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 cards settings into the source code. If you don't care, you can choose for 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 for option (a), answer yes to CONFIG_CM206 and CONFIG_ISO9660_FS. If you have chosen for 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 seldomly use the cd-rom driver, you can choose for 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; you may 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 for 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 may 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 put these parameters also 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 ./include/linux/cm206.h. Change the defines of CM206_IRQ and CM206_BASE. Mounting the cdrom ------------------ 1) Make sure that there is the right device 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.