@@ -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 */
@@ -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;
};
/* -------------------------------------------------------------------------- */
@@ -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;
};
This patch adds u2exit lfps quirk, and some special platforms can configure that if it is needed. Signed-off-by: Huang Rui <ray.huang@amd.com> --- drivers/usb/dwc3/core.c | 6 ++++++ drivers/usb/dwc3/core.h | 3 +++ drivers/usb/dwc3/platform_data.h | 1 + 3 files changed, 10 insertions(+)