]> git.sur5r.net Git - u-boot/blob - board/xsengine/flash.c
Merge branch 'mpc86xx'
[u-boot] / board / xsengine / flash.c
1 /*
2  * (C) Copyright 2002
3  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
4  *
5  * (C) Copyright 2000-2004
6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7  *
8  * See file CREDITS for list of people who contributed to this
9  * project.
10  *
11  * This program is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU General Public License as
13  * published by the Free Software Foundation; either version 2 of
14  * the License, or (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24  * MA 02111-1307 USA
25  */
26
27 #include <common.h>
28 #include <linux/byteorder/swab.h>
29
30 #define SWAP(x)               __swab32(x)
31
32 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
33
34 /* Functions */
35 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
36 static int write_word (flash_info_t *info, ulong dest, ulong data);
37 static void flash_get_offsets (ulong base, flash_info_t *info);
38
39 /*-----------------------------------------------------------------------
40  */
41 unsigned long flash_init (void)
42 {
43         int i;
44         ulong size = 0;
45
46         for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
47                 switch (i) {
48                 case 0:
49                         flash_get_size ((long *) PHYS_FLASH_1, &flash_info[i]);
50                         flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
51                         break;
52                 case 1:
53                         flash_get_size ((long *) PHYS_FLASH_2, &flash_info[i]);
54                         flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
55                         break;
56                 default:
57                         panic ("configured too many flash banks!\n");
58                         break;
59                 }
60                 size += flash_info[i].size;
61         }
62
63         /* Protect monitor and environment sectors */
64         flash_protect ( FLAG_PROTECT_SET,CFG_FLASH_BASE,CFG_FLASH_BASE + monitor_flash_len - 1,&flash_info[0] );
65         flash_protect ( FLAG_PROTECT_SET,CFG_ENV_ADDR,CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
66
67         return size;
68 }
69
70 /*-----------------------------------------------------------------------
71  */
72 static void flash_get_offsets (ulong base, flash_info_t *info)
73 {
74         int i;
75
76         if (info->flash_id == FLASH_UNKNOWN) return;
77
78         if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) {
79                 for (i = 0; i < info->sector_count; i++) {
80                         info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
81                         info->protect[i] = 0;
82                 }
83         }
84 }
85
86 /*-----------------------------------------------------------------------
87  */
88 void flash_print_info  (flash_info_t *info)
89 {
90         int i;
91
92         if (info->flash_id == FLASH_UNKNOWN) {
93                 printf ("missing or unknown FLASH type\n");
94                 return;
95         }
96
97         switch (info->flash_id & FLASH_VENDMASK) {
98         case FLASH_MAN_AMD:     printf ("AMD ");                break;
99         case FLASH_MAN_FUJ:     printf ("FUJITSU ");            break;
100         default:                printf ("Unknown Vendor ");     break;
101         }
102
103         switch (info->flash_id & FLASH_TYPEMASK) {
104         case FLASH_AMLV640U:    printf ("AM29LV640ML (64Mbit, uniform sector size)\n");
105                                 break;
106         case FLASH_S29GL064M:   printf ("S29GL064M (64Mbit, top boot sector size)\n");
107                                 break;
108         default:                printf ("Unknown Chip Type\n");
109                                 break;
110         }
111
112         printf ("  Size: %ld MB in %d Sectors\n",
113                 info->size >> 20, info->sector_count);
114
115         printf ("  Sector Start Addresses:");
116         for (i=0; i<info->sector_count; ++i) {
117                 if ((i % 5) == 0)
118                         printf ("\n   ");
119                 printf (" %08lX%s",
120                         info->start[i],
121                         info->protect[i] ? " (RO)" : "     "
122                 );
123         }
124         printf ("\n");
125         return;
126 }
127
128 /*
129  * The following code cannot be run from FLASH!
130  */
131 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
132 {
133         short i;
134         ulong value;
135         ulong base = (ulong)addr;
136
137         /* Write auto select command: read Manufacturer ID */
138         addr[0x0555] = 0x00AA00AA;
139         addr[0x02AA] = 0x00550055;
140         addr[0x0555] = 0x00900090;
141
142         value = addr[0];
143
144         debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value);
145
146         switch (value) {
147         case AMD_MANUFACT:
148                 debug ("Manufacturer: AMD\n");
149                 info->flash_id = FLASH_MAN_AMD;
150                 break;
151         case FUJ_MANUFACT:
152                 debug ("Manufacturer: FUJITSU\n");
153                 info->flash_id = FLASH_MAN_FUJ;
154                 break;
155         default:
156                 debug ("Manufacturer: *** unknown ***\n");
157                 info->flash_id = FLASH_UNKNOWN;
158                 info->sector_count = 0;
159                 info->size = 0;
160                 return (0);                     /* no or unknown flash  */
161         }
162
163         value = addr[1];                        /* device ID            */
164
165         debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value);
166
167         switch (value) {
168
169         case AMD_ID_MIRROR:
170                 debug ("Mirror Bit flash: addr[14] = %08lX  addr[15] = %08lX\n",
171                         addr[14], addr[15]);
172                 switch(addr[14]) {
173                 case AMD_ID_LV640U_2:
174                         if (addr[15] != AMD_ID_LV640U_3) {
175                                 debug ("Chip: AMLV640U -> unknown\n");
176                                 info->flash_id = FLASH_UNKNOWN;
177                         } else {
178                                 debug ("Chip: AMLV640U\n");
179                                 info->flash_id += FLASH_AMLV640U;
180                                 info->sector_count = 128;
181                                 info->size = 0x01000000;
182                         }
183                         break;                          /* => 16 MB     */
184                 case AMD_ID_GL064MT_2:
185                         if (addr[15] != AMD_ID_GL064MT_3) {
186                                 debug ("Chip: S29GL064M-R3 -> unknown\n");
187                                 info->flash_id = FLASH_UNKNOWN;
188                         } else {
189                                 debug ("Chip: S29GL064M-R3\n");
190                                 info->flash_id += FLASH_S29GL064M;
191                                 info->sector_count = 128;
192                                 info->size = 0x01000000;
193                         }
194                         break;                          /* => 16 MB     */
195                 default:
196                         debug ("Chip: *** unknown ***\n");
197                         info->flash_id = FLASH_UNKNOWN;
198                         break;
199                 }
200                 break;
201
202         default:
203                 info->flash_id = FLASH_UNKNOWN;
204                 return (0);                     /* => no or unknown flash */
205         }
206
207         /* set up sector start address table */
208         switch (value) {
209         case AMD_ID_MIRROR:
210                 switch (info->flash_id & FLASH_TYPEMASK) {
211                 /* only known types here - no default */
212                 case FLASH_AMLV128U:
213                 case FLASH_AMLV640U:
214                 case FLASH_AMLV320U:
215                         for (i = 0; i < info->sector_count; i++) {
216                                 info->start[i] = base;
217                                 base += 0x20000;
218                         }
219                         break;
220                 case FLASH_AMLV320B:
221                         for (i = 0; i < info->sector_count; i++) {
222                                 info->start[i] = base;
223                                 /*
224                                  * The first 8 sectors are 8 kB,
225                                  * all the other ones  are 64 kB
226                                  */
227                                 base += (i < 8)
228                                         ?  2 * ( 8 << 10)
229                                         :  2 * (64 << 10);
230                         }
231                         break;
232                 }
233                 break;
234
235         default:
236                 return (0);
237                 break;
238         }
239
240 #if 0
241         /* check for protected sectors */
242         for (i = 0; i < info->sector_count; i++) {
243                 /* read sector protection at sector address, (A7 .. A0) = 0x02 */
244                 /* D0 = 1 if protected */
245                 addr = (volatile unsigned long *)(info->start[i]);
246                 info->protect[i] = addr[2] & 1;
247         }
248 #endif
249
250         /*
251          * Prevent writes to uninitialized FLASH.
252          */
253         if (info->flash_id != FLASH_UNKNOWN) {
254                 addr = (volatile unsigned long *)info->start[0];
255
256                 *addr = 0x00F000F0;     /* reset bank */
257         }
258
259         return (info->size);
260 }
261
262
263 /*-----------------------------------------------------------------------
264  */
265
266 int     flash_erase (flash_info_t *info, int s_first, int s_last)
267 {
268         vu_long *addr = (vu_long*)(info->start[0]);
269         int flag, prot, sect, l_sect;
270         ulong start, now, last;
271
272         debug ("flash_erase: first: %d last: %d\n", s_first, s_last);
273
274         if ((s_first < 0) || (s_first > s_last)) {
275                 if (info->flash_id == FLASH_UNKNOWN) {
276                         printf ("- missing\n");
277                 } else {
278                         printf ("- no sectors to erase\n");
279                 }
280                 return 1;
281         }
282
283         if ((info->flash_id == FLASH_UNKNOWN) ||
284             (info->flash_id > FLASH_AMD_COMP)) {
285                 printf ("Can't erase unknown flash type %08lx - aborted\n",
286                         info->flash_id);
287                 return 1;
288         }
289
290         prot = 0;
291         for (sect=s_first; sect<=s_last; ++sect) {
292                 if (info->protect[sect]) {
293                         prot++;
294                 }
295         }
296
297         if (prot) {
298                 printf ("- Warning: %d protected sectors will not be erased!\n",
299                         prot);
300         } else {
301                 printf ("\n");
302         }
303
304         l_sect = -1;
305
306         /* Disable interrupts which might cause a timeout here */
307         flag = disable_interrupts();
308
309         addr[0x0555] = 0x00AA00AA;
310         addr[0x02AA] = 0x00550055;
311         addr[0x0555] = 0x00800080;
312         addr[0x0555] = 0x00AA00AA;
313         addr[0x02AA] = 0x00550055;
314
315         /* Start erase on unprotected sectors */
316         for (sect = s_first; sect<=s_last; sect++) {
317                 if (info->protect[sect] == 0) { /* not protected */
318                         addr = (vu_long*)(info->start[sect]);
319                         addr[0] = 0x00300030;
320                         l_sect = sect;
321                 }
322         }
323
324         /* re-enable interrupts if necessary */
325         if (flag)
326                 enable_interrupts();
327
328         /* wait at least 80us - let's wait 1 ms */
329         udelay (1000);
330
331         /*
332          * We wait for the last triggered sector
333          */
334         if (l_sect < 0)
335                 goto DONE;
336
337         start = get_timer (0);
338         last  = start;
339         addr = (vu_long*)(info->start[l_sect]);
340         while ((addr[0] & 0x00800080) != 0x00800080) {
341                 if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
342                         printf ("Timeout\n");
343                         return 1;
344                 }
345                 /* show that we're waiting */
346                 if ((now - last) > 100000) {    /* every second */
347                         putc ('.');
348                         last = now;
349                 }
350         }
351
352 DONE:
353         /* reset to read mode */
354         addr = (volatile unsigned long *)info->start[0];
355         addr[0] = 0x00F000F0;   /* reset bank */
356
357         printf (" done\n");
358         return 0;
359 }
360
361 /*-----------------------------------------------------------------------
362  * Copy memory to flash, returns:
363  * 0 - OK
364  * 1 - write timeout
365  * 2 - Flash not erased
366  */
367
368 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
369 {
370         ulong cp, wp, data;
371         int i, l, rc;
372
373         wp = (addr & ~3);       /* get lower word aligned address */
374
375         /*
376          * handle unaligned start bytes
377          */
378         if ((l = addr - wp) != 0) {
379                 data = 0;
380                 for (i=0, cp=wp; i<l; ++i, ++cp) {
381                         data = (data << 8) | (*(uchar *)cp);
382                 }
383                 for (; i<4 && cnt>0; ++i) {
384                         data = (data << 8) | *src++;
385                         --cnt;
386                         ++cp;
387                 }
388                 for (; cnt==0 && i<4; ++i, ++cp) {
389                         data = (data << 8) | (*(uchar *)cp);
390                 }
391
392                 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
393                         return (rc);
394                 }
395                 wp += 4;
396         }
397
398         /*
399          * handle word aligned part
400          */
401         while (cnt >= 4) {
402                 data = 0;
403                 for (i=0; i<4; ++i) {
404                         data = (data << 8) | *src++;
405                 }
406                 if ((rc = write_word(info, wp, SWAP(data))) != 0) {
407                         return (rc);
408                 }
409                 wp  += 4;
410                 cnt -= 4;
411         }
412
413         if (cnt == 0) {
414                 return (0);
415         }
416
417         /*
418          * handle unaligned tail bytes
419          */
420         data = 0;
421         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
422                 data = (data << 8) | *src++;
423                 --cnt;
424         }
425         for (; i<4; ++i, ++cp) {
426                 data = (data << 8) | (*(uchar *)cp);
427         }
428
429         return (write_word(info, wp, SWAP(data)));
430 }
431
432 /*-----------------------------------------------------------------------
433  * Write a word to Flash, returns:
434  * 0 - OK
435  * 1 - write timeout
436  * 2 - Flash not erased
437  */
438 static int write_word (flash_info_t *info, ulong dest, ulong data)
439 {
440         vu_long *addr = (vu_long*)(info->start[0]);
441         ulong start;
442         int flag;
443
444         /* Check if Flash is (sufficiently) erased */
445         if ((*((vu_long *)dest) & data) != data) {
446                 return (2);
447         }
448
449         /* Disable interrupts which might cause a timeout here */
450         flag = disable_interrupts();
451
452         addr[0x0555] = 0x00AA00AA;
453         addr[0x02AA] = 0x00550055;
454         addr[0x0555] = 0x00A000A0;
455
456         *((vu_long *)dest) = data;
457
458         /* re-enable interrupts if necessary */
459         if (flag)
460                 enable_interrupts();
461
462         /* data polling for D7 */
463         start = get_timer (0);
464         while ((*((vu_long *)dest) & 0x00800080) != (data & 0x00800080)) {
465                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
466                         return (1);
467                 }
468         }
469         return (0);
470 }