mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <types.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include <console/console.h>
#if CONFIG(VGA_ROM_RUN)
#include <x86emu/x86emu.h>
#endif
#include <arch/io.h>
#include <arch/interrupt.h>
#include "onboard.h"
#include "ec.h"
#include <southbridge/intel/bd82x6x/pch.h>
#include <southbridge/intel/common/gpio.h>
#include <smbios.h>
#include <ec/google/chromeec/ec.h>
 
#if CONFIG(VGA_ROM_RUN)
static int int15_handler(void)
{
        int res = 0;
 
        printk(BIOS_DEBUG, "%s: INT15 function %04x!\n",
                        __func__, X86_AX);
 
        switch (X86_AX) {
        case 0x5f34:
                /*
                 * Set Panel Fitting Hook:
                 *  bit 2 = Graphics Stretching
                 *  bit 1 = Text Stretching
                 *  bit 0 = Centering (do not set with bit1 or bit2)
                 *  0     = video BIOS default
                 */
                X86_AX = 0x005f;
                X86_CL = 0x00; /* Use video BIOS default */
                res = 1;
                break;
        case 0x5f35:
                /*
                 * Boot Display Device Hook:
                 *  bit 0 = CRT
                 *  bit 1 = TV (eDP)
                 *  bit 2 = EFP
                 *  bit 3 = LFP
                 *  bit 4 = CRT2
                 *  bit 5 = TV2 (eDP)
                 *  bit 6 = EFP2
                 *  bit 7 = LFP2
                 */
                X86_AX = 0x005f;
                X86_CX = 0x0000; /* Use video BIOS default */
                res = 1;
                break;
        case 0x5f51:
                /*
                 * Hook to select active LFP configuration:
                 *  00h = No LVDS, VBIOS does not enable LVDS
                 *  01h = Int-LVDS, LFP driven by integrated LVDS decoder
                 *  02h = SVDO-LVDS, LFP driven by SVDO decoder
                 *  03h = eDP, LFP Driven by Int-DisplayPort encoder
                 */
                X86_AX = 0x005f;
                X86_CX = 0x0003; /* eDP */
                res = 1;
                break;
        case 0x5f70:
                switch (X86_CH) {
                case 0:
                        /* Get Mux */
                        X86_AX = 0x005f;
                        X86_CX = 0x0000;
                        res = 1;
                        break;
                case 1:
                        /* Set Mux */
                        X86_AX = 0x005f;
                        X86_CX = 0x0000;
                        res = 1;
                        break;
                case 2:
                        /* Get SG/Non-SG mode */
                        X86_AX = 0x005f;
                        X86_CX = 0x0000;
                        res = 1;
                        break;
                default:
                        /* Interrupt was not handled */
                        printk(BIOS_DEBUG, "Unknown INT15 5f70 function: 0x%02x\n",
                                X86_CH);
                        break;
                }
                break;
        case 0x5fac:
                res = 1;
                break;
        default:
                printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n", X86_AX);
                break;
        }
        return res;
}
#endif
 
static void mainboard_init(struct device *dev)
{
        uint32_t board_version = 0;
 
        /* Initialize the Embedded Controller */
        link_ec_init();
 
        google_chromeec_get_board_version(&board_version);
        if (board_version == 0) {
                /* If running on proto1 - enable reversion of gpio11. */
                u32 gpio_inv;
                u16 gpio_base = pci_read_config16
                        (pcidev_on_root(0x1f, 0), GPIO_BASE) &
                        0xfffc;
                u16 gpio_inv_addr = gpio_base + GPI_INV;
                gpio_inv = inl(gpio_inv_addr);
                outl(gpio_inv | (1 << 11), gpio_inv_addr);
        }
}
 
static int link_onboard_smbios_data(struct device *dev, int *handle,
                                     unsigned long *current)
{
        int len = 0;
 
        len += smbios_write_type41(
                current, handle,
                BOARD_LIGHTSENSOR_NAME,         /* name */
                BOARD_LIGHTSENSOR_IRQ,          /* instance */
                0,                              /* segment */
                BOARD_LIGHTSENSOR_I2C_ADDR,     /* bus */
                0,                              /* device */
                0,                              /* function */
                SMBIOS_DEVICE_TYPE_OTHER);      /* device type */
 
        len += smbios_write_type41(
                current, handle,
                BOARD_TRACKPAD_NAME,            /* name */
                BOARD_TRACKPAD_IRQ,             /* instance */
                0,                              /* segment */
                BOARD_TRACKPAD_I2C_ADDR,        /* bus */
                0,                              /* device */
                0,                              /* function */
                SMBIOS_DEVICE_TYPE_OTHER);      /* device type */
 
        len += smbios_write_type41(
                current, handle,
                BOARD_TOUCHSCREEN_NAME,         /* name */
                BOARD_TOUCHSCREEN_IRQ,          /* instance */
                0,                              /* segment */
                BOARD_TOUCHSCREEN_I2C_ADDR,     /* bus */
                0,                              /* device */
                0,                              /* function */
                SMBIOS_DEVICE_TYPE_OTHER);      /* device type */
 
        return len;
}
 
// mainboard_enable is executed as first thing after
// enumerate_buses().
 
static void mainboard_enable(struct device *dev)
{
        dev->ops->init = mainboard_init;
        dev->ops->get_smbios_data = link_onboard_smbios_data;
#if CONFIG(VGA_ROM_RUN)
        /* Install custom int15 handler for VGA OPROM */
        mainboard_interrupt_handlers(0x15, &int15_handler);
#endif
}
 
struct chip_operations mainboard_ops = {
        .enable_dev = mainboard_enable,
};