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ide: implement stub for audio control/volume read 

This implements the audio control or volume read support as needed by
some systems. A Conectiva Parolin system required this to detect an IDE
device as CD-ROM, through the CDVOLREAD ioctl.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Thadeu Lima de Souza Cascardo 2009-11-30 17:37:03 -02:00 committed by Anthony Liguori
parent a70089ceeb
commit fe0d61231e
1 changed files with 17 additions and 0 deletions
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17
hw/ide/core.c
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@ -1269,6 +1269,23 @@ static void ide_atapi_cmd(IDEState *s)
buf[15] = 0x00;
ide_atapi_cmd_reply(s, 16, max_len);
break;
case GPMODE_AUDIO_CTL_PAGE:
cpu_to_ube16(&buf[0], 24 + 6);
buf[2] = 0x70;
buf[3] = 0;
buf[4] = 0;
buf[5] = 0;
buf[6] = 0;
buf[7] = 0;
/* Fill with CDROM audio volume */
buf[17] = 0;
buf[19] = 0;
buf[21] = 0;
buf[23] = 0;
ide_atapi_cmd_reply(s, 24, max_len);
break;
case GPMODE_CAPABILITIES_PAGE:
cpu_to_ube16(&buf[0], 28 + 6);
buf[2] = 0x70;