usb: dwc3: add rx_detect to polling lfps quirk
This patch adds RX_DETECT to Polling.LFPS control quirk, and some special
platforms can configure that if it is needed.
[ balbi@ti.com : added DeviceTree binding documentation ]
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index 4edd29a..1ecc333 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -27,6 +27,8 @@
- snps,del_phy_power_chg_quirk: when set core will delay PHY power change
from P0 to P1/P2/P3.
- snps,lfps_filter_quirk: when set core will filter LFPS reception.
+ - snps,rx_detect_poll_quirk: when set core will disable a 400us delay to start
+ Polling LFPS after RX.Detect.
This is usually a subnode to DWC3 glue to which it is connected.
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 29a7da0..b440b2b 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -389,6 +389,9 @@
if (dwc->lfps_filter_quirk)
reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
+ if (dwc->rx_detect_poll_quirk)
+ reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
+
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
mdelay(100);
@@ -776,6 +779,8 @@
"snps,del_phy_power_chg_quirk");
dwc->lfps_filter_quirk = of_property_read_bool(node,
"snps,lfps_filter_quirk");
+ dwc->rx_detect_poll_quirk = of_property_read_bool(node,
+ "snps,rx_detect_poll_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@@ -792,6 +797,7 @@
dwc->del_p1p2p3_quirk = pdata->del_p1p2p3_quirk;
dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk;
dwc->lfps_filter_quirk = pdata->lfps_filter_quirk;
+ dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk;
}
/* default to superspeed if no maximum_speed passed */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 368d329..8953d73 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -184,6 +184,7 @@
#define DWC3_GUSB3PIPECTL_DEPOCHANGE (1 << 18)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
#define DWC3_GUSB3PIPECTL_LFPSFILT (1 << 9)
+#define DWC3_GUSB3PIPECTL_RX_DETOPOLL (1 << 8)
/* Global TX Fifo Size Register */
#define DWC3_GTXFIFOSIZ_TXFDEF(n) ((n) & 0xffff)
@@ -693,6 +694,7 @@
* @del_p1p2p3_quirk: set if we enable delay p1p2p3 quirk
* @del_phy_power_chg_quirk: set if we enable delay phy power change quirk
* @lfps_filter_quirk: set if we enable LFPS filter quirk
+ * @rx_detect_poll_quirk: set if we enable rx_detect to polling lfps quirk
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@@ -807,6 +809,7 @@
unsigned del_p1p2p3_quirk:1;
unsigned del_phy_power_chg_quirk:1;
unsigned lfps_filter_quirk:1;
+ unsigned rx_detect_poll_quirk:1;
};
/* -------------------------------------------------------------------------- */
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index dad0211..4a0f06b 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -35,4 +35,5 @@
unsigned del_p1p2p3_quirk:1;
unsigned del_phy_power_chg_quirk:1;
unsigned lfps_filter_quirk:1;
+ unsigned rx_detect_poll_quirk:1;
};