sst_fwhub.c

/*
 * adapted from the Intel FW hub stuff for 82802ax parts. 
 *
 *
 * Copyright 2000 Silicon Integrated System Corporation
 *
 *	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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

#include "flash.h"
#include "jedec.h"
#include "sst_fwhub.h"

// I need that Berkeley bit-map printer
void print_sst_fwhub_status(uint8_t status)
{
	printf("%s", status & 0x80 ? "Ready:" : "Busy:");
	printf("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:");
	printf("%s", status & 0x20 ? "BE ERROR:" : "BE OK:");
	printf("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:");
	printf("%s", status & 0x8 ? "VP ERR:" : "VPP OK:");
	printf("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:");
	printf("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:");
}

/* probe_jedec works fine for probing */
int probe_sst_fwhub(struct flashchip *flash)
{
	volatile uint8_t *registers;
	size_t size = flash->total_size * 1024;

	if (probe_jedec(flash) == 0)
		return 0;

	registers = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
		    fd_mem, (off_t) (0xFFFFFFFF - 0x400000 - size + 1));
	if (registers == MAP_FAILED) {
		// it's this part but we can't map it ...
		perror("Error MMAP /dev/mem");
		exit(1);
	}

	flash->virtual_registers = registers;
	return 1;
}

int erase_sst_fwhub_block(struct flashchip *flash, int offset)
{
	volatile uint8_t *wrprotect = flash->virtual_registers + offset + 2;

	// clear write protect
	*(wrprotect) = 0;

	erase_block_jedec(flash->virtual_memory, offset);
	toggle_ready_jedec(flash->virtual_memory);

	return (0);
}

int erase_sst_fwhub(struct flashchip *flash)
{
	int i;
	unsigned int total_size = flash->total_size * 1024;

	for (i = 0; i < total_size; i += flash->page_size)
		erase_sst_fwhub_block(flash, i);
	return (0);
}

int write_sst_fwhub(struct flashchip *flash, uint8_t *buf)
{
	int i;
	int total_size = flash->total_size * 1024;
	int page_size = flash->page_size;
	volatile uint8_t *bios = flash->virtual_memory;

	// FIXME: We want block wide erase instead of ironing the whole chip
	erase_sst_fwhub(flash);

	// dumb check if erase was successful.
	for (i = 0; i < total_size; i++) {
		if (bios[i] != 0xff) {
			printf("ERASE FAILED\n");
			return -1;
		}
	}

	printf("Programming Page: ");
	for (i = 0; i < total_size / page_size; i++) {
		printf("%04d at address: 0x%08x", i, i * page_size);
		write_sector_jedec(bios, buf + i * page_size,
				   bios + i * page_size, page_size);
		printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
	}
	printf("\n");
	return (0);
}