linux-imx

// SPDX-License-Identifier: GPL-2.0

/* -*-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 too 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/cdrom.h>

#include <linux/errno.h>

#include <linux/string.h>

#include <linux/bcd.h>

#include <linux/blkdev.h>

#include <linux/slab.h>

​

#include <scsi/scsi.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_ioctl.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_WRITER          4    /* pre-scsi3 writers */

​

#define VENDOR_TIMEOUT  30*HZ

​

void sr_vendor_init(Scsi_CD *cd)

{

#ifndef CONFIG_BLK_DEV_SR_VENDOR

    cd->vendor = VENDOR_SCSI3;

#else

    const char *vendor = cd->device->vendor;

    const char *model = cd->device->model;

    /* default */

    cd->vendor = VENDOR_SCSI3;

    if (cd->readcd_known)

        /* this is true for scsi3/mmc drives - no more checks */

        return;

​

    if (cd->device->type == TYPE_WORM) {

        cd->vendor = VENDOR_WRITER;

​

    } else if (!strncmp(vendor, "NEC", 3)) {

        cd->vendor = 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)

#if 0

        /* my NEC 3x returns the read-raw data if a read-raw

           is followed by a read for the same sector - aeb */