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atapi: implement READ DISC INFORMATION

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This command is not necessary for CD-ROM and DVD-ROM, but some versions of
udev trip on its absence.

Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-05-25 12:59:31 +02:00
parent 27395add75
commit 55042b955b
1 changed files with 31 additions and 0 deletions
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31
hw/ide/atapi.c
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@ -956,6 +956,36 @@ static void cmd_read_cdvd_capacity(IDEState *s, uint8_t* buf)
ide_atapi_cmd_reply(s, 8, 8);
}
static void cmd_read_disc_information(IDEState *s, uint8_t* buf)
{
uint8_t type = buf[1] & 7;
uint32_t max_len = ube16_to_cpu(buf + 7);
/* Types 1/2 are only defined for Blu-Ray. */
if (type != 0) {
ide_atapi_cmd_error(s, ILLEGAL_REQUEST,
ASC_INV_FIELD_IN_CMD_PACKET);
return;
}
memset(buf, 0, 34);
buf[1] = 32;
buf[2] = 0xe; /* last session complete, disc finalized */
buf[3] = 1; /* first track on disc */
buf[4] = 1; /* # of sessions */
buf[5] = 1; /* first track of last session */
buf[6] = 1; /* last track of last session */
buf[7] = 0x20; /* unrestricted use */
buf[8] = 0x00; /* CD-ROM or DVD-ROM */
/* 9-10-11: most significant byte corresponding bytes 4-5-6 */
/* 12-23: not meaningful for CD-ROM or DVD-ROM */
/* 24-31: disc bar code */
/* 32: disc application code */
/* 33: number of OPC tables */
ide_atapi_cmd_reply(s, 34, max_len);
}
static void cmd_read_dvd_structure(IDEState *s, uint8_t* buf)
{
int max_len;
@ -1045,6 +1075,7 @@ static const struct {
[ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY },
[ 0x46 ] = { cmd_get_configuration, ALLOW_UA },
[ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA },
[ 0x51 ] = { cmd_read_disc_information, CHECK_READY },
[ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 },
[ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY },
[ 0xad ] = { cmd_read_dvd_structure, CHECK_READY },