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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;
wdenkefa329c2004-03-23 20:18:25 +000072 case INTEL_ID_28F640C3B:
73 info->flash_id = FLASH_28F640C3B;
74 info->sector_count = 135;
75 info->size = 0x02000000; /* 16 * 2 MB = 32 MB */
76 break;
wdenkcc1c8a12002-11-02 22:58:18 +000077 default:
78 return (0); /* no or unknown flash */
79 }
80
81 info->flash_id |= INTEL_MANUFACT << 16; /* set manufacturer offset */
82
83 if (info->flash_id & FLASH_BTYPE) {
84 volatile unsigned long *tmp = baseaddr;
85
86 /* set up sector start adress table (bottom sector type)
wdenkefa329c2004-03-23 20:18:25 +000087 * AND unlock the sectors (if our chip is 160C3 or 640C3)
wdenkcc1c8a12002-11-02 22:58:18 +000088 */
89 for (i = 0; i < info->sector_count; i++) {
wdenkefa329c2004-03-23 20:18:25 +000090 if (((info->flash_id & FLASH_TYPEMASK) == FLASH_28F160C3B) ||
91 ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F640C3B)) {
wdenkcc1c8a12002-11-02 22:58:18 +000092 tmp[0] = 0x00600060;
93 tmp[1] = 0x00600060;
94 tmp[0] = 0x00D000D0;
95 tmp[1] = 0x00D000D0;
96 }
97 info->start[i] = (uint) tmp;
98 tmp += i < 8 ? 0x2000 : 0x10000; /* pointer arith */
99 }
100 }
101
102 memset (info->protect, 0, info->sector_count);
103
104 baseaddr[0] = 0x00FF00FF;
105 baseaddr[1] = 0x00FF00FF;
106
107 return (info->size);
108}
109
110/*-----------------------------------------------------------------------
111 */
112unsigned long flash_init (void)
113{
114 unsigned long size_b0 = 0;
115 int i;
116
117 /* Init: no FLASHes known
118 */
119 for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
120 flash_info[i].flash_id = FLASH_UNKNOWN;
121 }
122
123 /* Static FLASH Bank configuration here (only one bank) */
124
125 size_b0 = flash_get_size ((ulong *) CFG_FLASH0_BASE, &flash_info[0]);
126 if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
127 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
128 size_b0, size_b0 >> 20);
129 }
130
131 /* protect monitor and environment sectors
132 */
133
134#ifndef CONFIG_BOOT_ROM
135 /* If U-Boot is booted from ROM the CFG_MONITOR_BASE > CFG_FLASH0_BASE
136 * but we shouldn't protect it.
137 */
138
139# if CFG_MONITOR_BASE >= CFG_FLASH0_BASE
140 flash_protect (FLAG_PROTECT_SET,
141 CFG_MONITOR_BASE,
wdenk3b57fe02003-05-30 12:48:29 +0000142 CFG_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]
wdenkcc1c8a12002-11-02 22:58:18 +0000143 );
144# endif
145#endif /* CONFIG_BOOT_ROM */
146
147#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR)
148# ifndef CFG_ENV_SIZE
149# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
150# endif
151 flash_protect (FLAG_PROTECT_SET,
152 CFG_ENV_ADDR,
153 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);
154#endif
155
156 return (size_b0);
157}
158
159/*-----------------------------------------------------------------------
160 */
161void flash_print_info (flash_info_t * info)
162{
163 int i;
164
165 if (info->flash_id == FLASH_UNKNOWN) {
166 printf ("missing or unknown FLASH type\n");
167 return;
168 }
169
170 switch ((info->flash_id >> 16) & 0xff) {
171 case 0x89:
172 printf ("INTEL ");
173 break;
174 default:
175 printf ("Unknown Vendor ");
176 break;
177 }
178
179 switch (info->flash_id & FLASH_TYPEMASK) {
180 case FLASH_28F160C3B:
181 printf ("28F160C3B (16 M, bottom sector)\n");
182 break;
183 case FLASH_28F160F3B:
184 printf ("28F160F3B (16 M, bottom sector)\n");
185 break;
wdenkefa329c2004-03-23 20:18:25 +0000186 case FLASH_28F640C3B:
187 printf ("28F640C3B (64 M, bottom sector)\n");
188 break;
wdenkcc1c8a12002-11-02 22:58:18 +0000189 default:
190 printf ("Unknown Chip Type\n");
191 break;
192 }
193
194 printf (" Size: %ld MB in %d Sectors\n",
195 info->size >> 20, info->sector_count);
196
197 printf (" Sector Start Addresses:");
198 for (i = 0; i < info->sector_count; ++i) {
199 if ((i % 5) == 0)
200 printf ("\n ");
201 printf (" %08lX%s",
202 info->start[i],
203 info->protect[i] ? " (RO)" : " "
204 );
205 }
206 printf ("\n");
207}
208
209/*-----------------------------------------------------------------------
210 */
211int flash_erase (flash_info_t * info, int s_first, int s_last)
212{
213 int flag, prot, sect;
214 ulong start, now, last;
215
216 if ((s_first < 0) || (s_first > s_last)) {
217 if (info->flash_id == FLASH_UNKNOWN) {
218 printf ("- missing\n");
219 } else {
220 printf ("- no sectors to erase\n");
221 }
222 return 1;
223 }
224
225 prot = 0;
226 for (sect = s_first; sect <= s_last; sect++) {
227 if (info->protect[sect])
228 prot++;
229 }
230
231 if (prot) {
232 printf ("- Warning: %d protected sectors will not be erased!\n",
233 prot);
234 } else {
235 printf ("\n");
236 }
237
238 /* Start erase on unprotected sectors
239 */
240 for (sect = s_first; sect <= s_last; sect++) {
241 volatile ulong *addr =
242 (volatile unsigned long *) info->start[sect];
243
244 start = get_timer (0);
245 last = start;
246 if (info->protect[sect] == 0) {
247 /* Disable interrupts which might cause a timeout here
248 */
249 flag = disable_interrupts ();
250
251 /* Erase the block
252 */
253 addr[0] = 0x00200020;
254 addr[1] = 0x00200020;
255 addr[0] = 0x00D000D0;
256 addr[1] = 0x00D000D0;
257
258 /* re-enable interrupts if necessary
259 */
260 if (flag)
261 enable_interrupts ();
262
263 /* wait at least 80us - let's wait 1 ms
264 */
265 udelay (1000);
266
267 last = start;
268 while ((addr[0] & 0x00800080) != 0x00800080 ||
269 (addr[1] & 0x00800080) != 0x00800080) {
270 if ((now = get_timer (start)) > CFG_FLASH_ERASE_TOUT) {
271 printf ("Timeout (erase suspended!)\n");
272 /* Suspend erase
273 */
274 addr[0] = 0x00B000B0;
275 addr[1] = 0x00B000B0;
276 goto DONE;
277 }
278 /* show that we're waiting
279 */
280 if ((now - last) > 1000) { /* every second */
281 serial_putc ('.');
282 last = now;
283 }
284 }
285 if (addr[0] & 0x00220022 || addr[1] & 0x00220022) {
286 printf ("*** ERROR: erase failed!\n");
287 goto DONE;
288 }
289 }
290 /* Clear status register and reset to read mode
291 */
292 addr[0] = 0x00500050;
293 addr[1] = 0x00500050;
294 addr[0] = 0x00FF00FF;
295 addr[1] = 0x00FF00FF;
296 }
297
298 printf (" done\n");
299
300DONE:
301 return 0;
302}
303
304static int write_word (flash_info_t *, volatile unsigned long *, ulong);
305
306/*-----------------------------------------------------------------------
307 * Copy memory to flash, returns:
308 * 0 - OK
309 * 1 - write timeout
310 * 2 - Flash not erased
311 */
312int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
313{
314 ulong v;
315 int i, l, cc = cnt, res = 0;
316
317
318 for (v=0; cc > 0; addr += 4, cc -= 4 - l) {
319 l = (addr & 3);
320 addr &= ~3;
321
322 for (i = 0; i < 4; i++) {
323 v = (v << 8) + (i < l || i - l >= cc ?
324 *((unsigned char *) addr + i) : *src++);
325 }
326
327 if ((res = write_word (info, (volatile unsigned long *) addr, v)) != 0)
328 break;
329 }
330
331 return (res);
332}
333
334/*-----------------------------------------------------------------------
335 * Write a word to Flash, returns:
336 * 0 - OK
337 * 1 - write timeout
338 * 2 - Flash not erased
339 */
340static int write_word (flash_info_t * info, volatile unsigned long *addr,
341 ulong data)
342{
343 int flag, res = 0;
344 ulong start;
345
346 /* Check if Flash is (sufficiently) erased
347 */
348 if ((*addr & data) != data)
349 return (2);
350
351 /* Disable interrupts which might cause a timeout here
352 */
353 flag = disable_interrupts ();
354
355 *addr = 0x00400040;
356 *addr = data;
357
358 /* re-enable interrupts if necessary
359 */
360 if (flag)
361 enable_interrupts ();
362
363 start = get_timer (0);
364 while ((*addr & 0x00800080) != 0x00800080) {
365 if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
366 /* Suspend program
367 */
368 *addr = 0x00B000B0;
369 res = 1;
370 goto OUT;
371 }
372 }
373
374 if (*addr & 0x00220022) {
375 printf ("*** ERROR: program failed!\n");
376 res = 1;
377 }
378
379OUT:
380 /* Clear status register and reset to read mode
381 */
382 *addr = 0x00500050;
383 *addr = 0x00FF00FF;
384
385 return (res);
386}