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src/flash/nor/at91sam3|4l|7: fix clang static analyzer warnings
[openocd.git] / src / flash / nor / at91sam7.c
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, see <http://www.gnu.org/licenses/>. *
19 ****************************************************************************/
20
21 /***************************************************************************
22 *
23 * New flash setup command:
24 *
25 * flash bank <driver> <base_addr> <size> <chip_width> <bus_width> <target_id>
26 * [<chip_type> <banks>
27 * <sectors_per_bank> <pages_per_sector>
28 * <page_size> <num_nvmbits>
29 * <ext_freq_khz>]
30 *
31 * <ext_freq_khz> - MUST be used if clock is from external source,
32 * CAN be used if main oscillator frequency is known (recommended)
33 * Examples:
34 * ==== RECOMMENDED (covers clock speed) ============
35 * flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 25000
36 * (if auto-detect fails; provides clock spec)
37 * flash bank at91sam7 0 0 0 0 $_TARGETNAME 0 0 0 0 0 0 25000
38 * (auto-detect everything except the clock)
39 * ==== NOT RECOMMENDED !!! (clock speed is not configured) ====
40 * flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 0
41 * (if auto-detect fails)
42 * flash bank at91sam7 0 0 0 0 $_TARGETNAME
43 * (old style, auto-detect everything)
44 ****************************************************************************/
45
46 #ifdef HAVE_CONFIG_H
47 #include "config.h"
48 #endif
49
50 #include "imp.h"
51 #include <helper/binarybuffer.h>
52
53 /* AT91SAM7 control registers */
54 #define DBGU_CIDR 0xFFFFF240
55 #define CKGR_MCFR 0xFFFFFC24
56 #define CKGR_MOR 0xFFFFFC20
57 #define CKGR_MCFR_MAINRDY 0x10000
58 #define CKGR_PLLR 0xFFFFFC2c
59 #define CKGR_PLLR_DIV 0xff
60 #define CKGR_PLLR_MUL 0x07ff0000
61 #define PMC_MCKR 0xFFFFFC30
62 #define PMC_MCKR_CSS 0x03
63 #define PMC_MCKR_PRES 0x1c
64
65 /* Flash Controller Commands */
66 #define WP 0x01
67 #define SLB 0x02
68 #define WPL 0x03
69 #define CLB 0x04
70 #define EA 0x08
71 #define SGPB 0x0B
72 #define CGPB 0x0D
73 #define SSB 0x0F
74
75 /* MC_FSR bit definitions */
76 #define MC_FSR_FRDY 1
77 #define MC_FSR_EOL 2
78
79 /* AT91SAM7 constants */
80 #define RC_FREQ 32000
81
82 /* Flash timing modes */
83 #define FMR_TIMING_NONE 0
84 #define FMR_TIMING_NVBITS 1
85 #define FMR_TIMING_FLASH 2
86
87 /* Flash size constants */
88 #define FLASH_SIZE_8KB 1
89 #define FLASH_SIZE_16KB 2
90 #define FLASH_SIZE_32KB 3
91 #define FLASH_SIZE_64KB 5
92 #define FLASH_SIZE_128KB 7
93 #define FLASH_SIZE_256KB 9
94 #define FLASH_SIZE_512KB 10
95 #define FLASH_SIZE_1024KB 12
96 #define FLASH_SIZE_2048KB 14
97
98 static int at91sam7_protect_check(struct flash_bank *bank);
99 static int at91sam7_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset,
100 uint32_t count);
101
102 static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number);
103 static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode);
104 static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout);
105 static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen);
106
107 static const uint32_t MC_FMR[4] = { 0xFFFFFF60, 0xFFFFFF70, 0xFFFFFF80, 0xFFFFFF90 };
108 static const uint32_t MC_FCR[4] = { 0xFFFFFF64, 0xFFFFFF74, 0xFFFFFF84, 0xFFFFFF94 };
109 static const uint32_t MC_FSR[4] = { 0xFFFFFF68, 0xFFFFFF78, 0xFFFFFF88, 0xFFFFFF98 };
110
111 static const char *EPROC[8] = {
112 "Unknown", "ARM946-E", "ARM7TDMI", "Unknown", "ARM920T", "ARM926EJ-S", "Unknown", "Unknown"
113 };
114
115 struct at91sam7_flash_bank {
116 /* chip id register */
117 uint32_t cidr;
118 uint16_t cidr_ext;
119 uint16_t cidr_nvptyp;
120 uint16_t cidr_arch;
121 uint16_t cidr_sramsiz;
122 uint16_t cidr_nvpsiz;
123 uint16_t cidr_nvpsiz2;
124 uint16_t cidr_eproc;
125 uint16_t cidr_version;
126 const char *target_name;
127
128 /* flash auto-detection */
129 uint8_t flash_autodetection;
130
131 /* flash geometry */
132 uint16_t pages_per_sector;
133 uint16_t pagesize;
134 uint16_t pages_in_lockregion;
135
136 /* nv memory bits */
137 uint16_t num_lockbits_on;
138 uint16_t lockbits;
139 uint16_t num_nvmbits;
140 uint16_t num_nvmbits_on;
141 uint16_t nvmbits;
142 uint8_t securitybit;
143
144 /* 0: not init
145 * 1: fmcn for nvbits (1uS)
146 * 2: fmcn for flash (1.5uS) */
147 uint8_t flashmode;
148
149 /* main clock status */
150 uint8_t mck_valid;
151 uint32_t mck_freq;
152
153 /* external clock frequency */
154 uint32_t ext_freq;
155
156 };
157
158 #if 0
159 static long SRAMSIZ[16] = {
160 -1,
161 0x0400, /* 1K */
162 0x0800, /* 2K */
163 -1,
164 0x1c000, /* 112K */
165 0x1000, /* 4K */
166 0x14000, /* 80K */
167 0x28000, /* 160K */
168 0x2000, /* 8K */
169 0x4000, /* 16K */
170 0x8000, /* 32K */
171 0x10000, /* 64K */
172 0x20000, /* 128K */
173 0x40000, /* 256K */
174 0x18000, /* 96K */
175 0x80000, /* 512K */
176 };
177 #endif
178
179 static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number)
180 {
181 uint32_t fsr;
182 target_read_u32(target, MC_FSR[bank_number], &fsr);
183
184 return fsr;
185 }
186
187 /* Read clock configuration and set at91sam7_info->mck_freq */
188 static void at91sam7_read_clock_info(struct flash_bank *bank)
189 {
190 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
191 struct target *target = bank->target;
192 uint32_t mckr, mcfr, pllr, mor;
193 unsigned long tmp = 0, mainfreq;
194
195 /* Read Clock Generator Main Oscillator Register */
196 target_read_u32(target, CKGR_MOR, &mor);
197 /* Read Clock Generator Main Clock Frequency Register */
198 target_read_u32(target, CKGR_MCFR, &mcfr);
199 /* Read Master Clock Register*/
200 target_read_u32(target, PMC_MCKR, &mckr);
201 /* Read Clock Generator PLL Register */
202 target_read_u32(target, CKGR_PLLR, &pllr);
203
204 at91sam7_info->mck_valid = 0;
205 at91sam7_info->mck_freq = 0;
206 switch (mckr & PMC_MCKR_CSS) {
207 case 0: /* Slow Clock */
208 at91sam7_info->mck_valid = 1;
209 tmp = RC_FREQ;
210 break;
211
212 case 1: /* Main Clock */
213 if ((mcfr & CKGR_MCFR_MAINRDY) &&
214 (at91sam7_info->ext_freq == 0)) {
215 at91sam7_info->mck_valid = 1;
216 tmp = RC_FREQ / 16ul * (mcfr & 0xffff);
217 } else if (at91sam7_info->ext_freq != 0) {
218 at91sam7_info->mck_valid = 1;
219 tmp = at91sam7_info->ext_freq;
220 }
221 break;
222
223 case 2: /* Reserved */
224 break;
225
226 case 3: /* PLL Clock */
227 if ((mcfr & CKGR_MCFR_MAINRDY) &&
228 (at91sam7_info->ext_freq == 0)) {
229 target_read_u32(target, CKGR_PLLR, &pllr);
230 if (!(pllr & CKGR_PLLR_DIV))
231 break; /* 0 Hz */
232 at91sam7_info->mck_valid = 1;
233 mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
234 /* Integer arithmetic should have sufficient precision
235 * as long as PLL is properly configured. */
236 tmp = mainfreq / (pllr & CKGR_PLLR_DIV)*
237 (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
238 } else if ((at91sam7_info->ext_freq != 0) &&
239 ((pllr&CKGR_PLLR_DIV) != 0)) {
240 at91sam7_info->mck_valid = 1;
241 tmp = at91sam7_info->ext_freq / (pllr&CKGR_PLLR_DIV)*
242 (((pllr & CKGR_PLLR_MUL) >> 16) + 1);
243 }
244 break;
245 }
246
247 /* Prescaler adjust */
248 if ((((mckr & PMC_MCKR_PRES) >> 2) == 7) || (tmp == 0)) {
249 at91sam7_info->mck_valid = 0;
250 at91sam7_info->mck_freq = 0;
251 } else if (((mckr & PMC_MCKR_PRES) >> 2) != 0)
252 at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
253 else
254 at91sam7_info->mck_freq = tmp;
255 }
256
257 /* Setup the timimg registers for nvbits or normal flash */
258 static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode)
259 {
260 uint32_t fmr, fmcn = 0, fws = 0;
261 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
262 struct target *target = bank->target;
263
264 if (mode && (mode != at91sam7_info->flashmode)) {
265 /* Always round up (ceil) */
266 if (mode == FMR_TIMING_NVBITS) {
267 if (at91sam7_info->cidr_arch == 0x60) {
268 /* AT91SAM7A3 uses master clocks in 100 ns */
269 fmcn = (at91sam7_info->mck_freq/10000000ul) + 1;
270 } else {
271 /* master clocks in 1uS for ARCH 0x7 types */
272 fmcn = (at91sam7_info->mck_freq/1000000ul) + 1;
273 }
274 } else if (mode == FMR_TIMING_FLASH) {
275 /* main clocks in 1.5uS */
276 fmcn = (at91sam7_info->mck_freq/1000000ul)+
277 (at91sam7_info->mck_freq/2000000ul) + 1;
278 }
279
280 /* hard overclocking */
281 if (fmcn > 0xFF)
282 fmcn = 0xFF;
283
284 /* Only allow fmcn = 0 if clock period is > 30 us = 33kHz. */
285 if (at91sam7_info->mck_freq <= 33333ul)
286 fmcn = 0;
287 /* Only allow fws = 0 if clock frequency is < 30 MHz. */
288 if (at91sam7_info->mck_freq > 30000000ul)
289 fws = 1;
290
291 LOG_DEBUG("fmcn[%i]: %i", bank->bank_number, (int)(fmcn));
292 fmr = fmcn << 16 | fws << 8;
293 target_write_u32(target, MC_FMR[bank->bank_number], fmr);
294 }
295
296 at91sam7_info->flashmode = mode;
297 }
298
299 static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout)
300 {
301 uint32_t status;
302
303 while ((!((status = at91sam7_get_flash_status(bank->target,
304 bank->bank_number)) & waitbits)) && (timeout-- > 0)) {
305 LOG_DEBUG("status[%i]: 0x%" PRIx32 "", (int)bank->bank_number, status);
306 alive_sleep(1);
307 }
308
309 LOG_DEBUG("status[%i]: 0x%" PRIx32 "", bank->bank_number, status);
310
311 if (status & 0x0C) {
312 LOG_ERROR("status register: 0x%" PRIx32 "", status);
313 if (status & 0x4)
314 LOG_ERROR("Lock Error Bit Detected, Operation Abort");
315 if (status & 0x8)
316 LOG_ERROR("Invalid command and/or bad keyword, Operation Abort");
317 if (status & 0x10)
318 LOG_ERROR("Security Bit Set, Operation Abort");
319 }
320
321 return status;
322 }
323
324 /* Send one command to the AT91SAM flash controller */
325 static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen)
326 {
327 uint32_t fcr;
328 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
329 struct target *target = bank->target;
330
331 fcr = (0x5A << 24) | ((pagen&0x3FF) << 8) | cmd;
332 target_write_u32(target, MC_FCR[bank->bank_number], fcr);
333 LOG_DEBUG("Flash command: 0x%" PRIx32 ", flash bank: %i, page number: %u",
334 fcr,
335 bank->bank_number + 1,
336 pagen);
337
338 if ((at91sam7_info->cidr_arch == 0x60) && ((cmd == SLB) | (cmd == CLB))) {
339 /* Lock bit manipulation on AT91SAM7A3 waits for FC_FSR bit 1, EOL */
340 if (at91sam7_wait_status_busy(bank, MC_FSR_EOL, 10)&0x0C)
341 return ERROR_FLASH_OPERATION_FAILED;
342 return ERROR_OK;
343 }
344
345 if (at91sam7_wait_status_busy(bank, MC_FSR_FRDY, 10)&0x0C)
346 return ERROR_FLASH_OPERATION_FAILED;
347
348 return ERROR_OK;
349 }
350
351 /* Read device id register, main clock frequency register and fill in driver info structure */
352 static int at91sam7_read_part_info(struct flash_bank *bank)
353 {
354 struct at91sam7_flash_bank *at91sam7_info;
355 struct target *target = bank->target;
356
357 uint16_t bnk, sec;
358 uint16_t arch;
359 uint32_t cidr;
360 uint8_t banks_num = 0;
361 uint16_t num_nvmbits = 0;
362 uint16_t sectors_num = 0;
363 uint16_t pages_per_sector = 0;
364 uint16_t page_size = 0;
365 uint32_t ext_freq;
366 uint32_t bank_size;
367 uint32_t base_address = 0;
368 char *target_name_t = "Unknown";
369
370 at91sam7_info = bank->driver_priv;
371
372 if (at91sam7_info->cidr != 0) {
373 /* flash already configured, update clock and check for protected sectors */
374 for (struct flash_bank *t_bank = bank; t_bank; t_bank = t_bank->next) {
375 if (t_bank->target != target)
376 continue;
377 /* re-calculate master clock frequency */
378 at91sam7_read_clock_info(t_bank);
379
380 /* no timming */
381 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
382
383 /* check protect state */
384 at91sam7_protect_check(t_bank);
385 }
386
387 return ERROR_OK;
388 }
389
390 /* Read and parse chip identification register */
391 target_read_u32(target, DBGU_CIDR, &cidr);
392 if (cidr == 0) {
393 LOG_WARNING("Cannot identify target as an AT91SAM");
394 return ERROR_FLASH_OPERATION_FAILED;
395 }
396
397 if (at91sam7_info->flash_autodetection == 0) {
398 /* banks and sectors are already created, based on data from input file */
399 for (struct flash_bank *t_bank = bank; t_bank; t_bank = t_bank->next) {
400 if (t_bank->target != target)
401 continue;
402
403 at91sam7_info = t_bank->driver_priv;
404
405 at91sam7_info->cidr = cidr;
406 at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
407 at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
408 at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
409 at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
410 at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
411 at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
412 at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
413 at91sam7_info->cidr_version = cidr&0x001F;
414
415 /* calculate master clock frequency */
416 at91sam7_read_clock_info(t_bank);
417
418 /* no timming */
419 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
420
421 /* check protect state */
422 at91sam7_protect_check(t_bank);
423 }
424
425 return ERROR_OK;
426 }
427
428 arch = (cidr >> 20)&0x00FF;
429
430 /* check flash size */
431 switch ((cidr >> 8)&0x000F) {
432 case FLASH_SIZE_8KB:
433 break;
434
435 case FLASH_SIZE_16KB:
436 banks_num = 1;
437 sectors_num = 8;
438 pages_per_sector = 32;
439 page_size = 64;
440 base_address = 0x00100000;
441 if (arch == 0x70) {
442 num_nvmbits = 2;
443 target_name_t = "AT91SAM7S161/16";
444 }
445 break;
446
447 case FLASH_SIZE_32KB:
448 banks_num = 1;
449 sectors_num = 8;
450 pages_per_sector = 32;
451 page_size = 128;
452 base_address = 0x00100000;
453 if (arch == 0x70) {
454 num_nvmbits = 2;
455 target_name_t = "AT91SAM7S321/32";
456 }
457 if (arch == 0x72) {
458 num_nvmbits = 3;
459 target_name_t = "AT91SAM7SE32";
460 }
461 break;
462
463 case FLASH_SIZE_64KB:
464 banks_num = 1;
465 sectors_num = 16;
466 pages_per_sector = 32;
467 page_size = 128;
468 base_address = 0x00100000;
469 if (arch == 0x70) {
470 num_nvmbits = 2;
471 target_name_t = "AT91SAM7S64";
472 }
473 break;
474
475 case FLASH_SIZE_128KB:
476 banks_num = 1;
477 sectors_num = 8;
478 pages_per_sector = 64;
479 page_size = 256;
480 base_address = 0x00100000;
481 if (arch == 0x70) {
482 num_nvmbits = 2;
483 target_name_t = "AT91SAM7S128";
484 }
485 if (arch == 0x71) {
486 num_nvmbits = 3;
487 target_name_t = "AT91SAM7XC128";
488 }
489 if (arch == 0x72) {
490 num_nvmbits = 3;
491 target_name_t = "AT91SAM7SE128";
492 }
493 if (arch == 0x75) {
494 num_nvmbits = 3;
495 target_name_t = "AT91SAM7X128";
496 }
497 break;
498
499 case FLASH_SIZE_256KB:
500 banks_num = 1;
501 sectors_num = 16;
502 pages_per_sector = 64;
503 page_size = 256;
504 base_address = 0x00100000;
505 if (arch == 0x60) {
506 num_nvmbits = 3;
507 target_name_t = "AT91SAM7A3";
508 }
509 if (arch == 0x70) {
510 num_nvmbits = 2;
511 target_name_t = "AT91SAM7S256";
512 }
513 if (arch == 0x71) {
514 num_nvmbits = 3;
515 target_name_t = "AT91SAM7XC256";
516 }
517 if (arch == 0x72) {
518 num_nvmbits = 3;
519 target_name_t = "AT91SAM7SE256";
520 }
521 if (arch == 0x75) {
522 num_nvmbits = 3;
523 target_name_t = "AT91SAM7X256";
524 }
525 break;
526
527 case FLASH_SIZE_512KB:
528 banks_num = 2;
529 sectors_num = 16;
530 pages_per_sector = 64;
531 page_size = 256;
532 base_address = 0x00100000;
533 if (arch == 0x70) {
534 num_nvmbits = 2;
535 target_name_t = "AT91SAM7S512";
536 }
537 if (arch == 0x71) {
538 num_nvmbits = 3;
539 target_name_t = "AT91SAM7XC512";
540 }
541 if (arch == 0x72) {
542 num_nvmbits = 3;
543 target_name_t = "AT91SAM7SE512";
544 }
545 if (arch == 0x75) {
546 num_nvmbits = 3;
547 target_name_t = "AT91SAM7X512";
548 }
549 break;
550
551 case FLASH_SIZE_1024KB:
552 break;
553
554 case FLASH_SIZE_2048KB:
555 break;
556 }
557
558 if (strcmp(target_name_t, "Unknown") == 0) {
559 LOG_ERROR(
560 "Target autodetection failed! Please specify target parameters in configuration file");
561 return ERROR_FLASH_OPERATION_FAILED;
562 }
563
564 ext_freq = at91sam7_info->ext_freq;
565
566 /* calculate bank size */
567 bank_size = sectors_num * pages_per_sector * page_size;
568
569 for (bnk = 0; bnk < banks_num; bnk++) {
570 struct flash_bank *t_bank = bank;
571 if (bnk > 0) {
572 if (!t_bank->next) {
573 /* create a new flash bank element */
574 struct flash_bank *fb = malloc(sizeof(struct flash_bank));
575 fb->target = target;
576 fb->driver = bank->driver;
577 fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
578 fb->name = "sam7_probed";
579 fb->next = NULL;
580
581 /* link created bank in 'flash_banks' list */
582 t_bank->next = fb;
583 }
584 t_bank = t_bank->next;
585 }
586
587 t_bank->bank_number = bnk;
588 t_bank->base = base_address + bnk * bank_size;
589 t_bank->size = bank_size;
590 t_bank->chip_width = 0;
591 t_bank->bus_width = 4;
592 t_bank->num_sectors = sectors_num;
593
594 /* allocate sectors */
595 t_bank->sectors = malloc(sectors_num * sizeof(struct flash_sector));
596 for (sec = 0; sec < sectors_num; sec++) {
597 t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
598 t_bank->sectors[sec].size = pages_per_sector * page_size;
599 t_bank->sectors[sec].is_erased = -1;
600 t_bank->sectors[sec].is_protected = -1;
601 }
602
603 at91sam7_info = t_bank->driver_priv;
604
605 at91sam7_info->cidr = cidr;
606 at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
607 at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
608 at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
609 at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
610 at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
611 at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
612 at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
613 at91sam7_info->cidr_version = cidr&0x001F;
614
615 at91sam7_info->target_name = target_name_t;
616 at91sam7_info->flashmode = 0;
617 at91sam7_info->ext_freq = ext_freq;
618 at91sam7_info->num_nvmbits = num_nvmbits;
619 at91sam7_info->num_nvmbits_on = 0;
620 at91sam7_info->pagesize = page_size;
621 at91sam7_info->pages_per_sector = pages_per_sector;
622
623 /* calculate master clock frequency */
624 at91sam7_read_clock_info(t_bank);
625
626 /* no timming */
627 at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
628
629 /* check protect state */
630 at91sam7_protect_check(t_bank);
631 }
632
633 LOG_DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x",
634 at91sam7_info->cidr_nvptyp,
635 at91sam7_info->cidr_arch);
636
637 return ERROR_OK;
638 }
639
640 static int at91sam7_erase_check(struct flash_bank *bank)
641 {
642 if (bank->target->state != TARGET_HALTED) {
643 LOG_ERROR("Target not halted");
644 return ERROR_TARGET_NOT_HALTED;
645 }
646
647 /* Configure the flash controller timing */
648 at91sam7_read_clock_info(bank);
649 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
650
651 return default_flash_blank_check(bank);
652 }
653
654 static int at91sam7_protect_check(struct flash_bank *bank)
655 {
656 uint8_t lock_pos, gpnvm_pos;
657 uint32_t status;
658
659 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
660
661 if (at91sam7_info->cidr == 0)
662 return ERROR_FLASH_BANK_NOT_PROBED;
663 if (bank->target->state != TARGET_HALTED) {
664 LOG_ERROR("Target not halted");
665 return ERROR_TARGET_NOT_HALTED;
666 }
667
668 status = at91sam7_get_flash_status(bank->target, bank->bank_number);
669 at91sam7_info->lockbits = (status >> 16);
670
671 at91sam7_info->num_lockbits_on = 0;
672 for (lock_pos = 0; lock_pos < bank->num_sectors; lock_pos++) {
673 if (((status >> (16 + lock_pos))&(0x0001)) == 1) {
674 at91sam7_info->num_lockbits_on++;
675 bank->sectors[lock_pos].is_protected = 1;
676 } else
677 bank->sectors[lock_pos].is_protected = 0;
678 }
679
680 /* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
681 status = at91sam7_get_flash_status(bank->target, 0);
682
683 at91sam7_info->securitybit = (status >> 4)&0x01;
684 at91sam7_info->nvmbits = (status >> 8)&0xFF;
685
686 at91sam7_info->num_nvmbits_on = 0;
687 for (gpnvm_pos = 0; gpnvm_pos < at91sam7_info->num_nvmbits; gpnvm_pos++) {
688 if (((status >> (8 + gpnvm_pos))&(0x01)) == 1)
689 at91sam7_info->num_nvmbits_on++;
690 }
691
692 return ERROR_OK;
693 }
694
695 FLASH_BANK_COMMAND_HANDLER(at91sam7_flash_bank_command)
696 {
697 struct flash_bank *t_bank = bank;
698 struct at91sam7_flash_bank *at91sam7_info;
699 struct target *target = t_bank->target;
700
701 uint32_t base_address;
702 uint32_t bank_size;
703 uint32_t ext_freq = 0;
704
705 int chip_width;
706 int bus_width;
707 int banks_num;
708 int num_sectors;
709
710 uint16_t pages_per_sector;
711 uint16_t page_size;
712 uint16_t num_nvmbits;
713
714 int bnk, sec;
715
716 at91sam7_info = malloc(sizeof(struct at91sam7_flash_bank));
717 t_bank->driver_priv = at91sam7_info;
718
719 /* part wasn't probed for info yet */
720 at91sam7_info->cidr = 0;
721 at91sam7_info->flashmode = 0;
722 at91sam7_info->ext_freq = 0;
723 at91sam7_info->flash_autodetection = 0;
724
725 if (CMD_ARGC < 13) {
726 at91sam7_info->flash_autodetection = 1;
727 return ERROR_OK;
728 }
729
730 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], base_address);
731
732 COMMAND_PARSE_NUMBER(int, CMD_ARGV[3], chip_width);
733 COMMAND_PARSE_NUMBER(int, CMD_ARGV[4], bus_width);
734
735 COMMAND_PARSE_NUMBER(int, CMD_ARGV[8], banks_num);
736 COMMAND_PARSE_NUMBER(int, CMD_ARGV[9], num_sectors);
737 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[10], pages_per_sector);
738 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[11], page_size);
739 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[12], num_nvmbits);
740
741 if (CMD_ARGC == 14) {
742 unsigned long freq;
743 COMMAND_PARSE_NUMBER(ulong, CMD_ARGV[13], freq);
744 ext_freq = freq * 1000;
745 at91sam7_info->ext_freq = ext_freq;
746 }
747
748 if ((bus_width == 0) || (banks_num == 0) || (num_sectors == 0) ||
749 (pages_per_sector == 0) || (page_size == 0) || (num_nvmbits == 0)) {
750 at91sam7_info->flash_autodetection = 1;
751 return ERROR_OK;
752 }
753
754 /* calculate bank size */
755 bank_size = num_sectors * pages_per_sector * page_size;
756
757 for (bnk = 0; bnk < banks_num; bnk++) {
758 if (bnk > 0) {
759 if (!t_bank->next) {
760 /* create a new bank element */
761 struct flash_bank *fb = malloc(sizeof(struct flash_bank));
762 fb->target = target;
763 fb->driver = bank->driver;
764 fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
765 fb->name = "sam7_probed";
766 fb->next = NULL;
767
768 /* link created bank in 'flash_banks' list */
769 t_bank->next = fb;
770 }
771 t_bank = t_bank->next;
772 }
773
774 t_bank->bank_number = bnk;
775 t_bank->base = base_address + bnk * bank_size;
776 t_bank->size = bank_size;
777 t_bank->chip_width = chip_width;
778 t_bank->bus_width = bus_width;
779 t_bank->num_sectors = num_sectors;
780
781 /* allocate sectors */
782 t_bank->sectors = malloc(num_sectors * sizeof(struct flash_sector));
783 for (sec = 0; sec < num_sectors; sec++) {
784 t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
785 t_bank->sectors[sec].size = pages_per_sector * page_size;
786 t_bank->sectors[sec].is_erased = -1;
787 t_bank->sectors[sec].is_protected = -1;
788 }
789
790 at91sam7_info = t_bank->driver_priv;
791
792 at91sam7_info->target_name = strdup(CMD_ARGV[7]);
793 at91sam7_info->flashmode = 0;
794 at91sam7_info->ext_freq = ext_freq;
795 at91sam7_info->num_nvmbits = num_nvmbits;
796 at91sam7_info->num_nvmbits_on = 0;
797 at91sam7_info->pagesize = page_size;
798 at91sam7_info->pages_per_sector = pages_per_sector;
799 }
800
801 return ERROR_OK;
802 }
803
804 static int at91sam7_erase(struct flash_bank *bank, int first, int last)
805 {
806 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
807 int sec;
808 uint32_t nbytes, pos;
809 uint8_t *buffer;
810 uint8_t erase_all;
811
812 if (at91sam7_info->cidr == 0)
813 return ERROR_FLASH_BANK_NOT_PROBED;
814
815 if (bank->target->state != TARGET_HALTED) {
816 LOG_ERROR("Target not halted");
817 return ERROR_TARGET_NOT_HALTED;
818 }
819
820 if ((first < 0) || (last < first) || (last >= bank->num_sectors))
821 return ERROR_FLASH_SECTOR_INVALID;
822
823 erase_all = 0;
824 if ((first == 0) && (last == (bank->num_sectors-1)))
825 erase_all = 1;
826
827 /* Configure the flash controller timing */
828 at91sam7_read_clock_info(bank);
829 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
830
831 if (erase_all) {
832 if (at91sam7_flash_command(bank, EA, 0) != ERROR_OK)
833 return ERROR_FLASH_OPERATION_FAILED;
834 } else {
835 /* allocate and clean buffer */
836 nbytes = (last - first + 1) * bank->sectors[first].size;
837 buffer = malloc(nbytes * sizeof(uint8_t));
838 for (pos = 0; pos < nbytes; pos++)
839 buffer[pos] = 0xFF;
840
841 if (at91sam7_write(bank, buffer, bank->sectors[first].offset, nbytes) != ERROR_OK) {
842 free(buffer);
843 return ERROR_FLASH_OPERATION_FAILED;
844 }
845
846 free(buffer);
847 }
848
849 /* mark erased sectors */
850 for (sec = first; sec <= last; sec++)
851 bank->sectors[sec].is_erased = 1;
852
853 return ERROR_OK;
854 }
855
856 static int at91sam7_protect(struct flash_bank *bank, int set, int first, int last)
857 {
858 uint32_t cmd;
859 int sector;
860 uint32_t pagen;
861
862 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
863
864 if (at91sam7_info->cidr == 0)
865 return ERROR_FLASH_BANK_NOT_PROBED;
866
867 if (bank->target->state != TARGET_HALTED) {
868 LOG_ERROR("Target not halted");
869 return ERROR_TARGET_NOT_HALTED;
870 }
871
872 if ((first < 0) || (last < first) || (last >= bank->num_sectors))
873 return ERROR_FLASH_SECTOR_INVALID;
874
875 /* Configure the flash controller timing */
876 at91sam7_read_clock_info(bank);
877 at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
878
879 for (sector = first; sector <= last; sector++) {
880 if (set)
881 cmd = SLB;
882 else
883 cmd = CLB;
884
885 /* if we lock a page from one sector then entire sector will be locked, also,
886 * if we unlock a page from a locked sector, entire sector will be unlocked */
887 pagen = sector * at91sam7_info->pages_per_sector;
888
889 if (at91sam7_flash_command(bank, cmd, pagen) != ERROR_OK)
890 return ERROR_FLASH_OPERATION_FAILED;
891 }
892
893 at91sam7_protect_check(bank);
894
895 return ERROR_OK;
896 }
897
898 static int at91sam7_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset, uint32_t count)
899 {
900 int retval;
901 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
902 struct target *target = bank->target;
903 uint32_t dst_min_alignment, wcount, bytes_remaining = count;
904 uint32_t first_page, last_page, pagen, buffer_pos;
905
906 if (at91sam7_info->cidr == 0)
907 return ERROR_FLASH_BANK_NOT_PROBED;
908
909 if (bank->target->state != TARGET_HALTED) {
910 LOG_ERROR("Target not halted");
911 return ERROR_TARGET_NOT_HALTED;
912 }
913
914 if (offset + count > bank->size)
915 return ERROR_FLASH_DST_OUT_OF_BANK;
916
917 dst_min_alignment = at91sam7_info->pagesize;
918
919 if (offset % dst_min_alignment) {
920 LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32 "",
921 offset,
922 dst_min_alignment);
923 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
924 }
925
926 if (at91sam7_info->cidr_arch == 0)
927 return ERROR_FLASH_BANK_NOT_PROBED;
928
929 first_page = offset/dst_min_alignment;
930 last_page = DIV_ROUND_UP(offset + count, dst_min_alignment);
931
932 LOG_DEBUG("first_page: %i, last_page: %i, count %i",
933 (int)first_page,
934 (int)last_page,
935 (int)count);
936
937 /* Configure the flash controller timing */
938 at91sam7_read_clock_info(bank);
939 at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
940
941 for (pagen = first_page; pagen < last_page; pagen++) {
942 if (bytes_remaining < dst_min_alignment)
943 count = bytes_remaining;
944 else
945 count = dst_min_alignment;
946 bytes_remaining -= count;
947
948 /* Write one block to the PageWriteBuffer */
949 buffer_pos = (pagen-first_page)*dst_min_alignment;
950 wcount = DIV_ROUND_UP(count, 4);
951 retval = target_write_memory(target, bank->base + pagen*dst_min_alignment, 4,
952 wcount, buffer + buffer_pos);
953 if (retval != ERROR_OK)
954 return retval;
955
956 /* Send Write Page command to Flash Controller */
957 if (at91sam7_flash_command(bank, WP, pagen) != ERROR_OK)
958 return ERROR_FLASH_OPERATION_FAILED;
959 LOG_DEBUG("Write flash bank:%i page number:%" PRIi32 "", bank->bank_number, pagen);
960 }
961
962 return ERROR_OK;
963 }
964
965 static int at91sam7_probe(struct flash_bank *bank)
966 {
967 /* we can't probe on an at91sam7
968 * if this is an at91sam7, it has the configured flash */
969 int retval;
970
971 if (bank->target->state != TARGET_HALTED) {
972 LOG_ERROR("Target not halted");
973 return ERROR_TARGET_NOT_HALTED;
974 }
975
976 retval = at91sam7_read_part_info(bank);
977 if (retval != ERROR_OK)
978 return retval;
979
980 return ERROR_OK;
981 }
982
983 static int get_at91sam7_info(struct flash_bank *bank, char *buf, int buf_size)
984 {
985 int printed;
986 struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
987
988 if (at91sam7_info->cidr == 0)
989 return ERROR_FLASH_BANK_NOT_PROBED;
990
991 printed = snprintf(buf, buf_size,
992 "\n at91sam7 driver information: Chip is %s\n",
993 at91sam7_info->target_name);
994
995 buf += printed;
996 buf_size -= printed;
997
998 printed = snprintf(buf,
999 buf_size,
1000 " Cidr: 0x%8.8" PRIx32 " | Arch: 0x%4.4x | Eproc: %s | Version: 0x%3.3x | "
1001 "Flashsize: 0x%8.8" PRIx32 "\n",
1002 at91sam7_info->cidr,
1003 at91sam7_info->cidr_arch,
1004 EPROC[at91sam7_info->cidr_eproc],
1005 at91sam7_info->cidr_version,
1006 bank->size);
1007
1008 buf += printed;
1009 buf_size -= printed;
1010
1011 printed = snprintf(buf, buf_size,
1012 " Master clock (estimated): %u KHz | External clock: %u KHz\n",
1013 (unsigned)(at91sam7_info->mck_freq / 1000),
1014 (unsigned)(at91sam7_info->ext_freq / 1000));
1015
1016 buf += printed;
1017 buf_size -= printed;
1018
1019 printed = snprintf(buf,
1020 buf_size,
1021 " Pagesize: %i bytes | Lockbits(%i): %i 0x%4.4x | Pages in lock region: %i\n",
1022 at91sam7_info->pagesize,
1023 bank->num_sectors,
1024 at91sam7_info->num_lockbits_on,
1025 at91sam7_info->lockbits,
1026 at91sam7_info->pages_per_sector*at91sam7_info->num_lockbits_on);
1027
1028 buf += printed;
1029 buf_size -= printed;
1030
1031 snprintf(buf, buf_size,
1032 " Securitybit: %i | Nvmbits(%i): %i 0x%1.1x\n",
1033 at91sam7_info->securitybit, at91sam7_info->num_nvmbits,
1034 at91sam7_info->num_nvmbits_on, at91sam7_info->nvmbits);
1035
1036 return ERROR_OK;
1037 }
1038
1039 /*
1040 * On AT91SAM7S: When the gpnvm bits are set with
1041 * > at91sam7 gpnvm bitnr set
1042 * the changes are not visible in the flash controller status register MC_FSR
1043 * until the processor has been reset.
1044 * On the Olimex board this requires a power cycle.
1045 * Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
1046 * The maximum number of write/erase cycles for Non volatile Memory bits is 100. this includes
1047 * Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
1048 */
1049 COMMAND_HANDLER(at91sam7_handle_gpnvm_command)
1050 {
1051 struct flash_bank *bank;
1052 int bit;
1053 uint8_t flashcmd;
1054 uint32_t status;
1055 struct at91sam7_flash_bank *at91sam7_info;
1056 int retval;
1057
1058 if (CMD_ARGC != 2)
1059 return ERROR_COMMAND_SYNTAX_ERROR;
1060
1061 bank = get_flash_bank_by_num_noprobe(0);
1062 if (bank == NULL)
1063 return ERROR_FLASH_BANK_INVALID;
1064 if (strcmp(bank->driver->name, "at91sam7")) {
1065 command_print(CMD, "not an at91sam7 flash bank '%s'", CMD_ARGV[0]);
1066 return ERROR_FLASH_BANK_INVALID;
1067 }
1068 if (bank->target->state != TARGET_HALTED) {
1069 LOG_ERROR("target has to be halted to perform flash operation");
1070 return ERROR_TARGET_NOT_HALTED;
1071 }
1072
1073 if (strcmp(CMD_ARGV[1], "set") == 0)
1074 flashcmd = SGPB;
1075 else if (strcmp(CMD_ARGV[1], "clear") == 0)
1076 flashcmd = CGPB;
1077 else
1078 return ERROR_COMMAND_SYNTAX_ERROR;
1079
1080 at91sam7_info = bank->driver_priv;
1081 if (at91sam7_info->cidr == 0) {
1082 retval = at91sam7_read_part_info(bank);
1083 if (retval != ERROR_OK)
1084 return retval;
1085 }
1086
1087 COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], bit);
1088 if ((bit < 0) || (bit >= at91sam7_info->num_nvmbits)) {
1089 command_print(CMD,
1090 "gpnvm bit '#%s' is out of bounds for target %s",
1091 CMD_ARGV[0],
1092 at91sam7_info->target_name);
1093 return ERROR_OK;
1094 }
1095
1096 /* Configure the flash controller timing */
1097 at91sam7_read_clock_info(bank);
1098 at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
1099
1100 if (at91sam7_flash_command(bank, flashcmd, bit) != ERROR_OK)
1101 return ERROR_FLASH_OPERATION_FAILED;
1102
1103 /* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
1104 status = at91sam7_get_flash_status(bank->target, 0);
1105 LOG_DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value %d, status 0x%" PRIx32,
1106 flashcmd,
1107 bit,
1108 status);
1109
1110 /* check protect state */
1111 at91sam7_protect_check(bank);
1112
1113 return ERROR_OK;
1114 }
1115
1116 static const struct command_registration at91sam7_exec_command_handlers[] = {
1117 {
1118 .name = "gpnvm",
1119 .handler = at91sam7_handle_gpnvm_command,
1120 .mode = COMMAND_EXEC,
1121 .help = "set or clear one General Purpose Non-Volatile Memory "
1122 "(gpnvm) bit",
1123 .usage = "bitnum ('set'|'clear')",
1124 },
1125 COMMAND_REGISTRATION_DONE
1126 };
1127 static const struct command_registration at91sam7_command_handlers[] = {
1128 {
1129 .name = "at91sam7",
1130 .mode = COMMAND_ANY,
1131 .help = "at91sam7 flash command group",
1132 .usage = "",
1133 .chain = at91sam7_exec_command_handlers,
1134 },
1135 COMMAND_REGISTRATION_DONE
1136 };
1137
1138 const struct flash_driver at91sam7_flash = {
1139 .name = "at91sam7",
1140 .usage = "gpnvm <bit> <set | clear>",
1141 .commands = at91sam7_command_handlers,
1142 .flash_bank_command = at91sam7_flash_bank_command,
1143 .erase = at91sam7_erase,
1144 .protect = at91sam7_protect,
1145 .write = at91sam7_write,
1146 .read = default_flash_read,
1147 .probe = at91sam7_probe,
1148 .auto_probe = at91sam7_probe,
1149 .erase_check = at91sam7_erase_check,
1150 .protect_check = at91sam7_protect_check,
1151 .info = get_at91sam7_info,
1152 };
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