1 -- Documentation/cdrom/isp16
2
3 Docs by Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl>
4
5 This is the README for version 0.6 of the cdrom interface on an
6 ISP16, MAD16 or Mozart sound card.
7
8 The detection and configuration of this interface used to be included
9 in both the sjcd and optcd cdrom driver. Drives supported by these
10 drivers came packed with Media Magic's multi media kit, which also
11 included the ISP16 card. The idea (thanks Leo Spiekman)
12 to move it from these drivers into a separate module and moreover, not to
13 rely on the MAD16 sound driver, are as follows:
14 -duplication of code in the kernel is a waste of resources and should
15 be avoided;
16 -however, kernels and notably those included with Linux distributions
17 (cf Slackware 3.0 included version 0.5 of the isp16 configuration
18 code included in the drivers) don't always come with sound support
19 included. Especially when they already include a bunch of cdrom drivers.
20 Hence, the cdrom interface should be configurable _independently_ of
21 sound support.
22
23 The ISP16, MAD16 and Mozart sound cards have an OPTi 82C928 or an
24 OPTi 82C929 chip. The interface on these cards should work with
25 any cdrom attached to the card, which is 'electrically' compatible
26 with Sanyo/Panasonic, Sony or Mitsumi non-ide drives. However, the
27 command sets for any proprietary drives may differ
28 (and hence may not be supported in the kernel) from these four types.
29 For a fact I know the interface works and the way of configuration
30 as described in this documentation works in combination with the
31 sjcd (in Sanyo/Panasonic compatibility mode) cdrom drivers
32 (probably with the optcd (in Sony compatibility mode) as well).
33 If you have such an OPTi based sound card and you want to use the
34 cdrom interface with a cdrom drive supported by any of the other cdrom
35 drivers, it will probably work. Please let me know any experience you
36 might have).
37 I understand that cards based on the OPTi 82C929 chips may be configured
38 (hardware jumpers that is) as an IDE interface. Initialisation of such a
39 card in this mode is not supported (yet?).
40
41 The suggestion to configure the ISP16 etc. sound card by booting DOS and
42 do a warm reboot to boot Linux somehow doesn't work, at least not
43 on my machine (IPC P90), with the OPTi 82C928 based card.
44
45 Booting the kernel through the boot manager LILO allows the use
46 of some command line options on the 'LILO boot:' prompt. At boot time
47 press Alt or Shift while the LILO prompt is written on the screen and enter
48 any kernel options. Alternatively these options may be used in
49 the appropriate section in /etc/lilo.conf. Adding 'append="<cmd_line_options>"'
50 will do the trick as well.
51 The syntax of 'cmd_line_options' is
52
53 isp16=[<port>[,<irq>[,<dma>]]][[,]<drive_type>]
54
55 If there is no ISP16 or compatibles detected, there's probably no harm done.
56 These options indicate the values that your cdrom drive has been (or will be)
57 configured to use.
58 Valid values for the base i/o address are:
59 port=0x340,0x320,0x330,0x360
60 for the interrupt request number
61 irq=0,3,5,7,9,10,11
62 for the direct memory access line
63 dma=0,3,5,6,7
64 and for the type of drive
65 drive_type=noisp16,Sanyo,Panasonic,Sony,Mitsumi.
66 Note that these options are case sensitive.
67 The values 0 for irq and dma indicate that they are not used, and
68 the drive will be used in 'polling' mode. The values 5 and 7 for irq
69 should be avoided in order to avoid any conflicts with optional
70 sound card configuration.
71 The syntax of the command line does not allow the specification of
72 irq when there's nothing specified for the base address and no
73 specification of dma when there is no specification of irq.
74 The value 'noisp16' for drive_type, which may be used as the first
75 non-integer option value (e.g. 'isp16=noisp16'), makes sure that probing
76 for and subsequent configuration of an ISP16-compatible card is skipped
77 all together. This can be useful to overcome possible conflicts which
78 may arise while the kernel is probing your hardware.
79 The default values are
80 port=0x340
81 irq=0
82 dma=0
83 drive_type=Sanyo
84 reflecting my own configuration. The defaults can be changed in
85 the file linux/drivers/cdrom/ips16.h.
86
87 The cdrom interface can be configured at run time by loading the
88 initialisation driver as a module. In that case, the interface
89 parameters can be set by giving appropriate values on the command
90 line. Configuring the driver can then be done by the following
91 command (assuming you have iso16.o installed in a proper place):
92
93 insmod isp16.o isp16_cdrom_base=<port> isp16_cdrom_irq=<irq> \
94 isp16_cdrom_dma=<dma> isp16_cdrom_type=<drive_type>
95
96 where port, irq, dma and drive_type can have any of the values mentioned
97 above.
98
99
100 Have fun!
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