use class driver open() for interface support detection

tested with dfu_runtime

examples/device/dfu_rt/src/main.h

@@ -1,5 +0,0 @@
-#ifndef MAIN_H
-#define MAIN_H
-void led_indicator_pulse(void);
-
-#endif

examples/device/dfu_rt/src/usb_descriptors.c

@@ -77,92 +77,25 @@ uint8_t const * tud_descriptor_device_cb(void)
   return (uint8_t const *) &desc_device;
 }
 
-//--------------------------------------------------------------------+
-// HID Report Descriptor
-//--------------------------------------------------------------------+
-#if CFG_TUD_HID
-
-uint8_t const desc_hid_report[] =
-{
-  TUD_HID_REPORT_DESC_KEYBOARD( HID_REPORT_ID(REPORT_ID_KEYBOARD), ),
-  TUD_HID_REPORT_DESC_MOUSE   ( HID_REPORT_ID(REPORT_ID_MOUSE), )
-};
-
-// Invoked when received GET HID REPORT DESCRIPTOR
-// Application return pointer to descriptor
-// Descriptor contents must exist long enough for transfer to complete
-uint8_t const * tud_hid_descriptor_report_cb(void)
-{
-  return desc_hid_report;
-}
-
-#endif
-
 //--------------------------------------------------------------------+
 // Configuration Descriptor
 //--------------------------------------------------------------------+
 
 enum
 {
-#if CFG_TUD_CDC
-  ITF_NUM_CDC = 0,
-  ITF_NUM_CDC_DATA,
-#endif
-
-#if CFG_TUD_MSC
-  ITF_NUM_MSC,
-#endif
-
-#if CFG_TUD_HID
-  ITF_NUM_HID,
-#endif
-
-#if CFG_TUD_DFU_RT
   ITF_NUM_DFU_RT,
-#endif
-
   ITF_NUM_TOTAL
 };
 
-
-#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + CFG_TUD_CDC*TUD_CDC_DESC_LEN + CFG_TUD_MSC*TUD_MSC_DESC_LEN +  \
-    CFG_TUD_HID*TUD_HID_DESC_LEN  + (CFG_TUD_DFU_RT)*TUD_DFU_RT_DESC_LEN)
-
-#if CFG_TUSB_MCU == OPT_MCU_LPC175X_6X || CFG_TUSB_MCU == OPT_MCU_LPC177X_8X || CFG_TUSB_MCU == OPT_MCU_LPC40XX
-  // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number
-  // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In etc ...
-  // Note: since CDC EP ( 1 & 2), HID (4) are spot-on, thus we only need to force
-  // endpoint number for MSC to 5
-  #define EPNUM_MSC   0x05
-#else
-  #define EPNUM_MSC   0x03
-#endif
-
+#define CONFIG_TOTAL_LEN    (TUD_CONFIG_DESC_LEN + TUD_DFU_RT_DESC_LEN)
 
 uint8_t const desc_configuration[] =
 {
   // Config number, interface count, string index, total length, attribute, power in mA
   TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
 
-#if CFG_TUD_CDC
-  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
-  TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 1, 0x81, 8, 0x02, 0x82, 64),
-#endif
-
-#if CFG_TUD_MSC
-  // Interface number, string index, EP Out & EP In address, EP size
-  TUD_MSC_DESCRIPTOR(ITF_NUM_MSC, 5, EPNUM_MSC, 0x80 | EPNUM_MSC, (CFG_TUSB_RHPORT0_MODE & OPT_MODE_HIGH_SPEED) ? 512 : 64),
-#endif
-
-#if CFG_TUD_HID
-  // Interface number, string index, protocol, report descriptor len, EP In address, size & polling interval
-  TUD_HID_DESCRIPTOR(ITF_NUM_HID, 6, HID_PROTOCOL_NONE, sizeof(desc_hid_report), 0x84, 16, 10),
-#endif
-
-#if CFG_TUD_DFU_RT
   // Interface number, string index, attributes, detach timeout, transfer size */
-  TUD_DFU_RT_DESCRIPTOR(ITF_NUM_DFU_RT, 7, 0x0d, 1000, 4096),
-#endif
+  TUD_DFU_RT_DESCRIPTOR(ITF_NUM_DFU_RT, 4, 0x0d, 1000, 4096),
 };
 
 

src/class/dfu/dfu_rt_device.c

@@ -61,8 +61,8 @@ bool dfu_rtd_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16
   (void) rhport;
 
   // Ensure this is DFU Runtime
-  TU_ASSERT(itf_desc->bInterfaceSubClass == TUD_DFU_APP_SUBCLASS);
-  TU_ASSERT(itf_desc->bInterfaceProtocol == DFU_PROTOCOL_RT);
+  TU_VERIFY(itf_desc->bInterfaceSubClass == TUD_DFU_APP_SUBCLASS);
+  TU_VERIFY(itf_desc->bInterfaceProtocol == DFU_PROTOCOL_RT);
 
   uint8_t const * p_desc = tu_desc_next( itf_desc );
   (*p_length) = sizeof(tusb_desc_interface_t);

src/class/dfu/dfu_rt_device.h

@@ -58,7 +58,7 @@ typedef enum
 //--------------------------------------------------------------------+
 
 // Invoked when received new data
-TU_ATTR_WEAK void tud_dfu_rt_reboot_to_dfu(void);
+TU_ATTR_WEAK void tud_dfu_rt_reboot_to_dfu(void); // TODO rename to _cb convention
 
 //--------------------------------------------------------------------+
 // Internal Class Driver API

src/device/usbd.c

@@ -76,8 +76,8 @@ enum { DRVID_INVALID = 0xFFu };
 typedef struct
 {
   uint8_t class_code;
-  uint8_t subclass; // 0xFF support all values of subclass
-  uint8_t protocol; // 0xFF support all values of protocol
+  uint8_t subclass;
+  uint8_t protocol;
 
   struct TU_ATTR_PACKED
   {
@@ -299,7 +299,7 @@ static osal_queue_t _usbd_q;
 // Prototypes
 //--------------------------------------------------------------------+
 static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id);
-static uint8_t find_driver_id(tusb_desc_interface_t const * desc_itf);
+//static uint8_t find_driver_id(tusb_desc_interface_t const * desc_itf);
 
 static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request);
 static bool process_set_config(uint8_t rhport, uint8_t cfg_num);
@@ -346,6 +346,9 @@ static char const* const _usbd_driver_str[USBD_CLASS_DRIVER_COUNT] =
   #if CFG_TUD_VENDOR
     "Vendor",
   #endif
+  #if CFG_TUD_DFU_RT
+    "DFU Runtime",
+  #endif
   #if CFG_TUD_USBTMC
     "USBTMC"
   #endif
@@ -823,6 +826,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
 
       tusb_desc_interface_t const * desc_itf = (tusb_desc_interface_t const*) p_desc;
 
+#if 0
       // Find driver id for the interface
       uint8_t drv_id = find_driver_id(desc_itf);
       TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT );
@@ -835,8 +839,31 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
       TU_LOG2("  %s open\r\n", _usbd_driver_str[drv_id]);
       TU_ASSERT( _usbd_driver[drv_id].open(rhport, desc_itf, &itf_len) );
       TU_ASSERT( itf_len >= sizeof(tusb_desc_interface_t) );
+#else
+      uint8_t drv_id;
+      uint16_t itf_len;
+
+      for (drv_id = 0; drv_id < USBD_CLASS_DRIVER_COUNT; drv_id++)
+      {
+        usbd_class_driver_t const *driver = &_usbd_driver[drv_id];
+
+        itf_len = 0;
+        if ( driver->open(rhport, desc_itf, &itf_len) )
+        {
+          // Interface number must not be used already TODO alternate interface
+          TU_ASSERT( DRVID_INVALID == _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] );
+          _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] = drv_id;
 
-      mark_interface_endpoint(_usbd_dev.ep2drv, p_desc, itf_len, drv_id);
+          TU_LOG2("  itf_len = %d \r\n", itf_len);
+          break;
+        }
+      }
+
+      // Assert if cannot find a driver
+      TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT && itf_len >= sizeof(tusb_desc_interface_t) );
+#endif
+
+      mark_interface_endpoint(_usbd_dev.ep2drv, p_desc, itf_len, drv_id); // TODO refactor
 
       p_desc += itf_len; // next interface
     }
@@ -848,6 +875,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
   return true;
 }
 
+#if 0
 // Helper to find class driver id for an interface
 // return 0xFF if not found
 static uint8_t find_driver_id(tusb_desc_interface_t const * desc_itf)
@@ -865,6 +893,7 @@ static uint8_t find_driver_id(tusb_desc_interface_t const * desc_itf)
 
   return DRVID_INVALID;
 }
+#endif
 
 // Helper marking endpoint of interface belongs to class driver
 static void mark_interface_endpoint(uint8_t ep2drv[8][2], uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id)