Hi,
2010/8/10 Mike Frysinger vapier@gentoo.org:
On Tue, Aug 10, 2010 at 6:26 AM, Sergei Shtylyov wrote:
Mike Frysinger wrote:
--- a/drivers/usb/musb/musb_hcd.c +++ b/drivers/usb/musb/musb_hcd.c } else {
- if (!toggle)
- writew(MUSB_RXCSR_CLRDATATOG, &musbr->rxcsr);
- else {
- if (!toggle) {
- csr = readw(&musbr->txcsr);
- if (csr & MUSB_TXCSR_MODE)
- csr = MUSB_RXCSR_CLRDATATOG;
Clearing RXCSR when FIFO is in TX mode?
unless i missed something, that is what Linux is doing.
Can Linux be wrong too?
musb_host.c:musb_rx_reinit() csr = musb_readw(ep->regs, MUSB_RXCSR); if (csr & MUSB_RXCSR_RXPKTRDY) WARNING("rx%d, packet/%d ready?\n", ep->epnum, musb_readw(ep->regs, MUSB_RXCOUNT));
csr = musb_readw(ep->regs, MUSB_TXCSR); if (csr & MUSB_TXCSR_MODE) musb_h_flush_rxfifo(ep, MUSB_RXCSR_CLRDATATOG); else musb_h_flush_rxfifo(ep, 0);
although i see that i need to also extend the MUSB_TXCSR_MODE define for Blackfin musb ports in u-boot. but this shouldnt affect non-Blackfin musb ports. i'll send a sep patch for that. -mike
Sergei, do you agree that I apply this patch?
Kind regards,
Remy