2 * (C) Copyright 2004-2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
6 * Add support for Am29F016D and dynamic switch setting.
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 * Wait for completion of each sector erase command issued
31 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
36 #include <asm/processor.h>
41 #define DEBUGF(x...) printf(x)
46 #define BOOT_SMALL_FLASH 0x40 /* 01000000 */
47 #define FLASH_ONBD_N 2 /* 00000010 */
48 #define FLASH_SRAM_SEL 1 /* 00000001 */
49 #define FLASH_ONBD_N 2 /* 00000010 */
50 #define FLASH_SRAM_SEL 1 /* 00000001 */
52 #define BOOT_SMALL_FLASH_VAL 4
53 #define FLASH_ONBD_N_VAL 2
54 #define FLASH_SRAM_SEL_VAL 1
57 flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
59 static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
60 {0xFF800000, 0xFF880000, 0xFFC00000}, /* 0:000: configuraton 4 */
61 {0xFF900000, 0xFF980000, 0xFFC00000}, /* 1:001: configuraton 3 */
62 {0x00000000, 0x00000000, 0x00000000}, /* 2:010: configuraton 8 */
63 {0x00000000, 0x00000000, 0x00000000}, /* 3:011: configuraton 7 */
64 {0xFFE00000, 0xFFF00000, 0xFF800000}, /* 4:100: configuraton 2 */
65 {0xFFF00000, 0xFFF80000, 0xFF800000}, /* 5:101: configuraton 1 */
66 {0x00000000, 0x00000000, 0x00000000}, /* 6:110: configuraton 6 */
67 {0x00000000, 0x00000000, 0x00000000} /* 7:111: configuraton 5 */
70 /*-----------------------------------------------------------------------
73 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
74 static int write_word(flash_info_t * info, ulong dest, ulong data);
80 #define FLASH_WORD_SIZE unsigned char
83 /*-----------------------------------------------------------------------
86 unsigned long flash_init(void)
88 unsigned long total_b = 0;
89 unsigned long size_b[CFG_MAX_FLASH_BANKS];
90 unsigned char *fpga_base = (unsigned char *) CFG_FPGA_BASE;
91 unsigned char switch_status;
92 unsigned short index = 0;
95 /* read FPGA base register FPGA_REG0 */
96 switch_status = *fpga_base;
98 /* check the bitmap of switch status */
99 if (switch_status & BOOT_SMALL_FLASH) {
100 index += BOOT_SMALL_FLASH_VAL;
102 if (switch_status & FLASH_ONBD_N) {
103 index += FLASH_ONBD_N_VAL;
105 if (switch_status & FLASH_SRAM_SEL) {
106 index += FLASH_SRAM_SEL_VAL;
110 DEBUGF("FLASH: Index: %d\n", index);
112 /* Init: no FLASHes known */
113 for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
114 flash_info[i].flash_id = FLASH_UNKNOWN;
115 flash_info[i].sector_count = -1;
116 flash_info[i].size = 0;
118 /* check whether the address is 0 */
119 if (flash_addr_table[index][i] == 0) {
123 /* call flash_get_size() to initialize sector address */
124 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i], &flash_info[i]);
125 flash_info[i].size = size_b[i];
126 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
127 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
128 i, size_b[i], size_b[i] << 20);
129 flash_info[i].sector_count = -1;
130 flash_info[i].size = 0;
133 total_b += flash_info[i].size;
136 /* Monitor protection ON by default */
137 (void)flash_protect(FLAG_PROTECT_SET,
145 /*-----------------------------------------------------------------------
147 void flash_print_info(flash_info_t * info)
153 volatile unsigned long *flash;
155 if (info->flash_id == FLASH_UNKNOWN) {
156 printf("missing or unknown FLASH type\n");
160 switch (info->flash_id & FLASH_VENDMASK) {
174 printf("Unknown Vendor ");
178 switch (info->flash_id & FLASH_TYPEMASK) {
180 printf("AM29F040 (512 Kbit, uniform sector size)\n");
183 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
186 printf("AM29LV400T (4 Mbit, top boot sector)\n");
189 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
192 printf("AM29LV800T (8 Mbit, top boot sector)\n");
195 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
198 printf("AM29LV160T (16 Mbit, top boot sector)\n");
201 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
204 printf("AM29LV320T (32 Mbit, top boot sector)\n");
206 case FLASH_AMDLV033C:
207 printf("AM29LV033C (32 Mbit, top boot sector)\n");
210 printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
213 printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
216 printf("Unknown Chip Type\n");
220 printf(" Size: %ld KB in %d Sectors\n",
221 info->size >> 10, info->sector_count);
223 printf(" Sector Start Addresses:");
224 for (i = 0; i < info->sector_count; ++i) {
226 * Check if whole sector is erased
228 if (i != (info->sector_count - 1))
229 size = info->start[i + 1] - info->start[i];
231 size = info->start[0] + info->size - info->start[i];
233 flash = (volatile unsigned long *) info->start[i];
234 size = size >> 2; /* divide by 4 for longword access */
235 for (k = 0; k < size; k++) {
236 if (*flash++ != 0xffffffff) {
246 erased ? " E" : " ", info->protect[i] ? "RO " : " ");
252 /*-----------------------------------------------------------------------
256 * The following code cannot be run from FLASH!
258 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
261 FLASH_WORD_SIZE value;
262 ulong base = (ulong) addr;
263 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr;
265 DEBUGF("FLASH ADDR: %08x\n", (unsigned) addr);
267 /* Write auto select command: read Manufacturer ID */
269 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
271 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
273 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090;
277 DEBUGF("FLASH MANUFACT: %x\n", value);
280 case (FLASH_WORD_SIZE) AMD_MANUFACT:
281 info->flash_id = FLASH_MAN_AMD;
283 case (FLASH_WORD_SIZE) FUJ_MANUFACT:
284 info->flash_id = FLASH_MAN_FUJ;
286 case (FLASH_WORD_SIZE) SST_MANUFACT:
287 info->flash_id = FLASH_MAN_SST;
289 case (FLASH_WORD_SIZE) STM_MANUFACT:
290 info->flash_id = FLASH_MAN_STM;
293 info->flash_id = FLASH_UNKNOWN;
294 info->sector_count = 0;
296 return (0); /* no or unknown flash */
299 value = addr2[1]; /* device ID */
301 DEBUGF("\nFLASH DEVICEID: %x\n", value);
304 case (FLASH_WORD_SIZE) AMD_ID_LV040B:
305 info->flash_id += FLASH_AM040;
306 info->sector_count = 8;
307 info->size = 0x0080000; /* => 512 ko */
309 case (FLASH_WORD_SIZE) AMD_ID_F040B:
310 info->flash_id += FLASH_AM040;
311 info->sector_count = 8;
312 info->size = 0x0080000; /* => 512 ko */
314 case (FLASH_WORD_SIZE) STM_ID_M29W040B:
315 info->flash_id += FLASH_AM040;
316 info->sector_count = 8;
317 info->size = 0x0080000; /* => 512 ko */
319 case (FLASH_WORD_SIZE) AMD_ID_LV033C:
320 info->flash_id += FLASH_AMDLV033C;
321 info->sector_count = 64;
322 info->size = 0x00400000;
325 info->flash_id = FLASH_UNKNOWN;
326 return (0); /* => no or unknown flash */
329 /* set up sector start address table */
330 if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
331 ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
332 ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
333 for (i = 0; i < info->sector_count; i++)
334 info->start[i] = base + (i * 0x00010000);
336 if (info->flash_id & FLASH_BTYPE) {
337 /* set sector offsets for bottom boot block type */
338 info->start[0] = base + 0x00000000;
339 info->start[1] = base + 0x00004000;
340 info->start[2] = base + 0x00006000;
341 info->start[3] = base + 0x00008000;
342 for (i = 4; i < info->sector_count; i++) {
343 info->start[i] = base + (i * 0x00010000) - 0x00030000;
346 /* set sector offsets for top boot block type */
347 i = info->sector_count - 1;
348 info->start[i--] = base + info->size - 0x00004000;
349 info->start[i--] = base + info->size - 0x00006000;
350 info->start[i--] = base + info->size - 0x00008000;
351 for (; i >= 0; i--) {
352 info->start[i] = base + i * 0x00010000;
357 /* check for protected sectors */
358 for (i = 0; i < info->sector_count; i++) {
359 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
360 /* D0 = 1 if protected */
361 addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]);
363 /* For AMD29033C flash we need to resend the command of *
364 * reading flash protection for upper 8 Mb of flash */
366 addr2[ADDR0] = (FLASH_WORD_SIZE) 0xAAAAAAAA;
367 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x55555555;
368 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x90909090;
371 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
372 info->protect[i] = 0;
374 info->protect[i] = addr2[2] & 1;
377 /* issue bank reset to return to read mode */
378 addr2[0] = (FLASH_WORD_SIZE) 0x00F000F0;
381 * Prevent writes to uninitialized FLASH.
383 if (info->flash_id != FLASH_UNKNOWN) {
390 int wait_for_DQ7(flash_info_t * info, int sect)
392 ulong start, now, last;
393 volatile FLASH_WORD_SIZE *addr =
394 (FLASH_WORD_SIZE *) (info->start[sect]);
396 start = get_timer(0);
398 while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) !=
399 (FLASH_WORD_SIZE) 0x00800080) {
400 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
404 /* show that we're waiting */
405 if ((now - last) > 1000) { /* every second */
413 /*-----------------------------------------------------------------------
416 int flash_erase(flash_info_t * info, int s_first, int s_last)
418 volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]);
419 volatile FLASH_WORD_SIZE *addr2;
420 int flag, prot, sect, l_sect;
423 if ((s_first < 0) || (s_first > s_last)) {
424 if (info->flash_id == FLASH_UNKNOWN) {
425 printf("- missing\n");
427 printf("- no sectors to erase\n");
432 if (info->flash_id == FLASH_UNKNOWN) {
433 printf("Can't erase unknown flash type - aborted\n");
438 for (sect = s_first; sect <= s_last; ++sect) {
439 if (info->protect[sect]) {
445 printf("- Warning: %d protected sectors will not be erased!\n",
453 /* Disable interrupts which might cause a timeout here */
454 flag = disable_interrupts();
456 /* Start erase on unprotected sectors */
457 for (sect = s_first; sect <= s_last; sect++) {
458 if (info->protect[sect] == 0) { /* not protected */
459 addr2 = (FLASH_WORD_SIZE *) (info->start[sect]);
461 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
462 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
463 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
464 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
465 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
466 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
467 addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */
468 for (i = 0; i < 50; i++)
469 udelay(1000); /* wait 1 ms */
471 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
472 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
473 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080;
474 addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
475 addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
476 addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */
480 * Wait for each sector to complete, it's more
481 * reliable. According to AMD Spec, you must
482 * issue all erase commands within a specified
483 * timeout. This has been seen to fail, especially
484 * if printf()s are included (for debug)!!
486 wait_for_DQ7(info, sect);
490 /* re-enable interrupts if necessary */
494 /* wait at least 80us - let's wait 1 ms */
497 /* reset to read mode */
498 addr = (FLASH_WORD_SIZE *) info->start[0];
499 addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
505 /*-----------------------------------------------------------------------
506 * Copy memory to flash, returns:
509 * 2 - Flash not erased
511 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
516 wp = (addr & ~3); /* get lower word aligned address */
519 * handle unaligned start bytes
521 if ((l = addr - wp) != 0) {
523 for (i = 0, cp = wp; i < l; ++i, ++cp) {
524 data = (data << 8) | (*(uchar *) cp);
526 for (; i < 4 && cnt > 0; ++i) {
527 data = (data << 8) | *src++;
531 for (; cnt == 0 && i < 4; ++i, ++cp) {
532 data = (data << 8) | (*(uchar *) cp);
535 if ((rc = write_word(info, wp, data)) != 0) {
542 * handle word aligned part
546 for (i = 0; i < 4; ++i) {
547 data = (data << 8) | *src++;
549 if ((rc = write_word(info, wp, data)) != 0) {
561 * handle unaligned tail bytes
564 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
565 data = (data << 8) | *src++;
568 for (; i < 4; ++i, ++cp) {
569 data = (data << 8) | (*(uchar *) cp);
572 return (write_word(info, wp, data));
575 /*-----------------------------------------------------------------------
576 * Write a word to Flash, returns:
579 * 2 - Flash not erased
581 static int write_word(flash_info_t * info, ulong dest, ulong data)
583 volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
584 volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
585 volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
589 /* Check if Flash is (sufficiently) erased */
590 if ((*((volatile FLASH_WORD_SIZE *) dest) &
591 (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
595 for (i = 0; i < 4 / sizeof(FLASH_WORD_SIZE); i++) {
598 /* Disable interrupts which might cause a timeout here */
599 flag = disable_interrupts();
601 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
602 addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
603 addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
607 /* re-enable interrupts if necessary */
611 /* data polling for D7 */
612 start = get_timer(0);
613 while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
614 (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
616 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {