3
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5
* See file CREDITS for list of people who contributed to this
8
* This program is free software; you can redistribute it and/or
9
* modify it under the terms of the GNU General Public License as
10
* published by the Free Software Foundation; either version 2 of
11
* the License, or (at your option) any later version.
13
* This program is distributed in the hope that it will be useful,
14
* but WITHOUT ANY WARRANTY; without even the implied warranty of
15
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
* GNU General Public License for more details.
18
* You should have received a copy of the GNU General Public License
19
* along with this program; if not, write to the Free Software
20
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
29
/*-----------------------------------------------------------------------
32
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
33
static int write_word (flash_info_t *info, ulong dest, ulong data);
34
static void flash_get_offsets (ulong base, flash_info_t *info);
36
/*-----------------------------------------------------------------------
39
unsigned long flash_init (void)
41
unsigned long size_b0, size_b1;
44
/* Init: no FLASHes known */
45
for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i)
46
flash_info[i].flash_id = FLASH_UNKNOWN;
49
size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
52
flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
54
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
55
/* Monitor protection ON by default */
56
flash_protect(FLAG_PROTECT_SET,
57
CONFIG_SYS_MONITOR_BASE,
58
CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
64
flash_info[1].flash_id = FLASH_UNKNOWN;
65
flash_info[1].sector_count = -1;
67
flash_info[0].size = size_b0;
68
flash_info[1].size = size_b1;
70
return (size_b0 + size_b1);
73
/*-----------------------------------------------------------------------
74
* Fix this to support variable sector sizes
76
static void flash_get_offsets (ulong base, flash_info_t *info)
80
/* set up sector start address table */
81
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
82
/* set sector offsets for bottom boot block type */
83
for (i = 0; i < info->sector_count; i++)
84
info->start[i] = base + (i * 0x00010000);
88
/*-----------------------------------------------------------------------
90
void flash_print_info (flash_info_t *info)
94
if (info->flash_id == FLASH_UNKNOWN)
96
puts ("missing or unknown FLASH type\n");
100
switch (info->flash_id & FLASH_VENDMASK)
102
case FLASH_MAN_AMD: printf ("AMD "); break;
103
case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
104
case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break;
105
default: printf ("Unknown Vendor "); break;
108
switch (info->flash_id & FLASH_TYPEMASK)
110
case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n");
112
case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
114
case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
116
case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
118
case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
120
case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
122
case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
124
case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
126
case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
128
default: printf ("Unknown Chip Type\n");
132
if (info->size >> 20) {
133
printf (" Size: %ld MB in %d Sectors\n",
137
printf (" Size: %ld KB in %d Sectors\n",
142
puts (" Sector Start Addresses:");
144
for (i=0; i<info->sector_count; ++i)
153
info->protect[i] ? " (RO)" : " ");
159
/*-----------------------------------------------------------------------
163
* The following code cannot be run from FLASH!
166
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
169
volatile unsigned char *caddr;
172
caddr = (volatile unsigned char *)addr ;
174
/* Write auto select command: read Manufacturer ID */
177
printf("Base address is: %08x\n", caddr);
180
caddr[0x0555] = 0xAA;
181
caddr[0x02AA] = 0x55;
182
caddr[0x0555] = 0x90;
187
printf("Manufact ID: %02x\n", value);
191
case 0x01: /*AMD_MANUFACT*/
192
info->flash_id = FLASH_MAN_AMD;
195
case 0x04: /*FUJ_MANUFACT*/
196
info->flash_id = FLASH_MAN_FUJ;
200
info->flash_id = FLASH_UNKNOWN;
201
info->sector_count = 0;
206
value = caddr[1]; /* device ID */
208
printf("Device ID: %02x\n", value);
213
info->flash_id += FLASH_AM040;
214
info->sector_count = 8;
215
info->size = 0x00080000;
216
break; /* => 512Kb */
219
info->flash_id = FLASH_UNKNOWN;
220
return (0); /* => no or unknown flash */
224
flash_get_offsets ((ulong)addr, &flash_info[0]);
226
/* check for protected sectors */
227
for (i = 0; i < info->sector_count; i++)
229
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
230
/* D0 = 1 if protected */
231
caddr = (volatile unsigned char *)(info->start[i]);
232
info->protect[i] = caddr[2] & 1;
236
* Prevent writes to uninitialized FLASH.
238
if (info->flash_id != FLASH_UNKNOWN)
240
caddr = (volatile unsigned char *)info->start[0];
241
*caddr = 0xF0; /* reset bank */
248
/*-----------------------------------------------------------------------
251
int flash_erase (flash_info_t *info, int s_first, int s_last)
253
volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
254
int flag, prot, sect, l_sect;
255
ulong start, now, last;
257
if ((s_first < 0) || (s_first > s_last)) {
258
if (info->flash_id == FLASH_UNKNOWN) {
259
printf ("- missing\n");
261
printf ("- no sectors to erase\n");
266
if ((info->flash_id == FLASH_UNKNOWN) ||
267
(info->flash_id > FLASH_AMD_COMP)) {
268
printf ("Can't erase unknown flash type - aborted\n");
273
for (sect=s_first; sect<=s_last; ++sect) {
274
if (info->protect[sect]) {
280
printf ("- Warning: %d protected sectors will not be erased!\n",
288
/* Disable interrupts which might cause a timeout here */
289
flag = disable_interrupts();
297
/* Start erase on unprotected sectors */
298
for (sect = s_first; sect<=s_last; sect++) {
299
if (info->protect[sect] == 0) { /* not protected */
300
addr = (volatile unsigned char *)(info->start[sect]);
306
/* re-enable interrupts if necessary */
310
/* wait at least 80us - let's wait 1 ms */
314
* We wait for the last triggered sector
319
start = get_timer (0);
321
addr = (volatile unsigned char *)(info->start[l_sect]);
323
while ((addr[0] & 0xFF) != 0xFF)
325
if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
326
printf ("Timeout\n");
329
/* show that we're waiting */
330
if ((now - last) > 1000) { /* every second */
337
/* reset to read mode */
338
addr = (volatile unsigned char *)info->start[0];
340
addr[0] = 0xF0; /* reset bank */
346
/*-----------------------------------------------------------------------
347
* Copy memory to flash, returns:
350
* 2 - Flash not erased
353
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
358
wp = (addr & ~3); /* get lower word aligned address */
361
* handle unaligned start bytes
363
if ((l = addr - wp) != 0) {
365
for (i=0, cp=wp; i<l; ++i, ++cp) {
366
data = (data << 8) | (*(uchar *)cp);
368
for (; i<4 && cnt>0; ++i) {
369
data = (data << 8) | *src++;
373
for (; cnt==0 && i<4; ++i, ++cp) {
374
data = (data << 8) | (*(uchar *)cp);
377
if ((rc = write_word(info, wp, data)) != 0) {
384
* handle word aligned part
388
for (i=0; i<4; ++i) {
389
data = (data << 8) | *src++;
391
if ((rc = write_word(info, wp, data)) != 0) {
403
* handle unaligned tail bytes
406
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
407
data = (data << 8) | *src++;
410
for (; i<4; ++i, ++cp) {
411
data = (data << 8) | (*(uchar *)cp);
414
return (write_word(info, wp, data));
417
/*-----------------------------------------------------------------------
418
* Write a word to Flash, returns:
421
* 2 - Flash not erased
423
static int write_word (flash_info_t *info, ulong dest, ulong data)
425
volatile unsigned char *addr = (volatile unsigned char*)(info->start[0]),
428
int flag, count = 4 ;
430
cdest = (volatile unsigned char *)dest ;
431
cdata = (volatile unsigned char *)&data ;
433
/* Check if Flash is (sufficiently) erased */
434
if ((*((vu_long *)dest) & data) != data) {
440
/* Disable interrupts which might cause a timeout here */
441
flag = disable_interrupts();
449
/* re-enable interrupts if necessary */
453
/* data polling for D7 */
454
start = get_timer (0);
455
while ((*cdest ^ *cdata) & 0x80)
457
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
468
/*-----------------------------------------------------------------------