/*
 * Image manipulator for Marvell SoCs
 *  supports Kirkwood, Dove, Armada 370, and Armada XP
 *
 * (C) Copyright 2013 Thomas Petazzoni
 * <thomas.petazzoni@free-electrons.com>
 *
 * SPDX-License-Identifier:     GPL-2.0+
 *
 * Not implemented: support for the register headers and secure
 * headers in v1 images
 */

#include "imagetool.h"
#include <limits.h>
#include <image.h>
#include <stdint.h>
#include "kwbimage.h"

static struct image_cfg_element *image_cfg;
static int cfgn;

struct boot_mode {
        unsigned int id;
        const char *name;
};

struct boot_mode boot_modes[] = {
        { 0x4D, "i2c"  },
        { 0x5A, "spi"  },
        { 0x8B, "nand" },
        { 0x78, "sata" },
        { 0x9C, "pex"  },
        { 0x69, "uart" },
        { 0xAE, "sdio" },
        {},
};

struct nand_ecc_mode {
        unsigned int id;
        const char *name;
};

struct nand_ecc_mode nand_ecc_modes[] = {
        { 0x00, "default" },
        { 0x01, "hamming" },
        { 0x02, "rs" },
        { 0x03, "disabled" },
        {},
};

/* Used to identify an undefined execution or destination address */
#define ADDR_INVALID ((uint32_t)-1)

#define BINARY_MAX_ARGS 8

/* In-memory representation of a line of the configuration file */
struct image_cfg_element {
        enum {
                IMAGE_CFG_VERSION = 0x1,
                IMAGE_CFG_BOOT_FROM,
                IMAGE_CFG_DEST_ADDR,
                IMAGE_CFG_EXEC_ADDR,
                IMAGE_CFG_NAND_BLKSZ,
                IMAGE_CFG_NAND_BADBLK_LOCATION,
                IMAGE_CFG_NAND_ECC_MODE,
                IMAGE_CFG_NAND_PAGESZ,
                IMAGE_CFG_BINARY,
                IMAGE_CFG_PAYLOAD,
                IMAGE_CFG_DATA,
        } type;
        union {
                unsigned int version;
                unsigned int bootfrom;
                struct {
                        const char *file;
                        unsigned int args[BINARY_MAX_ARGS];
                        unsigned int nargs;
                } binary;
                const char *payload;
                unsigned int dstaddr;
                unsigned int execaddr;
                unsigned int nandblksz;
                unsigned int nandbadblklocation;
                unsigned int nandeccmode;
                unsigned int nandpagesz;
                struct ext_hdr_v0_reg regdata;
        };
};

#define IMAGE_CFG_ELEMENT_MAX 256

/*
 * Utility functions to manipulate boot mode and ecc modes (convert
 * them back and forth between description strings and the
 * corresponding numerical identifiers).
 */

static const char *image_boot_mode_name(unsigned int id)
{
        int i;
        for (i = 0; boot_modes[i].name; i++)
                if (boot_modes[i].id == id)
                        return boot_modes[i].name;
        return NULL;
}

int image_boot_mode_id(const char *boot_mode_name)
{
        int i;
        for (i = 0; boot_modes[i].name; i++)
                if (!strcmp(boot_modes[i].name, boot_mode_name))
                        return boot_modes[i].id;

        return -1;
}

int image_nand_ecc_mode_id(const char *nand_ecc_mode_name)
{
        int i;
        for (i = 0; nand_ecc_modes[i].name; i++)
                if (!strcmp(nand_ecc_modes[i].name, nand_ecc_mode_name))
                        return nand_ecc_modes[i].id;
        return -1;
}

static struct image_cfg_element *
image_find_option(unsigned int optiontype)
{
        int i;

        for (i = 0; i < cfgn; i++) {
                if (image_cfg[i].type == optiontype)
                        return &image_cfg[i];
        }

        return NULL;
}

static unsigned int
image_count_options(unsigned int optiontype)
{
        int i;
        unsigned int count = 0;

        for (i = 0; i < cfgn; i++)
                if (image_cfg[i].type == optiontype)
                        count++;

        return count;
}

/*
 * Compute a 8-bit checksum of a memory area. This algorithm follows
 * the requirements of the Marvell SoC BootROM specifications.
 */
static uint8_t image_checksum8(void *start, uint32_t len)
{
        uint8_t csum = 0;
        uint8_t *p = start;

        /* check len and return zero checksum if invalid */
        if (!len)
                return 0;

        do {
                csum += *p;
                p++;
        } while (--len);

        return csum;
}

static uint32_t image_checksum32(void *start, uint32_t len)
{
        uint32_t csum = 0;
        uint32_t *p = start;

        /* check len and return zero checksum if invalid */
        if (!len)
                return 0;

        if (len % sizeof(uint32_t)) {
                fprintf(stderr, "Length %d is not in multiple of %zu\n",
                        len, sizeof(uint32_t));
                return 0;
        }

        do {
                csum += *p;
                p++;
                len -= sizeof(uint32_t);
        } while (len > 0);

        return csum;
}

static void *image_create_v0(size_t *imagesz, struct image_tool_params *params,
                             int payloadsz)
{
        struct image_cfg_element *e;
        size_t headersz;
        struct main_hdr_v0 *main_hdr;
        struct ext_hdr_v0 *ext_hdr;
        void *image;
        int has_ext = 0;

        /*
         * Calculate the size of the header and the size of the
         * payload
         */
        headersz  = sizeof(struct main_hdr_v0);

        if (image_count_options(IMAGE_CFG_DATA) > 0) {
                has_ext = 1;
                headersz += sizeof(struct ext_hdr_v0);
        }

        if (image_count_options(IMAGE_CFG_PAYLOAD) > 1) {
                fprintf(stderr, "More than one payload, not possible\n");
                return NULL;
        }

        image = malloc(headersz);
        if (!image) {
                fprintf(stderr, "Cannot allocate memory for image\n");
                return NULL;
        }

        memset(image, 0, headersz);

        main_hdr = image;

        /* Fill in the main header */
        main_hdr->blocksize =
                cpu_to_le32(payloadsz + sizeof(uint32_t) - headersz);
        main_hdr->srcaddr   = cpu_to_le32(headersz);
        main_hdr->ext       = has_ext;
        main_hdr->destaddr  = cpu_to_le32(params->addr);
        main_hdr->execaddr  = cpu_to_le32(params->ep);

        e = image_find_option(IMAGE_CFG_BOOT_FROM);
        if (e)
                main_hdr->blockid = e->bootfrom;
        e = image_find_option(IMAGE_CFG_NAND_ECC_MODE);
        if (e)
                main_hdr->nandeccmode = e->nandeccmode;
        e = image_find_option(IMAGE_CFG_NAND_PAGESZ);
        if (e)
                main_hdr->nandpagesize = cpu_to_le16(e->nandpagesz);
        main_hdr->checksum = image_checksum8(image,
                                             sizeof(struct main_hdr_v0));

        /* Generate the ext header */
        if (has_ext) {
                int cfgi, datai;

                ext_hdr = image + sizeof(struct main_hdr_v0);
                ext_hdr->offset = cpu_to_le32(0x40);

                for (cfgi = 0, datai = 0; cfgi < cfgn; cfgi++) {
                        e = &image_cfg[cfgi];
                        if (e->type != IMAGE_CFG_DATA)
                                continue;

                        ext_hdr->rcfg[datai].raddr =
                                cpu_to_le32(e->regdata.raddr);
                        ext_hdr->rcfg[datai].rdata =
                                cpu_to_le32(e->regdata.rdata);
                        datai++;
                }

                ext_hdr->checksum = image_checksum8(ext_hdr,
                                                    sizeof(struct ext_hdr_v0));
        }

        *imagesz = headersz;
        return image;
}

static size_t image_headersz_v1(struct image_tool_params *params,
                                int *hasext)
{
        struct image_cfg_element *binarye;
        size_t headersz;
        int ret;

        /*
         * Calculate the size of the header and the size of the
         * payload
         */
        headersz = sizeof(struct main_hdr_v1);

        if (image_count_options(IMAGE_CFG_BINARY) > 1) {
                fprintf(stderr, "More than one binary blob, not supported\n");
                return 0;
        }

        if (image_count_options(IMAGE_CFG_PAYLOAD) > 1) {
                fprintf(stderr, "More than one payload, not possible\n");
                return 0;
        }

        binarye = image_find_option(IMAGE_CFG_BINARY);
        if (binarye) {
                struct stat s;

                ret = stat(binarye->binary.file, &s);
                if (ret < 0) {
                        char cwd[PATH_MAX];
                        char *dir = cwd;

                        memset(cwd, 0, sizeof(cwd));
                        if (!getcwd(cwd, sizeof(cwd))) {
                                dir = "current working directory";
                                perror("getcwd() failed");
                        }

                        fprintf(stderr,
                                "Didn't find the file '%s' in '%s' which is mandatory to generate the image\n"
                                "This file generally contains the DDR3 training code, and should be extracted from an existing bootable\n"
                                "image for your board. See 'kwbimage -x' to extract it from an existing image.\n",
                                binarye->binary.file, dir);
                        return 0;
                }

                headersz += sizeof(struct opt_hdr_v1) +
                        s.st_size +
                        (binarye->binary.nargs + 2) * sizeof(uint32_t);
                if (hasext)
                        *hasext = 1;
        }

#if defined(CONFIG_SYS_U_BOOT_OFFS)
        if (headersz > CONFIG_SYS_U_BOOT_OFFS) {
                fprintf(stderr, "Error: Image header (incl. SPL image) too big!\n");
                fprintf(stderr, "header=0x%x CONFIG_SYS_U_BOOT_OFFS=0x%x!\n",
                        (int)headersz, CONFIG_SYS_U_BOOT_OFFS);
                fprintf(stderr, "Increase CONFIG_SYS_U_BOOT_OFFS!\n");
                return 0;
        } else {
                headersz = CONFIG_SYS_U_BOOT_OFFS;
        }
#endif

        /*
         * The payload should be aligned on some reasonable
         * boundary
         */
        return ALIGN_SUP(headersz, 4096);
}

static void *image_create_v1(size_t *imagesz, struct image_tool_params *params,
                             int payloadsz)
{
        struct image_cfg_element *e, *binarye;
        struct main_hdr_v1 *main_hdr;
        size_t headersz;
        void *image, *cur;
        int hasext = 0;
        int ret;

        /*
         * Calculate the size of the header and the size of the
         * payload
         */
        headersz = image_headersz_v1(params, &hasext);
        if (headersz == 0)
                return NULL;

        image = malloc(headersz);
        if (!image) {
                fprintf(stderr, "Cannot allocate memory for image\n");
                return NULL;
        }

        memset(image, 0, headersz);

        cur = main_hdr = image;
        cur += sizeof(struct main_hdr_v1);

        /* Fill the main header */
        main_hdr->blocksize    =
                cpu_to_le32(payloadsz - headersz + sizeof(uint32_t));
        main_hdr->headersz_lsb = cpu_to_le16(headersz & 0xFFFF);
        main_hdr->headersz_msb = (headersz & 0xFFFF0000) >> 16;
        main_hdr->destaddr     = cpu_to_le32(params->addr);
        main_hdr->execaddr     = cpu_to_le32(params->ep);
        main_hdr->srcaddr      = cpu_to_le32(headersz);
        main_hdr->ext          = hasext;
        main_hdr->version      = 1;
        e = image_find_option(IMAGE_CFG_BOOT_FROM);
        if (e)
                main_hdr->blockid = e->bootfrom;
        e = image_find_option(IMAGE_CFG_NAND_BLKSZ);
        if (e)
                main_hdr->nandblocksize = e->nandblksz / (64 * 1024);
        e = image_find_option(IMAGE_CFG_NAND_BADBLK_LOCATION);
        if (e)
                main_hdr->nandbadblklocation = e->nandbadblklocation;

        binarye = image_find_option(IMAGE_CFG_BINARY);
        if (binarye) {
                struct opt_hdr_v1 *hdr = cur;
                uint32_t *args;
                size_t binhdrsz;
                struct stat s;
                int argi;
                FILE *bin;

                hdr->headertype = OPT_HDR_V1_BINARY_TYPE;

                bin = fopen(binarye->binary.file, "r");
                if (!bin) {
                        fprintf(stderr, "Cannot open binary file %s\n",
                                binarye->binary.file);
                        return NULL;
                }

                fstat(fileno(bin), &s);

                binhdrsz = sizeof(struct opt_hdr_v1) +
                        (binarye->binary.nargs + 2) * sizeof(uint32_t) +
                        s.st_size;

                /*
                 * The size includes the binary image size, rounded
                 * up to a 4-byte boundary. Plus 4 bytes for the
                 * next-header byte and 3-byte alignment at the end.
                 */
                binhdrsz = ALIGN_SUP(binhdrsz, 4) + 4;
                hdr->headersz_lsb = cpu_to_le16(binhdrsz & 0xFFFF);
                hdr->headersz_msb = (binhdrsz & 0xFFFF0000) >> 16;

                cur += sizeof(struct opt_hdr_v1);

                args = cur;
                *args = cpu_to_le32(binarye->binary.nargs);
                args++;
                for (argi = 0; argi < binarye->binary.nargs; argi++)
                        args[argi] = cpu_to_le32(binarye->binary.args[argi]);

                cur += (binarye->binary.nargs + 1) * sizeof(uint32_t);

                ret = fread(cur, s.st_size, 1, bin);
                if (ret != 1) {
                        fprintf(stderr,
                                "Could not read binary image %s\n",
                                binarye->binary.file);
                        return NULL;
                }

                fclose(bin);

                cur += ALIGN_SUP(s.st_size, 4);

                /*
                 * For now, we don't support more than one binary
                 * header, and no other header types are
                 * supported. So, the binary header is necessarily the
                 * last one
                 */
                *((uint32_t *)cur) = 0x00000000;

                cur += sizeof(uint32_t);
        }

        /* Calculate and set the header checksum */
        main_hdr->checksum = image_checksum8(main_hdr, headersz);

        *imagesz = headersz;
        return image;
}

static int image_create_config_parse_oneline(char *line,
                                             struct image_cfg_element *el)
{
        char *keyword, *saveptr;
        char deliminiters[] = " \t";

        keyword = strtok_r(line, deliminiters, &saveptr);
        if (!strcmp(keyword, "VERSION")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                el->type = IMAGE_CFG_VERSION;
                el->version = atoi(value);
        } else if (!strcmp(keyword, "BOOT_FROM")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                int ret = image_boot_mode_id(value);
                if (ret < 0) {
                        fprintf(stderr,
                                "Invalid boot media '%s'\n", value);
                        return -1;
                }
                el->type = IMAGE_CFG_BOOT_FROM;
                el->bootfrom = ret;
        } else if (!strcmp(keyword, "NAND_BLKSZ")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                el->type = IMAGE_CFG_NAND_BLKSZ;
                el->nandblksz = strtoul(value, NULL, 16);
        } else if (!strcmp(keyword, "NAND_BADBLK_LOCATION")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                el->type = IMAGE_CFG_NAND_BADBLK_LOCATION;
                el->nandbadblklocation =
                        strtoul(value, NULL, 16);
        } else if (!strcmp(keyword, "NAND_ECC_MODE")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                int ret = image_nand_ecc_mode_id(value);
                if (ret < 0) {
                        fprintf(stderr,
                                "Invalid NAND ECC mode '%s'\n", value);
                        return -1;
                }
                el->type = IMAGE_CFG_NAND_ECC_MODE;
                el->nandeccmode = ret;
        } else if (!strcmp(keyword, "NAND_PAGE_SIZE")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                el->type = IMAGE_CFG_NAND_PAGESZ;
                el->nandpagesz = strtoul(value, NULL, 16);
        } else if (!strcmp(keyword, "BINARY")) {
                char *value = strtok_r(NULL, deliminiters, &saveptr);
                int argi = 0;

                el->type = IMAGE_CFG_BINARY;
                el->binary.file = strdup(value);
                while (1) {
                        value = strtok_r(NULL, deliminiters, &saveptr);
                        if (!value)
                                break;
                        el->binary.args[argi] = strtoul(value, NULL, 16);
                        argi++;
                        if (argi >= BINARY_MAX_ARGS) {
                                fprintf(stderr,
                                        "Too many argument for binary\n");
                                return -1;
                        }
                }
                el->binary.nargs = argi;
        } else if (!strcmp(keyword, "DATA")) {
                char *value1 = strtok_r(NULL, deliminiters, &saveptr);
                char *value2 = strtok_r(NULL, deliminiters, &saveptr);

                if (!value1 || !value2) {
                        fprintf(stderr,
                                "Invalid number of arguments for DATA\n");
                        return -1;
                }

                el->type = IMAGE_CFG_DATA;
                el->regdata.raddr = strtoul(value1, NULL, 16);
                el->regdata.rdata = strtoul(value2, NULL, 16);
        } else {
                fprintf(stderr, "Ignoring unknown line '%s'\n", line);
        }

        return 0;
}

/*
 * Parse the configuration file 'fcfg' into the array of configuration
 * elements 'image_cfg', and return the number of configuration
 * elements in 'cfgn'.
 */
static int image_create_config_parse(FILE *fcfg)
{
        int ret;
        int cfgi = 0;

        /* Parse the configuration file */
        while (!feof(fcfg)) {
                char *line;
                char buf[256];

                /* Read the current line */
                memset(buf, 0, sizeof(buf));
                line = fgets(buf, sizeof(buf), fcfg);
                if (!line)
                        break;

                /* Ignore useless lines */
                if (line[0] == '\n' || line[0] == '#')
                        continue;

                /* Strip final newline */
                if (line[strlen(line) - 1] == '\n')
                        line[strlen(line) - 1] = 0;

                /* Parse the current line */
                ret = image_create_config_parse_oneline(line,
                                                        &image_cfg[cfgi]);
                if (ret)
                        return ret;

                cfgi++;

                if (cfgi >= IMAGE_CFG_ELEMENT_MAX) {
                        fprintf(stderr,
                                "Too many configuration elements in .cfg file\n");
                        return -1;
                }
        }

        cfgn = cfgi;
        return 0;
}

static int image_get_version(void)
{
        struct image_cfg_element *e;

        e = image_find_option(IMAGE_CFG_VERSION);
        if (!e)
                return -1;

        return e->version;
}

static int image_version_file(const char *input)
{
        FILE *fcfg;
        int version;
        int ret;

        fcfg = fopen(input, "r");
        if (!fcfg) {
                fprintf(stderr, "Could not open input file %s\n", input);
                return -1;
        }

        image_cfg = malloc(IMAGE_CFG_ELEMENT_MAX *
                           sizeof(struct image_cfg_element));
        if (!image_cfg) {
                fprintf(stderr, "Cannot allocate memory\n");
                fclose(fcfg);
                return -1;
        }

        memset(image_cfg, 0,
               IMAGE_CFG_ELEMENT_MAX * sizeof(struct image_cfg_element));
        rewind(fcfg);

        ret = image_create_config_parse(fcfg);
        fclose(fcfg);
        if (ret) {
                free(image_cfg);
                return -1;
        }

        version = image_get_version();
        /* Fallback to version 0 is no version is provided in the cfg file */
        if (version == -1)
                version = 0;

        free(image_cfg);

        return version;
}

static void kwbimage_set_header(void *ptr, struct stat *sbuf, int ifd,
                                struct image_tool_params *params)
{
        FILE *fcfg;
        void *image = NULL;
        int version;
        size_t headersz = 0;
        uint32_t checksum;
        int ret;
        int size;

        fcfg = fopen(params->imagename, "r");
        if (!fcfg) {
                fprintf(stderr, "Could not open input file %s\n",
                        params->imagename);
                exit(EXIT_FAILURE);
        }

        image_cfg = malloc(IMAGE_CFG_ELEMENT_MAX *
                           sizeof(struct image_cfg_element));
        if (!image_cfg) {
                fprintf(stderr, "Cannot allocate memory\n");
                fclose(fcfg);
                exit(EXIT_FAILURE);
        }

        memset(image_cfg, 0,
               IMAGE_CFG_ELEMENT_MAX * sizeof(struct image_cfg_element));
        rewind(fcfg);

        ret = image_create_config_parse(fcfg);
        fclose(fcfg);
        if (ret) {
                free(image_cfg);
                exit(EXIT_FAILURE);
        }

        /* The MVEBU BootROM does not allow non word aligned payloads */
        sbuf->st_size = ALIGN_SUP(sbuf->st_size, 4);

        version = image_get_version();
        switch (version) {
                /*
                 * Fallback to version 0 if no version is provided in the
                 * cfg file
                 */
        case -1:
        case 0:
                image = image_create_v0(&headersz, params, sbuf->st_size);
                break;

        case 1:
                image = image_create_v1(&headersz, params, sbuf->st_size);
                break;

        default:
                fprintf(stderr, "Unsupported version %d\n", version);
                free(image_cfg);
                exit(EXIT_FAILURE);
        }

        if (!image) {
                fprintf(stderr, "Could not create image\n");
                free(image_cfg);
                exit(EXIT_FAILURE);
        }

        free(image_cfg);

        /* Build and add image checksum header */
        checksum =
                cpu_to_le32(image_checksum32((uint32_t *)ptr, sbuf->st_size));
        size = write(ifd, &checksum, sizeof(uint32_t));
        if (size != sizeof(uint32_t)) {
                fprintf(stderr, "Error:%s - Checksum write %d bytes %s\n",
                        params->cmdname, size, params->imagefile);
                exit(EXIT_FAILURE);
        }

        sbuf->st_size += sizeof(uint32_t);

        /* Finally copy the header into the image area */
        memcpy(ptr, image, headersz);

        free(image);
}

static void kwbimage_print_header(const void *ptr)
{
        struct main_hdr_v0 *mhdr = (struct main_hdr_v0 *)ptr;

        printf("Image Type:   MVEBU Boot from %s Image\n",
               image_boot_mode_name(mhdr->blockid));
        printf("Image version:%d\n", image_version((void *)ptr));
        printf("Data Size:    ");
        genimg_print_size(mhdr->blocksize - sizeof(uint32_t));
        printf("Load Address: %08x\n", mhdr->destaddr);
        printf("Entry Point:  %08x\n", mhdr->execaddr);
}

static int kwbimage_check_image_types(uint8_t type)
{
        if (type == IH_TYPE_KWBIMAGE)
                return EXIT_SUCCESS;
        else
                return EXIT_FAILURE;
}

static int kwbimage_verify_header(unsigned char *ptr, int image_size,
                                  struct image_tool_params *params)
{
        struct main_hdr_v0 *main_hdr;
        struct ext_hdr_v0 *ext_hdr;
        uint8_t checksum;

        main_hdr = (void *)ptr;
        checksum = image_checksum8(ptr,
                                   sizeof(struct main_hdr_v0)
                                   - sizeof(uint8_t));
        if (checksum != main_hdr->checksum)
                return -FDT_ERR_BADSTRUCTURE;

        /* Only version 0 extended header has checksum */
        if (image_version((void *)ptr) == 0) {
                ext_hdr = (void *)ptr + sizeof(struct main_hdr_v0);
                checksum = image_checksum8(ext_hdr,
                                           sizeof(struct ext_hdr_v0)
                                           - sizeof(uint8_t));
                if (checksum != ext_hdr->checksum)
                        return -FDT_ERR_BADSTRUCTURE;
        }

        return 0;
}

static int kwbimage_generate(struct image_tool_params *params,
                             struct image_type_params *tparams)
{
        int alloc_len;
        void *hdr;
        int version = 0;

        version = image_version_file(params->imagename);
        if (version == 0) {
                alloc_len = sizeof(struct main_hdr_v0) +
                        sizeof(struct ext_hdr_v0);
        } else {
                alloc_len = image_headersz_v1(params, NULL);
        }

        hdr = malloc(alloc_len);
        if (!hdr) {
                fprintf(stderr, "%s: malloc return failure: %s\n",
                        params->cmdname, strerror(errno));
                exit(EXIT_FAILURE);
        }

        memset(hdr, 0, alloc_len);
        tparams->header_size = alloc_len;
        tparams->hdr = hdr;

        /*
         * The resulting image needs to be 4-byte aligned. At least
         * the Marvell hdrparser tool complains if its unaligned.
         * By returning 1 here in this function, called via
         * tparams->vrec_header() in mkimage.c, mkimage will
         * automatically pad the the resulting image to a 4-byte
         * size if necessary.
         */
        return 1;
}

/*
 * Report Error if xflag is set in addition to default
 */
static int kwbimage_check_params(struct image_tool_params *params)
{
        if (!strlen(params->imagename)) {
                fprintf(stderr, "Error:%s - Configuration file not specified, "
                        "it is needed for kwbimage generation\n",
                        params->cmdname);
                return CFG_INVALID;
        }

        return (params->dflag && (params->fflag || params->lflag)) ||
                (params->fflag && (params->dflag || params->lflag)) ||
                (params->lflag && (params->dflag || params->fflag)) ||
                (params->xflag) || !(strlen(params->imagename));
}

/*
 * kwbimage type parameters definition
 */
U_BOOT_IMAGE_TYPE(
        kwbimage,
        "Marvell MVEBU Boot Image support",
        0,
        NULL,
        kwbimage_check_params,
        kwbimage_verify_header,
        kwbimage_print_header,
        kwbimage_set_header,
        NULL,
        kwbimage_check_image_types,
        NULL,
        kwbimage_generate
);