nkeynes@237: /** nkeynes@342: * $Id: linux.c,v 1.3 2007-01-31 10:58:42 nkeynes Exp $ nkeynes@237: * nkeynes@342: * Linux cd-rom device driver. nkeynes@237: * nkeynes@237: * Copyright (c) 2005 Nathan Keynes. nkeynes@237: * nkeynes@237: * This program is free software; you can redistribute it and/or modify nkeynes@237: * it under the terms of the GNU General Public License as published by nkeynes@237: * the Free Software Foundation; either version 2 of the License, or nkeynes@237: * (at your option) any later version. nkeynes@237: * nkeynes@237: * This program is distributed in the hope that it will be useful, nkeynes@237: * but WITHOUT ANY WARRANTY; without even the implied warranty of nkeynes@237: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the nkeynes@237: * GNU General Public License for more details. nkeynes@237: */ nkeynes@237: #include nkeynes@237: #include nkeynes@237: #include nkeynes@237: #include nkeynes@237: #include nkeynes@237: #include nkeynes@237: #include nkeynes@237: nkeynes@237: #include "gdrom/gdrom.h" nkeynes@237: #include "gdrom/packet.h" nkeynes@237: #include "dream.h" nkeynes@237: nkeynes@237: #define MAXTOCENTRIES 600 /* This is a fairly generous overestimate really */ nkeynes@237: #define MAXTOCSIZE 4 + (MAXTOCENTRIES*11) nkeynes@342: #define MAX_SECTORS_PER_CALL 1 nkeynes@237: nkeynes@237: #define MSFTOLBA( m,s,f ) (f + (s*CD_FRAMES) + (m*CD_FRAMES*CD_SECS)) nkeynes@237: nkeynes@237: static uint32_t inline lbatomsf( uint32_t lba ) { nkeynes@237: union cdrom_addr addr; nkeynes@237: lba = lba + CD_MSF_OFFSET; nkeynes@237: addr.msf.frame = lba % CD_FRAMES; nkeynes@237: int seconds = lba / CD_FRAMES; nkeynes@237: addr.msf.second = seconds % CD_SECS; nkeynes@237: addr.msf.minute = seconds / CD_SECS; nkeynes@237: return addr.lba; nkeynes@237: } nkeynes@237: nkeynes@237: #define LBATOMSF( lba ) lbatomsf(lba) nkeynes@237: nkeynes@237: nkeynes@237: static gboolean linux_image_is_valid( FILE *f ); nkeynes@237: static gdrom_disc_t linux_open_device( const gchar *filename, FILE *f ); nkeynes@342: static gdrom_error_t linux_read_disc_toc( gdrom_image_t disc ); nkeynes@342: static gdrom_error_t linux_read_sector( gdrom_disc_t disc, uint32_t sector, nkeynes@342: int mode, char *buf, uint32_t *length ); nkeynes@342: static gdrom_error_t linux_send_command( int fd, char *cmd, char *buffer, size_t *buflen, nkeynes@237: int direction ); nkeynes@237: nkeynes@237: nkeynes@237: struct gdrom_image_class linux_device_class = { "Linux", NULL, nkeynes@237: linux_image_is_valid, linux_open_device }; nkeynes@237: nkeynes@237: static gboolean linux_image_is_valid( FILE *f ) nkeynes@237: { nkeynes@237: struct stat st; nkeynes@237: struct cdrom_tochdr tochdr; nkeynes@237: nkeynes@237: if( fstat(fileno(f), &st) == -1 ) { nkeynes@237: return FALSE; /* can't stat device? */ nkeynes@237: } nkeynes@237: if( !S_ISBLK(st.st_mode) ) { nkeynes@237: return FALSE; /* Not a block device */ nkeynes@237: } nkeynes@237: nkeynes@237: if( ioctl(fileno(f), CDROMREADTOCHDR, &tochdr) == -1 ) { nkeynes@237: /* Quick check that this is really a CD */ nkeynes@237: return FALSE; nkeynes@237: } nkeynes@237: nkeynes@237: return TRUE; nkeynes@237: } nkeynes@237: nkeynes@237: static gdrom_disc_t linux_open_device( const gchar *filename, FILE *f ) nkeynes@237: { nkeynes@237: gdrom_disc_t disc; nkeynes@237: int fd = fileno(f); nkeynes@237: nkeynes@237: disc = gdrom_image_new(f); nkeynes@237: if( disc == NULL ) { nkeynes@237: ERROR("Unable to allocate memory!"); nkeynes@237: return NULL; nkeynes@237: } nkeynes@237: nkeynes@342: gdrom_error_t status = linux_read_disc_toc( (gdrom_image_t)disc ); nkeynes@237: if( status != 0 ) { nkeynes@342: disc->close(disc); nkeynes@237: if( status == 0xFFFF ) { nkeynes@237: ERROR("Unable to load disc table of contents (%s)", strerror(errno)); nkeynes@237: } else { nkeynes@237: ERROR("Unable to load disc table of contents (sense %d,%d)", nkeynes@237: status &0xFF, status >> 8 ); nkeynes@237: } nkeynes@237: return NULL; nkeynes@237: } nkeynes@342: disc->read_sector = linux_read_sector; nkeynes@342: ((gdrom_image_t)disc)->disc_type = IDE_DISC_CDROM; nkeynes@237: return disc; nkeynes@237: } nkeynes@237: nkeynes@237: /** nkeynes@237: * Read the full table of contents into the disc from the device. nkeynes@237: */ nkeynes@342: static gdrom_error_t linux_read_disc_toc( gdrom_image_t disc ) nkeynes@237: { nkeynes@237: int fd = fileno(disc->file); nkeynes@237: unsigned char buf[MAXTOCSIZE]; nkeynes@342: int buflen = sizeof(buf); nkeynes@237: char cmd[12] = { 0x43, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; nkeynes@237: nkeynes@237: cmd[7] = (sizeof(buf))>>8; nkeynes@237: cmd[8] = (sizeof(buf))&0xFF; nkeynes@237: memset( buf, 0, sizeof(buf) ); nkeynes@342: gdrom_error_t status = linux_send_command( fd, cmd, buf, &buflen, CGC_DATA_READ ); nkeynes@237: if( status != 0 ) { nkeynes@237: return status; nkeynes@237: } nkeynes@237: nkeynes@237: int max_track = 0; nkeynes@237: int last_track = -1; nkeynes@237: int leadout = -1; nkeynes@237: int len = (buf[0] << 8) | buf[1]; nkeynes@237: int session_type = GDROM_MODE1; nkeynes@237: int i; nkeynes@237: for( i = 4; i> 4; nkeynes@237: int point = buf[i+3]; nkeynes@237: if( adr == 0x01 && point > 0 && point < 100 ) { nkeynes@237: /* Track info */ nkeynes@237: int trackno = point-1; nkeynes@237: if( point > max_track ) { nkeynes@237: max_track = point; nkeynes@237: } nkeynes@237: disc->track[trackno].flags = (buf[i+1] & 0x0F) << 4; nkeynes@237: disc->track[trackno].session = session - 1; nkeynes@237: disc->track[trackno].lba = MSFTOLBA(buf[i+8],buf[i+9],buf[i+10]); nkeynes@237: if( disc->track[trackno].flags & TRACK_DATA ) { nkeynes@237: disc->track[trackno].mode = GDROM_MODE1; nkeynes@237: } else { nkeynes@237: disc->track[trackno].mode = GDROM_CDDA; nkeynes@237: } nkeynes@237: if( last_track != -1 ) { nkeynes@237: disc->track[last_track].sector_count = disc->track[trackno].lba - nkeynes@237: disc->track[last_track].lba; nkeynes@237: } nkeynes@237: last_track = trackno; nkeynes@237: } else switch( (adr << 8) | point ) { nkeynes@237: case 0x1A0: /* session info */ nkeynes@237: if( buf[i+9] == 0x20 ) { nkeynes@237: session_type = GDROM_MODE2; nkeynes@237: } else { nkeynes@237: session_type = GDROM_MODE1; nkeynes@237: } nkeynes@237: case 0x1A2: /* leadout */ nkeynes@237: leadout = MSFTOLBA(buf[i+8], buf[i+9], buf[i+10]); nkeynes@237: break; nkeynes@237: } nkeynes@237: } nkeynes@237: disc->track_count = max_track; nkeynes@237: nkeynes@237: if( leadout != -1 && last_track != -1 ) { nkeynes@237: disc->track[last_track].sector_count = leadout - disc->track[last_track].lba; nkeynes@237: } nkeynes@237: return 0; nkeynes@237: } nkeynes@237: nkeynes@342: static gdrom_error_t linux_read_sector( gdrom_disc_t disc, uint32_t sector, nkeynes@342: int mode, char *buf, uint32_t *length ) nkeynes@237: { nkeynes@342: gdrom_image_t image = (gdrom_image_t)disc; nkeynes@342: int fd = fileno(image->file); nkeynes@237: uint32_t real_sector = sector - CD_MSF_OFFSET; nkeynes@342: uint32_t sector_size = MAX_SECTOR_SIZE; nkeynes@259: int i; nkeynes@237: char cmd[12] = { 0xBE, 0x10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; nkeynes@259: nkeynes@342: cmd[1] = (mode & 0x0E) << 1; nkeynes@342: cmd[2] = (real_sector >> 24) & 0xFF; nkeynes@342: cmd[3] = (real_sector >> 16) & 0xFF; nkeynes@342: cmd[4] = (real_sector >> 8) & 0xFF; nkeynes@342: cmd[5] = real_sector & 0xFF; nkeynes@342: cmd[6] = 0; nkeynes@342: cmd[7] = 0; nkeynes@342: cmd[8] = 1; nkeynes@342: cmd[9] = 0x10; nkeynes@237: nkeynes@342: gdrom_error_t status = linux_send_command( fd, cmd, buf, §or_size, CGC_DATA_READ ); nkeynes@342: if( status != 0 ) { nkeynes@342: return status; nkeynes@237: } nkeynes@342: *length = 2048; nkeynes@259: return 0; nkeynes@237: } nkeynes@237: nkeynes@237: /** nkeynes@237: * Send a packet command to the device and wait for a response. nkeynes@237: * @return 0 on success, -1 on an operating system error, or a sense error nkeynes@237: * code on a device error. nkeynes@237: */ nkeynes@342: static gdrom_error_t linux_send_command( int fd, char *cmd, char *buffer, size_t *buflen, nkeynes@237: int direction ) nkeynes@237: { nkeynes@237: struct request_sense sense; nkeynes@237: struct cdrom_generic_command cgc; nkeynes@237: nkeynes@237: memset( &cgc, 0, sizeof(cgc) ); nkeynes@237: memset( &sense, 0, sizeof(sense) ); nkeynes@237: memcpy( cgc.cmd, cmd, 12 ); nkeynes@237: cgc.buffer = buffer; nkeynes@342: cgc.buflen = *buflen; nkeynes@237: cgc.sense = &sense; nkeynes@237: cgc.data_direction = direction; nkeynes@237: nkeynes@237: if( ioctl(fd, CDROM_SEND_PACKET, &cgc) == -1 ) { nkeynes@237: if( sense.sense_key == 0 ) { nkeynes@237: return -1; nkeynes@237: } else { nkeynes@342: /* TODO: Map newer codes back to the ones used by the gd-rom. */ nkeynes@237: return sense.sense_key | (sense.asc<<8); nkeynes@237: } nkeynes@237: } else { nkeynes@342: *buflen = cgc.buflen; nkeynes@237: return 0; nkeynes@237: } nkeynes@237: }