- 根目录:
- drivers
- scsi
- sr_vendor.c
/* -*-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
}
/* 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
printk("%s: MODE SELECT 0x%x/%d\n", cd->cdi.name, 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
printk("%s: switching blocklength to %d bytes failed\n",
cd->cdi.name, blocklength);
#endif
kfree(buffer);
return rc;
}
/* 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) {
printk(KERN_INFO "%s: Hmm, seems the drive "
"doesn't support multisession CD's\n", cd->cdi.name);
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) {
printk(KERN_INFO "%s: Hmm, seems the cdrom "
"doesn't support multisession CD's\n",
cd->cdi.name);
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) {
printk(KERN_INFO "%s: Hmm, seems the drive "
"doesn't support multisession CD's\n",
cd->cdi.name);
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) {
printk(KERN_WARNING
"%s: No finished session\n", cd->cdi.name);
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 */
printk(KERN_WARNING
"%s: unknown vendor code (%i), not initialized ?\n",
cd->cdi.name, 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)
printk(KERN_DEBUG "%s: multisession offset=%lu\n",
cd->cdi.name, sector);
#endif
kfree(buffer);
return rc;
}