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fe8c2806 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 AMD 29F080B 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 | ||
6d0f6bcf | 34 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; |
fe8c2806 WD |
35 | |
36 | /*----------------------------------------------------------------------- | |
37 | * Functions | |
38 | */ | |
39 | ||
40 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); | |
41 | static int write_word (flash_info_t *info, ulong dest, ulong data); | |
42 | ||
43 | /*----------------------------------------------------------------------- | |
44 | */ | |
45 | ||
46 | unsigned long flash_init (void) | |
47 | { | |
48 | unsigned long size; | |
49 | int i; | |
50 | ||
51 | /* Init: no FLASHes known */ | |
6d0f6bcf | 52 | for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { |
fe8c2806 WD |
53 | flash_info[i].flash_id = FLASH_UNKNOWN; |
54 | } | |
55 | ||
56 | /* for now, only support the 4 MB Flash SIMM */ | |
6d0f6bcf | 57 | size = flash_get_size((vu_long *)CONFIG_SYS_FLASH0_BASE, &flash_info[0]); |
fe8c2806 WD |
58 | |
59 | /* | |
60 | * protect monitor and environment sectors | |
61 | */ | |
62 | ||
6d0f6bcf | 63 | #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE |
fe8c2806 | 64 | flash_protect(FLAG_PROTECT_SET, |
6d0f6bcf JCPV |
65 | CONFIG_SYS_MONITOR_BASE, |
66 | CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, | |
fe8c2806 WD |
67 | &flash_info[0]); |
68 | #endif | |
69 | ||
0e8d1586 JCPV |
70 | #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) |
71 | # ifndef CONFIG_ENV_SIZE | |
72 | # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE | |
fe8c2806 WD |
73 | # endif |
74 | flash_protect(FLAG_PROTECT_SET, | |
0e8d1586 JCPV |
75 | CONFIG_ENV_ADDR, |
76 | CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, | |
fe8c2806 WD |
77 | &flash_info[0]); |
78 | #endif | |
79 | ||
6d0f6bcf | 80 | return /*size*/ (CONFIG_SYS_FLASH0_SIZE * 1024 * 1024); |
fe8c2806 WD |
81 | } |
82 | ||
83 | /*----------------------------------------------------------------------- | |
84 | */ | |
85 | void flash_print_info (flash_info_t *info) | |
86 | { | |
87 | int i; | |
88 | ||
89 | if (info->flash_id == FLASH_UNKNOWN) { | |
90 | printf ("missing or unknown FLASH type\n"); | |
91 | return; | |
92 | } | |
93 | ||
94 | switch ((info->flash_id >> 16) & 0xff) { | |
95 | case 0x1: | |
96 | printf ("AMD "); | |
97 | break; | |
98 | default: | |
99 | printf ("Unknown Vendor "); | |
100 | break; | |
101 | } | |
102 | ||
103 | switch (info->flash_id & FLASH_TYPEMASK) { | |
104 | case AMD_ID_F040B: | |
105 | printf ("AM29F040B (4 Mbit)\n"); | |
106 | break; | |
107 | case AMD_ID_F080B: | |
108 | printf ("AM29F080B (8 Mbit)\n"); | |
109 | break; | |
110 | default: | |
111 | printf ("Unknown Chip Type\n"); | |
112 | break; | |
113 | } | |
114 | ||
115 | printf (" Size: %ld MB in %d Sectors\n", | |
116 | info->size >> 20, info->sector_count); | |
117 | ||
118 | printf (" Sector Start Addresses:"); | |
119 | for (i=0; i<info->sector_count; ++i) { | |
120 | if ((i % 5) == 0) | |
121 | printf ("\n "); | |
122 | printf (" %08lX%s", | |
123 | info->start[i], | |
124 | info->protect[i] ? " (RO)" : " " | |
125 | ); | |
126 | } | |
127 | printf ("\n"); | |
128 | return; | |
129 | } | |
130 | ||
131 | /* | |
132 | * The following code cannot be run from FLASH! | |
133 | */ | |
134 | ||
135 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) | |
136 | { | |
137 | short i; | |
138 | vu_long vendor, devid; | |
139 | ulong base = (ulong)addr; | |
140 | ||
141 | /* printf("addr = %08lx\n", (unsigned long)addr); */ | |
142 | ||
143 | /* Reset and Write auto select command: read Manufacturer ID */ | |
144 | addr[0] = 0xf0f0f0f0; | |
145 | addr[0x0555] = 0xAAAAAAAA; | |
146 | addr[0x02AA] = 0x55555555; | |
147 | addr[0x0555] = 0x90909090; | |
148 | udelay (1000); | |
149 | ||
150 | vendor = addr[0]; | |
151 | /* printf("vendor = %08lx\n", vendor); */ | |
152 | if (vendor != 0x01010101) { | |
153 | info->size = 0; | |
154 | goto out; | |
155 | } | |
156 | ||
157 | devid = addr[1]; | |
158 | /* printf("devid = %08lx\n", devid); */ | |
159 | ||
160 | if ((devid & 0xff) == AMD_ID_F080B) { | |
161 | info->flash_id = (vendor & 0xff) << 16 | AMD_ID_F080B; | |
162 | /* we have 16 sectors with 64KB each x 4 */ | |
163 | info->sector_count = 16; | |
164 | info->size = 4 * info->sector_count * 64*1024; | |
165 | } | |
166 | else { | |
167 | info->size = 0; | |
168 | goto out; | |
169 | } | |
170 | ||
171 | /* check for protected sectors */ | |
172 | for (i = 0; i < info->sector_count; i++) { | |
173 | /* sector base address */ | |
174 | info->start[i] = base + i * (info->size / info->sector_count); | |
175 | /* read sector protection at sector address, (A7 .. A0) = 0x02 */ | |
176 | /* D0 = 1 if protected */ | |
177 | addr = (volatile unsigned long *)(info->start[i]); | |
178 | info->protect[i] = addr[2] & 1; | |
179 | } | |
180 | ||
181 | /* reset command */ | |
182 | addr = (vu_long *)info->start[0]; | |
183 | ||
184 | out: | |
185 | addr[0] = 0xf0f0f0f0; | |
186 | ||
187 | return info->size; | |
188 | } | |
189 | ||
190 | ||
191 | /*----------------------------------------------------------------------- | |
192 | */ | |
193 | ||
194 | int flash_erase (flash_info_t *info, int s_first, int s_last) | |
195 | { | |
196 | vu_long *addr = (vu_long*)(info->start[0]); | |
197 | int flag, prot, sect, l_sect; | |
198 | ulong start, now, last; | |
199 | ||
200 | if ((s_first < 0) || (s_first > s_last)) { | |
201 | if (info->flash_id == FLASH_UNKNOWN) { | |
202 | printf ("- missing\n"); | |
203 | } else { | |
204 | printf ("- no sectors to erase\n"); | |
205 | } | |
206 | return 1; | |
207 | } | |
208 | ||
209 | prot = 0; | |
210 | for (sect = s_first; sect <= s_last; sect++) { | |
211 | if (info->protect[sect]) { | |
212 | prot++; | |
213 | } | |
214 | } | |
215 | ||
216 | if (prot) { | |
217 | printf ("- Warning: %d protected sectors will not be erased!\n", | |
218 | prot); | |
219 | } else { | |
220 | printf ("\n"); | |
221 | } | |
222 | ||
223 | l_sect = -1; | |
224 | ||
225 | /* Disable interrupts which might cause a timeout here */ | |
226 | flag = disable_interrupts(); | |
227 | ||
228 | addr[0x0555] = 0xAAAAAAAA; | |
229 | addr[0x02AA] = 0x55555555; | |
230 | addr[0x0555] = 0x80808080; | |
231 | addr[0x0555] = 0xAAAAAAAA; | |
232 | addr[0x02AA] = 0x55555555; | |
233 | udelay (100); | |
234 | ||
235 | /* Start erase on unprotected sectors */ | |
236 | for (sect = s_first; sect<=s_last; sect++) { | |
237 | if (info->protect[sect] == 0) { /* not protected */ | |
238 | addr = (vu_long*)(info->start[sect]); | |
239 | addr[0] = 0x30303030; | |
240 | l_sect = sect; | |
241 | } | |
242 | } | |
243 | ||
244 | /* re-enable interrupts if necessary */ | |
245 | if (flag) | |
246 | enable_interrupts(); | |
247 | ||
248 | /* wait at least 80us - let's wait 1 ms */ | |
249 | udelay (1000); | |
250 | ||
251 | /* | |
252 | * We wait for the last triggered sector | |
253 | */ | |
254 | if (l_sect < 0) | |
255 | goto DONE; | |
256 | ||
257 | start = get_timer (0); | |
258 | last = start; | |
259 | addr = (vu_long*)(info->start[l_sect]); | |
260 | while ((addr[0] & 0x80808080) != 0x80808080) { | |
6d0f6bcf | 261 | if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { |
fe8c2806 WD |
262 | printf ("Timeout\n"); |
263 | return 1; | |
264 | } | |
265 | /* show that we're waiting */ | |
266 | if ((now - last) > 1000) { /* every second */ | |
267 | serial_putc ('.'); | |
268 | last = now; | |
269 | } | |
270 | } | |
271 | ||
272 | DONE: | |
273 | /* reset to read mode */ | |
274 | addr = (volatile unsigned long *)info->start[0]; | |
275 | addr[0] = 0xF0F0F0F0; /* reset bank */ | |
276 | ||
277 | printf (" done\n"); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /*----------------------------------------------------------------------- | |
282 | * Copy memory to flash, returns: | |
283 | * 0 - OK | |
284 | * 1 - write timeout | |
285 | * 2 - Flash not erased | |
286 | */ | |
287 | ||
288 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) | |
289 | { | |
290 | ulong cp, wp, data; | |
291 | int i, l, rc; | |
292 | ||
293 | wp = (addr & ~3); /* get lower word aligned address */ | |
294 | ||
295 | /* | |
296 | * handle unaligned start bytes | |
297 | */ | |
298 | if ((l = addr - wp) != 0) { | |
299 | data = 0; | |
300 | for (i=0, cp=wp; i<l; ++i, ++cp) { | |
301 | data = (data << 8) | (*(uchar *)cp); | |
302 | } | |
303 | for (; i<4 && cnt>0; ++i) { | |
304 | data = (data << 8) | *src++; | |
305 | --cnt; | |
306 | ++cp; | |
307 | } | |
308 | for (; cnt==0 && i<4; ++i, ++cp) { | |
309 | data = (data << 8) | (*(uchar *)cp); | |
310 | } | |
311 | ||
312 | if ((rc = write_word(info, wp, data)) != 0) { | |
313 | return (rc); | |
314 | } | |
315 | wp += 4; | |
316 | } | |
317 | ||
318 | /* | |
319 | * handle word aligned part | |
320 | */ | |
321 | while (cnt >= 4) { | |
322 | data = 0; | |
323 | for (i=0; i<4; ++i) { | |
324 | data = (data << 8) | *src++; | |
325 | } | |
326 | if ((rc = write_word(info, wp, data)) != 0) { | |
327 | return (rc); | |
328 | } | |
329 | wp += 4; | |
330 | cnt -= 4; | |
331 | } | |
332 | ||
333 | if (cnt == 0) { | |
334 | return (0); | |
335 | } | |
336 | ||
337 | /* | |
338 | * handle unaligned tail bytes | |
339 | */ | |
340 | data = 0; | |
341 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { | |
342 | data = (data << 8) | *src++; | |
343 | --cnt; | |
344 | } | |
345 | for (; i<4; ++i, ++cp) { | |
346 | data = (data << 8) | (*(uchar *)cp); | |
347 | } | |
348 | ||
349 | return (write_word(info, wp, data)); | |
350 | } | |
351 | ||
352 | /*----------------------------------------------------------------------- | |
353 | * Write a word to Flash, returns: | |
354 | * 0 - OK | |
355 | * 1 - write timeout | |
356 | * 2 - Flash not erased | |
357 | */ | |
358 | static int write_word (flash_info_t *info, ulong dest, ulong data) | |
359 | { | |
360 | vu_long *addr = (vu_long*)(info->start[0]); | |
361 | ulong start; | |
362 | int flag; | |
363 | ||
364 | /* Check if Flash is (sufficiently) erased */ | |
365 | if ((*((vu_long *)dest) & data) != data) { | |
366 | return (2); | |
367 | } | |
368 | /* Disable interrupts which might cause a timeout here */ | |
369 | flag = disable_interrupts(); | |
370 | ||
371 | addr[0x0555] = 0xAAAAAAAA; | |
372 | addr[0x02AA] = 0x55555555; | |
373 | addr[0x0555] = 0xA0A0A0A0; | |
374 | ||
375 | *((vu_long *)dest) = data; | |
376 | ||
377 | /* re-enable interrupts if necessary */ | |
378 | if (flag) | |
379 | enable_interrupts(); | |
380 | ||
381 | /* data polling for D7 */ | |
382 | start = get_timer (0); | |
383 | while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) { | |
6d0f6bcf | 384 | if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { |
fe8c2806 WD |
385 | return (1); |
386 | } | |
387 | } | |
388 | return (0); | |
389 | } | |
390 | ||
391 | /*----------------------------------------------------------------------- | |
392 | */ |