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authorSonic Zhang <sonic.zhang@analog.com>2009-11-16 16:19:27 +0530
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 11:55:24 -0800
commit0702794c41c3740e65ec83d393b7cb4d048be954 (patch)
treee982a1474ad70912116ac85d70b537ff2abc3046 /drivers/usb
parent6bd03e7b9d0f70928f9cd793326c28e4e08ffc96 (diff)
USB: musb: error out when anomaly 05000380 is applicable
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@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Anand Gadiyar <gadiyar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/musb/blackfin.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/musb/blackfin.h b/drivers/usb/musb/blackfin.h
index b49a362fb9f..10b7d7584f4 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)