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/*
* 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
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