/*
 * (C) Copyright 2000-2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Modified 4/5/2001
 * Wait for completion of each sector erase command issued
 * 4/5/2001
 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
 */

#include <common.h>
#include <asm/ppc4xx.h>
#include <asm/processor.h>

#undef DEBUG
#ifdef DEBUG
#define DEBUGF(x...) printf(x)
#else
#define DEBUGF(x...)
#endif                          /* DEBUG */

/*
 * include common flash code (for amcc boards)
 */
#include "../common/flash.c"

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size(vu_long * addr, flash_info_t * info);
static void flash_get_offsets(ulong base, flash_info_t * info);

unsigned long flash_init(void)
{
        unsigned long size_b0, size_b1;
        int i;
        uint pbcr;
        unsigned long base_b0, base_b1;

        /* Init: no FLASHes known */
        for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
                flash_info[i].flash_id = FLASH_UNKNOWN;
        }

        /* Static FLASH Bank configuration here - FIXME XXX */

        size_b0 =
            flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);

        if (flash_info[0].flash_id == FLASH_UNKNOWN) {
                printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
                       size_b0, size_b0 << 20);
        }

        /* Only one bank */
        if (CONFIG_SYS_MAX_FLASH_BANKS == 1) {
                /* Setup offsets */
                flash_get_offsets(FLASH_BASE0_PRELIM, &flash_info[0]);

                /* Monitor protection ON by default */
                (void)flash_protect(FLAG_PROTECT_SET,
                                    CONFIG_SYS_MONITOR_BASE,
                                    CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
                                    &flash_info[0]);
#ifdef CONFIG_ENV_IS_IN_FLASH
                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
                                    CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
                                    &flash_info[0]);
                (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
                                    CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
                                    &flash_info[0]);
#endif

                size_b1 = 0;
                flash_info[0].size = size_b0;
        } else {
                /* 2 banks */
                size_b1 =
                    flash_get_size((vu_long *) FLASH_BASE1_PRELIM,
                                   &flash_info[1]);

                /* Re-do sizing to get full correct info */

                if (size_b1) {
                        mtdcr(EBC0_CFGADDR, PB0CR);
                        pbcr = mfdcr(EBC0_CFGDATA);
                        mtdcr(EBC0_CFGADDR, PB0CR);
                        base_b1 = -size_b1;
                        pbcr =
                            (pbcr & 0x0001ffff) | base_b1 |
                            (((size_b1 / 1024 / 1024) - 1) << 17);
                        mtdcr(EBC0_CFGDATA, pbcr);
                        /*          printf("PB1CR = %x\n", pbcr); */
                }

                if (size_b0) {
                        mtdcr(EBC0_CFGADDR, PB1CR);
                        pbcr = mfdcr(EBC0_CFGDATA);
                        mtdcr(EBC0_CFGADDR, PB1CR);
                        base_b0 = base_b1 - size_b0;
                        pbcr =
                            (pbcr & 0x0001ffff) | base_b0 |
                            (((size_b0 / 1024 / 1024) - 1) << 17);
                        mtdcr(EBC0_CFGDATA, pbcr);
                        /*            printf("PB0CR = %x\n", pbcr); */
                }

                size_b0 = flash_get_size((vu_long *) base_b0, &flash_info[0]);

                flash_get_offsets(base_b0, &flash_info[0]);

                /* monitor protection ON by default */
                (void)flash_protect(FLAG_PROTECT_SET,
                                    base_b0 + size_b0 - monitor_flash_len,
                                    base_b0 + size_b0 - 1, &flash_info[0]);

                if (size_b1) {
                        /* Re-do sizing to get full correct info */
                        size_b1 =
                            flash_get_size((vu_long *) base_b1, &flash_info[1]);

                        flash_get_offsets(base_b1, &flash_info[1]);

                        /* monitor protection ON by default */
                        (void)flash_protect(FLAG_PROTECT_SET,
                                            base_b1 + size_b1 -
                                            monitor_flash_len,
                                            base_b1 + size_b1 - 1,
                                            &flash_info[1]);
                        /* monitor protection OFF by default (one is enough) */
                        (void)flash_protect(FLAG_PROTECT_CLEAR,
                                            base_b0 + size_b0 -
                                            monitor_flash_len,
                                            base_b0 + size_b0 - 1,
                                            &flash_info[0]);
                } else {
                        flash_info[1].flash_id = FLASH_UNKNOWN;
                        flash_info[1].sector_count = -1;
                }

                flash_info[0].size = size_b0;
                flash_info[1].size = size_b1;
        }                       /* else 2 banks */
        return (size_b0 + size_b1);
}


static void flash_get_offsets(ulong base, flash_info_t * info)
{
        int i;

        /* set up sector start address table */
        if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
            (info->flash_id == FLASH_AM040)) {
                for (i = 0; i < info->sector_count; i++)
                        info->start[i] = base + (i * 0x00010000);
        } else {
                if (info->flash_id & FLASH_BTYPE) {
                        /* set sector offsets for bottom boot block type        */
                        info->start[0] = base + 0x00000000;
                        info->start[1] = base + 0x00004000;
                        info->start[2] = base + 0x00006000;
                        info->start[3] = base + 0x00008000;
                        for (i = 4; i < info->sector_count; i++) {
                                info->start[i] =
                                    base + (i * 0x00010000) - 0x00030000;
                        }
                } else {
                        /* set sector offsets for top boot block type           */
                        i = info->sector_count - 1;
                        info->start[i--] = base + info->size - 0x00004000;
                        info->start[i--] = base + info->size - 0x00006000;
                        info->start[i--] = base + info->size - 0x00008000;
                        for (; i >= 0; i--) {
                                info->start[i] = base + i * 0x00010000;
                        }
                }
        }
}