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cuda.c: implement dummy IIC access commands 

These are used by MacOS 9 on boot. Here we return an error except for 4-byte
commands which write to the IIC bus in a similar manner to MOL.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Mark Cave-Ayland 2015-11-11 22:49:45 +00:00 committed by David Gibson
parent f1f46f74a9
commit ce8d3b647b
1 changed files with 18 additions and 0 deletions
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18
hw/misc/macio/cuda.c
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@ -529,6 +529,24 @@ static void cuda_receive_packet(CUDAState *s,
cuda_send_packet_to_host(s, obuf, 3);
qemu_system_reset_request();
break;
case CUDA_COMBINED_FORMAT_IIC:
obuf[0] = ERROR_PACKET;
obuf[1] = 0x5;
obuf[2] = CUDA_PACKET;
obuf[3] = data[0];
cuda_send_packet_to_host(s, obuf, 4);
break;
case CUDA_GET_SET_IIC:
if (len == 4) {
cuda_send_packet_to_host(s, obuf, 3);
} else {
obuf[0] = ERROR_PACKET;
obuf[1] = 0x2;
obuf[2] = CUDA_PACKET;
obuf[3] = data[0];
cuda_send_packet_to_host(s, obuf, 4);
}
break;
default:
break;
}