// SPDX-License-Identifier: GPL-2.0-only
/*
 * Code commons to all DaVinci SoCs.
 *
 * Author: Mark A. Greer <mgreer@mvista.com>
 *
 * 2009 (c) MontaVista Software, Inc.
 */
#include <linux/module.h>
#include <linux/io.h>
#include <linux/etherdevice.h>
#include <linux/davinci_emac.h>
#include <linux/dma-mapping.h>
#include <linux/platform_data/davinci-cpufreq.h>

#include <asm/tlb.h>
#include <asm/mach/map.h>

#include "common.h"
#include "cputype.h"

struct davinci_soc_info davinci_soc_info;
EXPORT_SYMBOL(davinci_soc_info);

static int __init davinci_init_id(struct davinci_soc_info *soc_info)
{
        int                     i;
        struct davinci_id       *dip;
        u8                      variant;
        u16                     part_no;
        void __iomem            *base;

        base = ioremap(soc_info->jtag_id_reg, SZ_4K);
        if (!base) {
                pr_err("Unable to map JTAG ID register\n");
                return -ENOMEM;
        }

        soc_info->jtag_id = __raw_readl(base);
        iounmap(base);

        variant = (soc_info->jtag_id & 0xf0000000) >> 28;
        part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;

        for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
                        i++, dip++)
                /* Don't care about the manufacturer right now */
                if ((dip->part_no == part_no) && (dip->variant == variant)) {
                        soc_info->cpu_id = dip->cpu_id;
                        pr_info("DaVinci %s variant 0x%x\n", dip->name,
                                        dip->variant);
                        return 0;
                }

        pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
        return -EINVAL;
}

void __init davinci_common_init(const struct davinci_soc_info *soc_info)
{
        int ret;

        if (!soc_info) {
                ret = -EINVAL;
                goto err;
        }

        memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));

        if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
                iotable_init(davinci_soc_info.io_desc,
                                davinci_soc_info.io_desc_num);

        /*
         * Normally devicemaps_init() would flush caches and tlb after
         * mdesc->map_io(), but we must also do it here because of the CPU
         * revision check below.
         */
        local_flush_tlb_all();
        flush_cache_all();

        /*
         * We want to check CPU revision early for cpu_is_xxxx() macros.
         * IO space mapping must be initialized before we can do that.
         */
        ret = davinci_init_id(&davinci_soc_info);
        if (ret < 0)
                goto err;


        return;

err:
        panic("davinci_common_init: SoC Initialization failed\n");
}

void __init davinci_init_late(void)
{
        davinci_cpufreq_init();
}