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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: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Huang Rui 2014-10-28 19:54:29 +08:00 committed by Felipe Balbi
parent b5a65c4063
commit df31f5b3a6
4 changed files with 12 additions and 0 deletions
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2
Documentation/devicetree/bindings/usb/dwc3.txt
View File

@ -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.

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

@ -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 */

3
drivers/usb/dwc3/core.h
View File

@ -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;
};
/* -------------------------------------------------------------------------- */

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

@ -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;
};