From: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Since we can't work around anomaly 05000380, throw a build error up and instruct the user to use a different mode. Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx> Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx> Signed-off-by: Anand Gadiyar <gadiyar@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx> --- drivers/usb/musb/blackfin.h | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/drivers/usb/musb/blackfin.h b/drivers/usb/musb/blackfin.h index b49a362..10b7d75 100644 --- a/drivers/usb/musb/blackfin.h +++ b/drivers/usb/musb/blackfin.h @@ -41,6 +41,16 @@ * anomaly - 05000465. */ +/* The Mentor USB DMA engine on BF52x (silicon v0.0 and v0.1) seems to be + * unstable in host mode. This may be caused by Anomaly 05000380. After + * digging out the root cause, we will change this number accordingly. + * So, need to either use silicon v0.2+ or disable DMA mode in MUSB. + */ +#if ANOMALY_05000380 && defined(CONFIG_BF52x) && \ + defined(CONFIG_USB_MUSB_HDRC) && !defined(CONFIG_MUSB_PIO_ONLY) +# error "Please use PIO mode in MUSB driver on bf52x chip v0.0 and v0.1" +#endif + #undef DUMP_FIFO_DATA #ifdef DUMP_FIFO_DATA static void dump_fifo_data(u8 *buf, u16 len) -- 1.6.5.5 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
