blob: 5ba84c68ece9abf19b10d8ee79f1a258d899c817 [file] [log] [blame]
Markus Klotzbücheraf646e82006-02-07 20:48:45 +01001/*
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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020031flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
Markus Klotzbücheraf646e82006-02-07 20:48:45 +010032
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{
Markus Klotzbücherb3c36e62006-02-09 13:19:25 +010065#if 0
Markus Klotzbücheraf646e82006-02-07 20:48:45 +010066 int i;
67 ulong size = 0;
68
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020069 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
Markus Klotzbücheraf646e82006-02-07 20:48:45 +010070 switch (i) {
71 case 0:
72 flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
73 flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
74 break;
75 case 1:
76 flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
77 flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
78 break;
79 default:
80 panic ("configured too many flash banks!\n");
81 break;
82 }
83 size += flash_info[i].size;
84 }
85
86 /* Protect monitor and environment sectors
87 */
88 flash_protect ( FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020089 CONFIG_SYS_FLASH_BASE,
90 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
Markus Klotzbücheraf646e82006-02-07 20:48:45 +010091 &flash_info[0] );
92
93 flash_protect ( FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020094 CONFIG_ENV_ADDR,
95 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
Markus Klotzbücheraf646e82006-02-07 20:48:45 +010096
97 return size;
Markus Klotzbücherb3c36e62006-02-09 13:19:25 +010098#endif
99 return 0;
Markus Klotzbücheraf646e82006-02-07 20:48:45 +0100100}
101
102/*-----------------------------------------------------------------------
103 */
104static void flash_get_offsets (ulong base, flash_info_t *info)
105{
106 int i;
107
108 if (info->flash_id == FLASH_UNKNOWN) {
109 return;
110 }
111
112 if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
113 for (i = 0; i < info->sector_count; i++) {
114 info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
115 info->protect[i] = 0;
116 }
117 }
118}
119
120/*-----------------------------------------------------------------------
121 */
122void flash_print_info (flash_info_t *info)
123{
124 int i;
125
126 if (info->flash_id == FLASH_UNKNOWN) {
127 printf ("missing or unknown FLASH type\n");
128 return;
129 }
130
131 switch (info->flash_id & FLASH_VENDMASK) {
132 case FLASH_MAN_INTEL:
133 printf ("INTEL ");
134 break;
135 default:
136 printf ("Unknown Vendor ");
137 break;
138 }
139
140 switch (info->flash_id & FLASH_TYPEMASK) {
141 case FLASH_28F128J3A:
142 printf ("28F128J3A\n");
143 break;
144 default:
145 printf ("Unknown Chip Type\n");
146 break;
147 }
148
149 printf (" Size: %ld MB in %d Sectors\n",
150 info->size >> 20, info->sector_count);
151
152 printf (" Sector Start Addresses:");
153 for (i = 0; i < info->sector_count; ++i) {
154 if ((i % 5) == 0)
155 printf ("\n ");
156 printf (" %08lX%s",
157 info->start[i],
158 info->protect[i] ? " (RO)" : " ");
159 }
160 printf ("\n");
161 return;
162}
163
164/*
165 * The following code cannot be run from FLASH!
166 */
167static ulong flash_get_size (FPW *addr, flash_info_t *info)
168{
169 volatile FPW value;
170
171 /* Write auto select command: read Manufacturer ID */
172 addr[0x5555] = (FPW) 0x00AA00AA;
173 addr[0x2AAA] = (FPW) 0x00550055;
174 addr[0x5555] = (FPW) 0x00900090;
175
176 mb ();
177 value = addr[0];
178
179 switch (value) {
180
181 case (FPW) INTEL_MANUFACT:
182 info->flash_id = FLASH_MAN_INTEL;
183 break;
184
185 default:
186 info->flash_id = FLASH_UNKNOWN;
187 info->sector_count = 0;
188 info->size = 0;
189 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
190 return (0); /* no or unknown flash */
191 }
192
193 mb ();
194 value = addr[1]; /* device ID */
195
196 switch (value) {
197
198 case (FPW) INTEL_ID_28F128J3A:
199 info->flash_id += FLASH_28F128J3A;
200 info->sector_count = 128;
201 info->size = 0x02000000;
202 break; /* => 16 MB */
203
204 default:
205 info->flash_id = FLASH_UNKNOWN;
206 break;
207 }
208
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200209 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
Markus Klotzbücheraf646e82006-02-07 20:48:45 +0100210 printf ("** ERROR: sector count %d > max (%d) **\n",
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200211 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
212 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
Markus Klotzbücheraf646e82006-02-07 20:48:45 +0100213 }
214
215 addr[0] = (FPW) 0x00FF00FF; /* restore read mode */
216
217 return (info->size);
218}
219
220
221/*-----------------------------------------------------------------------
222 */
223
224int flash_erase (flash_info_t *info, int s_first, int s_last)
225{
226 int flag, prot, sect;
227 ulong type, start, last;
228 int rcode = 0;
229
230 if ((s_first < 0) || (s_first > s_last)) {
231 if (info->flash_id == FLASH_UNKNOWN) {
232 printf ("- missing\n");
233 } else {
234 printf ("- no sectors to erase\n");
235 }
236 return 1;
237 }
238
239 type = (info->flash_id & FLASH_VENDMASK);
240 if ((type != FLASH_MAN_INTEL)) {
241 printf ("Can't erase unknown flash type %08lx - aborted\n",
242 info->flash_id);
243 return 1;
244 }
245
246 prot = 0;
247 for (sect = s_first; sect <= s_last; ++sect) {
248 if (info->protect[sect]) {
249 prot++;
250 }
251 }
252
253 if (prot) {
254 printf ("- Warning: %d protected sectors will not be erased!\n",
255 prot);
256 } else {
257 printf ("\n");
258 }
259
260 start = get_timer (0);
261 last = start;
262
263 /* Disable interrupts which might cause a timeout here */
264 flag = disable_interrupts ();
265
266 /* Start erase on unprotected sectors */
267 for (sect = s_first; sect <= s_last; sect++) {
268 if (info->protect[sect] == 0) { /* not protected */
269 FPWV *addr = (FPWV *) (info->start[sect]);
270 FPW status;
271
272 printf ("Erasing sector %2d ... ", sect);
273
274 /* arm simple, non interrupt dependent timer */
275 reset_timer_masked ();
276
277 *addr = (FPW) 0x00500050; /* clear status register */
278 *addr = (FPW) 0x00200020; /* erase setup */
279 *addr = (FPW) 0x00D000D0; /* erase confirm */
280
281 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200282 if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
Markus Klotzbücheraf646e82006-02-07 20:48:45 +0100283 printf ("Timeout\n");
284 *addr = (FPW) 0x00B000B0; /* suspend erase */
285 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
286 rcode = 1;
287 break;
288 }
289 }
290
291 *addr = 0x00500050; /* clear status register cmd. */
292 *addr = 0x00FF00FF; /* resest to read mode */
293
294 printf (" done\n");
295 }
296 }
297 return rcode;
298}
299
300/*-----------------------------------------------------------------------
301 * Copy memory to flash, returns:
302 * 0 - OK
303 * 1 - write timeout
304 * 2 - Flash not erased
305 * 4 - Flash not identified
306 */
307
308int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
309{
310 ulong cp, wp;
311 FPW data;
312 int count, i, l, rc, port_width;
313
314 if (info->flash_id == FLASH_UNKNOWN) {
315 return 4;
316 }
317/* get lower word aligned address */
318#ifdef FLASH_PORT_WIDTH16
319 wp = (addr & ~1);
320 port_width = 2;
321#else
322 wp = (addr & ~3);
323 port_width = 4;
324#endif
325
326 /*
327 * handle unaligned start bytes
328 */
329 if ((l = addr - wp) != 0) {
330 data = 0;
331 for (i = 0, cp = wp; i < l; ++i, ++cp) {
332 data = (data << 8) | (*(uchar *) cp);
333 }
334 for (; i < port_width && cnt > 0; ++i) {
335 data = (data << 8) | *src++;
336 --cnt;
337 ++cp;
338 }
339 for (; cnt == 0 && i < port_width; ++i, ++cp) {
340 data = (data << 8) | (*(uchar *) cp);
341 }
342
343 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
344 return (rc);
345 }
346 wp += port_width;
347 }
348
349 /*
350 * handle word aligned part
351 */
352 count = 0;
353 while (cnt >= port_width) {
354 data = 0;
355 for (i = 0; i < port_width; ++i) {
356 data = (data << 8) | *src++;
357 }
358 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
359 return (rc);
360 }
361 wp += port_width;
362 cnt -= port_width;
363 if (count++ > 0x800) {
364 spin_wheel ();
365 count = 0;
366 }
367 }
368
369 if (cnt == 0) {
370 return (0);
371 }
372
373 /*
374 * handle unaligned tail bytes
375 */
376 data = 0;
377 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
378 data = (data << 8) | *src++;
379 --cnt;
380 }
381 for (; i < port_width; ++i, ++cp) {
382 data = (data << 8) | (*(uchar *) cp);
383 }
384
385 return (write_data (info, wp, SWAP (data)));
386}
387
388/*-----------------------------------------------------------------------
389 * Write a word or halfword to Flash, returns:
390 * 0 - OK
391 * 1 - write timeout
392 * 2 - Flash not erased
393 */
394static int write_data (flash_info_t *info, ulong dest, FPW data)
395{
396 FPWV *addr = (FPWV *) dest;
397 ulong status;
398 int flag;
399
400 /* Check if Flash is (sufficiently) erased */
401 if ((*addr & data) != data) {
402 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
403 return (2);
404 }
405 /* Disable interrupts which might cause a timeout here */
406 flag = disable_interrupts ();
407
408 *addr = (FPW) 0x00400040; /* write setup */
409 *addr = data;
410
411 /* arm simple, non interrupt dependent timer */
412 reset_timer_masked ();
413
414 /* wait while polling the status register */
415 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200416 if (get_timer_masked () > CONFIG_SYS_FLASH_WRITE_TOUT) {
Markus Klotzbücheraf646e82006-02-07 20:48:45 +0100417 *addr = (FPW) 0x00FF00FF; /* restore read mode */
418 return (1);
419 }
420 }
421
422 *addr = (FPW) 0x00FF00FF; /* restore read mode */
423
424 return (0);
425}
426
427void inline spin_wheel (void)
428{
429 static int p = 0;
430 static char w[] = "\\/-";
431
432 printf ("\010%c", w[p]);
433 (++p == 3) ? (p = 0) : 0;
434}