From patchwork Thu Apr 16 12:19:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 11492973 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 BB2E914B4 for ; Thu, 16 Apr 2020 12:21:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E1862192A for ; Thu, 16 Apr 2020 12:21:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="E3N/f5JC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2635473AbgDPMVz (ORCPT ); Thu, 16 Apr 2020 08:21:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2635251AbgDPMTS (ORCPT ); Thu, 16 Apr 2020 08:19:18 -0400 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A064C061A41 for ; Thu, 16 Apr 2020 05:19:18 -0700 (PDT) Received: by mail-wm1-x342.google.com with SMTP id o81so4346824wmo.2 for ; Thu, 16 Apr 2020 05:19:18 -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=jGB5cq+Z3DlBH7Q1dU3UzrTQmEPHELzeDKf4/5h1tYY=; b=E3N/f5JCC6MuZG2N0ETf1nK3o0YeivJllTmKw4MySeCopaMQl/K5kRc9jERhgDPX/J 9iYeII8DD0X8X22RqCFjymNGj0asnDJLGcgE57BxGMqhsJdHN8FSzIaTf86NWc0Ubwjk HWZajbjra7Lq20PGRX00IQGC5as0IBwg6jPKpOYOGo6Vq988FjguozhOEcoblbwItveX BucqU2FbjOge4L9WZDPnu3hJI72fktlIv+Q3cEikTsIuLX9KAI+RDA7l6rFCvG+IrWp/ B+5uUF2kFtreUFmwEuOFhANt8RM2WqYS9GIn8L1iQTAVg1Tj65UqzroRMWTgJap/zWI+ CMhw== 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=jGB5cq+Z3DlBH7Q1dU3UzrTQmEPHELzeDKf4/5h1tYY=; b=jxZsyRm2KvRx5DEOJhsZ8tc8O86yz5nlicxZLI33tPIS4OfO/Of5sJ+oTKdeJXJboh Gn1HNdEEFpLUeuWl8wVvo1GSLoV/DPq7hVZ90yRr6n53C8AtHv0zjBfN8nE1HzBEyg5h zkZR+E77hk2ZrBkCY5JsPMdiZ7ivRpa081J4QD7VtRzZpkOx/6zt8d8dt3Yv/gMeML3R I0zHmBOIYGIIMqN6nSfeokQZhgXbSMIgJel05ajBLXoZXP0t3LDZW5VcPy2YwAjc1WPJ Qqc3/4IVdmKA/D6J7Y+nhH8DY8qLSCmjd/yHt5dYnAdD779bFJgMnjYS3eeH5FjYCxi3 /VIw== X-Gm-Message-State: AGi0PuY2wpZ4e3U9b4Ue1tp2EPcQ2WEZ7W9oB78yr+CK+axzlJx7Drzf azTczZpajuop7lsa1MZldATmNg== X-Google-Smtp-Source: APiQypL6UZwdxpiYHe9Lgge4dtKM9rLPpfAuHpY9C1/ZB0P1pZTcTbR8PMYECtU0CgARumYZ4gOt5w== X-Received: by 2002:a1c:bd54:: with SMTP id n81mr4472758wmf.141.1587039556955; Thu, 16 Apr 2020 05:19:16 -0700 (PDT) Received: from localhost.localdomain ([2a01:e35:2ec0:82b0:39cc:a07:8b48:cc56]) by smtp.gmail.com with ESMTPSA id i13sm22035602wro.50.2020.04.16.05.19.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2020 05:19:16 -0700 (PDT) From: Neil Armstrong To: kishon@ti.com, balbi@kernel.org, khilman@baylibre.com, martin.blumenstingl@googlemail.com Cc: Neil Armstrong , linux-amlogic@lists.infradead.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/8] usb: dwc3: meson-g12a: refactor usb init Date: Thu, 16 Apr 2020 14:19:03 +0200 Message-Id: <20200416121910.12723-2-narmstrong@baylibre.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20200416121910.12723-1-narmstrong@baylibre.com> References: <20200416121910.12723-1-narmstrong@baylibre.com> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Refactor the USB init code patch to handle the Amlogic GXL/GXM needing to initialize the OTG port as Peripheral mode for the DWC2 IP to probe correctly. A secondary, post_init callback is added to setup the OTG PHY mode after powering up the PHYs and before probing the DWC2 and DWC3 controllers. Signed-off-by: Neil Armstrong Reviewed-by: Martin Blumenstingl --- drivers/usb/dwc3/dwc3-meson-g12a.c | 52 +++++++++++++++++++++--------- 1 file changed, 37 insertions(+), 15 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c index 7027ee2ee4ab..e7a6d05f2a72 100644 --- a/drivers/usb/dwc3/dwc3-meson-g12a.c +++ b/drivers/usb/dwc3/dwc3-meson-g12a.c @@ -140,6 +140,8 @@ struct dwc3_meson_g12a_drvdata { enum phy_mode mode); int (*set_phy_mode)(struct dwc3_meson_g12a *priv, int i, enum phy_mode mode); + int (*usb_init)(struct dwc3_meson_g12a *priv); + int (*usb_post_init)(struct dwc3_meson_g12a *priv); }; static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, @@ -151,6 +153,8 @@ static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, static int dwc3_meson_g12a_set_phy_mode(struct dwc3_meson_g12a *priv, int i, enum phy_mode mode); +static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv); + static struct dwc3_meson_g12a_drvdata g12a_drvdata = { .otg_switch_supported = true, .clks = meson_g12a_clocks, @@ -160,6 +164,7 @@ static struct dwc3_meson_g12a_drvdata g12a_drvdata = { .setup_regmaps = dwc3_meson_g12a_setup_regmaps, .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, .set_phy_mode = dwc3_meson_g12a_set_phy_mode, + .usb_init = dwc3_meson_g12a_usb_init, }; static struct dwc3_meson_g12a_drvdata a1_drvdata = { @@ -171,6 +176,7 @@ static struct dwc3_meson_g12a_drvdata a1_drvdata = { .setup_regmaps = dwc3_meson_g12a_setup_regmaps, .usb2_init_phy = dwc3_meson_g12a_usb2_init_phy, .set_phy_mode = dwc3_meson_g12a_set_phy_mode, + .usb_init = dwc3_meson_g12a_usb_init, }; struct dwc3_meson_g12a { @@ -231,15 +237,11 @@ static int dwc3_meson_g12a_usb2_init_phy(struct dwc3_meson_g12a *priv, int i, return 0; } -static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) +static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { int i, ret; - if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) - priv->otg_phy_mode = PHY_MODE_USB_DEVICE; - else - priv->otg_phy_mode = PHY_MODE_USB_HOST; - for (i = 0; i < priv->drvdata->num_phys; ++i) { if (!priv->phys[i]) continue; @@ -247,7 +249,7 @@ static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) if (!strstr(priv->drvdata->phy_names[i], "usb2")) continue; - ret = priv->drvdata->usb2_init_phy(priv, i, priv->otg_phy_mode); + ret = priv->drvdata->usb2_init_phy(priv, i, mode); if (ret) return ret; } @@ -284,9 +286,10 @@ static void dwc3_meson_g12a_usb3_init(struct dwc3_meson_g12a *priv) FIELD_PREP(USB_R1_P30_PCS_TX_SWING_FULL_MASK, 127)); } -static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) +static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { - if (priv->otg_phy_mode == PHY_MODE_USB_DEVICE) { + if (mode == PHY_MODE_USB_DEVICE) { regmap_update_bits(priv->usb_glue_regmap, USB_R0, USB_R0_U2D_ACT, USB_R0_U2D_ACT); regmap_update_bits(priv->usb_glue_regmap, USB_R0, @@ -301,11 +304,12 @@ static void dwc3_meson_g12a_usb_otg_apply_mode(struct dwc3_meson_g12a *priv) } } -static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) +static int dwc3_meson_g12a_usb_init_glue(struct dwc3_meson_g12a *priv, + enum phy_mode mode) { int ret; - ret = dwc3_meson_g12a_usb2_init(priv); + ret = dwc3_meson_g12a_usb2_init(priv, mode); if (ret) return ret; @@ -327,7 +331,7 @@ static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) if (priv->usb3_ports) dwc3_meson_g12a_usb3_init(priv); - dwc3_meson_g12a_usb_otg_apply_mode(priv); + dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); return 0; } @@ -406,7 +410,7 @@ static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, if (ret) return ret; - dwc3_meson_g12a_usb_otg_apply_mode(priv); + dwc3_meson_g12a_usb_otg_apply_mode(priv, mode); return 0; } @@ -555,6 +559,11 @@ static int dwc3_meson_g12a_setup_regmaps(struct dwc3_meson_g12a *priv, return 0; } +static int dwc3_meson_g12a_usb_init(struct dwc3_meson_g12a *priv) +{ + return dwc3_meson_g12a_usb_init_glue(priv, priv->otg_phy_mode); +} + static int dwc3_meson_g12a_probe(struct platform_device *pdev) { struct dwc3_meson_g12a *priv; @@ -622,7 +631,12 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) /* Get dr_mode */ priv->otg_mode = usb_get_dr_mode(dev); - ret = dwc3_meson_g12a_usb_init(priv); + if (priv->otg_mode == USB_DR_MODE_PERIPHERAL) + priv->otg_phy_mode = PHY_MODE_USB_DEVICE; + else + priv->otg_phy_mode = PHY_MODE_USB_HOST; + + ret = priv->drvdata->usb_init(priv); if (ret) goto err_disable_clks; @@ -640,6 +654,12 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) goto err_phys_exit; } + if (priv->drvdata->usb_post_init) { + ret = priv->drvdata->usb_post_init(priv); + if (ret) + goto err_phys_power; + } + ret = of_platform_populate(np, NULL, NULL, dev); if (ret) goto err_phys_power; @@ -741,7 +761,9 @@ static int __maybe_unused dwc3_meson_g12a_resume(struct device *dev) reset_control_deassert(priv->reset); - dwc3_meson_g12a_usb_init(priv); + ret = priv->drvdata->usb_init(priv); + if (ret) + return ret; /* Init PHYs */ for (i = 0 ; i < PHY_COUNT ; ++i) {