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usb: dwc3: gadget: implement Global Command support

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This will be used by the ep0 layer for implementing
Set SEL Standard Request.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi
2012-04-24 16:19:11 +03:00
parent 93c309ded1
commit b09bb64239
3 changed files with 32 additions and 2 deletions
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27
drivers/usb/dwc3/gadget.c
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@@ -276,6 +276,33 @@ static const char *dwc3_gadget_ep_cmd_string(u8 cmd)
}
}
int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param)
{
u32 timeout = 500;
u32 reg;
dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);
dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);
do {
reg = dwc3_readl(dwc->regs, DWC3_DGCMD);
if (!(reg & DWC3_DGCMD_CMDACT)) {
dev_vdbg(dwc->dev, "Command Complete --> %d\n",
DWC3_DGCMD_STATUS(reg));
return 0;
}
/*
* We can't sleep here, because it's also called from
* interrupt context.
*/
timeout--;
if (!timeout)
return -ETIMEDOUT;
udelay(1);
} while (1);
}
int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
{