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usb: dwc3: add delay phy power change quirk 

This patch adds delay PHY power change from P0 to P1/P2/P3 when link state
changing from U0 to U1/U2/U3 respectively, 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 19:54:31 +08:00 committed by Felipe Balbi
parent a2a1d0f583
commit 41c06ffdf9
4 changed files with 12 additions and 0 deletions
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2
Documentation/devicetree/bindings/usb/dwc3.txt
View File

@ -24,6 +24,8 @@ Optional properties:
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.
- snps,del_phy_power_chg_quirk: when set core will delay PHY power change
from P0 to P1/P2/P3.
This is usually a subnode to DWC3 glue to which it is connected.

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

@ -383,6 +383,9 @@ static void dwc3_phy_setup(struct dwc3 *dwc)
if (dwc->del_p1p2p3_quirk)
reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
if (dwc->del_phy_power_chg_quirk)
reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
mdelay(100);
@ -766,6 +769,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,req_p1p2p3_quirk");
dwc->del_p1p2p3_quirk = of_property_read_bool(node,
"snps,del_p1p2p3_quirk");
dwc->del_phy_power_chg_quirk = of_property_read_bool(node,
"snps,del_phy_power_chg_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@ -780,6 +785,7 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
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;
}
/* default to superspeed if no maximum_speed passed */

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

@ -181,6 +181,7 @@
#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_DEPOCHANGE (1 << 18)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
@ -689,6 +690,7 @@ struct dwc3_scratchpad_array {
* @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
* @del_phy_power_chg_quirk: set if we enable delay phy power change quirk
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@ -801,6 +803,7 @@ struct dwc3 {
unsigned u2ss_inp3_quirk:1;
unsigned req_p1p2p3_quirk:1;
unsigned del_p1p2p3_quirk:1;
unsigned del_phy_power_chg_quirk:1;
};
/* -------------------------------------------------------------------------- */

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

@ -33,4 +33,5 @@ struct dwc3_platform_data {
unsigned u2ss_inp3_quirk:1;
unsigned req_p1p2p3_quirk:1;
unsigned del_p1p2p3_quirk:1;
unsigned del_phy_power_chg_quirk:1;
};