osc_idx = data; + } + + return 0; +} + +static int cpr_read_fuse_uV(const struct cpr_desc *desc, + const struct fuse_corner_data *fdata, + const char *init_v_efuse, + int step_volt, + struct cpr_drv *drv) +{ + int step_size_uV, steps, uV; + u32 bits = 0; + int ret; + + ret = cpr_read_efuse(drv->dev, init_v_efuse, &bits); + if (ret) + return ret; + + steps = bits & ~BIT(desc->cpr_fuses.init_voltage_width - 1); + /* Not two's complement.. instead highest bit is sign bit */ + if (bits & BIT(desc->cpr_fuses.init_voltage_width - 1)) + steps = -steps; + + step_size_uV = desc->cpr_fuses.init_voltage_step; + + uV = fdata->ref_uV + steps * step_size_uV; + return DIV_ROUND_UP(uV, step_volt) * step_volt; +} + +static int cpr_fuse_corner_init(struct cpr_drv *drv) +{ + const struct cpr_desc *desc = drv->desc; + const struct cpr_fuse *fuses = drv->cpr_fuses; + const struct acc_desc *acc_desc = drv->acc_desc; + int i; + unsigned int step_volt; + struct fuse_corner_data *fdata; + struct fuse_corner *fuse, *end; + int uV; + const struct reg_sequence *accs; + int ret; + + accs = acc_desc->settings; + + step_volt = regulator_get_linear_step(drv->vdd_apc); + if (!step_volt) + return -EINVAL; + + /* Populate fuse_corner members */ + fuse = drv->fuse_corners; + end = &fuse[desc->num_fuse_corners - 1]; + fdata = desc->cpr_fuses.fuse_corner_data; + + for (i = 0; fuse <= end; fuse++, fuses++, i++, fdata++) { + /* + * Update SoC voltages: platforms might choose a different + * regulators than the one used to characterize the algorithms + * (ie, init_voltage_step). + */ + fdata->min_uV = roundup(fdata->min_uV, step_volt); + fdata->max_uV = roundup(fdata->max_uV, step_volt); + + /* Populate uV */ + uV = cpr_read_fuse_uV(desc, fdata, fuses->init_voltage, + step_volt, drv); + if (uV < 0) + return uV; + + fuse->min_uV = fdata->min_uV; + fuse->max_uV = fdata->max_uV; + fuse->uV = clamp(uV, fuse->min_uV, fuse->max_uV); + + if (fuse == end) { + /* + * Allow the highest fuse corner's PVS voltage to + * define the ceiling voltage for that corner in order + * to support SoC's in which variable ceiling values + * are required. + */ + end->max_uV = max(end->max_uV, end->uV); + } + + /* Populate target quotient by scaling */ + ret = cpr_read_efuse(drv->dev, fuses->quotient, &fuse->quot); + if (ret) + return ret; + + fuse->quot *= fdata->quot_scale; + fuse->quot += fdata->quot_offset; + fuse->quot += fdata->quot_adjust; + fuse->step_quot = desc->step_quot[fuse->ring_osc_idx]; + + /* Populate acc settings */ + fuse->accs = accs; + fuse->num_accs = acc_desc->num_regs_per_fuse; + accs += acc_desc->num_regs_per_fuse; + } + + /* + * Restrict all fuse corner PVS voltages based upon per corner + * ceiling and floor voltages. + */ + for (fuse = drv->fuse_corners, i = 0; fuse <= end; fuse++, i++) { + if (fuse->uV > fuse->max_uV) + fuse->uV = fuse->max_uV; + else if (fuse->uV < fuse->min_uV) + fuse->uV = fuse->min_uV; + + ret = regulator_is_supported_voltage(drv->vdd_apc, + fuse->min_uV, + fuse->min_uV); + if (!ret) { + dev_err(drv->dev, + "min uV: %d (fuse corner: %d) not supported by regulator\n", + fuse->min_uV, i); + return -EINVAL; + } + + ret = regulator_is_supported_voltage(drv->vdd_apc, + fuse->max_uV, + fuse->max_uV); + if (!ret) { + dev_err(drv->dev, + "max uV: %d (fuse corner: %d) not supported by regulator\n", + fuse->max_uV, i); + return -EINVAL; + } + + dev_dbg(drv->dev, + "fuse corner %d: [%d %d %d] RO%hhu quot %d squot %d\n", + i, fuse->min_uV, fuse->uV, fuse->max_uV, + fuse->ring_osc_idx, fuse->quot, fuse->step_quot); + } + + return 0; +} + +static int cpr_calculate_scaling(const char *quot_offset, + struct cpr_drv *drv, + const struct fuse_corner_data *fdata, + const struct corner *corner) +{ + u32 quot_diff = 0; + unsigned long freq_diff; + int scaling; + const struct fuse_corner *fuse, *prev_fuse; + int ret; + + fuse = corner->fuse_corner; + prev_fuse = fuse - 1; + + if (quot_offset) { + ret = cpr_read_efuse(drv->dev, quot_offset, "_diff); + if (ret) + return ret; + + quot_diff *= fdata->quot_offset_scale; + quot_diff += fdata->quot_offset_adjust; + } else { + quot_diff = fuse->quot - prev_fuse->quot; + } + + freq_diff = fuse->max_freq - prev_fuse->max_freq; + freq_diff /= 1000000; /* Convert to MHz */ + scaling = 1000 * quot_diff / freq_diff; + return min(scaling, fdata->max_quot_scale); +} + +static int cpr_interpolate(const struct corner *corner, int step_volt, + const struct fuse_corner_data *fdata) +{ + unsigned long f_high, f_low, f_diff; + int uV_high, uV_low, uV; + u64 temp, temp_limit; + const struct fuse_corner *fuse, *prev_fuse; + + fuse = corner->fuse_corner; + prev_fuse = fuse - 1; + + f_high = fuse->max_freq; + f_low = prev_fuse->max_freq; + uV_high = fuse->uV; + uV_low = prev_fuse->uV; + f_diff = fuse->max_freq - corner->freq; + + /* + * Don't interpolate in the wrong direction. This could happen + * if the adjusted fuse voltage overlaps with the previous fuse's + * adjusted voltage. + */ + if (f_high <= f_low || uV_high <= uV_low || f_high <= corner->freq) + return corner->uV; + + temp = f_diff * (uV_high - uV_low); + do_div(temp, f_high - f_low); + + /* + * max_volt_scale has units of uV/MHz while freq values + * have units of Hz. Divide by 1000000 to convert to. + */ + temp_limit = f_diff * fdata->max_volt_scale; + do_div(temp_limit, 1000000); + + uV = uV_high - min(temp, temp_limit); + return roundup(uV, step_volt); +} + +static unsigned int cpr_get_fuse_corner(struct dev_pm_opp *opp) +{ + struct device_node *np; + unsigned int fuse_corner = 0; + + np = dev_pm_opp_get_of_node(opp); + if (of_property_read_u32(np, "qcom,opp-fuse-level", &fuse_corner)) + pr_err("%s: missing 'qcom,opp-fuse-level' property\n", + __func__); + + of_node_put(np); + + return fuse_corner; +} + +static unsigned long cpr_get_opp_hz_for_req(struct dev_pm_opp *ref, + struct device *cpu_dev) +{ + u64 rate = 0; + struct device_node *ref_np; + struct device_node *desc_np; + struct device_node *child_np = NULL; + struct device_node *child_req_np = NULL; + + desc_np = dev_pm_opp_of_get_opp_desc_node(cpu_dev); + if (!desc_np) + return 0; + + ref_np = dev_pm_opp_get_of_node(ref); + if (!ref_np) + goto out_ref; + + do { + of_node_put(child_req_np); + child_np = of_get_next_available_child(desc_np, child_np); + child_req_np = of_parse_phandle(child_np, "required-opps", 0); + } while (child_np && child_req_np != ref_np); + + if (child_np && child_req_np == ref_np) + of_property_read_u64(child_np, "opp-hz", &rate); + + of_node_put(child_req_np); + of_node_put(child_np); + of_node_put(ref_np); +out_ref: + of_node_put(desc_np); + + return (unsigned long) rate; +} + +static int cpr_corner_init(struct cpr_drv *drv) +{ + const struct cpr_desc *desc = drv->desc; + const struct cpr_fuse *fuses = drv->cpr_fuses; + int i, level, scaling = 0; + unsigned int fnum, fc; + const char *quot_offset; + struct fuse_corner *fuse, *prev_fuse; + struct corner *corner, *end; + struct corner_data *cdata; + const struct fuse_corner_data *fdata; + bool apply_scaling; + unsigned long freq_diff, freq_diff_mhz; + unsigned long freq; + int step_volt = regulator_get_linear_step(drv->vdd_apc); + struct dev_pm_opp *opp; + + if (!step_volt) + return -EINVAL; + + corner = drv->corners; + end = &corner[drv->num_corners - 1]; + + cdata = devm_kcalloc(drv->dev, drv->num_corners, + sizeof(struct corner_data), + GFP_KERNEL); + if (!cdata) + return -ENOMEM; + + /* + * Store maximum frequency for each fuse corner based on the frequency + * plan + */ + for (level = 1; level <= drv->num_corners; level++) { + opp = dev_pm_opp_find_level_exact(&drv->pd.dev, level); + if (IS_ERR(opp)) + return -EINVAL; + fc = cpr_get_fuse_corner(opp); + if (!fc) { + dev_pm_opp_put(opp); + return -EINVAL; + } + fnum = fc - 1; + freq = cpr_get_opp_hz_for_req(opp, drv->attached_cpu_dev); + if (!freq) { + dev_pm_opp_put(opp); + return -EINVAL; + } + cdata[level - 1].fuse_corner = fnum; + cdata[level - 1].freq = freq; + + fuse = &drv->fuse_corners[fnum]; + dev_dbg(drv->dev, "freq: %lu level: %u fuse level: %u\n", + freq, dev_pm_opp_get_level(opp) - 1, fnum); + if (freq > fuse->max_freq) + fuse->max_freq = freq; + dev_pm_opp_put(opp); + } + + /* + * Get the quotient adjustment scaling factor, according to: + * + * scaling = min(1000 * (QUOT(corner_N) - QUOT(corner_N-1)) + * / (freq(corner_N) - freq(corner_N-1)), max_factor) + * + * QUOT(corner_N): quotient read from fuse for fuse corner N + * QUOT(corner_N-1): quotient read from fuse for fuse corner (N - 1) + * freq(corner_N): max frequency in MHz supported by fuse corner N + * freq(corner_N-1): max frequency in MHz supported by fuse corner + * (N - 1) + * + * Then walk through the corners mapped to each fuse corner + * and calculate the quotient adjustment for each one using the + * following formula: + * + * quot_adjust = (freq_max - freq_corner) * scaling / 1000 + * + * freq_max: max frequency in MHz supported by the fuse corner + * freq_corner: frequency in MHz corresponding to the corner + * scaling: calculated from above equation + * + * + * + + + * | v | + * q | f c o | f c + * u | c l | c + * o | f t | f + * t | c a | c + * | c f g | c f + * | e | + * +--------------- +---------------- + * 0 1 2 3 4 5 6 0 1 2 3 4 5 6 + * corner corner + * + * c = corner + * f = fuse corner + * + */ + for (apply_scaling = false, i = 0; corner <= end; corner++, i++) { + fnum = cdata[i].fuse_corner; + fdata = &desc->cpr_fuses.fuse_corner_data[fnum]; + quot_offset = fuses[fnum].quotient_offset; + fuse = &drv->fuse_corners[fnum]; + if (fnum) + prev_fuse = &drv->fuse_corners[fnum - 1]; + else + prev_fuse = NULL; + + corner->fuse_corner = fuse; + corner->freq = cdata[i].freq; + corner->uV = fuse->uV; + + if (prev_fuse && cdata[i - 1].freq == prev_fuse->max_freq) { + scaling = cpr_calculate_scaling(quot_offset, drv, + fdata, corner); + if (scaling < 0) + return scaling; + + apply_scaling = true; + } else if (corner->freq == fuse->max_freq) { + /* This is a fuse corner; don't scale anything */ + apply_scaling = false; + } + + if (apply_scaling) { + freq_diff = fuse->max_freq - corner->freq; + freq_diff_mhz = freq_diff / 1000000; + corner->quot_adjust = scaling * freq_diff_mhz / 1000; + + corner->uV = cpr_interpolate(corner, step_volt, fdata); + } + + corner->max_uV = fuse->max_uV; + corner->min_uV = fuse->min_uV; + corner->uV = clamp(corner->uV, corner->min_uV, corner->max_uV); + corner->last_uV = corner->uV; + + /* Reduce the ceiling voltage if needed */ + if (desc->reduce_to_corner_uV && corner->uV < corner->max_uV) + corner->max_uV = corner->uV; + else if (desc->reduce_to_fuse_uV && fuse->uV < corner->max_uV) + corner->max_uV = max(corner->min_uV, fuse->uV); + + dev_dbg(drv->dev, "corner %d: [%d %d %d] quot %d\n", i, + corner->min_uV, corner->uV, corner->max_uV, + fuse->quot - corner->quot_adjust); + } + + return 0; +} + +static const struct cpr_fuse *cpr_get_fuses(struct cpr_drv *drv) +{ + const struct cpr_desc *desc = drv->desc; + struct cpr_fuse *fuses; + int i; + + fuses = devm_kcalloc(drv->dev, desc->num_fuse_corners, + sizeof(struct cpr_fuse), + GFP_KERNEL); + if (!fuses) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < desc->num_fuse_corners; i++) { + char tbuf[32]; + + snprintf(tbuf, 32, "cpr_ring_osc%d", i + 1); + fuses[i].ring_osc = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL); + if (!fuses[i].ring_osc) + return ERR_PTR(-ENOMEM); + + snprintf(tbuf, 32, "cpr_init_voltage%d", i + 1); + fuses[i].init_voltage = devm_kstrdup(drv->dev, tbuf, + GFP_KERNEL); + if (!fuses[i].init_voltage) + return ERR_PTR(-ENOMEM); + + snprintf(tbuf, 32, "cpr_quotient%d", i + 1); + fuses[i].quotient = devm_kstrdup(drv->dev, tbuf, GFP_KERNEL); + if (!fuses[i].quotient) + return ERR_PTR(-ENOMEM); + + snprintf(tbuf, 32, "cpr_quotient_offset%d", i + 1); + fuses[i].quotient_offset = devm_kstrdup(drv->dev, tbuf, + GFP_KERNEL); + if (!fuses[i].quotient_offset) + return ERR_PTR(-ENOMEM); + } + + return fuses; +} + +static void cpr_set_loop_allowed(struct cpr_drv *drv) +{ + drv->loop_disabled = false; +} + +static int cpr_init_parameters(struct cpr_drv *drv) +{ + const struct cpr_desc *desc = drv->desc; + struct clk *clk; + + clk = clk_get(drv->dev, "ref"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + drv->ref_clk_khz = clk_get_rate(clk) / 1000; + clk_put(clk); + + if (desc->timer_cons_up > RBIF_TIMER_ADJ_CONS_UP_MASK || + desc->timer_cons_down > RBIF_TIMER_ADJ_CONS_DOWN_MASK || + desc->up_threshold > RBCPR_CTL_UP_THRESHOLD_MASK || + desc->down_threshold > RBCPR_CTL_DN_THRESHOLD_MASK || + desc->idle_clocks > RBCPR_STEP_QUOT_IDLE_CLK_MASK || + desc->clamp_timer_interval > RBIF_TIMER_ADJ_CLAMP_INT_MASK) + return -EINVAL; + + dev_dbg(drv->dev, "up threshold = %u, down threshold = %u\n", + desc->up_threshold, desc->down_threshold); + + return 0; +} + +static int cpr_find_initial_corner(struct cpr_drv *drv) +{ + unsigned long rate; + const struct corner *end; + struct corner *iter; + unsigned int i = 0; + + if (!drv->cpu_clk) { + dev_err(drv->dev, "cannot get rate from NULL clk\n"); + return -EINVAL; + } + + end = &drv->corners[drv->num_corners - 1]; + rate = clk_get_rate(drv->cpu_clk); + + /* + * Some bootloaders set a CPU clock frequency that is not defined + * in the OPP table. When running at an unlisted frequency, + * cpufreq_online() will change to the OPP which has the lowest + * frequency, at or above the unlisted frequency. + * Since cpufreq_online() always "rounds up" in the case of an + * unlisted frequency, this function always "rounds down" in case + * of an unlisted frequency. That way, when cpufreq_online() + * triggers the first ever call to cpr_set_performance_state(), + * it will correctly determine the direction as UP. + */ + for (iter = drv->corners; iter <= end; iter++) { + if (iter->freq > rate) + break; + i++; + if (iter->freq == rate) { + drv->corner = iter; + break; + } + if (iter->freq < rate) + drv->corner = iter; + } + + if (!drv->corner) { + dev_err(drv->dev, "boot up corner not found\n"); + return -EINVAL; + } + + dev_dbg(drv->dev, "boot up perf state: %u\n", i); + + return 0; +} + +static const struct cpr_desc qcs404_cpr_desc = { + .num_fuse_corners = 3, + .min_diff_quot = CPR_FUSE_MIN_QUOT_DIFF, + .step_quot = (int []){ 25, 25, 25, }, + .timer_delay_us = 5000, + .timer_cons_up = 0, + .timer_cons_down = 2, + .up_threshold = 1, + .down_threshold = 3, + .idle_clocks = 15, + .gcnt_us = 1, + .vdd_apc_step_up_limit = 1, + .vdd_apc_step_down_limit = 1, + .cpr_fuses = { + .init_voltage_step = 8000, + .init_voltage_width = 6, + .fuse_corner_data = (struct fuse_corner_data[]){ + /* fuse corner 0 */ + { + .ref_uV = 1224000, + .max_uV = 1224000, + .min_uV = 1048000, + .max_volt_scale = 0, + .max_quot_scale = 0, + .quot_offset = 0, + .quot_scale = 1, + .quot_adjust = 0, + .quot_offset_scale = 5, + .quot_offset_adjust = 0, + }, + /* fuse corner 1 */ + { + .ref_uV = 1288000, + .max_uV = 1288000, + .min_uV = 1048000, + .max_volt_scale = 2000, + .max_quot_scale = 1400, + .quot_offset = 0, + .quot_scale = 1, + .quot_adjust = -20, + .quot_offset_scale = 5, + .quot_offset_adjust = 0, + }, + /* fuse corner 2 */ + { + .ref_uV = 1352000, + .max_uV = 1384000, + .min_uV = 1088000, + .max_volt_scale = 2000, + .max_quot_scale = 1400, + .quot_offset = 0, + .quot_scale = 1, + .quot_adjust = 0, + .quot_offset_scale = 5, + .quot_offset_adjust = 0, + }, + }, + }, +}; + +static const struct acc_desc qcs404_acc_desc = { + .settings = (struct reg_sequence[]){ + { 0xb120, 0x1041040 }, + { 0xb124, 0x41 }, + { 0xb120, 0x0 }, + { 0xb124, 0x0 }, + { 0xb120, 0x0 }, + { 0xb124, 0x0 }, + }, + .config = (struct reg_sequence[]){ + { 0xb138, 0xff }, + { 0xb130, 0x5555 }, + }, + .num_regs_per_fuse = 2, +}; + +static const struct cpr_acc_desc qcs404_cpr_acc_desc = { + .cpr_desc = &qcs404_cpr_desc, + .acc_desc = &qcs404_acc_desc, +}; + +static unsigned int cpr_get_performance_state(struct generic_pm_domain *genpd, + struct dev_pm_opp *opp) +{ + return dev_pm_opp_get_level(opp); +} + +static int cpr_power_off(struct generic_pm_domain *domain) +{ + struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); + + return cpr_disable(drv); +} + +static int cpr_power_on(struct generic_pm_domain *domain) +{ + struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); + + return cpr_enable(drv); +} + +static int cpr_pd_attach_dev(struct generic_pm_domain *domain, + struct device *dev) +{ + struct cpr_drv *drv = container_of(domain, struct cpr_drv, pd); + const struct acc_desc *acc_desc = drv->acc_desc; + int ret = 0; + + mutex_lock(&drv->lock); + + dev_dbg(drv->dev, "attach callback for: %s\n", dev_name(dev)); + + /* + * This driver only supports scaling voltage for a CPU cluster + * where all CPUs in the cluster share a single regulator. + * Therefore, save the struct device pointer only for the first + * CPU device that gets attached. There is no need to do any + * additional initialization when further CPUs get attached. + */ + if (drv->attached_cpu_dev) + goto unlock; + + /* + * cpr_scale_voltage() requires the direction (if we are changing + * to a higher or lower OPP). The first time + * cpr_set_performance_state() is called, there is no previous + * performance state defined. Therefore, we call + * cpr_find_initial_corner() that gets the CPU clock frequency + * set by the bootloader, so that we can determine the direction + * the first time cpr_set_performance_state() is called. + */ + drv->cpu_clk = devm_clk_get(dev, NULL); + if (IS_ERR(drv->cpu_clk)) { + ret = PTR_ERR(drv->cpu_clk); + if (ret != -EPROBE_DEFER) + dev_err(drv->dev, "could not get cpu clk: %d\n", ret); + goto unlock; + } + drv->attached_cpu_dev = dev; + + dev_dbg(drv->dev, "using cpu clk from: %s\n", + dev_name(drv->attached_cpu_dev)); + + /* + * Everything related to (virtual) corners has to be initialized + * here, when attaching to the power domain, since we need to know + * the maximum frequency for each fuse corner, and this is only + * available after the cpufreq driver has attached to us. + * The reason for this is that we need to know the highest + * frequency associated with each fuse corner. + */ + ret = dev_pm_opp_get_opp_count(&drv->pd.dev); + if (ret < 0) { + dev_err(drv->dev, "could not get OPP count\n"); + goto unlock; + } + drv->num_corners = ret; + + if (drv->num_corners < 2) { + dev_err(drv->dev, "need at least 2 OPPs to use CPR\n"); + ret = -EINVAL; + goto unlock; + } + + drv->corners = devm_kcalloc(drv->dev, drv->num_corners, + sizeof(*drv->corners), + GFP_KERNEL); + if (!drv->corners) { + ret = -ENOMEM; + goto unlock; + } + + ret = cpr_corner_init(drv); + if (ret) + goto unlock; + + cpr_set_loop_allowed(drv); + + ret = cpr_init_parameters(drv); + if (ret) + goto unlock; + + /* Configure CPR HW but keep it disabled */ + ret = cpr_config(drv); + if (ret) + goto unlock; + + ret = cpr_find_initial_corner(drv); + if (ret) + goto unlock; + + if (acc_desc->config) + regmap_multi_reg_write(drv->tcsr, acc_desc->config, + acc_desc->num_regs_per_fuse); + + /* Enable ACC if required */ + if (acc_desc->enable_mask) + regmap_update_bits(drv->tcsr, acc_desc->enable_reg, + acc_desc->enable_mask, + acc_desc->enable_mask); + + dev_info(drv->dev, "driver initialized with %u OPPs\n", + drv->num_corners); + +unlock: + mutex_unlock(&drv->lock); + + return ret; +} + +static int cpr_debug_info_show(struct seq_file *s, void *unused) +{ + u32 gcnt, ro_sel, ctl, irq_status, reg, error_steps; + u32 step_dn, step_up, error, error_lt0, busy; + struct cpr_drv *drv = s->private; + struct fuse_corner *fuse_corner; + struct corner *corner; + + corner = drv->corner; + fuse_corner = corner->fuse_corner; + + seq_printf(s, "corner, current_volt = %d uV\n", + corner->last_uV); + + ro_sel = fuse_corner->ring_osc_idx; + gcnt = cpr_read(drv, REG_RBCPR_GCNT_TARGET(ro_sel)); + seq_printf(s, "rbcpr_gcnt_target (%u) = %#02X\n", ro_sel, gcnt); + + ctl = cpr_read(drv, REG_RBCPR_CTL); + seq_printf(s, "rbcpr_ctl = %#02X\n", ctl); + + irq_status = cpr_read(drv, REG_RBIF_IRQ_STATUS); + seq_printf(s, "rbcpr_irq_status = %#02X\n", irq_status); + + reg = cpr_read(drv, REG_RBCPR_RESULT_0); + seq_printf(s, "rbcpr_result_0 = %#02X\n", reg); + + step_dn = reg & 0x01; + step_up = (reg >> RBCPR_RESULT0_STEP_UP_SHIFT) & 0x01; + seq_printf(s, " [step_dn = %u", step_dn); + + seq_printf(s, ", step_up = %u", step_up); + + error_steps = (reg >> RBCPR_RESULT0_ERROR_STEPS_SHIFT) + & RBCPR_RESULT0_ERROR_STEPS_MASK; + seq_printf(s, ", error_steps = %u", error_steps); + + error = (reg >> RBCPR_RESULT0_ERROR_SHIFT) & RBCPR_RESULT0_ERROR_MASK; + seq_printf(s, ", error = %u", error); + + error_lt0 = (reg >> RBCPR_RESULT0_ERROR_LT0_SHIFT) & 0x01; + seq_printf(s, ", error_lt_0 = %u", error_lt0); + + busy = (reg >> RBCPR_RESULT0_BUSY_SHIFT) & 0x01; + seq_printf(s, ", busy = %u]\n", busy); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(cpr_debug_info); + +static void cpr_debugfs_init(struct cpr_drv *drv) +{ + drv->debugfs = debugfs_create_dir("qcom_cpr", NULL); + + debugfs_create_file("debug_info", 0444, drv->debugfs, + drv, &cpr_debug_info_fops); +} + +static int cpr_probe(struct platform_device *pdev) +{ + struct resource *res; + struct device *dev = &pdev->dev; + struct cpr_drv *drv; + int irq, ret; + const struct cpr_acc_desc *data; + struct device_node *np; + u32 cpr_rev = FUSE_REVISION_UNKNOWN; + + data = of_device_get_match_data(dev); + if (!data || !data->cpr_desc || !data->acc_desc) + return -EINVAL; + + drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL); + if (!drv) + return -ENOMEM; + drv->dev = dev; + drv->desc = data->cpr_desc; + drv->acc_desc = data->acc_desc; + + drv->fuse_corners = devm_kcalloc(dev, drv->desc->num_fuse_corners, + sizeof(*drv->fuse_corners), + GFP_KERNEL); + if (!drv->fuse_corners) + return -ENOMEM; + + np = of_parse_phandle(dev->of_node, "acc-syscon", 0); + if (!np) + return -ENODEV; + + drv->tcsr = syscon_node_to_regmap(np); + of_node_put(np); + if (IS_ERR(drv->tcsr)) + return PTR_ERR(drv->tcsr); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + drv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(drv->base)) + return PTR_ERR(drv->base); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -EINVAL; + + drv->vdd_apc = devm_regulator_get(dev, "vdd-apc"); + if (IS_ERR(drv->vdd_apc)) + return PTR_ERR(drv->vdd_apc); + + /* + * Initialize fuse corners, since it simply depends + * on data in efuses. + * Everything related to (virtual) corners has to be + * initialized after attaching to the power domain, + * since it depends on the CPU's OPP table. + */ + ret = cpr_read_efuse(dev, "cpr_fuse_revision", &cpr_rev); + if (ret) + return ret; + + drv->cpr_fuses = cpr_get_fuses(drv); + if (IS_ERR(drv->cpr_fuses)) + return PTR_ERR(drv->cpr_fuses); + + ret = cpr_populate_ring_osc_idx(drv); + if (ret) + return ret; + + ret = cpr_fuse_corner_init(drv); + if (ret) + return ret; + + mutex_init(&drv->lock); + + ret = devm_request_threaded_irq(dev, irq, NULL, + cpr_irq_handler, + IRQF_ONESHOT | IRQF_TRIGGER_RISING, + "cpr", drv); + if (ret) + return ret; + + drv->pd.name = devm_kstrdup_const(dev, dev->of_node->full_name, + GFP_KERNEL); + if (!drv->pd.name) + return -EINVAL; + + drv->pd.power_off = cpr_power_off; + drv->pd.power_on = cpr_power_on; + drv->pd.set_performance_state = cpr_set_performance_state; + drv->pd.opp_to_performance_state = cpr_get_performance_state; + drv->pd.attach_dev = cpr_pd_attach_dev; + + ret = pm_genpd_init(&drv->pd, NULL, true); + if (ret) + return ret; + + ret = of_genpd_add_provider_simple(dev->of_node, &drv->pd); + if (ret) + return ret; + + platform_set_drvdata(pdev, drv); + cpr_debugfs_init(drv); + + return 0; +} + +static int cpr_remove(struct platform_device *pdev) +{ + struct cpr_drv *drv = platform_get_drvdata(pdev); + + if (cpr_is_allowed(drv)) { + cpr_ctl_disable(drv); + cpr_irq_set(drv, 0); + } + + of_genpd_del_provider(pdev->dev.of_node); + pm_genpd_remove(&drv->pd); + + debugfs_remove_recursive(drv->debugfs); + + return 0; +} + +static const struct of_device_id cpr_match_table[] = { + { .compatible = "qcom,qcs404-cpr", .data = &qcs404_cpr_acc_desc }, + { } +}; +MODULE_DEVICE_TABLE(of, cpr_match_table); + +static struct platform_driver cpr_driver = { + .probe = cpr_probe, + .remove = cpr_remove, + .driver = { + .name = "qcom-cpr", + .of_match_table = cpr_match_table, + }, +}; +module_platform_driver(cpr_driver); + +MODULE_DESCRIPTION("Core Power Reduction (CPR) driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c index 429b5a60a1ba..70fbe70c6213 100644 --- a/drivers/soc/qcom/llcc-qcom.c +++ b/drivers/soc/qcom/llcc-qcom.c @@ -387,7 +387,6 @@ static int qcom_llcc_remove(struct platform_device *pdev) static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, const char *name) { - struct resource *res; void __iomem *base; struct regmap_config llcc_regmap_config = { .reg_bits = 32, @@ -396,11 +395,7 @@ static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev, .fast_io = true, }; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); - if (!res) - return ERR_PTR(-ENODEV); - - base = devm_ioremap_resource(&pdev->dev, res); + base = devm_platform_ioremap_resource_byname(pdev, name); if (IS_ERR(base)) return ERR_CAST(base); diff --git a/drivers/soc/qcom/pdr_internal.h b/drivers/soc/qcom/pdr_internal.h index 15b5002e4127..ab9ae8cdfa54 100644 --- a/drivers/soc/qcom/pdr_internal.h +++ b/drivers/soc/qcom/pdr_internal.h @@ -185,7 +185,7 @@ struct qmi_elem_info servreg_get_domain_list_resp_ei[] = { .data_type = QMI_STRUCT, .elem_len = SERVREG_DOMAIN_LIST_LENGTH, .elem_size = sizeof(struct servreg_location_entry), - .array_type = NO_ARRAY, + .array_type = VAR_LEN_ARRAY, .tlv_type = 0x12, .offset = offsetof(struct servreg_get_domain_list_resp, domain_list), diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h index ef60e790a750..344ba687c13b 100644 --- a/drivers/soc/qcom/rpmh-internal.h +++ b/drivers/soc/qcom/rpmh-internal.h @@ -8,6 +8,7 @@ #define __RPM_INTERNAL_H__ #include <linux/bitmap.h> +#include <linux/wait.h> #include <soc/qcom/tcs.h> #define TCS_TYPE_NR 4 @@ -106,6 +107,8 @@ struct rpmh_ctrlr { * @lock: Synchronize state of the controller. If RPMH's cache * lock will also be held, the order is: drv->lock then * cache_lock. + * @tcs_wait: Wait queue used to wait for @tcs_in_use to free up a + * slot * @client: Handle to the DRV's client. */ struct rsc_drv { @@ -118,6 +121,7 @@ struct rsc_drv { struct tcs_group tcs[TCS_TYPE_NR]; DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR); spinlock_t lock; + wait_queue_head_t tcs_wait; struct rpmh_ctrlr client; }; diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index ae6675782581..a297911afe57 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -19,6 +19,7 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> +#include <linux/wait.h> #include <soc/qcom/cmd-db.h> #include <soc/qcom/tcs.h> @@ -453,6 +454,7 @@ skip: if (!drv->tcs[ACTIVE_TCS].num_tcs) enable_tcs_irq(drv, i, false); spin_unlock(&drv->lock); + wake_up(&drv->tcs_wait); if (req) rpmh_tx_done(req, err); } @@ -571,73 +573,34 @@ static int find_free_tcs(struct tcs_group *tcs) } /** - * tcs_write() - Store messages into a TCS right now, or return -EBUSY. + * claim_tcs_for_req() - Claim a tcs in the given tcs_group; only for active. * @drv: The controller. + * @tcs: The tcs_group used for ACTIVE_ONLY transfers. * @msg: The data to be sent. * - * Grabs a TCS for ACTIVE_ONLY transfers and writes the messages to it. + * Claims a tcs in the given tcs_group while making sure that no existing cmd + * is in flight that would conflict with the one in @msg. * - * If there are no free TCSes for ACTIVE_ONLY transfers or if a command for - * the same address is already transferring returns -EBUSY which means the - * client should retry shortly. + * Context: Must be called with the drv->lock held since that protects + * tcs_in_use. * - * Return: 0 on success, -EBUSY if client should retry, or an error. - * Client should have interrupts enabled for a bit before retrying. + * Return: The id of the claimed tcs or -EBUSY if a matching msg is in flight + * or the tcs_group is full. */ -static int tcs_write(struct rsc_drv *drv, const struct tcs_request *msg) +static int claim_tcs_for_req(struct rsc_drv *drv, struct tcs_group *tcs, + const struct tcs_request *msg) { - struct tcs_group *tcs; - int tcs_id; - unsigned long flags; int ret; - tcs = get_tcs_for_msg(drv, msg); - if (IS_ERR(tcs)) - return PTR_ERR(tcs); - - spin_lock_irqsave(&drv->lock, flags); /* * The h/w does not like if we send a request to the same address, * when one is already in-flight or being processed. */ ret = check_for_req_inflight(drv, tcs, msg); if (ret) - goto unlock; - - ret = find_free_tcs(tcs); - if (ret < 0) - goto unlock; - tcs_id = ret; - - tcs->req[tcs_id - tcs->offset] = msg; - set_bit(tcs_id, drv->tcs_in_use); - if (msg->state == RPMH_ACTIVE_ONLY_STATE && tcs->type != ACTIVE_TCS) { - /* - * Clear previously programmed WAKE commands in selected - * repurposed TCS to avoid triggering them. tcs->slots will be - * cleaned from rpmh_flush() by invoking rpmh_rsc_invalidate() - */ - write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, tcs_id, 0); - write_tcs_reg_sync(drv, RSC_DRV_CMD_WAIT_FOR_CMPL, tcs_id, 0); - enable_tcs_irq(drv, tcs_id, true); - } - spin_unlock_irqrestore(&drv->lock, flags); - - /* - * These two can be done after the lock is released because: - * - We marked "tcs_in_use" under lock. - * - Once "tcs_in_use" has been marked nobody else could be writing - * to these registers until the interrupt goes off. - * - The interrupt can't go off until we trigger w/ the last line - * of __tcs_set_trigger() below. - */ - __tcs_buffer_write(drv, tcs_id, 0, msg); - __tcs_set_trigger(drv, tcs_id, true); + return ret; - return 0; -unlock: - spin_unlock_irqrestore(&drv->lock, flags); - return ret; + return find_free_tcs(tcs); } /** @@ -664,18 +627,47 @@ unlock: */ int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg) { - int ret; + struct tcs_group *tcs; + int tcs_id; + unsigned long flags; - do { - ret = tcs_write(drv, msg); - if (ret == -EBUSY) { - pr_info_ratelimited("TCS Busy, retrying RPMH message send: addr=%#x\n", - msg->cmds[0].addr); - udelay(10); - } - } while (ret == -EBUSY); + tcs = get_tcs_for_msg(drv, msg); + if (IS_ERR(tcs)) + return PTR_ERR(tcs); - return ret; + spin_lock_irqsave(&drv->lock, flags); + + /* Wait forever for a free tcs. It better be there eventually! */ + wait_event_lock_irq(drv->tcs_wait, + (tcs_id = claim_tcs_for_req(drv, tcs, msg)) >= 0, + drv->lock); + + tcs->req[tcs_id - tcs->offset] = msg; + set_bit(tcs_id, drv->tcs_in_use); + if (msg->state == RPMH_ACTIVE_ONLY_STATE && tcs->type != ACTIVE_TCS) { + /* + * Clear previously programmed WAKE commands in selected + * repurposed TCS to avoid triggering them. tcs->slots will be + * cleaned from rpmh_flush() by invoking rpmh_rsc_invalidate() + */ + write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, tcs_id, 0); + write_tcs_reg_sync(drv, RSC_DRV_CMD_WAIT_FOR_CMPL, tcs_id, 0); + enable_tcs_irq(drv, tcs_id, true); + } + spin_unlock_irqrestore(&drv->lock, flags); + + /* + * These two can be done after the lock is released because: + * - We marked "tcs_in_use" under lock. + * - Once "tcs_in_use" has been marked nobody else could be writing + * to these registers until the interrupt goes off. + * - The interrupt can't go off until we trigger w/ the last line + * of __tcs_set_trigger() below. + */ + __tcs_buffer_write(drv, tcs_id, 0, msg); + __tcs_set_trigger(drv, tcs_id, true); + + return 0; } /** @@ -983,6 +975,7 @@ static int rpmh_rsc_probe(struct platform_device *pdev) return ret; spin_lock_init(&drv->lock); + init_waitqueue_head(&drv->tcs_wait); bitmap_zero(drv->tcs_in_use, MAX_TCS_NR); irq = platform_get_irq(pdev, drv->id); diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c index b25d0f7dac9e..b44ede48decc 100644 --- a/drivers/soc/qcom/socinfo.c +++ b/drivers/soc/qcom/socinfo.c @@ -194,6 +194,7 @@ static const struct soc_id soc_id[] = { { 186, "MSM8674" }, { 194, "MSM8974PRO" }, { 206, "MSM8916" }, + { 207, "MSM8994" }, { 208, "APQ8074-AA" }, { 209, "APQ8074-AB" }, { 210, "APQ8074PRO" }, @@ -214,6 +215,8 @@ static const struct soc_id soc_id[] = { { 248, "MSM8216" }, { 249, "MSM8116" }, { 250, "MSM8616" }, + { 251, "MSM8992" }, + { 253, "APQ8094" }, { 291, "APQ8096" }, { 305, "MSM8996SG" }, { 310, "MSM8996AU" }, @@ -223,6 +226,8 @@ static const struct soc_id soc_id[] = { { 321, "SDM845" }, { 341, "SDA845" }, { 356, "SM8250" }, + { 402, "IPQ6018" }, + { 425, "SC7180" }, }; static const char *socinfo_machine(struct device *dev, unsigned int id) diff --git a/drivers/soc/renesas/Kconfig b/drivers/soc/renesas/Kconfig index 30984659df90..b70bbc38efc6 100644 --- a/drivers/soc/renesas/Kconfig +++ b/drivers/soc/renesas/Kconfig @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -config SOC_RENESAS +menuconfig SOC_RENESAS bool "Renesas SoC driver support" if COMPILE_TEST && !ARCH_RENESAS default y if ARCH_RENESAS select SOC_BUS @@ -49,126 +49,126 @@ if ARM && ARCH_RENESAS #comment "Renesas ARM SoCs System Type" config ARCH_EMEV2 - bool "Emma Mobile EV2" + bool "ARM32 Platform support for Emma Mobile EV2" select HAVE_ARM_SCU if SMP select SYS_SUPPORTS_EM_STI -config ARCH_R7S72100 - bool "RZ/A1H (R7S72100)" - select ARM_ERRATA_754322 - select PM - select PM_GENERIC_DOMAINS - select RENESAS_OSTM - select RENESAS_RZA1_IRQC - select SYS_SUPPORTS_SH_MTU2 +config ARCH_R8A7794 + bool "ARM32 Platform support for R-Car E2" + select ARCH_RCAR_GEN2 + select ARM_ERRATA_814220 + select SYSC_R8A7794 -config ARCH_R7S9210 - bool "RZ/A2 (R7S9210)" - select PM - select PM_GENERIC_DOMAINS - select RENESAS_OSTM - select RENESAS_RZA1_IRQC +config ARCH_R8A7779 + bool "ARM32 Platform support for R-Car H1" + select ARCH_RCAR_GEN1 + select ARM_ERRATA_754322 + select ARM_GLOBAL_TIMER + select HAVE_ARM_SCU if SMP + select HAVE_ARM_TWD if SMP + select SYSC_R8A7779 -config ARCH_R8A73A4 - bool "R-Mobile APE6 (R8A73A40)" - select ARCH_RMOBILE +config ARCH_R8A7790 + bool "ARM32 Platform support for R-Car H2" + select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP select ARM_ERRATA_814220 - select HAVE_ARM_ARCH_TIMER - select RENESAS_IRQC + select I2C + select SYSC_R8A7790 -config ARCH_R8A7740 - bool "R-Mobile A1 (R8A77400)" - select ARCH_RMOBILE +config ARCH_R8A7778 + bool "ARM32 Platform support for R-Car M1A" + select ARCH_RCAR_GEN1 select ARM_ERRATA_754322 - select RENESAS_INTC_IRQPIN -config ARCH_R8A7742 - bool "RZ/G1H (R8A77420)" +config ARCH_R8A7793 + bool "ARM32 Platform support for R-Car M2-N" select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP - select ARM_ERRATA_814220 - select SYSC_R8A7742 + select I2C + select SYSC_R8A7791 -config ARCH_R8A7743 - bool "RZ/G1M (R8A77430)" +config ARCH_R8A7791 + bool "ARM32 Platform support for R-Car M2-W" select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP - select SYSC_R8A7743 + select I2C + select SYSC_R8A7791 -config ARCH_R8A7744 - bool "RZ/G1N (R8A77440)" +config ARCH_R8A7792 + bool "ARM32 Platform support for R-Car V2H" select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP - select SYSC_R8A7743 + select SYSC_R8A7792 -config ARCH_R8A7745 - bool "RZ/G1E (R8A77450)" - select ARCH_RCAR_GEN2 - select ARM_ERRATA_814220 - select SYSC_R8A7745 +config ARCH_R8A7740 + bool "ARM32 Platform support for R-Mobile A1" + select ARCH_RMOBILE + select ARM_ERRATA_754322 + select RENESAS_INTC_IRQPIN -config ARCH_R8A77470 - bool "RZ/G1C (R8A77470)" - select ARCH_RCAR_GEN2 +config ARCH_R8A73A4 + bool "ARM32 Platform support for R-Mobile APE6" + select ARCH_RMOBILE + select ARM_ERRATA_798181 if SMP select ARM_ERRATA_814220 - select SYSC_R8A77470 + select HAVE_ARM_ARCH_TIMER + select RENESAS_IRQC -config ARCH_R8A7778 - bool "R-Car M1A (R8A77781)" - select ARCH_RCAR_GEN1 +config ARCH_R7S72100 + bool "ARM32 Platform support for RZ/A1H" select ARM_ERRATA_754322 + select PM + select PM_GENERIC_DOMAINS + select RENESAS_OSTM + select RENESAS_RZA1_IRQC + select SYS_SUPPORTS_SH_MTU2 -config ARCH_R8A7779 - bool "R-Car H1 (R8A77790)" - select ARCH_RCAR_GEN1 - select ARM_ERRATA_754322 - select ARM_GLOBAL_TIMER - select HAVE_ARM_SCU if SMP - select HAVE_ARM_TWD if SMP - select SYSC_R8A7779 +config ARCH_R7S9210 + bool "ARM32 Platform support for RZ/A2" + select PM + select PM_GENERIC_DOMAINS + select RENESAS_OSTM + select RENESAS_RZA1_IRQC -config ARCH_R8A7790 - bool "R-Car H2 (R8A77900)" +config ARCH_R8A77470 + bool "ARM32 Platform support for RZ/G1C" select ARCH_RCAR_GEN2 - select ARM_ERRATA_798181 if SMP select ARM_ERRATA_814220 - select I2C - select SYSC_R8A7790 + select SYSC_R8A77470 -config ARCH_R8A7791 - bool "R-Car M2-W (R8A77910)" +config ARCH_R8A7745 + bool "ARM32 Platform support for RZ/G1E" select ARCH_RCAR_GEN2 - select ARM_ERRATA_798181 if SMP - select I2C - select SYSC_R8A7791 + select ARM_ERRATA_814220 + select SYSC_R8A7745 -config ARCH_R8A7792 - bool "R-Car V2H (R8A77920)" +config ARCH_R8A7742 + bool "ARM32 Platform support for RZ/G1H" select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP - select SYSC_R8A7792 + select ARM_ERRATA_814220 + select SYSC_R8A7742 -config ARCH_R8A7793 - bool "R-Car M2-N (R8A7793)" +config ARCH_R8A7743 + bool "ARM32 Platform support for RZ/G1M" select ARCH_RCAR_GEN2 select ARM_ERRATA_798181 if SMP - select I2C - select SYSC_R8A7791 + select SYSC_R8A7743 -config ARCH_R8A7794 - bool "R-Car E2 (R8A77940)" +config ARCH_R8A7744 + bool "ARM32 Platform support for RZ/G1N" select ARCH_RCAR_GEN2 - select ARM_ERRATA_814220 - select SYSC_R8A7794 + select ARM_ERRATA_798181 if SMP + select SYSC_R8A7743 config ARCH_R9A06G032 - bool "RZ/N1D (R9A06G032)" + bool "ARM32 Platform support for RZ/N1D" select ARCH_RZN1 select ARM_ERRATA_814220 config ARCH_SH73A0 - bool "SH-Mobile AG5 (R8A73A00)" + bool "ARM32 Platform support for SH-Mobile AG5" select ARCH_RMOBILE select ARM_ERRATA_754322 select ARM_GLOBAL_TIMER @@ -180,193 +180,201 @@ endif # ARM if ARM64 -config ARCH_R8A774A1 - bool "Renesas RZ/G2M SoC Platform" - select ARCH_RCAR_GEN3 - select SYSC_R8A774A1 - help - This enables support for the Renesas RZ/G2M SoC. - -config ARCH_R8A774B1 - bool "Renesas RZ/G2N SoC Platform" - select ARCH_RCAR_GEN3 - select SYSC_R8A774B1 - help - This enables support for the Renesas RZ/G2N SoC. - -config ARCH_R8A774C0 - bool "Renesas RZ/G2E SoC Platform" +config ARCH_R8A77995 + bool "ARM64 Platform support for R-Car D3" select ARCH_RCAR_GEN3 - select SYSC_R8A774C0 + select SYSC_R8A77995 help - This enables support for the Renesas RZ/G2E SoC. + This enables support for the Renesas R-Car D3 SoC. -config ARCH_R8A774E1 - bool "Renesas RZ/G2H SoC Platform" +config ARCH_R8A77990 + bool "ARM64 Platform support for R-Car E3" select ARCH_RCAR_GEN3 - select SYSC_R8A774E1 + select SYSC_R8A77990 help - This enables support for the Renesas RZ/G2H SoC. + This enables support for the Renesas R-Car E3 SoC. config ARCH_R8A77950 - bool "Renesas R-Car H3 ES1.x SoC Platform" + bool "ARM64 Platform support for R-Car H3 ES1.x" select ARCH_RCAR_GEN3 select SYSC_R8A7795 help This enables support for the Renesas R-Car H3 SoC (revision 1.x). config ARCH_R8A77951 - bool "Renesas R-Car H3 ES2.0+ SoC Platform" + bool "ARM64 Platform support for R-Car H3 ES2.0+" select ARCH_RCAR_GEN3 select SYSC_R8A7795 help This enables support for the Renesas R-Car H3 SoC (revisions 2.0 and later). +config ARCH_R8A77965 + bool "ARM64 Platform support for R-Car M3-N" + select ARCH_RCAR_GEN3 + select SYSC_R8A77965 + help + This enables support for the Renesas R-Car M3-N SoC. + config ARCH_R8A77960 - bool "Renesas R-Car M3-W SoC Platform" + bool "ARM64 Platform support for R-Car M3-W" select ARCH_RCAR_GEN3 select SYSC_R8A77960 help This enables support for the Renesas R-Car M3-W SoC. config ARCH_R8A77961 - bool "Renesas R-Car M3-W+ SoC Platform" + bool "ARM64 Platform support for R-Car M3-W+" select ARCH_RCAR_GEN3 select SYSC_R8A77961 help This enables support for the Renesas R-Car M3-W+ SoC. -config ARCH_R8A77965 - bool "Renesas R-Car M3-N SoC Platform" +config ARCH_R8A77980 + bool "ARM64 Platform support for R-Car V3H" select ARCH_RCAR_GEN3 - select SYSC_R8A77965 + select SYSC_R8A77980 help - This enables support for the Renesas R-Car M3-N SoC. + This enables support for the Renesas R-Car V3H SoC. config ARCH_R8A77970 - bool "Renesas R-Car V3M SoC Platform" + bool "ARM64 Platform support for R-Car V3M" select ARCH_RCAR_GEN3 select SYSC_R8A77970 help This enables support for the Renesas R-Car V3M SoC. -config ARCH_R8A77980 - bool "Renesas R-Car V3H SoC Platform" +config ARCH_R8A779A0 + bool "ARM64 Platform support for R-Car V3U" select ARCH_RCAR_GEN3 - select SYSC_R8A77980 + select SYSC_R8A779A0 help - This enables support for the Renesas R-Car V3H SoC. + This enables support for the Renesas R-Car V3U SoC. -config ARCH_R8A77990 - bool "Renesas R-Car E3 SoC Platform" +config ARCH_R8A774C0 + bool "ARM64 Platform support for RZ/G2E" select ARCH_RCAR_GEN3 - select SYSC_R8A77990 + select SYSC_R8A774C0 help - This enables support for the Renesas R-Car E3 SoC. + This enables support for the Renesas RZ/G2E SoC. -config ARCH_R8A77995 - bool "Renesas R-Car D3 SoC Platform" +config ARCH_R8A774E1 + bool "ARM64 Platform support for RZ/G2H" select ARCH_RCAR_GEN3 - select SYSC_R8A77995 + select SYSC_R8A774E1 help - This enables support for the Renesas R-Car D3 SoC. + This enables support for the Renesas RZ/G2H SoC. + +config ARCH_R8A774A1 + bool "ARM64 Platform support for RZ/G2M" + select ARCH_RCAR_GEN3 + select SYSC_R8A774A1 + help + This enables support for the Renesas RZ/G2M SoC. + +config ARCH_R8A774B1 + bool "ARM64 Platform support for RZ/G2N" + select ARCH_RCAR_GEN3 + select SYSC_R8A774B1 + help + This enables support for the Renesas RZ/G2N SoC. endif # ARM64 -# SoC -config SYSC_R8A7742 - bool "RZ/G1H System Controller support" if COMPILE_TEST - select SYSC_RCAR +config RST_RCAR + bool "Reset Controller support for R-Car" if COMPILE_TEST -config SYSC_R8A7743 - bool "RZ/G1M System Controller support" if COMPILE_TEST +config SYSC_RCAR + bool "System Controller support for R-Car" if COMPILE_TEST + +config SYSC_R8A77995 + bool "System Controller support for R-Car D3" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7745 - bool "RZ/G1E System Controller support" if COMPILE_TEST +config SYSC_R8A7794 + bool "System Controller support for R-Car E2" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77470 - bool "RZ/G1C System Controller support" if COMPILE_TEST +config SYSC_R8A77990 + bool "System Controller support for R-Car E3" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A774A1 - bool "RZ/G2M System Controller support" if COMPILE_TEST +config SYSC_R8A7779 + bool "System Controller support for R-Car H1" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A774B1 - bool "RZ/G2N System Controller support" if COMPILE_TEST +config SYSC_R8A7790 + bool "System Controller support for R-Car H2" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A774C0 - bool "RZ/G2E System Controller support" if COMPILE_TEST +config SYSC_R8A7795 + bool "System Controller support for R-Car H3" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A774E1 - bool "RZ/G2H System Controller support" if COMPILE_TEST +config SYSC_R8A7791 + bool "System Controller support for R-Car M2-W/N" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7779 - bool "R-Car H1 System Controller support" if COMPILE_TEST +config SYSC_R8A77965 + bool "System Controller support for R-Car M3-N" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7790 - bool "R-Car H2 System Controller support" if COMPILE_TEST +config SYSC_R8A77960 + bool "System Controller support for R-Car M3-W" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7791 - bool "R-Car M2-W/N System Controller support" if COMPILE_TEST +config SYSC_R8A77961 + bool "System Controller support for R-Car M3-W+" if COMPILE_TEST select SYSC_RCAR config SYSC_R8A7792 - bool "R-Car V2H System Controller support" if COMPILE_TEST + bool "System Controller support for R-Car V2H" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7794 - bool "R-Car E2 System Controller support" if COMPILE_TEST +config SYSC_R8A77980 + bool "System Controller support for R-Car V3H" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A7795 - bool "R-Car H3 System Controller support" if COMPILE_TEST +config SYSC_R8A77970 + bool "System Controller support for R-Car V3M" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77960 - bool "R-Car M3-W System Controller support" if COMPILE_TEST - select SYSC_RCAR +config SYSC_R8A779A0 + bool "System Controller support for R-Car V3U" if COMPILE_TEST -config SYSC_R8A77961 - bool "R-Car M3-W+ System Controller support" if COMPILE_TEST - select SYSC_RCAR +config SYSC_RMOBILE + bool "System Controller support for R-Mobile" if COMPILE_TEST -config SYSC_R8A77965 - bool "R-Car M3-N System Controller support" if COMPILE_TEST +config SYSC_R8A77470 + bool "System Controller support for RZ/G1C" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77970 - bool "R-Car V3M System Controller support" if COMPILE_TEST +config SYSC_R8A7745 + bool "System Controller support for RZ/G1E" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77980 - bool "R-Car V3H System Controller support" if COMPILE_TEST +config SYSC_R8A7742 + bool "System Controller support for RZ/G1H" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77990 - bool "R-Car E3 System Controller support" if COMPILE_TEST +config SYSC_R8A7743 + bool "System Controller support for RZ/G1M" if COMPILE_TEST select SYSC_RCAR -config SYSC_R8A77995 - bool "R-Car D3 System Controller support" if COMPILE_TEST +config SYSC_R8A774C0 + bool "System Controller support for RZ/G2E" if COMPILE_TEST select SYSC_RCAR -# Family -config RST_RCAR - bool "R-Car Reset Controller support" if COMPILE_TEST +config SYSC_R8A774E1 + bool "System Controller support for RZ/G2H" if COMPILE_TEST + select SYSC_RCAR -config SYSC_RCAR - bool "R-Car System Controller support" if COMPILE_TEST +config SYSC_R8A774A1 + bool "System Controller support for RZ/G2M" if COMPILE_TEST + select SYSC_RCAR -config SYSC_RMOBILE - bool "R-Mobile System Controller support" if COMPILE_TEST +config SYSC_R8A774B1 + bool "System Controller support for RZ/G2N" if COMPILE_TEST + select SYSC_RCAR endif # SOC_RENESAS diff --git a/drivers/soc/renesas/Makefile b/drivers/soc/renesas/Makefile index 10a399fc486a..9b29bed2a597 100644 --- a/drivers/soc/renesas/Makefile +++ b/drivers/soc/renesas/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_SYSC_R8A77970) += r8a77970-sysc.o obj-$(CONFIG_SYSC_R8A77980) += r8a77980-sysc.o obj-$(CONFIG_SYSC_R8A77990) += r8a77990-sysc.o obj-$(CONFIG_SYSC_R8A77995) += r8a77995-sysc.o +obj-$(CONFIG_SYSC_R8A779A0) += r8a779a0-sysc.o ifdef CONFIG_SMP obj-$(CONFIG_ARCH_R9A06G032) += r9a06g032-smp.o endif diff --git a/drivers/soc/renesas/r8a779a0-sysc.c b/drivers/soc/renesas/r8a779a0-sysc.c new file mode 100644 index 000000000000..d464ffa1be33 --- /dev/null +++ b/drivers/soc/renesas/r8a779a0-sysc.c @@ -0,0 +1,448 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas R-Car V3U System Controller + * + * Copyright (C) 2020 Renesas Electronics Corp. + */ + +#include <linux/bits.h> +#include <linux/clk/renesas.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/of_address.h> +#include <linux/pm_domain.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/types.h> + +#include <dt-bindings/power/r8a779a0-sysc.h> + +/* + * Power Domain flags + */ +#define PD_CPU BIT(0) /* Area contains main CPU core */ +#define PD_SCU BIT(1) /* Area contains SCU and L2 cache */ +#define PD_NO_CR BIT(2) /* Area lacks PWR{ON,OFF}CR registers */ + +#define PD_CPU_NOCR PD_CPU | PD_NO_CR /* CPU area lacks CR */ +#define PD_ALWAYS_ON PD_NO_CR /* Always-on area */ + +/* + * Description of a Power Area + */ +struct r8a779a0_sysc_area { + const char *name; + u8 pdr; /* PDRn */ + int parent; /* -1 if none */ + unsigned int flags; /* See PD_* */ +}; + +/* + * SoC-specific Power Area Description + */ +struct r8a779a0_sysc_info { + const struct r8a779a0_sysc_area *areas; + unsigned int num_areas; +}; + +static struct r8a779a0_sysc_area r8a779a0_areas[] __initdata = { + { "always-on", R8A779A0_PD_ALWAYS_ON, -1, PD_ALWAYS_ON }, + { "a3e0", R8A779A0_PD_A3E0, R8A779A0_PD_ALWAYS_ON, PD_SCU }, + { "a3e1", R8A779A0_PD_A3E1, R8A779A0_PD_ALWAYS_ON, PD_SCU }, + { "a2e0d0", R8A779A0_PD_A2E0D0, R8A779A0_PD_A3E0, PD_SCU }, + { "a2e0d1", R8A779A0_PD_A2E0D1, R8A779A0_PD_A3E0, PD_SCU }, + { "a2e1d0", R8A779A0_PD_A2E1D0, R8A779A0_PD_A3E1, PD_SCU }, + { "a2e1d1", R8A779A0_PD_A2E1D1, R8A779A0_PD_A3E1, PD_SCU }, + { "a1e0d0c0", R8A779A0_PD_A1E0D0C0, R8A779A0_PD_A2E0D0, PD_CPU_NOCR }, + { "a1e0d0c1", R8A779A0_PD_A1E0D0C1, R8A779A0_PD_A2E0D0, PD_CPU_NOCR }, + { "a1e0d1c0", R8A779A0_PD_A1E0D1C0, R8A779A0_PD_A2E0D1, PD_CPU_NOCR }, + { "a1e0d1c1", R8A779A0_PD_A1E0D1C1, R8A779A0_PD_A2E0D1, PD_CPU_NOCR }, + { "a1e1d0c0", R8A779A0_PD_A1E1D0C0, R8A779A0_PD_A2E1D0, PD_CPU_NOCR }, + { "a1e1d0c1", R8A779A0_PD_A1E1D0C1, R8A779A0_PD_A2E1D0, PD_CPU_NOCR }, + { "a1e1d1c0", R8A779A0_PD_A1E1D1C0, R8A779A0_PD_A2E1D1, PD_CPU_NOCR }, + { "a1e1d1c1", R8A779A0_PD_A1E1D1C1, R8A779A0_PD_A2E1D1, PD_CPU_NOCR }, + { "3dg-a", R8A779A0_PD_3DG_A, R8A779A0_PD_ALWAYS_ON }, + { "3dg-b", R8A779A0_PD_3DG_B, R8A779A0_PD_3DG_A }, + { "a3vip0", R8A779A0_PD_A3VIP0, R8A779A0_PD_ALWAYS_ON }, + { "a3vip1", R8A779A0_PD_A3VIP1, R8A779A0_PD_ALWAYS_ON }, + { "a3vip3", R8A779A0_PD_A3VIP3, R8A779A0_PD_ALWAYS_ON }, + { "a3vip2", R8A779A0_PD_A3VIP2, R8A779A0_PD_ALWAYS_ON }, + { "a3isp01", R8A779A0_PD_A3ISP01, R8A779A0_PD_ALWAYS_ON }, + { "a3isp23", R8A779A0_PD_A3ISP23, R8A779A0_PD_ALWAYS_ON }, + { "a3ir", R8A779A0_PD_A3IR, R8A779A0_PD_ALWAYS_ON }, + { "a2cn0", R8A779A0_PD_A2CN0, R8A779A0_PD_A3IR }, + { "a2imp01", R8A779A0_PD_A2IMP01, R8A779A0_PD_A3IR }, + { "a2dp0", R8A779A0_PD_A2DP0, R8A779A0_PD_A3IR }, + { "a2cv0", R8A779A0_PD_A2CV0, R8A779A0_PD_A3IR }, + { "a2cv1", R8A779A0_PD_A2CV1, R8A779A0_PD_A3IR }, + { "a2cv4", R8A779A0_PD_A2CV4, R8A779A0_PD_A3IR }, + { "a2cv6", R8A779A0_PD_A2CV6, R8A779A0_PD_A3IR }, + { "a2cn2", R8A779A0_PD_A2CN2, R8A779A0_PD_A3IR }, + { "a2imp23", R8A779A0_PD_A2IMP23, R8A779A0_PD_A3IR }, + { "a2dp1", R8A779A0_PD_A2DP0, R8A779A0_PD_A3IR }, + { "a2cv2", R8A779A0_PD_A2CV0, R8A779A0_PD_A3IR }, + { "a2cv3", R8A779A0_PD_A2CV1, R8A779A0_PD_A3IR }, + { "a2cv5", R8A779A0_PD_A2CV4, R8A779A0_PD_A3IR }, + { "a2cv7", R8A779A0_PD_A2CV6, R8A779A0_PD_A3IR }, + { "a2cn1", R8A779A0_PD_A2CN1, R8A779A0_PD_A3IR }, + { "a1cnn0", R8A779A0_PD_A1CNN0, R8A779A0_PD_A2CN0 }, + { "a1cnn2", R8A779A0_PD_A1CNN2, R8A779A0_PD_A2CN2 }, + { "a1dsp0", R8A779A0_PD_A1DSP0, R8A779A0_PD_A2CN2 }, + { "a1cnn1", R8A779A0_PD_A1CNN1, R8A779A0_PD_A2CN1 }, + { "a1dsp1", R8A779A0_PD_A1DSP1, R8A779A0_PD_A2CN1 }, +}; + +static const struct r8a779a0_sysc_info r8a779a0_sysc_info __initconst = { + .areas = r8a779a0_areas, + .num_areas = ARRAY_SIZE(r8a779a0_areas), +}; + +/* SYSC Common */ +#define SYSCSR 0x000 /* SYSC Status Register */ +#define SYSCPONSR(x) (0x800 + ((x) * 0x4)) /* Power-ON Status Register 0 */ +#define SYSCPOFFSR(x) (0x808 + ((x) * 0x4)) /* Power-OFF Status Register */ +#define SYSCISCR(x) (0x810 + ((x) * 0x4)) /* Interrupt Status/Clear Register */ +#define SYSCIER(x) (0x820 + ((x) * 0x4)) /* Interrupt Enable Register */ +#define SYSCIMR(x) (0x830 + ((x) * 0x4)) /* Interrupt Mask Register */ + +/* Power Domain Registers */ +#define PDRSR(n) (0x1000 + ((n) * 0x40)) +#define PDRONCR(n) (0x1004 + ((n) * 0x40)) +#define PDROFFCR(n) (0x1008 + ((n) * 0x40)) +#define PDRESR(n) (0x100C + ((n) * 0x40)) + +/* PWRON/PWROFF */ +#define PWRON_PWROFF BIT(0) /* Power-ON/OFF request */ + +/* PDRESR */ +#define PDRESR_ERR BIT(0) + +/* PDRSR */ +#define PDRSR_OFF BIT(0) /* Power-OFF state */ +#define PDRSR_ON BIT(4) /* Power-ON state */ +#define PDRSR_OFF_STATE BIT(8) /* Processing Power-OFF sequence */ +#define PDRSR_ON_STATE BIT(12) /* Processing Power-ON sequence */ + +#define SYSCSR_BUSY GENMASK(1, 0) /* All bit sets is not busy */ + +#define SYSCSR_TIMEOUT 10000 +#define SYSCSR_DELAY_US 10 + +#define PDRESR_RETRIES 1000 +#define PDRESR_DELAY_US 10 + +#define SYSCISR_TIMEOUT 10000 +#define SYSCISR_DELAY_US 10 + +#define NUM_DOMAINS_EACH_REG BITS_PER_TYPE(u32) + +static void __iomem *r8a779a0_sysc_base; +static DEFINE_SPINLOCK(r8a779a0_sysc_lock); /* SMP CPUs + I/O devices */ + +static int r8a779a0_sysc_pwr_on_off(u8 pdr, bool on) +{ + unsigned int reg_offs; + u32 val; + int ret; + + if (on) + reg_offs = PDRONCR(pdr); + else + reg_offs = PDROFFCR(pdr); + + /* Wait until SYSC is ready to accept a power request */ + ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCSR, val, + (val & SYSCSR_BUSY) == SYSCSR_BUSY, + SYSCSR_DELAY_US, SYSCSR_TIMEOUT); + if (ret < 0) + return -EAGAIN; + + /* Submit power shutoff or power resume request */ + iowrite32(PWRON_PWROFF, r8a779a0_sysc_base + reg_offs); + + return 0; +} + +static int clear_irq_flags(unsigned int reg_idx, unsigned int isr_mask) +{ + u32 val; + int ret; + + iowrite32(isr_mask, r8a779a0_sysc_base + SYSCISCR(reg_idx)); + + ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCISCR(reg_idx), + val, !(val & isr_mask), + SYSCISR_DELAY_US, SYSCISR_TIMEOUT); + if (ret < 0) { + pr_err("\n %s : Can not clear IRQ flags in SYSCISCR", __func__); + return -EIO; + } + + return 0; +} + +static int r8a779a0_sysc_power(u8 pdr, bool on) +{ + unsigned int isr_mask; + unsigned int reg_idx, bit_idx; + unsigned int status; + unsigned long flags; + int ret = 0; + u32 val; + int k; + + spin_lock_irqsave(&r8a779a0_sysc_lock, flags); + + reg_idx = pdr / NUM_DOMAINS_EACH_REG; + bit_idx = pdr % NUM_DOMAINS_EACH_REG; + + isr_mask = BIT(bit_idx); + + /* + * The interrupt source needs to be enabled, but masked, to prevent the + * CPU from receiving it. + */ + iowrite32(ioread32(r8a779a0_sysc_base + SYSCIER(reg_idx)) | isr_mask, + r8a779a0_sysc_base + SYSCIER(reg_idx)); + iowrite32(ioread32(r8a779a0_sysc_base + SYSCIMR(reg_idx)) | isr_mask, + r8a779a0_sysc_base + SYSCIMR(reg_idx)); + + ret = clear_irq_flags(reg_idx, isr_mask); + if (ret) + goto out; + + /* Submit power shutoff or resume request until it was accepted */ + for (k = 0; k < PDRESR_RETRIES; k++) { + ret = r8a779a0_sysc_pwr_on_off(pdr, on); + if (ret) + goto out; + + status = ioread32(r8a779a0_sysc_base + PDRESR(pdr)); + if (!(status & PDRESR_ERR)) + break; + + udelay(PDRESR_DELAY_US); + } + + if (k == PDRESR_RETRIES) { + ret = -EIO; + goto out; + } + + /* Wait until the power shutoff or resume request has completed * */ + ret = readl_poll_timeout_atomic(r8a779a0_sysc_base + SYSCISCR(reg_idx), + val, (val & isr_mask), + SYSCISR_DELAY_US, SYSCISR_TIMEOUT); + if (ret < 0) { + ret = -EIO; + goto out; + } + + /* Clear interrupt flags */ + ret = clear_irq_flags(reg_idx, isr_mask); + if (ret) + goto out; + + out: + spin_unlock_irqrestore(&r8a779a0_sysc_lock, flags); + + pr_debug("sysc power %s domain %d: %08x -> %d\n", on ? "on" : "off", + pdr, ioread32(r8a779a0_sysc_base + SYSCISCR(reg_idx)), ret); + return ret; +} + +static bool r8a779a0_sysc_power_is_off(u8 pdr) +{ + unsigned int st; + + st = ioread32(r8a779a0_sysc_base + PDRSR(pdr)); + + if (st & PDRSR_OFF) + return true; + + return false; +} + +struct r8a779a0_sysc_pd { + struct generic_pm_domain genpd; + u8 pdr; + unsigned int flags; + char name[]; +}; + +static inline struct r8a779a0_sysc_pd *to_r8a779a0_pd(struct generic_pm_domain *d) +{ + return container_of(d, struct r8a779a0_sysc_pd, genpd); +} + +static int r8a779a0_sysc_pd_power_off(struct generic_pm_domain *genpd) +{ + struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd); + + pr_debug("%s: %s\n", __func__, genpd->name); + return r8a779a0_sysc_power(pd->pdr, false); +} + +static int r8a779a0_sysc_pd_power_on(struct generic_pm_domain *genpd) +{ + struct r8a779a0_sysc_pd *pd = to_r8a779a0_pd(genpd); + + pr_debug("%s: %s\n", __func__, genpd->name); + return r8a779a0_sysc_power(pd->pdr, true); +} + +static int __init r8a779a0_sysc_pd_setup(struct r8a779a0_sysc_pd *pd) +{ + struct generic_pm_domain *genpd = &pd->genpd; + const char *name = pd->genpd.name; + int error; + + if (pd->flags & PD_CPU) { + /* + * This domain contains a CPU core and therefore it should + * only be turned off if the CPU is not in use. + */ + pr_debug("PM domain %s contains %s\n", name, "CPU"); + genpd->flags |= GENPD_FLAG_ALWAYS_ON; + } else if (pd->flags & PD_SCU) { + /* + * This domain contains an SCU and cache-controller, and + * therefore it should only be turned off if the CPU cores are + * not in use. + */ + pr_debug("PM domain %s contains %s\n", name, "SCU"); + genpd->flags |= GENPD_FLAG_ALWAYS_ON; + } else if (pd->flags & PD_NO_CR) { + /* + * This domain cannot be turned off. + */ + genpd->flags |= GENPD_FLAG_ALWAYS_ON; + } + + if (!(pd->flags & (PD_CPU | PD_SCU))) { + /* Enable Clock Domain for I/O devices */ + genpd->flags |= GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP; + genpd->attach_dev = cpg_mssr_attach_dev; + genpd->detach_dev = cpg_mssr_detach_dev; + } + + genpd->power_off = r8a779a0_sysc_pd_power_off; + genpd->power_on = r8a779a0_sysc_pd_power_on; + + if (pd->flags & (PD_CPU | PD_NO_CR)) { + /* Skip CPUs (handled by SMP code) and areas without control */ + pr_debug("%s: Not touching %s\n", __func__, genpd->name); + goto finalize; + } + + if (!r8a779a0_sysc_power_is_off(pd->pdr)) { + pr_debug("%s: %s is already powered\n", __func__, genpd->name); + goto finalize; + } + + r8a779a0_sysc_power(pd->pdr, true); + +finalize: + error = pm_genpd_init(genpd, &simple_qos_governor, false); + if (error) + pr_err("Failed to init PM domain %s: %d\n", name, error); + + return error; +} + +static const struct of_device_id r8a779a0_sysc_matches[] __initconst = { + { .compatible = "renesas,r8a779a0-sysc", .data = &r8a779a0_sysc_info }, + { /* sentinel */ } +}; + +struct r8a779a0_pm_domains { + struct genpd_onecell_data onecell_data; + struct generic_pm_domain *domains[R8A779A0_PD_ALWAYS_ON + 1]; +}; + +static struct genpd_onecell_data *r8a779a0_sysc_onecell_data; + +static int __init r8a779a0_sysc_pd_init(void) +{ + const struct r8a779a0_sysc_info *info; + const struct of_device_id *match; + struct r8a779a0_pm_domains *domains; + struct device_node *np; + void __iomem *base; + unsigned int i; + int error; + + np = of_find_matching_node_and_match(NULL, r8a779a0_sysc_matches, &match); + if (!np) + return -ENODEV; + + info = match->data; + + base = of_iomap(np, 0); + if (!base) { + pr_warn("%pOF: Cannot map regs\n", np); + error = -ENOMEM; + goto out_put; + } + + r8a779a0_sysc_base = base; + + domains = kzalloc(sizeof(*domains), GFP_KERNEL); + if (!domains) { + error = -ENOMEM; + goto out_put; + } + + domains->onecell_data.domains = domains->domains; + domains->onecell_data.num_domains = ARRAY_SIZE(domains->domains); + r8a779a0_sysc_onecell_data = &domains->onecell_data; + + for (i = 0; i < info->num_areas; i++) { + const struct r8a779a0_sysc_area *area = &info->areas[i]; + struct r8a779a0_sysc_pd *pd; + + if (!area->name) { + /* Skip NULLified area */ + continue; + } + + pd = kzalloc(sizeof(*pd) + strlen(area->name) + 1, GFP_KERNEL); + if (!pd) { + error = -ENOMEM; + goto out_put; + } + + strcpy(pd->name, area->name); + pd->genpd.name = pd->name; + pd->pdr = area->pdr; + pd->flags = area->flags; + + error = r8a779a0_sysc_pd_setup(pd); + if (error) + goto out_put; + + domains->domains[area->pdr] = &pd->genpd; + + if (area->parent < 0) + continue; + + error = pm_genpd_add_subdomain(domains->domains[area->parent], + &pd->genpd); + if (error) { + pr_warn("Failed to add PM subdomain %s to parent %u\n", + area->name, area->parent); + goto out_put; + } + } + + error = of_genpd_add_provider_onecell(np, &domains->onecell_data); + +out_put: + of_node_put(np); + return error; +} +early_initcall(r8a779a0_sysc_pd_init); diff --git a/drivers/soc/renesas/rcar-rst.c b/drivers/soc/renesas/rcar-rst.c index a932015ce9c1..8a1e402ea799 100644 --- a/drivers/soc/renesas/rcar-rst.c +++ b/drivers/soc/renesas/rcar-rst.c @@ -37,6 +37,10 @@ static const struct rst_config rcar_rst_gen3 __initconst = { .modemr = 0x60, }; +static const struct rst_config rcar_rst_r8a779a0 __initconst = { + .modemr = 0x00, /* MODEMR0 and it has CPG related bits */ +}; + static const struct of_device_id rcar_rst_matches[] __initconst = { /* RZ/G1 is handled like R-Car Gen2 */ { .compatible = "renesas,r8a7742-rst", .data = &rcar_rst_gen2 }, @@ -67,6 +71,8 @@ static const struct of_device_id rcar_rst_matches[] __initconst = { { .compatible = "renesas,r8a77980-rst", .data = &rcar_rst_gen3 }, { .compatible = "renesas,r8a77990-rst", .data = &rcar_rst_gen3 }, { .compatible = "renesas,r8a77995-rst", .data = &rcar_rst_gen3 }, + /* R-Car V3U */ + { .compatible = "renesas,r8a779a0-rst", .data = &rcar_rst_r8a779a0 }, { /* sentinel */ } }; diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c index f815a6a8b88b..0f8eff4a641a 100644 --- a/drivers/soc/renesas/renesas-soc.c +++ b/drivers/soc/renesas/renesas-soc.c @@ -200,6 +200,11 @@ static const struct renesas_soc soc_rcar_d3 __initconst __maybe_unused = { .id = 0x58, }; +static const struct renesas_soc soc_rcar_v3u __initconst __maybe_unused = { + .family = &fam_rcar_gen3, + .id = 0x59, +}; + static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = { .family = &fam_shmobile, .id = 0x37, @@ -291,6 +296,9 @@ static const struct of_device_id renesas_socs[] __initconst = { #ifdef CONFIG_ARCH_R8A77995 { .compatible = "renesas,r8a77995", .data = &soc_rcar_d3 }, #endif +#ifdef CONFIG_ARCH_R8A779A0 + { .compatible = "renesas,r8a779a0", .data = &soc_rcar_v3u }, +#endif #ifdef CONFIG_ARCH_SH73A0 { .compatible = "renesas,sh73a0", .data = &soc_shmobile_ag5 }, #endif diff --git a/drivers/soc/rockchip/Kconfig b/drivers/soc/rockchip/Kconfig index b71b73bf5fc5..2c13bf4dd5db 100644 --- a/drivers/soc/rockchip/Kconfig +++ b/drivers/soc/rockchip/Kconfig @@ -14,6 +14,14 @@ config ROCKCHIP_GRF In a lot of cases there also need to be default settings initialized to make some of them conform to expectations of the kernel. +config ROCKCHIP_IODOMAIN + tristate "Rockchip IO domain support" + depends on OF + help + Say y here to enable support io domains on Rockchip SoCs. It is + necessary for the io domain setting of the SoC to match the + voltage supplied by the regulators. + config ROCKCHIP_PM_DOMAINS bool "Rockchip generic power domain" depends on PM diff --git a/drivers/soc/rockchip/Makefile b/drivers/soc/rockchip/Makefile index afca0a4c4b72..875032f7344e 100644 --- a/drivers/soc/rockchip/Makefile +++ b/drivers/soc/rockchip/Makefile @@ -3,4 +3,5 @@ # Rockchip Soc drivers # obj-$(CONFIG_ROCKCHIP_GRF) += grf.o +obj-$(CONFIG_ROCKCHIP_IODOMAIN) += io-domain.o obj-$(CONFIG_ROCKCHIP_PM_DOMAINS) += pm_domains.o diff --git a/drivers/soc/rockchip/io-domain.c b/drivers/soc/rockchip/io-domain.c new file mode 100644 index 000000000000..eece97f97ef8 --- /dev/null +++ b/drivers/soc/rockchip/io-domain.c @@ -0,0 +1,630 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Rockchip IO Voltage Domain driver + * + * Copyright 2014 MundoReader S.L. + * Copyright 2014 Google, Inc. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#define MAX_SUPPLIES 16 + +/* + * The max voltage for 1.8V and 3.3V come from the Rockchip datasheet under + * "Recommended Operating Conditions" for "Digital GPIO". When the typical + * is 3.3V the max is 3.6V. When the typical is 1.8V the max is 1.98V. + * + * They are used like this: + * - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the + * SoC we're at 3.3. + * - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider + * that to be an error. + */ +#define MAX_VOLTAGE_1_8 1980000 +#define MAX_VOLTAGE_3_3 3600000 + +#define PX30_IO_VSEL 0x180 +#define PX30_IO_VSEL_VCCIO6_SRC BIT(0) +#define PX30_IO_VSEL_VCCIO6_SUPPLY_NUM 1 + +#define RK3288_SOC_CON2 0x24c +#define RK3288_SOC_CON2_FLASH0 BIT(7) +#define RK3288_SOC_FLASH_SUPPLY_NUM 2 + +#define RK3328_SOC_CON4 0x410 +#define RK3328_SOC_CON4_VCCIO2 BIT(7) +#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1 + +#define RK3368_SOC_CON15 0x43c +#define RK3368_SOC_CON15_FLASH0 BIT(14) +#define RK3368_SOC_FLASH_SUPPLY_NUM 2 + +#define RK3399_PMUGRF_CON0 0x180 +#define RK3399_PMUGRF_CON0_VSEL BIT(8) +#define RK3399_PMUGRF_VSEL_SUPPLY_NUM 9 + +struct rockchip_iodomain; + +/** + * @supplies: voltage settings matching the register bits. + */ +struct rockchip_iodomain_soc_data { + int grf_offset; + const char *supply_names[MAX_SUPPLIES]; + void (*init)(struct rockchip_iodomain *iod); +}; + +struct rockchip_iodomain_supply { + struct rockchip_iodomain *iod; + struct regulator *reg; + struct notifier_block nb; + int idx; +}; + +struct rockchip_iodomain { + struct device *dev; + struct regmap *grf; + const struct rockchip_iodomain_soc_data *soc_data; + struct rockchip_iodomain_supply supplies[MAX_SUPPLIES]; +}; + +static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply, + int uV) +{ + struct rockchip_iodomain *iod = supply->iod; + u32 val; + int ret; + + /* set value bit */ + val = (uV > MAX_VOLTAGE_1_8) ? 0 : 1; + val <<= supply->idx; + + /* apply hiword-mask */ + val |= (BIT(supply->idx) << 16); + + ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val); + if (ret) + dev_err(iod->dev, "Couldn't write to GRF\n"); + + return ret; +} + +static int rockchip_iodomain_notify(struct notifier_block *nb, + unsigned long event, + void *data) +{ + struct rockchip_iodomain_supply *supply = + container_of(nb, struct rockchip_iodomain_supply, nb); + int uV; + int ret; + + /* + * According to Rockchip it's important to keep the SoC IO domain + * higher than (or equal to) the external voltage. That means we need + * to change it before external voltage changes happen in the case + * of an increase. + * + * Note that in the "pre" change we pick the max possible voltage that + * the regulator might end up at (the client requests a range and we + * don't know for certain the exact voltage). Right now we rely on the + * slop in MAX_VOLTAGE_1_8 and MAX_VOLTAGE_3_3 to save us if clients + * request something like a max of 3.6V when they really want 3.3V. + * We could attempt to come up with better rules if this fails. + */ + if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) { + struct pre_voltage_change_data *pvc_data = data; + + uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV); + } else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE | + REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) { + uV = (unsigned long)data; + } else { + return NOTIFY_OK; + } + + dev_dbg(supply->iod->dev, "Setting to %d\n", uV); + + if (uV > MAX_VOLTAGE_3_3) { + dev_err(supply->iod->dev, "Voltage too high: %d\n", uV); + + if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) + return NOTIFY_BAD; + } + + ret = rockchip_iodomain_write(supply, uV); + if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) + return NOTIFY_BAD; + + dev_dbg(supply->iod->dev, "Setting to %d done\n", uV); + return NOTIFY_OK; +} + +static void px30_iodomain_init(struct rockchip_iodomain *iod) +{ + int ret; + u32 val; + + /* if no VCCIO6 supply we should leave things alone */ + if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg) + return; + + /* + * set vccio6 iodomain to also use this framework + * instead of a special gpio. + */ + val = PX30_IO_VSEL_VCCIO6_SRC | (PX30_IO_VSEL_VCCIO6_SRC << 16); + ret = regmap_write(iod->grf, PX30_IO_VSEL, val); + if (ret < 0) + dev_warn(iod->dev, "couldn't update vccio6 ctrl\n"); +} + +static void rk3288_iodomain_init(struct rockchip_iodomain *iod) +{ + int ret; + u32 val; + + /* if no flash supply we should leave things alone */ + if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg) + return; + + /* + * set flash0 iodomain to also use this framework + * instead of a special gpio. + */ + val = RK3288_SOC_CON2_FLASH0 | (RK3288_SOC_CON2_FLASH0 << 16); + ret = regmap_write(iod->grf, RK3288_SOC_CON2, val); + if (ret < 0) + dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); +} + +static void rk3328_iodomain_init(struct rockchip_iodomain *iod) +{ + int ret; + u32 val; + + /* if no vccio2 supply we should leave things alone */ + if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg) + return; + + /* + * set vccio2 iodomain to also use this framework + * instead of a special gpio. + */ + val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16); + ret = regmap_write(iod->grf, RK3328_SOC_CON4, val); + if (ret < 0) + dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n"); +} + +static void rk3368_iodomain_init(struct rockchip_iodomain *iod) +{ + int ret; + u32 val; + + /* if no flash supply we should leave things alone */ + if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg) + return; + + /* + * set flash0 iodomain to also use this framework + * instead of a special gpio. + */ + val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16); + ret = regmap_write(iod->grf, RK3368_SOC_CON15, val); + if (ret < 0) + dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); +} + +static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod) +{ + int ret; + u32 val; + + /* if no pmu io supply we should leave things alone */ + if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg) + return; + + /* + * set pmu io iodomain to also use this framework + * instead of a special gpio. + */ + val = RK3399_PMUGRF_CON0_VSEL | (RK3399_PMUGRF_CON0_VSEL << 16); + ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val); + if (ret < 0) + dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n"); +} + +static const struct rockchip_iodomain_soc_data soc_data_px30 = { + .grf_offset = 0x180, + .supply_names = { + NULL, + "vccio6", + "vccio1", + "vccio2", + "vccio3", + "vccio4", + "vccio5", + "vccio-oscgpi", + }, + .init = px30_iodomain_init, +}; + +static const struct rockchip_iodomain_soc_data soc_data_px30_pmu = { + .grf_offset = 0x100, + .supply_names = { + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + "pmuio1", + "pmuio2", + }, +}; + +/* + * On the rk3188 the io-domains are handled by a shared register with the + * lower 8 bits being still being continuing drive-strength settings. + */ +static const struct rockchip_iodomain_soc_data soc_data_rk3188 = { + .grf_offset = 0x104, + .supply_names = { + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + "ap0", + "ap1", + "cif", + "flash", + "vccio0", + "vccio1", + "lcdc0", + "lcdc1", + }, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3228 = { + .grf_offset = 0x418, + .supply_names = { + "vccio1", + "vccio2", + "vccio3", + "vccio4", + }, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3288 = { + .grf_offset = 0x380, + .supply_names = { + "lcdc", /* LCDC_VDD */ + "dvp", /* DVPIO_VDD */ + "flash0", /* FLASH0_VDD (emmc) */ + "flash1", /* FLASH1_VDD (sdio1) */ + "wifi", /* APIO3_VDD (sdio0) */ + "bb", /* APIO5_VDD */ + "audio", /* APIO4_VDD */ + "sdcard", /* SDMMC0_VDD (sdmmc) */ + "gpio30", /* APIO1_VDD */ + "gpio1830", /* APIO2_VDD */ + }, + .init = rk3288_iodomain_init, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3328 = { + .grf_offset = 0x410, + .supply_names = { + "vccio1", + "vccio2", + "vccio3", + "vccio4", + "vccio5", + "vccio6", + "pmuio", + }, + .init = rk3328_iodomain_init, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3368 = { + .grf_offset = 0x900, + .supply_names = { + NULL, /* reserved */ + "dvp", /* DVPIO_VDD */ + "flash0", /* FLASH0_VDD (emmc) */ + "wifi", /* APIO2_VDD (sdio0) */ + NULL, + "audio", /* APIO3_VDD */ + "sdcard", /* SDMMC0_VDD (sdmmc) */ + "gpio30", /* APIO1_VDD */ + "gpio1830", /* APIO4_VDD (gpujtag) */ + }, + .init = rk3368_iodomain_init, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = { + .grf_offset = 0x100, + .supply_names = { + NULL, + NULL, + NULL, + NULL, + "pmu", /*PMU IO domain*/ + "vop", /*LCDC IO domain*/ + }, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3399 = { + .grf_offset = 0xe640, + .supply_names = { + "bt656", /* APIO2_VDD */ + "audio", /* APIO5_VDD */ + "sdmmc", /* SDMMC0_VDD */ + "gpio1830", /* APIO4_VDD */ + }, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = { + .grf_offset = 0x180, + .supply_names = { + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + "pmu1830", /* PMUIO2_VDD */ + }, + .init = rk3399_pmu_iodomain_init, +}; + +static const struct rockchip_iodomain_soc_data soc_data_rv1108 = { + .grf_offset = 0x404, + .supply_names = { + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + "vccio1", + "vccio2", + "vccio3", + "vccio5", + "vccio6", + }, + +}; + +static const struct rockchip_iodomain_soc_data soc_data_rv1108_pmu = { + .grf_offset = 0x104, + .supply_names = { + "pmu", + }, +}; + +static const struct of_device_id rockchip_iodomain_match[] = { + { + .compatible = "rockchip,px30-io-voltage-domain", + .data = (void *)&soc_data_px30 + }, + { + .compatible = "rockchip,px30-pmu-io-voltage-domain", + .data = (void *)&soc_data_px30_pmu + }, + { + .compatible = "rockchip,rk3188-io-voltage-domain", + .data = &soc_data_rk3188 + }, + { + .compatible = "rockchip,rk3228-io-voltage-domain", + .data = &soc_data_rk3228 + }, + { + .compatible = "rockchip,rk3288-io-voltage-domain", + .data = &soc_data_rk3288 + }, + { + .compatible = "rockchip,rk3328-io-voltage-domain", + .data = &soc_data_rk3328 + }, + { + .compatible = "rockchip,rk3368-io-voltage-domain", + .data = &soc_data_rk3368 + }, + { + .compatible = "rockchip,rk3368-pmu-io-voltage-domain", + .data = &soc_data_rk3368_pmu + }, + { + .compatible = "rockchip,rk3399-io-voltage-domain", + .data = &soc_data_rk3399 + }, + { + .compatible = "rockchip,rk3399-pmu-io-voltage-domain", + .data = &soc_data_rk3399_pmu + }, + { + .compatible = "rockchip,rv1108-io-voltage-domain", + .data = &soc_data_rv1108 + }, + { + .compatible = "rockchip,rv1108-pmu-io-voltage-domain", + .data = &soc_data_rv1108_pmu + }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, rockchip_iodomain_match); + +static int rockchip_iodomain_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + const struct of_device_id *match; + struct rockchip_iodomain *iod; + struct device *parent; + int i, ret = 0; + + if (!np) + return -ENODEV; + + iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL); + if (!iod) + return -ENOMEM; + + iod->dev = &pdev->dev; + platform_set_drvdata(pdev, iod); + + match = of_match_node(rockchip_iodomain_match, np); + iod->soc_data = match->data; + + parent = pdev->dev.parent; + if (parent && parent->of_node) { + iod->grf = syscon_node_to_regmap(parent->of_node); + } else { + dev_dbg(&pdev->dev, "falling back to old binding\n"); + iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); + } + + if (IS_ERR(iod->grf)) { + dev_err(&pdev->dev, "couldn't find grf regmap\n"); + return PTR_ERR(iod->grf); + } + + for (i = 0; i < MAX_SUPPLIES; i++) { + const char *supply_name = iod->soc_data->supply_names[i]; + struct rockchip_iodomain_supply *supply = &iod->supplies[i]; + struct regulator *reg; + int uV; + + if (!supply_name) + continue; + + reg = devm_regulator_get_optional(iod->dev, supply_name); + if (IS_ERR(reg)) { + ret = PTR_ERR(reg); + + /* If a supply wasn't specified, that's OK */ + if (ret == -ENODEV) + continue; + else if (ret != -EPROBE_DEFER) + dev_err(iod->dev, "couldn't get regulator %s\n", + supply_name); + goto unreg_notify; + } + + /* set initial correct value */ + uV = regulator_get_voltage(reg); + + /* must be a regulator we can get the voltage of */ + if (uV < 0) { + dev_err(iod->dev, "Can't determine voltage: %s\n", + supply_name); + goto unreg_notify; + } + + if (uV > MAX_VOLTAGE_3_3) { + dev_crit(iod->dev, + "%d uV is too high. May damage SoC!\n", + uV); + ret = -EINVAL; + goto unreg_notify; + } + + /* setup our supply */ + supply->idx = i; + supply->iod = iod; + supply->reg = reg; + supply->nb.notifier_call = rockchip_iodomain_notify; + + ret = rockchip_iodomain_write(supply, uV); + if (ret) { + supply->reg = NULL; + goto unreg_notify; + } + + /* register regulator notifier */ + ret = regulator_register_notifier(reg, &supply->nb); + if (ret) { + dev_err(&pdev->dev, + "regulator notifier request failed\n"); + supply->reg = NULL; + goto unreg_notify; + } + } + + if (iod->soc_data->init) + iod->soc_data->init(iod); + + return 0; + +unreg_notify: + for (i = MAX_SUPPLIES - 1; i >= 0; i--) { + struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; + + if (io_supply->reg) + regulator_unregister_notifier(io_supply->reg, + &io_supply->nb); + } + + return ret; +} + +static int rockchip_iodomain_remove(struct platform_device *pdev) +{ + struct rockchip_iodomain *iod = platform_get_drvdata(pdev); + int i; + + for (i = MAX_SUPPLIES - 1; i >= 0; i--) { + struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; + + if (io_supply->reg) + regulator_unregister_notifier(io_supply->reg, + &io_supply->nb); + } + + return 0; +} + +static struct platform_driver rockchip_iodomain_driver = { + .probe = rockchip_iodomain_probe, + .remove = rockchip_iodomain_remove, + .driver = { + .name = "rockchip-iodomain", + .of_match_table = rockchip_iodomain_match, + }, +}; + +module_platform_driver(rockchip_iodomain_driver); + +MODULE_DESCRIPTION("Rockchip IO-domain driver"); +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); +MODULE_AUTHOR("Doug Anderson <dianders@chromium.org>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig index 264185664594..fc7f48a92288 100644 --- a/drivers/soc/samsung/Kconfig +++ b/drivers/soc/samsung/Kconfig @@ -35,7 +35,54 @@ config EXYNOS_PMU_ARM_DRIVERS config EXYNOS_PM_DOMAINS bool "Exynos PM domains" if COMPILE_TEST - depends on PM_GENERIC_DOMAINS || COMPILE_TEST + depends on (ARCH_EXYNOS && PM_GENERIC_DOMAINS) || COMPILE_TEST + +config SAMSUNG_PM_DEBUG + bool "Samsung PM Suspend debug" + depends on PM && DEBUG_KERNEL + depends on PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210 + depends on DEBUG_S3C24XX_UART || DEBUG_S3C2410_UART + depends on DEBUG_LL && MMU + help + Say Y here if you want verbose debugging from the PM Suspend and + Resume code. See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> + for more information. + +config S3C_PM_DEBUG_LED_SMDK + bool "SMDK LED suspend/resume debugging" + depends on PM && (MACH_SMDK6410) + help + Say Y here to enable the use of the SMDK LEDs on the baseboard + for debugging of the state of the suspend and resume process. + + Note, this currently only works for S3C64XX based SMDK boards. + +config SAMSUNG_PM_CHECK + bool "S3C2410 PM Suspend Memory CRC" + depends on PM && (PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210) + select CRC32 + help + Enable the PM code's memory area checksum over sleep. This option + will generate CRCs of all blocks of memory, and store them before + going to sleep. The blocks are then checked on resume for any + errors. + + Note, this can take several seconds depending on memory size + and CPU speed. + + See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> + +config SAMSUNG_PM_CHECK_CHUNKSIZE + int "S3C2410 PM Suspend CRC Chunksize (KiB)" + depends on PM && SAMSUNG_PM_CHECK + default 64 + help + Set the chunksize in Kilobytes of the CRC for checking memory + corruption over suspend and resume. A smaller value will mean that + the CRC data block will take more memory, but will identify any + faults with better precision. + + See <file:Documentation/arm/samsung-s3c24xx/suspend.rst> config EXYNOS_REGULATOR_COUPLER bool "Exynos SoC Regulator Coupler" if COMPILE_TEST diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile index ecc3a32f6406..59e8e9453f27 100644 --- a/drivers/soc/samsung/Makefile +++ b/drivers/soc/samsung/Makefile @@ -10,3 +10,6 @@ obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS) += exynos3250-pmu.o exynos4-pmu.o \ exynos5250-pmu.o exynos5420-pmu.o obj-$(CONFIG_EXYNOS_PM_DOMAINS) += pm_domains.o obj-$(CONFIG_EXYNOS_REGULATOR_COUPLER) += exynos-regulator-coupler.o + +obj-$(CONFIG_SAMSUNG_PM_CHECK) += s3c-pm-check.o +obj-$(CONFIG_SAMSUNG_PM_DEBUG) += s3c-pm-debug.o diff --git a/drivers/soc/samsung/s3c-pm-check.c b/drivers/soc/samsung/s3c-pm-check.c new file mode 100644 index 000000000000..ff3e099fc208 --- /dev/null +++ b/drivers/soc/samsung/s3c-pm-check.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// originally in linux/arch/arm/plat-s3c24xx/pm.c +// +// Copyright (c) 2004-2008 Simtec Electronics +// http://armlinux.simtec.co.uk +// Ben Dooks <ben@simtec.co.uk> +// +// S3C Power Mangament - suspend/resume memory corruption check. + +#include <linux/kernel.h> +#include <linux/suspend.h> +#include <linux/init.h> +#include <linux/crc32.h> +#include <linux/ioport.h> +#include <linux/slab.h> + +#include <linux/soc/samsung/s3c-pm.h> + +#if CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE < 1 +#error CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE must be a positive non-zero value +#endif + +/* suspend checking code... + * + * this next area does a set of crc checks over all the installed + * memory, so the system can verify if the resume was ok. + * + * CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE defines the block-size for the CRC, + * increasing it will mean that the area corrupted will be less easy to spot, + * and reducing the size will cause the CRC save area to grow +*/ + +#define CHECK_CHUNKSIZE (CONFIG_SAMSUNG_PM_CHECK_CHUNKSIZE * 1024) + +static u32 crc_size; /* size needed for the crc block */ +static u32 *crcs; /* allocated over suspend/resume */ + +typedef u32 *(run_fn_t)(struct resource *ptr, u32 *arg); + +/* s3c_pm_run_res + * + * go through the given resource list, and look for system ram +*/ + +static void s3c_pm_run_res(struct resource *ptr, run_fn_t fn, u32 *arg) +{ + while (ptr != NULL) { + if (ptr->child != NULL) + s3c_pm_run_res(ptr->child, fn, arg); + + if ((ptr->flags & IORESOURCE_SYSTEM_RAM) + == IORESOURCE_SYSTEM_RAM) { + S3C_PMDBG("Found system RAM at %08lx..%08lx\n", + (unsigned long)ptr->start, + (unsigned long)ptr->end); + arg = (fn)(ptr, arg); + } + + ptr = ptr->sibling; + } +} + +static void s3c_pm_run_sysram(run_fn_t fn, u32 *arg) +{ + s3c_pm_run_res(&iomem_resource, fn, arg); +} + +static u32 *s3c_pm_countram(struct resource *res, u32 *val) +{ + u32 size = (u32)resource_size(res); + + size += CHECK_CHUNKSIZE-1; + size /= CHECK_CHUNKSIZE; + + S3C_PMDBG("Area %08lx..%08lx, %d blocks\n", + (unsigned long)res->start, (unsigned long)res->end, size); + + *val += size * sizeof(u32); + return val; +} + +/* s3c_pm_prepare_check + * + * prepare the necessary information for creating the CRCs. This + * must be done before the final save, as it will require memory + * allocating, and thus touching bits of the kernel we do not + * know about. +*/ + +void s3c_pm_check_prepare(void) +{ + crc_size = 0; + + s3c_pm_run_sysram(s3c_pm_countram, &crc_size); + + S3C_PMDBG("s3c_pm_prepare_check: %u checks needed\n", crc_size); + + crcs = kmalloc(crc_size+4, GFP_KERNEL); + if (crcs == NULL) + printk(KERN_ERR "Cannot allocated CRC save area\n"); +} + +static u32 *s3c_pm_makecheck(struct resource *res, u32 *val) +{ + unsigned long addr, left; + + for (addr = res->start; addr < res->end; + addr += CHECK_CHUNKSIZE) { + left = res->end - addr; + + if (left > CHECK_CHUNKSIZE) + left = CHECK_CHUNKSIZE; + + *val = crc32_le(~0, phys_to_virt(addr), left); + val++; + } + + return val; +} + +/* s3c_pm_check_store + * + * compute the CRC values for the memory blocks before the final + * sleep. +*/ + +void s3c_pm_check_store(void) +{ + if (crcs != NULL) + s3c_pm_run_sysram(s3c_pm_makecheck, crcs); +} + +/* in_region + * + * return TRUE if the area defined by ptr..ptr+size contains the + * what..what+whatsz +*/ + +static inline int in_region(void *ptr, int size, void *what, size_t whatsz) +{ + if ((what+whatsz) < ptr) + return 0; + + if (what > (ptr+size)) + return 0; + + return 1; +} + +/** + * s3c_pm_runcheck() - helper to check a resource on restore. + * @res: The resource to check + * @vak: Pointer to list of CRC32 values to check. + * + * Called from the s3c_pm_check_restore() via s3c_pm_run_sysram(), this + * function runs the given memory resource checking it against the stored + * CRC to ensure that memory is restored. The function tries to skip as + * many of the areas used during the suspend process. + */ +static u32 *s3c_pm_runcheck(struct resource *res, u32 *val) +{ + unsigned long addr; + unsigned long left; + void *stkpage; + void *ptr; + u32 calc; + + stkpage = (void *)((u32)&calc & ~PAGE_MASK); + + for (addr = res->start; addr < res->end; + addr += CHECK_CHUNKSIZE) { + left = res->end - addr; + + if (left > CHECK_CHUNKSIZE) + left = CHECK_CHUNKSIZE; + + ptr = phys_to_virt(addr); + + if (in_region(ptr, left, stkpage, 4096)) { + S3C_PMDBG("skipping %08lx, has stack in\n", addr); + goto skip_check; + } + + if (in_region(ptr, left, crcs, crc_size)) { + S3C_PMDBG("skipping %08lx, has crc block in\n", addr); + goto skip_check; + } + + /* calculate and check the checksum */ + + calc = crc32_le(~0, ptr, left); + if (calc != *val) { + printk(KERN_ERR "Restore CRC error at " + "%08lx (%08x vs %08x)\n", addr, calc, *val); + + S3C_PMDBG("Restore CRC error at %08lx (%08x vs %08x)\n", + addr, calc, *val); + } + + skip_check: + val++; + } + + return val; +} + +/** + * s3c_pm_check_restore() - memory check called on resume + * + * check the CRCs after the restore event and free the memory used + * to hold them +*/ +void s3c_pm_check_restore(void) +{ + if (crcs != NULL) + s3c_pm_run_sysram(s3c_pm_runcheck, crcs); +} + +/** + * s3c_pm_check_cleanup() - free memory resources + * + * Free the resources that where allocated by the suspend + * memory check code. We do this separately from the + * s3c_pm_check_restore() function as we cannot call any + * functions that might sleep during that resume. + */ +void s3c_pm_check_cleanup(void) +{ + kfree(crcs); + crcs = NULL; +} + diff --git a/drivers/soc/samsung/s3c-pm-debug.c b/drivers/soc/samsung/s3c-pm-debug.c new file mode 100644 index 000000000000..b5ce0e9a41e5 --- /dev/null +++ b/drivers/soc/samsung/s3c-pm-debug.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2013 Samsung Electronics Co., Ltd. +// Tomasz Figa <t.figa@samsung.com> +// Copyright (C) 2008 Openmoko, Inc. +// Copyright (C) 2004-2008 Simtec Electronics +// Ben Dooks <ben@simtec.co.uk> +// http://armlinux.simtec.co.uk/ +// +// Samsung common power management (suspend to RAM) debug support + +#include <linux/serial_core.h> +#include <linux/serial_s3c.h> +#include <linux/io.h> + +#include <asm/mach/map.h> + +#include <linux/soc/samsung/s3c-pm.h> + +static struct pm_uart_save uart_save; + +extern void printascii(const char *); + +void s3c_pm_dbg(const char *fmt, ...) +{ + va_list va; + char buff[256]; + + va_start(va, fmt); + vsnprintf(buff, sizeof(buff), fmt, va); + va_end(va); + + printascii(buff); +} + +static inline void __iomem *s3c_pm_uart_base(void) +{ + unsigned long paddr; + unsigned long vaddr; + + debug_ll_addr(&paddr, &vaddr); + + return (void __iomem *)vaddr; +} + +void s3c_pm_save_uarts(bool is_s3c2410) +{ + void __iomem *regs = s3c_pm_uart_base(); + struct pm_uart_save *save = &uart_save; + + save->ulcon = __raw_readl(regs + S3C2410_ULCON); + save->ucon = __raw_readl(regs + S3C2410_UCON); + save->ufcon = __raw_readl(regs + S3C2410_UFCON); + save->umcon = __raw_readl(regs + S3C2410_UMCON); + save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV); + + if (!is_s3c2410) + save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT); + + S3C_PMDBG("UART[%p]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n", + regs, save->ulcon, save->ucon, save->ufcon, save->ubrdiv); +} + +void s3c_pm_restore_uarts(bool is_s3c2410) +{ + void __iomem *regs = s3c_pm_uart_base(); + struct pm_uart_save *save = &uart_save; + + s3c_pm_arch_update_uart(regs, save); + + __raw_writel(save->ulcon, regs + S3C2410_ULCON); + __raw_writel(save->ucon, regs + S3C2410_UCON); + __raw_writel(save->ufcon, regs + S3C2410_UFCON); + __raw_writel(save->umcon, regs + S3C2410_UMCON); + __raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV); + + if (!is_s3c2410) + __raw_writel(save->udivslot, regs + S3C2443_DIVSLOT); +} diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 1b0d50f36349..d4c7bd59429e 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -194,7 +194,7 @@ static const struct sunxi_sram_data *sunxi_sram_of_parse(struct device_node *nod if (!data) { ret = -EINVAL; goto err; - }; + } for (func = data->func; func->func; func++) { if (val == func->val) { diff --git a/drivers/soc/tegra/Kconfig b/drivers/soc/tegra/Kconfig index 6bc603d0b9d9..976dee036470 100644 --- a/drivers/soc/tegra/Kconfig +++ b/drivers/soc/tegra/Kconfig @@ -119,6 +119,16 @@ config ARCH_TEGRA_194_SOC help Enable support for the NVIDIA Tegra194 SoC. +config ARCH_TEGRA_234_SOC + bool "NVIDIA Tegra234 SoC" + select MAILBOX + select TEGRA_BPMP + select TEGRA_HSP_MBOX + select TEGRA_IVC + select SOC_TEGRA_PMC + help + Enable support for the NVIDIA Tegra234 SoC. + endif endif diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index d1f8dd0289e6..94b60a692b51 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -49,6 +49,9 @@ static struct tegra_fuse *fuse = &(struct tegra_fuse) { }; static const struct of_device_id tegra_fuse_match[] = { +#ifdef CONFIG_ARCH_TEGRA_234_SOC + { .compatible = "nvidia,tegra234-efuse", .data = &tegra234_fuse_soc }, +#endif #ifdef CONFIG_ARCH_TEGRA_194_SOC { .compatible = "nvidia,tegra194-efuse", .data = &tegra194_fuse_soc }, #endif @@ -326,7 +329,8 @@ const struct attribute_group tegra_soc_attr_group = { .attrs = tegra_soc_attr, }; -#ifdef CONFIG_ARCH_TEGRA_194_SOC +#if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) || \ + IS_ENABLED(CONFIG_ARCH_TEGRA_234_SOC) static ssize_t platform_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -336,7 +340,7 @@ static ssize_t platform_show(struct device *dev, struct device_attribute *attr, * platform type is silicon and all other non-zero values indicate * the type of simulation platform is being used. */ - return sprintf(buf, "%d\n", (tegra_read_chipid() >> 20) & 0xf); + return sprintf(buf, "%d\n", tegra_get_platform()); } static DEVICE_ATTR_RO(platform); diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c index 85accef41fa1..9ea7f0168457 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra30.c +++ b/drivers/soc/tegra/fuse/fuse-tegra30.c @@ -356,3 +356,33 @@ const struct tegra_fuse_soc tegra194_fuse_soc = { .soc_attr_group = &tegra194_soc_attr_group, }; #endif + +#if defined(CONFIG_ARCH_TEGRA_234_SOC) +static const struct nvmem_cell_lookup tegra234_fuse_lookups[] = { + { + .nvmem_name = "fuse", + .cell_name = "xusb-pad-calibration", + .dev_id = "3520000.padctl", + .con_id = "calibration", + }, { + .nvmem_name = "fuse", + .cell_name = "xusb-pad-calibration-ext", + .dev_id = "3520000.padctl", + .con_id = "calibration-ext", + }, +}; + +static const struct tegra_fuse_info tegra234_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x300, + .spare = 0x280, +}; + +const struct tegra_fuse_soc tegra234_fuse_soc = { + .init = tegra30_fuse_init, + .info = &tegra234_fuse_info, + .lookups = tegra234_fuse_lookups, + .num_lookups = ARRAY_SIZE(tegra234_fuse_lookups), + .soc_attr_group = &tegra194_soc_attr_group, +}; +#endif diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h index 9d4fc315a007..e057a58e2060 100644 --- a/drivers/soc/tegra/fuse/fuse.h +++ b/drivers/soc/tegra/fuse/fuse.h @@ -115,9 +115,17 @@ extern const struct tegra_fuse_soc tegra210_fuse_soc; extern const struct tegra_fuse_soc tegra186_fuse_soc; #endif +#if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) || \ + IS_ENABLED(CONFIG_ARCH_TEGRA_234_SOC) +extern const struct attribute_group tegra194_soc_attr_group; +#endif + #ifdef CONFIG_ARCH_TEGRA_194_SOC extern const struct tegra_fuse_soc tegra194_fuse_soc; -extern const struct attribute_group tegra194_soc_attr_group; +#endif + +#ifdef CONFIG_ARCH_TEGRA_234_SOC +extern const struct tegra_fuse_soc tegra234_fuse_soc; #endif #endif diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 8e416ad91ee2..cee207d10024 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -47,6 +47,31 @@ u8 tegra_get_minor_rev(void) return (tegra_read_chipid() >> 16) & 0xf; } +u8 tegra_get_platform(void) +{ + return (tegra_read_chipid() >> 20) & 0xf; +} + +bool tegra_is_silicon(void) +{ + switch (tegra_get_chip_id()) { + case TEGRA194: + case TEGRA234: + if (tegra_get_platform() == 0) + return true; + + return false; + } + + /* + * Chips prior to Tegra194 have a different way of determining whether + * they are silicon or not. Since we never supported simulation on the + * older Tegra chips, don't bother extracting the information and just + * report that we're running on silicon. + */ + return true; +} + u32 tegra_read_straps(void) { WARN(!chipid, "Tegra ABP MISC not yet available\n"); @@ -70,6 +95,7 @@ static const struct of_device_id apbmisc_match[] __initconst = { { .compatible = "nvidia,tegra20-apbmisc", }, { .compatible = "nvidia,tegra186-misc", }, { .compatible = "nvidia,tegra194-misc", }, + { .compatible = "nvidia,tegra234-misc", }, {}, }; diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index b0bba8ab75bb..df9a5ca8c99c 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -336,45 +336,6 @@ struct tegra_pmc_soc { bool has_blink_output; }; -static const char * const tegra186_reset_sources[] = { - "SYS_RESET", - "AOWDT", - "MCCPLEXWDT", - "BPMPWDT", - "SCEWDT", - "SPEWDT", - "APEWDT", - "BCCPLEXWDT", - "SENSOR", - "AOTAG", - "VFSENSOR", - "SWREST", - "SC7", - "HSM", - "CORESIGHT" -}; - -static const char * const tegra186_reset_levels[] = { - "L0", "L1", "L2", "WARM" -}; - -static const char * const tegra30_reset_sources[] = { - "POWER_ON_RESET", - "WATCHDOG", - "SENSOR", - "SW_MAIN", - "LP0" -}; - -static const char * const tegra210_reset_sources[] = { - "POWER_ON_RESET", - "WATCHDOG", - "SENSOR", - "SW_MAIN", - "LP0", - "AOTAG" -}; - /** * struct tegra_pmc - NVIDIA Tegra PMC * @dev: pointer to PMC device structure @@ -2771,6 +2732,14 @@ static const u8 tegra30_cpu_powergates[] = { TEGRA_POWERGATE_CPU3, }; +static const char * const tegra30_reset_sources[] = { + "POWER_ON_RESET", + "WATCHDOG", + "SENSOR", + "SW_MAIN", + "LP0" +}; + static const struct tegra_pmc_soc tegra30_pmc_soc = { .num_powergates = ARRAY_SIZE(tegra30_powergates), .powergates = tegra30_powergates, @@ -3048,6 +3017,15 @@ static const struct pinctrl_pin_desc tegra210_pin_descs[] = { TEGRA210_IO_PAD_TABLE(TEGRA_IO_PIN_DESC) }; +static const char * const tegra210_reset_sources[] = { + "POWER_ON_RESET", + "WATCHDOG", + "SENSOR", + "SW_MAIN", + "LP0", + "AOTAG" +}; + static const struct tegra_wake_event tegra210_wake_events[] = { TEGRA_WAKE_IRQ("rtc", 16, 2), TEGRA_WAKE_IRQ("pmu", 51, 86), @@ -3180,6 +3158,28 @@ static void tegra186_pmc_setup_irq_polarity(struct tegra_pmc *pmc, iounmap(wake); } +static const char * const tegra186_reset_sources[] = { + "SYS_RESET", + "AOWDT", + "MCCPLEXWDT", + "BPMPWDT", + "SCEWDT", + "SPEWDT", + "APEWDT", + "BCCPLEXWDT", + "SENSOR", + "AOTAG", + "VFSENSOR", + "SWREST", + "SC7", + "HSM", + "CORESIGHT" +}; + +static const char * const tegra186_reset_levels[] = { + "L0", "L1", "L2", "WARM" +}; + static const struct tegra_wake_event tegra186_wake_events[] = { TEGRA_WAKE_IRQ("pmu", 24, 209), TEGRA_WAKE_GPIO("power", 29, 1, TEGRA186_AON_GPIO(FF, 0)), @@ -3349,7 +3349,75 @@ static const struct tegra_pmc_soc tegra194_pmc_soc = { .has_blink_output = false, }; +static const struct tegra_pmc_regs tegra234_pmc_regs = { + .scratch0 = 0x2000, + .dpd_req = 0, + .dpd_status = 0, + .dpd2_req = 0, + .dpd2_status = 0, + .rst_status = 0x70, + .rst_source_shift = 0x2, + .rst_source_mask = 0xfc, + .rst_level_shift = 0x0, + .rst_level_mask = 0x3, +}; + +static const char * const tegra234_reset_sources[] = { + "SYS_RESET_N", + "AOWDT", + "BCCPLEXWDT", + "BPMPWDT", + "SCEWDT", + "SPEWDT", + "APEWDT", + "LCCPLEXWDT", + "SENSOR", + "AOTAG", + "VFSENSOR", + "MAINSWRST", + "SC7", + "HSM", + "CSITE", + "RCEWDT", + "PVA0WDT", + "PVA1WDT", + "L1A_ASYNC", + "BPMPBOOT", + "FUSECRC", +}; + +static const struct tegra_pmc_soc tegra234_pmc_soc = { + .num_powergates = 0, + .powergates = NULL, + .num_cpu_powergates = 0, + .cpu_powergates = NULL, + .has_tsense_reset = false, + .has_gpu_clamps = false, + .needs_mbist_war = false, + .has_impl_33v_pwr = true, + .maybe_tz_only = false, + .num_io_pads = 0, + .io_pads = NULL, + .num_pin_descs = 0, + .pin_descs = NULL, + .regs = &tegra234_pmc_regs, + .init = NULL, + .setup_irq_polarity = tegra186_pmc_setup_irq_polarity, + .irq_set_wake = tegra186_pmc_irq_set_wake, + .irq_set_type = tegra186_pmc_irq_set_type, + .reset_sources = tegra234_reset_sources, + .num_reset_sources = ARRAY_SIZE(tegra234_reset_sources), + .reset_levels = tegra186_reset_levels, + .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels), + .num_wake_events = 0, + .wake_events = NULL, + .pmc_clks_data = NULL, + .num_pmc_clks = 0, + .has_blink_output = false, +}; + static const struct of_device_id tegra_pmc_match[] = { + { .compatible = "nvidia,tegra234-pmc", .data = &tegra234_pmc_soc }, { .compatible = "nvidia,tegra194-pmc", .data = &tegra194_pmc_soc }, { .compatible = "nvidia,tegra186-pmc", .data = &tegra186_pmc_soc }, { .compatible = "nvidia,tegra210-pmc", .data = &tegra210_pmc_soc }, diff --git a/drivers/soc/ti/Kconfig b/drivers/soc/ti/Kconfig index e192fb788836..f5b82ffa637b 100644 --- a/drivers/soc/ti/Kconfig +++ b/drivers/soc/ti/Kconfig @@ -101,6 +101,17 @@ config TI_K3_SOCINFO platforms to provide information about the SoC family and variant to user space. +config TI_PRUSS + tristate "TI PRU-ICSS Subsystem Platform drivers" + depends on SOC_AM33XX || SOC_AM43XX || SOC_DRA7XX || ARCH_KEYSTONE || ARCH_K3 + select MFD_SYSCON + help + TI PRU-ICSS Subsystem platform specific support. + + Say Y or M here to support the Programmable Realtime Unit (PRU) + processors on various TI SoCs. It's safe to say N here if you're + not interested in the PRU or if you are unsure. + endif # SOC_TI config TI_SCI_INTA_MSI_DOMAIN diff --git a/drivers/soc/ti/Makefile b/drivers/soc/ti/Makefile index 1110e5c98685..cc3c972fad2e 100644 --- a/drivers/soc/ti/Makefile +++ b/drivers/soc/ti/Makefile @@ -12,3 +12,5 @@ obj-$(CONFIG_TI_SCI_PM_DOMAINS) += ti_sci_pm_domains.o obj-$(CONFIG_TI_SCI_INTA_MSI_DOMAIN) += ti_sci_inta_msi.o obj-$(CONFIG_TI_K3_RINGACC) += k3-ringacc.o obj-$(CONFIG_TI_K3_SOCINFO) += k3-socinfo.o +obj-$(CONFIG_TI_PRUSS) += pruss.o +obj-$(CONFIG_POWER_AVS_OMAP) += smartreflex.o diff --git a/drivers/soc/ti/k3-ringacc.c b/drivers/soc/ti/k3-ringacc.c index 6dcc21dde0cb..1147dc4c1d59 100644 --- a/drivers/soc/ti/k3-ringacc.c +++ b/drivers/soc/ti/k3-ringacc.c @@ -10,6 +10,7 @@ #include <linux/init.h> #include <linux/of.h> #include <linux/platform_device.h> +#include <linux/sys_soc.h> #include <linux/soc/ti/k3-ringacc.h> #include <linux/soc/ti/ti_sci_protocol.h> #include <linux/soc/ti/ti_sci_inta_msi.h> @@ -208,6 +209,15 @@ struct k3_ringacc { const struct k3_ringacc_ops *ops; }; +/** + * struct k3_ringacc - Rings accelerator SoC data + * + * @dma_ring_reset_quirk: DMA reset w/a enable + */ +struct k3_ringacc_soc_data { + unsigned dma_ring_reset_quirk:1; +}; + static long k3_ringacc_ring_get_fifo_pos(struct k3_ring *ring) { return K3_RINGACC_FIFO_WINDOW_SIZE_BYTES - @@ -1051,9 +1061,6 @@ static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc) return ret; } - ringacc->dma_ring_reset_quirk = - of_property_read_bool(node, "ti,dma-ring-reset-quirk"); - ringacc->tisci = ti_sci_get_by_phandle(node, "ti,sci"); if (IS_ERR(ringacc->tisci)) { ret = PTR_ERR(ringacc->tisci); @@ -1084,9 +1091,22 @@ static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc) ringacc->rm_gp_range); } +static const struct k3_ringacc_soc_data k3_ringacc_soc_data_sr1 = { + .dma_ring_reset_quirk = 1, +}; + +static const struct soc_device_attribute k3_ringacc_socinfo[] = { + { .family = "AM65X", + .revision = "SR1.0", + .data = &k3_ringacc_soc_data_sr1 + }, + {/* sentinel */} +}; + static int k3_ringacc_init(struct platform_device *pdev, struct k3_ringacc *ringacc) { + const struct soc_device_attribute *soc; void __iomem *base_fifo, *base_rt; struct device *dev = &pdev->dev; struct resource *res; @@ -1103,6 +1123,13 @@ static int k3_ringacc_init(struct platform_device *pdev, if (ret) return ret; + soc = soc_device_match(k3_ringacc_socinfo); + if (soc && soc->data) { + const struct k3_ringacc_soc_data *soc_data = soc->data; + + ringacc->dma_ring_reset_quirk = soc_data->dma_ring_reset_quirk; + } + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rt"); base_rt = devm_ioremap_resource(dev, res); if (IS_ERR(base_rt)) diff --git a/drivers/soc/ti/k3-socinfo.c b/drivers/soc/ti/k3-socinfo.c index af0ba5288e58..bbbc2d2b7091 100644 --- a/drivers/soc/ti/k3-socinfo.c +++ b/drivers/soc/ti/k3-socinfo.c @@ -39,6 +39,7 @@ static const struct k3_soc_id { } k3_soc_ids[] = { { 0xBB5A, "AM65X" }, { 0xBB64, "J721E" }, + { 0xBB6D, "J7200" }, }; static int diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c index 6285cd8efb21..8c863ecb1c60 100644 --- a/drivers/soc/ti/knav_dma.c +++ b/drivers/soc/ti/knav_dma.c @@ -355,7 +355,7 @@ static void dma_debug_show_devices(struct seq_file *s, } } -static int dma_debug_show(struct seq_file *s, void *v) +static int knav_dma_debug_show(struct seq_file *s, void *v) { struct knav_dma_device *dma; @@ -370,17 +370,7 @@ static int dma_debug_show(struct seq_file *s, void *v) return 0; } -static int knav_dma_debug_open(struct inode *inode, struct file *file) -{ - return single_open(file, dma_debug_show, NULL); -} - -static const struct file_operations knav_dma_debug_ops = { - .open = knav_dma_debug_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(knav_dma_debug); static int of_channel_match_helper(struct device_node *np, const char *name, const char **dma_instance) @@ -778,7 +768,7 @@ static int knav_dma_probe(struct platform_device *pdev) } debugfs_create_file("knav_dma", S_IFREG | S_IRUGO, NULL, NULL, - &knav_dma_debug_ops); + &knav_dma_debug_fops); device_ready = true; return ret; diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c index aa071d96ef36..a460f201bf8e 100644 --- a/drivers/soc/ti/knav_qmss_queue.c +++ b/drivers/soc/ti/knav_qmss_queue.c @@ -478,17 +478,7 @@ static int knav_queue_debug_show(struct seq_file *s, void *v) return 0; } -static int knav_queue_debug_open(struct inode *inode, struct file *file) -{ - return single_open(file, knav_queue_debug_show, NULL); -} - -static const struct file_operations knav_queue_debug_ops = { - .open = knav_queue_debug_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; +DEFINE_SHOW_ATTRIBUTE(knav_queue_debug); static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout, u32 flags) @@ -1878,7 +1868,7 @@ static int knav_queue_probe(struct platform_device *pdev) } debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL, - &knav_queue_debug_ops); + &knav_queue_debug_fops); device_ready = true; return 0; diff --git a/drivers/soc/ti/omap_prm.c b/drivers/soc/ti/omap_prm.c index c9b3f9ebf0bb..980b04c38fd9 100644 --- a/drivers/soc/ti/omap_prm.c +++ b/drivers/soc/ti/omap_prm.c @@ -10,14 +10,39 @@ #include <linux/device.h> #include <linux/io.h> #include <linux/iopoll.h> +#include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/pm_domain.h> #include <linux/reset-controller.h> #include <linux/delay.h> #include <linux/platform_data/ti-prm.h> +enum omap_prm_domain_mode { + OMAP_PRMD_OFF, + OMAP_PRMD_RETENTION, + OMAP_PRMD_ON_INACTIVE, + OMAP_PRMD_ON_ACTIVE, +}; + +struct omap_prm_domain_map { + unsigned int usable_modes; /* Mask of hardware supported modes */ + unsigned long statechange:1; /* Optional low-power state change */ + unsigned long logicretstate:1; /* Optional logic off mode */ +}; + +struct omap_prm_domain { + struct device *dev; + struct omap_prm *prm; + struct generic_pm_domain pd; + u16 pwrstctrl; + u16 pwrstst; + const struct omap_prm_domain_map *cap; + u32 pwrstctrl_saved; +}; + struct omap_rst_map { s8 rst; s8 st; @@ -27,6 +52,9 @@ struct omap_prm_data { u32 base; const char *name; const char *clkdm_name; + u16 pwrstctrl; + u16 pwrstst; + const struct omap_prm_domain_map *dmap; u16 rstctrl; u16 rstst; const struct omap_rst_map *rstmap; @@ -36,6 +64,7 @@ struct omap_prm_data { struct omap_prm { const struct omap_prm_data *data; void __iomem *base; + struct omap_prm_domain *prmd; }; struct omap_reset_data { @@ -47,6 +76,7 @@ struct omap_reset_data { struct device *dev; }; +#define genpd_to_prm_domain(gpd) container_of(gpd, struct omap_prm_domain, pd) #define to_omap_reset_data(p) container_of((p), struct omap_reset_data, rcdev) #define OMAP_MAX_RESETS 8 @@ -58,6 +88,39 @@ struct omap_reset_data { #define OMAP_PRM_HAS_RESETS (OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_RSTST) +#define PRM_STATE_MAX_WAIT 10000 +#define PRM_LOGICRETSTATE BIT(2) +#define PRM_LOWPOWERSTATECHANGE BIT(4) +#define PRM_POWERSTATE_MASK OMAP_PRMD_ON_ACTIVE + +#define PRM_ST_INTRANSITION BIT(20) + +static const struct omap_prm_domain_map omap_prm_all = { + .usable_modes = BIT(OMAP_PRMD_ON_ACTIVE) | BIT(OMAP_PRMD_ON_INACTIVE) | + BIT(OMAP_PRMD_RETENTION) | BIT(OMAP_PRMD_OFF), + .statechange = 1, + .logicretstate = 1, +}; + +static const struct omap_prm_domain_map omap_prm_noinact = { + .usable_modes = BIT(OMAP_PRMD_ON_ACTIVE) | BIT(OMAP_PRMD_RETENTION) | + BIT(OMAP_PRMD_OFF), + .statechange = 1, + .logicretstate = 1, +}; + +static const struct omap_prm_domain_map omap_prm_nooff = { + .usable_modes = BIT(OMAP_PRMD_ON_ACTIVE) | BIT(OMAP_PRMD_ON_INACTIVE) | + BIT(OMAP_PRMD_RETENTION), + .statechange = 1, + .logicretstate = 1, +}; + +static const struct omap_prm_domain_map omap_prm_onoff_noauto = { + .usable_modes = BIT(OMAP_PRMD_ON_ACTIVE) | BIT(OMAP_PRMD_OFF), + .statechange = 1, +}; + static const struct omap_rst_map rst_map_0[] = { { .rst = 0, .st = 0 }, { .rst = -1 }, @@ -78,6 +141,10 @@ static const struct omap_rst_map rst_map_012[] = { static const struct omap_prm_data omap4_prm_data[] = { { .name = "tesla", .base = 0x4a306400, .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_01 }, + { + .name = "abe", .base = 0x4a306500, + .pwrstctrl = 0, .pwrstst = 0x4, .dmap = &omap_prm_all, + }, { .name = "core", .base = 0x4a306700, .rstctrl = 0x210, .rstst = 0x214, .clkdm_name = "ducati", .rstmap = rst_map_012 }, { .name = "ivahd", .base = 0x4a306f00, .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_012 }, { .name = "device", .base = 0x4a307b00, .rstctrl = 0x0, .rstst = 0x4, .rstmap = rst_map_01, .flags = OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_NO_CLKDM }, @@ -86,6 +153,10 @@ static const struct omap_prm_data omap4_prm_data[] = { static const struct omap_prm_data omap5_prm_data[] = { { .name = "dsp", .base = 0x4ae06400, .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_01 }, + { + .name = "abe", .base = 0x4ae06500, + .pwrstctrl = 0, .pwrstst = 0x4, .dmap = &omap_prm_nooff, + }, { .name = "core", .base = 0x4ae06700, .rstctrl = 0x210, .rstst = 0x214, .clkdm_name = "ipu", .rstmap = rst_map_012 }, { .name = "iva", .base = 0x4ae07200, .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_012 }, { .name = "device", .base = 0x4ae07c00, .rstctrl = 0x0, .rstst = 0x4, .rstmap = rst_map_01, .flags = OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_NO_CLKDM }, @@ -119,7 +190,11 @@ static const struct omap_prm_data am3_prm_data[] = { { .name = "per", .base = 0x44e00c00, .rstctrl = 0x0, .rstmap = am3_per_rst_map, .flags = OMAP_PRM_HAS_RSTCTRL, .clkdm_name = "pruss_ocp" }, { .name = "wkup", .base = 0x44e00d00, .rstctrl = 0x0, .rstst = 0xc, .rstmap = am3_wkup_rst_map, .flags = OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_NO_CLKDM }, { .name = "device", .base = 0x44e00f00, .rstctrl = 0x0, .rstst = 0x8, .rstmap = rst_map_01, .flags = OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_NO_CLKDM }, - { .name = "gfx", .base = 0x44e01100, .rstctrl = 0x4, .rstst = 0x14, .rstmap = rst_map_0, .clkdm_name = "gfx_l3" }, + { + .name = "gfx", .base = 0x44e01100, + .pwrstctrl = 0, .pwrstst = 0x10, .dmap = &omap_prm_noinact, + .rstctrl = 0x4, .rstst = 0x14, .rstmap = rst_map_0, .clkdm_name = "gfx_l3", + }, { }, }; @@ -135,7 +210,11 @@ static const struct omap_rst_map am4_device_rst_map[] = { }; static const struct omap_prm_data am4_prm_data[] = { - { .name = "gfx", .base = 0x44df0400, .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_0, .clkdm_name = "gfx_l3" }, + { + .name = "gfx", .base = 0x44df0400, + .pwrstctrl = 0, .pwrstst = 0x4, .dmap = &omap_prm_onoff_noauto, + .rstctrl = 0x10, .rstst = 0x14, .rstmap = rst_map_0, .clkdm_name = "gfx_l3", + }, { .name = "per", .base = 0x44df0800, .rstctrl = 0x10, .rstst = 0x14, .rstmap = am4_per_rst_map, .clkdm_name = "pruss_ocp" }, { .name = "wkup", .base = 0x44df2000, .rstctrl = 0x10, .rstst = 0x14, .rstmap = am3_wkup_rst_map, .flags = OMAP_PRM_HAS_NO_CLKDM }, { .name = "device", .base = 0x44df4000, .rstctrl = 0x0, .rstst = 0x4, .rstmap = am4_device_rst_map, .flags = OMAP_PRM_HAS_RSTCTRL | OMAP_PRM_HAS_NO_CLKDM }, @@ -151,6 +230,180 @@ static const struct of_device_id omap_prm_id_table[] = { { }, }; +#ifdef DEBUG +static void omap_prm_domain_show_state(struct omap_prm_domain *prmd, + const char *desc) +{ + dev_dbg(prmd->dev, "%s %s: %08x/%08x\n", + prmd->pd.name, desc, + readl_relaxed(prmd->prm->base + prmd->pwrstctrl), + readl_relaxed(prmd->prm->base + prmd->pwrstst)); +} +#else +static inline void omap_prm_domain_show_state(struct omap_prm_domain *prmd, + const char *desc) +{ +} +#endif + +static int omap_prm_domain_power_on(struct generic_pm_domain *domain) +{ + struct omap_prm_domain *prmd; + int ret; + u32 v; + + prmd = genpd_to_prm_domain(domain); + if (!prmd->cap) + return 0; + + omap_prm_domain_show_state(prmd, "on: previous state"); + + if (prmd->pwrstctrl_saved) + v = prmd->pwrstctrl_saved; + else + v = readl_relaxed(prmd->prm->base + prmd->pwrstctrl); + + writel_relaxed(v | OMAP_PRMD_ON_ACTIVE, + prmd->prm->base + prmd->pwrstctrl); + + /* wait for the transition bit to get cleared */ + ret = readl_relaxed_poll_timeout(prmd->prm->base + prmd->pwrstst, + v, !(v & PRM_ST_INTRANSITION), 1, + PRM_STATE_MAX_WAIT); + if (ret) + dev_err(prmd->dev, "%s: %s timed out\n", + prmd->pd.name, __func__); + + omap_prm_domain_show_state(prmd, "on: new state"); + + return ret; +} + +/* No need to check for holes in the mask for the lowest mode */ +static int omap_prm_domain_find_lowest(struct omap_prm_domain *prmd) +{ + return __ffs(prmd->cap->usable_modes); +} + +static int omap_prm_domain_power_off(struct generic_pm_domain *domain) +{ + struct omap_prm_domain *prmd; + int ret; + u32 v; + + prmd = genpd_to_prm_domain(domain); + if (!prmd->cap) + return 0; + + omap_prm_domain_show_state(prmd, "off: previous state"); + + v = readl_relaxed(prmd->prm->base + prmd->pwrstctrl); + prmd->pwrstctrl_saved = v; + + v &= ~PRM_POWERSTATE_MASK; + v |= omap_prm_domain_find_lowest(prmd); + + if (prmd->cap->statechange) + v |= PRM_LOWPOWERSTATECHANGE; + if (prmd->cap->logicretstate) + v &= ~PRM_LOGICRETSTATE; + else + v |= PRM_LOGICRETSTATE; + + writel_relaxed(v, prmd->prm->base + prmd->pwrstctrl); + + /* wait for the transition bit to get cleared */ + ret = readl_relaxed_poll_timeout(prmd->prm->base + prmd->pwrstst, + v, !(v & PRM_ST_INTRANSITION), 1, + PRM_STATE_MAX_WAIT); + if (ret) + dev_warn(prmd->dev, "%s: %s timed out\n", + __func__, prmd->pd.name); + + omap_prm_domain_show_state(prmd, "off: new state"); + + return 0; +} + +static int omap_prm_domain_attach_dev(struct generic_pm_domain *domain, + struct device *dev) +{ + struct generic_pm_domain_data *genpd_data; + struct of_phandle_args pd_args; + struct omap_prm_domain *prmd; + struct device_node *np; + int ret; + + prmd = genpd_to_prm_domain(domain); + np = dev->of_node; + + ret = of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", 0, &pd_args); + if (ret < 0) + return ret; + + if (pd_args.args_count != 0) + dev_warn(dev, "%s: unusupported #power-domain-cells: %i\n", + prmd->pd.name, pd_args.args_count); + + genpd_data = dev_gpd_data(dev); + genpd_data->data = NULL; + + return 0; +} + +static void omap_prm_domain_detach_dev(struct generic_pm_domain *domain, + struct device *dev) +{ + struct generic_pm_domain_data *genpd_data; + + genpd_data = dev_gpd_data(dev); + genpd_data->data = NULL; +} + +static int omap_prm_domain_init(struct device *dev, struct omap_prm *prm) +{ + struct omap_prm_domain *prmd; + struct device_node *np = dev->of_node; + const struct omap_prm_data *data; + const char *name; + int error; + + if (!of_find_property(dev->of_node, "#power-domain-cells", NULL)) + return 0; + + of_node_put(dev->of_node); + + prmd = devm_kzalloc(dev, sizeof(*prmd), GFP_KERNEL); + if (!prmd) + return -ENOMEM; + + data = prm->data; + name = devm_kasprintf(dev, GFP_KERNEL, "prm_%s", + data->name); + + prmd->dev = dev; + prmd->prm = prm; + prmd->cap = prmd->prm->data->dmap; + prmd->pwrstctrl = prmd->prm->data->pwrstctrl; + prmd->pwrstst = prmd->prm->data->pwrstst; + + prmd->pd.name = name; + prmd->pd.power_on = omap_prm_domain_power_on; + prmd->pd.power_off = omap_prm_domain_power_off; + prmd->pd.attach_dev = omap_prm_domain_attach_dev; + prmd->pd.detach_dev = omap_prm_domain_detach_dev; + + pm_genpd_init(&prmd->pd, NULL, true); + error = of_genpd_add_provider_simple(np, &prmd->pd); + if (error) + pm_genpd_remove(&prmd->pd); + else + prm->prmd = prmd; + + return error; +} + static bool _is_valid_reset(struct omap_reset_data *reset, unsigned long id) { if (reset->mask & BIT(id)) @@ -351,6 +604,7 @@ static int omap_prm_probe(struct platform_device *pdev) const struct omap_prm_data *data; struct omap_prm *prm; const struct of_device_id *match; + int ret; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) @@ -378,7 +632,21 @@ static int omap_prm_probe(struct platform_device *pdev) if (IS_ERR(prm->base)) return PTR_ERR(prm->base); - return omap_prm_reset_init(pdev, prm); + ret = omap_prm_domain_init(&pdev->dev, prm); + if (ret) + return ret; + + ret = omap_prm_reset_init(pdev, prm); + if (ret) + goto err_domain; + + return 0; + +err_domain: + of_genpd_del_provider(pdev->dev.of_node); + pm_genpd_remove(&prm->prmd->pd); + + return ret; } static struct platform_driver omap_prm_driver = { diff --git a/drivers/soc/ti/pm33xx.c b/drivers/soc/ti/pm33xx.c index de0123ec8ad6..d2f5e7001a93 100644 --- a/drivers/soc/ti/pm33xx.c +++ b/drivers/soc/ti/pm33xx.c @@ -16,6 +16,7 @@ #include <linux/module.h> #include <linux/nvmem-consumer.h> #include <linux/of.h> +#include <linux/of_address.h> #include <linux/platform_data/pm33xx.h> #include <linux/platform_device.h> #include <linux/rtc.h> @@ -39,6 +40,8 @@ #define GIC_INT_SET_PENDING_BASE 0x200 #define AM43XX_GIC_DIST_BASE 0x48241000 +static void __iomem *rtc_base_virt; +static struct clk *rtc_fck; static u32 rtc_magic_val; static int (*am33xx_do_wfi_sram)(unsigned long unused); @@ -90,7 +93,7 @@ static int am33xx_push_sram_idle(void) ro_sram_data.amx3_pm_sram_data_virt = ocmcram_location_data; ro_sram_data.amx3_pm_sram_data_phys = gen_pool_virt_to_phys(sram_pool_data, ocmcram_location_data); - ro_sram_data.rtc_base_virt = pm_ops->get_rtc_base_addr(); + ro_sram_data.rtc_base_virt = rtc_base_virt; /* Save physical address to calculate resume offset during pm init */ am33xx_do_wfi_sram_phys = gen_pool_virt_to_phys(sram_pool, @@ -158,7 +161,7 @@ static struct wkup_m3_wakeup_src rtc_wake_src(void) { u32 i; - i = __raw_readl(pm_ops->get_rtc_base_addr() + 0x44) & 0x40; + i = __raw_readl(rtc_base_virt + 0x44) & 0x40; if (i) { retrigger_irq = rtc_alarm_wakeup.irq_nr; @@ -177,13 +180,24 @@ static int am33xx_rtc_only_idle(unsigned long wfi_flags) return 0; } +/* + * Note that the RTC module clock must be re-enabled only for rtc+ddr suspend. + * And looks like the module can stay in SYSC_IDLE_SMART_WKUP mode configured + * by the interconnect code just fine for both rtc+ddr suspend and retention + * suspend. + */ static int am33xx_pm_suspend(suspend_state_t suspend_state) { int i, ret = 0; if (suspend_state == PM_SUSPEND_MEM && pm_ops->check_off_mode_enable()) { - pm_ops->prepare_rtc_suspend(); + ret = clk_prepare_enable(rtc_fck); + if (ret) { + dev_err(pm33xx_dev, "Failed to enable clock: %i\n", ret); + return ret; + } + pm_ops->save_context(); suspend_wfi_flags |= WFI_FLAG_RTC_ONLY; clk_save_context(); @@ -236,7 +250,7 @@ static int am33xx_pm_suspend(suspend_state_t suspend_state) } if (suspend_state == PM_SUSPEND_MEM && pm_ops->check_off_mode_enable()) - pm_ops->prepare_rtc_resume(); + clk_disable_unprepare(rtc_fck); return ret; } @@ -425,14 +439,28 @@ static int am33xx_pm_rtc_setup(void) struct device_node *np; unsigned long val = 0; struct nvmem_device *nvmem; + int error; np = of_find_node_by_name(NULL, "rtc"); if (of_device_is_available(np)) { + /* RTC interconnect target module clock */ + rtc_fck = of_clk_get_by_name(np->parent, "fck"); + if (IS_ERR(rtc_fck)) + return PTR_ERR(rtc_fck); + + rtc_base_virt = of_iomap(np, 0); + if (!rtc_base_virt) { + pr_warn("PM: could not iomap rtc"); + error = -ENODEV; + goto err_clk_put; + } + omap_rtc = rtc_class_open("rtc0"); if (!omap_rtc) { pr_warn("PM: rtc0 not available"); - return -EPROBE_DEFER; + error = -EPROBE_DEFER; + goto err_iounmap; } nvmem = devm_nvmem_device_get(&omap_rtc->dev, @@ -454,6 +482,13 @@ static int am33xx_pm_rtc_setup(void) } return 0; + +err_iounmap: + iounmap(rtc_base_virt); +err_clk_put: + clk_put(rtc_fck); + + return error; } static int am33xx_pm_probe(struct platform_device *pdev) @@ -544,6 +579,8 @@ static int am33xx_pm_remove(struct platform_device *pdev) suspend_set_ops(NULL); wkup_m3_ipc_put(m3_ipc); am33xx_pm_free_sram(); + iounmap(rtc_base_virt); + clk_put(rtc_fck); return 0; } diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c new file mode 100644 index 000000000000..cc0b4ad7a3d3 --- /dev/null +++ b/drivers/soc/ti/pruss.c @@ -0,0 +1,354 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PRU-ICSS platform driver for various TI SoCs + * + * Copyright (C) 2014-2020 Texas Instruments Incorporated - http://www.ti.com/ + * Author(s): + * Suman Anna <s-anna@ti.com> + * Andrew F. Davis <afd@ti.com> + */ + +#include <linux/clk-provider.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> +#include <linux/pruss_driver.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +/** + * struct pruss_private_data - PRUSS driver private data + * @has_no_sharedram: flag to indicate the absence of PRUSS Shared Data RAM + * @has_core_mux_clock: flag to indicate the presence of PRUSS core clock + */ +struct pruss_private_data { + bool has_no_sharedram; + bool has_core_mux_clock; +}; + +static void pruss_of_free_clk_provider(void *data) +{ + struct device_node *clk_mux_np = data; + + of_clk_del_provider(clk_mux_np); + of_node_put(clk_mux_np); +} + +static int pruss_clk_mux_setup(struct pruss *pruss, struct clk *clk_mux, + char *mux_name, struct device_node *clks_np) +{ + struct device_node *clk_mux_np; + struct device *dev = pruss->dev; + char *clk_mux_name; + unsigned int num_parents; + const char **parent_names; + void __iomem *reg; + u32 reg_offset; + int ret; + + clk_mux_np = of_get_child_by_name(clks_np, mux_name); + if (!clk_mux_np) { + dev_err(dev, "%pOF is missing its '%s' node\n", clks_np, + mux_name); + return -ENODEV; + } + + num_parents = of_clk_get_parent_count(clk_mux_np); + if (num_parents < 1) { + dev_err(dev, "mux-clock %pOF must have parents\n", clk_mux_np); + ret = -EINVAL; + goto put_clk_mux_np; + } + + parent_names = devm_kcalloc(dev, sizeof(*parent_names), num_parents, + GFP_KERNEL); + if (!parent_names) { + ret = -ENOMEM; + goto put_clk_mux_np; + } + + of_clk_parent_fill(clk_mux_np, parent_names, num_parents); + + clk_mux_name = devm_kasprintf(dev, GFP_KERNEL, "%s.%pOFn", + dev_name(dev), clk_mux_np); + if (!clk_mux_name) { + ret = -ENOMEM; + goto put_clk_mux_np; + } + + ret = of_property_read_u32(clk_mux_np, "reg", ®_offset); + if (ret) + goto put_clk_mux_np; + + reg = pruss->cfg_base + reg_offset; + + clk_mux = clk_register_mux(NULL, clk_mux_name, parent_names, + num_parents, 0, reg, 0, 1, 0, NULL); + if (IS_ERR(clk_mux)) { + ret = PTR_ERR(clk_mux); + goto put_clk_mux_np; + } + + ret = devm_add_action_or_reset(dev, (void(*)(void *))clk_unregister_mux, + clk_mux); + if (ret) { + dev_err(dev, "failed to add clkmux unregister action %d", ret); + goto put_clk_mux_np; + } + + ret = of_clk_add_provider(clk_mux_np, of_clk_src_simple_get, clk_mux); + if (ret) + goto put_clk_mux_np; + + ret = devm_add_action_or_reset(dev, pruss_of_free_clk_provider, + clk_mux_np); + if (ret) { + dev_err(dev, "failed to add clkmux free action %d", ret); + goto put_clk_mux_np; + } + + return 0; + +put_clk_mux_np: + of_node_put(clk_mux_np); + return ret; +} + +static int pruss_clk_init(struct pruss *pruss, struct device_node *cfg_node) +{ + const struct pruss_private_data *data; + struct device_node *clks_np; + struct device *dev = pruss->dev; + int ret = 0; + + data = of_device_get_match_data(dev); + if (IS_ERR(data)) + return -ENODEV; + + clks_np = of_get_child_by_name(cfg_node, "clocks"); + if (!clks_np) { + dev_err(dev, "%pOF is missing its 'clocks' node\n", clks_np); + return -ENODEV; + } + + if (data && data->has_core_mux_clock) { + ret = pruss_clk_mux_setup(pruss, pruss->core_clk_mux, + "coreclk-mux", clks_np); + if (ret) { + dev_err(dev, "failed to setup coreclk-mux\n"); + goto put_clks_node; + } + } + + ret = pruss_clk_mux_setup(pruss, pruss->iep_clk_mux, "iepclk-mux", + clks_np); + if (ret) { + dev_err(dev, "failed to setup iepclk-mux\n"); + goto put_clks_node; + } + +put_clks_node: + of_node_put(clks_np); + + return ret; +} + +static struct regmap_config regmap_conf = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int pruss_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct device_node *child; + struct pruss *pruss; + struct resource res; + int ret, i, index; + const struct pruss_private_data *data; + const char *mem_names[PRUSS_MEM_MAX] = { "dram0", "dram1", "shrdram2" }; + + data = of_device_get_match_data(&pdev->dev); + if (IS_ERR(data)) { + dev_err(dev, "missing private data\n"); + return -ENODEV; + } + + ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(dev, "failed to set the DMA coherent mask"); + return ret; + } + + pruss = devm_kzalloc(dev, sizeof(*pruss), GFP_KERNEL); + if (!pruss) + return -ENOMEM; + + pruss->dev = dev; + + child = of_get_child_by_name(np, "memories"); + if (!child) { + dev_err(dev, "%pOF is missing its 'memories' node\n", child); + return -ENODEV; + } + + for (i = 0; i < PRUSS_MEM_MAX; i++) { + /* + * On AM437x one of two PRUSS units don't contain Shared RAM, + * skip it + */ + if (data && data->has_no_sharedram && i == PRUSS_MEM_SHRD_RAM2) + continue; + + index = of_property_match_string(child, "reg-names", + mem_names[i]); + if (index < 0) { + of_node_put(child); + return index; + } + + if (of_address_to_resource(child, index, &res)) { + of_node_put(child); + return -EINVAL; + } + + pruss->mem_regions[i].va = devm_ioremap(dev, res.start, + resource_size(&res)); + if (!pruss->mem_regions[i].va) { + dev_err(dev, "failed to parse and map memory resource %d %s\n", + i, mem_names[i]); + of_node_put(child); + return -ENOMEM; + } + pruss->mem_regions[i].pa = res.start; + pruss->mem_regions[i].size = resource_size(&res); + + dev_dbg(dev, "memory %8s: pa %pa size 0x%zx va %pK\n", + mem_names[i], &pruss->mem_regions[i].pa, + pruss->mem_regions[i].size, pruss->mem_regions[i].va); + } + of_node_put(child); + + platform_set_drvdata(pdev, pruss); + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "couldn't enable module\n"); + pm_runtime_put_noidle(dev); + goto rpm_disable; + } + + child = of_get_child_by_name(np, "cfg"); + if (!child) { + dev_err(dev, "%pOF is missing its 'cfg' node\n", child); + ret = -ENODEV; + goto rpm_put; + } + + if (of_address_to_resource(child, 0, &res)) { + ret = -ENOMEM; + goto node_put; + } + + pruss->cfg_base = devm_ioremap(dev, res.start, resource_size(&res)); + if (!pruss->cfg_base) { + ret = -ENOMEM; + goto node_put; + } + + regmap_conf.name = kasprintf(GFP_KERNEL, "%pOFn@%llx", child, + (u64)res.start); + regmap_conf.max_register = resource_size(&res) - 4; + + pruss->cfg_regmap = devm_regmap_init_mmio(dev, pruss->cfg_base, + ®map_conf); + kfree(regmap_conf.name); + if (IS_ERR(pruss->cfg_regmap)) { + dev_err(dev, "regmap_init_mmio failed for cfg, ret = %ld\n", + PTR_ERR(pruss->cfg_regmap)); + ret = PTR_ERR(pruss->cfg_regmap); + goto node_put; + } + + ret = pruss_clk_init(pruss, child); + if (ret) { + dev_err(dev, "failed to setup coreclk-mux\n"); + goto node_put; + } + + ret = devm_of_platform_populate(dev); + if (ret) { + dev_err(dev, "failed to register child devices\n"); + goto node_put; + } + + of_node_put(child); + + return 0; + +node_put: + of_node_put(child); +rpm_put: + pm_runtime_put_sync(dev); +rpm_disable: + pm_runtime_disable(dev); + return ret; +} + +static int pruss_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + devm_of_platform_depopulate(dev); + + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + return 0; +} + +/* instance-specific driver private data */ +static const struct pruss_private_data am437x_pruss1_data = { + .has_no_sharedram = false, +}; + +static const struct pruss_private_data am437x_pruss0_data = { + .has_no_sharedram = true, +}; + +static const struct pruss_private_data am65x_j721e_pruss_data = { + .has_core_mux_clock = true, +}; + +static const struct of_device_id pruss_of_match[] = { + { .compatible = "ti,am3356-pruss" }, + { .compatible = "ti,am4376-pruss0", .data = &am437x_pruss0_data, }, + { .compatible = "ti,am4376-pruss1", .data = &am437x_pruss1_data, }, + { .compatible = "ti,am5728-pruss" }, + { .compatible = "ti,k2g-pruss" }, + { .compatible = "ti,am654-icssg", .data = &am65x_j721e_pruss_data, }, + { .compatible = "ti,j721e-icssg", .data = &am65x_j721e_pruss_data, }, + {}, +}; +MODULE_DEVICE_TABLE(of, pruss_of_match); + +static struct platform_driver pruss_driver = { + .driver = { + .name = "pruss", + .of_match_table = pruss_of_match, + }, + .probe = pruss_probe, + .remove = pruss_remove, +}; +module_platform_driver(pruss_driver); + +MODULE_AUTHOR("Suman Anna <s-anna@ti.com>"); +MODULE_DESCRIPTION("PRU-ICSS Subsystem Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/soc/ti/smartreflex.c b/drivers/soc/ti/smartreflex.c new file mode 100644 index 000000000000..5376f3d22f31 --- /dev/null +++ b/drivers/soc/ti/smartreflex.c @@ -0,0 +1,1045 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * OMAP SmartReflex Voltage Control + * + * Author: Thara Gopinath <thara@ti.com> + * + * Copyright (C) 2012 Texas Instruments, Inc. + * Thara Gopinath <thara@ti.com> + * + * Copyright (C) 2008 Nokia Corporation + * Kalle Jokiniemi + * + * Copyright (C) 2007 Texas Instruments, Inc. + * Lesly A M <x0080970@ti.com> + */ + +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/interrupt.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/pm_runtime.h> +#include <linux/power/smartreflex.h> + +#define DRIVER_NAME "smartreflex" +#define SMARTREFLEX_NAME_LEN 32 +#define NVALUE_NAME_LEN 40 +#define SR_DISABLE_TIMEOUT 200 + +/* sr_list contains all the instances of smartreflex module */ +static LIST_HEAD(sr_list); + +static struct omap_sr_class_data *sr_class; +static struct dentry *sr_dbg_dir; + +static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value) +{ + __raw_writel(value, (sr->base + offset)); +} + +static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask, + u32 value) +{ + u32 reg_val; + + /* + * Smartreflex error config register is special as it contains + * certain status bits which if written a 1 into means a clear + * of those bits. So in order to make sure no accidental write of + * 1 happens to those status bits, do a clear of them in the read + * value. This mean this API doesn't rewrite values in these bits + * if they are currently set, but does allow the caller to write + * those bits. + */ + if (sr->ip_type == SR_TYPE_V1 && offset == ERRCONFIG_V1) + mask |= ERRCONFIG_STATUS_V1_MASK; + else if (sr->ip_type == SR_TYPE_V2 && offset == ERRCONFIG_V2) + mask |= ERRCONFIG_VPBOUNDINTST_V2; + + reg_val = __raw_readl(sr->base + offset); + reg_val &= ~mask; + + value &= mask; + + reg_val |= value; + + __raw_writel(reg_val, (sr->base + offset)); +} + +static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset) +{ + return __raw_readl(sr->base + offset); +} + +static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm) +{ + struct omap_sr *sr_info; + + if (!voltdm) { + pr_err("%s: Null voltage domain passed!\n", __func__); + return ERR_PTR(-EINVAL); + } + + list_for_each_entry(sr_info, &sr_list, node) { + if (voltdm == sr_info->voltdm) + return sr_info; + } + + return ERR_PTR(-ENODATA); +} + +static irqreturn_t sr_interrupt(int irq, void *data) +{ + struct omap_sr *sr_info = data; + u32 status = 0; + + switch (sr_info->ip_type) { + case SR_TYPE_V1: + /* Read the status bits */ + status = sr_read_reg(sr_info, ERRCONFIG_V1); + + /* Clear them by writing back */ + sr_write_reg(sr_info, ERRCONFIG_V1, status); + break; + case SR_TYPE_V2: + /* Read the status bits */ + status = sr_read_reg(sr_info, IRQSTATUS); + + /* Clear them by writing back */ + sr_write_reg(sr_info, IRQSTATUS, status); + break; + default: + dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n", + sr_info->ip_type); + return IRQ_NONE; + } + + if (sr_class->notify) + sr_class->notify(sr_info, status); + + return IRQ_HANDLED; +} + +static void sr_set_clk_length(struct omap_sr *sr) +{ + struct clk *fck; + u32 fclk_speed; + + /* Try interconnect target module fck first if it already exists */ + fck = clk_get(sr->pdev->dev.parent, "fck"); + if (IS_ERR(fck)) { + fck = clk_get(&sr->pdev->dev, "fck"); + if (IS_ERR(fck)) { + dev_err(&sr->pdev->dev, + "%s: unable to get fck for device %s\n", + __func__, dev_name(&sr->pdev->dev)); + return; + } + } + + fclk_speed = clk_get_rate(fck); + clk_put(fck); + + switch (fclk_speed) { + case 12000000: + sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK; + break; + case 13000000: + sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK; + break; + case 19200000: + sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK; + break; + case 26000000: + sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK; + break; + case 38400000: + sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK; + break; + default: + dev_err(&sr->pdev->dev, "%s: Invalid fclk rate: %d\n", + __func__, fclk_speed); + break; + } +} + +static void sr_start_vddautocomp(struct omap_sr *sr) +{ + if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) { + dev_warn(&sr->pdev->dev, + "%s: smartreflex class driver not registered\n", + __func__); + return; + } + + if (!sr_class->enable(sr)) + sr->autocomp_active = true; +} + +static void sr_stop_vddautocomp(struct omap_sr *sr) +{ + if (!sr_class || !(sr_class->disable)) { + dev_warn(&sr->pdev->dev, + "%s: smartreflex class driver not registered\n", + __func__); + return; + } + + if (sr->autocomp_active) { + sr_class->disable(sr, 1); + sr->autocomp_active = false; + } +} + +/* + * This function handles the initializations which have to be done + * only when both sr device and class driver regiter has + * completed. This will be attempted to be called from both sr class + * driver register and sr device intializtion API's. Only one call + * will ultimately succeed. + * + * Currently this function registers interrupt handler for a particular SR + * if smartreflex class driver is already registered and has + * requested for interrupts and the SR interrupt line in present. + */ +static int sr_late_init(struct omap_sr *sr_info) +{ + struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data; + int ret = 0; + + if (sr_class->notify && sr_class->notify_flags && sr_info->irq) { + ret = devm_request_irq(&sr_info->pdev->dev, sr_info->irq, + sr_interrupt, 0, sr_info->name, sr_info); + if (ret) + goto error; + disable_irq(sr_info->irq); + } + + if (pdata && pdata->enable_on_init) + sr_start_vddautocomp(sr_info); + + return ret; + +error: + list_del(&sr_info->node); + dev_err(&sr_info->pdev->dev, "%s: ERROR in registering interrupt handler. Smartreflex will not function as desired\n", + __func__); + + return ret; +} + +static void sr_v1_disable(struct omap_sr *sr) +{ + int timeout = 0; + int errconf_val = ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST | + ERRCONFIG_MCUBOUNDINTST; + + /* Enable MCUDisableAcknowledge interrupt */ + sr_modify_reg(sr, ERRCONFIG_V1, + ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN); + + /* SRCONFIG - disable SR */ + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0); + + /* Disable all other SR interrupts and clear the status as needed */ + if (sr_read_reg(sr, ERRCONFIG_V1) & ERRCONFIG_VPBOUNDINTST_V1) + errconf_val |= ERRCONFIG_VPBOUNDINTST_V1; + sr_modify_reg(sr, ERRCONFIG_V1, + (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN | + ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1), + errconf_val); + + /* + * Wait for SR to be disabled. + * wait until ERRCONFIG.MCUDISACKINTST = 1. Typical latency is 1us. + */ + sr_test_cond_timeout((sr_read_reg(sr, ERRCONFIG_V1) & + ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT, + timeout); + + if (timeout >= SR_DISABLE_TIMEOUT) + dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n", + __func__); + + /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */ + sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN, + ERRCONFIG_MCUDISACKINTST); +} + +static void sr_v2_disable(struct omap_sr *sr) +{ + int timeout = 0; + + /* Enable MCUDisableAcknowledge interrupt */ + sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT); + + /* SRCONFIG - disable SR */ + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0); + + /* + * Disable all other SR interrupts and clear the status + * write to status register ONLY on need basis - only if status + * is set. + */ + if (sr_read_reg(sr, ERRCONFIG_V2) & ERRCONFIG_VPBOUNDINTST_V2) + sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2, + ERRCONFIG_VPBOUNDINTST_V2); + else + sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2, + 0x0); + sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT | + IRQENABLE_MCUVALIDINT | + IRQENABLE_MCUBOUNDSINT)); + sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT | + IRQSTATUS_MCVALIDINT | + IRQSTATUS_MCBOUNDSINT)); + + /* + * Wait for SR to be disabled. + * wait until IRQSTATUS.MCUDISACKINTST = 1. Typical latency is 1us. + */ + sr_test_cond_timeout((sr_read_reg(sr, IRQSTATUS) & + IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT, + timeout); + + if (timeout >= SR_DISABLE_TIMEOUT) + dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n", + __func__); + + /* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */ + sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT); + sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT); +} + +static struct omap_sr_nvalue_table *sr_retrieve_nvalue_row( + struct omap_sr *sr, u32 efuse_offs) +{ + int i; + + if (!sr->nvalue_table) { + dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n", + __func__); + return NULL; + } + + for (i = 0; i < sr->nvalue_count; i++) { + if (sr->nvalue_table[i].efuse_offs == efuse_offs) + return &sr->nvalue_table[i]; + } + + return NULL; +} + +/* Public Functions */ + +/** + * sr_configure_errgen() - Configures the SmartReflex to perform AVS using the + * error generator module. + * @sr: SR module to be configured. + * + * This API is to be called from the smartreflex class driver to + * configure the error generator module inside the smartreflex module. + * SR settings if using the ERROR module inside Smartreflex. + * SR CLASS 3 by default uses only the ERROR module where as + * SR CLASS 2 can choose between ERROR module and MINMAXAVG + * module. Returns 0 on success and error value in case of failure. + */ +int sr_configure_errgen(struct omap_sr *sr) +{ + u32 sr_config, sr_errconfig, errconfig_offs; + u32 vpboundint_en, vpboundint_st; + u32 senp_en = 0, senn_en = 0; + u8 senp_shift, senn_shift; + + if (!sr) { + pr_warn("%s: NULL omap_sr from %pS\n", + __func__, (void *)_RET_IP_); + return -EINVAL; + } + + if (!sr->clk_length) + sr_set_clk_length(sr); + + senp_en = sr->senp_mod; + senn_en = sr->senn_mod; + + sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) | + SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN; + + switch (sr->ip_type) { + case SR_TYPE_V1: + sr_config |= SRCONFIG_DELAYCTRL; + senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT; + senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT; + errconfig_offs = ERRCONFIG_V1; + vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1; + vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1; + break; + case SR_TYPE_V2: + senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT; + senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT; + errconfig_offs = ERRCONFIG_V2; + vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2; + vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2; + break; + default: + dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", + __func__); + return -EINVAL; + } + + sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift)); + sr_write_reg(sr, SRCONFIG, sr_config); + sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) | + (sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) | + (sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT); + sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK | + SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK), + sr_errconfig); + + /* Enabling the interrupts if the ERROR module is used */ + sr_modify_reg(sr, errconfig_offs, (vpboundint_en | vpboundint_st), + vpboundint_en); + + return 0; +} + +/** + * sr_disable_errgen() - Disables SmartReflex AVS module's errgen component + * @sr: SR module to be configured. + * + * This API is to be called from the smartreflex class driver to + * disable the error generator module inside the smartreflex module. + * + * Returns 0 on success and error value in case of failure. + */ +int sr_disable_errgen(struct omap_sr *sr) +{ + u32 errconfig_offs; + u32 vpboundint_en, vpboundint_st; + + if (!sr) { + pr_warn("%s: NULL omap_sr from %pS\n", + __func__, (void *)_RET_IP_); + return -EINVAL; + } + + switch (sr->ip_type) { + case SR_TYPE_V1: + errconfig_offs = ERRCONFIG_V1; + vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1; + vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1; + break; + case SR_TYPE_V2: + errconfig_offs = ERRCONFIG_V2; + vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2; + vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2; + break; + default: + dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", + __func__); + return -EINVAL; + } + + /* Disable the Sensor and errorgen */ + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN, 0); + + /* + * Disable the interrupts of ERROR module + * NOTE: modify is a read, modify,write - an implicit OCP barrier + * which is required is present here - sequencing is critical + * at this point (after errgen is disabled, vpboundint disable) + */ + sr_modify_reg(sr, errconfig_offs, vpboundint_en | vpboundint_st, 0); + + return 0; +} + +/** + * sr_configure_minmax() - Configures the SmartReflex to perform AVS using the + * minmaxavg module. + * @sr: SR module to be configured. + * + * This API is to be called from the smartreflex class driver to + * configure the minmaxavg module inside the smartreflex module. + * SR settings if using the ERROR module inside Smartreflex. + * SR CLASS 3 by default uses only the ERROR module where as + * SR CLASS 2 can choose between ERROR module and MINMAXAVG + * module. Returns 0 on success and error value in case of failure. + */ +int sr_configure_minmax(struct omap_sr *sr) +{ + u32 sr_config, sr_avgwt; + u32 senp_en = 0, senn_en = 0; + u8 senp_shift, senn_shift; + + if (!sr) { + pr_warn("%s: NULL omap_sr from %pS\n", + __func__, (void *)_RET_IP_); + return -EINVAL; + } + + if (!sr->clk_length) + sr_set_clk_length(sr); + + senp_en = sr->senp_mod; + senn_en = sr->senn_mod; + + sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) | + SRCONFIG_SENENABLE | + (sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT); + + switch (sr->ip_type) { + case SR_TYPE_V1: + sr_config |= SRCONFIG_DELAYCTRL; + senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT; + senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT; + break; + case SR_TYPE_V2: + senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT; + senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT; + break; + default: + dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", + __func__); + return -EINVAL; + } + + sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift)); + sr_write_reg(sr, SRCONFIG, sr_config); + sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) | + (sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT); + sr_write_reg(sr, AVGWEIGHT, sr_avgwt); + + /* + * Enabling the interrupts if MINMAXAVG module is used. + * TODO: check if all the interrupts are mandatory + */ + switch (sr->ip_type) { + case SR_TYPE_V1: + sr_modify_reg(sr, ERRCONFIG_V1, + (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN | + ERRCONFIG_MCUBOUNDINTEN), + (ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST | + ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST | + ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST)); + break; + case SR_TYPE_V2: + sr_write_reg(sr, IRQSTATUS, + IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT | + IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT); + sr_write_reg(sr, IRQENABLE_SET, + IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT | + IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT); + break; + default: + dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex module without specifying the ip\n", + __func__); + return -EINVAL; + } + + return 0; +} + +/** + * sr_enable() - Enables the smartreflex module. + * @sr: pointer to which the SR module to be configured belongs to. + * @volt: The voltage at which the Voltage domain associated with + * the smartreflex module is operating at. + * This is required only to program the correct Ntarget value. + * + * This API is to be called from the smartreflex class driver to + * enable a smartreflex module. Returns 0 on success. Returns error + * value if the voltage passed is wrong or if ntarget value is wrong. + */ +int sr_enable(struct omap_sr *sr, unsigned long volt) +{ + struct omap_volt_data *volt_data; + struct omap_sr_nvalue_table *nvalue_row; + int ret; + + if (!sr) { + pr_warn("%s: NULL omap_sr from %pS\n", + __func__, (void *)_RET_IP_); + return -EINVAL; + } + + volt_data = omap_voltage_get_voltdata(sr->voltdm, volt); + + if (IS_ERR(volt_data)) { + dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table for nominal voltage %ld\n", + __func__, volt); + return PTR_ERR(volt_data); + } + + nvalue_row = sr_retrieve_nvalue_row(sr, volt_data->sr_efuse_offs); + + if (!nvalue_row) { + dev_warn(&sr->pdev->dev, "%s: failure getting SR data for this voltage %ld\n", + __func__, volt); + return -ENODATA; + } + + /* errminlimit is opp dependent and hence linked to voltage */ + sr->err_minlimit = nvalue_row->errminlimit; + + pm_runtime_get_sync(&sr->pdev->dev); + + /* Check if SR is already enabled. If yes do nothing */ + if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) + return 0; + + /* Configure SR */ + ret = sr_class->configure(sr); + if (ret) + return ret; + + sr_write_reg(sr, NVALUERECIPROCAL, nvalue_row->nvalue); + + /* SRCONFIG - enable SR */ + sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE); + return 0; +} + +/** + * sr_disable() - Disables the smartreflex module. + * @sr: pointer to which the SR module to be configured belongs to. + * + * This API is to be called from the smartreflex class driver to + * disable a smartreflex module. + */ +void sr_disable(struct omap_sr *sr) +{ + if (!sr) { + pr_warn("%s: NULL omap_sr from %pS\n", + __func__, (void *)_RET_IP_); + return; + } + + /* Check if SR clocks are already disabled. If yes do nothing */ + if (pm_runtime_suspended(&sr->pdev->dev)) + return; + + /* + * Disable SR if only it is indeed enabled. Else just + * disable the clocks. + */ + if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) { + switch (sr->ip_type) { + case SR_TYPE_V1: + sr_v1_disable(sr); + break; + case SR_TYPE_V2: + sr_v2_disable(sr); + break; + default: + dev_err(&sr->pdev->dev, "UNKNOWN IP type %d\n", + sr->ip_type); + } + } + + pm_runtime_put_sync_suspend(&sr->pdev->dev); +} + +/** + * sr_register_class() - API to register a smartreflex class parameters. + * @class_data: The structure containing various sr class specific data. + * + * This API is to be called by the smartreflex class driver to register itself + * with the smartreflex driver during init. Returns 0 on success else the + * error value. + */ +int sr_register_class(struct omap_sr_class_data *class_data) +{ + struct omap_sr *sr_info; + + if (!class_data) { + pr_warn("%s:, Smartreflex class data passed is NULL\n", + __func__); + return -EINVAL; + } + + if (sr_class) { + pr_warn("%s: Smartreflex class driver already registered\n", + __func__); + return -EBUSY; + } + + sr_class = class_data; + + /* + * Call into late init to do initializations that require + * both sr driver and sr class driver to be initiallized. + */ + list_for_each_entry(sr_info, &sr_list, node) + sr_late_init(sr_info); + + return 0; +} + +/** + * omap_sr_enable() - API to enable SR clocks and to call into the + * registered smartreflex class enable API. + * @voltdm: VDD pointer to which the SR module to be configured belongs to. + * + * This API is to be called from the kernel in order to enable + * a particular smartreflex module. This API will do the initial + * configurations to turn on the smartreflex module and in turn call + * into the registered smartreflex class enable API. + */ +void omap_sr_enable(struct voltagedomain *voltdm) +{ + struct omap_sr *sr = _sr_lookup(voltdm); + + if (IS_ERR(sr)) { + pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); + return; + } + + if (!sr->autocomp_active) + return; + + if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) { + dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", + __func__); + return; + } + + sr_class->enable(sr); +} + +/** + * omap_sr_disable() - API to disable SR without resetting the voltage + * processor voltage + * @voltdm: VDD pointer to which the SR module to be configured belongs to. + * + * This API is to be called from the kernel in order to disable + * a particular smartreflex module. This API will in turn call + * into the registered smartreflex class disable API. This API will tell + * the smartreflex class disable not to reset the VP voltage after + * disabling smartreflex. + */ +void omap_sr_disable(struct voltagedomain *voltdm) +{ + struct omap_sr *sr = _sr_lookup(voltdm); + + if (IS_ERR(sr)) { + pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); + return; + } + + if (!sr->autocomp_active) + return; + + if (!sr_class || !(sr_class->disable)) { + dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", + __func__); + return; + } + + sr_class->disable(sr, 0); +} + +/** + * omap_sr_disable_reset_volt() - API to disable SR and reset the + * voltage processor voltage + * @voltdm: VDD pointer to which the SR module to be configured belongs to. + * + * This API is to be called from the kernel in order to disable + * a particular smartreflex module. This API will in turn call + * into the registered smartreflex class disable API. This API will tell + * the smartreflex class disable to reset the VP voltage after + * disabling smartreflex. + */ +void omap_sr_disable_reset_volt(struct voltagedomain *voltdm) +{ + struct omap_sr *sr = _sr_lookup(voltdm); + + if (IS_ERR(sr)) { + pr_warn("%s: omap_sr struct for voltdm not found\n", __func__); + return; + } + + if (!sr->autocomp_active) + return; + + if (!sr_class || !(sr_class->disable)) { + dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not registered\n", + __func__); + return; + } + + sr_class->disable(sr, 1); +} + +/* PM Debug FS entries to enable and disable smartreflex. */ +static int omap_sr_autocomp_show(void *data, u64 *val) +{ + struct omap_sr *sr_info = data; + + if (!sr_info) { + pr_warn("%s: omap_sr struct not found\n", __func__); + return -EINVAL; + } + + *val = sr_info->autocomp_active; + + return 0; +} + +static int omap_sr_autocomp_store(void *data, u64 val) +{ + struct omap_sr *sr_info = data; + + if (!sr_info) { + pr_warn("%s: omap_sr struct not found\n", __func__); + return -EINVAL; + } + + /* Sanity check */ + if (val > 1) { + pr_warn("%s: Invalid argument %lld\n", __func__, val); + return -EINVAL; + } + + /* control enable/disable only if there is a delta in value */ + if (sr_info->autocomp_active != val) { + if (!val) + sr_stop_vddautocomp(sr_info); + else + sr_start_vddautocomp(sr_info); + } + + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show, + omap_sr_autocomp_store, "%llu\n"); + +static int omap_sr_probe(struct platform_device *pdev) +{ + struct omap_sr *sr_info; + struct omap_sr_data *pdata = pdev->dev.platform_data; + struct resource *mem, *irq; + struct dentry *nvalue_dir; + int i, ret = 0; + + sr_info = devm_kzalloc(&pdev->dev, sizeof(struct omap_sr), GFP_KERNEL); + if (!sr_info) + return -ENOMEM; + + sr_info->name = devm_kzalloc(&pdev->dev, + SMARTREFLEX_NAME_LEN, GFP_KERNEL); + if (!sr_info->name) + return -ENOMEM; + + platform_set_drvdata(pdev, sr_info); + + if (!pdata) { + dev_err(&pdev->dev, "%s: platform data missing\n", __func__); + return -EINVAL; + } + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + sr_info->base = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(sr_info->base)) { + dev_err(&pdev->dev, "%s: ioremap fail\n", __func__); + return PTR_ERR(sr_info->base); + } + + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + + pm_runtime_enable(&pdev->dev); + pm_runtime_irq_safe(&pdev->dev); + + snprintf(sr_info->name, SMARTREFLEX_NAME_LEN, "%s", pdata->name); + + sr_info->pdev = pdev; + sr_info->srid = pdev->id; + sr_info->voltdm = pdata->voltdm; + sr_info->nvalue_table = pdata->nvalue_table; + sr_info->nvalue_count = pdata->nvalue_count; + sr_info->senn_mod = pdata->senn_mod; + sr_info->senp_mod = pdata->senp_mod; + sr_info->err_weight = pdata->err_weight; + sr_info->err_maxlimit = pdata->err_maxlimit; + sr_info->accum_data = pdata->accum_data; + sr_info->senn_avgweight = pdata->senn_avgweight; + sr_info->senp_avgweight = pdata->senp_avgweight; + sr_info->autocomp_active = false; + sr_info->ip_type = pdata->ip_type; + + if (irq) + sr_info->irq = irq->start; + + sr_set_clk_length(sr_info); + + list_add(&sr_info->node, &sr_list); + + ret = pm_runtime_get_sync(&pdev->dev); + if (ret < 0) { + pm_runtime_put_noidle(&pdev->dev); + goto err_list_del; + } + + /* + * Call into late init to do initializations that require + * both sr driver and sr class driver to be initiallized. + */ + if (sr_class) { + ret = sr_late_init(sr_info); + if (ret) { + pr_warn("%s: Error in SR late init\n", __func__); + goto err_list_del; + } + } + + dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__); + if (!sr_dbg_dir) + sr_dbg_dir = debugfs_create_dir("smartreflex", NULL); + + sr_info->dbg_dir = debugfs_create_dir(sr_info->name, sr_dbg_dir); + + debugfs_create_file("autocomp", S_IRUGO | S_IWUSR, sr_info->dbg_dir, + sr_info, &pm_sr_fops); + debugfs_create_x32("errweight", S_IRUGO, sr_info->dbg_dir, + &sr_info->err_weight); + debugfs_create_x32("errmaxlimit", S_IRUGO, sr_info->dbg_dir, + &sr_info->err_maxlimit); + + nvalue_dir = debugfs_create_dir("nvalue", sr_info->dbg_dir); + + if (sr_info->nvalue_count == 0 || !sr_info->nvalue_table) { + dev_warn(&pdev->dev, "%s: %s: No Voltage table for the corresponding vdd. Cannot create debugfs entries for n-values\n", + __func__, sr_info->name); + + ret = -ENODATA; + goto err_debugfs; + } + + for (i = 0; i < sr_info->nvalue_count; i++) { + char name[NVALUE_NAME_LEN + 1]; + + snprintf(name, sizeof(name), "volt_%lu", + sr_info->nvalue_table[i].volt_nominal); + debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir, + &(sr_info->nvalue_table[i].nvalue)); + snprintf(name, sizeof(name), "errminlimit_%lu", + sr_info->nvalue_table[i].volt_nominal); + debugfs_create_x32(name, S_IRUGO | S_IWUSR, nvalue_dir, + &(sr_info->nvalue_table[i].errminlimit)); + + } + + pm_runtime_put_sync(&pdev->dev); + + return ret; + +err_debugfs: + debugfs_remove_recursive(sr_info->dbg_dir); +err_list_del: + list_del(&sr_info->node); + + pm_runtime_put_sync(&pdev->dev); + + return ret; +} + +static int omap_sr_remove(struct platform_device *pdev) +{ + struct omap_sr_data *pdata = pdev->dev.platform_data; + struct omap_sr *sr_info; + + if (!pdata) { + dev_err(&pdev->dev, "%s: platform data missing\n", __func__); + return -EINVAL; + } + + sr_info = _sr_lookup(pdata->voltdm); + if (IS_ERR(sr_info)) { + dev_warn(&pdev->dev, "%s: omap_sr struct not found\n", + __func__); + return PTR_ERR(sr_info); + } + + if (sr_info->autocomp_active) + sr_stop_vddautocomp(sr_info); + debugfs_remove_recursive(sr_info->dbg_dir); + + pm_runtime_disable(&pdev->dev); + list_del(&sr_info->node); + return 0; +} + +static void omap_sr_shutdown(struct platform_device *pdev) +{ + struct omap_sr_data *pdata = pdev->dev.platform_data; + struct omap_sr *sr_info; + + if (!pdata) { + dev_err(&pdev->dev, "%s: platform data missing\n", __func__); + return; + } + + sr_info = _sr_lookup(pdata->voltdm); + if (IS_ERR(sr_info)) { + dev_warn(&pdev->dev, "%s: omap_sr struct not found\n", + __func__); + return; + } + + if (sr_info->autocomp_active) + sr_stop_vddautocomp(sr_info); + + return; +} + +static const struct of_device_id omap_sr_match[] = { + { .compatible = "ti,omap3-smartreflex-core", }, + { .compatible = "ti,omap3-smartreflex-mpu-iva", }, + { .compatible = "ti,omap4-smartreflex-core", }, + { .compatible = "ti,omap4-smartreflex-mpu", }, + { .compatible = "ti,omap4-smartreflex-iva", }, + { }, +}; +MODULE_DEVICE_TABLE(of, omap_sr_match); + +static struct platform_driver smartreflex_driver = { + .probe = omap_sr_probe, + .remove = omap_sr_remove, + .shutdown = omap_sr_shutdown, + .driver = { + .name = DRIVER_NAME, + .of_match_table = omap_sr_match, + }, +}; + +static int __init sr_init(void) +{ + int ret = 0; + + ret = platform_driver_register(&smartreflex_driver); + if (ret) { + pr_err("%s: platform driver register failed for SR\n", + __func__); + return ret; + } + + return 0; +} +late_initcall(sr_init); + +static void __exit sr_exit(void) +{ + platform_driver_unregister(&smartreflex_driver); +} +module_exit(sr_exit); + +MODULE_DESCRIPTION("OMAP Smartreflex Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRIVER_NAME); +MODULE_AUTHOR("Texas Instruments Inc"); diff --git a/drivers/soc/ti/ti_sci_pm_domains.c b/drivers/soc/ti/ti_sci_pm_domains.c index 8c2a2f23982c..af2126d2b2ff 100644 --- a/drivers/soc/ti/ti_sci_pm_domains.c +++ b/drivers/soc/ti/ti_sci_pm_domains.c @@ -9,7 +9,6 @@ #include <linux/err.h> #include <linux/module.h> -#include <linux/mutex.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_domain.h> @@ -18,150 +17,95 @@ #include <dt-bindings/soc/ti,sci_pm_domain.h> /** - * struct ti_sci_genpd_dev_data: holds data needed for every device attached - * to this genpd - * @idx: index of the device that identifies it with the system - * control processor. - * @exclusive: Permissions for exclusive request or shared request of the - * device. + * struct ti_sci_genpd_provider: holds common TI SCI genpd provider data + * @ti_sci: handle to TI SCI protocol driver that provides ops to + * communicate with system control processor. + * @dev: pointer to dev for the driver for devm allocs + * @pd_list: list of all the power domains on the device + * @data: onecell data for genpd core */ -struct ti_sci_genpd_dev_data { - int idx; - u8 exclusive; +struct ti_sci_genpd_provider { + const struct ti_sci_handle *ti_sci; + struct device *dev; + struct list_head pd_list; + struct genpd_onecell_data data; }; /** * struct ti_sci_pm_domain: TI specific data needed for power domain - * @ti_sci: handle to TI SCI protocol driver that provides ops to - * communicate with system control processor. - * @dev: pointer to dev for the driver for devm allocs + * @idx: index of the device that identifies it with the system + * control processor. + * @exclusive: Permissions for exclusive request or shared request of the + * device. * @pd: generic_pm_domain for use with the genpd framework + * @node: link for the genpd list + * @parent: link to the parent TI SCI genpd provider */ struct ti_sci_pm_domain { - const struct ti_sci_handle *ti_sci; - struct device *dev; + int idx; + u8 exclusive; struct generic_pm_domain pd; + struct list_head node; + struct ti_sci_genpd_provider *parent; }; #define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd) -/** - * ti_sci_dev_id(): get prepopulated ti_sci id from struct dev - * @dev: pointer to device associated with this genpd - * - * Returns device_id stored from ti,sci_id property - */ -static int ti_sci_dev_id(struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - return sci_dev_data->idx; -} - -static u8 is_ti_sci_dev_exclusive(struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - return sci_dev_data->exclusive; -} - -/** - * ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle - * @dev: pointer to device associated with this genpd - * - * Returns ti_sci_handle to be used to communicate with system - * control processor. +/* + * ti_sci_pd_power_off(): genpd power down hook + * @domain: pointer to the powerdomain to power off */ -static const struct ti_sci_handle *ti_sci_dev_to_sci_handle(struct device *dev) +static int ti_sci_pd_power_off(struct generic_pm_domain *domain) { - struct generic_pm_domain *pd = pd_to_genpd(dev->pm_domain); - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(pd); + struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); + const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - return ti_sci_genpd->ti_sci; + return ti_sci->ops.dev_ops.put_device(ti_sci, pd->idx); } -/** - * ti_sci_dev_start(): genpd device start hook called to turn device on - * @dev: pointer to device associated with this genpd to be powered on +/* + * ti_sci_pd_power_on(): genpd power up hook + * @domain: pointer to the powerdomain to power on */ -static int ti_sci_dev_start(struct device *dev) +static int ti_sci_pd_power_on(struct generic_pm_domain *domain) { - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); + struct ti_sci_pm_domain *pd = genpd_to_ti_sci_pd(domain); + const struct ti_sci_handle *ti_sci = pd->parent->ti_sci; - if (is_ti_sci_dev_exclusive(dev)) - return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, idx); + if (pd->exclusive) + return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, + pd->idx); else - return ti_sci->ops.dev_ops.get_device(ti_sci, idx); + return ti_sci->ops.dev_ops.get_device(ti_sci, pd->idx); } -/** - * ti_sci_dev_stop(): genpd device stop hook called to turn device off - * @dev: pointer to device associated with this genpd to be powered off +/* + * ti_sci_pd_xlate(): translation service for TI SCI genpds + * @genpdspec: DT identification data for the genpd + * @data: genpd core data for all the powerdomains on the device */ -static int ti_sci_dev_stop(struct device *dev) +static struct generic_pm_domain *ti_sci_pd_xlate( + struct of_phandle_args *genpdspec, + void *data) { - const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev); - int idx = ti_sci_dev_id(dev); + struct genpd_onecell_data *genpd_data = data; + unsigned int idx = genpdspec->args[0]; - return ti_sci->ops.dev_ops.put_device(ti_sci, idx); -} + if (genpdspec->args_count < 2) + return ERR_PTR(-EINVAL); -static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct device_node *np = dev->of_node; - struct of_phandle_args pd_args; - struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(domain); - const struct ti_sci_handle *ti_sci = ti_sci_genpd->ti_sci; - struct ti_sci_genpd_dev_data *sci_dev_data; - struct generic_pm_domain_data *genpd_data; - int idx, ret = 0; - - ret = of_parse_phandle_with_args(np, "power-domains", - "#power-domain-cells", 0, &pd_args); - if (ret < 0) - return ret; - - if (pd_args.args_count != 1 && pd_args.args_count != 2) - return -EINVAL; - - idx = pd_args.args[0]; - - /* - * Check the validity of the requested idx, if the index is not valid - * the PMMC will return a NAK here and we will not allocate it. - */ - ret = ti_sci->ops.dev_ops.is_valid(ti_sci, idx); - if (ret) - return -EINVAL; - - sci_dev_data = kzalloc(sizeof(*sci_dev_data), GFP_KERNEL); - if (!sci_dev_data) - return -ENOMEM; + if (idx >= genpd_data->num_domains) { + pr_err("%s: invalid domain index %u\n", __func__, idx); + return ERR_PTR(-EINVAL); + } - sci_dev_data->idx = idx; - /* Enable the exclusive permissions by default */ - sci_dev_data->exclusive = TI_SCI_PD_EXCLUSIVE; - if (pd_args.args_count == 2) - sci_dev_data->exclusive = pd_args.args[1] & 0x1; + if (!genpd_data->domains[idx]) + return ERR_PTR(-ENOENT); - genpd_data = dev_gpd_data(dev); - genpd_data->data = sci_dev_data; + genpd_to_ti_sci_pd(genpd_data->domains[idx])->exclusive = + genpdspec->args[1]; - return 0; -} - -static void ti_sci_pd_detach_dev(struct generic_pm_domain *domain, - struct device *dev) -{ - struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev); - struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data; - - kfree(sci_dev_data); - genpd_data->data = NULL; + return genpd_data->domains[idx]; } static const struct of_device_id ti_sci_pm_domain_matches[] = { @@ -173,33 +117,80 @@ MODULE_DEVICE_TABLE(of, ti_sci_pm_domain_matches); static int ti_sci_pm_domain_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct ti_sci_pm_domain *ti_sci_pd; + struct ti_sci_genpd_provider *pd_provider; + struct ti_sci_pm_domain *pd; + struct device_node *np = NULL; + struct of_phandle_args args; int ret; + u32 max_id = 0; + int index; - ti_sci_pd = devm_kzalloc(dev, sizeof(*ti_sci_pd), GFP_KERNEL); - if (!ti_sci_pd) + pd_provider = devm_kzalloc(dev, sizeof(*pd_provider), GFP_KERNEL); + if (!pd_provider) return -ENOMEM; - ti_sci_pd->ti_sci = devm_ti_sci_get_handle(dev); - if (IS_ERR(ti_sci_pd->ti_sci)) - return PTR_ERR(ti_sci_pd->ti_sci); + pd_provider->ti_sci = devm_ti_sci_get_handle(dev); + if (IS_ERR(pd_provider->ti_sci)) + return PTR_ERR(pd_provider->ti_sci); + + pd_provider->dev = dev; + + INIT_LIST_HEAD(&pd_provider->pd_list); + + /* Find highest device ID used for power domains */ + while (1) { + np = of_find_node_with_property(np, "power-domains"); + if (!np) + break; + + index = 0; + + while (1) { + ret = of_parse_phandle_with_args(np, "power-domains", + "#power-domain-cells", + index, &args); + if (ret) + break; + + if (args.args_count >= 1 && args.np == dev->of_node) { + if (args.args[0] > max_id) + max_id = args.args[0]; + + pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + pd->pd.name = devm_kasprintf(dev, GFP_KERNEL, + "pd:%d", + args.args[0]); + if (!pd->pd.name) + return -ENOMEM; - ti_sci_pd->dev = dev; + pd->pd.power_off = ti_sci_pd_power_off; + pd->pd.power_on = ti_sci_pd_power_on; + pd->idx = args.args[0]; + pd->parent = pd_provider; - ti_sci_pd->pd.name = "ti_sci_pd"; + pm_genpd_init(&pd->pd, NULL, true); - ti_sci_pd->pd.attach_dev = ti_sci_pd_attach_dev; - ti_sci_pd->pd.detach_dev = ti_sci_pd_detach_dev; + list_add(&pd->node, &pd_provider->pd_list); + } + index++; + } + } - ti_sci_pd->pd.dev_ops.start = ti_sci_dev_start; - ti_sci_pd->pd.dev_ops.stop = ti_sci_dev_stop; + pd_provider->data.domains = + devm_kcalloc(dev, max_id + 1, + sizeof(*pd_provider->data.domains), + GFP_KERNEL); - pm_genpd_init(&ti_sci_pd->pd, NULL, true); + pd_provider->data.num_domains = max_id + 1; + pd_provider->data.xlate = ti_sci_pd_xlate; - ret = of_genpd_add_provider_simple(np, &ti_sci_pd->pd); + list_for_each_entry(pd, &pd_provider->pd_list, node) + pd_provider->data.domains[pd->idx] = &pd->pd; - return ret; + return of_genpd_add_provider_onecell(dev->of_node, &pd_provider->data); } static struct platform_driver ti_sci_pm_domains_driver = { diff --git a/drivers/soc/versatile/soc-integrator.c b/drivers/soc/versatile/soc-integrator.c index 7dcf77ccd31e..bab4ad87aa75 100644 --- a/drivers/soc/versatile/soc-integrator.c +++ b/drivers/soc/versatile/soc-integrator.c @@ -100,7 +100,7 @@ ATTRIBUTE_GROUPS(integrator); static int __init integrator_soc_init(void) { - static struct regmap *syscon_regmap; + struct regmap *syscon_regmap; struct soc_device *soc_dev; struct soc_device_attribute *soc_dev_attr; struct device_node *np; diff --git a/drivers/soc/xilinx/zynqmp_power.c b/drivers/soc/xilinx/zynqmp_power.c index 31ff49fcd078..c556623dae02 100644 --- a/drivers/soc/xilinx/zynqmp_power.c +++ b/drivers/soc/xilinx/zynqmp_power.c @@ -205,7 +205,7 @@ static int zynqmp_pm_probe(struct platform_device *pdev) rx_chan = mbox_request_channel_byname(client, "rx"); if (IS_ERR(rx_chan)) { dev_err(&pdev->dev, "Failed to request rx channel\n"); - return IS_ERR(rx_chan); + return PTR_ERR(rx_chan); } } else if (of_find_property(pdev->dev.of_node, "interrupts", NULL)) { irq = platform_get_irq(pdev, 0); |