diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/805-v5.15-0004-nvmem-nintendo-otp-Add-new-driver-for-the-Wii-and-Wi.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/805-v5.15-0004-nvmem-nintendo-otp-Add-new-driver-for-the-Wii-and-Wi.patch | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/805-v5.15-0004-nvmem-nintendo-otp-Add-new-driver-for-the-Wii-and-Wi.patch b/target/linux/generic/backport-5.10/805-v5.15-0004-nvmem-nintendo-otp-Add-new-driver-for-the-Wii-and-Wi.patch new file mode 100644 index 0000000000..62d9e2aa0f --- /dev/null +++ b/target/linux/generic/backport-5.10/805-v5.15-0004-nvmem-nintendo-otp-Add-new-driver-for-the-Wii-and-Wi.patch @@ -0,0 +1,191 @@ +From 3683b761fe3a10ad18515acd5368dd601268cfe5 Mon Sep 17 00:00:00 2001 +From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> +Date: Tue, 10 Aug 2021 16:30:36 +0100 +Subject: [PATCH] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This OTP is read-only and contains various keys used by the console to +decrypt, encrypt or verify various pieces of storage. + +Its size depends on the console, it is 128 bytes on the Wii and +1024 bytes on the Wii U (split into eight 128 bytes banks). + +It can be used directly by writing into one register and reading from +the other one, without any additional synchronisation. + +This driver was written based on reversed documentation, see: +https://wiiubrew.org/wiki/Hardware/OTP + +Tested-by: Jonathan Neuschäfer <j.ne@posteo.net> # on Wii +Tested-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> # on Wii U +Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Link: https://lore.kernel.org/r/20210810153036.1494-3-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/Kconfig | 11 ++++ + drivers/nvmem/Makefile | 2 + + drivers/nvmem/nintendo-otp.c | 124 +++++++++++++++++++++++++++++++++++ + 3 files changed, 137 insertions(+) + create mode 100644 drivers/nvmem/nintendo-otp.c + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -107,6 +107,17 @@ config MTK_EFUSE + This driver can also be built as a module. If so, the module + will be called efuse-mtk. + ++config NVMEM_NINTENDO_OTP ++ tristate "Nintendo Wii and Wii U OTP Support" ++ help ++ This is a driver exposing the OTP of a Nintendo Wii or Wii U console. ++ ++ This memory contains common and per-console keys, signatures and ++ related data required to access peripherals. ++ ++ This driver can also be built as a module. If so, the module ++ will be called nvmem-nintendo-otp. ++ + config QCOM_QFPROM + tristate "QCOM QFPROM Support" + depends on ARCH_QCOM || COMPILE_TEST +--- a/drivers/nvmem/Makefile ++++ b/drivers/nvmem/Makefile +@@ -23,6 +23,8 @@ obj-$(CONFIG_NVMEM_LPC18XX_OTP) += nvmem + nvmem_lpc18xx_otp-y := lpc18xx_otp.o + obj-$(CONFIG_NVMEM_MXS_OCOTP) += nvmem-mxs-ocotp.o + nvmem-mxs-ocotp-y := mxs-ocotp.o ++obj-$(CONFIG_NVMEM_NINTENDO_OTP) += nvmem-nintendo-otp.o ++nvmem-nintendo-otp-y := nintendo-otp.o + obj-$(CONFIG_MTK_EFUSE) += nvmem_mtk-efuse.o + nvmem_mtk-efuse-y := mtk-efuse.o + obj-$(CONFIG_QCOM_QFPROM) += nvmem_qfprom.o +--- /dev/null ++++ b/drivers/nvmem/nintendo-otp.c +@@ -0,0 +1,124 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Nintendo Wii and Wii U OTP driver ++ * ++ * This is a driver exposing the OTP of a Nintendo Wii or Wii U console. ++ * ++ * This memory contains common and per-console keys, signatures and ++ * related data required to access peripherals. ++ * ++ * Based on reversed documentation from https://wiiubrew.org/wiki/Hardware/OTP ++ * ++ * Copyright (C) 2021 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> ++ */ ++ ++#include <linux/device.h> ++#include <linux/io.h> ++#include <linux/module.h> ++#include <linux/mod_devicetable.h> ++#include <linux/nvmem-provider.h> ++#include <linux/of_device.h> ++#include <linux/platform_device.h> ++ ++#define HW_OTPCMD 0 ++#define HW_OTPDATA 4 ++#define OTP_READ 0x80000000 ++#define BANK_SIZE 128 ++#define WORD_SIZE 4 ++ ++struct nintendo_otp_priv { ++ void __iomem *regs; ++}; ++ ++struct nintendo_otp_devtype_data { ++ const char *name; ++ unsigned int num_banks; ++}; ++ ++static const struct nintendo_otp_devtype_data hollywood_otp_data = { ++ .name = "wii-otp", ++ .num_banks = 1, ++}; ++ ++static const struct nintendo_otp_devtype_data latte_otp_data = { ++ .name = "wiiu-otp", ++ .num_banks = 8, ++}; ++ ++static int nintendo_otp_reg_read(void *context, ++ unsigned int reg, void *_val, size_t bytes) ++{ ++ struct nintendo_otp_priv *priv = context; ++ u32 *val = _val; ++ int words = bytes / WORD_SIZE; ++ u32 bank, addr; ++ ++ while (words--) { ++ bank = (reg / BANK_SIZE) << 8; ++ addr = (reg / WORD_SIZE) % (BANK_SIZE / WORD_SIZE); ++ iowrite32be(OTP_READ | bank | addr, priv->regs + HW_OTPCMD); ++ *val++ = ioread32be(priv->regs + HW_OTPDATA); ++ reg += WORD_SIZE; ++ } ++ ++ return 0; ++} ++ ++static const struct of_device_id nintendo_otp_of_table[] = { ++ { .compatible = "nintendo,hollywood-otp", .data = &hollywood_otp_data }, ++ { .compatible = "nintendo,latte-otp", .data = &latte_otp_data }, ++ {/* sentinel */}, ++}; ++MODULE_DEVICE_TABLE(of, nintendo_otp_of_table); ++ ++static int nintendo_otp_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ const struct of_device_id *of_id = ++ of_match_device(nintendo_otp_of_table, dev); ++ struct resource *res; ++ struct nvmem_device *nvmem; ++ struct nintendo_otp_priv *priv; ++ ++ struct nvmem_config config = { ++ .stride = WORD_SIZE, ++ .word_size = WORD_SIZE, ++ .reg_read = nintendo_otp_reg_read, ++ .read_only = true, ++ .root_only = true, ++ }; ++ ++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ priv->regs = devm_ioremap_resource(dev, res); ++ if (IS_ERR(priv->regs)) ++ return PTR_ERR(priv->regs); ++ ++ if (of_id->data) { ++ const struct nintendo_otp_devtype_data *data = of_id->data; ++ config.name = data->name; ++ config.size = data->num_banks * BANK_SIZE; ++ } ++ ++ config.dev = dev; ++ config.priv = priv; ++ ++ nvmem = devm_nvmem_register(dev, &config); ++ ++ return PTR_ERR_OR_ZERO(nvmem); ++} ++ ++static struct platform_driver nintendo_otp_driver = { ++ .probe = nintendo_otp_probe, ++ .driver = { ++ .name = "nintendo-otp", ++ .of_match_table = nintendo_otp_of_table, ++ }, ++}; ++module_platform_driver(nintendo_otp_driver); ++MODULE_AUTHOR("Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>"); ++MODULE_DESCRIPTION("Nintendo Wii and Wii U OTP driver"); ++MODULE_LICENSE("GPL v2"); |