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wdenk6f213472003-08-29 22:00:43 +00001/*
2 * (C) Copyright 2001
3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
4 *
wdenk198ea9e2004-02-12 15:11:57 +00005 * (C) Copyright 2001-2004
wdenk6f213472003-08-29 22:00:43 +00006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 *
8 * (C) Copyright 2003
9 * Texas Instruments, <www.ti.com>
10 * Kshitij Gupta <Kshitij@ti.com>
11 *
12 * See file CREDITS for list of people who contributed to this
13 * project.
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wdenkcd37d9e2004-02-10 00:03:41 +000022 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenk6f213472003-08-29 22:00:43 +000023 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 * MA 02111-1307 USA
29 */
30
31#include <common.h>
32#include <linux/byteorder/swab.h>
33
34#define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */
wdenkcd37d9e2004-02-10 00:03:41 +000035flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
wdenk6f213472003-08-29 22:00:43 +000036
37/* Board support for 1 or 2 flash devices */
38#undef FLASH_PORT_WIDTH32
39#define FLASH_PORT_WIDTH16
40
41#ifdef FLASH_PORT_WIDTH16
42#define FLASH_PORT_WIDTH ushort
43#define FLASH_PORT_WIDTHV vu_short
44#define SWAP(x) __swab16(x)
45#else
46#define FLASH_PORT_WIDTH ulong
47#define FLASH_PORT_WIDTHV vu_long
48#define SWAP(x) __swab32(x)
49#endif
50
51#define FPW FLASH_PORT_WIDTH
52#define FPWV FLASH_PORT_WIDTHV
53
54#define mb() __asm__ __volatile__ ("" : : : "memory")
55
56
wdenk6f213472003-08-29 22:00:43 +000057/* Flash Organization Structure */
58typedef struct OrgDef {
59 unsigned int sector_number;
60 unsigned int sector_size;
61} OrgDef;
62
63
64/* Flash Organizations */
65OrgDef OrgIntel_28F256L18T[] = {
66 {4, 32 * 1024}, /* 4 * 32kBytes sectors */
67 {255, 128 * 1024}, /* 255 * 128kBytes sectors */
68};
69
70
71/*-----------------------------------------------------------------------
72 * Functions
73 */
74unsigned long flash_init (void);
75static ulong flash_get_size (FPW * addr, flash_info_t * info);
76static int write_data (flash_info_t * info, ulong dest, FPW data);
77static void flash_get_offsets (ulong base, flash_info_t * info);
78void inline spin_wheel (void);
79void flash_print_info (flash_info_t * info);
80void flash_unprotect_sectors (FPWV * addr);
81int flash_erase (flash_info_t * info, int s_first, int s_last);
82int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt);
wdenk198ea9e2004-02-12 15:11:57 +000083void flash_unlock(flash_info_t * info);
wdenk6f213472003-08-29 22:00:43 +000084
85/*-----------------------------------------------------------------------
86 */
87
88unsigned long flash_init (void)
89{
90 int i;
91 ulong size = 0;
wdenk3ff02c22004-06-09 15:25:53 +000092
wdenk6f213472003-08-29 22:00:43 +000093 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
94 switch (i) {
95 case 0:
wdenk3ff02c22004-06-09 15:25:53 +000096 flash_get_size ((FPW *) CFG_FLASH_BASE, &flash_info[i]);
97 flash_get_offsets (CFG_FLASH_BASE, &flash_info[i]);
wdenkb98fff12004-02-09 20:51:26 +000098 /* to reset the lock bit */
99 flash_unlock(&flash_info[i]);
wdenk6f213472003-08-29 22:00:43 +0000100 break;
101 default:
wdenk5f535fe2003-09-18 09:21:33 +0000102 panic ("configured too many flash banks!\n");
wdenk6f213472003-08-29 22:00:43 +0000103 break;
104 }
105 size += flash_info[i].size;
106 }
107
108 /* Protect monitor and environment sectors
109 */
110 flash_protect (FLAG_PROTECT_SET,
111 CFG_FLASH_BASE,
112 CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]);
113
114 flash_protect (FLAG_PROTECT_SET,
115 CFG_ENV_ADDR,
116 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
117
118 return size;
119}
120
121/*-----------------------------------------------------------------------
122 */
wdenk198ea9e2004-02-12 15:11:57 +0000123void flash_unlock(flash_info_t * info)
wdenkb98fff12004-02-09 20:51:26 +0000124{
wdenkcd37d9e2004-02-10 00:03:41 +0000125 int j;
126 for (j=2;j<CFG_MAX_FLASH_SECT;j++){
127 FPWV *addr = (FPWV *) (info->start[j]);
128 flash_unprotect_sectors (addr);
129 *addr = (FPW) 0x00500050;/* clear status register */
130 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
131 }
wdenkb98fff12004-02-09 20:51:26 +0000132}
133
134/*-----------------------------------------------------------------------
135 */
wdenk6f213472003-08-29 22:00:43 +0000136static void flash_get_offsets (ulong base, flash_info_t * info)
137{
138 int i;
139 OrgDef *pOrgDef;
140
141 pOrgDef = OrgIntel_28F256L18T;
142 if (info->flash_id == FLASH_UNKNOWN) {
143 return;
144 }
145
146 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
147 for (i = 0; i < info->sector_count; i++) {
148 if (i > 255) {
149 info->start[i] = base + (i * 0x8000);
150 info->protect[i] = 0;
151 } else {
152 info->start[i] = base +
153 (i * PHYS_FLASH_SECT_SIZE);
154 info->protect[i] = 0;
155 }
156 }
157 }
158}
159
160/*-----------------------------------------------------------------------
161 */
162void flash_print_info (flash_info_t * info)
163{
164 int i;
165
166 if (info->flash_id == FLASH_UNKNOWN) {
167 printf ("missing or unknown FLASH type\n");
168 return;
169 }
170
171 switch (info->flash_id & FLASH_VENDMASK) {
172 case FLASH_MAN_INTEL:
173 printf ("INTEL ");
174 break;
175 default:
176 printf ("Unknown Vendor ");
177 break;
178 }
179
180 switch (info->flash_id & FLASH_TYPEMASK) {
181 case FLASH_28F256L18T:
182 printf ("FLASH 28F256L18T\n");
183 break;
184 default:
185 printf ("Unknown Chip Type\n");
186 break;
187 }
188
189 printf (" Size: %ld MB in %d Sectors\n",
190 info->size >> 20, info->sector_count);
191
192 printf (" Sector Start Addresses:");
193 for (i = 0; i < info->sector_count; ++i) {
194 if ((i % 5) == 0)
195 printf ("\n ");
196 printf (" %08lX%s",
wdenkcd37d9e2004-02-10 00:03:41 +0000197 info->start[i], info->protect[i] ? " (RO)" : " ");
wdenk6f213472003-08-29 22:00:43 +0000198 }
199 printf ("\n");
200 return;
201}
202
203/*
204 * The following code cannot be run from FLASH!
205 */
206static ulong flash_get_size (FPW * addr, flash_info_t * info)
207{
208 volatile FPW value;
209
210 /* Write auto select command: read Manufacturer ID */
211 addr[0x5555] = (FPW) 0x00AA00AA;
212 addr[0x2AAA] = (FPW) 0x00550055;
213 addr[0x5555] = (FPW) 0x00900090;
214
215 mb ();
216 value = addr[0];
217
218 switch (value) {
219
220 case (FPW) INTEL_MANUFACT:
221 info->flash_id = FLASH_MAN_INTEL;
222 break;
223
224 default:
225 info->flash_id = FLASH_UNKNOWN;
226 info->sector_count = 0;
227 info->size = 0;
228 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
wdenkcd37d9e2004-02-10 00:03:41 +0000229 return (0); /* no or unknown flash */
wdenk6f213472003-08-29 22:00:43 +0000230 }
231
232 mb ();
wdenkcd37d9e2004-02-10 00:03:41 +0000233 value = addr[1]; /* device ID */
wdenk6f213472003-08-29 22:00:43 +0000234 switch (value) {
235
236 case (FPW) (INTEL_ID_28F256L18T):
237 info->flash_id += FLASH_28F256L18T;
238 info->sector_count = 259;
239 info->size = 0x02000000;
wdenkcd37d9e2004-02-10 00:03:41 +0000240 break; /* => 32 MB */
wdenk6f213472003-08-29 22:00:43 +0000241
242 default:
243 info->flash_id = FLASH_UNKNOWN;
244 break;
245 }
246
247 if (info->sector_count > CFG_MAX_FLASH_SECT) {
248 printf ("** ERROR: sector count %d > max (%d) **\n",
249 info->sector_count, CFG_MAX_FLASH_SECT);
250 info->sector_count = CFG_MAX_FLASH_SECT;
251 }
252
253 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
254
255 return (info->size);
256}
257
258
wdenk6f213472003-08-29 22:00:43 +0000259/* unprotects a sector for write and erase
260 * on some intel parts, this unprotects the entire chip, but it
261 * wont hurt to call this additional times per sector...
262 */
263void flash_unprotect_sectors (FPWV * addr)
264{
265#define PD_FINTEL_WSMS_READY_MASK 0x0080
266
267 *addr = (FPW) 0x00500050; /* clear status register */
268
269 /* this sends the clear lock bit command */
270 *addr = (FPW) 0x00600060;
271 *addr = (FPW) 0x00D000D0;
272}
273
274
275/*-----------------------------------------------------------------------
276 */
277
278int flash_erase (flash_info_t * info, int s_first, int s_last)
279{
280 int flag, prot, sect;
281 ulong type, start, last;
282 int rcode = 0;
283
284 if ((s_first < 0) || (s_first > s_last)) {
285 if (info->flash_id == FLASH_UNKNOWN) {
286 printf ("- missing\n");
287 } else {
288 printf ("- no sectors to erase\n");
289 }
290 return 1;
291 }
292
293 type = (info->flash_id & FLASH_VENDMASK);
294 if ((type != FLASH_MAN_INTEL)) {
295 printf ("Can't erase unknown flash type %08lx - aborted\n",
296 info->flash_id);
297 return 1;
298 }
299
300 prot = 0;
301 for (sect = s_first; sect <= s_last; ++sect) {
302 if (info->protect[sect]) {
303 prot++;
304 }
305 }
306
307 if (prot) {
308 printf ("- Warning: %d protected sectors will not be erased!\n",
309 prot);
310 } else {
311 printf ("\n");
312 }
313
314
wdenk6f213472003-08-29 22:00:43 +0000315 start = get_timer (0);
316 last = start;
317
318 /* Disable interrupts which might cause a timeout here */
319 flag = disable_interrupts ();
320
321 /* Start erase on unprotected sectors */
322 for (sect = s_first; sect <= s_last; sect++) {
wdenkcd37d9e2004-02-10 00:03:41 +0000323 if (info->protect[sect] == 0) { /* not protected */
wdenk6f213472003-08-29 22:00:43 +0000324 FPWV *addr = (FPWV *) (info->start[sect]);
325 FPW status;
326
327 printf ("Erasing sector %2d ... ", sect);
328
329 flash_unprotect_sectors (addr);
330
331 /* arm simple, non interrupt dependent timer */
332 reset_timer_masked ();
333
334 *addr = (FPW) 0x00500050;/* clear status register */
335 *addr = (FPW) 0x00200020;/* erase setup */
336 *addr = (FPW) 0x00D000D0;/* erase confirm */
337
338 while (((status =
339 *addr) & (FPW) 0x00800080) !=
340 (FPW) 0x00800080) {
wdenk42d1f032003-10-15 23:53:47 +0000341 if (get_timer_masked () >
wdenk6f213472003-08-29 22:00:43 +0000342 CFG_FLASH_ERASE_TOUT) {
343 printf ("Timeout\n");
344 /* suspend erase */
345 *addr = (FPW) 0x00B000B0;
346 /* reset to read mode */
347 *addr = (FPW) 0x00FF00FF;
348 rcode = 1;
349 break;
350 }
351 }
352
wdenkcd37d9e2004-02-10 00:03:41 +0000353 /* clear status register cmd. */
wdenk6f213472003-08-29 22:00:43 +0000354 *addr = (FPW) 0x00500050;
355 *addr = (FPW) 0x00FF00FF;/* resest to read mode */
356 printf (" done\n");
357 }
358 }
359 return rcode;
360}
361
362/*-----------------------------------------------------------------------
363 * Copy memory to flash, returns:
364 * 0 - OK
365 * 1 - write timeout
366 * 2 - Flash not erased
367 * 4 - Flash not identified
368 */
369
370int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
371{
372 ulong cp, wp;
373 FPW data;
374 int count, i, l, rc, port_width;
375
376 if (info->flash_id == FLASH_UNKNOWN) {
377 return 4;
378 }
379/* get lower word aligned address */
380#ifdef FLASH_PORT_WIDTH16
381 wp = (addr & ~1);
382 port_width = 2;
383#else
384 wp = (addr & ~3);
385 port_width = 4;
386#endif
387
388 /*
389 * handle unaligned start bytes
390 */
391 if ((l = addr - wp) != 0) {
392 data = 0;
393 for (i = 0, cp = wp; i < l; ++i, ++cp) {
394 data = (data << 8) | (*(uchar *) cp);
395 }
396 for (; i < port_width && cnt > 0; ++i) {
397 data = (data << 8) | *src++;
398 --cnt;
399 ++cp;
400 }
401 for (; cnt == 0 && i < port_width; ++i, ++cp) {
402 data = (data << 8) | (*(uchar *) cp);
403 }
404
405 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
406 return (rc);
407 }
408 wp += port_width;
409 }
410
411 /*
412 * handle word aligned part
413 */
414 count = 0;
415 while (cnt >= port_width) {
416 data = 0;
417 for (i = 0; i < port_width; ++i) {
418 data = (data << 8) | *src++;
419 }
420 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
421 return (rc);
422 }
423 wp += port_width;
424 cnt -= port_width;
425 if (count++ > 0x800) {
426 spin_wheel ();
427 count = 0;
428 }
429 }
430
431 if (cnt == 0) {
432 return (0);
433 }
434
435 /*
436 * handle unaligned tail bytes
437 */
438 data = 0;
439 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
440 data = (data << 8) | *src++;
441 --cnt;
442 }
443 for (; i < port_width; ++i, ++cp) {
444 data = (data << 8) | (*(uchar *) cp);
445 }
446
447 return (write_data (info, wp, SWAP (data)));
448}
449
450/*-----------------------------------------------------------------------
451 * Write a word or halfword to Flash, returns:
452 * 0 - OK
453 * 1 - write timeout
454 * 2 - Flash not erased
455 */
456static int write_data (flash_info_t * info, ulong dest, FPW data)
457{
458 FPWV *addr = (FPWV *) dest;
459 ulong status;
460 int flag;
461
462 /* Check if Flash is (sufficiently) erased */
463 if ((*addr & data) != data) {
464 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
465 return (2);
466 }
wdenk6f213472003-08-29 22:00:43 +0000467 /* Disable interrupts which might cause a timeout here */
468 flag = disable_interrupts ();
469 *addr = (FPW) 0x00400040; /* write setup */
470 *addr = data;
471
472 /* arm simple, non interrupt dependent timer */
473 reset_timer_masked ();
474
475 /* wait while polling the status register */
476 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
477 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
478 *addr = (FPW) 0x00FF00FF; /* restore read mode */
479 return (1);
480 }
481 }
482 *addr = (FPW) 0x00FF00FF; /* restore read mode */
483 return (0);
484}
485
486void inline spin_wheel (void)
487{
488 static int p = 0;
489 static char w[] = "\\/-";
490
491 printf ("\010%c", w[p]);
492 (++p == 3) ? (p = 0) : 0;
493}