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  }