diff options
| author | George Cherian <george.cherian@ti.com> | 2014-01-27 15:07:25 +0530 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-02-18 09:25:56 -0600 |
| commit | f82503f549c70c15e283511270e6713a912fef37 (patch) | |
| tree | 16fbdffe847b886a010fe940c3d2ef208b5fd894 /drivers/usb/musb | |
| parent | c57c41d2c6a1fdb3cfecb5edcee386d5db67ac02 (diff) | |
usb: musb: musb_cppi41: Make CPPI aware of high bandwidth transfers
Enable CPPI to handle high bandwidth transfers, especially to support
webcam captures. Use a single bd to get the whole of the data in case of
high bandwidth transfers.
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_cppi41.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index f88929609bac..39ee516c8cbf 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -448,12 +448,25 @@ static int cppi41_dma_channel_program(struct dma_channel *channel, dma_addr_t dma_addr, u32 len) { int ret; + struct cppi41_dma_channel *cppi41_channel = channel->private_data; + int hb_mult = 0; BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN || channel->status == MUSB_DMA_STATUS_BUSY); + if (is_host_active(cppi41_channel->controller->musb)) { + if (cppi41_channel->is_tx) + hb_mult = cppi41_channel->hw_ep->out_qh->hb_mult; + else + hb_mult = cppi41_channel->hw_ep->in_qh->hb_mult; + } + channel->status = MUSB_DMA_STATUS_BUSY; channel->actual_len = 0; + + if (hb_mult) + packet_sz = hb_mult * (packet_sz & 0x7FF); + ret = cppi41_configure_channel(channel, packet_sz, mode, dma_addr, len); if (!ret) channel->status = MUSB_DMA_STATUS_FREE; |