* [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP [not found] <20210519090525.1788-1-linkmauve@linkmauve.fr> @ 2021-05-19 9:05 ` Emmanuel Gil Peyrot 2021-05-19 9:05 ` [PATCH 2/4] dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support Emmanuel Gil Peyrot ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: Emmanuel Gil Peyrot @ 2021-05-19 9:05 UTC (permalink / raw) To: Srinivas Kandagatla, linuxppc-dev, devicetree Cc: Emmanuel Gil Peyrot, Ash Logan, Jonathan Neuschäfer, Rob Herring, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel 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. Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> --- drivers/nvmem/Kconfig | 11 ++++ drivers/nvmem/Makefile | 2 + drivers/nvmem/nintendo-otp.c | 115 +++++++++++++++++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 drivers/nvmem/nintendo-otp.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index dd2019006838..dd6196e49b2d 100644 --- 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 to expose the OTP on a Nintendo Wii or Wii U. + + 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 diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index bbea1410240a..dcbbde35b6a8 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -23,6 +23,8 @@ obj-$(CONFIG_NVMEM_LPC18XX_OTP) += nvmem_lpc18xx_otp.o nvmem_lpc18xx_otp-y := lpc18xx_otp.o obj-$(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 diff --git a/drivers/nvmem/nintendo-otp.c b/drivers/nvmem/nintendo-otp.c new file mode 100644 index 000000000000..de6f5d7c10ef --- /dev/null +++ b/drivers/nvmem/nintendo-otp.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Nintendo Wii and Wii U OTP driver + * + * 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 + +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 >> 2; + u32 bank, addr; + + while (words--) { + bank = (reg << 1) & ~0xff; + addr = (reg >> 2) & 0x1f; + iowrite32be(OTP_READ | bank | addr, priv->regs + HW_OTPCMD); + *val++ = ioread32be(priv->regs + HW_OTPDATA); + reg += 4; + } + + 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 = 4, + .word_size = 4, + .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 * 128; + } + + 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"); -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/4] dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support [not found] <20210519090525.1788-1-linkmauve@linkmauve.fr> 2021-05-19 9:05 ` [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Emmanuel Gil Peyrot @ 2021-05-19 9:05 ` Emmanuel Gil Peyrot 2021-05-19 9:05 ` [PATCH 3/4] powerpc: wii.dts: Expose the OTP on this platform Emmanuel Gil Peyrot 2021-05-19 9:05 ` [PATCH 4/4] powerpc: wii_defconfig: Enable OTP by default Emmanuel Gil Peyrot 3 siblings, 0 replies; 5+ messages in thread From: Emmanuel Gil Peyrot @ 2021-05-19 9:05 UTC (permalink / raw) To: Srinivas Kandagatla, linuxppc-dev, devicetree Cc: Emmanuel Gil Peyrot, Ash Logan, Jonathan Neuschäfer, Rob Herring, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel Both of these consoles use the exact same two registers, even at the same address, but the Wii U has eight banks of 128 bytes memory while the Wii only has one, hence the two compatible strings. Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> --- .../devicetree/bindings/nvmem/nintendo-otp.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/nintendo-otp.txt diff --git a/Documentation/devicetree/bindings/nvmem/nintendo-otp.txt b/Documentation/devicetree/bindings/nvmem/nintendo-otp.txt new file mode 100644 index 000000000000..b26d705ec52d --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nintendo-otp.txt @@ -0,0 +1,14 @@ +Nintendo Wii and Wii U OTP + +Required Properties: +- compatible: depending on the console this should be one of: + - "nintendo,hollywood-otp" for the Wii + - "nintendo,latte-otp" for the Wii U +- reg: base address and size of the OTP registers + + +Example: + otp@d8001ec { + compatible = "nintendo,latte-otp"; + reg = <0x0d8001ec 0x8>; + }; -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 3/4] powerpc: wii.dts: Expose the OTP on this platform [not found] <20210519090525.1788-1-linkmauve@linkmauve.fr> 2021-05-19 9:05 ` [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Emmanuel Gil Peyrot 2021-05-19 9:05 ` [PATCH 2/4] dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support Emmanuel Gil Peyrot @ 2021-05-19 9:05 ` Emmanuel Gil Peyrot 2021-05-19 9:05 ` [PATCH 4/4] powerpc: wii_defconfig: Enable OTP by default Emmanuel Gil Peyrot 3 siblings, 0 replies; 5+ messages in thread From: Emmanuel Gil Peyrot @ 2021-05-19 9:05 UTC (permalink / raw) To: Srinivas Kandagatla, linuxppc-dev, devicetree Cc: Emmanuel Gil Peyrot, Ash Logan, Jonathan Neuschäfer, Rob Herring, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel This can be used by the newly-added nintendo-otp nvmem module. Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> --- arch/powerpc/boot/dts/wii.dts | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/boot/dts/wii.dts b/arch/powerpc/boot/dts/wii.dts index aaa381da1906..7837c4a3f09c 100644 --- a/arch/powerpc/boot/dts/wii.dts +++ b/arch/powerpc/boot/dts/wii.dts @@ -219,6 +219,11 @@ control@d800100 { reg = <0x0d800100 0x300>; }; + otp@d8001ec { + compatible = "nintendo,hollywood-otp"; + reg = <0x0d8001ec 0x8>; + }; + disk@d806000 { compatible = "nintendo,hollywood-di"; reg = <0x0d806000 0x40>; -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 4/4] powerpc: wii_defconfig: Enable OTP by default [not found] <20210519090525.1788-1-linkmauve@linkmauve.fr> ` (2 preceding siblings ...) 2021-05-19 9:05 ` [PATCH 3/4] powerpc: wii.dts: Expose the OTP on this platform Emmanuel Gil Peyrot @ 2021-05-19 9:05 ` Emmanuel Gil Peyrot 3 siblings, 0 replies; 5+ messages in thread From: Emmanuel Gil Peyrot @ 2021-05-19 9:05 UTC (permalink / raw) To: Srinivas Kandagatla, linuxppc-dev, devicetree Cc: Emmanuel Gil Peyrot, Ash Logan, Jonathan Neuschäfer, Rob Herring, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel This selects the nintendo-otp module when building for this platform, if CONFIG_NVMEM is also selected. Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> --- arch/powerpc/configs/wii_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/configs/wii_defconfig b/arch/powerpc/configs/wii_defconfig index 379c171f3ddd..a0c45bf2bfb1 100644 --- a/arch/powerpc/configs/wii_defconfig +++ b/arch/powerpc/configs/wii_defconfig @@ -99,6 +99,7 @@ CONFIG_LEDS_TRIGGER_HEARTBEAT=y CONFIG_LEDS_TRIGGER_PANIC=y CONFIG_RTC_CLASS=y CONFIG_RTC_DRV_GENERIC=y +CONFIG_NVMEM_NINTENDO_OTP=y CONFIG_EXT2_FS=y CONFIG_EXT4_FS=y CONFIG_FUSE_FS=m -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
[parent not found: <20210519094546.3954-1-linkmauve@linkmauve.fr>]
* [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP [not found] <20210519094546.3954-1-linkmauve@linkmauve.fr> @ 2021-05-19 9:45 ` Emmanuel Gil Peyrot 0 siblings, 0 replies; 5+ messages in thread From: Emmanuel Gil Peyrot @ 2021-05-19 9:45 UTC (permalink / raw) To: Srinivas Kandagatla, linuxppc-dev, devicetree Cc: Emmanuel Gil Peyrot, Ash Logan, Jonathan Neuschäfer, Rob Herring, Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel 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. Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> --- drivers/nvmem/Kconfig | 11 ++++ drivers/nvmem/Makefile | 2 + drivers/nvmem/nintendo-otp.c | 115 +++++++++++++++++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 drivers/nvmem/nintendo-otp.c diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index dd2019006838..dd6196e49b2d 100644 --- 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 to expose the OTP on a Nintendo Wii or Wii U. + + 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 diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile index bbea1410240a..dcbbde35b6a8 100644 --- a/drivers/nvmem/Makefile +++ b/drivers/nvmem/Makefile @@ -23,6 +23,8 @@ obj-$(CONFIG_NVMEM_LPC18XX_OTP) += nvmem_lpc18xx_otp.o 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 diff --git a/drivers/nvmem/nintendo-otp.c b/drivers/nvmem/nintendo-otp.c new file mode 100644 index 000000000000..de6f5d7c10ef --- /dev/null +++ b/drivers/nvmem/nintendo-otp.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Nintendo Wii and Wii U OTP driver + * + * 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 + +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 >> 2; + u32 bank, addr; + + while (words--) { + bank = (reg << 1) & ~0xff; + addr = (reg >> 2) & 0x1f; + iowrite32be(OTP_READ | bank | addr, priv->regs + HW_OTPCMD); + *val++ = ioread32be(priv->regs + HW_OTPDATA); + reg += 4; + } + + 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 = 4, + .word_size = 4, + .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 * 128; + } + + 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"); -- 2.31.1 ^ permalink raw reply related [flat|nested] 5+ messages in thread
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[not found] <20210519090525.1788-1-linkmauve@linkmauve.fr>
2021-05-19 9:05 ` [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Emmanuel Gil Peyrot
2021-05-19 9:05 ` [PATCH 2/4] dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support Emmanuel Gil Peyrot
2021-05-19 9:05 ` [PATCH 3/4] powerpc: wii.dts: Expose the OTP on this platform Emmanuel Gil Peyrot
2021-05-19 9:05 ` [PATCH 4/4] powerpc: wii_defconfig: Enable OTP by default Emmanuel Gil Peyrot
[not found] <20210519094546.3954-1-linkmauve@linkmauve.fr>
2021-05-19 9:45 ` [PATCH 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Emmanuel Gil Peyrot
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