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wdenk4ec3a7f2004-09-28 16:44:41 +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
31flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
32
33/* Board support for 1 or 2 flash devices */
34#define FLASH_PORT_WIDTH32
35#undef 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 case 1:
75 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
76 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
77 break;
78 default:
79 panic ("configured too many flash banks!\n");
80 break;
81 }
82 size += flash_info[i].size;
83 }
84
85 /* Protect monitor and environment sectors
86 */
87 flash_protect ( FLAG_PROTECT_SET,
88 CFG_FLASH_BASE,
89 CFG_FLASH_BASE + monitor_flash_len - 1,
90 &flash_info[0] );
91
92 flash_protect ( FLAG_PROTECT_SET,
93 CFG_ENV_ADDR,
94 CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
95
96 return size;
97}
98
99/*-----------------------------------------------------------------------
100 */
101static void flash_get_offsets (ulong base, flash_info_t *info)
102{
103 int i;
104
105 if (info->flash_id == FLASH_UNKNOWN) {
106 return;
107 }
108
109 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
110 for (i = 0; i < info->sector_count; i++) {
111 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
112 info->protect[i] = 0;
113 }
114 }
115}
116
117/*-----------------------------------------------------------------------
118 */
119void flash_print_info (flash_info_t *info)
120{
121 int i;
122
123 if (info->flash_id == FLASH_UNKNOWN) {
124 printf ("missing or unknown FLASH type\n");
125 return;
126 }
127
128 switch (info->flash_id & FLASH_VENDMASK) {
129 case FLASH_MAN_INTEL:
130 printf ("INTEL ");
131 break;
132 default:
133 printf ("Unknown Vendor ");
134 break;
135 }
136
137 switch (info->flash_id & FLASH_TYPEMASK) {
138 case FLASH_28F128J3A:
139 printf ("28F128J3A\n");
140 break;
141 default:
142 printf ("Unknown Chip Type\n");
143 break;
144 }
145
146 printf (" Size: %ld MB in %d Sectors\n",
147 info->size >> 20, info->sector_count);
148
149 printf (" Sector Start Addresses:");
150 for (i = 0; i < info->sector_count; ++i) {
151 if ((i % 5) == 0)
152 printf ("\n ");
153 printf (" %08lX%s",
154 info->start[i],
155 info->protect[i] ? " (RO)" : " ");
156 }
157 printf ("\n");
158 return;
159}
160
161/*
162 * The following code cannot be run from FLASH!
163 */
164static ulong flash_get_size (FPW *addr, flash_info_t *info)
165{
166 volatile FPW value;
167
168 /* Write auto select command: read Manufacturer ID */
169 addr[0x5555] = (FPW) 0x00AA00AA;
170 addr[0x2AAA] = (FPW) 0x00550055;
171 addr[0x5555] = (FPW) 0x00900090;
172
173 mb ();
174 value = addr[0];
175
176 switch (value) {
177
178 case (FPW) INTEL_MANUFACT:
179 info->flash_id = FLASH_MAN_INTEL;
180 break;
181
182 default:
183 info->flash_id = FLASH_UNKNOWN;
184 info->sector_count = 0;
185 info->size = 0;
186 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
187 return (0); /* no or unknown flash */
188 }
189
190 mb ();
191 value = addr[1]; /* device ID */
192
193 switch (value) {
194
195 case (FPW) INTEL_ID_28F128J3A:
196 info->flash_id += FLASH_28F128J3A;
197 info->sector_count = 128;
198 info->size = 0x02000000;
199 break; /* => 16 MB */
200
201 default:
202 info->flash_id = FLASH_UNKNOWN;
203 break;
204 }
205
206 if (info->sector_count > CFG_MAX_FLASH_SECT) {
207 printf ("** ERROR: sector count %d > max (%d) **\n",
208 info->sector_count, CFG_MAX_FLASH_SECT);
209 info->sector_count = CFG_MAX_FLASH_SECT;
210 }
211
212 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
213
214 return (info->size);
215}
216
217
218/*-----------------------------------------------------------------------
219 */
220
221int flash_erase (flash_info_t *info, int s_first, int s_last)
222{
223 int flag, prot, sect;
224 ulong type, start, last;
225 int rcode = 0;
226
227 if ((s_first < 0) || (s_first > s_last)) {
228 if (info->flash_id == FLASH_UNKNOWN) {
229 printf ("- missing\n");
230 } else {
231 printf ("- no sectors to erase\n");
232 }
233 return 1;
234 }
235
236 type = (info->flash_id & FLASH_VENDMASK);
237 if ((type != FLASH_MAN_INTEL)) {
238 printf ("Can't erase unknown flash type %08lx - aborted\n",
239 info->flash_id);
240 return 1;
241 }
242
243 prot = 0;
244 for (sect = s_first; sect <= s_last; ++sect) {
245 if (info->protect[sect]) {
246 prot++;
247 }
248 }
249
250 if (prot) {
251 printf ("- Warning: %d protected sectors will not be erased!\n",
252 prot);
253 } else {
254 printf ("\n");
255 }
256
257 start = get_timer (0);
258 last = start;
259
260 /* Disable interrupts which might cause a timeout here */
261 flag = disable_interrupts ();
262
263 /* Start erase on unprotected sectors */
264 for (sect = s_first; sect <= s_last; sect++) {
265 if (info->protect[sect] == 0) { /* not protected */
266 FPWV *addr = (FPWV *) (info->start[sect]);
267 FPW status;
268
269 printf ("Erasing sector %2d ... ", sect);
270
271 /* arm simple, non interrupt dependent timer */
272 reset_timer_masked ();
273
274 *addr = (FPW) 0x00500050; /* clear status register */
275 *addr = (FPW) 0x00200020; /* erase setup */
276 *addr = (FPW) 0x00D000D0; /* erase confirm */
277
278 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
279 if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
280 printf ("Timeout\n");
281 *addr = (FPW) 0x00B000B0; /* suspend erase */
282 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
283 rcode = 1;
284 break;
285 }
286 }
287
288 *addr = 0x00500050; /* clear status register cmd. */
289 *addr = 0x00FF00FF; /* resest to read mode */
290
291 printf (" done\n");
292 }
293 }
294 return rcode;
295}
296
297/*-----------------------------------------------------------------------
298 * Copy memory to flash, returns:
299 * 0 - OK
300 * 1 - write timeout
301 * 2 - Flash not erased
302 * 4 - Flash not identified
303 */
304
305int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
306{
307 ulong cp, wp;
308 FPW data;
309 int count, i, l, rc, port_width;
310
311 if (info->flash_id == FLASH_UNKNOWN) {
312 return 4;
313 }
314/* get lower word aligned address */
315#ifdef FLASH_PORT_WIDTH16
316 wp = (addr & ~1);
317 port_width = 2;
318#else
319 wp = (addr & ~3);
320 port_width = 4;
321#endif
322
323 /*
324 * handle unaligned start bytes
325 */
326 if ((l = addr - wp) != 0) {
327 data = 0;
328 for (i = 0, cp = wp; i < l; ++i, ++cp) {
329 data = (data << 8) | (*(uchar *) cp);
330 }
331 for (; i < port_width && cnt > 0; ++i) {
332 data = (data << 8) | *src++;
333 --cnt;
334 ++cp;
335 }
336 for (; cnt == 0 && i < port_width; ++i, ++cp) {
337 data = (data << 8) | (*(uchar *) cp);
338 }
339
340 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
341 return (rc);
342 }
343 wp += port_width;
344 }
345
346 /*
347 * handle word aligned part
348 */
349 count = 0;
350 while (cnt >= port_width) {
351 data = 0;
352 for (i = 0; i < port_width; ++i) {
353 data = (data << 8) | *src++;
354 }
355 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
356 return (rc);
357 }
358 wp += port_width;
359 cnt -= port_width;
360 if (count++ > 0x800) {
361 spin_wheel ();
362 count = 0;
363 }
364 }
365
366 if (cnt == 0) {
367 return (0);
368 }
369
370 /*
371 * handle unaligned tail bytes
372 */
373 data = 0;
374 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
375 data = (data << 8) | *src++;
376 --cnt;
377 }
378 for (; i < port_width; ++i, ++cp) {
379 data = (data << 8) | (*(uchar *) cp);
380 }
381
382 return (write_data (info, wp, SWAP (data)));
383}
384
385/*-----------------------------------------------------------------------
386 * Write a word or halfword to Flash, returns:
387 * 0 - OK
388 * 1 - write timeout
389 * 2 - Flash not erased
390 */
391static int write_data (flash_info_t *info, ulong dest, FPW data)
392{
393 FPWV *addr = (FPWV *) dest;
394 ulong status;
395 int flag;
396
397 /* Check if Flash is (sufficiently) erased */
398 if ((*addr & data) != data) {
399 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
400 return (2);
401 }
402 /* Disable interrupts which might cause a timeout here */
403 flag = disable_interrupts ();
404
405 *addr = (FPW) 0x00400040; /* write setup */
406 *addr = data;
407
408 /* arm simple, non interrupt dependent timer */
409 reset_timer_masked ();
410
411 /* wait while polling the status register */
412 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
413 if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
414 *addr = (FPW) 0x00FF00FF; /* restore read mode */
415 return (1);
416 }
417 }
418
419 *addr = (FPW) 0x00FF00FF; /* restore read mode */
420
421 return (0);
422}
423
424void inline spin_wheel (void)
425{
426 static int p = 0;
427 static char w[] = "\\/-";
428
429 printf ("\010%c", w[p]);
430 (++p == 3) ? (p = 0) : 0;
431}