usb: dwc3: trace: decode ctrl request

Instead of *always* dumping raw ctrl bytes, let's decode standard
requests which will make the lives of those debugging DWC3 quite a bit
easier.

Output will now look like so:

irq/34-dwc3-1594  [000] d..1   107.573081: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   107.573694: dwc3_ctrl_req: Set Address(Addr = 01)
irq/34-dwc3-1594  [000] d..1   107.588319: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   107.588816: dwc3_ctrl_req: Get Configuration Descriptor(Index = 0, Length = 9)
irq/34-dwc3-1594  [000] d..1   107.589191: dwc3_ctrl_req: Set Configuration(Config = 3)
irq/34-dwc3-1594  [000] d..1   107.589846: dwc3_ctrl_req: Get BOS Descriptor(Index = 0, Length = 5)
irq/34-dwc3-1594  [000] d..1   107.590146: dwc3_ctrl_req: Get BOS Descriptor(Index = 0, Length = 22)
irq/34-dwc3-1594  [000] d..1   107.590546: dwc3_ctrl_req: Get Configuration Descriptor(Index = 0, Length = 9)
irq/34-dwc3-1594  [000] d..1   107.590840: dwc3_ctrl_req: Get Configuration Descriptor(Index = 0, Length = 69)
irq/34-dwc3-1594  [000] d..1   107.591138: dwc3_ctrl_req: Get Configuration Descriptor(Index = 1, Length = 9)
irq/34-dwc3-1594  [000] d..1   107.591541: dwc3_ctrl_req: Get Configuration Descriptor(Index = 1, Length = 32)
irq/34-dwc3-1594  [000] d..1   107.591834: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   114.701005: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   114.721080: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   114.722709: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   114.728979: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   114.730544: dwc3_ctrl_req: Get Device Qualifier Descriptor(Index = 0, Length = 10)
irq/34-dwc3-1594  [000] d..1   115.776018: dwc3_ctrl_req: Get Configuration Descriptor(Index = 0, Length = 9)
irq/34-dwc3-1594  [000] d..1   115.776760: dwc3_ctrl_req: Set Configuration(Config = 0)
irq/34-dwc3-1594  [000] d..1   115.777676: dwc3_ctrl_req: Get Configuration(Length = 1)
irq/34-dwc3-1594  [000] d..1   115.924797: dwc3_ctrl_req: Get Device Descriptor(Index = 0, Length = 18)
irq/34-dwc3-1594  [000] d..1   115.929025: dwc3_ctrl_req: Get String Descriptor(Index = 0, Length = 500)
irq/34-dwc3-1594  [000] d..1   115.929566: dwc3_ctrl_req: Get String Descriptor(Index = 1, Length = 500)
irq/34-dwc3-1594  [000] d..1   115.930911: dwc3_ctrl_req: Get String Descriptor(Index = 0, Length = 500)
irq/34-dwc3-1594  [000] d..1   115.931528: dwc3_ctrl_req: Get String Descriptor(Index = 2, Length = 500)
irq/34-dwc3-1594  [000] d..1   115.932950: dwc3_ctrl_req: Get String Descriptor(Index = 0, Length = 500)
irq/34-dwc3-1594  [000] d..1   115.933533: dwc3_ctrl_req: Get String Descriptor(Index = 3, Length = 500)

Note that Class and Vendor requests won't be decoded for obvious
reasons. Those will be printed as a raw sequence of bytes.

This patch has been tested against a normal host (both Linux and
Windows) and USB30CV Chapter 9 tests.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 1025713..5e9c070 100644 (file)
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -222,6 +222,240 @@ dwc3_gadget_event_string(char *str, const struct dwc3_event_devt *event)
        return str;
 }
 
+static inline void dwc3_decode_get_status(__u8 t, __u16 i, __u16 l, char *str)
+{
+       switch (t & USB_RECIP_MASK) {
+       case USB_RECIP_INTERFACE:
+               sprintf(str, "Get Interface Status(Intf = %d, Length = %d)",
+                       i, l);
+               break;
+       case USB_RECIP_ENDPOINT:
+               sprintf(str, "Get Endpoint Status(ep%d%s)",
+                       i & ~USB_DIR_IN,
+                       i & USB_DIR_IN ? "in" : "out");
+               break;
+       }
+}
+
+static inline void dwc3_decode_set_clear_feature(__u8 t, __u8 b, __u16 v,
+                                                __u16 i, char *str)
+{
+       switch (t & USB_RECIP_MASK) {
+       case USB_RECIP_DEVICE:
+               sprintf(str, "%s Device Feature(%s%s)",
+                       b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+                       ({char *s;
+                               switch (v) {
+                               case USB_DEVICE_SELF_POWERED:
+                                       s = "Self Powered";
+                                       break;
+                               case USB_DEVICE_REMOTE_WAKEUP:
+                                       s = "Remote Wakeup";
+                                       break;
+                               case USB_DEVICE_TEST_MODE:
+                                       s = "Test Mode";
+                                       break;
+                               default:
+                                       s = "UNKNOWN";
+                               } s; }),
+                       v == USB_DEVICE_TEST_MODE ?
+                       ({ char *s;
+                               switch (i) {
+                               case TEST_J:
+                                       s = ": TEST_J";
+                                       break;
+                               case TEST_K:
+                                       s = ": TEST_K";
+                                       break;
+                               case TEST_SE0_NAK:
+                                       s = ": TEST_SE0_NAK";
+                                       break;
+                               case TEST_PACKET:
+                                       s = ": TEST_PACKET";
+                                       break;
+                               case TEST_FORCE_EN:
+                                       s = ": TEST_FORCE_EN";
+                                       break;
+                               default:
+                                       s = ": UNKNOWN";
+                               } s; }) : "");
+               break;
+       case USB_RECIP_INTERFACE:
+               sprintf(str, "%s Interface Feature(%s)",
+                       b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+                       v == USB_INTRF_FUNC_SUSPEND ?
+                       "Function Suspend" : "UNKNOWN");
+               break;
+       case USB_RECIP_ENDPOINT:
+               sprintf(str, "%s Endpoint Feature(%s ep%d%s)",
+                       b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
+                       v == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN",
+                       i & ~USB_DIR_IN,
+                       i & USB_DIR_IN ? "in" : "out");
+               break;
+       }
+}
+
+static inline void dwc3_decode_set_address(__u16 v, char *str)
+{
+       sprintf(str, "Set Address(Addr = %02x)", v);
+}
+
+static inline void dwc3_decode_get_set_descriptor(__u8 t, __u8 b, __u16 v,
+                                                 __u16 i, __u16 l, char *str)
+{
+       sprintf(str, "%s %s Descriptor(Index = %d, Length = %d)",
+               b == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
+               ({ char *s;
+                       switch (v >> 8) {
+                       case USB_DT_DEVICE:
+                               s = "Device";
+                               break;
+                       case USB_DT_CONFIG:
+                               s = "Configuration";
+                               break;
+                       case USB_DT_STRING:
+                               s = "String";
+                               break;
+                       case USB_DT_INTERFACE:
+                               s = "Interface";
+                               break;
+                       case USB_DT_ENDPOINT:
+                               s = "Endpoint";
+                               break;
+                       case USB_DT_DEVICE_QUALIFIER:
+                               s = "Device Qualifier";
+                               break;
+                       case USB_DT_OTHER_SPEED_CONFIG:
+                               s = "Other Speed Config";
+                               break;
+                       case USB_DT_INTERFACE_POWER:
+                               s = "Interface Power";
+                               break;
+                       case USB_DT_OTG:
+                               s = "OTG";
+                               break;
+                       case USB_DT_DEBUG:
+                               s = "Debug";
+                               break;
+                       case USB_DT_INTERFACE_ASSOCIATION:
+                               s = "Interface Association";
+                               break;
+                       case USB_DT_BOS:
+                               s = "BOS";
+                               break;
+                       case USB_DT_DEVICE_CAPABILITY:
+                               s = "Device Capability";
+                               break;
+                       case USB_DT_PIPE_USAGE:
+                               s = "Pipe Usage";
+                               break;
+                       case USB_DT_SS_ENDPOINT_COMP:
+                               s = "SS Endpoint Companion";
+                               break;
+                       case USB_DT_SSP_ISOC_ENDPOINT_COMP:
+                               s = "SSP Isochronous Endpoint Companion";
+                               break;
+                       default:
+                               s = "UNKNOWN";
+                               break;
+                       } s; }), v & 0xff, l);
+}
+
+
+static inline void dwc3_decode_get_configuration(__u16 l, char *str)
+{
+       sprintf(str, "Get Configuration(Length = %d)", l);
+}
+
+static inline void dwc3_decode_set_configuration(__u8 v, char *str)
+{
+       sprintf(str, "Set Configuration(Config = %d)", v);
+}
+
+static inline void dwc3_decode_get_intf(__u16 i, __u16 l, char *str)
+{
+       sprintf(str, "Get Interface(Intf = %d, Length = %d)", i, l);
+}
+
+static inline void dwc3_decode_set_intf(__u8 v, __u16 i, char *str)
+{
+       sprintf(str, "Set Interface(Intf = %d, Alt.Setting = %d)", i, v);
+}
+
+static inline void dwc3_decode_synch_frame(__u16 i, __u16 l, char *str)
+{
+       sprintf(str, "Synch Frame(Endpoint = %d, Length = %d)", i, l);
+}
+
+static inline void dwc3_decode_set_sel(__u16 l, char *str)
+{
+       sprintf(str, "Set SEL(Length = %d)", l);
+}
+
+static inline void dwc3_decode_set_isoch_delay(__u8 v, char *str)
+{
+       sprintf(str, "Set Isochronous Delay(Delay = %d ns)", v);
+}
+
+/**
+ * dwc3_decode_ctrl - returns a string represetion of ctrl request
+ */
+static inline const char *dwc3_decode_ctrl(char *str, __u8 bRequestType,
+               __u8 bRequest, __u16 wValue, __u16 wIndex, __u16 wLength)
+{
+       switch (bRequest) {
+       case USB_REQ_GET_STATUS:
+               dwc3_decode_get_status(bRequestType, wIndex, wLength, str);
+               break;
+       case USB_REQ_CLEAR_FEATURE:
+       case USB_REQ_SET_FEATURE:
+               dwc3_decode_set_clear_feature(bRequestType, bRequest, wValue,
+                                             wIndex, str);
+               break;
+       case USB_REQ_SET_ADDRESS:
+               dwc3_decode_set_address(wValue, str);
+               break;
+       case USB_REQ_GET_DESCRIPTOR:
+       case USB_REQ_SET_DESCRIPTOR:
+               dwc3_decode_get_set_descriptor(bRequestType, bRequest, wValue,
+                                              wIndex, wLength, str);
+               break;
+       case USB_REQ_GET_CONFIGURATION:
+               dwc3_decode_get_configuration(wLength, str);
+               break;
+       case USB_REQ_SET_CONFIGURATION:
+               dwc3_decode_set_configuration(wValue, str);
+               break;
+       case USB_REQ_GET_INTERFACE:
+               dwc3_decode_get_intf(wIndex, wLength, str);
+               break;
+       case USB_REQ_SET_INTERFACE:
+               dwc3_decode_set_intf(wValue, wIndex, str);
+               break;
+       case USB_REQ_SYNCH_FRAME:
+               dwc3_decode_synch_frame(wIndex, wLength, str);
+               break;
+       case USB_REQ_SET_SEL:
+               dwc3_decode_set_sel(wLength, str);
+               break;
+       case USB_REQ_SET_ISOCH_DELAY:
+               dwc3_decode_set_isoch_delay(wValue, str);
+               break;
+       default:
+               sprintf(str, "%02x %02x %02x %02x %02x %02x %02x %02x",
+                       bRequestType, bRequest,
+                       cpu_to_le16(wValue) & 0xff,
+                       cpu_to_le16(wValue) >> 8,
+                       cpu_to_le16(wIndex) & 0xff,
+                       cpu_to_le16(wIndex) >> 8,
+                       cpu_to_le16(wLength) & 0xff,
+                       cpu_to_le16(wLength) >> 8);
+       }
+
+       return str;
+}
+
 /**
  * dwc3_ep_event_string - returns event name
  * @event: then event code

diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h
index af093b4..6504b11 100644 (file)
--- a/drivers/usb/dwc3/trace.h
+++ b/drivers/usb/dwc3/trace.h
@@ -85,6 +85,7 @@ DECLARE_EVENT_CLASS(dwc3_log_ctrl,
                __field(__u16, wValue)
                __field(__u16, wIndex)
                __field(__u16, wLength)
+               __dynamic_array(char, str, DWC3_MSG_MAX)
        ),
        TP_fast_assign(
                __entry->bRequestType = ctrl->bRequestType;
@@ -93,10 +94,9 @@ DECLARE_EVENT_CLASS(dwc3_log_ctrl,
                __entry->wIndex = le16_to_cpu(ctrl->wIndex);
                __entry->wLength = le16_to_cpu(ctrl->wLength);
        ),
-       TP_printk("bRequestType %02x bRequest %02x wValue %04x wIndex %04x wLength %d",
-               __entry->bRequestType, __entry->bRequest,
-               __entry->wValue, __entry->wIndex,
-               __entry->wLength
+       TP_printk("%s", dwc3_decode_ctrl(__get_str(str), __entry->bRequestType,
+                                       __entry->bRequest, __entry->wValue,
+                                       __entry->wIndex, __entry->wLength)
        )
 );