2 * (C) Copyright 2000-2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <asm/immap.h>
31 #ifndef CONFIG_SYS_FLASH_CFI
32 typedef unsigned short FLASH_PORT_WIDTH;
33 typedef volatile unsigned short FLASH_PORT_WIDTHV;
35 #define FPW FLASH_PORT_WIDTH
36 #define FPWV FLASH_PORT_WIDTHV
38 #define FLASH_CYCLE1 0x5555
39 #define FLASH_CYCLE2 0x2aaa
41 #define SYNC __asm__("nop")
43 /*-----------------------------------------------------------------------
47 ulong flash_get_size(FPWV * addr, flash_info_t * info);
48 int flash_get_offsets(ulong base, flash_info_t * info);
49 int write_word(flash_info_t * info, FPWV * dest, u16 data);
50 void inline spin_wheel(void);
52 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
54 ulong flash_init(void)
59 fbase = (ulong) CONFIG_SYS_FLASH_BASE;
60 flash_get_size((FPWV *) fbase, &flash_info[0]);
61 flash_get_offsets((ulong) fbase, &flash_info[0]);
62 fbase += flash_info[0].size;
63 size += flash_info[0].size;
65 /* Protect monitor and environment sectors */
66 flash_protect(FLAG_PROTECT_SET,
67 CONFIG_SYS_MONITOR_BASE,
68 CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
73 int flash_get_offsets(ulong base, flash_info_t * info)
77 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
79 info->start[0] = base;
80 for (k = 0, j = 0; j < CONFIG_SYS_SST_SECT; j++, k++) {
81 info->start[k + 1] = info->start[k] + CONFIG_SYS_SST_SECTSZ;
89 void flash_print_info(flash_info_t * info)
93 switch (info->flash_id & FLASH_VENDMASK) {
98 printf("Unknown Vendor ");
102 switch (info->flash_id & FLASH_TYPEMASK) {
104 printf("SST39VF6401B\n");
107 printf("Unknown Chip Type\n");
111 if (info->size > 0x100000) {
114 printf(" Size: %ld", info->size >> 20);
116 remainder = (info->size % 0x100000);
119 remainder = (int)((float)
120 (((float)remainder / (float)1024) *
122 printf(".%d ", remainder);
125 printf("MB in %d Sectors\n", info->sector_count);
127 printf(" Size: %ld KB in %d Sectors\n",
128 info->size >> 10, info->sector_count);
130 printf(" Sector Start Addresses:");
131 for (i = 0; i < info->sector_count; ++i) {
135 info->start[i], info->protect[i] ? " (RO)" : " ");
141 * The following code cannot be run from FLASH!
143 ulong flash_get_size(FPWV * addr, flash_info_t * info)
147 addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
148 addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
149 addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
151 switch (addr[0] & 0xffff) {
152 case (u8) SST_MANUFACT:
153 info->flash_id = FLASH_MAN_SST;
157 printf("Unknown Flash\n");
158 info->flash_id = FLASH_UNKNOWN;
159 info->sector_count = 0;
162 *addr = (FPW) 0x00F000F0;
163 return (0); /* no or unknown flash */
167 case (u16) SST_ID_xF6401B:
168 info->flash_id += FLASH_SST6401B;
171 info->flash_id = FLASH_UNKNOWN;
175 info->sector_count = 0;
177 info->sector_count = CONFIG_SYS_SST_SECT;
178 info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
181 *addr = (FPWV) 0x00F000F0;
183 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
184 printf("** ERROR: sector count %d > max (%d) **\n",
185 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
186 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
192 int flash_erase(flash_info_t * info, int s_first, int s_last)
195 int flag, prot, sect, count;
196 ulong type, start, last;
197 int rcode = 0, flashtype = 0;
199 if ((s_first < 0) || (s_first > s_last)) {
200 if (info->flash_id == FLASH_UNKNOWN)
201 printf("- missing\n");
203 printf("- no sectors to erase\n");
207 type = (info->flash_id & FLASH_VENDMASK);
214 type = (info->flash_id & FLASH_VENDMASK);
215 printf("Can't erase unknown flash type %08lx - aborted\n",
221 for (sect = s_first; sect <= s_last; ++sect) {
222 if (info->protect[sect]) {
228 printf("- Warning: %d protected sectors will not be erased!\n",
233 flag = disable_interrupts();
235 start = get_timer(0);
238 if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
240 addr = (FPWV *) info->start[0];
242 addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
243 addr[FLASH_CYCLE2] = 0x0055; /* unlock */
244 addr[FLASH_CYCLE1] = 0x0080; /* erase mode */
245 addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
246 addr[FLASH_CYCLE2] = 0x0055; /* unlock */
247 *addr = 0x0030; /* erase chip */
250 start = get_timer(0);
252 while ((*addr & 0x0080) != 0x0080) {
253 if (count++ > 0x10000) {
258 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
260 *addr = 0x00F0; /* reset to read mode */
266 *addr = 0x00F0; /* reset to read mode */
268 printf("\b. done\n");
274 } else if (prot == CONFIG_SYS_SST_SECT) {
279 /* Start erase on unprotected sectors */
280 for (sect = s_first; sect <= s_last; sect++) {
281 if (info->protect[sect] == 0) { /* not protected */
283 addr = (FPWV *) (info->start[sect]);
287 /* arm simple, non interrupt dependent timer */
288 start = get_timer(0);
293 FPWV *base; /* first address in bank */
295 flag = disable_interrupts();
297 base = (FPWV *) (CONFIG_SYS_FLASH_BASE); /* First sector */
299 base[FLASH_CYCLE1] = 0x00AA; /* unlock */
300 base[FLASH_CYCLE2] = 0x0055; /* unlock */
301 base[FLASH_CYCLE1] = 0x0080; /* erase mode */
302 base[FLASH_CYCLE1] = 0x00AA; /* unlock */
303 base[FLASH_CYCLE2] = 0x0055; /* unlock */
304 *addr = 0x0050; /* erase sector */
309 while ((*addr & 0x0080) != 0x0080) {
310 if (get_timer(start) >
311 CONFIG_SYS_FLASH_ERASE_TOUT) {
313 *addr = 0x00F0; /* reset to read mode */
320 *addr = 0x00F0; /* reset to read mode */
323 } /* switch (flashtype) */
334 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
340 if (info->flash_id == FLASH_UNKNOWN)
343 /* get lower word aligned address */
345 port_width = sizeof(FPW);
347 /* handle unaligned start bytes */
349 data = *((FPWV *) wp);
350 data = (data << 8) | *src;
352 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
362 * handle word aligned part
365 data = *((FPWV *) src);
367 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
374 if (count++ > 0x800) {
379 /* handle word aligned part */
381 /* handle word aligned part */
383 data = *((FPWV *) wp);
385 data = (data & 0x00FF) | (*src << 8);
387 if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
393 if (count++ > 0x800) {
405 /*-----------------------------------------------------------------------
406 * Write a word to Flash
407 * A word is 16 bits, whichever the bus width of the flash bank
408 * (not an individual chip) is.
413 * 2 - Flash not erased
415 int write_word(flash_info_t * info, FPWV * dest, u16 data)
419 int res = 0; /* result, assume success */
420 FPWV *base; /* first address in flash bank */
422 /* Check if Flash is (sufficiently) erased */
423 if ((*dest & (u8) data) != (u8) data) {
427 base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
429 /* Disable interrupts which might cause a timeout here */
430 flag = disable_interrupts();
432 base[FLASH_CYCLE1] = (u8) 0x00AA00AA; /* unlock */
433 base[FLASH_CYCLE2] = (u8) 0x00550055; /* unlock */
434 base[FLASH_CYCLE1] = (u8) 0x00A000A0; /* selects program mode */
436 *dest = data; /* start programming the data */
438 /* re-enable interrupts if necessary */
442 start = get_timer(0);
444 /* data polling for D7 */
446 && (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
447 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
448 *dest = (u8) 0x00F000F0; /* reset bank */
453 *dest++ = (u8) 0x00F000F0; /* reset bank */
458 void inline spin_wheel(void)
461 static char w[] = "\\/-";
463 printf("\010%c", w[p]);
464 (++p == 3) ? (p = 0) : 0;