leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

USB: musb: fix ISOC Tx programming for CPPI DMAs

Browse Source 
Isochronous Tx DMA is getting programmed but never getting started
for CPPI and TUSB DMAs and thus Isochronous Tx doesn't work.

Fixing it by starting DMAs using musb_h_tx_dma_start().

Signed-off-by: Swaminathan S <swami.iyer@ti.com>
Signed-off-by: Babu Ravi <ravibabu@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ajay Kumar Gupta 2009-11-17 15:22:55 +05:30 committed by Greg Kroah-Hartman
parent 1230435c25
commit dfeffa531c
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/usb/musb/musb_host.c
View File

@ -1301,8 +1301,11 @@ void musb_host_tx(struct musb *musb, u8 epnum)
return;
} else if (usb_pipeisoc(pipe) && dma) {
if (musb_tx_dma_program(musb->dma_controller, hw_ep, qh, urb,
offset, length))
offset, length)) {
if (is_cppi_enabled() || tusb_dma_omap())
musb_h_tx_dma_start(hw_ep);
return;
}
} else if (tx_csr & MUSB_TXCSR_DMAENAB) {
DBG(1, "not complete, but DMA enabled?\n");
return;