1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
822 lines
42 KiB
Text
822 lines
42 KiB
Text
$Id: README.aztcd,v 2.60 1997/11/29 09:51:25 root Exp root $
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Readme-File Documentation/cdrom/aztcd
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for
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AZTECH CD-ROM CDA268-01A, ORCHID CD-3110,
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OKANO/WEARNES CDD110, CONRAD TXC, CyCDROM CR520, CR540
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CD-ROM Drives
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Version 2.6 and newer
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(for other drives see 6.-8.)
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NOTE: THIS DRIVER WILL WORK WITH THE CD-ROM DRIVES LISTED, WHICH HAVE
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A PROPRIETARY INTERFACE (implemented on a sound card or on an
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ISA-AT-bus card).
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IT WILL DEFINITELY NOT WORK WITH CD-ROM DRIVES WITH *IDE*-INTERFACE,
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such as the Aztech CDA269-031SE !!! (The only known exceptions are
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'faked' IDE drives like the CyCDROM CR520ie which work with aztcd
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under certain conditions, see 7.). IF YOU'RE USING A CD-ROM DRIVE
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WITH IDE-INTERFACE, SOMETIMES ALSO CALLED ATAPI-COMPATIBLE, PLEASE
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USE THE ide-cd.c DRIVER, WRITTEN BY MARK LORD AND SCOTT SNYDER !
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THE STANDARD-KERNEL 1.2.x NOW ALSO SUPPORTS IDE-CDROM-DRIVES, SEE THE
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HARDDISK (!) SECTION OF make config, WHEN COMPILING A NEW KERNEL!!!
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----------------------------------------------------------------------------
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Contents of this file:
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1. NOTE
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2. INSTALLATION
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3. CONFIGURING YOUR KERNEL
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4. RECOMPILING YOUR KERNEL
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4.1 AZTCD AS A RUN-TIME LOADABLE MODULE
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4.2 CDROM CONNECTED TO A SOUNDCARD
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5. KNOWN PROBLEMS, FUTURE DEVELOPMENTS
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5.1 MULTISESSION SUPPORT
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5.2 STATUS RECOGNITION
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5.3 DOSEMU's CDROM SUPPORT
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6. BUG REPORTS
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7. OTHER DRIVES
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8. IF YOU DON'T SUCCEED ... DEBUGGING
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9. TECHNICAL HISTORY OF THE DRIVER
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10. ACKNOWLEDGMENTS
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11. PROGRAMMING ADD ONS: CDPLAY.C
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APPENDIX: Source code of cdplay.c
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----------------------------------------------------------------------------
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1. NOTE
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This software has been successfully in alpha and beta test and is part of
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the standard kernel since kernel 1.1.8x since December 1994. It works with
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AZTECH CDA268-01A, ORCHID CDS-3110, ORCHID/WEARNES CDD110 and CONRAD TXC
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(Nr.99 31 23 -series 04) and has proven to be stable with kernel
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versions 1.0.9 and newer. But with any software there still may be bugs in it.
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So if you encounter problems, you are invited to help us improve this software.
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Please send me a detailed bug report (see chapter BUG REPORTS). You are also
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invited in helping us to increase the number of drives, which are supported.
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Please read the README-files carefully and always keep a backup copy of your
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old kernel, in order to reboot if something goes wrong!
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2. INSTALLATION
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The driver consists of a header file 'aztcd.h', which normally should reside
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in /usr/src/linux/drivers/cdrom and the source code 'aztcd.c', which normally
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resides in the same place. It uses /dev/aztcd (/dev/aztcd0 in some distri-
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butions), which must be a valid block device with major number 29 and reside
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in directory /dev. To mount a CD-ROM, your kernel needs to have the ISO9660-
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filesystem support included.
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PLEASE NOTE: aztcd.c has been developed in parallel to the linux kernel,
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which had and is having many major and minor changes which are not backward
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compatible. Quite definitely aztcd.c version 1.80 and newer will NOT work
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in kernels older than 1.3.33. So please always use the most recent version
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of aztcd.c with the appropriate linux-kernel.
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3. CONFIGURING YOUR KERNEL
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If your kernel is already configured for using the AZTECH driver you will
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see the following message while Linux boots:
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Aztech CD-ROM Init: DriverVersion=<version number> BaseAddress=<baseaddress>
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Aztech CD-ROM Init: FirmwareVersion=<firmware version id of your I/O-card>>>
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Aztech CD-ROM Init: <drive type> detected
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Aztech CD-ROM Init: End
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If the message looks different and you are sure to have a supported drive,
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it may have a different base address. The Aztech driver does look for the
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CD-ROM drive at the base address specified in aztcd.h at compile time. This
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address can be overwritten by boot parameter aztcd=....You should reboot and
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start Linux with boot parameter aztcd=<base address>, e.g. aztcd=0x320. If
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you do not know the base address, start your PC with DOS and look at the boot
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message of your CD-ROM's DOS driver. If that still does not help, use boot
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parameter aztcd=<base address>,0x79 , this tells aztcd to try a little harder.
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aztcd may be configured to use autoprobing the base address by recompiling
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it (see chapter 4.).
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If the message looks correct, as user 'root' you should be able to mount the
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drive by
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mount -t iso9660 -r /dev/aztcd0 /mnt
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and use it as any other filesystem. (If this does not work, check if
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/dev/aztcd0 and /mnt do exist and create them, if necessary by doing
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mknod /dev/aztcd0 b 29 0
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mkdir /mnt
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If you still get a different message while Linux boots or when you get the
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message, that the ISO9660-filesystem is not supported by your kernel, when
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you try to mount the CD-ROM drive, you have to recompile your kernel.
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If you do *not* have an Aztech/Orchid/Okano/Wearnes/TXC drive and want to
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bypass drive detection during Linux boot up, start with boot parameter aztcd=0.
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Most distributions nowadays do contain a boot disk image containing aztcd.
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Please note, that this driver will not work with IDE/ATAPI drives! With these
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you must use ide-cd.c instead.
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4. RECOMPILING YOUR KERNEL
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If your kernel is not yet configured for the AZTECH driver and the ISO9660-
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filesystem, you have to recompile your kernel:
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- Edit aztcd.h to set the I/O-address to your I/O-Base address (AZT_BASE_ADDR),
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the driver does not use interrupts or DMA, so if you are using an AZTECH
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CD268, an ORCHID CD-3110 or ORCHID/WEARNES CDD110 that's the only item you
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have to set up. If you have a soundcard, read chapter 4.2.
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Users of other drives should read chapter OTHER DRIVES of this file.
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You also can configure that address by kernel boot parameter aztcd=...
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- aztcd may be configured to use autoprobing the base address by setting
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AZT_BASE_ADDR to '-1'. In that case aztcd probes the addresses listed
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under AZT_BASE_AUTO. But please remember, that autoprobing always may
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incorrectly influence other hardware components too!
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- There are some other points, which may be configured, e.g. auto-eject the
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CD when unmounting a drive, tray locking etc., see aztcd.h for details.
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- If you're using a linux kernel version prior to 2.1.0, in aztcd.h
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uncomment the line '#define AZT_KERNEL_PRIOR_2_1'
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- Build a new kernel, configure it for 'Aztech/Orchid/Okano/Wearnes support'
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(if you want aztcd to be part of the kernel). Do not configure it for
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'Aztech... support', if you want to use aztcd as a run time loadable module.
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But in any case you must have the ISO9660-filesystem included in your
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kernel.
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- Activate the new kernel, normally this is done by running LILO (don't for-
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get to configure it before and to keep a copy of your old kernel in case
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something goes wrong!).
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- Reboot
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- If you've included aztcd in your kernel, you now should see during boot
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some messages like
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Aztech CD-ROM Init: DriverVersion=<version number> BaseAddress=<baseaddress>
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Aztech CD-ROM Init: FirmwareVersion=<firmware version id of your I/O-card>
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Aztech CD-ROM Init: <drive type> detected
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Aztech CD-ROM Init: End
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- If you have not included aztcd in your kernel, but want to load aztcd as a
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run time loadable module see 4.1.
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- If the message looks correct, as user 'root' you should be able to mount
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the drive by
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mount -t iso9660 -r /dev/aztcd0 /mnt
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and use it as any other filesystem. (If this does not work, check if
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/dev/aztcd0 and /mnt do exist and create them, if necessary by doing
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mknod /dev/aztcd0 b 29 0
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mkdir /mnt
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- If this still does not help, see chapters OTHER DRIVES and DEBUGGING.
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4.1 AZTCD AS A RUN-TIME LOADABLE MODULE
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If you do not need aztcd permanently, you can also load and remove the driver
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during runtime via insmod and rmmod. To build aztcd as a loadable module you
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must configure your kernel for AZTECH module support (answer 'm' when con-
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figuring the kernel). Anyhow, you may run into problems, if the version of
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your boot kernel is not the same than the source kernel version, from which
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you create the modules. So rebuild your kernel, if necessary.
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Now edit the base address of your AZTECH interface card in
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/usr/src/linux/drivers/cdrom/aztcd.h to the appropriate value.
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aztcd may be configured to use autoprobing the base address by setting
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AZT_BASE_ADDR to '-1'. In that case aztcd probes the addresses listed
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under AZT_BASE_AUTO. But please remember, that autoprobing always may
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incorrectly influence other hardware components too!
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There are also some special features which may be configured, e.g.
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auto-eject a CD when unmounting the drive etc; see aztcd.h for details.
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Then change to /usr/src/linux and do a
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make modules
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make modules_install
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After that you can run-time load the driver via
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insmod /lib/modules/X.X.X/misc/aztcd.o
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and remove it via rmmod aztcd.
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If you did not set the correct base address in aztcd.h, you can also supply the
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base address when loading the driver via
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insmod /lib/modules/X.X.X/misc/aztcd.o aztcd=<base address>
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Again specifying aztcd=-1 will cause autoprobing.
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If you do not have the iso9660-filesystem in your boot kernel, you also have
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to load it before you can mount the CDROM:
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insmod /lib/modules/X.X.X/fs/isofs.o
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The mount procedure works as described in 4. above.
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(In all commands 'X.X.X' is the current linux kernel version number)
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4.2 CDROM CONNECTED TO A SOUNDCARD
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Most soundcards do have a bus interface to the CDROM-drive. In many cases
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this soundcard needs to be configured, before the CDROM can be used. This
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configuration procedure consists of writing some kind of initialization
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data to the soundcard registers. The AZTECH-CDROM driver in the moment does
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only support one type of soundcard (SoundWave32). Users of other soundcards
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should try to boot DOS first and let their DOS drivers initialize the
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soundcard and CDROM, then warm boot (or use loadlin) their PC to start
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Linux.
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Support for the CDROM-interface of SoundWave32-soundcards is directly
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implemented in the AZTECH driver. Please edit linux/drivers/cdrom/aztdc.h,
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uncomment line '#define AZT_SW32' and set the appropriate value for
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AZT_BASE_ADDR and AZT_SW32_BASE_ADDR. This support was tested with an Orchid
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CDS-3110 connected to a SoundWave32.
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If you want your soundcard to be supported, find out, how it needs to be
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configured and mail me (see 6.) the appropriate information.
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5. KNOWN PROBLEMS, FUTURE DEVELOPMENTS
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5.1 MULTISESSION SUPPORT
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Multisession support for CD's still is a myth. I implemented and tested a basic
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support for multisession and XA CDs, but I still have not enough CDs and appli-
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cations to test it rigorously. So if you'd like to help me, please contact me
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(Email address see below). As of version 1.4 and newer you can enable the
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multisession support in aztcd.h by setting AZT_MULTISESSION to 1. Doing so
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will cause the ISO9660-filesystem to deal with multisession CDs, ie. redirect
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requests to the Table of Contents (TOC) information from the last session,
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which contains the info of all previous sessions etc.. If you do set
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AZT_MULTISESSION to 0, you can use multisession CDs anyway. In that case the
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drive's firmware will do automatic redirection. For the ISO9660-filesystem any
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multisession CD will then look like a 'normal' single session CD. But never-
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theless the data of all sessions are viewable and accessible. So with practical-
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ly all real world applications you won't notice the difference. But as future
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applications may make use of advanced multisession features, I've started to
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implement the interface for the ISO9660 multisession interface via ioctl
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CDROMMULTISESSION.
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5.2 STATUS RECOGNITION
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The drive status recognition does not work correctly in all cases. Changing
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a disk or having the door open, when a drive is already mounted, is detected
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by the Aztech driver itself, but nevertheless causes multiple read attempts
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by the different layers of the ISO9660-filesystem driver, which finally timeout,
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so you have to wait quite a little... But isn't it bad style to change a disk
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in a mounted drive, anyhow ?!
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The driver uses busy wait in most cases for the drive handshake (macros
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STEN_LOW and DTEN_LOW). I tested with a 486/DX2 at 66MHz and a Pentium at
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60MHz and 90MHz. Whenever you use a much faster machine you are likely to get
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timeout messages. In that case edit aztcd.h and increase the timeout value
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AZT_TIMEOUT.
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For some 'slow' drive commands I implemented waiting with a timer waitqueue
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(macro STEN_LOW_WAIT). If you get this timeout message, you may also edit
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aztcd.h and increase the timeout value AZT_STATUS_DELAY. The waitqueue has
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shown to be a little critical. If you get kernel panic messages, edit aztcd.c
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and substitute STEN_LOW_WAIT by STEN_LOW. Busy waiting with STEN_LOW is more
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stable, but also causes CPU overhead.
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5.3 DOSEMU's CD-ROM SUPPORT
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With release 1.20 aztcd was modified to allow access to CD-ROMS when running
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under dosemu-0.60.0 aztcd-versions before 1.20 are most likely to crash
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Linux, when a CD-ROM is accessed under dosemu. This problem has partly been
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fixed, but still when accessing a directory for the first time the system
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might hang for some 30sec. So be patient, when using dosemu's CD-ROM support
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in combination with aztcd :-) !
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This problem has now (July 1995) been fixed by a modification to dosemu's
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CD-ROM driver. The new version came with dosemu-0.60.2, see dosemu's
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README.CDROM.
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6. BUG REPORTS
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Please send detailed bug reports and bug fixes via EMail to
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Werner.Zimmermann@fht-esslingen.de
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Please include a description of your CD-ROM drive type and interface card,
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the exact firmware message during Linux bootup, the version number of the
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AZTECH-CDROM-driver and the Linux kernel version. Also a description of your
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system's other hardware could be of interest, especially microprocessor type,
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clock frequency, other interface cards such as soundcards, ethernet adapter,
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game cards etc..
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I will try to collect the reports and make the necessary modifications from
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time to time. I may also come back to you directly with some bug fixes and
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ask you to do further testing and debugging.
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Editors of CD-ROMs are invited to send a 'cooperation' copy of their
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CD-ROMs to the volunteers, who provided the CD-ROM support for Linux. My
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snail mail address for such 'stuff' is
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Prof. Dr. W. Zimmermann
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Fachhochschule fuer Technik Esslingen
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Fachbereich IT
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Flandernstrasse 101
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D-73732 Esslingen
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Germany
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7. OTHER DRIVES
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The following drives ORCHID CDS3110, OKANO CDD110, WEARNES CDD110 and Conrad
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TXC Nr. 993123-series 04 nearly look the same as AZTECH CDA268-01A, especially
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they seem to use the same command codes. So it was quite simple to make the
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AZTECH driver work with these drives.
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Unfortunately I do not have any of these drives available, so I couldn't test
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it myself. In some installations, it seems necessary to initialize the drive
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with the DOS driver before (especially if combined with a sound card) and then
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do a warm boot (CTRL-ALT-RESET) or start Linux from DOS, e.g. with 'loadlin'.
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If you do not succeed, read chapter DEBUGGING. Thanks in advance!
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Sorry for the inconvenience, but it is difficult to develop for hardware,
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which you don't have available for testing. So if you like, please help us.
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If you do have a CyCDROM CR520ie thanks to Hilmar Berger's help your chances
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are good, that it will work with aztcd. The CR520ie is sold as an IDE-drive
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and really is connected to the IDE interface (primary at 0x1F0 or secondary
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at 0x170, configured as slave, not as master). Nevertheless it is not ATAPI
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compatible but still uses Aztech's command codes.
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8. DEBUGGING : IF YOU DON'T SUCCEED, TRY THE FOLLOWING
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-reread the complete README file
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-make sure, that your drive is hardware configured for
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transfer mode: polled
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IRQ: not used
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DMA: not used
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Base Address: something like 300, 320 ...
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You can check this, when you start the DOS driver, which came with your
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drive. By appropriately configuring the drive and the DOS driver you can
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check, whether your drive does operate in this mode correctly under DOS. If
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it does not operate under DOS, it won't under Linux.
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If your drive's base address is something like 0x170 or 0x1F0 (and it is
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not a CyCDROM CR520ie or CR 940ie) you most likely are having an IDE/ATAPI-
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compatible drive, which is not supported by aztcd.c, use ide-cd.c instead.
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Make sure the Base Address is configured correctly in aztcd.h, also make
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sure, that /dev/aztcd0 exists with the correct major number (compare it with
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the entry in file /usr/include/linux/major.h for the Aztech drive).
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-insert a CD-ROM and close the tray
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-cold boot your PC (i.e. via the power on switch or the reset button)
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-if you start Linux via DOS, e.g. using loadlin, make sure, that the DOS
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driver for the CD-ROM drive is not loaded (comment out the calling lines
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in DOS' config.sys!)
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-look for the aztcd: init message during Linux init and note them exactly
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-log in as root and do a mount -t iso9660 /dev/aztcd0 /mnt
|
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-if you don't succeed in the first time, try several times. Try also to open
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and close the tray, then mount again. Please note carefully all commands
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you typed in and the aztcd-messages, which you get.
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-if you get an 'Aztech CD-ROM init: aborted' message, read the remarks about
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the version string below.
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If this does not help, do the same with the following differences
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-start DOS before; make now sure, that the DOS driver for the CD-ROM is
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loaded under DOS (i.e. uncomment it again in config.sys)
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-warm boot your PC (i.e. via CTRL-ALT-DEL)
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if you have it, you can also start via loadlin (try both).
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...
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Again note all commands and the aztcd-messages.
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If you see STEN_LOW or STEN_LOW_WAIT error messages, increase the timeout
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values.
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If this still does not help,
|
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-look in aztcd.c for the lines #if 0
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#define AZT_TEST1
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...
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#endif
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and substitute '#if 0' by '#if 1'.
|
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-recompile your kernel and repeat the above two procedures. You will now get
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a bundle of debugging messages from the driver. Again note your commands
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and the appropriate messages. If you have syslogd running, these messages
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may also be found in syslogd's kernel log file. Nevertheless in some
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installations syslogd does not yet run, when init() is called, thus look for
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the aztcd-messages during init, before the login-prompt appears.
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Then look in aztcd.c, to find out, what happened. The normal calling sequence
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is: aztcd_init() during Linux bootup procedure init()
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after doing a 'mount -t iso9660 /dev/aztcd0 /mnt' the normal calling sequence is
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aztcd_open() -> Status 2c after cold reboot with CDROM or audio CD inserted
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-> Status 8 after warm reboot with CDROM inserted
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-> Status 2e after cold reboot with no disk, closed tray
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-> Status 6e after cold reboot, mount with door open
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aztUpdateToc()
|
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aztGetDiskInfo()
|
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aztGetQChannelInfo() repeated several times
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aztGetToc()
|
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aztGetQChannelInfo() repeated several times
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a list of track information
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do_aztcd_request() }
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azt_transfer() } repeated several times
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azt_poll }
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Check, if there is a difference in the calling sequence or the status flags!
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|
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There are a lot of other messages, eg. the ACMD-command code (defined in
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aztcd.h), status info from the getAztStatus-command and the state sequence of
|
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the finite state machine in azt_poll(). The most important are the status
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messages, look how they are defined and try to understand, if they make
|
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sense in the context where they appear. With a CD-ROM inserted the status
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should always be 8, except in aztcd_open(). Try to open the tray, insert an
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|
audio disk, insert no disk or reinsert the CD-ROM and check, if the status
|
|
bits change accordingly. The status bits are the most likely point, where
|
|
the drive manufacturers may implement changes.
|
|
|
|
If you still don't succeed, a good point to start is to look in aztcd.c in
|
|
function aztcd_init, where the drive should be detected during init. Do the
|
|
following:
|
|
-reboot the system with boot parameter 'aztcd=<your base address>,0x79'. With
|
|
parameter 0x79 most of the drive version detection is bypassed. After that
|
|
you should see the complete version string including leading and trailing
|
|
blanks during init.
|
|
Now adapt the statement
|
|
if ((result[1]=='A')&&(result[2]=='Z' ...)
|
|
in aztcd_init() to exactly match the first 3 or 4 letters you have seen.
|
|
-Another point is the 'smart' card detection feature in aztcd_init(). Normally
|
|
the CD-ROM drive is ready, when aztcd_init is trying to read the version
|
|
string and a time consuming ACMD_SOFT_RESET command can be avoided. This is
|
|
detected by looking, if AFL_OP_OK can be read correctly. If the CD-ROM drive
|
|
hangs in some unknown state, e.g. because of an error before a warm start or
|
|
because you first operated under DOS, even the version string may be correct,
|
|
but the following commands will not. Then change the code in such a way,
|
|
that the ACMD_SOFT_RESET is issued in any case, by substituting the
|
|
if-statement 'if ( ...=AFL_OP_OK)' by 'if (1)'.
|
|
|
|
If you succeed, please mail me the exact version string of your drive and
|
|
the code modifications, you have made together with a short explanation.
|
|
If you don't succeed, you may mail me the output of the debugging messages.
|
|
But remember, they are only useful, if they are exact and complete and you
|
|
describe in detail your hardware setup and what you did (cold/warm reboot,
|
|
with/without DOS, DOS-driver started/not started, which Linux-commands etc.)
|
|
|
|
|
|
9. TECHNICAL HISTORY OF THE DRIVER
|
|
The AZTECH-Driver is a rework of the Mitsumi-Driver. Four major items had to
|
|
be reworked:
|
|
|
|
a) The Mitsumi drive does issue complete status information acknowledging
|
|
each command, the Aztech drive does only signal that the command was
|
|
processed. So whenever the complete status information is needed, an extra
|
|
ACMD_GET_STATUS command is issued. The handshake procedure for the drive
|
|
can be found in the functions aztSendCmd(), sendAztCmd() and getAztStatus().
|
|
|
|
b) The Aztech Drive does not have a ACMD_GET_DISK_INFO command, so the
|
|
necessary info about the number of tracks (firstTrack, lastTrack), disk
|
|
length etc. has to be read from the TOC in the lead in track (see function
|
|
aztGetDiskInfo()).
|
|
|
|
c) Whenever data is read from the drive, the Mitsumi drive is started with a
|
|
command to read an indefinite (0xffffff) number of sectors. When the appropriate
|
|
number of sectors is read, the drive is stopped by a ACDM_STOP command. This
|
|
does not work with the Aztech drive. I did not find a way to stop it. The
|
|
stop and pause commands do only work in AUDIO mode but not in DATA mode.
|
|
Therefore I had to modify the 'finite state machine' in function azt_poll to
|
|
only read a certain number of sectors and then start a new read on demand. As I
|
|
have not completely understood, how the buffer/caching scheme of the Mitsumi
|
|
driver was implemented, I am not sure, if I have covered all cases correctly,
|
|
whenever you get timeout messages, the bug is most likely to be in that
|
|
function azt_poll() around switch(cmd) .... case ACD_S_DATA.
|
|
|
|
d) I did not get information about changing drive mode. So I doubt, that the
|
|
code around function azt_poll() case AZT_S_MODE does work. In my test I have
|
|
not been able to switch to reading in raw mode. For reading raw mode, Aztech
|
|
uses a different command than for cooked mode, which I only have implemen-
|
|
ted in the ioctl-section but not in the section which is used by the ISO9660.
|
|
|
|
The driver was developed on an AST PC with Intel 486/DX2, 8MB RAM, 340MB IDE
|
|
hard disk and on an AST PC with Intel Pentium 60MHz, 16MB RAM, 520MB IDE
|
|
running Linux kernel version 1.0.9 from the LST 1.8 Distribution. The kernel
|
|
was compiled with gcc.2.5.8. My CD-ROM drive is an Aztech CDA268-01A. My
|
|
drive says, that it has Firmware Version AZT26801A1.3. It came with an ISA-bus
|
|
interface card and works with polled I/O without DMA and without interrupts.
|
|
The code for all other drives was 'remote' tested and debugged by a number of
|
|
volunteers on the Internet.
|
|
|
|
Points, where I feel that possible problems might be and all points where I
|
|
did not completely understand the drive's behaviour or trust my own code are
|
|
marked with /*???*/ in the source code. There are also some parts in the
|
|
Mitsumi driver, where I did not completely understand their code.
|
|
|
|
|
|
10. ACKNOWLEDGMENTS
|
|
Without the help of P.Bush, Aztech, who delivered technical information
|
|
about the Aztech Drive and without the help of E.Moenkeberg, GWDG, who did a
|
|
great job in analyzing the command structure of various CD-ROM drives, this
|
|
work would not have been possible. E.Moenkeberg was also a great help in
|
|
making the software 'kernel ready' and in answering many of the CDROM-related
|
|
questions in the newsgroups. He really is *the* Linux CD-ROM guru. Thanks
|
|
also to all the guys on the Internet, who collected valuable technical
|
|
information about CDROMs.
|
|
|
|
Joe Nardone (joe@access.digex.net) was a patient tester even for my first
|
|
trial, which was more than slow, and made suggestions for code improvement.
|
|
Especially the 'finite state machine' azt_poll() was rewritten by Joe to get
|
|
clean C code and avoid the ugly 'gotos', which I copied from mcd.c.
|
|
|
|
Robby Schirmer (schirmer@fmi.uni-passau.de) tested the audio stuff (ioctls)
|
|
and suggested a lot of patches for them.
|
|
|
|
Joseph Piskor and Peter Nugent were the first users with the ORCHID CD3110
|
|
and also were very patient with the problems which occurred.
|
|
|
|
Reinhard Max delivered the information for the CDROM-interface of the
|
|
SoundWave32 soundcards.
|
|
|
|
Jochen Kunz and Olaf Kaluza delivered the information for supporting Conrad's
|
|
TXC drive.
|
|
|
|
Hilmar Berger delivered the patches for supporting CyCDROM CR520ie.
|
|
|
|
Anybody, who is interested in these items should have a look at 'ftp.gwdg.de',
|
|
directory 'pub/linux/cdrom' and at 'ftp.cdrom.com', directory 'pub/cdrom'.
|
|
|
|
11. PROGRAMMING ADD ONs: cdplay.c
|
|
You can use the ioctl-functions included in aztcd.c in your own programs. As
|
|
an example on how to do this, you will find a tiny CD Player for audio CDs
|
|
named 'cdplay.c'. It allows you to play audio CDs. You can play a specified
|
|
track, pause and resume or skip tracks forward and backwards. If you quit the
|
|
program without stopping the drive, playing is continued. You can also
|
|
(mis)use cdplay to read and hexdump data disks. You can find the code in the
|
|
APPENDIX of this file, which you should cut out with an editor and store in a
|
|
separate file 'cdplay.c'. To compile it and make it executable, do
|
|
gcc -s -Wall -O2 -L/usr/lib cdplay.c -o /usr/local/bin/cdplay # compiles it
|
|
chmod +755 /usr/local/bin/cdplay # makes it executable
|
|
ln -s /dev/aztcd0 /dev/cdrom # creates a link
|
|
(for /usr/lib substitute the top level directory, where your include files
|
|
reside, and for /usr/local/bin the directory, where you want the executable
|
|
binary to reside )
|
|
|
|
You have to set the correct permissions for cdplay *and* for /dev/mcd0 or
|
|
/dev/aztcd0 in order to use it. Remember, that you should not have /dev/cdrom
|
|
mounted, when you're playing audio CDs.
|
|
|
|
This program is just a hack for testing the ioctl-functions in aztcd.c. I will
|
|
not maintain it, so if you run into problems, discard it or have a look into
|
|
the source code 'cdplay.c'. The program does only contain a minimum of user
|
|
protection and input error detection. If you use the commands in the wrong
|
|
order or if you try to read a CD at wrong addresses, you may get error messages
|
|
or even hang your machine. If you get STEN_LOW, STEN_LOW_WAIT or segment violation
|
|
error messages when using cdplay, after that, the system might not be stable
|
|
any more, so you'd better reboot. As the ioctl-functions run in kernel mode,
|
|
most normal Linux-multitasking protection features do not work. By using
|
|
uninitialized 'wild' pointers etc., it is easy to write to other users' data
|
|
and program areas, destroy kernel tables etc.. So if you experiment with ioctls
|
|
as always when you are doing systems programming and kernel hacking, you
|
|
should have a backup copy of your system in a safe place (and you also
|
|
should try restoring from a backup copy first)!
|
|
|
|
A reworked and improved version called 'cdtester.c', which has yet more
|
|
features for testing CDROM-drives can be found in
|
|
Documentation/cdrom/sbpcd, written by E.Moenkeberg.
|
|
|
|
Werner Zimmermann
|
|
Fachhochschule fuer Technik Esslingen
|
|
(EMail: Werner.Zimmermann@fht-esslingen.de)
|
|
October, 1997
|
|
|
|
---------------------------------------------------------------------------
|
|
APPENDIX: Source code of cdplay.c
|
|
|
|
/* Tiny Audio CD Player
|
|
|
|
Copyright 1994, 1995, 1996 Werner Zimmermann (Werner.Zimmermann@fht-esslingen.de)
|
|
|
|
This program originally was written to test the audio functions of the
|
|
AZTECH.CDROM-driver, but it should work with every CD-ROM drive. Before
|
|
using it, you should set a symlink from /dev/cdrom to your real CDROM
|
|
device.
|
|
|
|
The GNU General Public License applies to this program.
|
|
|
|
History: V0.1 W.Zimmermann: First release. Nov. 8, 1994
|
|
V0.2 W.Zimmermann: Enhanced functionality. Nov. 9, 1994
|
|
V0.3 W.Zimmermann: Additional functions. Nov. 28, 1994
|
|
V0.4 W.Zimmermann: fixed some bugs. Dec. 17, 1994
|
|
V0.5 W.Zimmermann: clean 'scanf' commands without compiler warnings
|
|
Jan. 6, 1995
|
|
V0.6 W.Zimmermann: volume control (still experimental). Jan. 24, 1995
|
|
V0.7 W.Zimmermann: read raw modified. July 26, 95
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <linux/cdrom.h>
|
|
#include <linux/../../drivers/cdrom/aztcd.h>
|
|
|
|
void help(void)
|
|
{ printf("Available Commands: STOP s EJECT/CLOSE e QUIT q\n");
|
|
printf(" PLAY TRACK t PAUSE p RESUME r\n");
|
|
printf(" NEXT TRACK n REPEAT LAST l HELP h\n");
|
|
printf(" SUB CHANNEL c TRACK INFO i PLAY AT a\n");
|
|
printf(" READ d READ RAW w VOLUME v\n");
|
|
}
|
|
|
|
int main(void)
|
|
{ int handle;
|
|
unsigned char command=' ', ini=0, first=1, last=1;
|
|
unsigned int cmd, i,j,k, arg1,arg2,arg3;
|
|
struct cdrom_ti ti;
|
|
struct cdrom_tochdr tocHdr;
|
|
struct cdrom_subchnl subchnl;
|
|
struct cdrom_tocentry entry;
|
|
struct cdrom_msf msf;
|
|
union { struct cdrom_msf msf;
|
|
unsigned char buf[CD_FRAMESIZE_RAW];
|
|
} azt;
|
|
struct cdrom_volctrl volctrl;
|
|
|
|
printf("\nMini-Audio CD-Player V0.72 (C) 1994,1995,1996 W.Zimmermann\n");
|
|
handle=open("/dev/cdrom",O_RDWR);
|
|
ioctl(handle,CDROMRESUME);
|
|
|
|
if (handle<=0)
|
|
{ printf("Drive Error: already playing, no audio disk, door open\n");
|
|
printf(" or no permission (you must be ROOT in order to use this program)\n");
|
|
}
|
|
else
|
|
{ help();
|
|
while (1)
|
|
{ printf("Type command (h = help): ");
|
|
scanf("%s",&command);
|
|
switch (command)
|
|
{ case 'e': cmd=CDROMEJECT;
|
|
ioctl(handle,cmd);
|
|
break;
|
|
case 'p': if (!ini)
|
|
{ printf("Command not allowed - play track first\n");
|
|
}
|
|
else
|
|
{ cmd=CDROMPAUSE;
|
|
if (ioctl(handle,cmd)) printf("Drive Error\n");
|
|
}
|
|
break;
|
|
case 'r': if (!ini)
|
|
{ printf("Command not allowed - play track first\n");
|
|
}
|
|
else
|
|
{ cmd=CDROMRESUME;
|
|
if (ioctl(handle,cmd)) printf("Drive Error\n");
|
|
}
|
|
break;
|
|
case 's': cmd=CDROMPAUSE;
|
|
if (ioctl(handle,cmd)) printf("Drive error or already stopped\n");
|
|
cmd=CDROMSTOP;
|
|
if (ioctl(handle,cmd)) printf("Drive error\n");
|
|
break;
|
|
case 't': cmd=CDROMREADTOCHDR;
|
|
if (ioctl(handle,cmd,&tocHdr)) printf("Drive Error\n");
|
|
first=tocHdr.cdth_trk0;
|
|
last= tocHdr.cdth_trk1;
|
|
if ((first==0)||(first>last))
|
|
{ printf ("--could not read TOC\n");
|
|
}
|
|
else
|
|
{ printf("--first track: %d --last track: %d --enter track number: ",first,last);
|
|
cmd=CDROMPLAYTRKIND;
|
|
scanf("%i",&arg1);
|
|
ti.cdti_trk0=arg1;
|
|
if (ti.cdti_trk0<first) ti.cdti_trk0=first;
|
|
if (ti.cdti_trk0>last) ti.cdti_trk0=last;
|
|
ti.cdti_ind0=0;
|
|
ti.cdti_trk1=last;
|
|
ti.cdti_ind1=0;
|
|
if (ioctl(handle,cmd,&ti)) printf("Drive Error\n");
|
|
ini=1;
|
|
}
|
|
break;
|
|
case 'n': if (!ini++)
|
|
{ if (ioctl(handle,CDROMREADTOCHDR,&tocHdr)) printf("Drive Error\n");
|
|
first=tocHdr.cdth_trk0;
|
|
last= tocHdr.cdth_trk1;
|
|
ti.cdti_trk0=first-1;
|
|
}
|
|
if ((first==0)||(first>last))
|
|
{ printf ("--could not read TOC\n");
|
|
}
|
|
else
|
|
{ cmd=CDROMPLAYTRKIND;
|
|
if (++ti.cdti_trk0 > last) ti.cdti_trk0=last;
|
|
ti.cdti_ind0=0;
|
|
ti.cdti_trk1=last;
|
|
ti.cdti_ind1=0;
|
|
if (ioctl(handle,cmd,&ti)) printf("Drive Error\n");
|
|
ini=1;
|
|
}
|
|
break;
|
|
case 'l': if (!ini++)
|
|
{ if (ioctl(handle,CDROMREADTOCHDR,&tocHdr)) printf("Drive Error\n");
|
|
first=tocHdr.cdth_trk0;
|
|
last= tocHdr.cdth_trk1;
|
|
ti.cdti_trk0=first+1;
|
|
}
|
|
if ((first==0)||(first>last))
|
|
{ printf ("--could not read TOC\n");
|
|
}
|
|
else
|
|
{ cmd=CDROMPLAYTRKIND;
|
|
if (--ti.cdti_trk0 < first) ti.cdti_trk0=first;
|
|
ti.cdti_ind0=0;
|
|
ti.cdti_trk1=last;
|
|
ti.cdti_ind1=0;
|
|
if (ioctl(handle,cmd,&ti)) printf("Drive Error\n");
|
|
ini=1;
|
|
}
|
|
break;
|
|
case 'c': subchnl.cdsc_format=CDROM_MSF;
|
|
if (ioctl(handle,CDROMSUBCHNL,&subchnl))
|
|
printf("Drive Error\n");
|
|
else
|
|
{ printf("AudioStatus:%s Track:%d Mode:%d MSF=%d:%d:%d\n", \
|
|
subchnl.cdsc_audiostatus==CDROM_AUDIO_PLAY ? "PLAYING":"NOT PLAYING",\
|
|
subchnl.cdsc_trk,subchnl.cdsc_adr, \
|
|
subchnl.cdsc_absaddr.msf.minute, subchnl.cdsc_absaddr.msf.second, \
|
|
subchnl.cdsc_absaddr.msf.frame);
|
|
}
|
|
break;
|
|
case 'i': if (!ini)
|
|
{ printf("Command not allowed - play track first\n");
|
|
}
|
|
else
|
|
{ cmd=CDROMREADTOCENTRY;
|
|
printf("Track No.: ");
|
|
scanf("%d",&arg1);
|
|
entry.cdte_track=arg1;
|
|
if (entry.cdte_track<first) entry.cdte_track=first;
|
|
if (entry.cdte_track>last) entry.cdte_track=last;
|
|
entry.cdte_format=CDROM_MSF;
|
|
if (ioctl(handle,cmd,&entry))
|
|
{ printf("Drive error or invalid track no.\n");
|
|
}
|
|
else
|
|
{ printf("Mode %d Track, starts at %d:%d:%d\n", \
|
|
entry.cdte_adr,entry.cdte_addr.msf.minute, \
|
|
entry.cdte_addr.msf.second,entry.cdte_addr.msf.frame);
|
|
}
|
|
}
|
|
break;
|
|
case 'a': cmd=CDROMPLAYMSF;
|
|
printf("Address (min:sec:frame) ");
|
|
scanf("%d:%d:%d",&arg1,&arg2,&arg3);
|
|
msf.cdmsf_min0 =arg1;
|
|
msf.cdmsf_sec0 =arg2;
|
|
msf.cdmsf_frame0=arg3;
|
|
if (msf.cdmsf_sec0 > 59) msf.cdmsf_sec0 =59;
|
|
if (msf.cdmsf_frame0> 74) msf.cdmsf_frame0=74;
|
|
msf.cdmsf_min1=60;
|
|
msf.cdmsf_sec1=00;
|
|
msf.cdmsf_frame1=00;
|
|
if (ioctl(handle,cmd,&msf))
|
|
{ printf("Drive error or invalid address\n");
|
|
}
|
|
break;
|
|
#ifdef AZT_PRIVATE_IOCTLS /*not supported by every CDROM driver*/
|
|
case 'd': cmd=CDROMREADCOOKED;
|
|
printf("Address (min:sec:frame) ");
|
|
scanf("%d:%d:%d",&arg1,&arg2,&arg3);
|
|
azt.msf.cdmsf_min0 =arg1;
|
|
azt.msf.cdmsf_sec0 =arg2;
|
|
azt.msf.cdmsf_frame0=arg3;
|
|
if (azt.msf.cdmsf_sec0 > 59) azt.msf.cdmsf_sec0 =59;
|
|
if (azt.msf.cdmsf_frame0> 74) azt.msf.cdmsf_frame0=74;
|
|
if (ioctl(handle,cmd,&azt.msf))
|
|
{ printf("Drive error, invalid address or unsupported command\n");
|
|
}
|
|
k=0;
|
|
getchar();
|
|
for (i=0;i<128;i++)
|
|
{ printf("%4d:",i*16);
|
|
for (j=0;j<16;j++)
|
|
{ printf("%2x ",azt.buf[i*16+j]);
|
|
}
|
|
for (j=0;j<16;j++)
|
|
{ if (isalnum(azt.buf[i*16+j]))
|
|
printf("%c",azt.buf[i*16+j]);
|
|
else
|
|
printf(".");
|
|
}
|
|
printf("\n");
|
|
k++;
|
|
if (k>=20)
|
|
{ printf("press ENTER to continue\n");
|
|
getchar();
|
|
k=0;
|
|
}
|
|
}
|
|
break;
|
|
case 'w': cmd=CDROMREADRAW;
|
|
printf("Address (min:sec:frame) ");
|
|
scanf("%d:%d:%d",&arg1,&arg2,&arg3);
|
|
azt.msf.cdmsf_min0 =arg1;
|
|
azt.msf.cdmsf_sec0 =arg2;
|
|
azt.msf.cdmsf_frame0=arg3;
|
|
if (azt.msf.cdmsf_sec0 > 59) azt.msf.cdmsf_sec0 =59;
|
|
if (azt.msf.cdmsf_frame0> 74) azt.msf.cdmsf_frame0=74;
|
|
if (ioctl(handle,cmd,&azt))
|
|
{ printf("Drive error, invalid address or unsupported command\n");
|
|
}
|
|
k=0;
|
|
for (i=0;i<147;i++)
|
|
{ printf("%4d:",i*16);
|
|
for (j=0;j<16;j++)
|
|
{ printf("%2x ",azt.buf[i*16+j]);
|
|
}
|
|
for (j=0;j<16;j++)
|
|
{ if (isalnum(azt.buf[i*16+j]))
|
|
printf("%c",azt.buf[i*16+j]);
|
|
else
|
|
printf(".");
|
|
}
|
|
printf("\n");
|
|
k++;
|
|
if (k>=20)
|
|
{ getchar();
|
|
k=0;
|
|
}
|
|
}
|
|
break;
|
|
#endif
|
|
case 'v': cmd=CDROMVOLCTRL;
|
|
printf("--Channel 0 Left (0-255): ");
|
|
scanf("%d",&arg1);
|
|
printf("--Channel 1 Right (0-255): ");
|
|
scanf("%d",&arg2);
|
|
volctrl.channel0=arg1;
|
|
volctrl.channel1=arg2;
|
|
volctrl.channel2=0;
|
|
volctrl.channel3=0;
|
|
if (ioctl(handle,cmd,&volctrl))
|
|
{ printf("Drive error or unsupported command\n");
|
|
}
|
|
break;
|
|
case 'q': if (close(handle)) printf("Drive Error: CLOSE\n");
|
|
exit(0);
|
|
case 'h': help();
|
|
break;
|
|
default: printf("unknown command\n");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|