3
* Daniel Engstrļæ½m, Omicron Ceti AB, daniel@omicron.se
6
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7
* Alex Zuepke <azu@sysgo.de>
9
* See file CREDITS for list of people who contributed to this
12
* This program is free software; you can redistribute it and/or
13
* modify it under the terms of the GNU General Public License as
14
* published by the Free Software Foundation; either version 2 of
15
* the License, or (at your option) any later version.
17
* This program is distributed in the hope that it will be useful,
18
* but WITHOUT ANY WARRANTY; without even the implied warranty of
19
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20
* GNU General Public License for more details.
22
* You should have received a copy of the GNU General Public License
23
* along with this program; if not, write to the Free Software
24
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34
#define SC520_MAX_FLASH_BANKS 3
35
#define SC520_FLASH_BANK0_BASE 0x38000000 /* BOOTCS */
36
#define SC520_FLASH_BANK1_BASE 0x30000000 /* ROMCS0 */
37
#define SC520_FLASH_BANK2_BASE 0x28000000 /* ROMCS1 */
38
#define SC520_FLASH_BANKSIZE 0x8000000
40
#define AMD29LV016_SIZE 0x200000
41
#define AMD29LV016_SECTORS 32
43
flash_info_t flash_info[SC520_MAX_FLASH_BANKS];
45
#define CMD_READ_ARRAY 0x00F000F0
46
#define CMD_UNLOCK1 0x00AA00AA
47
#define CMD_UNLOCK2 0x00550055
48
#define CMD_ERASE_SETUP 0x00800080
49
#define CMD_ERASE_CONFIRM 0x00300030
50
#define CMD_PROGRAM 0x00A000A0
51
#define CMD_UNLOCK_BYPASS 0x00200020
54
#define BIT_ERASE_DONE 0x00800080
55
#define BIT_RDY_MASK 0x00800080
56
#define BIT_PROGRAM_ERROR 0x00200020
57
#define BIT_TIMEOUT 0x80000000 /* our flag */
63
/*-----------------------------------------------------------------------
66
ulong flash_init(void)
71
for (i = 0; i < SC520_MAX_FLASH_BANKS; i++) {
75
/* FixMe: this assumes that bank 0 and 2
76
* are mapped to the two 8Mb banks */
77
flash_info[i].flash_id =
78
(AMD_MANUFACT & FLASH_VENDMASK) |
79
(AMD_ID_LV016B & FLASH_TYPEMASK);
81
flash_info[i].size = AMD29LV016_SIZE*4;
82
flash_info[i].sector_count = AMD29LV016_SECTORS;
83
sectsize = (AMD29LV016_SIZE*4)/AMD29LV016_SECTORS;
85
/* FixMe: this assumes that bank1 is unmapped
86
* (or mapped to the same flash bank as BOOTCS) */
87
flash_info[i].flash_id = 0;
88
flash_info[i].size = 0;
89
flash_info[i].sector_count = 0;
92
memset(flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT);
95
flashbase = SC520_FLASH_BANK0_BASE;
98
flashbase = SC520_FLASH_BANK1_BASE;
101
flashbase = SC520_FLASH_BANK0_BASE;
104
panic("configured too many flash banks!\n");
107
for (j = 0; j < flash_info[i].sector_count; j++) {
108
flash_info[i].start[j] = sectsize;
109
flash_info[i].start[j] = flashbase + j * sectsize;
111
size += flash_info[i].size;
115
* Protect monitor and environment sectors
117
flash_protect(FLAG_PROTECT_SET,
118
i386boot_start-SC520_FLASH_BANK0_BASE,
119
i386boot_end-SC520_FLASH_BANK0_BASE,
122
#ifdef CONFIG_ENV_ADDR
123
flash_protect(FLAG_PROTECT_SET,
125
CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
131
/*-----------------------------------------------------------------------
133
void flash_print_info(flash_info_t *info)
137
switch (info->flash_id & FLASH_VENDMASK) {
138
case (AMD_MANUFACT & FLASH_VENDMASK):
142
printf("Unknown Vendor ");
146
switch (info->flash_id & FLASH_TYPEMASK) {
147
case (AMD_ID_LV016B & FLASH_TYPEMASK):
148
printf("4x Amd29LV016B (16Mbit)\n");
151
printf("Unknown Chip Type\n");
156
printf(" Size: %ld MB in %d Sectors\n",
157
info->size >> 20, info->sector_count);
159
printf(" Sector Start Addresses:");
160
for (i = 0; i < info->sector_count; i++) {
164
printf (" %08lX%s", info->start[i],
165
info->protect[i] ? " (RO)" : " ");
172
/*-----------------------------------------------------------------------
175
int flash_erase(flash_info_t *info, int s_first, int s_last)
178
int iflag, prot, sect;
182
/* first look for protection bits */
184
if (info->flash_id == FLASH_UNKNOWN) {
185
return ERR_UNKNOWN_FLASH_TYPE;
188
if ((s_first < 0) || (s_first > s_last)) {
192
if ((info->flash_id & FLASH_VENDMASK) !=
193
(AMD_MANUFACT & FLASH_VENDMASK)) {
194
return ERR_UNKNOWN_FLASH_VENDOR;
198
for (sect=s_first; sect<=s_last; ++sect) {
199
if (info->protect[sect]) {
204
return ERR_PROTECTED;
208
* Disable interrupts which might cause a timeout
209
* here. Remember that our exception vectors are
210
* at address 0 in the flash, and we don't want a
211
* (ticker) exception to happen while the flash
212
* chip is in programming mode.
214
iflag = disable_interrupts();
216
/* Start erase on unprotected sectors */
217
for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {
218
printf("Erasing sector %2d ... ", sect);
220
/* arm simple, non interrupt dependent timer */
223
if (info->protect[sect] == 0) {
225
ulong addr = info->start[sect];
227
writel(CMD_UNLOCK1, addr + 1);
228
writel(CMD_UNLOCK2, addr + 2);
229
writel(CMD_ERASE_SETUP, addr + 1);
231
writel(CMD_UNLOCK1, addr + 1);
232
writel(CMD_UNLOCK2, addr + 2);
233
writel(CMD_ERASE_CONFIRM, addr);
236
/* wait until flash is ready */
240
result = readl(addr);
243
if (get_timer(0) > CONFIG_SYS_FLASH_ERASE_TOUT) {
244
writel(CMD_READ_ARRAY, addr + 1);
249
if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE) {
253
if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR) {
257
if (!chip2 && (result >> 16) & BIT_ERASE_DONE) {
261
if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR) {
265
} while (!chip1 || !chip2);
267
writel(CMD_READ_ARRAY, addr + 1);
269
if (chip1 == ERR || chip2 == ERR) {
280
} else { /* it was protected */
282
printf("protected!\n");
287
printf("User Interrupt!\n");
291
/* allow flash to settle - wait 10 ms */
301
/*-----------------------------------------------------------------------
302
* Copy memory to flash
305
volatile static int write_word(flash_info_t *info, ulong dest, ulong data)
314
* Check if Flash is (sufficiently) erased
316
result = readl(addr);
317
if ((result & data) != data) {
318
return ERR_NOT_ERASED;
322
* Disable interrupts which might cause a timeout
323
* here. Remember that our exception vectors are
324
* at address 0 in the flash, and we don't want a
325
* (ticker) exception to happen while the flash
326
* chip is in programming mode.
328
iflag = disable_interrupts();
330
writel(CMD_UNLOCK1, addr + 1);
331
writel(CMD_UNLOCK2, addr + 2);
332
writel(CMD_UNLOCK_BYPASS, addr + 1);
333
writel(addr, CMD_PROGRAM);
336
/* arm simple, non interrupt dependent timer */
339
/* wait until flash is ready */
342
result = readl(addr);
345
if (get_timer(0) > CONFIG_SYS_FLASH_ERASE_TOUT) {
350
if (!chip1 && ((result & 0x80) == (data & 0x80))) {
354
if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
355
result = readl(addr);
357
if ((result & 0x80) == (data & 0x80)) {
364
if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16)))) {
368
if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR)) {
369
result = readl(addr);
371
if ((result & (0x80 << 16)) == (data & (0x80 << 16))) {
378
} while (!chip1 || !chip2);
380
writel(CMD_READ_ARRAY, addr);
382
if (chip1 == ERR || chip2 == ERR || readl(addr) != data) {
393
/*-----------------------------------------------------------------------
394
* Copy memory to flash.
397
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
403
wp = (addr & ~3); /* get lower word aligned address */
406
* handle unaligned start bytes
408
if ((l = addr - wp) != 0) {
410
for (i=0, cp=wp; i<l; ++i, ++cp) {
411
data = (data >> 8) | (*(uchar *)cp << 24);
413
for (; i<4 && cnt>0; ++i) {
414
data = (data >> 8) | (*src++ << 24);
418
for (; cnt==0 && i<4; ++i, ++cp) {
419
data = (data >> 8) | (*(uchar *)cp << 24);
422
if ((rc = write_word(info, wp, data)) != 0) {
429
* handle word aligned part
432
data = *((vu_long*)src);
433
if ((rc = write_word(info, wp, data)) != 0) {
446
* handle unaligned tail bytes
449
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
450
data = (data >> 8) | (*src++ << 24);
453
for (; i<4; ++i, ++cp) {
454
data = (data >> 8) | (*(uchar *)cp << 24);
457
return write_word(info, wp, data);