hwrev.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd.
  4. * (http://www.friendlyarm.com)
  5. */
  6. #include <config.h>
  7. #include <common.h>
  8. #include <i2c.h>
  9. #include <asm/io.h>
  10. #include <asm/arch/nexell.h>
  11. #include <asm/arch/nx_gpio.h>
  12. /* Board revision list: <PCB3 | PCB2 | PCB1>
  13. * 0b000 - NanoPi 2
  14. * 0b001 - NanoPC-T2
  15. * 0b010 - NanoPi S2
  16. * 0b011 - Smart4418
  17. * 0b100 - NanoPi Fire 2A
  18. * 0b111 - NanoPi M2A
  19. *
  20. * Extented revision:
  21. * 0b001 - Smart4418-SDK
  22. */
  23. #define __IO_GRP 2 /* GPIO_C */
  24. #define __IO_PCB1 26
  25. #define __IO_PCB2 27
  26. #define __IO_PCB3 25
  27. static int pcb_rev = -1;
  28. static int base_rev;
  29. static void bd_hwrev_config_gpio(void)
  30. {
  31. int gpios[3][2] = {
  32. { __IO_PCB1, 1 },
  33. { __IO_PCB2, 1 },
  34. { __IO_PCB3, 1 },
  35. };
  36. int i;
  37. /* gpio input mode, pull-down */
  38. for (i = 0; i < 3; i++) {
  39. nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]);
  40. nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0);
  41. nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0);
  42. }
  43. }
  44. void bd_hwrev_init(void)
  45. {
  46. if (pcb_rev >= 0)
  47. return;
  48. bd_hwrev_config_gpio();
  49. pcb_rev = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1);
  50. pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1;
  51. pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2;
  52. }
  53. /* Get extended revision for SmartXX18 */
  54. void bd_base_rev_init(void)
  55. {
  56. struct udevice *dev;
  57. u8 val = 0;
  58. if (pcb_rev != 0x3)
  59. return;
  60. #define PCA9536_I2C_BUS 2
  61. #define PCA9636_I2C_ADDR 0x41
  62. if (i2c_get_chip_for_busnum
  63. (PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev))
  64. return;
  65. if (!dm_i2c_read(dev, 0, &val, 1))
  66. base_rev = (val & 0xf);
  67. }
  68. /* To override __weak symbols */
  69. u32 get_board_rev(void)
  70. {
  71. return (base_rev << 8) | pcb_rev;
  72. }
  73. const char *get_board_name(void)
  74. {
  75. bd_hwrev_init();
  76. switch (pcb_rev) {
  77. case 0:
  78. return "NanoPi 2";
  79. case 1:
  80. return "NanoPC-T2";
  81. case 2:
  82. return "NanoPi S2";
  83. case 3:
  84. return "Smart4418";
  85. case 4:
  86. return "NanoPi Fire 2A";
  87. case 7:
  88. return "NanoPi M2A";
  89. default:
  90. return "s5p4418-X";
  91. }
  92. }