I'm experiencing an issue when loading a generic distro initramfs
on trimslice-pro (with ssd using usb-ehci) with the default value of
65535 for USB_MAX_XFER_BLK
EHCI timed out on TD - token=0x80008d80
As adviced by Marek on IRC, using a lower value for
USB_MAX_XFER_BLK allows to load the file
Tested values on tegra20-trimslice:
4095 ok
32767 ok
32768 timeout
36864 timeout
40960 timeout
49150 timeout
v2:
- Allow to override if undefined when using CONFIG_USB_EHCI
- Only change the value for trimslice
- Update description
Signed-off-by: Nicolas Chauvet <kwiz...@gmail.com>
---
common/usb_storage.c | 2 ++
include/configs/trimslice.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/common/usb_storage.c b/common/usb_storage.c
index 7e6e52d..aea0477 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -106,7 +106,9 @@ struct us_data {
* enough free heap space left, but the SCSI READ(10) and WRITE(10) commands
are
* limited to 65535 blocks.
*/
+#ifndef USB_MAX_XFER_BLK /* Allows a quirk for broken devices */
#define USB_MAX_XFER_BLK 65535
+#endif
#else
#define USB_MAX_XFER_BLK 20
#endif
diff --git a/include/configs/trimslice.h b/include/configs/trimslice.h
index b761640..3a2fe87 100644
--- a/include/configs/trimslice.h
+++ b/include/configs/trimslice.h
@@ -43,6 +43,8 @@
#define CONFIG_USB_EHCI
#define CONFIG_USB_EHCI_TEGRA
#define CONFIG_USB_STORAGE
+/* Quirk for broken usb-ehci on trimslice */
+#define USB_MAX_XFER_BLK 32767
/* USB networking support */
#define CONFIG_USB_HOST_ETHER
--
2.4.11
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