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arm920t: memory writes were broken when MMU was disabled
[openocd/genbsdl.git] / src / flash / stellaris.c
blobdfc276e2d5afdd78e08ae5d284cfa69929d25bde
1 /***************************************************************************
2 * Copyright (C) 2006 by Magnus Lundin *
3 * lundin@mlu.mine.nu *
4 * *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23
24 /***************************************************************************
25 * STELLARIS is tested on LM3S811, LM3S6965
26 ***************************************************************************/
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include "stellaris.h"
32 #include "armv7m.h"
33 #include "binarybuffer.h"
34
35
36 #define DID0_VER(did0) ((did0 >> 28)&0x07)
37 static int stellaris_register_commands(struct command_context_s *cmd_ctx);
38 static int stellaris_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank);
39 static int stellaris_erase(struct flash_bank_s *bank, int first, int last);
40 static int stellaris_protect(struct flash_bank_s *bank, int set, int first, int last);
41 static int stellaris_write(struct flash_bank_s *bank, uint8_t *buffer, uint32_t offset, uint32_t count);
42 static int stellaris_auto_probe(struct flash_bank_s *bank);
43 static int stellaris_probe(struct flash_bank_s *bank);
44 static int stellaris_protect_check(struct flash_bank_s *bank);
45 static int stellaris_info(struct flash_bank_s *bank, char *buf, int buf_size);
46
47 static int stellaris_read_part_info(struct flash_bank_s *bank);
48 static uint32_t stellaris_get_flash_status(flash_bank_t *bank);
49 static void stellaris_set_flash_mode(flash_bank_t *bank,int mode);
50 //static uint32_t stellaris_wait_status_busy(flash_bank_t *bank, uint32_t waitbits, int timeout);
51
52 static int stellaris_handle_mass_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
53 static int stellaris_mass_erase(struct flash_bank_s *bank);
54
55 flash_driver_t stellaris_flash =
56 {
57 .name = "stellaris",
58 .register_commands = stellaris_register_commands,
59 .flash_bank_command = stellaris_flash_bank_command,
60 .erase = stellaris_erase,
61 .protect = stellaris_protect,
62 .write = stellaris_write,
63 .probe = stellaris_probe,
64 .auto_probe = stellaris_auto_probe,
65 .erase_check = default_flash_mem_blank_check,
66 .protect_check = stellaris_protect_check,
67 .info = stellaris_info
68 };
69
70 static struct {
71 uint32_t partno;
72 char *partname;
73 } StellarisParts[] =
74 {
75 {0x01,"LM3S101"},
76 {0x02,"LM3S102"},
77 {0x03,"LM3S1625"},
78 {0x04,"LM3S1626"},
79 {0x05,"LM3S1627"},
80 {0x06,"LM3S1607"},
81 {0x10,"LM3S1776"},
82 {0x19,"LM3S300"},
83 {0x11,"LM3S301"},
84 {0x12,"LM3S310"},
85 {0x1A,"LM3S308"},
86 {0x13,"LM3S315"},
87 {0x14,"LM3S316"},
88 {0x17,"LM3S317"},
89 {0x18,"LM3S318"},
90 {0x15,"LM3S328"},
91 {0x2A,"LM3S600"},
92 {0x21,"LM3S601"},
93 {0x2B,"LM3S608"},
94 {0x22,"LM3S610"},
95 {0x23,"LM3S611"},
96 {0x24,"LM3S612"},
97 {0x25,"LM3S613"},
98 {0x26,"LM3S615"},
99 {0x28,"LM3S617"},
100 {0x29,"LM3S618"},
101 {0x27,"LM3S628"},
102 {0x38,"LM3S800"},
103 {0x31,"LM3S801"},
104 {0x39,"LM3S808"},
105 {0x32,"LM3S811"},
106 {0x33,"LM3S812"},
107 /*{0x33,"LM3S2616"},*/
108 {0x34,"LM3S815"},
109 {0x36,"LM3S817"},
110 {0x37,"LM3S818"},
111 {0x35,"LM3S828"},
112 {0x39,"LM3S2276"},
113 {0x3A,"LM3S2776"},
114 {0x43,"LM3S3651"},
115 {0x44,"LM3S3739"},
116 {0x45,"LM3S3749"},
117 {0x46,"LM3S3759"},
118 {0x48,"LM3S3768"},
119 {0x49,"LM3S3748"},
120 {0x50,"LM3S2678"},
121 {0x51,"LM3S2110"},
122 {0x52,"LM3S2739"},
123 {0x53,"LM3S2651"},
124 {0x54,"LM3S2939"},
125 {0x55,"LM3S2965"},
126 {0x56,"LM3S2432"},
127 {0x57,"LM3S2620"},
128 {0x58,"LM3S2950"},
129 {0x59,"LM3S2412"},
130 {0x5A,"LM3S2533"},
131 {0x61,"LM3S8630"},
132 {0x62,"LM3S8970"},
133 {0x63,"LM3S8730"},
134 {0x64,"LM3S8530"},
135 {0x65,"LM3S8930"},
136 {0x71,"LM3S6610"},
137 {0x72,"LM3S6950"},
138 {0x73,"LM3S6965"},
139 {0x74,"LM3S6110"},
140 {0x75,"LM3S6432"},
141 {0x76,"LM3S6537"},
142 {0x77,"LM3S6753"},
143 {0x78,"LM3S6952"},
144 {0x80,"LM3S2671"},
145 {0x81,"LM3S5632"},
146 {0x82,"LM3S6422"},
147 {0x83,"LM3S6633"},
148 {0x84,"LM3S2139"},
149 {0x85,"LM3S2637"},
150 {0x86,"LM3S8738"},
151 {0x88,"LM3S8938"},
152 {0x89,"LM3S6938"},
153 {0x8A,"LM3S5652"},
154 {0x8B,"LM3S6637"},
155 {0x8C,"LM3S8933"},
156 {0x8D,"LM3S8733"},
157 {0x8E,"LM3S8538"},
158 {0x8F,"LM3S2948"},
159 {0x91,"LM3S5662"},
160 {0x96,"LM3S5732"},
161 {0x97,"LM3S5737"},
162 {0x99,"LM3S5747"},
163 {0x9A,"LM3S5752"},
164 {0x9B,"LM3S5757"},
165 {0x9C,"LM3S5762"},
166 {0x9D,"LM3S5767"},
167 {0xA0,"LM3S5739"},
168 {0xA1,"LM3S6100"},
169 {0xA2,"LM3S2410"},
170 {0xA3,"LM3S6730"},
171 {0xA4,"LM3S2730"},
172 {0xA5,"LM3S6420"},
173 {0xA6,"LM3S8962"},
174 {0xA7,"LM3S5749"},
175 {0xA8,"LM3S5769"},
176 {0xA9,"LM3S5768"},
177 {0xB3,"LM3S1635"},
178 {0xB4,"LM3S1850"},
179 {0xB5,"LM3S1960"},
180 {0xB7,"LM3S1937"},
181 {0xB8,"LM3S1968"},
182 {0xB9,"LM3S1751"},
183 {0xBA,"LM3S1439"},
184 {0xBB,"LM3S1512"},
185 {0xBC,"LM3S1435"},
186 {0xBD,"LM3S1637"},
187 {0xBE,"LM3S1958"},
188 {0xBF,"LM3S1110"},
189 {0xC0,"LM3S1620"},
190 {0xC1,"LM3S1150"},
191 {0xC2,"LM3S1165"},
192 {0xC3,"LM3S1133"},
193 {0xC4,"LM3S1162"},
194 {0xC5,"LM3S1138"},
195 {0xC6,"LM3S1332"},
196 {0xC7,"LM3S1538"},
197 {0xD0,"LM3S6815"},
198 {0xD1,"LM3S6816"},
199 {0xD2,"LM3S6915"},
200 {0xD3,"LM3S6916"},
201 {0xD4,"LM3S2016"},
202 {0xD5,"LM3S1615"},
203 {0xD6,"LM3S1616"},
204 {0xD7,"LM3S8971"},
205 {0xD8,"LM3S1108"},
206 {0xD9,"LM3S1101"},
207 {0xDA,"LM3S1608"},
208 {0xDB,"LM3S1601"},
209 {0xDC,"LM3S1918"},
210 {0xDD,"LM3S1911"},
211 {0xDE,"LM3S2108"},
212 {0xDF,"LM3S2101"},
213 {0xE0,"LM3S2608"},
214 {0xE1,"LM3S2601"},
215 {0xE2,"LM3S2918"},
216 {0xE3,"LM3S2911"},
217 {0xE4,"LM3S6118"},
218 {0xE5,"LM3S6111"},
219 {0xE6,"LM3S6618"},
220 {0xE7,"LM3S6611"},
221 {0xE8,"LM3S6918"},
222 {0xE9,"LM3S6911"},
223 {0,"Unknown part"}
224 };
225
226 static char * StellarisClassname[5] =
227 {
228 "Sandstorm",
229 "Fury",
230 "Unknown",
231 "DustDevil",
232 "Tempest"
233 };
234
235 /***************************************************************************
236 * openocd command interface *
237 ***************************************************************************/
238
239 /* flash_bank stellaris <base> <size> 0 0 <target#>
240 */
241 static int stellaris_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct flash_bank_s *bank)
242 {
243 stellaris_flash_bank_t *stellaris_info;
244
245 if (argc < 6)
246 {
247 LOG_WARNING("incomplete flash_bank stellaris configuration");
248 return ERROR_FLASH_BANK_INVALID;
249 }
250
251 stellaris_info = calloc(sizeof(stellaris_flash_bank_t), 1);
252 bank->base = 0x0;
253 bank->driver_priv = stellaris_info;
254
255 stellaris_info->target_name = "Unknown target";
256
257 /* part wasn't probed for info yet */
258 stellaris_info->did1 = 0;
259
260 /* TODO Specify the main crystal speed in kHz using an optional
261 * argument; ditto, the speed of an external oscillator used
262 * instead of a crystal. Avoid programming flash using IOSC.
263 */
264 return ERROR_OK;
265 }
266
267 static int stellaris_register_commands(struct command_context_s *cmd_ctx)
268 {
269 command_t *stm32x_cmd = register_command(cmd_ctx, NULL, "stellaris", NULL, COMMAND_ANY, "stellaris flash specific commands");
270
271 register_command(cmd_ctx, stm32x_cmd, "mass_erase", stellaris_handle_mass_erase_command, COMMAND_EXEC, "mass erase device");
272 return ERROR_OK;
273 }
274
275 static int stellaris_info(struct flash_bank_s *bank, char *buf, int buf_size)
276 {
277 int printed, device_class;
278 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
279
280 stellaris_read_part_info(bank);
281
282 if (stellaris_info->did1 == 0)
283 {
284 printed = snprintf(buf, buf_size, "Cannot identify target as a Stellaris\n");
285 buf += printed;
286 buf_size -= printed;
287 return ERROR_FLASH_OPERATION_FAILED;
288 }
289
290 if (DID0_VER(stellaris_info->did0) > 0)
291 {
292 device_class = (stellaris_info->did0 >> 16) & 0xFF;
293 }
294 else
295 {
296 device_class = 0;
297 }
298 printed = snprintf(buf,
299 buf_size,
300 "\nTI/LMI Stellaris information: Chip is "
301 "class %i (%s) %s rev %c%i\n",
302 device_class,
303 StellarisClassname[device_class],
304 stellaris_info->target_name,
305 (int)('A' + ((stellaris_info->did0 >> 8) & 0xFF)),
306 (int)((stellaris_info->did0) & 0xFF));
307 buf += printed;
308 buf_size -= printed;
309
310 printed = snprintf(buf,
311 buf_size,
312 "did1: 0x%8.8" PRIx32 ", arch: 0x%4.4" PRIx32
313 ", eproc: %s, ramsize: %ik, flashsize: %ik\n",
314 stellaris_info->did1,
315 stellaris_info->did1,
316 "ARMv7M",
317 (int)((1 + ((stellaris_info->dc0 >> 16) & 0xFFFF))/4),
318 (int)((1 + (stellaris_info->dc0 & 0xFFFF))*2));
319 buf += printed;
320 buf_size -= printed;
321
322 printed = snprintf(buf,
323 buf_size,
324 "master clock: %ikHz%s, "
325 "rcc is 0x%" PRIx32 ", rcc2 is 0x%" PRIx32 "\n",
326 (int)(stellaris_info->mck_freq / 1000),
327 stellaris_info->mck_desc,
328 stellaris_info->rcc,
329 stellaris_info->rcc2);
330 buf += printed;
331 buf_size -= printed;
332
333 if (stellaris_info->num_lockbits > 0)
334 {
335 printed = snprintf(buf,
336 buf_size,
337 "pagesize: %" PRIi32 ", lockbits: %i 0x%4.4" PRIx32 ", pages in lock region: %i \n",
338 stellaris_info->pagesize,
339 stellaris_info->num_lockbits,
340 stellaris_info->lockbits,
341 (int)(stellaris_info->num_pages/stellaris_info->num_lockbits));
342 buf += printed;
343 buf_size -= printed;
344 }
345 return ERROR_OK;
346 }
347
348 /***************************************************************************
349 * chip identification and status *
350 ***************************************************************************/
351
352 static uint32_t stellaris_get_flash_status(flash_bank_t *bank)
353 {
354 target_t *target = bank->target;
355 uint32_t fmc;
356
357 target_read_u32(target, FLASH_CONTROL_BASE | FLASH_FMC, &fmc);
358
359 return fmc;
360 }
361
362 /** Read clock configuration and set stellaris_info->usec_clocks*/
363
364 static const unsigned rcc_xtal[32] = {
365 [0x00] = 1000000, /* no pll */
366 [0x01] = 1843200, /* no pll */
367 [0x02] = 2000000, /* no pll */
368 [0x03] = 2457600, /* no pll */
369
370 [0x04] = 3579545,
371 [0x05] = 3686400,
372 [0x06] = 4000000, /* usb */
373 [0x07] = 4096000,
374
375 [0x08] = 4915200,
376 [0x09] = 5000000, /* usb */
377 [0x0a] = 5120000,
378 [0x0b] = 6000000, /* (reset) usb */
379
380 [0x0c] = 6144000,
381 [0x0d] = 7372800,
382 [0x0e] = 8000000, /* usb */
383 [0x0f] = 8192000,
384
385 /* parts before DustDevil use just 4 bits for xtal spec */
386
387 [0x10] = 10000000, /* usb */
388 [0x11] = 12000000, /* usb */
389 [0x12] = 12288000,
390 [0x13] = 13560000,
391
392 [0x14] = 14318180,
393 [0x15] = 16000000, /* usb */
394 [0x16] = 16384000,
395 };
396
397 static void stellaris_read_clock_info(flash_bank_t *bank)
398 {
399 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
400 target_t *target = bank->target;
401 uint32_t rcc, rcc2, pllcfg, sysdiv, usesysdiv, bypass, oscsrc;
402 unsigned xtal;
403 unsigned long mainfreq;
404
405 target_read_u32(target, SCB_BASE | RCC, &rcc);
406 LOG_DEBUG("Stellaris RCC %" PRIx32 "", rcc);
407
408 target_read_u32(target, SCB_BASE | RCC2, &rcc2);
409 LOG_DEBUG("Stellaris RCC2 %" PRIx32 "", rcc);
410
411 target_read_u32(target, SCB_BASE | PLLCFG, &pllcfg);
412 LOG_DEBUG("Stellaris PLLCFG %" PRIx32 "", pllcfg);
413
414 stellaris_info->rcc = rcc;
415 stellaris_info->rcc = rcc2;
416
417 sysdiv = (rcc >> 23) & 0xF;
418 usesysdiv = (rcc >> 22) & 0x1;
419 bypass = (rcc >> 11) & 0x1;
420 oscsrc = (rcc >> 4) & 0x3;
421 xtal = (rcc >> 6) & stellaris_info->xtal_mask;
422
423 /* NOTE: post-Sandstorm parts have RCC2 which may override
424 * parts of RCC ... with more sysdiv options, option for
425 * 32768 Hz mainfreq, PLL controls. On Sandstorm it reads
426 * as zero, so the "use RCC2" flag is always clear.
427 */
428 if (rcc2 & (1 << 31)) {
429 sysdiv = (rcc2 >> 23) & 0x3F;
430 bypass = (rcc2 >> 11) & 0x1;
431 oscsrc = (rcc2 >> 4) & 0x7;
432
433 /* FIXME Tempest parts have an additional lsb for
434 * fractional sysdiv (200 MHz / 2.5 == 80 MHz)
435 */
436 }
437
438 stellaris_info->mck_desc = "";
439
440 switch (oscsrc)
441 {
442 case 0: /* MOSC */
443 mainfreq = rcc_xtal[xtal];
444 break;
445 case 1: /* IOSC */
446 mainfreq = stellaris_info->iosc_freq;
447 stellaris_info->mck_desc = stellaris_info->iosc_desc;
448 break;
449 case 2: /* IOSC/4 */
450 mainfreq = stellaris_info->iosc_freq / 4;
451 stellaris_info->mck_desc = stellaris_info->iosc_desc;
452 break;
453 case 3: /* lowspeed */
454 /* Sandstorm doesn't have this 30K +/- 30% osc */
455 mainfreq = 30000;
456 stellaris_info->mck_desc = " (±30%)";
457 break;
458 case 8: /* hibernation osc */
459 /* not all parts support hibernation */
460 mainfreq = 32768;
461 break;
462
463 default: /* NOTREACHED */
464 mainfreq = 0;
465 break;
466 }
467
468 /* PLL is used if it's not bypassed; its output is 200 MHz
469 * even when it runs at 400 MHz (adds divide-by-two stage).
470 */
471 if (!bypass)
472 mainfreq = 200000000;
473
474 if (usesysdiv)
475 stellaris_info->mck_freq = mainfreq/(1 + sysdiv);
476 else
477 stellaris_info->mck_freq = mainfreq;
478
479 /* Forget old flash timing */
480 stellaris_set_flash_mode(bank, 0);
481 }
482
483 /* Setup the timimg registers */
484 static void stellaris_set_flash_mode(flash_bank_t *bank,int mode)
485 {
486 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
487 target_t *target = bank->target;
488
489 uint32_t usecrl = (stellaris_info->mck_freq/1000000ul-1);
490 LOG_DEBUG("usecrl = %i",(int)(usecrl));
491 target_write_u32(target, SCB_BASE | USECRL, usecrl);
492 }
493
494 #if 0
495 static uint32_t stellaris_wait_status_busy(flash_bank_t *bank, uint32_t waitbits, int timeout)
496 {
497 uint32_t status;
498
499 /* Stellaris waits for cmdbit to clear */
500 while (((status = stellaris_get_flash_status(bank)) & waitbits) && (timeout-- > 0))
501 {
502 LOG_DEBUG("status: 0x%x", status);
503 alive_sleep(1);
504 }
505
506 /* Flash errors are reflected in the FLASH_CRIS register */
507
508 return status;
509 }
510
511 /* Send one command to the flash controller */
512 static int stellaris_flash_command(struct flash_bank_s *bank,uint8_t cmd,uint16_t pagen)
513 {
514 uint32_t fmc;
515 target_t *target = bank->target;
516
517 fmc = FMC_WRKEY | cmd;
518 target_write_u32(target, FLASH_CONTROL_BASE | FLASH_FMC, fmc);
519 LOG_DEBUG("Flash command: 0x%x", fmc);
520
521 if (stellaris_wait_status_busy(bank, cmd, 100))
522 {
523 return ERROR_FLASH_OPERATION_FAILED;
524 }
525
526 return ERROR_OK;
527 }
528 #endif
529
530 /* Read device id register, main clock frequency register and fill in driver info structure */
531 static int stellaris_read_part_info(struct flash_bank_s *bank)
532 {
533 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
534 target_t *target = bank->target;
535 uint32_t did0, did1, ver, fam, status;
536 int i;
537
538 /* Read and parse chip identification register */
539 target_read_u32(target, SCB_BASE | DID0, &did0);
540 target_read_u32(target, SCB_BASE | DID1, &did1);
541 target_read_u32(target, SCB_BASE | DC0, &stellaris_info->dc0);
542 target_read_u32(target, SCB_BASE | DC1, &stellaris_info->dc1);
543 LOG_DEBUG("did0 0x%" PRIx32 ", did1 0x%" PRIx32 ", dc0 0x%" PRIx32 ", dc1 0x%" PRIx32 "",
544 did0, did1, stellaris_info->dc0, stellaris_info->dc1);
545
546 ver = did0 >> 28;
547 if ((ver != 0) && (ver != 1))
548 {
549 LOG_WARNING("Unknown did0 version, cannot identify target");
550 return ERROR_FLASH_OPERATION_FAILED;
551 }
552
553 if (did1 == 0)
554 {
555 LOG_WARNING("Cannot identify target as a Stellaris");
556 return ERROR_FLASH_OPERATION_FAILED;
557 }
558
559 ver = did1 >> 28;
560 fam = (did1 >> 24) & 0xF;
561 if (((ver != 0) && (ver != 1)) || (fam != 0))
562 {
563 LOG_WARNING("Unknown did1 version/family, cannot positively identify target as a Stellaris");
564 }
565
566 /* For Sandstorm, Fury, DustDevil: current data sheets say IOSC
567 * is 12 MHz, but some older parts have 15 MHz. A few data sheets
568 * even give _both_ numbers! We'll use current numbers; IOSC is
569 * always approximate.
570 *
571 * For Tempest: IOSC is calibrated, 16 MHz
572 */
573 stellaris_info->iosc_freq = 12000000;
574 stellaris_info->iosc_desc = " (±30%)";
575 stellaris_info->xtal_mask = 0x0f;
576
577 switch ((did0 >> 28) & 0x7) {
578 case 0: /* Sandstorm */
579 /*
580 * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
581 * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
582 * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
583 */
584 if (((did0 >> 8) & 0xff) < 2) {
585 stellaris_info->iosc_freq = 15000000;
586 stellaris_info->iosc_desc = " (±50%)";
587 }
588 break;
589 case 1:
590 switch ((did0 >> 16) & 0xff) {
591 case 1: /* Fury */
592 break;
593 case 4: /* Tempest */
594 stellaris_info->iosc_freq = 16000000; /* +/- 1% */
595 stellaris_info->iosc_desc = " (±1%)";
596 /* FALL THROUGH */
597 case 3: /* DustDevil */
598 stellaris_info->xtal_mask = 0x1f;
599 break;
600 default:
601 LOG_WARNING("Unknown did0 class");
602 }
603 default:
604 break;
605 LOG_WARNING("Unknown did0 version");
606 }
607
608 for (i = 0; StellarisParts[i].partno; i++)
609 {
610 if (StellarisParts[i].partno == ((did1 >> 16) & 0xFF))
611 break;
612 }
613
614 stellaris_info->target_name = StellarisParts[i].partname;
615
616 stellaris_info->did0 = did0;
617 stellaris_info->did1 = did1;
618
619 stellaris_info->num_lockbits = 1 + (stellaris_info->dc0 & 0xFFFF);
620 stellaris_info->num_pages = 2 *(1 + (stellaris_info->dc0 & 0xFFFF));
621 stellaris_info->pagesize = 1024;
622 bank->size = 1024 * stellaris_info->num_pages;
623 stellaris_info->pages_in_lockregion = 2;
624 target_read_u32(target, SCB_BASE | FMPPE, &stellaris_info->lockbits);
625
626 /* provide this for the benefit of the higher flash driver layers */
627 bank->num_sectors = stellaris_info->num_pages;
628 bank->sectors = malloc(sizeof(flash_sector_t) * bank->num_sectors);
629 for (i = 0; i < bank->num_sectors; i++)
630 {
631 bank->sectors[i].offset = i * stellaris_info->pagesize;
632 bank->sectors[i].size = stellaris_info->pagesize;
633 bank->sectors[i].is_erased = -1;
634 bank->sectors[i].is_protected = -1;
635 }
636
637 /* Read main and master clock freqency register */
638 stellaris_read_clock_info(bank);
639
640 status = stellaris_get_flash_status(bank);
641
642 return ERROR_OK;
643 }
644
645 /***************************************************************************
646 * flash operations *
647 ***************************************************************************/
648
649 static int stellaris_protect_check(struct flash_bank_s *bank)
650 {
651 uint32_t status;
652
653 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
654
655 if (bank->target->state != TARGET_HALTED)
656 {
657 LOG_ERROR("Target not halted");
658 return ERROR_TARGET_NOT_HALTED;
659 }
660
661 if (stellaris_info->did1 == 0)
662 {
663 stellaris_read_part_info(bank);
664 }
665
666 if (stellaris_info->did1 == 0)
667 {
668 LOG_WARNING("Cannot identify target as Stellaris");
669 return ERROR_FLASH_OPERATION_FAILED;
670 }
671
672 status = stellaris_get_flash_status(bank);
673 stellaris_info->lockbits = status >> 16;
674
675 return ERROR_OK;
676 }
677
678 static int stellaris_erase(struct flash_bank_s *bank, int first, int last)
679 {
680 int banknr;
681 uint32_t flash_fmc, flash_cris;
682 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
683 target_t *target = bank->target;
684
685 if (bank->target->state != TARGET_HALTED)
686 {
687 LOG_ERROR("Target not halted");
688 return ERROR_TARGET_NOT_HALTED;
689 }
690
691 if (stellaris_info->did1 == 0)
692 {
693 stellaris_read_part_info(bank);
694 }
695
696 if (stellaris_info->did1 == 0)
697 {
698 LOG_WARNING("Cannot identify target as Stellaris");
699 return ERROR_FLASH_OPERATION_FAILED;
700 }
701
702 if ((first < 0) || (last < first) || (last >= (int)stellaris_info->num_pages))
703 {
704 return ERROR_FLASH_SECTOR_INVALID;
705 }
706
707 if ((first == 0) && (last == ((int)stellaris_info->num_pages-1)))
708 {
709 return stellaris_mass_erase(bank);
710 }
711
712 /* Configure the flash controller timing */
713 stellaris_read_clock_info(bank);
714 stellaris_set_flash_mode(bank,0);
715
716 /* Clear and disable flash programming interrupts */
717 target_write_u32(target, FLASH_CIM, 0);
718 target_write_u32(target, FLASH_MISC, PMISC | AMISC);
719
720 for (banknr = first; banknr <= last; banknr++)
721 {
722 /* Address is first word in page */
723 target_write_u32(target, FLASH_FMA, banknr * stellaris_info->pagesize);
724 /* Write erase command */
725 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_ERASE);
726 /* Wait until erase complete */
727 do
728 {
729 target_read_u32(target, FLASH_FMC, &flash_fmc);
730 }
731 while (flash_fmc & FMC_ERASE);
732
733 /* Check acess violations */
734 target_read_u32(target, FLASH_CRIS, &flash_cris);
735 if (flash_cris & (AMASK))
736 {
737 LOG_WARNING("Error erasing flash page %i, flash_cris 0x%" PRIx32 "", banknr, flash_cris);
738 target_write_u32(target, FLASH_CRIS, 0);
739 return ERROR_FLASH_OPERATION_FAILED;
740 }
741
742 bank->sectors[banknr].is_erased = 1;
743 }
744
745 return ERROR_OK;
746 }
747
748 static int stellaris_protect(struct flash_bank_s *bank, int set, int first, int last)
749 {
750 uint32_t fmppe, flash_fmc, flash_cris;
751 int lockregion;
752
753 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
754 target_t *target = bank->target;
755
756 if (bank->target->state != TARGET_HALTED)
757 {
758 LOG_ERROR("Target not halted");
759 return ERROR_TARGET_NOT_HALTED;
760 }
761
762 if ((first < 0) || (last < first) || (last >= stellaris_info->num_lockbits))
763 {
764 return ERROR_FLASH_SECTOR_INVALID;
765 }
766
767 if (stellaris_info->did1 == 0)
768 {
769 stellaris_read_part_info(bank);
770 }
771
772 if (stellaris_info->did1 == 0)
773 {
774 LOG_WARNING("Cannot identify target as an Stellaris MCU");
775 return ERROR_FLASH_OPERATION_FAILED;
776 }
777
778 /* Configure the flash controller timing */
779 stellaris_read_clock_info(bank);
780 stellaris_set_flash_mode(bank, 0);
781
782 fmppe = stellaris_info->lockbits;
783 for (lockregion = first; lockregion <= last; lockregion++)
784 {
785 if (set)
786 fmppe &= ~(1 << lockregion);
787 else
788 fmppe |= (1 << lockregion);
789 }
790
791 /* Clear and disable flash programming interrupts */
792 target_write_u32(target, FLASH_CIM, 0);
793 target_write_u32(target, FLASH_MISC, PMISC | AMISC);
794
795 LOG_DEBUG("fmppe 0x%" PRIx32 "",fmppe);
796 target_write_u32(target, SCB_BASE | FMPPE, fmppe);
797 /* Commit FMPPE */
798 target_write_u32(target, FLASH_FMA, 1);
799 /* Write commit command */
800 /* TODO safety check, sice this cannot be undone */
801 LOG_WARNING("Flash protection cannot be removed once commited, commit is NOT executed !");
802 /* target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT); */
803 /* Wait until erase complete */
804 do
805 {
806 target_read_u32(target, FLASH_FMC, &flash_fmc);
807 }
808 while (flash_fmc & FMC_COMT);
809
810 /* Check acess violations */
811 target_read_u32(target, FLASH_CRIS, &flash_cris);
812 if (flash_cris & (AMASK))
813 {
814 LOG_WARNING("Error setting flash page protection, flash_cris 0x%" PRIx32 "", flash_cris);
815 target_write_u32(target, FLASH_CRIS, 0);
816 return ERROR_FLASH_OPERATION_FAILED;
817 }
818
819 target_read_u32(target, SCB_BASE | FMPPE, &stellaris_info->lockbits);
820
821 return ERROR_OK;
822 }
823
824 static uint8_t stellaris_write_code[] =
825 {
826 /*
827 Call with :
828 r0 = buffer address
829 r1 = destination address
830 r2 = bytecount (in) - endaddr (work)
831
832 Used registers:
833 r3 = pFLASH_CTRL_BASE
834 r4 = FLASHWRITECMD
835 r5 = #1
836 r6 = bytes written
837 r7 = temp reg
838 */
839 0x07,0x4B, /* ldr r3,pFLASH_CTRL_BASE */
840 0x08,0x4C, /* ldr r4,FLASHWRITECMD */
841 0x01,0x25, /* movs r5, 1 */
842 0x00,0x26, /* movs r6, #0 */
843 /* mainloop: */
844 0x19,0x60, /* str r1, [r3, #0] */
845 0x87,0x59, /* ldr r7, [r0, r6] */
846 0x5F,0x60, /* str r7, [r3, #4] */
847 0x9C,0x60, /* str r4, [r3, #8] */
848 /* waitloop: */
849 0x9F,0x68, /* ldr r7, [r3, #8] */
850 0x2F,0x42, /* tst r7, r5 */
851 0xFC,0xD1, /* bne waitloop */
852 0x04,0x31, /* adds r1, r1, #4 */
853 0x04,0x36, /* adds r6, r6, #4 */
854 0x96,0x42, /* cmp r6, r2 */
855 0xF4,0xD1, /* bne mainloop */
856 /* exit: */
857 0xFE,0xE7, /* b exit */
858 /* pFLASH_CTRL_BASE: */
859 0x00,0xD0,0x0F,0x40, /* .word 0x400FD000 */
860 /* FLASHWRITECMD: */
861 0x01,0x00,0x42,0xA4 /* .word 0xA4420001 */
862 };
863
864 static int stellaris_write_block(struct flash_bank_s *bank, uint8_t *buffer, uint32_t offset, uint32_t wcount)
865 {
866 target_t *target = bank->target;
867 uint32_t buffer_size = 8192;
868 working_area_t *source;
869 working_area_t *write_algorithm;
870 uint32_t address = bank->base + offset;
871 reg_param_t reg_params[3];
872 armv7m_algorithm_t armv7m_info;
873 int retval = ERROR_OK;
874
875 LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " wcount=%08" PRIx32 "",
876 bank, buffer, offset, wcount);
877
878 /* flash write code */
879 if (target_alloc_working_area(target, sizeof(stellaris_write_code), &write_algorithm) != ERROR_OK)
880 {
881 LOG_WARNING("no working area available, can't do block memory writes");
882 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
883 };
884
885 target_write_buffer(target, write_algorithm->address, sizeof(stellaris_write_code), stellaris_write_code);
886
887 /* memory buffer */
888 while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK)
889 {
890 LOG_DEBUG("called target_alloc_working_area(target=%p buffer_size=%08" PRIx32 " source=%p)",
891 target, buffer_size, source);
892 buffer_size /= 2;
893 if (buffer_size <= 256)
894 {
895 /* if we already allocated the writing code, but failed to get a buffer, free the algorithm */
896 if (write_algorithm)
897 target_free_working_area(target, write_algorithm);
898
899 LOG_WARNING("no large enough working area available, can't do block memory writes");
900 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
901 }
902 };
903
904 armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
905 armv7m_info.core_mode = ARMV7M_MODE_ANY;
906
907 init_reg_param(&reg_params[0], "r0", 32, PARAM_OUT);
908 init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
909 init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
910
911 while (wcount > 0)
912 {
913 uint32_t thisrun_count = (wcount > (buffer_size / 4)) ? (buffer_size / 4) : wcount;
914
915 target_write_buffer(target, source->address, thisrun_count * 4, buffer);
916
917 buf_set_u32(reg_params[0].value, 0, 32, source->address);
918 buf_set_u32(reg_params[1].value, 0, 32, address);
919 buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count);
920 LOG_INFO("Algorithm flash write %" PRIi32 " words to 0x%" PRIx32 ", %" PRIi32 " remaining", thisrun_count, address, (wcount - thisrun_count));
921 LOG_DEBUG("Algorithm flash write %" PRIi32 " words to 0x%" PRIx32 ", %" PRIi32 " remaining", thisrun_count, address, (wcount - thisrun_count));
922 if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params, write_algorithm->address, write_algorithm->address + sizeof(stellaris_write_code)-10, 10000, &armv7m_info)) != ERROR_OK)
923 {
924 LOG_ERROR("error executing stellaris flash write algorithm");
925 retval = ERROR_FLASH_OPERATION_FAILED;
926 break;
927 }
928
929 buffer += thisrun_count * 4;
930 address += thisrun_count * 4;
931 wcount -= thisrun_count;
932 }
933
934 target_free_working_area(target, write_algorithm);
935 target_free_working_area(target, source);
936
937 destroy_reg_param(&reg_params[0]);
938 destroy_reg_param(&reg_params[1]);
939 destroy_reg_param(&reg_params[2]);
940
941 return retval;
942 }
943
944 static int stellaris_write(struct flash_bank_s *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
945 {
946 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
947 target_t *target = bank->target;
948 uint32_t address = offset;
949 uint32_t flash_cris, flash_fmc;
950 uint32_t words_remaining = (count / 4);
951 uint32_t bytes_remaining = (count & 0x00000003);
952 uint32_t bytes_written = 0;
953 int retval;
954
955 if (bank->target->state != TARGET_HALTED)
956 {
957 LOG_ERROR("Target not halted");
958 return ERROR_TARGET_NOT_HALTED;
959 }
960
961 LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " count=%08" PRIx32 "",
962 bank, buffer, offset, count);
963
964 if (stellaris_info->did1 == 0)
965 {
966 stellaris_read_part_info(bank);
967 }
968
969 if (stellaris_info->did1 == 0)
970 {
971 LOG_WARNING("Cannot identify target as a Stellaris processor");
972 return ERROR_FLASH_OPERATION_FAILED;
973 }
974
975 if (offset & 0x3)
976 {
977 LOG_WARNING("offset size must be word aligned");
978 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
979 }
980
981 if (offset + count > bank->size)
982 return ERROR_FLASH_DST_OUT_OF_BANK;
983
984 /* Configure the flash controller timing */
985 stellaris_read_clock_info(bank);
986 stellaris_set_flash_mode(bank, 0);
987
988 /* Clear and disable flash programming interrupts */
989 target_write_u32(target, FLASH_CIM, 0);
990 target_write_u32(target, FLASH_MISC, PMISC | AMISC);
991
992 /* multiple words to be programmed? */
993 if (words_remaining > 0)
994 {
995 /* try using a block write */
996 if ((retval = stellaris_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK)
997 {
998 if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
999 {
1000 /* if block write failed (no sufficient working area),
1001 * we use normal (slow) single dword accesses */
1002 LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
1003 }
1004 else if (retval == ERROR_FLASH_OPERATION_FAILED)
1005 {
1006 /* if an error occured, we examine the reason, and quit */
1007 target_read_u32(target, FLASH_CRIS, &flash_cris);
1008
1009 LOG_ERROR("flash writing failed with CRIS: 0x%" PRIx32 "", flash_cris);
1010 return ERROR_FLASH_OPERATION_FAILED;
1011 }
1012 }
1013 else
1014 {
1015 buffer += words_remaining * 4;
1016 address += words_remaining * 4;
1017 words_remaining = 0;
1018 }
1019 }
1020
1021 while (words_remaining > 0)
1022 {
1023 if (!(address & 0xff))
1024 LOG_DEBUG("0x%" PRIx32 "", address);
1025
1026 /* Program one word */
1027 target_write_u32(target, FLASH_FMA, address);
1028 target_write_buffer(target, FLASH_FMD, 4, buffer);
1029 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1030 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1031 /* Wait until write complete */
1032 do
1033 {
1034 target_read_u32(target, FLASH_FMC, &flash_fmc);
1035 } while (flash_fmc & FMC_WRITE);
1036
1037 buffer += 4;
1038 address += 4;
1039 words_remaining--;
1040 }
1041
1042 if (bytes_remaining)
1043 {
1044 uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
1045 int i = 0;
1046
1047 while (bytes_remaining > 0)
1048 {
1049 last_word[i++] = *(buffer + bytes_written);
1050 bytes_remaining--;
1051 bytes_written++;
1052 }
1053
1054 if (!(address & 0xff))
1055 LOG_DEBUG("0x%" PRIx32 "", address);
1056
1057 /* Program one word */
1058 target_write_u32(target, FLASH_FMA, address);
1059 target_write_buffer(target, FLASH_FMD, 4, last_word);
1060 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_WRITE);
1061 /* LOG_DEBUG("0x%x 0x%x 0x%x",address,buf_get_u32(buffer, 0, 32),FMC_WRKEY | FMC_WRITE); */
1062 /* Wait until write complete */
1063 do
1064 {
1065 target_read_u32(target, FLASH_FMC, &flash_fmc);
1066 } while (flash_fmc & FMC_WRITE);
1067 }
1068
1069 /* Check access violations */
1070 target_read_u32(target, FLASH_CRIS, &flash_cris);
1071 if (flash_cris & (AMASK))
1072 {
1073 LOG_DEBUG("flash_cris 0x%" PRIx32 "", flash_cris);
1074 return ERROR_FLASH_OPERATION_FAILED;
1075 }
1076 return ERROR_OK;
1077 }
1078
1079 static int stellaris_probe(struct flash_bank_s *bank)
1080 {
1081 /* we can't probe on an stellaris
1082 * if this is an stellaris, it has the configured flash
1083 */
1084
1085 if (bank->target->state != TARGET_HALTED)
1086 {
1087 LOG_ERROR("Target not halted");
1088 return ERROR_TARGET_NOT_HALTED;
1089 }
1090
1091 /* stellaris_read_part_info() already takes care about error checking and reporting */
1092 return stellaris_read_part_info(bank);
1093 }
1094
1095 static int stellaris_auto_probe(struct flash_bank_s *bank)
1096 {
1097 stellaris_flash_bank_t *stellaris_info = bank->driver_priv;
1098 if (stellaris_info->did1)
1099 return ERROR_OK;
1100 return stellaris_probe(bank);
1101 }
1102
1103 static int stellaris_mass_erase(struct flash_bank_s *bank)
1104 {
1105 target_t *target = NULL;
1106 stellaris_flash_bank_t *stellaris_info = NULL;
1107 uint32_t flash_fmc;
1108
1109 stellaris_info = bank->driver_priv;
1110 target = bank->target;
1111
1112 if (target->state != TARGET_HALTED)
1113 {
1114 LOG_ERROR("Target not halted");
1115 return ERROR_TARGET_NOT_HALTED;
1116 }
1117
1118 if (stellaris_info->did1 == 0)
1119 {
1120 stellaris_read_part_info(bank);
1121 }
1122
1123 if (stellaris_info->did1 == 0)
1124 {
1125 LOG_WARNING("Cannot identify target as Stellaris");
1126 return ERROR_FLASH_OPERATION_FAILED;
1127 }
1128
1129 /* Configure the flash controller timing */
1130 stellaris_read_clock_info(bank);
1131 stellaris_set_flash_mode(bank, 0);
1132
1133 /* Clear and disable flash programming interrupts */
1134 target_write_u32(target, FLASH_CIM, 0);
1135 target_write_u32(target, FLASH_MISC, PMISC | AMISC);
1136
1137 target_write_u32(target, FLASH_FMA, 0);
1138 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1139 /* Wait until erase complete */
1140 do
1141 {
1142 target_read_u32(target, FLASH_FMC, &flash_fmc);
1143 }
1144 while (flash_fmc & FMC_MERASE);
1145
1146 /* if device has > 128k, then second erase cycle is needed
1147 * this is only valid for older devices, but will not hurt */
1148 if (stellaris_info->num_pages * stellaris_info->pagesize > 0x20000)
1149 {
1150 target_write_u32(target, FLASH_FMA, 0x20000);
1151 target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_MERASE);
1152 /* Wait until erase complete */
1153 do
1154 {
1155 target_read_u32(target, FLASH_FMC, &flash_fmc);
1156 }
1157 while (flash_fmc & FMC_MERASE);
1158 }
1159
1160 return ERROR_OK;
1161 }
1162
1163 static int stellaris_handle_mass_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1164 {
1165 flash_bank_t *bank;
1166 int i;
1167
1168 if (argc < 1)
1169 {
1170 command_print(cmd_ctx, "stellaris mass_erase <bank>");
1171 return ERROR_OK;
1172 }
1173
1174 bank = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
1175 if (!bank)
1176 {
1177 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
1178 return ERROR_OK;
1179 }
1180
1181 if (stellaris_mass_erase(bank) == ERROR_OK)
1182 {
1183 /* set all sectors as erased */
1184 for (i = 0; i < bank->num_sectors; i++)
1185 {
1186 bank->sectors[i].is_erased = 1;
1187 }
1188
1189 command_print(cmd_ctx, "stellaris mass erase complete");
1190 }
1191 else
1192 {
1193 command_print(cmd_ctx, "stellaris mass erase failed");
1194 }
1195
1196 return ERROR_OK;
1197 }
Generic flash access through boundary scans