nkeynes@237 | 1 | /**
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nkeynes@489 | 2 | * $Id: linux.c,v 1.9 2007-11-04 05:07:49 nkeynes Exp $
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nkeynes@237 | 3 | *
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nkeynes@342 | 4 | * Linux cd-rom device driver.
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nkeynes@237 | 5 | *
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nkeynes@237 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@237 | 7 | *
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nkeynes@237 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@237 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@237 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@237 | 11 | * (at your option) any later version.
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nkeynes@237 | 12 | *
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nkeynes@237 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@237 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@237 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@237 | 16 | * GNU General Public License for more details.
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nkeynes@237 | 17 | */
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nkeynes@480 | 18 | #include <unistd.h>
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nkeynes@237 | 19 | #include <stdlib.h>
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nkeynes@237 | 20 | #include <stdio.h>
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nkeynes@237 | 21 | #include <string.h>
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nkeynes@237 | 22 | #include <errno.h>
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nkeynes@237 | 23 | #include <linux/cdrom.h>
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nkeynes@237 | 24 | #include <sys/stat.h>
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nkeynes@237 | 25 | #include <sys/ioctl.h>
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nkeynes@464 | 26 | #include <fstab.h>
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nkeynes@464 | 27 | #include <fcntl.h>
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nkeynes@237 | 28 |
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nkeynes@237 | 29 | #include "gdrom/gdrom.h"
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nkeynes@237 | 30 | #include "gdrom/packet.h"
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nkeynes@237 | 31 | #include "dream.h"
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nkeynes@237 | 32 |
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nkeynes@237 | 33 | #define MAXTOCENTRIES 600 /* This is a fairly generous overestimate really */
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nkeynes@237 | 34 | #define MAXTOCSIZE 4 + (MAXTOCENTRIES*11)
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nkeynes@342 | 35 | #define MAX_SECTORS_PER_CALL 1
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nkeynes@237 | 36 |
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nkeynes@237 | 37 | #define MSFTOLBA( m,s,f ) (f + (s*CD_FRAMES) + (m*CD_FRAMES*CD_SECS))
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nkeynes@237 | 38 |
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nkeynes@237 | 39 | static uint32_t inline lbatomsf( uint32_t lba ) {
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nkeynes@237 | 40 | union cdrom_addr addr;
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nkeynes@237 | 41 | lba = lba + CD_MSF_OFFSET;
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nkeynes@237 | 42 | addr.msf.frame = lba % CD_FRAMES;
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nkeynes@237 | 43 | int seconds = lba / CD_FRAMES;
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nkeynes@237 | 44 | addr.msf.second = seconds % CD_SECS;
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nkeynes@237 | 45 | addr.msf.minute = seconds / CD_SECS;
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nkeynes@237 | 46 | return addr.lba;
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nkeynes@237 | 47 | }
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nkeynes@237 | 48 |
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nkeynes@237 | 49 | #define LBATOMSF( lba ) lbatomsf(lba)
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nkeynes@237 | 50 |
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nkeynes@237 | 51 |
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nkeynes@237 | 52 | static gboolean linux_image_is_valid( FILE *f );
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nkeynes@237 | 53 | static gdrom_disc_t linux_open_device( const gchar *filename, FILE *f );
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nkeynes@342 | 54 | static gdrom_error_t linux_read_disc_toc( gdrom_image_t disc );
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nkeynes@342 | 55 | static gdrom_error_t linux_read_sector( gdrom_disc_t disc, uint32_t sector,
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nkeynes@422 | 56 | int mode, unsigned char *buf, uint32_t *length );
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nkeynes@422 | 57 | static gdrom_error_t linux_send_command( int fd, char *cmd, unsigned char *buffer, size_t *buflen,
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nkeynes@237 | 58 | int direction );
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nkeynes@353 | 59 | static int linux_drive_status( gdrom_disc_t disc );
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nkeynes@237 | 60 |
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nkeynes@489 | 61 | struct gdrom_image_class cdrom_device_class = { "Linux", NULL,
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nkeynes@489 | 62 | linux_image_is_valid, linux_open_device };
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nkeynes@464 | 63 | GList *gdrom_get_native_devices(void)
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nkeynes@464 | 64 | {
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nkeynes@464 | 65 | GList *list = NULL;
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nkeynes@464 | 66 | struct fstab *ent;
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nkeynes@464 | 67 | struct stat st;
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nkeynes@464 | 68 | setfsent();
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nkeynes@464 | 69 | while( (ent = getfsent()) != NULL ) {
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nkeynes@464 | 70 | if( (stat(ent->fs_spec, &st) != -1) &&
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nkeynes@464 | 71 | S_ISBLK(st.st_mode) ) {
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nkeynes@464 | 72 | /* Got a valid block device - is it a CDROM? */
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nkeynes@464 | 73 | int fd = open(ent->fs_spec, O_RDONLY|O_NONBLOCK);
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nkeynes@464 | 74 | if( fd == -1 )
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nkeynes@464 | 75 | continue;
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nkeynes@464 | 76 | int caps = ioctl(fd, CDROM_GET_CAPABILITY);
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nkeynes@464 | 77 | if( caps != -1 ) {
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nkeynes@464 | 78 | /* Appears to support CDROM functions */
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nkeynes@464 | 79 | list = g_list_append( list, g_strdup(ent->fs_spec) );
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nkeynes@464 | 80 | }
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nkeynes@464 | 81 | close(fd);
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nkeynes@464 | 82 | }
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nkeynes@464 | 83 | }
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nkeynes@464 | 84 | return list;
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nkeynes@464 | 85 | }
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nkeynes@237 | 86 |
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nkeynes@237 | 87 | static gboolean linux_image_is_valid( FILE *f )
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nkeynes@237 | 88 | {
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nkeynes@237 | 89 | struct stat st;
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nkeynes@237 | 90 | struct cdrom_tochdr tochdr;
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nkeynes@237 | 91 |
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nkeynes@237 | 92 | if( fstat(fileno(f), &st) == -1 ) {
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nkeynes@237 | 93 | return FALSE; /* can't stat device? */
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nkeynes@237 | 94 | }
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nkeynes@237 | 95 | if( !S_ISBLK(st.st_mode) ) {
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nkeynes@237 | 96 | return FALSE; /* Not a block device */
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nkeynes@237 | 97 | }
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nkeynes@237 | 98 |
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nkeynes@237 | 99 | if( ioctl(fileno(f), CDROMREADTOCHDR, &tochdr) == -1 ) {
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nkeynes@237 | 100 | /* Quick check that this is really a CD */
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nkeynes@237 | 101 | return FALSE;
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nkeynes@237 | 102 | }
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nkeynes@237 | 103 |
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nkeynes@237 | 104 | return TRUE;
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nkeynes@237 | 105 | }
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nkeynes@237 | 106 |
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nkeynes@237 | 107 | static gdrom_disc_t linux_open_device( const gchar *filename, FILE *f )
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nkeynes@237 | 108 | {
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nkeynes@237 | 109 | gdrom_disc_t disc;
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nkeynes@237 | 110 |
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nkeynes@464 | 111 | disc = gdrom_image_new(filename, f);
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nkeynes@237 | 112 | if( disc == NULL ) {
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nkeynes@237 | 113 | ERROR("Unable to allocate memory!");
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nkeynes@237 | 114 | return NULL;
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nkeynes@237 | 115 | }
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nkeynes@237 | 116 |
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nkeynes@342 | 117 | gdrom_error_t status = linux_read_disc_toc( (gdrom_image_t)disc );
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nkeynes@237 | 118 | if( status != 0 ) {
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nkeynes@468 | 119 | gdrom_image_destroy_no_close(disc);
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nkeynes@237 | 120 | if( status == 0xFFFF ) {
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nkeynes@237 | 121 | ERROR("Unable to load disc table of contents (%s)", strerror(errno));
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nkeynes@237 | 122 | } else {
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nkeynes@237 | 123 | ERROR("Unable to load disc table of contents (sense %d,%d)",
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nkeynes@237 | 124 | status &0xFF, status >> 8 );
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nkeynes@237 | 125 | }
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nkeynes@237 | 126 | return NULL;
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nkeynes@237 | 127 | }
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nkeynes@342 | 128 | disc->read_sector = linux_read_sector;
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nkeynes@353 | 129 | disc->drive_status = linux_drive_status;
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nkeynes@342 | 130 | ((gdrom_image_t)disc)->disc_type = IDE_DISC_CDROM;
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nkeynes@237 | 131 | return disc;
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nkeynes@237 | 132 | }
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nkeynes@237 | 133 |
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nkeynes@353 | 134 | static int linux_drive_status( gdrom_disc_t disc )
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nkeynes@353 | 135 | {
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nkeynes@353 | 136 | int fd = fileno(((gdrom_image_t)disc)->file);
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nkeynes@353 | 137 | int status = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
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nkeynes@353 | 138 | if( status == CDS_DISC_OK ) {
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nkeynes@353 | 139 | status = ioctl(fd, CDROM_MEDIA_CHANGED, CDSL_CURRENT);
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nkeynes@353 | 140 | if( status != 0 ) {
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nkeynes@422 | 141 | linux_read_disc_toc( (gdrom_image_t)disc);
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nkeynes@353 | 142 | }
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nkeynes@353 | 143 | return ((gdrom_image_t)disc)->disc_type | IDE_DISC_READY;
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nkeynes@353 | 144 | } else {
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nkeynes@353 | 145 | return IDE_DISC_NONE;
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nkeynes@353 | 146 | }
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nkeynes@353 | 147 | }
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nkeynes@237 | 148 | /**
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nkeynes@237 | 149 | * Read the full table of contents into the disc from the device.
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nkeynes@237 | 150 | */
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nkeynes@342 | 151 | static gdrom_error_t linux_read_disc_toc( gdrom_image_t disc )
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nkeynes@237 | 152 | {
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nkeynes@237 | 153 | int fd = fileno(disc->file);
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nkeynes@237 | 154 | unsigned char buf[MAXTOCSIZE];
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nkeynes@422 | 155 | size_t buflen = sizeof(buf);
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nkeynes@237 | 156 | char cmd[12] = { 0x43, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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nkeynes@237 | 157 |
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nkeynes@237 | 158 | cmd[7] = (sizeof(buf))>>8;
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nkeynes@237 | 159 | cmd[8] = (sizeof(buf))&0xFF;
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nkeynes@237 | 160 | memset( buf, 0, sizeof(buf) );
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nkeynes@342 | 161 | gdrom_error_t status = linux_send_command( fd, cmd, buf, &buflen, CGC_DATA_READ );
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nkeynes@237 | 162 | if( status != 0 ) {
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nkeynes@237 | 163 | return status;
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nkeynes@237 | 164 | }
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nkeynes@237 | 165 |
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nkeynes@237 | 166 | int max_track = 0;
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nkeynes@237 | 167 | int last_track = -1;
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nkeynes@237 | 168 | int leadout = -1;
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nkeynes@237 | 169 | int len = (buf[0] << 8) | buf[1];
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nkeynes@237 | 170 | int session_type = GDROM_MODE1;
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nkeynes@237 | 171 | int i;
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nkeynes@237 | 172 | for( i = 4; i<len; i+=11 ) {
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nkeynes@237 | 173 | int session = buf[i];
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nkeynes@237 | 174 | int adr = buf[i+1] >> 4;
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nkeynes@237 | 175 | int point = buf[i+3];
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nkeynes@237 | 176 | if( adr == 0x01 && point > 0 && point < 100 ) {
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nkeynes@237 | 177 | /* Track info */
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nkeynes@237 | 178 | int trackno = point-1;
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nkeynes@237 | 179 | if( point > max_track ) {
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nkeynes@237 | 180 | max_track = point;
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nkeynes@237 | 181 | }
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nkeynes@237 | 182 | disc->track[trackno].flags = (buf[i+1] & 0x0F) << 4;
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nkeynes@237 | 183 | disc->track[trackno].session = session - 1;
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nkeynes@237 | 184 | disc->track[trackno].lba = MSFTOLBA(buf[i+8],buf[i+9],buf[i+10]);
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nkeynes@237 | 185 | if( disc->track[trackno].flags & TRACK_DATA ) {
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nkeynes@237 | 186 | disc->track[trackno].mode = GDROM_MODE1;
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nkeynes@237 | 187 | } else {
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nkeynes@237 | 188 | disc->track[trackno].mode = GDROM_CDDA;
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nkeynes@237 | 189 | }
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nkeynes@237 | 190 | if( last_track != -1 ) {
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nkeynes@237 | 191 | disc->track[last_track].sector_count = disc->track[trackno].lba -
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nkeynes@237 | 192 | disc->track[last_track].lba;
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nkeynes@237 | 193 | }
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nkeynes@237 | 194 | last_track = trackno;
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nkeynes@237 | 195 | } else switch( (adr << 8) | point ) {
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nkeynes@237 | 196 | case 0x1A0: /* session info */
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nkeynes@237 | 197 | if( buf[i+9] == 0x20 ) {
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nkeynes@237 | 198 | session_type = GDROM_MODE2;
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nkeynes@237 | 199 | } else {
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nkeynes@237 | 200 | session_type = GDROM_MODE1;
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nkeynes@237 | 201 | }
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nkeynes@237 | 202 | case 0x1A2: /* leadout */
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nkeynes@237 | 203 | leadout = MSFTOLBA(buf[i+8], buf[i+9], buf[i+10]);
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nkeynes@237 | 204 | break;
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nkeynes@237 | 205 | }
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nkeynes@237 | 206 | }
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nkeynes@237 | 207 | disc->track_count = max_track;
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nkeynes@237 | 208 |
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nkeynes@237 | 209 | if( leadout != -1 && last_track != -1 ) {
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nkeynes@237 | 210 | disc->track[last_track].sector_count = leadout - disc->track[last_track].lba;
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nkeynes@237 | 211 | }
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nkeynes@237 | 212 | return 0;
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nkeynes@237 | 213 | }
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nkeynes@237 | 214 |
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nkeynes@480 | 215 | gdrom_error_t linux_play_audio( gdrom_disc_t disc, uint32_t lba, uint32_t endlba )
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nkeynes@464 | 216 | {
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nkeynes@464 | 217 | int fd = fileno( ((gdrom_image_t)disc)->file );
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nkeynes@464 | 218 | uint32_t real_sector = lba - CD_MSF_OFFSET;
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nkeynes@464 | 219 | uint32_t length = endlba - lba;
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nkeynes@464 | 220 | uint32_t buflen = 0;
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nkeynes@464 | 221 | char cmd[12] = { 0xA5, 0,0,0, 0,0,0,0, 0,0,0,0 };
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nkeynes@464 | 222 | cmd[2] = (real_sector >> 24) & 0xFF;
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nkeynes@464 | 223 | cmd[3] = (real_sector >> 16) & 0xFF;
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nkeynes@464 | 224 | cmd[4] = (real_sector >> 8) & 0xFF;
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nkeynes@464 | 225 | cmd[5] = real_sector & 0xFF;
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nkeynes@464 | 226 | cmd[6] = (length >> 24) & 0xFF;
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nkeynes@464 | 227 | cmd[7] = (length >> 16) & 0xFF;
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nkeynes@464 | 228 | cmd[8] = (length >> 8) & 0xFF;
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nkeynes@464 | 229 | cmd[9] = length & 0xFF;
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nkeynes@464 | 230 |
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nkeynes@464 | 231 | return linux_send_command( fd, cmd, NULL, &buflen, CGC_DATA_NONE );
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nkeynes@464 | 232 | }
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nkeynes@464 | 233 |
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nkeynes@480 | 234 | gdrom_error_t linux_stop_audio( gdrom_disc_t disc )
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nkeynes@464 | 235 | {
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nkeynes@464 | 236 | int fd = fileno( ((gdrom_image_t)disc)->file );
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nkeynes@464 | 237 | uint32_t buflen = 0;
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nkeynes@464 | 238 | char cmd[12] = {0x4E,0,0,0, 0,0,0,0, 0,0,0,0};
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nkeynes@464 | 239 | return linux_send_command( fd, cmd, NULL, &buflen, CGC_DATA_NONE );
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nkeynes@464 | 240 | }
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nkeynes@464 | 241 |
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nkeynes@342 | 242 | static gdrom_error_t linux_read_sector( gdrom_disc_t disc, uint32_t sector,
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nkeynes@422 | 243 | int mode, unsigned char *buf, uint32_t *length )
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nkeynes@237 | 244 | {
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nkeynes@342 | 245 | gdrom_image_t image = (gdrom_image_t)disc;
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nkeynes@342 | 246 | int fd = fileno(image->file);
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nkeynes@237 | 247 | uint32_t real_sector = sector - CD_MSF_OFFSET;
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nkeynes@342 | 248 | uint32_t sector_size = MAX_SECTOR_SIZE;
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nkeynes@237 | 249 | char cmd[12] = { 0xBE, 0x10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
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nkeynes@259 | 250 |
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nkeynes@342 | 251 | cmd[1] = (mode & 0x0E) << 1;
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nkeynes@342 | 252 | cmd[2] = (real_sector >> 24) & 0xFF;
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nkeynes@342 | 253 | cmd[3] = (real_sector >> 16) & 0xFF;
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nkeynes@342 | 254 | cmd[4] = (real_sector >> 8) & 0xFF;
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nkeynes@342 | 255 | cmd[5] = real_sector & 0xFF;
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nkeynes@342 | 256 | cmd[6] = 0;
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nkeynes@342 | 257 | cmd[7] = 0;
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nkeynes@342 | 258 | cmd[8] = 1;
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nkeynes@342 | 259 | cmd[9] = 0x10;
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nkeynes@237 | 260 |
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nkeynes@342 | 261 | gdrom_error_t status = linux_send_command( fd, cmd, buf, §or_size, CGC_DATA_READ );
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nkeynes@342 | 262 | if( status != 0 ) {
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nkeynes@342 | 263 | return status;
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nkeynes@237 | 264 | }
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nkeynes@342 | 265 | *length = 2048;
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nkeynes@259 | 266 | return 0;
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nkeynes@237 | 267 | }
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nkeynes@237 | 268 |
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nkeynes@237 | 269 | /**
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nkeynes@237 | 270 | * Send a packet command to the device and wait for a response.
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nkeynes@237 | 271 | * @return 0 on success, -1 on an operating system error, or a sense error
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nkeynes@237 | 272 | * code on a device error.
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nkeynes@237 | 273 | */
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nkeynes@422 | 274 | static gdrom_error_t linux_send_command( int fd, char *cmd, unsigned char *buffer, size_t *buflen,
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nkeynes@237 | 275 | int direction )
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nkeynes@237 | 276 | {
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nkeynes@237 | 277 | struct request_sense sense;
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nkeynes@237 | 278 | struct cdrom_generic_command cgc;
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nkeynes@237 | 279 |
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nkeynes@237 | 280 | memset( &cgc, 0, sizeof(cgc) );
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nkeynes@237 | 281 | memset( &sense, 0, sizeof(sense) );
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nkeynes@237 | 282 | memcpy( cgc.cmd, cmd, 12 );
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nkeynes@237 | 283 | cgc.buffer = buffer;
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nkeynes@342 | 284 | cgc.buflen = *buflen;
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nkeynes@237 | 285 | cgc.sense = &sense;
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nkeynes@237 | 286 | cgc.data_direction = direction;
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nkeynes@237 | 287 |
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nkeynes@237 | 288 | if( ioctl(fd, CDROM_SEND_PACKET, &cgc) == -1 ) {
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nkeynes@237 | 289 | if( sense.sense_key == 0 ) {
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nkeynes@237 | 290 | return -1;
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nkeynes@237 | 291 | } else {
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nkeynes@342 | 292 | /* TODO: Map newer codes back to the ones used by the gd-rom. */
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nkeynes@237 | 293 | return sense.sense_key | (sense.asc<<8);
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nkeynes@237 | 294 | }
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nkeynes@237 | 295 | } else {
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nkeynes@342 | 296 | *buflen = cgc.buflen;
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nkeynes@237 | 297 | return 0;
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nkeynes@237 | 298 | }
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nkeynes@237 | 299 | }
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