usb: dwc3: gadget: implement Global Command support
This will be used by the ep0 layer for implementing Set SEL Standard Request. Signed-off-by: Felipe Balbi <balbi@ti.com>
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3 changed files with 32 additions and 2 deletions
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@ -284,12 +284,14 @@
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#define DWC3_DGCMD_SET_ENDPOINT_NRDY 0x0c
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#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK 0x10
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#define DWC3_DGCMD_STATUS(n) (((n) >> 15) & 1)
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#define DWC3_DGCMD_CMDACT (1 << 10)
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/* Device Endpoint Command Register */
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#define DWC3_DEPCMD_PARAM_SHIFT 16
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#define DWC3_DEPCMD_PARAM(x) ((x) << DWC3_DEPCMD_PARAM_SHIFT)
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#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
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#define DWC3_DEPCMD_STATUS_MASK (0x0f << 12)
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#define DWC3_DEPCMD_STATUS(x) (((x) & DWC3_DEPCMD_STATUS_MASK) >> 12)
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#define DWC3_DEPCMD_STATUS(x) (((x) >> 15) & 1)
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#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11)
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#define DWC3_DEPCMD_CMDACT (1 << 10)
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#define DWC3_DEPCMD_CMDIOC (1 << 8)
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@ -276,6 +276,33 @@ static const char *dwc3_gadget_ep_cmd_string(u8 cmd)
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}
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}
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int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param)
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{
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u32 timeout = 500;
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u32 reg;
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dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);
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dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);
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do {
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reg = dwc3_readl(dwc->regs, DWC3_DGCMD);
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if (!(reg & DWC3_DGCMD_CMDACT)) {
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dev_vdbg(dwc->dev, "Command Complete --> %d\n",
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DWC3_DGCMD_STATUS(reg));
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return 0;
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}
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/*
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* We can't sleep here, because it's also called from
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* interrupt context.
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*/
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timeout--;
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if (!timeout)
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return -ETIMEDOUT;
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udelay(1);
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} while (1);
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}
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int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
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unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
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{
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@ -111,6 +111,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
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int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);
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int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
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unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
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int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param);
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/**
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* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
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