Hello.
Mike Frysinger wrote:
From: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
Add some helpful notes about how the driver works around anomaly 05000450
(USB DMA Mode 1 Short Packet Data Corruption).
Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
---
v2
- fixup comment style
- improve contents
drivers/usb/musb/blackfin.h | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/musb/blackfin.h b/drivers/usb/musb/blackfin.h
index 159fdea..3e82059 100644
--- a/drivers/usb/musb/blackfin.h
+++ b/drivers/usb/musb/blackfin.h
@@ -14,6 +14,14 @@
* Blackfin specific definitions
*/
+/*
+ * Anomaly notes:
+ * 05000450 - USB DMA Mode 1 Short Packet Data Corruption:
+ * MUSB driver is designed to transfer buffer of N * maxpacket size
+ * in DMA mode 1 and leave rest data to the next transfer in DMA
+ * mode 0, so we never transmit a short package in DMA mode 1.
s/package/packet/
WBR, Sergei
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