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#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/blk.h>
#include <linux/blkpg.h>
#include "scsi.h"
#include "hosts.h"
#include <scsi/scsi_ioctl.h>
#include <linux/cdrom.h>
#include "sr.h"
#if 0
#define DEBUG
#endif
/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
* It is off by default and can be turned on with this module parameter */
static int xa_test = 0;
extern void get_sectorsize(int);
#define IOCTL_RETRIES 3
/* The CDROM is fairly slow, so we need a little extra time */
/* In fact, it is very slow if it has to spin up first */
#define IOCTL_TIMEOUT 30*HZ
/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives
are emulating a SCSI device via the idescsi module, they need to have
CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
{
struct cdrom_tocentry trk0_te, trk1_te;
struct cdrom_tochdr tochdr;
u_char sr_cmd[10];
int ntracks, ret;
if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr)))
return ret;
ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
if (ti->cdti_trk1 == ntracks)
ti->cdti_trk1 = CDROM_LEADOUT;
else
ti->cdti_trk1 ++;
trk0_te.cdte_track = ti->cdti_trk0;
trk0_te.cdte_format = CDROM_MSF;
trk1_te.cdte_track = ti->cdti_trk1;
trk1_te.cdte_format = CDROM_MSF;
if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te)))
return ret;
if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te)))
return ret;
sr_cmd[0] = GPCMD_PLAY_AUDIO_MSF;
sr_cmd[3] = trk0_te.cdte_addr.msf.minute;
sr_cmd[4] = trk0_te.cdte_addr.msf.second;
sr_cmd[5] = trk0_te.cdte_addr.msf.frame;
sr_cmd[6] = trk1_te.cdte_addr.msf.minute;
sr_cmd[7] = trk1_te.cdte_addr.msf.second;
sr_cmd[8] = trk1_te.cdte_addr.msf.frame;
return sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
}
/* We do our own retries because we want to know what the specific
error code is. Normally the UNIT_ATTENTION code will automatically
clear after one error */
int sr_do_ioctl(int target, unsigned char *sr_cmd, void *buffer, unsigned buflength, int quiet, int readwrite, struct request_sense *sense)
{
Scsi_Request *SRpnt;
Scsi_Device *SDev;
struct request *req;
int result, err = 0, retries = 0;
char *bounce_buffer;
SDev = scsi_CDs[target].device;
SRpnt = scsi_allocate_request(scsi_CDs[target].device);
if (!SRpnt) {
printk("Unable to allocate SCSI request in sr_do_ioctl");
return -ENOMEM;
}
SRpnt->sr_data_direction = readwrite;
/* use ISA DMA buffer if necessary */
SRpnt->sr_request.buffer = buffer;
if (buffer && SRpnt->sr_host->unchecked_isa_dma &&
(virt_to_phys(buffer) + buflength - 1 > ISA_DMA_THRESHOLD)) {
bounce_buffer = (char *) scsi_malloc((buflength + 511) & ~511);
if (bounce_buffer == NULL) {
printk("SCSI DMA pool exhausted.");
return -ENOMEM;
}
memcpy(bounce_buffer, (char *) buffer, buflength);
buffer = bounce_buffer;
}
retry:
if (!scsi_block_when_processing_errors(SDev))
return -ENODEV;
scsi_wait_req(SRpnt, (void *) sr_cmd, (void *) buffer, buflength,
IOCTL_TIMEOUT, IOCTL_RETRIES);
req = &SRpnt->sr_request;
if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
scsi_free(SRpnt->sr_buffer, (SRpnt->sr_bufflen + 511) & ~511);
SRpnt->sr_buffer = req->buffer;
}
result = SRpnt->sr_result;
/* Minimal error checking. Ignore cases we know about, and report the rest. */
if (driver_byte(result) != 0) {
switch (SRpnt->sr_sense_buffer[2] & 0xf) {
case UNIT_ATTENTION:
scsi_CDs[target].device->changed = 1;
if (!quiet)
printk(KERN_INFO "sr%d: disc change detected.\n", target);
if (retries++ < 10)
goto retry;
err = -ENOMEDIUM;
break;
case NOT_READY: /* This happens if there is no disc in drive */
if (SRpnt->sr_sense_buffer[12] == 0x04 &&
SRpnt->sr_sense_buffer[13] == 0x01) {
/* sense: Logical unit is in process of becoming ready */
if (!quiet)
printk(KERN_INFO "sr%d: CDROM not ready yet.\n", target);
if (retries++ < 10) {
/* sleep 2 sec and try again */
scsi_sleep(2 * HZ);
goto retry;
} else {
/* 20 secs are enough? */
err = -ENOMEDIUM;
break;
}
}
if (!quiet)
printk(KERN_INFO "sr%d: CDROM not ready. Make sure there is a disc in the drive.\n", target);
#ifdef DEBUG
print_req_sense("sr", SRpnt);
#endif
err = -ENOMEDIUM;
break;
case ILLEGAL_REQUEST:
if (!quiet)
printk(KERN_ERR "sr%d: CDROM (ioctl) reports ILLEGAL "
"REQUEST.\n", target);
if (SRpnt->sr_sense_buffer[12] == 0x20 &&
SRpnt->sr_sense_buffer[13] == 0x00) {
/* sense: Invalid command operation code */
err = -EDRIVE_CANT_DO_THIS;
} else {
err = -EINVAL;
}
#ifdef DEBUG
print_command(sr_cmd);
print_req_sense("sr", SRpnt);
#endif
break;
default:
printk(KERN_ERR "sr%d: CDROM (ioctl) error, command: ", target);
print_command(sr_cmd);
print_req_sense("sr", SRpnt);
err = -EIO;
}
}
if (sense)
memcpy(sense, SRpnt->sr_sense_buffer, sizeof(*sense));
/* Wake up a process waiting for device */
scsi_release_request(SRpnt);
SRpnt = NULL;
return err;
}
/* ---------------------------------------------------------------------- */
/* interface to cdrom.c */
static int test_unit_ready(int minor)
{
u_char sr_cmd[10];
sr_cmd[0] = GPCMD_TEST_UNIT_READY;
sr_cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
((scsi_CDs[minor].device->lun) << 5) : 0;
sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
return sr_do_ioctl(minor, sr_cmd, NULL, 0, 1, SCSI_DATA_NONE, NULL);
}
int sr_tray_move(struct cdrom_device_info *cdi, int pos)
{
u_char sr_cmd[10];
sr_cmd[0] = GPCMD_START_STOP_UNIT;
sr_cmd[1] = (scsi_CDs[MINOR(cdi->dev)].device->scsi_level <= SCSI_2) ?
((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5) : 0;
sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
sr_cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
return sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
}
int sr_lock_door(struct cdrom_device_info *cdi, int lock)
{
return scsi_ioctl(scsi_CDs[MINOR(cdi->dev)].device,
lock ? SCSI_IOCTL_DOORLOCK : SCSI_IOCTL_DOORUNLOCK,
0);
}
int sr_drive_status(struct cdrom_device_info *cdi, int slot)
{
if (CDSL_CURRENT != slot) {
/* we have no changer support */
return -EINVAL;
}
if (0 == test_unit_ready(MINOR(cdi->dev)))
return CDS_DISC_OK;
return CDS_TRAY_OPEN;
}
int sr_disk_status(struct cdrom_device_info *cdi)
{
struct cdrom_tochdr toc_h;
struct cdrom_tocentry toc_e;
int i, rc, have_datatracks = 0;
/* look for data tracks */
if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
toc_e.cdte_track = i;
toc_e.cdte_format = CDROM_LBA;
if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
return CDS_NO_INFO;
if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
have_datatracks = 1;
break;
}
}
if (!have_datatracks)
return CDS_AUDIO;
if (scsi_CDs[MINOR(cdi->dev)].xa_flag)
return CDS_XA_2_1;
else
return CDS_DATA_1;
}
int sr_get_last_session(struct cdrom_device_info *cdi,
struct cdrom_multisession *ms_info)
{
ms_info->addr.lba = scsi_CDs[MINOR(cdi->dev)].ms_offset;
ms_info->xa_flag = scsi_CDs[MINOR(cdi->dev)].xa_flag ||
(scsi_CDs[MINOR(cdi->dev)].ms_offset > 0);
return 0;
}
int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
{
u_char sr_cmd[10];
char buffer[32];
int result;
sr_cmd[0] = GPCMD_READ_SUBCHANNEL;
sr_cmd[1] = (scsi_CDs[MINOR(cdi->dev)].device->scsi_level <= SCSI_2) ?
((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5) : 0;
sr_cmd[2] = 0x40; /* I do want the subchannel info */
sr_cmd[3] = 0x02; /* Give me medium catalog number info */
sr_cmd[4] = sr_cmd[5] = 0;
sr_cmd[6] = 0;
sr_cmd[7] = 0;
sr_cmd[8] = 24;
sr_cmd[9] = 0;
result = sr_do_ioctl(MINOR(cdi->dev), sr_cmd, buffer, 24, 0, SCSI_DATA_READ, NULL);
memcpy(mcn->medium_catalog_number, buffer + 9, 13);
mcn->medium_catalog_number[13] = 0;
return result;
}
int sr_reset(struct cdrom_device_info *cdi)
{
invalidate_buffers(cdi->dev);
return 0;
}
int sr_select_speed(struct cdrom_device_info *cdi, int speed)
{
u_char sr_cmd[MAX_COMMAND_SIZE];
if (speed == 0)
speed = 0xffff; /* set to max */
else
speed *= 177; /* Nx to kbyte/s */
memset(sr_cmd, 0, MAX_COMMAND_SIZE);
sr_cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */
sr_cmd[1] = (scsi_CDs[MINOR(cdi->dev)].device->scsi_level <= SCSI_2) ?
((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5) : 0;
sr_cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */
sr_cmd[3] = speed & 0xff; /* LSB */
if (sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL))
return -EIO;
return 0;
}
/* ----------------------------------------------------------------------- */
/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */
/* because the generic cdrom driver does the user access stuff for us. */
/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */
/* sr_disk_status interface for the generic cdrom driver. */
int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
{
u_char sr_cmd[10];
int result, target = MINOR(cdi->dev);
unsigned char buffer[32];
memset(sr_cmd, 0, sizeof(sr_cmd));
switch (cmd) {
case CDROMREADTOCHDR:
{
struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
sr_cmd[1] = (scsi_CDs[target].device->scsi_level <= SCSI_2) ?
((scsi_CDs[target].device->lun) << 5) : 0;
sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
sr_cmd[8] = 12; /* LSB of length */
result = sr_do_ioctl(target, sr_cmd, buffer, 12, 1, SCSI_DATA_READ, NULL);
tochdr->cdth_trk0 = buffer[2];
tochdr->cdth_trk1 = buffer[3];
break;
}
case CDROMREADTOCENTRY:
{
struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
sr_cmd[1] = (scsi_CDs[target].device->scsi_level <= SCSI_2) ?
((scsi_CDs[target].device->lun) << 5) : 0;
sr_cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
sr_cmd[6] = tocentry->cdte_track;
sr_cmd[8] = 12; /* LSB of length */
result = sr_do_ioctl(target, sr_cmd, buffer, 12, 0, SCSI_DATA_READ, NULL);
tocentry->cdte_ctrl = buffer[5] & 0xf;
tocentry->cdte_adr = buffer[5] >> 4;
tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
if (tocentry->cdte_format == CDROM_MSF) {
tocentry->cdte_addr.msf.minute = buffer[9];
tocentry->cdte_addr.msf.second = buffer[10];
tocentry->cdte_addr.msf.frame = buffer[11];
} else
tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
+ buffer[10]) << 8) + buffer[11];
break;
}
case CDROMPLAYTRKIND: {
struct cdrom_ti* ti = (struct cdrom_ti*)arg;
sr_cmd[0] = GPCMD_PLAYAUDIO_TI;
sr_cmd[1] = (scsi_CDs[target].device->scsi_level <= SCSI_2) ?
(scsi_CDs[target].device->lun << 5) : 0;
sr_cmd[4] = ti->cdti_trk0;
sr_cmd[5] = ti->cdti_ind0;
sr_cmd[7] = ti->cdti_trk1;
sr_cmd[8] = ti->cdti_ind1;
result = sr_do_ioctl(target, sr_cmd, NULL, 0, 0, SCSI_DATA_NONE, NULL);
if (result == -EDRIVE_CANT_DO_THIS)
result = sr_fake_playtrkind(cdi, ti);
break;
}
default:
return -EINVAL;
}
#if 0
if (result)
printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
#endif
return result;
}
/* -----------------------------------------------------------------------
* a function to read all sorts of funny cdrom sectors using the READ_CD
* scsi-3 mmc command
*
* lba: linear block address
* format: 0 = data (anything)
* 1 = audio
* 2 = data (mode 1)
* 3 = data (mode 2)
* 4 = data (mode 2 form1)
* 5 = data (mode 2 form2)
* blksize: 2048 | 2336 | 2340 | 2352
*/
int sr_read_cd(int minor, unsigned char *dest, int lba, int format, int blksize)
{
unsigned char cmd[MAX_COMMAND_SIZE];
#ifdef DEBUG
printk("sr%d: sr_read_cd lba=%d format=%d blksize=%d\n",
minor, lba, format, blksize);
#endif
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = GPCMD_READ_CD; /* READ_CD */
cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
(scsi_CDs[minor].device->lun << 5) : 0;
cmd[1] |= ((format & 7) << 2);
cmd[2] = (unsigned char) (lba >> 24) & 0xff;
cmd[3] = (unsigned char) (lba >> 16) & 0xff;
cmd[4] = (unsigned char) (lba >> 8) & 0xff;
cmd[5] = (unsigned char) lba & 0xff;
cmd[8] = 1;
switch (blksize) {
case 2336:
cmd[9] = 0x58;
break;
case 2340:
cmd[9] = 0x78;
break;
case 2352:
cmd[9] = 0xf8;
break;
default:
cmd[9] = 0x10;
break;
}
return sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ, NULL);
}
/*
* read sectors with blocksizes other than 2048
*/
int sr_read_sector(int minor, int lba, int blksize, unsigned char *dest)
{
unsigned char cmd[MAX_COMMAND_SIZE]; /* the scsi-command */
int rc;
/* we try the READ CD command first... */
if (scsi_CDs[minor].readcd_known) {
rc = sr_read_cd(minor, dest, lba, 0, blksize);
if (-EDRIVE_CANT_DO_THIS != rc)
return rc;
scsi_CDs[minor].readcd_known = 0;
printk("CDROM does'nt support READ CD (0xbe) command\n");
/* fall & retry the other way */
}
/* ... if this fails, we switch the blocksize using MODE SELECT */
if (blksize != scsi_CDs[minor].device->sector_size) {
if (0 != (rc = sr_set_blocklength(minor, blksize)))
return rc;
}
#ifdef DEBUG
printk("sr%d: sr_read_sector lba=%d blksize=%d\n", minor, lba, blksize);
#endif
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = GPCMD_READ_10;
cmd[1] = (scsi_CDs[minor].device->scsi_level <= SCSI_2) ?
(scsi_CDs[minor].device->lun << 5) : 0;
cmd[2] = (unsigned char) (lba >> 24) & 0xff;
cmd[3] = (unsigned char) (lba >> 16) & 0xff;
cmd[4] = (unsigned char) (lba >> 8) & 0xff;
cmd[5] = (unsigned char) lba & 0xff;
cmd[8] = 1;
rc = sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ, NULL);
return rc;
}
/*
* read a sector in raw mode to check the sector format
* ret: 1 == mode2 (XA), 0 == mode1, <0 == error
*/
int sr_is_xa(int minor)
{
unsigned char *raw_sector;
int is_xa;
if (!xa_test)
return 0;
raw_sector = (unsigned char *) scsi_malloc(2048 + 512);
if (!raw_sector)
return -ENOMEM;
if (0 == sr_read_sector(minor, scsi_CDs[minor].ms_offset + 16,
CD_FRAMESIZE_RAW1, raw_sector)) {
is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
} else {
/* read a raw sector failed for some reason. */
is_xa = -1;
}
scsi_free(raw_sector, 2048 + 512);
#ifdef DEBUG
printk("sr%d: sr_is_xa: %d\n", minor, is_xa);
#endif
return is_xa;
}
int sr_dev_ioctl(struct cdrom_device_info *cdi,
unsigned int cmd, unsigned long arg)
{
int target;
target = MINOR(cdi->dev);
switch (cmd) {
case BLKGETSIZE:
return put_user(scsi_CDs[target].capacity, (unsigned long *) arg);
case BLKGETSIZE64:
return put_user((u64)scsi_CDs[target].capacity << 9, (u64 *)arg);
case BLKROSET:
case BLKROGET:
case BLKRASET:
case BLKRAGET:
case BLKFLSBUF:
case BLKSSZGET:
return blk_ioctl(cdi->dev, cmd, arg);
default:
return scsi_ioctl(scsi_CDs[target].device, cmd, (void *) arg);
}
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-indent-level: 4
* c-brace-imaginary-offset: 0
* c-brace-offset: -4
* c-argdecl-indent: 4
* c-label-offset: -4
* c-continued-statement-offset: 4
* c-continued-brace-offset: 0
* indent-tabs-mode: nil
* tab-width: 8
* End:
*/
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