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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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23
drivers/usb/dwc3/core.c
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@@ -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 */