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a56bd922 WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net | |
4 | * | |
5 | * (C) Copyright 2001 | |
6 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
7 | * | |
8 | * (C) Copyright 2003 | |
9 | * Texas Instruments, <www.ti.com> | |
10 | * Kshitij Gupta <Kshitij@ti.com> | |
11 | * | |
12 | * See file CREDITS for list of people who contributed to this | |
13 | * project. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation; either version 2 of | |
18 | * the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
28 | * MA 02111-1307 USA | |
29 | */ | |
30 | ||
31 | #include <common.h> | |
32 | #include <linux/byteorder/swab.h> | |
33 | ||
34 | #define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */ | |
6d0f6bcf | 35 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
a56bd922 WD |
36 | |
37 | /* Board support for 1 or 2 flash devices */ | |
38 | #undef FLASH_PORT_WIDTH32 | |
39 | #define FLASH_PORT_WIDTH16 | |
40 | ||
41 | #ifdef FLASH_PORT_WIDTH16 | |
42 | #define FLASH_PORT_WIDTH ushort | |
43 | #define FLASH_PORT_WIDTHV vu_short | |
44 | #define SWAP(x) __swab16(x) | |
45 | #else | |
46 | #define FLASH_PORT_WIDTH ulong | |
47 | #define FLASH_PORT_WIDTHV vu_long | |
48 | #define SWAP(x) __swab32(x) | |
49 | #endif | |
50 | ||
51 | #define FPW FLASH_PORT_WIDTH | |
52 | #define FPWV FLASH_PORT_WIDTHV | |
53 | ||
54 | #define mb() __asm__ __volatile__ ("" : : : "memory") | |
55 | ||
56 | ||
57 | /* Flash Organization Structure */ | |
58 | typedef struct OrgDef { | |
59 | unsigned int sector_number; | |
60 | unsigned int sector_size; | |
61 | } OrgDef; | |
62 | ||
63 | ||
64 | /* Flash Organizations */ | |
65 | OrgDef OrgIntel_28F256L18T[] = { | |
66 | {4, 32 * 1024}, /* 4 * 32kBytes sectors */ | |
67 | {255, 128 * 1024}, /* 255 * 128kBytes sectors */ | |
68 | }; | |
69 | ||
70 | ||
71 | /*----------------------------------------------------------------------- | |
72 | * Functions | |
73 | */ | |
74 | unsigned long flash_init (void); | |
75 | static ulong flash_get_size (FPW * addr, flash_info_t * info); | |
76 | static int write_data (flash_info_t * info, ulong dest, FPW data); | |
77 | static void flash_get_offsets (ulong base, flash_info_t * info); | |
78 | void inline spin_wheel (void); | |
79 | void flash_print_info (flash_info_t * info); | |
80 | void flash_unprotect_sectors (FPWV * addr); | |
81 | int flash_erase (flash_info_t * info, int s_first, int s_last); | |
82 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt); | |
83 | ||
84 | /*----------------------------------------------------------------------- | |
85 | */ | |
86 | ||
87 | unsigned long flash_init (void) | |
88 | { | |
89 | int i; | |
90 | ulong size = 0; | |
6d0f6bcf | 91 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
a56bd922 WD |
92 | switch (i) { |
93 | case 0: | |
94 | flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]); | |
95 | flash_get_offsets (PHYS_FLASH_1, &flash_info[i]); | |
96 | break; | |
97 | default: | |
98 | panic ("configured too many flash banks!\n"); | |
99 | break; | |
100 | } | |
101 | size += flash_info[i].size; | |
102 | } | |
103 | ||
104 | /* Protect monitor and environment sectors | |
105 | */ | |
106 | flash_protect (FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
107 | CONFIG_SYS_FLASH_BASE, |
108 | CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]); | |
a56bd922 WD |
109 | |
110 | flash_protect (FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
111 | CONFIG_ENV_ADDR, |
112 | CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); | |
a56bd922 WD |
113 | |
114 | return size; | |
115 | } | |
116 | ||
117 | /*----------------------------------------------------------------------- | |
118 | */ | |
119 | static void flash_get_offsets (ulong base, flash_info_t * info) | |
120 | { | |
121 | int i; | |
122 | OrgDef *pOrgDef; | |
123 | ||
124 | pOrgDef = OrgIntel_28F256L18T; | |
125 | if (info->flash_id == FLASH_UNKNOWN) { | |
126 | return; | |
127 | } | |
128 | ||
129 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { | |
130 | for (i = 0; i < info->sector_count; i++) { | |
131 | if (i > 255) { | |
132 | info->start[i] = base + (i * 0x8000); | |
133 | info->protect[i] = 0; | |
134 | } else { | |
135 | info->start[i] = base + | |
136 | (i * PHYS_FLASH_SECT_SIZE); | |
137 | info->protect[i] = 0; | |
138 | } | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
143 | /*----------------------------------------------------------------------- | |
144 | */ | |
145 | void flash_print_info (flash_info_t * info) | |
146 | { | |
147 | int i; | |
148 | ||
149 | if (info->flash_id == FLASH_UNKNOWN) { | |
150 | printf ("missing or unknown FLASH type\n"); | |
151 | return; | |
152 | } | |
153 | ||
154 | switch (info->flash_id & FLASH_VENDMASK) { | |
155 | case FLASH_MAN_INTEL: | |
156 | printf ("INTEL "); | |
157 | break; | |
158 | default: | |
159 | printf ("Unknown Vendor "); | |
160 | break; | |
161 | } | |
162 | ||
163 | switch (info->flash_id & FLASH_TYPEMASK) { | |
164 | case FLASH_28F256L18T: | |
165 | printf ("FLASH 28F256L18T\n"); | |
166 | break; | |
167 | default: | |
168 | printf ("Unknown Chip Type\n"); | |
169 | break; | |
170 | } | |
171 | ||
172 | printf (" Size: %ld MB in %d Sectors\n", | |
173 | info->size >> 20, info->sector_count); | |
174 | ||
175 | printf (" Sector Start Addresses:"); | |
176 | for (i = 0; i < info->sector_count; ++i) { | |
177 | if ((i % 5) == 0) | |
178 | printf ("\n "); | |
179 | printf (" %08lX%s", | |
180 | info->start[i], info->protect[i] ? " (RO)" : " "); | |
181 | } | |
182 | printf ("\n"); | |
183 | return; | |
184 | } | |
185 | ||
186 | /* | |
187 | * The following code cannot be run from FLASH! | |
188 | */ | |
189 | static ulong flash_get_size (FPW * addr, flash_info_t * info) | |
190 | { | |
191 | volatile FPW value; | |
192 | ||
193 | /* Write auto select command: read Manufacturer ID */ | |
194 | addr[0x5555] = (FPW) 0x00AA00AA; | |
195 | addr[0x2AAA] = (FPW) 0x00550055; | |
196 | addr[0x5555] = (FPW) 0x00900090; | |
197 | ||
198 | mb (); | |
199 | value = addr[0]; | |
200 | ||
201 | switch (value) { | |
202 | ||
203 | case (FPW) INTEL_MANUFACT: | |
204 | info->flash_id = FLASH_MAN_INTEL; | |
205 | break; | |
206 | ||
207 | default: | |
208 | info->flash_id = FLASH_UNKNOWN; | |
209 | info->sector_count = 0; | |
210 | info->size = 0; | |
211 | addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ | |
212 | return (0); /* no or unknown flash */ | |
213 | } | |
214 | ||
215 | mb (); | |
216 | value = addr[1]; /* device ID */ | |
217 | switch (value) { | |
218 | ||
219 | case (FPW) (INTEL_ID_28F256L18T): | |
220 | info->flash_id += FLASH_28F256L18T; | |
221 | info->sector_count = 259; | |
222 | info->size = 0x02000000; | |
223 | break; /* => 32 MB */ | |
224 | ||
225 | default: | |
226 | info->flash_id = FLASH_UNKNOWN; | |
227 | break; | |
228 | } | |
229 | ||
6d0f6bcf | 230 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
a56bd922 | 231 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
232 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
233 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
a56bd922 WD |
234 | } |
235 | ||
236 | addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ | |
237 | ||
238 | return (info->size); | |
239 | } | |
240 | ||
241 | ||
242 | /* unprotects a sector for write and erase | |
243 | * on some intel parts, this unprotects the entire chip, but it | |
244 | * wont hurt to call this additional times per sector... | |
245 | */ | |
246 | void flash_unprotect_sectors (FPWV * addr) | |
247 | { | |
248 | #define PD_FINTEL_WSMS_READY_MASK 0x0080 | |
249 | ||
250 | *addr = (FPW) 0x00500050; /* clear status register */ | |
251 | ||
252 | /* this sends the clear lock bit command */ | |
253 | *addr = (FPW) 0x00600060; | |
254 | *addr = (FPW) 0x00D000D0; | |
255 | } | |
256 | ||
257 | ||
258 | /*----------------------------------------------------------------------- | |
259 | */ | |
260 | ||
261 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
262 | { | |
263 | int flag, prot, sect; | |
264 | ulong type, start, last; | |
265 | int rcode = 0; | |
266 | ||
267 | if ((s_first < 0) || (s_first > s_last)) { | |
268 | if (info->flash_id == FLASH_UNKNOWN) { | |
269 | printf ("- missing\n"); | |
270 | } else { | |
271 | printf ("- no sectors to erase\n"); | |
272 | } | |
273 | return 1; | |
274 | } | |
275 | ||
276 | type = (info->flash_id & FLASH_VENDMASK); | |
277 | if ((type != FLASH_MAN_INTEL)) { | |
278 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
279 | info->flash_id); | |
280 | return 1; | |
281 | } | |
282 | ||
283 | prot = 0; | |
284 | for (sect = s_first; sect <= s_last; ++sect) { | |
285 | if (info->protect[sect]) { | |
286 | prot++; | |
287 | } | |
288 | } | |
289 | ||
290 | if (prot) { | |
291 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
292 | prot); | |
293 | } else { | |
294 | printf ("\n"); | |
295 | } | |
296 | ||
297 | ||
298 | start = get_timer (0); | |
299 | last = start; | |
300 | ||
301 | /* Disable interrupts which might cause a timeout here */ | |
302 | flag = disable_interrupts (); | |
303 | ||
304 | /* Start erase on unprotected sectors */ | |
305 | for (sect = s_first; sect <= s_last; sect++) { | |
306 | if (info->protect[sect] == 0) { /* not protected */ | |
307 | FPWV *addr = (FPWV *) (info->start[sect]); | |
308 | FPW status; | |
309 | ||
310 | printf ("Erasing sector %2d ... ", sect); | |
311 | ||
312 | flash_unprotect_sectors (addr); | |
313 | ||
314 | /* arm simple, non interrupt dependent timer */ | |
315 | reset_timer_masked (); | |
316 | ||
317 | *addr = (FPW) 0x00500050;/* clear status register */ | |
318 | *addr = (FPW) 0x00200020;/* erase setup */ | |
319 | *addr = (FPW) 0x00D000D0;/* erase confirm */ | |
320 | ||
321 | while (((status = | |
322 | *addr) & (FPW) 0x00800080) != | |
323 | (FPW) 0x00800080) { | |
324 | if (get_timer_masked () > | |
6d0f6bcf | 325 | CONFIG_SYS_FLASH_ERASE_TOUT) { |
a56bd922 WD |
326 | printf ("Timeout\n"); |
327 | /* suspend erase */ | |
328 | *addr = (FPW) 0x00B000B0; | |
329 | /* reset to read mode */ | |
330 | *addr = (FPW) 0x00FF00FF; | |
331 | rcode = 1; | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | /* clear status register cmd. */ | |
337 | *addr = (FPW) 0x00500050; | |
338 | *addr = (FPW) 0x00FF00FF;/* resest to read mode */ | |
339 | printf (" done\n"); | |
340 | } | |
341 | } | |
342 | return rcode; | |
343 | } | |
344 | ||
345 | /*----------------------------------------------------------------------- | |
346 | * Copy memory to flash, returns: | |
347 | * 0 - OK | |
348 | * 1 - write timeout | |
349 | * 2 - Flash not erased | |
350 | * 4 - Flash not identified | |
351 | */ | |
352 | ||
353 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
354 | { | |
355 | ulong cp, wp; | |
356 | FPW data; | |
357 | int count, i, l, rc, port_width; | |
358 | ||
359 | if (info->flash_id == FLASH_UNKNOWN) { | |
360 | return 4; | |
361 | } | |
362 | /* get lower word aligned address */ | |
363 | #ifdef FLASH_PORT_WIDTH16 | |
364 | wp = (addr & ~1); | |
365 | port_width = 2; | |
366 | #else | |
367 | wp = (addr & ~3); | |
368 | port_width = 4; | |
369 | #endif | |
370 | ||
371 | /* | |
372 | * handle unaligned start bytes | |
373 | */ | |
374 | if ((l = addr - wp) != 0) { | |
375 | data = 0; | |
376 | for (i = 0, cp = wp; i < l; ++i, ++cp) { | |
377 | data = (data << 8) | (*(uchar *) cp); | |
378 | } | |
379 | for (; i < port_width && cnt > 0; ++i) { | |
380 | data = (data << 8) | *src++; | |
381 | --cnt; | |
382 | ++cp; | |
383 | } | |
384 | for (; cnt == 0 && i < port_width; ++i, ++cp) { | |
385 | data = (data << 8) | (*(uchar *) cp); | |
386 | } | |
387 | ||
388 | if ((rc = write_data (info, wp, SWAP (data))) != 0) { | |
389 | return (rc); | |
390 | } | |
391 | wp += port_width; | |
392 | } | |
393 | ||
394 | /* | |
395 | * handle word aligned part | |
396 | */ | |
397 | count = 0; | |
398 | while (cnt >= port_width) { | |
399 | data = 0; | |
400 | for (i = 0; i < port_width; ++i) { | |
401 | data = (data << 8) | *src++; | |
402 | } | |
403 | if ((rc = write_data (info, wp, SWAP (data))) != 0) { | |
404 | return (rc); | |
405 | } | |
406 | wp += port_width; | |
407 | cnt -= port_width; | |
408 | if (count++ > 0x800) { | |
409 | spin_wheel (); | |
410 | count = 0; | |
411 | } | |
412 | } | |
413 | ||
414 | if (cnt == 0) { | |
415 | return (0); | |
416 | } | |
417 | ||
418 | /* | |
419 | * handle unaligned tail bytes | |
420 | */ | |
421 | data = 0; | |
422 | for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) { | |
423 | data = (data << 8) | *src++; | |
424 | --cnt; | |
425 | } | |
426 | for (; i < port_width; ++i, ++cp) { | |
427 | data = (data << 8) | (*(uchar *) cp); | |
428 | } | |
429 | ||
430 | return (write_data (info, wp, SWAP (data))); | |
431 | } | |
432 | ||
433 | /*----------------------------------------------------------------------- | |
434 | * Write a word or halfword to Flash, returns: | |
435 | * 0 - OK | |
436 | * 1 - write timeout | |
437 | * 2 - Flash not erased | |
438 | */ | |
439 | static int write_data (flash_info_t * info, ulong dest, FPW data) | |
440 | { | |
441 | FPWV *addr = (FPWV *) dest; | |
442 | ulong status; | |
443 | int flag; | |
444 | ||
445 | /* Check if Flash is (sufficiently) erased */ | |
446 | if ((*addr & data) != data) { | |
447 | printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr); | |
448 | return (2); | |
449 | } | |
450 | flash_unprotect_sectors (addr); | |
451 | /* Disable interrupts which might cause a timeout here */ | |
452 | flag = disable_interrupts (); | |
453 | *addr = (FPW) 0x00400040; /* write setup */ | |
454 | *addr = data; | |
455 | ||
456 | /* arm simple, non interrupt dependent timer */ | |
457 | reset_timer_masked (); | |
458 | ||
459 | /* wait while polling the status register */ | |
460 | while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) { | |
6d0f6bcf | 461 | if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) { |
a56bd922 WD |
462 | *addr = (FPW) 0x00FF00FF; /* restore read mode */ |
463 | return (1); | |
464 | } | |
465 | } | |
466 | *addr = (FPW) 0x00FF00FF; /* restore read mode */ | |
467 | return (0); | |
468 | } | |
469 | ||
470 | void inline spin_wheel (void) | |
471 | { | |
472 | static int p = 0; | |
473 | static char w[] = "\\/-"; | |
474 | ||
475 | printf ("\010%c", w[p]); | |
476 | (++p == 3) ? (p = 0) : 0; | |
477 | } |