/*
 * (C) Copyright 2000-2011
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

/* Code taken from cmd_ide.c */
#include <common.h>
#include <ata.h>
#include "ide.h"

#ifdef CONFIG_IDE_8xx_DIRECT
#include <mpc8xx.h>
#include <pcmcia.h>
DECLARE_GLOBAL_DATA_PTR;

/* Timings for IDE Interface
 *
 * SETUP / LENGTH / HOLD - cycles valid for 50 MHz clk
 * 70      165      30     PIO-Mode 0, [ns]
 *  4        9       2                 [Cycles]
 * 50      125      20     PIO-Mode 1, [ns]
 *  3        7       2                 [Cycles]
 * 30      100      15     PIO-Mode 2, [ns]
 *  2        6       1                 [Cycles]
 * 30       80      10     PIO-Mode 3, [ns]
 *  2        5       1                 [Cycles]
 * 25       70      10     PIO-Mode 4, [ns]
 *  2        4       1                 [Cycles]
 */

static const pio_config_t pio_config_ns[IDE_MAX_PIO_MODE+1] = {
    /*  Setup  Length  Hold  */
        { 70,   165,    30 },           /* PIO-Mode 0, [ns]     */
        { 50,   125,    20 },           /* PIO-Mode 1, [ns]     */
        { 30,   101,    15 },           /* PIO-Mode 2, [ns]     */
        { 30,    80,    10 },           /* PIO-Mode 3, [ns]     */
        { 25,    70,    10 },           /* PIO-Mode 4, [ns]     */
};

static pio_config_t pio_config_clk[IDE_MAX_PIO_MODE+1];

#ifndef CONFIG_SYS_PIO_MODE
#define CONFIG_SYS_PIO_MODE     0       /* use a relaxed default */
#endif
static int pio_mode = CONFIG_SYS_PIO_MODE;

/* Make clock cycles and always round up */

#define PCMCIA_MK_CLKS(t, T) (((t) * (T) + 999U) / 1000U)

static void set_pcmcia_timing(int pmode)
{
        volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
        volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
        ulong timings;

        debug("Set timing for PIO Mode %d\n", pmode);

        timings = PCMCIA_SHT(pio_config_clk[pmode].t_hold)
                | PCMCIA_SST(pio_config_clk[pmode].t_setup)
                | PCMCIA_SL(pio_config_clk[pmode].t_length);

        /*
         * IDE 0
         */
        pcmp->pcmc_pbr0 = CONFIG_SYS_PCMCIA_PBR0;
#if (CONFIG_SYS_PCMCIA_POR0 != 0)
        pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0 | timings;
#else
        pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0;
#endif
        debug("PBR0: %08x  POR0: %08x\n", pcmp->pcmc_pbr0, pcmp->pcmc_por0);

        pcmp->pcmc_pbr1 = CONFIG_SYS_PCMCIA_PBR1;
#if (CONFIG_SYS_PCMCIA_POR1 != 0)
        pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1 | timings;
#else
        pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1;
#endif
        debug("PBR1: %08x  POR1: %08x\n", pcmp->pcmc_pbr1, pcmp->pcmc_por1);

        pcmp->pcmc_pbr2 = CONFIG_SYS_PCMCIA_PBR2;
#if (CONFIG_SYS_PCMCIA_POR2 != 0)
        pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2 | timings;
#else
        pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2;
#endif
        debug("PBR2: %08x  POR2: %08x\n", pcmp->pcmc_pbr2, pcmp->pcmc_por2);

        pcmp->pcmc_pbr3 = CONFIG_SYS_PCMCIA_PBR3;
#if (CONFIG_SYS_PCMCIA_POR3 != 0)
        pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3 | timings;
#else
        pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3;
#endif
        debug("PBR3: %08x  POR3: %08x\n", pcmp->pcmc_pbr3, pcmp->pcmc_por3);

        /*
         * IDE 1
         */
        pcmp->pcmc_pbr4 = CONFIG_SYS_PCMCIA_PBR4;
#if (CONFIG_SYS_PCMCIA_POR4 != 0)
        pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4 | timings;
#else
        pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4;
#endif
        debug("PBR4: %08x  POR4: %08x\n", pcmp->pcmc_pbr4, pcmp->pcmc_por4);

        pcmp->pcmc_pbr5 = CONFIG_SYS_PCMCIA_PBR5;
#if (CONFIG_SYS_PCMCIA_POR5 != 0)
        pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5 | timings;
#else
        pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5;
#endif
        debug("PBR5: %08x  POR5: %08x\n", pcmp->pcmc_pbr5, pcmp->pcmc_por5);

        pcmp->pcmc_pbr6 = CONFIG_SYS_PCMCIA_PBR6;
#if (CONFIG_SYS_PCMCIA_POR6 != 0)
        pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6 | timings;
#else
        pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6;
#endif
        debug("PBR6: %08x  POR6: %08x\n", pcmp->pcmc_pbr6, pcmp->pcmc_por6);

        pcmp->pcmc_pbr7 = CONFIG_SYS_PCMCIA_PBR7;
#if (CONFIG_SYS_PCMCIA_POR7 != 0)
        pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7 | timings;
#else
        pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7;
#endif
        debug("PBR7: %08x  POR7: %08x\n", pcmp->pcmc_pbr7, pcmp->pcmc_por7);

}

int ide_preinit(void)
{
        int i;
        /* Initialize PIO timing tables */
        for (i = 0; i <= IDE_MAX_PIO_MODE; ++i) {
                pio_config_clk[i].t_setup =
                        PCMCIA_MK_CLKS(pio_config_ns[i].t_setup, gd->bus_clk);
                pio_config_clk[i].t_length =
                        PCMCIA_MK_CLKS(pio_config_ns[i].t_length, gd->bus_clk);
                pio_config_clk[i].t_hold =
                        PCMCIA_MK_CLKS(pio_config_ns[i].t_hold, gd->bus_clk);
                debug("PIO Mode %d: setup=%2d ns/%d clk" "  len=%3d ns/%d clk"
                        "  hold=%2d ns/%d clk\n", i, pio_config_ns[i].t_setup,
                        pio_config_clk[i].t_setup, pio_config_ns[i].t_length,
                        pio_config_clk[i].t_length, pio_config_ns[i].t_hold,
                        pio_config_clk[i].t_hold);
        }

        return 0;
}

int ide_init_postreset(void)
{
        volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
        volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);

        /* PCMCIA / IDE initialization for common mem space */
        pcmp->pcmc_pgcrb = 0;

        /* start in PIO mode 0 - most relaxed timings */
        pio_mode = 0;
        set_pcmcia_timing(pio_mode);
        return 0;
}
#endif /* CONFIG_IDE_8xx_DIRECT */

#ifdef CONFIG_IDE_8xx_PCCARD
int ide_preinit(void)
{
        ide_devices_found = 0;
        /* initialize the PCMCIA IDE adapter card */
        pcmcia_on();
        if (!ide_devices_found)
                return 1;
        udelay(1000000);/* 1 s */
        return 0;
}
#endif