From patchwork Mon Jul 17 10:32:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhupesh Sharma X-Patchwork-Id: 704920 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDB8AC04A94 for ; Mon, 17 Jul 2023 10:33:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230477AbjGQKdc (ORCPT ); Mon, 17 Jul 2023 06:33:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230333AbjGQKdb (ORCPT ); Mon, 17 Jul 2023 06:33:31 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B75019AD for ; Mon, 17 Jul 2023 03:33:09 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1b8bd586086so34864385ad.2 for ; Mon, 17 Jul 2023 03:33:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1689589983; x=1692181983; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ATTO38/iOwVxNwj2oDkWC8K05sDZoQ4wq1YyEPI7+d8=; b=MyOhzNAQ9J1iPOmPtoVjZ4DgBGmtH/yypeJvaYJuXuHKJWwG3hmX1TR6Htx4j6Tde8 J1wj0/3c7wtqzGEFhVGk8UeNk43zxTSKQDASwRZeVLrigBUrmKKgGy6/C0YS3j+IiELZ jESzbOjERN6CT+e7sri3mg0D//U4ofZZRc2eh1rU2+aObRLTSOlpTrndBN04QgHsOA5r m3je/+qdgFfY2qVbwGPUCpvkbtoBEWVIbAtHmrzTZ+cOqAPCQWcR/PzqBkMndlVHYhOD p8ZOep23FpvRle3w/tnzVxtSDiZiTrTs98vx54qWjhLcQE84EpAnnld2qQiCefx5ha+j fU1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689589983; x=1692181983; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ATTO38/iOwVxNwj2oDkWC8K05sDZoQ4wq1YyEPI7+d8=; b=Q/zwsoDAvtEXvGUFVkt48l+cfH7PhRZHqFKw6PYb5LR8wBv5GLssU/7q77UCbzsl/J UAW7AMp/ZvZixdlA+riDt0ZypMN2Lu3hXN8WvAqo6SpuH8kTRqSO2FBBUxMzrLIb5WVC lokIHW4cqndVO9IcS+DKWFkg2AA/g72stdCLRwEKU5Gz52nkLNp8i34irFC6GOLOVhd7 rzhRuHVtdlS5ozdcGTlf0cz0Rzas/s+bIZ86RbwBUgApGO1wrUm+HcpRRq+o91AggaK/ cGNWWkpLncJy1Nie1FqvXiSqulrWhkn1qEPtlqb4Th6RfHZbpRXu0RxqhddPkcM/+gRU Z9EQ== X-Gm-Message-State: ABy/qLYNz78ONusr/v+TbcadCs7Eea5Q5ni+eM+8RHzG0eaiLhrJlulX cjat+sLk6T599PVVTxz4InB5XQ== X-Google-Smtp-Source: APBJJlFeyZDPDWURFC6I/5UxqTtOXcwxmB92C9PgveQcu/vBRWYlKgTJnm6kdl0bBnm/qdhLmlHGEA== X-Received: by 2002:a17:902:efc3:b0:1b8:b461:595e with SMTP id ja3-20020a170902efc300b001b8b461595emr12182599plb.48.1689589982808; Mon, 17 Jul 2023 03:33:02 -0700 (PDT) Received: from localhost.localdomain ([223.233.68.54]) by smtp.gmail.com with ESMTPSA id ij9-20020a170902ab4900b001b9de67285dsm12633616plb.156.2023.07.17.03.32.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Jul 2023 03:33:02 -0700 (PDT) From: Bhupesh Sharma To: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org Cc: agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, linux-kernel@vger.kernel.org, bhupesh.linux@gmail.com, bhupesh.sharma@linaro.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, krzysztof.kozlowski@linaro.org, quic_schowdhu@quicinc.com, gregkh@linuxfoundation.org Subject: [PATCH v8 2/4] usb: misc: eud: Add driver support for SM6115 / SM4250 Date: Mon, 17 Jul 2023 16:02:34 +0530 Message-Id: <20230717103236.1246771-3-bhupesh.sharma@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230717103236.1246771-1-bhupesh.sharma@linaro.org> References: <20230717103236.1246771-1-bhupesh.sharma@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add SM6115 / SM4250 SoC EUD support in qcom_eud driver. On some SoCs (like the SM6115 / SM4250 SoC), the mode manager needs to be accessed only via the secure world (through 'scm' calls). Also, the enable bit inside 'tcsr_check_reg' needs to be set first to set the eud in 'enable' mode on these SoCs. Signed-off-by: Bhupesh Sharma --- drivers/usb/misc/Kconfig | 2 +- drivers/usb/misc/qcom_eud.c | 62 ++++++++++++++++++++++++++++++++++--- 2 files changed, 58 insertions(+), 6 deletions(-) diff --git a/drivers/usb/misc/Kconfig b/drivers/usb/misc/Kconfig index 99b15b77dfd57..51eb5140caa14 100644 --- a/drivers/usb/misc/Kconfig +++ b/drivers/usb/misc/Kconfig @@ -146,7 +146,7 @@ config USB_APPLEDISPLAY config USB_QCOM_EUD tristate "QCOM Embedded USB Debugger(EUD) Driver" - depends on ARCH_QCOM || COMPILE_TEST + depends on (ARCH_QCOM && QCOM_SCM) || COMPILE_TEST select USB_ROLE_SWITCH help This module enables support for Qualcomm Technologies, Inc. diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c index 7f371ea1248c3..136cac90228a0 100644 --- a/drivers/usb/misc/qcom_eud.c +++ b/drivers/usb/misc/qcom_eud.c @@ -11,9 +11,11 @@ #include #include #include +#include #include #include #include +#include #include #define EUD_REG_INT1_EN_MASK 0x0024 @@ -30,15 +32,25 @@ #define EUD_INT_SAFE_MODE BIT(4) #define EUD_INT_ALL (EUD_INT_VBUS | EUD_INT_SAFE_MODE) +#define EUD_EN2_EN BIT(0) +#define EUD_EN2_DISABLE (0) +#define TCSR_CHECK_EN BIT(0) + +struct eud_soc_cfg { + u32 tcsr_check_offset; +}; + struct eud_chip { struct device *dev; struct usb_role_switch *role_sw; + const struct eud_soc_cfg *eud_cfg; void __iomem *base; void __iomem *mode_mgr; unsigned int int_status; int irq; bool enabled; bool usb_attached; + phys_addr_t secure_mode_mgr; }; static int enable_eud(struct eud_chip *priv) @@ -46,7 +58,11 @@ static int enable_eud(struct eud_chip *priv) writel(EUD_ENABLE, priv->base + EUD_REG_CSR_EUD_EN); writel(EUD_INT_VBUS | EUD_INT_SAFE_MODE, priv->base + EUD_REG_INT1_EN_MASK); - writel(1, priv->mode_mgr + EUD_REG_EUD_EN2); + + if (priv->secure_mode_mgr) + qcom_scm_io_writel(priv->secure_mode_mgr + EUD_REG_EUD_EN2, EUD_EN2_EN); + else + writel(EUD_EN2_EN, priv->mode_mgr + EUD_REG_EUD_EN2); return usb_role_switch_set_role(priv->role_sw, USB_ROLE_DEVICE); } @@ -54,7 +70,11 @@ static int enable_eud(struct eud_chip *priv) static void disable_eud(struct eud_chip *priv) { writel(0, priv->base + EUD_REG_CSR_EUD_EN); - writel(0, priv->mode_mgr + EUD_REG_EUD_EN2); + + if (priv->secure_mode_mgr) + qcom_scm_io_writel(priv->secure_mode_mgr + EUD_REG_EUD_EN2, EUD_EN2_DISABLE); + else + writel(EUD_EN2_DISABLE, priv->mode_mgr + EUD_REG_EUD_EN2); } static ssize_t enable_show(struct device *dev, @@ -178,6 +198,8 @@ static void eud_role_switch_release(void *data) static int eud_probe(struct platform_device *pdev) { struct eud_chip *chip; + struct resource *res; + phys_addr_t tcsr_check; int ret; chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); @@ -200,9 +222,34 @@ static int eud_probe(struct platform_device *pdev) if (IS_ERR(chip->base)) return PTR_ERR(chip->base); - chip->mode_mgr = devm_platform_ioremap_resource(pdev, 1); - if (IS_ERR(chip->mode_mgr)) - return PTR_ERR(chip->mode_mgr); + /* + * EUD block on a few Qualcomm SoCs needs secure register access. + * Check for the same via SoC specific config data. + */ + chip->eud_cfg = of_device_get_match_data(&pdev->dev); + if (chip->eud_cfg) { + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) + return dev_err_probe(chip->dev, -ENODEV, + "failed to get secure_mode_mgr reg base\n"); + + chip->secure_mode_mgr = res->start; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tcsr-base"); + if (!res) + return dev_err_probe(chip->dev, -ENODEV, + "failed to get tcsr reg base\n"); + + tcsr_check = res->start + chip->eud_cfg->tcsr_check_offset; + + ret = qcom_scm_io_writel(tcsr_check, TCSR_CHECK_EN); + if (ret) + return dev_err_probe(chip->dev, ret, "failed to write tcsr check reg\n"); + } else { + chip->mode_mgr = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(chip->mode_mgr)) + return PTR_ERR(chip->mode_mgr); + } chip->irq = platform_get_irq(pdev, 0); ret = devm_request_threaded_irq(&pdev->dev, chip->irq, handle_eud_irq, @@ -228,8 +275,13 @@ static void eud_remove(struct platform_device *pdev) disable_irq_wake(chip->irq); } +static const struct eud_soc_cfg sm6115_eud_cfg = { + .tcsr_check_offset = 0x25018, +}; + static const struct of_device_id eud_dt_match[] = { { .compatible = "qcom,sc7280-eud" }, + { .compatible = "qcom,sm6115-eud", .data = &sm6115_eud_cfg }, { } }; MODULE_DEVICE_TABLE(of, eud_dt_match);