diff options
Diffstat (limited to 'drivers/usb/musb')
-rw-r--r-- | drivers/usb/musb/musb_host.c | 61 |
1 files changed, 44 insertions, 17 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index a81b446..bf725f0 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -1533,6 +1533,44 @@ done: MUSB_TXCSR_H_WZC_BITS | MUSB_TXCSR_TXPKTRDY); } +#ifdef CONFIG_USB_TI_CPPI41_DMA +/* Seems to set up ISO for cppi41 and not advance len. See commit c57c41d */ +static int musb_rx_dma_iso_cppi41(struct dma_controller *dma, + struct musb_hw_ep *hw_ep, + struct musb_qh *qh, + struct urb *urb, + size_t len) +{ + struct dma_channel *channel = hw_ep->tx_channel; + void __iomem *epio = hw_ep->regs; + dma_addr_t *buf; + u32 length, res; + u16 val; + + buf = (void *)urb->iso_frame_desc[qh->iso_idx].offset + + (u32)urb->transfer_dma; + + length = urb->iso_frame_desc[qh->iso_idx].length; + + val = musb_readw(epio, MUSB_RXCSR); + val |= MUSB_RXCSR_DMAENAB; + musb_writew(hw_ep->regs, MUSB_RXCSR, val); + + res = dma->channel_program(channel, qh->maxpacket, 0, + (u32)buf, length); + + return res; +} +#else +static inline int musb_rx_dma_iso_cppi41(struct dma_controller *dma, + struct musb_hw_ep *hw_ep, + struct musb_qh *qh, + struct urb *urb, + size_t len) +{ + return false; +} +#endif #ifdef CONFIG_USB_INVENTRA_DMA @@ -1746,25 +1784,14 @@ void musb_host_rx(struct musb *musb, u8 epnum) if (++qh->iso_idx >= urb->number_of_packets) { done = true; } else { -#if defined(CONFIG_USB_TI_CPPI41_DMA) - struct dma_controller *c; - dma_addr_t *buf; - u32 length, ret; + struct dma_controller *c = musb->dma_controller; - c = musb->dma_controller; - buf = (void *) - urb->iso_frame_desc[qh->iso_idx].offset - + (u32)urb->transfer_dma; + /* REVISIT: Why ignore return value here? */ + if (musb_dma_cppi41(musb)) + done = musb_rx_dma_iso_cppi41(c, hw_ep, + qh, urb, + xfer_len); - length = - urb->iso_frame_desc[qh->iso_idx].length; - - val |= MUSB_RXCSR_DMAENAB; - musb_writew(hw_ep->regs, MUSB_RXCSR, val); - - ret = c->channel_program(dma, qh->maxpacket, - 0, (u32) buf, length); -#endif done = false; } |