// SPDX-License-Identifier: GPL-2.0
/*
 * Author: Huacai Chen <chenhuacai@loongson.cn>
 *
 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
 */
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/efi.h>
#include <linux/export.h>
#include <linux/memblock.h>
#include <linux/of_clk.h>
#include <asm/early_ioremap.h>
#include <asm/bootinfo.h>
#include <asm/loongson.h>
#include <asm/setup.h>
#include <asm/time.h>

u64 efi_system_table;
struct loongson_system_configuration loongson_sysconf;
EXPORT_SYMBOL(loongson_sysconf);

void __init init_environ(void)
{
        int efi_boot = fw_arg0;
        char *cmdline = early_memremap_ro(fw_arg1, COMMAND_LINE_SIZE);

        if (efi_boot)
                set_bit(EFI_BOOT, &efi.flags);
        else
                clear_bit(EFI_BOOT, &efi.flags);

        strscpy(boot_command_line, cmdline, COMMAND_LINE_SIZE);
        strscpy(init_command_line, cmdline, COMMAND_LINE_SIZE);
        early_memunmap(cmdline, COMMAND_LINE_SIZE);

        efi_system_table = fw_arg2;
}

static int __init init_cpu_fullname(void)
{
        int cpu, ret;
        char *cpuname;
        const char *model;

        /* Parsing cpuname from DTS model property */
        ret = of_property_read_string(of_root, "model", &model);
        if (ret == 0) {
                cpuname = kstrdup(model, GFP_KERNEL);
                if (!cpuname)
                        return -ENOMEM;
                loongson_sysconf.cpuname = strsep(&cpuname, " ");
        }

        if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) {
                for (cpu = 0; cpu < NR_CPUS; cpu++)
                        __cpu_full_name[cpu] = loongson_sysconf.cpuname;
        }
        return 0;
}
arch_initcall(init_cpu_fullname);

static int __init fdt_cpu_clk_init(void)
{
        struct clk *clk;
        struct device_node *np;

        np = of_get_cpu_node(0, NULL);
        if (!np)
                return -ENODEV;

        clk = of_clk_get(np, 0);
        of_node_put(np);
        cpu_clock_freq = 200 * 1000 * 1000;

        if (IS_ERR(clk)) {
                pr_warn("No valid CPU clock freq, assume 200MHz.\n");
                return -ENODEV;
        }

        cpu_clock_freq = clk_get_rate(clk);
        clk_put(clk);

        return 0;
}
late_initcall(fdt_cpu_clk_init);

static ssize_t boardinfo_show(struct kobject *kobj,
                              struct kobj_attribute *attr, char *buf)
{
        return sysfs_emit(buf,
                "BIOS Information\n"
                "Vendor\t\t\t: %s\n"
                "Version\t\t\t: %s\n"
                "ROM Size\t\t: %d KB\n"
                "Release Date\t\t: %s\n\n"
                "Board Information\n"
                "Manufacturer\t\t: %s\n"
                "Board Name\t\t: %s\n"
                "Family\t\t\t: LOONGSON64\n\n",
                b_info.bios_vendor, b_info.bios_version,
                b_info.bios_size, b_info.bios_release_date,
                b_info.board_vendor, b_info.board_name);
}

static struct kobj_attribute boardinfo_attr = __ATTR(boardinfo, 0444,
                                                     boardinfo_show, NULL);

static int __init boardinfo_init(void)
{
        struct kobject *loongson_kobj;

        loongson_kobj = kobject_create_and_add("loongson", firmware_kobj);
        if (!loongson_kobj)
                return -ENOMEM;

        return sysfs_create_file(loongson_kobj, &boardinfo_attr.attr);
}
late_initcall(boardinfo_init);