diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc-exynos.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-exynos.c | 249 |
1 files changed, 203 insertions, 46 deletions
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c index 35026795be28..384609671a9a 100644 --- a/drivers/mmc/host/dw_mmc-exynos.c +++ b/drivers/mmc/host/dw_mmc-exynos.c @@ -1,12 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Exynos Specific Extensions for Synopsys DW Multimedia Card Interface driver * * Copyright (C) 2012, Samsung Electronics Co., Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/module.h> @@ -15,7 +11,6 @@ #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/pm_runtime.h> #include <linux/slab.h> @@ -32,6 +27,9 @@ enum dw_mci_exynos_type { DW_MCI_TYPE_EXYNOS5420_SMU, DW_MCI_TYPE_EXYNOS7, DW_MCI_TYPE_EXYNOS7_SMU, + DW_MCI_TYPE_EXYNOS7870, + DW_MCI_TYPE_EXYNOS7870_SMU, + DW_MCI_TYPE_ARTPEC8, }; /* Exynos implementation specific driver private data */ @@ -73,6 +71,15 @@ static struct dw_mci_exynos_compatible { }, { .compatible = "samsung,exynos7-dw-mshc-smu", .ctrl_type = DW_MCI_TYPE_EXYNOS7_SMU, + }, { + .compatible = "samsung,exynos7870-dw-mshc", + .ctrl_type = DW_MCI_TYPE_EXYNOS7870, + }, { + .compatible = "samsung,exynos7870-dw-mshc-smu", + .ctrl_type = DW_MCI_TYPE_EXYNOS7870_SMU, + }, { + .compatible = "axis,artpec8-dw-mshc", + .ctrl_type = DW_MCI_TYPE_ARTPEC8, }, }; @@ -85,7 +92,10 @@ static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host) else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210) return EXYNOS4210_FIXED_CIU_CLK_DIV; else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL64)) + 1; else return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1; @@ -100,7 +110,8 @@ static void dw_mci_exynos_config_smu(struct dw_mci *host) * set for non-ecryption mode at this time. */ if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420_SMU || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) { + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU) { mci_writel(host, MPSBEGIN0, 0); mci_writel(host, MPSEND0, SDMMC_ENDING_SEC_NR_MAX); mci_writel(host, MPSCTRL0, SDMMC_MPSCTRL_SECURE_WRITE_BIT | @@ -126,6 +137,17 @@ static int dw_mci_exynos_priv_init(struct dw_mci *host) DQS_CTRL_GET_RD_DELAY(priv->saved_strobe_ctrl); } + if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU) { + /* Quirk needed for certain Exynos SoCs */ + host->quirks |= DW_MMC_QUIRK_FIFO64_32; + } + + if (priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) { + /* Quirk needed for the ARTPEC-8 SoC */ + host->quirks |= DW_MMC_QUIRK_EXTENDED_TMOUT; + } + host->bus_hz /= (priv->ciu_div + 1); return 0; @@ -137,7 +159,10 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing) u32 clksel; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) clksel = mci_readl(host, CLKSEL64); else clksel = mci_readl(host, CLKSEL); @@ -145,7 +170,10 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing) clksel = (clksel & ~SDMMC_CLKSEL_TIMING_MASK) | timing; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) mci_writel(host, CLKSEL64, clksel); else mci_writel(host, CLKSEL, clksel); @@ -161,17 +189,36 @@ static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing) set_bit(DW_MMC_CARD_NO_USE_HOLD, &host->slot->flags); } -#ifdef CONFIG_PM static int dw_mci_exynos_runtime_resume(struct device *dev) { struct dw_mci *host = dev_get_drvdata(dev); + int ret; + + ret = dw_mci_runtime_resume(dev); + if (ret) + return ret; dw_mci_exynos_config_smu(host); - return dw_mci_runtime_resume(dev); + + return ret; +} + +/** + * dw_mci_exynos_suspend_noirq - Exynos-specific suspend code + * @dev: Device to suspend (this device) + * + * This ensures that device will be in runtime active state in + * dw_mci_exynos_resume_noirq after calling pm_runtime_force_resume() + */ +static int dw_mci_exynos_suspend_noirq(struct device *dev) +{ + pm_runtime_get_noresume(dev); + return pm_runtime_force_suspend(dev); } /** * dw_mci_exynos_resume_noirq - Exynos-specific resume code + * @dev: Device to resume (this device) * * On exynos5420 there is a silicon errata that will sometimes leave the * WAKEUP_INT bit in the CLKSEL register asserted. This bit is 1 to indicate @@ -180,32 +227,41 @@ static int dw_mci_exynos_runtime_resume(struct device *dev) * * We run this code on all exynos variants because it doesn't hurt. */ - static int dw_mci_exynos_resume_noirq(struct device *dev) { struct dw_mci *host = dev_get_drvdata(dev); struct dw_mci_exynos_priv_data *priv = host->priv; u32 clksel; + int ret; + + ret = pm_runtime_force_resume(dev); + if (ret) + return ret; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) clksel = mci_readl(host, CLKSEL64); else clksel = mci_readl(host, CLKSEL); if (clksel & SDMMC_CLKSEL_WAKEUP_INT) { if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) mci_writel(host, CLKSEL64, clksel); else mci_writel(host, CLKSEL, clksel); } + pm_runtime_put(dev); + return 0; } -#else -#define dw_mci_exynos_resume_noirq NULL -#endif /* CONFIG_PM */ static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing) { @@ -216,7 +272,8 @@ static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing) * Not supported to configure register * related to HS400 */ - if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) { + if ((priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) || + (priv->ctrl_type == DW_MCI_TYPE_ARTPEC8)) { if (timing == MMC_TIMING_MMC_HS400) dev_warn(host->dev, "cannot configure HS400, unsupported chipset\n"); @@ -229,6 +286,8 @@ static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing) if (timing == MMC_TIMING_MMC_HS400) { dqs |= DATA_STROBE_EN; strobe = DQS_CTRL_RD_DELAY(strobe, priv->dqs_delay); + } else if (timing == MMC_TIMING_UHS_SDR104) { + dqs &= 0xffffff00; } else { dqs &= ~DATA_STROBE_EN; } @@ -288,6 +347,15 @@ static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios) if (ios->bus_width == MMC_BUS_WIDTH_8) wanted <<= 1; break; + case MMC_TIMING_UHS_SDR104: + case MMC_TIMING_UHS_SDR50: + clksel = (priv->sdr_timing & 0xfff8ffff) | + (priv->ciu_div << 16); + break; + case MMC_TIMING_UHS_DDR50: + clksel = (priv->ddr_timing & 0xfff8ffff) | + (priv->ciu_div << 16); + break; default: clksel = priv->sdr_timing; } @@ -361,7 +429,10 @@ static inline u8 dw_mci_exynos_get_clksmpl(struct dw_mci *host) struct dw_mci_exynos_priv_data *priv = host->priv; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL64)); else return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL)); @@ -373,13 +444,19 @@ static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample) struct dw_mci_exynos_priv_data *priv = host->priv; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) clksel = mci_readl(host, CLKSEL64); else clksel = mci_readl(host, CLKSEL); clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample); if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) mci_writel(host, CLKSEL64, clksel); else mci_writel(host, CLKSEL, clksel); @@ -392,7 +469,10 @@ static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host) u8 sample; if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) clksel = mci_readl(host, CLKSEL64); else clksel = mci_readl(host, CLKSEL); @@ -401,7 +481,10 @@ static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host) clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample); if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 || - priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870 || + priv->ctrl_type == DW_MCI_TYPE_EXYNOS7870_SMU || + priv->ctrl_type == DW_MCI_TYPE_ARTPEC8) mci_writel(host, CLKSEL64, clksel); else mci_writel(host, CLKSEL, clksel); @@ -409,14 +492,14 @@ static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host) return sample; } -static s8 dw_mci_exynos_get_best_clksmpl(u8 candiates) +static s8 dw_mci_exynos_get_best_clksmpl(u8 candidates) { const u8 iter = 8; u8 __c; s8 i, loc = -1; for (i = 0; i < iter; i++) { - __c = ror8(candiates, i); + __c = ror8(candidates, i); if ((__c & 0xc7) == 0xc7) { loc = i; goto out; @@ -424,13 +507,25 @@ static s8 dw_mci_exynos_get_best_clksmpl(u8 candiates) } for (i = 0; i < iter; i++) { - __c = ror8(candiates, i); + __c = ror8(candidates, i); if ((__c & 0x83) == 0x83) { loc = i; goto out; } } + /* + * If there is no cadiates value, then it needs to return -EIO. + * If there are candidates values and don't find bset clk sample value, + * then use a first candidates clock sample value. + */ + for (i = 0; i < iter; i++) { + __c = ror8(candidates, i); + if ((__c & 0x1) == 0x1) { + loc = i; + goto out; + } + } out: return loc; } @@ -440,8 +535,8 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode) struct dw_mci *host = slot->host; struct dw_mci_exynos_priv_data *priv = host->priv; struct mmc_host *mmc = slot->mmc; - u8 start_smpl, smpl, candiates = 0; - s8 found = -1; + u8 start_smpl, smpl, candidates = 0; + s8 found; int ret = 0; start_smpl = dw_mci_exynos_get_clksmpl(host); @@ -451,16 +546,18 @@ static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode) smpl = dw_mci_exynos_move_next_clksmpl(host); if (!mmc_send_tuning(mmc, opcode, NULL)) - candiates |= (1 << smpl); + candidates |= (1 << smpl); } while (start_smpl != smpl); - found = dw_mci_exynos_get_best_clksmpl(candiates); + found = dw_mci_exynos_get_best_clksmpl(candidates); if (found >= 0) { dw_mci_exynos_set_clksmpl(host, found); priv->tuned_sample = found; } else { ret = -EIO; + dev_warn(&mmc->class_dev, + "There is no candidates value about clksmpl!\n"); } return ret; @@ -477,16 +574,65 @@ static int dw_mci_exynos_prepare_hs400_tuning(struct dw_mci *host, return 0; } +static void dw_mci_exynos_set_data_timeout(struct dw_mci *host, + unsigned int timeout_ns) +{ + u32 clk_div, tmout; + u64 tmp; + unsigned int tmp2; + + clk_div = (mci_readl(host, CLKDIV) & 0xFF) * 2; + if (clk_div == 0) + clk_div = 1; + + tmp = DIV_ROUND_UP_ULL((u64)timeout_ns * host->bus_hz, NSEC_PER_SEC); + tmp = DIV_ROUND_UP_ULL(tmp, clk_div); + + /* TMOUT[7:0] (RESPONSE_TIMEOUT) */ + tmout = 0xFF; /* Set maximum */ + + /* + * Extended HW timer (max = 0x6FFFFF2): + * ((TMOUT[10:8] - 1) * 0xFFFFFF + TMOUT[31:11] * 8) + */ + if (!tmp || tmp > 0x6FFFFF2) + tmout |= (0xFFFFFF << 8); + else { + /* TMOUT[10:8] */ + tmp2 = (((unsigned int)tmp / 0xFFFFFF) + 1) & 0x7; + tmout |= tmp2 << 8; + + /* TMOUT[31:11] */ + tmp = tmp - ((tmp2 - 1) * 0xFFFFFF); + tmout |= (tmp & 0xFFFFF8) << 8; + } + + mci_writel(host, TMOUT, tmout); + dev_dbg(host->dev, "timeout_ns: %u => TMOUT[31:8]: %#08x", + timeout_ns, tmout >> 8); +} + +static u32 dw_mci_exynos_get_drto_clks(struct dw_mci *host) +{ + u32 drto_clks; + + drto_clks = mci_readl(host, TMOUT) >> 8; + + return (((drto_clks & 0x7) - 1) * 0xFFFFFF) + ((drto_clks & 0xFFFFF8)); +} + /* Common capabilities of Exynos4/Exynos5 SoC */ static unsigned long exynos_dwmmc_caps[4] = { - MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23, - MMC_CAP_CMD23, - MMC_CAP_CMD23, - MMC_CAP_CMD23, + MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA, + 0, + 0, + 0, }; static const struct dw_mci_drv_data exynos_drv_data = { .caps = exynos_dwmmc_caps, + .num_caps = ARRAY_SIZE(exynos_dwmmc_caps), + .common_caps = MMC_CAP_CMD23, .init = dw_mci_exynos_priv_init, .set_ios = dw_mci_exynos_set_ios, .parse_dt = dw_mci_exynos_parse_dt, @@ -494,6 +640,16 @@ static const struct dw_mci_drv_data exynos_drv_data = { .prepare_hs400_tuning = dw_mci_exynos_prepare_hs400_tuning, }; +static const struct dw_mci_drv_data artpec_drv_data = { + .common_caps = MMC_CAP_CMD23, + .init = dw_mci_exynos_priv_init, + .set_ios = dw_mci_exynos_set_ios, + .parse_dt = dw_mci_exynos_parse_dt, + .execute_tuning = dw_mci_exynos_execute_tuning, + .set_data_timeout = dw_mci_exynos_set_data_timeout, + .get_drto_clks = dw_mci_exynos_get_drto_clks, +}; + static const struct of_device_id dw_mci_exynos_match[] = { { .compatible = "samsung,exynos4412-dw-mshc", .data = &exynos_drv_data, }, @@ -507,6 +663,12 @@ static const struct of_device_id dw_mci_exynos_match[] = { .data = &exynos_drv_data, }, { .compatible = "samsung,exynos7-dw-mshc-smu", .data = &exynos_drv_data, }, + { .compatible = "samsung,exynos7870-dw-mshc", + .data = &exynos_drv_data, }, + { .compatible = "samsung,exynos7870-dw-mshc-smu", + .data = &exynos_drv_data, }, + { .compatible = "axis,artpec8-dw-mshc", + .data = &artpec_drv_data, }, {}, }; MODULE_DEVICE_TABLE(of, dw_mci_exynos_match); @@ -536,24 +698,18 @@ static int dw_mci_exynos_probe(struct platform_device *pdev) return 0; } -static int dw_mci_exynos_remove(struct platform_device *pdev) +static void dw_mci_exynos_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); pm_runtime_put_noidle(&pdev->dev); - return dw_mci_pltfm_remove(pdev); + dw_mci_pltfm_remove(pdev); } static const struct dev_pm_ops dw_mci_exynos_pmops = { - SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, - pm_runtime_force_resume) - SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend, - dw_mci_exynos_runtime_resume, - NULL) - .resume_noirq = dw_mci_exynos_resume_noirq, - .thaw_noirq = dw_mci_exynos_resume_noirq, - .restore_noirq = dw_mci_exynos_resume_noirq, + NOIRQ_SYSTEM_SLEEP_PM_OPS(dw_mci_exynos_suspend_noirq, dw_mci_exynos_resume_noirq) + RUNTIME_PM_OPS(dw_mci_runtime_suspend, dw_mci_exynos_runtime_resume, NULL) }; static struct platform_driver dw_mci_exynos_pltfm_driver = { @@ -561,8 +717,9 @@ static struct platform_driver dw_mci_exynos_pltfm_driver = { .remove = dw_mci_exynos_remove, .driver = { .name = "dwmmc_exynos", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = dw_mci_exynos_match, - .pm = &dw_mci_exynos_pmops, + .pm = pm_ptr(&dw_mci_exynos_pmops), }, }; |
