3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
5 * (C) Copyright 2001-2004
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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,
28 #include <linux/byteorder/swab.h>
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33 /* Board support for 1 or 2 flash devices */
34 #define FLASH_PORT_WIDTH32
35 #undef FLASH_PORT_WIDTH16
37 #ifdef FLASH_PORT_WIDTH16
38 #define FLASH_PORT_WIDTH ushort
39 #define FLASH_PORT_WIDTHV vu_short
42 #define FLASH_PORT_WIDTH ulong
43 #define FLASH_PORT_WIDTHV vu_long
47 /* Intel-compatible flash ID */
48 #define INTEL_COMPAT 0x00890089
49 #define INTEL_ALT 0x00B000B0
51 /* Intel-compatible flash commands */
52 #define INTEL_PROGRAM 0x00100010
53 #define INTEL_ERASE 0x00200020
54 #define INTEL_CLEAR 0x00500050
55 #define INTEL_LOCKBIT 0x00600060
56 #define INTEL_PROTECT 0x00010001
57 #define INTEL_STATUS 0x00700070
58 #define INTEL_READID 0x00900090
59 #define INTEL_CONFIRM 0x00D000D0
60 #define INTEL_RESET 0xFFFFFFFF
62 /* Intel-compatible flash status bits */
63 #define INTEL_FINISHED 0x00800080
64 #define INTEL_OK 0x00800080
66 #define FPW FLASH_PORT_WIDTH
67 #define FPWV FLASH_PORT_WIDTHV
69 #define mb() __asm__ __volatile__ ("" : : : "memory")
71 /*-----------------------------------------------------------------------
74 static ulong flash_get_size (FPW *addr, flash_info_t *info);
75 static int write_data (flash_info_t *info, ulong dest, FPW data);
76 static void flash_get_offsets (ulong base, flash_info_t *info);
77 void inline spin_wheel (void);
79 /*-----------------------------------------------------------------------
82 unsigned long flash_init (void)
86 extern void flash_preinit(void);
87 extern void flash_afterinit(ulong, ulong);
88 ulong flashbase = CFG_FLASH_BASE;
92 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
95 memset(&flash_info[i], 0, sizeof(flash_info_t));
96 flash_get_size ((FPW *) flashbase, &flash_info[i]);
97 flash_get_offsets (flash_info[i].start[0], &flash_info[i]);
100 panic ("configured to many flash banks!\n");
103 size += flash_info[i].size;
106 /* Protect monitor and environment sectors
108 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
109 #ifndef CONFIG_BOOT_ROM
110 flash_protect ( FLAG_PROTECT_SET,
112 CFG_MONITOR_BASE + monitor_flash_len - 1,
117 #ifdef CFG_ENV_IS_IN_FLASH
118 flash_protect ( FLAG_PROTECT_SET,
120 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
123 flash_afterinit(flash_info[0].start[0], flash_info[0].size);
128 /*-----------------------------------------------------------------------
130 static void flash_get_offsets (ulong base, flash_info_t *info)
134 if (info->flash_id == FLASH_UNKNOWN) {
138 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
139 for (i = 0; i < info->sector_count; i++) {
140 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
141 info->protect[i] = 0;
146 /*-----------------------------------------------------------------------
148 void flash_print_info (flash_info_t *info)
152 if (info->flash_id == FLASH_UNKNOWN) {
153 printf ("missing or unknown FLASH type\n");
157 switch (info->flash_id & FLASH_VENDMASK) {
158 case FLASH_MAN_INTEL:
162 printf ("Unknown Vendor ");
166 switch (info->flash_id & FLASH_TYPEMASK) {
167 case FLASH_28F128J3A:
168 printf ("28F128J3A\n");
171 case FLASH_28F640J3A:
172 printf ("28F640J3A\n");
175 case FLASH_28F320J3A:
176 printf ("28F320J3A\n");
180 printf ("Unknown Chip Type\n");
184 printf (" Size: %ld MB in %d Sectors\n",
185 info->size >> 20, info->sector_count);
187 printf (" Sector Start Addresses:");
188 for (i = 0; i < info->sector_count; ++i) {
193 info->protect[i] ? " (RO)" : " ");
200 * The following code cannot be run from FLASH!
202 static ulong flash_get_size (FPW *addr, flash_info_t *info)
206 /* Write auto select command: read Manufacturer ID */
207 addr[0x5555] = (FPW) 0x00AA00AA;
208 addr[0x2AAA] = (FPW) 0x00550055;
209 addr[0x5555] = (FPW) 0x00900090;
218 case (FPW) INTEL_MANUFACT:
219 info->flash_id = FLASH_MAN_INTEL;
223 info->flash_id = FLASH_UNKNOWN;
224 info->sector_count = 0;
226 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
227 return (0); /* no or unknown flash */
231 value = addr[1]; /* device ID */
235 case (FPW) INTEL_ID_28F128J3A:
236 info->flash_id += FLASH_28F128J3A;
237 info->sector_count = 128;
238 info->size = 0x02000000;
239 info->start[0] = CFG_FLASH_BASE;
240 break; /* => 32 MB */
242 case (FPW) INTEL_ID_28F640J3A:
243 info->flash_id += FLASH_28F640J3A;
244 info->sector_count = 64;
245 info->size = 0x01000000;
246 info->start[0] = CFG_FLASH_BASE + 0x01000000;
247 break; /* => 16 MB */
249 case (FPW) INTEL_ID_28F320J3A:
250 info->flash_id += FLASH_28F320J3A;
251 info->sector_count = 32;
252 info->size = 0x800000;
253 info->start[0] = CFG_FLASH_BASE + 0x01800000;
257 info->flash_id = FLASH_UNKNOWN;
261 if (info->sector_count > CFG_MAX_FLASH_SECT) {
262 printf ("** ERROR: sector count %d > max (%d) **\n",
263 info->sector_count, CFG_MAX_FLASH_SECT);
264 info->sector_count = CFG_MAX_FLASH_SECT;
267 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
273 /*-----------------------------------------------------------------------
276 int flash_erase (flash_info_t *info, int s_first, int s_last)
278 int flag, prot, sect;
279 ulong type, start, last;
282 if ((s_first < 0) || (s_first > s_last)) {
283 if (info->flash_id == FLASH_UNKNOWN) {
284 printf ("- missing\n");
286 printf ("- no sectors to erase\n");
291 type = (info->flash_id & FLASH_VENDMASK);
292 if ((type != FLASH_MAN_INTEL)) {
293 printf ("Can't erase unknown flash type %08lx - aborted\n",
299 for (sect = s_first; sect <= s_last; ++sect) {
300 if (info->protect[sect]) {
306 printf ("- Warning: %d protected sectors will not be erased!\n",
312 start = get_timer (0);
315 /* Disable interrupts which might cause a timeout here */
316 flag = disable_interrupts ();
318 /* Start erase on unprotected sectors */
319 for (sect = s_first; sect <= s_last; sect++) {
320 if (info->protect[sect] == 0) { /* not protected */
321 FPWV *addr = (FPWV *) (info->start[sect]);
324 printf ("Erasing sector %2d ... ", sect);
326 /* arm simple, non interrupt dependent timer */
327 start = get_timer(0);
329 *addr = (FPW) 0x00500050; /* clear status register */
330 *addr = (FPW) 0x00200020; /* erase setup */
331 *addr = (FPW) 0x00D000D0; /* erase confirm */
333 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
334 if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
335 printf ("Timeout\n");
336 *addr = (FPW) 0x00B000B0; /* suspend erase */
337 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
343 *addr = 0x00500050; /* clear status register cmd. */
344 *addr = 0x00FF00FF; /* resest to read mode */
352 /*-----------------------------------------------------------------------
353 * Copy memory to flash, returns:
356 * 2 - Flash not erased
357 * 4 - Flash not identified
360 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
364 int count, i, l, rc, port_width;
366 if (info->flash_id == FLASH_UNKNOWN) {
369 /* get lower word aligned address */
370 #ifdef FLASH_PORT_WIDTH16
379 * handle unaligned start bytes
381 if ((l = addr - wp) != 0) {
383 for (i = 0, cp = wp; i < l; ++i, ++cp) {
384 data = (data << 8) | (*(uchar *) cp);
386 for (; i < port_width && cnt > 0; ++i) {
387 data = (data << 8) | *src++;
391 for (; cnt == 0 && i < port_width; ++i, ++cp) {
392 data = (data << 8) | (*(uchar *) cp);
395 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
402 * handle word aligned part
405 while (cnt >= port_width) {
407 for (i = 0; i < port_width; ++i) {
408 data = (data << 8) | *src++;
410 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
415 if (count++ > 0x800) {
426 * handle unaligned tail bytes
429 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
430 data = (data << 8) | *src++;
433 for (; i < port_width; ++i, ++cp) {
434 data = (data << 8) | (*(uchar *) cp);
437 return (write_data (info, wp, SWAP (data)));
440 /*-----------------------------------------------------------------------
441 * Write a word or halfword to Flash, returns:
444 * 2 - Flash not erased
446 static int write_data (flash_info_t *info, ulong dest, FPW data)
448 FPWV *addr = (FPWV *) dest;
453 /* Check if Flash is (sufficiently) erased */
454 if ((*addr & data) != data) {
455 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
458 /* Disable interrupts which might cause a timeout here */
459 flag = disable_interrupts ();
461 *addr = (FPW) 0x00400040; /* write setup */
464 /* arm simple, non interrupt dependent timer */
465 start = get_timer(0);
467 /* wait while polling the status register */
468 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
469 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
470 *addr = (FPW) 0x00FF00FF; /* restore read mode */
475 *addr = (FPW) 0x00FF00FF; /* restore read mode */
480 void inline spin_wheel (void)
483 static char w[] = "\\/-";
485 printf ("\010%c", w[p]);
486 (++p == 3) ? (p = 0) : 0;
489 /*-----------------------------------------------------------------------
490 * Set/Clear sector's lock bit, returns:
492 * 1 - Error (timeout, voltage problems, etc.)
494 int flash_real_protect(flash_info_t *info, long sector, int prot)
499 vu_long *addr = (vu_long *)(info->start[sector]);
500 int flag = disable_interrupts();
502 *addr = INTEL_CLEAR; /* Clear status register */
503 if (prot) { /* Set sector lock bit */
504 *addr = INTEL_LOCKBIT; /* Sector lock bit */
505 *addr = INTEL_PROTECT; /* set */
507 else { /* Clear sector lock bit */
508 *addr = INTEL_LOCKBIT; /* All sectors lock bits */
509 *addr = INTEL_CONFIRM; /* clear */
512 start = get_timer(0);
514 while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
515 if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT) {
516 printf("Flash lock bit operation timed out\n");
522 if (*addr != INTEL_OK) {
523 printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
524 (uint)addr, (uint)*addr);
529 info->protect[sector] = prot;
532 * Clear lock bit command clears all sectors lock bits, so
533 * we have to restore lock bits of protected sectors.
537 for (i = 0; i < info->sector_count; i++)
539 if (info->protect[i])
541 start = get_timer(0);
542 addr = (vu_long *)(info->start[i]);
543 *addr = INTEL_LOCKBIT; /* Sector lock bit */
544 *addr = INTEL_PROTECT; /* set */
545 while ((*addr & INTEL_FINISHED) != INTEL_FINISHED)
547 if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT)
549 printf("Flash lock bit operation timed out\n");
561 *addr = INTEL_RESET; /* Reset to read array mode */