3 * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
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 #include <asm/processor.h>
29 * This file implements a Common Flash Interface (CFI) driver for ppcboot.
30 * The width of the port and the width of the chips are determined at initialization.
31 * These widths are used to calculate the address for access CFI data structures.
32 * It has been tested on an Intel Strataflash implementation.
35 * JEDEC Standard JESD68 - Common Flash Interface (CFI)
36 * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
37 * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
38 * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
41 * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
42 * Add support for other command sets Use the PRI and ALT to determine command set
43 * Verify erase and program timeouts.
46 #define FLASH_CMD_CFI 0x98
47 #define FLASH_CMD_READ_ID 0x90
48 #define FLASH_CMD_RESET 0xff
49 #define FLASH_CMD_BLOCK_ERASE 0x20
50 #define FLASH_CMD_ERASE_CONFIRM 0xD0
51 #define FLASH_CMD_WRITE 0x40
52 #define FLASH_CMD_PROTECT 0x60
53 #define FLASH_CMD_PROTECT_SET 0x01
54 #define FLASH_CMD_PROTECT_CLEAR 0xD0
55 #define FLASH_CMD_CLEAR_STATUS 0x50
56 #define FLASH_CMD_WRITE_TO_BUFFER 0xE8
57 #define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
59 #define FLASH_STATUS_DONE 0x80
60 #define FLASH_STATUS_ESS 0x40
61 #define FLASH_STATUS_ECLBS 0x20
62 #define FLASH_STATUS_PSLBS 0x10
63 #define FLASH_STATUS_VPENS 0x08
64 #define FLASH_STATUS_PSS 0x04
65 #define FLASH_STATUS_DPS 0x02
66 #define FLASH_STATUS_R 0x01
67 #define FLASH_STATUS_PROTECT 0x01
69 #define FLASH_OFFSET_CFI 0x55
70 #define FLASH_OFFSET_CFI_RESP 0x10
71 #define FLASH_OFFSET_WTOUT 0x1F
72 #define FLASH_OFFSET_WBTOUT 0x20
73 #define FLASH_OFFSET_ETOUT 0x21
74 #define FLASH_OFFSET_CETOUT 0x22
75 #define FLASH_OFFSET_WMAX_TOUT 0x23
76 #define FLASH_OFFSET_WBMAX_TOUT 0x24
77 #define FLASH_OFFSET_EMAX_TOUT 0x25
78 #define FLASH_OFFSET_CEMAX_TOUT 0x26
79 #define FLASH_OFFSET_SIZE 0x27
80 #define FLASH_OFFSET_INTERFACE 0x28
81 #define FLASH_OFFSET_BUFFER_SIZE 0x2A
82 #define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
83 #define FLASH_OFFSET_ERASE_REGIONS 0x2D
84 #define FLASH_OFFSET_PROTECT 0x02
85 #define FLASH_OFFSET_USER_PROTECTION 0x85
86 #define FLASH_OFFSET_INTEL_PROTECTION 0x81
89 #define FLASH_MAN_CFI 0x01000000
104 #define NUM_ERASE_REGIONS 4
106 flash_info_t flash_info
[CFG_MAX_FLASH_BANKS
]; /* info for FLASH chips */
109 /*-----------------------------------------------------------------------
114 static void flash_add_byte(flash_info_t
*info
, cfiword_t
* cword
, uchar c
);
115 static void flash_make_cmd(flash_info_t
* info
, uchar cmd
, void * cmdbuf
);
116 static void flash_write_cmd(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
);
117 static int flash_isequal(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
);
118 static int flash_isset(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
);
119 static int flash_detect_cfi(flash_info_t
* info
);
120 static ulong
flash_get_size (ulong base
, int banknum
);
121 static int flash_write_cfiword (flash_info_t
*info
, ulong dest
, cfiword_t cword
);
122 static int flash_full_status_check(flash_info_t
* info
, ulong sector
, ulong tout
, char * prompt
);
123 #ifdef CFG_FLASH_USE_BUFFER_WRITE
124 static int flash_write_cfibuffer(flash_info_t
* info
, ulong dest
, uchar
* cp
, int len
);
126 /*-----------------------------------------------------------------------
127 * create an address based on the offset and the port width
129 inline uchar
* flash_make_addr(flash_info_t
* info
, int sect
, int offset
)
131 return ((uchar
*)(info
->start
[sect
] + (offset
* info
->portwidth
)));
133 /*-----------------------------------------------------------------------
134 * read a character at a port width address
136 inline uchar
flash_read_uchar(flash_info_t
* info
, uchar offset
)
139 cp
= flash_make_addr(info
, 0, offset
);
140 return (cp
[info
->portwidth
- 1]);
143 /*-----------------------------------------------------------------------
144 * read a short word by swapping for ppc format.
146 ushort
flash_read_ushort(flash_info_t
* info
, int sect
, uchar offset
)
150 addr
= flash_make_addr(info
, sect
, offset
);
151 return ((addr
[(2*info
->portwidth
) - 1] << 8) | addr
[info
->portwidth
- 1]);
155 /*-----------------------------------------------------------------------
156 * read a long word by picking the least significant byte of each maiximum
157 * port size word. Swap for ppc format.
159 ulong
flash_read_long(flash_info_t
* info
, int sect
, uchar offset
)
163 addr
= flash_make_addr(info
, sect
, offset
);
164 return ( (addr
[(2*info
->portwidth
) - 1] << 24 ) | (addr
[(info
->portwidth
) -1] << 16) |
165 (addr
[(4*info
->portwidth
) - 1] << 8) | addr
[(3*info
->portwidth
) - 1]);
169 /*-----------------------------------------------------------------------
171 unsigned long flash_init (void)
175 unsigned long address
;
178 /* The flash is positioned back to back, with the demultiplexing of the chip
179 * based on the A24 address line.
183 address
= CFG_FLASH_BASE
;
186 /* Init: no FLASHes known */
187 for (i
=0; i
<CFG_MAX_FLASH_BANKS
; ++i
) {
188 flash_info
[i
].flash_id
= FLASH_UNKNOWN
;
189 size
+= flash_info
[i
].size
= flash_get_size(address
, i
);
190 address
+= CFG_FLASH_INCREMENT
;
191 if (flash_info
[0].flash_id
== FLASH_UNKNOWN
) {
192 printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",i
,
193 flash_info
[0].size
, flash_info
[i
].size
<<20);
197 #if 0 /* test-only */
198 /* Monitor protection ON by default */
199 #if (CFG_MONITOR_BASE >= CFG_FLASH_BASE)
200 for(i
=0; flash_info
[0].start
[i
] < CFG_MONITOR_BASE
+CFG_MONITOR_LEN
-1; i
++)
201 (void)flash_real_protect(&flash_info
[0], i
, 1);
204 /* monitor protection ON by default */
205 flash_protect (FLAG_PROTECT_SET
,
207 - 1, &flash_info
[1]);
213 /*-----------------------------------------------------------------------
215 int flash_erase (flash_info_t
*info
, int s_first
, int s_last
)
221 if( info
->flash_id
!= FLASH_MAN_CFI
) {
222 printf ("Can't erase unknown flash type - aborted\n");
225 if ((s_first
< 0) || (s_first
> s_last
)) {
226 printf ("- no sectors to erase\n");
231 for (sect
=s_first
; sect
<=s_last
; ++sect
) {
232 if (info
->protect
[sect
]) {
237 printf ("- Warning: %d protected sectors will not be erased!\n",
244 for (sect
= s_first
; sect
<=s_last
; sect
++) {
245 if (info
->protect
[sect
] == 0) { /* not protected */
246 flash_write_cmd(info
, sect
, 0, FLASH_CMD_CLEAR_STATUS
);
247 flash_write_cmd(info
, sect
, 0, FLASH_CMD_BLOCK_ERASE
);
248 flash_write_cmd(info
, sect
, 0, FLASH_CMD_ERASE_CONFIRM
);
250 if(flash_full_status_check(info
, sect
, info
->erase_blk_tout
, "erase")) {
260 /*-----------------------------------------------------------------------
262 void flash_print_info (flash_info_t
*info
)
266 if (info
->flash_id
!= FLASH_MAN_CFI
) {
267 printf ("missing or unknown FLASH type\n");
271 printf("CFI conformant FLASH (%d x %d)",
272 (info
->portwidth
<< 3 ), (info
->chipwidth
<< 3 ));
273 printf (" Size: %ld MB in %d Sectors\n",
274 info
->size
>> 20, info
->sector_count
);
275 printf(" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
276 info
->erase_blk_tout
, info
->write_tout
, info
->buffer_write_tout
, info
->buffer_size
);
278 printf (" Sector Start Addresses:");
279 for (i
=0; i
<info
->sector_count
; ++i
) {
280 #ifdef CFG_FLASH_EMPTY_INFO
284 volatile unsigned long *flash
;
287 * Check if whole sector is erased
289 if (i
!= (info
->sector_count
-1))
290 size
= info
->start
[i
+1] - info
->start
[i
];
292 size
= info
->start
[0] + info
->size
- info
->start
[i
];
294 flash
= (volatile unsigned long *)info
->start
[i
];
295 size
= size
>> 2; /* divide by 4 for longword access */
296 for (k
=0; k
<size
; k
++)
298 if (*flash
++ != 0xffffffff)
307 /* print empty and read-only info */
308 printf (" %08lX%s%s",
311 info
->protect
[i
] ? "RO " : " ");
317 info
->protect
[i
] ? " (RO)" : " ");
324 /*-----------------------------------------------------------------------
325 * Copy memory to flash, returns:
328 * 2 - Flash not erased
330 int write_buff (flash_info_t
*info
, uchar
*src
, ulong addr
, ulong cnt
)
338 /* get lower aligned address */
339 wp
= (addr
& ~(info
->portwidth
- 1));
341 /* handle unaligned start */
342 if((aln
= addr
- wp
) != 0) {
345 for(i
=0;i
<aln
; ++i
, ++cp
)
346 flash_add_byte(info
, &cword
, (*(uchar
*)cp
));
348 for(; (i
< info
->portwidth
) && (cnt
> 0) ; i
++) {
349 flash_add_byte(info
, &cword
, *src
++);
353 for(; (cnt
== 0) && (i
< info
->portwidth
); ++i
, ++cp
)
354 flash_add_byte(info
, &cword
, (*(uchar
*)cp
));
355 if((rc
= flash_write_cfiword(info
, wp
, cword
)) != 0)
360 #ifdef CFG_FLASH_USE_BUFFER_WRITE
361 while(cnt
>= info
->portwidth
) {
362 i
= info
->buffer_size
> cnt
? cnt
: info
->buffer_size
;
363 if((rc
= flash_write_cfibuffer(info
, wp
, src
,i
)) != ERR_OK
)
370 /* handle the aligned part */
371 while(cnt
>= info
->portwidth
) {
373 for(i
= 0; i
< info
->portwidth
; i
++) {
374 flash_add_byte(info
, &cword
, *src
++);
376 if((rc
= flash_write_cfiword(info
, wp
, cword
)) != 0)
378 wp
+= info
->portwidth
;
379 cnt
-= info
->portwidth
;
381 #endif /* CFG_FLASH_USE_BUFFER_WRITE */
387 * handle unaligned tail bytes
390 for (i
=0, cp
=wp
; (i
<info
->portwidth
) && (cnt
>0); ++i
, ++cp
) {
391 flash_add_byte(info
, &cword
, *src
++);
394 for (; i
<info
->portwidth
; ++i
, ++cp
) {
395 flash_add_byte(info
, & cword
, (*(uchar
*)cp
));
398 return flash_write_cfiword(info
, wp
, cword
);
401 /*-----------------------------------------------------------------------
403 int flash_real_protect(flash_info_t
*info
, long sector
, int prot
)
407 flash_write_cmd(info
, sector
, 0, FLASH_CMD_CLEAR_STATUS
);
408 flash_write_cmd(info
, sector
, 0, FLASH_CMD_PROTECT
);
410 flash_write_cmd(info
, sector
, 0, FLASH_CMD_PROTECT_SET
);
412 flash_write_cmd(info
, sector
, 0, FLASH_CMD_PROTECT_CLEAR
);
414 if((retcode
= flash_full_status_check(info
, sector
, info
->erase_blk_tout
,
415 prot
?"protect":"unprotect")) == 0) {
417 info
->protect
[sector
] = prot
;
418 /* Intel's unprotect unprotects all locking */
421 for(i
= 0 ; i
<info
->sector_count
; i
++) {
423 flash_real_protect(info
, i
, 1);
430 /*-----------------------------------------------------------------------
431 * wait for XSR.7 to be set. Time out with an error if it does not.
432 * This routine does not set the flash to read-array mode.
434 static int flash_status_check(flash_info_t
* info
, ulong sector
, ulong tout
, char * prompt
)
438 /* Wait for command completion */
439 start
= get_timer (0);
440 while(!flash_isset(info
, sector
, 0, FLASH_STATUS_DONE
)) {
441 if (get_timer(start
) > info
->erase_blk_tout
) {
442 printf("Flash %s timeout at address %lx\n", prompt
, info
->start
[sector
]);
443 flash_write_cmd(info
, sector
, 0, FLASH_CMD_RESET
);
449 /*-----------------------------------------------------------------------
450 * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
451 * This routine sets the flash to read-array mode.
453 static int flash_full_status_check(flash_info_t
* info
, ulong sector
, ulong tout
, char * prompt
)
456 retcode
= flash_status_check(info
, sector
, tout
, prompt
);
457 if((retcode
== ERR_OK
) && !flash_isequal(info
,sector
, 0, FLASH_STATUS_DONE
)) {
459 printf("Flash %s error at address %lx\n", prompt
,info
->start
[sector
]);
460 if(flash_isset(info
, sector
, 0, FLASH_STATUS_ECLBS
| FLASH_STATUS_PSLBS
)){
461 printf("Command Sequence Error.\n");
462 } else if(flash_isset(info
, sector
, 0, FLASH_STATUS_ECLBS
)){
463 printf("Block Erase Error.\n");
464 retcode
= ERR_NOT_ERASED
;
465 } else if (flash_isset(info
, sector
, 0, FLASH_STATUS_PSLBS
)) {
466 printf("Locking Error\n");
468 if(flash_isset(info
, sector
, 0, FLASH_STATUS_DPS
)){
469 printf("Block locked.\n");
470 retcode
= ERR_PROTECTED
;
472 if(flash_isset(info
, sector
, 0, FLASH_STATUS_VPENS
))
473 printf("Vpp Low Error.\n");
475 flash_write_cmd(info
, sector
, 0, FLASH_CMD_RESET
);
478 /*-----------------------------------------------------------------------
480 static void flash_add_byte(flash_info_t
*info
, cfiword_t
* cword
, uchar c
)
482 switch(info
->portwidth
) {
486 case FLASH_CFI_16BIT
:
487 cword
->w
= (cword
->w
<< 8) | c
;
489 case FLASH_CFI_32BIT
:
490 cword
->l
= (cword
->l
<< 8) | c
;
495 /*-----------------------------------------------------------------------
496 * make a proper sized command based on the port and chip widths
498 static void flash_make_cmd(flash_info_t
* info
, uchar cmd
, void * cmdbuf
)
501 uchar
*cp
= (uchar
*)cmdbuf
;
502 for(i
=0; i
< info
->portwidth
; i
++)
503 *cp
++ = ((i
+1) % info
->chipwidth
) ? '\0':cmd
;
507 * Write a proper sized command to the correct address
509 static void flash_write_cmd(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
)
512 volatile cfiptr_t addr
;
514 addr
.cp
= flash_make_addr(info
, sect
, offset
);
515 flash_make_cmd(info
, cmd
, &cword
);
516 switch(info
->portwidth
) {
520 case FLASH_CFI_16BIT
:
523 case FLASH_CFI_32BIT
:
529 /*-----------------------------------------------------------------------
531 static int flash_isequal(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
)
536 cptr
.cp
= flash_make_addr(info
, sect
, offset
);
537 flash_make_cmd(info
, cmd
, &cword
);
538 switch(info
->portwidth
) {
540 retval
= (cptr
.cp
[0] == cword
.c
);
542 case FLASH_CFI_16BIT
:
543 retval
= (cptr
.wp
[0] == cword
.w
);
545 case FLASH_CFI_32BIT
:
546 retval
= (cptr
.lp
[0] == cword
.l
);
554 /*-----------------------------------------------------------------------
556 static int flash_isset(flash_info_t
* info
, int sect
, uchar offset
, uchar cmd
)
561 cptr
.cp
= flash_make_addr(info
, sect
, offset
);
562 flash_make_cmd(info
, cmd
, &cword
);
563 switch(info
->portwidth
) {
565 retval
= ((cptr
.cp
[0] & cword
.c
) == cword
.c
);
567 case FLASH_CFI_16BIT
:
568 retval
= ((cptr
.wp
[0] & cword
.w
) == cword
.w
);
570 case FLASH_CFI_32BIT
:
571 retval
= ((cptr
.lp
[0] & cword
.l
) == cword
.l
);
580 /*-----------------------------------------------------------------------
581 * detect if flash is compatible with the Common Flash Interface (CFI)
582 * http://www.jedec.org/download/search/jesd68.pdf
585 static int flash_detect_cfi(flash_info_t
* info
)
588 for(info
->portwidth
=FLASH_CFI_8BIT
; info
->portwidth
<= FLASH_CFI_32BIT
;
589 info
->portwidth
<<= 1) {
590 for(info
->chipwidth
=FLASH_CFI_BY8
;
591 info
->chipwidth
<= info
->portwidth
;
592 info
->chipwidth
<<= 1) {
593 flash_write_cmd(info
, 0, 0, FLASH_CMD_RESET
);
594 flash_write_cmd(info
, 0, FLASH_OFFSET_CFI
, FLASH_CMD_CFI
);
595 if(flash_isequal(info
, 0, FLASH_OFFSET_CFI_RESP
,'Q') &&
596 flash_isequal(info
, 0, FLASH_OFFSET_CFI_RESP
+ 1, 'R') &&
597 flash_isequal(info
, 0, FLASH_OFFSET_CFI_RESP
+ 2, 'Y'))
604 * The following code cannot be run from FLASH!
607 static ulong
flash_get_size (ulong base
, int banknum
)
609 flash_info_t
* info
= &flash_info
[banknum
];
612 unsigned long sector
;
615 uchar num_erase_regions
;
616 int erase_region_size
;
617 int erase_region_count
;
619 info
->start
[0] = base
;
621 if(flash_detect_cfi(info
)){
623 printf("portwidth=%d chipwidth=%d\n", info
->portwidth
, info
->chipwidth
); /* test-only */
625 size_ratio
= info
->portwidth
/ info
->chipwidth
;
626 num_erase_regions
= flash_read_uchar(info
, FLASH_OFFSET_NUM_ERASE_REGIONS
);
628 printf("found %d erase regions\n", num_erase_regions
);
632 for(i
= 0 ; i
< num_erase_regions
; i
++) {
633 if(i
> NUM_ERASE_REGIONS
) {
634 printf("%d erase regions found, only %d used\n",
635 num_erase_regions
, NUM_ERASE_REGIONS
);
638 tmp
= flash_read_long(info
, 0, FLASH_OFFSET_ERASE_REGIONS
);
639 erase_region_size
= (tmp
& 0xffff)? ((tmp
& 0xffff) * 256): 128;
641 erase_region_count
= (tmp
& 0xffff) +1;
642 for(j
= 0; j
< erase_region_count
; j
++) {
643 info
->start
[sect_cnt
] = sector
;
644 sector
+= (erase_region_size
* size_ratio
);
645 info
->protect
[sect_cnt
] = flash_isset(info
, sect_cnt
, FLASH_OFFSET_PROTECT
, FLASH_STATUS_PROTECT
);
650 info
->sector_count
= sect_cnt
;
651 /* multiply the size by the number of chips */
652 info
->size
= (1 << flash_read_uchar(info
, FLASH_OFFSET_SIZE
)) * size_ratio
;
653 info
->buffer_size
= (1 << flash_read_ushort(info
, 0, FLASH_OFFSET_BUFFER_SIZE
));
654 tmp
= 1 << flash_read_uchar(info
, FLASH_OFFSET_ETOUT
);
655 info
->erase_blk_tout
= (tmp
* (1 << flash_read_uchar(info
, FLASH_OFFSET_EMAX_TOUT
)));
656 tmp
= 1 << flash_read_uchar(info
, FLASH_OFFSET_WBTOUT
);
657 info
->buffer_write_tout
= (tmp
* (1 << flash_read_uchar(info
, FLASH_OFFSET_WBMAX_TOUT
)));
658 tmp
= 1 << flash_read_uchar(info
, FLASH_OFFSET_WTOUT
);
659 info
->write_tout
= (tmp
* (1 << flash_read_uchar(info
, FLASH_OFFSET_WMAX_TOUT
)))/ 1000;
660 info
->flash_id
= FLASH_MAN_CFI
;
663 flash_write_cmd(info
, 0, 0, FLASH_CMD_RESET
);
668 /*-----------------------------------------------------------------------
670 static int flash_write_cfiword (flash_info_t
*info
, ulong dest
, cfiword_t cword
)
677 ctladdr
.cp
= flash_make_addr(info
, 0, 0);
678 cptr
.cp
= (uchar
*)dest
;
681 /* Check if Flash is (sufficiently) erased */
682 switch(info
->portwidth
) {
684 flag
= ((cptr
.cp
[0] & cword
.c
) == cword
.c
);
686 case FLASH_CFI_16BIT
:
687 flag
= ((cptr
.wp
[0] & cword
.w
) == cword
.w
);
689 case FLASH_CFI_32BIT
:
690 flag
= ((cptr
.lp
[0] & cword
.l
) == cword
.l
);
698 /* Disable interrupts which might cause a timeout here */
699 flag
= disable_interrupts();
701 flash_write_cmd(info
, 0, 0, FLASH_CMD_CLEAR_STATUS
);
702 flash_write_cmd(info
, 0, 0, FLASH_CMD_WRITE
);
704 switch(info
->portwidth
) {
706 cptr
.cp
[0] = cword
.c
;
708 case FLASH_CFI_16BIT
:
709 cptr
.wp
[0] = cword
.w
;
711 case FLASH_CFI_32BIT
:
712 cptr
.lp
[0] = cword
.l
;
716 /* re-enable interrupts if necessary */
720 return flash_full_status_check(info
, 0, info
->write_tout
, "write");
723 #ifdef CFG_FLASH_USE_BUFFER_WRITE
725 /* loop through the sectors from the highest address
726 * when the passed address is greater or equal to the sector address
729 static int find_sector(flash_info_t
*info
, ulong addr
)
732 for(sector
= info
->sector_count
- 1; sector
>= 0; sector
--) {
733 if(addr
>= info
->start
[sector
])
739 static int flash_write_cfibuffer(flash_info_t
* info
, ulong dest
, uchar
* cp
, int len
)
745 volatile cfiptr_t src
;
746 volatile cfiptr_t dst
;
749 dst
.cp
= (uchar
*)dest
;
750 sector
= find_sector(info
, dest
);
751 flash_write_cmd(info
, sector
, 0, FLASH_CMD_CLEAR_STATUS
);
752 flash_write_cmd(info
, sector
, 0, FLASH_CMD_WRITE_TO_BUFFER
);
753 if((retcode
= flash_status_check(info
, sector
, info
->buffer_write_tout
,
754 "write to buffer")) == ERR_OK
) {
755 switch(info
->portwidth
) {
759 case FLASH_CFI_16BIT
:
762 case FLASH_CFI_32BIT
:
769 flash_write_cmd(info
, sector
, 0, (uchar
)cnt
-1);
771 switch(info
->portwidth
) {
773 *dst
.cp
++ = *src
.cp
++;
775 case FLASH_CFI_16BIT
:
776 *dst
.wp
++ = *src
.wp
++;
778 case FLASH_CFI_32BIT
:
779 *dst
.lp
++ = *src
.lp
++;
786 flash_write_cmd(info
, sector
, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM
);
787 retcode
= flash_full_status_check(info
, sector
, info
->buffer_write_tout
,
790 flash_write_cmd(info
, sector
, 0, FLASH_CMD_CLEAR_STATUS
);
793 #endif /* CFG_USE_FLASH_BUFFER_WRITE */