usb: rename usb_drv_recv() to usb_recv_recv_nonblocking()

IMHO the current name is somewhat misleading:

- usb_drv_send() is blocking and we have usb_drv_send_nonblocking()
  for the non-blocking case. This inconsistent naming can only
  promote confusion. (And what would we call a blocking receive?)

- Other hardware abstraction APIs in Rockbox are usually blocking:
  storage, LCD, backlight, audio... in other words, blocking is the
  default expected behavior, with non-blocking calls being a rarity.

Change-Id: I05b41088d09eab582697674f4f06fdca0c8950af

firmware/drivers/isp1583.c

@@ -531,9 +531,9 @@ static void in_callback(int ep, unsigned char *buf, int len)
     usb_core_transfer_complete(ep, false, 0, len);
 }
 
-int usb_drv_recv(int ep, void* ptr, int length)
+int usb_drv_recv_nonblocking(int ep, void* ptr, int length)
 {
-    logf("usb_drv_recv(%d, 0x%x, %d)", ep, (int)ptr, length);
+    logf("usb_drv_recv_nonblocking(%d, 0x%x, %d)", ep, (int)ptr, length);
     if(ep == EP_CONTROL && length == 0 && ptr == NULL)
     {
         usb_status_ack(ep, DIR_TX);

firmware/drivers/m66591.c

@@ -869,7 +869,7 @@ int usb_drv_send(int endpoint, void* ptr, int length)
 /* This function begins a receive (on an OUT endpoint), it should not block
  *  so the actual receive is done in the interrupt handler.
  */
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     return mxx_queue(endpoint, ptr, length, false, false);
 }

firmware/drivers/usb-designware.c

@@ -1333,7 +1333,7 @@ void usb_drv_release_endpoint(int endpoint)
     usb_dw_target_enable_irq();
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     int epnum = EP_NUM(endpoint);
     struct usb_dw_ep* dw_ep = usb_dw_get_ep(epnum, USB_DW_EPDIR_OUT);

firmware/export/usb_drv.h

@@ -68,8 +68,7 @@ void usb_drv_stall(int endpoint, bool stall,bool in);
 bool usb_drv_stalled(int endpoint,bool in);
 int usb_drv_send(int endpoint, void* ptr, int length);
 int usb_drv_send_nonblocking(int endpoint, void* ptr, int length);
-int usb_drv_recv(int endpoint, void* ptr, int length);
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length);
-void usb_drv_ack(struct usb_ctrlrequest* req);
 void usb_drv_set_address(int address);
 void usb_drv_reset_endpoint(int endpoint, bool send);
 bool usb_drv_powered(void);

firmware/target/arm/as3525/usb-drv-as3525.c

@@ -412,12 +412,12 @@ void usb_drv_cancel_all_transfers(void)
     restore_irq(flags);
 }
 
-int usb_drv_recv(int ep, void *ptr, int len)
+int usb_drv_recv_nonblocking(int ep, void *ptr, int len)
 {
     struct usb_dev_dma_desc *uc_desc = endpoints[ep][1].uc_desc;
 
     ep &= 0x7f;
-    logf("usb_drv_recv(%d,%x,%d)\n", ep, (int)ptr, len);
+    logf("usb_drv_recv_nonblocking(%d,%x,%d)\n", ep, (int)ptr, len);
 
     if (len > USB_DMA_DESC_RXTX_BYTES)
         panicf("usb_recv: len=%d > %d", len, USB_DMA_DESC_RXTX_BYTES);
@@ -674,7 +674,8 @@ static void handle_out_ep(int ep)
  * The usb_storage buffer is 63KB, but Linux sends 120KB.
  * We get the first part, but upon re-enabling receive dma we
  * get a 'buffer not available' error from the hardware, since
- * we haven't gotten the next usb_drv_recv() from the stack yet.
+ * we haven't gotten the next usb_drv_recv_nonblocking() from
+ * the stack yet.
  * It seems the NAK bit is ignored here and the HW tries to dma
  * the incoming data anyway.
  * In theory I think the BNA error should be recoverable, but

firmware/target/arm/rk27xx/usb-drv-rk27xx.c

@@ -355,7 +355,7 @@ int usb_drv_send_nonblocking(int endpoint, void *ptr, int length)
 }
 
 /* Setup a receive transfer. (non blocking) */
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     logf("udc: recv(%x)", endpoint);
     struct endpoint_t *ep;

firmware/target/arm/tms320dm320/sansa-connect/tnetv105_usb_drv.c

@@ -1026,8 +1026,8 @@ static bool tnetv_handle_cppi(void)
     if (rx_intstatus || tx_intstatus || rcv_sched)
     {
         /* Request calling again after short delay
-         * Needed when for example when OUT endpoint has pending
+         * Needed when for example when OUT endpoint has pending data
-         * data but the USB task did not call usb_drv_recv() yet.
+         * but the USB task did not call usb_drv_recv_nonblocking() yet.
          */
         return true;
     }
@@ -1371,7 +1371,7 @@ int usb_drv_send_nonblocking(int endpoint, void* ptr, int length)
     return _usb_drv_send(endpoint, ptr, length, false);
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     int epn = EP_NUM(endpoint);
     struct ep_runtime_t *ep;
@@ -1388,8 +1388,6 @@ int usb_drv_recv(int endpoint, void* ptr, int length)
     return 0;
 }
 
-void usb_drv_ack(struct usb_ctrlrequest* req);
-
 void usb_drv_set_address(int address)
 {
     UsbCtrlType usbCtrl;

firmware/target/arm/usb-drv-arc.c

@@ -593,7 +593,7 @@ int usb_drv_send(int endpoint, void* ptr, int length)
     return prime_transfer(EP_NUM(endpoint), ptr, length, true, true);
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     //logf("usbrecv(%x, %d)", ptr, length);
     return prime_transfer(EP_NUM(endpoint), ptr, length, false, false);

firmware/target/arm/usb-s3c6400x.c

@@ -166,7 +166,7 @@ int usb_drv_send_nonblocking(int endpoint, void *ptr, int length)
     return 0;
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     ep_transfer(EP_NUM(endpoint), ptr, length, true);
     return 0;

firmware/target/arm/usb-tcc.c

@@ -609,7 +609,7 @@ int usb_drv_send_nonblocking(int endpoint, void *ptr, int length)
     return rc;
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     volatile struct tcc_ep *tcc_ep = &tcc_endpoints[endpoint & 0x7f];
     int flags;

firmware/target/mips/ingenic_jz47xx/usb-jz4740.c

@@ -743,7 +743,7 @@ int usb_drv_send(int endpoint, void* ptr, int length)
     return 0;
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     int flags;
     struct usb_endpoint *ep;

firmware/target/mips/ingenic_jz47xx/usb-jz4760.c

@@ -1118,7 +1118,7 @@ int usb_drv_send(int endpoint, void* ptr, int length)
     return -1;
 }
 
-int usb_drv_recv(int endpoint, void* ptr, int length)
+int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
 {
     int flags;
     struct usb_endpoint *ep;

firmware/usbstack/usb_core.c

@@ -674,7 +674,7 @@ static void request_handler_device_get_descriptor(struct usb_ctrlrequest* req)
         if (ptr != response_data)
             memcpy(response_data, ptr, length);
 
-        usb_drv_recv(EP_CONTROL, NULL, 0);
+        usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
         usb_drv_send(EP_CONTROL, response_data, length);
     }
 }
@@ -725,7 +725,7 @@ static void request_handler_device(struct usb_ctrlrequest* req)
         case USB_REQ_GET_CONFIGURATION: {
                 logf("usb_core: GET_CONFIG");
                 response_data[0] = (usb_state == ADDRESS ? 0 : 1);
-                usb_drv_recv(EP_CONTROL, NULL, 0);
+                usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
                 usb_drv_send(EP_CONTROL, response_data, 1);
                 break;
             }
@@ -759,7 +759,7 @@ static void request_handler_device(struct usb_ctrlrequest* req)
         case USB_REQ_GET_STATUS:
             response_data[0] = 0;
             response_data[1] = 0;
-            usb_drv_recv(EP_CONTROL, NULL, 0);
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
             usb_drv_send(EP_CONTROL, response_data, 2);
             break;
         default:
@@ -781,7 +781,7 @@ static void request_handler_interface_standard(struct usb_ctrlrequest* req)
         case USB_REQ_GET_INTERFACE:
             logf("usb_core: GET_INTERFACE");
             response_data[0] = 0;
-            usb_drv_recv(EP_CONTROL, NULL, 0);
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
             usb_drv_send(EP_CONTROL, response_data, 1);
             break;
         case USB_REQ_CLEAR_FEATURE:
@@ -791,7 +791,7 @@ static void request_handler_interface_standard(struct usb_ctrlrequest* req)
         case USB_REQ_GET_STATUS:
             response_data[0] = 0;
             response_data[1] = 0;
-            usb_drv_recv(EP_CONTROL, NULL, 0);
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
             usb_drv_send(EP_CONTROL, response_data, 2);
             break;
         default:
@@ -860,7 +860,7 @@ static void request_handler_endpoint_standard(struct usb_ctrlrequest* req)
                 response_data[0] = usb_drv_stalled(EP_NUM(req->wIndex),
                                                     EP_DIR(req->wIndex));
             
-            usb_drv_recv(EP_CONTROL, NULL, 0);
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0);
             usb_drv_send(EP_CONTROL, response_data, 2);
             break;
         default:

firmware/usbstack/usb_hid.c

@@ -693,7 +693,7 @@ static int usb_hid_set_report(struct usb_ctrlrequest *req)
     }
 
     memset(buf, 0, length);
-    usb_drv_recv(EP_CONTROL, buf, length);
+    usb_drv_recv_nonblocking(EP_CONTROL, buf, length);
 
 #ifdef LOGF_ENABLE
     if (buf[1] & 0x01)
@@ -772,7 +772,7 @@ bool usb_hid_control_request(struct usb_ctrlrequest *req, unsigned char *dest)
 
         if (dest != orig_dest)
         {
-            usb_drv_recv(EP_CONTROL, NULL, 0); /* ack */
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0); /* ack */
             usb_drv_send(EP_CONTROL, orig_dest, dest - orig_dest);
             return true;
         }
@@ -809,7 +809,7 @@ bool usb_hid_control_request(struct usb_ctrlrequest *req, unsigned char *dest)
 
         if (dest != orig_dest)
         {
-            usb_drv_recv(EP_CONTROL, NULL, 0); /* ack */
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0); /* ack */
             usb_drv_send(EP_CONTROL, orig_dest, dest - orig_dest);
         }
         else

firmware/usbstack/usb_serial.c

@@ -294,7 +294,7 @@ bool usb_serial_control_request(struct usb_ctrlrequest* req, unsigned char* dest
             if (req->wLength == sizeof(line_coding))
             {
                 /* Receive line coding into local copy */
-                usb_drv_recv(EP_CONTROL, &line_coding, sizeof(line_coding));
+                usb_drv_recv_nonblocking(EP_CONTROL, &line_coding, sizeof(line_coding));
                 usb_drv_send(EP_CONTROL, NULL, 0); /* ack */
                 handled = true;
             }
@@ -316,7 +316,7 @@ bool usb_serial_control_request(struct usb_ctrlrequest* req, unsigned char* dest
             if (req->wLength == sizeof(line_coding))
             {
                 /* Send back line coding so host is happy */
-                usb_drv_recv(EP_CONTROL, NULL, 0); /* ack */
+                usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0); /* ack */
                 usb_drv_send(EP_CONTROL, &line_coding, sizeof(line_coding));
                 handled = true;
             }
@@ -329,7 +329,7 @@ bool usb_serial_control_request(struct usb_ctrlrequest* req, unsigned char* dest
 void usb_serial_init_connection(void)
 {
     /* prime rx endpoint */
-    usb_drv_recv(ep_out, receive_buffer, sizeof receive_buffer);
+    usb_drv_recv_nonblocking(ep_out, receive_buffer, sizeof receive_buffer);
 
     /* we come here too after a bus reset, so reset some data */
     buffer_transitlength = 0;
@@ -420,7 +420,7 @@ void usb_serial_transfer_complete(int ep,int dir, int status, int length)
             /* Data received. TODO : Do something with it ? */
 
             /* Get the next bit */
-            usb_drv_recv(ep_out, receive_buffer, sizeof receive_buffer);
+            usb_drv_recv_nonblocking(ep_out, receive_buffer, sizeof receive_buffer);
             break;
 
         case USB_DIR_IN:

firmware/usbstack/usb_storage.c

@@ -470,7 +470,7 @@ void usb_storage_init_connection(void)
     ramdisk_buffer = tb.transfer_buffer + ALLOCATE_BUFFER_SIZE;
 #endif
 #endif
-    usb_drv_recv(ep_out, cbw_buffer, MAX_CBW_SIZE);
+    usb_drv_recv_nonblocking(ep_out, cbw_buffer, MAX_CBW_SIZE);
 
     int i;
     for(i=0;i<storage_num_drives();i++) {
@@ -685,7 +685,7 @@ bool usb_storage_control_request(struct usb_ctrlrequest* req, unsigned char* des
             if(skip_first) (*tb.max_lun) --;
 #endif
             logf("ums: getmaxlun");
-            usb_drv_recv(EP_CONTROL, NULL, 0); /* ack */
+            usb_drv_recv_nonblocking(EP_CONTROL, NULL, 0); /* ack */
             usb_drv_send(EP_CONTROL, tb.max_lun, 1);
             handled = true;
             break;
@@ -1187,14 +1187,14 @@ static void send_command_failed_result(void)
 #if CONFIG_RTC
 static void receive_time(void)
 {
-    usb_drv_recv(ep_out, tb.transfer_buffer, 12);
+    usb_drv_recv_nonblocking(ep_out, tb.transfer_buffer, 12);
     state = RECEIVING_TIME;
 }
 #endif /* CONFIG_RTC */
 
 static void receive_block_data(void *data,int size)
 {
-    usb_drv_recv(ep_out, data, size);
+    usb_drv_recv_nonblocking(ep_out, data, size);
     state = RECEIVING_BLOCKS;
 }
 
@@ -1210,7 +1210,7 @@ static void send_csw(int status)
     state = WAITING_FOR_CSW_COMPLETION_OR_COMMAND;
     //logf("CSW: %X",status);
     /* Already start waiting for the next command */
-    usb_drv_recv(ep_out, cbw_buffer, MAX_CBW_SIZE);
+    usb_drv_recv_nonblocking(ep_out, cbw_buffer, MAX_CBW_SIZE);
     /* The next completed transfer will be either the CSW one
      * or the new command */