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optcd.c
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/* linux/drivers/cdrom/optcd.c - Optics Storage 8000 AT CDROM driver
$Id: optcd.c,v 1.11 1997/01/26 07:13:00 davem Exp $
Copyright (C) 1995 Leo Spiekman ([email protected])
Based on Aztech CD268 CDROM driver by Werner Zimmermann and preworks
by Eberhard Moenkeberg ([email protected]).
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 2, 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* Revision history
14-5-95 v0.0 Plays sound tracks. No reading of data CDs yet.
Detection of disk change doesn't work.
21-5-95 v0.1 First ALPHA version. CD can be mounted. The
device major nr is borrowed from the Aztech
driver. Speed is around 240 kb/s, as measured
with "time dd if=/dev/cdrom of=/dev/null \
bs=2048 count=4096".
24-6-95 v0.2 Reworked the #defines for the command codes
and the like, as well as the structure of
the hardware communication protocol, to
reflect the "official" documentation, kindly
supplied by C.K. Tan, Optics Storage Pte. Ltd.
Also tidied up the state machine somewhat.
28-6-95 v0.3 Removed the ISP-16 interface code, as this
should go into its own driver. The driver now
has its own major nr.
Disk change detection now seems to work, too.
This version became part of the standard
kernel as of version 1.3.7
24-9-95 v0.4 Re-inserted ISP-16 interface code which I
copied from sjcd.c, with a few changes.
Updated README.optcd. Submitted for
inclusion in 1.3.21
29-9-95 v0.4a Fixed bug that prevented compilation as module
25-10-95 v0.5 Started multisession code. Implementation
copied from Werner Zimmermann, who copied it
from Heiko Schlittermann's mcdx.
17-1-96 v0.6 Multisession works; some cleanup too.
18-4-96 v0.7 Increased some timing constants;
thanks to Luke McFarlane. Also tidied up some
printk behaviour. ISP16 initialization
is now handled by a separate driver.
09-11-99 Make kernel-parameter implementation work with 2.3.x
Removed init_module & cleanup_module in favor of
module_init & module_exit.
Torben Mathiasen <[email protected]>
*/
/* Includes */
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/blkdev.h>
#include <linux/cdrom.h>
#include "optcd.h"
#include <asm/uaccess.h>
#define MAJOR_NR OPTICS_CDROM_MAJOR
#define QUEUE (opt_queue)
#define CURRENT elv_next_request(opt_queue)
/* Debug support */
/* Don't forget to add new debug flags here. */
#if DEBUG_DRIVE_IF | DEBUG_VFS | DEBUG_CONV | DEBUG_TOC | \
DEBUG_BUFFERS | DEBUG_REQUEST | DEBUG_STATE | DEBUG_MULTIS
#define DEBUG(x) debug x
static void debug(int debug_this, const char* fmt, ...)
{
char s[1024];
va_list args;
if (!debug_this)
return;
va_start(args, fmt);
vsprintf(s, fmt, args);
printk(KERN_DEBUG "optcd: %s\n", s);
va_end(args);
}
#else
#define DEBUG(x)
#endif
/* Drive hardware/firmware characteristics
Identifiers in accordance with Optics Storage documentation */
#define optcd_port optcd /* Needed for the modutils. */
static short optcd_port = OPTCD_PORTBASE; /* I/O base of drive. */
module_param(optcd_port, short, 0);
/* Drive registers, read */
#define DATA_PORT optcd_port /* Read data/status */
#define STATUS_PORT optcd_port+1 /* Indicate data/status availability */
/* Drive registers, write */
#define COMIN_PORT optcd_port /* For passing command/parameter */
#define RESET_PORT optcd_port+1 /* Write anything and wait 0.5 sec */
#define HCON_PORT optcd_port+2 /* Host Xfer Configuration */
/* Command completion/status read from DATA register */
#define ST_DRVERR 0x80
#define ST_DOOR_OPEN 0x40
#define ST_MIXEDMODE_DISK 0x20
#define ST_MODE_BITS 0x1c
#define ST_M_STOP 0x00
#define ST_M_READ 0x04
#define ST_M_AUDIO 0x04
#define ST_M_PAUSE 0x08
#define ST_M_INITIAL 0x0c
#define ST_M_ERROR 0x10
#define ST_M_OTHERS 0x14
#define ST_MODE2TRACK 0x02
#define ST_DSK_CHG 0x01
#define ST_L_LOCK 0x01
#define ST_CMD_OK 0x00
#define ST_OP_OK 0x01
#define ST_PA_OK 0x02
#define ST_OP_ERROR 0x05
#define ST_PA_ERROR 0x06
/* Error codes (appear as command completion code from DATA register) */
/* Player related errors */
#define ERR_ILLCMD 0x11 /* Illegal command to player module */
#define ERR_ILLPARM 0x12 /* Illegal parameter to player module */
#define ERR_SLEDGE 0x13
#define ERR_FOCUS 0x14
#define ERR_MOTOR 0x15
#define ERR_RADIAL 0x16
#define ERR_PLL 0x17 /* PLL lock error */
#define ERR_SUB_TIM 0x18 /* Subcode timeout error */
#define ERR_SUB_NF 0x19 /* Subcode not found error */
#define ERR_TRAY 0x1a
#define ERR_TOC 0x1b /* Table of Contents read error */
#define ERR_JUMP 0x1c
/* Data errors */
#define ERR_MODE 0x21
#define ERR_FORM 0x22
#define ERR_HEADADDR 0x23 /* Header Address not found */
#define ERR_CRC 0x24
#define ERR_ECC 0x25 /* Uncorrectable ECC error */
#define ERR_CRC_UNC 0x26 /* CRC error and uncorrectable error */
#define ERR_ILLBSYNC 0x27 /* Illegal block sync error */
#define ERR_VDST 0x28 /* VDST not found */
/* Timeout errors */
#define ERR_READ_TIM 0x31 /* Read timeout error */
#define ERR_DEC_STP 0x32 /* Decoder stopped */
#define ERR_DEC_TIM 0x33 /* Decoder interrupt timeout error */
/* Function abort codes */
#define ERR_KEY 0x41 /* Key -Detected abort */
#define ERR_READ_FINISH 0x42 /* Read Finish */
/* Second Byte diagnostic codes */
#define ERR_NOBSYNC 0x01 /* No block sync */
#define ERR_SHORTB 0x02 /* Short block */
#define ERR_LONGB 0x03 /* Long block */
#define ERR_SHORTDSP 0x04 /* Short DSP word */
#define ERR_LONGDSP 0x05 /* Long DSP word */
/* Status availability flags read from STATUS register */
#define FL_EJECT 0x20
#define FL_WAIT 0x10 /* active low */
#define FL_EOP 0x08 /* active low */
#define FL_STEN 0x04 /* Status available when low */
#define FL_DTEN 0x02 /* Data available when low */
#define FL_DRQ 0x01 /* active low */
#define FL_RESET 0xde /* These bits are high after a reset */
#define FL_STDT (FL_STEN|FL_DTEN)
/* Transfer mode, written to HCON register */
#define HCON_DTS 0x08
#define HCON_SDRQB 0x04
#define HCON_LOHI 0x02
#define HCON_DMA16 0x01
/* Drive command set, written to COMIN register */
/* Quick response commands */
#define COMDRVST 0x20 /* Drive Status Read */
#define COMERRST 0x21 /* Error Status Read */
#define COMIOCTLISTAT 0x22 /* Status Read; reset disk changed bit */
#define COMINITSINGLE 0x28 /* Initialize Single Speed */
#define COMINITDOUBLE 0x29 /* Initialize Double Speed */
#define COMUNLOCK 0x30 /* Unlock */
#define COMLOCK 0x31 /* Lock */
#define COMLOCKST 0x32 /* Lock/Unlock Status */
#define COMVERSION 0x40 /* Get Firmware Revision */
#define COMVOIDREADMODE 0x50 /* Void Data Read Mode */
/* Read commands */
#define COMFETCH 0x60 /* Prefetch Data */
#define COMREAD 0x61 /* Read */
#define COMREADRAW 0x62 /* Read Raw Data */
#define COMREADALL 0x63 /* Read All 2646 Bytes */
/* Player control commands */
#define COMLEADIN 0x70 /* Seek To Lead-in */
#define COMSEEK 0x71 /* Seek */
#define COMPAUSEON 0x80 /* Pause On */
#define COMPAUSEOFF 0x81 /* Pause Off */
#define COMSTOP 0x82 /* Stop */
#define COMOPEN 0x90 /* Open Tray Door */
#define COMCLOSE 0x91 /* Close Tray Door */
#define COMPLAY 0xa0 /* Audio Play */
#define COMPLAY_TNO 0xa2 /* Audio Play By Track Number */
#define COMSUBQ 0xb0 /* Read Sub-q Code */
#define COMLOCATION 0xb1 /* Read Head Position */
/* Audio control commands */
#define COMCHCTRL 0xc0 /* Audio Channel Control */
/* Miscellaneous (test) commands */
#define COMDRVTEST 0xd0 /* Write Test Bytes */
#define COMTEST 0xd1 /* Diagnostic Test */
/* Low level drive interface. Only here we do actual I/O
Waiting for status / data available */
/* Busy wait until FLAG goes low. Return 0 on timeout. */
static inline int flag_low(int flag, unsigned long timeout)
{
int flag_high;
unsigned long count = 0;
while ((flag_high = (inb(STATUS_PORT) & flag)))
if (++count >= timeout)
break;
DEBUG((DEBUG_DRIVE_IF, "flag_low 0x%x count %ld%s",
flag, count, flag_high ? " timeout" : ""));
return !flag_high;
}
/* Timed waiting for status or data */
static int sleep_timeout; /* max # of ticks to sleep */
static DECLARE_WAIT_QUEUE_HEAD(waitq);
static void sleep_timer(unsigned long data);
static DEFINE_TIMER(delay_timer, sleep_timer, 0, 0);
static DEFINE_SPINLOCK(optcd_lock);
static struct request_queue *opt_queue;
/* Timer routine: wake up when desired flag goes low,
or when timeout expires. */
static void sleep_timer(unsigned long data)
{
int flags = inb(STATUS_PORT) & FL_STDT;
if (flags == FL_STDT && --sleep_timeout > 0) {
mod_timer(&delay_timer, jiffies + HZ/100); /* multi-statement macro */
} else
wake_up(&waitq);
}
/* Sleep until FLAG goes low. Return 0 on timeout or wrong flag low. */
static int sleep_flag_low(int flag, unsigned long timeout)
{
int flag_high;
DEBUG((DEBUG_DRIVE_IF, "sleep_flag_low"));
sleep_timeout = timeout;
flag_high = inb(STATUS_PORT) & flag;
if (flag_high && sleep_timeout > 0) {
mod_timer(&delay_timer, jiffies + HZ/100);
sleep_on(&waitq);
flag_high = inb(STATUS_PORT) & flag;
}
DEBUG((DEBUG_DRIVE_IF, "flag 0x%x count %ld%s",
flag, timeout, flag_high ? " timeout" : ""));
return !flag_high;
}
/* Low level drive interface. Only here we do actual I/O
Sending commands and parameters */
/* Errors in the command protocol */
#define ERR_IF_CMD_TIMEOUT 0x100
#define ERR_IF_ERR_TIMEOUT 0x101
#define ERR_IF_RESP_TIMEOUT 0x102
#define ERR_IF_DATA_TIMEOUT 0x103
#define ERR_IF_NOSTAT 0x104
/* Send command code. Return <0 indicates error */
static int send_cmd(int cmd)
{
unsigned char ack;
DEBUG((DEBUG_DRIVE_IF, "sending command 0x%02x\n", cmd));
outb(HCON_DTS, HCON_PORT); /* Enable Suspend Data Transfer */
outb(cmd, COMIN_PORT); /* Send command code */
if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */
return -ERR_IF_CMD_TIMEOUT;
ack = inb(DATA_PORT); /* read command acknowledge */
outb(HCON_SDRQB, HCON_PORT); /* Disable Suspend Data Transfer */
return ack==ST_OP_OK ? 0 : -ack;
}
/* Send command parameters. Return <0 indicates error */
static int send_params(struct cdrom_msf *params)
{
unsigned char ack;
DEBUG((DEBUG_DRIVE_IF, "sending parameters"
" %02x:%02x:%02x"
" %02x:%02x:%02x",
params->cdmsf_min0,
params->cdmsf_sec0,
params->cdmsf_frame0,
params->cdmsf_min1,
params->cdmsf_sec1,
params->cdmsf_frame1));
outb(params->cdmsf_min0, COMIN_PORT);
outb(params->cdmsf_sec0, COMIN_PORT);
outb(params->cdmsf_frame0, COMIN_PORT);
outb(params->cdmsf_min1, COMIN_PORT);
outb(params->cdmsf_sec1, COMIN_PORT);
outb(params->cdmsf_frame1, COMIN_PORT);
if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */
return -ERR_IF_CMD_TIMEOUT;
ack = inb(DATA_PORT); /* read command acknowledge */
return ack==ST_PA_OK ? 0 : -ack;
}
/* Send parameters for SEEK command. Return <0 indicates error */
static int send_seek_params(struct cdrom_msf *params)
{
unsigned char ack;
DEBUG((DEBUG_DRIVE_IF, "sending seek parameters"
" %02x:%02x:%02x",
params->cdmsf_min0,
params->cdmsf_sec0,
params->cdmsf_frame0));
outb(params->cdmsf_min0, COMIN_PORT);
outb(params->cdmsf_sec0, COMIN_PORT);
outb(params->cdmsf_frame0, COMIN_PORT);
if (!flag_low(FL_STEN, BUSY_TIMEOUT)) /* Wait for status */
return -ERR_IF_CMD_TIMEOUT;
ack = inb(DATA_PORT); /* read command acknowledge */
return ack==ST_PA_OK ? 0 : -ack;
}
/* Wait for command execution status. Choice between busy waiting
and sleeping. Return value <0 indicates timeout. */
static inline int get_exec_status(int busy_waiting)
{
unsigned char exec_status;
if (busy_waiting
? !flag_low(FL_STEN, BUSY_TIMEOUT)
: !sleep_flag_low(FL_STEN, SLEEP_TIMEOUT))
return -ERR_IF_CMD_TIMEOUT;
exec_status = inb(DATA_PORT);
DEBUG((DEBUG_DRIVE_IF, "returned exec status 0x%02x", exec_status));
return exec_status;
}
/* Wait busy for extra byte of data that a command returns.
Return value <0 indicates timeout. */
static inline int get_data(int short_timeout)
{
unsigned char data;
if (!flag_low(FL_STEN, short_timeout ? FAST_TIMEOUT : BUSY_TIMEOUT))
return -ERR_IF_DATA_TIMEOUT;
data = inb(DATA_PORT);
DEBUG((DEBUG_DRIVE_IF, "returned data 0x%02x", data));
return data;
}
/* Returns 0 if failed */
static int reset_drive(void)
{
unsigned long count = 0;
int flags;
DEBUG((DEBUG_DRIVE_IF, "reset drive"));
outb(0, RESET_PORT);
while (++count < RESET_WAIT)
inb(DATA_PORT);
count = 0;
while ((flags = (inb(STATUS_PORT) & FL_RESET)) != FL_RESET)
if (++count >= BUSY_TIMEOUT)
break;
DEBUG((DEBUG_DRIVE_IF, "reset %s",
flags == FL_RESET ? "succeeded" : "failed"));
if (flags != FL_RESET)
return 0; /* Reset failed */
outb(HCON_SDRQB, HCON_PORT); /* Disable Suspend Data Transfer */
return 1; /* Reset succeeded */
}
/* Facilities for asynchronous operation */
/* Read status/data availability flags FL_STEN and FL_DTEN */
static inline int stdt_flags(void)
{
return inb(STATUS_PORT) & FL_STDT;
}
/* Fetch status that has previously been waited for. <0 means not available */
static inline int fetch_status(void)
{
unsigned char status;
if (inb(STATUS_PORT) & FL_STEN)
return -ERR_IF_NOSTAT;
status = inb(DATA_PORT);
DEBUG((DEBUG_DRIVE_IF, "fetched exec status 0x%02x", status));
return status;
}
/* Fetch data that has previously been waited for. */
static inline void fetch_data(char *buf, int n)
{
insb(DATA_PORT, buf, n);
DEBUG((DEBUG_DRIVE_IF, "fetched 0x%x bytes", n));
}
/* Flush status and data fifos */
static inline void flush_data(void)
{
while ((inb(STATUS_PORT) & FL_STDT) != FL_STDT)
inb(DATA_PORT);
DEBUG((DEBUG_DRIVE_IF, "flushed fifos"));
}
/* Command protocol */
/* Send a simple command and wait for response. Command codes < COMFETCH
are quick response commands */
static inline int exec_cmd(int cmd)
{
int ack = send_cmd(cmd);
if (ack < 0)
return ack;
return get_exec_status(cmd < COMFETCH);
}
/* Send a command with parameters. Don't wait for the response,
* which consists of data blocks read from the CD. */
static inline int exec_read_cmd(int cmd, struct cdrom_msf *params)
{
int ack = send_cmd(cmd);
if (ack < 0)
return ack;
return send_params(params);
}
/* Send a seek command with parameters and wait for response */
static inline int exec_seek_cmd(int cmd, struct cdrom_msf *params)
{
int ack = send_cmd(cmd);
if (ack < 0)
return ack;
ack = send_seek_params(params);
if (ack < 0)
return ack;
return 0;
}
/* Send a command with parameters and wait for response */
static inline int exec_long_cmd(int cmd, struct cdrom_msf *params)
{
int ack = exec_read_cmd(cmd, params);
if (ack < 0)
return ack;
return get_exec_status(0);
}
/* Address conversion routines */
/* Binary to BCD (2 digits) */
static inline void single_bin2bcd(u_char *p)
{
DEBUG((DEBUG_CONV, "bin2bcd %02d", *p));
*p = (*p % 10) | ((*p / 10) << 4);
}
/* Convert entire msf struct */
static void bin2bcd(struct cdrom_msf *msf)
{
single_bin2bcd(&msf->cdmsf_min0);
single_bin2bcd(&msf->cdmsf_sec0);
single_bin2bcd(&msf->cdmsf_frame0);
single_bin2bcd(&msf->cdmsf_min1);
single_bin2bcd(&msf->cdmsf_sec1);
single_bin2bcd(&msf->cdmsf_frame1);
}
/* Linear block address to minute, second, frame form */
#define CD_FPM (CD_SECS * CD_FRAMES) /* frames per minute */
static void lba2msf(int lba, struct cdrom_msf *msf)
{
DEBUG((DEBUG_CONV, "lba2msf %d", lba));
lba += CD_MSF_OFFSET;
msf->cdmsf_min0 = lba / CD_FPM; lba %= CD_FPM;
msf->cdmsf_sec0 = lba / CD_FRAMES;
msf->cdmsf_frame0 = lba % CD_FRAMES;
msf->cdmsf_min1 = 0;
msf->cdmsf_sec1 = 0;
msf->cdmsf_frame1 = 0;
bin2bcd(msf);
}
/* Two BCD digits to binary */
static inline u_char bcd2bin(u_char bcd)
{
DEBUG((DEBUG_CONV, "bcd2bin %x%02x", bcd));
return (bcd >> 4) * 10 + (bcd & 0x0f);
}
static void msf2lba(union cdrom_addr *addr)
{
addr->lba = addr->msf.minute * CD_FPM
+ addr->msf.second * CD_FRAMES
+ addr->msf.frame - CD_MSF_OFFSET;
}
/* Minute, second, frame address BCD to binary or to linear address,
depending on MODE */
static void msf_bcd2bin(union cdrom_addr *addr)
{
addr->msf.minute = bcd2bin(addr->msf.minute);
addr->msf.second = bcd2bin(addr->msf.second);
addr->msf.frame = bcd2bin(addr->msf.frame);
}
/* High level drive commands */
static int audio_status = CDROM_AUDIO_NO_STATUS;
static char toc_uptodate = 0;
static char disk_changed = 1;
/* Get drive status, flagging completion of audio play and disk changes. */
static int drive_status(void)
{
int status;
status = exec_cmd(COMIOCTLISTAT);
DEBUG((DEBUG_DRIVE_IF, "IOCTLISTAT: %03x", status));
if (status < 0)
return status;
if (status == 0xff) /* No status available */
return -ERR_IF_NOSTAT;
if (((status & ST_MODE_BITS) != ST_M_AUDIO) &&
(audio_status == CDROM_AUDIO_PLAY)) {
audio_status = CDROM_AUDIO_COMPLETED;
}
if (status & ST_DSK_CHG) {
toc_uptodate = 0;
disk_changed = 1;
audio_status = CDROM_AUDIO_NO_STATUS;
}
return status;
}
/* Read the current Q-channel info. Also used for reading the
table of contents. qp->cdsc_format must be set on entry to
indicate the desired address format */
static int get_q_channel(struct cdrom_subchnl *qp)
{
int status, d1, d2, d3, d4, d5, d6, d7, d8, d9, d10;
status = drive_status();
if (status < 0)
return status;
qp->cdsc_audiostatus = audio_status;
status = exec_cmd(COMSUBQ);
if (status < 0)
return status;
d1 = get_data(0);
if (d1 < 0)
return d1;
qp->cdsc_adr = d1;
qp->cdsc_ctrl = d1 >> 4;
d2 = get_data(0);
if (d2 < 0)
return d2;
qp->cdsc_trk = bcd2bin(d2);
d3 = get_data(0);
if (d3 < 0)
return d3;
qp->cdsc_ind = bcd2bin(d3);
d4 = get_data(0);
if (d4 < 0)
return d4;
qp->cdsc_reladdr.msf.minute = d4;
d5 = get_data(0);
if (d5 < 0)
return d5;
qp->cdsc_reladdr.msf.second = d5;
d6 = get_data(0);
if (d6 < 0)
return d6;
qp->cdsc_reladdr.msf.frame = d6;
d7 = get_data(0);
if (d7 < 0)
return d7;
/* byte not used */
d8 = get_data(0);
if (d8 < 0)
return d8;
qp->cdsc_absaddr.msf.minute = d8;
d9 = get_data(0);
if (d9 < 0)
return d9;
qp->cdsc_absaddr.msf.second = d9;
d10 = get_data(0);
if (d10 < 0)
return d10;
qp->cdsc_absaddr.msf.frame = d10;
DEBUG((DEBUG_TOC, "%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
d1, d2, d3, d4, d5, d6, d7, d8, d9, d10));
msf_bcd2bin(&qp->cdsc_absaddr);
msf_bcd2bin(&qp->cdsc_reladdr);
if (qp->cdsc_format == CDROM_LBA) {
msf2lba(&qp->cdsc_absaddr);
msf2lba(&qp->cdsc_reladdr);
}
return 0;
}
/* Table of contents handling */
/* Errors in table of contents */
#define ERR_TOC_MISSINGINFO 0x120
#define ERR_TOC_MISSINGENTRY 0x121
struct cdrom_disk_info {
unsigned char first;
unsigned char last;
struct cdrom_msf0 disk_length;
struct cdrom_msf0 first_track;
/* Multisession info: */
unsigned char next;
struct cdrom_msf0 next_session;
struct cdrom_msf0 last_session;
unsigned char multi;
unsigned char xa;
unsigned char audio;
};
static struct cdrom_disk_info disk_info;
#define MAX_TRACKS 111
static struct cdrom_subchnl toc[MAX_TRACKS];
#define QINFO_FIRSTTRACK 100 /* bcd2bin(0xa0) */
#define QINFO_LASTTRACK 101 /* bcd2bin(0xa1) */
#define QINFO_DISKLENGTH 102 /* bcd2bin(0xa2) */
#define QINFO_NEXTSESSION 110 /* bcd2bin(0xb0) */
#define I_FIRSTTRACK 0x01
#define I_LASTTRACK 0x02
#define I_DISKLENGTH 0x04
#define I_NEXTSESSION 0x08
#define I_ALL (I_FIRSTTRACK | I_LASTTRACK | I_DISKLENGTH)
#if DEBUG_TOC
static void toc_debug_info(int i)
{
printk(KERN_DEBUG "#%3d ctl %1x, adr %1x, track %2d index %3d"
" %2d:%02d.%02d %2d:%02d.%02d\n",
i, toc[i].cdsc_ctrl, toc[i].cdsc_adr,
toc[i].cdsc_trk, toc[i].cdsc_ind,
toc[i].cdsc_reladdr.msf.minute,
toc[i].cdsc_reladdr.msf.second,
toc[i].cdsc_reladdr.msf.frame,
toc[i].cdsc_absaddr.msf.minute,
toc[i].cdsc_absaddr.msf.second,
toc[i].cdsc_absaddr.msf.frame);
}
#endif
static int read_toc(void)
{
int status, limit, count;
unsigned char got_info = 0;
struct cdrom_subchnl q_info;
#if DEBUG_TOC
int i;
#endif
DEBUG((DEBUG_TOC, "starting read_toc"));
count = 0;
for (limit = 60; limit > 0; limit--) {
int index;
q_info.cdsc_format = CDROM_MSF;
status = get_q_channel(&q_info);
if (status < 0)
return status;
index = q_info.cdsc_ind;
if (index > 0 && index < MAX_TRACKS
&& q_info.cdsc_trk == 0 && toc[index].cdsc_ind == 0) {
toc[index] = q_info;
DEBUG((DEBUG_TOC, "got %d", index));
if (index < 100)
count++;
switch (q_info.cdsc_ind) {
case QINFO_FIRSTTRACK:
got_info |= I_FIRSTTRACK;
break;
case QINFO_LASTTRACK:
got_info |= I_LASTTRACK;
break;
case QINFO_DISKLENGTH:
got_info |= I_DISKLENGTH;
break;
case QINFO_NEXTSESSION:
got_info |= I_NEXTSESSION;
break;
}
}
if ((got_info & I_ALL) == I_ALL
&& toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute + count
>= toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute + 1)
break;
}
/* Construct disk_info from TOC */
if (disk_info.first == 0) {
disk_info.first = toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute;
disk_info.first_track.minute =
toc[disk_info.first].cdsc_absaddr.msf.minute;
disk_info.first_track.second =
toc[disk_info.first].cdsc_absaddr.msf.second;
disk_info.first_track.frame =
toc[disk_info.first].cdsc_absaddr.msf.frame;
}
disk_info.last = toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute;
disk_info.disk_length.minute =
toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.minute;
disk_info.disk_length.second =
toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.second-2;
disk_info.disk_length.frame =
toc[QINFO_DISKLENGTH].cdsc_absaddr.msf.frame;
disk_info.next_session.minute =
toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.minute;
disk_info.next_session.second =
toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.second;
disk_info.next_session.frame =
toc[QINFO_NEXTSESSION].cdsc_reladdr.msf.frame;
disk_info.next = toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute;
disk_info.last_session.minute =
toc[disk_info.next].cdsc_absaddr.msf.minute;
disk_info.last_session.second =
toc[disk_info.next].cdsc_absaddr.msf.second;
disk_info.last_session.frame =
toc[disk_info.next].cdsc_absaddr.msf.frame;
toc[disk_info.last + 1].cdsc_absaddr.msf.minute =
disk_info.disk_length.minute;
toc[disk_info.last + 1].cdsc_absaddr.msf.second =
disk_info.disk_length.second;
toc[disk_info.last + 1].cdsc_absaddr.msf.frame =
disk_info.disk_length.frame;
#if DEBUG_TOC
for (i = 1; i <= disk_info.last + 1; i++)
toc_debug_info(i);
toc_debug_info(QINFO_FIRSTTRACK);
toc_debug_info(QINFO_LASTTRACK);
toc_debug_info(QINFO_DISKLENGTH);
toc_debug_info(QINFO_NEXTSESSION);
#endif
DEBUG((DEBUG_TOC, "exiting read_toc, got_info %x, count %d",
got_info, count));
if ((got_info & I_ALL) != I_ALL
|| toc[QINFO_FIRSTTRACK].cdsc_absaddr.msf.minute + count
< toc[QINFO_LASTTRACK].cdsc_absaddr.msf.minute + 1)
return -ERR_TOC_MISSINGINFO;
return 0;
}
#ifdef MULTISESSION
static int get_multi_disk_info(void)
{
int sessions, status;
struct cdrom_msf multi_index;
for (sessions = 2; sessions < 10 /* %%for now */; sessions++) {
int count;
for (count = 100; count < MAX_TRACKS; count++)
toc[count].cdsc_ind = 0;
multi_index.cdmsf_min0 = disk_info.next_session.minute;
multi_index.cdmsf_sec0 = disk_info.next_session.second;
multi_index.cdmsf_frame0 = disk_info.next_session.frame;
if (multi_index.cdmsf_sec0 >= 20)
multi_index.cdmsf_sec0 -= 20;
else {
multi_index.cdmsf_sec0 += 40;
multi_index.cdmsf_min0--;
}
DEBUG((DEBUG_MULTIS, "Try %d: %2d:%02d.%02d", sessions,
multi_index.cdmsf_min0,
multi_index.cdmsf_sec0,
multi_index.cdmsf_frame0));
bin2bcd(&multi_index);
multi_index.cdmsf_min1 = 0;
multi_index.cdmsf_sec1 = 0;
multi_index.cdmsf_frame1 = 1;
status = exec_read_cmd(COMREAD, &multi_index);
if (status < 0) {
DEBUG((DEBUG_TOC, "exec_read_cmd COMREAD: %02x",
-status));
break;
}
status = sleep_flag_low(FL_DTEN, MULTI_SEEK_TIMEOUT) ?
0 : -ERR_TOC_MISSINGINFO;
flush_data();
if (status < 0) {
DEBUG((DEBUG_TOC, "sleep_flag_low: %02x", -status));
break;
}
status = read_toc();
if (status < 0) {
DEBUG((DEBUG_TOC, "read_toc: %02x", -status));
break;
}
disk_info.multi = 1;
}
exec_cmd(COMSTOP);
if (status < 0)
return -EIO;
return 0;
}
#endif /* MULTISESSION */
static int update_toc(void)
{
int status, count;
if (toc_uptodate)
return 0;
DEBUG((DEBUG_TOC, "starting update_toc"));
disk_info.first = 0;
for (count = 0; count < MAX_TRACKS; count++)
toc[count].cdsc_ind = 0;
status = exec_cmd(COMLEADIN);
if (status < 0)
return -EIO;
status = read_toc();
if (status < 0) {
DEBUG((DEBUG_TOC, "read_toc: %02x", -status));
return -EIO;
}
/* Audio disk detection. Look at first track. */
disk_info.audio =
(toc[disk_info.first].cdsc_ctrl & CDROM_DATA_TRACK) ? 0 : 1;
/* XA detection */
disk_info.xa = drive_status() & ST_MODE2TRACK;
/* Multisession detection: if we want this, define MULTISESSION */
disk_info.multi = 0;
#ifdef MULTISESSION
if (disk_info.xa)
get_multi_disk_info(); /* Here disk_info.multi is set */
#endif /* MULTISESSION */
if (disk_info.multi)
printk(KERN_WARNING "optcd: Multisession support experimental, "
"see Documentation/cdrom/optcd\n");
DEBUG((DEBUG_TOC, "exiting update_toc"));
toc_uptodate = 1;
return 0;
}
/* Request handling */
static int current_valid(void)
{
return CURRENT &&
CURRENT->cmd == READ &&
CURRENT->sector != -1;
}
/* Buffers for block size conversion. */
#define NOBUF -1
static char buf[CD_FRAMESIZE * N_BUFS];
static volatile int buf_bn[N_BUFS], next_bn;
static volatile int buf_in = 0, buf_out = NOBUF;
static inline void opt_invalidate_buffers(void)
{
int i;
DEBUG((DEBUG_BUFFERS, "executing opt_invalidate_buffers"));
for (i = 0; i < N_BUFS; i++)
buf_bn[i] = NOBUF;
buf_out = NOBUF;
}