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1 | This is the readme file for the driver for the Philips/LMS cdrom drive | ||
2 | cm206 in combination with the cm260 host adapter card. | ||
3 | |||
4 | (c) 1995 David A. van Leeuwen | ||
5 | |||
6 | Changes since version 0.99 | ||
7 | -------------------------- | ||
8 | - Interfacing to the kernel is routed though an extra interface layer, | ||
9 | cdrom.c. This allows runtime-configurable `behavior' of the cdrom-drive, | ||
10 | independent of the driver. | ||
11 | |||
12 | Features since version 0.33 | ||
13 | --------------------------- | ||
14 | - Full audio support, that is, both workman, workbone and cdp work | ||
15 | now reasonably. Reading TOC still takes some time. xmcd has been | ||
16 | reported to run successfully. | ||
17 | - Made auto-probe code a little better, I hope | ||
18 | |||
19 | Features since version 0.28 | ||
20 | --------------------------- | ||
21 | - Full speed transfer rate (300 kB/s). | ||
22 | - Minimum kernel memory usage for buffering (less than 3 kB). | ||
23 | - Multisession support. | ||
24 | - Tray locking. | ||
25 | - Statistics of driver accessible to the user. | ||
26 | - Module support. | ||
27 | - Auto-probing of adapter card's base port and irq line, | ||
28 | also configurable at boot time or module load time. | ||
29 | |||
30 | |||
31 | Decide how you are going to use the driver. There are two | ||
32 | options: | ||
33 | |||
34 | (a) installing the driver as a resident part of the kernel | ||
35 | (b) compiling the driver as a loadable module | ||
36 | |||
37 | Further, you must decide if you are going to specify the base port | ||
38 | address and the interrupt request line of the adapter card cm260 as | ||
39 | boot options for (a), module parameters for (b), use automatic | ||
40 | probing of these values, or hard-wire your adaptor card's settings | ||
41 | into the source code. If you don't care, you can choose | ||
42 | autoprobing, which is the default. In that case you can move on to | ||
43 | the next step. | ||
44 | |||
45 | Compiling the kernel | ||
46 | -------------------- | ||
47 | 1) move to /usr/src/linux and do a | ||
48 | |||
49 | make config | ||
50 | |||
51 | If you have chosen option (a), answer yes to CONFIG_CM206 and | ||
52 | CONFIG_ISO9660_FS. | ||
53 | |||
54 | If you have chosen option (b), answer yes to CONFIG_MODVERSIONS | ||
55 | and no (!) to CONFIG_CM206 and CONFIG_ISO9660_FS. | ||
56 | |||
57 | 2) then do a | ||
58 | |||
59 | make clean; make zImage; make modules | ||
60 | |||
61 | 3) do the usual things to install a new image (backup the old one, run | ||
62 | `rdev -R zImage 1', copy the new image in place, run lilo). Might | ||
63 | be `make zlilo'. | ||
64 | |||
65 | Using the driver as a module | ||
66 | ---------------------------- | ||
67 | If you will only occasionally use the cd-rom driver, you can choose | ||
68 | option (b), install as a loadable module. You may have to re-compile | ||
69 | the module when you upgrade the kernel to a new version. | ||
70 | |||
71 | Since version 0.96, much of the functionality has been transferred to | ||
72 | a generic cdrom interface in the file cdrom.c. The module cm206.o | ||
73 | depends on cdrom.o. If the latter is not compiled into the kernel, | ||
74 | you must explicitly load it before cm206.o: | ||
75 | |||
76 | insmod /usr/src/linux/modules/cdrom.o | ||
77 | |||
78 | To install the module, you use the command, as root | ||
79 | |||
80 | insmod /usr/src/linux/modules/cm206.o | ||
81 | |||
82 | You can specify the base address on the command line as well as the irq | ||
83 | line to be used, e.g. | ||
84 | |||
85 | insmod /usr/src/linux/modules/cm206.o cm206=0x300,11 | ||
86 | |||
87 | The order of base port and irq line doesn't matter; if you specify only | ||
88 | one, the other will have the value of the compiled-in default. You | ||
89 | may also have to install the file-system module `iso9660.o', if you | ||
90 | didn't compile that into the kernel. | ||
91 | |||
92 | |||
93 | Using the driver as part of the kernel | ||
94 | -------------------------------------- | ||
95 | If you have chosen option (a), you can specify the base-port | ||
96 | address and irq on the lilo boot command line, e.g.: | ||
97 | |||
98 | LILO: linux cm206=0x340,11 | ||
99 | |||
100 | This assumes that your linux kernel image keyword is `linux'. | ||
101 | If you specify either IRQ (3--11) or base port (0x300--0x370), | ||
102 | auto probing is turned off for both settings, thus setting the | ||
103 | other value to the compiled-in default. | ||
104 | |||
105 | Note that you can also put these parameters in the lilo configuration file: | ||
106 | |||
107 | # linux config | ||
108 | image = /vmlinuz | ||
109 | root = /dev/hda1 | ||
110 | label = Linux | ||
111 | append = "cm206=0x340,11" | ||
112 | read-only | ||
113 | |||
114 | |||
115 | If module parameters and LILO config options don't work | ||
116 | ------------------------------------------------------- | ||
117 | If autoprobing does not work, you can hard-wire the default values | ||
118 | of the base port address (CM206_BASE) and interrupt request line | ||
119 | (CM206_IRQ) into the file /usr/src/linux/drivers/cdrom/cm206.h. Change | ||
120 | the defines of CM206_IRQ and CM206_BASE. | ||
121 | |||
122 | |||
123 | Mounting the cdrom | ||
124 | ------------------ | ||
125 | 1) Make sure that the right device is installed in /dev. | ||
126 | |||
127 | mknod /dev/cm206cd b 32 0 | ||
128 | |||
129 | 2) Make sure there is a mount point, e.g., /cdrom | ||
130 | |||
131 | mkdir /cdrom | ||
132 | |||
133 | 3) mount using a command like this (run as root): | ||
134 | |||
135 | mount -rt iso9660 /dev/cm206cd /cdrom | ||
136 | |||
137 | 4) For user-mounts, add a line in /etc/fstab | ||
138 | |||
139 | /dev/cm206cd /cdrom iso9660 ro,noauto,user | ||
140 | |||
141 | This will allow users to give the commands | ||
142 | |||
143 | mount /cdrom | ||
144 | umount /cdrom | ||
145 | |||
146 | If things don't work | ||
147 | -------------------- | ||
148 | |||
149 | - Try to do a `dmesg' to find out if the driver said anything about | ||
150 | what is going wrong during the initialization. | ||
151 | |||
152 | - Try to do a `dd if=/dev/cm206cd | od -tc | less' to read from the | ||
153 | CD. | ||
154 | |||
155 | - Look in the /proc directory to see if `cm206' shows up under one of | ||
156 | `interrupts', `ioports', `devices' or `modules' (if applicable). | ||
157 | |||
158 | |||
159 | DISCLAIMER | ||
160 | ---------- | ||
161 | I cannot guarantee that this driver works, or that the hardware will | ||
162 | not be harmed, although I consider it most unlikely. | ||
163 | |||
164 | I hope that you'll find this driver in some way useful. | ||
165 | |||
166 | David van Leeuwen | ||
167 | david@tm.tno.nl | ||
168 | |||
169 | Note for Linux CDROM vendors | ||
170 | ----------------------------- | ||
171 | You are encouraged to include this driver on your Linux CDROM. If | ||
172 | you do, you might consider sending me a free copy of that cd-rom. | ||
173 | You can contact me through my e-mail address, david@tm.tno.nl. | ||
174 | If this driver is compiled into a kernel to boot off a cdrom, | ||
175 | you should actually send me a free copy of that cd-rom. | ||
176 | |||
177 | Copyright | ||
178 | --------- | ||
179 | The copyright of the cm206 driver for Linux is | ||
180 | |||
181 | (c) 1995 David A. van Leeuwen | ||
182 | |||
183 | The driver is released under the conditions of the GNU general public | ||
184 | license, which can be found in the file COPYING in the root of this | ||
185 | source tree. | ||