From patchwork Mon Dec 30 11:09:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nagarjuna Kristam X-Patchwork-Id: 11312951 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 7AF2F139A for ; Mon, 30 Dec 2019 11:14:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F0DC206DB for ; Mon, 30 Dec 2019 11:14:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="r5jLBJPH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727497AbfL3LOC (ORCPT ); Mon, 30 Dec 2019 06:14:02 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:1271 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727471AbfL3LOA (ORCPT ); Mon, 30 Dec 2019 06:14:00 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 30 Dec 2019 03:13:45 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 30 Dec 2019 03:14:00 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 30 Dec 2019 03:14:00 -0800 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 30 Dec 2019 11:13:59 +0000 Received: from hqnvemgw03.nvidia.com (10.124.88.68) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 30 Dec 2019 11:13:59 +0000 Received: from nkristam-ubuntu.nvidia.com (Not Verified[10.19.64.167]) by hqnvemgw03.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 30 Dec 2019 03:13:58 -0800 From: Nagarjuna Kristam To: , , , , , , CC: , , , , Nagarjuna Kristam Subject: [Patch V3 06/18] phy: tegra: xusb: Add set_mode support for USB 2 phy on Tegra210 Date: Mon, 30 Dec 2019 16:39:43 +0530 Message-ID: <1577704195-2535-7-git-send-email-nkristam@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1577704195-2535-1-git-send-email-nkristam@nvidia.com> References: <1577704195-2535-1-git-send-email-nkristam@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1577704426; bh=DCQhIUzBCXDWuguBM5o8GhZmpVPraWY+DistYeYFZ9A=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=r5jLBJPHu5ysnOU3JjbjEHP2uE+CrFZR+zGftdqqzTpnneHsU2rPQAVEUAeCVEjwX 8Bt8dk1E+tP1BjHd/MOKu257AfsRHZ+qdwURDwEBAjssCHFF/pEKqkzpzUnDmop/TI mvYewkFLMwZYxMmtQJgN1h+Fsbo5tBejRtNTLuYbUtaQcH7XJ1YVYoZ+PA8y/9wjyD 9Wzyg6zXLHsLC2w3n9acIVtJGd1VqNqP+RJKz4JxQ/ZsP0PVuVqdFd14H9FftgS6Ua bZFpTLZARkTafJCSyRRhdXsUdwuf73HC4CBUyiy0HrZICjN6ns19yabphYsL3PyM0z hbmvNUOCfhP2g== Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Add support for set_mode on USB 2 phy. This allow XUSB host/device mode drivers to configure the hardware to corresponding modes. Signed-off-by: Nagarjuna Kristam Acked-by: Thierry Reding --- V2-V3: - No changes in this version --- drivers/phy/tegra/xusb-tegra210.c | 126 ++++++++++++++++++++++++++++++-------- 1 file changed, 99 insertions(+), 27 deletions(-) diff --git a/drivers/phy/tegra/xusb-tegra210.c b/drivers/phy/tegra/xusb-tegra210.c index 394913b..6610b1d7 100644 --- a/drivers/phy/tegra/xusb-tegra210.c +++ b/drivers/phy/tegra/xusb-tegra210.c @@ -236,6 +236,7 @@ #define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT 18 #define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_MASK 0xf #define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_FLOATING 8 +#define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_GROUNDED 0 struct tegra210_xusb_fuse_calibration { u32 hs_curr_level[4]; @@ -935,6 +936,98 @@ static int tegra210_usb2_phy_exit(struct phy *phy) return tegra210_xusb_padctl_disable(lane->pad->padctl); } +static int tegra210_xusb_padctl_vbus_override(struct tegra_xusb_padctl *padctl, + bool status) +{ + u32 value; + + dev_dbg(padctl->dev, "%s vbus override\n", status ? "set" : "clear"); + + value = padctl_readl(padctl, XUSB_PADCTL_USB2_VBUS_ID); + + if (status) { + value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON; + value &= ~(XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_MASK << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT); + value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_FLOATING << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT; + } else { + value &= ~XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON; + } + + padctl_writel(padctl, value, XUSB_PADCTL_USB2_VBUS_ID); + + return 0; +} + +static int tegra210_xusb_padctl_id_override(struct tegra_xusb_padctl *padctl, + bool status) +{ + u32 value; + + dev_dbg(padctl->dev, "%s id override\n", status ? "set" : "clear"); + + value = padctl_readl(padctl, XUSB_PADCTL_USB2_VBUS_ID); + + if (status) { + if (value & XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON) { + value &= ~XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON; + padctl_writel(padctl, value, XUSB_PADCTL_USB2_VBUS_ID); + usleep_range(1000, 2000); + + value = padctl_readl(padctl, XUSB_PADCTL_USB2_VBUS_ID); + } + + value &= ~(XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_MASK << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT); + value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_GROUNDED << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT; + } else { + value &= ~(XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_MASK << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT); + value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_FLOATING << + XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT; + } + + padctl_writel(padctl, value, XUSB_PADCTL_USB2_VBUS_ID); + + return 0; +} + +static int tegra210_usb2_phy_set_mode(struct phy *phy, enum phy_mode mode, + int submode) +{ + struct tegra_xusb_lane *lane = phy_get_drvdata(phy); + struct tegra_xusb_padctl *padctl = lane->pad->padctl; + struct tegra_xusb_usb2_port *port = tegra_xusb_find_usb2_port(padctl, + lane->index); + int err = 0; + + mutex_lock(&padctl->lock); + + dev_dbg(&port->base.dev, "%s: mode %d", __func__, mode); + + if (mode == PHY_MODE_USB_OTG) { + if (submode == USB_ROLE_HOST) { + tegra210_xusb_padctl_id_override(padctl, true); + + err = regulator_enable(port->supply); + } else if (submode == USB_ROLE_DEVICE) { + tegra210_xusb_padctl_vbus_override(padctl, true); + } else if (submode == USB_ROLE_NONE) { + if (regulator_is_enabled(port->supply)) + regulator_disable(port->supply); + + tegra210_xusb_padctl_id_override(padctl, false); + tegra210_xusb_padctl_vbus_override(padctl, false); + } + } + + mutex_unlock(&padctl->lock); + + return err; +} + static int tegra210_usb2_phy_power_on(struct phy *phy) { struct tegra_xusb_lane *lane = phy_get_drvdata(phy); @@ -1048,9 +1141,11 @@ static int tegra210_usb2_phy_power_on(struct phy *phy) padctl_writel(padctl, value, XUSB_PADCTL_USB2_BATTERY_CHRG_OTGPADX_CTL1(index)); - err = regulator_enable(port->supply); - if (err) - return err; + if (port->supply && port->mode == USB_DR_MODE_HOST) { + err = regulator_enable(port->supply); + if (err) + return err; + } mutex_lock(&padctl->lock); @@ -1164,6 +1259,7 @@ static const struct phy_ops tegra210_usb2_phy_ops = { .exit = tegra210_usb2_phy_exit, .power_on = tegra210_usb2_phy_power_on, .power_off = tegra210_usb2_phy_power_off, + .set_mode = tegra210_usb2_phy_set_mode, .owner = THIS_MODULE, }; @@ -2023,30 +2119,6 @@ static const struct tegra_xusb_port_ops tegra210_usb3_port_ops = { .map = tegra210_usb3_port_map, }; -static int tegra210_xusb_padctl_vbus_override(struct tegra_xusb_padctl *padctl, - bool status) -{ - u32 value; - - dev_dbg(padctl->dev, "%s vbus override\n", status ? "set" : "clear"); - - value = padctl_readl(padctl, XUSB_PADCTL_USB2_VBUS_ID); - - if (status) { - value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON; - value &= ~(XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_MASK << - XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT); - value |= XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_FLOATING << - XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_SHIFT; - } else { - value &= ~XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_VBUS_ON; - } - - padctl_writel(padctl, value, XUSB_PADCTL_USB2_VBUS_ID); - - return 0; -} - static int tegra210_utmi_port_reset(struct phy *phy) { struct tegra_xusb_padctl *padctl;