kdelibs/kcompactdisc/wmlib/plat_linux.c
Ivailo Monev a0dbbaabdf generic: rename merged libraries directories for consistency
Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
2015-10-29 13:57:28 +02:00

756 lines
19 KiB
C

/*
* This file is part of WorkMan, the civilized CD player library
* Copyright (C) 1991-1997 by Steven Grimm <koreth@midwinter.com>
* Copyright (C) by Dirk Försterling <milliByte@DeathsDoor.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*
* Linux-specific drive control routines. Very similar to the Sun module.
*/
#if defined(__linux__)
#include "include/wm_config.h"
#include "include/wm_struct.h"
#include "include/wm_cdtext.h"
#include "include/wm_cdda.h"
#include "include/wm_struct.h"
#include "include/wm_platform.h"
#include "include/wm_cdrom.h"
#include "include/wm_scsi.h"
#include "include/wm_helpers.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
/* Try to get around bug #29274 */
#include <linux/version.h>
#if 0
/* this breaks the build on ia64 and s390 for example.
sys/types.h is already included and should provide __u64.
please tell where we really need this and let's try to find
a working #if case for everyone ... adrian@suse.de */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,50)) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,21) && LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
#undef __GNUC__
typedef unsigned long long __u64;
#endif
#endif
#if defined(BSD_MOUNTTEST)
#include <mntent.h>
#else
/*
* this is for glibc 2.x which defines ust structure in
* ustat.h not stat.h
*/
#ifdef __GLIBC__
#include <sys/ustat.h>
#endif
#endif
#include <sys/time.h>
#include <sys/ioctl.h>
#ifndef __GNUC__
#define __GNUC__ 1
#endif
/* needed for vanilla kernel headers, which do provide __u64 only
for ansi */
#undef __STRICT_ANSI__
/* needed for non-ansi kernel headers */
#define asm __asm__
#define inline __inline__
#include <asm/types.h>
#include <linux/cdrom.h>
#undef asm
#undef inline
#ifdef OSS_SUPPORT
#include <linux/soundcard.h>
#define CD_CHANNEL SOUND_MIXER_CD
#endif
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
#ifdef LINUX_SCSI_PASSTHROUGH
/* this is from <scsi/scsi_ioctl.h> */
# define SCSI_IOCTL_SEND_COMMAND 1
#endif
/*-------------------------------------------------------*
*
*
* CD-ROM drive functions.
*
*
*-------------------------------------------------------*/
int gen_init(struct wm_drive *d)
{
return 0;
}
int gen_open(struct wm_drive *d)
{
if(d->fd > -1) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "plat_open(): [device is open (fd=%d)]\n",
d->fd);
return 0;
}
d->fd = open(d->cd_device, O_RDONLY | O_NONBLOCK);
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "plat_open(): device=%s fd=%d\n",
d->cd_device, d->fd);
if(d->fd < 0)
return -errno;
return 0;
}
int gen_close(struct wm_drive *d)
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "linux_close(): closing the device\n");
close(d->fd);
d->fd = -1;
return 0;
}
/*--------------------------------------------------------------------------*
* Get the current status of the drive: the current play mode, the absolute
* position from start of disc (in frames), and the current track and index
* numbers if the CD is playing or paused.
*--------------------------------------------------------------------------*/
int gen_get_drive_status(struct wm_drive *d, int oldmode, int *mode, int *pos, int *track, int *ind)
{
struct cdrom_subchnl sc;
int ret;
#ifdef SBPCD_HACK
static int prevpos = 0;
#endif
/* Is the device open? */
if (d->fd > -1) {
ret = d->proto.open(d);
if(ret < 0) /* error */
return ret;
if(ret == 1) {
/* retry */
*mode = WM_CDM_UNKNOWN;
return 0;
}
}
/* Try to get rid of the door locking */
/* Don't care about return value. If it */
/* works - fine. If not - ... */
ioctl(d->fd, CDROM_LOCKDOOR, 0);
*mode = WM_CDM_UNKNOWN;
sc.cdsc_format = CDROM_MSF;
if(!ioctl(d->fd, CDROMSUBCHNL, &sc)) {
switch (sc.cdsc_audiostatus) {
case CDROM_AUDIO_PLAY:
*mode = WM_CDM_PLAYING;
*track = sc.cdsc_trk;
*ind = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
#ifdef SBPCD_HACK
if( *pos < prevpos ) {
if( (prevpos - *pos) < 75 ) {
*mode = WM_CDM_TRACK_DONE;
}
}
prevpos = *pos;
#endif
break;
case CDROM_AUDIO_PAUSED:
if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED) {
*mode = WM_CDM_PAUSED;
*track = sc.cdsc_trk;
*ind = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
} else
*mode = WM_CDM_STOPPED;
break;
case CDROM_AUDIO_NO_STATUS:
*mode = WM_CDM_STOPPED;
break;
case CDROM_AUDIO_COMPLETED:
*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
break;
case CDROM_AUDIO_INVALID: /**/
default:
*mode = WM_CDM_UNKNOWN;
break;
}
}
if(WM_CDS_NO_DISC(*mode)) {
/* verify status of drive */
ret = ioctl(d->fd, CDROM_DRIVE_STATUS, 0/* slot */);
if(ret == CDS_DISC_OK)
ret = ioctl(d->fd, CDROM_DISC_STATUS, 0);
switch(ret) {
case CDS_NO_DISC:
*mode = WM_CDM_NO_DISC;
break;
case CDS_TRAY_OPEN:
*mode = WM_CDM_EJECTED;
break;
case CDS_AUDIO:
case CDS_MIXED:
*mode = WM_CDM_STOPPED;
break;
case CDS_DRIVE_NOT_READY:
case CDS_NO_INFO:
case CDS_DATA_1:
case CDS_DATA_2:
case CDS_XA_2_1:
case CDS_XA_2_2:
default:
*mode = WM_CDM_UNKNOWN;
}
}
return 0;
}
/*-------------------------------------*
* Get the number of tracks on the CD.
*-------------------------------------*/
int gen_get_trackcount(struct wm_drive *d, int *tracks)
{
struct cdrom_tochdr hdr;
if(ioctl(d->fd, CDROMREADTOCHDR, &hdr))
return -1;
*tracks = hdr.cdth_trk1;
return 0;
}
/*---------------------------------------------------------*
* Get the start time and mode (data or audio) of a track.
*---------------------------------------------------------*/
int gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
{
struct cdrom_tocentry entry;
entry.cdte_track = track;
entry.cdte_format = CDROM_MSF;
if(ioctl(d->fd, CDROMREADTOCENTRY, &entry))
return -1;
*startframe = entry.cdte_addr.msf.minute * 60 * 75 +
entry.cdte_addr.msf.second * 75 +
entry.cdte_addr.msf.frame;
*data = entry.cdte_ctrl & CDROM_DATA_TRACK ? 1 : 0;
return 0;
}
/*-------------------------------------*
* Get the number of frames on the CD.
*-------------------------------------*/
int gen_get_cdlen(struct wm_drive *d, int *frames)
{
int tmp;
return d->proto.get_trackinfo(d, CDROM_LEADOUT, &tmp, frames);
}
/*------------------------------------------------------------*
* Play the CD from one position to another (both in frames.)
*------------------------------------------------------------*/
int gen_play(struct wm_drive *d, int start, int end)
{
struct cdrom_msf msf;
msf.cdmsf_min0 = start / (60*75);
msf.cdmsf_sec0 = (start % (60*75)) / 75;
msf.cdmsf_frame0 = start % 75;
msf.cdmsf_min1 = end / (60*75);
msf.cdmsf_sec1 = (end % (60*75)) / 75;
msf.cdmsf_frame1 = end % 75;
if(ioctl(d->fd, CDROMPLAYMSF, &msf)) {
if(ioctl(d->fd, CDROMSTART))
return -1;
if(ioctl(d->fd, CDROMPLAYMSF, &msf))
return -2;
}
return 0;
}
/*---------------*
* Pause the CD.
*---------------*/
int gen_pause(struct wm_drive *d)
{
return ioctl(d->fd, CDROMPAUSE);
}
/*-------------------------------------------------*
* Resume playing the CD (assuming it was paused.)
*-------------------------------------------------*/
int gen_resume(struct wm_drive *d)
{
return ioctl(d->fd, CDROMRESUME);
}
/*--------------*
* Stop the CD.
*--------------*/
int gen_stop(struct wm_drive *d)
{
return ioctl(d->fd, CDROMSTOP);
}
/*----------------------------------------*
* Eject the current CD, if there is one.
*----------------------------------------*/
int gen_eject(struct wm_drive *d)
{
struct stat stbuf;
#if !defined(BSD_MOUNTTEST)
struct ustat ust;
#else
struct mntent *mnt;
FILE *fp;
#endif
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "ejecting?\n");
if(fstat(d->fd, &stbuf) != 0) {
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "that weird fstat() thingy\n");
return -2;
}
/* Is this a mounted filesystem? */
#if !defined(BSD_MOUNTTEST)
if (ustat(stbuf.st_rdev, &ust) == 0)
return -3;
#else
/*
* This is the same test as in the WorkBone interface.
* I should eliminate it there, because there is no need
* for it in the UI
*/
/* check if drive is mounted (from Mark Buckaway's cdplayer code) */
/* Changed it again (look at XPLAYCD from ???? */
/* It's better to check the device name rather than one device is */
/* mounted as iso9660. That prevents "no playing" if you have more*/
/* than one CD-ROM, and one of them is mounted, but it's not the */
/* audio CD -dirk */
if((fp = setmntent (MOUNTED, "r")) == NULL) {
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "Could not open %s: %s\n",
MOUNTED, strerror (errno));
return -3;
}
while((mnt = getmntent (fp)) != NULL) {
if(strcmp (mnt->mnt_fsname, d->cd_device) == 0) {
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS,
"CDROM already mounted (according to mtab). Operation aborted.\n");
endmntent (fp);
return -3;
}
}
endmntent (fp);
#endif /* BSD_MOUNTTEST */
ioctl(d->fd, CDROM_LOCKDOOR, 0);
if(ioctl(d->fd, CDROMEJECT)) {
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "eject failed (%s).\n", strerror(errno));
return -1;
}
/*------------------
* Things in "foobar_one" are left over from 1.4b3
* I put them here for further observation. In 1.4b3, however,
* that workaround didn't help at least for /dev/sbpcd
* (The tray closed just after ejecting because re-opening the
* device causes the tray to close)
*------------------*/
#ifdef foobar_one
extern int intermittent_dev
/*
* Some drives (drivers?) won't recognize a new CD if we leave the
* device open.
*/
if(intermittent_dev)
d->proto.close(d);
#endif
return 0;
}
int gen_closetray(struct wm_drive *d)
{
#ifdef CDROMCLOSETRAY
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS, "CDROMCLOSETRAY closing tray...\n");
return ioctl(d->fd, CDROMCLOSETRAY);
#else
return -1;
#endif /* CDROMCLOSETRAY */
}
static int min_volume = 0, max_volume = 255;
/*------------------------------------------------------------------------*
* scale_volume(vol, max)
*
* Return a volume value suitable for passing to the CD-ROM drive. "vol"
* is a volume slider setting; "max" is the slider's maximum value.
* This is not used if sound card support is enabled.
*
*------------------------------------------------------------------------*/
static int scale_volume(int vol, int max)
{
#ifdef CURVED_VOLUME
return ((max * max - (max - vol) * (max - vol)) *
track_info_status(max_volume - min_volume) / (max * max) + min_volume);
#else
return ((vol * (max_volume - min_volume)) / max + min_volume);
#endif
}
static int unscale_volume(int vol, int max)
{
#ifdef CURVED_VOLUME
/* FIXME do it simpler */
int tmp = (((max_volume - min_volume - vol) * max * max) - (vol + min_volume));
return max - sqrt((tmp/(max_volume - min_volume)));
#else
return (((vol - min_volume) * max) / (max_volume - min_volume));
#endif
}
/*---------------------------------------------------------------------*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*---------------------------------------------------------------------*/
int gen_set_volume(struct wm_drive *d, int left, int right)
{
struct cdrom_volctrl v;
v.channel0 = v.channel2 = left < 0 ? 0 : left > 255 ? 255 : left;
v.channel1 = v.channel3 = right < 0 ? 0 : right > 255 ? 255 : right;
return (ioctl(d->fd, CDROMVOLCTRL, &v));
}
/*---------------------------------------------------------------------*
* Read the volume from the drive, if available. Each channel
* ranges from 0 to 100, with -1 indicating data not available.
*---------------------------------------------------------------------*/
int gen_get_volume(struct wm_drive *d, int *left, int *right)
{
struct cdrom_volctrl v;
#if defined(CDROMVOLREAD)
if(!ioctl(d->fd, CDROMVOLREAD, &v)) {
*left = (v.channel0 + v.channel2)/2;
*right = (v.channel1 + v.channel3)/2;
} else
#endif
/* Suns, HPs, Linux, NEWS can't read the volume; oh well */
*left = *right = -1;
return 0;
}
int gen_scale_volume(int *left, int *right)
{
/* Adjust the volume to make up for the CD-ROM drive's weirdness. */
*left = scale_volume(*left, 100);
*right = scale_volume(*right, 100);
return 0;
}
int gen_unscale_volume(int *left, int *right)
{
*left = unscale_volume(*left, 100);
*right = unscale_volume(*right, 100);
return 0;
}
/*---------------------------------------------*
* Send an arbitrary SCSI command to a device.
*---------------------------------------------*/
int gen_scsi(struct wm_drive *d, unsigned char *cdb, int cdblen,
void *retbuf, int retbuflen, int getreply)
{
int ret;
#ifdef LINUX_SCSI_PASSTHROUGH
char *cmd;
int cmdsize;
cmdsize = 2 * sizeof(int);
if(retbuf) {
if (getreply)
cmdsize += max(cdblen, retbuflen);
else
cmdsize += (cdblen + retbuflen);
} else {
cmdsize += cdblen;
}
cmd = malloc(cmdsize);
if(cmd == NULL) {
return -ENOMEM;
}
((int*)cmd)[0] = cdblen + ((retbuf && !getreply) ? retbuflen : 0);
((int*)cmd)[1] = ((retbuf && getreply) ? retbuflen : 0);
memcpy(cmd + 2*sizeof(int), cdb, cdblen);
if(retbuf && !getreply)
memcpy(cmd + 2*sizeof(int) + cdblen, retbuf, retbuflen);
if(ioctl(d->fd, SCSI_IOCTL_SEND_COMMAND, cmd)) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%s: ioctl(SCSI_IOCTL_SEND_COMMAND) failure\n", __FILE__);
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "command buffer is:\n");
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%02x %02x %02x %02x %02x %02x\n",
cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5]);
free(cmd);
return -1;
}
if(retbuf && getreply)
memcpy(retbuf, cmd + 2*sizeof(int), retbuflen);
free(cmd);
return 0;
#else /* Linux SCSI passthrough*/
/*----------------------------------------*
* send packet over cdrom interface
* kernel >= 2.2.16
*----------------------------------------*/
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,2,15))
struct cdrom_generic_command cdc;
struct request_sense sense;
int capability;
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wm_scsi over CDROM_SEND_PACKET entered\n");
capability = ioctl(d->fd, CDROM_GET_CAPABILITY);
if(!(capability & CDC_GENERIC_PACKET)) {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS,
"your CDROM or/and kernel does not support CDC_GENERIC_PACKET ...\n");
return -1;
}
memset(&cdc, 0, sizeof(struct cdrom_generic_command));
memset(&sense, 0, sizeof(struct request_sense));
memcpy(cdc.cmd, cdb, cdblen);
cdc.buffer = retbuf;
cdc.buflen = retbuflen;
cdc.stat = 0;
cdc.sense = &sense;
cdc.data_direction = getreply?CGC_DATA_READ:CGC_DATA_WRITE;
/* sendpacket_over_cdrom_interface() */
if((ret = ioctl(d->fd, CDROM_SEND_PACKET, &cdc)))
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS,
"ERROR: CDROM_SEND_PACKET %s\n", strerror(errno));
return ret;
#endif /* CDROM_SEND_PACKET */
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS,
"ERROR: this binary was compiled without CDROM GENERIC PACKET SUPPORT. kernel version < 2.2.16?\n");
wm_lib_message(WM_MSG_LEVEL_ERROR|WM_MSG_CLASS,
"ERROR: if you have a SCSI CDROM, rebuild it with a #define LINUX_SCSI_PASSTHROUGH\n");
return -1;
#endif
}
#if 0
#define CDROM_LBA 0x01 /* "logical block": first frame is #0 */
#define CDROMREADAUDIO 0x530e /* (struct cdrom_read_audio) */
#define CD_MSF_OFFSET 150 /* MSF numbering offset of first frame */
/* This struct is used by the CDROMREADAUDIO ioctl */
struct cdrom_read_audio
{
union {
struct {
unsigned char minute;
unsigned char second;
unsigned char frame;
} msf;
signed int lba;
} addr; /* frame address */
unsigned char addr_format; /* CDROM_LBA or CDROM_MSF */
signed int nframes; /* number of 2352-byte-frames to read at once */
unsigned char *buf; /* frame buffer (size: nframes*2352 bytes) */
};
#define CDDABLKSIZE 2352
#endif
int gen_cdda_init(struct wm_drive *d)
{
return 0;
}
/*
* Initialize the CDDA data buffer and open the appropriate device.
*
*/
int gen_cdda_open(struct wm_drive *d)
{
int i;
struct cdrom_read_audio cdda;
if (d->fd > -1)
return -1;
for (i = 0; i < d->numblocks; i++) {
d->blocks[i].buflen = d->frames_at_once * CD_FRAMESIZE_RAW;
d->blocks[i].buf = malloc(d->blocks[i].buflen);
if (!d->blocks[i].buf) {
ERRORLOG("plat_cdda_open: ENOMEM\n");
return -ENOMEM;
}
}
cdda.addr_format = CDROM_LBA;
cdda.addr.lba = 200;
cdda.nframes = 1;
cdda.buf = (unsigned char *)d->blocks[0].buf;
d->status = WM_CDM_STOPPED;
if((ioctl(d->fd, CDROMREADAUDIO, &cdda) < 0)) {
if (errno == ENXIO) {
/* CD ejected! */
d->status = WM_CDM_EJECTED;
} else {
/* Sometimes it fails once, dunno why */
d->status = WM_CDM_CDDAERROR;
}
} else {
d->status = WM_CDM_UNKNOWN;
}
return 0;
}
/*
* Read some blocks from the CD. Stop if we hit the end of the current region.
*
* Returns number of bytes read, -1 on error, 0 if stopped for a benign reason.
*/
int gen_cdda_read(struct wm_drive *d, struct wm_cdda_block *block)
{
struct cdrom_read_audio cdda;
if (d->fd < 0)
return -1;
/* Hit the end of the CD, probably. */
if (d->current_position >= d->ending_position) {
block->status = WM_CDM_TRACK_DONE;
return 0;
}
cdda.addr_format = CDROM_LBA;
cdda.addr.lba = d->current_position - CD_MSF_OFFSET;
if (d->ending_position && d->current_position + d->frames_at_once > d->ending_position)
cdda.nframes = d->ending_position - d->current_position;
else
cdda.nframes = d->frames_at_once;
cdda.buf = (unsigned char*)block->buf;
if (ioctl(d->fd, CDROMREADAUDIO, &cdda) < 0) {
if (errno == ENXIO) {
/* CD ejected! */
block->status = WM_CDM_EJECTED;
return 0;
} else {
/* Sometimes it fails once, dunno why */
block->status = WM_CDM_CDDAERROR;
return 0;
}
}
block->track = -1;
block->index = 0;
block->frame = d->current_position;
block->status = WM_CDM_PLAYING;
block->buflen = cdda.nframes * CD_FRAMESIZE_RAW;
d->current_position = d->current_position + cdda.nframes;
return block->buflen;
}
/*
* Close the CD-ROM device in preparation for exiting.
*/
int gen_cdda_close(struct wm_drive *d)
{
int i;
if (d->fd < 0)
return -1;
for (i = 0; i < d->numblocks; i++) {
free(d->blocks[i].buf);
d->blocks[i].buf = 0;
d->blocks[i].buflen = 0;
}
return 0;
}
#endif /* __linux__ */