From 9720faec51127d35f8bf1bdf577de92728d5e91b Mon Sep 17 00:00:00 2001 From: Sonic Zhang Date: Mon, 16 Nov 2009 16:19:24 +0530 Subject: [PATCH] USB: musb: add work around for Blackfin anomaly 05000456 Only allow USE_MODE1 when the Blackfin part is not affected by anomaly 05000456 (USB Receive Interrupt Is Not Generated in DMA Mode 1) since we can't support the mode in that case. Signed-off-by: Sonic Zhang Signed-off-by: Cliff Cai Signed-off-by: Mike Frysinger Signed-off-by: Anand Gadiyar Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_dma.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/usb/musb/musb_dma.h b/drivers/usb/musb/musb_dma.h index 0a2c4e3602c1..916065ba9e70 100644 --- a/drivers/usb/musb/musb_dma.h +++ b/drivers/usb/musb/musb_dma.h @@ -80,6 +80,17 @@ struct musb_hw_ep; #define tusb_dma_omap() 0 #endif +/* Anomaly 05000456 - USB Receive Interrupt Is Not Generated in DMA Mode 1 + * Only allow DMA mode 1 to be used when the USB will actually generate the + * interrupts we expect. + */ +#ifdef CONFIG_BLACKFIN +# undef USE_MODE1 +# if !ANOMALY_05000456 +# define USE_MODE1 +# endif +#endif + /* * DMA channel status ... updated by the dma controller driver whenever that * status changes, and protected by the overall controller spinlock. -- 2.30.2