On Thu, Sep 09, 2010 at 05:43:49AM -0500, Anil Shetty wrote:
Add support for MUSB Host DMA transfers greater than MUSBHSDMA max
channel length, so that transfers greater than max channel length
wont be truncated.
Signed-off-by: Anil Shetty <anil@xxxxxx>
Cc: Felipe Balbi <me@xxxxxxxxxxxxxxx>
balbi@xxxxxx
@@ -1118,6 +1118,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
u32 status = 0;
void __iomem *mbase = musb->mregs;
struct dma_channel *dma;
+ bool transfer_pending = false;
musb_ep_select(mbase, epnum);
tx_csr = musb_readw(epio, MUSB_TXCSR);
@@ -1278,7 +1279,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
offset = d->offset;
length = d->length;
}
- } else if (dma) {
+ } else if (dma && (urb->transfer_buffer_length == qh->offset)) {
done = true;
} else {
/* see if we need to send more data, or ZLP */
@@ -1291,6 +1292,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
if (!done) {
offset = qh->offset;
length = urb->transfer_buffer_length - offset;
+ transfer_pending = true;
}
}
}
@@ -1310,7 +1312,11 @@ void musb_host_tx(struct musb *musb, u8 epnum)
urb->actual_length = qh->offset;
musb_advance_schedule(musb, urb, hw_ep, USB_DIR_OUT);
return;
- } else if (usb_pipeisoc(pipe) && dma) {
+ } else if (transfer_pending && dma) {
+ if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
+ offset, length))
+ return;
+ } else if (usb_pipeisoc(pipe) && dma) {
if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
offset, length)) {
if (is_cppi_enabled() || tusb_dma_omap())
unfortunately, I don't have currently how to test this patch, so it'll
be waiting a bit :-s sorry.
--
balbi
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