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authorSimon Arlott <simon@fire.lp0.eu>2009-11-21 15:12:21 +0000
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-02 14:52:59 -0800
commitc68bb0d738897ed39b90c7ccb22e01c938117051 (patch)
tree87dc7503d6ff5923e4e68fef45ca61933bc33cc4 /drivers/usb/atm
parent9fc950d322380dda8e9bc8debe89766085e7a0eb (diff)
USB: cxacru: document how to interact with the flash memory
These commands were found by accident... fortunately it still works even if the flash memory is erased, despite having no USB device IDs. Some example sysfs code for raw command access: http://simon.arlott.org/pub/cxacru/raw.c Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/atm')
-rw-r--r--drivers/usb/atm/cxacru.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/usb/atm/cxacru.c b/drivers/usb/atm/cxacru.c
index 4bead3da385..5dc21383aa8 100644
--- a/drivers/usb/atm/cxacru.c
+++ b/drivers/usb/atm/cxacru.c
@@ -105,6 +105,26 @@ enum cxacru_cm_request {
CM_REQUEST_MAX,
};
+/* commands for interaction with the flash memory
+ *
+ * read: response is the contents of the first 60 bytes of flash memory
+ * write: request contains the 60 bytes of data to write to flash memory
+ * response is the contents of the first 60 bytes of flash memory
+ *
+ * layout: PP PP VV VV MM MM MM MM MM MM ?? ?? SS SS SS SS SS SS SS SS
+ * SS SS SS SS SS SS SS SS 00 00 00 00 00 00 00 00 00 00 00 00
+ * 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ *
+ * P: le16 USB Product ID
+ * V: le16 USB Vendor ID
+ * M: be48 MAC Address
+ * S: le16 ASCII Serial Number
+ */
+enum cxacru_cm_flash {
+ CM_FLASH_READ = 0xa1,
+ CM_FLASH_WRITE = 0xa2
+};
+
/* reply codes to the commands above */
enum cxacru_cm_status {
CM_STATUS_UNDEFINED,