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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2009-03-27 04:27:47 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2009-04-17 21:50:25 +0400
commitb6e434a5404b9ce8c285ea081b6ea5c523b29db4 (patch)
tree8a1d0aac0692859aeb97931b86bf60314b663567 /scripts
parentc7bbc056a92476b3b3d70a8df7cc746ac5d56de7 (diff)
downloadlinux-b6e434a5404b9ce8c285ea081b6ea5c523b29db4.tar.xz
USB: musb: sanitize clearing TXCSR DMA bits (take 2)
The MUSB code clears TXCSR_DMAMODE incorrectly in several places, either asserting that TXCSR_DMAENAB is clear (when sometimes it isn't) or clearing both bits together. Recent versions of the programmer's guide require DMAENAB to be cleared first, although some older ones didn't. Fix this and while at it: - In musb_gadget::txstate(), stop clearing the AUTOSET and DMAMODE bits for the CPPI case since they never get set anyway (the former bit is reserved on DaVinci); but do clear the DMAENAB bit on the DMA error path. - In musb_host::musb_ep_program(), remove the duplicate DMA controller specific code code clearing the TXCSR previous state, add the code to clear TXCSR DMA bits on the Inventra DMA error path, to replace such code (executed late) on the PIO path. - In musbhsdma::dma_channel_abort()/dma_controller_irq(), add/use the 'offset' variable to avoid MUSB_EP_OFFSET() invocations on every RXCSR/TXCSR access. [dbrownell@users.sourceforge.net: don't introduce CamelCase, shrink diff] Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'scripts')
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