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Commit b09bb642 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: gadget: implement Global Command support 



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

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 93c309de

drivers/usb/dwc3/core.h

+4 −2
Original line number Diff line number Diff line
@@ -284,12 +284,14 @@ 
#define DWC3_DGCMD_SET_ENDPOINT_NRDY	0x0c

#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK	0x10



#define DWC3_DGCMD_STATUS(n)		(((n) >> 15) & 1)

#define DWC3_DGCMD_CMDACT		(1 << 10)



/* Device Endpoint Command Register */

#define DWC3_DEPCMD_PARAM_SHIFT		16

#define DWC3_DEPCMD_PARAM(x)		((x) << DWC3_DEPCMD_PARAM_SHIFT)

#define DWC3_DEPCMD_GET_RSC_IDX(x)     (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)

#define DWC3_DEPCMD_STATUS_MASK		(0x0f << 12)

#define DWC3_DEPCMD_STATUS(x)		(((x) & DWC3_DEPCMD_STATUS_MASK) >> 12)

#define DWC3_DEPCMD_STATUS(x)		(((x) >> 15) & 1)

#define DWC3_DEPCMD_HIPRI_FORCERM	(1 << 11)

#define DWC3_DEPCMD_CMDACT		(1 << 10)

#define DWC3_DEPCMD_CMDIOC		(1 << 8)

drivers/usb/dwc3/gadget.c

+27 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/usb/dwc3/gadget.h

+1 −0
Original line number Diff line number Diff line
@@ -111,6 +111,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, 
int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);

int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,

		unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);

int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param);



/**

 * dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW