src/mainboard/acer/aspire_vn7_572g/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <console/console.h>
   5 #include <delay.h>
   6 #include <gpio.h>
   7 #include "include/ec.h"
   8 #include "include/gpio.h"
   9
  10 #define ADC_3V_10BIT_GRANULARITY_MAX    (3005 / 1023)
  11 #define PCB_VER_AD                      1
  12 #define MODEL_ID_AD                     3
  13
  14 #define DGPU_PRESENT    GPP_A20 /* Active low */
  15 #define DGPU_HOLD_RST   GPP_B4  /* Active low */
  16 #define DGPU_PWR_EN     GPP_B21 /* Active low */
  17
  18 /* TODO/NB: Detection is still unreliable. Is a wait required? */
  19 static void board_detect(void)
  20 {
  21         printk(BIOS_DEBUG, "Mainboard: Detecting board SKU\n");
  22
  23         uint16_t data_buffer = read_ec_adc_converter(MODEL_ID_AD);
  24         printk(BIOS_DEBUG, "BoardId (raw) = 0x%x\n", data_buffer);
  25         printk(BIOS_DEBUG, "BoardId: ");
  26         /* Board by max millivoltage range (of 10-bit, 3.005 V ADC) */
  27         if (data_buffer <= (1374 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  28                 printk(BIOS_ERR, "Reserved?\n");
  29         } else if (data_buffer <= (2017 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  30                 printk(BIOS_DEBUG, "Aspire VN7-792G (Newgate-SLS_dGPU)\n");
  31                 printk(BIOS_CRIT, "WARNING: This board is unsupported!\n");
  32                 printk(BIOS_CRIT, "Damage may result from programming incorrect GPIO table!\n");
  33         } else if (data_buffer <= (2259 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  34                 printk(BIOS_DEBUG, "Aspire VN7-592G (Rayleigh-SLS_960M)\n");
  35                 printk(BIOS_CRIT, "WARNING: This board is unsupported!\n");
  36                 printk(BIOS_CRIT, "Damage may result from programming incorrect GPIO table!\n");
  37         } else {
  38                 printk(BIOS_DEBUG, "Aspire VN7-572G (Rayleigh-SL_dGPU)\n");
  39         }
  40
  41         data_buffer = read_ec_adc_converter(PCB_VER_AD);
  42         printk(BIOS_DEBUG, "PCB version (raw) = 0x%x\n", data_buffer);
  43         printk(BIOS_DEBUG, "PCB version: ");
  44         /* PCB by max millivoltage range (of 10-bit, 3.005 V ADC) */
  45         if (data_buffer <= (2017 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  46                 printk(BIOS_ERR, "Reserved?\n");
  47         } else if (data_buffer <= (2259 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  48                 printk(BIOS_DEBUG, "-1\n");
  49         } else if (data_buffer <= (2493 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  50                 printk(BIOS_DEBUG, "SC\n");
  51         } else if (data_buffer <= (2759 / ADC_3V_10BIT_GRANULARITY_MAX)) {
  52                 printk(BIOS_DEBUG, "SB\n");
  53         } else {
  54                 printk(BIOS_DEBUG, "SA\n");
  55         }
  56 }
  57
  58 static void dgpu_power_on(void)
  59 {
  60         if (!gpio_get(DGPU_PRESENT)) {
  61                 printk(BIOS_DEBUG, "dGPU present, enable power...\n");
  62                 gpio_set(DGPU_HOLD_RST, 0);     // Assert dGPU_HOLD_RST#
  63                 mdelay(2);
  64                 gpio_set(DGPU_PWR_EN, 0);       // Assert dGPU_PWR_EN#
  65                 mdelay(7);
  66                 gpio_set(DGPU_HOLD_RST, 1);     // Deassert dGPU_HOLD_RST#
  67                 mdelay(30);
  68         } else {
  69                 printk(BIOS_DEBUG, "dGPU not present, disable power...\n");
  70                 gpio_set(DGPU_HOLD_RST, 0);     // Assert dGPU_HOLD_RST#
  71                 gpio_set(DGPU_PWR_EN, 1);       // Deassert dGPU_PWR_EN#
  72         }
  73 }
  74
  75 void bootblock_mainboard_init(void)
  76 {
  77         /* NB: Relocated from _early_init() so that debug logging works.
  78          * However, if we use this to ensure that the user flashed the correct
  79          * (future) variant, this must occur before any GPIOs are programmed.
  80          */
  81         board_detect();
  82         dgpu_power_on();
  83 }
  84
  85 void bootblock_mainboard_early_init(void)
  86 {
  87         mainboard_config_stage_gpios();
  88 }