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wdenk16b013e2005-05-19 22:46:33 +00001/*
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
34flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
35
36#define mb() __asm__ __volatile__ ("" : : : "memory")
37
38/*-----------------------------------------------------------------------
39 * Functions
40 */
41static ulong flash_get_size (unsigned char * addr, flash_info_t * info);
42static int write_data (flash_info_t * info, ulong dest, unsigned char data);
43static void flash_get_offsets (ulong base, flash_info_t * info);
44void inline spin_wheel (void);
45
46/*-----------------------------------------------------------------------
47 */
48
49unsigned long flash_init (void)
50{
51 int i;
52 ulong size = 0;
53
54 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
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,
74 CFG_FLASH_BASE,
75 CFG_FLASH_BASE + _bss_start - _armboot_start,
76 &flash_info[0]);
77
78 return size;
79}
80
81/*-----------------------------------------------------------------------
82 */
83static 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 */
100void 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 */
144static 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
192 if (info->sector_count > CFG_MAX_FLASH_SECT) {
193 printf ("** ERROR: sector count %d > max (%d) **\n",
194 info->sector_count, CFG_MAX_FLASH_SECT);
195 info->sector_count = CFG_MAX_FLASH_SECT;
196 }
197
198 addr[0] = 0xFF; /* restore read mode */
199
200 return (info->size);
201}
202
203
204/*-----------------------------------------------------------------------
205 */
206
207int 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 () >
262 CFG_FLASH_ERASE_TOUT) {
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
288int 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 */
368static 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) {
391 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
392 *addr = 0xFF; /* restore read mode */
393 return (1);
394 }
395 }
396
397 *addr = 0xFF; /* restore read mode */
398
399 return (0);
400}
401
402void 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}