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>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 93f9973..42641ad 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -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)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 906db57..158d396 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -276,6 +276,33 @@
}
}
+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)
{
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index a860008..95ef6a2 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -111,6 +111,7 @@
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