board/atmel/common/board.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Microchip
   4  *                    Wenyou Yang <wenyou.yang@microchip.com>
   5  */
   6
   7 #include <common.h>
   8 #include <env.h>
   9 #include <w1.h>
  10 #include <w1-eeprom.h>
  11 #include <dm/device-internal.h>
  12
  13 #define AT91_PDA_EEPROM_ID_OFFSET               15
  14 #define AT91_PDA_EEPROM_ID_LENGTH               5
  15 #define AT91_PDA_EEPROM_DEFAULT_BUS             0
  16
  17 char *get_cpu_name(void);
  18
  19 void dummy(void)
  20 {
  21 }
  22
  23 #if defined CONFIG_W1
  24 void at91_pda_detect(void)
  25 {
  26         struct udevice *bus, *dev;
  27         u8 buf[AT91_PDA_EEPROM_ID_LENGTH + 1] = {0};
  28         int ret;
  29         int pda = 0;
  30
  31         ret = w1_get_bus(AT91_PDA_EEPROM_DEFAULT_BUS, &bus);
  32         if (ret)
  33                 goto pda_detect_err;
  34
  35         for (device_find_first_child(bus, &dev);
  36              dev;
  37              device_find_next_child(&dev)) {
  38                 ret = device_probe(dev);
  39                 if (ret) {
  40                         continue;
  41                 } else {
  42                         ret = w1_eeprom_read_buf(dev, AT91_PDA_EEPROM_ID_OFFSET,
  43                                                  (u8 *)buf, AT91_PDA_EEPROM_ID_LENGTH);
  44                         if (ret)
  45                                 goto pda_detect_err;
  46                         break;
  47                 }
  48         }
  49         pda = simple_strtoul((const char *)buf, NULL, 10);
  50
  51         switch (pda) {
  52         case 7000:
  53                 if (buf[4] == 'B')
  54                         printf("PDA TM7000B detected\n");
  55                 else
  56                         printf("PDA TM7000 detected\n");
  57                 break;
  58         case 4300:
  59                 printf("PDA TM4300 detected\n");
  60                 break;
  61         case 5000:
  62                 printf("PDA TM5000 detected\n");
  63                 break;
  64         }
  65
  66 pda_detect_err:
  67         env_set("pda", (const char *)buf);
  68 }
  69 #else
  70 void at91_pda_detect(void)
  71 {
  72 }
  73 #endif
  74
  75 void at91_prepare_cpu_var(void)
  76 {
  77         env_set("cpu", get_cpu_name());
  78 }