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musb_gadget: suppress "parasitic" TX interrupts with CPPI

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Suppress "parasitic" endpoint interrupts in the DMA mode
when using CPPI DMA driver; they're caused by the MUSB gadget
driver using the DMA request mode 0 instead of the mode 1.

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>
This commit is contained in:
Sergei Shtylyov
2009-03-27 12:53:32 -07:00
committed by Greg Kroah-Hartman
parent a5073b5283
commit 37e3ee9910
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/musb/musb_gadget.c
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@@ -349,7 +349,8 @@ static void txstate(struct musb *musb, struct musb_request *req)
#elif defined(CONFIG_USB_TI_CPPI_DMA) #elif defined(CONFIG_USB_TI_CPPI_DMA)
/* program endpoint CSR first, then setup DMA */ /* program endpoint CSR first, then setup DMA */
csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY); csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY);
csr |= MUSB_TXCSR_MODE | MUSB_TXCSR_DMAENAB; csr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE |
MUSB_TXCSR_MODE;
musb_writew(epio, MUSB_TXCSR, musb_writew(epio, MUSB_TXCSR,
(MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN) (MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN)
| csr); | csr);