2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #define PHYS_FLASH_1 CONFIG_SYS_FLASH_BASE
27 #define FLASH_BANK_SIZE 0x200000
29 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
31 void flash_print_info (flash_info_t * info)
35 switch (info->flash_id & FLASH_VENDMASK) {
36 case (AMD_MANUFACT & FLASH_VENDMASK):
40 printf ("Unknown Vendor ");
44 switch (info->flash_id & FLASH_TYPEMASK) {
45 case (AMD_ID_PL160CB & FLASH_TYPEMASK):
46 printf ("AM29PL160CB (16Mbit)\n");
49 printf ("Unknown Chip Type\n");
54 printf (" Size: %ld MB in %d Sectors\n",
55 info->size >> 20, info->sector_count);
57 printf (" Sector Start Addresses:");
58 for (i = 0; i < info->sector_count; i++) {
62 printf (" %08lX%s", info->start[i],
63 info->protect[i] ? " (RO)" : " ");
72 unsigned long flash_init (void)
77 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
80 flash_info[i].flash_id =
81 (AMD_MANUFACT & FLASH_VENDMASK) |
82 (AMD_ID_PL160CB & FLASH_TYPEMASK);
83 flash_info[i].size = FLASH_BANK_SIZE;
84 flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
85 memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
87 flashbase = PHYS_FLASH_1;
89 panic ("configured to many flash banks!\n");
91 for (j = 0; j < flash_info[i].sector_count; j++) {
94 flash_info[i].start[j] = flashbase;
96 if ((j >= 1) && (j <= 2)) {
97 /* 2nd and 3rd are 8 KiB */
98 flash_info[i].start[j] =
99 flashbase + 0x4000 + 0x2000 * (j - 1);
103 flash_info[i].start[j] = flashbase + 0x8000;
105 if ((j >= 4) && (j <= 10)) {
106 /* rest is 256 KiB */
107 flash_info[i].start[j] =
108 flashbase + 0x40000 + 0x40000 * (j -
112 size += flash_info[i].size;
115 flash_protect (FLAG_PROTECT_SET,
116 CONFIG_SYS_FLASH_BASE,
117 CONFIG_SYS_FLASH_BASE + 0x3ffff, &flash_info[0]);
123 #define CMD_READ_ARRAY 0x00F0
124 #define CMD_UNLOCK1 0x00AA
125 #define CMD_UNLOCK2 0x0055
126 #define CMD_ERASE_SETUP 0x0080
127 #define CMD_ERASE_CONFIRM 0x0030
128 #define CMD_PROGRAM 0x00A0
129 #define CMD_UNLOCK_BYPASS 0x0020
131 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555<<1)))
132 #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA<<1)))
134 #define BIT_ERASE_DONE 0x0080
135 #define BIT_RDY_MASK 0x0080
136 #define BIT_PROGRAM_ERROR 0x0020
137 #define BIT_TIMEOUT 0x80000000 /* our flag */
144 int flash_erase (flash_info_t * info, int s_first, int s_last)
147 int iflag, cflag, prot, sect;
152 /* first look for protection bits */
154 if (info->flash_id == FLASH_UNKNOWN)
155 return ERR_UNKNOWN_FLASH_TYPE;
157 if ((s_first < 0) || (s_first > s_last)) {
161 if ((info->flash_id & FLASH_VENDMASK) !=
162 (AMD_MANUFACT & FLASH_VENDMASK)) {
163 return ERR_UNKNOWN_FLASH_VENDOR;
167 for (sect = s_first; sect <= s_last; ++sect) {
168 if (info->protect[sect]) {
173 return ERR_PROTECTED;
176 * Disable interrupts which might cause a timeout
177 * here. Remember that our exception vectors are
178 * at address 0 in the flash, and we don't want a
179 * (ticker) exception to happen while the flash
180 * chip is in programming mode.
183 cflag = icache_status ();
185 iflag = disable_interrupts ();
189 /* Start erase on unprotected sectors */
190 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
191 printf ("Erasing sector %2d ... ", sect);
193 /* arm simple, non interrupt dependent timer */
194 start = get_timer(0);
196 if (info->protect[sect] == 0) { /* not protected */
198 (volatile u16 *) (info->start[sect]);
200 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
201 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
202 MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
204 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
205 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
206 *addr = CMD_ERASE_CONFIRM;
208 /* wait until flash is ready */
215 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
216 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
222 && (result & 0xFFFF) & BIT_ERASE_DONE)
227 MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
239 } else { /* it was protected */
241 printf ("protected!\n");
246 printf ("User Interrupt!\n");
249 /* allow flash to settle - wait 10 ms */
253 enable_interrupts ();
261 static int write_word (flash_info_t * info, ulong dest, ulong data)
263 volatile u16 *addr = (volatile u16 *) dest;
271 * Check if Flash is (sufficiently) erased
274 if ((result & data) != data)
275 return ERR_NOT_ERASED;
279 * Disable interrupts which might cause a timeout
280 * here. Remember that our exception vectors are
281 * at address 0 in the flash, and we don't want a
282 * (ticker) exception to happen while the flash
283 * chip is in programming mode.
286 cflag = icache_status ();
288 iflag = disable_interrupts ();
290 MEM_FLASH_ADDR1 = CMD_UNLOCK1;
291 MEM_FLASH_ADDR2 = CMD_UNLOCK2;
292 MEM_FLASH_ADDR1 = CMD_PROGRAM;
295 /* arm simple, non interrupt dependent timer */
296 start = get_timer(0);
298 /* wait until flash is ready */
304 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
308 if (!chip1 && ((result & 0x80) == (data & 0x80)))
313 *addr = CMD_READ_ARRAY;
315 if (chip1 == ERR || *addr != data)
319 enable_interrupts ();
328 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
334 printf ("unaligned destination not supported\n");
340 printf ("odd transfer sizes not supported\n");
348 data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
350 if ((rc = write_word (info, wp - 1, data)) != 0) {
359 data = *((volatile u16 *) src);
360 if ((rc = write_word (info, wp, data)) != 0) {
369 data = (*((volatile u8 *) src) << 8) |
370 *((volatile u8 *) (wp + 1));
371 if ((rc = write_word (info, wp, data)) != 0) {