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0e61f3de1ab3f8c662af37eeb55edbc2eb1b8ba1
libcdio-osx/lib/cdda_interface/scsi_interface.c
karl 0e61f3de1a gplv3+
2008-04-17 17:39:47 +00:00

1581 lines
39 KiB
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/*
$Id: scsi_interface.c,v 1.3 2008/04/17 17:39:47 karl Exp $
Copyright (C) 2004, 2008 Rocky Bernstein <rocky@gnu.org>
Original interface.c Copyright (C) 1994-1997
Eissfeldt heiko@colossus.escape.de
Current blenderization Copyright (C) 1998-1999 Monty xiphmont@mit.edu
Copyright (C) 1998 Monty xiphmont@mit.edu
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/******************************************************************
*
* Generic SCSI interface specific code.
*
******************************************************************/
#define NEED_STRERROR_TR
#define NEED_MMC_LIST
#define NEED_SCSI_LIST
#include "low_interface.h"
#include "common_interface.h"
#include "utils.h"
#include <cdio/scsi_mmc.h>
#include <cdio/bytesex.h>
/* hook */
static int
Dummy (cdrom_drive_t *d,int s){
return(0);
}
#include "drive_exceptions.h"
static void
tweak_SG_buffer(cdrom_drive_t *d){
int table,reserved;
char buffer[256];
/* maximum transfer size? */
if(ioctl(d->cdda_fd,SG_GET_RESERVED_SIZE,&reserved)){
/* Up, guess not. */
cdmessage(d,"\tCould not get scatter/gather buffer size.\n");
return;
}
if(ioctl(d->cdda_fd,SG_GET_SG_TABLESIZE,&table))table=1;
{
int cur;
sprintf(buffer,"\tDMA scatter/gather table entries: %d\n\t"
"table entry size: %d bytes\n\t"
"maximum theoretical transfer: %d sectors\n",
table,reserved,table*reserved/CDIO_CD_FRAMESIZE_RAW);
cdmessage(d,buffer);
cur=table*reserved;
/* not too much; new kernels have trouble with DMA allocation, so
be more conservative: 32kB max until I test more thoroughly */
cur=(cur>1024*32?1024*32:cur);
d->nsectors=cur/CDIO_CD_FRAMESIZE_RAW;
d->bigbuff=cur;
sprintf(buffer,"\tSetting default read size to %d sectors (%d bytes).\n\n",
d->nsectors,d->nsectors*CDIO_CD_FRAMESIZE_RAW);
cdmessage(d,buffer);
}
/* Disable command queue; we don't need it, no reason to have it on */
reserved=0;
if(ioctl(d->cdda_fd,SG_SET_COMMAND_Q,&reserved)){
cdmessage(d,"\tCouldn't disable command queue! Continuing anyway...\n");
}
}
static void
reset_scsi(cdrom_drive_t *d)
{
int arg;
d->enable_cdda(d,0);
cdmessage(d,"sending SG SCSI reset... ");
if(ioctl(d->cdda_fd,SG_SCSI_RESET,&arg))
cdmessage(d,"FAILED: EBUSY\n");
else
cdmessage(d,"OK\n");
d->enable_cdda(d,1);
}
static void
clear_garbage(cdrom_drive_t *d)
{
fd_set fdset;
struct timeval tv;
struct sg_header *sg_hd=(struct sg_header *)d->sg;
int flag=0;
/* clear out any possibly preexisting garbage */
FD_ZERO(&fdset);
FD_SET(d->cdda_fd,&fdset);
tv.tv_sec=0;
tv.tv_usec=0;
/* I like select */
while(select(d->cdda_fd+1,&fdset,NULL,NULL,&tv)==1){
sg_hd->twelve_byte = 0;
sg_hd->result = 0;
sg_hd->reply_len = SG_OFF;
read(d->cdda_fd, sg_hd, 1);
/* reset for select */
FD_ZERO(&fdset);
FD_SET(d->cdda_fd,&fdset);
tv.tv_sec=0;
tv.tv_usec=0;
if(!flag && d->report_all)
cdmessage(d,"Clearing previously returned data from SCSI buffer\n");
flag=1;
}
}
/* process a complete scsi command. */
static int
handle_scsi_cmd(cdrom_drive_t *d,
unsigned int cmd_len, unsigned int in_size,
unsigned int out_size, unsigned char bytefill,
int bytecheck)
{
int status = 0;
struct sg_header *sg_hd=(struct sg_header *)d->sg;
long writebytes=SG_OFF+cmd_len+in_size;
/* generic scsi device services */
/* clear out any possibly preexisting garbage */
clear_garbage(d);
memset(sg_hd,0,sizeof(sg_hd));
sg_hd->twelve_byte = cmd_len == 12;
sg_hd->result = 0;
sg_hd->reply_len = SG_OFF + out_size;
/* The following is one of the scariest hacks I've ever had to use.
The idea is this: We want to know if a command fails. The
generic scsi driver (as of now) won't tell us; it hands back the
uninitialized contents of the preallocated kernel buffer. We
force this buffer to a known value via another bug (nonzero data
length for a command that doesn't take data) such that we can
tell if the command failed. Scared yet? */
if(bytecheck && out_size>in_size){
memset(d->sg_buffer+cmd_len+in_size,bytefill,out_size-in_size);
/* the size does not remove cmd_len due to the way the kernel
driver copies buffers */
writebytes+=(out_size-in_size);
}
{
/* Select on write with a 5 second timeout. This is a hack until
a better error reporting layer is in place in alpha 10; right
now, always print a message. */
fd_set fdset;
struct timeval tv;
FD_ZERO(&fdset);
FD_SET(d->cdda_fd,&fdset);
tv.tv_sec=60; /* Increased to 1m for plextor, as the drive will
try to get through rough spots on its own and
this can take time 19991129 */
tv.tv_usec=0;
while(1){
int ret=select(d->cdda_fd+1,NULL,&fdset,NULL,&tv);
if(ret>0)break;
if(ret<0 && errno!=EINTR)break;
if(ret==0){
fprintf(stderr,"\nSCSI transport error: timeout waiting to write"
" packet\n\n");
return(TR_EWRITE);
}
}
}
sigprocmask (SIG_BLOCK, &(d->sigset), NULL );
errno=0;
status = write(d->cdda_fd, sg_hd, writebytes );
if (status<0 || status != writebytes ) {
sigprocmask ( SIG_UNBLOCK, &(d->sigset), NULL );
if(errno==0)errno=EIO;
return(TR_EWRITE);
}
{
/* Select on read (and write; this signals an error) with a 5
second timeout. This is a hack until a better error reporting
layer is in place in alpha 10; right now, always print a
message. */
fd_set rset;
struct timeval tv;
FD_ZERO(&rset);
FD_SET(d->cdda_fd,&rset);
tv.tv_sec=60; /* Increased to 1m for plextor, as the drive will
try to get through rough spots on its own and
this can take time 19991129 */
tv.tv_usec=0;
while(1){
int ret=select(d->cdda_fd+1,&rset,NULL,NULL,&tv);
if(ret<0 && errno!=EINTR)break;
if(ret==0){
sigprocmask ( SIG_UNBLOCK, &(d->sigset), NULL );
fprintf(stderr,"\nSCSI transport error: timeout waiting to read"
" packet\n\n");
return(TR_EREAD);
}
if(ret>0){
/* is it readable or something else? */
if(FD_ISSET(d->cdda_fd,&rset))break;
sigprocmask ( SIG_UNBLOCK, &(d->sigset), NULL );
fprintf(stderr,"\nSCSI transport: error reading packet\n\n");
return(TR_EREAD);
}
}
}
errno=0;
status = read(d->cdda_fd, sg_hd, SG_OFF + out_size);
sigprocmask ( SIG_UNBLOCK, &(d->sigset), NULL );
if (status<0)return(TR_EREAD);
if(status != SG_OFF + out_size || sg_hd->result){
if(errno==0)errno=EIO;
return(TR_EREAD);
}
if(sg_hd->sense_buffer[0]){
char key=sg_hd->sense_buffer[2]&0xf;
char ASC=sg_hd->sense_buffer[12];
char ASCQ=sg_hd->sense_buffer[13];
switch(key){
case 0:
if(errno==0)errno=EIO;
return(TR_UNKNOWN);
case 1:
break;
case 2:
if(errno==0)errno=EBUSY;
return(TR_BUSY);
case 3:
if(ASC==0x0C && ASCQ==0x09){
/* loss of streaming */
if(errno==0)errno=EIO;
return(TR_STREAMING);
}else{
if(errno==0)errno=EIO;
return(TR_MEDIUM);
}
case 4:
if(errno==0)errno=EIO;
return(TR_FAULT);
case 5:
if(errno==0)errno=EINVAL;
return(TR_ILLEGAL);
default:
if(errno==0)errno=EIO;
return(TR_UNKNOWN);
}
}
/* still not foolproof; the following doesn't guarantee that we got
all the data, just that the command was not rejected. */
/* Why do this with the above sense stuff? For some reason,
commands still get through. Perhaps no data comes back even
though the target reports success? */
if(bytecheck && in_size+cmd_len<out_size){
long i,flag=0;
for(i=in_size;i<out_size;i++)
if(d->sg_buffer[i]!=bytefill){
flag=1;
break;
}
if(!flag){
errno=EINVAL;
return(TR_ILLEGAL);
}
}
errno=0;
return(0);
}
/* Group 1 (10b) command */
static int
mode_sense_atapi(cdrom_drive_t *d, int size, int page)
{
memcpy(d->sg_buffer,
(char []) {CDIO_MMC_GPCMD_MODE_SENSE_10,
0x00, /* reserved */
0x00, /* page */
0, /* reserved */
0, /* reserved */
0, /* reserved */
0, /* reserved */
0, /* MSB (0) */
0, /* sizeof(modesense - SG_OFF) */
0}, /* reserved */
10);
d->sg_buffer[1]=d->lun<<5;
d->sg_buffer[2]=0x3F&page;
d->sg_buffer[8]=size+4;
if (handle_scsi_cmd (d, 10, 0, size+4,'\377',1)) return(1);
{
char *b=d->sg_buffer;
if(b[0])return(1); /* Handles only up to 256 bytes */
if(b[6])return(1); /* Handles only up to 256 bytes */
b[0]=b[1]-3;
b[1]=b[2];
b[2]=b[3];
b[3]=b[7];
memmove(b+4,b+8,size);
}
return(0);
}
/* group 0 (6b) command */
static int
mode_sense_scsi(cdrom_drive_t *d, int size, int page)
{
memcpy(d->sg_buffer,
(char []) {CDIO_MMC_GPCMD_MODE_SENSE,
0x00, /* return block descriptor/lun */
0x00, /* page */
0, /* reserved */
0, /* sizeof(modesense - SG_OFF) */
0}, /* control */
6);
d->sg_buffer[1]=d->lun<<5;
d->sg_buffer[2]=(0x3F&page);
d->sg_buffer[4]=size;
if (handle_scsi_cmd (d, 6, 0, size, '\377',1)) return(1);
return(0);
}
static int mode_sense(cdrom_drive_t *d,int size,int page){
if(d->is_atapi)
return(mode_sense_atapi(d,size,page));
return(mode_sense_scsi(d,size,page));
}
static int mode_select(cdrom_drive_t *d,int density,int secsize){
/* short circut the way Heiko does it; less flexible, but shorter */
if(d->is_atapi){
unsigned char *mode = d->sg_buffer + 18;
memcpy(d->sg_buffer,
(char []) { CDIO_MMC_GPCMD_MODE_SELECT,
0x10, /* no save page */
0, /* reserved */
0, /* reserved */
0, /* reserved */
0, /* reserved */
0, /* reserved */
0, /* reserved */
12, /* sizeof(mode) */
0, /* reserved */
/* mode parameter header */
0, 0, 0, 0, 0, 0, 0,
8, /* Block Descriptor Length */
/* descriptor block */
0, /* Density Code */
0, 0, 0, /* # of Blocks */
0, /* reserved */
0, 0, 0},/* Blocklen */
26);
d->sg_buffer[1]|=d->lun<<5;
/* prepare to read cds in the previous mode */
mode [0] = density;
mode [6] = secsize >> 8; /* block length "msb" */
mode [7] = secsize & 0xFF; /* block length lsb */
/* do the scsi cmd */
return(handle_scsi_cmd (d,10, 16, 0,0,0));
}else{
unsigned char *mode = d->sg_buffer + 10;
memcpy(d->sg_buffer,
(char []) { CDIO_MMC_GPCMD_MODE_SELECT,
0x10, /* no save page */
0, /* reserved */
0, /* reserved */
12, /* sizeof(mode) */
0, /* reserved */
/* mode section */
0,
0, 0,
8, /* Block Descriptor Length */
0, /* Density Code */
0, 0, 0, /* # of Blocks */
0, /* reserved */
0, 0, 0},/* Blocklen */
18);
/* prepare to read cds in the previous mode */
mode [0] = density;
mode [6] = secsize >> 8; /* block length "msb" */
mode [7] = secsize & 0xFF; /* block length lsb */
/* do the scsi cmd */
return(handle_scsi_cmd (d,6, 12, 0,0,0));
}
}
/* get current sector size from SCSI cdrom drive */
static unsigned int
get_orig_sectorsize(cdrom_drive_t *d)
{
if(mode_sense(d,12,0x01))return(-1);
d->orgdens = d->sg_buffer[4];
return(d->orgsize = ((int)(d->sg_buffer[10])<<8)+d->sg_buffer[11]);
}
/* switch CDROM scsi drives to given sector size */
static int set_sectorsize (cdrom_drive_t *d,unsigned int secsize)
{
return(mode_select(d,d->orgdens,secsize));
}
/* switch Toshiba/DEC and HP drives from/to cdda density */
int
scsi_enable_cdda (cdrom_drive_t *d, int fAudioMode)
{
if (fAudioMode) {
if(mode_select(d,d->density,CDIO_CD_FRAMESIZE_RAW)){
if(d->error_retry)
cderror(d,"001: Unable to set CDROM to read audio mode\n");
return(-1);
}
} else {
if(mode_select(d,d->orgdens,d->orgsize)){
if(d->error_retry)
cderror(d,"001: Unable to set CDROM to read audio mode\n");
return(-1);
}
}
return(0);
}
typedef struct scsi_TOC { /* structure of scsi table of contents (cdrom) */
unsigned char reserved1;
unsigned char bFlags;
unsigned char bTrack;
unsigned char reserved2;
signed char start_MSB;
unsigned char start_1;
unsigned char start_2;
unsigned char start_LSB;
} scsi_TOC;
/* read the table of contents from the cd and fill the TOC array */
/* Do it like the kernel ioctl driver; the 'all at once' approach
fails on at least one Kodak drive. */
static int
scsi_read_toc (cdrom_drive_t *d)
{
int i,first,last;
track_t i_tracks;
/* READTOC, MSF format flag, res, res, res, res, Start track, len msb,
len lsb, flags */
/* read the header first */
memcpy(d->sg_buffer, (char []){ CDIO_MMC_GPCMD_READ_TOC,
0, 0, 0, 0, 0, 1, 0, 12, 0}, 10);
d->sg_buffer[1]=d->lun<<5;
if (handle_scsi_cmd (d,10, 0, 12,'\377',1)){
cderror(d,"004: Unable to read table of contents header\n");
return(-4);
}
first=d->sg_buffer[2];
last=d->sg_buffer[3];
i_tracks=last-first+1;
if (last > MAXTRK || first > MAXTRK || last<0 || first<0) {
cderror(d,"003: CDROM reporting illegal number of tracks\n");
return(-3);
}
for (i = first; i <= last; i++){
memcpy(d->sg_buffer, (char []){ CDIO_MMC_GPCMD_READ_TOC,
0, 0, 0, 0, 0, 0, 0, 12, 0}, 10);
d->sg_buffer[1]=d->lun<<5;
d->sg_buffer[6]=i;
if (handle_scsi_cmd (d,10, 0, 12,'\377',1)){
cderror(d,"005: Unable to read table of contents entry\n");
return(-5);
}
{
scsi_TOC *toc=(scsi_TOC *)(d->sg_buffer+4);
d->disc_toc[i-first].bFlags=toc->bFlags;
d->disc_toc[i-first].bTrack=i;
d->disc_toc[i-first].dwStartSector= d->adjust_ssize *
(((int)(toc->start_MSB)<<24) |
(toc->start_1<<16)|
(toc->start_2<<8)|
(toc->start_LSB));
}
}
memcpy(d->sg_buffer, (char []){ CDIO_MMC_GPCMD_READ_TOC,
0, 0, 0, 0, 0, 0, 0, 12, 0}, 10);
d->sg_buffer[1]=d->lun<<5;
d->sg_buffer[6]=0xAA;
if (handle_scsi_cmd (d,10, 0, 12,'\377',1)){
cderror(d,"002: Unable to read table of contents lead-out\n");
return(-2);
}
{
scsi_TOC *toc=(scsi_TOC *)(d->sg_buffer+4);
d->disc_toc[i-first].bFlags=toc->bFlags;
d->disc_toc[i-first].bTrack=0xAA;
d->disc_toc[i-first].dwStartSector= d->adjust_ssize *
(((int)(toc->start_MSB)<<24) |
(toc->start_1<<16)|
(toc->start_2<<8)|
(toc->start_LSB));
}
d->cd_extra = FixupTOC(d,i_tracks+1); /* include lead-out */
return(i_tracks);
}
/* a contribution from Boris for IMS cdd 522 */
/* check this for ACER/Creative/Foo 525,620E,622E, etc? */
static int
scsi_read_toc2 (cdrom_drive_t *d)
{
u_int32_t foo,bar;
int i;
track_t i_tracks;
memcpy(d->sg_buffer, (char[]){ 0xe5, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 10);
d->sg_buffer[5]=1;
d->sg_buffer[8]=255;
if (handle_scsi_cmd (d,10, 0, 256,'\377',1)){
cderror(d,"004: Unable to read table of contents header\n");
return(-4);
}
/* copy to our structure and convert start sector */
i_tracks = d->sg_buffer[1];
if (i_tracks > MAXTRK) {
cderror(d,"003: CDROM reporting illegal number of tracks\n");
return(-3);
}
for (i = 0; i < i_tracks; i++){
memcpy(d->sg_buffer, (char[]){ 0xe5, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 10);
d->sg_buffer[5]=i+1;
d->sg_buffer[8]=255;
if (handle_scsi_cmd (d,10, 0, 256,'\377',1)){
cderror(d,"005: Unable to read table of contents entry\n");
return(-5);
}
d->disc_toc[i].bFlags = d->sg_buffer[10];
d->disc_toc[i].bTrack = i + 1;
d->disc_toc[i].dwStartSector= d->adjust_ssize *
(((signed char)(d->sg_buffer[2])<<24) |
(d->sg_buffer[3]<<16)|
(d->sg_buffer[4]<<8)|
(d->sg_buffer[5]));
}
d->disc_toc[i].bFlags = 0;
d->disc_toc[i].bTrack = i + 1;
memcpy (&foo, d->sg_buffer+2, 4);
memcpy (&bar, d->sg_buffer+6, 4);
d->disc_toc[i].dwStartSector =
d->adjust_ssize * (UINT32_FROM_BE(foo) + UINT32_FROM_BE(bar));
d->disc_toc[i].dwStartSector= d->adjust_ssize *
((((signed char)(d->sg_buffer[2])<<24) |
(d->sg_buffer[3]<<16)|
(d->sg_buffer[4]<<8)|
(d->sg_buffer[5]))+
((((signed char)(d->sg_buffer[6])<<24) |
(d->sg_buffer[7]<<16)|
(d->sg_buffer[8]<<8)|
(d->sg_buffer[9]))));
d->cd_extra = FixupTOC(d,i_tracks+1);
return(i_tracks);
}
/* These do one 'extra' copy in the name of clean code */
static int
i_read_28 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_10,
0, 0, 0, 0, 0, 0, 0, 0, 0},
10);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,10,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_A8 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_12,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
12);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[9] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_D4_10 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){0xd4, 0, 0, 0, 0, 0, 0, 0, 0, 0},10);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,10,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int i_read_D4_12 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){0xd4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},12);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[9] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_D5 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){0xd5, 0, 0, 0, 0, 0, 0, 0, 0, 0},10);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,10,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_D8 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){0xd8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},12);
if(d->fua)
d->sg_buffer[1]=0x08;
d->sg_buffer[1]|=d->lun<<5;
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[9] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_mmc (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
/* if(begin<=12007 && begin+sectors>12000){
errno=EIO;
return(TR_ILLEGAL);
}*/
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_CD,
0, 0, 0, 0, 0, 0, 0, 0, 0x10, 0, 0},12);
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_mmc2 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_CD,
0, 0, 0, 0, 0, 0, 0, 0, 0xf8, 0, 0},12);
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_mmc3 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_CD,
4, 0, 0, 0, 0, 0, 0, 0, 0xf8, 0, 0},12);
d->sg_buffer[3] = (begin >> 16) & 0xFF;
d->sg_buffer[4] = (begin >> 8) & 0xFF;
d->sg_buffer[5] = begin & 0xFF;
d->sg_buffer[8] = sectors;
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
/* straight from the MMC3 spec */
static inline void
LBA_to_MSF(lba_t lba, unsigned char *M, unsigned char *S, unsigned char *F)
{
if (lba>=-CDIO_PREGAP_SECTORS){
*M = ( lba+CDIO_PREGAP_SECTORS)/(CDIO_CD_FRAMES_PER_MIN);
lba -= (*M)*(CDIO_CD_FRAMES_PER_MIN);
*S = (lba+CDIO_PREGAP_SECTORS)/CDIO_CD_FRAMES_PER_SEC;
lba -= (*S)*CDIO_CD_FRAMES_PER_SEC;
*F = (lba+CDIO_PREGAP_SECTORS);
} else {
*M = (lba+450150)/(CDIO_CD_FRAMES_PER_MIN);
lba -= (*M)*(CDIO_CD_FRAMES_PER_MIN);
*S = (lba+450150)/CDIO_CD_FRAMES_PER_SEC;
lba -= (*S)*CDIO_CD_FRAMES_PER_SEC;
*F = (lba+450150);
}
}
static int
i_read_msf (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_MSF,
0, 0, 0, 0, 0, 0, 0, 0, 0x10, 0, 0},12);
LBA_to_MSF(begin,d->sg_buffer+3,d->sg_buffer+4,d->sg_buffer+5);
LBA_to_MSF(begin+sectors,d->sg_buffer+6,d->sg_buffer+7,d->sg_buffer+8);
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_msf2 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_MSF,
0, 0, 0, 0, 0, 0, 0, 0, 0xf8, 0, 0},12);
LBA_to_MSF(begin,d->sg_buffer+3,d->sg_buffer+4,d->sg_buffer+5);
LBA_to_MSF(begin+sectors,d->sg_buffer+6,d->sg_buffer+7,d->sg_buffer+8);
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static int
i_read_msf3 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
int ret;
memcpy(d->sg_buffer,(char []){
CDIO_MMC_GPCMD_READ_MSF,
4, 0, 0, 0, 0, 0, 0, 0, 0xf8, 0, 0},12);
LBA_to_MSF(begin,d->sg_buffer+3,d->sg_buffer+4,d->sg_buffer+5);
LBA_to_MSF(begin+sectors,d->sg_buffer+6,d->sg_buffer+7,d->sg_buffer+8);
if((ret=handle_scsi_cmd(d,12,0,sectors * CDIO_CD_FRAMESIZE_RAW,'\177',1)))
return(ret);
if(p)memcpy(p,d->sg_buffer,sectors*CDIO_CD_FRAMESIZE_RAW);
return(0);
}
static long
scsi_read_map (cdrom_drive_t *d, void *p, long int begin, long int sectors,
int (*map)(cdrom_drive_t *, void *, long, long))
{
int retry_count,err;
char *buffer=(char *)p;
/* read d->nsectors at a time, max. */
sectors=(sectors>d->nsectors?d->nsectors:sectors);
sectors=(sectors<1?1:sectors);
retry_count=0;
while(1) {
if((err=map(d,(p?buffer:NULL),begin,sectors))){
if(d->report_all){
struct sg_header *sg_hd=(struct sg_header *)d->sg;
char b[256];
sprintf(b,"scsi_read error: sector=%ld length=%ld retry=%d\n",
begin,sectors,retry_count);
cdmessage(d,b);
sprintf(b," Sense key: %x ASC: %x ASCQ: %x\n",
(int)(sg_hd->sense_buffer[2]&0xf),
(int)(sg_hd->sense_buffer[12]),
(int)(sg_hd->sense_buffer[13]));
cdmessage(d,b);
sprintf(b," Transport error: %s\n",strerror_tr[err]);
cdmessage(d,b);
sprintf(b," System error: %s\n",strerror(errno));
cdmessage(d,b);
fprintf(stderr,"scsi_read error: sector=%ld length=%ld retry=%d\n",
begin,sectors,retry_count);
fprintf(stderr," Sense key: %x ASC: %x ASCQ: %x\n",
(int)(sg_hd->sense_buffer[2]&0xf),
(int)(sg_hd->sense_buffer[12]),
(int)(sg_hd->sense_buffer[13]));
fprintf(stderr," Transport error: %s\n",strerror_tr[err]);
fprintf(stderr," System error: %s\n",strerror(errno));
}
if(!d->error_retry)return(-7);
switch(errno){
case EINTR:
usleep(100);
continue;
case ENOMEM:
/* D'oh. Possible kernel error. Keep limping */
usleep(100);
if(sectors==1){
/* Nope, can't continue */
cderror(d,"300: Kernel memory error\n");
return(-300);
}
if(d->report_all){
char b[256];
sprintf(b,"scsi_read: kernel couldn't alloc %ld bytes. "
"backing off...\n",sectors*CDIO_CD_FRAMESIZE_RAW);
cdmessage(d,b);
}
sectors--;
continue;
default:
if(sectors==1){
if(errno==EIO)
if(d->fua==-1) /* testing for FUA support */
return(-7);
/* *Could* be I/O or media error. I think. If we're at
30 retries, we better skip this unhappy little
sector. */
if(retry_count>MAX_RETRIES-1){
char b[256];
sprintf(b,"010: Unable to access sector %ld\n",
begin);
cderror(d,b);
return(-10);
}
break;
}
/* Hmm. OK, this is just a tad silly. just in case this was
a timeout and a reset happened, we need to set the drive
back to cdda */
reset_scsi(d);
}
}else{
/* Did we get all the bytes we think we did, or did the kernel
suck? */
if(buffer){
long i;
for(i=sectors*CDIO_CD_FRAMESIZE_RAW;i>1;i-=2)
if(buffer[i-1]!='\177' || buffer[i-2]!='\177')
break;
i/=CDIO_CD_FRAMESIZE_RAW;
if(i!=sectors){
if(d->report_all){
char b[256];
sprintf(b,"scsi_read underrun: pos=%ld len=%ld read=%ld retry=%d\n",
begin,sectors,i,retry_count);
cdmessage(d,b);
}
reset_scsi(d);
}
if(i>0)return(i);
}else
break;
}
retry_count++;
if(sectors==1 && retry_count>MAX_RETRIES){
cderror(d,"007: Unknown, unrecoverable error reading data\n");
return(-7);
}
if(sectors>1)sectors=sectors/2;
d->enable_cdda(d,0);
d->enable_cdda(d,1);
}
return(sectors);
}
long int
scsi_read_28 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_28));
}
long int
scsi_read_A8 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_A8));
}
long int
scsi_read_D4_10 (cdrom_drive_t *d, void *p, long int begin, long int sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_D4_10));
}
long int
scsi_read_D4_12 (cdrom_drive_t *d, void *p, long int begin,
long int sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_D4_12));
}
static long int
scsi_read_D5 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_D5));
}
long scsi_read_D8 (cdrom_drive_t *d, void *p, long begin,
long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_D8));
}
long scsi_read_mmc (cdrom_drive_t *d, void *p, long begin,
long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_mmc));
}
long scsi_read_mmc2 (cdrom_drive_t *d, void *p, long begin,
long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_mmc2));
}
static long
scsi_read_mmc3 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_mmc3));
}
static long
scsi_read_msf (cdrom_drive_t *d, void *p, long begin, long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_msf));
}
static long
scsi_read_msf2 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_msf2));
}
static long
scsi_read_msf3 (cdrom_drive_t *d, void *p, long begin, long sectors)
{
return(scsi_read_map(d,p,begin,sectors,i_read_msf3));
}
/* Some drives, given an audio read command, return only 2048 bytes
of data as opposed to 2352 bytes. Look for bytess at the end of the
single sector verification read */
static int
count_2352_bytes(cdrom_drive_t *d)
{
long int i;
for (i=CDIO_CD_FRAMESIZE_RAW-1; i>=0; i--)
if(d->sg_buffer[i]!=(unsigned char)'\177')
return(((i+3)>>2)<<2);
return(0);
}
static int
verify_nonzero(cdrom_drive_t *d)
{
long i,flag=0;
for (i=0; i<CDIO_CD_FRAMESIZE_RAW ;i++)
if(d->sg_buffer[i]!=0){
flag=1;
break;
}
return(flag);
}
/* So many different read commands, densities, features...
Verify that our selected 'read' command actually reads
nonzero data, else search through other possibilities */
static int
verify_read_command(cdrom_drive_t *d)
{
int i,j,k;
int audioflag=0;
int (*enablecommand) (cdrom_drive_t *d, int speed);
long (*readcommand) (cdrom_drive_t *d, void *p, long begin,
long int sectors);
unsigned char density;
int16_t *buff=malloc(CDIO_CD_FRAMESIZE_RAW);
cdmessage(d,"Verifying CDDA command set...\n");
/* try the expected command set; grab the center of each track, look
for data */
if(d->enable_cdda(d,1)==0){
for(i=1;i<=d->tracks;i++){
if(cdda_track_audiop(d,i)==1){
long firstsector=cdda_track_firstsector(d,i);
long lastsector=cdda_track_lastsector(d,i);
long sector=(firstsector+lastsector)>>1;
audioflag=1;
if(d->read_audio(d,buff,sector,1)>0){
if(count_2352_bytes(d)==CDIO_CD_FRAMESIZE_RAW){
cdmessage(d,"\tExpected command set reads OK.\n");
d->enable_cdda(d,0);
free(buff);
return(0);
}
}
}
}
d->enable_cdda(d,0);
}
if(!audioflag){
cdmessage(d,"\tCould not find any audio tracks on this disk.\n");
return(-403);
}
{
const char *es="",*rs="";
d->bigendianp=-1;
density=d->density;
readcommand=d->read_audio;
enablecommand=d->enable_cdda;
/* No nonzeroes? D'oh. Exhaustive search */
cdmessage(d,"\tExpected command set FAILED!\n"
"\tPerforming full probe for CDDA command set...\n");
/* loops:
density/enable no, 0x0/org, 0x04/org, 0x82/org
read command read_10 read_12 read_nec read_sony read_mmc read_mmc2 */
/* NEC test must come before sony; the nec drive expects d8 to be
10 bytes, and a 12 byte verson (Sony) crashes the drive */
for(j=0;j>=0;j++){
int densitypossible=1;
switch(j){
case 0:
d->read_audio=scsi_read_28;
rs="28 0x,00";
break;
case 1:
d->read_audio=scsi_read_A8;
rs="a8 0x,00";
break;
case 2:
d->read_audio=scsi_read_mmc;
rs="be 00,10";
densitypossible=0;
break;
case 3:
d->read_audio=scsi_read_mmc2;
rs="be 00,f8";
densitypossible=0;
break;
case 4:
d->read_audio=scsi_read_mmc3;
rs="be 04,f8";
densitypossible=0;
break;
case 5:
d->read_audio=scsi_read_msf;
rs="b9 00,10";
densitypossible=0;
break;
case 6:
d->read_audio=scsi_read_msf2;
rs="b9 00,f8";
densitypossible=0;
break;
case 7:
d->read_audio=scsi_read_msf3;
rs="b9 04,f8";
densitypossible=0;
break;
case 8:
d->read_audio=scsi_read_D4_10;
rs="d4(10)0x";
break;
case 9:
d->read_audio=scsi_read_D4_12;
rs="d4(12)0x";
break;
case 10:
d->read_audio=scsi_read_D5;
rs="d5 0x,00";
break;
case 11:
d->read_audio=scsi_read_D8;
rs="d8 0x,00";
j=-2;
break;
}
for(i=0;i>=0;i++){
switch(i){
case 0:
d->density=0;
d->enable_cdda=Dummy;
es="none ";
if(!densitypossible)i=-2; /* short circuit MMC style commands */
break;
case 1:
d->density=0;
d->enable_cdda=scsi_enable_cdda;
es="yes/0x00";
break;
case 2:
d->density=0x04;
d->enable_cdda=scsi_enable_cdda;
es="yes/0x04";
break;
case 3:
d->density=0x82;
d->enable_cdda=scsi_enable_cdda;
es="yes/0x82";
case 4:
d->density=0x81;
d->enable_cdda=scsi_enable_cdda;
es="yes/0x81";
i=-2;
break;
}
cdmessage(d,"\ttest -> density: [");
cdmessage(d,es);
cdmessage(d,"] command: [");
cdmessage(d,rs);
cdmessage(d,"]\n");
{
int densityflag=0;
int rejectflag=0;
int zeroflag=0;
int lengthflag=0;
if(d->enable_cdda(d,1)==0){
for(k=1;k<=d->tracks;k++){
if(cdda_track_audiop(d,k)==1){
long firstsector=cdda_track_firstsector(d,k);
long lastsector=cdda_track_lastsector(d,k);
long sector=(firstsector+lastsector)>>1;
if(d->read_audio(d,buff,sector,1)>0){
if((lengthflag=count_2352_bytes(d))==CDIO_CD_FRAMESIZE_RAW){
if(verify_nonzero(d)){
cdmessage(d,"\t\tCommand set FOUND!\n");
free(buff);
d->enable_cdda(d,0);
return(0);
}else{
zeroflag++;
}
}
}else{
rejectflag++;
break;
}
}
}
d->enable_cdda(d,0);
}else{
densityflag++;
}
if(densityflag)
cdmessage(d,"\t\tDrive rejected density set\n");
if(rejectflag){
char buffer[256];
sprintf(buffer,"\t\tDrive rejected read command packet(s)\n");
cdmessage(d,buffer);
}
if(lengthflag>0 && lengthflag<CDIO_CD_FRAMESIZE_RAW){
char buffer[256];
sprintf(buffer,"\t\tDrive returned at least one packet, but with\n"
"\t\tincorrect size (%d)\n",lengthflag);
cdmessage(d,buffer);
}
if(zeroflag){
char buffer[256];
sprintf(buffer,"\t\tDrive returned %d packet(s), but contents\n"
"\t\twere entirely zero\n",zeroflag);
cdmessage(d,buffer);
}
}
}
}
/* D'oh. */
d->density=density;
d->read_audio=readcommand;
d->enable_cdda=enablecommand;
cdmessage(d,"\tUnable to find any suitable command set from probe;\n"
"\tdrive probably not CDDA capable.\n");
cderror(d,"006: Could not read any data from drive\n");
}
free(buff);
return(-6);
}
static void
check_fua_bit(cdrom_drive_t *d){
int16_t *buff=malloc(CDIO_CD_FRAMESIZE_RAW);
long i;
if(d->read_audio==scsi_read_mmc)return;
if(d->read_audio==scsi_read_mmc2)return;
if(d->read_audio==scsi_read_mmc3)return;
cdmessage(d,"This command set may use a Force Unit Access bit.");
cdmessage(d,"\nChecking drive for FUA bit support...\n");
d->enable_cdda(d,1);
d->fua=1;
for(i=1;i<=d->tracks;i++){
if(cdda_track_audiop(d,i)==1){
long firstsector=cdda_track_firstsector(d,i);
long lastsector=cdda_track_lastsector(d,i);
long sector=(firstsector+lastsector)>>1;
if(d->read_audio(d,buff,sector,1)>0){
cdmessage(d,"\tDrive accepted FUA bit.\n");
d->enable_cdda(d,0);
free(buff);
return;
}
}
}
d->fua=0;
cdmessage(d,"\tDrive rejected FUA bit.\n");
free(buff);
return;
}
static int
check_atapi(cdrom_drive_t *d){
int atapiret=-1;
int fd = d->cdda_fd; /* this is the correct fd (not ioctl_fd), as the
generic device is the device we need to check */
cdmessage(d,"\nChecking for SCSI emulation...\n");
if (ioctl(fd,SG_EMULATED_HOST,&atapiret)){
cderror(d,"\tSG_EMULATED_HOST ioctl() failed!\n");
return(-1);
} else {
if(atapiret==1){
cdmessage(d,"\tDrive is ATAPI (using SCSI host adaptor emulation)\n");
/* Disable kernel SCSI command translation layer for access through sg */
if (ioctl(fd,SG_SET_TRANSFORM,0))
cderror(d,"\tCouldn't disable kernel command translation layer\n");
d->is_atapi=1;
}else{
cdmessage(d,"\tDrive is SCSI\n");
d->is_atapi=0;
}
return(d->is_atapi);
}
}
static int check_mmc(cdrom_drive_t *d){
char *b;
cdmessage(d,"\nChecking for MMC style command set...\n");
d->is_mmc=0;
if(mode_sense(d,22,0x2A)==0){
b=d->sg_buffer;
b+=b[3]+4;
if((b[0]&0x3F)==0x2A){
/* MMC style drive! */
d->is_mmc=1;
if(b[1]>=4){
if(b[5]&0x1){
cdmessage(d,"\tDrive is MMC style\n");
return(1);
}else{
cdmessage(d,"\tDrive is MMC, but reports CDDA incapable.\n");
cdmessage(d,"\tIt will likely not be able to read audio data.\n");
return(1);
}
}
}
}
cdmessage(d,"\tDrive does not have MMC CDDA support\n");
return(0);
}
static void
check_exceptions(cdrom_drive_t *d, exception_t *list)
{
int i=0;
while(list[i].model){
if(!strncmp(list[i].model,d->drive_model,strlen(list[i].model))){
if(list[i].density)d->density=list[i].density;
if(list[i].enable)d->enable_cdda=list[i].enable;
if(list[i].read)d->read_audio=list[i].read;
if(list[i].bigendianp!=-1)d->bigendianp=list[i].bigendianp;
return;
}
i++;
}
}
/* request vendor brand and model */
unsigned char *
scsi_inquiry(cdrom_drive_t *d){
memcpy(d->sg_buffer,(char[]){ 0x12,0,0,0,56,0},6);
if(handle_scsi_cmd(d,6, 0, 56,'\377',1)) {
cderror(d,"008: Unable to identify CDROM model\n");
return(NULL);
}
return (d->sg_buffer);
}
int
scsi_init_drive(cdrom_drive_t *d){
int ret;
check_atapi(d);
check_mmc(d);
/* generic Sony type defaults; specialize from here */
d->density = 0x0;
d->enable_cdda = Dummy;
d->read_audio = scsi_read_D8;
d->fua=0x0;
if(d->is_atapi)d->lun=0; /* it should already be; just to make sure */
if(d->is_mmc){
d->read_audio = scsi_read_mmc2;
d->bigendianp=0;
check_exceptions(d,mmc_list);
}else{
if(d->is_atapi){
/* Not MMC maybe still uses CDIO_MMC_GPCMD_READ_CD */
d->read_audio = scsi_read_mmc2;
d->bigendianp=0;
check_exceptions(d,atapi_list);
}else{
check_exceptions(d,scsi_list);
}
}
/* we really do want the sector size at 2048 to begin.*/
if (!d->is_atapi)
set_sectorsize(d, CDIO_CD_FRAMESIZE);
d->enable_cdda(d,0);
d->read_toc = (!memcmp(d->drive_model, "IMS", 3) && !d->is_atapi)
? scsi_read_toc2 : scsi_read_toc;
d->set_speed = NULL;
if (!d->is_atapi) {
unsigned int sector_size= get_orig_sectorsize(d);
if ( (sector_size < CDIO_CD_FRAMESIZE)
&& set_sectorsize(d, CDIO_CD_FRAMESIZE) )
d->adjust_ssize = CDIO_CD_FRAMESIZE / sector_size;
else
d->adjust_ssize = 1;
} else
d->adjust_ssize = 1;
d->tracks=d->read_toc(d);
if(d->tracks<1)
return(d->tracks);
tweak_SG_buffer(d);
d->opened=1;
if((ret=verify_read_command(d)))return(ret);
check_fua_bit(d);
d->error_retry=1;
d->sg=realloc(d->sg,d->nsectors*CDIO_CD_FRAMESIZE_RAW + SG_OFF + 128);
d->sg_buffer=d->sg+SG_OFF;
d->report_all=1;
return(0);
}
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