61 lines
1.1 KiB
C
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
|
|
|