If udc_endpoint_write() was called with bigger payload which does not fit into one USB packet it needs to be transmitted in more USB packets. First packet is transmitted by udc_endpoint_write() call itself and other packets are put into waiting queue.
Implement function musb_peri_tx() which transmit checks when endpoints are ready and continue transmitting of waiting queue.
This patch fixes sending e.g. output of printenv command over usbtty serial console.
Signed-off-by: Pali Rohár pali@kernel.org --- drivers/usb/musb/musb_udc.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/musb/musb_udc.c b/drivers/usb/musb/musb_udc.c index 67d1c56f9a..28719cc3f6 100644 --- a/drivers/usb/musb/musb_udc.c +++ b/drivers/usb/musb/musb_udc.c @@ -708,21 +708,16 @@ static void musb_peri_rx(u16 intr)
static void musb_peri_tx(u16 intr) { + unsigned int ep; + /* Check for EP0 */ if (0x01 & intr) musb_peri_ep0_tx();
- /* - * Use this in the future when handling epN tx - * - * u8 ep; - * - * for (ep = 1; ep < 16; ep++) { - * if ((1 << ep) & intr) { - * / * handle tx for this endpoint * / - * } - * } - */ + for (ep = 1; ep < 16; ep++) { + if ((1 << ep) & intr) + udc_endpoint_write(GET_ENDPOINT(udc_device, ep)); + } }
void udc_irq(void)