| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Registers for the ESS PCI cards |
| 3 | */ |
| 4 | |
| 5 | /* |
| 6 | * Memory access |
| 7 | */ |
| 8 | |
| 9 | #define ESS_MEM_DATA 0x00 |
| 10 | #define ESS_MEM_INDEX 0x02 |
| 11 | |
| 12 | /* |
| 13 | * AC-97 Codec port. Delay 1uS after each write. This is used to |
| 14 | * talk AC-97 (see intel.com). Write data then register. |
| 15 | */ |
| 16 | |
| 17 | #define ESS_AC97_INDEX 0x30 /* byte wide */ |
| 18 | #define ESS_AC97_DATA 0x32 |
| 19 | |
| 20 | /* |
| 21 | * Reading is a bit different. You write register|0x80 to ubdex |
| 22 | * delay 1uS poll the low bit of index, when it clears read the |
| 23 | * data value. |
| 24 | */ |
| 25 | |
| 26 | /* |
| 27 | * Control port. Not yet fully understood |
| 28 | * The value 0xC090 gets loaded to it then 0x0000 and 0x2800 |
| 29 | * to the data port. Then after 4uS the value 0x300 is written |
| 30 | */ |
| 31 | |
| 32 | #define RING_BUS_CTRL_L 0x34 |
| 33 | #define RING_BUS_CTRL_H 0x36 |
| 34 | |
| 35 | /* |
| 36 | * This is also used during setup. The value 0x17 is written to it |
| 37 | */ |
| 38 | |
| 39 | #define ESS_SETUP_18 0x18 |
| 40 | |
| 41 | /* |
| 42 | * And this one gets 0x000b |
| 43 | */ |
| 44 | |
| 45 | #define ESS_SETUP_A2 0xA2 |
| 46 | |
| 47 | /* |
| 48 | * And this 0x0000 |
| 49 | */ |
| 50 | |
| 51 | #define ESS_SETUP_A4 0xA4 |
| 52 | #define ESS_SETUP_A6 0xA6 |
| 53 | |
| 54 | /* |
| 55 | * Stuff to do with Harpo - the wave stuff |
| 56 | */ |
| 57 | |
| 58 | #define ESS_WAVETABLE_SIZE 0x14 |
| 59 | #define ESS_WAVETABLE_2M 0xA180 |
| 60 | |