3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #define FLASH_BANK_SIZE 0x800000
28 #define MAIN_SECT_SIZE 0x20000
29 #define PARAM_SECT_SIZE 0x4000
31 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
34 /*-----------------------------------------------------------------------
37 ulong flash_init(void)
42 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
45 flash_info[i].flash_id =
46 (INTEL_MANUFACT & FLASH_VENDMASK) |
47 (INTEL_ID_28F320B3T & FLASH_TYPEMASK);
48 flash_info[i].size = FLASH_BANK_SIZE;
49 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
50 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
52 flashbase = PHYS_FLASH_1;
54 flashbase = PHYS_FLASH_2;
56 panic("configured too many flash banks!\n");
57 for (j = 0; j < flash_info[i].sector_count; j++)
61 flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
65 flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
68 size += flash_info[i].size;
71 /* Protect monitor and environment sectors
73 flash_protect(FLAG_PROTECT_SET,
75 CFG_FLASH_BASE + monitor_flash_len - 1,
78 flash_protect(FLAG_PROTECT_SET,
80 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
86 /*-----------------------------------------------------------------------
88 void flash_print_info (flash_info_t *info)
92 switch (info->flash_id & FLASH_VENDMASK)
94 case (INTEL_MANUFACT & FLASH_VENDMASK):
98 printf("Unknown Vendor ");
102 switch (info->flash_id & FLASH_TYPEMASK)
104 case (INTEL_ID_28F320B3T & FLASH_TYPEMASK):
105 printf("28F320F3B (16Mbit)\n");
108 printf("Unknown Chip Type\n");
113 printf(" Size: %ld MB in %d Sectors\n",
114 info->size >> 20, info->sector_count);
116 printf(" Sector Start Addresses:");
117 for (i = 0; i < info->sector_count; i++)
123 printf (" %08lX%s", info->start[i],
124 info->protect[i] ? " (RO)" : " ");
131 /*-----------------------------------------------------------------------
134 int flash_erase (flash_info_t *info, int s_first, int s_last)
136 int flag, prot, sect;
139 if (info->flash_id == FLASH_UNKNOWN)
140 return ERR_UNKNOWN_FLASH_TYPE;
142 if ((s_first < 0) || (s_first > s_last)) {
146 if ((info->flash_id & FLASH_VENDMASK) !=
147 (INTEL_MANUFACT & FLASH_VENDMASK)) {
148 return ERR_UNKNOWN_FLASH_VENDOR;
152 for (sect=s_first; sect<=s_last; ++sect) {
153 if (info->protect[sect]) {
158 return ERR_PROTECTED;
161 * Disable interrupts which might cause a timeout
162 * here. Remember that our exception vectors are
163 * at address 0 in the flash, and we don't want a
164 * (ticker) exception to happen while the flash
165 * chip is in programming mode.
167 flag = disable_interrupts();
169 /* Start erase on unprotected sectors */
170 for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
172 printf("Erasing sector %2d ... ", sect);
174 /* arm simple, non interrupt dependent timer */
175 reset_timer_masked();
177 if (info->protect[sect] == 0) { /* not protected */
178 vu_long *addr = (vu_long *)(info->start[sect]);
180 *addr = 0x00200020; /* erase setup */
181 *addr = 0x00D000D0; /* erase confirm */
183 while ((*addr & 0x00800080) != 0x00800080) {
184 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
185 *addr = 0x00B000B0; /* suspend erase */
186 *addr = 0x00FF00FF; /* reset to read mode */
192 *addr = 0x00FF00FF; /* reset to read mode */
197 printf("User Interrupt!\n");
201 /* allow flash to settle - wait 10 ms */
202 udelay_masked(10000);
210 /*-----------------------------------------------------------------------
211 * Copy memory to flash
214 static int write_word (flash_info_t *info, ulong dest, ulong data)
216 vu_long *addr = (vu_long *)dest;
221 /* Check if Flash is (sufficiently) erased
223 if ((*addr & data) != data)
224 return ERR_NOT_ERASED;
227 * Disable interrupts which might cause a timeout
228 * here. Remember that our exception vectors are
229 * at address 0 in the flash, and we don't want a
230 * (ticker) exception to happen while the flash
231 * chip is in programming mode.
233 flag = disable_interrupts();
235 /* clear status register command */
238 /* program set-up command */
241 /* latch address/data */
244 /* arm simple, non interrupt dependent timer */
245 reset_timer_masked();
247 /* read status register command */
250 /* wait while polling the status register */
251 while((*addr & 0x00800080) != 0x00800080)
253 if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
255 /* suspend program command */
260 if( *addr & 0x003A003A) { /* check for error */
262 if( barf & 0x003A0000) {
267 printf("\nFlash write error %02lx at address %08lx\n",
268 barf, (unsigned long)dest);
270 printf("Block locked, not erased.\n");
275 printf("Programming error.\n");
280 printf("Vpp Low error.\n");
291 /* read array command */
300 /*-----------------------------------------------------------------------
301 * Copy memory to flash.
304 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
310 wp = (addr & ~3); /* get lower word aligned address */
313 * handle unaligned start bytes
315 if ((l = addr - wp) != 0) {
317 for (i=0, cp=wp; i<l; ++i, ++cp) {
318 data = (data >> 8) | (*(uchar *)cp << 24);
320 for (; i<4 && cnt>0; ++i) {
321 data = (data >> 8) | (*src++ << 24);
325 for (; cnt==0 && i<4; ++i, ++cp) {
326 data = (data >> 8) | (*(uchar *)cp << 24);
329 if ((rc = write_word(info, wp, data)) != 0) {
336 * handle word aligned part
339 data = *((vu_long*)src);
340 if ((rc = write_word(info, wp, data)) != 0) {
353 * handle unaligned tail bytes
356 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
357 data = (data >> 8) | (*src++ << 24);
360 for (; i<4; ++i, ++cp) {
361 data = (data >> 8) | (*(uchar *)cp << 24);
364 return write_word(info, wp, data);