]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - board/mpc8266ads/flash.c
* Patch by Rune Torgersen, 13 Feb 2003:
[karo-tx-uboot.git] / board / mpc8266ads / flash.c
1 /*
2  * (C) Copyright 2000, 2001
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
6  * Add support the Sharp chips on the mpc8260ads.
7  * I started with board/ip860/flash.c and made changes I found in
8  * the MTD project by David Schleef.
9  *
10  * See file CREDITS for list of people who contributed to this
11  * project.
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License as
15  * published by the Free Software Foundation; either version 2 of
16  * the License, or (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26  * MA 02111-1307 USA
27  */
28
29 #include <common.h>
30
31
32 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips        */
33
34 #if defined(CFG_ENV_IS_IN_FLASH)
35 # ifndef  CFG_ENV_ADDR
36 #  define CFG_ENV_ADDR  (CFG_FLASH_BASE + CFG_ENV_OFFSET)
37 # endif
38 # ifndef  CFG_ENV_SIZE
39 #  define CFG_ENV_SIZE  CFG_ENV_SECT_SIZE
40 # endif
41 # ifndef  CFG_ENV_SECT_SIZE
42 #  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
43 # endif
44 #endif
45
46 /*-----------------------------------------------------------------------
47  * Functions
48  */
49 static ulong flash_get_size (vu_long *addr, flash_info_t *info);
50 static int write_word (flash_info_t *info, ulong dest, ulong data);
51 static int clear_block_lock_bit(vu_long * addr);
52
53 /*-----------------------------------------------------------------------
54  */
55
56 unsigned long flash_init (void)
57 {
58 #ifndef CONFIG_MPC8260ADS
59         volatile immap_t        *immap  = (immap_t *)CFG_IMMR;
60         volatile memctl8xx_t    *memctl = &immap->im_memctl;
61         volatile ip860_bcsr_t   *bcsr   = (ip860_bcsr_t *)BCSR_BASE;
62 #endif
63         unsigned long size;
64         int i;
65
66         /* Init: enable write,
67          * or we cannot even write flash commands
68          */
69 #ifndef CONFIG_MPC8260ADS
70         bcsr->bd_ctrl |= BD_CTRL_FLWE;
71 #endif
72
73
74         for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
75                 flash_info[i].flash_id = FLASH_UNKNOWN;
76
77                 /* set the default sector offset */
78         }
79
80         /* Static FLASH Bank configuration here - FIXME XXX */
81
82         size = flash_get_size((vu_long *)FLASH_BASE, &flash_info[0]);
83
84         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
85                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
86                         size, size<<20);
87         }
88
89 #ifndef CONFIG_MPC8260ADS
90         /* Remap FLASH according to real size */
91         memctl->memc_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
92         memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) |
93                                 (memctl->memc_br1 & ~(BR_BA_MSK));
94 #endif
95         /* Re-do sizing to get full correct info */
96         size = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]);
97
98         flash_info[0].size = size;
99
100 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
101         /* monitor protection ON by default */
102         flash_protect(FLAG_PROTECT_SET,
103                       CFG_MONITOR_BASE,
104                       CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
105                       &flash_info[0]);
106 #endif
107
108 #ifdef  CFG_ENV_IS_IN_FLASH
109         /* ENV protection ON by default */
110         flash_protect(FLAG_PROTECT_SET,
111                       CFG_ENV_ADDR,
112                       CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
113                       &flash_info[0]);
114 #endif
115         return (size);
116 }
117
118 /*-----------------------------------------------------------------------
119  */
120 void flash_print_info  (flash_info_t *info)
121 {
122         int i;
123
124         if (info->flash_id == FLASH_UNKNOWN) {
125                 printf ("missing or unknown FLASH type\n");
126                 return;
127         }
128
129         switch (info->flash_id & FLASH_VENDMASK) {
130         case FLASH_MAN_INTEL:   printf ("Intel ");              break;
131         case FLASH_MAN_SHARP:   printf ("Sharp ");              break;
132         default:                printf ("Unknown Vendor ");     break;
133         }
134
135         switch (info->flash_id & FLASH_TYPEMASK) {
136         case FLASH_28F016SV:    printf ("28F016SV (16 Mbit, 32 x 64k)\n");
137                                 break;
138         case FLASH_28F160S3:    printf ("28F160S3 (16 Mbit, 32 x 512K)\n");
139                                 break;
140         case FLASH_28F320S3:    printf ("28F320S3 (32 Mbit, 64 x 512K)\n");
141                                 break;
142         case FLASH_LH28F016SCT: printf ("28F016SC (16 Mbit, 32 x 64K)\n");
143                                 break;
144         default:                printf ("Unknown Chip Type\n");
145                                 break;
146         }
147
148         printf ("  Size: %ld MB in %d Sectors\n",
149                 info->size >> 20, info->sector_count);
150
151         printf ("  Sector Start Addresses:");
152         for (i=0; i<info->sector_count; ++i) {
153                 if ((i % 5) == 0)
154                         printf ("\n   ");
155                 printf (" %08lX%s",
156                         info->start[i],
157                         info->protect[i] ? " (RO)" : "     "
158                 );
159         }
160         printf ("\n");
161 }
162
163 /*-----------------------------------------------------------------------
164  */
165
166
167 /*-----------------------------------------------------------------------
168  */
169
170 /*
171  * The following code cannot be run from FLASH!
172  */
173
174 static ulong flash_get_size (vu_long *addr, flash_info_t *info)
175 {
176         short i;
177         ulong value;
178         ulong base = (ulong)addr;
179         ulong sector_offset;
180
181         /* Write "Intelligent Identifier" command: read Manufacturer ID */
182         *addr = 0x90909090;
183
184         value = addr[0] & 0x00FF00FF;
185         switch (value) {
186         case MT_MANUFACT:       /* SHARP, MT or => Intel */
187         case INTEL_ALT_MANU:
188                 info->flash_id = FLASH_MAN_INTEL;
189                 break;
190         default:
191                 printf("unknown manufacturer: %x\n", (unsigned int)value);
192                 info->flash_id = FLASH_UNKNOWN;
193                 info->sector_count = 0;
194                 info->size = 0;
195                 return (0);                     /* no or unknown flash  */
196         }
197
198         value = addr[1];                        /* device ID            */
199
200         switch (value) {
201         case (INTEL_ID_28F016S):
202                 info->flash_id += FLASH_28F016SV;
203                 info->sector_count = 32;
204                 info->size = 0x00400000;
205                 sector_offset = 0x20000;
206                 break;                          /* => 2x2 MB            */
207
208         case (INTEL_ID_28F160S3):
209                 info->flash_id += FLASH_28F160S3;
210                 info->sector_count = 32;
211                 info->size = 0x00400000;
212                 sector_offset = 0x20000;
213                 break;                          /* => 2x2 MB            */
214
215         case (INTEL_ID_28F320S3):
216                 info->flash_id += FLASH_28F320S3;
217                 info->sector_count = 64;
218                 info->size = 0x00800000;
219                 sector_offset = 0x20000;
220                 break;                          /* => 2x4 MB            */
221
222         case SHARP_ID_28F016SCL:
223         case SHARP_ID_28F016SCZ:
224                 info->flash_id      = FLASH_MAN_SHARP | FLASH_LH28F016SCT;
225                 info->sector_count  = 32;
226                 info->size          = 0x00800000;
227                 sector_offset = 0x40000;
228                 break;                          /* => 4x2 MB            */
229
230
231         default:
232                 info->flash_id = FLASH_UNKNOWN;
233                 return (0);                     /* => no or unknown flash */
234
235         }
236
237         /* set up sector start address table */
238         for (i = 0; i < info->sector_count; i++) {
239                 info->start[i] = base;
240                 base += sector_offset;
241                 /* don't know how to check sector protection */
242                 info->protect[i] = 0;
243         }
244
245         /*
246          * Prevent writes to uninitialized FLASH.
247          */
248         if (info->flash_id != FLASH_UNKNOWN) {
249                 addr = (vu_long *)info->start[0];
250
251                 *addr = 0xFFFFFF;       /* reset bank to read array mode */
252         }
253
254         return (info->size);
255 }
256
257
258 /*-----------------------------------------------------------------------
259  */
260
261 int     flash_erase (flash_info_t *info, int s_first, int s_last)
262 {
263         int flag, prot, sect;
264         ulong start, now, last;
265
266         if ((s_first < 0) || (s_first > s_last)) {
267                 if (info->flash_id == FLASH_UNKNOWN) {
268                         printf ("- missing\n");
269                 } else {
270                         printf ("- no sectors to erase\n");
271                 }
272                 return 1;
273         }
274
275         if (    ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL)
276              && ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_SHARP) ) {
277                 printf ("Can't erase unknown flash type %08lx - aborted\n",
278                         info->flash_id);
279                 return 1;
280         }
281
282         prot = 0;
283         for (sect=s_first; sect<=s_last; ++sect) {
284                 if (info->protect[sect]) {
285                         prot++;
286                 }
287         }
288
289         if (prot) {
290                 printf ("- Warning: %d protected sectors will not be erased!\n",
291                         prot);
292         } else {
293                 printf ("\n");
294         }
295
296         /* Make Sure Block Lock Bit is not set. */
297         if(clear_block_lock_bit((vu_long *)(info->start[s_first]))){
298                 return 1;
299         }
300
301
302         /* Start erase on unprotected sectors */
303         for (sect = s_first; sect<=s_last; sect++) {
304                 if (info->protect[sect] == 0) { /* not protected */
305                         vu_long *addr = (vu_long *)(info->start[sect]);
306
307                         last = start = get_timer (0);
308
309                         /* Disable interrupts which might cause a timeout here */
310                         flag = disable_interrupts();
311
312                         /* Reset Array */
313                         *addr = 0xffffffff;
314                         /* Clear Status Register */
315                         *addr = 0x50505050;
316                         /* Single Block Erase Command */
317                         *addr = 0x20202020;
318                         /* Confirm */
319                         *addr = 0xD0D0D0D0;
320
321                         if((info->flash_id & FLASH_TYPEMASK) != FLASH_LH28F016SCT) {
322                             /* Resume Command, as per errata update */
323                             *addr = 0xD0D0D0D0;
324                         }
325
326                         /* re-enable interrupts if necessary */
327                         if (flag)
328                                 enable_interrupts();
329
330                         /* wait at least 80us - let's wait 1 ms */
331                         udelay (1000);
332                         while ((*addr & 0x80808080) != 0x80808080) {
333                                 if(*addr & 0x20202020){
334                                         printf("Error in Block Erase - Lock Bit may be set!\n");
335                                         printf("Status Register = 0x%X\n", (uint)*addr);
336                                         *addr = 0xFFFFFFFF;     /* reset bank */
337                                         return 1;
338                                 }
339                                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
340                                         printf ("Timeout\n");
341                                         *addr = 0xFFFFFFFF;     /* reset bank */
342                                         return 1;
343                                 }
344                                 /* show that we're waiting */
345                                 if ((now - last) > 1000) {      /* every second */
346                                         putc ('.');
347                                         last = now;
348                                 }
349                         }
350
351                         /* reset to read mode */
352                         *addr = 0xFFFFFFFF;
353                 }
354         }
355
356         printf (" done\n");
357         return 0;
358 }
359
360 /*-----------------------------------------------------------------------
361  * Copy memory to flash, returns:
362  * 0 - OK
363  * 1 - write timeout
364  * 2 - Flash not erased
365  */
366
367 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
368 {
369         ulong cp, wp, data;
370         int i, l, rc;
371
372         wp = (addr & ~3);       /* get lower word aligned address */
373
374         /*
375          * handle unaligned start bytes
376          */
377         if ((l = addr - wp) != 0) {
378                 data = 0;
379                 for (i=0, cp=wp; i<l; ++i, ++cp) {
380                         data = (data << 8) | (*(uchar *)cp);
381                 }
382                 for (; i<4 && cnt>0; ++i) {
383                         data = (data << 8) | *src++;
384                         --cnt;
385                         ++cp;
386                 }
387                 for (; cnt==0 && i<4; ++i, ++cp) {
388                         data = (data << 8) | (*(uchar *)cp);
389                 }
390
391                 if ((rc = write_word(info, wp, data)) != 0) {
392                         return (rc);
393                 }
394                 wp += 4;
395         }
396
397         /*
398          * handle word aligned part
399          */
400         while (cnt >= 4) {
401                 data = 0;
402                 for (i=0; i<4; ++i) {
403                         data = (data << 8) | *src++;
404                 }
405                 if ((rc = write_word(info, wp, data)) != 0) {
406                         return (rc);
407                 }
408                 wp  += 4;
409                 cnt -= 4;
410         }
411
412         if (cnt == 0) {
413                 return (0);
414         }
415
416         /*
417          * handle unaligned tail bytes
418          */
419         data = 0;
420         for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
421                 data = (data << 8) | *src++;
422                 --cnt;
423         }
424         for (; i<4; ++i, ++cp) {
425                 data = (data << 8) | (*(uchar *)cp);
426         }
427
428         return (write_word(info, wp, data));
429 }
430
431 /*-----------------------------------------------------------------------
432  * Write a word to Flash, returns:
433  * 0 - OK
434  * 1 - write timeout
435  * 2 - Flash not erased
436  */
437 static int write_word (flash_info_t *info, ulong dest, ulong data)
438 {
439         vu_long *addr = (vu_long *)dest;
440         ulong start, csr;
441         int flag;
442
443         /* Check if Flash is (sufficiently) erased */
444         if ((*addr & data) != data) {
445                 return (2);
446         }
447         /* Disable interrupts which might cause a timeout here */
448         flag = disable_interrupts();
449
450         /* Write Command */
451         *addr = 0x10101010;
452
453         /* Write Data */
454         *addr = data;
455
456         /* re-enable interrupts if necessary */
457         if (flag)
458                 enable_interrupts();
459
460         /* data polling for D7 */
461         start = get_timer (0);
462         flag  = 0;
463         while (((csr = *addr) & 0x80808080) != 0x80808080) {
464                 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
465                         flag = 1;
466                         break;
467                 }
468         }
469         if (csr & 0x40404040) {
470                 printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr);
471                 flag = 1;
472         }
473
474         /* Clear Status Registers Command */
475         *addr = 0x50505050;
476         /* Reset to read array mode */
477         *addr = 0xFFFFFFFF;
478
479         return (flag);
480 }
481
482 /*-----------------------------------------------------------------------
483  * Clear Block Lock Bit, returns:
484  * 0 - OK
485  * 1 - Timeout
486  */
487
488 static int clear_block_lock_bit(vu_long  * addr)
489 {
490         ulong start, now;
491
492         /* Reset Array */
493         *addr = 0xffffffff;
494         /* Clear Status Register */
495         *addr = 0x50505050;
496
497         *addr = 0x60606060;
498         *addr = 0xd0d0d0d0;
499
500         start = get_timer (0);
501         while(*addr != 0x80808080){
502                 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
503                         printf ("Timeout on clearing Block Lock Bit\n");
504                         *addr = 0xFFFFFFFF;     /* reset bank */
505                         return 1;
506                 }
507         }
508         return 0;
509 }