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affae2bf WD |
1 | /* |
2 | * (C) Copyright 2000 | |
3 | * Marius Groeger <mgroeger@sysgo.de> | |
4 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
5 | * | |
6 | * (C) Copyright 2000 | |
7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
8 | * | |
9 | * Flash Routines for AM290[48]0B devices | |
10 | * | |
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 <mpc8xx.h> | |
33 | #include "vpd.h" | |
34 | ||
6d0f6bcf | 35 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
affae2bf WD |
36 | |
37 | /*----------------------------------------------------------------------- | |
38 | * Functions | |
39 | */ | |
40 | ||
41 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); | |
42 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
43 | ||
44 | /*----------------------------------------------------------------------- | |
45 | */ | |
46 | ||
47 | unsigned long flash_init (void) | |
48 | { | |
49 | unsigned long size, totsize; | |
50 | int i; | |
51 | ulong addr; | |
52 | ||
53 | /* Init: no FLASHes known */ | |
6d0f6bcf | 54 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
affae2bf WD |
55 | flash_info[i].flash_id = FLASH_UNKNOWN; |
56 | } | |
57 | ||
58 | totsize = 0; | |
59 | addr = 0xfc000000; | |
6d0f6bcf | 60 | for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
affae2bf WD |
61 | size = flash_get_size((vu_long *)addr, &flash_info[i]); |
62 | if (flash_info[i].flash_id == FLASH_UNKNOWN) | |
63 | break; | |
64 | totsize += size; | |
65 | addr += size; | |
66 | } | |
67 | ||
68 | addr = 0xfe000000; | |
6d0f6bcf | 69 | for(i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
affae2bf WD |
70 | |
71 | size = flash_get_size((vu_long *)addr, &flash_info[i]); | |
72 | if (flash_info[i].flash_id == FLASH_UNKNOWN) | |
73 | break; | |
74 | totsize += size; | |
75 | addr += size; | |
76 | } | |
77 | ||
6d0f6bcf | 78 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE |
affae2bf WD |
79 | /* monitor protection ON by default */ |
80 | flash_protect(FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
81 | CONFIG_SYS_MONITOR_BASE, |
82 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
affae2bf WD |
83 | &flash_info[0]); |
84 | #endif | |
85 | ||
86 | return (totsize); | |
87 | } | |
88 | ||
89 | /*----------------------------------------------------------------------- | |
90 | */ | |
91 | void flash_print_info (flash_info_t *info) | |
92 | { | |
93 | int i; | |
94 | ||
95 | if (info->flash_id == FLASH_UNKNOWN) { | |
96 | printf ("missing or unknown FLASH type\n"); | |
97 | return; | |
98 | } | |
99 | ||
100 | switch (info->flash_id >> 16) { | |
101 | case 0x1: | |
102 | printf ("AMD "); | |
103 | break; | |
104 | default: | |
105 | printf ("Unknown Vendor "); | |
106 | break; | |
107 | } | |
108 | ||
109 | switch (info->flash_id & FLASH_TYPEMASK) { | |
110 | case AMD_ID_F040B: | |
111 | printf ("AM29F040B (4 Mbit)\n"); | |
112 | break; | |
113 | case AMD_ID_F080B: | |
114 | printf ("AM29F080B (8 Mbit)\n"); | |
115 | break; | |
116 | case AMD_ID_F016D: | |
117 | printf ("AM29F016D (16 Mbit)\n"); | |
118 | break; | |
119 | default: | |
120 | printf ("Unknown Chip Type\n"); | |
121 | break; | |
122 | } | |
123 | ||
124 | printf (" Size: %ld MB in %d Sectors\n", | |
125 | info->size >> 20, info->sector_count); | |
126 | ||
127 | printf (" Sector Start Addresses:"); | |
128 | for (i=0; i<info->sector_count; ++i) { | |
129 | if ((i % 5) == 0) | |
130 | printf ("\n "); | |
131 | printf (" %08lX%s", | |
132 | info->start[i], | |
133 | info->protect[i] ? " (RO)" : " " | |
134 | ); | |
135 | } | |
136 | printf ("\n"); | |
137 | return; | |
138 | } | |
139 | ||
140 | /* | |
141 | * The following code cannot be run from FLASH! | |
142 | */ | |
143 | ||
144 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
145 | { | |
146 | short i; | |
147 | ulong vendor, devid; | |
148 | ulong base = (ulong)addr; | |
149 | ||
150 | /* Write auto select command: read Manufacturer ID */ | |
151 | addr[0x0555] = 0xAAAAAAAA; | |
152 | addr[0x02AA] = 0x55555555; | |
153 | addr[0x0555] = 0x90909090; | |
154 | ||
155 | vendor = addr[0]; | |
156 | devid = addr[1] & 0xff; | |
157 | ||
158 | /* only support AMD */ | |
159 | if (vendor != 0x01010101) { | |
160 | return 0; | |
161 | } | |
162 | ||
163 | vendor &= 0xf; | |
164 | devid &= 0xff; | |
165 | ||
166 | if (devid == AMD_ID_F040B) { | |
167 | info->flash_id = vendor << 16 | devid; | |
168 | info->sector_count = 8; | |
169 | info->size = info->sector_count * 0x10000; | |
170 | } | |
171 | else if (devid == AMD_ID_F080B) { | |
172 | info->flash_id = vendor << 16 | devid; | |
173 | info->sector_count = 16; | |
174 | info->size = 4 * info->sector_count * 0x10000; | |
175 | } | |
176 | else if (devid == AMD_ID_F016D) { | |
177 | info->flash_id = vendor << 16 | devid; | |
178 | info->sector_count = 32; | |
179 | info->size = 4 * info->sector_count * 0x10000; | |
180 | } | |
181 | else { | |
182 | printf ("## Unknown Flash Type: %08lx\n", devid); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | /* check for protected sectors */ | |
187 | for (i = 0; i < info->sector_count; i++) { | |
188 | /* sector base address */ | |
189 | info->start[i] = base + i * (info->size / info->sector_count); | |
190 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
191 | /* D0 = 1 if protected */ | |
192 | addr = (volatile unsigned long *)(info->start[i]); | |
193 | info->protect[i] = addr[2] & 1; | |
194 | } | |
195 | ||
196 | /* | |
197 | * Prevent writes to uninitialized FLASH. | |
198 | */ | |
199 | if (info->flash_id != FLASH_UNKNOWN) { | |
200 | addr = (vu_long *)info->start[0]; | |
201 | addr[0] = 0xF0; /* reset bank */ | |
202 | } | |
203 | ||
204 | return (info->size); | |
205 | } | |
206 | ||
207 | ||
208 | /*----------------------------------------------------------------------- | |
209 | */ | |
210 | ||
211 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
212 | { | |
213 | vu_long *addr = (vu_long*)(info->start[0]); | |
214 | int flag, prot, sect, l_sect; | |
215 | ulong start, now, last; | |
216 | ||
217 | if ((s_first < 0) || (s_first > s_last)) { | |
218 | if (info->flash_id == FLASH_UNKNOWN) { | |
219 | printf ("- missing\n"); | |
220 | } else { | |
221 | printf ("- no sectors to erase\n"); | |
222 | } | |
223 | return 1; | |
224 | } | |
225 | ||
226 | prot = 0; | |
227 | for (sect = s_first; sect <= s_last; sect++) { | |
228 | if (info->protect[sect]) { | |
229 | prot++; | |
230 | } | |
231 | } | |
232 | ||
233 | if (prot) { | |
234 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
235 | prot); | |
236 | } else { | |
237 | printf ("\n"); | |
238 | } | |
239 | ||
240 | l_sect = -1; | |
241 | ||
242 | /* Disable interrupts which might cause a timeout here */ | |
243 | flag = disable_interrupts(); | |
244 | ||
245 | addr[0x0555] = 0XAAAAAAAA; | |
246 | addr[0x02AA] = 0x55555555; | |
247 | addr[0x0555] = 0x80808080; | |
248 | addr[0x0555] = 0XAAAAAAAA; | |
249 | addr[0x02AA] = 0x55555555; | |
250 | ||
251 | /* Start erase on unprotected sectors */ | |
252 | for (sect = s_first; sect<=s_last; sect++) { | |
253 | if (info->protect[sect] == 0) { /* not protected */ | |
254 | addr = (vu_long*)(info->start[sect]); | |
255 | addr[0] = 0x30303030; | |
256 | l_sect = sect; | |
257 | } | |
258 | } | |
259 | ||
260 | /* re-enable interrupts if necessary */ | |
261 | if (flag) | |
262 | enable_interrupts(); | |
263 | ||
264 | /* wait at least 80us - let's wait 1 ms */ | |
265 | udelay (1000); | |
266 | ||
267 | /* | |
268 | * We wait for the last triggered sector | |
269 | */ | |
270 | if (l_sect < 0) | |
271 | goto DONE; | |
272 | ||
273 | start = get_timer (0); | |
274 | last = start; | |
275 | addr = (vu_long*)(info->start[l_sect]); | |
276 | while ((addr[0] & 0x80808080) != 0x80808080) { | |
6d0f6bcf | 277 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
affae2bf WD |
278 | printf ("Timeout\n"); |
279 | return 1; | |
280 | } | |
281 | /* show that we're waiting */ | |
282 | if ((now - last) > 1000) { /* every second */ | |
283 | serial_putc ('.'); | |
284 | last = now; | |
285 | } | |
286 | } | |
287 | ||
288 | DONE: | |
289 | /* reset to read mode */ | |
290 | addr = (volatile unsigned long *)info->start[0]; | |
291 | addr[0] = 0xF0F0F0F0; /* reset bank */ | |
292 | ||
293 | printf (" done\n"); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | /*----------------------------------------------------------------------- | |
298 | * Copy memory to flash, returns: | |
299 | * 0 - OK | |
300 | * 1 - write timeout | |
301 | * 2 - Flash not erased | |
302 | */ | |
303 | ||
304 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
305 | { | |
306 | ulong cp, wp, data; | |
307 | int i, l, rc; | |
308 | ||
309 | wp = (addr & ~3); /* get lower word aligned address */ | |
310 | ||
311 | /* | |
312 | * handle unaligned start bytes | |
313 | */ | |
314 | if ((l = addr - wp) != 0) { | |
315 | data = 0; | |
316 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
317 | data = (data << 8) | (*(uchar *)cp); | |
318 | } | |
319 | for (; i<4 && cnt>0; ++i) { | |
320 | data = (data << 8) | *src++; | |
321 | --cnt; | |
322 | ++cp; | |
323 | } | |
324 | for (; cnt==0 && i<4; ++i, ++cp) { | |
325 | data = (data << 8) | (*(uchar *)cp); | |
326 | } | |
327 | ||
328 | if ((rc = write_word(info, wp, data)) != 0) { | |
329 | return (rc); | |
330 | } | |
331 | wp += 4; | |
332 | } | |
333 | ||
334 | /* | |
335 | * handle word aligned part | |
336 | */ | |
337 | while (cnt >= 4) { | |
338 | data = 0; | |
339 | for (i=0; i<4; ++i) { | |
340 | data = (data << 8) | *src++; | |
341 | } | |
342 | if ((rc = write_word(info, wp, data)) != 0) { | |
343 | return (rc); | |
344 | } | |
345 | wp += 4; | |
346 | cnt -= 4; | |
347 | } | |
348 | ||
349 | if (cnt == 0) { | |
350 | return (0); | |
351 | } | |
352 | ||
353 | /* | |
354 | * handle unaligned tail bytes | |
355 | */ | |
356 | data = 0; | |
357 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
358 | data = (data << 8) | *src++; | |
359 | --cnt; | |
360 | } | |
361 | for (; i<4; ++i, ++cp) { | |
362 | data = (data << 8) | (*(uchar *)cp); | |
363 | } | |
364 | ||
365 | return (write_word(info, wp, data)); | |
366 | } | |
367 | ||
368 | /*----------------------------------------------------------------------- | |
369 | * Write a word to Flash, returns: | |
370 | * 0 - OK | |
371 | * 1 - write timeout | |
372 | * 2 - Flash not erased | |
373 | */ | |
374 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
375 | { | |
376 | vu_long *addr = (vu_long*)(info->start[0]); | |
377 | ulong start; | |
378 | int flag; | |
379 | ||
380 | /* Check if Flash is (sufficiently) erased */ | |
381 | if ((*((vu_long *)dest) & data) != data) { | |
382 | return (2); | |
383 | } | |
384 | /* Disable interrupts which might cause a timeout here */ | |
385 | flag = disable_interrupts(); | |
386 | ||
387 | addr[0x0555] = 0xAAAAAAAA; | |
388 | addr[0x02AA] = 0x55555555; | |
389 | addr[0x0555] = 0xA0A0A0A0; | |
390 | ||
391 | *((vu_long *)dest) = data; | |
392 | ||
393 | /* re-enable interrupts if necessary */ | |
394 | if (flag) | |
395 | enable_interrupts(); | |
396 | ||
397 | /* data polling for D7 */ | |
398 | start = get_timer (0); | |
399 | while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) { | |
6d0f6bcf | 400 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
affae2bf WD |
401 | return (1); |
402 | } | |
403 | } | |
404 | return (0); | |
405 | } | |
406 | ||
407 | /*----------------------------------------------------------------------- | |
408 | */ |