usb: musb: NAK timeout scheme on bulk TX endpoint

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Fixes endpoint starvation issue when more than one bulk QH is
multiplexed on the reserved bulk TX endpoint.

This patch sets the NAK timeout interval for such QHs, and when
a timeout triggers the next QH will be scheduled.

This scheme doesn't work for devices which are connected to a
high to full speed tree (transaction translator) as there is
no NAK timeout interrupt from the musb controller from such
devices.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

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This commit is contained in:

Ajay Kumar Gupta 2012-07-19 13:41:59 +05:30 • committed by Felipe Balbi

parent 603fe2b21d

commit f283862f3b

1 changed files with 92 additions and 62 deletions

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154

drivers/usb/musb/musb_host.c

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