This patch adds P3 in U2 SS inactive quirk, and some special platforms can
configure that if it is needed.
Signed-off-by: Huang Rui <ray.hu...@amd.com>
---
drivers/usb/dwc3/core.c | 23 +++++++++++++++++++++++
drivers/usb/dwc3/core.h | 3 +++
drivers/usb/dwc3/platform_data.h | 1 +
3 files changed, 27 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 6abf4e9..ccc54df 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -365,6 +365,24 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc)
}
/**
+ * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
+ * @dwc: Pointer to our controller context structure
+ */
+static void dwc3_phy_setup(struct dwc3 *dwc)
+{
+ u32 reg;
+
+ reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+
+ if (dwc->u2ss_inp3_quirk)
+ reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
+
+ dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+
+ mdelay(100);
+}
+
+/**
* dwc3_core_init - Low-level initialization of DWC3 Core
* @dwc: Pointer to our controller context structure
*
@@ -484,6 +502,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+ dwc3_phy_setup(dwc);
+
ret = dwc3_alloc_scratch_buffers(dwc);
if (ret)
goto err1;
@@ -729,6 +749,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,disable_scramble_quirk");
dwc->u2exit_lfps_quirk = of_property_read_bool(node,
"snps,u2exit_lfps_quirk");
+ dwc->u2ss_inp3_quirk = of_property_read_bool(node,
+ "snps,u2ss_inp3_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@@ -740,6 +762,7 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk;
+ dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
}
/* default to superspeed if no maximum_speed passed */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 03e0505..f230668 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -176,6 +176,7 @@
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
+#define DWC3_GUSB3PIPECTL_U2SSINP3OK (1 << 29)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
@@ -681,6 +682,7 @@ struct dwc3_scratchpad_array {
* @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
+ * @u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@@ -790,6 +792,7 @@ struct dwc3 {
unsigned disable_scramble_quirk:1;
unsigned u2exit_lfps_quirk:1;
+ unsigned u2ss_inp3_quirk:1;
};
/* --------------------------------------------------------------------------
*/
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index 4e91e09..b5906a3 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -29,4 +29,5 @@ struct dwc3_platform_data {
unsigned has_lpm_erratum:1;
unsigned lpm_nyet_thres:4;
unsigned u2exit_lfps_quirk:1;
+ unsigned u2ss_inp3_quirk:1;
};
--
1.9.1
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