@@ -483,7 +483,7 @@ da8xx_dma_controller_create(struct musb *musb, void __iomem *base)
#endif
static const struct musb_platform_ops da8xx_ops = {
- .quirks = MUSB_INDEXED_EP | MUSB_DMA_CPPI41,
+ .quirks = MUSB_INDEXED_EP | MUSB_DMA_CPPI41 | MUSB_DA8XX,
.init = da8xx_musb_init,
.exit = da8xx_musb_exit,
@@ -172,6 +172,7 @@ struct musb_io;
*/
struct musb_platform_ops {
+#define MUSB_DA8XX BIT(7)
#define MUSB_DMA_UX500 BIT(6)
#define MUSB_DMA_CPPI41 BIT(5)
#define MUSB_DMA_CPPI BIT(4)
@@ -552,6 +552,10 @@ static int cppi41_dma_channel_abort(struct dma_channel *channel)
}
}
+ /* DA8xx Advisory 2.3.27: wait 250 ms before to start the teardown */
+ if (musb->io.quirks & MUSB_DA8XX)
+ mdelay(250);
+
tdbit = 1 << cppi41_channel->port_num;
if (is_tx)
tdbit <<= 16;
The DMA may hang up if a teardown is initiated while an endpoint is still active (Advisory 2.3.27 of DA8xx errata). To workaround this issue, add a delay before to initiate the teardown. Signed-off-by: Alexandre Bailon <abailon@baylibre.com> --- drivers/usb/musb/da8xx.c | 2 +- drivers/usb/musb/musb_core.h | 1 + drivers/usb/musb/musb_cppi41.c | 4 ++++ 3 files changed, 6 insertions(+), 1 deletion(-) -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html