Commit df31f5b3 authored by Huang Rui's avatar Huang Rui Committed by Felipe Balbi
Browse files

usb: dwc3: add request p1p2p3 quirk 



This patch adds request P1/P2/P3 quirk for U2/U2/U3, and some special
platforms can configure that if it is needed.

[ balbi@ti.com : added DeviceTree binding documentation ]

Signed-off-by: default avatarHuang Rui <ray.huang@amd.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent b5a65c40

Documentation/devicetree/bindings/usb/dwc3.txt

+2 −0
Original line number Diff line number Diff line
@@ -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.

drivers/usb/dwc3/core.c

+6 −0
Original line number Diff line number Diff line
@@ -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);
@@ -756,6 +759,8 @@ 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;
@@ -768,6 +773,7 @@ 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 */

drivers/usb/dwc3/core.h

+3 −0
Original line number Diff line number Diff line
@@ -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 p1p2p3 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;

};



/* -------------------------------------------------------------------------- */

drivers/usb/dwc3/platform_data.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

};

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