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.
 *
 *
 * $Id$
 */

#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/io.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(unsigned char 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 unsigned char *bios = flash->virt_addr;
	unsigned char id1, id2;
	size_t size = flash->total_size * 1024;
	/* Issue JEDEC Product ID Entry command */
	*(volatile char *) (bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile char *) (bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile char *) (bios + 0x5555) = 0x90;
	myusec_delay(10);

	/* Read product ID */
	id1 = *(volatile unsigned char *) bios;
	id2 = *(volatile unsigned char *) (bios + 0x01);

	/* Issue JEDEC Product ID Exit command */
	*(volatile char *) (bios + 0x5555) = 0xAA;
	myusec_delay(10);
	*(volatile char *) (bios + 0x2AAA) = 0x55;
	myusec_delay(10);
	*(volatile char *) (bios + 0x5555) = 0xF0;
	myusec_delay(10);

	printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
	if (id1 != flash->manufacture_id || id2 != flash->model_id)
		return 0;

	myusec_delay(10);

	// we need to mmap the write-protect space. 
	printf("mapping control register at %x\n", 0 - 0x400000 -size);
	bios = mmap(0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
		    flash->fd_mem, (off_t) (0 - 0x400000 - size));
	if (bios == MAP_FAILED) {
		// it's this part but we can't map it ...
		perror("Error MMAP /dev/mem");
		exit(1);
	}

	flash->virt_addr_2 = bios;
	return 1;
}

unsigned char wait_sst_fwhub(volatile unsigned char *bios)
{
	toggle_ready_jedec(bios);
	return 0;
}

int erase_sst_fwhub_block(struct flashchip *flash, int offset)
{
	volatile unsigned char *bios = flash->virt_addr + offset;
	volatile unsigned char *wrprotect =
	    flash->virt_addr_2 + offset + 2;
	unsigned char status;

	// clear status register
	printf("Erase at %p\n", bios);
	// clear write protect
	printf("write protect is at %p\n", (wrprotect));
	printf("write protect is 0x%x\n", *(wrprotect));
	*(wrprotect) = 0;
	printf("write protect is 0x%x\n", *(wrprotect));

	erase_block_jedec(flash->virt_addr, offset);
	status = wait_sst_fwhub(flash->virt_addr);
	//print_sst_fwhub_status(status);
	printf("DONE BLOCK 0x%x\n", offset);
	return (0);
}

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

	printf("total_size is %d; flash->page_size is %d\n",
	       total_size, flash->page_size);
	for (i = 0; i < total_size; i += flash->page_size)
		erase_sst_fwhub_block(flash, i);
	printf("DONE ERASE\n");
	return (0);
}

void write_page_sst_fwhub(volatile char *bios, char *src,
			  volatile char *dst, int page_size)
{
	int i;

	for (i = 0; i < page_size; i++) {
		/* transfer data from source to destination */
		write_byte_program_jedec(bios, src, dst);
		src++;
		dst++;
	}

}

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

	erase_sst_fwhub(flash);
	if (*bios != 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_page_sst_fwhub(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");
	protect_sst_fwhub(bios);
	return (0);
}