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usb: musb: cppi41: Enable in device-TX mode

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Since the musb-gadget code now calls the dma engine properly it is
possible to enable it for the TX path in device mode.
AM335x Advisory 1.0.13 says that we may lose the toggle bit on multiple
RX transfers. There is a workaround in host mode but none in device mode
and therefore RX transfers are disabled.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior 2013-08-13 19:38:24 +02:00 committed by Felipe Balbi
parent fc52575145
commit 13266fea59
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/musb/musb_cppi41.c
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@ -362,6 +362,9 @@ static int cppi41_is_compatible(struct dma_channel *channel, u16 maxpacket,
WARN_ON(1);
return 1;
}
if (cppi41_channel->is_tx)
return 1;
/* AM335x Advisory 1.0.13. No workaround for device RX mode */
return 0;
}