mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <types.h>
#include <device/device.h>
#include <device/pci_def.h>
#include <console/console.h>
#if CONFIG(VGA_ROM_RUN)
#include <x86emu/x86emu.h>
#endif
#include <option.h>
#include <arch/interrupt.h>
#include <southbridge/intel/bd82x6x/pch.h>
 
#if CONFIG(VGA_ROM_RUN)
static int int15_handler(void)
{
        int res = 0;
 
        printk(BIOS_DEBUG, "%s: AX=%04x BX=%04x CX=%04x DX=%04x\n",
                          __func__, X86_AX, X86_BX, X86_CX, X86_DX);
 
        switch (X86_EAX & 0xffff) {
        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_EAX &= 0xffff0000;
                X86_EAX |= 0x005f;
                X86_ECX &= 0xffffff00;
                X86_ECX |= 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_EAX &= 0xffff0000;
                X86_EAX |= 0x005f;
                X86_ECX &= 0xffff0000;
                X86_ECX |= 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 = SDVO-LVDS, LFP driven by SDVO decoder
                 *  03h = eDP, LFP Driven by Int-DisplayPort encoder
                 */
                X86_EAX &= 0xffff0000;
                X86_EAX |= 0x005f;
                X86_ECX &= 0xffff0000;
                X86_ECX |= 0x0000; /* TODO: Make this configurable in NVRAM? */
                res = 1;
                break;
        case 0x5f40:
                /*
                 * Boot Panel Type Hook:
                 *  BL(in): 00h = LFP, 01h = LFP2
                 *  CL(out): panel type id in table: 1..16
                 */
                if (0 == (X86_EBX & 0xff)) {
                        X86_EAX &= 0xffff0000;
                        X86_EAX |= 0x015f;
                        res = 1;
                } else if (1 == (X86_EBX & 0xff)) {
                        X86_EAX &= 0xffff0000;
                        X86_EAX |= 0x015f;
                        res = 1;
                } else {
                        printk(BIOS_DEBUG,
                               "Unknown panel index %u "
                               "in INT15 function %04x!\n",
                               X86_EBX & 0xff, X86_EAX & 0xffff);
                }
                break;
        case 0x5f52:
                /*
                 * Panel Color Depth:
                 *  00h = 18 bit
                 *  01h = 24 bit
                 */
                X86_EAX &= 0xffff0000;
                X86_EAX |= 0x005f;
                X86_ECX &= 0xffff0000;
                X86_ECX |= 0x0001;
                res = 1;
                break;
        case 0x5f14:
                if ((X86_EBX & 0xffff) == 0x78f) {
                        /*
                         * Get Miscellaneous Status Hook:
                         *  bit 2: AC power active?
                         *  bit 1: lid closed?
                         *  bit 0: docked?
                         */
                        X86_EAX &= 0xffff0000;
                        X86_EAX |= 0x015f;
                        res = 1;
                } else {
                        printk(BIOS_DEBUG,
                               "Unknown BX 0x%04x in INT15 function %04x!\n",
                               X86_EBX & 0xffff, X86_EAX & 0xffff);
                }
                break;
        case 0x5f49:
                /*
                 * Get Inverter Type and Polarity:
                 *  EBX: backlight control brightness: 0..255
                 *  ECX:
                 *   0 = Enable PWM inverted, 2 = Enable PWM
                 *   1 = Enable I2C inverted, 3 = Enable I2C
                 */
                X86_EAX &= 0xffff0000;
                X86_EAX |= 0x015f;
                res = 1;
                break;
        default:
                printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
                       X86_EAX & 0xffff);
                break;
        }
        return res;
}
#endif
 
 
 
/* mainboard_enable is executed as first thing after */
/* enumerate_buses(). */
 
static void mainboard_enable(struct device *dev)
{
#if CONFIG(PCI_OPTION_ROM_RUN_YABEL) || \
        CONFIG(PCI_OPTION_ROM_RUN_REALMODE)
        /* Install custom int15 handler for VGA OPROM */
        mainboard_interrupt_handlers(0x15, &int15_handler);
#endif
        unsigned int disable = get_uint_option("ethernet1", 0);
        if (disable) {
                struct device *nic = pcidev_on_root(0x1c, 2);
                if (nic) {
                        printk(BIOS_DEBUG, "DISABLE FIRST NIC!\n");
                        nic->enabled = 0;
                }
        }
        disable = get_uint_option("ethernet2", 0);
        if (disable) {
                struct device *nic = pcidev_on_root(0x1c, 3);
                if (nic) {
                        printk(BIOS_DEBUG, "DISABLE SECOND NIC!\n");
                        nic->enabled = 0;
                }
        }
}
 
struct chip_operations mainboard_ops = {
        .enable_dev = mainboard_enable,
};