Merge tag 'usb-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v3.16 merge window

Not a lot here during this merge window. Mostly we just have
the usual miscellaneous patches (removal of unnecessary prints,
proper dependencies being added to Kconfig, build warning fixes,
new device ID, etc.

Other than those, the only important new features are the
new support for OS Strings which should help Linux Gadget
Drivers behave better under MS Windows. Also Babble Recovery
implementation for MUSB on AM335x. Lastly, we also have
ARCH_QCOM PHY support though phy-msm.

Signed-of-by: Felipe Balbi <balbi@ti.com>

Conflicts:
	drivers/usb/phy/phy-mv-u3d-usb.c

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,