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musb_gadget: suppress "parasitic" TX interrupts with CPPI
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>
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@ -349,7 +349,8 @@ static void txstate(struct musb *musb, struct musb_request *req)
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#elif defined(CONFIG_USB_TI_CPPI_DMA)
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/* program endpoint CSR first, then setup DMA */
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csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY);
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csr |= MUSB_TXCSR_MODE | MUSB_TXCSR_DMAENAB;
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csr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE |
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MUSB_TXCSR_MODE;
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musb_writew(epio, MUSB_TXCSR,
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(MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN)
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| csr);
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