/*
 * (C) Copyright 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
 *
 * (C) Copyright 2003
 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
 *
 * (C) Copyright 2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 *   Added support for reading flash partition table from environment.
 *   Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
 *   kernel tree.
 *
 *   $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
 *   Copyright 2002 SYSGO Real-Time Solutions GmbH
 *
 * 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
 */

/*
 * Three environment variables are used by the parsing routines:
 *
 * 'partition' - keeps current partition identifier
 *
 * partition  := <part-id>
 * <part-id>  := <dev-id>,part_num
 *
 *
 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
 *
 * mtdids=<idmap>[,<idmap>,...]
 *
 * <idmap>    := <dev-id>=<mtd-id>
 * <dev-id>   := 'nand'|'nor'|'onenand'<dev-num>
 * <dev-num>  := mtd device number, 0...
 * <mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)
 *
 *
 * 'mtdparts' - partition list
 *
 * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
 *
 * <mtd-def>  := <mtd-id>:<part-def>[,<part-def>...]
 * <mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)
 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
 * <size>     := standard linux memsize OR '-' to denote all remaining space
 * <offset>   := partition start offset within the device
 * <name>     := '(' NAME ')'
 * <ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)
 *
 * Notes:
 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
 * - if the above variables are not set defaults for a given target are used
 *
 * Examples:
 *
 * 1 NOR Flash, with 1 single writable partition:
 * mtdids=nor0=edb7312-nor
 * mtdparts=mtdparts=edb7312-nor:-
 *
 * 1 NOR Flash with 2 partitions, 1 NAND with one
 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
 * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
 *
 */

/*
 * JFFS2/CRAMFS support
 */
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <jffs2/jffs2.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <cramfs/cramfs_fs.h>

#if defined(CONFIG_CMD_NAND)
#ifdef CONFIG_NAND_LEGACY
#include <linux/mtd/nand_legacy.h>
#else /* !CONFIG_NAND_LEGACY */
#include <linux/mtd/nand.h>
#include <nand.h>
#endif /* !CONFIG_NAND_LEGACY */
#endif

#if defined(CONFIG_CMD_ONENAND)
#include <linux/mtd/mtd.h>
#include <linux/mtd/onenand.h>
#include <onenand_uboot.h>
#endif

/* enable/disable debugging messages */
#define DEBUG_JFFS
#undef  DEBUG_JFFS

#ifdef  DEBUG_JFFS
# define DEBUGF(fmt, args...)   printf(fmt ,##args)
#else
# define DEBUGF(fmt, args...)
#endif

/* special size referring to all the remaining space in a partition */
#define SIZE_REMAINING          0xFFFFFFFF

/* special offset value, it is used when not provided by user
 *
 * this value is used temporarily during parsing, later such offests
 * are recalculated */
#define OFFSET_NOT_SPECIFIED    0xFFFFFFFF

/* minimum partition size */
#define MIN_PART_SIZE           4096

/* this flag needs to be set in part_info struct mask_flags
 * field for read-only partitions */
#define MTD_WRITEABLE_CMD               1

/* current active device and partition number */
#ifdef CONFIG_CMD_MTDPARTS
/* Use the ones declared in cmd_mtdparts.c */
extern struct mtd_device *current_mtd_dev;
extern u8 current_mtd_partnum;
#else
/* Use local ones */
struct mtd_device *current_mtd_dev = NULL;
u8 current_mtd_partnum = 0;
#endif

#if defined(CONFIG_CMD_CRAMFS)
extern int cramfs_check (struct part_info *info);
extern int cramfs_load (char *loadoffset, struct part_info *info, char *filename);
extern int cramfs_ls (struct part_info *info, char *filename);
extern int cramfs_info (struct part_info *info);
#else
/* defining empty macros for function names is ugly but avoids ifdef clutter
 * all over the code */
#define cramfs_check(x)         (0)
#define cramfs_load(x,y,z)      (-1)
#define cramfs_ls(x,y)          (0)
#define cramfs_info(x)          (0)
#endif

#ifndef CONFIG_CMD_MTDPARTS
/**
 * Check device number to be within valid range for given device type.
 *
 * @param dev device to validate
 * @return 0 if device is valid, 1 otherwise
 */
static int mtd_device_validate(u8 type, u8 num, u32 *size)
{
        if (type == MTD_DEV_TYPE_NOR) {
#if defined(CONFIG_CMD_FLASH)
                if (num < CONFIG_SYS_MAX_FLASH_BANKS) {
                        extern flash_info_t flash_info[];
                        *size = flash_info[num].size;

                        return 0;
                }

                printf("no such FLASH device: %s%d (valid range 0 ... %d\n",
                                MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_FLASH_BANKS - 1);
#else
                printf("support for FLASH devices not present\n");
#endif
        } else if (type == MTD_DEV_TYPE_NAND) {
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
                if (num < CONFIG_SYS_MAX_NAND_DEVICE) {
#ifndef CONFIG_NAND_LEGACY
                        *size = nand_info[num].size;
#else
                        extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];
                        *size = nand_dev_desc[num].totlen;
#endif
                        return 0;
                }

                printf("no such NAND device: %s%d (valid range 0 ... %d)\n",
                                MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_NAND_DEVICE - 1);
#else
                printf("support for NAND devices not present\n");
#endif
        } else if (type == MTD_DEV_TYPE_ONENAND) {
#if defined(CONFIG_CMD_ONENAND)
                *size = onenand_mtd.size;
                return 0;
#else
                printf("support for OneNAND devices not present\n");
#endif
        } else
                printf("Unknown defice type %d\n", type);

        return 1;
}

/**
 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
 * return device type and number.
 *
 * @param id string describing device id
 * @param ret_id output pointer to next char after parse completes (output)
 * @param dev_type parsed device type (output)
 * @param dev_num parsed device number (output)
 * @return 0 on success, 1 otherwise
 */
static int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num)
{
        const char *p = id;

        *dev_type = 0;
        if (strncmp(p, "nand", 4) == 0) {
                *dev_type = MTD_DEV_TYPE_NAND;
                p += 4;
        } else if (strncmp(p, "nor", 3) == 0) {
                *dev_type = MTD_DEV_TYPE_NOR;
                p += 3;
        } else if (strncmp(p, "onenand", 7) == 0) {
                *dev_type = MTD_DEV_TYPE_ONENAND;
                p += 7;
        } else {
                printf("incorrect device type in %s\n", id);
                return 1;
        }

        if (!isdigit(*p)) {
                printf("incorrect device number in %s\n", id);
                return 1;
        }

        *dev_num = simple_strtoul(p, (char **)&p, 0);
        if (ret_id)
                *ret_id = p;
        return 0;
}

/*
 * 'Static' version of command line mtdparts_init() routine. Single partition on
 * a single device configuration.
 */

/**
 * Calculate sector size.
 *
 * @return sector size
 */
static inline u32 get_part_sector_size_nand(struct mtdids *id)
{
#if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
#if defined(CONFIG_NAND_LEGACY)
        extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];

        return nand_dev_desc[id->num].erasesize;
#else
        nand_info_t *nand;

        nand = &nand_info[id->num];

        return nand->erasesize;
#endif
#else
        BUG();
        return 0;
#endif
}

static inline u32 get_part_sector_size_nor(struct mtdids *id, struct part_info *part)
{
#if defined(CONFIG_CMD_FLASH)
        extern flash_info_t flash_info[];

        u32 end_phys, start_phys, sector_size = 0, size = 0;
        int i;
        flash_info_t *flash;

        flash = &flash_info[id->num];

        start_phys = flash->start[0] + part->offset;
        end_phys = start_phys + part->size;

        for (i = 0; i < flash->sector_count; i++) {
                if (flash->start[i] >= end_phys)
                        break;

                if (flash->start[i] >= start_phys) {
                        if (i == flash->sector_count - 1) {
                                size = flash->start[0] + flash->size - flash->start[i];
                        } else {
                                size = flash->start[i+1] - flash->start[i];
                        }

                        if (sector_size < size)
                                sector_size = size;
                }
        }

        return sector_size;
#else
        BUG();
        return 0;
#endif
}

static inline u32 get_part_sector_size_onenand(void)
{
#if defined(CONFIG_CMD_ONENAND)
        struct mtd_info *mtd;

        mtd = &onenand_mtd;

        return mtd->erasesize;
#else
        BUG();
        return 0;
#endif
}

static inline u32 get_part_sector_size(struct mtdids *id, struct part_info *part)
{
        if (id->type == MTD_DEV_TYPE_NAND)
                return get_part_sector_size_nand(id);
        else if (id->type == MTD_DEV_TYPE_NOR)
                return get_part_sector_size_nor(id, part);
        else if (id->type == MTD_DEV_TYPE_ONENAND)
                return get_part_sector_size_onenand();
        else
                DEBUGF("Error: Unknown device type.\n");

        return 0;
}

/**
 * Parse and initialize global mtdids mapping and create global
 * device/partition list.
 *
 * 'Static' version of command line mtdparts_init() routine. Single partition on
 * a single device configuration.
 *
 * @return 0 on success, 1 otherwise
 */
int mtdparts_init(void)
{
        static int initialized = 0;
        u32 size;
        char *dev_name;

        DEBUGF("\n---mtdparts_init---\n");
        if (!initialized) {
                struct mtdids *id;
                struct part_info *part;

                initialized = 1;
                current_mtd_dev = (struct mtd_device *)
                        malloc(sizeof(struct mtd_device) +
                                        sizeof(struct part_info) +
                                        sizeof(struct mtdids));
                if (!current_mtd_dev) {
                        printf("out of memory\n");
                        return 1;
                }
                memset(current_mtd_dev, 0, sizeof(struct mtd_device) +
                       sizeof(struct part_info) + sizeof(struct mtdids));

                id = (struct mtdids *)(current_mtd_dev + 1);
                part = (struct part_info *)(id + 1);

                /* id */
                id->mtd_id = "single part";

#if defined(CONFIG_JFFS2_DEV)
                dev_name = CONFIG_JFFS2_DEV;
#else
                dev_name = "nor0";
#endif

                if ((mtd_id_parse(dev_name, NULL, &id->type, &id->num) != 0) ||
                                (mtd_device_validate(id->type, id->num, &size) != 0)) {
                        printf("incorrect device: %s%d\n", MTD_DEV_TYPE(id->type), id->num);
                        free(current_mtd_dev);
                        return 1;
                }
                id->size = size;
                INIT_LIST_HEAD(&id->link);

                DEBUGF("dev id: type = %d, num = %d, size = 0x%08lx, mtd_id = %s\n",
                                id->type, id->num, id->size, id->mtd_id);

                /* partition */
                part->name = "static";
                part->auto_name = 0;

#if defined(CONFIG_JFFS2_PART_SIZE)
                part->size = CONFIG_JFFS2_PART_SIZE;
#else
                part->size = SIZE_REMAINING;
#endif

#if defined(CONFIG_JFFS2_PART_OFFSET)
                part->offset = CONFIG_JFFS2_PART_OFFSET;
#else
                part->offset = 0x00000000;
#endif

                part->sector_size = get_part_sector_size(id, part);

                part->dev = current_mtd_dev;
                INIT_LIST_HEAD(&part->link);

                /* recalculate size if needed */
                if (part->size == SIZE_REMAINING)
                        part->size = id->size - part->offset;

                DEBUGF("part  : name = %s, size = 0x%08lx, offset = 0x%08lx\n",
                                part->name, part->size, part->offset);

                /* device */
                current_mtd_dev->id = id;
                INIT_LIST_HEAD(&current_mtd_dev->link);
                current_mtd_dev->num_parts = 1;
                INIT_LIST_HEAD(&current_mtd_dev->parts);
                list_add(&part->link, &current_mtd_dev->parts);
        }

        return 0;
}
#endif /* #ifndef CONFIG_CMD_MTDPARTS */

/**
 * Return pointer to the partition of a requested number from a requested
 * device.
 *
 * @param dev device that is to be searched for a partition
 * @param part_num requested partition number
 * @return pointer to the part_info, NULL otherwise
 */
static struct part_info* jffs2_part_info(struct mtd_device *dev, unsigned int part_num)
{
        struct list_head *entry;
        struct part_info *part;
        int num;

        if (!dev)
                return NULL;

        DEBUGF("\n--- jffs2_part_info: partition number %d for device %s%d (%s)\n",
                        part_num, MTD_DEV_TYPE(dev->id->type),
                        dev->id->num, dev->id->mtd_id);

        if (part_num >= dev->num_parts) {
                printf("invalid partition number %d for device %s%d (%s)\n",
                                part_num, MTD_DEV_TYPE(dev->id->type),
                                dev->id->num, dev->id->mtd_id);
                return NULL;
        }

        /* locate partition number, return it */
        num = 0;
        list_for_each(entry, &dev->parts) {
                part = list_entry(entry, struct part_info, link);

                if (part_num == num++) {
                        return part;
                }
        }

        return NULL;
}

/***************************************************/
/* U-boot commands                                 */
/***************************************************/

/**
 * Routine implementing fsload u-boot command. This routine tries to load
 * a requested file from jffs2/cramfs filesystem on a current partition.
 *
 * @param cmdtp command internal data
 * @param flag command flag
 * @param argc number of arguments supplied to the command
 * @param argv arguments list
 * @return 0 on success, 1 otherwise
 */
int do_jffs2_fsload(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        char *fsname;
        char *filename;
        int size;
        struct part_info *part;
        ulong offset = load_addr;

        /* pre-set Boot file name */
        if ((filename = getenv("bootfile")) == NULL) {
                filename = "uImage";
        }

        if (argc == 2) {
                filename = argv[1];
        }
        if (argc == 3) {
                offset = simple_strtoul(argv[1], NULL, 16);
                load_addr = offset;
                filename = argv[2];
        }

        /* make sure we are in sync with env variables */
        if (mtdparts_init() !=0)
                return 1;

        if ((part = jffs2_part_info(current_mtd_dev, current_mtd_partnum))){

                /* check partition type for cramfs */
                fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
                printf("### %s loading '%s' to 0x%lx\n", fsname, filename, offset);

                if (cramfs_check(part)) {
                        size = cramfs_load ((char *) offset, part, filename);
                } else {
                        /* if this is not cramfs assume jffs2 */
                        size = jffs2_1pass_load((char *)offset, part, filename);
                }

                if (size > 0) {
                        char buf[10];
                        printf("### %s load complete: %d bytes loaded to 0x%lx\n",
                                fsname, size, offset);
                        sprintf(buf, "%x", size);
                        setenv("filesize", buf);
                } else {
                        printf("### %s LOAD ERROR<%x> for %s!\n", fsname, size, filename);
                }

                return !(size > 0);
        }
        return 1;
}

/**
 * Routine implementing u-boot ls command which lists content of a given
 * directory on a current partition.
 *
 * @param cmdtp command internal data
 * @param flag command flag
 * @param argc number of arguments supplied to the command
 * @param argv arguments list
 * @return 0 on success, 1 otherwise
 */
int do_jffs2_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        char *filename = "/";
        int ret;
        struct part_info *part;

        if (argc == 2)
                filename = argv[1];

        /* make sure we are in sync with env variables */
        if (mtdparts_init() !=0)
                return 1;

        if ((part = jffs2_part_info(current_mtd_dev, current_mtd_partnum))){

                /* check partition type for cramfs */
                if (cramfs_check(part)) {
                        ret = cramfs_ls (part, filename);
                } else {
                        /* if this is not cramfs assume jffs2 */
                        ret = jffs2_1pass_ls(part, filename);
                }

                return ret ? 0 : 1;
        }
        return 1;
}

/**
 * Routine implementing u-boot fsinfo command. This routine prints out
 * miscellaneous filesystem informations/statistics.
 *
 * @param cmdtp command internal data
 * @param flag command flag
 * @param argc number of arguments supplied to the command
 * @param argv arguments list
 * @return 0 on success, 1 otherwise
 */
int do_jffs2_fsinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        struct part_info *part;
        char *fsname;
        int ret;

        /* make sure we are in sync with env variables */
        if (mtdparts_init() !=0)
                return 1;

        if ((part = jffs2_part_info(current_mtd_dev, current_mtd_partnum))){

                /* check partition type for cramfs */
                fsname = (cramfs_check(part) ? "CRAMFS" : "JFFS2");
                printf("### filesystem type is %s\n", fsname);

                if (cramfs_check(part)) {
                        ret = cramfs_info (part);
                } else {
                        /* if this is not cramfs assume jffs2 */
                        ret = jffs2_1pass_info(part);
                }

                return ret ? 0 : 1;
        }
        return 1;
}

/***************************************************/
U_BOOT_CMD(
        fsload, 3,      0,      do_jffs2_fsload,
        "load binary file from a filesystem image",
        "[ off ] [ filename ]\n"
        "    - load binary file from flash bank\n"
        "      with offset 'off'\n"
);
U_BOOT_CMD(
        ls,     2,      1,      do_jffs2_ls,
        "list files in a directory (default /)",
        "[ directory ]\n"
        "    - list files in a directory.\n"
);

U_BOOT_CMD(
        fsinfo, 1,      1,      do_jffs2_fsinfo,
        "print information about filesystems",
        "    - print information about filesystems\n"
);
/***************************************************/