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wdenkcc1c8a12002-11-02 22:58:18 +00001/*
2 * (C) Copyright 2001, 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * Flash Routines for Intel devices
6 *
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 <mpc8xx.h>
29
30
31flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
32
33/*-----------------------------------------------------------------------
34 */
35ulong flash_get_size (volatile unsigned long *baseaddr,
36 flash_info_t * info)
37{
38 short i;
39 unsigned long flashtest_h, flashtest_l;
40
41 info->sector_count = info->size = 0;
42 info->flash_id = FLASH_UNKNOWN;
43
44 /* Write query command sequence and test FLASH answer
45 */
46 baseaddr[0] = 0x00980098;
47 baseaddr[1] = 0x00980098;
48
49 flashtest_h = baseaddr[0]; /* manufacturer ID */
50 flashtest_l = baseaddr[1];
51
52 if (flashtest_h != INTEL_MANUFACT || flashtest_l != INTEL_MANUFACT)
53 return (0); /* no or unknown flash */
54
55 flashtest_h = baseaddr[2]; /* device ID */
56 flashtest_l = baseaddr[3];
57
58 if (flashtest_h != flashtest_l)
59 return (0);
60
61 switch (flashtest_h) {
62 case INTEL_ID_28F160C3B:
63 info->flash_id = FLASH_28F160C3B;
64 info->sector_count = 39;
65 info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
66 break;
67 case INTEL_ID_28F160F3B:
68 info->flash_id = FLASH_28F160F3B;
69 info->sector_count = 39;
70 info->size = 0x00800000; /* 4 * 2 MB = 8 MB */
71 break;
72 default:
73 return (0); /* no or unknown flash */
74 }
75
76 info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
77
78 if (info->flash_id & FLASH_BTYPE) {
79 volatile unsigned long *tmp = baseaddr;
80
81 /* set up sector start adress table (bottom sector type)
82 * AND unlock the sectors (if our chip is 160C3)
83 */
84 for (i = 0; i < info->sector_count; i++) {
85 if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) {
86 tmp[0] = 0x00600060;
87 tmp[1] = 0x00600060;
88 tmp[0] = 0x00D000D0;
89 tmp[1] = 0x00D000D0;
90 }
91 info->start[i] = (uint) tmp;
92 tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
93 }
94 }
95
96 memset (info->protect, 0, info->sector_count);
97
98 baseaddr[0] = 0x00FF00FF;
99 baseaddr[1] = 0x00FF00FF;
100
101 return (info->size);
102}
103
104/*-----------------------------------------------------------------------
105 */
106unsigned long flash_init (void)
107{
108 unsigned long size_b0 = 0;
109 int i;
110
111 /* Init: no FLASHes known
112 */
113 for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
114 flash_info[i].flash_id = FLASH_UNKNOWN;
115 }
116
117 /* Static FLASH Bank configuration here (only one bank) */
118
119 size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
120 if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
121 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
122 size_b0, size_b0 >> 20);
123 }
124
125 /* protect monitor and environment sectors
126 */
127
128#ifndef CONFIG_BOOT_ROM
129 /* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
130 * but we shouldn't protect it.
131 */
132
133# if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
134 flash_protect (FLAG_PROTECT_SET,
135 CFG_MONITOR_BASE,
136 CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1, &flash_info[0]
137 );
138# endif
139#endif /* CONFIG_BOOT_ROM */
140
141#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
142# ifndef CFG_ENV_SIZE
143# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
144# endif
145 flash_protect (FLAG_PROTECT_SET,
146 CFG_ENV_ADDR,
147 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
148#endif
149
150 return (size_b0);
151}
152
153/*-----------------------------------------------------------------------
154 */
155void flash_print_info (flash_info_t * info)
156{
157 int i;
158
159 if (info->flash_id == FLASH_UNKNOWN) {
160 printf ("missing or unknown FLASH type\n");
161 return;
162 }
163
164 switch ((info->flash_id >> 16) & 0xff) {
165 case 0x89:
166 printf ("INTEL ");
167 break;
168 default:
169 printf ("Unknown Vendor ");
170 break;
171 }
172
173 switch (info->flash_id & FLASH_TYPEMASK) {
174 case FLASH_28F160C3B:
175 printf ("28F160C3B (16 M, bottom sector)\n");
176 break;
177 case FLASH_28F160F3B:
178 printf ("28F160F3B (16 M, bottom sector)\n");
179 break;
180 default:
181 printf ("Unknown Chip Type\n");
182 break;
183 }
184
185 printf (" Size: %ld MB in %d Sectors\n",
186 info->size >> 20, info->sector_count);
187
188 printf (" Sector Start Addresses:");
189 for (i = 0; i < info->sector_count; ++i) {
190 if ((i % 5) == 0)
191 printf ("\n ");
192 printf (" %08lX%s",
193 info->start[i],
194 info->protect[i] ? " (RO)" : " "
195 );
196 }
197 printf ("\n");
198}
199
200/*-----------------------------------------------------------------------
201 */
202int flash_erase (flash_info_t * info, int s_first, int s_last)
203{
204 int flag, prot, sect;
205 ulong start, now, last;
206
207 if ((s_first < 0) || (s_first > s_last)) {
208 if (info->flash_id == FLASH_UNKNOWN) {
209 printf ("- missing\n");
210 } else {
211 printf ("- no sectors to erase\n");
212 }
213 return 1;
214 }
215
216 prot = 0;
217 for (sect = s_first; sect <= s_last; sect++) {
218 if (info->protect[sect])
219 prot++;
220 }
221
222 if (prot) {
223 printf ("- Warning: %d protected sectors will not be erased!\n",
224 prot);
225 } else {
226 printf ("\n");
227 }
228
229 /* Start erase on unprotected sectors
230 */
231 for (sect = s_first; sect <= s_last; sect++) {
232 volatile ulong *addr =
233 (volatile unsigned long *) info->start[sect];
234
235 start = get_timer (0);
236 last = start;
237 if (info->protect[sect] == 0) {
238 /* Disable interrupts which might cause a timeout here
239 */
240 flag = disable_interrupts ();
241
242 /* Erase the block
243 */
244 addr[0] = 0x00200020;
245 addr[1] = 0x00200020;
246 addr[0] = 0x00D000D0;
247 addr[1] = 0x00D000D0;
248
249 /* re-enable interrupts if necessary
250 */
251 if (flag)
252 enable_interrupts ();
253
254 /* wait at least 80us - let's wait 1 ms
255 */
256 udelay (1000);
257
258 last = start;
259 while ((addr[0] & 0x00800080) != 0x00800080 ||
260 (addr[1] & 0x00800080) != 0x00800080) {
261 if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
262 printf ("Timeout (erase suspended!)\n");
263 /* Suspend erase
264 */
265 addr[0] = 0x00B000B0;
266 addr[1] = 0x00B000B0;
267 goto DONE;
268 }
269 /* show that we're waiting
270 */
271 if ((now - last) > 1000) { /* every second */
272 serial_putc ('.');
273 last = now;
274 }
275 }
276 if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
277 printf ("*** ERROR: erase failed!\n");
278 goto DONE;
279 }
280 }
281 /* Clear status register and reset to read mode
282 */
283 addr[0] = 0x00500050;
284 addr[1] = 0x00500050;
285 addr[0] = 0x00FF00FF;
286 addr[1] = 0x00FF00FF;
287 }
288
289 printf (" done\n");
290
291DONE:
292 return 0;
293}
294
295static int write_word (flash_info_t *, volatile unsigned long *, ulong);
296
297/*-----------------------------------------------------------------------
298 * Copy memory to flash, returns:
299 * 0 - OK
300 * 1 - write timeout
301 * 2 - Flash not erased
302 */
303int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
304{
305 ulong v;
306 int i, l, cc = cnt, res = 0;
307
308
309 for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
310 l = (addr & 3);
311 addr &= ~3;
312
313 for (i = 0; i < 4; i++) {
314 v = (v << 8) + (i < l || i - l >= cc ?
315 *((unsigned char *) addr + i) : *src++);
316 }
317
318 if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
319 break;
320 }
321
322 return (res);
323}
324
325/*-----------------------------------------------------------------------
326 * Write a word to Flash, returns:
327 * 0 - OK
328 * 1 - write timeout
329 * 2 - Flash not erased
330 */
331static int write_word (flash_info_t * info, volatile unsigned long *addr,
332 ulong data)
333{
334 int flag, res = 0;
335 ulong start;
336
337 /* Check if Flash is (sufficiently) erased
338 */
339 if ((*addr & data) != data)
340 return (2);
341
342 /* Disable interrupts which might cause a timeout here
343 */
344 flag = disable_interrupts ();
345
346 *addr = 0x00400040;
347 *addr = data;
348
349 /* re-enable interrupts if necessary
350 */
351 if (flag)
352 enable_interrupts ();
353
354 start = get_timer (0);
355 while ((*addr & 0x00800080) != 0x00800080) {
356 if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
357 /* Suspend program
358 */
359 *addr = 0x00B000B0;
360 res = 1;
361 goto OUT;
362 }
363 }
364
365 if (*addr & 0x00220022) {
366 printf ("*** ERROR: program failed!\n");
367 res = 1;
368 }
369
370OUT:
371 /* Clear status register and reset to read mode
372 */
373 *addr = 0x00500050;
374 *addr = 0x00FF00FF;
375
376 return (res);
377}