Commit fb67afca authored by Huang Rui's avatar Huang Rui Committed by Felipe Balbi
Browse files

usb: dwc3: add lfps filter quirk 



This patch adds LFPS filter quirk, 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 41c06ffd

Documentation/devicetree/bindings/usb/dwc3.txt

+1 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ Optional properties: 
			amount of 8B10B errors occur.

 - 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.



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
@@ -386,6 +386,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc) 
	if (dwc->del_phy_power_chg_quirk)

		reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;



	if (dwc->lfps_filter_quirk)

		reg |= DWC3_GUSB3PIPECTL_LFPSFILT;



	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);



	mdelay(100);
@@ -771,6 +774,8 @@ static int dwc3_probe(struct platform_device *pdev) 
				"snps,del_p1p2p3_quirk");

		dwc->del_phy_power_chg_quirk = of_property_read_bool(node,

				"snps,del_phy_power_chg_quirk");

		dwc->lfps_filter_quirk = of_property_read_bool(node,

				"snps,lfps_filter_quirk");

	} else if (pdata) {

		dwc->maximum_speed = pdata->maximum_speed;

		dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@@ -786,6 +791,7 @@ static int dwc3_probe(struct platform_device *pdev) 
		dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;

		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;

	}



	/* default to superspeed if no maximum_speed passed */

drivers/usb/dwc3/core.h

+3 −0
Original line number Diff line number Diff line
@@ -183,6 +183,7 @@ 
#define DWC3_GUSB3PIPECTL_DEP1P2P3_EN	DWC3_GUSB3PIPECTL_DEP1P2P3(1)

#define DWC3_GUSB3PIPECTL_DEPOCHANGE	(1 << 18)

#define DWC3_GUSB3PIPECTL_SUSPHY	(1 << 17)

#define DWC3_GUSB3PIPECTL_LFPSFILT	(1 << 9)



/* Global TX Fifo Size Register */

#define DWC3_GTXFIFOSIZ_TXFDEF(n)	((n) & 0xffff)
@@ -691,6 +692,7 @@ struct dwc3_scratchpad_array { 
 * @req_p1p2p3_quirk: set if we enable request p1p2p3 quirk

 * @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

 */

struct dwc3 {

	struct usb_ctrlrequest	*ctrl_req;
@@ -804,6 +806,7 @@ struct dwc3 { 
	unsigned		req_p1p2p3_quirk:1;

	unsigned                del_p1p2p3_quirk:1;

	unsigned		del_phy_power_chg_quirk:1;

	unsigned		lfps_filter_quirk:1;

};



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

drivers/usb/dwc3/platform_data.h

+1 −0
Original line number Diff line number Diff line
@@ -34,4 +34,5 @@ struct dwc3_platform_data { 
	unsigned req_p1p2p3_quirk:1;

	unsigned del_p1p2p3_quirk:1;

	unsigned del_phy_power_chg_quirk:1;

	unsigned lfps_filter_quirk:1;

};

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