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/* -*-linux-c-*-
*
* vendor-specific code for SCSI CD-ROM's goes here.
*
* This is needed becauce most of the new features (multisession and
* the like) are to new to be included into the SCSI-II standard (to
* be exact: there is'nt anything in my draft copy).
*
* Aug 1997: Ha! Got a SCSI-3 cdrom spec across my fingers. SCSI-3 does
* multisession using the READ TOC command (like SONY).
*
* Rearranged stuff here: SCSI-3 is included allways, support
* for NEC/TOSHIBA/HP commands is optional.
*
* Gerd Knorr <kraxel@cs.tu-berlin.de>
*
* --------------------------------------------------------------------------
*
* support for XA/multisession-CD's
*
* - NEC: Detection and support of multisession CD's.
*
* - TOSHIBA: Detection and support of multisession CD's.
* Some XA-Sector tweaking, required for older drives.
*
* - SONY: Detection and support of multisession CD's.
* added by Thomas Quinot <thomas@cuivre.freenix.fr>
*
* - PIONEER, HITACHI, PLEXTOR, MATSHITA, TEAC, PHILIPS: known to
* work with SONY (SCSI3 now) code.
*
* - HP: Much like SONY, but a little different... (Thomas)
* HP-Writers only ??? Maybe other CD-Writers work with this too ?
* HP 6020 writers now supported.
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include <scsi/scsi_ioctl.h>
#include <linux/cdrom.h>
#include <linux/ucdrom.h>
#include "sr.h"
#if 0
# define DEBUG
#endif
/* here are some constants to sort the vendors into groups */
#define VENDOR_SCSI3 1 /* default: scsi-3 mmc */
#define VENDOR_NEC 2
#define VENDOR_TOSHIBA 3
#define VENDOR_HP_4020 4 /* HP 4xxx writers, others too ?? */
#define VENDOR_HP_6020 5 /* HP 6020 writers */
#define VENDOR_ID (scsi_CDs[minor].vendor)
void
sr_vendor_init(int minor)
{
#ifndef CONFIG_BLK_DEV_SR_VENDOR
VENDOR_ID = VENDOR_SCSI3;
#else
char *vendor = scsi_CDs[minor].device->vendor;
char *model = scsi_CDs[minor].device->model;
/* default */
VENDOR_ID = VENDOR_SCSI3;
if ((!strncmp(vendor,"HP",2) || !strncmp(vendor,"PHILIPS",7)) &&
scsi_CDs[minor].device->type == TYPE_WORM) {
if (!strncmp(model,"CD-Writer 6020",14))
VENDOR_ID = VENDOR_HP_6020;
else
VENDOR_ID = VENDOR_HP_4020;
} else if (!strncmp (vendor, "NEC", 3)) {
VENDOR_ID = VENDOR_NEC;
if (!strncmp (model,"CD-ROM DRIVE:25", 15) ||
!strncmp (model,"CD-ROM DRIVE:36", 15) ||
!strncmp (model,"CD-ROM DRIVE:83", 15) ||
!strncmp (model,"CD-ROM DRIVE:84 ",16))
/* these can't handle multisession, may hang */
scsi_CDs[minor].cdi.mask |= CDC_MULTI_SESSION;
} else if (!strncmp (vendor, "TOSHIBA", 7)) {
VENDOR_ID = VENDOR_TOSHIBA;
}
#endif
}
/* small handy function for switching block length using MODE SELECT,
* used by sr_read_sector() */
int
sr_set_blocklength(int minor, int blocklength)
{
unsigned char *buffer; /* the buffer for the ioctl */
unsigned char cmd[12]; /* the scsi-command */
struct ccs_modesel_head *modesel;
int rc,density = 0;
#ifdef CONFIG_BLK_DEV_SR_VENDOR
if (VENDOR_ID == VENDOR_TOSHIBA)
density = (blocklength > 2048) ? 0x81 : 0x83;
#endif
buffer = (unsigned char *) scsi_malloc(512);
if (!buffer) return -ENOMEM;
#ifdef DEBUG
printk("sr%d: MODE SELECT 0x%x/%d\n",minor,density,blocklength);
#endif
memset(cmd,0,12);
cmd[0] = MODE_SELECT;
cmd[1] = (scsi_CDs[minor].device->lun << 5) | (1 << 4);
cmd[4] = 12;
modesel = (struct ccs_modesel_head*)buffer;
memset(modesel,0,sizeof(*modesel));
modesel->block_desc_length = 0x08;
modesel->density = density;
modesel->block_length_med = (blocklength >> 8 ) & 0xff;
modesel->block_length_lo = blocklength & 0xff;
if (0 == (rc = sr_do_ioctl(minor, cmd, buffer, sizeof(*modesel), 0)))
scsi_CDs[minor].sector_size = blocklength;
#ifdef DEBUG
else
printk("sr%d: switching blocklength to %d bytes failed\n",
minor,blocklength);
#endif
scsi_free(buffer, 512);
return rc;
}
/* This function gets called after a media change. Checks if the CD is
multisession, asks for offset etc. */
#define BCD_TO_BIN(x) ((((int)x & 0xf0) >> 4)*10 + ((int)x & 0x0f))
int sr_cd_check(struct cdrom_device_info *cdi)
{
unsigned long sector,min,sec,frame;
unsigned char *buffer; /* the buffer for the ioctl */
unsigned char cmd[12]; /* the scsi-command */
int rc,is_xa,no_multi,minor;
minor = MINOR(cdi->dev);
if (scsi_CDs[minor].cdi.mask & CDC_MULTI_SESSION)
return 0;
buffer = (unsigned char *) scsi_malloc(512);
if(!buffer) return -ENOMEM;
sector = 0; /* the multisession sector offset goes here */
is_xa = 0; /* flag: the CD uses XA-Sectors */
no_multi = 0; /* flag: the drive can't handle multisession */
rc = 0;
switch(VENDOR_ID) {
case VENDOR_SCSI3:
memset(cmd,0,12);
cmd[0] = READ_TOC;
cmd[1] = (scsi_CDs[minor].device->lun << 5);
cmd[8] = 12;
cmd[9] = 0x40;
rc = sr_do_ioctl(minor, cmd, buffer, 12, 0);
if (rc != 0)
break;
if ((buffer[0] << 8) + buffer[1] < 0x0a) {
printk(KERN_INFO "sr%d: Hmm, seems the drive "
"doesn't support multisession CD's\n",minor);
no_multi = 1;
break;
}
sector = buffer[11] + (buffer[10] << 8) +
(buffer[9] << 16) + (buffer[8] << 24);
if (buffer[6] <= 1) {
/* ignore sector offsets from first track */
sector = 0;
}
break;
#ifdef CONFIG_BLK_DEV_SR_VENDOR
case VENDOR_NEC:
memset(cmd,0,12);
cmd[0] = 0xde;
cmd[1] = (scsi_CDs[minor].device->lun << 5) | 0x03;
cmd[2] = 0xb0;
rc = sr_do_ioctl(minor, cmd, buffer, 0x16, 0);
if (rc != 0)
break;
if (buffer[14] != 0 && buffer[14] != 0xb0) {
printk(KERN_INFO "sr%d: Hmm, seems the cdrom "
"doesn't support multisession CD's\n",minor);
no_multi = 1;
break;
}
min = BCD_TO_BIN(buffer[15]);
sec = BCD_TO_BIN(buffer[16]);
frame = BCD_TO_BIN(buffer[17]);
sector = min*CD_SECS*CD_FRAMES + sec*CD_FRAMES + frame;
break;
case VENDOR_TOSHIBA:
/* we request some disc information (is it a XA-CD ?,
* where starts the last session ?) */
memset(cmd,0,12);
cmd[0] = 0xc7;
cmd[1] = (scsi_CDs[minor].device->lun << 5) | 3;
rc = sr_do_ioctl(minor, cmd, buffer, 4, 0);
if (rc == -EINVAL) {
printk(KERN_INFO "sr%d: Hmm, seems the drive "
"doesn't support multisession CD's\n",minor);
no_multi = 1;
break;
}
if (rc != 0)
break;
min = BCD_TO_BIN(buffer[1]);
sec = BCD_TO_BIN(buffer[2]);
frame = BCD_TO_BIN(buffer[3]);
sector = min*CD_SECS*CD_FRAMES + sec*CD_FRAMES + frame;
if (sector)
sector -= CD_BLOCK_OFFSET;
break;
case VENDOR_HP_4020:
/* Fallthrough */
case VENDOR_HP_6020:
cmd[0] = READ_TOC;
cmd[1] = (scsi_CDs[minor].device->lun << 5);
cmd[8] = (VENDOR_ID == VENDOR_HP_4020) ?
0x04 : 0x0c;
cmd[9] = 0x40;
rc = sr_do_ioctl(minor, cmd, buffer,
(VENDOR_ID == VENDOR_HP_4020) ? 0x04 : 0x0c, 0);
if (rc != 0) {
break;
}
if ((rc = buffer[2]) == 0) {
printk (KERN_WARNING
"sr%d: No finished session\n",minor);
break;
}
if (VENDOR_ID == VENDOR_HP_4020) {
cmd[0] = READ_TOC; /* Read TOC */
cmd[1] = (scsi_CDs[minor].device->lun << 5);
cmd[6] = rc & 0x7f; /* number of last session */
cmd[8] = 0x0c;
cmd[9] = 0x40;
rc = sr_do_ioctl(minor, cmd, buffer, 12, 0);
if (rc != 0) {
break;
}
}
sector = buffer[11] + (buffer[10] << 8) +
(buffer[9] << 16) + (buffer[8] << 24);
break;
#endif /* CONFIG_BLK_DEV_SR_VENDOR */
default:
/* should not happen */
printk(KERN_WARNING
"sr%d: unknown vendor code (%i), not initialized ?\n",
minor,VENDOR_ID);
sector = 0;
no_multi = 1;
break;
}
scsi_CDs[minor].ms_offset = sector;
scsi_CDs[minor].xa_flag = 0;
if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(minor))
scsi_CDs[minor].xa_flag = 1;
if (2048 != scsi_CDs[minor].sector_size)
sr_set_blocklength(minor,2048);
if (no_multi)
cdi->mask |= CDC_MULTI_SESSION;
#ifdef DEBUG
if (sector)
printk(KERN_DEBUG "sr%d: multisession offset=%lu\n",
minor,sector);
#endif
scsi_free(buffer, 512);
return rc;
}
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