diff options
| author | Harald Welte <laforge@osmocom.org> | 2019-12-14 18:58:58 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@osmocom.org> | 2019-12-14 21:13:37 +0100 |
| commit | 271be9d181d2b351ad75cc5368ebdca46188cd81 (patch) | |
| tree | 0a21d26089cdf7f6ed4d728119da53468a4c26aa | |
| parent | 342a7fe0398640d1e916c619d8ecdff2f7ea87b5 (diff) | |
more comments in host_communication.c.
Change-Id: I8b0124ec96b56b7c89e4c7033a11cc93c4fa2d26
| -rw-r--r-- | firmware/libcommon/source/host_communication.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/firmware/libcommon/source/host_communication.c b/firmware/libcommon/source/host_communication.c index d500aed..1e15ada 100644 --- a/firmware/libcommon/source/host_communication.c +++ b/firmware/libcommon/source/host_communication.c @@ -27,7 +27,7 @@ * USBD Integration API ***********************************************************************/ -/* call-back after (successful?) transfer of a buffer */ +/* call-back after (successful?) transfer of a write buffer on IN EP */ static void usb_write_cb(uint8_t *arg, uint8_t status, uint32_t transferred, uint32_t remaining) { @@ -48,6 +48,7 @@ static void usb_write_cb(uint8_t *arg, uint8_t status, uint32_t transferred, usb_buf_free(msg); } +/* check if the spcified IN endpoint is idle and submit the next buffer from queue */ int usb_refill_to_host(uint8_t ep) { struct usb_buffered_ep *bep = usb_get_buf_ep(ep); @@ -99,7 +100,7 @@ int usb_refill_to_host(uint8_t ep) return 1; } -/* call-back after (successful?) transfer of a buffer */ +/* call-back after (successful?) read transfer of a buffer on OUT EP */ static void usb_read_cb(uint8_t *arg, uint8_t status, uint32_t transferred, uint32_t remaining) { @@ -120,6 +121,7 @@ static void usb_read_cb(uint8_t *arg, uint8_t status, uint32_t transferred, llist_add_tail_irqsafe(&msg->list, &bep->queue); } +/* refill the read queue for data received from host PC on OUT EP, if needed */ int usb_refill_from_host(uint8_t ep) { struct usb_buffered_ep *bep = usb_get_buf_ep(ep); @@ -158,6 +160,7 @@ int usb_refill_from_host(uint8_t ep) return 1; } +/* drain any buffers from the queue of the endpoint and release their memory */ int usb_drain_queue(uint8_t ep) { struct usb_buffered_ep *bep = usb_get_buf_ep(ep); |