board/gth/ee_dev.h

   1 /* By Thomas.Lange@Corelatus.com 001025
   2    $Revision: 1.6 $
   3
   4    Definitions for EEPROM/VOLT METER  DS2438
   5    Copyright (C) 2000-2001 Corelatus AB */
   6
   7 #ifndef INCeedevh
   8 #define INCeedevh
   9
  10 #define E_DEBUG(fmt,args...) if( Debug ) printk(KERN_DEBUG"EE: " fmt, ##args)
  11
  12 #define PORT_B_PAR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbpar
  13 #define PORT_B_ODR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbodr
  14 #define PORT_B_DIR ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdir
  15 #define PORT_B_DAT ((volatile immap_t *)CFG_IMMR)->im_cpm.cp_pbdat
  16
  17 #define SET_PORT_B_INPUT(Mask)  PORT_B_DIR &= ~(Mask)
  18 #define SET_PORT_B_OUTPUT(Mask) PORT_B_DIR |= Mask
  19
  20 #define WRITE_PORT_B(Mask,Value) { \
  21                         if (Value) PORT_B_DAT |= Mask; \
  22                         else PORT_B_DAT &= ~(Mask); \
  23                 }
  24 #define WRITE_PORT(Value) WRITE_PORT_B(PB_EEPROM,Value)
  25
  26 #define READ_PORT (PORT_B_DAT&PB_EEPROM)
  27
  28 /* 64 bytes chip */
  29 #define EE_CHIP_SIZE 64
  30
  31 /* We use this resistor for measuring the current drain on 3.3V */
  32 #define CURRENT_RESISTOR 0.022
  33
  34 /* microsecs
  35    Pull line down at least this long for reset pulse */
  36 #define RESET_LOW_TIME    490
  37
  38 /* Read presence pulse after we release reset pulse */
  39 #define PRESENCE_TIMEOUT  100
  40 #define PRESENCE_LOW_TIME 200
  41
  42 #define WRITE_0_LOW 80
  43 #define WRITE_1_LOW 2
  44 #define TOTAL_WRITE_LOW 80
  45
  46 #define READ_LOW        2
  47 #define READ_TIMEOUT   10
  48 #define TOTAL_READ_LOW 80
  49
  50 /*** Rom function commands ***/
  51 #define READ_ROM   0x33
  52 #define MATCH_ROM  0x55
  53 #define SKIP_ROM   0xCC
  54 #define SEARCH_ROM 0xF0
  55
  56
  57 /*** Memory_command_function ***/
  58 #define WRITE_SCRATCHPAD 0x4E
  59 #define READ_SCRATCHPAD  0xBE
  60 #define COPY_SCRATCHPAD  0x48
  61 #define RECALL_MEMORY    0xB8
  62 #define CONVERT_TEMP     0x44
  63 #define CONVERT_VOLTAGE  0xB4
  64
  65 /* Chip is divided in 8 pages, 8 bytes each */
  66
  67 #define EE_PAGE_SIZE 8
  68
  69 /* All chip data we want are in page 0 */
  70
  71 /* Bytes in page 0 */
  72 #define EE_P0_STATUS   0
  73 #define EE_P0_TEMP_LSB 1
  74 #define EE_P0_TEMP_MSB 2
  75 #define EE_P0_VOLT_LSB 3
  76 #define EE_P0_VOLT_MSB 4
  77 #define EE_P0_CURRENT_LSB 5
  78 #define EE_P0_CURRENT_MSB 6
  79
  80
  81 /* 40 byte user data is located at page 3-7 */
  82 #define EE_USER_PAGE_0 3
  83 #define USER_PAGES 5
  84
  85 #endif /* INCeedevh */