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2d5b561e 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 | * 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 | #include <common.h> | |
28 | #include <linux/byteorder/swab.h> | |
29 | ||
30 | ||
6d0f6bcf | 31 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
2d5b561e WD |
32 | |
33 | /* Board support for 1 or 2 flash devices */ | |
34 | #undef FLASH_PORT_WIDTH32 | |
35 | #define FLASH_PORT_WIDTH16 | |
36 | ||
37 | #ifdef FLASH_PORT_WIDTH16 | |
53677ef1 WD |
38 | #define FLASH_PORT_WIDTH ushort |
39 | #define FLASH_PORT_WIDTHV vu_short | |
40 | #define SWAP(x) x | |
2d5b561e | 41 | #else |
53677ef1 WD |
42 | #define FLASH_PORT_WIDTH ulong |
43 | #define FLASH_PORT_WIDTHV vu_long | |
44 | #define SWAP(x) __swab32(x) | |
2d5b561e WD |
45 | #endif |
46 | ||
53677ef1 WD |
47 | #define FPW FLASH_PORT_WIDTH |
48 | #define FPWV FLASH_PORT_WIDTHV | |
2d5b561e | 49 | |
53677ef1 | 50 | #define mb() __asm__ __volatile__ ("" : : : "memory") |
2d5b561e WD |
51 | |
52 | /*----------------------------------------------------------------------- | |
53 | * Functions | |
54 | */ | |
55 | static ulong flash_get_size (FPW * addr, flash_info_t * info); | |
56 | static int write_data (flash_info_t * info, ulong dest, FPW data); | |
57 | static void flash_get_offsets (ulong base, flash_info_t * info); | |
58 | void inline spin_wheel (void); | |
59 | ||
60 | /*----------------------------------------------------------------------- | |
61 | */ | |
62 | ||
63 | unsigned long flash_init (void) | |
64 | { | |
65 | int i; | |
66 | ulong size = 0; | |
67 | ||
6d0f6bcf | 68 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
2d5b561e WD |
69 | switch (i) { |
70 | case 0: | |
71 | flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]); | |
72 | flash_get_offsets (PHYS_FLASH_1, &flash_info[i]); | |
73 | break; | |
74 | default: | |
f6e20fc6 | 75 | panic ("configured too many flash banks!\n"); |
2d5b561e WD |
76 | break; |
77 | } | |
78 | size += flash_info[i].size; | |
79 | } | |
80 | ||
81 | /* Protect monitor and environment sectors | |
82 | */ | |
83 | flash_protect (FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
84 | CONFIG_SYS_FLASH_BASE, |
85 | CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start, | |
2d5b561e WD |
86 | &flash_info[0]); |
87 | ||
88 | flash_protect (FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
89 | CONFIG_ENV_ADDR, |
90 | CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); | |
2d5b561e WD |
91 | |
92 | return size; | |
93 | } | |
94 | ||
95 | /*----------------------------------------------------------------------- | |
96 | */ | |
97 | static void flash_get_offsets (ulong base, flash_info_t * info) | |
98 | { | |
99 | int i; | |
100 | ||
101 | if (info->flash_id == FLASH_UNKNOWN) { | |
102 | return; | |
103 | } | |
104 | ||
105 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { | |
106 | for (i = 0; i < info->sector_count; i++) { | |
107 | info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE); | |
108 | info->protect[i] = 0; | |
109 | } | |
110 | } | |
111 | } | |
112 | ||
113 | /*----------------------------------------------------------------------- | |
114 | */ | |
115 | void flash_print_info (flash_info_t * info) | |
116 | { | |
117 | int i; | |
118 | ||
119 | if (info->flash_id == FLASH_UNKNOWN) { | |
120 | printf ("missing or unknown FLASH type\n"); | |
121 | return; | |
122 | } | |
123 | ||
124 | switch (info->flash_id & FLASH_VENDMASK) { | |
125 | case FLASH_MAN_INTEL: | |
126 | printf ("INTEL "); | |
127 | break; | |
128 | default: | |
129 | printf ("Unknown Vendor "); | |
130 | break; | |
131 | } | |
132 | ||
133 | switch (info->flash_id & FLASH_TYPEMASK) { | |
134 | case FLASH_28F128J3A: | |
135 | printf ("28F128J3A\n"); | |
136 | break; | |
137 | default: | |
138 | printf ("Unknown Chip Type\n"); | |
139 | break; | |
140 | } | |
141 | ||
142 | printf (" Size: %ld MB in %d Sectors\n", | |
143 | info->size >> 20, info->sector_count); | |
144 | ||
145 | printf (" Sector Start Addresses:"); | |
146 | for (i = 0; i < info->sector_count; ++i) { | |
147 | if ((i % 5) == 0) | |
148 | printf ("\n "); | |
149 | printf (" %08lX%s", | |
150 | info->start[i], info->protect[i] ? " (RO)" : " "); | |
151 | } | |
152 | printf ("\n"); | |
153 | return; | |
154 | } | |
155 | ||
156 | /* | |
157 | * The following code cannot be run from FLASH! | |
158 | */ | |
159 | static ulong flash_get_size (FPW * addr, flash_info_t * info) | |
160 | { | |
161 | volatile FPW value; | |
162 | ||
163 | /* Write auto select command: read Manufacturer ID */ | |
164 | addr[0x5555] = (FPW) 0x00AA00AA; | |
165 | addr[0x2AAA] = (FPW) 0x00550055; | |
166 | addr[0x5555] = (FPW) 0x00900090; | |
167 | ||
168 | mb (); | |
169 | value = addr[0]; | |
170 | ||
171 | switch (value) { | |
172 | ||
173 | case (FPW) INTEL_MANUFACT: | |
174 | info->flash_id = FLASH_MAN_INTEL; | |
175 | break; | |
176 | ||
177 | default: | |
178 | info->flash_id = FLASH_UNKNOWN; | |
179 | info->sector_count = 0; | |
180 | info->size = 0; | |
181 | addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ | |
182 | return (0); /* no or unknown flash */ | |
183 | } | |
184 | ||
185 | mb (); | |
186 | value = addr[1]; /* device ID */ | |
187 | ||
188 | switch (value) { | |
189 | ||
190 | case (FPW) INTEL_ID_28F128J3A: | |
191 | info->flash_id += FLASH_28F128J3A; | |
192 | info->sector_count = 128; | |
193 | info->size = 0x02000000; | |
194 | break; /* => 16 MB */ | |
195 | ||
196 | default: | |
197 | info->flash_id = FLASH_UNKNOWN; | |
198 | break; | |
199 | } | |
200 | ||
6d0f6bcf | 201 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
2d5b561e | 202 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
203 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
204 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
2d5b561e WD |
205 | } |
206 | ||
207 | addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ | |
208 | ||
209 | return (info->size); | |
210 | } | |
211 | ||
212 | ||
213 | /*----------------------------------------------------------------------- | |
214 | */ | |
215 | ||
216 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
217 | { | |
218 | int flag, prot, sect; | |
219 | ulong type; | |
220 | int rcode = 0; | |
221 | ||
222 | if ((s_first < 0) || (s_first > s_last)) { | |
223 | if (info->flash_id == FLASH_UNKNOWN) { | |
224 | printf ("- missing\n"); | |
225 | } else { | |
226 | printf ("- no sectors to erase\n"); | |
227 | } | |
228 | return 1; | |
229 | } | |
230 | ||
231 | type = (info->flash_id & FLASH_VENDMASK); | |
232 | if ((type != FLASH_MAN_INTEL)) { | |
233 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
234 | info->flash_id); | |
235 | return 1; | |
236 | } | |
237 | ||
238 | prot = 0; | |
239 | for (sect = s_first; sect <= s_last; ++sect) { | |
240 | if (info->protect[sect]) { | |
241 | prot++; | |
242 | } | |
243 | } | |
244 | ||
245 | if (prot) { | |
246 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); | |
247 | } else { | |
248 | printf ("\n"); | |
249 | } | |
250 | ||
251 | /* Disable interrupts which might cause a timeout here */ | |
252 | flag = disable_interrupts (); | |
253 | ||
254 | /* Start erase on unprotected sectors */ | |
255 | for (sect = s_first; sect <= s_last; sect++) { | |
256 | if (info->protect[sect] == 0) { /* not protected */ | |
257 | FPWV *addr = (FPWV *) (info->start[sect]); | |
258 | FPW status; | |
259 | ||
260 | printf ("Erasing sector %2d ... ", sect); | |
261 | ||
262 | /* arm simple, non interrupt dependent timer */ | |
263 | reset_timer_masked (); | |
264 | ||
265 | *addr = (FPW) 0x00500050; /* clear status register */ | |
266 | *addr = (FPW) 0x00200020; /* erase setup */ | |
267 | *addr = (FPW) 0x00D000D0; /* erase confirm */ | |
268 | ||
269 | while (((status = | |
270 | *addr) & (FPW) 0x00800080) != | |
271 | (FPW) 0x00800080) { | |
272 | if (get_timer_masked () > | |
6d0f6bcf | 273 | CONFIG_SYS_FLASH_ERASE_TOUT) { |
2d5b561e WD |
274 | printf ("Timeout\n"); |
275 | *addr = (FPW) 0x00B000B0; /* suspend erase */ | |
276 | *addr = (FPW) 0x00FF00FF; /* reset to read mode */ | |
277 | rcode = 1; | |
278 | break; | |
279 | } | |
280 | } | |
281 | ||
282 | *addr = (FPW) 0x00500050; /* clear status register cmd. */ | |
283 | *addr = (FPW) 0x00FF00FF; /* resest to read mode */ | |
284 | ||
285 | printf (" done\n"); | |
286 | } | |
287 | } | |
288 | return rcode; | |
289 | } | |
290 | ||
291 | /*----------------------------------------------------------------------- | |
292 | * Copy memory to flash, returns: | |
293 | * 0 - OK | |
294 | * 1 - write timeout | |
295 | * 2 - Flash not erased | |
296 | * 4 - Flash not identified | |
297 | */ | |
298 | ||
299 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
300 | { | |
301 | ulong cp, wp; | |
302 | FPW data; | |
303 | int count, i, l, rc, port_width; | |
304 | ||
305 | if (info->flash_id == FLASH_UNKNOWN) { | |
306 | return 4; | |
307 | } | |
308 | ||
309 | /* get lower word aligned address */ | |
310 | #ifdef FLASH_PORT_WIDTH16 | |
311 | wp = (addr & ~1); | |
312 | port_width = 2; | |
313 | #else | |
314 | wp = (addr & ~3); | |
315 | port_width = 4; | |
316 | #endif | |
317 | ||
318 | /* | |
319 | * handle unaligned start bytes | |
320 | */ | |
321 | if ((l = addr - wp) != 0) { | |
322 | data = 0; | |
323 | for (i = 0, cp = wp; i < l; ++i, ++cp) { | |
324 | data = (data << 8) | (*(uchar *) cp); | |
325 | } | |
326 | for (; i < port_width && cnt > 0; ++i) { | |
327 | data = (data << 8) | *src++; | |
328 | --cnt; | |
329 | ++cp; | |
330 | } | |
331 | for (; cnt == 0 && i < port_width; ++i, ++cp) { | |
332 | data = (data << 8) | (*(uchar *) cp); | |
333 | } | |
334 | ||
335 | if ((rc = write_data (info, wp, SWAP (data))) != 0) { | |
336 | return (rc); | |
337 | } | |
338 | wp += port_width; | |
339 | } | |
340 | ||
341 | /* | |
342 | * handle word aligned part | |
343 | */ | |
344 | count = 0; | |
345 | while (cnt >= port_width) { | |
346 | data = 0; | |
347 | for (i = 0; i < port_width; ++i) { | |
348 | data = (data << 8) | *src++; | |
349 | } | |
350 | if ((rc = write_data (info, wp, SWAP (data))) != 0) { | |
351 | return (rc); | |
352 | } | |
353 | wp += port_width; | |
354 | cnt -= port_width; | |
355 | if (count++ > 0x800) { | |
356 | spin_wheel (); | |
357 | count = 0; | |
358 | } | |
359 | } | |
360 | ||
361 | if (cnt == 0) { | |
362 | return (0); | |
363 | } | |
364 | ||
365 | /* | |
366 | * handle unaligned tail bytes | |
367 | */ | |
368 | data = 0; | |
369 | for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) { | |
370 | data = (data << 8) | *src++; | |
371 | --cnt; | |
372 | } | |
373 | for (; i < port_width; ++i, ++cp) { | |
374 | data = (data << 8) | (*(uchar *) cp); | |
375 | } | |
376 | ||
377 | return (write_data (info, wp, SWAP (data))); | |
378 | } | |
379 | ||
380 | /*----------------------------------------------------------------------- | |
381 | * Write a word or halfword to Flash, returns: | |
382 | * 0 - OK | |
383 | * 1 - write timeout | |
384 | * 2 - Flash not erased | |
385 | */ | |
386 | static int write_data (flash_info_t * info, ulong dest, FPW data) | |
387 | { | |
388 | FPWV *addr = (FPWV *) dest; | |
389 | ulong status; | |
390 | int flag; | |
391 | ||
392 | /* Check if Flash is (sufficiently) erased */ | |
393 | if ((*addr & data) != data) { | |
394 | printf ("not erased at %08lx (%lx)\n", (ulong) addr, | |
395 | (ulong) * addr); | |
396 | return (2); | |
397 | } | |
398 | /* Disable interrupts which might cause a timeout here */ | |
399 | flag = disable_interrupts (); | |
400 | ||
401 | *addr = (FPW) 0x00400040; /* write setup */ | |
402 | *addr = data; | |
403 | ||
404 | /* arm simple, non interrupt dependent timer */ | |
405 | reset_timer_masked (); | |
406 | ||
407 | /* wait while polling the status register */ | |
408 | while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) { | |
6d0f6bcf | 409 | if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) { |
2d5b561e WD |
410 | *addr = (FPW) 0x00FF00FF; /* restore read mode */ |
411 | return (1); | |
412 | } | |
413 | } | |
414 | ||
415 | *addr = (FPW) 0x00FF00FF; /* restore read mode */ | |
416 | ||
417 | return (0); | |
418 | } | |
419 | ||
420 | void inline spin_wheel (void) | |
421 | { | |
422 | static int p = 0; | |
423 | static char w[] = "\\/-"; | |
424 | ||
425 | printf ("\010%c", w[p]); | |
426 | (++p == 3) ? (p = 0) : 0; | |
427 | } |