From: supriya karanth <supriya.karanth@xxxxxxxxxxxxxx> The "mult" factor is not updated properly for the can_bulk_split() case. The AUTOSET bit in the TXCSR is not being set if the "mult" factor is greater than 1 for the High Bandwidth ISO case. But the "mult" factor is also greater than 1 in case of Full speed bulk transfers with the packet splitting in TXMAXP register enabled with can_bulk_split(). Without the AUTOSET the DMA transfers will not progress in mode1 Signed-off-by: supriya karanth <supriya.karanth@xxxxxxxxxxxxxx> Signed-off-by: Praveena NADAHALLY <praveen.nadahally@xxxxxxxxxxxxxx> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> --- drivers/usb/musb/musb_host.c | 20 ++++++++++++++++---- 1 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 3df6a76..b3e663c 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -634,7 +634,17 @@ static bool musb_tx_dma_program(struct dma_controller *dma, mode = 1; csr |= MUSB_TXCSR_DMAMODE | MUSB_TXCSR_DMAENAB; /* autoset shouldn't be set in high bandwidth */ - if (qh->hb_mult == 1) + /* + * Enable Autoset according to table + * below + * bulk_split hb_mult Autoset_Enable + * 0 1 Yes(Normal) + * 0 >1 No(High BW ISO) + * 1 1 Yes(HS bulk) + * 1 >1 Yes(FS bulk) + */ + if (qh->hb_mult == 1 || (qh->hb_mult > 1 && + can_bulk_split(hw_ep->musb, qh->type))) csr |= MUSB_TXCSR_AUTOSET; } else { mode = 0; @@ -794,10 +804,12 @@ static void musb_ep_program(struct musb *musb, u8 epnum, if (musb->double_buffer_not_ok) musb_writew(epio, MUSB_TXMAXP, hw_ep->max_packet_sz_tx); - else if (can_bulk_split(musb, qh->type)) + else if (can_bulk_split(musb, qh->type)) { + qh->hb_mult = hw_ep->max_packet_sz_tx + / packet_sz; musb_writew(epio, MUSB_TXMAXP, packet_sz - | ((hw_ep->max_packet_sz_tx / - packet_sz) - 1) << 11); + | ((qh->hb_mult) - 1) << 11); + } else musb_writew(epio, MUSB_TXMAXP, qh->maxpacket | -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html