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wdenk2e5983d2003-07-15 20:04:06 +00001/*
2 * (C) Copyright 2001
3 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
4 *
5 * (C) Copyright 2001
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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 <linux/byteorder/swab.h>
29
30#define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */
31flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
32
33/* Board support for 1 or 2 flash devices */
34#undef FLASH_PORT_WIDTH32
35#define FLASH_PORT_WIDTH16
36
37#ifdef FLASH_PORT_WIDTH16
38#define FLASH_PORT_WIDTH ushort
39#define FLASH_PORT_WIDTHV vu_short
40#define SWAP(x) __swab16(x)
41#else
42#define FLASH_PORT_WIDTH ulong
43#define FLASH_PORT_WIDTHV vu_long
44#define SWAP(x) __swab32(x)
45#endif
46
47#define FPW FLASH_PORT_WIDTH
48#define FPWV FLASH_PORT_WIDTHV
49
50#define mb() __asm__ __volatile__ ("" : : : "memory")
51
52/*-----------------------------------------------------------------------
53 * Functions
54 */
55static ulong flash_get_size (FPW * addr, flash_info_t * info);
56static int write_data (flash_info_t * info, ulong dest, FPW data);
57static void flash_get_offsets (ulong base, flash_info_t * info);
58void inline spin_wheel (void);
59
60/*-----------------------------------------------------------------------
61 */
62
63unsigned long flash_init (void)
64{
65 int i;
66 ulong size = 0;
67
68 for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
69 switch (i) {
70 case 0:
71 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
72 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
73 break;
74 default:
wdenk5f535fe2003-09-18 09:21:33 +000075 panic ("configured too many flash banks!\n");
wdenk2e5983d2003-07-15 20:04:06 +000076 break;
77 }
78 size += flash_info[i].size;
79 }
80
81 /* Protect monitor and environment sectors
82 */
83 flash_protect ( FLAG_PROTECT_SET,
84 CFG_FLASH_BASE,
85 CFG_FLASH_BASE + monitor_flash_len - 1,
86 &flash_info[0]);
87
88 flash_protect ( FLAG_PROTECT_SET,
89 CFG_ENV_ADDR,
90 CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
91 &flash_info[0]);
92
93 return size;
94}
95
96/*-----------------------------------------------------------------------
97 */
98static void flash_get_offsets (ulong base, flash_info_t * info)
99{
100 int i;
101
102 if (info->flash_id == FLASH_UNKNOWN) {
103 return;
104 }
105
106 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
107 for (i = 0; i < info->sector_count; i++) {
108 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
109 info->protect[i] = 0;
110 }
111 }
112}
113
114/*-----------------------------------------------------------------------
115 */
116void flash_print_info (flash_info_t * info)
117{
118 int i;
119
120 if (info->flash_id == FLASH_UNKNOWN) {
121 printf ("missing or unknown FLASH type\n");
122 return;
123 }
124
125 switch (info->flash_id & FLASH_VENDMASK) {
126 case FLASH_MAN_INTEL:
127 printf ("INTEL ");
128 break;
129 default:
130 printf ("Unknown Vendor ");
131 break;
132 }
133
134 switch (info->flash_id & FLASH_TYPEMASK) {
135 case FLASH_28F128J3A:
136 printf ("28F128J3A\n");
137 break;
138 default:
139 printf ("Unknown Chip Type\n");
140 break;
141 }
142
143 printf (" Size: %ld MB in %d Sectors\n",
144 info->size >> 20, info->sector_count);
145
146 printf (" Sector Start Addresses:");
147 for (i = 0; i < info->sector_count; ++i) {
148 if ((i % 5) == 0)
149 printf ("\n ");
150 printf (" %08lX%s",
151 info->start[i],
152 info->protect[i] ? " (RO)" : " ");
153 }
154 printf ("\n");
155 return;
156}
157
158/*
159 * The following code cannot be run from FLASH!
160 */
161static ulong flash_get_size (FPW * addr, flash_info_t * info)
162{
163 volatile FPW value;
164
165 /* Write auto select command: read Manufacturer ID */
166 addr[0x5555] = (FPW) 0x00AA00AA;
167 addr[0x2AAA] = (FPW) 0x00550055;
168 addr[0x5555] = (FPW) 0x00900090;
169
170 mb ();
171 value = addr[0];
172
173 switch (value) {
174
175 case (FPW) INTEL_MANUFACT:
176 info->flash_id = FLASH_MAN_INTEL;
177 break;
178
179 default:
180 info->flash_id = FLASH_UNKNOWN;
181 info->sector_count = 0;
182 info->size = 0;
183 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
184 return (0); /* no or unknown flash */
185 }
186
187 mb ();
188 value = addr[1]; /* device ID */
189 switch (value) {
190
191 case (FPW) INTEL_ID_28F128J3A:
192 info->flash_id += FLASH_28F128J3A;
193 info->sector_count = 128;
194 info->size = 0x02000000;
195 break; /* => 16 MB */
196
197 default:
198 info->flash_id = FLASH_UNKNOWN;
199 break;
200 }
201
202 if (info->sector_count > CFG_MAX_FLASH_SECT) {
203 printf ("** ERROR: sector count %d > max (%d) **\n",
204 info->sector_count, CFG_MAX_FLASH_SECT);
205 info->sector_count = CFG_MAX_FLASH_SECT;
206 }
207
208 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
209
210 return (info->size);
211}
212
213
214/*-----------------------------------------------------------------------
215 */
216
217int flash_erase (flash_info_t * info, int s_first, int s_last)
218{
219 int flag, prot, sect;
220 ulong type, start, last;
221 int rcode = 0;
222
223 if ((s_first < 0) || (s_first > s_last)) {
224 if (info->flash_id == FLASH_UNKNOWN) {
225 printf ("- missing\n");
226 } else {
227 printf ("- no sectors to erase\n");
228 }
229 return 1;
230 }
231
232 type = (info->flash_id & FLASH_VENDMASK);
233 if ((type != FLASH_MAN_INTEL)) {
234 printf ("Can't erase unknown flash type %08lx - aborted\n",
235 info->flash_id);
236 return 1;
237 }
238
239 prot = 0;
240 for (sect = s_first; sect <= s_last; ++sect) {
241 if (info->protect[sect]) {
242 prot++;
243 }
244 }
245
246 if (prot) {
247 printf ("- Warning: %d protected sectors will not be erased!\n",
248 prot);
249 } else {
250 printf ("\n");
251 }
252
253 /*start = get_timer (0); */
254 last = start;
255
256 /* Disable interrupts which might cause a timeout here */
257 flag = disable_interrupts ();
258
259 /* Start erase on unprotected sectors */
260 for (sect = s_first; sect <= s_last; sect++) {
261 if (info->protect[sect] == 0) { /* not protected */
262 FPWV *addr = (FPWV *) (info->start[sect]);
263 FPW status;
264
265 printf ("Erasing sector %2d ... ", sect);
266
267 /* arm simple, non interrupt dependent timer */
268 reset_timer_masked ();
269
270 *addr = (FPW) 0x00500050; /* clear status register */
271 *addr = (FPW) 0x00200020; /* erase setup */
272 *addr = (FPW) 0x00D000D0; /* erase confirm */
273
274 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
275 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
276 printf ("Timeout\n");
277 *addr = (FPW) 0x00B000B0; /* suspend erase */
278 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
279 rcode = 1;
280 break;
281 }
282 }
283
284 *addr = (FPW) 0x00500050; /* clear status register cmd. */
285 *addr = (FPW) 0x00FF00FF; /* resest to read mode */
286
287 printf (" done\n");
288 }
289 }
290 return rcode;
291}
292
293/*-----------------------------------------------------------------------
294 * Copy memory to flash, returns:
295 * 0 - OK
296 * 1 - write timeout
297 * 2 - Flash not erased
298 * 4 - Flash not identified
299 */
300
301int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
302{
303 ulong cp, wp;
304 FPW data;
305 int count, i, l, rc, port_width;
306
307 if (info->flash_id == FLASH_UNKNOWN) {
308 return 4;
309 }
310/* get lower word aligned address */
311#ifdef FLASH_PORT_WIDTH16
312 wp = (addr & ~1);
313 port_width = 2;
314#else
315 wp = (addr & ~3);
316 port_width = 4;
317#endif
318
319 /*
320 * handle unaligned start bytes
321 */
322 if ((l = addr - wp) != 0) {
323 data = 0;
324 for (i = 0, cp = wp; i < l; ++i, ++cp) {
325 data = (data << 8) | (*(uchar *) cp);
326 }
327 for (; i < port_width && cnt > 0; ++i) {
328 data = (data << 8) | *src++;
329 --cnt;
330 ++cp;
331 }
332 for (; cnt == 0 && i < port_width; ++i, ++cp) {
333 data = (data << 8) | (*(uchar *) cp);
334 }
335
336 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
337 return (rc);
338 }
339 wp += port_width;
340 }
341
342 /*
343 * handle word aligned part
344 */
345 count = 0;
346 while (cnt >= port_width) {
347 data = 0;
348 for (i = 0; i < port_width; ++i) {
349 data = (data << 8) | *src++;
350 }
351 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
352 return (rc);
353 }
354 wp += port_width;
355 cnt -= port_width;
356 if (count++ > 0x800) {
357 spin_wheel ();
358 count = 0;
359 }
360 }
361
362 if (cnt == 0) {
363 return (0);
364 }
365
366 /*
367 * handle unaligned tail bytes
368 */
369 data = 0;
370 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
371 data = (data << 8) | *src++;
372 --cnt;
373 }
374 for (; i < port_width; ++i, ++cp) {
375 data = (data << 8) | (*(uchar *) cp);
376 }
377
378 return (write_data (info, wp, SWAP (data)));
379}
380
381/*-----------------------------------------------------------------------
382 * Write a word or halfword to Flash, returns:
383 * 0 - OK
384 * 1 - write timeout
385 * 2 - Flash not erased
386 */
387static int write_data (flash_info_t * info, ulong dest, FPW data)
388{
389 FPWV *addr = (FPWV *) dest;
390 ulong status;
391 int flag;
392
393 /* Check if Flash is (sufficiently) erased */
394 if ((*addr & data) != data) {
395 printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr);
396 return (2);
397 }
398 /* Disable interrupts which might cause a timeout here */
399 flag = disable_interrupts ();
400
401 *addr = (FPW) 0x00400040; /* write setup */
402 *addr = data;
403
404 /* arm simple, non interrupt dependent timer */
405 reset_timer_masked ();
406
407 /* wait while polling the status register */
408 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
409
410 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
411 *addr = (FPW) 0x00FF00FF; /* restore read mode */
412 return (1);
413 }
414 }
415
416 *addr = (FPW) 0x00FF00FF; /* restore read mode */
417
418 return (0);
419}
420
421void inline spin_wheel (void)
422{
423 static int p = 0;
424 static char w[] = "\\/-";
425
426 printf ("\010%c", w[p]);
427 (++p == 3) ? (p = 0) : 0;
428}