2 * jedec.c: driver for programming JEDEC standard flash parts
5 * Copyright 2000 Silicon Integrated System Corporation
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.
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.
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.
31 int probe_jedec(struct flashchip *flash)
33 volatile unsigned char *bios = flash->virt_addr;
34 unsigned char id1, id2;
36 /* Issue JEDEC Product ID Entry command */
37 *(volatile char *) (bios + 0x5555) = 0xAA;
39 *(volatile char *) (bios + 0x2AAA) = 0x55;
41 *(volatile char *) (bios + 0x5555) = 0x90;
45 id1 = *(volatile unsigned char *) bios;
46 id2 = *(volatile unsigned char *) (bios + 0x01);
48 /* Issue JEDEC Product ID Exit command */
49 *(volatile char *) (bios + 0x5555) = 0xAA;
51 *(volatile char *) (bios + 0x2AAA) = 0x55;
53 *(volatile char *) (bios + 0x5555) = 0xF0;
56 printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
57 if (id1 == flash->manufacture_id && id2 == flash->model_id)
63 int erase_sector_jedec(volatile unsigned char *bios, unsigned int page)
65 volatile unsigned char *Temp;
67 /* Issue the Sector Erase command */
68 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
69 *Temp = 0xAA; /* write data 0xAA to the address */
71 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
72 *Temp = 0x55; /* write data 0x55 to the address */
74 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
75 *Temp = 0x80; /* write data 0x80 to the address */
77 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
78 *Temp = 0xAA; /* write data 0xAA to the address */
80 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
81 *Temp = 0x55; /* write data 0x55 to the address */
83 Temp = bios + page; /* set up address to be the current sector */
84 *Temp = 0x30; /* write data 0x30 to the address */
87 /* wait for Toggle bit ready */
88 toggle_ready_jedec(bios);
92 int erase_block_jedec(volatile unsigned char *bios, unsigned int block)
94 volatile unsigned char *Temp;
96 /* Issue the Sector Erase command */
97 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
98 *Temp = 0xAA; /* write data 0xAA to the address */
100 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
101 *Temp = 0x55; /* write data 0x55 to the address */
103 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
104 *Temp = 0x80; /* write data 0x80 to the address */
106 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
107 *Temp = 0xAA; /* write data 0xAA to the address */
109 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
110 *Temp = 0x55; /* write data 0x55 to the address */
112 Temp = bios + block; /* set up address to be the current sector */
113 *Temp = 0x50; /* write data 0x30 to the address */
116 /* wait for Toggle bit ready */
117 toggle_ready_jedec(bios);
122 int erase_chip_jedec(struct flashchip *flash)
124 volatile unsigned char *bios = flash->virt_addr;
125 volatile unsigned char *Temp;
127 /* Issue the JEDEC Chip Erase command */
128 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
129 *Temp = 0xAA; /* write data 0xAA to the address */
131 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
132 *Temp = 0x55; /* write data 0x55 to the address */
134 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
135 *Temp = 0x80; /* write data 0x80 to the address */
137 Temp = bios + 0x5555; /* set up address to be BASE:5555h */
138 *Temp = 0xAA; /* write data 0xAA to the address */
140 Temp = bios + 0x2AAA; /* set up address to be BASE:2AAAh */
141 *Temp = 0x55; /* write data 0x55 to the address */
143 Temp = bios + 0x5555; /* set up address to be BASEy:5555h */
144 *Temp = 0x10; /* write data 0x10 to the address */
147 toggle_ready_jedec(bios);
152 void write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
153 volatile unsigned char *dst, int page_size)
157 /* Issue JEDEC Data Unprotect comand */
158 *(volatile char *) (bios + 0x5555) = 0xAA;
159 *(volatile char *) (bios + 0x2AAA) = 0x55;
160 *(volatile char *) (bios + 0x5555) = 0xA0;
162 for (i = 0; i < page_size; i++) {
163 /* transfer data from source to destination */
168 toggle_ready_jedec(dst - 1);
171 int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src,
172 volatile unsigned char *dst)
174 volatile unsigned char *Temp;
176 /* transfer data from source to destination */
178 /* If the data is 0xFF, don't program it */
181 /* Issue JEDEC Byte Program command */
182 Temp = bios + 0x5555;
184 Temp = bios + 0x2AAA;
186 Temp = bios + 0x5555;
189 toggle_ready_jedec(bios);
194 int write_sector_jedec(volatile unsigned char *bios, unsigned char *src,
195 volatile unsigned char *dst, unsigned int page_size)
199 for (i = 0; i < page_size; i++) {
200 write_byte_program_jedec(bios, src, dst);
207 int write_jedec(struct flashchip *flash, unsigned char *buf)
210 int total_size = flash->total_size * 1024;
211 int page_size = flash->page_size;
212 volatile unsigned char *bios = flash->virt_addr;
214 erase_chip_jedec(flash);
215 if (*bios != (unsigned char) 0xff) {
216 printf("ERASE FAILED\n");
219 printf("Programming Page: ");
220 for (i = 0; i < total_size / page_size; i++) {
221 printf("%04d at address: 0x%08x", i, i * page_size);
222 write_page_write_jedec(bios, buf + i * page_size,
223 bios + i * page_size, page_size);
224 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");