I am having trouble placing firmware properly on an Android device, I keep getting:
<3>[ 3590.997375] usb 3-1.4: ath9k_htc: Firmware - htc_7010.fw not found
If on a standard linux machine running Ubuntu, I place htc_7010.fw in /lib/firmware then I do not get this error.
However, if I place this firmware in /lib/firmware on Android, I still get the error. I have tried all of the following directories and still receive the error:
/lib/firmware
/etc/firmware
/system/lib/modules
/system/lib/firmware
/system/etc
No such luck... what dictates where the firmware should be, and how could I determine which directories it is scanning for the firmware?
On Android (ICS anyways) it has its own daemon/service (or whatever you want to call it) to manage hotplug events, including firmware requests. In <android>/system/core/init/devices.c
, there are two #define
s that specify locations where firmware will be checked:
#define FIRMWARE_DIR1 "/etc/firmware"
#define FIRMWARE_DIR2 "/vendor/firmware"
On my initial build of the ICS filesystem, /etc/firmware
didn't exist (and the etc directory seems to be a symbolic link created at boot/init time). The directory I had to place firmware in on my NFS mounted rootfs was <mount point>/system/etc/firmware
After doing this, request_firmware() calls from my module successfully completed.