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16b013e7 WD |
1 | /* |
2 | * (C) Copyright 2005 | |
3 | * Greg Ungerer, OpenGear Inc, greg.ungerer@opengear.com | |
4 | * | |
5 | * (C) Copyright 2001 | |
6 | * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net | |
7 | * | |
8 | * (C) Copyright 2001 | |
9 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
10 | * | |
11 | * See file CREDITS for list of people who contributed to this | |
12 | * project. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License as | |
16 | * published by the Free Software Foundation; either version 2 of | |
17 | * the License, or (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
27 | * MA 02111-1307 USA | |
28 | */ | |
29 | ||
30 | #include <common.h> | |
31 | #include <linux/byteorder/swab.h> | |
32 | ||
33 | ||
6d0f6bcf | 34 | flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
16b013e7 WD |
35 | |
36 | #define mb() __asm__ __volatile__ ("" : : : "memory") | |
37 | ||
38 | /*----------------------------------------------------------------------- | |
39 | * Functions | |
40 | */ | |
41 | static ulong flash_get_size (unsigned char * addr, flash_info_t * info); | |
42 | static int write_data (flash_info_t * info, ulong dest, unsigned char data); | |
43 | static void flash_get_offsets (ulong base, flash_info_t * info); | |
44 | void inline spin_wheel (void); | |
45 | ||
46 | /*----------------------------------------------------------------------- | |
47 | */ | |
48 | ||
49 | unsigned long flash_init (void) | |
50 | { | |
51 | int i; | |
52 | ulong size = 0; | |
53 | ||
6d0f6bcf | 54 | for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { |
16b013e7 WD |
55 | switch (i) { |
56 | case 0: | |
57 | flash_get_size ((unsigned char *) PHYS_FLASH_1, &flash_info[i]); | |
58 | flash_get_offsets (PHYS_FLASH_1, &flash_info[i]); | |
59 | break; | |
60 | case 1: | |
61 | /* ignore for now */ | |
62 | flash_info[i].flash_id = FLASH_UNKNOWN; | |
63 | break; | |
64 | default: | |
65 | panic ("configured too many flash banks!\n"); | |
66 | break; | |
67 | } | |
68 | size += flash_info[i].size; | |
69 | } | |
70 | ||
71 | /* Protect monitor and environment sectors | |
72 | */ | |
73 | flash_protect (FLAG_PROTECT_SET, | |
6d0f6bcf JCPV |
74 | CONFIG_SYS_FLASH_BASE, |
75 | CONFIG_SYS_FLASH_BASE + _bss_start - _armboot_start, | |
16b013e7 WD |
76 | &flash_info[0]); |
77 | ||
78 | return size; | |
79 | } | |
80 | ||
81 | /*----------------------------------------------------------------------- | |
82 | */ | |
83 | static void flash_get_offsets (ulong base, flash_info_t * info) | |
84 | { | |
85 | int i; | |
86 | ||
87 | if (info->flash_id == FLASH_UNKNOWN) | |
88 | return; | |
89 | ||
90 | if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { | |
91 | for (i = 0; i < info->sector_count; i++) { | |
92 | info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE); | |
93 | info->protect[i] = 0; | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | /*----------------------------------------------------------------------- | |
99 | */ | |
100 | void flash_print_info (flash_info_t * info) | |
101 | { | |
102 | int i; | |
103 | ||
104 | if (info->flash_id == FLASH_UNKNOWN) { | |
105 | printf ("missing or unknown FLASH type\n"); | |
106 | return; | |
107 | } | |
108 | ||
109 | switch (info->flash_id & FLASH_VENDMASK) { | |
110 | case FLASH_MAN_INTEL: | |
111 | printf ("INTEL "); | |
112 | break; | |
113 | default: | |
114 | printf ("Unknown Vendor "); | |
115 | break; | |
116 | } | |
117 | ||
118 | switch (info->flash_id & FLASH_TYPEMASK) { | |
119 | case FLASH_28F128J3A: | |
120 | printf ("28F128J3A\n"); | |
121 | break; | |
122 | default: | |
123 | printf ("Unknown Chip Type\n"); | |
124 | break; | |
125 | } | |
126 | ||
127 | printf (" Size: %ld MB in %d Sectors\n", | |
128 | info->size >> 20, info->sector_count); | |
129 | ||
130 | printf (" Sector Start Addresses:"); | |
131 | for (i = 0; i < info->sector_count; ++i) { | |
132 | if ((i % 5) == 0) | |
133 | printf ("\n "); | |
134 | printf (" %08lX%s", | |
135 | info->start[i], info->protect[i] ? " (RO)" : " "); | |
136 | } | |
137 | printf ("\n"); | |
138 | return; | |
139 | } | |
140 | ||
141 | /* | |
142 | * The following code cannot be run from FLASH! | |
143 | */ | |
144 | static ulong flash_get_size (unsigned char * addr, flash_info_t * info) | |
145 | { | |
146 | volatile unsigned char value; | |
147 | ||
148 | /* Write auto select command: read Manufacturer ID */ | |
149 | addr[0x5555] = 0xAA; | |
150 | addr[0x2AAA] = 0x55; | |
151 | addr[0x5555] = 0x90; | |
152 | ||
153 | mb (); | |
154 | value = addr[0]; | |
155 | ||
156 | switch (value) { | |
157 | ||
158 | case (unsigned char)INTEL_MANUFACT: | |
159 | info->flash_id = FLASH_MAN_INTEL; | |
160 | break; | |
161 | ||
162 | default: | |
163 | info->flash_id = FLASH_UNKNOWN; | |
164 | info->sector_count = 0; | |
165 | info->size = 0; | |
166 | addr[0] = 0xFF; /* restore read mode */ | |
167 | return (0); /* no or unknown flash */ | |
168 | } | |
169 | ||
170 | mb (); | |
171 | value = addr[2]; /* device ID */ | |
172 | ||
173 | switch (value) { | |
174 | ||
175 | case (unsigned char)INTEL_ID_28F640J3A: | |
176 | info->flash_id += FLASH_28F640J3A; | |
177 | info->sector_count = 64; | |
178 | info->size = 0x00800000; | |
179 | break; /* => 8 MB */ | |
180 | ||
181 | case (unsigned char)INTEL_ID_28F128J3A: | |
182 | info->flash_id += FLASH_28F128J3A; | |
183 | info->sector_count = 128; | |
184 | info->size = 0x01000000; | |
185 | break; /* => 16 MB */ | |
186 | ||
187 | default: | |
188 | info->flash_id = FLASH_UNKNOWN; | |
189 | break; | |
190 | } | |
191 | ||
6d0f6bcf | 192 | if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { |
16b013e7 | 193 | printf ("** ERROR: sector count %d > max (%d) **\n", |
6d0f6bcf JCPV |
194 | info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); |
195 | info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; | |
16b013e7 WD |
196 | } |
197 | ||
198 | addr[0] = 0xFF; /* restore read mode */ | |
199 | ||
200 | return (info->size); | |
201 | } | |
202 | ||
203 | ||
204 | /*----------------------------------------------------------------------- | |
205 | */ | |
206 | ||
207 | int flash_erase (flash_info_t * info, int s_first, int s_last) | |
208 | { | |
209 | int flag, prot, sect; | |
210 | ulong type; | |
211 | int rcode = 0; | |
212 | ||
213 | if ((s_first < 0) || (s_first > s_last)) { | |
214 | if (info->flash_id == FLASH_UNKNOWN) { | |
215 | printf ("- missing\n"); | |
216 | } else { | |
217 | printf ("- no sectors to erase\n"); | |
218 | } | |
219 | return 1; | |
220 | } | |
221 | ||
222 | type = (info->flash_id & FLASH_VENDMASK); | |
223 | if ((type != FLASH_MAN_INTEL)) { | |
224 | printf ("Can't erase unknown flash type %08lx - aborted\n", | |
225 | info->flash_id); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | prot = 0; | |
230 | for (sect = s_first; sect <= s_last; ++sect) { | |
231 | if (info->protect[sect]) { | |
232 | prot++; | |
233 | } | |
234 | } | |
235 | ||
236 | if (prot) | |
237 | printf ("- Warning: %d protected sectors will not be erased!\n", prot); | |
238 | else | |
239 | printf ("\n"); | |
240 | ||
241 | /* Disable interrupts which might cause a timeout here */ | |
242 | flag = disable_interrupts (); | |
243 | ||
244 | /* Start erase on unprotected sectors */ | |
245 | for (sect = s_first; sect <= s_last; sect++) { | |
246 | if (info->protect[sect] == 0) { /* not protected */ | |
247 | volatile unsigned char *addr; | |
248 | unsigned char status; | |
249 | ||
250 | printf ("Erasing sector %2d ... ", sect); | |
251 | ||
252 | /* arm simple, non interrupt dependent timer */ | |
253 | reset_timer_masked (); | |
254 | ||
255 | addr = (volatile unsigned char *) (info->start[sect]); | |
256 | *addr = 0x50; /* clear status register */ | |
257 | *addr = 0x20; /* erase setup */ | |
258 | *addr = 0xD0; /* erase confirm */ | |
259 | ||
260 | while (((status = *addr) & 0x80) != 0x80) { | |
261 | if (get_timer_masked () > | |
6d0f6bcf | 262 | CONFIG_SYS_FLASH_ERASE_TOUT) { |
16b013e7 WD |
263 | printf ("Timeout\n"); |
264 | *addr = 0xB0; /* suspend erase */ | |
265 | *addr = 0xFF; /* reset to read mode */ | |
266 | rcode = 1; | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
271 | *addr = 0x50; /* clear status register cmd */ | |
272 | *addr = 0xFF; /* resest to read mode */ | |
273 | ||
274 | printf (" done\n"); | |
275 | } | |
276 | } | |
277 | return rcode; | |
278 | } | |
279 | ||
280 | /*----------------------------------------------------------------------- | |
281 | * Copy memory to flash, returns: | |
282 | * 0 - OK | |
283 | * 1 - write timeout | |
284 | * 2 - Flash not erased | |
285 | * 4 - Flash not identified | |
286 | */ | |
287 | ||
288 | int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) | |
289 | { | |
290 | ulong cp, wp; | |
291 | unsigned char data; | |
292 | int count, i, l, rc, port_width; | |
293 | ||
294 | if (info->flash_id == FLASH_UNKNOWN) | |
295 | return 4; | |
296 | ||
297 | wp = addr; | |
298 | port_width = 1; | |
299 | ||
300 | /* | |
301 | * handle unaligned start bytes | |
302 | */ | |
303 | if ((l = addr - wp) != 0) { | |
304 | data = 0; | |
305 | for (i = 0, cp = wp; i < l; ++i, ++cp) { | |
306 | data = (data << 8) | (*(uchar *) cp); | |
307 | } | |
308 | for (; i < port_width && cnt > 0; ++i) { | |
309 | data = (data << 8) | *src++; | |
310 | --cnt; | |
311 | ++cp; | |
312 | } | |
313 | for (; cnt == 0 && i < port_width; ++i, ++cp) { | |
314 | data = (data << 8) | (*(uchar *) cp); | |
315 | } | |
316 | ||
317 | if ((rc = write_data (info, wp, data)) != 0) { | |
318 | return (rc); | |
319 | } | |
320 | wp += port_width; | |
321 | } | |
322 | ||
323 | /* | |
324 | * handle word aligned part | |
325 | */ | |
326 | count = 0; | |
327 | while (cnt >= port_width) { | |
328 | data = 0; | |
329 | for (i = 0; i < port_width; ++i) { | |
330 | data = (data << 8) | *src++; | |
331 | } | |
332 | if ((rc = write_data (info, wp, data)) != 0) { | |
333 | return (rc); | |
334 | } | |
335 | wp += port_width; | |
336 | cnt -= port_width; | |
337 | if (count++ > 0x800) { | |
338 | spin_wheel (); | |
339 | count = 0; | |
340 | } | |
341 | } | |
342 | ||
343 | if (cnt == 0) { | |
344 | return (0); | |
345 | } | |
346 | ||
347 | /* | |
348 | * handle unaligned tail bytes | |
349 | */ | |
350 | data = 0; | |
351 | for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) { | |
352 | data = (data << 8) | *src++; | |
353 | --cnt; | |
354 | } | |
355 | for (; i < port_width; ++i, ++cp) { | |
356 | data = (data << 8) | (*(uchar *) cp); | |
357 | } | |
358 | ||
359 | return (write_data (info, wp, data)); | |
360 | } | |
361 | ||
362 | /*----------------------------------------------------------------------- | |
363 | * Write a word or halfword to Flash, returns: | |
364 | * 0 - OK | |
365 | * 1 - write timeout | |
366 | * 2 - Flash not erased | |
367 | */ | |
368 | static int write_data (flash_info_t * info, ulong dest, unsigned char data) | |
369 | { | |
370 | volatile unsigned char *addr = (volatile unsigned char *) dest; | |
371 | ulong status; | |
372 | int flag; | |
373 | ||
374 | /* Check if Flash is (sufficiently) erased */ | |
375 | if ((*addr & data) != data) { | |
376 | printf ("not erased at %08lx (%lx)\n", (ulong) addr, | |
377 | (ulong) * addr); | |
378 | return (2); | |
379 | } | |
380 | /* Disable interrupts which might cause a timeout here */ | |
381 | flag = disable_interrupts (); | |
382 | ||
383 | *addr = 0x40; /* write setup */ | |
384 | *addr = data; | |
385 | ||
386 | /* arm simple, non interrupt dependent timer */ | |
387 | reset_timer_masked (); | |
388 | ||
389 | /* wait while polling the status register */ | |
390 | while (((status = *addr) & 0x80) != 0x80) { | |
6d0f6bcf | 391 | if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) { |
16b013e7 WD |
392 | *addr = 0xFF; /* restore read mode */ |
393 | return (1); | |
394 | } | |
395 | } | |
396 | ||
397 | *addr = 0xFF; /* restore read mode */ | |
398 | ||
399 | return (0); | |
400 | } | |
401 | ||
402 | void inline spin_wheel (void) | |
403 | { | |
404 | static int p = 0; | |
405 | static char w[] = "\\/-"; | |
406 | ||
407 | printf ("\010%c", w[p]); | |
408 | (++p == 3) ? (p = 0) : 0; | |
409 | } |