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warnings: use more 'const' for char *
[openocd/ellerodev.git] / src / flash / nor / at91sam7.c
blobad6ee6c385e9365eb26475d8055bbd68e6d85646
1 /***************************************************************************
2 * Copyright (C) 2006 by Magnus Lundin *
3 * lundin@mlu.mine.nu *
4 * *
5 * Copyright (C) 2008 by Gheorghe Guran (atlas) *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE. See the *
15 * GNU General public License for more details. *
16 * *
17 * You should have received a copy of the GNU General public License *
18 * along with this program; if not, write to the *
19 * Free Software Foundation, Inc., *
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
21 ****************************************************************************/
22
23 /***************************************************************************
24 *
25 * New flash setup command:
26 *
27 * flash bank <driver> <base_addr> <size> <chip_width> <bus_width> <target_id>
28 * [<chip_type> <banks>
29 * <sectors_per_bank> <pages_per_sector>
30 * <page_size> <num_nvmbits>
31 * <ext_freq_khz>]
32 *
33 * <ext_freq_khz> - MUST be used if clock is from external source,
34 * CAN be used if main oscillator frequency is known (recommended)
35 * Examples:
36 * ==== RECOMMENDED (covers clock speed) ============
37 * flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 25000
38 * (if auto-detect fails; provides clock spec)
39 * flash bank at91sam7 0 0 0 0 $_TARGETNAME 0 0 0 0 0 0 25000
40 * (auto-detect everything except the clock)
41 * ==== NOT RECOMMENDED !!! (clock speed is not configured) ====
42 * flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 0
43 * (if auto-detect fails)
44 * flash bank at91sam7 0 0 0 0 $_TARGETNAME
45 * (old style, auto-detect everything)
46 ****************************************************************************/
47
48 #ifdef HAVE_CONFIG_H
49 #include "config.h"
50 #endif
51
52 #include "imp.h"
53 #include <helper/binarybuffer.h>
54
55
56 /* AT91SAM7 control registers */
57 #define DBGU_CIDR 0xFFFFF240
58 #define CKGR_MCFR 0xFFFFFC24
59 #define CKGR_MOR 0xFFFFFC20
60 #define CKGR_MCFR_MAINRDY 0x10000
61 #define CKGR_PLLR 0xFFFFFC2c
62 #define CKGR_PLLR_DIV 0xff
63 #define CKGR_PLLR_MUL 0x07ff0000
64 #define PMC_MCKR 0xFFFFFC30
65 #define PMC_MCKR_CSS 0x03
66 #define PMC_MCKR_PRES 0x1c
67
68 /* Flash Controller Commands */
69 #define WP 0x01
70 #define SLB 0x02
71 #define WPL 0x03
72 #define CLB 0x04
73 #define EA 0x08
74 #define SGPB 0x0B
75 #define CGPB 0x0D
76 #define SSB 0x0F
77
78 /* MC_FSR bit definitions */
79 #define MC_FSR_FRDY 1
80 #define MC_FSR_EOL 2
81
82 /* AT91SAM7 constants */
83 #define RC_FREQ 32000
84
85 /* Flash timing modes */
86 #define FMR_TIMING_NONE 0
87 #define FMR_TIMING_NVBITS 1
88 #define FMR_TIMING_FLASH 2
89
90 /* Flash size constants */
91 #define FLASH_SIZE_8KB 1
92 #define FLASH_SIZE_16KB 2
93 #define FLASH_SIZE_32KB 3
94 #define FLASH_SIZE_64KB 5
95 #define FLASH_SIZE_128KB 7
96 #define FLASH_SIZE_256KB 9
97 #define FLASH_SIZE_512KB 10
98 #define FLASH_SIZE_1024KB 12
99 #define FLASH_SIZE_2048KB 14
100
101
102 static int at91sam7_protect_check(struct flash_bank *bank);
103 static int at91sam7_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count);
104
105 static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number);
106 static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode);
107 static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout);
108 static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen);
109
110 static uint32_t MC_FMR[4] = { 0xFFFFFF60, 0xFFFFFF70, 0xFFFFFF80, 0xFFFFFF90 };
111 static uint32_t MC_FCR[4] = { 0xFFFFFF64, 0xFFFFFF74, 0xFFFFFF84, 0xFFFFFF94 };
112 static uint32_t MC_FSR[4] = { 0xFFFFFF68, 0xFFFFFF78, 0xFFFFFF88, 0xFFFFFF98 };
113
114 static char * EPROC[8]= {"Unknown","ARM946-E","ARM7TDMI","Unknown","ARM920T","ARM926EJ-S","Unknown","Unknown"};
115
116 struct at91sam7_flash_bank
117 {
118 /* chip id register */
119 uint32_t cidr;
120 uint16_t cidr_ext;
121 uint16_t cidr_nvptyp;
122 uint16_t cidr_arch;
123 uint16_t cidr_sramsiz;
124 uint16_t cidr_nvpsiz;
125 uint16_t cidr_nvpsiz2;
126 uint16_t cidr_eproc;
127 uint16_t cidr_version;
128 const char *target_name;
129
130 /* flash auto-detection */
131 uint8_t flash_autodetection;
132
133 /* flash geometry */
134 uint16_t pages_per_sector;
135 uint16_t pagesize;
136 uint16_t pages_in_lockregion;
137
138 /* nv memory bits */
139 uint16_t num_lockbits_on;
140 uint16_t lockbits;
141 uint16_t num_nvmbits;
142 uint16_t num_nvmbits_on;
143 uint16_t nvmbits;
144 uint8_t securitybit;
145
146 /* 0: not init
147 * 1: fmcn for nvbits (1uS)
148 * 2: fmcn for flash (1.5uS) */
149 uint8_t flashmode;
150
151 /* main clock status */
152 uint8_t mck_valid;
153 uint32_t mck_freq;
154
155 /* external clock frequency */
156 uint32_t ext_freq;
157
158 };
159
160 #if 0
161 static long SRAMSIZ[16] = {
162 -1,
163 0x0400, /* 1K */
164 0x0800, /* 2K */
165 -1,
166 0x1c000, /* 112K */
167 0x1000, /* 4K */
168 0x14000, /* 80K */
169 0x28000, /* 160K */
170 0x2000, /* 8K */
171 0x4000, /* 16K */
172 0x8000, /* 32K */
173 0x10000, /* 64K */
174 0x20000, /* 128K */
175 0x40000, /* 256K */
176 0x18000, /* 96K */
177 0x80000, /* 512K */
178 };
179 #endif
180
181
182 static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number)
183 {
184 uint32_t fsr;
185 target_read_u32(target, MC_FSR[bank_number], &fsr);
186
187 return fsr;
188 }
189
190 /* Read clock configuration and set at91sam7_info->mck_freq */
191 static void at91sam7_read_clock_info(struct flash_bank *bank)
192 {
193 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
194 struct target *target = bank->target;
195 uint32_t mckr, mcfr, pllr, mor;
196 unsigned long tmp = 0, mainfreq;
197
198 /* Read Clock Generator Main Oscillator Register */
199 target_read_u32(target, CKGR_MOR, &mor);
200 /* Read Clock Generator Main Clock Frequency Register */
201 target_read_u32(target, CKGR_MCFR, &mcfr);
202 /* Read Master Clock Register*/
203 target_read_u32(target, PMC_MCKR, &mckr);
204 /* Read Clock Generator PLL Register */
205 target_read_u32(target, CKGR_PLLR, &pllr);
206
207 at91sam7_info->mck_valid = 0;
208 at91sam7_info->mck_freq = 0;
209 switch (mckr & PMC_MCKR_CSS)
210 {
211 case 0: /* Slow Clock */
212 at91sam7_info->mck_valid = 1;
213 tmp = RC_FREQ;
214 break;
215
216 case 1: /* Main Clock */
217 if ((mcfr & CKGR_MCFR_MAINRDY) &&
218 (at91sam7_info->ext_freq == 0))
219 {
220 at91sam7_info->mck_valid = 1;
221 tmp = RC_FREQ / 16ul * (mcfr & 0xffff);
222 }
223 else if (at91sam7_info->ext_freq != 0)
224 {
225 at91sam7_info->mck_valid = 1;
226 tmp = at91sam7_info->ext_freq;
227 }
228 break;
229
230 case 2: /* Reserved */
231 break;
232
233 case 3: /* PLL Clock */
234 if ((mcfr & CKGR_MCFR_MAINRDY) &&
235 (at91sam7_info->ext_freq == 0))
236 {
237 target_read_u32(target, CKGR_PLLR, &pllr);
238 if (!(pllr & CKGR_PLLR_DIV))
239 break; /* 0 Hz */
240 at91sam7_info->mck_valid = 1;
241 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
242 /* Integer arithmetic should have sufficient precision
243 * as long as PLL is properly configured. */
244 tmp = mainfreq / (pllr & CKGR_PLLR_DIV)*
245 (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
246 }
247 else if ((at91sam7_info->ext_freq != 0) &&
248 ((pllr&CKGR_PLLR_DIV) != 0))
249 {
250 at91sam7_info->mck_valid = 1;
251 tmp = at91sam7_info->ext_freq / (pllr&CKGR_PLLR_DIV)*
252 (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
253 }
254 break;
255 }
256
257 /* Prescaler adjust */
258 if ((((mckr & PMC_MCKR_PRES) >> 2) == 7) || (tmp == 0))
259 {
260 at91sam7_info->mck_valid = 0;
261 at91sam7_info->mck_freq = 0;
262 }
263 else if (((mckr & PMC_MCKR_PRES) >> 2) != 0)
264 at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
265 else
266 at91sam7_info->mck_freq = tmp;
267 }
268
269 /* Setup the timimg registers for nvbits or normal flash */
270 static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode)
271 {
272 uint32_t fmr, fmcn = 0, fws = 0;
273 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
274 struct target *target = bank->target;
275
276 if (mode && (mode != at91sam7_info->flashmode))
277 {
278 /* Always round up (ceil) */
279 if (mode == FMR_TIMING_NVBITS)
280 {
281 if (at91sam7_info->cidr_arch == 0x60)
282 {
283 /* AT91SAM7A3 uses master clocks in 100 ns */
284 fmcn = (at91sam7_info->mck_freq/10000000ul) + 1;
285 }
286 else
287 {
288 /* master clocks in 1uS for ARCH 0x7 types */
289 fmcn = (at91sam7_info->mck_freq/1000000ul) + 1;
290 }
291 }
292 else if (mode == FMR_TIMING_FLASH)
293 {
294 /* main clocks in 1.5uS */
295 fmcn = (at91sam7_info->mck_freq/1000000ul)+
296 (at91sam7_info->mck_freq/2000000ul) + 1;
297 }
298
299 /* hard overclocking */
300 if (fmcn > 0xFF)
301 fmcn = 0xFF;
302
303 /* Only allow fmcn = 0 if clock period is > 30 us = 33kHz. */
304 if (at91sam7_info->mck_freq <= 33333ul)
305 fmcn = 0;
306 /* Only allow fws = 0 if clock frequency is < 30 MHz. */
307 if (at91sam7_info->mck_freq > 30000000ul)
308 fws = 1;
309
310 LOG_DEBUG("fmcn[%i]: %i", bank->bank_number, (int)(fmcn));
311 fmr = fmcn << 16 | fws << 8;
312 target_write_u32(target, MC_FMR[bank->bank_number], fmr);
313 }
314
315 at91sam7_info->flashmode = mode;
316 }
317
318 static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout)
319 {
320 uint32_t status;
321
322 while ((!((status = at91sam7_get_flash_status(bank->target, bank->bank_number)) & waitbits)) && (timeout-- > 0))
323 {
324 LOG_DEBUG("status[%i]: 0x%" PRIx32 "", (int)bank->bank_number, status);
325 alive_sleep(1);
326 }
327
328 LOG_DEBUG("status[%i]: 0x%" PRIx32 "", bank->bank_number, status);
329
330 if (status & 0x0C)
331 {
332 LOG_ERROR("status register: 0x%" PRIx32 "", status);
333 if (status & 0x4)
334 LOG_ERROR("Lock Error Bit Detected, Operation Abort");
335 if (status & 0x8)
336 LOG_ERROR("Invalid command and/or bad keyword, Operation Abort");
337 if (status & 0x10)
338 LOG_ERROR("Security Bit Set, Operation Abort");
339 }
340
341 return status;
342 }
343
344 /* Send one command to the AT91SAM flash controller */
345 static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen)
346 {
347 uint32_t fcr;
348 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
349 struct target *target = bank->target;
350
351 fcr = (0x5A << 24) | ((pagen&0x3FF) << 8) | cmd;
352 target_write_u32(target, MC_FCR[bank->bank_number], fcr);
353 LOG_DEBUG("Flash command: 0x%" PRIx32 ", flash bank: %i, page number: %u", fcr, bank->bank_number + 1, pagen);
354
355 if ((at91sam7_info->cidr_arch == 0x60) && ((cmd == SLB) | (cmd == CLB)))
356 {
357 /* Lock bit manipulation on AT91SAM7A3 waits for FC_FSR bit 1, EOL */
358 if (at91sam7_wait_status_busy(bank, MC_FSR_EOL, 10)&0x0C)
359 {
360 return ERROR_FLASH_OPERATION_FAILED;
361 }
362 return ERROR_OK;
363 }
364
365 if (at91sam7_wait_status_busy(bank, MC_FSR_FRDY, 10)&0x0C)
366 {
367 return ERROR_FLASH_OPERATION_FAILED;
368 }
369
370 return ERROR_OK;
371 }
372
373 /* Read device id register, main clock frequency register and fill in driver info structure */
374 static int at91sam7_read_part_info(struct flash_bank *bank)
375 {
376 struct flash_bank *t_bank = bank;
377 struct at91sam7_flash_bank *at91sam7_info;
378 struct target *target = t_bank->target;
379
380 uint16_t bnk, sec;
381 uint16_t arch;
382 uint32_t cidr;
383 uint8_t banks_num = 0;
384 uint16_t num_nvmbits = 0;
385 uint16_t sectors_num = 0;
386 uint16_t pages_per_sector = 0;
387 uint16_t page_size = 0;
388 uint32_t ext_freq;
389 uint32_t bank_size;
390 uint32_t base_address = 0;
391 char *target_name_t = "Unknown";
392
393 at91sam7_info = t_bank->driver_priv;
394
395 if (at91sam7_info->cidr != 0)
396 {
397 /* flash already configured, update clock and check for protected sectors */
398 struct flash_bank *fb = bank;
399 t_bank = fb;
400
401 while (t_bank)
402 {
403 /* re-calculate master clock frequency */
404 at91sam7_read_clock_info(t_bank);
405
406 /* no timming */
407 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
408
409 /* check protect state */
410 at91sam7_protect_check(t_bank);
411
412 t_bank = fb->next;
413 fb = t_bank;
414 }
415
416 return ERROR_OK;
417 }
418
419 /* Read and parse chip identification register */
420 target_read_u32(target, DBGU_CIDR, &cidr);
421 if (cidr == 0)
422 {
423 LOG_WARNING("Cannot identify target as an AT91SAM");
424 return ERROR_FLASH_OPERATION_FAILED;
425 }
426
427 if (at91sam7_info->flash_autodetection == 0)
428 {
429 /* banks and sectors are already created, based on data from input file */
430 struct flash_bank *fb = bank;
431 t_bank = fb;
432 while (t_bank)
433 {
434 at91sam7_info = t_bank->driver_priv;
435
436 at91sam7_info->cidr = cidr;
437 at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
438 at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
439 at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
440 at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
441 at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
442 at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
443 at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
444 at91sam7_info->cidr_version = cidr&0x001F;
445
446 /* calculate master clock frequency */
447 at91sam7_read_clock_info(t_bank);
448
449 /* no timming */
450 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
451
452 /* check protect state */
453 at91sam7_protect_check(t_bank);
454
455 t_bank = fb->next;
456 fb = t_bank;
457 }
458
459 return ERROR_OK;
460 }
461
462 arch = (cidr >> 20)&0x00FF;
463
464 /* check flash size */
465 switch ((cidr >> 8)&0x000F)
466 {
467 case FLASH_SIZE_8KB:
468 break;
469
470 case FLASH_SIZE_16KB:
471 banks_num = 1;
472 sectors_num = 8;
473 pages_per_sector = 32;
474 page_size = 64;
475 base_address = 0x00100000;
476 if (arch == 0x70)
477 {
478 num_nvmbits = 2;
479 target_name_t = "AT91SAM7S161/16";
480 }
481 break;
482
483 case FLASH_SIZE_32KB:
484 banks_num = 1;
485 sectors_num = 8;
486 pages_per_sector = 32;
487 page_size = 128;
488 base_address = 0x00100000;
489 if (arch == 0x70)
490 {
491 num_nvmbits = 2;
492 target_name_t = "AT91SAM7S321/32";
493 }
494 if (arch == 0x72)
495 {
496 num_nvmbits = 3;
497 target_name_t = "AT91SAM7SE32";
498 }
499 break;
500
501 case FLASH_SIZE_64KB:
502 banks_num = 1;
503 sectors_num = 16;
504 pages_per_sector = 32;
505 page_size = 128;
506 base_address = 0x00100000;
507 if (arch == 0x70)
508 {
509 num_nvmbits = 2;
510 target_name_t = "AT91SAM7S64";
511 }
512 break;
513
514 case FLASH_SIZE_128KB:
515 banks_num = 1;
516 sectors_num = 8;
517 pages_per_sector = 64;
518 page_size = 256;
519 base_address = 0x00100000;
520 if (arch == 0x70)
521 {
522 num_nvmbits = 2;
523 target_name_t = "AT91SAM7S128";
524 }
525 if (arch == 0x71)
526 {
527 num_nvmbits = 3;
528 target_name_t = "AT91SAM7XC128";
529 }
530 if (arch == 0x72)
531 {
532 num_nvmbits = 3;
533 target_name_t = "AT91SAM7SE128";
534 }
535 if (arch == 0x75)
536 {
537 num_nvmbits = 3;
538 target_name_t = "AT91SAM7X128";
539 }
540 break;
541
542 case FLASH_SIZE_256KB:
543 banks_num = 1;
544 sectors_num = 16;
545 pages_per_sector = 64;
546 page_size = 256;
547 base_address = 0x00100000;
548 if (arch == 0x60)
549 {
550 num_nvmbits = 3;
551 target_name_t = "AT91SAM7A3";
552 }
553 if (arch == 0x70)
554 {
555 num_nvmbits = 2;
556 target_name_t = "AT91SAM7S256";
557 }
558 if (arch == 0x71)
559 {
560 num_nvmbits = 3;
561 target_name_t = "AT91SAM7XC256";
562 }
563 if (arch == 0x72)
564 {
565 num_nvmbits = 3;
566 target_name_t = "AT91SAM7SE256";
567 }
568 if (arch == 0x75)
569 {
570 num_nvmbits = 3;
571 target_name_t = "AT91SAM7X256";
572 }
573 break;
574
575 case FLASH_SIZE_512KB:
576 banks_num = 2;
577 sectors_num = 16;
578 pages_per_sector = 64;
579 page_size = 256;
580 base_address = 0x00100000;
581 if (arch == 0x70)
582 {
583 num_nvmbits = 2;
584 target_name_t = "AT91SAM7S512";
585 }
586 if (arch == 0x71)
587 {
588 num_nvmbits = 3;
589 target_name_t = "AT91SAM7XC512";
590 }
591 if (arch == 0x72)
592 {
593 num_nvmbits = 3;
594 target_name_t = "AT91SAM7SE512";
595 }
596 if (arch == 0x75)
597 {
598 num_nvmbits = 3;
599 target_name_t = "AT91SAM7X512";
600 }
601 break;
602
603 case FLASH_SIZE_1024KB:
604 break;
605
606 case FLASH_SIZE_2048KB:
607 break;
608 }
609
610 if (strcmp(target_name_t, "Unknown") == 0)
611 {
612 LOG_ERROR("Target autodetection failed! Please specify target parameters in configuration file");
613 return ERROR_FLASH_OPERATION_FAILED;
614 }
615
616 ext_freq = at91sam7_info->ext_freq;
617
618 /* calculate bank size */
619 bank_size = sectors_num * pages_per_sector * page_size;
620
621 for (bnk = 0; bnk < banks_num; bnk++)
622 {
623 if (bnk > 0)
624 {
625 /* create a new flash bank element */
626 struct flash_bank *fb = malloc(sizeof(struct flash_bank));
627 fb->target = target;
628 fb->driver = bank->driver;
629 fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
630 fb->next = NULL;
631
632 /* link created bank in 'flash_banks' list and redirect t_bank */
633 t_bank->next = fb;
634 t_bank = fb;
635 }
636
637 t_bank->bank_number = bnk;
638 t_bank->base = base_address + bnk * bank_size;
639 t_bank->size = bank_size;
640 t_bank->chip_width = 0;
641 t_bank->bus_width = 4;
642 t_bank->num_sectors = sectors_num;
643
644 /* allocate sectors */
645 t_bank->sectors = malloc(sectors_num * sizeof(struct flash_sector));
646 for (sec = 0; sec < sectors_num; sec++)
647 {
648 t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
649 t_bank->sectors[sec].size = pages_per_sector * page_size;
650 t_bank->sectors[sec].is_erased = -1;
651 t_bank->sectors[sec].is_protected = -1;
652 }
653
654 at91sam7_info = t_bank->driver_priv;
655
656 at91sam7_info->cidr = cidr;
657 at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
658 at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
659 at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
660 at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
661 at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
662 at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
663 at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
664 at91sam7_info->cidr_version = cidr&0x001F;
665
666 at91sam7_info->target_name = target_name_t;
667 at91sam7_info->flashmode = 0;
668 at91sam7_info->ext_freq = ext_freq;
669 at91sam7_info->num_nvmbits = num_nvmbits;
670 at91sam7_info->num_nvmbits_on = 0;
671 at91sam7_info->pagesize = page_size;
672 at91sam7_info->pages_per_sector = pages_per_sector;
673
674 /* calculate master clock frequency */
675 at91sam7_read_clock_info(t_bank);
676
677 /* no timming */
678 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
679
680 /* check protect state */
681 at91sam7_protect_check(t_bank);
682 }
683
684 LOG_DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x", at91sam7_info->cidr_nvptyp, at91sam7_info->cidr_arch);
685
686 return ERROR_OK;
687 }
688
689 static int at91sam7_erase_check(struct flash_bank *bank)
690 {
691 struct target *target = bank->target;
692 uint16_t retval;
693 uint32_t blank;
694 uint16_t fast_check;
695 uint8_t *buffer;
696 uint16_t nSector;
697 uint16_t nByte;
698
699 if (bank->target->state != TARGET_HALTED)
700 {
701 LOG_ERROR("Target not halted");
702 return ERROR_TARGET_NOT_HALTED;
703 }
704
705 /* Configure the flash controller timing */
706 at91sam7_read_clock_info(bank);
707 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
708
709 fast_check = 1;
710 for (nSector = 0; nSector < bank->num_sectors; nSector++)
711 {
712 retval = target_blank_check_memory(target, bank->base + bank->sectors[nSector].offset,
713 bank->sectors[nSector].size, &blank);
714 if (retval != ERROR_OK)
715 {
716 fast_check = 0;
717 break;
718 }
719 if (blank == 0xFF)
720 bank->sectors[nSector].is_erased = 1;
721 else
722 bank->sectors[nSector].is_erased = 0;
723 }
724
725 if (fast_check)
726 {
727 return ERROR_OK;
728 }
729
730 LOG_USER("Running slow fallback erase check - add working memory");
731
732 buffer = malloc(bank->sectors[0].size);
733 for (nSector = 0; nSector < bank->num_sectors; nSector++)
734 {
735 bank->sectors[nSector].is_erased = 1;
736 retval = target_read_memory(target, bank->base + bank->sectors[nSector].offset, 4,
737 bank->sectors[nSector].size/4, buffer);
738 if (retval != ERROR_OK)
739 return retval;
740
741 for (nByte = 0; nByte < bank->sectors[nSector].size; nByte++)
742 {
743 if (buffer[nByte] != 0xFF)
744 {
745 bank->sectors[nSector].is_erased = 0;
746 break;
747 }
748 }
749 }
750 free(buffer);
751
752 return ERROR_OK;
753 }
754
755 static int at91sam7_protect_check(struct flash_bank *bank)
756 {
757 uint8_t lock_pos, gpnvm_pos;
758 uint32_t status;
759
760 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
761
762 if (at91sam7_info->cidr == 0)
763 {
764 return ERROR_FLASH_BANK_NOT_PROBED;
765 }
766 if (bank->target->state != TARGET_HALTED)
767 {
768 LOG_ERROR("Target not halted");
769 return ERROR_TARGET_NOT_HALTED;
770 }
771
772 status = at91sam7_get_flash_status(bank->target, bank->bank_number);
773 at91sam7_info->lockbits = (status >> 16);
774
775 at91sam7_info->num_lockbits_on = 0;
776 for (lock_pos = 0; lock_pos < bank->num_sectors; lock_pos++)
777 {
778 if (((status >> (16 + lock_pos))&(0x0001)) == 1)
779 {
780 at91sam7_info->num_lockbits_on++;
781 bank->sectors[lock_pos].is_protected = 1;
782 }
783 else
784 bank->sectors[lock_pos].is_protected = 0;
785 }
786
787 /* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
788 status = at91sam7_get_flash_status(bank->target, 0);
789
790 at91sam7_info->securitybit = (status >> 4)&0x01;
791 at91sam7_info->nvmbits = (status >> 8)&0xFF;
792
793 at91sam7_info->num_nvmbits_on = 0;
794 for (gpnvm_pos = 0; gpnvm_pos < at91sam7_info->num_nvmbits; gpnvm_pos++)
795 {
796 if (((status >> (8 + gpnvm_pos))&(0x01)) == 1)
797 {
798 at91sam7_info->num_nvmbits_on++;
799 }
800 }
801
802 return ERROR_OK;
803 }
804
805 FLASH_BANK_COMMAND_HANDLER(at91sam7_flash_bank_command)
806 {
807 struct flash_bank *t_bank = bank;
808 struct at91sam7_flash_bank *at91sam7_info;
809 struct target *target = t_bank->target;
810
811 uint32_t base_address;
812 uint32_t bank_size;
813 uint32_t ext_freq = 0;
814
815 int chip_width;
816 int bus_width;
817 int banks_num;
818 int num_sectors;
819
820 uint16_t pages_per_sector;
821 uint16_t page_size;
822 uint16_t num_nvmbits;
823
824 char *target_name_t;
825
826 int bnk, sec;
827
828 at91sam7_info = malloc(sizeof(struct at91sam7_flash_bank));
829 t_bank->driver_priv = at91sam7_info;
830
831 /* part wasn't probed for info yet */
832 at91sam7_info->cidr = 0;
833 at91sam7_info->flashmode = 0;
834 at91sam7_info->ext_freq = 0;
835 at91sam7_info->flash_autodetection = 0;
836
837 if (CMD_ARGC < 13)
838 {
839 at91sam7_info->flash_autodetection = 1;
840 return ERROR_OK;
841 }
842
843 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], base_address);
844
845 COMMAND_PARSE_NUMBER(int, CMD_ARGV[3], chip_width);
846 COMMAND_PARSE_NUMBER(int, CMD_ARGV[4], bus_width);
847
848 COMMAND_PARSE_NUMBER(int, CMD_ARGV[8], banks_num);
849 COMMAND_PARSE_NUMBER(int, CMD_ARGV[9], num_sectors);
850 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[10], pages_per_sector);
851 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[11], page_size);
852 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[12], num_nvmbits);
853
854 if (CMD_ARGC == 14) {
855 unsigned long freq;
856 COMMAND_PARSE_NUMBER(ulong, CMD_ARGV[13], freq);
857 ext_freq = freq * 1000;
858 at91sam7_info->ext_freq = ext_freq;
859 }
860
861 if ((bus_width == 0) || (banks_num == 0) || (num_sectors == 0) ||
862 (pages_per_sector == 0) || (page_size == 0) || (num_nvmbits == 0))
863 {
864 at91sam7_info->flash_autodetection = 1;
865 return ERROR_OK;
866 }
867
868 target_name_t = calloc(strlen(CMD_ARGV[7]) + 1, sizeof(char));
869 strcpy(target_name_t, CMD_ARGV[7]);
870
871 /* calculate bank size */
872 bank_size = num_sectors * pages_per_sector * page_size;
873
874 for (bnk = 0; bnk < banks_num; bnk++)
875 {
876 if (bnk > 0)
877 {
878 /* create a new bank element */
879 struct flash_bank *fb = malloc(sizeof(struct flash_bank));
880 fb->target = target;
881 fb->driver = bank->driver;
882 fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
883 fb->next = NULL;
884
885 /* link created bank in 'flash_banks' list and redirect t_bank */
886 t_bank->next = fb;
887 t_bank = fb;
888 }
889
890 t_bank->bank_number = bnk;
891 t_bank->base = base_address + bnk * bank_size;
892 t_bank->size = bank_size;
893 t_bank->chip_width = chip_width;
894 t_bank->bus_width = bus_width;
895 t_bank->num_sectors = num_sectors;
896
897 /* allocate sectors */
898 t_bank->sectors = malloc(num_sectors * sizeof(struct flash_sector));
899 for (sec = 0; sec < num_sectors; sec++)
900 {
901 t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
902 t_bank->sectors[sec].size = pages_per_sector * page_size;
903 t_bank->sectors[sec].is_erased = -1;
904 t_bank->sectors[sec].is_protected = -1;
905 }
906
907 at91sam7_info = t_bank->driver_priv;
908
909 at91sam7_info->target_name = target_name_t;
910 at91sam7_info->flashmode = 0;
911 at91sam7_info->ext_freq = ext_freq;
912 at91sam7_info->num_nvmbits = num_nvmbits;
913 at91sam7_info->num_nvmbits_on = 0;
914 at91sam7_info->pagesize = page_size;
915 at91sam7_info->pages_per_sector = pages_per_sector;
916 }
917
918 return ERROR_OK;
919 }
920
921 static int at91sam7_erase(struct flash_bank *bank, int first, int last)
922 {
923 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
924 int sec;
925 uint32_t nbytes, pos;
926 uint8_t *buffer;
927 uint8_t erase_all;
928
929 if (at91sam7_info->cidr == 0)
930 {
931 return ERROR_FLASH_BANK_NOT_PROBED;
932 }
933
934 if (bank->target->state != TARGET_HALTED)
935 {
936 LOG_ERROR("Target not halted");
937 return ERROR_TARGET_NOT_HALTED;
938 }
939
940 if ((first < 0) || (last < first) || (last >= bank->num_sectors))
941 {
942 return ERROR_FLASH_SECTOR_INVALID;
943 }
944
945 erase_all = 0;
946 if ((first == 0) && (last == (bank->num_sectors-1)))
947 {
948 erase_all = 1;
949 }
950
951 /* Configure the flash controller timing */
952 at91sam7_read_clock_info(bank);
953 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
954
955 if (erase_all)
956 {
957 if (at91sam7_flash_command(bank, EA, 0) != ERROR_OK)
958 {
959 return ERROR_FLASH_OPERATION_FAILED;
960 }
961 }
962 else
963 {
964 /* allocate and clean buffer */
965 nbytes = (last - first + 1) * bank->sectors[first].size;
966 buffer = malloc(nbytes * sizeof(uint8_t));
967 for (pos = 0; pos < nbytes; pos++)
968 {
969 buffer[pos] = 0xFF;
970 }
971
972 if (at91sam7_write(bank, buffer, bank->sectors[first].offset, nbytes) != ERROR_OK)
973 {
974 return ERROR_FLASH_OPERATION_FAILED;
975 }
976
977 free(buffer);
978 }
979
980 /* mark erased sectors */
981 for (sec = first; sec <= last; sec++)
982 {
983 bank->sectors[sec].is_erased = 1;
984 }
985
986 return ERROR_OK;
987 }
988
989 static int at91sam7_protect(struct flash_bank *bank, int set, int first, int last)
990 {
991 uint32_t cmd;
992 int sector;
993 uint32_t pagen;
994
995 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
996
997 if (at91sam7_info->cidr == 0)
998 {
999 return ERROR_FLASH_BANK_NOT_PROBED;
1000 }
1001
1002 if (bank->target->state != TARGET_HALTED)
1003 {
1004 LOG_ERROR("Target not halted");
1005 return ERROR_TARGET_NOT_HALTED;
1006 }
1007
1008 if ((first < 0) || (last < first) || (last >= bank->num_sectors))
1009 {
1010 return ERROR_FLASH_SECTOR_INVALID;
1011 }
1012
1013 /* Configure the flash controller timing */
1014 at91sam7_read_clock_info(bank);
1015 at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
1016
1017 for (sector = first; sector <= last; sector++)
1018 {
1019 if (set)
1020 cmd = SLB;
1021 else
1022 cmd = CLB;
1023
1024 /* if we lock a page from one sector then entire sector will be locked, also,
1025 * if we unlock a page from a locked sector, entire sector will be unlocked */
1026 pagen = sector * at91sam7_info->pages_per_sector;
1027
1028 if (at91sam7_flash_command(bank, cmd, pagen) != ERROR_OK)
1029 {
1030 return ERROR_FLASH_OPERATION_FAILED;
1031 }
1032 }
1033
1034 at91sam7_protect_check(bank);
1035
1036 return ERROR_OK;
1037 }
1038
1039 static int at91sam7_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
1040 {
1041 int retval;
1042 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
1043 struct target *target = bank->target;
1044 uint32_t dst_min_alignment, wcount, bytes_remaining = count;
1045 uint32_t first_page, last_page, pagen, buffer_pos;
1046
1047 if (at91sam7_info->cidr == 0)
1048 {
1049 return ERROR_FLASH_BANK_NOT_PROBED;
1050 }
1051
1052 if (bank->target->state != TARGET_HALTED)
1053 {
1054 LOG_ERROR("Target not halted");
1055 return ERROR_TARGET_NOT_HALTED;
1056 }
1057
1058 if (offset + count > bank->size)
1059 return ERROR_FLASH_DST_OUT_OF_BANK;
1060
1061 dst_min_alignment = at91sam7_info->pagesize;
1062
1063 if (offset % dst_min_alignment)
1064 {
1065 LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32 "", offset, dst_min_alignment);
1066 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
1067 }
1068
1069 if (at91sam7_info->cidr_arch == 0)
1070 return ERROR_FLASH_BANK_NOT_PROBED;
1071
1072 first_page = offset/dst_min_alignment;
1073 last_page = DIV_ROUND_UP(offset + count, dst_min_alignment);
1074
1075 LOG_DEBUG("first_page: %i, last_page: %i, count %i", (int)first_page, (int)last_page, (int)count);
1076
1077 /* Configure the flash controller timing */
1078 at91sam7_read_clock_info(bank);
1079 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
1080
1081 for (pagen = first_page; pagen < last_page; pagen++)
1082 {
1083 if (bytes_remaining < dst_min_alignment)
1084 count = bytes_remaining;
1085 else
1086 count = dst_min_alignment;
1087 bytes_remaining -= count;
1088
1089 /* Write one block to the PageWriteBuffer */
1090 buffer_pos = (pagen-first_page)*dst_min_alignment;
1091 wcount = DIV_ROUND_UP(count,4);
1092 if ((retval = target_write_memory(target, bank->base + pagen*dst_min_alignment, 4, wcount, buffer + buffer_pos)) != ERROR_OK)
1093 {
1094 return retval;
1095 }
1096
1097 /* Send Write Page command to Flash Controller */
1098 if (at91sam7_flash_command(bank, WP, pagen) != ERROR_OK)
1099 {
1100 return ERROR_FLASH_OPERATION_FAILED;
1101 }
1102 LOG_DEBUG("Write flash bank:%i page number:%" PRIi32 "", bank->bank_number, pagen);
1103 }
1104
1105 return ERROR_OK;
1106 }
1107
1108 static int at91sam7_probe(struct flash_bank *bank)
1109 {
1110 /* we can't probe on an at91sam7
1111 * if this is an at91sam7, it has the configured flash */
1112 int retval;
1113
1114 if (bank->target->state != TARGET_HALTED)
1115 {
1116 LOG_ERROR("Target not halted");
1117 return ERROR_TARGET_NOT_HALTED;
1118 }
1119
1120 retval = at91sam7_read_part_info(bank);
1121 if (retval != ERROR_OK)
1122 return retval;
1123
1124 return ERROR_OK;
1125 }
1126
1127 static int get_at91sam7_info(struct flash_bank *bank, char *buf, int buf_size)
1128 {
1129 int printed;
1130 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
1131
1132 if (at91sam7_info->cidr == 0)
1133 {
1134 return ERROR_FLASH_BANK_NOT_PROBED;
1135 }
1136
1137 printed = snprintf(buf, buf_size,
1138 "\n at91sam7 driver information: Chip is %s\n",
1139 at91sam7_info->target_name);
1140
1141 buf += printed;
1142 buf_size -= printed;
1143
1144 printed = snprintf(buf,
1145 buf_size,
1146 " Cidr: 0x%8.8" PRIx32 " | Arch: 0x%4.4x | Eproc: %s | Version: 0x%3.3x | Flashsize: 0x%8.8" PRIx32 "\n",
1147 at91sam7_info->cidr,
1148 at91sam7_info->cidr_arch,
1149 EPROC[at91sam7_info->cidr_eproc],
1150 at91sam7_info->cidr_version,
1151 bank->size);
1152
1153 buf += printed;
1154 buf_size -= printed;
1155
1156 printed = snprintf(buf, buf_size,
1157 " Master clock (estimated): %u KHz | External clock: %u KHz\n",
1158 (unsigned)(at91sam7_info->mck_freq / 1000), (unsigned)(at91sam7_info->ext_freq / 1000));
1159
1160 buf += printed;
1161 buf_size -= printed;
1162
1163 printed = snprintf(buf, buf_size,
1164 " Pagesize: %i bytes | Lockbits(%i): %i 0x%4.4x | Pages in lock region: %i \n",
1165 at91sam7_info->pagesize, bank->num_sectors, at91sam7_info->num_lockbits_on,
1166 at91sam7_info->lockbits, at91sam7_info->pages_per_sector*at91sam7_info->num_lockbits_on);
1167
1168 buf += printed;
1169 buf_size -= printed;
1170
1171 printed = snprintf(buf, buf_size,
1172 " Securitybit: %i | Nvmbits(%i): %i 0x%1.1x\n",
1173 at91sam7_info->securitybit, at91sam7_info->num_nvmbits,
1174 at91sam7_info->num_nvmbits_on, at91sam7_info->nvmbits);
1175
1176 buf += printed;
1177 buf_size -= printed;
1178
1179 return ERROR_OK;
1180 }
1181
1182 /*
1183 * On AT91SAM7S: When the gpnvm bits are set with
1184 * > at91sam7 gpnvm bitnr set
1185 * the changes are not visible in the flash controller status register MC_FSR
1186 * until the processor has been reset.
1187 * On the Olimex board this requires a power cycle.
1188 * Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
1189 * The maximum number of write/erase cycles for Non volatile Memory bits is 100. this includes
1190 * Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
1191 */
1192 COMMAND_HANDLER(at91sam7_handle_gpnvm_command)
1193 {
1194 struct flash_bank *bank;
1195 int bit;
1196 uint8_t flashcmd;
1197 uint32_t status;
1198 struct at91sam7_flash_bank *at91sam7_info;
1199 int retval;
1200
1201 if (CMD_ARGC != 2)
1202 {
1203 command_print(CMD_CTX, "at91sam7 gpnvm <bit> <set | clear>");
1204 return ERROR_OK;
1205 }
1206
1207 bank = get_flash_bank_by_num_noprobe(0);
1208 if (bank == NULL)
1209 {
1210 return ERROR_FLASH_BANK_INVALID;
1211 }
1212 if (strcmp(bank->driver->name, "at91sam7"))
1213 {
1214 command_print(CMD_CTX, "not an at91sam7 flash bank '%s'", CMD_ARGV[0]);
1215 return ERROR_FLASH_BANK_INVALID;
1216 }
1217 if (bank->target->state != TARGET_HALTED)
1218 {
1219 LOG_ERROR("target has to be halted to perform flash operation");
1220 return ERROR_TARGET_NOT_HALTED;
1221 }
1222
1223 if (strcmp(CMD_ARGV[1], "set") == 0)
1224 {
1225 flashcmd = SGPB;
1226 }
1227 else if (strcmp(CMD_ARGV[1], "clear") == 0)
1228 {
1229 flashcmd = CGPB;
1230 }
1231 else
1232 {
1233 return ERROR_COMMAND_SYNTAX_ERROR;
1234 }
1235
1236 at91sam7_info = bank->driver_priv;
1237 if (at91sam7_info->cidr == 0)
1238 {
1239 retval = at91sam7_read_part_info(bank);
1240 if (retval != ERROR_OK)
1241 {
1242 return retval;
1243 }
1244 }
1245
1246 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], bit);
1247 if ((bit < 0) || (bit >= at91sam7_info->num_nvmbits))
1248 {
1249 command_print(CMD_CTX, "gpnvm bit '#%s' is out of bounds for target %s", CMD_ARGV[0], at91sam7_info->target_name);
1250 return ERROR_OK;
1251 }
1252
1253 /* Configure the flash controller timing */
1254 at91sam7_read_clock_info(bank);
1255 at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
1256
1257 if (at91sam7_flash_command(bank, flashcmd, bit) != ERROR_OK)
1258 {
1259 return ERROR_FLASH_OPERATION_FAILED;
1260 }
1261
1262 /* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
1263 status = at91sam7_get_flash_status(bank->target, 0);
1264 LOG_DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value %d, status 0x%" PRIx32 " \n", flashcmd, bit, status);
1265
1266 /* check protect state */
1267 at91sam7_protect_check(bank);
1268
1269 return ERROR_OK;
1270 }
1271
1272 static const struct command_registration at91sam7_exec_command_handlers[] = {
1273 {
1274 .name = "gpnvm",
1275 .handler = at91sam7_handle_gpnvm_command,
1276 .mode = COMMAND_EXEC,
1277 .help = "set or clear one General Purpose Non-Volatile Memory "
1278 "(gpnvm) bit",
1279 .usage = "bitnum ('set'|'clear')",
1280 },
1281 COMMAND_REGISTRATION_DONE
1282 };
1283 static const struct command_registration at91sam7_command_handlers[] = {
1284 {
1285 .name = "at91sam7",
1286 .mode = COMMAND_ANY,
1287 .help = "at91sam7 flash command group",
1288 .chain = at91sam7_exec_command_handlers,
1289 },
1290 COMMAND_REGISTRATION_DONE
1291 };
1292
1293 struct flash_driver at91sam7_flash = {
1294 .name = "at91sam7",
1295 .commands = at91sam7_command_handlers,
1296 .flash_bank_command = at91sam7_flash_bank_command,
1297 .erase = at91sam7_erase,
1298 .protect = at91sam7_protect,
1299 .write = at91sam7_write,
1300 .read = default_flash_read,
1301 .probe = at91sam7_probe,
1302 .auto_probe = at91sam7_probe,
1303 .erase_check = at91sam7_erase_check,
1304 .protect_check = at91sam7_protect_check,
1305 .info = get_at91sam7_info,
1306 };
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