mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <console/console.h>
#include <drivers/intel/gma/int15.h>
#include <ec/acpi/ec.h>
#include <southbridge/intel/common/gpio.h>
#include <string.h>
#include <smbios.h>
#include "ec.h"
 
#include <acpi/acpi.h>
 
static u8 mainboard_fill_ec_version(char *buf, u8 buf_len)
{
        u8 i, c;
        char str[16 + 1]; /* 16 ASCII chars + \0 */
 
        /* Build ID */
        for (i = 0; i < 8; i++) {
                c = ec_mm_read(0xf0 + i);
                if (c < 0x20 || c > 0x7f) {
                        i = snprintf(str, sizeof(str), "*INVALID");
                        break;
                }
                str[i] = c;
        }
 
        i = MIN(buf_len, i);
        memcpy(buf, str, i);
 
        return i;
}
 
static void mainboard_smbios_strings(
        struct device *dev, struct smbios_type11 *t)
{
        char tpec[] = "IBM ThinkPad Embedded Controller -[                 ]-";
        u16 fwvh, fwvl;
 
        mainboard_fill_ec_version(tpec + 35, 17);
        t->count = smbios_add_string(t->eos, tpec);
 
        /* Apparently byteswapped compared to H8 */
        fwvh = ec_mm_read(0xe8);
        fwvl = ec_mm_read(0xe9);
 
        printk(BIOS_INFO, "EC Firmware ID %.54s, Version %d.%d%d%c\n", tpec,
               fwvh >> 4, fwvh & 0x0f, fwvl >> 4, 0x41 + (fwvl & 0xf));
}
 
static void mainboard_enable(struct device *dev)
{
        dev->ops->get_smbios_strings = mainboard_smbios_strings,
 
        install_intel_vga_int15_handler(
                GMA_INT15_ACTIVE_LFP_INT_LVDS,
                GMA_INT15_PANEL_FIT_DEFAULT,
                GMA_INT15_BOOT_DISPLAY_DEFAULT,
                0);
 
        if (!acpi_is_wakeup_s3())
                lenovo_s230u_ec_init();
}
 
struct chip_operations mainboard_ops = {
        .enable_dev = mainboard_enable,
};