patch-1.3.36 linux/drivers/block/README.cdu31a
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- Lines: 161
- Date:
Thu Jan 1 02:00:00 1970
- Orig file:
v1.3.35/linux/drivers/block/README.cdu31a
- Orig date:
Fri Jul 7 08:54:44 1995
diff -u --recursive --new-file v1.3.35/linux/drivers/block/README.cdu31a linux/drivers/block/README.cdu31a
@@ -1,160 +0,0 @@
- Tips for using cdu31a.c, the driver for Sony CDU-31A and CDU-33A CDROM
- drives.
-
- Corey Minyard (minyard@wf-rch.cirr.com)
-
- Colossians 3:17
-
- The Sony interface device driver handles Sony interface CDROM
- drives and provides a complete block-level interface as well as an
- ioctl() interface compatible with the Sun (as specified in
- include/linux/cdrom.h). With this interface, CDROMs can be
- accessed and standard audio CDs can be played back normally.
-
- WARNING - All autoprobes have been removed from the driver.
- You MUST configure the CDU31A via a LILO config
- at boot time or in lilo.conf. I have the
- following in my lilo.conf:
-
- append="cdu31a=0x1f88,0,PAS"
-
- The first number is the I/O base address of the
- card. The second is the interrupt (0 means none).
- The third should be "PAS" if on a Pro-Audio
- spectrum, or nothing if on something else.
-
- This interface is (unfortunately) a polled interface. This is
- because most Sony interfaces are set up with DMA and interrupts
- disables. Some (like mine) do not even have the capability to
- handle interrupts or DMA. For this reason you will see a lot of
- the following:
-
- retry_count = jiffies+ SONY_JIFFIES_TIMEOUT;
- while ((retry_count > jiffies) && (! <some condition to wait for))
- {
- while (handle_sony_cd_attention())
- ;
-
- sony_sleep();
- }
- if (the condition not met)
- {
- return an error;
- }
-
- This ugly hack waits for something to happen, sleeping a little
- between every try. it also handles attentions, which are
- asynchronous events from the drive informing the driver that a disk
- has been inserted, removed, etc.
-
- NEWS FLASH - The driver now supports interrupts but they are
- turned off by default. Use of interrupts is highly encouraged, it
- cuts CPU usage down to a reasonable level. I had DMA in for a while
- but PC DMA is just too slow. Better to just insb() it.
-
- One thing about these drives: They talk in MSF (Minute Second Frame) format.
- There are 75 frames a second, 60 seconds a minute, and up to 75 minutes on a
- disk. The funny thing is that these are sent to the drive in BCD, but the
- interface wants to see them in decimal. A lot of conversion goes on.
-
- DRIVER SPECIAL FEATURES
- -----------------------
-
- This section describes features beyond the normal audio and CD-ROM
- functions of the drive.
-
- 2048 byte buffer mode
-
- If a disk is mounted with -o block=2048, data is copied straight
- from the drive data port to the buffer. Otherwise, the readahead
- buffer must be involved to hold the other 1K of data when a 1K
- block operation is done. Note that with 2048 byte blocks you
- cannot execute files from the CD.
-
- XA compatibility
-
- The driver should support XA disks for both the CDU31A and CDU33A.
- It does this transparently, the using program doesn't need to set it.
-
- Multi-Session
-
- A multi-session disk looks just like a normal disk to the user.
- Just mount one normally, and all the data should be there.
- A special thanks to Koen for help with this!
-
- Raw sector I/O
-
- Using the CDROMREADAUDIO it is possible to read raw audio and data
- tracks. Both operations return 2352 bytes per sector. On the data
- tracks, the first 12 bytes is not returned by the drive and the value
- of that data is indeterminate.
-
-
- Copyright (C) 1993 Corey Minyard
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- /
-
-/*
-
- Setting up the Sony CDU31A/CDU33A drive interface card. If
- You have another card, you are on your own.
-
- +----------+-----------------+----------------------+
- | JP1 | 34 Pin Conn | |
- | JP2 +-----------------+ |
- | JP3 |
- | JP4 |
- | +--+
- | | +-+
- | | | | External
- | | | | Connector
- | | | |
- | | +-+
- | +--+
- | |
- | +--------+
- | |
- +------------------------------------------+
-
- JP1 sets the Base Address, using the following settings:
-
- Address Pin 1 Pin 2
- ------- ----- -----
- 0x320 Short Short
- 0x330 Short Open
- 0x340 Open Short
- 0x360 Open Open
-
- JP2 and JP3 configure the DMA channel; they must be set the same.
-
- DMA Pin 1 Pin 2 Pin 3
- --- ----- ----- -----
- 1 On Off On
- 2 Off On Off
- 3 Off Off On
-
- JP4 Configures the IRQ:
-
- IRQ Pin 1 Pin 2 Pin 3 Pin 4
- --- ----- ----- ----- -----
- 3 Off Off On Off
- 4 Off Off* Off On
- 5 On Off Off Off
- 6 Off On Off Off
-
- The documentation states to set this for interrupt
- 4, but I think that is a mistake.
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TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this