3
* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
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,
25
* flash.c - flash support for the 512k, 8bit boot flash
26
and the 8MB 32bit extra flash on the DB64360
27
* most of this file was based on the existing U-Boot
30
* written or collected and sometimes rewritten by
31
* Ingo Assmus <ingo.assmus@keymile.com>
37
#include "../include/mv_gen_reg.h"
38
#include "../include/memory.h"
39
#include "intel_flash.h"
41
#define FLASH_ROM 0xFFFD /* unknown flash type */
42
#define FLASH_RAM 0xFFFE /* unknown flash type */
43
#define FLASH_MAN_UNKNOWN 0xFFFF0000
47
/* Intel flash commands */
48
int flash_erase_intel (flash_info_t * info, int s_first, int s_last);
49
int write_word_intel (bank_addr_t addr, bank_word_t value);
51
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
53
/*-----------------------------------------------------------------------
56
static ulong flash_get_size (int portwidth, vu_long * addr,
58
static int write_word (flash_info_t * info, ulong dest, ulong data);
59
static void flash_get_offsets (ulong base, flash_info_t * info);
61
/*-----------------------------------------------------------------------
64
unsigned long flash_init (void)
67
unsigned long size_b0 = 0, size_b1 = 0;
68
unsigned long base, flash_size;
70
/* Init: no FLASHes known */
71
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
72
flash_info[i].flash_id = FLASH_UNKNOWN;
76
base = CONFIG_SYS_FLASH_BASE;
78
flash_get_size (CONFIG_SYS_BOOT_FLASH_WIDTH, (vu_long *) base,
81
printf ("[%ldkB@%lx] ", size_b0 / 1024, base);
83
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
84
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20);
87
base = memoryGetDeviceBaseAddress (CONFIG_SYS_EXTRA_FLASH_DEVICE);
88
/* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/
89
for (i = 1; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
91
flash_get_size (CONFIG_SYS_EXTRA_FLASH_WIDTH,
92
(vu_long *) base, &flash_info[i]);
94
printf ("[%ldMB@%lx] ", size >> 20, base);
96
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
98
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20);
106
flash_size = size_b0 + size_b1;
110
/*-----------------------------------------------------------------------
112
static void flash_get_offsets (ulong base, flash_info_t * info)
117
if (!info->sector_count)
120
/* set up sector start address table */
121
switch (info->flash_id & FLASH_TYPEMASK) {
123
case FLASH_28F128J3A:
124
case FLASH_28F640J3A:
126
/* this chip has uniformly spaced sectors */
127
sector_size = info->size / info->sector_count;
128
for (i = 0; i < info->sector_count; i++)
129
info->start[i] = base + (i * sector_size);
132
if (info->flash_id & FLASH_BTYPE) {
133
/* set sector offsets for bottom boot block type */
134
info->start[0] = base + 0x00000000;
135
info->start[1] = base + 0x00008000;
136
info->start[2] = base + 0x0000C000;
137
info->start[3] = base + 0x00010000;
138
for (i = 4; i < info->sector_count; i++) {
140
base + (i * 0x00020000) - 0x00060000;
143
/* set sector offsets for top boot block type */
144
i = info->sector_count - 1;
145
info->start[i--] = base + info->size - 0x00008000;
146
info->start[i--] = base + info->size - 0x0000C000;
147
info->start[i--] = base + info->size - 0x00010000;
148
for (; i >= 0; i--) {
149
info->start[i] = base + i * 0x00020000;
155
/*-----------------------------------------------------------------------
157
void flash_print_info (flash_info_t * info)
161
if (info->flash_id == FLASH_UNKNOWN) {
162
printf ("missing or unknown FLASH type\n");
166
switch (info->flash_id & FLASH_VENDMASK) {
176
case FLASH_MAN_INTEL:
180
printf ("Unknown Vendor ");
184
switch (info->flash_id & FLASH_TYPEMASK) {
186
printf ("AM29LV040B (4 Mbit, bottom boot sect)\n");
189
printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
192
printf ("AM29LV400T (4 Mbit, top boot sector)\n");
195
printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
198
printf ("AM29LV800T (8 Mbit, top boot sector)\n");
201
printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
204
printf ("AM29LV160T (16 Mbit, top boot sector)\n");
207
printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
210
printf ("AM29LV320T (32 Mbit, top boot sector)\n");
212
case FLASH_28F640J3A:
213
printf ("28F640J3A (64 Mbit)\n");
215
case FLASH_28F128J3A:
216
printf ("28F128J3A (128 Mbit)\n");
225
printf ("Unknown Chip Type\n");
229
if ((info->size >> 20) > 0) {
230
printf (" Size: %ld MB in %d Sectors\n",
231
info->size >> 20, info->sector_count);
233
printf (" Size: %ld kB in %d Sectors\n",
234
info->size >> 10, info->sector_count);
237
printf (" Sector Start Addresses:");
238
for (i = 0; i < info->sector_count; ++i) {
242
info->start[i], info->protect[i] ? " (RO)" : " ");
248
/*-----------------------------------------------------------------------
252
/*-----------------------------------------------------------------------
256
* The following code cannot be run from FLASH!
259
static inline void flash_cmd (int width, volatile unsigned char *addr,
260
int offset, unsigned char cmd)
262
/* supports 1x8, 1x16, and 2x16 */
263
/* 2x8 and 4x8 are not supported */
265
/* assuming chips are in 16 bit mode */
267
unsigned long cmd32 = (cmd << 16) | cmd;
269
*(volatile unsigned long *) (addr + offset * 2) = cmd32;
272
*(volatile unsigned char *) (addr + offset) = cmd;
277
flash_get_size (int portwidth, vu_long * addr, flash_info_t * info)
280
volatile unsigned char *caddr = (unsigned char *) addr;
281
volatile unsigned short *saddr = (unsigned short *) addr;
282
volatile unsigned long *laddr = (unsigned long *) addr;
284
ulong id = 0, manu = 0, base = (ulong) addr;
287
printf ("%s: enter\n", __FUNCTION__);
289
info->portwidth = portwidth;
293
flash_cmd (portwidth, caddr, 0, 0xf0);
294
flash_cmd (portwidth, caddr, 0, 0xf0);
302
if (old[0] != 0xf0) {
303
flash_cmd (portwidth, caddr, 0, 0xf0);
304
flash_cmd (portwidth, caddr, 0, 0xf0);
308
if (*caddr == 0xf0) {
309
/* this area is ROM */
311
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
312
info->sector_count = 8;
313
info->size = 0x80000;
314
flash_get_offsets (base, info);
323
/* this area is RAM */
325
info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
326
info->sector_count = 8;
327
info->size = 0x80000;
328
flash_get_offsets (base, info);
331
flash_cmd (portwidth, caddr, 0, 0xf0);
336
/* Write auto select command: read Manufacturer ID */
337
flash_cmd (portwidth, caddr, 0x555, 0xAA);
338
flash_cmd (portwidth, caddr, 0x2AA, 0x55);
339
flash_cmd (portwidth, caddr, 0x555, 0x90);
343
if ((caddr[0] == old[0]) && (caddr[1] == old[1])) {
345
/* this area is ROM */
346
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
347
info->sector_count = 8;
348
info->size = 0x80000;
349
flash_get_offsets (base, info);
353
printf ("%px%d: %02x:%02x -> %02x:%02x\n",
354
caddr, portwidth, old[0], old[1], caddr[0], caddr[1]);
377
flash_cmd (portwidth, caddr, 0, 0xf0);
379
printf ("\n%08lx:%08lx:%08lx\n", base, manu, id);
380
printf ("%08lx %08lx %08lx %08lx\n",
381
laddr[0], laddr[1], laddr[2], laddr[3]);
386
info->flash_id = FLASH_MAN_STM;
389
info->flash_id = FLASH_MAN_AMD;
392
info->flash_id = FLASH_MAN_FUJ;
395
info->flash_id = FLASH_MAN_INTEL;
398
flash_cmd (portwidth, caddr, 0, 0xf0);
400
printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id);
401
info->flash_id = FLASH_UNKNOWN;
402
info->sector_count = 0;
404
return (0); /* no or unknown flash */
409
info->flash_id += FLASH_AM400T;
410
info->sector_count = 11;
411
info->size = 0x00100000;
416
info->flash_id += FLASH_AM400B;
417
info->sector_count = 11;
418
info->size = 0x00100000;
423
info->flash_id += FLASH_AM800T;
424
info->sector_count = 19;
425
info->size = 0x00200000;
430
info->flash_id += FLASH_AM800B;
431
info->sector_count = 19;
432
info->size = 0x00200000;
437
info->flash_id += FLASH_AM160T;
438
info->sector_count = 35;
439
info->size = 0x00400000;
444
info->flash_id += FLASH_AM160B;
445
info->sector_count = 35;
446
info->size = 0x00400000;
449
#if 0 /* enable when device IDs are available */
451
info->flash_id += FLASH_AM320T;
452
info->sector_count = 67;
453
info->size = 0x00800000;
457
info->flash_id += FLASH_AM320B;
458
info->sector_count = 67;
459
info->size = 0x00800000;
463
info->flash_id += FLASH_AM040;
464
info->sector_count = 8;
465
info->size = 0x80000;
467
break; /* => 512 kB */
469
case INTEL_ID_28F640J3A:
470
info->flash_id += FLASH_28F640J3A;
471
info->sector_count = 64;
472
info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */
475
info->size *= 2; /* 2x16 */
478
case INTEL_ID_28F128J3A:
479
info->flash_id += FLASH_28F128J3A;
480
info->sector_count = 128;
481
info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */
484
info->size *= 2; /* 2x16 */
488
flash_cmd (portwidth, caddr, 0, 0xf0);
490
printf ("Unknown id %lx:[%lx]\n", manu, id);
491
info->flash_id = FLASH_UNKNOWN;
493
return (0); /* => no or unknown flash */
497
flash_get_offsets (base, info);
500
/* check for protected sectors */
501
for (i = 0; i < info->sector_count; i++) {
502
/* read sector protection at sector address, (A7 .. A0)=0x02 */
503
/* D0 = 1 if protected */
504
caddr = (volatile unsigned char *) (info->start[i]);
505
saddr = (volatile unsigned short *) (info->start[i]);
506
laddr = (volatile unsigned long *) (info->start[i]);
508
info->protect[i] = caddr[2] & 1;
509
else if (portwidth == 2)
510
info->protect[i] = saddr[2] & 1;
512
info->protect[i] = laddr[2] & 1;
516
* Prevent writes to uninitialized FLASH.
518
if (info->flash_id != FLASH_UNKNOWN) {
519
caddr = (volatile unsigned char *) info->start[0];
521
flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */
527
int flash_erase (flash_info_t * info, int s_first, int s_last)
529
volatile unsigned char *addr = (uchar *) (info->start[0]);
530
int flag, prot, sect, l_sect;
531
ulong start, now, last;
533
/* modified to support 2x16 Intel flash */
534
/* Note that the code will not exit on a flash erasure error or timeout */
535
/* but will print and error message and continue processing sectors */
536
/* until they are all erased. */
537
/* 10-16-2002 P. Marchese */
541
if (info->portwidth == 4)
543
printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
547
/* make sure it's Intel flash */
548
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
549
/* yup! it's an Intel flash */
550
/* is it 16-bits wide? */
551
if (info->chipwidth == 2) {
552
/* yup! it's 16-bits wide */
553
/* are there any sectors to process? */
554
if ((s_first < 0) || (s_first > s_last)) {
555
printf ("Error: There are no sectors to erase\n");
556
printf ("Either sector %d is less than zero\n", s_first);
557
printf ("or sector %d is greater than sector %d\n", s_first, s_last);
560
/* check for protected sectors */
562
for (sect = s_first; sect <= s_last; ++sect)
563
if (info->protect[sect])
565
/* if variable "prot" is nonzero, there are protected sectors */
567
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
568
/* reset the flash */
569
flash_cmd (info->portwidth, addr, 0,
571
/* Disable interrupts which might cause a timeout here */
572
flag = disable_interrupts ();
573
/* Clear the status register */
574
flash_cmd (info->portwidth, addr, 0,
576
flash_cmd (info->portwidth, addr, 0,
578
/* Start erase on unprotected sectors */
579
for (sect = s_first; sect <= s_last; sect++) {
580
/* is the sector unprotected? */
581
if (info->protect[sect] == 0) { /* not protected */
582
/* issue the single block erase command, 0x20 */
583
flash_cmd (info->portwidth,
588
/* issue the erase confirm command, 0xD0 */
589
flash_cmd (info->portwidth,
595
/* re-enable interrupts if necessary */
597
enable_interrupts ();
598
/* poll for erasure completion */
599
/* put flash into read status mode by writing 0x70 to it */
600
flash_cmd (info->portwidth,
603
/* setup the status register mask */
604
mask = CHIP_STAT_RDY |
605
(CHIP_STAT_RDY << 16);
606
/* init. the timeout counter */
607
start = get_timer (0);
608
/* keep looping while the flash is not ready */
609
/* exit the loop by timing out or the flash */
610
/* becomes ready again */
615
start[sect] & mask) !=
617
/* has the timeout limit been reached? */
618
if (get_timer (start)
620
CONFIG_SYS_FLASH_ERASE_TOUT)
622
/* timeout limit reached */
623
printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]);
624
printf ("Continuing with next sector\n");
626
goto timed_out_error;
628
/* put flash into read status mode by writing 0x70 to it */
634
/* did we timeout? */
635
timed_out_error:if (timeout == 0)
637
/* didn't timeout, so check the status register */
638
/* create the status mask to check for errors */
639
mask = CHIP_STAT_ECLBS;
640
mask = mask | (mask <<
642
/* put flash into read status mode by writing 0x70 to it */
647
/* are there any errors? */
654
/* We got an erasure error */
655
printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]);
656
printf ("Continuing with next sector\n");
657
/* reset the flash */
666
/* erasure completed without errors */
667
/* reset the flash */
668
flash_cmd (info->portwidth,
671
} /* end if not protected */
673
printf ("Flash erasure done\n");
676
/* The Intel flash is not 16-bit wide */
677
/* print and error message and return */
678
/* NOTE: you can add routines here to handle other size flash */
679
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
680
printf ("The erasure code only handles Intel 16-bit wide flash memory\n");
684
/* Not Intel flash so return an error as a write timeout */
685
/* NOTE: if it's another type flash, stick its routine here */
686
printf ("Error: The flash device is not Intel type\n");
687
printf ("The erasure code only supports Intel flash in a 32-bit port width\n");
692
/* end 32-bit wide flash code */
693
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
694
return 1; /* Rom can not be erased */
695
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */
696
for (sect = s_first; sect <= s_last; sect++) {
697
int sector_size = info->size / info->sector_count;
699
addr = (uchar *) (info->start[sect]);
700
memset ((void *) addr, 0, sector_size);
705
if ((s_first < 0) || (s_first > s_last)) {
706
if (info->flash_id == FLASH_UNKNOWN) {
707
printf ("- missing\n");
709
printf ("- no sectors to erase\n");
714
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */
715
return flash_erase_intel (info,
716
(unsigned short) s_first,
717
(unsigned short) s_last);
720
if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */
721
(info->flash_id > FLASH_AMD_COMP)) {
722
printf ("Can't erase unknown flash type %08lx - aborted\n",
729
for (sect = s_first; sect <= s_last; ++sect) {
730
if (info->protect[sect]) {
736
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
743
/* Disable interrupts which might cause a timeout here */
744
flag = disable_interrupts ();
746
flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */
747
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
748
flash_cmd (info->portwidth, addr, 0x555, 0x80);
749
flash_cmd (info->portwidth, addr, 0x555, 0xAA);
750
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
752
/* Start erase on unprotected sectors */
753
for (sect = s_first; sect <= s_last; sect++) {
754
if (info->protect[sect] == 0) { /* not protected */
755
addr = (uchar *) (info->start[sect]);
756
flash_cmd (info->portwidth, addr, 0, 0x30);
761
/* re-enable interrupts if necessary */
763
enable_interrupts ();
765
/* wait at least 80us - let's wait 1 ms */
769
* We wait for the last triggered sector
774
start = get_timer (0);
776
addr = (volatile unsigned char *) (info->start[l_sect]);
777
/* broken for 2x16: TODO */
778
while ((addr[0] & 0x80) != 0x80) {
779
if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
780
printf ("Timeout\n");
783
/* show that we're waiting */
784
if ((now - last) > 1000) { /* every second */
791
/* reset to read mode */
792
addr = (volatile unsigned char *) info->start[0];
793
flash_cmd (info->portwidth, addr, 0, 0xf0);
794
flash_cmd (info->portwidth, addr, 0, 0xf0);
800
/*-----------------------------------------------------------------------
801
* Copy memory to flash, returns:
804
* 2 - Flash not erased
807
/* broken for 2x16: TODO */
808
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
813
/* Commented out since the below code should work for 32-bit(2x 16 flash) */
814
/* 10-16-2002 P. Marchese */
815
/* if(info->portwidth==4) return 1; */
816
/* if(info->portwidth==4) {
817
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
821
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
823
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
824
memcpy ((void *) addr, src, cnt);
828
wp = (addr & ~3); /* get lower word aligned address */
831
* handle unaligned start bytes
833
if ((l = addr - wp) != 0) {
835
for (i = 0, cp = wp; i < l; ++i, ++cp) {
836
data = (data << 8) | (*(uchar *) cp);
838
for (; i < 4 && cnt > 0; ++i) {
839
data = (data << 8) | *src++;
843
for (; cnt == 0 && i < 4; ++i, ++cp) {
844
data = (data << 8) | (*(uchar *) cp);
847
if ((rc = write_word (info, wp, data)) != 0) {
854
* handle word aligned part
858
for (i = 0; i < 4; ++i) {
859
data = (data << 8) | *src++;
861
if ((rc = write_word (info, wp, data)) != 0) {
873
* handle unaligned tail bytes
876
for (i = 0, cp = wp; i < 4 && cnt > 0; ++i, ++cp) {
877
data = (data << 8) | *src++;
880
for (; i < 4; ++i, ++cp) {
881
data = (data << 8) | (*(uchar *) cp);
884
return (write_word (info, wp, data));
887
/*-----------------------------------------------------------------------
888
* Write a word to Flash, returns:
891
* 2 - Flash not erased
893
/* broken for 2x16: TODO */
894
static int write_word (flash_info_t * info, ulong dest, ulong data)
896
volatile unsigned char *addr = (uchar *) (info->start[0]);
901
/* modified so that it handles 32-bit(2x16 Intel flash programming */
902
/* 10-16-2002 P. Marchese */
904
if (info->portwidth == 4)
906
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
910
/* make sure it's Intel flash */
911
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
912
/* yup! it's an Intel flash */
913
/* is it 16-bits wide? */
914
if (info->chipwidth == 2) {
915
/* yup! it's 16-bits wide */
916
/* so we know how to program it */
917
/* reset the flash */
918
flash_cmd (info->portwidth, addr, 0,
920
/* Disable interrupts which might cause a timeout here */
921
flag = disable_interrupts ();
922
/* Clear the status register */
923
flash_cmd (info->portwidth, addr, 0,
925
flash_cmd (info->portwidth, addr, 0,
927
/* 1st cycle of word/byte program */
928
/* write 0x40 to the location to program */
929
flash_cmd (info->portwidth, (uchar *) dest, 0,
931
/* 2nd cycle of word/byte program */
932
/* write the data to the destination address */
933
*(ulong *) dest = data;
934
/* re-enable interrupts if necessary */
936
enable_interrupts ();
937
/* setup the status register mask */
938
mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16);
939
/* put flash into read status mode by writing 0x70 to it */
940
flash_cmd (info->portwidth, addr, 0,
942
/* init. the timeout counter */
943
start = get_timer (0);
944
/* keep looping while the flash is not ready */
945
/* exit the loop by timing out or the flash */
946
/* becomes ready again */
947
/* 11-13-2002 Paul Marchese */
948
/* modified while loop conditional statement */
949
/* because we were always timing out. */
950
/* there is a type mismatch, "addr[0]" */
951
/* returns a byte but "mask" is a 32-bit value */
952
while ((*(volatile unsigned long *) info->
953
start[0] & mask) != mask)
955
/* while (addr[0] & mask) != mask) */
957
/* has the timeout limit been reached? */
958
if (get_timer (start) >
959
CONFIG_SYS_FLASH_WRITE_TOUT) {
960
/* timeout limit reached */
961
printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data);
962
/* reset the flash */
963
flash_cmd (info->portwidth,
968
/* put flash into read status mode by writing 0x70 to it */
969
flash_cmd (info->portwidth, addr, 0,
972
/* flash is ready, so check the status */
973
/* create the status mask to check for errors */
974
mask = CHIP_STAT_DPS | CHIP_STAT_VPPS |
976
mask = mask | (mask << 16);
977
/* put flash into read status mode by writing 0x70 to it */
978
flash_cmd (info->portwidth, addr, 0,
980
/* are there any errors? */
981
if ((addr[0] & mask) != 0) {
982
/* We got a one of the following errors: */
983
/* Voltage range, Device protect, or programming */
984
/* return the error as a device timeout */
985
/* put flash into read status mode by writing 0x70 to it */
986
flash_cmd (info->portwidth, addr, 0,
988
printf ("Flash programming error at address 0x%08lx\n", dest);
989
printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]);
990
/* reset the flash */
991
flash_cmd (info->portwidth, addr, 0,
995
/* write completed without errors */
996
/* reset the flash */
997
flash_cmd (info->portwidth, addr, 0,
1001
/* it's not 16-bits wide, so return an error as a write timeout */
1002
/* NOTE: you can add routines here to handle other size flash */
1003
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
1004
printf ("The write code only handles Intel 16-bit wide flash memory\n");
1008
/* not Intel flash so return an error as a write timeout */
1009
/* NOTE: if it's another type flash, stick its routine here */
1010
printf ("Error: The flash device is not Intel type\n");
1011
printf ("The code only supports Intel flash in a 32-bit port width\n");
1016
/* end of 32-bit flash code */
1017
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
1019
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
1020
*(unsigned long *) dest = data;
1023
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
1024
unsigned short low = data & 0xffff;
1025
unsigned short hi = (data >> 16) & 0xffff;
1026
int ret = write_word_intel ((bank_addr_t) dest, hi);
1029
ret = write_word_intel ((bank_addr_t) (dest + 2),
1035
/* Check if Flash is (sufficiently) erased */
1036
if ((*((vu_long *) dest) & data) != data) {
1039
/* Disable interrupts which might cause a timeout here */
1040
flag = disable_interrupts ();
1042
/* first, perform an unlock bypass command to speed up flash writes */
1047
/* write each byte out */
1048
for (i = 0; i < 4; i++) {
1049
char *data_ch = (char *) &data;
1052
*(((char *) dest) + i) = data_ch[i];
1053
udelay (10); /* XXX */
1056
/* we're done, now do an unlock bypass reset */
1060
/* re-enable interrupts if necessary */
1062
enable_interrupts ();
1064
/* data polling for D7 */
1065
start = get_timer (0);
1066
while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) {
1067
if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {