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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 21:24:00 +08:00
linux-next/sound/oss/maestro.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

61 lines
1.1 KiB
C

/*
* Registers for the ESS PCI cards
*/
/*
* Memory access
*/
#define ESS_MEM_DATA 0x00
#define ESS_MEM_INDEX 0x02
/*
* AC-97 Codec port. Delay 1uS after each write. This is used to
* talk AC-97 (see intel.com). Write data then register.
*/
#define ESS_AC97_INDEX 0x30 /* byte wide */
#define ESS_AC97_DATA 0x32
/*
* Reading is a bit different. You write register|0x80 to ubdex
* delay 1uS poll the low bit of index, when it clears read the
* data value.
*/
/*
* Control port. Not yet fully understood
* The value 0xC090 gets loaded to it then 0x0000 and 0x2800
* to the data port. Then after 4uS the value 0x300 is written
*/
#define RING_BUS_CTRL_L 0x34
#define RING_BUS_CTRL_H 0x36
/*
* This is also used during setup. The value 0x17 is written to it
*/
#define ESS_SETUP_18 0x18
/*
* And this one gets 0x000b
*/
#define ESS_SETUP_A2 0xA2
/*
* And this 0x0000
*/
#define ESS_SETUP_A4 0xA4
#define ESS_SETUP_A6 0xA6
/*
* Stuff to do with Harpo - the wave stuff
*/
#define ESS_WAVETABLE_SIZE 0x14
#define ESS_WAVETABLE_2M 0xA180