[U-Boot] [PATCH v2] usb: gadget: fastboot: improve download progress bar

[Bo Shen]

When download is ongoing, if the actual size of one transfer
is not the same as BTYES_PER_DOT, which will cause the dot
won't print anymore. Then it will let the user thinking it
is stuck, actually it is transfering without dot printed.

So, improve the method to show the progress bar (print dot).

Signed-off-by: Bo Shen <voice.shen at atmel.com>
---
Changes in v2:
  - get rid of the global variable.
  - avoid the dot print after showing the total download length.

 drivers/usb/gadget/f_fastboot.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 7a1acb9..dda9d1c 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -380,6 +380,7 @@ static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 	unsigned int transfer_size = download_size - download_bytes;
 	const unsigned char *buffer = req->buf;
 	unsigned int buffer_size = req->actual;
+	unsigned int pre_dot_num, now_dot_num;
 
 	if (req->status != 0) {
 		printf("Bad status: %d\n", req->status);
@@ -392,7 +393,15 @@ static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 	memcpy((void *)CONFIG_USB_FASTBOOT_BUF_ADDR + download_bytes,
 	       buffer, transfer_size);
 
+	pre_dot_num = download_bytes / BYTES_PER_DOT;
 	download_bytes += transfer_size;
+	now_dot_num = download_bytes / BYTES_PER_DOT;
+
+	if (pre_dot_num != now_dot_num) {
+		putc('.');
+		if (!(now_dot_num % 74))
+			putc('\n');
+	}
 
 	/* Check if transfer is done */
 	if (download_bytes >= download_size) {
@@ -414,11 +423,6 @@ static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 			req->length = ep->maxpacket;
 	}
 
-	if (download_bytes && !(download_bytes % BYTES_PER_DOT)) {
-		putc('.');
-		if (!(download_bytes % (74 * BYTES_PER_DOT)))
-			putc('\n');
-	}
 	req->actual = 0;
 	usb_ep_queue(ep, req, 0);
 }
-- 
2.1.0.24.g4109c28