]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * CFI parallel flash with AMD command set emulation | |
3 | * | |
4 | * Copyright (c) 2005 Jocelyn Mayer | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | /* | |
21 | * For now, this code can emulate flashes of 1, 2 or 4 bytes width. | |
22 | * Supported commands/modes are: | |
23 | * - flash read | |
24 | * - flash write | |
25 | * - flash ID read | |
26 | * - sector erase | |
27 | * - chip erase | |
28 | * - unlock bypass command | |
29 | * - CFI queries | |
30 | * | |
31 | * It does not support flash interleaving. | |
32 | * It does not implement boot blocs with reduced size | |
33 | * It does not implement software data protection as found in many real chips | |
34 | * It does not implement erase suspend/resume commands | |
35 | * It does not implement multiple sectors erase | |
36 | */ | |
37 | ||
38 | #include "hw.h" | |
39 | #include "flash.h" | |
40 | #include "qemu-timer.h" | |
41 | #include "block.h" | |
42 | ||
43 | //#define PFLASH_DEBUG | |
44 | #ifdef PFLASH_DEBUG | |
45 | #define DPRINTF(fmt, ...) \ | |
46 | do { \ | |
47 | printf("PFLASH: " fmt , ## __VA_ARGS__); \ | |
48 | } while (0) | |
49 | #else | |
50 | #define DPRINTF(fmt, ...) do { } while (0) | |
51 | #endif | |
52 | ||
53 | #define PFLASH_LAZY_ROMD_THRESHOLD 42 | |
54 | ||
55 | struct pflash_t { | |
56 | BlockDriverState *bs; | |
57 | target_phys_addr_t base; | |
58 | uint32_t sector_len; | |
59 | uint32_t chip_len; | |
60 | int mappings; | |
61 | int width; | |
62 | int wcycle; /* if 0, the flash is read normally */ | |
63 | int bypass; | |
64 | int ro; | |
65 | uint8_t cmd; | |
66 | uint8_t status; | |
67 | uint16_t ident[4]; | |
68 | uint16_t unlock_addr[2]; | |
69 | uint8_t cfi_len; | |
70 | uint8_t cfi_table[0x52]; | |
71 | QEMUTimer *timer; | |
72 | ram_addr_t off; | |
73 | int fl_mem; | |
74 | int rom_mode; | |
75 | int read_counter; /* used for lazy switch-back to rom mode */ | |
76 | void *storage; | |
77 | }; | |
78 | ||
79 | static void pflash_register_memory(pflash_t *pfl, int rom_mode) | |
80 | { | |
81 | unsigned long phys_offset = pfl->fl_mem; | |
82 | int i; | |
83 | ||
84 | if (rom_mode) | |
85 | phys_offset |= pfl->off | IO_MEM_ROMD; | |
86 | pfl->rom_mode = rom_mode; | |
87 | ||
88 | for (i = 0; i < pfl->mappings; i++) | |
89 | cpu_register_physical_memory(pfl->base + i * pfl->chip_len, | |
90 | pfl->chip_len, phys_offset); | |
91 | } | |
92 | ||
93 | static void pflash_timer (void *opaque) | |
94 | { | |
95 | pflash_t *pfl = opaque; | |
96 | ||
97 | DPRINTF("%s: command %02x done\n", __func__, pfl->cmd); | |
98 | /* Reset flash */ | |
99 | pfl->status ^= 0x80; | |
100 | if (pfl->bypass) { | |
101 | pfl->wcycle = 2; | |
102 | } else { | |
103 | pflash_register_memory(pfl, 1); | |
104 | pfl->wcycle = 0; | |
105 | } | |
106 | pfl->cmd = 0; | |
107 | } | |
108 | ||
109 | static uint32_t pflash_read (pflash_t *pfl, target_phys_addr_t offset, | |
110 | int width, int be) | |
111 | { | |
112 | target_phys_addr_t boff; | |
113 | uint32_t ret; | |
114 | uint8_t *p; | |
115 | ||
116 | DPRINTF("%s: offset " TARGET_FMT_plx "\n", __func__, offset); | |
117 | ret = -1; | |
118 | /* Lazy reset to ROMD mode after a certain amount of read accesses */ | |
119 | if (!pfl->rom_mode && pfl->wcycle == 0 && | |
120 | ++pfl->read_counter > PFLASH_LAZY_ROMD_THRESHOLD) { | |
121 | pflash_register_memory(pfl, 1); | |
122 | } | |
123 | offset &= pfl->chip_len - 1; | |
124 | boff = offset & 0xFF; | |
125 | if (pfl->width == 2) | |
126 | boff = boff >> 1; | |
127 | else if (pfl->width == 4) | |
128 | boff = boff >> 2; | |
129 | switch (pfl->cmd) { | |
130 | default: | |
131 | /* This should never happen : reset state & treat it as a read*/ | |
132 | DPRINTF("%s: unknown command state: %x\n", __func__, pfl->cmd); | |
133 | pfl->wcycle = 0; | |
134 | pfl->cmd = 0; | |
135 | case 0x80: | |
136 | /* We accept reads during second unlock sequence... */ | |
137 | case 0x00: | |
138 | flash_read: | |
139 | /* Flash area read */ | |
140 | p = pfl->storage; | |
141 | switch (width) { | |
142 | case 1: | |
143 | ret = p[offset]; | |
144 | // DPRINTF("%s: data offset %08x %02x\n", __func__, offset, ret); | |
145 | break; | |
146 | case 2: | |
147 | if (be) { | |
148 | ret = p[offset] << 8; | |
149 | ret |= p[offset + 1]; | |
150 | } else { | |
151 | ret = p[offset]; | |
152 | ret |= p[offset + 1] << 8; | |
153 | } | |
154 | // DPRINTF("%s: data offset %08x %04x\n", __func__, offset, ret); | |
155 | break; | |
156 | case 4: | |
157 | if (be) { | |
158 | ret = p[offset] << 24; | |
159 | ret |= p[offset + 1] << 16; | |
160 | ret |= p[offset + 2] << 8; | |
161 | ret |= p[offset + 3]; | |
162 | } else { | |
163 | ret = p[offset]; | |
164 | ret |= p[offset + 1] << 8; | |
165 | ret |= p[offset + 2] << 16; | |
166 | ret |= p[offset + 3] << 24; | |
167 | } | |
168 | // DPRINTF("%s: data offset %08x %08x\n", __func__, offset, ret); | |
169 | break; | |
170 | } | |
171 | break; | |
172 | case 0x90: | |
173 | /* flash ID read */ | |
174 | switch (boff) { | |
175 | case 0x00: | |
176 | case 0x01: | |
177 | ret = pfl->ident[boff & 0x01]; | |
178 | break; | |
179 | case 0x02: | |
180 | ret = 0x00; /* Pretend all sectors are unprotected */ | |
181 | break; | |
182 | case 0x0E: | |
183 | case 0x0F: | |
184 | if (pfl->ident[2 + (boff & 0x01)] == (uint8_t)-1) | |
185 | goto flash_read; | |
186 | ret = pfl->ident[2 + (boff & 0x01)]; | |
187 | break; | |
188 | default: | |
189 | goto flash_read; | |
190 | } | |
191 | DPRINTF("%s: ID " TARGET_FMT_plx " %x\n", __func__, boff, ret); | |
192 | break; | |
193 | case 0xA0: | |
194 | case 0x10: | |
195 | case 0x30: | |
196 | /* Status register read */ | |
197 | ret = pfl->status; | |
198 | DPRINTF("%s: status %x\n", __func__, ret); | |
199 | /* Toggle bit 6 */ | |
200 | pfl->status ^= 0x40; | |
201 | break; | |
202 | case 0x98: | |
203 | /* CFI query mode */ | |
204 | if (boff > pfl->cfi_len) | |
205 | ret = 0; | |
206 | else | |
207 | ret = pfl->cfi_table[boff]; | |
208 | break; | |
209 | } | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | /* update flash content on disk */ | |
215 | static void pflash_update(pflash_t *pfl, int offset, | |
216 | int size) | |
217 | { | |
218 | int offset_end; | |
219 | if (pfl->bs) { | |
220 | offset_end = offset + size; | |
221 | /* round to sectors */ | |
222 | offset = offset >> 9; | |
223 | offset_end = (offset_end + 511) >> 9; | |
224 | bdrv_write(pfl->bs, offset, pfl->storage + (offset << 9), | |
225 | offset_end - offset); | |
226 | } | |
227 | } | |
228 | ||
229 | static void pflash_write (pflash_t *pfl, target_phys_addr_t offset, | |
230 | uint32_t value, int width, int be) | |
231 | { | |
232 | target_phys_addr_t boff; | |
233 | uint8_t *p; | |
234 | uint8_t cmd; | |
235 | ||
236 | cmd = value; | |
237 | if (pfl->cmd != 0xA0 && cmd == 0xF0) { | |
238 | #if 0 | |
239 | DPRINTF("%s: flash reset asked (%02x %02x)\n", | |
240 | __func__, pfl->cmd, cmd); | |
241 | #endif | |
242 | goto reset_flash; | |
243 | } | |
244 | DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d %d\n", __func__, | |
245 | offset, value, width, pfl->wcycle); | |
246 | offset &= pfl->chip_len - 1; | |
247 | ||
248 | DPRINTF("%s: offset " TARGET_FMT_plx " %08x %d\n", __func__, | |
249 | offset, value, width); | |
250 | boff = offset & (pfl->sector_len - 1); | |
251 | if (pfl->width == 2) | |
252 | boff = boff >> 1; | |
253 | else if (pfl->width == 4) | |
254 | boff = boff >> 2; | |
255 | switch (pfl->wcycle) { | |
256 | case 0: | |
257 | /* Set the device in I/O access mode if required */ | |
258 | if (pfl->rom_mode) | |
259 | pflash_register_memory(pfl, 0); | |
260 | pfl->read_counter = 0; | |
261 | /* We're in read mode */ | |
262 | check_unlock0: | |
263 | if (boff == 0x55 && cmd == 0x98) { | |
264 | enter_CFI_mode: | |
265 | /* Enter CFI query mode */ | |
266 | pfl->wcycle = 7; | |
267 | pfl->cmd = 0x98; | |
268 | return; | |
269 | } | |
270 | if (boff != pfl->unlock_addr[0] || cmd != 0xAA) { | |
271 | DPRINTF("%s: unlock0 failed " TARGET_FMT_plx " %02x %04x\n", | |
272 | __func__, boff, cmd, pfl->unlock_addr[0]); | |
273 | goto reset_flash; | |
274 | } | |
275 | DPRINTF("%s: unlock sequence started\n", __func__); | |
276 | break; | |
277 | case 1: | |
278 | /* We started an unlock sequence */ | |
279 | check_unlock1: | |
280 | if (boff != pfl->unlock_addr[1] || cmd != 0x55) { | |
281 | DPRINTF("%s: unlock1 failed " TARGET_FMT_plx " %02x\n", __func__, | |
282 | boff, cmd); | |
283 | goto reset_flash; | |
284 | } | |
285 | DPRINTF("%s: unlock sequence done\n", __func__); | |
286 | break; | |
287 | case 2: | |
288 | /* We finished an unlock sequence */ | |
289 | if (!pfl->bypass && boff != pfl->unlock_addr[0]) { | |
290 | DPRINTF("%s: command failed " TARGET_FMT_plx " %02x\n", __func__, | |
291 | boff, cmd); | |
292 | goto reset_flash; | |
293 | } | |
294 | switch (cmd) { | |
295 | case 0x20: | |
296 | pfl->bypass = 1; | |
297 | goto do_bypass; | |
298 | case 0x80: | |
299 | case 0x90: | |
300 | case 0xA0: | |
301 | pfl->cmd = cmd; | |
302 | DPRINTF("%s: starting command %02x\n", __func__, cmd); | |
303 | break; | |
304 | default: | |
305 | DPRINTF("%s: unknown command %02x\n", __func__, cmd); | |
306 | goto reset_flash; | |
307 | } | |
308 | break; | |
309 | case 3: | |
310 | switch (pfl->cmd) { | |
311 | case 0x80: | |
312 | /* We need another unlock sequence */ | |
313 | goto check_unlock0; | |
314 | case 0xA0: | |
315 | DPRINTF("%s: write data offset " TARGET_FMT_plx " %08x %d\n", | |
316 | __func__, offset, value, width); | |
317 | p = pfl->storage; | |
318 | switch (width) { | |
319 | case 1: | |
320 | p[offset] &= value; | |
321 | pflash_update(pfl, offset, 1); | |
322 | break; | |
323 | case 2: | |
324 | if (be) { | |
325 | p[offset] &= value >> 8; | |
326 | p[offset + 1] &= value; | |
327 | } else { | |
328 | p[offset] &= value; | |
329 | p[offset + 1] &= value >> 8; | |
330 | } | |
331 | pflash_update(pfl, offset, 2); | |
332 | break; | |
333 | case 4: | |
334 | if (be) { | |
335 | p[offset] &= value >> 24; | |
336 | p[offset + 1] &= value >> 16; | |
337 | p[offset + 2] &= value >> 8; | |
338 | p[offset + 3] &= value; | |
339 | } else { | |
340 | p[offset] &= value; | |
341 | p[offset + 1] &= value >> 8; | |
342 | p[offset + 2] &= value >> 16; | |
343 | p[offset + 3] &= value >> 24; | |
344 | } | |
345 | pflash_update(pfl, offset, 4); | |
346 | break; | |
347 | } | |
348 | pfl->status = 0x00 | ~(value & 0x80); | |
349 | /* Let's pretend write is immediate */ | |
350 | if (pfl->bypass) | |
351 | goto do_bypass; | |
352 | goto reset_flash; | |
353 | case 0x90: | |
354 | if (pfl->bypass && cmd == 0x00) { | |
355 | /* Unlock bypass reset */ | |
356 | goto reset_flash; | |
357 | } | |
358 | /* We can enter CFI query mode from autoselect mode */ | |
359 | if (boff == 0x55 && cmd == 0x98) | |
360 | goto enter_CFI_mode; | |
361 | /* No break here */ | |
362 | default: | |
363 | DPRINTF("%s: invalid write for command %02x\n", | |
364 | __func__, pfl->cmd); | |
365 | goto reset_flash; | |
366 | } | |
367 | case 4: | |
368 | switch (pfl->cmd) { | |
369 | case 0xA0: | |
370 | /* Ignore writes while flash data write is occurring */ | |
371 | /* As we suppose write is immediate, this should never happen */ | |
372 | return; | |
373 | case 0x80: | |
374 | goto check_unlock1; | |
375 | default: | |
376 | /* Should never happen */ | |
377 | DPRINTF("%s: invalid command state %02x (wc 4)\n", | |
378 | __func__, pfl->cmd); | |
379 | goto reset_flash; | |
380 | } | |
381 | break; | |
382 | case 5: | |
383 | switch (cmd) { | |
384 | case 0x10: | |
385 | if (boff != pfl->unlock_addr[0]) { | |
386 | DPRINTF("%s: chip erase: invalid address " TARGET_FMT_plx "\n", | |
387 | __func__, offset); | |
388 | goto reset_flash; | |
389 | } | |
390 | /* Chip erase */ | |
391 | DPRINTF("%s: start chip erase\n", __func__); | |
392 | memset(pfl->storage, 0xFF, pfl->chip_len); | |
393 | pfl->status = 0x00; | |
394 | pflash_update(pfl, 0, pfl->chip_len); | |
395 | /* Let's wait 5 seconds before chip erase is done */ | |
396 | qemu_mod_timer(pfl->timer, | |
397 | qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() * 5)); | |
398 | break; | |
399 | case 0x30: | |
400 | /* Sector erase */ | |
401 | p = pfl->storage; | |
402 | offset &= ~(pfl->sector_len - 1); | |
403 | DPRINTF("%s: start sector erase at " TARGET_FMT_plx "\n", __func__, | |
404 | offset); | |
405 | memset(p + offset, 0xFF, pfl->sector_len); | |
406 | pflash_update(pfl, offset, pfl->sector_len); | |
407 | pfl->status = 0x00; | |
408 | /* Let's wait 1/2 second before sector erase is done */ | |
409 | qemu_mod_timer(pfl->timer, | |
410 | qemu_get_clock_ns(vm_clock) + (get_ticks_per_sec() / 2)); | |
411 | break; | |
412 | default: | |
413 | DPRINTF("%s: invalid command %02x (wc 5)\n", __func__, cmd); | |
414 | goto reset_flash; | |
415 | } | |
416 | pfl->cmd = cmd; | |
417 | break; | |
418 | case 6: | |
419 | switch (pfl->cmd) { | |
420 | case 0x10: | |
421 | /* Ignore writes during chip erase */ | |
422 | return; | |
423 | case 0x30: | |
424 | /* Ignore writes during sector erase */ | |
425 | return; | |
426 | default: | |
427 | /* Should never happen */ | |
428 | DPRINTF("%s: invalid command state %02x (wc 6)\n", | |
429 | __func__, pfl->cmd); | |
430 | goto reset_flash; | |
431 | } | |
432 | break; | |
433 | case 7: /* Special value for CFI queries */ | |
434 | DPRINTF("%s: invalid write in CFI query mode\n", __func__); | |
435 | goto reset_flash; | |
436 | default: | |
437 | /* Should never happen */ | |
438 | DPRINTF("%s: invalid write state (wc 7)\n", __func__); | |
439 | goto reset_flash; | |
440 | } | |
441 | pfl->wcycle++; | |
442 | ||
443 | return; | |
444 | ||
445 | /* Reset flash */ | |
446 | reset_flash: | |
447 | pfl->bypass = 0; | |
448 | pfl->wcycle = 0; | |
449 | pfl->cmd = 0; | |
450 | return; | |
451 | ||
452 | do_bypass: | |
453 | pfl->wcycle = 2; | |
454 | pfl->cmd = 0; | |
455 | return; | |
456 | } | |
457 | ||
458 | ||
459 | static uint32_t pflash_readb_be(void *opaque, target_phys_addr_t addr) | |
460 | { | |
461 | return pflash_read(opaque, addr, 1, 1); | |
462 | } | |
463 | ||
464 | static uint32_t pflash_readb_le(void *opaque, target_phys_addr_t addr) | |
465 | { | |
466 | return pflash_read(opaque, addr, 1, 0); | |
467 | } | |
468 | ||
469 | static uint32_t pflash_readw_be(void *opaque, target_phys_addr_t addr) | |
470 | { | |
471 | pflash_t *pfl = opaque; | |
472 | ||
473 | return pflash_read(pfl, addr, 2, 1); | |
474 | } | |
475 | ||
476 | static uint32_t pflash_readw_le(void *opaque, target_phys_addr_t addr) | |
477 | { | |
478 | pflash_t *pfl = opaque; | |
479 | ||
480 | return pflash_read(pfl, addr, 2, 0); | |
481 | } | |
482 | ||
483 | static uint32_t pflash_readl_be(void *opaque, target_phys_addr_t addr) | |
484 | { | |
485 | pflash_t *pfl = opaque; | |
486 | ||
487 | return pflash_read(pfl, addr, 4, 1); | |
488 | } | |
489 | ||
490 | static uint32_t pflash_readl_le(void *opaque, target_phys_addr_t addr) | |
491 | { | |
492 | pflash_t *pfl = opaque; | |
493 | ||
494 | return pflash_read(pfl, addr, 4, 0); | |
495 | } | |
496 | ||
497 | static void pflash_writeb_be(void *opaque, target_phys_addr_t addr, | |
498 | uint32_t value) | |
499 | { | |
500 | pflash_write(opaque, addr, value, 1, 1); | |
501 | } | |
502 | ||
503 | static void pflash_writeb_le(void *opaque, target_phys_addr_t addr, | |
504 | uint32_t value) | |
505 | { | |
506 | pflash_write(opaque, addr, value, 1, 0); | |
507 | } | |
508 | ||
509 | static void pflash_writew_be(void *opaque, target_phys_addr_t addr, | |
510 | uint32_t value) | |
511 | { | |
512 | pflash_t *pfl = opaque; | |
513 | ||
514 | pflash_write(pfl, addr, value, 2, 1); | |
515 | } | |
516 | ||
517 | static void pflash_writew_le(void *opaque, target_phys_addr_t addr, | |
518 | uint32_t value) | |
519 | { | |
520 | pflash_t *pfl = opaque; | |
521 | ||
522 | pflash_write(pfl, addr, value, 2, 0); | |
523 | } | |
524 | ||
525 | static void pflash_writel_be(void *opaque, target_phys_addr_t addr, | |
526 | uint32_t value) | |
527 | { | |
528 | pflash_t *pfl = opaque; | |
529 | ||
530 | pflash_write(pfl, addr, value, 4, 1); | |
531 | } | |
532 | ||
533 | static void pflash_writel_le(void *opaque, target_phys_addr_t addr, | |
534 | uint32_t value) | |
535 | { | |
536 | pflash_t *pfl = opaque; | |
537 | ||
538 | pflash_write(pfl, addr, value, 4, 0); | |
539 | } | |
540 | ||
541 | static CPUWriteMemoryFunc * const pflash_write_ops_be[] = { | |
542 | &pflash_writeb_be, | |
543 | &pflash_writew_be, | |
544 | &pflash_writel_be, | |
545 | }; | |
546 | ||
547 | static CPUReadMemoryFunc * const pflash_read_ops_be[] = { | |
548 | &pflash_readb_be, | |
549 | &pflash_readw_be, | |
550 | &pflash_readl_be, | |
551 | }; | |
552 | ||
553 | static CPUWriteMemoryFunc * const pflash_write_ops_le[] = { | |
554 | &pflash_writeb_le, | |
555 | &pflash_writew_le, | |
556 | &pflash_writel_le, | |
557 | }; | |
558 | ||
559 | static CPUReadMemoryFunc * const pflash_read_ops_le[] = { | |
560 | &pflash_readb_le, | |
561 | &pflash_readw_le, | |
562 | &pflash_readl_le, | |
563 | }; | |
564 | ||
565 | /* Count trailing zeroes of a 32 bits quantity */ | |
566 | static int ctz32 (uint32_t n) | |
567 | { | |
568 | int ret; | |
569 | ||
570 | ret = 0; | |
571 | if (!(n & 0xFFFF)) { | |
572 | ret += 16; | |
573 | n = n >> 16; | |
574 | } | |
575 | if (!(n & 0xFF)) { | |
576 | ret += 8; | |
577 | n = n >> 8; | |
578 | } | |
579 | if (!(n & 0xF)) { | |
580 | ret += 4; | |
581 | n = n >> 4; | |
582 | } | |
583 | if (!(n & 0x3)) { | |
584 | ret += 2; | |
585 | n = n >> 2; | |
586 | } | |
587 | if (!(n & 0x1)) { | |
588 | ret++; | |
589 | #if 0 /* This is not necessary as n is never 0 */ | |
590 | n = n >> 1; | |
591 | #endif | |
592 | } | |
593 | #if 0 /* This is not necessary as n is never 0 */ | |
594 | if (!n) | |
595 | ret++; | |
596 | #endif | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
601 | pflash_t *pflash_cfi02_register(target_phys_addr_t base, ram_addr_t off, | |
602 | BlockDriverState *bs, uint32_t sector_len, | |
603 | int nb_blocs, int nb_mappings, int width, | |
604 | uint16_t id0, uint16_t id1, | |
605 | uint16_t id2, uint16_t id3, | |
606 | uint16_t unlock_addr0, uint16_t unlock_addr1, | |
607 | int be) | |
608 | { | |
609 | pflash_t *pfl; | |
610 | int32_t chip_len; | |
611 | int ret; | |
612 | ||
613 | chip_len = sector_len * nb_blocs; | |
614 | /* XXX: to be fixed */ | |
615 | #if 0 | |
616 | if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) && | |
617 | total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024)) | |
618 | return NULL; | |
619 | #endif | |
620 | pfl = qemu_mallocz(sizeof(pflash_t)); | |
621 | /* FIXME: Allocate ram ourselves. */ | |
622 | pfl->storage = qemu_get_ram_ptr(off); | |
623 | if (be) { | |
624 | pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_be, | |
625 | pflash_write_ops_be, | |
626 | pfl, DEVICE_NATIVE_ENDIAN); | |
627 | } else { | |
628 | pfl->fl_mem = cpu_register_io_memory(pflash_read_ops_le, | |
629 | pflash_write_ops_le, | |
630 | pfl, DEVICE_NATIVE_ENDIAN); | |
631 | } | |
632 | pfl->off = off; | |
633 | pfl->base = base; | |
634 | pfl->chip_len = chip_len; | |
635 | pfl->mappings = nb_mappings; | |
636 | pflash_register_memory(pfl, 1); | |
637 | pfl->bs = bs; | |
638 | if (pfl->bs) { | |
639 | /* read the initial flash content */ | |
640 | ret = bdrv_read(pfl->bs, 0, pfl->storage, chip_len >> 9); | |
641 | if (ret < 0) { | |
642 | cpu_unregister_io_memory(pfl->fl_mem); | |
643 | qemu_free(pfl); | |
644 | return NULL; | |
645 | } | |
646 | } | |
647 | #if 0 /* XXX: there should be a bit to set up read-only, | |
648 | * the same way the hardware does (with WP pin). | |
649 | */ | |
650 | pfl->ro = 1; | |
651 | #else | |
652 | pfl->ro = 0; | |
653 | #endif | |
654 | pfl->timer = qemu_new_timer_ns(vm_clock, pflash_timer, pfl); | |
655 | pfl->sector_len = sector_len; | |
656 | pfl->width = width; | |
657 | pfl->wcycle = 0; | |
658 | pfl->cmd = 0; | |
659 | pfl->status = 0; | |
660 | pfl->ident[0] = id0; | |
661 | pfl->ident[1] = id1; | |
662 | pfl->ident[2] = id2; | |
663 | pfl->ident[3] = id3; | |
664 | pfl->unlock_addr[0] = unlock_addr0; | |
665 | pfl->unlock_addr[1] = unlock_addr1; | |
666 | /* Hardcoded CFI table (mostly from SG29 Spansion flash) */ | |
667 | pfl->cfi_len = 0x52; | |
668 | /* Standard "QRY" string */ | |
669 | pfl->cfi_table[0x10] = 'Q'; | |
670 | pfl->cfi_table[0x11] = 'R'; | |
671 | pfl->cfi_table[0x12] = 'Y'; | |
672 | /* Command set (AMD/Fujitsu) */ | |
673 | pfl->cfi_table[0x13] = 0x02; | |
674 | pfl->cfi_table[0x14] = 0x00; | |
675 | /* Primary extended table address */ | |
676 | pfl->cfi_table[0x15] = 0x31; | |
677 | pfl->cfi_table[0x16] = 0x00; | |
678 | /* Alternate command set (none) */ | |
679 | pfl->cfi_table[0x17] = 0x00; | |
680 | pfl->cfi_table[0x18] = 0x00; | |
681 | /* Alternate extended table (none) */ | |
682 | pfl->cfi_table[0x19] = 0x00; | |
683 | pfl->cfi_table[0x1A] = 0x00; | |
684 | /* Vcc min */ | |
685 | pfl->cfi_table[0x1B] = 0x27; | |
686 | /* Vcc max */ | |
687 | pfl->cfi_table[0x1C] = 0x36; | |
688 | /* Vpp min (no Vpp pin) */ | |
689 | pfl->cfi_table[0x1D] = 0x00; | |
690 | /* Vpp max (no Vpp pin) */ | |
691 | pfl->cfi_table[0x1E] = 0x00; | |
692 | /* Reserved */ | |
693 | pfl->cfi_table[0x1F] = 0x07; | |
694 | /* Timeout for min size buffer write (NA) */ | |
695 | pfl->cfi_table[0x20] = 0x00; | |
696 | /* Typical timeout for block erase (512 ms) */ | |
697 | pfl->cfi_table[0x21] = 0x09; | |
698 | /* Typical timeout for full chip erase (4096 ms) */ | |
699 | pfl->cfi_table[0x22] = 0x0C; | |
700 | /* Reserved */ | |
701 | pfl->cfi_table[0x23] = 0x01; | |
702 | /* Max timeout for buffer write (NA) */ | |
703 | pfl->cfi_table[0x24] = 0x00; | |
704 | /* Max timeout for block erase */ | |
705 | pfl->cfi_table[0x25] = 0x0A; | |
706 | /* Max timeout for chip erase */ | |
707 | pfl->cfi_table[0x26] = 0x0D; | |
708 | /* Device size */ | |
709 | pfl->cfi_table[0x27] = ctz32(chip_len); | |
710 | /* Flash device interface (8 & 16 bits) */ | |
711 | pfl->cfi_table[0x28] = 0x02; | |
712 | pfl->cfi_table[0x29] = 0x00; | |
713 | /* Max number of bytes in multi-bytes write */ | |
714 | /* XXX: disable buffered write as it's not supported */ | |
715 | // pfl->cfi_table[0x2A] = 0x05; | |
716 | pfl->cfi_table[0x2A] = 0x00; | |
717 | pfl->cfi_table[0x2B] = 0x00; | |
718 | /* Number of erase block regions (uniform) */ | |
719 | pfl->cfi_table[0x2C] = 0x01; | |
720 | /* Erase block region 1 */ | |
721 | pfl->cfi_table[0x2D] = nb_blocs - 1; | |
722 | pfl->cfi_table[0x2E] = (nb_blocs - 1) >> 8; | |
723 | pfl->cfi_table[0x2F] = sector_len >> 8; | |
724 | pfl->cfi_table[0x30] = sector_len >> 16; | |
725 | ||
726 | /* Extended */ | |
727 | pfl->cfi_table[0x31] = 'P'; | |
728 | pfl->cfi_table[0x32] = 'R'; | |
729 | pfl->cfi_table[0x33] = 'I'; | |
730 | ||
731 | pfl->cfi_table[0x34] = '1'; | |
732 | pfl->cfi_table[0x35] = '0'; | |
733 | ||
734 | pfl->cfi_table[0x36] = 0x00; | |
735 | pfl->cfi_table[0x37] = 0x00; | |
736 | pfl->cfi_table[0x38] = 0x00; | |
737 | pfl->cfi_table[0x39] = 0x00; | |
738 | ||
739 | pfl->cfi_table[0x3a] = 0x00; | |
740 | ||
741 | pfl->cfi_table[0x3b] = 0x00; | |
742 | pfl->cfi_table[0x3c] = 0x00; | |
743 | ||
744 | return pfl; | |
745 | } |