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/* SPDX-License-Identifier: GPL-2.0-only */
#include <bootblock_common.h>
#include <console/console.h>
#include <delay.h>
#include <gpio.h>
#include "include/ec.h"
#include "include/gpio.h"
#define ADC_3V_10BIT_GRANULARITY_MAX (3005 / 1023)
#define PCB_VER_AD 1
#define MODEL_ID_AD 3
#define DGPU_PRESENT GPP_A20 /* Active low */
#define DGPU_HOLD_RST GPP_B4 /* Active low */
#define DGPU_PWR_EN GPP_B21 /* Active low */
/* TODO/NB: Detection is still unreliable. Is a wait required? */
static void board_detect(void)
{
printk(BIOS_DEBUG, "Mainboard: Detecting board SKU\n");
uint16_t data_buffer = read_ec_adc_converter(MODEL_ID_AD);
printk(BIOS_DEBUG, "BoardId (raw) = 0x%x\n", data_buffer);
printk(BIOS_DEBUG, "BoardId: ");
/* Board by max millivoltage range (of 10-bit, 3.005 V ADC) */
if (data_buffer <= (1374 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_ERR, "Reserved?\n");
} else if (data_buffer <= (2017 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_DEBUG, "Aspire VN7-792G (Newgate-SLS_dGPU)\n");
printk(BIOS_CRIT, "WARNING: This board is unsupported!\n");
printk(BIOS_CRIT, "Damage may result from programming incorrect GPIO table!\n");
} else if (data_buffer <= (2259 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_DEBUG, "Aspire VN7-592G (Rayleigh-SLS_960M)\n");
printk(BIOS_CRIT, "WARNING: This board is unsupported!\n");
printk(BIOS_CRIT, "Damage may result from programming incorrect GPIO table!\n");
} else {
printk(BIOS_DEBUG, "Aspire VN7-572G (Rayleigh-SL_dGPU)\n");
}
data_buffer = read_ec_adc_converter(PCB_VER_AD);
printk(BIOS_DEBUG, "PCB version (raw) = 0x%x\n", data_buffer);
printk(BIOS_DEBUG, "PCB version: ");
/* PCB by max millivoltage range (of 10-bit, 3.005 V ADC) */
if (data_buffer <= (2017 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_ERR, "Reserved?\n");
} else if (data_buffer <= (2259 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_DEBUG, "-1\n");
} else if (data_buffer <= (2493 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_DEBUG, "SC\n");
} else if (data_buffer <= (2759 / ADC_3V_10BIT_GRANULARITY_MAX)) {
printk(BIOS_DEBUG, "SB\n");
} else {
printk(BIOS_DEBUG, "SA\n");
}
}
static void dgpu_power_on(void)
{
if (!gpio_get(DGPU_PRESENT)) {
printk(BIOS_DEBUG, "dGPU present, enable power...\n");
gpio_set(DGPU_HOLD_RST, 0); // Assert dGPU_HOLD_RST#
mdelay(2);
gpio_set(DGPU_PWR_EN, 0); // Assert dGPU_PWR_EN#
mdelay(7);
gpio_set(DGPU_HOLD_RST, 1); // Deassert dGPU_HOLD_RST#
mdelay(30);
} else {
printk(BIOS_DEBUG, "dGPU not present, disable power...\n");
gpio_set(DGPU_HOLD_RST, 0); // Assert dGPU_HOLD_RST#
gpio_set(DGPU_PWR_EN, 1); // Deassert dGPU_PWR_EN#
}
}
void bootblock_mainboard_init(void)
{
/* NB: Relocated from _early_init() so that debug logging works.
* However, if we use this to ensure that the user flashed the correct
* (future) variant, this must occur before any GPIOs are programmed.
*/
board_detect();
dgpu_power_on();
}
void bootblock_mainboard_early_init(void)
{
mainboard_config_stage_gpios();
}
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