[PATCH v4 08/20] usb: dwc3: add request P1/P2/P3 quirk
From: Huang Rui
Date: Thu Oct 30 2014 - 06:16:50 EST
This patch adds request P1/P2/P3 quirk for U2/U2/U3, and some special
platforms can configure that if it is needed.
[ balbi@xxxxxx : added DeviceTree binding documentation ]
Signed-off-by: Huang Rui <ray.huang@xxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
Documentation/devicetree/bindings/usb/dwc3.txt | 2 ++
drivers/usb/dwc3/core.c | 6 ++++++
drivers/usb/dwc3/core.h | 3 +++
drivers/usb/dwc3/platform_data.h | 1 +
4 files changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index f714357..9de11fd 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -20,6 +20,8 @@ Optional properties:
- snps,lpm-nyet-threshold: LPM NYET threshold
- snps,u2exit_lfps_quirk: set if we want to enable U2Exit LFPS quirk
- snps,u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk
+ - snps,req_p1p2p3_quirk: when set, the core will always request for
+ P1/P2/P3 transition sequence.
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 0a935cb..e951984 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -377,6 +377,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
if (dwc->u2ss_inp3_quirk)
reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
+ if (dwc->req_p1p2p3_quirk)
+ reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
+
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
mdelay(100);
@@ -753,6 +756,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,u2exit_lfps_quirk");
dwc->u2ss_inp3_quirk = of_property_read_bool(node,
"snps,u2ss_inp3_quirk");
+ dwc->req_p1p2p3_quirk = of_property_read_bool(node,
+ "snps,req_p1p2p3_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@@ -765,6 +770,7 @@ 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;
+ dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;
}
/* default to superspeed if no maximum_speed passed */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 3843511..cbb8593 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -177,6 +177,7 @@
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
#define DWC3_GUSB3PIPECTL_U2SSINP3OK (1 << 29)
+#define DWC3_GUSB3PIPECTL_REQP1P2P3 (1 << 24)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
@@ -683,6 +684,7 @@ struct dwc3_scratchpad_array {
* @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
+ * @req_p1p2p3_quirk: set if we enable request P1/P2/P3 quirk
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@@ -793,6 +795,7 @@ struct dwc3 {
unsigned disable_scramble_quirk:1;
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
+ unsigned req_p1p2p3_quirk:1;
};
/* -------------------------------------------------------------------------- */
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index cf92c81..d3e6ec2 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -31,4 +31,5 @@ struct dwc3_platform_data {
unsigned has_lpm_erratum:1;
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
+ unsigned req_p1p2p3_quirk:1;
};
--
1.9.1
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