cdrom.rar_Linux驱动_cdrom_linux cdrom_linux驱动程序

/* * sbpcd.c CD-ROM device driver for the whole family of traditional, * non-ATAPI IDE-style Matsushita/Panasonic CR-5xx drives. * Works with SoundBlaster compatible cards and with "no-sound" * interface cards like Lasermate, Panasonic CI-101P, Teac, ... * Also for the Longshine LCS-7260 drive. * Also for the IBM "External ISA CD-Rom" drive. * Also for the CreativeLabs CD200 drive. * Also for the TEAC CD-55A drive. * Also for the ECS-AT "Vertos 100" drive. * Not for Sanyo drives (but for the H94A, sjcd is there...). * Not for any other Funai drives than the CD200 types (sometimes * labelled E2550UA or MK4015 or 2800F). */ #define VERSION "v4.63 Andrew J. Kroll <ag784@freenet.buffalo.edu> Wed Jul 26 04:24:10 EDT 2000" /* Copyright (C) 1993, 1994, 1995 Eberhard Moenkeberg <emoenke@gwdg.de> * * 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. * * You should have received a copy of the GNU General Public License * (for example /usr/src/linux/COPYING); if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * If you change this software, you should mail a .diff file with some * description lines to emoenke@gwdg.de. I want to know about it. * * If you are the editor of a Linux CD, you should enable sbpcd.c within * your boot floppy kernel and send me one of your CDs for free. * * If you would like to port the driver to an other operating system (f.e. * FreeBSD or NetBSD) or use it as an information source, you shall not be * restricted by the GPL under the following conditions: * a) the source code of your work is freely available * b) my part of the work gets mentioned at all places where your * authorship gets mentioned * c) I receive a copy of your code together with a full installation * package of your operating system for free. * * * VERSION HISTORY * * 0.1 initial release, April/May 93, after mcd.c (Martin Harriss) * * 0.2 thek "repeat:"-loop in do_sbpcd_request did not check for * end-of-request_queue (resulting in kernel panic). * Flow control seems stable, but throughput is not better. * * 0.3 interrupt locking totally eliminated (maybe "inb" and "outb" * are still locking) - 0.2 made keyboard-type-ahead losses. * check_sbpcd_media_change added (to use by isofs/inode.c) * - but it detects almost nothing. * * 0.4 use MAJOR 25 definitely. * Almost total re-design to support double-speed drives and * "naked" (no sound) interface cards ("LaserMate" interface type). * Flow control should be exact now. * Don't occupy the SbPro IRQ line (not needed either); will * live together with Hannu Savolainen's sndkit now. * Speeded up data transfer to 150 kB/sec, with help from Kai * Makisara, the "provider" of the "mt" tape utility. * Give "SpinUp" command if necessary. * First steps to support up to 4 drives (but currently only one). * Implemented audio capabilities - workman should work, xcdplayer * gives some problems. * This version is still consuming too much CPU time, and * sleeping still has to be worked on. * During "long" implied seeks, it seems possible that a * ReadStatus command gets ignored. That gives the message * "ResponseStatus timed out" (happens about 6 times here during * a "ls -alR" of the YGGDRASIL LGX-Beta CD). Such a case is * handled without data error, but it should get done better. * * 0.5 Free CPU during waits (again with help from Kai Makisara). * Made it work together with the LILO/kernel setup standard. * Included auto-probing code, as suggested by YGGDRASIL. * Formal redesign to add DDI debugging. * There are still flaws in IOCTL (workman with double speed drive). * * 1.0 Added support for all drive IDs (0...3, no longer only 0) * and up to 4 drives on one controller. * Added "#define MANY_SESSION" for "old" multi session CDs. * * 1.1 Do SpinUp for new drives, too. * Revised for clean compile under "old" kernels (0.99pl9). * * 1.2 Found the "workman with double-speed drive" bug: use the driver's * audio_state, not what the drive is reporting with ReadSubQ. * * 1.3 Minor cleanups. * Refinements regarding Workman. * * 1.4 Read XA disks (PhotoCDs) with "old" drives, too (but only the first * session - no chance to fully access a "multi-session" CD). * This currently still is too slow (50 kB/sec) - but possibly * the old drives won't do it faster. * Implemented "door (un)lock" for new drives (still does not work * as wanted - no lock possible after an unlock). * Added some debugging printout for the UPC/EAN code - but my drives * return only zeroes. Is there no UPC/EAN code written? * * 1.5 Laborate with UPC/EAN code (not better yet). * Adapt to kernel 1.1.8 change (have to explicitly include * <linux/string.h> now). * * 1.6 Trying to read audio frames as data. Impossible with the current * drive firmware levels, as it seems. Awaiting any hint. ;-) * Changed "door unlock": repeat it until success. * Changed CDROMSTOP routine (stop somewhat "softer" so that Workman * won't get confused). * Added a third interface type: Sequoia S-1000, as used with the SPEA * Media FX sound card. This interface (usable for Sony and Mitsumi * drives, too) needs a special configuration setup and behaves like a * LaserMate type after that. Still experimental - I do not have such * an interface. * Use the "variable BLOCK_SIZE" feature (2048). But it does only work * if you give the mount option "block=2048". * The media_check routine is currently disabled; now that it gets * called as it should I fear it must get synchronized for not to * disturb the normal driver's activity. * * 2.0 Version number bumped - two reasons: * - reading audio tracks as data works now with CR-562 and CR-563. We * currently do it by an IOCTL (yet has to get standardized), one frame * at a time; that is pretty slow. But it works. * - we are maintaining now up to 4 interfaces (each up to 4 drives): * did it the easy way - a different MAJOR (25, 26, ...) and a different * copy of the driver (sbpcd.c, sbpcd2.c, sbpcd3.c, sbpcd4.c - only * distinguished by the value of SBPCD_ISSUE and the driver's name), * and a common sbpcd.h file. * Bettered the "ReadCapacity error" problem with old CR-52x drives (the * drives sometimes need a manual "eject/insert" before work): just * reset the drive and do again. Needs lots of resets here and sometimes * that does not cure, so this can't be the solution. * * 2.1 Found bug with multisession CDs (accessing frame 16). * "read audio" works now with address type CDROM_MSF, too. * Bigger audio frame buffer: allows reading max. 4 frames at time; this * gives a significant speedup, but reading more than one frame at once * gives missing chunks at each single frame boundary. * * 2.2 Kernel interface cleanups: timers, init, setup, media check. * * 2.3 Let "door lock" and "eject" live together. * Implemented "close tray" (done automatically during open). * * 2.4 Use different names for device registering. * * 2.5 Added "#if EJECT" code (default: enabled) to automatically eject * the tray during last call to "sbpcd_release". * Adde