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usb: dwc3: move generic dwc3 code from gadget into core

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A few inits like the scale value or the removal of the DISSCRAMBLE is
done in the gadget code however it touches a general register.
Move this piece to the core.c file since it is likely to be requied by
both, parts of the core (device and host).

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior 2011-10-31 22:25:41 +01:00 committed by Felipe Balbi
parent 3140e8cbfe
commit 4878a02898
2 changed files with 23 additions and 24 deletions
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23
drivers/usb/dwc3/core.c
View file

@ -349,6 +349,29 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
dwc3_cache_hwparams(dwc);
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN(3);
reg &= ~DWC3_GCTL_DISSCRAMBLE;
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
break;
default:
dev_dbg(dwc->dev, "No power optimization available\n");
}
/*
* WORKAROUND: DWC3 revisions <1.90a have a bug
* when The device fails to connect at SuperSpeed
* and falls back to high-speed mode which causes
* the device to enter in a Connect/Disconnect loop
*/
if (dwc->revision < DWC3_REVISION_190A)
reg |= DWC3_GCTL_U2RSTECN;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");

24
drivers/usb/dwc3/gadget.c
View file

@ -1155,30 +1155,6 @@ static int dwc3_gadget_start(struct usb_gadget *g,
dwc->gadget_driver = driver;
dwc->gadget.dev.driver = &driver->driver;
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_SCALEDOWN(3);
reg &= ~DWC3_GCTL_DISSCRAMBLE;
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
reg &= ~DWC3_GCTL_DSBLCLKGTNG;
break;
default:
dev_dbg(dwc->dev, "No power optimization available\n");
}
/*
* WORKAROUND: DWC3 revisions <1.90a have a bug
* when The device fails to connect at SuperSpeed
* and falls back to high-speed mode which causes
* the device to enter in a Connect/Disconnect loop
*/
if (dwc->revision < DWC3_REVISION_190A)
reg |= DWC3_GCTL_U2RSTECN;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg &= ~(DWC3_DCFG_SPEED_MASK);
reg |= dwc->maximum_speed;