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usb: dwc3: add P3 in U2 SS inactive quirk

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This patch adds P3 in U2 SS inactive quirk, 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 19:54:28 +08:00 committed by Felipe Balbi
parent 9a5b2f3167
commit b5a65c4063
4 changed files with 28 additions and 0 deletions
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1
Documentation/devicetree/bindings/usb/dwc3.txt
View File

@ -19,6 +19,7 @@ Optional properties:
- snps,has-lpm-erratum: true when DWC3 was configured with LPM Erratum enabled
- 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
This is usually a subnode to DWC3 glue to which it is connected.

23
drivers/usb/dwc3/core.c
View File

@ -364,6 +364,24 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc)
parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8);
}
/**
* dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
* @dwc: Pointer to our controller context structure
*/
static void dwc3_phy_setup(struct dwc3 *dwc)
{
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
if (dwc->u2ss_inp3_quirk)
reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
mdelay(100);
}
/**
* dwc3_core_init - Low-level initialization of DWC3 Core
* @dwc: Pointer to our controller context structure
@ -489,6 +507,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
dwc3_phy_setup(dwc);
ret = dwc3_alloc_scratch_buffers(dwc);
if (ret)
goto err1;
@ -734,6 +754,8 @@ static int dwc3_probe(struct platform_device *pdev)
"snps,disable_scramble_quirk");
dwc->u2exit_lfps_quirk = of_property_read_bool(node,
"snps,u2exit_lfps_quirk");
dwc->u2ss_inp3_quirk = of_property_read_bool(node,
"snps,u2ss_inp3_quirk");
} else if (pdata) {
dwc->maximum_speed = pdata->maximum_speed;
dwc->has_lpm_erratum = pdata->has_lpm_erratum;
@ -745,6 +767,7 @@ 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;
}
/* default to superspeed if no maximum_speed passed */

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

@ -176,6 +176,7 @@
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
#define DWC3_GUSB3PIPECTL_U2SSINP3OK (1 << 29)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
@ -681,6 +682,7 @@ struct dwc3_scratchpad_array {
* @three_stage_setup: set if we perform a three phase setup
* @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
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
@ -790,6 +792,7 @@ struct dwc3 {
unsigned disable_scramble_quirk:1;
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
};
/* -------------------------------------------------------------------------- */

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

@ -30,4 +30,5 @@ struct dwc3_platform_data {
unsigned disable_scramble_quirk:1;
unsigned has_lpm_erratum:1;
unsigned u2exit_lfps_quirk:1;
unsigned u2ss_inp3_quirk:1;
};