]> git.sur5r.net Git - u-boot/blob - board/netta/flash.c
Merge branch 'master' of git://git.denx.de/u-boot-nds32
[u-boot] / board / netta / flash.c
1 /*
2  * (C) Copyright 2000-2004
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <mpc8xx.h>
10
11 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];    /* info for FLASH chips    */
12
13 /*-----------------------------------------------------------------------
14  * Functions
15  */
16 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
17 static int write_byte(flash_info_t * info, ulong dest, uchar data);
18 static void flash_get_offsets(ulong base, flash_info_t * info);
19
20 /*-----------------------------------------------------------------------
21  */
22
23 unsigned long flash_init(void)
24 {
25         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
26         volatile memctl8xx_t *memctl = &immap->im_memctl;
27         unsigned long size;
28         int i;
29
30         /* Init: no FLASHes known */
31         for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
32                 flash_info[i].flash_id = FLASH_UNKNOWN;
33
34         size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
35
36         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
37                 printf("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size, size << 20);
38         }
39
40         /* Remap FLASH according to real size */
41         memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size & 0xFFFF8000);
42         memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));
43
44         /* Re-do sizing to get full correct info */
45         size = flash_get_size((vu_long *) CONFIG_SYS_FLASH_BASE, &flash_info[0]);
46
47         flash_get_offsets(CONFIG_SYS_FLASH_BASE, &flash_info[0]);
48
49         /* monitor protection ON by default */
50         flash_protect(FLAG_PROTECT_SET,
51                         CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
52                         &flash_info[0]);
53
54         flash_protect ( FLAG_PROTECT_SET,
55                         CONFIG_ENV_ADDR,
56                         CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
57                         &flash_info[0]);
58
59 #ifdef CONFIG_ENV_ADDR_REDUND
60         flash_protect ( FLAG_PROTECT_SET,
61                         CONFIG_ENV_ADDR_REDUND,
62                         CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
63                         &flash_info[0]);
64 #endif
65
66
67         flash_info[0].size = size;
68
69         return (size);
70 }
71
72 /*-----------------------------------------------------------------------
73  */
74 static void flash_get_offsets(ulong base, flash_info_t * info)
75 {
76         int i;
77
78         /* set up sector start address table */
79         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
80                 for (i = 0; i < info->sector_count; i++) {
81                         info->start[i] = base + (i * 0x00010000);
82                 }
83         } else if (info->flash_id & FLASH_BTYPE) {
84                 /* set sector offsets for bottom boot block type    */
85                 info->start[0] = base + 0x00000000;
86                 info->start[1] = base + 0x00004000;
87                 info->start[2] = base + 0x00006000;
88                 info->start[3] = base + 0x00008000;
89                 for (i = 4; i < info->sector_count; i++) {
90                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
91                 }
92         } else {
93                 /* set sector offsets for top boot block type       */
94                 i = info->sector_count - 1;
95                 info->start[i--] = base + info->size - 0x00004000;
96                 info->start[i--] = base + info->size - 0x00006000;
97                 info->start[i--] = base + info->size - 0x00008000;
98                 for (; i >= 0; i--) {
99                         info->start[i] = base + i * 0x00010000;
100                 }
101         }
102
103 }
104
105 /*-----------------------------------------------------------------------
106  */
107 void flash_print_info(flash_info_t * info)
108 {
109         int i;
110
111         if (info->flash_id == FLASH_UNKNOWN) {
112                 printf("missing or unknown FLASH type\n");
113                 return;
114         }
115
116         switch (info->flash_id & FLASH_VENDMASK) {
117         case FLASH_MAN_AMD:
118                 printf("AMD ");
119                 break;
120         case FLASH_MAN_FUJ:
121                 printf("FUJITSU ");
122                 break;
123         case FLASH_MAN_MX:
124                 printf("MXIC ");
125                 break;
126         default:
127                 printf("Unknown Vendor ");
128                 break;
129         }
130
131         switch (info->flash_id & FLASH_TYPEMASK) {
132         case FLASH_AM040:
133                 printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
134                 break;
135         case FLASH_AM400B:
136                 printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
137                 break;
138         case FLASH_AM400T:
139                 printf("AM29LV400T (4 Mbit, top boot sector)\n");
140                 break;
141         case FLASH_AM800B:
142                 printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
143                 break;
144         case FLASH_AM800T:
145                 printf("AM29LV800T (8 Mbit, top boot sector)\n");
146                 break;
147         case FLASH_AM160B:
148                 printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
149                 break;
150         case FLASH_AM160T:
151                 printf("AM29LV160T (16 Mbit, top boot sector)\n");
152                 break;
153         case FLASH_AM320B:
154                 printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
155                 break;
156         case FLASH_AM320T:
157                 printf("AM29LV320T (32 Mbit, top boot sector)\n");
158                 break;
159         default:
160                 printf("Unknown Chip Type\n");
161                 break;
162         }
163
164         printf("  Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
165
166         printf("  Sector Start Addresses:");
167         for (i = 0; i < info->sector_count; ++i) {
168                 if ((i % 5) == 0)
169                         printf("\n   ");
170                 printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
171         }
172         printf("\n");
173 }
174
175 /*-----------------------------------------------------------------------
176  */
177
178
179 /*-----------------------------------------------------------------------
180  */
181
182 /*
183  * The following code cannot be run from FLASH!
184  */
185
186 static ulong flash_get_size(vu_long * addr, flash_info_t * info)
187 {
188         short i;
189         uchar mid;
190         uchar pid;
191         vu_char *caddr = (vu_char *) addr;
192         ulong base = (ulong) addr;
193
194
195         /* Write auto select command: read Manufacturer ID */
196         caddr[0x0555] = 0xAA;
197         caddr[0x02AA] = 0x55;
198         caddr[0x0555] = 0x90;
199
200         mid = caddr[0];
201         switch (mid) {
202         case (AMD_MANUFACT & 0xFF):
203                 info->flash_id = FLASH_MAN_AMD;
204                 break;
205         case (FUJ_MANUFACT & 0xFF):
206                 info->flash_id = FLASH_MAN_FUJ;
207                 break;
208         case (MX_MANUFACT & 0xFF):
209                 info->flash_id = FLASH_MAN_MX;
210                 break;
211         case (STM_MANUFACT & 0xFF):
212                 info->flash_id = FLASH_MAN_STM;
213                 break;
214         default:
215                 info->flash_id = FLASH_UNKNOWN;
216                 info->sector_count = 0;
217                 info->size = 0;
218                 return (0);                             /* no or unknown flash  */
219         }
220
221         pid = caddr[1];                         /* device ID        */
222         switch (pid) {
223         case (AMD_ID_LV400T & 0xFF):
224                 info->flash_id += FLASH_AM400T;
225                 info->sector_count = 11;
226                 info->size = 0x00080000;
227                 break;                                  /* => 512 kB        */
228
229         case (AMD_ID_LV400B & 0xFF):
230                 info->flash_id += FLASH_AM400B;
231                 info->sector_count = 11;
232                 info->size = 0x00080000;
233                 break;                                  /* => 512 kB        */
234
235         case (AMD_ID_LV800T & 0xFF):
236                 info->flash_id += FLASH_AM800T;
237                 info->sector_count = 19;
238                 info->size = 0x00100000;
239                 break;                                  /* => 1 MB      */
240
241         case (AMD_ID_LV800B & 0xFF):
242                 info->flash_id += FLASH_AM800B;
243                 info->sector_count = 19;
244                 info->size = 0x00100000;
245                 break;                                  /* => 1 MB      */
246
247         case (AMD_ID_LV160T & 0xFF):
248                 info->flash_id += FLASH_AM160T;
249                 info->sector_count = 35;
250                 info->size = 0x00200000;
251                 break;                                  /* => 2 MB      */
252
253         case (AMD_ID_LV160B & 0xFF):
254                 info->flash_id += FLASH_AM160B;
255                 info->sector_count = 35;
256                 info->size = 0x00200000;
257                 break;                                  /* => 2 MB      */
258
259         case (AMD_ID_LV040B & 0xFF):
260                 info->flash_id += FLASH_AM040;
261                 info->sector_count = 8;
262                 info->size = 0x00080000;
263                 break;
264
265         case (STM_ID_M29W040B & 0xFF):
266                 info->flash_id += FLASH_AM040;
267                 info->sector_count = 8;
268                 info->size = 0x00080000;
269                 break;
270
271 #if 0                                                   /* enable when device IDs are available */
272         case (AMD_ID_LV320T & 0xFF):
273                 info->flash_id += FLASH_AM320T;
274                 info->sector_count = 67;
275                 info->size = 0x00400000;
276                 break;                                  /* => 4 MB      */
277
278         case (AMD_ID_LV320B & 0xFF):
279                 info->flash_id += FLASH_AM320B;
280                 info->sector_count = 67;
281                 info->size = 0x00400000;
282                 break;                                  /* => 4 MB      */
283 #endif
284         default:
285                 info->flash_id = FLASH_UNKNOWN;
286                 return (0);                             /* => no or unknown flash */
287
288         }
289
290         printf(" ");
291         /* set up sector start address table */
292         if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
293                 for (i = 0; i < info->sector_count; i++) {
294                         info->start[i] = base + (i * 0x00010000);
295                 }
296         } else if (info->flash_id & FLASH_BTYPE) {
297                 /* set sector offsets for bottom boot block type    */
298                 info->start[0] = base + 0x00000000;
299                 info->start[1] = base + 0x00004000;
300                 info->start[2] = base + 0x00006000;
301                 info->start[3] = base + 0x00008000;
302                 for (i = 4; i < info->sector_count; i++) {
303                         info->start[i] = base + (i * 0x00010000) - 0x00030000;
304                 }
305         } else {
306                 /* set sector offsets for top boot block type       */
307                 i = info->sector_count - 1;
308                 info->start[i--] = base + info->size - 0x00004000;
309                 info->start[i--] = base + info->size - 0x00006000;
310                 info->start[i--] = base + info->size - 0x00008000;
311                 for (; i >= 0; i--) {
312                         info->start[i] = base + i * 0x00010000;
313                 }
314         }
315
316         /* check for protected sectors */
317         for (i = 0; i < info->sector_count; i++) {
318                 /* read sector protection: D0 = 1 if protected */
319                 caddr = (volatile unsigned char *)(info->start[i]);
320                 info->protect[i] = caddr[2] & 1;
321         }
322
323         /*
324          * Prevent writes to uninitialized FLASH.
325          */
326         if (info->flash_id != FLASH_UNKNOWN) {
327                 caddr = (vu_char *) info->start[0];
328
329                 caddr[0x0555] = 0xAA;
330                 caddr[0x02AA] = 0x55;
331                 caddr[0x0555] = 0xF0;
332
333                 udelay(20000);
334         }
335
336         return (info->size);
337 }
338
339
340 /*-----------------------------------------------------------------------
341  */
342
343 int flash_erase(flash_info_t * info, int s_first, int s_last)
344 {
345         vu_char *addr = (vu_char *) (info->start[0]);
346         int flag, prot, sect, l_sect;
347         ulong start, now, last;
348
349         if ((s_first < 0) || (s_first > s_last)) {
350                 if (info->flash_id == FLASH_UNKNOWN) {
351                         printf("- missing\n");
352                 } else {
353                         printf("- no sectors to erase\n");
354                 }
355                 return 1;
356         }
357
358         if ((info->flash_id == FLASH_UNKNOWN) ||
359             (info->flash_id > FLASH_AMD_COMP)) {
360                 printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
361                 return 1;
362         }
363
364         prot = 0;
365         for (sect = s_first; sect <= s_last; ++sect) {
366                 if (info->protect[sect]) {
367                         prot++;
368                 }
369         }
370
371         if (prot) {
372                 printf("- Warning: %d protected sectors will not be erased!\n", prot);
373         } else {
374                 printf("\n");
375         }
376
377         l_sect = -1;
378
379         /* Disable interrupts which might cause a timeout here */
380         flag = disable_interrupts();
381
382         addr[0x0555] = 0xAA;
383         addr[0x02AA] = 0x55;
384         addr[0x0555] = 0x80;
385         addr[0x0555] = 0xAA;
386         addr[0x02AA] = 0x55;
387
388         /* Start erase on unprotected sectors */
389         for (sect = s_first; sect <= s_last; sect++) {
390                 if (info->protect[sect] == 0) { /* not protected */
391                         addr = (vu_char *) (info->start[sect]);
392                         addr[0] = 0x30;
393                         l_sect = sect;
394                 }
395         }
396
397         /* re-enable interrupts if necessary */
398         if (flag)
399                 enable_interrupts();
400
401         /* wait at least 80us - let's wait 1 ms */
402         udelay(1000);
403
404         /*
405          * We wait for the last triggered sector
406          */
407         if (l_sect < 0)
408                 goto DONE;
409
410         start = get_timer(0);
411         last = start;
412         addr = (vu_char *) (info->start[l_sect]);
413         while ((addr[0] & 0x80) != 0x80) {
414                 if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
415                         printf("Timeout\n");
416                         return 1;
417                 }
418                 /* show that we're waiting */
419                 if ((now - last) > 1000) {      /* every second */
420                         putc('.');
421                         last = now;
422                 }
423         }
424
425   DONE:
426         /* reset to read mode */
427         addr = (vu_char *) info->start[0];
428         addr[0] = 0xF0;                         /* reset bank */
429
430         printf(" done\n");
431         return 0;
432 }
433
434 /*-----------------------------------------------------------------------
435  * Copy memory to flash, returns:
436  * 0 - OK
437  * 1 - write timeout
438  * 2 - Flash not erased
439  */
440
441 int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
442 {
443         int rc;
444
445         while (cnt > 0) {
446                 if ((rc = write_byte(info, addr++, *src++)) != 0) {
447                         return (rc);
448                 }
449                 --cnt;
450         }
451
452         return (0);
453 }
454
455 /*-----------------------------------------------------------------------
456  * Write a word to Flash, returns:
457  * 0 - OK
458  * 1 - write timeout
459  * 2 - Flash not erased
460  */
461 static int write_byte(flash_info_t * info, ulong dest, uchar data)
462 {
463         vu_char *addr = (vu_char *) (info->start[0]);
464         ulong start;
465         int flag;
466
467         /* Check if Flash is (sufficiently) erased */
468         if ((*((vu_char *) dest) & data) != data) {
469                 return (2);
470         }
471         /* Disable interrupts which might cause a timeout here */
472         flag = disable_interrupts();
473
474         addr[0x0555] = 0xAA;
475         addr[0x02AA] = 0x55;
476         addr[0x0555] = 0xA0;
477
478         *((vu_char *) dest) = data;
479
480         /* re-enable interrupts if necessary */
481         if (flag)
482                 enable_interrupts();
483
484         /* data polling for D7 */
485         start = get_timer(0);
486         while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
487                 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
488                         return (1);
489                 }
490         }
491         return (0);
492 }