boardid.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <boardid.h>
#include <gpio.h>
#include <types.h>
 
uint32_t board_id(void)
{
        static uint32_t id = UNDEFINED_STRAPPING_ID;
 
        const gpio_t pins[] = {[2] = GPIO(31), [1] = GPIO(93), [0] = GPIO(33)};
 
        if (id == UNDEFINED_STRAPPING_ID)
                id = gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
 
        return id;
}
 
/* Some boards/revisions use one GPIO mapping and others use another. There's no real rhyme or
   reason to it. Don't try to think about it too much... */
static bool use_old_pins(void)
{
        return ((CONFIG(BOARD_GOOGLE_TROGDOR) && board_id() < 2) ||
                CONFIG(BOARD_GOOGLE_LAZOR) ||
                (CONFIG(BOARD_GOOGLE_POMPOM) && board_id() < 1));
}
 
uint32_t ram_code(void)
{
        static uint32_t id = UNDEFINED_STRAPPING_ID;
 
        const gpio_t old_pins[] = {[2] = GPIO(13), [1] = GPIO(19), [0] = GPIO(29)};
        const gpio_t pins[] = {[2] = GPIO(5), [1] = GPIO(3), [0] = GPIO(1)};
 
        if (id == UNDEFINED_STRAPPING_ID) {
                if (use_old_pins())
                        id = gpio_base2_value(old_pins, ARRAY_SIZE(old_pins));
                else
                        id = gpio_base2_value(pins, ARRAY_SIZE(pins));
        }
 
        return id;
}
 
static uint8_t panel_id(void)
{
        const gpio_t pins[] = {[1] = GPIO(11), [0] = GPIO(4)};
 
        return gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
}
 
uint32_t sku_id(void)
{
        static uint32_t id = UNDEFINED_STRAPPING_ID;
 
        const gpio_t old_pins[] = {[2] = GPIO(20), [1] = GPIO(90), [0] = GPIO(105)};
        const gpio_t pins[] = {[2] = GPIO(2), [1] = GPIO(90), [0] = GPIO(58)};
 
        if (id == UNDEFINED_STRAPPING_ID) {
                if (use_old_pins())
                        id = gpio_binary_first_base3_value(old_pins, ARRAY_SIZE(old_pins));
                else
                        id = gpio_binary_first_base3_value(pins, ARRAY_SIZE(pins));
 
                if (CONFIG(TROGDOR_HAS_MIPI_PANEL))
                        id = panel_id() << 8 | id;
        }
 
        return id;
}