sonypi_call2
sonypi_call2(0x81, 0xff);
sonypi_call2(0x81, 0); /* make sure we don't get any more events */
v1 = sonypi_call2(0x8f, fn);
v2 = sonypi_call2(0x8f, fn);
v = sonypi_call2(0x8f, SONYPI_CAMERA_STATUS);
sonypi_call2(0x91, 0);
while (sonypi_call2(0x91, 0x1))
sonypi_call2(0x96, state);