drivers/sound/maestro.h

   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