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| author | Ming Lei <tom.leiming@gmail.com> | 2010-09-20 09:32:03 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-09-24 20:05:00 +0200 |
| commit | 490e5fbe8ccb198fb719ae49eaa0c7071273e016 (patch) | |
| tree | 9b87708fce6d0b965d97bf3bda5cc444f19a0c4c /drivers/usb | |
| parent | usb: musb: gadget: fix bulk IN infinit hangs in double buffer case (diff) | |
| download | linux-490e5fbe8ccb198fb719ae49eaa0c7071273e016.tar.xz linux-490e5fbe8ccb198fb719ae49eaa0c7071273e016.zip | |
usb: musb: gadget: enable autoclear for OUT transfer in both DMA 0 and DMA 1
This patch fixes one bugs of OUT transfer in double buffer case:
-the current code only enable autoclear for dma mode 1, and not
for dma mode 0
Without this patch, test #5 of usbtest can't be passed if we
configure musb as g_zero and use fifo mode 3 to enable double
buffer mode.
With this patch and the following patch(fix dma length),
on my beagle B5, test#5(queued bulk out) may go beyond
18Mbyte/s(seems dma mode 0 is quicker in double buffer case)
if musb is configured as g_zero and fifo mode 3 is taken, follows
the test command:
#./testusb -D DEV_NAME -c 1024 -t 5 -s 32768 -g 8 [1]
Also I have tested this patch can't make g_ether broken.
[1],source of testusb : tools/usb/testusb.c under linux kernel;
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index f206c94b8b1c..176e1276dc28 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -643,8 +643,8 @@ static void rxstate(struct musb *musb, struct musb_request *req) */ csr |= MUSB_RXCSR_DMAENAB; -#ifdef USE_MODE1 csr |= MUSB_RXCSR_AUTOCLEAR; +#ifdef USE_MODE1 /* csr |= MUSB_RXCSR_DMAMODE; */ /* this special sequence (enabling and then |