From patchwork Thu Mar 25 16:40:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 1458449 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=HDU9cNu0; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4F5rVw3ptwz9sVt for ; Fri, 26 Mar 2021 03:42:32 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229882AbhCYQl5 (ORCPT ); Thu, 25 Mar 2021 12:41:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229798AbhCYQl0 (ORCPT ); Thu, 25 Mar 2021 12:41:26 -0400 Received: from mail-wm1-x330.google.com (mail-wm1-x330.google.com [IPv6:2a00:1450:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6053BC06174A; Thu, 25 Mar 2021 09:41:26 -0700 (PDT) Received: by mail-wm1-x330.google.com with SMTP id j4-20020a05600c4104b029010c62bc1e20so1543302wmi.3; Thu, 25 Mar 2021 09:41:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=+mgUd3FfBG5V1WiGiq7Sg4bslUVk/BI3WMScbkkNnvo=; b=HDU9cNu0XKgix9QOGNKr3nLH70tx8Q2u5VwwF7ZMJ3ce5mq0PCs8Pv97HWyNwjeXGR RxBOyzvnY7d3oztATGgWrUCzWHhdHgMJ+eO02W/3xsCZ8QCVf9z9K1nqg/5tpHN9Z4tE t2eoxQLNO+KbxhTu3CArygjVjJ4vxUe/b8whrkEeKE3FqQsS3Hkhyr0u1czxHzAsoWCd hI4u5/bdf4IoTewIn1k2DLFGKhp45dU/3U3y7mBk9+MPcdfCU+oTcCCuRaADPQ8O5/I7 0U50ulzmGzBiBzNQ0V2rtxqpVOakvqQcpwVh07B46hC/mFlFvzX8fqNFADxhUUhQRCF4 qidA== 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=+mgUd3FfBG5V1WiGiq7Sg4bslUVk/BI3WMScbkkNnvo=; b=mWyzE7tJXLLE9JGT0MnC6+uxDSc9CeiOHgpa56+O9VZeGZcNzjBouvFvi1Nmm70U6r uonshhS3eL6Zz4US0hKxvvU3gr7jZF+N9Qp/V92V6Hotc8gl/5tn4NjtYWZxSMAwIHDR RwlBV4tbHM9CdrK5clw5HkxbIVPWOMuTUx7oXsDiDS9C/VmrC1usV99G/CXKB6NeT4zQ srEjbhP9CKmBM+BeZ9IhRj2dBMYr0Tc2B2v7QTOi2HRBuify5Fy7oMF4L9zks5pgcDbt efHxdsI0MWCBPgUrcPgm24MtHnusKFVl2Ys1iwDWZw7Xa/G8OgDVfu1SR5LiJTjHLwyt SCmw== X-Gm-Message-State: AOAM530udnw2AeOmMHuh31/TTArYR1QmNBhPh+FYxRWqPQBroxL6J2vK DSIusYI6wA36S8dASi6NGGE= X-Google-Smtp-Source: ABdhPJwecxKmDPs8sTv0ICfk8y8FLcz6o1BYpe4/XmBXW2UfZiktm5sFyZ8X94fBst1OiLGjH2miEg== X-Received: by 2002:a1c:f614:: with SMTP id w20mr8746936wmc.70.1616690485017; Thu, 25 Mar 2021 09:41:25 -0700 (PDT) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id n3sm7141949wmi.7.2021.03.25.09.41.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Mar 2021 09:41:23 -0700 (PDT) From: Thierry Reding To: Vinod Koul , Greg Kroah-Hartman Cc: Kishon Vijay Abraham I , Mathias Nyman , JC Kuo , Jon Hunter , linux-tegra@vger.kernel.org, linux-phy@lists.infradead.org, linux-usb@vger.kernel.org Subject: [PATCH v8 10/13] phy: tegra: xusb: Tegra210 host mode VBUS control Date: Thu, 25 Mar 2021 17:40:54 +0100 Message-Id: <20210325164057.793954-11-thierry.reding@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210325164057.793954-1-thierry.reding@gmail.com> References: <20210325164057.793954-1-thierry.reding@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org From: JC Kuo To support XUSB host controller ELPG, this commit moves VBUS control .phy_power_on()/.phy_power_off() to .phy_init()/.phy_exit(). When XUSB host controller enters ELPG, host driver invokes .phy_power_off(), VBUS should remain ON so that USB devices will not disconnect. VBUS can be turned OFF when host driver invokes .phy_exit() which indicates disabling a USB port. Signed-off-by: JC Kuo Signed-off-by: Thierry Reding Acked-By: Vinod Koul --- drivers/phy/tegra/xusb-tegra210.c | 52 ++++++++++++++++++++++++------- 1 file changed, 40 insertions(+), 12 deletions(-) diff --git a/drivers/phy/tegra/xusb-tegra210.c b/drivers/phy/tegra/xusb-tegra210.c index 8af73ba78ad7..9d39f812fb43 100644 --- a/drivers/phy/tegra/xusb-tegra210.c +++ b/drivers/phy/tegra/xusb-tegra210.c @@ -1819,8 +1819,25 @@ static int tegra210_usb2_phy_init(struct phy *phy) { struct tegra_xusb_lane *lane = phy_get_drvdata(phy); struct tegra_xusb_padctl *padctl = lane->pad->padctl; + unsigned int index = lane->index; + struct tegra_xusb_usb2_port *port; + int err; u32 value; + port = tegra_xusb_find_usb2_port(padctl, index); + if (!port) { + dev_err(&phy->dev, "no port found for USB2 lane %u\n", index); + return -ENODEV; + } + + if (port->supply && port->mode == USB_DR_MODE_HOST) { + err = regulator_enable(port->supply); + if (err) + return err; + } + + mutex_lock(&padctl->lock); + value = padctl_readl(padctl, XUSB_PADCTL_USB2_PAD_MUX); value &= ~(XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_MASK << XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT); @@ -1828,11 +1845,30 @@ static int tegra210_usb2_phy_init(struct phy *phy) XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT; padctl_writel(padctl, value, XUSB_PADCTL_USB2_PAD_MUX); + mutex_unlock(&padctl->lock); + return 0; } static int tegra210_usb2_phy_exit(struct phy *phy) { + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + struct tegra_xusb_padctl *padctl = lane->pad->padctl; + struct tegra_xusb_usb2_port *port; + int err; + + port = tegra_xusb_find_usb2_port(padctl, lane->index); + if (!port) { + dev_err(&phy->dev, "no port found for USB2 lane %u\n", lane->index); + return -ENODEV; + } + + if (port->supply && port->mode == USB_DR_MODE_HOST) { + err = regulator_disable(port->supply); + if (err) + return err; + } + return 0; } @@ -1953,6 +1989,8 @@ static int tegra210_usb2_phy_power_on(struct phy *phy) priv = to_tegra210_xusb_padctl(padctl); + mutex_lock(&padctl->lock); + if (port->usb3_port_fake != -1) { value = padctl_readl(padctl, XUSB_PADCTL_SS_PORT_MAP); value &= ~XUSB_PADCTL_SS_PORT_MAP_PORTX_MAP_MASK( @@ -2046,14 +2084,6 @@ static int tegra210_usb2_phy_power_on(struct phy *phy) padctl_writel(padctl, value, XUSB_PADCTL_USB2_BATTERY_CHRG_OTGPADX_CTL1(index)); - if (port->supply && port->mode == USB_DR_MODE_HOST) { - err = regulator_enable(port->supply); - if (err) - return err; - } - - mutex_lock(&padctl->lock); - if (pad->enable > 0) { pad->enable++; mutex_unlock(&padctl->lock); @@ -2062,7 +2092,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy) err = clk_prepare_enable(pad->clk); if (err) - goto disable_regulator; + goto out; value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1); value &= ~((XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_MASK << @@ -2094,8 +2124,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy) return 0; -disable_regulator: - regulator_disable(port->supply); +out: mutex_unlock(&padctl->lock); return err; } @@ -2154,7 +2183,6 @@ static int tegra210_usb2_phy_power_off(struct phy *phy) padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL0); out: - regulator_disable(port->supply); mutex_unlock(&padctl->lock); return 0; }