flash.c 14 KB

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  1. /*
  2. * (C) Copyright 2004-2005
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
  6. * Add support for Am29F016D and dynamic switch setting.
  7. *
  8. * See file CREDITS for list of people who contributed to this
  9. * project.
  10. *
  11. * This program is free software; you can redistribute it and/or
  12. * modify it under the terms of the GNU General Public License as
  13. * published by the Free Software Foundation; either version 2 of
  14. * the License, or (at your option) any later version.
  15. *
  16. * This program is distributed in the hope that it will be useful,
  17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19. * GNU General Public License for more details.
  20. *
  21. * You should have received a copy of the GNU General Public License
  22. * along with this program; if not, write to the Free Software
  23. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24. * MA 02111-1307 USA
  25. */
  26. /*
  27. * Modified 4/5/2001
  28. * Wait for completion of each sector erase command issued
  29. * 4/5/2001
  30. * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
  31. */
  32. #include <common.h>
  33. #include <ppc4xx.h>
  34. #include <asm/processor.h>
  35. flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
  36. /*-----------------------------------------------------------------------
  37. * Functions
  38. */
  39. static int write_word(flash_info_t * info, ulong dest, ulong data);
  40. void flash_print_info(flash_info_t * info)
  41. {
  42. int i;
  43. int k;
  44. int size;
  45. int erased;
  46. volatile unsigned long *flash;
  47. if (info->flash_id == FLASH_UNKNOWN) {
  48. printf("missing or unknown FLASH type\n");
  49. return;
  50. }
  51. switch (info->flash_id & FLASH_VENDMASK) {
  52. case FLASH_MAN_AMD:
  53. printf("AMD ");
  54. break;
  55. case FLASH_MAN_STM:
  56. printf("STM ");
  57. break;
  58. case FLASH_MAN_FUJ:
  59. printf("FUJITSU ");
  60. break;
  61. case FLASH_MAN_SST:
  62. printf("SST ");
  63. break;
  64. default:
  65. printf("Unknown Vendor ");
  66. break;
  67. }
  68. switch (info->flash_id & FLASH_TYPEMASK) {
  69. case FLASH_AM040:
  70. printf("AM29F040 (512 Kbit, uniform sector size)\n");
  71. break;
  72. case FLASH_AM400B:
  73. printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
  74. break;
  75. case FLASH_AM400T:
  76. printf("AM29LV400T (4 Mbit, top boot sector)\n");
  77. break;
  78. case FLASH_AM800B:
  79. printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
  80. break;
  81. case FLASH_AM800T:
  82. printf("AM29LV800T (8 Mbit, top boot sector)\n");
  83. break;
  84. case FLASH_AMD016:
  85. printf("AM29F016D (16 Mbit, uniform sector size)\n");
  86. break;
  87. case FLASH_AM160B:
  88. printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
  89. break;
  90. case FLASH_AM160T:
  91. printf("AM29LV160T (16 Mbit, top boot sector)\n");
  92. break;
  93. case FLASH_AM320B:
  94. printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
  95. break;
  96. case FLASH_AM320T:
  97. printf("AM29LV320T (32 Mbit, top boot sector)\n");
  98. break;
  99. case FLASH_AM033C:
  100. printf("AM29LV033C (32 Mbit, top boot sector)\n");
  101. break;
  102. case FLASH_SST800A:
  103. printf("SST39LF/VF800 (8 Mbit, uniform sector size)\n");
  104. break;
  105. case FLASH_SST160A:
  106. printf("SST39LF/VF160 (16 Mbit, uniform sector size)\n");
  107. break;
  108. default:
  109. printf("Unknown Chip Type\n");
  110. break;
  111. }
  112. printf(" Size: %ld KB in %d Sectors\n",
  113. info->size >> 10, info->sector_count);
  114. printf(" Sector Start Addresses:");
  115. for (i = 0; i < info->sector_count; ++i) {
  116. /*
  117. * Check if whole sector is erased
  118. */
  119. if (i != (info->sector_count - 1))
  120. size = info->start[i + 1] - info->start[i];
  121. else
  122. size = info->start[0] + info->size - info->start[i];
  123. erased = 1;
  124. flash = (volatile unsigned long *)info->start[i];
  125. size = size >> 2; /* divide by 4 for longword access */
  126. for (k = 0; k < size; k++) {
  127. if (*flash++ != 0xffffffff) {
  128. erased = 0;
  129. break;
  130. }
  131. }
  132. if ((i % 5) == 0)
  133. printf("\n ");
  134. printf(" %08lX%s%s",
  135. info->start[i],
  136. erased ? " E" : " ", info->protect[i] ? "RO " : " ");
  137. }
  138. printf("\n");
  139. return;
  140. }
  141. /*
  142. * The following code cannot be run from FLASH!
  143. */
  144. static ulong flash_get_size(vu_long * addr, flash_info_t * info)
  145. {
  146. short i;
  147. CFG_FLASH_WORD_SIZE value;
  148. ulong base = (ulong) addr;
  149. volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) addr;
  150. DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr);
  151. /* Write auto select command: read Manufacturer ID */
  152. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  153. addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  154. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00900090;
  155. udelay(1000);
  156. value = addr2[0];
  157. DEBUGF("FLASH MANUFACT: %x\n", value);
  158. switch (value) {
  159. case (CFG_FLASH_WORD_SIZE) AMD_MANUFACT:
  160. info->flash_id = FLASH_MAN_AMD;
  161. break;
  162. case (CFG_FLASH_WORD_SIZE) FUJ_MANUFACT:
  163. info->flash_id = FLASH_MAN_FUJ;
  164. break;
  165. case (CFG_FLASH_WORD_SIZE) SST_MANUFACT:
  166. info->flash_id = FLASH_MAN_SST;
  167. break;
  168. case (CFG_FLASH_WORD_SIZE) STM_MANUFACT:
  169. info->flash_id = FLASH_MAN_STM;
  170. break;
  171. default:
  172. info->flash_id = FLASH_UNKNOWN;
  173. info->sector_count = 0;
  174. info->size = 0;
  175. return (0); /* no or unknown flash */
  176. }
  177. value = addr2[1]; /* device ID */
  178. DEBUGF("\nFLASH DEVICEID: %x\n", value);
  179. switch (value) {
  180. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV040B:
  181. info->flash_id += FLASH_AM040;
  182. info->sector_count = 8;
  183. info->size = 0x0080000; /* => 512 ko */
  184. break;
  185. case (CFG_FLASH_WORD_SIZE) AMD_ID_F040B:
  186. info->flash_id += FLASH_AM040;
  187. info->sector_count = 8;
  188. info->size = 0x0080000; /* => 512 ko */
  189. break;
  190. case (CFG_FLASH_WORD_SIZE) STM_ID_M29W040B:
  191. info->flash_id += FLASH_AM040;
  192. info->sector_count = 8;
  193. info->size = 0x0080000; /* => 512 ko */
  194. break;
  195. case (CFG_FLASH_WORD_SIZE) AMD_ID_F016D:
  196. info->flash_id += FLASH_AMD016;
  197. info->sector_count = 32;
  198. info->size = 0x00200000;
  199. break; /* => 2 MB */
  200. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV033C:
  201. info->flash_id += FLASH_AMDLV033C;
  202. info->sector_count = 64;
  203. info->size = 0x00400000;
  204. break; /* => 4 MB */
  205. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400T:
  206. info->flash_id += FLASH_AM400T;
  207. info->sector_count = 11;
  208. info->size = 0x00080000;
  209. break; /* => 0.5 MB */
  210. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV400B:
  211. info->flash_id += FLASH_AM400B;
  212. info->sector_count = 11;
  213. info->size = 0x00080000;
  214. break; /* => 0.5 MB */
  215. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800T:
  216. info->flash_id += FLASH_AM800T;
  217. info->sector_count = 19;
  218. info->size = 0x00100000;
  219. break; /* => 1 MB */
  220. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV800B:
  221. info->flash_id += FLASH_AM800B;
  222. info->sector_count = 19;
  223. info->size = 0x00100000;
  224. break; /* => 1 MB */
  225. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160T:
  226. info->flash_id += FLASH_AM160T;
  227. info->sector_count = 35;
  228. info->size = 0x00200000;
  229. break; /* => 2 MB */
  230. case (CFG_FLASH_WORD_SIZE) AMD_ID_LV160B:
  231. info->flash_id += FLASH_AM160B;
  232. info->sector_count = 35;
  233. info->size = 0x00200000;
  234. break; /* => 2 MB */
  235. default:
  236. info->flash_id = FLASH_UNKNOWN;
  237. return (0); /* => no or unknown flash */
  238. }
  239. /* set up sector start address table */
  240. if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
  241. ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) ||
  242. ((info->flash_id & FLASH_TYPEMASK) == FLASH_AMD016)) {
  243. for (i = 0; i < info->sector_count; i++)
  244. info->start[i] = base + (i * 0x00010000);
  245. } else {
  246. if (info->flash_id & FLASH_BTYPE) {
  247. /* set sector offsets for bottom boot block type */
  248. info->start[0] = base + 0x00000000;
  249. info->start[1] = base + 0x00004000;
  250. info->start[2] = base + 0x00006000;
  251. info->start[3] = base + 0x00008000;
  252. for (i = 4; i < info->sector_count; i++) {
  253. info->start[i] =
  254. base + (i * 0x00010000) - 0x00030000;
  255. }
  256. } else {
  257. /* set sector offsets for top boot block type */
  258. i = info->sector_count - 1;
  259. info->start[i--] = base + info->size - 0x00004000;
  260. info->start[i--] = base + info->size - 0x00006000;
  261. info->start[i--] = base + info->size - 0x00008000;
  262. for (; i >= 0; i--) {
  263. info->start[i] = base + i * 0x00010000;
  264. }
  265. }
  266. }
  267. /* check for protected sectors */
  268. for (i = 0; i < info->sector_count; i++) {
  269. /* read sector protection at sector address, (A7 .. A0) = 0x02 */
  270. /* D0 = 1 if protected */
  271. addr2 = (volatile CFG_FLASH_WORD_SIZE *)(info->start[i]);
  272. /* For AMD29033C flash we need to resend the command of *
  273. * reading flash protection for upper 8 Mb of flash */
  274. if (i == 32) {
  275. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0xAAAAAAAA;
  276. addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x55555555;
  277. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x90909090;
  278. }
  279. if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
  280. info->protect[i] = 0;
  281. else
  282. info->protect[i] = addr2[2] & 1;
  283. }
  284. /* issue bank reset to return to read mode */
  285. addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0;
  286. return (info->size);
  287. }
  288. int wait_for_DQ7(flash_info_t * info, int sect)
  289. {
  290. ulong start, now, last;
  291. volatile CFG_FLASH_WORD_SIZE *addr =
  292. (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
  293. start = get_timer(0);
  294. last = start;
  295. while ((addr[0] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
  296. (CFG_FLASH_WORD_SIZE) 0x00800080) {
  297. if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
  298. printf("Timeout\n");
  299. return -1;
  300. }
  301. /* show that we're waiting */
  302. if ((now - last) > 1000) { /* every second */
  303. putc('.');
  304. last = now;
  305. }
  306. }
  307. return 0;
  308. }
  309. int flash_erase(flash_info_t * info, int s_first, int s_last)
  310. {
  311. volatile CFG_FLASH_WORD_SIZE *addr = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
  312. volatile CFG_FLASH_WORD_SIZE *addr2;
  313. int flag, prot, sect, l_sect;
  314. int i;
  315. if ((s_first < 0) || (s_first > s_last)) {
  316. if (info->flash_id == FLASH_UNKNOWN) {
  317. printf("- missing\n");
  318. } else {
  319. printf("- no sectors to erase\n");
  320. }
  321. return 1;
  322. }
  323. if (info->flash_id == FLASH_UNKNOWN) {
  324. printf("Can't erase unknown flash type - aborted\n");
  325. return 1;
  326. }
  327. prot = 0;
  328. for (sect = s_first; sect <= s_last; ++sect) {
  329. if (info->protect[sect]) {
  330. prot++;
  331. }
  332. }
  333. if (prot) {
  334. printf("- Warning: %d protected sectors will not be erased!\n",
  335. prot);
  336. } else {
  337. printf("\n");
  338. }
  339. l_sect = -1;
  340. /* Disable interrupts which might cause a timeout here */
  341. flag = disable_interrupts();
  342. /* Start erase on unprotected sectors */
  343. for (sect = s_first; sect <= s_last; sect++) {
  344. if (info->protect[sect] == 0) { /* not protected */
  345. addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[sect]);
  346. if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
  347. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  348. addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  349. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
  350. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  351. addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  352. addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00500050; /* block erase */
  353. for (i = 0; i < 50; i++)
  354. udelay(1000); /* wait 1 ms */
  355. } else {
  356. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  357. addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  358. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00800080;
  359. addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  360. addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  361. addr2[0] = (CFG_FLASH_WORD_SIZE) 0x00300030; /* sector erase */
  362. }
  363. l_sect = sect;
  364. /*
  365. * Wait for each sector to complete, it's more
  366. * reliable. According to AMD Spec, you must
  367. * issue all erase commands within a specified
  368. * timeout. This has been seen to fail, especially
  369. * if printf()s are included (for debug)!!
  370. */
  371. wait_for_DQ7(info, sect);
  372. }
  373. }
  374. /* re-enable interrupts if necessary */
  375. if (flag)
  376. enable_interrupts();
  377. /* wait at least 80us - let's wait 1 ms */
  378. udelay(1000);
  379. /* reset to read mode */
  380. addr = (CFG_FLASH_WORD_SIZE *) info->start[0];
  381. addr[0] = (CFG_FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
  382. printf(" done\n");
  383. return 0;
  384. }
  385. /*-----------------------------------------------------------------------
  386. * Copy memory to flash, returns:
  387. * 0 - OK
  388. * 1 - write timeout
  389. * 2 - Flash not erased
  390. */
  391. int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
  392. {
  393. ulong cp, wp, data;
  394. int i, l, rc;
  395. wp = (addr & ~3); /* get lower word aligned address */
  396. /*
  397. * handle unaligned start bytes
  398. */
  399. if ((l = addr - wp) != 0) {
  400. data = 0;
  401. for (i = 0, cp = wp; i < l; ++i, ++cp) {
  402. data = (data << 8) | (*(uchar *) cp);
  403. }
  404. for (; i < 4 && cnt > 0; ++i) {
  405. data = (data << 8) | *src++;
  406. --cnt;
  407. ++cp;
  408. }
  409. for (; cnt == 0 && i < 4; ++i, ++cp) {
  410. data = (data << 8) | (*(uchar *) cp);
  411. }
  412. if ((rc = write_word(info, wp, data)) != 0) {
  413. return (rc);
  414. }
  415. wp += 4;
  416. }
  417. /*
  418. * handle word aligned part
  419. */
  420. while (cnt >= 4) {
  421. data = 0;
  422. for (i = 0; i < 4; ++i) {
  423. data = (data << 8) | *src++;
  424. }
  425. if ((rc = write_word(info, wp, data)) != 0) {
  426. return (rc);
  427. }
  428. wp += 4;
  429. cnt -= 4;
  430. }
  431. if (cnt == 0) {
  432. return (0);
  433. }
  434. /*
  435. * handle unaligned tail bytes
  436. */
  437. data = 0;
  438. for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
  439. data = (data << 8) | *src++;
  440. --cnt;
  441. }
  442. for (; i < 4; ++i, ++cp) {
  443. data = (data << 8) | (*(uchar *) cp);
  444. }
  445. return (write_word(info, wp, data));
  446. }
  447. /*-----------------------------------------------------------------------
  448. * Write a word to Flash, returns:
  449. * 0 - OK
  450. * 1 - write timeout
  451. * 2 - Flash not erased
  452. */
  453. static int write_word(flash_info_t * info, ulong dest, ulong data)
  454. {
  455. volatile CFG_FLASH_WORD_SIZE *addr2 = (CFG_FLASH_WORD_SIZE *) (info->start[0]);
  456. volatile CFG_FLASH_WORD_SIZE *dest2 = (CFG_FLASH_WORD_SIZE *) dest;
  457. volatile CFG_FLASH_WORD_SIZE *data2 = (CFG_FLASH_WORD_SIZE *) & data;
  458. ulong start;
  459. int i;
  460. /* Check if Flash is (sufficiently) erased */
  461. if ((*((vu_long *)dest) & data) != data) {
  462. return (2);
  463. }
  464. for (i = 0; i < 4 / sizeof(CFG_FLASH_WORD_SIZE); i++) {
  465. int flag;
  466. /* Disable interrupts which might cause a timeout here */
  467. flag = disable_interrupts();
  468. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00AA00AA;
  469. addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE) 0x00550055;
  470. addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE) 0x00A000A0;
  471. dest2[i] = data2[i];
  472. /* re-enable interrupts if necessary */
  473. if (flag)
  474. enable_interrupts();
  475. /* data polling for D7 */
  476. start = get_timer(0);
  477. while ((dest2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080) !=
  478. (data2[i] & (CFG_FLASH_WORD_SIZE) 0x00800080)) {
  479. if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
  480. return (1);
  481. }
  482. }
  483. }
  484. return (0);
  485. }