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asb100

asb100 2.0 KB
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  1. Kernel driver asb100
    2. 

  2. ====================
    3. 

  3. 

  4. Supported Chips:
    5. 

  5.   * Asus ASB100 and ASB100-A "Bach"
    6. 

  6.     Prefix: 'asb100'
    7. 

  7.     Addresses scanned: I2C 0x2d
    8. 

  8.     Datasheet: none released
    9. 

  9. 

  10. Author: Mark M. Hoffman <mhoffman@lightlink.com>
    11. 

  11. 

  12. Description
    13. 

  13. -----------
    14. 

  14. 

  15. This driver implements support for the Asus ASB100 and ASB100-A "Bach".
    16. 

  16. These are custom ASICs available only on Asus mainboards. Asus refuses to
    17. 

  17. supply a datasheet for these chips. Thanks go to many people who helped
    18. 

  18. investigate their hardware, including:
    19. 

  19. 

  20. Vitaly V. Bursov
    21. 

  21. Alexander van Kaam (author of MBM for Windows)
    22. 

  22. Bertrik Sikken
    23. 

  23. 

  24. The ASB100 implements seven voltage sensors, three fan rotation speed
    25. 

  25. sensors, four temperature sensors, VID lines and alarms. In addition to
    26. 

  26. these, the ASB100-A also implements a single PWM controller for fans 2 and
    27. 

  27. 3 (i.e. one setting controls both.) If you have a plain ASB100, the PWM
    28. 

  28. controller will simply not work (or maybe it will for you... it doesn't for
    29. 

  29. me).
    30. 

  30. 

  31. Temperatures are measured and reported in degrees Celsius.
    32. 

  32. 

  33. Fan speeds are reported in RPM (rotations per minute). An alarm is
    34. 

  34. triggered if the rotation speed has dropped below a programmable limit.
    35. 

  35. 

  36. Voltage sensors (also known as IN sensors) report values in volts.
    37. 

  37. 

  38. The VID lines encode the core voltage value: the voltage level your
    39. 

  39. processor should work with. This is hardcoded by the mainboard and/or
    40. 

  40. processor itself. It is a value in volts.
    41. 

  41. 

  42. Alarms: (TODO question marks indicate may or may not work)
    43. 

  43. 

  44. 0x0001 => in0 (?)
    45. 

  45. 0x0002 => in1 (?)
    46. 

  46. 0x0004 => in2
    47. 

  47. 0x0008 => in3
    48. 

  48. 0x0010 => temp1 (1)
    49. 

  49. 0x0020 => temp2
    50. 

  50. 0x0040 => fan1
    51. 

  51. 0x0080 => fan2
    52. 

  52. 0x0100 => in4
    53. 

  53. 0x0200 => in5 (?) (2)
    54. 

  54. 0x0400 => in6 (?) (2)
    55. 

  55. 0x0800 => fan3
    56. 

  56. 0x1000 => chassis switch
    57. 

  57. 0x2000 => temp3
    58. 

  58. 

  59. Alarm Notes:
    60. 

  60. 

  61. (1) This alarm will only trigger if the hysteresis value is 127C.
    62. 

  62. I.e. it behaves the same as w83781d.
    63. 

  63. 

  64. (2) The min and max registers for these values appear to
    65. 

  65. be read-only or otherwise stuck at 0x00.
    66. 

  66. 

  67. TODO:
    68. 

  68. * Experiment with fan divisors > 8.
    69. 

  69. * Experiment with temp. sensor types.
    70. 

  70. * Are there really 13 voltage inputs? Probably not...
    71. 

  71. * Cleanups, no doubt...
    72. 

  72.