fastboot: multiresponse support
Currently u-boot fastboot can only send one message back to host,
so if there is a need to print more than one line messages must be
kept sending until all the required data is obtained. This behavior
can be adjusted using multiresponce ability (getting multiple lines
of response) proposed in this patch.
Signed-off-by: Ion Agorria <ion@agorria.com>
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240105072212.6615-2-clamor95@gmail.com
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 9f322c9..09e740c 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -497,6 +497,25 @@
do_exit_on_complete(ep, req);
}
+static int multiresponse_cmd = -1;
+static void multiresponse_on_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ char response[FASTBOOT_RESPONSE_LEN] = {0};
+
+ if (multiresponse_cmd == -1)
+ return;
+
+ /* Call handler to obtain next response */
+ fastboot_multiresponse(multiresponse_cmd, response);
+ fastboot_tx_write_str(response);
+
+ /* If response is final OKAY/FAIL response disconnect this handler and unset cmd */
+ if (!strncmp("OKAY", response, 4) || !strncmp("FAIL", response, 4)) {
+ multiresponse_cmd = -1;
+ fastboot_func->in_req->complete = fastboot_complete;
+ }
+}
+
static void do_acmd_complete(struct usb_ep *ep, struct usb_request *req)
{
/* When usb dequeue complete will be called
@@ -524,6 +543,16 @@
fastboot_fail("buffer overflow", response);
}
+ if (!strncmp(FASTBOOT_MULTIRESPONSE_START, response, 4)) {
+ multiresponse_cmd = cmd;
+ fastboot_multiresponse(multiresponse_cmd, response);
+
+ /* Only add complete callback if first is not a final OKAY/FAIL response */
+ if (strncmp("OKAY", response, 4) && strncmp("FAIL", response, 4)) {
+ fastboot_func->in_req->complete = multiresponse_on_complete;
+ }
+ }
+
if (!strncmp("DATA", response, 4)) {
req->complete = rx_handler_dl_image;
req->length = rx_bytes_expected(ep);