/*
 * In this module we are going to implement the flash operation commands
 * of fc-loadtool.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include "flash.h"

/* S{29,71}PL129N device description */

static struct flash_region_desc pl129n_ce1_regions[] = {
	/* 4 sectors of 64 KiB each at the beginning, then 256 KiB sectors */
	{0x10000, 4},
	{0x40000, 31},
	{0, 0}		/* array terminator */
};

static struct flash_region_desc pl129n_ce2_regions[] = {
	/* the other way around now */
	{0x40000, 31},
	{0x10000, 4},
	{0, 0}		/* array terminator */
};

static struct flash_bank_desc pl129n_banks[2] = {
	{pl129n_ce1_regions, 0xFFFC0000},
	{pl129n_ce2_regions, 0xFFFC0000}
};

/* list of supported flash devices */

struct flash_device_desc flash_device_list[] = {
	{"pl129n", pl129n_banks, 2},
	{0, 0, 0}	/* array terminator */
};

/* the following variables describe our selected flash device */

struct flash_device_desc *selected_flash_device;
struct flash_bank_info flash_bank_info[2];

/* called from hwparam.c config file parser */
void
set_flash_device(arg, filename_for_errs, lineno_for_errs)
	char *arg;
	char *filename_for_errs;
	int lineno_for_errs;
{
	char *cp, *np, *ep;
	struct flash_device_desc *tp;
	int bank;
	struct flash_bank_info *bi;

	if (selected_flash_device) {
		fprintf(stderr, "%s line %d: duplicate flash setting\n",
			filename_for_errs, lineno_for_errs);
		exit(1);
	}
	for (cp = arg; isspace(*cp); cp++)
		;
	if (!*cp || *cp == '#') {
too_few_arg:	fprintf(stderr,
			"%s line %d: flash setting: too few arguments\n",
			filename_for_errs, lineno_for_errs);
		exit(1);
	}
	for (np = cp; *cp && !isspace(*cp); cp++)
		;
	if (*cp)
		*cp++ = '\0';
	for (tp = flash_device_list; tp->name; tp++)
		if (!strcmp(tp->name, np))
			break;
	if (!tp->name) {
		fprintf(stderr,
			"%s line %d: unknown flash device \"%s\"\n",
			filename_for_errs, lineno_for_errs, np);
		exit(1);
	}
	selected_flash_device = tp;

	/* now initialize flash_bank_info */
	for (bank = 0; bank < selected_flash_device->nbanks; bank++) {
		while (isspace(*cp))
			cp++;
		if (!*cp || *cp == '#')
			goto too_few_arg;
		for (np = cp; *cp && !isspace(*cp); cp++)
			;
		if (*cp)
			*cp++ = '\0';
		bi = flash_bank_info + bank;
		bi->base_addr = strtoul(np, &ep, 16);
		if (*ep) {
			fprintf(stderr,
"%s line %d: syntax error (base addr expected after flash device type)\n",
				filename_for_errs, lineno_for_errs);
			exit(1);
		}
		/* the rest comes from the flash device type */
		bi->bank_desc = selected_flash_device->bank_desc + bank;
		compute_flash_totsize_nsecs(bank);
		if (count_ones(bi->total_size) != 1) {
			fprintf(stderr,
"fc-loadtool internal bug: flash bank %d size for %s is not a power of 2\n",
				bank, selected_flash_device->name);
			exit(1);
		}
		if (bi->base_addr & (bi->total_size - 1)) {
			fprintf(stderr,
"%s line %d: flash bank %d base addr is not aligned to the bank size (0x%lx)\n",
				filename_for_errs, lineno_for_errs, bank,
				(u_long) bi->total_size);
			exit(1);
		}
	}
	while (isspace(*cp))
		cp++;
	if (*cp && *cp != '#') {
		fprintf(stderr,
			"%s line %d: flash setting: too many arguments\n",
			filename_for_errs, lineno_for_errs);
		exit(1);
	}
}

flashcmd_blankchk(argc, argv, bank)
	char **argv;
{
	printf("To be implemented\n");
	return(1);
}

flashcmd_dump2file(argc, argv, bank)
	char **argv;
{
	struct flash_bank_info *bi;
	u_long offset, dumplen, maxlen;
	char *strtoul_endp;
	int format;

	if (argc < 3 || argc > 5) {
inv:		fprintf(stderr, "usage: %s %s outfile [offset [length]]\n",
			argv[0], argv[1]);
		return(-1);
	}
	bi = flash_bank_info + bank;
	if (argc >= 4) {
		offset = strtoul(argv[3], &strtoul_endp, 16);
		if (*strtoul_endp)
			goto inv;
		if (offset >= bi->total_size) {
			fprintf(stderr,
		"error: specified offset exceeds flash bank size (0x%lx)\n",
				(u_long) bi->total_size);
			return(-1);
		}
	} else
		offset = 0;
	maxlen = bi->total_size - offset;
	if (argc >= 5) {
		dumplen = strtoul(argv[4], &strtoul_endp, 16);
		if (*strtoul_endp)
			goto inv;
		if (dumplen > maxlen) {
			fprintf(stderr,
	"error: specified offset+length exceed flash bank size (0x%lx)\n",
				(u_long) bi->total_size);
			return(-1);
		}
	} else
		dumplen = maxlen;
	switch (argv[1][5]) {
	case 'b':
		format = 0;
		break;
	case 's':
		format = 1;
		break;
	default:
		fprintf(stderr,
			"internal bug: bad format in flashcmd_dump2file()\n");
		return(-1);
	}
	return loadtool_memdump(bi->base_addr + offset, dumplen, argv[2],
				format);
}

flashcmd_info(argc, argv, bank)
	char **argv;
{
	struct flash_bank_info *bi;

	if (argc > 2) {
		fprintf(stderr, "error: too many arguments\n");
		return(-1);
	}
	bi = flash_bank_info + bank;
	printf("Flash device type: %s\n", selected_flash_device->name);
	printf("Bank %d base address: %08lX\n", bank, (u_long) bi->base_addr);
	printf("Bank %d total size: %lx\n", bank, (u_long) bi->total_size);
	printf("Sectors in bank %d: %u\n", bank, bi->nsectors);
	if (selected_flash_device->nbanks == 2 && !bank)
	    printf("\nFlash device has 2 banks; flash2 command available\n");
	return(0);
}

static struct cmdtab {
	char *cmd;
	int (*func)();
} cmdtab[] = {
	{"blankchk", flashcmd_blankchk},
	{"dump2bin", flashcmd_dump2file},
	{"dump2srec", flashcmd_dump2file},
	{"info", flashcmd_info},
	{0, 0}
};

cmd_flash(argc, argv)
	char **argv;
{
	int bank;
	struct cmdtab *tp;

	if (!selected_flash_device) {
		fprintf(stderr, "No flash configuration defined\n");
		return(-1);
	}
	if (argv[0][5] == '2') {
		if (selected_flash_device->nbanks < 2) {
			fprintf(stderr, "Flash device %s has only one bank\n",
				selected_flash_device->name);
			return(-1);
		}
		bank = 1;
	} else
		bank = 0;
	for (tp = cmdtab; tp->cmd; tp++)
		if (!strcmp(tp->cmd, argv[1]))
			break;
	if (!tp->func) {
		fprintf(stderr, "%s %s: unknown/unimplemented subcommand\n",
			argv[0], argv[1]);
		return(-1);
	}
	return tp->func(argc, argv, bank);
}