From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FA56C4338F for ; Sun, 1 Aug 2021 07:39:51 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 097C26018A for ; Sun, 1 Aug 2021 07:39:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 097C26018A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linkmauve.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4GctM95G0Yz3dGh for ; Sun, 1 Aug 2021 17:39:49 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linkmauve.fr (client-ip=2a01:e0a:828:c7c0:49:5ff:fe41:d261; helo=luna.linkmauve.fr; envelope-from=linkmauve@linkmauve.fr; receiver=) Received: from luna.linkmauve.fr (unknown [IPv6:2a01:e0a:828:c7c0:49:5ff:fe41:d261]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4GctKl70yRz2ymH for ; Sun, 1 Aug 2021 17:38:33 +1000 (AEST) Received: by luna.linkmauve.fr (Postfix, from userid 1000) id 4ED11F409C5; Sun, 1 Aug 2021 09:38:27 +0200 (CEST) From: Emmanuel Gil Peyrot To: Rob Herring , linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org Subject: [PATCH v4 1/5] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Date: Sun, 1 Aug 2021 09:38:18 +0200 Message-Id: <20210801073822.12452-2-linkmauve@linkmauve.fr> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210801073822.12452-1-linkmauve@linkmauve.fr> References: <20210701225743.14631-1-linkmauve@linkmauve.fr> <20210801073822.12452-1-linkmauve@linkmauve.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Emmanuel Gil Peyrot , linux-kernel@vger.kernel.org, Srinivas Kandagatla , Ash Logan , Paul Mackerras , =?UTF-8?q?Jonathan=20Neusch=C3=A4fer?= Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 Signed-off-by: Emmanuel Gil Peyrot Tested-by: Jonathan Neuschäfer # on Wii Tested-by: Emmanuel Gil Peyrot # on Wii U --- 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 diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig index dd2019006838..39854d43758b 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 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 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..33961b17f9f1 --- /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 + */ + +#include +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("Nintendo Wii and Wii U OTP driver"); +MODULE_LICENSE("GPL v2"); -- 2.32.0