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https://github.com/AsahiLinux/u-boot
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fastboot: OUT transaction length must be aligned to wMaxPacketSize
OUT transactions must be aligned to wMaxPacketSize for each transfer, or else transfer will not complete successfully. This patch modifies rx_bytes_expected to return a transfer length that is aligned to wMaxPacketSize. Note that the value of wMaxPacketSize and ep->maxpacket may not be the same value, and it is the value of wMaxPacketSize that should be used for alignment. wMaxPacketSize is passed depending on the speed of connection. Signed-off-by: Dileep Katta <dileep.katta@linaro.org> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
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parent
7c23bcb93f
commit
9e4b510d40
1 changed files with 22 additions and 5 deletions
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@ -55,6 +55,7 @@ static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
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static struct f_fastboot *fastboot_func;
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static unsigned int download_size;
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static unsigned int download_bytes;
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static bool is_high_speed;
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static struct usb_endpoint_descriptor fs_ep_in = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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@ -219,10 +220,13 @@ static int fastboot_set_alt(struct usb_function *f,
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__func__, f->name, interface, alt);
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/* make sure we don't enable the ep twice */
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if (gadget->speed == USB_SPEED_HIGH)
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if (gadget->speed == USB_SPEED_HIGH) {
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ret = usb_ep_enable(f_fb->out_ep, &hs_ep_out);
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else
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is_high_speed = true;
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} else {
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ret = usb_ep_enable(f_fb->out_ep, &fs_ep_out);
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is_high_speed = false;
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}
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if (ret) {
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puts("failed to enable out ep\n");
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return ret;
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@ -370,13 +374,20 @@ static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
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fastboot_tx_write_str(response);
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}
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static unsigned int rx_bytes_expected(void)
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static unsigned int rx_bytes_expected(unsigned int maxpacket)
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{
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int rx_remain = download_size - download_bytes;
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int rem = 0;
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if (rx_remain < 0)
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return 0;
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if (rx_remain > EP_BUFFER_SIZE)
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return EP_BUFFER_SIZE;
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if (rx_remain < maxpacket) {
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rx_remain = maxpacket;
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} else if (rx_remain % maxpacket != 0) {
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rem = rx_remain % maxpacket;
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rx_remain = rx_remain + (maxpacket - rem);
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}
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return rx_remain;
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}
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@ -388,6 +399,7 @@ static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
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const unsigned char *buffer = req->buf;
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unsigned int buffer_size = req->actual;
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unsigned int pre_dot_num, now_dot_num;
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unsigned int max;
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if (req->status != 0) {
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printf("Bad status: %d\n", req->status);
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@ -425,7 +437,9 @@ static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
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printf("\ndownloading of %d bytes finished\n", download_bytes);
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} else {
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req->length = rx_bytes_expected();
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max = is_high_speed ? hs_ep_out.wMaxPacketSize :
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fs_ep_out.wMaxPacketSize;
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req->length = rx_bytes_expected(max);
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if (req->length < ep->maxpacket)
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req->length = ep->maxpacket;
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}
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@ -438,6 +452,7 @@ static void cb_download(struct usb_ep *ep, struct usb_request *req)
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{
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char *cmd = req->buf;
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char response[RESPONSE_LEN];
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unsigned int max;
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strsep(&cmd, ":");
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download_size = simple_strtoul(cmd, NULL, 16);
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@ -453,7 +468,9 @@ static void cb_download(struct usb_ep *ep, struct usb_request *req)
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} else {
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sprintf(response, "DATA%08x", download_size);
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req->complete = rx_handler_dl_image;
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req->length = rx_bytes_expected();
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max = is_high_speed ? hs_ep_out.wMaxPacketSize :
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fs_ep_out.wMaxPacketSize;
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req->length = rx_bytes_expected(max);
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if (req->length < ep->maxpacket)
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req->length = ep->maxpacket;
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}
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