| -- Documentation/cdrom/isp16 |
| |
| Docs by Eric van der Maarel <H.T.M.v.d.Maarel@marin.nl> |
| |
| This is the README for version 0.6 of the cdrom interface on an |
| ISP16, MAD16 or Mozart sound card. |
| |
| The detection and configuration of this interface used to be included |
| in both the sjcd and optcd cdrom driver. Drives supported by these |
| drivers came packed with Media Magic's multi media kit, which also |
| included the ISP16 card. The idea (thanks Leo Spiekman) |
| to move it from these drivers into a separate module and moreover, not to |
| rely on the MAD16 sound driver, are as follows: |
| -duplication of code in the kernel is a waste of resources and should |
| be avoided; |
| -however, kernels and notably those included with Linux distributions |
| (cf Slackware 3.0 included version 0.5 of the isp16 configuration |
| code included in the drivers) don't always come with sound support |
| included. Especially when they already include a bunch of cdrom drivers. |
| Hence, the cdrom interface should be configurable _independently_ of |
| sound support. |
| |
| The ISP16, MAD16 and Mozart sound cards have an OPTi 82C928 or an |
| OPTi 82C929 chip. The interface on these cards should work with |
| any cdrom attached to the card, which is 'electrically' compatible |
| with Sanyo/Panasonic, Sony or Mitsumi non-ide drives. However, the |
| command sets for any proprietary drives may differ |
| (and hence may not be supported in the kernel) from these four types. |
| For a fact I know the interface works and the way of configuration |
| as described in this documentation works in combination with the |
| sjcd (in Sanyo/Panasonic compatibility mode) cdrom drivers |
| (probably with the optcd (in Sony compatibility mode) as well). |
| If you have such an OPTi based sound card and you want to use the |
| cdrom interface with a cdrom drive supported by any of the other cdrom |
| drivers, it will probably work. Please let me know any experience you |
| might have). |
| I understand that cards based on the OPTi 82C929 chips may be configured |
| (hardware jumpers that is) as an IDE interface. Initialisation of such a |
| card in this mode is not supported (yet?). |
| |
| The suggestion to configure the ISP16 etc. sound card by booting DOS and |
| do a warm reboot to boot Linux somehow doesn't work, at least not |
| on my machine (IPC P90), with the OPTi 82C928 based card. |
| |
| Booting the kernel through the boot manager LILO allows the use |
| of some command line options on the 'LILO boot:' prompt. At boot time |
| press Alt or Shift while the LILO prompt is written on the screen and enter |
| any kernel options. Alternatively these options may be used in |
| the appropriate section in /etc/lilo.conf. Adding 'append="<cmd_line_options>"' |
| will do the trick as well. |
| The syntax of 'cmd_line_options' is |
| |
| isp16=[<port>[,<irq>[,<dma>]]][[,]<drive_type>] |
| |
| If there is no ISP16 or compatibles detected, there's probably no harm done. |
| These options indicate the values that your cdrom drive has been (or will be) |
| configured to use. |
| Valid values for the base i/o address are: |
| port=0x340,0x320,0x330,0x360 |
| for the interrupt request number |
| irq=0,3,5,7,9,10,11 |
| for the direct memory access line |
| dma=0,3,5,6,7 |
| and for the type of drive |
| drive_type=noisp16,Sanyo,Panasonic,Sony,Mitsumi. |
| Note that these options are case sensitive. |
| The values 0 for irq and dma indicate that they are not used, and |
| the drive will be used in 'polling' mode. The values 5 and 7 for irq |
| should be avoided in order to avoid any conflicts with optional |
| sound card configuration. |
| The syntax of the command line does not allow the specification of |
| irq when there's nothing specified for the base address and no |
| specification of dma when there is no specification of irq. |
| The value 'noisp16' for drive_type, which may be used as the first |
| non-integer option value (e.g. 'isp16=noisp16'), makes sure that probing |
| for and subsequent configuration of an ISP16-compatible card is skipped |
| all together. This can be useful to overcome possible conflicts which |
| may arise while the kernel is probing your hardware. |
| The default values are |
| port=0x340 |
| irq=0 |
| dma=0 |
| drive_type=Sanyo |
| reflecting my own configuration. The defaults can be changed in |
| the file linux/drivers/cdrom/ips16.h. |
| |
| The cdrom interface can be configured at run time by loading the |
| initialisation driver as a module. In that case, the interface |
| parameters can be set by giving appropriate values on the command |
| line. Configuring the driver can then be done by the following |
| command (assuming you have iso16.o installed in a proper place): |
| |
| insmod isp16.o isp16_cdrom_base=<port> isp16_cdrom_irq=<irq> \ |
| isp16_cdrom_dma=<dma> isp16_cdrom_type=<drive_type> |
| |
| where port, irq, dma and drive_type can have any of the values mentioned |
| above. |
| |
| |
| Have fun! |