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);
78 static void flash_sync_real_protect (flash_info_t * info);
79 static unsigned char intel_sector_protected (flash_info_t *info, ushort sector);
81 /*-----------------------------------------------------------------------
84 unsigned long flash_init (void)
88 extern void flash_preinit(void);
89 extern void flash_afterinit(ulong, ulong);
90 ulong flashbase = CFG_FLASH_BASE;
94 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
97 memset(&flash_info[i], 0, sizeof(flash_info_t));
98 flash_get_size ((FPW *) flashbase, &flash_info[i]);
99 flash_get_offsets (flash_info[i].start[0], &flash_info[i]);
102 panic ("configured to many flash banks!\n");
105 size += flash_info[i].size;
107 /* get the h/w and s/w protection status in sync */
108 flash_sync_real_protect(&flash_info[i]);
111 /* Protect monitor and environment sectors
113 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
114 #ifndef CONFIG_BOOT_ROM
115 flash_protect ( FLAG_PROTECT_SET,
117 CFG_MONITOR_BASE + monitor_flash_len - 1,
122 #ifdef CFG_ENV_IS_IN_FLASH
123 flash_protect ( FLAG_PROTECT_SET,
125 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
128 flash_afterinit(flash_info[0].start[0], flash_info[0].size);
133 /*-----------------------------------------------------------------------
135 static void flash_get_offsets (ulong base, flash_info_t *info)
139 if (info->flash_id == FLASH_UNKNOWN) {
143 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
144 for (i = 0; i < info->sector_count; i++) {
145 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
150 /*-----------------------------------------------------------------------
152 void flash_print_info (flash_info_t *info)
156 if (info->flash_id == FLASH_UNKNOWN) {
157 printf ("missing or unknown FLASH type\n");
161 switch (info->flash_id & FLASH_VENDMASK) {
162 case FLASH_MAN_INTEL:
166 printf ("Unknown Vendor ");
170 switch (info->flash_id & FLASH_TYPEMASK) {
171 case FLASH_28F256J3A:
172 printf ("28F256J3A\n");
175 case FLASH_28F128J3A:
176 printf ("28F128J3A\n");
179 case FLASH_28F640J3A:
180 printf ("28F640J3A\n");
183 case FLASH_28F320J3A:
184 printf ("28F320J3A\n");
188 printf ("Unknown Chip Type\n");
192 printf (" Size: %ld MB in %d Sectors\n",
193 info->size >> 20, info->sector_count);
195 printf (" Sector Start Addresses:");
196 for (i = 0; i < info->sector_count; ++i) {
201 info->protect[i] ? " (RO)" : " ");
208 * The following code cannot be run from FLASH!
210 static ulong flash_get_size (FPW *addr, flash_info_t *info)
214 /* Write auto select command: read Manufacturer ID */
215 addr[0x5555] = (FPW) 0x00AA00AA;
216 addr[0x2AAA] = (FPW) 0x00550055;
217 addr[0x5555] = (FPW) 0x00900090;
226 case (FPW) INTEL_MANUFACT:
227 info->flash_id = FLASH_MAN_INTEL;
231 info->flash_id = FLASH_UNKNOWN;
232 info->sector_count = 0;
234 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
235 return (0); /* no or unknown flash */
239 value = addr[1]; /* device ID */
243 case (FPW) INTEL_ID_28F256J3A:
244 info->flash_id += FLASH_28F256J3A;
245 /* In U-Boot we support only 32 MB (no bank-switching) */
246 info->sector_count = 256 / 2;
247 info->size = 0x04000000 / 2;
248 info->start[0] = CFG_FLASH_BASE + 0x02000000;
249 break; /* => 32 MB */
251 case (FPW) INTEL_ID_28F128J3A:
252 info->flash_id += FLASH_28F128J3A;
253 info->sector_count = 128;
254 info->size = 0x02000000;
255 info->start[0] = CFG_FLASH_BASE + 0x02000000;
256 break; /* => 32 MB */
258 case (FPW) INTEL_ID_28F640J3A:
259 info->flash_id += FLASH_28F640J3A;
260 info->sector_count = 64;
261 info->size = 0x01000000;
262 info->start[0] = CFG_FLASH_BASE + 0x03000000;
263 break; /* => 16 MB */
265 case (FPW) INTEL_ID_28F320J3A:
266 info->flash_id += FLASH_28F320J3A;
267 info->sector_count = 32;
268 info->size = 0x800000;
269 info->start[0] = CFG_FLASH_BASE + 0x03800000;
273 info->flash_id = FLASH_UNKNOWN;
277 if (info->sector_count > CFG_MAX_FLASH_SECT) {
278 printf ("** ERROR: sector count %d > max (%d) **\n",
279 info->sector_count, CFG_MAX_FLASH_SECT);
280 info->sector_count = CFG_MAX_FLASH_SECT;
283 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
290 * This function gets the u-boot flash sector protection status
291 * (flash_info_t.protect[]) in sync with the sector protection
292 * status stored in hardware.
294 static void flash_sync_real_protect (flash_info_t * info)
298 switch (info->flash_id & FLASH_TYPEMASK) {
300 case FLASH_28F256J3A:
301 case FLASH_28F128J3A:
302 case FLASH_28F640J3A:
303 case FLASH_28F320J3A:
304 for (i = 0; i < info->sector_count; ++i) {
305 info->protect[i] = intel_sector_protected(info, i);
309 /* no h/w protect support */
316 * checks if "sector" in bank "info" is protected. Should work on intel
317 * strata flash chips 28FxxxJ3x in 8-bit mode.
318 * Returns 1 if sector is protected (or timed-out while trying to read
319 * protection status), 0 if it is not.
321 static unsigned char intel_sector_protected (flash_info_t *info, ushort sector)
324 FPWV *lock_conf_addr;
329 * first, wait for the WSM to be finished. The rationale for
330 * waiting for the WSM to become idle for at most
331 * CFG_FLASH_ERASE_TOUT is as follows. The WSM can be busy
332 * because of: (1) erase, (2) program or (3) lock bit
333 * configuration. So we just wait for the longest timeout of
334 * the (1)-(3), i.e. the erase timeout.
337 /* wait at least 35ns (W12) before issuing Read Status Register */
339 addr = (FPWV *) info->start[sector];
340 *addr = (FPW) INTEL_STATUS;
342 start = get_timer (0);
343 while ((*addr & (FPW) INTEL_FINISHED) != (FPW) INTEL_FINISHED) {
344 if (get_timer (start) > CFG_FLASH_ERASE_TOUT) {
345 *addr = (FPW) INTEL_RESET; /* restore read mode */
346 printf("WSM busy too long, can't get prot status\n");
351 /* issue the Read Identifier Codes command */
352 *addr = (FPW) INTEL_READID;
354 /* wait at least 35ns (W12) before reading */
357 /* Intel example code uses offset of 2 for 16 bit flash */
358 lock_conf_addr = (FPWV *) info->start[sector] + 2;
359 ret = (*lock_conf_addr & (FPW) INTEL_PROTECT) ? 1 : 0;
361 /* put flash back in read mode */
362 *addr = (FPW) INTEL_RESET;
367 /*-----------------------------------------------------------------------
370 int flash_erase (flash_info_t *info, int s_first, int s_last)
372 int flag, prot, sect;
373 ulong type, start, last;
376 if ((s_first < 0) || (s_first > s_last)) {
377 if (info->flash_id == FLASH_UNKNOWN) {
378 printf ("- missing\n");
380 printf ("- no sectors to erase\n");
385 type = (info->flash_id & FLASH_VENDMASK);
386 if ((type != FLASH_MAN_INTEL)) {
387 printf ("Can't erase unknown flash type %08lx - aborted\n",
393 for (sect = s_first; sect <= s_last; ++sect) {
394 if (info->protect[sect]) {
400 printf ("- Warning: %d protected sectors will not be erased!\n",
406 start = get_timer (0);
409 /* Disable interrupts which might cause a timeout here */
410 flag = disable_interrupts ();
412 /* Start erase on unprotected sectors */
413 for (sect = s_first; sect <= s_last; sect++) {
414 if (info->protect[sect] == 0) { /* not protected */
415 FPWV *addr = (FPWV *) (info->start[sect]);
418 printf ("Erasing sector %2d ... ", sect);
420 /* arm simple, non interrupt dependent timer */
421 start = get_timer(0);
423 *addr = (FPW) 0x00500050; /* clear status register */
424 *addr = (FPW) 0x00200020; /* erase setup */
425 *addr = (FPW) 0x00D000D0; /* erase confirm */
427 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
428 if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
429 printf ("Timeout\n");
430 *addr = (FPW) 0x00B000B0; /* suspend erase */
431 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
437 *addr = 0x00500050; /* clear status register cmd. */
438 *addr = 0x00FF00FF; /* resest to read mode */
446 /*-----------------------------------------------------------------------
447 * Copy memory to flash, returns:
450 * 2 - Flash not erased
451 * 4 - Flash not identified
454 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
458 int count, i, l, rc, port_width;
460 if (info->flash_id == FLASH_UNKNOWN) {
463 /* get lower word aligned address */
464 #ifdef FLASH_PORT_WIDTH16
473 * handle unaligned start bytes
475 if ((l = addr - wp) != 0) {
477 for (i = 0, cp = wp; i < l; ++i, ++cp) {
478 data = (data << 8) | (*(uchar *) cp);
480 for (; i < port_width && cnt > 0; ++i) {
481 data = (data << 8) | *src++;
485 for (; cnt == 0 && i < port_width; ++i, ++cp) {
486 data = (data << 8) | (*(uchar *) cp);
489 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
496 * handle word aligned part
499 while (cnt >= port_width) {
501 for (i = 0; i < port_width; ++i) {
502 data = (data << 8) | *src++;
504 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
509 if (count++ > 0x800) {
520 * handle unaligned tail bytes
523 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
524 data = (data << 8) | *src++;
527 for (; i < port_width; ++i, ++cp) {
528 data = (data << 8) | (*(uchar *) cp);
531 return (write_data (info, wp, SWAP (data)));
534 /*-----------------------------------------------------------------------
535 * Write a word or halfword to Flash, returns:
538 * 2 - Flash not erased
540 static int write_data (flash_info_t *info, ulong dest, FPW data)
542 FPWV *addr = (FPWV *) dest;
547 /* Check if Flash is (sufficiently) erased */
548 if ((*addr & data) != data) {
549 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
552 /* Disable interrupts which might cause a timeout here */
553 flag = disable_interrupts ();
555 *addr = (FPW) 0x00400040; /* write setup */
558 /* arm simple, non interrupt dependent timer */
559 start = get_timer(0);
561 /* wait while polling the status register */
562 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
563 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
564 *addr = (FPW) 0x00FF00FF; /* restore read mode */
569 *addr = (FPW) 0x00FF00FF; /* restore read mode */
574 void inline spin_wheel (void)
577 static char w[] = "\\/-";
579 printf ("\010%c", w[p]);
580 (++p == 3) ? (p = 0) : 0;
583 /*-----------------------------------------------------------------------
584 * Set/Clear sector's lock bit, returns:
586 * 1 - Error (timeout, voltage problems, etc.)
588 int flash_real_protect (flash_info_t *info, long sector, int prot)
593 vu_long *addr = (vu_long *)(info->start[sector]);
594 int flag = disable_interrupts();
596 *addr = INTEL_CLEAR; /* Clear status register */
597 if (prot) { /* Set sector lock bit */
598 *addr = INTEL_LOCKBIT; /* Sector lock bit */
599 *addr = INTEL_PROTECT; /* set */
601 else { /* Clear sector lock bit */
602 *addr = INTEL_LOCKBIT; /* All sectors lock bits */
603 *addr = INTEL_CONFIRM; /* clear */
606 start = get_timer(0);
608 while ((*addr & INTEL_FINISHED) != INTEL_FINISHED) {
609 if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT) {
610 printf("Flash lock bit operation timed out\n");
616 if (*addr != INTEL_OK) {
617 printf("Flash lock bit operation failed at %08X, CSR=%08X\n",
618 (uint)addr, (uint)*addr);
623 info->protect[sector] = prot;
626 * Clear lock bit command clears all sectors lock bits, so
627 * we have to restore lock bits of protected sectors.
628 * WARNING: code below re-locks sectors only for one bank (info).
629 * This causes problems on boards where several banks share
630 * the same chip, as sectors in othere banks will be unlocked
631 * but not re-locked. It works fine on pm520 though, as there
632 * is only one chip and one bank.
636 for (i = 0; i < info->sector_count; i++)
638 if (info->protect[i])
640 start = get_timer(0);
641 addr = (vu_long *)(info->start[i]);
642 *addr = INTEL_LOCKBIT; /* Sector lock bit */
643 *addr = INTEL_PROTECT; /* set */
644 while ((*addr & INTEL_FINISHED) != INTEL_FINISHED)
646 if (get_timer(start) > CFG_FLASH_UNLOCK_TOUT)
648 printf("Flash lock bit operation timed out\n");
656 * get the s/w sector protection status in sync with the h/w,
657 * in case something went wrong during the re-locking.
659 flash_sync_real_protect(info); /* resets flash to read mode */
665 *addr = INTEL_RESET; /* Reset to read array mode */