diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 5d815049cbaa..ce31f079b31e 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -644,10 +644,8 @@ static void rxstate(struct musb *musb, struct musb_request *req) */ csr |= MUSB_RXCSR_DMAENAB; - if (!musb_ep->hb_mult && - musb_ep->hw_ep->rx_double_buffered) - csr |= MUSB_RXCSR_AUTOCLEAR; #ifdef USE_MODE1 + csr |= MUSB_RXCSR_AUTOCLEAR; /* csr |= MUSB_RXCSR_DMAMODE; */ /* this special sequence (enabling and then @@ -656,6 +654,10 @@ static void rxstate(struct musb *musb, struct musb_request *req) */ musb_writew(epio, MUSB_RXCSR, csr | MUSB_RXCSR_DMAMODE); +#else + if (!musb_ep->hb_mult && + musb_ep->hw_ep->rx_double_buffered) + csr |= MUSB_RXCSR_AUTOCLEAR; #endif musb_writew(epio, MUSB_RXCSR, csr); @@ -807,7 +809,7 @@ void musb_g_rx(struct musb *musb, u8 epnum) #if defined(CONFIG_USB_INVENTRA_DMA) || defined(CONFIG_USB_TUSB_OMAP_DMA) /* Autoclear doesn't clear RxPktRdy for short packets */ - if ((dma->desired_mode == 0) + if ((dma->desired_mode == 0 && !hw_ep->rx_double_buffered) || (dma->actual_len & (musb_ep->packet_sz - 1))) { /* ack the read! */ @@ -818,8 +820,16 @@ void musb_g_rx(struct musb *musb, u8 epnum) /* incomplete, and not short? wait for next IN packet */ if ((request->actual < request->length) && (musb_ep->dma->actual_len - == musb_ep->packet_sz)) + == musb_ep->packet_sz)) { + /* In double buffer case, continue to unload fifo if + * there is Rx packet in FIFO. + **/ + csr = musb_readw(epio, MUSB_RXCSR); + if ((csr & MUSB_RXCSR_RXPKTRDY) && + hw_ep->rx_double_buffered) + goto exit; return; + } #endif musb_g_giveback(musb_ep, request, 0); @@ -827,7 +837,7 @@ void musb_g_rx(struct musb *musb, u8 epnum) if (!request) return; } - +exit: /* Analyze request */ rxstate(musb, to_musb_request(request)); } |
