cm206
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- This is the readme file for the driver for the Philips/LMS cdrom drive
- cm206 in combination with the cm260 host adapter card.
- (c) 1995 David A. van Leeuwen
-
- Changes since version 0.99
- --------------------------
- - Interfacing to the kernel is routed though an extra interface layer,
- cdrom.c. This allows runtime-configurable `behavior' of the cdrom-drive,
- independent of the driver.
- Features since version 0.33
- ---------------------------
- - Full audio support, that is, both workman, workbone and cdp work
- now reasonably. Reading TOC still takes some time. xmcd has been
- reported to run successfully.
- - Made auto-probe code a little better, I hope
- Features since version 0.28
- ---------------------------
- - Full speed transfer rate (300 kB/s).
- - Minimum kernel memory usage for buffering (less than 3 kB).
- - Multisession support.
- - Tray locking.
- - Statistics of driver accessible to the user.
- - Module support.
- - Auto-probing of adapter card's base port and irq line,
- also configurable at boot time or module load time.
- Decide how you are going to use the driver. There are two
- options:
- (a) installing the driver as a resident part of the kernel
- (b) compiling the driver as a loadable module
- Further, you must decide if you are going to specify the base port
- address and the interrupt request line of the adapter card cm260 as
- boot options for (a), module parameters for (b), use automatic
- probing of these values, or hard-wire your adaptor card's settings
- into the source code. If you don't care, you can choose
- autoprobing, which is the default. In that case you can move on to
- the next step.
- Compiling the kernel
- --------------------
- 1) move to /usr/src/linux and do a
- make config
- If you have chosen option (a), answer yes to CONFIG_CM206 and
- CONFIG_ISO9660_FS.
- If you have chosen option (b), answer yes to CONFIG_MODVERSIONS
- and no (!) to CONFIG_CM206 and CONFIG_ISO9660_FS.
- 2) then do a
-
- make dep; make clean; make zImage; make modules
- 3) do the usual things to install a new image (backup the old one, run
- `rdev -R zImage 1', copy the new image in place, run lilo). Might
- be `make zlilo'.
- Using the driver as a module
- ----------------------------
- If you will only occasionally use the cd-rom driver, you can choose
- option (b), install as a loadable module. You may have to re-compile
- the module when you upgrade the kernel to a new version.
- Since version 0.96, much of the functionality has been transferred to
- a generic cdrom interface in the file cdrom.c. The module cm206.o
- depends on cdrom.o. If the latter is not compiled into the kernel,
- you must explicitly load it before cm206.o:
- insmod /usr/src/linux/modules/cdrom.o
- To install the module, you use the command, as root
- insmod /usr/src/linux/modules/cm206.o
- You can specify the base address on the command line as well as the irq
- line to be used, e.g.
- insmod /usr/src/linux/modules/cm206.o cm206=0x300,11
- The order of base port and irq line doesn't matter; if you specify only
- one, the other will have the value of the compiled-in default. You
- may also have to install the file-system module `iso9660.o', if you
- didn't compile that into the kernel.
- Using the driver as part of the kernel
- --------------------------------------
- If you have chosen option (a), you can specify the base-port
- address and irq on the lilo boot command line, e.g.:
- LILO: linux cm206=0x340,11
- This assumes that your linux kernel image keyword is `linux'.
- If you specify either IRQ (3--11) or base port (0x300--0x370),
- auto probing is turned off for both settings, thus setting the
- other value to the compiled-in default.
- Note that you can also put these parameters in the lilo configuration file:
- # linux config
- image = /vmlinuz
- root = /dev/hda1
- label = Linux
- append = "cm206=0x340,11"
- read-only
- If module parameters and LILO config options don't work
- -------------------------------------------------------
- If autoprobing does not work, you can hard-wire the default values
- of the base port address (CM206_BASE) and interrupt request line
- (CM206_IRQ) into the file /usr/src/linux/drivers/cdrom/cm206.h. Change
- the defines of CM206_IRQ and CM206_BASE.
- Mounting the cdrom
- ------------------
- 1) Make sure that the right device is installed in /dev.
- mknod /dev/cm206cd b 32 0
- 2) Make sure there is a mount point, e.g., /cdrom
- mkdir /cdrom
- 3) mount using a command like this (run as root):
- mount -rt iso9660 /dev/cm206cd /cdrom
- 4) For user-mounts, add a line in /etc/fstab
- /dev/cm206cd /cdrom iso9660 ro,noauto,user
- This will allow users to give the commands
- mount /cdrom
- umount /cdrom
- If things don't work
- --------------------
- - Try to do a `dmesg' to find out if the driver said anything about
- what is going wrong during the initialization.
- - Try to do a `dd if=/dev/cm206cd | od -tc | less' to read from the
- CD.
- - Look in the /proc directory to see if `cm206' shows up under one of
- `interrupts', `ioports', `devices' or `modules' (if applicable).
- DISCLAIMER
- ----------
- I cannot guarantee that this driver works, or that the hardware will
- not be harmed, although I consider it most unlikely.
- I hope that you'll find this driver in some way useful.
- David van Leeuwen
- david@tm.tno.nl
- Note for Linux CDROM vendors
- -----------------------------
- You are encouraged to include this driver on your Linux CDROM. If
- you do, you might consider sending me a free copy of that cd-rom.
- You can contact me through my e-mail address, david@tm.tno.nl.
- If this driver is compiled into a kernel to boot off a cdrom,
- you should actually send me a free copy of that cd-rom.
- Copyright
- ---------
- The copyright of the cm206 driver for Linux is
- (c) 1995 David A. van Leeuwen
- The driver is released under the conditions of the GNU general public
- license, which can be found in the file COPYING in the root of this
- source tree.