linux-kernel - [PATCH v2 12/16] usb: dwc3: add delay phy power change quirk

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Date:	Fri, 17 Oct 2014 16:53:37 +0800
From:	Huang Rui <ray.huang@....com>
To:	Felipe Balbi <balbi@...com>,
	Alan Stern <stern@...land.harvard.edu>,
	"Bjorn Helgaas" <bhelgaas@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Paul Zimmerman <Paul.Zimmerman@...opsys.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Vincent Wan <vincent.wan@....com>, Tony Li <tony.li@....com>,
	<linux-usb@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Huang Rui <ray.huang@....com>
Subject: [PATCH v2 12/16] usb: dwc3: add delay phy power change quirk

AMD NL needs to delay PHY power change from P0 to P1/P2/P3 when link state
changing from U0 to U1/U2/U3 respectively.

Signed-off-by: Huang Rui <ray.huang@....com>
---
 drivers/usb/dwc3/core.c          | 3 +++
 drivers/usb/dwc3/core.h          | 1 +
 drivers/usb/dwc3/dwc3-pci.c      | 3 ++-
 drivers/usb/dwc3/platform_data.h | 1 +
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index a9f1d4c..920a8ab 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -383,6 +383,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->quirks & DWC3_QUIRK_DEPP1P2P3)
 		reg |= DWC3_GUSB3PIPECTL_DEP1P2P3(1);
 
+	if (dwc->quirks & DWC3_QUIRK_DEPOCHANGE)
+		reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
+
 	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
 
 	mdelay(100);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index cf70fa6..4c0200f 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -180,6 +180,7 @@
 #define DWC3_GUSB3PIPECTL_REQP1P2P3	(1 << 24)
 #define DWC3_GUSB3PIPECTL_DEP1P2P3_MASK	DWC3_GUSB3PIPECTL_DEP1P2P3(7)
 #define DWC3_GUSB3PIPECTL_DEP1P2P3(n)	((n) << 19)
+#define DWC3_GUSB3PIPECTL_DEPOCHANGE	(1 << 18)
 #define DWC3_GUSB3PIPECTL_SUSPHY	(1 << 17)
 
 /* Global TX Fifo Size Register */
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 23ae6a7..0eb8b2a 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -153,7 +153,8 @@ static int dwc3_pci_probe(struct pci_dev *pci,
 			| DWC3_QUIRK_U2EXIT_LFPS
 			| DWC3_QUIRK_U2SSINP3OK
 			| DWC3_QUIRK_REQP1P2P3
-			| DWC3_QUIRK_DEPP1P2P3;
+			| DWC3_QUIRK_DEPP1P2P3
+			| DWC3_QUIRK_DEPOCHANGE;
 	}
 
 	ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index e668c1f..934c5e1 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -34,5 +34,6 @@ struct dwc3_platform_data {
 #define DWC3_QUIRK_U2SSINP3OK		(1 << 3)
 #define DWC3_QUIRK_REQP1P2P3		(1 << 4)
 #define DWC3_QUIRK_DEPP1P2P3		(1 << 5)
+#define DWC3_QUIRK_DEPOCHANGE		(1 << 6)
 
 };
-- 
1.9.1

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