// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
 */

/*
 * CPU specific code for the MPC83xx family.
 *
 * Derived from the MPC8260 and MPC85xx.
 */

#include <common.h>
#include <cpu_func.h>
#include <irq_func.h>
#include <vsprintf.h>
#include <watchdog.h>
#include <command.h>
#include <mpc83xx.h>
#include <asm/processor.h>
#include <linux/libfdt.h>
#include <tsec.h>
#include <netdev.h>
#include <fsl_esdhc.h>
#if defined(CONFIG_BOOTCOUNT_LIMIT) && !defined(CONFIG_ARCH_MPC831X)
#include <linux/immap_qe.h>
#include <asm/io.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

#ifndef CONFIG_CPU_MPC83XX
int checkcpu(void)
{
        volatile immap_t *immr;
        ulong clock = gd->cpu_clk;
        u32 pvr = get_pvr();
        u32 spridr;
        char buf[32];
        int ret;
        int i;

        const struct cpu_type {
                char name[15];
                u32 partid;
        } cpu_type_list [] = {
                CPU_TYPE_ENTRY(8308),
                CPU_TYPE_ENTRY(8309),
                CPU_TYPE_ENTRY(8311),
                CPU_TYPE_ENTRY(8313),
                CPU_TYPE_ENTRY(8314),
                CPU_TYPE_ENTRY(8315),
                CPU_TYPE_ENTRY(8321),
                CPU_TYPE_ENTRY(8323),
                CPU_TYPE_ENTRY(8343),
                CPU_TYPE_ENTRY(8347_TBGA_),
                CPU_TYPE_ENTRY(8347_PBGA_),
                CPU_TYPE_ENTRY(8349),
                CPU_TYPE_ENTRY(8358_TBGA_),
                CPU_TYPE_ENTRY(8358_PBGA_),
                CPU_TYPE_ENTRY(8360),
                CPU_TYPE_ENTRY(8377),
                CPU_TYPE_ENTRY(8378),
                CPU_TYPE_ENTRY(8379),
        };

        immr = (immap_t *)CONFIG_SYS_IMMR;

        ret = prt_83xx_rsr();
        if (ret)
                return ret;

        puts("CPU:   ");

        switch (pvr & 0xffff0000) {
                case PVR_E300C1:
                        printf("e300c1, ");
                        break;

                case PVR_E300C2:
                        printf("e300c2, ");
                        break;

                case PVR_E300C3:
                        printf("e300c3, ");
                        break;

                case PVR_E300C4:
                        printf("e300c4, ");
                        break;

                default:
                        printf("Unknown core, ");
        }

        spridr = immr->sysconf.spridr;

        for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
                if (cpu_type_list[i].partid == PARTID_NO_E(spridr)) {
                        puts("MPC");
                        puts(cpu_type_list[i].name);
                        if (IS_E_PROCESSOR(spridr))
                                puts("E");
                        if ((SPR_FAMILY(spridr) == SPR_834X_FAMILY ||
                             SPR_FAMILY(spridr) == SPR_836X_FAMILY) &&
                            REVID_MAJOR(spridr) >= 2)
                                puts("A");
                        printf(", Rev: %d.%d", REVID_MAJOR(spridr),
                               REVID_MINOR(spridr));
                        break;
                }

        if (i == ARRAY_SIZE(cpu_type_list))
                printf("(SPRIDR %08x unknown), ", spridr);

        printf(" at %s MHz, ", strmhz(buf, clock));

        printf("CSB: %s MHz\n", strmhz(buf, gd->arch.csb_clk));

        return 0;
}
#endif

#ifndef CONFIG_SYSRESET
int
do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
        ulong msr;
#ifndef MPC83xx_RESET
        ulong addr;
#endif

        volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;

        puts("Resetting the board.\n");

#ifdef MPC83xx_RESET

        /* Interrupts and MMU off */
        msr = mfmsr();
        msr &= ~(MSR_EE | MSR_IR | MSR_DR);
        mtmsr(msr);

        /* enable Reset Control Reg */
        immap->reset.rpr = 0x52535445;
        sync();
        isync();

        /* confirm Reset Control Reg is enabled */
        while(!((immap->reset.rcer) & RCER_CRE))
                ;

        udelay(200);

        /* perform reset, only one bit */
        immap->reset.rcr = RCR_SWHR;

#else   /* ! MPC83xx_RESET */

        immap->reset.rmr = RMR_CSRE;    /* Checkstop Reset enable */

        /* Interrupts and MMU off */
        msr = mfmsr();
        msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
        mtmsr(msr);

        /*
         * Trying to execute the next instruction at a non-existing address
         * should cause a machine check, resulting in reset
         */
        addr = CONFIG_SYS_RESET_ADDRESS;

        ((void (*)(void)) addr) ();
#endif  /* MPC83xx_RESET */

        return 1;
}
#endif

/*
 * Get timebase clock frequency (like cpu_clk in Hz)
 */
#ifndef CONFIG_TIMER
unsigned long get_tbclk(void)
{
        return (gd->bus_clk + 3L) / 4L;
}
#endif

#if defined(CONFIG_WATCHDOG)
void watchdog_reset (void)
{
        int re_enable = disable_interrupts();

        /* Reset the 83xx watchdog */
        volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
        immr->wdt.swsrr = 0x556c;
        immr->wdt.swsrr = 0xaa39;

        if (re_enable)
                enable_interrupts();
}
#endif

#ifndef CONFIG_DM_ETH
/*
 * Initializes on-chip ethernet controllers.
 * to override, implement board_eth_init()
 */
int cpu_eth_init(bd_t *bis)
{
#if defined(CONFIG_UEC_ETH)
        uec_standard_init(bis);
#endif

#if defined(CONFIG_TSEC_ENET)
        tsec_standard_init(bis);
#endif
        return 0;
}
#endif /* !CONFIG_DM_ETH */

/*
 * Initializes on-chip MMC controllers.
 * to override, implement board_mmc_init()
 */
int cpu_mmc_init(bd_t *bis)
{
#ifdef CONFIG_FSL_ESDHC
        return fsl_esdhc_mmc_init(bis);
#else
        return 0;
#endif
}

void ppcDWstore(unsigned int *addr, unsigned int *value)
{
        asm("lfd 1, 0(%1)\n\t"
            "stfd 1, 0(%0)"
            :
            : "r" (addr), "r" (value)
            : "memory");
}

void ppcDWload(unsigned int *addr, unsigned int *ret)
{
        asm("lfd 1, 0(%0)\n\t"
            "stfd 1, 0(%1)"
            :
            : "r" (addr), "r" (ret)
            : "memory");
}