From patchwork Thu Sep 10 13:01:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Bailon X-Patchwork-Id: 11767803 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5A74492C for ; Thu, 10 Sep 2020 13:02:13 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 0C7E32087C for ; Thu, 10 Sep 2020 13:02:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="2gQujwQc"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="PrxFIm+q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C7E32087C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=HdwEILX9msB+Da+D7DAog2oQbGVmlt/HQ7E5uZPLkWo=; b=2gQujwQcrO9abQEOwlQ/hbK8y 3/Uv3rj0DZDmBzpD1DhioKSd23yl8+ErCLXY1obYF8Jmc1H/b85pkh426TdJcBVjOP/YBSBLajNqX 4HJKvNCzcaWUcb5G9JCZnElBLQASimLsQsPs/HmP/A97CosUaR+lx89Ql1xb3QX6XGFE7vNPN1Xko jo3DqFUGex4JTqRUtAozw1a1ZndlhsOquLl2JBcSjqpKBUHuoGyeCaZZgAE+pq982YebrWkyWUrpj ZjCqe08NsiPNzWKJX4PMzLIw+RNdRTKB7FeqWmA7gvaUTZTUvFJycWgfYDnAwK/9YrQU2SDQhGNWu tgwaQXsPg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGMDI-0000rd-ID; Thu, 10 Sep 2020 13:02:08 +0000 Received: from mail-wr1-x441.google.com ([2a00:1450:4864:20::441]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGMCs-0000fW-9H for linux-mediatek@lists.infradead.org; Thu, 10 Sep 2020 13:01:48 +0000 Received: by mail-wr1-x441.google.com with SMTP id s12so6580751wrw.11 for ; Thu, 10 Sep 2020 06:01:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0sqmFv2eHfj0bGsGV6vzOEYNJHRHbaIrZSb1iBx+VKQ=; b=PrxFIm+qcOE/pECnf7g0zilV+8j8fE3iImaK+uxbPgjn59kMBEZfMkdg4ORS781Smo lYYl/sJgPqyCEaARQ2FuV8iZn4IkgLY8S5J6CGi9aDUeXATZp/+Q5eV6UQmP/miEogq8 ZQA/3HYv8K1ArxRnxNiB8N1yKMM6IgKO2ISHyOYHMYCR+oNFpwDb3i5YVB3oglVAacGM bX+vw9VM/NL9SuURbUIO+L6oPO8ZswxA7VKZHmYZlSuBOjKPCPEjBIlNI6rP0ON+ouG6 D1QMY56UgRlfD3tqTVBPpsM3gfnf6I9NrDQVdAPKC5OJ6h8I5FV2JRfm6Ieo0VWAY7Vd KB0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0sqmFv2eHfj0bGsGV6vzOEYNJHRHbaIrZSb1iBx+VKQ=; b=kbiusveJsxSHBLTuJeKPM3W3aZazH478TQEl3kdLoL/4J76ULEto8b3+5PngRem9ff 5GbhaiAk86CJGyzbqOE2KPqptK4ysLV601MfsPWqg8ZXw0roxKuVNoo1I69R8WV6Gt1D QtcQUL3UH0L6/jKdXmFlzwj2/yhIO+WQ7ZUaQf0UP8VQ52kPc53/GtKTiuIbYyyCaXFI TeNBAL6gUwGSuv71/NqSbcUSUfwRrShz2jx7la4Soc/siBeeJPYrrpY4Pr4eixRBqzC9 M3BusTdNqmaJm1+iq11O7+64DNgMhHAd4kVRgnUwifpXYzTc9Awrj+sJRj+ibTSnj1WQ XXaA== X-Gm-Message-State: AOAM531xpZKcP+DA0HYXVwLpaOchXsmdLL2BYOcUvbNhKfjFrzcW0rA3 OCaf/Dm3Su16YFxqlCFledYABQ== X-Google-Smtp-Source: ABdhPJyYLi78UG6+M+KyTBE9epJZAgjW7K+uFBmHRxFPQFLB+d//S0LjdkoG9ek90bxop5qFrF9GSg== X-Received: by 2002:adf:db43:: with SMTP id f3mr9538768wrj.219.1599742901335; Thu, 10 Sep 2020 06:01:41 -0700 (PDT) Received: from alex-xps13.baylibre.local (laubervilliers-658-1-213-31.w90-63.abo.wanadoo.fr. [90.63.244.31]) by smtp.gmail.com with ESMTPSA id y1sm9488269wru.87.2020.09.10.06.01.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2020 06:01:40 -0700 (PDT) From: Alexandre Bailon To: ohad@wizery.com, bjorn.andersson@linaro.org, robh+dt@kernel.org, matthias.bgg@gmail.com, mathieu.poirier@linaro.org Subject: [PATCH v2 3/4] remoteproc: mtk_vpu_rproc: Add support of JTAG Date: Thu, 10 Sep 2020 15:01:47 +0200 Message-Id: <20200910130148.8734-4-abailon@baylibre.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200910130148.8734-1-abailon@baylibre.com> References: <20200910130148.8734-1-abailon@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200910_090142_360119_58CD4327 X-CRM114-Status: GOOD ( 22.90 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:441 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, stephane.leprovost@mediatek.com, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, gpain@baylibre.com, linux-mediatek@lists.infradead.org, Alexandre Bailon , linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org The DSP could be debugged using JTAG. The support of JTAG could enabled at build time and it could be enabled using debugfs. Signed-off-by: Alexandre Bailon --- drivers/remoteproc/Kconfig | 9 +++ drivers/remoteproc/mtk_apu.c | 151 ++++++++++++++++++++++++++++++++++- 2 files changed, 159 insertions(+), 1 deletion(-) diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 4ebea57bf4c8..310462346bd8 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -61,6 +61,15 @@ config MTK_APU It's safe to say N here. +config MTK_APU_JTAG + bool "Enable support of JTAG" + depends on MTK_APU + help + Say y to enable support of JTAG. + By default, JTAG will remain disabled until it is enabled using + debugfs: remoteproc/remoteproc0/jtag. Write 1 to enable it and + 0 to disable it. + config OMAP_REMOTEPROC tristate "OMAP remoteproc support" depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX diff --git a/drivers/remoteproc/mtk_apu.c b/drivers/remoteproc/mtk_apu.c index 6d2f577cfde5..07157fdc24ba 100644 --- a/drivers/remoteproc/mtk_apu.c +++ b/drivers/remoteproc/mtk_apu.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -14,6 +15,7 @@ #include #include #include +#include #include #include @@ -48,6 +50,11 @@ #define CORE_DEFAULT1 (0x00000140) #define CORE_DEFAULT0_ARUSER_IDMA_USE_IOMMU (0x10 << 0) #define CORE_DEFAULT0_AWUSER_IDMA_USE_IOMMU (0x10 << 5) +#define CORE_DEFAULT2 (0x00000144) +#define CORE_DEFAULT2_DBG_EN BIT(3) +#define CORE_DEFAULT2_NIDEN BIT(2) +#define CORE_DEFAULT2_SPNIDEN BIT(1) +#define CORE_DEFAULT2_SPIDEN BIT(0) #define CORE_XTENSA_ALTRESETVEC (0x000001F8) struct mtk_apu_rproc { @@ -57,6 +64,13 @@ struct mtk_apu_rproc { void __iomem *base; int irq; struct clk_bulk_data clks[3]; + +#ifdef CONFIG_MTK_APU_JTAG + struct pinctrl *pinctrl; + struct pinctrl_state *pinctrl_jtag; + bool jtag_enabled; + struct mutex jtag_mutex; +#endif }; static int mtk_apu_rproc_prepare(struct rproc *rproc) @@ -166,6 +180,137 @@ static irqreturn_t handle_event(int irq, void *data) return IRQ_HANDLED; } +#ifdef CONFIG_MTK_APU_JTAG + +static int apu_enable_jtag(struct mtk_apu_rproc *apu_rproc) +{ + int ret = 0; + + mutex_lock(&apu_rproc->jtag_mutex); + if (apu_rproc->jtag_enabled) { + ret = -EINVAL; + goto err_mutex_unlock; + } + + writel(CORE_DEFAULT2_SPNIDEN | CORE_DEFAULT2_SPIDEN | + CORE_DEFAULT2_NIDEN | CORE_DEFAULT2_DBG_EN, + apu_rproc->base + CORE_DEFAULT2); + + apu_rproc->jtag_enabled = 1; + +err_mutex_unlock: + mutex_unlock(&apu_rproc->jtag_mutex); + + return ret; +} + +static int apu_disable_jtag(struct mtk_apu_rproc *apu_rproc) +{ + int ret = 0; + + mutex_lock(&apu_rproc->jtag_mutex); + if (!apu_rproc->jtag_enabled) { + ret = -EINVAL; + goto err_mutex_unlock; + } + + writel(0, apu_rproc->base + CORE_DEFAULT2); + + apu_rproc->jtag_enabled = 0; + +err_mutex_unlock: + mutex_unlock(&apu_rproc->jtag_mutex); + + return ret; +} + +static ssize_t rproc_jtag_read(struct file *filp, char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct rproc *rproc = filp->private_data; + struct mtk_apu_rproc *apu_rproc = (struct mtk_apu_rproc *)rproc->priv; + char *buf = apu_rproc->jtag_enabled ? "enabled\n" : "disabled\n"; + + return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf)); +} + +static ssize_t rproc_jtag_write(struct file *filp, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct rproc *rproc = filp->private_data; + struct mtk_apu_rproc *apu_rproc = (struct mtk_apu_rproc *)rproc->priv; + char buf[10]; + int ret; + + if (count < 1 || count > sizeof(buf)) + return -EINVAL; + + ret = copy_from_user(buf, user_buf, count); + if (ret) + return -EFAULT; + + /* remove end of line */ + if (buf[count - 1] == '\n') + buf[count - 1] = '\0'; + + if (!strncmp(buf, "enabled", count)) + ret = apu_enable_jtag(apu_rproc); + else if (!strncmp(buf, "disabled", count)) + ret = apu_disable_jtag(apu_rproc); + else + return -EINVAL; + + return ret ? ret : count; +} + +static const struct file_operations rproc_jtag_ops = { + .read = rproc_jtag_read, + .write = rproc_jtag_write, + .open = simple_open, +}; + +static int apu_jtag_probe(struct mtk_apu_rproc *apu_rproc) +{ + int ret; + + if (!apu_rproc->rproc->dbg_dir) + return -ENODEV; + + apu_rproc->pinctrl = devm_pinctrl_get(apu_rproc->dev); + if (IS_ERR(apu_rproc->pinctrl)) { + dev_warn(apu_rproc->dev, "Failed to find JTAG pinctrl\n"); + return PTR_ERR(apu_rproc->pinctrl); + } + + apu_rproc->pinctrl_jtag = pinctrl_lookup_state(apu_rproc->pinctrl, + "jtag"); + if (IS_ERR(apu_rproc->pinctrl_jtag)) + return PTR_ERR(apu_rproc->pinctrl_jtag); + + ret = pinctrl_select_state(apu_rproc->pinctrl, + apu_rproc->pinctrl_jtag); + if (ret < 0) + return ret; + + mutex_init(&apu_rproc->jtag_mutex); + + debugfs_create_file("jtag", 0600, apu_rproc->rproc->dbg_dir, + apu_rproc->rproc, &rproc_jtag_ops); + + return 0; +} +#else +static int apu_jtag_probe(struct mtk_apu_rproc *apu_rproc) +{ + return 0; +} + +static int apu_disable_jtag(struct mtk_apu_rproc *apu_rproc) +{ + return 0; +} +#endif /* CONFIG_MTK_APU_JTAG */ + static int mtk_apu_rproc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -242,6 +387,10 @@ static int mtk_apu_rproc_probe(struct platform_device *pdev) goto free_mem; } + ret = apu_jtag_probe(apu_rproc); + if (ret) + dev_warn(dev, "Failed to configure jtag\n"); + return 0; free_mem: @@ -259,7 +408,7 @@ static int mtk_apu_rproc_remove(struct platform_device *pdev) struct device *dev = &pdev->dev; disable_irq(apu_rproc->irq); - + apu_disable_jtag(apu_rproc); rproc_del(rproc); of_reserved_mem_device_release(dev); rproc_free(rproc);