From patchwork Thu Aug 29 10:42:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saranya Gopal X-Patchwork-Id: 11121005 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 4B79D14E5 for ; Thu, 29 Aug 2019 10:56:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2A48A233FF for ; Thu, 29 Aug 2019 10:56:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726723AbfH2K4K (ORCPT ); Thu, 29 Aug 2019 06:56:10 -0400 Received: from mga03.intel.com ([134.134.136.65]:37163 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725782AbfH2K4K (ORCPT ); Thu, 29 Aug 2019 06:56:10 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Aug 2019 03:56:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,442,1559545200"; d="scan'208";a="183439889" Received: from saranya-h97m-d3h.iind.intel.com ([10.66.247.130]) by orsmga003.jf.intel.com with ESMTP; 29 Aug 2019 03:56:07 -0700 From: Saranya Gopal To: hdegoede@redhat.com, heikki.krogerus@linux.intel.com Cc: gregkh@linuxfoundation.org, mathias.nyman@intel.com, linux-usb@vger.kernel.org, Saranya Gopal , Balaji Manoharan Subject: [PATCH v4 1/2] xhci-ext-caps.c: Add property to disable Intel SW switch Date: Thu, 29 Aug 2019 16:12:06 +0530 Message-Id: <1567075327-24016-1-git-send-email-saranya.gopal@intel.com> X-Mailer: git-send-email 1.9.1 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org In platforms like Cherrytrail, 'SW switch enable' bit should not be enabled for role switch. This patch adds a property to Intel USB Role Switch platform driver to denote that SW switch should be disabled in Cherrytrail devices. Signed-off-by: Saranya Gopal Signed-off-by: Balaji Manoharan Suggested-by: Heikki Krogerus Reviewed-by: Heikki Krogerus --- changes since v3: none changes since v2: Added suggested-by tag changes since v1: none drivers/usb/host/xhci-ext-caps.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/usb/host/xhci-ext-caps.c b/drivers/usb/host/xhci-ext-caps.c index 399113f..f498160 100644 --- a/drivers/usb/host/xhci-ext-caps.c +++ b/drivers/usb/host/xhci-ext-caps.c @@ -6,11 +6,20 @@ */ #include +#include +#include #include "xhci.h" #define USB_SW_DRV_NAME "intel_xhci_usb_sw" #define USB_SW_RESOURCE_SIZE 0x400 +#define PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI 0x22b5 + +static const struct property_entry role_switch_props[] = { + PROPERTY_ENTRY_BOOL("sw_switch_disable"), + {}, +}; + static void xhci_intel_unregister_pdev(void *arg) { platform_device_unregister(arg); @@ -21,6 +30,7 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset) struct usb_hcd *hcd = xhci_to_hcd(xhci); struct device *dev = hcd->self.controller; struct platform_device *pdev; + struct pci_dev *pci = to_pci_dev(dev); struct resource res = { 0, }; int ret; @@ -43,6 +53,14 @@ static int xhci_create_intel_xhci_sw_pdev(struct xhci_hcd *xhci, u32 cap_offset) return ret; } + if (pci->device == PCI_DEVICE_ID_INTEL_CHERRYVIEW_XHCI) { + ret = platform_device_add_properties(pdev, role_switch_props); + if (ret) { + dev_err(dev, "failed to register device properties\n"); + return ret; + } + } + pdev->dev.parent = dev; ret = platform_device_add(pdev); From patchwork Thu Aug 29 10:42:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saranya Gopal X-Patchwork-Id: 11121007 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 8E52114DE for ; Thu, 29 Aug 2019 10:56:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 777B52053B for ; Thu, 29 Aug 2019 10:56:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727697AbfH2K4R (ORCPT ); Thu, 29 Aug 2019 06:56:17 -0400 Received: from mga04.intel.com ([192.55.52.120]:28731 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726983AbfH2K4R (ORCPT ); Thu, 29 Aug 2019 06:56:17 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Aug 2019 03:56:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,442,1559545200"; d="scan'208";a="183439906" Received: from saranya-h97m-d3h.iind.intel.com ([10.66.247.130]) by orsmga003.jf.intel.com with ESMTP; 29 Aug 2019 03:56:14 -0700 From: Saranya Gopal To: hdegoede@redhat.com, heikki.krogerus@linux.intel.com Cc: gregkh@linuxfoundation.org, mathias.nyman@intel.com, linux-usb@vger.kernel.org, Saranya Gopal , Balaji Manoharan Subject: [PATCH v4 2/2] usb: roles: intel: Enable static DRD mode for role switch Date: Thu, 29 Aug 2019 16:12:07 +0530 Message-Id: <1567075327-24016-2-git-send-email-saranya.gopal@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1567075327-24016-1-git-send-email-saranya.gopal@intel.com> References: <1567075327-24016-1-git-send-email-saranya.gopal@intel.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Enable static DRD mode in Intel platforms which guarantees successful role switch all the time. This fixes issues like software role switch failure after cold boot and issue with role switch when USB 3.0 cable is used. But, do not enable static DRD mode for Cherrytrail devices which rely on firmware for role switch. Signed-off-by: Saranya Gopal Signed-off-by: Balaji Manoharan Tested-by: Hans de Goede Reviewed-by: Hans de Goede Reviewed-by: Heikki Krogerus --- changes since v3: Initialized drd_config variable to fix warning changes since v2: Revised SoB tags changes since v1: Added drd_config to avoid multiple if checks Other minor changes suggested by Hans drivers/usb/roles/intel-xhci-usb-role-switch.c | 27 ++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/usb/roles/intel-xhci-usb-role-switch.c b/drivers/usb/roles/intel-xhci-usb-role-switch.c index 277de96..88d0416 100644 --- a/drivers/usb/roles/intel-xhci-usb-role-switch.c +++ b/drivers/usb/roles/intel-xhci-usb-role-switch.c @@ -19,6 +19,7 @@ #include #include #include +#include #include /* register definition */ @@ -26,6 +27,12 @@ #define SW_VBUS_VALID BIT(24) #define SW_IDPIN_EN BIT(21) #define SW_IDPIN BIT(20) +#define SW_SWITCH_EN BIT(16) + +#define DRD_CONFIG_DYNAMIC 0 +#define DRD_CONFIG_STATIC_HOST 1 +#define DRD_CONFIG_STATIC_DEVICE 2 +#define DRD_CONFIG_MASK 3 #define DUAL_ROLE_CFG1 0x6c #define HOST_MODE BIT(29) @@ -37,6 +44,7 @@ struct intel_xhci_usb_data { struct usb_role_switch *role_sw; void __iomem *base; + bool enable_sw_switch; }; static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) @@ -45,6 +53,7 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) unsigned long timeout; acpi_status status; u32 glk, val; + u32 drd_config = DRD_CONFIG_DYNAMIC; /* * On many CHT devices ACPI event (_AEI) handlers read / modify / @@ -59,24 +68,35 @@ static int intel_xhci_usb_set_role(struct device *dev, enum usb_role role) pm_runtime_get_sync(dev); - /* Set idpin value as requested */ + /* + * Set idpin value as requested. + * Since some devices rely on firmware setting DRD_CONFIG and + * SW_SWITCH_EN bits to be zero for role switch, + * do not set these bits for those devices. + */ val = readl(data->base + DUAL_ROLE_CFG0); switch (role) { case USB_ROLE_NONE: val |= SW_IDPIN; val &= ~SW_VBUS_VALID; + drd_config = DRD_CONFIG_DYNAMIC; break; case USB_ROLE_HOST: val &= ~SW_IDPIN; val &= ~SW_VBUS_VALID; + drd_config = DRD_CONFIG_STATIC_HOST; break; case USB_ROLE_DEVICE: val |= SW_IDPIN; val |= SW_VBUS_VALID; + drd_config = DRD_CONFIG_STATIC_DEVICE; break; } val |= SW_IDPIN_EN; - + if (data->enable_sw_switch) { + val &= ~DRD_CONFIG_MASK; + val |= SW_SWITCH_EN | drd_config; + } writel(val, data->base + DUAL_ROLE_CFG0); acpi_release_global_lock(glk); @@ -147,6 +167,9 @@ static int intel_xhci_usb_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); + data->enable_sw_switch = !device_property_read_bool(dev, + "sw_switch_disable"); + data->role_sw = usb_role_switch_register(dev, &sw_desc); if (IS_ERR(data->role_sw)) return PTR_ERR(data->role_sw);