From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bl2on0115.outbound.protection.outlook.com ([65.55.169.115]:3098 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751647AbaJ1L4U (ORCPT ); Tue, 28 Oct 2014 07:56:20 -0400 From: Huang Rui To: Felipe Balbi , Alan Stern , "Bjorn Helgaas" , Greg Kroah-Hartman CC: Paul Zimmerman , Heikki Krogerus , Jason Chang , "Vincent Wan" , Tony Li , , , , Huang Rui Subject: [PATCH v3 06/19] usb: dwc3: add u2exit lfps quirk Date: Tue, 28 Oct 2014 19:54:27 +0800 Message-ID: <1414497280-3126-7-git-send-email-ray.huang@amd.com> In-Reply-To: <1414497280-3126-1-git-send-email-ray.huang@amd.com> References: <1414497280-3126-1-git-send-email-ray.huang@amd.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-pci-owner@vger.kernel.org List-ID: This patch adds u2exit lfps quirk, and some special platforms can configure that if it is needed. Signed-off-by: Huang Rui --- drivers/usb/dwc3/core.c | 6 ++++++ drivers/usb/dwc3/core.h | 3 +++ drivers/usb/dwc3/platform_data.h | 1 + 3 files changed, 10 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 4f37a43..6abf4e9 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -468,6 +468,9 @@ static int dwc3_core_init(struct dwc3 *dwc) else reg &= ~DWC3_GCTL_DISSCRAMBLE; + if (dwc->u2exit_lfps_quirk) + reg |= DWC3_GCTL_U2EXIT_LFPS; + /* * WORKAROUND: DWC3 revisions <1.90a have a bug * where the device can fail to connect at SuperSpeed @@ -724,6 +727,8 @@ static int dwc3_probe(struct platform_device *pdev) dwc->disable_scramble_quirk = of_property_read_bool(node, "snps,disable_scramble_quirk"); + dwc->u2exit_lfps_quirk = of_property_read_bool(node, + "snps,u2exit_lfps_quirk"); } else if (pdata) { dwc->maximum_speed = pdata->maximum_speed; dwc->has_lpm_erratum = pdata->has_lpm_erratum; @@ -734,6 +739,7 @@ static int dwc3_probe(struct platform_device *pdev) dwc->dr_mode = pdata->dr_mode; dwc->disable_scramble_quirk = pdata->disable_scramble_quirk; + dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk; } /* default to superspeed if no maximum_speed passed */ diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 19d1ecb..03e0505 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -166,6 +166,7 @@ #define DWC3_GCTL_SCALEDOWN(n) ((n) << 4) #define DWC3_GCTL_SCALEDOWN_MASK DWC3_GCTL_SCALEDOWN(3) #define DWC3_GCTL_DISSCRAMBLE (1 << 3) +#define DWC3_GCTL_U2EXIT_LFPS (1 << 2) #define DWC3_GCTL_GBLHIBERNATIONEN (1 << 1) #define DWC3_GCTL_DSBLCLKGTNG (1 << 0) @@ -679,6 +680,7 @@ struct dwc3_scratchpad_array { * @start_config_issued: true when StartConfig command has been issued * @three_stage_setup: set if we perform a three phase setup * @disable_scramble_quirk: set if we enable the disable scramble quirk + * @u2exit_lfps_quirk: set if we enable u2exit lfps quirk */ struct dwc3 { struct usb_ctrlrequest *ctrl_req; @@ -787,6 +789,7 @@ struct dwc3 { unsigned three_stage_setup:1; unsigned disable_scramble_quirk:1; + unsigned u2exit_lfps_quirk:1; }; /* -------------------------------------------------------------------------- */ diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h index 2e546ac..4e91e09 100644 --- a/drivers/usb/dwc3/platform_data.h +++ b/drivers/usb/dwc3/platform_data.h @@ -28,4 +28,5 @@ struct dwc3_platform_data { unsigned disable_scramble_quirk:1; unsigned has_lpm_erratum:1; unsigned lpm_nyet_thres:4; + unsigned u2exit_lfps_quirk:1; }; -- 1.9.1