From patchwork Wed Dec 18 09:16:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nagarjuna Kristam X-Patchwork-Id: 11300021 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 6C26B921 for ; Wed, 18 Dec 2019 09:17:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4055924676 for ; Wed, 18 Dec 2019 09:17:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="ITpYjPBR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726920AbfLRJRU (ORCPT ); Wed, 18 Dec 2019 04:17:20 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:19133 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725799AbfLRJRU (ORCPT ); Wed, 18 Dec 2019 04:17:20 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Wed, 18 Dec 2019 01:17:09 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Wed, 18 Dec 2019 01:17:19 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Wed, 18 Dec 2019 01:17:19 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 18 Dec 2019 09:17:18 +0000 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 18 Dec 2019 09:17:18 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Wed, 18 Dec 2019 09:17:18 +0000 Received: from nkristam-ubuntu.nvidia.com (Not Verified[10.19.64.167]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Wed, 18 Dec 2019 01:17:17 -0800 From: Nagarjuna Kristam To: , , , , , , CC: , , , , "Nagarjuna Kristam" Subject: [Patch V2 07/18] phy: tegra: xusb: Add set_mode support for utmi phy on Tegra186 Date: Wed, 18 Dec 2019 14:46:20 +0530 Message-ID: <1576660591-10383-8-git-send-email-nkristam@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1576660591-10383-1-git-send-email-nkristam@nvidia.com> References: <1576660591-10383-1-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=1576660629; bh=yyXOBeUaQn1J7HjediW4VO2ma/Hi95SrMizsQuwodU4=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=ITpYjPBRB5z7++gGIUkUAZKGJYQS5EdEyIa62MFC/q50Oscgj8rHoEtFRTIO/Tf/R EHCn84fo9RuP3jyuTOBtkIazmwLPmxrpIeNSxZaA/+AFWsSvZc0wE2lD+FqxX1BMY5 h9lQnwRrDEwNxIveTFR/Ecpi24zGXUXzF1hhxJ8tGRIhq/tb5gm9Rt659ecS7BKdcn 2x1AOh/M/MaxRfzkcv9ttE+dFPq+MTVknwuPklRNO/KilPsFBLxJlfCfbQbQhdQRv2 nQ5RxbEF03kXdcsTieykm69oAOWPjEfyLUFT7f79GGDV2lOp+w2Q0QVVYEcUpJYl9h byPQKHkt7t+QQ== 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 utmi phy. This allow XUSB host/device mode drivers to configure the hardware to corresponding modes. Signed-off-by: Nagarjuna Kristam --- V2: - No changes in this version --- drivers/phy/tegra/xusb-tegra186.c | 109 ++++++++++++++++++++++++++++++-------- 1 file changed, 87 insertions(+), 22 deletions(-) diff --git a/drivers/phy/tegra/xusb-tegra186.c b/drivers/phy/tegra/xusb-tegra186.c index 84c2739..9a45160 100644 --- a/drivers/phy/tegra/xusb-tegra186.c +++ b/drivers/phy/tegra/xusb-tegra186.c @@ -301,6 +301,92 @@ static void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy) tegra186_utmi_bias_pad_power_off(padctl); } +static int tegra186_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, USB2_VBUS_ID); + + if (status) { + value |= VBUS_OVERRIDE; + value &= ~ID_OVERRIDE(~0); + value |= ID_OVERRIDE_FLOATING; + } else { + value &= ~VBUS_OVERRIDE; + } + + padctl_writel(padctl, value, USB2_VBUS_ID); + + return 0; +} + +static int tegra186_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, USB2_VBUS_ID); + + if (status) { + if (value & VBUS_OVERRIDE) { + value &= ~VBUS_OVERRIDE; + padctl_writel(padctl, value, USB2_VBUS_ID); + usleep_range(1000, 2000); + + value = padctl_readl(padctl, USB2_VBUS_ID); + } + + value &= ~ID_OVERRIDE(~0); + value |= ID_OVERRIDE_GROUNDED; + } else { + value &= ~ID_OVERRIDE(~0); + value |= ID_OVERRIDE_FLOATING; + } + + padctl_writel(padctl, value, USB2_VBUS_ID); + + return 0; +} + +static int tegra186_utmi_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) { + tegra186_xusb_padctl_id_override(padctl, true); + + err = regulator_enable(port->supply); + } else if (submode == USB_ROLE_DEVICE) { + tegra186_xusb_padctl_vbus_override(padctl, true); + } else if (submode == USB_ROLE_NONE) { + if (regulator_is_enabled(port->supply)) + regulator_disable(port->supply); + + tegra186_xusb_padctl_id_override(padctl, false); + tegra186_xusb_padctl_vbus_override(padctl, false); + } + } + + mutex_unlock(&padctl->lock); + + return err; +} + static int tegra186_utmi_phy_power_on(struct phy *phy) { struct tegra_xusb_lane *lane = phy_get_drvdata(phy); @@ -439,6 +525,7 @@ static const struct phy_ops utmi_phy_ops = { .exit = tegra186_utmi_phy_exit, .power_on = tegra186_utmi_phy_power_on, .power_off = tegra186_utmi_phy_power_off, + .set_mode = tegra186_utmi_phy_set_mode, .owner = THIS_MODULE, }; @@ -857,28 +944,6 @@ static void tegra186_xusb_padctl_remove(struct tegra_xusb_padctl *padctl) { } -static int tegra186_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, USB2_VBUS_ID); - - if (status) { - value |= VBUS_OVERRIDE; - value &= ~ID_OVERRIDE(~0); - value |= ID_OVERRIDE_FLOATING; - } else { - value &= ~VBUS_OVERRIDE; - } - - padctl_writel(padctl, value, USB2_VBUS_ID); - - return 0; -} - static const struct tegra_xusb_padctl_ops tegra186_xusb_padctl_ops = { .probe = tegra186_xusb_padctl_probe, .remove = tegra186_xusb_padctl_remove,