3 * Stäubli Faverges - <www.staubli.com>
4 * Pierre AUBERT p.aubert@staubli.com
5 * U-Boot port on RPXClassic LF (CLLF_BW31) board
7 * RPXClassic uses Am29DL323B flash memory with 2 banks
11 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
13 * See file CREDITS for list of people who contributed to this
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
36 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
38 /*-----------------------------------------------------------------------
41 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
42 static int write_word (flash_info_t *info, ulong dest, ulong data);
43 static void flash_get_offsets (ulong base, flash_info_t *info);
45 /*-----------------------------------------------------------------------
48 unsigned long flash_init (void)
50 unsigned long size_b0 ;
53 /* Init: no FLASHes known */
54 for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
55 flash_info[i].flash_id = FLASH_UNKNOWN;
58 size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
61 flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
63 #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
64 /* monitor protection ON by default */
65 flash_protect(FLAG_PROTECT_SET,
66 CONFIG_SYS_MONITOR_BASE,
67 CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
71 flash_info[0].size = size_b0;
76 /*-----------------------------------------------------------------------
78 static void flash_get_offsets (ulong base, flash_info_t *info)
82 if (info->flash_id & FLASH_BTYPE) {
83 /* set sector offsets for bottom boot block type */
84 info->start[0] = base + 0x00000000;
85 info->start[1] = base + 0x00008000;
86 info->start[2] = base + 0x00010000;
87 info->start[3] = base + 0x00018000;
88 info->start[4] = base + 0x00020000;
89 info->start[5] = base + 0x00028000;
90 info->start[6] = base + 0x00030000;
91 info->start[7] = base + 0x00038000;
92 for (i = 8; i < info->sector_count; i++) {
93 info->start[i] = base + ((i-7) * 0x00040000) ;
98 /*-----------------------------------------------------------------------
100 void flash_print_info (flash_info_t *info)
104 if (info->flash_id == FLASH_UNKNOWN) {
105 printf ("missing or unknown FLASH type\n");
109 switch (info->flash_id & FLASH_VENDMASK) {
110 case FLASH_MAN_AMD: printf ("AMD "); break;
111 default: printf ("Unknown Vendor "); break;
114 switch (info->flash_id & FLASH_TYPEMASK) {
116 printf ("AMDL323DB (16 Mbytes, bottom boot sect)\n");
119 printf ("Unknown Chip Type\n");
123 printf (" Size: %ld MB in %d Sectors\n",
124 info->size >> 20, info->sector_count);
126 printf (" Sector Start Addresses:");
127 for (i=0; i<info->sector_count; ++i) {
132 info->protect[i] ? " (RO)" : " "
138 /*-----------------------------------------------------------------------
142 /*-----------------------------------------------------------------------
146 * The following code cannot be run from FLASH!
149 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
153 ulong base = (ulong)addr;
155 /* Reset flash componeny */
156 addr [0] = 0xf0f0f0f0;
158 /* Write auto select command: read Manufacturer ID */
159 addr[0xAAA] = 0xAAAAAAAA ;
160 addr[0x555] = 0x55555555 ;
161 addr[0xAAA] = 0x90909090 ;
165 switch (value & 0x00FF00FF) {
167 info->flash_id = FLASH_MAN_AMD;
170 info->flash_id = FLASH_UNKNOWN;
171 info->sector_count = 0;
173 return (0); /* no or unknown flash */
176 value = addr[2] ; /* device ID */
178 switch (value & 0x00FF00FF) {
179 case (AMD_ID_DL323B & 0x00FF00FF):
180 info->flash_id += FLASH_AMDL323B;
181 info->sector_count = 71;
182 info->size = 0x01000000; /* 16 Mb */
186 info->flash_id = FLASH_UNKNOWN;
187 return (0); /* => no or unknown flash */
190 /* set up sector start address table */
191 /* set sector offsets for bottom boot block type */
192 info->start[0] = base + 0x00000000;
193 info->start[1] = base + 0x00008000;
194 info->start[2] = base + 0x00010000;
195 info->start[3] = base + 0x00018000;
196 info->start[4] = base + 0x00020000;
197 info->start[5] = base + 0x00028000;
198 info->start[6] = base + 0x00030000;
199 info->start[7] = base + 0x00038000;
200 for (i = 8; i < info->sector_count; i++) {
201 info->start[i] = base + ((i-7) * 0x00040000) ;
204 /* check for protected sectors */
205 for (i = 0; i < 23; i++) {
206 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
207 /* D0 = 1 if protected */
208 addr = (volatile unsigned long *)(info->start[i]);
209 info->protect[i] = addr[4] & 1 ;
211 /* Check for protected sectors in the 2nd bank */
212 addr[0x100AAA] = 0xAAAAAAAA ;
213 addr[0x100555] = 0x55555555 ;
214 addr[0x100AAA] = 0x90909090 ;
216 for (i = 23; i < info->sector_count; i++) {
217 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
218 /* D0 = 1 if protected */
219 addr = (volatile unsigned long *)(info->start[i]);
220 info->protect[i] = addr[4] & 1 ;
224 * Prevent writes to uninitialized FLASH.
226 if (info->flash_id != FLASH_UNKNOWN) {
227 addr = (volatile unsigned long *)info->start[0];
229 *addr = 0xF0F0F0F0; /* reset bank 1 */
230 addr = (volatile unsigned long *)info->start[23];
232 *addr = 0xF0F0F0F0; /* reset bank 2 */
240 /*-----------------------------------------------------------------------
243 int flash_erase (flash_info_t *info, int s_first, int s_last)
245 vu_long *addr = (vu_long*)(info->start[0]);
246 int flag, prot, sect, l_sect;
247 ulong start, now, last;
249 if ((s_first < 0) || (s_first > s_last)) {
250 if (info->flash_id == FLASH_UNKNOWN) {
251 printf ("- missing\n");
253 printf ("- no sectors to erase\n");
258 if ((info->flash_id == FLASH_UNKNOWN) ||
259 (info->flash_id > FLASH_AMD_COMP)) {
260 printf ("Can't erase unknown flash type %08lx - aborted\n",
266 for (sect=s_first; sect<=s_last; ++sect) {
267 if (info->protect[sect]) {
273 printf ("- Warning: %d protected sectors will not be erased!\n",
281 /* Disable interrupts which might cause a timeout here */
282 flag = disable_interrupts();
284 addr[0xAAA] = 0xAAAAAAAA;
285 addr[0x555] = 0x55555555;
286 addr[0xAAA] = 0x80808080;
287 addr[0xAAA] = 0xAAAAAAAA;
288 addr[0x555] = 0x55555555;
290 /* Start erase on unprotected sectors */
291 for (sect = s_first; sect<=s_last; sect++) {
292 if (info->protect[sect] == 0) { /* not protected */
293 addr = (vu_long *)(info->start[sect]) ;
294 addr[0] = 0x30303030 ;
299 /* re-enable interrupts if necessary */
303 /* wait at least 80us - let's wait 1 ms */
307 * We wait for the last triggered sector
312 start = get_timer (0);
314 addr = (vu_long *)(info->start[l_sect]);
315 while ((addr[0] & 0x80808080) != 0x80808080) {
316 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
317 printf ("Timeout\n");
320 /* show that we're waiting */
321 if ((now - last) > 1000) { /* every second */
328 /* reset to read mode */
329 addr = (vu_long *)info->start[0];
330 addr[0] = 0xF0F0F0F0; /* reset bank */
336 /*-----------------------------------------------------------------------
337 * Copy memory to flash, returns:
340 * 2 - Flash not erased
343 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
348 wp = (addr & ~3); /* get lower word aligned address */
351 * handle unaligned start bytes
353 if ((l = addr - wp) != 0) {
355 for (i=0, cp=wp; i<l; ++i, ++cp) {
356 data = (data << 8) | (*(uchar *)cp);
358 for (; i<4 && cnt>0; ++i) {
359 data = (data << 8) | *src++;
363 for (; cnt==0 && i<4; ++i, ++cp) {
364 data = (data << 8) | (*(uchar *)cp);
367 if ((rc = write_word(info, wp, data)) != 0) {
374 * handle word aligned part
378 for (i=0; i<4; ++i) {
379 data = (data << 8) | *src++;
381 if ((rc = write_word(info, wp, data)) != 0) {
393 * handle unaligned tail bytes
396 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
397 data = (data << 8) | *src++;
400 for (; i<4; ++i, ++cp) {
401 data = (data << 8) | (*(uchar *)cp);
404 return (write_word(info, wp, data));
407 /*-----------------------------------------------------------------------
408 * Write a word to Flash, returns:
411 * 2 - Flash not erased
413 static int write_word (flash_info_t *info, ulong dest, ulong data)
415 vu_long *addr = (vu_long *)(info->start[0]);
419 /* Check if Flash is (sufficiently) erased */
420 if ((*((vu_long *)dest) & data) != data) {
423 /* Disable interrupts which might cause a timeout here */
424 flag = disable_interrupts();
426 addr[0xAAA] = 0xAAAAAAAA;
427 addr[0x555] = 0x55555555;
428 addr[0xAAA] = 0xA0A0A0A0;
430 *((vu_long *)dest) = data;
432 /* re-enable interrupts if necessary */
436 /* data polling for D7 */
437 start = get_timer (0);
438 while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
439 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
446 /*-----------------------------------------------------------------------