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Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +00001/*
2 * mx29f002.c: driver for MXIC MX29F002 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 * MX29F002/002N data sheet
24 *
25 * $Id$
26 */
27
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000028#include <stdio.h>
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000029#include "flash.h"
30#include "jedec.h"
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000031#include "mx29f002.h"
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000032
Ollie Lho761bf1b2004-03-20 16:46:10 +000033int probe_29f002(struct flashchip *flash)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000034{
Ollie Lho761bf1b2004-03-20 16:46:10 +000035 volatile char *bios = flash->virt_addr;
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +000036 unsigned char id1, id2;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000037
38 *(bios + 0x5555) = 0xAA;
39 *(bios + 0x2AAA) = 0x55;
40 *(bios + 0x5555) = 0x90;
Ollie Lho761bf1b2004-03-20 16:46:10 +000041
Ronald G. Minnichef5779d2002-01-29 20:18:02 +000042 id1 = *(volatile unsigned char *) bios;
43 id2 = *(volatile unsigned char *) (bios + 0x01);
Ollie Lho761bf1b2004-03-20 16:46:10 +000044
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000045 *bios = 0xF0;
46
Ronald G. Minnichef5779d2002-01-29 20:18:02 +000047 myusec_delay(10);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000048
Ronald G. Minnich4572a822003-02-11 16:09:12 +000049 printf("%s: id1 %d, id2 %d\n", __FUNCTION__, id1, id2);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000050 if (id1 == flash->manufacture_id && id2 == flash->model_id)
51 return 1;
52
53 return 0;
54}
55
Ollie Lho761bf1b2004-03-20 16:46:10 +000056int erase_29f002(struct flashchip *flash)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000057{
Ollie Lho761bf1b2004-03-20 16:46:10 +000058 volatile char *bios = flash->virt_addr;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000059
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000060 *(bios + 0x555) = 0xF0;
61 *(bios + 0x555) = 0xAA;
62 *(bios + 0x2AA) = 0x55;
63 *(bios + 0x555) = 0x80;
64 *(bios + 0x555) = 0xAA;
65 *(bios + 0x2AA) = 0x55;
66 *(bios + 0x555) = 0x10;
67
Ronald G. Minnichef5779d2002-01-29 20:18:02 +000068 myusec_delay(100);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000069 toggle_ready_jedec(bios);
70
71 // while ((*bios & 0x40) != 0x40)
72 //;
73
74#if 0
75 toggle_ready_jedec(bios);
76 *(bios + 0x0ffff) = 0x30;
77 *(bios + 0x1ffff) = 0x30;
78 *(bios + 0x2ffff) = 0x30;
79 *(bios + 0x37fff) = 0x30;
80 *(bios + 0x39fff) = 0x30;
81 *(bios + 0x3bfff) = 0x30;
82#endif
83
Ollie Lho761bf1b2004-03-20 16:46:10 +000084 return (0);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000085}
86
Ollie Lho761bf1b2004-03-20 16:46:10 +000087int write_29f002(struct flashchip *flash, unsigned char *buf)
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000088{
Ollie Lho761bf1b2004-03-20 16:46:10 +000089 int i;
90 int total_size = flash->total_size * 1024;
91 volatile char *bios = flash->virt_addr;
92 volatile char *dst = bios;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000093
Ollie Lho761bf1b2004-03-20 16:46:10 +000094 *bios = 0xF0;
95 myusec_delay(10);
96 erase_29f002(flash);
97 //*bios = 0xF0;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +000098#if 1
Ollie Lho761bf1b2004-03-20 16:46:10 +000099 printf("Programming Page: ");
100 for (i = 0; i < total_size; i++) {
101 /* write to the sector */
102 if ((i & 0xfff) == 0)
103 printf("address: 0x%08lx", (unsigned long) i);
104 *(bios + 0x5555) = 0xAA;
105 *(bios + 0x2AAA) = 0x55;
106 *(bios + 0x5555) = 0xA0;
107 *dst++ = *buf++;
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000108
Ollie Lho761bf1b2004-03-20 16:46:10 +0000109 /* wait for Toggle bit ready */
110 toggle_ready_jedec(dst);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000111
Ollie Lho761bf1b2004-03-20 16:46:10 +0000112 if ((i & 0xfff) == 0)
113 printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
114 }
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000115#endif
Ollie Lho761bf1b2004-03-20 16:46:10 +0000116 printf("\n");
Ronald G. Minnicheaab50b2003-09-12 22:41:53 +0000117
Ollie Lho761bf1b2004-03-20 16:46:10 +0000118 return (0);
Ronald G. Minnich5e5f75e2002-01-29 18:21:41 +0000119}