src/mainboard/google/trogdor/boardid.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boardid.h>
   4 #include <gpio.h>
   5 #include <types.h>
   6
   7 uint32_t board_id(void)
   8 {
   9         static uint32_t id = UNDEFINED_STRAPPING_ID;
  10
  11         const gpio_t pins[] = {[2] = GPIO(31), [1] = GPIO(93), [0] = GPIO(33)};
  12
  13         if (id == UNDEFINED_STRAPPING_ID)
  14                 id = gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
  15
  16         return id;
  17 }
  18
  19 /* Some boards/revisions use one GPIO mapping and others use another. There's no real rhyme or
  20    reason to it. Don't try to think about it too much... */
  21 static bool use_old_pins(void)
  22 {
  23         return ((CONFIG(BOARD_GOOGLE_TROGDOR) && board_id() < 2) ||
  24                 CONFIG(BOARD_GOOGLE_LAZOR) ||
  25                 (CONFIG(BOARD_GOOGLE_POMPOM) && board_id() < 1));
  26 }
  27
  28 uint32_t ram_code(void)
  29 {
  30         static uint32_t id = UNDEFINED_STRAPPING_ID;
  31
  32         const gpio_t old_pins[] = {[2] = GPIO(13), [1] = GPIO(19), [0] = GPIO(29)};
  33         const gpio_t pins[] = {[2] = GPIO(5), [1] = GPIO(3), [0] = GPIO(1)};
  34
  35         if (id == UNDEFINED_STRAPPING_ID) {
  36                 if (use_old_pins())
  37                         id = gpio_base2_value(old_pins, ARRAY_SIZE(old_pins));
  38                 else
  39                         id = gpio_base2_value(pins, ARRAY_SIZE(pins));
  40         }
  41
  42         return id;
  43 }
  44
  45 static uint8_t panel_id(void)
  46 {
  47         const gpio_t pins[] = {[1] = GPIO(11), [0] = GPIO(4)};
  48
  49         return gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
  50 }
  51
  52 uint32_t sku_id(void)
  53 {
  54         static uint32_t id = UNDEFINED_STRAPPING_ID;
  55
  56         const gpio_t old_pins[] = {[2] = GPIO(20), [1] = GPIO(90), [0] = GPIO(105)};
  57         const gpio_t pins[] = {[2] = GPIO(2), [1] = GPIO(90), [0] = GPIO(58)};
  58
  59         if (id == UNDEFINED_STRAPPING_ID) {
  60                 if (use_old_pins())
  61                         id = gpio_binary_first_base3_value(old_pins, ARRAY_SIZE(old_pins));
  62                 else
  63                         id = gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
  64
  65                 if (CONFIG(TROGDOR_HAS_MIPI_PANEL))
  66                         id = panel_id() << 8 | id;
  67         }
  68
  69         return id;
  70 }