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usb: dwc3: add delay p1p2p3 quirk 

This patch adds delay P0 to 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: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Huang Rui 2014-10-28 19:54:30 +08:00 committed by Felipe Balbi
parent df31f5b3a6
commit a2a1d0f583
4 changed files with 14 additions and 0 deletions
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2
Documentation/devicetree/bindings/usb/dwc3.txt
View File

@ -22,6 +22,8 @@ Optional properties:
- 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.
- snps,del_p1p2p3_quirk: when set core will delay P1/P2/P3 until a certain
amount of 8B10B errors occur.
This is usually a subnode to DWC3 glue to which it is connected.

6
drivers/usb/dwc3/core.c
View File

@ -380,6 +380,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
if (dwc->req_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
if (dwc->del_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
mdelay(100);
@ -761,6 +764,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,u2ss_inp3_quirk");
dwc->req_p1p2p3_quirk = of_property_read_bool(node,
"snps,req_p1p2p3_quirk");
dwc->del_p1p2p3_quirk = of_property_read_bool(node,
"snps,del_p1p2p3_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@ -774,6 +779,7 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk;
dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;
dwc->del_p1p2p3_quirk = pdata->del_p1p2p3_quirk;
}
/* default to superspeed if no maximum_speed passed */

5
drivers/usb/dwc3/core.h
View File

@ -178,6 +178,9 @@
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
#define DWC3_GUSB3PIPECTL_U2SSINP3OK (1 << 29)
#define DWC3_GUSB3PIPECTL_REQP1P2P3 (1 << 24)
#define DWC3_GUSB3PIPECTL_DEP1P2P3(n) ((n) << 19)
#define DWC3_GUSB3PIPECTL_DEP1P2P3_MASK DWC3_GUSB3PIPECTL_DEP1P2P3(7)
#define DWC3_GUSB3PIPECTL_DEP1P2P3_EN DWC3_GUSB3PIPECTL_DEP1P2P3(1)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
@ -685,6 +688,7 @@ struct dwc3_scratchpad_array {
* @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
* @del_p1p2p3_quirk: set if we enable delay p1p2p3 quirk
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@ -796,6 +800,7 @@ struct dwc3 {
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
unsigned req_p1p2p3_quirk:1;
unsigned del_p1p2p3_quirk:1;
};
/* -------------------------------------------------------------------------- */

1
drivers/usb/dwc3/platform_data.h
View File

@ -32,4 +32,5 @@ struct dwc3_platform_data {
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
unsigned req_p1p2p3_quirk:1;
unsigned del_p1p2p3_quirk:1;
};