19952f691SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2783c8f4cSPeter De Schrijver /* 3821d96e3SKartik * Copyright (c) 2013-2023, NVIDIA CORPORATION. All rights reserved. 4783c8f4cSPeter De Schrijver */ 5783c8f4cSPeter De Schrijver 67e939de1SThierry Reding #include <linux/clk.h> 7783c8f4cSPeter De Schrijver #include <linux/device.h> 8783c8f4cSPeter De Schrijver #include <linux/kobject.h> 91859217bSPaul Gortmaker #include <linux/init.h> 1027a0342aSThierry Reding #include <linux/io.h> 1196ee12b2SThierry Reding #include <linux/nvmem-consumer.h> 1296ee12b2SThierry Reding #include <linux/nvmem-provider.h> 13783c8f4cSPeter De Schrijver #include <linux/of.h> 14783c8f4cSPeter De Schrijver #include <linux/of_address.h> 1527a0342aSThierry Reding #include <linux/platform_device.h> 1624a15252SDmitry Osipenko #include <linux/pm_runtime.h> 17aeecc50aSDmitry Osipenko #include <linux/reset.h> 1827a0342aSThierry Reding #include <linux/slab.h> 1927a0342aSThierry Reding #include <linux/sys_soc.h> 20783c8f4cSPeter De Schrijver 2124fa5af8SThierry Reding #include <soc/tegra/common.h> 22783c8f4cSPeter De Schrijver #include <soc/tegra/fuse.h> 23783c8f4cSPeter De Schrijver 24783c8f4cSPeter De Schrijver #include "fuse.h" 25783c8f4cSPeter De Schrijver 26783c8f4cSPeter De Schrijver struct tegra_sku_info tegra_sku_info; 27f9fc3661SVince Hsu EXPORT_SYMBOL(tegra_sku_info); 28783c8f4cSPeter De Schrijver 29783c8f4cSPeter De Schrijver static const char *tegra_revision_name[TEGRA_REVISION_MAX] = { 30783c8f4cSPeter De Schrijver [TEGRA_REVISION_UNKNOWN] = "unknown", 31783c8f4cSPeter De Schrijver [TEGRA_REVISION_A01] = "A01", 32783c8f4cSPeter De Schrijver [TEGRA_REVISION_A02] = "A02", 33783c8f4cSPeter De Schrijver [TEGRA_REVISION_A03] = "A03", 34783c8f4cSPeter De Schrijver [TEGRA_REVISION_A03p] = "A03 prime", 35783c8f4cSPeter De Schrijver [TEGRA_REVISION_A04] = "A04", 36783c8f4cSPeter De Schrijver }; 37783c8f4cSPeter De Schrijver 38bebf683bSKartik static const char *tegra_platform_name[TEGRA_PLATFORM_MAX] = { 39bebf683bSKartik [TEGRA_PLATFORM_SILICON] = "Silicon", 40bebf683bSKartik [TEGRA_PLATFORM_QT] = "QT", 41bebf683bSKartik [TEGRA_PLATFORM_SYSTEM_FPGA] = "System FPGA", 42bebf683bSKartik [TEGRA_PLATFORM_UNIT_FPGA] = "Unit FPGA", 43bebf683bSKartik [TEGRA_PLATFORM_ASIM_QT] = "Asim QT", 44bebf683bSKartik [TEGRA_PLATFORM_ASIM_LINSIM] = "Asim Linsim", 45bebf683bSKartik [TEGRA_PLATFORM_DSIM_ASIM_LINSIM] = "Dsim Asim Linsim", 46bebf683bSKartik [TEGRA_PLATFORM_VERIFICATION_SIMULATION] = "Verification Simulation", 47bebf683bSKartik [TEGRA_PLATFORM_VDK] = "VDK", 48bebf683bSKartik [TEGRA_PLATFORM_VSP] = "VSP", 49bebf683bSKartik }; 50bebf683bSKartik 51783c8f4cSPeter De Schrijver static const struct of_device_id car_match[] __initconst = { 52783c8f4cSPeter De Schrijver { .compatible = "nvidia,tegra20-car", }, 53783c8f4cSPeter De Schrijver { .compatible = "nvidia,tegra30-car", }, 54783c8f4cSPeter De Schrijver { .compatible = "nvidia,tegra114-car", }, 55783c8f4cSPeter De Schrijver { .compatible = "nvidia,tegra124-car", }, 569b07eb05SThierry Reding { .compatible = "nvidia,tegra132-car", }, 570dc5a0d8SThierry Reding { .compatible = "nvidia,tegra210-car", }, 58783c8f4cSPeter De Schrijver {}, 59783c8f4cSPeter De Schrijver }; 60783c8f4cSPeter De Schrijver 617e939de1SThierry Reding static struct tegra_fuse *fuse = &(struct tegra_fuse) { 627e939de1SThierry Reding .base = NULL, 637e939de1SThierry Reding .soc = NULL, 647e939de1SThierry Reding }; 657e939de1SThierry Reding 667e939de1SThierry Reding static const struct of_device_id tegra_fuse_match[] = { 671f44febfSThierry Reding #ifdef CONFIG_ARCH_TEGRA_234_SOC 681f44febfSThierry Reding { .compatible = "nvidia,tegra234-efuse", .data = &tegra234_fuse_soc }, 691f44febfSThierry Reding #endif 703979a4c6SJC Kuo #ifdef CONFIG_ARCH_TEGRA_194_SOC 713979a4c6SJC Kuo { .compatible = "nvidia,tegra194-efuse", .data = &tegra194_fuse_soc }, 723979a4c6SJC Kuo #endif 7383468fe2STimo Alho #ifdef CONFIG_ARCH_TEGRA_186_SOC 7483468fe2STimo Alho { .compatible = "nvidia,tegra186-efuse", .data = &tegra186_fuse_soc }, 7583468fe2STimo Alho #endif 760dc5a0d8SThierry Reding #ifdef CONFIG_ARCH_TEGRA_210_SOC 770dc5a0d8SThierry Reding { .compatible = "nvidia,tegra210-efuse", .data = &tegra210_fuse_soc }, 780dc5a0d8SThierry Reding #endif 797e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_132_SOC 807e939de1SThierry Reding { .compatible = "nvidia,tegra132-efuse", .data = &tegra124_fuse_soc }, 817e939de1SThierry Reding #endif 827e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_124_SOC 837e939de1SThierry Reding { .compatible = "nvidia,tegra124-efuse", .data = &tegra124_fuse_soc }, 847e939de1SThierry Reding #endif 857e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_114_SOC 867e939de1SThierry Reding { .compatible = "nvidia,tegra114-efuse", .data = &tegra114_fuse_soc }, 877e939de1SThierry Reding #endif 887e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_3x_SOC 897e939de1SThierry Reding { .compatible = "nvidia,tegra30-efuse", .data = &tegra30_fuse_soc }, 907e939de1SThierry Reding #endif 917e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_2x_SOC 927e939de1SThierry Reding { .compatible = "nvidia,tegra20-efuse", .data = &tegra20_fuse_soc }, 937e939de1SThierry Reding #endif 947e939de1SThierry Reding { /* sentinel */ } 957e939de1SThierry Reding }; 967e939de1SThierry Reding 9796ee12b2SThierry Reding static int tegra_fuse_read(void *priv, unsigned int offset, void *value, 9896ee12b2SThierry Reding size_t bytes) 9996ee12b2SThierry Reding { 10096ee12b2SThierry Reding unsigned int count = bytes / 4, i; 10196ee12b2SThierry Reding struct tegra_fuse *fuse = priv; 10296ee12b2SThierry Reding u32 *buffer = value; 10396ee12b2SThierry Reding 10496ee12b2SThierry Reding for (i = 0; i < count; i++) 10596ee12b2SThierry Reding buffer[i] = fuse->read(fuse, offset + i * 4); 10696ee12b2SThierry Reding 10796ee12b2SThierry Reding return 0; 10896ee12b2SThierry Reding } 10996ee12b2SThierry Reding 11088724b78SDmitry Osipenko static void tegra_fuse_restore(void *base) 11188724b78SDmitry Osipenko { 112b631c9c2SThierry Reding fuse->base = (void __iomem *)base; 11388724b78SDmitry Osipenko fuse->clk = NULL; 11488724b78SDmitry Osipenko } 11588724b78SDmitry Osipenko 116*13a69354SKartik static void tegra_fuse_print_sku_info(struct tegra_sku_info *tegra_sku_info) 117*13a69354SKartik { 118*13a69354SKartik pr_info("Tegra Revision: %s SKU: %d CPU Process: %d SoC Process: %d\n", 119*13a69354SKartik tegra_revision_name[tegra_sku_info->revision], 120*13a69354SKartik tegra_sku_info->sku_id, tegra_sku_info->cpu_process_id, 121*13a69354SKartik tegra_sku_info->soc_process_id); 122*13a69354SKartik pr_debug("Tegra CPU Speedo ID %d, SoC Speedo ID %d\n", 123*13a69354SKartik tegra_sku_info->cpu_speedo_id, tegra_sku_info->soc_speedo_id); 124*13a69354SKartik } 125*13a69354SKartik 12671661c1cSKartik static int tegra_fuse_add_lookups(struct tegra_fuse *fuse) 12771661c1cSKartik { 12871661c1cSKartik fuse->lookups = kmemdup_array(fuse->soc->lookups, sizeof(*fuse->lookups), 12971661c1cSKartik fuse->soc->num_lookups, GFP_KERNEL); 13071661c1cSKartik if (!fuse->lookups) 13171661c1cSKartik return -ENOMEM; 13271661c1cSKartik 13371661c1cSKartik nvmem_add_cell_lookups(fuse->lookups, fuse->soc->num_lookups); 13471661c1cSKartik 13571661c1cSKartik return 0; 13671661c1cSKartik } 13771661c1cSKartik 1387e939de1SThierry Reding static int tegra_fuse_probe(struct platform_device *pdev) 1397e939de1SThierry Reding { 1407e939de1SThierry Reding void __iomem *base = fuse->base; 14196ee12b2SThierry Reding struct nvmem_config nvmem; 1427e939de1SThierry Reding struct resource *res; 1437e939de1SThierry Reding int err; 1447e939de1SThierry Reding 145b631c9c2SThierry Reding err = devm_add_action(&pdev->dev, tegra_fuse_restore, (void __force *)base); 14688724b78SDmitry Osipenko if (err) 14788724b78SDmitry Osipenko return err; 14888724b78SDmitry Osipenko 1497e939de1SThierry Reding /* take over the memory region from the early initialization */ 1506674c980SYangtao Li fuse->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); 1516674c980SYangtao Li if (IS_ERR(fuse->base)) 1526674c980SYangtao Li return PTR_ERR(fuse->base); 15355a042b3SDmitry Osipenko fuse->phys = res->start; 1547e939de1SThierry Reding 1557e939de1SThierry Reding fuse->clk = devm_clk_get(&pdev->dev, "fuse"); 1564569e604SKartik if (IS_ERR(fuse->clk)) 1574569e604SKartik return dev_err_probe(&pdev->dev, PTR_ERR(fuse->clk), "failed to get FUSE clock\n"); 1587e939de1SThierry Reding 1597e939de1SThierry Reding platform_set_drvdata(pdev, fuse); 1607e939de1SThierry Reding fuse->dev = &pdev->dev; 1617e939de1SThierry Reding 16288724b78SDmitry Osipenko err = devm_pm_runtime_enable(&pdev->dev); 16388724b78SDmitry Osipenko if (err) 16488724b78SDmitry Osipenko return err; 16524a15252SDmitry Osipenko 1667e939de1SThierry Reding if (fuse->soc->probe) { 1677e939de1SThierry Reding err = fuse->soc->probe(fuse); 1689f1022b8SThierry Reding if (err < 0) 16988724b78SDmitry Osipenko return err; 17051294bf6STimo Alho } 1717e939de1SThierry Reding 17296ee12b2SThierry Reding memset(&nvmem, 0, sizeof(nvmem)); 17396ee12b2SThierry Reding nvmem.dev = &pdev->dev; 17496ee12b2SThierry Reding nvmem.name = "fuse"; 17596ee12b2SThierry Reding nvmem.id = -1; 17696ee12b2SThierry Reding nvmem.owner = THIS_MODULE; 177bea06d77SKartik nvmem.cells = fuse->soc->cells; 178bea06d77SKartik nvmem.ncells = fuse->soc->num_cells; 179cc5b2ad5SKartik nvmem.keepout = fuse->soc->keepouts; 180cc5b2ad5SKartik nvmem.nkeepout = fuse->soc->num_keepouts; 18196ee12b2SThierry Reding nvmem.type = NVMEM_TYPE_OTP; 18296ee12b2SThierry Reding nvmem.read_only = true; 183821d96e3SKartik nvmem.root_only = false; 18496ee12b2SThierry Reding nvmem.reg_read = tegra_fuse_read; 18596ee12b2SThierry Reding nvmem.size = fuse->soc->info->size; 18696ee12b2SThierry Reding nvmem.word_size = 4; 18796ee12b2SThierry Reding nvmem.stride = 4; 18896ee12b2SThierry Reding nvmem.priv = fuse; 18996ee12b2SThierry Reding 19096ee12b2SThierry Reding fuse->nvmem = devm_nvmem_register(&pdev->dev, &nvmem); 19196ee12b2SThierry Reding if (IS_ERR(fuse->nvmem)) { 19296ee12b2SThierry Reding err = PTR_ERR(fuse->nvmem); 19396ee12b2SThierry Reding dev_err(&pdev->dev, "failed to register NVMEM device: %d\n", 19496ee12b2SThierry Reding err); 19588724b78SDmitry Osipenko return err; 1969f1022b8SThierry Reding } 1977e939de1SThierry Reding 198aeecc50aSDmitry Osipenko fuse->rst = devm_reset_control_get_optional(&pdev->dev, "fuse"); 1994569e604SKartik if (IS_ERR(fuse->rst)) 2004569e604SKartik return dev_err_probe(&pdev->dev, PTR_ERR(fuse->rst), "failed to get FUSE reset\n"); 201aeecc50aSDmitry Osipenko 202aeecc50aSDmitry Osipenko /* 203aeecc50aSDmitry Osipenko * FUSE clock is enabled at a boot time, hence this resume/suspend 204aeecc50aSDmitry Osipenko * disables the clock besides the h/w resetting. 205aeecc50aSDmitry Osipenko */ 206aeecc50aSDmitry Osipenko err = pm_runtime_resume_and_get(&pdev->dev); 207aeecc50aSDmitry Osipenko if (err) 20888724b78SDmitry Osipenko return err; 209aeecc50aSDmitry Osipenko 210aeecc50aSDmitry Osipenko err = reset_control_reset(fuse->rst); 211aeecc50aSDmitry Osipenko pm_runtime_put(&pdev->dev); 212aeecc50aSDmitry Osipenko 213aeecc50aSDmitry Osipenko if (err < 0) { 214aeecc50aSDmitry Osipenko dev_err(&pdev->dev, "failed to reset FUSE: %d\n", err); 21588724b78SDmitry Osipenko return err; 2167e939de1SThierry Reding } 2177e939de1SThierry Reding 2187e939de1SThierry Reding /* release the early I/O memory mapping */ 2197e939de1SThierry Reding iounmap(base); 2207e939de1SThierry Reding 2217e939de1SThierry Reding return 0; 2227e939de1SThierry Reding } 2237e939de1SThierry Reding 22424a15252SDmitry Osipenko static int __maybe_unused tegra_fuse_runtime_resume(struct device *dev) 22524a15252SDmitry Osipenko { 22624a15252SDmitry Osipenko int err; 22724a15252SDmitry Osipenko 22824a15252SDmitry Osipenko err = clk_prepare_enable(fuse->clk); 22924a15252SDmitry Osipenko if (err < 0) { 23024a15252SDmitry Osipenko dev_err(dev, "failed to enable FUSE clock: %d\n", err); 23124a15252SDmitry Osipenko return err; 23224a15252SDmitry Osipenko } 23324a15252SDmitry Osipenko 23424a15252SDmitry Osipenko return 0; 23524a15252SDmitry Osipenko } 23624a15252SDmitry Osipenko 23724a15252SDmitry Osipenko static int __maybe_unused tegra_fuse_runtime_suspend(struct device *dev) 23824a15252SDmitry Osipenko { 23924a15252SDmitry Osipenko clk_disable_unprepare(fuse->clk); 24024a15252SDmitry Osipenko 24124a15252SDmitry Osipenko return 0; 24224a15252SDmitry Osipenko } 24324a15252SDmitry Osipenko 24459c6fcebSDmitry Osipenko static int __maybe_unused tegra_fuse_suspend(struct device *dev) 24559c6fcebSDmitry Osipenko { 24659c6fcebSDmitry Osipenko int ret; 24759c6fcebSDmitry Osipenko 24859c6fcebSDmitry Osipenko /* 24959c6fcebSDmitry Osipenko * Critical for RAM re-repair operation, which must occur on resume 25059c6fcebSDmitry Osipenko * from LP1 system suspend and as part of CCPLEX cluster switching. 25159c6fcebSDmitry Osipenko */ 25259c6fcebSDmitry Osipenko if (fuse->soc->clk_suspend_on) 25359c6fcebSDmitry Osipenko ret = pm_runtime_resume_and_get(dev); 25459c6fcebSDmitry Osipenko else 25559c6fcebSDmitry Osipenko ret = pm_runtime_force_suspend(dev); 25659c6fcebSDmitry Osipenko 25759c6fcebSDmitry Osipenko return ret; 25859c6fcebSDmitry Osipenko } 25959c6fcebSDmitry Osipenko 26059c6fcebSDmitry Osipenko static int __maybe_unused tegra_fuse_resume(struct device *dev) 26159c6fcebSDmitry Osipenko { 26259c6fcebSDmitry Osipenko int ret = 0; 26359c6fcebSDmitry Osipenko 26459c6fcebSDmitry Osipenko if (fuse->soc->clk_suspend_on) 26559c6fcebSDmitry Osipenko pm_runtime_put(dev); 26659c6fcebSDmitry Osipenko else 26759c6fcebSDmitry Osipenko ret = pm_runtime_force_resume(dev); 26859c6fcebSDmitry Osipenko 26959c6fcebSDmitry Osipenko return ret; 27059c6fcebSDmitry Osipenko } 27159c6fcebSDmitry Osipenko 27224a15252SDmitry Osipenko static const struct dev_pm_ops tegra_fuse_pm = { 27324a15252SDmitry Osipenko SET_RUNTIME_PM_OPS(tegra_fuse_runtime_suspend, tegra_fuse_runtime_resume, 27424a15252SDmitry Osipenko NULL) 27559c6fcebSDmitry Osipenko SET_SYSTEM_SLEEP_PM_OPS(tegra_fuse_suspend, tegra_fuse_resume) 27624a15252SDmitry Osipenko }; 27724a15252SDmitry Osipenko 2787e939de1SThierry Reding static struct platform_driver tegra_fuse_driver = { 2797e939de1SThierry Reding .driver = { 2807e939de1SThierry Reding .name = "tegra-fuse", 2817e939de1SThierry Reding .of_match_table = tegra_fuse_match, 28224a15252SDmitry Osipenko .pm = &tegra_fuse_pm, 2837e939de1SThierry Reding .suppress_bind_attrs = true, 2847e939de1SThierry Reding }, 2857e939de1SThierry Reding .probe = tegra_fuse_probe, 2867e939de1SThierry Reding }; 2871859217bSPaul Gortmaker builtin_platform_driver(tegra_fuse_driver); 2887e939de1SThierry Reding 289a7083763SNathan Chancellor u32 __init tegra_fuse_read_spare(unsigned int spare) 2907e939de1SThierry Reding { 2917e939de1SThierry Reding unsigned int offset = fuse->soc->info->spare + spare * 4; 2927e939de1SThierry Reding 2937e939de1SThierry Reding return fuse->read_early(fuse, offset) & 1; 2947e939de1SThierry Reding } 2957e939de1SThierry Reding 2967e939de1SThierry Reding u32 __init tegra_fuse_read_early(unsigned int offset) 2977e939de1SThierry Reding { 2987e939de1SThierry Reding return fuse->read_early(fuse, offset); 2997e939de1SThierry Reding } 3007e939de1SThierry Reding 3017e939de1SThierry Reding int tegra_fuse_readl(unsigned long offset, u32 *value) 3027e939de1SThierry Reding { 3030a728e0bSNagarjuna Kristam if (!fuse->read || !fuse->clk) 3047e939de1SThierry Reding return -EPROBE_DEFER; 3057e939de1SThierry Reding 3060a728e0bSNagarjuna Kristam if (IS_ERR(fuse->clk)) 3070a728e0bSNagarjuna Kristam return PTR_ERR(fuse->clk); 3080a728e0bSNagarjuna Kristam 3097e939de1SThierry Reding *value = fuse->read(fuse, offset); 3107e939de1SThierry Reding 3117e939de1SThierry Reding return 0; 3127e939de1SThierry Reding } 3137e939de1SThierry Reding EXPORT_SYMBOL(tegra_fuse_readl); 3147e939de1SThierry Reding 315783c8f4cSPeter De Schrijver static void tegra_enable_fuse_clk(void __iomem *base) 316783c8f4cSPeter De Schrijver { 317783c8f4cSPeter De Schrijver u32 reg; 318783c8f4cSPeter De Schrijver 319783c8f4cSPeter De Schrijver reg = readl_relaxed(base + 0x48); 320783c8f4cSPeter De Schrijver reg |= 1 << 28; 321783c8f4cSPeter De Schrijver writel(reg, base + 0x48); 322783c8f4cSPeter De Schrijver 323783c8f4cSPeter De Schrijver /* 324783c8f4cSPeter De Schrijver * Enable FUSE clock. This needs to be hardcoded because the clock 325783c8f4cSPeter De Schrijver * subsystem is not active during early boot. 326783c8f4cSPeter De Schrijver */ 327783c8f4cSPeter De Schrijver reg = readl(base + 0x14); 328783c8f4cSPeter De Schrijver reg |= 1 << 7; 329783c8f4cSPeter De Schrijver writel(reg, base + 0x14); 330783c8f4cSPeter De Schrijver } 331783c8f4cSPeter De Schrijver 332379ac9ebSJon Hunter static ssize_t major_show(struct device *dev, struct device_attribute *attr, 333379ac9ebSJon Hunter char *buf) 334379ac9ebSJon Hunter { 335379ac9ebSJon Hunter return sprintf(buf, "%d\n", tegra_get_major_rev()); 336379ac9ebSJon Hunter } 337379ac9ebSJon Hunter 338379ac9ebSJon Hunter static DEVICE_ATTR_RO(major); 339379ac9ebSJon Hunter 340379ac9ebSJon Hunter static ssize_t minor_show(struct device *dev, struct device_attribute *attr, 341379ac9ebSJon Hunter char *buf) 342379ac9ebSJon Hunter { 343379ac9ebSJon Hunter return sprintf(buf, "%d\n", tegra_get_minor_rev()); 344379ac9ebSJon Hunter } 345379ac9ebSJon Hunter 346379ac9ebSJon Hunter static DEVICE_ATTR_RO(minor); 347379ac9ebSJon Hunter 348379ac9ebSJon Hunter static struct attribute *tegra_soc_attr[] = { 349379ac9ebSJon Hunter &dev_attr_major.attr, 350379ac9ebSJon Hunter &dev_attr_minor.attr, 351379ac9ebSJon Hunter NULL, 352379ac9ebSJon Hunter }; 353379ac9ebSJon Hunter 354379ac9ebSJon Hunter const struct attribute_group tegra_soc_attr_group = { 355379ac9ebSJon Hunter .attrs = tegra_soc_attr, 356379ac9ebSJon Hunter }; 357379ac9ebSJon Hunter 3581f44febfSThierry Reding #if IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC) || \ 3591f44febfSThierry Reding IS_ENABLED(CONFIG_ARCH_TEGRA_234_SOC) 360379ac9ebSJon Hunter static ssize_t platform_show(struct device *dev, struct device_attribute *attr, 361379ac9ebSJon Hunter char *buf) 362379ac9ebSJon Hunter { 363379ac9ebSJon Hunter /* 364379ac9ebSJon Hunter * Displays the value in the 'pre_si_platform' field of the HIDREV 365379ac9ebSJon Hunter * register for Tegra194 devices. A value of 0 indicates that the 366379ac9ebSJon Hunter * platform type is silicon and all other non-zero values indicate 367379ac9ebSJon Hunter * the type of simulation platform is being used. 368379ac9ebSJon Hunter */ 369775edf78SThierry Reding return sprintf(buf, "%d\n", tegra_get_platform()); 370379ac9ebSJon Hunter } 371379ac9ebSJon Hunter 372379ac9ebSJon Hunter static DEVICE_ATTR_RO(platform); 373379ac9ebSJon Hunter 374379ac9ebSJon Hunter static struct attribute *tegra194_soc_attr[] = { 375379ac9ebSJon Hunter &dev_attr_major.attr, 376379ac9ebSJon Hunter &dev_attr_minor.attr, 377379ac9ebSJon Hunter &dev_attr_platform.attr, 378379ac9ebSJon Hunter NULL, 379379ac9ebSJon Hunter }; 380379ac9ebSJon Hunter 381379ac9ebSJon Hunter const struct attribute_group tegra194_soc_attr_group = { 382379ac9ebSJon Hunter .attrs = tegra194_soc_attr, 383379ac9ebSJon Hunter }; 384379ac9ebSJon Hunter #endif 385379ac9ebSJon Hunter 38627a0342aSThierry Reding struct device * __init tegra_soc_device_register(void) 38727a0342aSThierry Reding { 38827a0342aSThierry Reding struct soc_device_attribute *attr; 38927a0342aSThierry Reding struct soc_device *dev; 39027a0342aSThierry Reding 39127a0342aSThierry Reding attr = kzalloc(sizeof(*attr), GFP_KERNEL); 39227a0342aSThierry Reding if (!attr) 39327a0342aSThierry Reding return NULL; 39427a0342aSThierry Reding 39527a0342aSThierry Reding attr->family = kasprintf(GFP_KERNEL, "Tegra"); 396bebf683bSKartik if (tegra_is_silicon()) 397bebf683bSKartik attr->revision = kasprintf(GFP_KERNEL, "%s %s", 398bebf683bSKartik tegra_platform_name[tegra_sku_info.platform], 39937558ac8SJon Hunter tegra_revision_name[tegra_sku_info.revision]); 400bebf683bSKartik else 401bebf683bSKartik attr->revision = kasprintf(GFP_KERNEL, "%s", 402bebf683bSKartik tegra_platform_name[tegra_sku_info.platform]); 40327a0342aSThierry Reding attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id()); 404379ac9ebSJon Hunter attr->custom_attr_group = fuse->soc->soc_attr_group; 40527a0342aSThierry Reding 40627a0342aSThierry Reding dev = soc_device_register(attr); 40727a0342aSThierry Reding if (IS_ERR(dev)) { 40827a0342aSThierry Reding kfree(attr->soc_id); 40927a0342aSThierry Reding kfree(attr->revision); 41027a0342aSThierry Reding kfree(attr->family); 41127a0342aSThierry Reding kfree(attr); 41227a0342aSThierry Reding return ERR_CAST(dev); 41327a0342aSThierry Reding } 41427a0342aSThierry Reding 41527a0342aSThierry Reding return soc_device_to_device(dev); 41627a0342aSThierry Reding } 41727a0342aSThierry Reding 41824fa5af8SThierry Reding static int __init tegra_init_fuse(void) 419783c8f4cSPeter De Schrijver { 4207e939de1SThierry Reding const struct of_device_id *match; 421783c8f4cSPeter De Schrijver struct device_node *np; 4227e939de1SThierry Reding struct resource regs; 42371661c1cSKartik int err; 42424fa5af8SThierry Reding 425783c8f4cSPeter De Schrijver tegra_init_apbmisc(); 426783c8f4cSPeter De Schrijver 4277e939de1SThierry Reding np = of_find_matching_node_and_match(NULL, tegra_fuse_match, &match); 4287e939de1SThierry Reding if (!np) { 4297e939de1SThierry Reding /* 4307e939de1SThierry Reding * Fall back to legacy initialization for 32-bit ARM only. All 4317e939de1SThierry Reding * 64-bit ARM device tree files for Tegra are required to have 4327e939de1SThierry Reding * a FUSE node. 4337e939de1SThierry Reding * 4347e939de1SThierry Reding * This is for backwards-compatibility with old device trees 4357e939de1SThierry Reding * that didn't contain a FUSE node. 4367e939de1SThierry Reding */ 4377e939de1SThierry Reding if (IS_ENABLED(CONFIG_ARM) && soc_is_tegra()) { 4387e939de1SThierry Reding u8 chip = tegra_get_chip_id(); 4397e939de1SThierry Reding 4407e939de1SThierry Reding regs.start = 0x7000f800; 4417e939de1SThierry Reding regs.end = 0x7000fbff; 4427e939de1SThierry Reding regs.flags = IORESOURCE_MEM; 4437e939de1SThierry Reding 4447e939de1SThierry Reding switch (chip) { 4457e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_2x_SOC 4467e939de1SThierry Reding case TEGRA20: 4477e939de1SThierry Reding fuse->soc = &tegra20_fuse_soc; 4487e939de1SThierry Reding break; 4497e939de1SThierry Reding #endif 4507e939de1SThierry Reding 4517e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_3x_SOC 4527e939de1SThierry Reding case TEGRA30: 4537e939de1SThierry Reding fuse->soc = &tegra30_fuse_soc; 4547e939de1SThierry Reding break; 4557e939de1SThierry Reding #endif 4567e939de1SThierry Reding 4577e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_114_SOC 4587e939de1SThierry Reding case TEGRA114: 4597e939de1SThierry Reding fuse->soc = &tegra114_fuse_soc; 4607e939de1SThierry Reding break; 4617e939de1SThierry Reding #endif 4627e939de1SThierry Reding 4637e939de1SThierry Reding #ifdef CONFIG_ARCH_TEGRA_124_SOC 4647e939de1SThierry Reding case TEGRA124: 4657e939de1SThierry Reding fuse->soc = &tegra124_fuse_soc; 4667e939de1SThierry Reding break; 4677e939de1SThierry Reding #endif 4687e939de1SThierry Reding 4697e939de1SThierry Reding default: 4707e939de1SThierry Reding pr_warn("Unsupported SoC: %02x\n", chip); 4717e939de1SThierry Reding break; 4727e939de1SThierry Reding } 473783c8f4cSPeter De Schrijver } else { 4747e939de1SThierry Reding /* 4757e939de1SThierry Reding * At this point we're not running on Tegra, so play 4767e939de1SThierry Reding * nice with multi-platform kernels. 4777e939de1SThierry Reding */ 4787e939de1SThierry Reding return 0; 4797e939de1SThierry Reding } 4807e939de1SThierry Reding } else { 4817e939de1SThierry Reding /* 4827e939de1SThierry Reding * Extract information from the device tree if we've found a 4837e939de1SThierry Reding * matching node. 4847e939de1SThierry Reding */ 4857e939de1SThierry Reding if (of_address_to_resource(np, 0, ®s) < 0) { 4867e939de1SThierry Reding pr_err("failed to get FUSE register\n"); 48724fa5af8SThierry Reding return -ENXIO; 488783c8f4cSPeter De Schrijver } 489783c8f4cSPeter De Schrijver 4907e939de1SThierry Reding fuse->soc = match->data; 4917e939de1SThierry Reding } 4927e939de1SThierry Reding 4937e939de1SThierry Reding np = of_find_matching_node(NULL, car_match); 4947e939de1SThierry Reding if (np) { 4957e939de1SThierry Reding void __iomem *base = of_iomap(np, 0); 496e941712cSLiang He of_node_put(np); 4977e939de1SThierry Reding if (base) { 4987e939de1SThierry Reding tegra_enable_fuse_clk(base); 4997e939de1SThierry Reding iounmap(base); 5007e939de1SThierry Reding } else { 5017e939de1SThierry Reding pr_err("failed to map clock registers\n"); 5027e939de1SThierry Reding return -ENXIO; 5037e939de1SThierry Reding } 5047e939de1SThierry Reding } 5057e939de1SThierry Reding 5064bdc0d67SChristoph Hellwig fuse->base = ioremap(regs.start, resource_size(®s)); 5077e939de1SThierry Reding if (!fuse->base) { 5087e939de1SThierry Reding pr_err("failed to map FUSE registers\n"); 5097e939de1SThierry Reding return -ENXIO; 5107e939de1SThierry Reding } 5117e939de1SThierry Reding 5127e939de1SThierry Reding fuse->soc->init(fuse); 513783c8f4cSPeter De Schrijver 514*13a69354SKartik tegra_fuse_print_sku_info(&tegra_sku_info); 51524fa5af8SThierry Reding 51671661c1cSKartik err = tegra_fuse_add_lookups(fuse); 51771661c1cSKartik if (err) 51871661c1cSKartik pr_err("failed to add FUSE lookups\n"); 5199f94faddSThierry Reding 52071661c1cSKartik return err; 521783c8f4cSPeter De Schrijver } 52224fa5af8SThierry Reding early_initcall(tegra_init_fuse); 52327a0342aSThierry Reding 52427a0342aSThierry Reding #ifdef CONFIG_ARM64 52527a0342aSThierry Reding static int __init tegra_init_soc(void) 52627a0342aSThierry Reding { 527226cff48SThierry Reding struct device_node *np; 52827a0342aSThierry Reding struct device *soc; 52927a0342aSThierry Reding 530226cff48SThierry Reding /* make sure we're running on Tegra */ 531226cff48SThierry Reding np = of_find_matching_node(NULL, tegra_fuse_match); 532226cff48SThierry Reding if (!np) 533226cff48SThierry Reding return 0; 534226cff48SThierry Reding 535226cff48SThierry Reding of_node_put(np); 536226cff48SThierry Reding 53727a0342aSThierry Reding soc = tegra_soc_device_register(); 53827a0342aSThierry Reding if (IS_ERR(soc)) { 53927a0342aSThierry Reding pr_err("failed to register SoC device: %ld\n", PTR_ERR(soc)); 54027a0342aSThierry Reding return PTR_ERR(soc); 54127a0342aSThierry Reding } 54227a0342aSThierry Reding 54327a0342aSThierry Reding return 0; 54427a0342aSThierry Reding } 5459261b43eSThierry Reding device_initcall(tegra_init_soc); 54627a0342aSThierry Reding #endif 547