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Add dedicated chip erase function for SST49LF040

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Corresponding to flashrom svn r31 and coreboot v2 svn r1852.
This commit is contained in:
Ollie Lho 2005-01-11 02:48:22 +00:00
parent efa28589b1
commit a1439cfdee
3 changed files with 19 additions and 3 deletions
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2
flash_rom.c
View File

@ -66,7 +66,7 @@ struct flashchip flashchips[] = {
{"SST39VF020", SST_ID, SST_39VF020, NULL, 256, 4096, {"SST39VF020", SST_ID, SST_39VF020, NULL, 256, 4096,
probe_jedec, erase_chip_jedec, write_39sf020,NULL}, probe_jedec, erase_chip_jedec, write_39sf020,NULL},
{"SST49LF040", SST_ID, SST_49LF040, NULL, 512, 4096, {"SST49LF040", SST_ID, SST_49LF040, NULL, 512, 4096,
probe_jedec, erase_chip_jedec, write_49lf040,NULL}, probe_jedec, erase_49lf040, write_49lf040,NULL},
{"SST49LF080A", SST_ID, SST_49LF080A, NULL, 1024, 4096, {"SST49LF080A", SST_ID, SST_49LF080A, NULL, 1024, 4096,
probe_jedec, erase_chip_jedec, write_49lf040,NULL}, probe_jedec, erase_chip_jedec, write_49lf040,NULL},
{"SST49LF002A/B", SST_ID, SST_49LF002A, NULL, 256, 16 * 1024, {"SST49LF002A/B", SST_ID, SST_49LF002A, NULL, 256, 16 * 1024,

19
sst49lf040.c
View File

@ -30,6 +30,21 @@
#include "jedec.h" #include "jedec.h"
#include "sst49lf040.h" #include "sst49lf040.h"
int erase_49lf040(struct flashchip *flash)
{
int i;
int total_size = flash->total_size * 1024;
int page_size = flash->page_size;
volatile char *bios = flash->virt_addr;
for (i = 0; i < total_size / page_size; i++) {
/* Chip erase only works in parallel programming mode
* for the 49lf040. Use sector-erase instead */
erase_sector_jedec(bios, i * page_size);
}
return 0;
}
int write_49lf040(struct flashchip *flash, unsigned char *buf) int write_49lf040(struct flashchip *flash, unsigned char *buf)
{ {
int i; int i;
@ -40,8 +55,8 @@ int write_49lf040(struct flashchip *flash, unsigned char *buf)
printf("Programming Page: "); printf("Programming Page: ");
for (i = 0; i < total_size / page_size; i++) { for (i = 0; i < total_size / page_size; i++) {
/* erase the page before programming /* erase the page before programming
* Chip erase only works in parallel programming mode for the 49lf040. * Chip erase only works in parallel programming mode
* Use sector-erase instead */ * for the 49lf040. Use sector-erase instead */
erase_sector_jedec(bios, i * page_size); erase_sector_jedec(bios, i * page_size);
/* write to the sector */ /* write to the sector */

1
sst49lf040.h
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@ -1,6 +1,7 @@
#ifndef __SST49LF040_H__ #ifndef __SST49LF040_H__
#define __SST49LF040_H__ 1 #define __SST49LF040_H__ 1
extern int erase_49lf040(struct flashchip *flash);
extern int write_49lf040(struct flashchip *flash, unsigned char *buf); extern int write_49lf040(struct flashchip *flash, unsigned char *buf);
#endif /* !__SST49LF040_H__ */ #endif /* !__SST49LF040_H__ */