int usb_write(void *buf, unsigned len)
{
int r;
if (fastboot_state == STATE_ERROR)
goto oops;
req->buf = buf;
req->length = len;
req->complete = req_complete;
r = udc_request_queue(in, req);
if (r < 0) {
dprintf(INFO, "usb_write() queue failed\n");
goto oops;
}
event_wait(&txn_done);
if (txn_status < 0) {
dprintf(INFO, "usb_write() transaction failed\n");
goto oops;
}
return req->length;
oops:
fastboot_state = STATE_ERROR;
return -1;
}
static int usb_read(void *_buf, unsigned len)
{
int r;
unsigned xfer;
unsigned char *buf = _buf;
int count = 0;
if (fastboot_state == STATE_ERROR)
goto oops;
while (len > 0) {
xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
req->buf = PA((addr_t)buf);
req->length = xfer;
req->complete = req_complete;
r = udc_request_queue(out, req);
if (r < 0) {
dprintf(INFO, "usb_read() queue failed\n");
goto oops;
}
event_wait(&txn_done);
if (txn_status < 0) {
dprintf(INFO, "usb_read() transaction failed\n");
goto oops;
}
count += req->length;
buf += req->length;
len -= req->length;
/* short transfer? */
if (req->length != xfer) break;
}
/*
* Force reload of buffer from memory
* since transaction is complete now.
*/
arch_invalidate_cache_range(_buf, count);
return count;
oops:
fastboot_state = STATE_ERROR;
return -1;
}
int usb_read(void *_buf, unsigned len)
{
int r;
unsigned xfer;
unsigned char *buf = _buf;
int count = 0;
if (fastboot_state == STATE_ERROR)
goto oops;
while (len > 0) {
xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
req->buf = buf;
req->length = xfer;
req->complete = req_complete;
r = udc_request_queue(out, req);
if (r < 0) {
dprintf(INFO, "usb_read() queue failed\n");
goto oops;
}
event_wait(&txn_done);
if (txn_status < 0) {
dprintf(INFO, "usb_read() transaction failed\n");
goto oops;
}
count += req->length;
buf += req->length;
len -= req->length;
/* short transfer? */
if (req->length != xfer) break;
}
return count;
oops:
fastboot_state = STATE_ERROR;
return -1;
}