board.c 1.4 KB

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