From: Anand Gadiyar <[EMAIL PROTECTED]>
If Indexed Mode register accesses are enabled, the ep0_rxstate()
function calls musb_g_ep0_giveback() before writing to the CSR
register. When control returns to this ep0_rxstate, the index
register contents are over-written. This causes the CSR register
write to fail.
Fixed by writing the correct value into the index register before
writing to the CSR.
This was observed only in ep0_rxstate() with g_ether loaded and
the device connected to a MS Windows host PC. Anticipatively fixed
ep0_txstate() as well.
Signed-off-by: Anand Gadiyar <[EMAIL PROTECTED]>
---
Fixed my mailer finally. :)
drivers/usb/musb/musb_gadget_ep0.c | 2 ++
1 files changed, 2 insertions(+)
Index: linux-omap-2.6/drivers/usb/musb/musb_gadget_ep0.c
===================================================================
--- linux-omap-2.6.orig/drivers/usb/musb/musb_gadget_ep0.c 2008-04-14
15:36:38.000000000 +0530
+++ linux-omap-2.6/drivers/usb/musb/musb_gadget_ep0.c 2008-08-21
18:12:11.688711634 +0530
@@ -476,6 +476,7 @@ static void ep0_rxstate(struct musb *mus
return;
musb->ackpend = 0;
}
+ musb_ep_select(musb->mregs, 0);
musb_writew(regs, MUSB_CSR0, tmp);
}
@@ -528,6 +529,7 @@ static void ep0_txstate(struct musb *mus
}
/* send it out, triggering a "txpktrdy cleared" irq */
+ musb_ep_select(musb->mregs, 0);
musb_writew(regs, MUSB_CSR0, csr);
}
--
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