From patchwork Mon Feb 10 08:11:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nagarjuna Kristam X-Patchwork-Id: 11372677 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 436EE14B4 for ; Mon, 10 Feb 2020 08:12:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C0EA2080C for ; Mon, 10 Feb 2020 08:12:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="YT/PO7ai" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727655AbgBJIMj (ORCPT ); Mon, 10 Feb 2020 03:12:39 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:8845 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727646AbgBJIMi (ORCPT ); Mon, 10 Feb 2020 03:12:38 -0500 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 10 Feb 2020 00:12:10 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Mon, 10 Feb 2020 00:12:37 -0800 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Mon, 10 Feb 2020 00:12:37 -0800 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 10 Feb 2020 08:12:36 +0000 Received: from hqnvemgw03.nvidia.com (10.124.88.68) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 10 Feb 2020 08:12:36 +0000 Received: from nkristam-ubuntu.nvidia.com (Not Verified[10.19.67.128]) by hqnvemgw03.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 10 Feb 2020 00:12:36 -0800 From: Nagarjuna Kristam To: , , , , , , CC: , , , , Nagarjuna Kristam Subject: [Patch V5 04/21] phy: tegra: xusb: Add usb-phy support Date: Mon, 10 Feb 2020 13:41:30 +0530 Message-ID: <1581322307-11140-5-git-send-email-nkristam@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1581322307-11140-1-git-send-email-nkristam@nvidia.com> References: <1581322307-11140-1-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=1581322330; bh=RDr+f4VWDdPuVBNBVCOfEX4NxvDpI3sfd78jG4l5fGU=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=YT/PO7aisR6GHUc1Rf5jttL9AcnBdKXkDSS4lNS6IVnIhmsrYrgudNU//F8pZ9tG9 PaSQSC2lydXVPt72sI0S+C1I8JZPlulFzCqWbg6tOMyZcdXhw9034Q10jJSy1R0JGX 3rLYqlE1YQfyZTXGSapp2Q7DUxNMsqfAegrTS826qRxUsM7zy2yRr8JoAxzE2jxclO NCuSMqBS9qU7lHGz4b2E88hOPBy/y5064KVxtb3Mu+LI7imx4pbHWLelM4iprjorYn jq7GqwDG1aOYQk9sjoJhpAlj7r5B96qtN4X8TwlWdNdFijExs2WBBMPTogHAaZ+Jvw zIhkL4SsDr20A== Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org For USB 2 ports that has usb-role-switch enabled, add usb-phy for corresponding USB 2 phy. USB role changes from role switch are then updated to corresponding host and device mode drivers via usb-phy notifier block. Signed-off-by: Nagarjuna Kristam Acked-by: Thierry Reding --- V5: - No changes. --- V4: - Addressed nit comments from Thierry. - usb_phy_event is set accoring to received usb_role. - Added Acked-by info. V3: - Updated arguments and variable allignments as per Thierry inputs. --- V2: - Added dev_set_drvdata for port->dev. --- drivers/phy/tegra/xusb.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/phy/tegra/xusb.h | 2 ++ 2 files changed, 86 insertions(+) diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c index 0fdbaa2..2c0e29c 100644 --- a/drivers/phy/tegra/xusb.c +++ b/drivers/phy/tegra/xusb.c @@ -532,6 +532,8 @@ static int tegra_xusb_port_init(struct tegra_xusb_port *port, if (err < 0) goto unregister; + dev_set_drvdata(&port->dev, port); + return 0; unregister: @@ -544,6 +546,8 @@ static void tegra_xusb_port_unregister(struct tegra_xusb_port *port) if (!IS_ERR_OR_NULL(port->usb_role_sw)) { of_platform_depopulate(&port->dev); usb_role_switch_unregister(port->usb_role_sw); + cancel_work_sync(&port->usb_phy_work); + usb_remove_phy(&port->usb_phy); } device_unregister(&port->dev); @@ -562,15 +566,70 @@ static const char * const usb_roles[] = { [USB_ROLE_DEVICE] = "device", }; +static enum usb_phy_events to_usb_phy_event(enum usb_role role) +{ + switch (role) { + case USB_ROLE_DEVICE: return USB_EVENT_VBUS; + case USB_ROLE_HOST: return USB_EVENT_ID; + default: return USB_EVENT_NONE; + } +} + +static void tegra_xusb_usb_phy_work(struct work_struct *work) +{ + struct tegra_xusb_port *port = container_of(work, + struct tegra_xusb_port, + usb_phy_work); + enum usb_role role = usb_role_switch_get_role(port->usb_role_sw); + + usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role)); + + dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__, + usb_roles[role]); + + atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy); +} + static int tegra_xusb_role_sw_set(struct device *dev, enum usb_role role) { + struct tegra_xusb_port *port = dev_get_drvdata(dev); + dev_dbg(dev, "%s(): role %s\n", __func__, usb_roles[role]); + schedule_work(&port->usb_phy_work); + + return 0; +} + +static int tegra_xusb_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct tegra_xusb_port *port = container_of(otg->usb_phy, + struct tegra_xusb_port, + usb_phy); + + if (gadget != NULL) + schedule_work(&port->usb_phy_work); + return 0; } +static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct tegra_xusb_port *port = container_of(otg->usb_phy, + struct tegra_xusb_port, + usb_phy); + + if (host != NULL) + schedule_work(&port->usb_phy_work); + + return 0; +} + + static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) { + struct tegra_xusb_lane *lane; struct usb_role_switch_desc role_sx_desc = { .fwnode = dev_fwnode(&port->dev), .set = tegra_xusb_role_sw_set, @@ -597,6 +656,31 @@ static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) return err; } + INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work); + + port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg), + GFP_KERNEL); + if (!port->usb_phy.otg) + return -ENOMEM; + + lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index); + + /* + * Assign phy dev to usb-phy dev. Host/device drivers can use phy + * reference to retrieve usb-phy details. + */ + port->usb_phy.dev = &lane->pad->lanes[port->index]->dev; + port->usb_phy.dev->driver = port->padctl->dev->driver; + port->usb_phy.otg->usb_phy = &port->usb_phy; + port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral; + port->usb_phy.otg->set_host = tegra_xusb_set_host; + + err = usb_add_phy_dev(&port->usb_phy); + if (err < 0) { + dev_err(&port->dev, "Failed to add USB PHY: %d\n", err); + return err; + } + /* populate connector entry */ of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev); diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h index 9f27899..2345657 100644 --- a/drivers/phy/tegra/xusb.h +++ b/drivers/phy/tegra/xusb.h @@ -268,6 +268,8 @@ struct tegra_xusb_port { struct device dev; struct usb_role_switch *usb_role_sw; + struct work_struct usb_phy_work; + struct usb_phy usb_phy; const struct tegra_xusb_port_ops *ops; };