openwrt/flashrom
1
0
Fork 0
mirror of https://review.coreboot.org/flashrom.git synced 2025-07-01 22:21:16 +02:00
Code Issues Releases Wiki Activity

SST49LF00[2,3,4] should use the same driver as 49LF008

Browse Source 
Corresponding to flashrom svn r27 and coreboot v2 svn r1812.
This commit is contained in:
Ollie Lho
2004-12-07 03:15:51 +00:00
parent ad8ffd2e76
commit 98bea8aba5
3 changed files with 49 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
jedec.c
View File

@ -89,6 +89,7 @@ int erase_sector_jedec(volatile unsigned char *bios, unsigned int page)
return (0);
}
int erase_block_jedec(volatile unsigned char *bios, unsigned int block)
{
volatile unsigned char *Temp;
@ -149,43 +150,45 @@ int erase_chip_jedec(struct flashchip *flash)
return (0);
}
void write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
volatile unsigned char *dst, int page_size)
int write_page_write_jedec(volatile unsigned char *bios, unsigned char *src,
volatile unsigned char *dst, int page_size)
{
int i;
/* Issue JEDEC Data Unprotect comand */
*(volatile char *) (bios + 0x5555) = 0xAA;
*(volatile char *) (bios + 0x2AAA) = 0x55;
*(volatile char *) (bios + 0x5555) = 0xA0;
*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
*(volatile unsigned char *) (bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
for (i = 0; i < page_size; i++) {
/* transfer data from source to destination */
/* If the data is 0xFF, don't program it */
if (*src == 0xFF)
continue;
*dst++ = *src++;
}
usleep(100);
toggle_ready_jedec(dst - 1);
return 0;
}
int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src,
volatile unsigned char *dst)
{
volatile unsigned char *Temp;
/* transfer data from source to destination */
/* If the data is 0xFF, don't program it */
if (*src == 0xFF) {
/* If the data is 0xFF, don't program it */
return 0;
}
/* Issue JEDEC Byte Program command */
Temp = bios + 0x5555;
*Temp = 0xAA;
Temp = bios + 0x2AAA;
*Temp = 0x55;
Temp = bios + 0x5555;
*Temp = 0xA0;
*(volatile unsigned char *) (bios + 0x5555) = 0xAA;
*(volatile unsigned char *) (bios + 0x2AAA) = 0x55;
*(volatile unsigned char *) (bios + 0x5555) = 0xA0;
/* transfer data from source to destination */
*dst = *src;
toggle_ready_jedec(bios);
return 0;