Better support for multi-interface HID: Logitech unifying receivers

- Select mouse interface first
 - Correctly specify active interface when retrieving HID descriptors

Downstream/Inc/usbh_config.h

@@ -53,7 +53,7 @@
 #define USBH_MAX_NUM_ENDPOINTS      2 
  
 /*----------   -----------*/
-#define USBH_MAX_NUM_INTERFACES      2 
+#define USBH_MAX_NUM_INTERFACES      3
  
 /*----------   -----------*/
 #define USBH_MAX_NUM_CONFIGURATION      1 

Downstream/Middlewares/ST/STM32_USB_Host_Library/Class/HID/Src/usbh_hid.c

@@ -141,44 +141,30 @@ static USBH_StatusTypeDef USBH_HID_InterfaceInit (USBH_HandleTypeDef *phost)
 {	
   uint8_t max_ep;
   uint8_t num = 0;
-  uint8_t interface;
+  uint8_t interface = 0xFF;
   
-  USBH_StatusTypeDef status = USBH_FAIL ;
   HID_HandleTypeDef *HID_Handle;
 
-  interface = USBH_FindInterface(phost, phost->pActiveClass->ClassCode, HID_BOOT_CODE, 0xFF);
+  
+#ifdef CONFIG_MOUSE_ENABLED
+  interface = USBH_FindInterface(phost, phost->pActiveClass->ClassCode, HID_BOOT_CODE, HID_MOUSE_BOOT_CODE);        //Search for mouse interfaces first
+#endif
+#ifdef CONFIG_KEYBOARD_ENABLED
+  if (interface == 0xFF)
+  {
+      interface = USBH_FindInterface(phost, phost->pActiveClass->ClassCode, HID_BOOT_CODE, HID_KEYBRD_BOOT_CODE);
+  }
+#endif
   
   if(interface == 0xFF) /* No Valid Interface */
   {
-    status = USBH_FAIL;  
     USBH_DbgLog ("Cannot Find the interface for %s class.", phost->pActiveClass->Name);
+    return USBH_FAIL;
   }
-  else
+
-  {
     USBH_SelectInterface (phost, interface);
     phost->pActiveClass->pData = (HID_HandleTypeDef *)USBH_malloc (sizeof(HID_HandleTypeDef));
     HID_Handle =  (HID_HandleTypeDef *) phost->pActiveClass->pData; 
-    HID_Handle->state = HID_ERROR;
-    
-    /*Decode Bootclass Protocol: Mouse or Keyboard*/
-#ifdef CONFIG_KEYBOARD_ENABLED
-    if(phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].bInterfaceProtocol == HID_KEYBRD_BOOT_CODE)
-    {
-      USBH_UsrLog ("KeyBoard device found!"); 
-    }
-    else
-#endif
-#ifdef CONFIG_MOUSE_ENABLED
-    if(phost->device.CfgDesc.Itf_Desc[phost->device.current_interface].bInterfaceProtocol == HID_MOUSE_BOOT_CODE)
-    {
-      USBH_UsrLog ("Mouse device found!");         
-    }
-    else
-#endif
-    {
-      USBH_UsrLog ("Protocol not supported.");  
-      return USBH_FAIL;
-    }
     
     HID_Handle->state     = HID_INIT;
     HID_Handle->ctl_state = HID_REQ_INIT; 
@@ -245,9 +231,7 @@ static USBH_StatusTypeDef USBH_HID_InterfaceInit (USBH_HandleTypeDef *phost)
       }
       
     }  
-    status = USBH_OK;
+    return USBH_OK;
-  }
-  return status;
 }
 
 /**
@@ -489,6 +473,7 @@ USBH_StatusTypeDef USBH_HID_GetHIDReportDescriptor (USBH_HandleTypeDef *phost,
   status = USBH_GetDescriptor(phost,
                               USB_REQ_RECIPIENT_INTERFACE | USB_REQ_TYPE_STANDARD,                                  
                               USB_DESC_HID_REPORT,
+                              phost->device.current_interface,
                               phost->device.Data,
                               length);
   
@@ -524,6 +509,7 @@ USBH_StatusTypeDef USBH_HID_GetHIDDescriptor (USBH_HandleTypeDef *phost,
   status = USBH_GetDescriptor( phost,
                               USB_REQ_RECIPIENT_INTERFACE | USB_REQ_TYPE_STANDARD,                                  
                               USB_DESC_HID,
+                              phost->device.current_interface,
                               phost->device.Data,
                               length);
  

Downstream/Middlewares/ST/STM32_USB_Host_Library/Core/Inc/usbh_ctlreq.h

@@ -102,7 +102,8 @@ USBH_StatusTypeDef USBH_CtlReq     (USBH_HandleTypeDef *phost,
 
 USBH_StatusTypeDef USBH_GetDescriptor(USBH_HandleTypeDef *phost,                                
                                uint8_t  req_type,
-                               uint16_t value_idx, 
+                               uint16_t type_idx,
+                               uint16_t value,
                                uint8_t* buff, 
                                uint16_t length );
 

Downstream/Middlewares/ST/STM32_USB_Host_Library/Core/Src/usbh_ctlreq.c

@@ -124,6 +124,7 @@ USBH_StatusTypeDef USBH_Get_DevDesc(USBH_HandleTypeDef *phost, uint16_t length)
   if((status = USBH_GetDescriptor(phost,
                                   USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,                          
                                   USB_DESC_DEVICE,
+                                  0,
                                   phost->device.Data,
                                   length)) == USBH_OK)
   {
@@ -167,6 +168,7 @@ USBH_StatusTypeDef USBH_Get_CfgDesc(USBH_HandleTypeDef *phost,
   if((status = USBH_GetDescriptor(phost,
                                   USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,                          
                                   USB_DESC_CONFIGURATION,
+                                  0,
                                   pData,
                                   length)) == USBH_OK)
   {
@@ -205,6 +207,7 @@ USBH_StatusTypeDef USBH_Get_StringDesc(USBH_HandleTypeDef *phost,
   if((status = USBH_GetDescriptor(phost,
                                   USB_REQ_RECIPIENT_DEVICE | USB_REQ_TYPE_STANDARD,                                    
                                   USB_DESC_STRING | string_index,
+                                  0x0409,
                                   phost->device.Data,
                                   length)) == USBH_OK)
   {
@@ -227,7 +230,8 @@ USBH_StatusTypeDef USBH_Get_StringDesc(USBH_HandleTypeDef *phost,
   */
 USBH_StatusTypeDef USBH_GetDescriptor(USBH_HandleTypeDef *phost,                          
                                uint8_t  req_type,
-                               uint16_t value_idx, 
+                               uint16_t type_idx,
+                               uint16_t value,
                                uint8_t* buff, 
                                uint16_t length )
 { 
@@ -235,16 +239,8 @@ USBH_StatusTypeDef USBH_GetDescriptor(USBH_HandleTypeDef *phost,
   {
     phost->Control.setup.b.bmRequestType = USB_D2H | req_type;
     phost->Control.setup.b.bRequest = USB_REQ_GET_DESCRIPTOR;
-    phost->Control.setup.b.wValue.w = value_idx;
+    phost->Control.setup.b.wValue.w = type_idx;
-    
+    phost->Control.setup.b.wIndex.w = value;
-    if ((value_idx & 0xff00) == USB_DESC_STRING)
-    {
-      phost->Control.setup.b.wIndex.w = 0x0409;
-    }
-    else
-    {
-      phost->Control.setup.b.wIndex.w = 0;
-    }
     phost->Control.setup.b.wLength.w = length; 
   }
   return USBH_CtlReq(phost, buff , length );