diff options
| -rw-r--r-- | drivers/usb/musb/blackfin.c | 1 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_core.h | 12 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 12 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 11 |
4 files changed, 28 insertions, 8 deletions
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c index eeba228eb2a..9d49d1cd7ce 100644 --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -404,6 +404,7 @@ static int bfin_musb_init(struct musb *musb) musb->xceiv->set_power = bfin_musb_set_power; musb->isr = blackfin_interrupt; + musb->double_buffer_not_ok = true; return 0; } diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index d0c236f8e19..d74a8113ae7 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -488,6 +488,18 @@ struct musb { unsigned set_address:1; unsigned test_mode:1; unsigned softconnect:1; + /* + * FIXME: Remove this flag. + * + * This is only added to allow Blackfin to work + * with current driver. For some unknown reason + * Blackfin doesn't work with double buffering + * and that's enabled by default. + * + * We added this flag to forcefully disable double + * buffering until we get it working. + */ + unsigned double_buffer_not_ok:1 __deprecated; u8 address; u8 test_mode_nr; diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index ed58c6c8f15..23dad4c8785 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -989,7 +989,11 @@ static int musb_gadget_enable(struct usb_ep *ep, /* Set TXMAXP with the FIFO size of the endpoint * to disable double buffering mode. */ - musb_writew(regs, MUSB_TXMAXP, musb_ep->packet_sz | (musb_ep->hb_mult << 11)); + if (musb->double_buffer_not_ok) + musb_writew(regs, MUSB_TXMAXP, hw_ep->max_packet_sz_tx); + else + musb_writew(regs, MUSB_TXMAXP, musb_ep->packet_sz + | (musb_ep->hb_mult << 11)); csr = MUSB_TXCSR_MODE | MUSB_TXCSR_CLRDATATOG; if (musb_readw(regs, MUSB_TXCSR) @@ -1025,7 +1029,11 @@ static int musb_gadget_enable(struct usb_ep *ep, /* Set RXMAXP with the FIFO size of the endpoint * to disable double buffering mode. */ - musb_writew(regs, MUSB_RXMAXP, musb_ep->packet_sz | (musb_ep->hb_mult << 11)); + if (musb->double_buffer_not_ok) + musb_writew(regs, MUSB_RXMAXP, hw_ep->max_packet_sz_tx); + else + musb_writew(regs, MUSB_RXMAXP, musb_ep->packet_sz + | (musb_ep->hb_mult << 11)); /* force shared fifo to OUT-only mode */ if (hw_ep->is_shared_fifo) { diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 4d5bcb4e14d..0f523d7db57 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -609,7 +609,7 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep) /* Set RXMAXP with the FIFO size of the endpoint * to disable double buffer mode. */ - if (musb->hwvers < MUSB_HWVERS_2000) + if (musb->double_buffer_not_ok) musb_writew(ep->regs, MUSB_RXMAXP, ep->max_packet_sz_rx); else musb_writew(ep->regs, MUSB_RXMAXP, @@ -784,14 +784,13 @@ static void musb_ep_program(struct musb *musb, u8 epnum, /* protocol/endpoint/interval/NAKlimit */ if (epnum) { musb_writeb(epio, MUSB_TXTYPE, qh->type_reg); - if (can_bulk_split(musb, qh->type)) + if (musb->double_buffer_not_ok) musb_writew(epio, MUSB_TXMAXP, - packet_sz - | ((hw_ep->max_packet_sz_tx / - packet_sz) - 1) << 11); + hw_ep->max_packet_sz_tx); else musb_writew(epio, MUSB_TXMAXP, - packet_sz); + qh->maxpacket | + ((qh->hb_mult - 1) << 11)); musb_writeb(epio, MUSB_TXINTERVAL, qh->intv_reg); } else { musb_writeb(epio, MUSB_NAKLIMIT0, qh->intv_reg); |