3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
7 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <environment.h>
33 #define FLASH_BANK_SIZE 0x1000000 /* 2 x 8 MB */
34 #define MAIN_SECT_SIZE 0x40000 /* 2 x 128 kB */
36 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
39 #define CMD_READ_ARRAY 0x00FF00FF
40 #define CMD_IDENTIFY 0x00900090
41 #define CMD_ERASE_SETUP 0x00200020
42 #define CMD_ERASE_CONFIRM 0x00D000D0
43 #define CMD_PROGRAM 0x00400040
44 #define CMD_RESUME 0x00D000D0
45 #define CMD_SUSPEND 0x00B000B0
46 #define CMD_STATUS_READ 0x00700070
47 #define CMD_STATUS_RESET 0x00500050
49 #define BIT_BUSY 0x00800080
50 #define BIT_ERASE_SUSPEND 0x00400040
51 #define BIT_ERASE_ERROR 0x00200020
52 #define BIT_PROGRAM_ERROR 0x00100010
53 #define BIT_VPP_RANGE_ERROR 0x00080008
54 #define BIT_PROGRAM_SUSPEND 0x00040004
55 #define BIT_PROTECT_ERROR 0x00020002
56 #define BIT_UNDEFINED 0x00010001
58 #define BIT_SEQUENCE_ERROR 0x00300030
59 #define BIT_TIMEOUT 0x80000000
61 /*-----------------------------------------------------------------------
64 ulong flash_init (void)
69 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
72 flash_info[i].flash_id =
73 (INTEL_MANUFACT & FLASH_VENDMASK) |
74 (INTEL_ID_28F640J3A & FLASH_TYPEMASK);
75 flash_info[i].size = FLASH_BANK_SIZE;
76 flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
77 memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
79 flashbase = CFG_FLASH_BASE;
81 panic ("configured too many flash banks!\n");
82 for (j = 0; j < flash_info[i].sector_count; j++) {
83 flash_info[i].start[j] = flashbase;
85 /* uniform sector size */
86 flashbase += MAIN_SECT_SIZE;
88 size += flash_info[i].size;
92 * Protect monitor and environment sectors
94 flash_protect ( FLAG_PROTECT_SET,
96 CFG_FLASH_BASE + monitor_flash_len - 1,
99 flash_protect ( FLAG_PROTECT_SET,
101 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
103 #ifdef CFG_ENV_ADDR_REDUND
104 flash_protect ( FLAG_PROTECT_SET,
106 CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
113 /*-----------------------------------------------------------------------
115 void flash_print_info (flash_info_t * info)
119 switch (info->flash_id & FLASH_VENDMASK) {
120 case (INTEL_MANUFACT & FLASH_VENDMASK):
124 printf ("Unknown Vendor ");
128 switch (info->flash_id & FLASH_TYPEMASK) {
129 case (INTEL_ID_28F640J3A & FLASH_TYPEMASK):
130 printf ("2x 28F640J3A (64Mbit)\n");
133 printf ("Unknown Chip Type\n");
138 printf (" Size: %ld MB in %d Sectors\n",
139 info->size >> 20, info->sector_count);
141 printf (" Sector Start Addresses:");
142 for (i = 0; i < info->sector_count; i++) {
148 info->protect[i] ? " (RO)" : " ");
155 /*-----------------------------------------------------------------------
158 int flash_error (ulong code)
160 /* Check bit patterns */
161 /* SR.7=0 is busy, SR.7=1 is ready */
162 /* all other flags indicate error on 1 */
163 /* SR.0 is undefined */
164 /* Timeout is our faked flag */
166 /* sequence is described in Intel 290644-005 document */
169 if (code & BIT_TIMEOUT) {
174 /* check Busy, SR.7 */
175 if (~code & BIT_BUSY) {
177 return ERR_PROG_ERROR;
180 /* check Vpp low, SR.3 */
181 if (code & BIT_VPP_RANGE_ERROR) {
182 puts ("Vpp range error\n");
183 return ERR_PROG_ERROR;
186 /* check Device Protect Error, SR.1 */
187 if (code & BIT_PROTECT_ERROR) {
188 puts ("Device protect error\n");
189 return ERR_PROG_ERROR;
192 /* check Command Seq Error, SR.4 & SR.5 */
193 if (code & BIT_SEQUENCE_ERROR) {
194 puts ("Command seqence error\n");
195 return ERR_PROG_ERROR;
198 /* check Block Erase Error, SR.5 */
199 if (code & BIT_ERASE_ERROR) {
200 puts ("Block erase error\n");
201 return ERR_PROG_ERROR;
204 /* check Program Error, SR.4 */
205 if (code & BIT_PROGRAM_ERROR) {
206 puts ("Program error\n");
207 return ERR_PROG_ERROR;
210 /* check Block Erase Suspended, SR.6 */
211 if (code & BIT_ERASE_SUSPEND) {
212 puts ("Block erase suspended\n");
213 return ERR_PROG_ERROR;
216 /* check Program Suspended, SR.2 */
217 if (code & BIT_PROGRAM_SUSPEND) {
218 puts ("Program suspended\n");
219 return ERR_PROG_ERROR;
226 /*-----------------------------------------------------------------------
229 int flash_erase (flash_info_t * info, int s_first, int s_last)
231 ulong result, result1;
232 int iflag, prot, sect;
239 debug ("flash_erase: s_first %d s_last %d\n", s_first, s_last);
241 /* first look for protection bits */
243 if (info->flash_id == FLASH_UNKNOWN)
244 return ERR_UNKNOWN_FLASH_TYPE;
246 if ((s_first < 0) || (s_first > s_last)) {
250 if ((info->flash_id & FLASH_VENDMASK) !=
251 (INTEL_MANUFACT & FLASH_VENDMASK)) {
252 return ERR_UNKNOWN_FLASH_VENDOR;
256 for (sect = s_first; sect <= s_last; ++sect) {
257 if (info->protect[sect]) {
263 printf ("- Warning: %d protected sectors will not be erased!\n",
270 * Disable interrupts which might cause a timeout
271 * here. Remember that our exception vectors are
272 * at address 0 in the flash, and we don't want a
273 * (ticker) exception to happen while the flash
274 * chip is in programming mode.
277 cflag = dcache_status ();
280 iflag = disable_interrupts ();
282 /* Start erase on unprotected sectors */
283 for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
285 debug ("Erasing sector %2d @ %08lX... ",
286 sect, info->start[sect]);
288 /* arm simple, non interrupt dependent timer */
289 reset_timer_masked ();
291 if (info->protect[sect] == 0) { /* not protected */
292 vu_long *addr = (vu_long *) (info->start[sect]);
293 ulong bsR7, bsR7_2, bsR5, bsR5_2;
295 /* *addr = CMD_STATUS_RESET; */
296 *addr = CMD_ERASE_SETUP;
297 *addr = CMD_ERASE_CONFIRM;
299 /* wait until flash is ready */
302 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
303 *addr = CMD_STATUS_RESET;
304 result = BIT_TIMEOUT;
308 *addr = CMD_STATUS_READ;
310 bsR7 = result & (1 << 7);
311 bsR7_2 = result & (1 << 23);
312 } while (!bsR7 | !bsR7_2);
314 *addr = CMD_STATUS_READ;
316 bsR5 = result1 & (1 << 5);
317 bsR5_2 = result1 & (1 << 21);
318 #ifdef SAMSUNG_FLASH_DEBUG
319 printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
320 if (bsR5 != 0 && bsR5_2 != 0)
321 printf ("bsR5 %lx bsR5_2 %lx\n", bsR5, bsR5_2);
324 *addr = CMD_READ_ARRAY;
327 if ((rc = flash_error (result)) != ERR_OK)
331 } else { /* it was protected */
333 printf ("protected!\n");
339 /* allow flash to settle - wait 10 ms */
340 udelay_masked (10000);
343 enable_interrupts ();
352 /*-----------------------------------------------------------------------
353 * Copy memory to flash
356 static int write_word (flash_info_t * info, ulong dest, ulong data)
358 vu_long *addr = (vu_long *) dest;
368 * Check if Flash is (sufficiently) erased
371 if ((result & data) != data)
372 return ERR_NOT_ERASED;
375 * Disable interrupts which might cause a timeout
376 * here. Remember that our exception vectors are
377 * at address 0 in the flash, and we don't want a
378 * (ticker) exception to happen while the flash
379 * chip is in programming mode.
382 cflag = dcache_status ();
385 iflag = disable_interrupts ();
387 /* *addr = CMD_STATUS_RESET; */
391 /* arm simple, non interrupt dependent timer */
392 reset_timer_masked ();
394 /* wait until flash is ready */
397 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
399 result = BIT_TIMEOUT;
403 *addr = CMD_STATUS_READ;
405 } while (~result & BIT_BUSY);
407 /* *addr = CMD_READ_ARRAY; */
408 *addr = CMD_STATUS_READ;
411 rc = flash_error (result);
414 enable_interrupts ();
420 *addr = CMD_READ_ARRAY;
425 /*-----------------------------------------------------------------------
426 * Copy memory to flash.
429 int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
435 wp = (addr & ~3); /* get lower word aligned address */
438 * handle unaligned start bytes
440 if ((l = addr - wp) != 0) {
442 for (i = 0, cp = wp; i < l; ++i, ++cp) {
443 data = (data >> 8) | (*(uchar *) cp << 24);
445 for (; i < 4 && cnt > 0; ++i) {
446 data = (data >> 8) | (*src++ << 24);
450 for (; cnt == 0 && i < 4; ++i, ++cp) {
451 data = (data >> 8) | (*(uchar *) cp << 24);
454 if ((rc = write_word (info, wp, data)) != 0) {
461 * handle word aligned part
464 data = *((vu_long *) src);
465 if ((rc = write_word (info, wp, data)) != 0) {
478 * handle unaligned tail bytes
481 for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
482 data = (data >> 8) | (*src++ << 24);
485 for (; i < 4; ++i, ++cp) {
486 data = (data >> 8) | (*(uchar *) cp << 24);
489 return write_word (info, wp, data);