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cdrom_read_toc support (Blue Swirl)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1693 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-12-05 20:30:36 +00:00
parent 227671c93b
commit b9788fc4c4
1 changed files with 182 additions and 0 deletions
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182
hw/esp.c
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@ -75,6 +75,148 @@ typedef struct ESPState {
#define SEQ_0 0x0
#define SEQ_CD 0x4
/* XXX: stolen from ide.c, move to common ATAPI/SCSI library */
static void lba_to_msf(uint8_t *buf, int lba)
{
lba += 150;
buf[0] = (lba / 75) / 60;
buf[1] = (lba / 75) % 60;
buf[2] = lba % 75;
}
static inline void cpu_to_ube16(uint8_t *buf, int val)
{
buf[0] = val >> 8;
buf[1] = val;
}
static inline void cpu_to_ube32(uint8_t *buf, unsigned int val)
{
buf[0] = val >> 24;
buf[1] = val >> 16;
buf[2] = val >> 8;
buf[3] = val;
}
/* same toc as bochs. Return -1 if error or the toc length */
/* XXX: check this */
static int cdrom_read_toc(int nb_sectors, uint8_t *buf, int msf, int start_track)
{
uint8_t *q;
int len;
if (start_track > 1 && start_track != 0xaa)
return -1;
q = buf + 2;
*q++ = 1; /* first session */
*q++ = 1; /* last session */
if (start_track <= 1) {
*q++ = 0; /* reserved */
*q++ = 0x14; /* ADR, control */
*q++ = 1; /* track number */
*q++ = 0; /* reserved */
if (msf) {
*q++ = 0; /* reserved */
lba_to_msf(q, 0);
q += 3;
} else {
/* sector 0 */
cpu_to_ube32(q, 0);
q += 4;
}
}
/* lead out track */
*q++ = 0; /* reserved */
*q++ = 0x16; /* ADR, control */
*q++ = 0xaa; /* track number */
*q++ = 0; /* reserved */
if (msf) {
*q++ = 0; /* reserved */
lba_to_msf(q, nb_sectors);
q += 3;
} else {
cpu_to_ube32(q, nb_sectors);
q += 4;
}
len = q - buf;
cpu_to_ube16(buf, len - 2);
return len;
}
/* mostly same info as PearPc */
static int cdrom_read_toc_raw(int nb_sectors, uint8_t *buf, int msf,
int session_num)
{
uint8_t *q;
int len;
q = buf + 2;
*q++ = 1; /* first session */
*q++ = 1; /* last session */
*q++ = 1; /* session number */
*q++ = 0x14; /* data track */
*q++ = 0; /* track number */
*q++ = 0xa0; /* lead-in */
*q++ = 0; /* min */
*q++ = 0; /* sec */
*q++ = 0; /* frame */
*q++ = 0;
*q++ = 1; /* first track */
*q++ = 0x00; /* disk type */
*q++ = 0x00;
*q++ = 1; /* session number */
*q++ = 0x14; /* data track */
*q++ = 0; /* track number */
*q++ = 0xa1;
*q++ = 0; /* min */
*q++ = 0; /* sec */
*q++ = 0; /* frame */
*q++ = 0;
*q++ = 1; /* last track */
*q++ = 0x00;
*q++ = 0x00;
*q++ = 1; /* session number */
*q++ = 0x14; /* data track */
*q++ = 0; /* track number */
*q++ = 0xa2; /* lead-out */
*q++ = 0; /* min */
*q++ = 0; /* sec */
*q++ = 0; /* frame */
if (msf) {
*q++ = 0; /* reserved */
lba_to_msf(q, nb_sectors);
q += 3;
} else {
cpu_to_ube32(q, nb_sectors);
q += 4;
}
*q++ = 1; /* session number */
*q++ = 0x14; /* ADR, control */
*q++ = 0; /* track number */
*q++ = 1; /* point */
*q++ = 0; /* min */
*q++ = 0; /* sec */
*q++ = 0; /* frame */
if (msf) {
*q++ = 0;
lba_to_msf(q, 0);
q += 3;
} else {
*q++ = 0;
*q++ = 0;
*q++ = 0;
*q++ = 0;
}
len = q - buf;
cpu_to_ube16(buf, len - 2);
return len;
}
static void handle_satn(ESPState *s)
{
uint8_t buf[32];
@ -128,6 +270,7 @@ static void handle_satn(ESPState *s)
memcpy(&s->ti_buf[8], "QEMU ", 8);
s->ti_buf[2] = 1;
s->ti_buf[3] = 2;
s->ti_buf[4] = 32;
s->ti_dir = 1;
s->ti_size = 36;
break;
@ -190,6 +333,45 @@ static void handle_satn(ESPState *s)
s->ti_dir = 0;
break;
}
case 0x43:
{
int start_track, format, msf, len;
msf = buf[2] & 2;
format = buf[3] & 0xf;
start_track = buf[7];
bdrv_get_geometry(s->bd[target], &nb_sectors);
DPRINTF("Read TOC (track %d format %d msf %d)\n", start_track, format, msf >> 1);
switch(format) {
case 0:
len = cdrom_read_toc(nb_sectors, buf, msf, start_track);
if (len < 0)
goto error_cmd;
s->ti_size = len;
break;
case 1:
/* multi session : only a single session defined */
memset(buf, 0, 12);
buf[1] = 0x0a;
buf[2] = 0x01;
buf[3] = 0x01;
s->ti_size = 12;
break;
case 2:
len = cdrom_read_toc_raw(nb_sectors, buf, msf, start_track);
if (len < 0)
goto error_cmd;
s->ti_size = len;
break;
default:
error_cmd:
DPRINTF("Read TOC error\n");
// XXX error handling
break;
}
s->ti_dir = 1;
break;
}
default:
DPRINTF("Unknown SCSI command (%2.2x)\n", buf[1]);
break;