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

Huang Rui
2014-10-17T08:53:37Z

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@amd.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