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Release 4.14 drivers/scsi/sr_vendor.c

Directory: drivers/scsi
// 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 */ || !strncmp(model, "CD-ROM DRIVE:500", 16) #endif ) /* these can't handle multisession, may hang */ cd->cdi.mask |= CDC_MULTI_SESSION; } else if (!strncmp(vendor, "TOSHIBA", 7)) { cd->vendor = VENDOR_TOSHIBA; } #endif }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)14783.05%770.00%
Christoph Hellwig179.60%110.00%
Al Viro116.21%110.00%
Matthew Wilcox21.13%110.00%
Total177100.00%10100.00%

/* small handy function for switching block length using MODE SELECT, * used by sr_read_sector() */
int sr_set_blocklength(Scsi_CD *cd, int blocklength) { unsigned char *buffer; /* the buffer for the ioctl */ struct packet_command cgc; struct ccs_modesel_head *modesel; int rc, density = 0; #ifdef CONFIG_BLK_DEV_SR_VENDOR if (cd->vendor == VENDOR_TOSHIBA) density = (blocklength > 2048) ? 0x81 : 0x83; #endif buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); if (!buffer) return -ENOMEM; #ifdef DEBUG sr_printk(KERN_INFO, cd, "MODE SELECT 0x%x/%d\n", density, blocklength); #endif memset(&cgc, 0, sizeof(struct packet_command)); cgc.cmd[0] = MODE_SELECT; cgc.cmd[1] = (1 << 4); cgc.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; cgc.buffer = buffer; cgc.buflen = sizeof(*modesel); cgc.data_direction = DMA_TO_DEVICE; cgc.timeout = VENDOR_TIMEOUT; if (0 == (rc = sr_do_ioctl(cd, &cgc))) { cd->device->sector_size = blocklength; } #ifdef DEBUG else sr_printk(KERN_INFO, cd, "switching blocklength to %d bytes failed\n", blocklength); #endif kfree(buffer); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20474.18%538.46%
Alan Cox4315.64%17.69%
Al Viro103.64%323.08%
Hannes Reinecke82.91%17.69%
Linus Torvalds62.18%17.69%
Christoph Hellwig41.45%215.38%
Total275100.00%13100.00%

/* This function gets called after a media change. Checks if the CD is multisession, asks for offset etc. */
int sr_cd_check(struct cdrom_device_info *cdi) { Scsi_CD *cd = cdi->handle; unsigned long sector; unsigned char *buffer; /* the buffer for the ioctl */ struct packet_command cgc; int rc, no_multi; if (cd->cdi.mask & CDC_MULTI_SESSION) return 0; buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); if (!buffer) return -ENOMEM; sector = 0; /* the multisession sector offset goes here */ no_multi = 0; /* flag: the drive can't handle multisession */ rc = 0; memset(&cgc, 0, sizeof(struct packet_command)); switch (cd->vendor) { case VENDOR_SCSI3: cgc.cmd[0] = READ_TOC; cgc.cmd[8] = 12; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 12; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) break; if ((buffer[0] << 8) + buffer[1] < 0x0a) { sr_printk(KERN_INFO, cd, "Hmm, seems the drive " "doesn't support multisession CD's\n"); 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:{ unsigned long min, sec, frame; cgc.cmd[0] = 0xde; cgc.cmd[1] = 0x03; cgc.cmd[2] = 0xb0; cgc.buffer = buffer; cgc.buflen = 0x16; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) break; if (buffer[14] != 0 && buffer[14] != 0xb0) { sr_printk(KERN_INFO, cd, "Hmm, seems the cdrom " "doesn't support multisession CD's\n"); no_multi = 1; break; } min = bcd2bin(buffer[15]); sec = bcd2bin(buffer[16]); frame = bcd2bin(buffer[17]); sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; break; } case VENDOR_TOSHIBA:{ unsigned long min, sec, frame; /* we request some disc information (is it a XA-CD ?, * where starts the last session ?) */ cgc.cmd[0] = 0xc7; cgc.cmd[1] = 0x03; cgc.buffer = buffer; cgc.buflen = 4; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc == -EINVAL) { sr_printk(KERN_INFO, cd, "Hmm, seems the drive " "doesn't support multisession CD's\n"); no_multi = 1; break; } if (rc != 0) break; min = bcd2bin(buffer[1]); sec = bcd2bin(buffer[2]); frame = bcd2bin(buffer[3]); sector = min * CD_SECS * CD_FRAMES + sec * CD_FRAMES + frame; if (sector) sector -= CD_MSF_OFFSET; sr_set_blocklength(cd, 2048); break; } case VENDOR_WRITER: cgc.cmd[0] = READ_TOC; cgc.cmd[8] = 0x04; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 0x04; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); if (rc != 0) { break; } if ((rc = buffer[2]) == 0) { sr_printk(KERN_WARNING, cd, "No finished session\n"); break; } cgc.cmd[0] = READ_TOC; /* Read TOC */ cgc.cmd[6] = rc & 0x7f; /* number of last session */ cgc.cmd[8] = 0x0c; cgc.cmd[9] = 0x40; cgc.buffer = buffer; cgc.buflen = 12; cgc.quiet = 1; cgc.data_direction = DMA_FROM_DEVICE; cgc.timeout = VENDOR_TIMEOUT; rc = sr_do_ioctl(cd, &cgc); 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 */ sr_printk(KERN_WARNING, cd, "unknown vendor code (%i), not initialized ?\n", cd->vendor); sector = 0; no_multi = 1; break; } cd->ms_offset = sector; cd->xa_flag = 0; if (CDS_AUDIO != sr_disk_status(cdi) && 1 == sr_is_xa(cd)) cd->xa_flag = 1; if (2048 != cd->device->sector_size) { sr_set_blocklength(cd, 2048); } if (no_multi) cdi->mask |= CDC_MULTI_SESSION; #ifdef DEBUG if (sector) sr_printk(KERN_DEBUG, cd, "multisession offset=%lu\n", sector); #endif kfree(buffer); return rc; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)66770.51%1050.00%
Alan Cox20521.67%15.00%
Christoph Hellwig212.22%210.00%
Hannes Reinecke212.22%15.00%
Al Viro192.01%315.00%
Linus Torvalds70.74%210.00%
Adrian Bunk60.63%15.00%
Total946100.00%20100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)106772.63%1142.31%
Alan Cox25217.15%13.85%
Christoph Hellwig523.54%27.69%
Al Viro402.72%311.54%
Hannes Reinecke291.97%13.85%
Linus Torvalds130.88%27.69%
Adrian Bunk70.48%27.69%
Tejun Heo30.20%13.85%
Andrew Morton30.20%13.85%
Matthew Wilcox20.14%13.85%
Greg Kroah-Hartman10.07%13.85%
Total1469100.00%26100.00%
Directory: drivers/scsi
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