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usb: dwc3: ep0: add LPM handling

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On device loading the driver enables LPM and the acceptance of U1 and U2
states. The [Set|Clear]Feature requests for "U1/U2" are forwarded
directly to the hardware and allow / forbid the initiation of the low
power links.

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 2011-09-13 17:54:39 +02:00 • committed by Felipe Balbi
parent 51249dca62
commit e6a3b5e288
3 changed files with 45 additions and 11 deletions
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9
drivers/usb/dwc3/gadget.c
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@ -1933,6 +1933,7 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_TSTCTRL_MASK;
reg &= ~(DWC3_DCTL_INITU1ENA | DWC3_DCTL_INITU2ENA);
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
dwc->test_mode = false;
@ -2330,6 +2331,14 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc)
goto err5;
}
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg |= DWC3_DCFG_LPM_CAP;
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg |= DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA;
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
/* Enable all but Start and End of Frame IRQs */
reg = (DWC3_DEVTEN_VNDRDEVTSTRCVEDEN |
DWC3_DEVTEN_EVNTOVERFLOWEN |