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wdenkfabd46a2004-07-10 23:11:10 +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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020031flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
wdenkfabd46a2004-07-10 23:11:10 +000032
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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020068 for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
wdenkfabd46a2004-07-10 23:11:10 +000069 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,
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020088 CONFIG_SYS_FLASH_BASE,
89 CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1,
wdenkfabd46a2004-07-10 23:11:10 +000090 &flash_info[0] );
91
92 flash_protect ( FLAG_PROTECT_SET,
Jean-Christophe PLAGNIOL-VILLARD0e8d1582008-09-10 22:48:06 +020093 CONFIG_ENV_ADDR,
94 CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0] );
wdenkfabd46a2004-07-10 23:11:10 +000095
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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200206 if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
wdenkfabd46a2004-07-10 23:11:10 +0000207 printf ("** ERROR: sector count %d > max (%d) **\n",
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200208 info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
209 info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
wdenkfabd46a2004-07-10 23:11:10 +0000210 }
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;
Graeme Russa60d1e52011-07-15 23:31:37 +0000224 ulong type, start;
wdenkfabd46a2004-07-10 23:11:10 +0000225 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
wdenkfabd46a2004-07-10 23:11:10 +0000257 /* Disable interrupts which might cause a timeout here */
258 flag = disable_interrupts ();
259
260 /* Start erase on unprotected sectors */
261 for (sect = s_first; sect <= s_last; sect++) {
262 if (info->protect[sect] == 0) { /* not protected */
263 FPWV *addr = (FPWV *) (info->start[sect]);
264 FPW status;
265
266 printf ("Erasing sector %2d ... ", sect);
267
268 /* arm simple, non interrupt dependent timer */
Graeme Russa60d1e52011-07-15 23:31:37 +0000269 start = get_timer(0);
wdenkfabd46a2004-07-10 23:11:10 +0000270
271 *addr = (FPW) 0x00500050; /* clear status register */
272 *addr = (FPW) 0x00200020; /* erase setup */
273 *addr = (FPW) 0x00D000D0; /* erase confirm */
274
275 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
Graeme Russa60d1e52011-07-15 23:31:37 +0000276 if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
wdenkfabd46a2004-07-10 23:11:10 +0000277 printf ("Timeout\n");
278 *addr = (FPW) 0x00B000B0; /* suspend erase */
279 *addr = (FPW) 0x00FF00FF; /* reset to read mode */
280 rcode = 1;
281 break;
282 }
283 }
284
285 *addr = 0x00500050; /* clear status register cmd. */
286 *addr = 0x00FF00FF; /* resest to read mode */
287
288 printf (" done\n");
289 }
290 }
291 return rcode;
292}
293
294/*-----------------------------------------------------------------------
295 * Copy memory to flash, returns:
296 * 0 - OK
297 * 1 - write timeout
298 * 2 - Flash not erased
299 * 4 - Flash not identified
300 */
301
302int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
303{
304 ulong cp, wp;
305 FPW data;
306 int count, i, l, rc, port_width;
307
308 if (info->flash_id == FLASH_UNKNOWN) {
309 return 4;
310 }
311/* get lower word aligned address */
312#ifdef FLASH_PORT_WIDTH16
313 wp = (addr & ~1);
314 port_width = 2;
315#else
316 wp = (addr & ~3);
317 port_width = 4;
318#endif
319
320 /*
321 * handle unaligned start bytes
322 */
323 if ((l = addr - wp) != 0) {
324 data = 0;
325 for (i = 0, cp = wp; i < l; ++i, ++cp) {
326 data = (data << 8) | (*(uchar *) cp);
327 }
328 for (; i < port_width && cnt > 0; ++i) {
329 data = (data << 8) | *src++;
330 --cnt;
331 ++cp;
332 }
333 for (; cnt == 0 && i < port_width; ++i, ++cp) {
334 data = (data << 8) | (*(uchar *) cp);
335 }
336
337 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
338 return (rc);
339 }
340 wp += port_width;
341 }
342
343 /*
344 * handle word aligned part
345 */
346 count = 0;
347 while (cnt >= port_width) {
348 data = 0;
349 for (i = 0; i < port_width; ++i) {
350 data = (data << 8) | *src++;
351 }
352 if ((rc = write_data (info, wp, SWAP (data))) != 0) {
353 return (rc);
354 }
355 wp += port_width;
356 cnt -= port_width;
357 if (count++ > 0x800) {
358 spin_wheel ();
359 count = 0;
360 }
361 }
362
363 if (cnt == 0) {
364 return (0);
365 }
366
367 /*
368 * handle unaligned tail bytes
369 */
370 data = 0;
371 for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
372 data = (data << 8) | *src++;
373 --cnt;
374 }
375 for (; i < port_width; ++i, ++cp) {
376 data = (data << 8) | (*(uchar *) cp);
377 }
378
379 return (write_data (info, wp, SWAP (data)));
380}
381
382/*-----------------------------------------------------------------------
383 * Write a word or halfword to Flash, returns:
384 * 0 - OK
385 * 1 - write timeout
386 * 2 - Flash not erased
387 */
388static int write_data (flash_info_t *info, ulong dest, FPW data)
389{
390 FPWV *addr = (FPWV *) dest;
391 ulong status;
392 int flag;
Graeme Russa60d1e52011-07-15 23:31:37 +0000393 ulong start;
wdenkfabd46a2004-07-10 23:11:10 +0000394
395 /* Check if Flash is (sufficiently) erased */
396 if ((*addr & data) != data) {
397 printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
398 return (2);
399 }
400 /* Disable interrupts which might cause a timeout here */
401 flag = disable_interrupts ();
402
403 *addr = (FPW) 0x00400040; /* write setup */
404 *addr = data;
405
406 /* arm simple, non interrupt dependent timer */
Graeme Russa60d1e52011-07-15 23:31:37 +0000407 start = get_timer(0);
wdenkfabd46a2004-07-10 23:11:10 +0000408
409 /* wait while polling the status register */
410 while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
Graeme Russa60d1e52011-07-15 23:31:37 +0000411 if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
wdenkfabd46a2004-07-10 23:11:10 +0000412 *addr = (FPW) 0x00FF00FF; /* restore read mode */
413 return (1);
414 }
415 }
416
417 *addr = (FPW) 0x00FF00FF; /* restore read mode */
418
419 return (0);
420}
421
422void inline spin_wheel (void)
423{
424 static int p = 0;
425 static char w[] = "\\/-";
426
427 printf ("\010%c", w[p]);
428 (++p == 3) ? (p = 0) : 0;
429}