diff options
Diffstat (limited to 'drivers/soc/tegra/fuse/fuse-tegra30.c')
| -rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra30.c | 213 |
1 files changed, 66 insertions, 147 deletions
diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c index 4d2f71bf65c5..23f8a4b5ca42 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra30.c +++ b/drivers/soc/tegra/fuse/fuse-tegra30.c @@ -42,113 +42,32 @@ #define FUSE_HAS_REVISION_INFO BIT(0) -enum speedo_idx { - SPEEDO_TEGRA30 = 0, - SPEEDO_TEGRA114, - SPEEDO_TEGRA124, -}; - -struct tegra_fuse_info { - int size; - int spare_bit; - enum speedo_idx speedo_idx; -}; - -static void __iomem *fuse_base; -static struct clk *fuse_clk; -static const struct tegra_fuse_info *fuse_info; - -u32 tegra30_fuse_readl(const unsigned int offset) +#if defined(CONFIG_ARCH_TEGRA_3x_SOC) || \ + defined(CONFIG_ARCH_TEGRA_114_SOC) || \ + defined(CONFIG_ARCH_TEGRA_124_SOC) || \ + defined(CONFIG_ARCH_TEGRA_132_SOC) +static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset) { - u32 val; - - /* - * early in the boot, the fuse clock will be enabled by - * tegra_init_fuse() - */ - - if (fuse_clk) - clk_prepare_enable(fuse_clk); - - val = readl_relaxed(fuse_base + FUSE_BEGIN + offset); - - if (fuse_clk) - clk_disable_unprepare(fuse_clk); - - return val; + return readl_relaxed(fuse->base + FUSE_BEGIN + offset); } -static const struct tegra_fuse_info tegra30_info = { - .size = 0x2a4, - .spare_bit = 0x144, - .speedo_idx = SPEEDO_TEGRA30, -}; - -static const struct tegra_fuse_info tegra114_info = { - .size = 0x2a0, - .speedo_idx = SPEEDO_TEGRA114, -}; - -static const struct tegra_fuse_info tegra124_info = { - .size = 0x300, - .speedo_idx = SPEEDO_TEGRA124, -}; - -static const struct of_device_id tegra30_fuse_of_match[] = { - { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_info }, - { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_info }, - { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_info }, - {}, -}; - -static int tegra30_fuse_probe(struct platform_device *pdev) +static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset) { - const struct of_device_id *of_dev_id; + u32 value; + int err; - of_dev_id = of_match_device(tegra30_fuse_of_match, &pdev->dev); - if (!of_dev_id) - return -ENODEV; - - fuse_clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(fuse_clk)) { - dev_err(&pdev->dev, "missing clock"); - return PTR_ERR(fuse_clk); + err = clk_prepare_enable(fuse->clk); + if (err < 0) { + dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err); + return 0; } - platform_set_drvdata(pdev, NULL); - - if (tegra_fuse_create_sysfs(&pdev->dev, fuse_info->size, - tegra30_fuse_readl)) - return -ENODEV; - - dev_dbg(&pdev->dev, "loaded\n"); + value = readl_relaxed(fuse->base + FUSE_BEGIN + offset); - return 0; -} - -static struct platform_driver tegra30_fuse_driver = { - .probe = tegra30_fuse_probe, - .driver = { - .name = "tegra_fuse", - .of_match_table = tegra30_fuse_of_match, - } -}; + clk_disable_unprepare(fuse->clk); -static int __init tegra30_fuse_init(void) -{ - return platform_driver_register(&tegra30_fuse_driver); + return value; } -postcore_initcall(tegra30_fuse_init); - -/* Early boot code. This code is called before the devices are created */ - -typedef void (*speedo_f)(struct tegra_sku_info *sku_info); - -static speedo_f __initdata speedo_tbl[] = { - [SPEEDO_TEGRA30] = tegra30_init_speedo_data, - [SPEEDO_TEGRA114] = tegra114_init_speedo_data, - [SPEEDO_TEGRA124] = tegra124_init_speedo_data, -}; static void __init tegra30_fuse_add_randomness(void) { @@ -161,64 +80,64 @@ static void __init tegra30_fuse_add_randomness(void) randomness[3] |= tegra_sku_info.core_process_id; randomness[4] = tegra_sku_info.cpu_speedo_id << 16; randomness[4] |= tegra_sku_info.soc_speedo_id; - randomness[5] = tegra30_fuse_readl(FUSE_VENDOR_CODE); - randomness[6] = tegra30_fuse_readl(FUSE_FAB_CODE); - randomness[7] = tegra30_fuse_readl(FUSE_LOT_CODE_0); - randomness[8] = tegra30_fuse_readl(FUSE_LOT_CODE_1); - randomness[9] = tegra30_fuse_readl(FUSE_WAFER_ID); - randomness[10] = tegra30_fuse_readl(FUSE_X_COORDINATE); - randomness[11] = tegra30_fuse_readl(FUSE_Y_COORDINATE); + randomness[5] = tegra_fuse_read_early(FUSE_VENDOR_CODE); + randomness[6] = tegra_fuse_read_early(FUSE_FAB_CODE); + randomness[7] = tegra_fuse_read_early(FUSE_LOT_CODE_0); + randomness[8] = tegra_fuse_read_early(FUSE_LOT_CODE_1); + randomness[9] = tegra_fuse_read_early(FUSE_WAFER_ID); + randomness[10] = tegra_fuse_read_early(FUSE_X_COORDINATE); + randomness[11] = tegra_fuse_read_early(FUSE_Y_COORDINATE); add_device_randomness(randomness, sizeof(randomness)); } -static void __init legacy_fuse_init(void) +static void __init tegra30_fuse_init(struct tegra_fuse *fuse) { - switch (tegra_get_chip_id()) { - case TEGRA30: - fuse_info = &tegra30_info; - break; - case TEGRA114: - fuse_info = &tegra114_info; - break; - case TEGRA124: - case TEGRA132: - fuse_info = &tegra124_info; - break; - default: - return; - } + fuse->read_early = tegra30_fuse_read_early; + fuse->read = tegra30_fuse_read; - fuse_base = ioremap(TEGRA_FUSE_BASE, TEGRA_FUSE_SIZE); + tegra_init_revision(); + fuse->soc->speedo_init(&tegra_sku_info); + tegra30_fuse_add_randomness(); } +#endif -bool __init tegra30_spare_fuse(int spare_bit) -{ - u32 offset = fuse_info->spare_bit + spare_bit * 4; +#ifdef CONFIG_ARCH_TEGRA_3x_SOC +static const struct tegra_fuse_info tegra30_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x2a4, + .spare = 0x144, +}; - return tegra30_fuse_readl(offset) & 1; -} +const struct tegra_fuse_soc tegra30_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra30_init_speedo_data, + .info = &tegra30_fuse_info, +}; +#endif -void __init tegra30_init_fuse_early(void) -{ - struct device_node *np; - const struct of_device_id *of_match; - - np = of_find_matching_node_and_match(NULL, tegra30_fuse_of_match, - &of_match); - if (np) { - fuse_base = of_iomap(np, 0); - fuse_info = (struct tegra_fuse_info *)of_match->data; - } else - legacy_fuse_init(); - - if (!fuse_base) { - pr_warn("fuse DT node missing and unknown chip id: 0x%02x\n", - tegra_get_chip_id()); - return; - } +#ifdef CONFIG_ARCH_TEGRA_114_SOC +static const struct tegra_fuse_info tegra114_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x2a0, +}; - tegra_init_revision(); - speedo_tbl[fuse_info->speedo_idx](&tegra_sku_info); - tegra30_fuse_add_randomness(); -} +const struct tegra_fuse_soc tegra114_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra114_init_speedo_data, + .info = &tegra114_fuse_info, +}; +#endif + +#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) +static const struct tegra_fuse_info tegra124_fuse_info = { + .read = tegra30_fuse_read, + .size = 0x300, +}; + +const struct tegra_fuse_soc tegra124_fuse_soc = { + .init = tegra30_fuse_init, + .speedo_init = tegra124_init_speedo_data, + .info = &tegra124_fuse_info, +}; +#endif |