diff options
Diffstat (limited to 'drivers/soc/tegra/fuse/tegra-apbmisc.c')
| -rw-r--r-- | drivers/soc/tegra/fuse/tegra-apbmisc.c | 147 |
1 files changed, 128 insertions, 19 deletions
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c index 590c862538d0..0ce94fdc536f 100644 --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c @@ -1,27 +1,33 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2014-2023, NVIDIA CORPORATION. All rights reserved. */ +#include <linux/acpi.h> #include <linux/export.h> +#include <linux/io.h> #include <linux/kernel.h> +#include <linux/mod_devicetable.h> #include <linux/of.h> #include <linux/of_address.h> -#include <linux/io.h> -#include <soc/tegra/fuse.h> #include <soc/tegra/common.h> +#include <soc/tegra/fuse.h> #include "fuse.h" #define FUSE_SKU_INFO 0x10 +#define ERD_ERR_CONFIG 0x120c +#define ERD_MASK_INBAND_ERR 0x1 + #define PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT 4 #define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_LONG \ (0xf << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT) #define PMC_STRAPPING_OPT_A_RAM_CODE_MASK_SHORT \ (0x3 << PMC_STRAPPING_OPT_A_RAM_CODE_SHIFT) +static void __iomem *apbmisc_base; static bool long_ram_code; static u32 strapping; static u32 chipid; @@ -58,6 +64,8 @@ bool tegra_is_silicon(void) switch (tegra_get_chip_id()) { case TEGRA194: case TEGRA234: + case TEGRA241: + case TEGRA264: if (tegra_get_platform() == 0) return true; @@ -93,11 +101,34 @@ u32 tegra_read_ram_code(void) } EXPORT_SYMBOL_GPL(tegra_read_ram_code); +/* + * The function sets ERD(Error Response Disable) bit. + * This allows to mask inband errors and always send an + * OKAY response from CBB to the master which caused error. + */ +int tegra194_miscreg_mask_serror(void) +{ + if (!apbmisc_base) + return -EPROBE_DEFER; + + if (!of_machine_is_compatible("nvidia,tegra194")) { + WARN(1, "Only supported for Tegra194 devices!\n"); + return -EOPNOTSUPP; + } + + writel_relaxed(ERD_MASK_INBAND_ERR, + apbmisc_base + ERD_ERR_CONFIG); + + return 0; +} +EXPORT_SYMBOL(tegra194_miscreg_mask_serror); + 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", }, + { .compatible = "nvidia,tegra264-misc", }, {}, }; @@ -130,11 +161,37 @@ void __init tegra_init_revision(void) } tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO); + tegra_sku_info.platform = tegra_get_platform(); } +static void tegra_init_apbmisc_resources(struct resource *apbmisc, + struct resource *straps) +{ + void __iomem *strapping_base; + + apbmisc_base = ioremap(apbmisc->start, resource_size(apbmisc)); + if (apbmisc_base) + chipid = readl_relaxed(apbmisc_base + 4); + else + pr_err("failed to map APBMISC registers\n"); + + strapping_base = ioremap(straps->start, resource_size(straps)); + if (strapping_base) { + strapping = readl_relaxed(strapping_base); + iounmap(strapping_base); + } else { + pr_err("failed to map strapping options registers\n"); + } +} + +/** + * tegra_init_apbmisc - Initializes Tegra APBMISC and Strapping registers. + * + * This is called during early init as some of the old 32-bit ARM code needs + * information from the APBMISC registers very early during boot. + */ void __init tegra_init_apbmisc(void) { - void __iomem *apbmisc_base, *strapping_base; struct resource apbmisc, straps; struct device_node *np; @@ -182,30 +239,82 @@ void __init tegra_init_apbmisc(void) */ if (of_address_to_resource(np, 0, &apbmisc) < 0) { pr_err("failed to get APBMISC registers\n"); - return; + goto put; } if (of_address_to_resource(np, 1, &straps) < 0) { pr_err("failed to get strapping options registers\n"); - return; + goto put; } } - apbmisc_base = ioremap(apbmisc.start, resource_size(&apbmisc)); - if (!apbmisc_base) { - pr_err("failed to map APBMISC registers\n"); - } else { - chipid = readl_relaxed(apbmisc_base + 4); - iounmap(apbmisc_base); + tegra_init_apbmisc_resources(&apbmisc, &straps); + long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code"); + +put: + of_node_put(np); +} + +#ifdef CONFIG_ACPI +static const struct acpi_device_id apbmisc_acpi_match[] = { + { "NVDA2010" }, + { /* sentinel */ } +}; + +void tegra_acpi_init_apbmisc(void) +{ + struct resource *resources[2] = { NULL }; + struct resource_entry *rentry; + struct acpi_device *adev = NULL; + struct list_head resource_list; + int rcount = 0; + int ret; + + adev = acpi_dev_get_first_match_dev(apbmisc_acpi_match[0].id, NULL, -1); + if (!adev) + return; + + INIT_LIST_HEAD(&resource_list); + + ret = acpi_dev_get_memory_resources(adev, &resource_list); + if (ret < 0) { + pr_err("failed to get APBMISC memory resources"); + goto out_put_acpi_dev; } - strapping_base = ioremap(straps.start, resource_size(&straps)); - if (!strapping_base) { - pr_err("failed to map strapping options registers\n"); - } else { - strapping = readl_relaxed(strapping_base); - iounmap(strapping_base); + /* + * Get required memory resources. + * + * resources[0]: apbmisc. + * resources[1]: straps. + */ + resource_list_for_each_entry(rentry, &resource_list) { + if (rcount >= ARRAY_SIZE(resources)) + break; + + resources[rcount++] = rentry->res; } - long_ram_code = of_property_read_bool(np, "nvidia,long-ram-code"); + if (!resources[0]) { + pr_err("failed to get APBMISC registers\n"); + goto out_free_resource_list; + } + + if (!resources[1]) { + pr_err("failed to get strapping options registers\n"); + goto out_free_resource_list; + } + + tegra_init_apbmisc_resources(resources[0], resources[1]); + +out_free_resource_list: + acpi_dev_free_resource_list(&resource_list); + +out_put_acpi_dev: + acpi_dev_put(adev); +} +#else +void tegra_acpi_init_apbmisc(void) +{ } +#endif |