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Andrew Ipf0126ce2002-10-16 06:58:05 +00001/*
2 * w49f002u.c: driver for Winbond 49F002U flash models
3 *
4 *
5 * Copyright 2000 Silicon Integrated System Corporation
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 *
22 * Reference:
23 * W49F002U data sheet
24 *
Ollie Lhocec28792004-03-17 23:03:37 +000025 * $Id$
Andrew Ipf0126ce2002-10-16 06:58:05 +000026 */
27
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000028#include <stdio.h>
Andrew Ipf0126ce2002-10-16 06:58:05 +000029#include "flash.h"
30#include "jedec.h"
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000031#include "w49f002u.h"
Andrew Ipf0126ce2002-10-16 06:58:05 +000032
33int probe_49f002 (struct flashchip * flash)
34{
35 volatile char * bios = flash->virt_addr;
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000036 unsigned char id1, id2;
Andrew Ipf0126ce2002-10-16 06:58:05 +000037
Ollie Lhocec28792004-03-17 23:03:37 +000038 *(volatile char *) (bios + 0x5555) = 0xAA;
39 *(volatile char *) (bios + 0x2AAA) = 0x55;
40 *(volatile char *) (bios + 0x5555) = 0x90;
Andrew Ipf0126ce2002-10-16 06:58:05 +000041
42 id1 = *(volatile unsigned char *) bios;
43 id2 = *(volatile unsigned char *) (bios + 0x01);
Ollie Lhocec28792004-03-17 23:03:37 +000044
45 *(volatile char *) (bios + 0x5555) = 0xAA;
46 *(volatile char *) (bios + 0x2AAA) = 0x55;
47 *(volatile char *) (bios + 0x5555) = 0xF0;
Andrew Ipf0126ce2002-10-16 06:58:05 +000048
49 myusec_delay(10);
50
Ronald G. Minnichd4228fd2003-02-28 17:21:38 +000051 printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
52
Andrew Ipf0126ce2002-10-16 06:58:05 +000053 if (id1 == flash->manufacture_id && id2 == flash->model_id)
54 return 1;
55
56 return 0;
57}
58
59int erase_49f002 (struct flashchip * flash)
60{
61 volatile char * bios = flash->virt_addr;
62
Andrew Ipf0126ce2002-10-16 06:58:05 +000063 *(bios + 0x5555) = 0xAA;
64 *(bios + 0x2AAA) = 0x55;
65 *(bios + 0x5555) = 0x80;
66 *(bios + 0x5555) = 0xAA;
67 *(bios + 0x2AAA) = 0x55;
68 *(bios + 0x5555) = 0x10;
69
70 myusec_delay(100);
71 toggle_ready_jedec(bios);
72
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000073 return(0);
Andrew Ipf0126ce2002-10-16 06:58:05 +000074}
75
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000076int write_49f002 (struct flashchip * flash, unsigned char * buf)
Andrew Ipf0126ce2002-10-16 06:58:05 +000077{
Ollie Lhocec28792004-03-17 23:03:37 +000078 int i;
79 int total_size = flash->total_size * 1024;
80 volatile char * bios = flash->virt_addr;
81 volatile char * dst = bios;
Andrew Ipf0126ce2002-10-16 06:58:05 +000082
Ollie Lhocec28792004-03-17 23:03:37 +000083 myusec_delay(10);
84 erase_49f002(flash);
Andrew Ipf0126ce2002-10-16 06:58:05 +000085
Ollie Lhocec28792004-03-17 23:03:37 +000086 printf ("Programming Page: ");
87 for (i = 0; i < total_size; i++) {
88 /* write to the sector */
89 if ((i & 0xfff) == 0)
90 printf ("address: 0x%08lx", (unsigned long)i);
91 *(bios + 0x5555) = 0xAA;
92 *(bios + 0x2AAA) = 0x55;
93 *(bios + 0x5555) = 0xA0;
94 *dst++ = *buf++;
Andrew Ipf0126ce2002-10-16 06:58:05 +000095
Ollie Lhocec28792004-03-17 23:03:37 +000096 /* wait for Toggle bit ready */
97 toggle_ready_jedec(dst);
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000098
Ollie Lhocec28792004-03-17 23:03:37 +000099 if ((i & 0xfff) == 0)
100 printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
101 }
102 printf("\n");
103
104 return(0);
Andrew Ipf0126ce2002-10-16 06:58:05 +0000105}