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,
30 #define FLASH_BANK_SIZE 0x800000
31 #define MAIN_SECT_SIZE 0x20000
32 #define PARAM_SECT_SIZE 0x4000
34 /* puzzle magic for lart
35 * data_*_flash are def'd in flashasm.S
38 extern u32 data_from_flash(u32);
39 extern u32 data_to_flash(u32);
41 #define PUZZLE_FROM_FLASH(x) data_from_flash((x))
42 #define PUZZLE_TO_FLASH(x) data_to_flash((x))
44 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
47 #define CMD_READ_ARRAY 0x00FF00FF
48 #define CMD_IDENTIFY 0x00900090
49 #define CMD_ERASE_SETUP 0x00200020
50 #define CMD_ERASE_CONFIRM 0x00D000D0
51 #define CMD_PROGRAM 0x00400040
52 #define CMD_RESUME 0x00D000D0
53 #define CMD_SUSPEND 0x00B000B0
54 #define CMD_STATUS_READ 0x00700070
55 #define CMD_STATUS_RESET 0x00500050
57 #define BIT_BUSY 0x00800080
58 #define BIT_ERASE_SUSPEND 0x00400040
59 #define BIT_ERASE_ERROR 0x00200020
60 #define BIT_PROGRAM_ERROR 0x00100010
61 #define BIT_VPP_RANGE_ERROR 0x00080008
62 #define BIT_PROGRAM_SUSPEND 0x00040004
63 #define BIT_PROTECT_ERROR 0x00020002
64 #define BIT_UNDEFINED 0x00010001
66 #define BIT_SEQUENCE_ERROR 0x00300030
67 #define BIT_TIMEOUT 0x80000000
69 /*-----------------------------------------------------------------------
72 ulong flash_init(void)
77 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
80 flash_info[i].flash_id =
81 (INTEL_MANUFACT & FLASH_VENDMASK) |
82 (INTEL_ID_28F160F3B & FLASH_TYPEMASK);
83 flash_info[i].size = FLASH_BANK_SIZE;
84 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
85 memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
87 flashbase = PHYS_FLASH_1;
89 panic("configured to many flash banks!\n");
90 for (j = 0; j < flash_info[i].sector_count; j++)
94 flash_info[i].start[j] = flashbase + j * PARAM_SECT_SIZE;
98 flash_info[i].start[j] = flashbase + (j - 7)*MAIN_SECT_SIZE;
101 size += flash_info[i].size;
104 /* Protect monitor and environment sectors
106 flash_protect(FLAG_PROTECT_SET,
108 CFG_FLASH_BASE + monitor_flash_len - 1,
111 flash_protect(FLAG_PROTECT_SET,
113 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
119 /*-----------------------------------------------------------------------
121 void flash_print_info (flash_info_t *info)
125 switch (info->flash_id & FLASH_VENDMASK)
127 case (INTEL_MANUFACT & FLASH_VENDMASK):
131 printf("Unknown Vendor ");
135 switch (info->flash_id & FLASH_TYPEMASK)
137 case (INTEL_ID_28F160F3B & FLASH_TYPEMASK):
138 printf("2x 28F160F3B (16Mbit)\n");
141 printf("Unknown Chip Type\n");
146 printf(" Size: %ld MB in %d Sectors\n",
147 info->size >> 20, info->sector_count);
149 printf(" Sector Start Addresses:");
150 for (i = 0; i < info->sector_count; i++)
156 printf (" %08lX%s", info->start[i],
157 info->protect[i] ? " (RO)" : " ");
164 /*-----------------------------------------------------------------------
167 int flash_error (ulong code)
169 /* Check bit patterns */
170 /* SR.7=0 is busy, SR.7=1 is ready */
171 /* all other flags indicate error on 1 */
172 /* SR.0 is undefined */
173 /* Timeout is our faked flag */
175 /* sequence is described in Intel 290644-005 document */
178 if (code & BIT_TIMEOUT)
180 printf ("Timeout\n");
184 /* check Busy, SR.7 */
185 if (~code & BIT_BUSY)
188 return ERR_PROG_ERROR;
191 /* check Vpp low, SR.3 */
192 if (code & BIT_VPP_RANGE_ERROR)
194 printf ("Vpp range error\n");
195 return ERR_PROG_ERROR;
198 /* check Device Protect Error, SR.1 */
199 if (code & BIT_PROTECT_ERROR)
201 printf ("Device protect error\n");
202 return ERR_PROG_ERROR;
205 /* check Command Seq Error, SR.4 & SR.5 */
206 if (code & BIT_SEQUENCE_ERROR)
208 printf ("Command seqence error\n");
209 return ERR_PROG_ERROR;
212 /* check Block Erase Error, SR.5 */
213 if (code & BIT_ERASE_ERROR)
215 printf ("Block erase error\n");
216 return ERR_PROG_ERROR;
219 /* check Program Error, SR.4 */
220 if (code & BIT_PROGRAM_ERROR)
222 printf ("Program error\n");
223 return ERR_PROG_ERROR;
226 /* check Block Erase Suspended, SR.6 */
227 if (code & BIT_ERASE_SUSPEND)
229 printf ("Block erase suspended\n");
230 return ERR_PROG_ERROR;
233 /* check Program Suspended, SR.2 */
234 if (code & BIT_PROGRAM_SUSPEND)
236 printf ("Program suspended\n");
237 return ERR_PROG_ERROR;
244 /*-----------------------------------------------------------------------
247 int flash_erase (flash_info_t *info, int s_first, int s_last)
250 int iflag, cflag, prot, sect;
253 /* first look for protection bits */
255 if (info->flash_id == FLASH_UNKNOWN)
256 return ERR_UNKNOWN_FLASH_TYPE;
258 if ((s_first < 0) || (s_first > s_last)) {
262 if ((info->flash_id & FLASH_VENDMASK) !=
263 (INTEL_MANUFACT & FLASH_VENDMASK)) {
264 return ERR_UNKNOWN_FLASH_VENDOR;
268 for (sect=s_first; sect<=s_last; ++sect) {
269 if (info->protect[sect]) {
274 return ERR_PROTECTED;
277 * Disable interrupts which might cause a timeout
278 * here. Remember that our exception vectors are
279 * at address 0 in the flash, and we don't want a
280 * (ticker) exception to happen while the flash
281 * chip is in programming mode.
283 cflag = icache_status();
285 iflag = disable_interrupts();
287 /* Start erase on unprotected sectors */
288 for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
290 printf("Erasing sector %2d ... ", sect);
292 /* arm simple, non interrupt dependent timer */
293 reset_timer_masked();
295 if (info->protect[sect] == 0)
296 { /* not protected */
297 vu_long *addr = (vu_long *)(info->start[sect]);
299 *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
300 *addr = PUZZLE_TO_FLASH(CMD_ERASE_SETUP);
301 *addr = PUZZLE_TO_FLASH(CMD_ERASE_CONFIRM);
303 /* wait until flash is ready */
307 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
309 *addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
310 result = BIT_TIMEOUT;
314 result = PUZZLE_FROM_FLASH(*addr);
315 } while (~result & BIT_BUSY);
317 *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);
319 if ((rc = flash_error(result)) != ERR_OK)
324 else /* it was protected */
326 printf("protected!\n");
331 printf("User Interrupt!\n");
334 /* allow flash to settle - wait 10 ms */
335 udelay_masked(10000);
346 /*-----------------------------------------------------------------------
347 * Copy memory to flash
350 volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
352 vu_long *addr = (vu_long *)dest;
357 /* Check if Flash is (sufficiently) erased
359 result = PUZZLE_FROM_FLASH(*addr);
360 if ((result & data) != data)
361 return ERR_NOT_ERASED;
364 * Disable interrupts which might cause a timeout
365 * here. Remember that our exception vectors are
366 * at address 0 in the flash, and we don't want a
367 * (ticker) exception to happen while the flash
368 * chip is in programming mode.
370 cflag = icache_status();
372 iflag = disable_interrupts();
374 *addr = PUZZLE_TO_FLASH(CMD_STATUS_RESET);
375 *addr = PUZZLE_TO_FLASH(CMD_PROGRAM);
378 /* arm simple, non interrupt dependent timer */
379 reset_timer_masked();
381 /* wait until flash is ready */
385 if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
387 *addr = PUZZLE_TO_FLASH(CMD_SUSPEND);
388 result = BIT_TIMEOUT;
392 result = PUZZLE_FROM_FLASH(*addr);
393 } while (~result & BIT_BUSY);
395 *addr = PUZZLE_TO_FLASH(CMD_READ_ARRAY);
397 rc = flash_error(result);
408 /*-----------------------------------------------------------------------
409 * Copy memory to flash.
412 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
418 wp = (addr & ~3); /* get lower word aligned address */
421 * handle unaligned start bytes
423 if ((l = addr - wp) != 0) {
425 for (i=0, cp=wp; i<l; ++i, ++cp) {
426 data = (data >> 8) | (*(uchar *)cp << 24);
428 for (; i<4 && cnt>0; ++i) {
429 data = (data >> 8) | (*src++ << 24);
433 for (; cnt==0 && i<4; ++i, ++cp) {
434 data = (data >> 8) | (*(uchar *)cp << 24);
437 if ((rc = write_word(info, wp, data)) != 0) {
444 * handle word aligned part
447 data = *((vu_long*)src);
448 if ((rc = write_word(info, wp, data)) != 0) {
461 * handle unaligned tail bytes
464 for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
465 data = (data >> 8) | (*src++ << 24);
468 for (; i<4; ++i, ++cp) {
469 data = (data >> 8) | (*(uchar *)cp << 24);
472 return write_word(info, wp, data);