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path: root/drivers/usb/dwc3/gadget.c
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Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
-rw-r--r--drivers/usb/dwc3/gadget.c83
1 files changed, 77 insertions, 6 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 70715eeededd..9d64dd02c57e 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -298,11 +298,76 @@ static const char *dwc3_gadget_ep_cmd_string(u8 cmd)
}
}
+static const char *dwc3_gadget_generic_cmd_string(u8 cmd)
+{
+ switch (cmd) {
+ case DWC3_DGCMD_SET_LMP:
+ return "Set LMP";
+ case DWC3_DGCMD_SET_PERIODIC_PAR:
+ return "Set Periodic Parameters";
+ case DWC3_DGCMD_XMIT_FUNCTION:
+ return "Transmit Function Wake Device Notification";
+ case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO:
+ return "Set Scratchpad Buffer Array Address Lo";
+ case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI:
+ return "Set Scratchpad Buffer Array Address Hi";
+ case DWC3_DGCMD_SELECTED_FIFO_FLUSH:
+ return "Selected FIFO Flush";
+ case DWC3_DGCMD_ALL_FIFO_FLUSH:
+ return "All FIFO Flush";
+ case DWC3_DGCMD_SET_ENDPOINT_NRDY:
+ return "Set Endpoint NRDY";
+ case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK:
+ return "Run SoC Bus Loopback Test";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+static const char *dwc3_gadget_link_string(enum dwc3_link_state link_state)
+{
+ switch (link_state) {
+ case DWC3_LINK_STATE_U0:
+ return "U0";
+ case DWC3_LINK_STATE_U1:
+ return "U1";
+ case DWC3_LINK_STATE_U2:
+ return "U2";
+ case DWC3_LINK_STATE_U3:
+ return "U3";
+ case DWC3_LINK_STATE_SS_DIS:
+ return "SS.Disabled";
+ case DWC3_LINK_STATE_RX_DET:
+ return "RX.Detect";
+ case DWC3_LINK_STATE_SS_INACT:
+ return "SS.Inactive";
+ case DWC3_LINK_STATE_POLL:
+ return "Polling";
+ case DWC3_LINK_STATE_RECOV:
+ return "Recovery";
+ case DWC3_LINK_STATE_HRESET:
+ return "Hot Reset";
+ case DWC3_LINK_STATE_CMPLY:
+ return "Compliance";
+ case DWC3_LINK_STATE_LPBK:
+ return "Loopback";
+ case DWC3_LINK_STATE_RESET:
+ return "Reset";
+ case DWC3_LINK_STATE_RESUME:
+ return "Resume";
+ default:
+ return "UNKNOWN link state\n";
+ }
+}
+
int dwc3_send_gadget_generic_command(struct dwc3 *dwc, int cmd, u32 param)
{
u32 timeout = 500;
u32 reg;
+ dev_vdbg(dwc->dev, "generic cmd '%s' [%d] param %08x\n",
+ dwc3_gadget_generic_cmd_string(cmd), cmd, param);
+
dwc3_writel(dwc->regs, DWC3_DGCMDPAR, param);
dwc3_writel(dwc->regs, DWC3_DGCMD, cmd | DWC3_DGCMD_CMDACT);
@@ -332,9 +397,9 @@ int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
u32 timeout = 500;
u32 reg;
- dev_vdbg(dwc->dev, "%s: cmd '%s' params %08x %08x %08x\n",
+ dev_vdbg(dwc->dev, "%s: cmd '%s' [%d] params %08x %08x %08x\n",
dep->name,
- dwc3_gadget_ep_cmd_string(cmd), params->param0,
+ dwc3_gadget_ep_cmd_string(cmd), cmd, params->param0,
params->param1, params->param2);
dwc3_writel(dwc->regs, DWC3_DEPCMDPAR0(ep), params->param0);
@@ -515,7 +580,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
{
struct dwc3 *dwc = dep->dwc;
u32 reg;
- int ret = -ENOMEM;
+ int ret;
dev_vdbg(dwc->dev, "Enabling %s\n", dep->name);
@@ -604,6 +669,10 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
dwc3_remove_requests(dwc, dep);
+ /* make sure HW endpoint isn't stalled */
+ if (dep->flags & DWC3_EP_STALL)
+ __dwc3_gadget_ep_set_halt(dep, 0);
+
reg = dwc3_readl(dwc->regs, DWC3_DALEPENA);
reg &= ~DWC3_DALEPENA_EP(dep->number);
dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
@@ -2441,8 +2510,6 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
}
}
- dwc->link_state = next;
-
switch (next) {
case DWC3_LINK_STATE_U1:
if (dwc->speed == USB_SPEED_SUPER)
@@ -2460,7 +2527,11 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
break;
}
- dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state);
+ dev_vdbg(dwc->dev, "link change: %s [%d] -> %s [%d]\n",
+ dwc3_gadget_link_string(dwc->link_state),
+ dwc->link_state, dwc3_gadget_link_string(next), next);
+
+ dwc->link_state = next;
}
static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc,