| /* |
| * 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 |
| |
