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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 DE118C433ED for ; Wed, 19 May 2021 12:07:32 +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 8488361363 for ; Wed, 19 May 2021 12:07:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8488361363 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linkmauve.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FlWpC22FPz3f68 for ; Wed, 19 May 2021 22:07:31 +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)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FlSmX4QF1z2yhf for ; Wed, 19 May 2021 19:50:52 +1000 (AEST) Received: by luna.linkmauve.fr (Postfix, from userid 1000) id 92EE8F40629; Wed, 19 May 2021 11:50:47 +0200 (CEST) From: Emmanuel Gil Peyrot To: Srinivas Kandagatla , linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org Subject: [PATCH v2 1/4] nvmem: nintendo-otp: Add new driver for the Wii and Wii U OTP Date: Wed, 19 May 2021 11:50:41 +0200 Message-Id: <20210519095044.4109-2-linkmauve@linkmauve.fr> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210519095044.4109-1-linkmauve@linkmauve.fr> References: <20210519095044.4109-1-linkmauve@linkmauve.fr> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Wed, 19 May 2021 22:03:54 +1000 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, Rob Herring , Paul Mackerras , Ash Logan , =?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. Signed-off-by: Emmanuel Gil Peyrot --- 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 + */ + +#include +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("Nintendo Wii and Wii U OTP driver"); +MODULE_LICENSE("GPL v2"); -- 2.31.1