diff options
Diffstat (limited to 'util/flashrom/jedec.h')
| -rw-r--r-- | util/flashrom/jedec.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/util/flashrom/jedec.h b/util/flashrom/jedec.h new file mode 100644 index 0000000000..2a9f977711 --- /dev/null +++ b/util/flashrom/jedec.h @@ -0,0 +1,67 @@ +#ifndef __JEDEC_H__ +#define __JEDEC_H__ 1 +int write_byte_program_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst); + +extern int probe_jedec(struct flashchip *flash); +extern int erase_chip_jedec(struct flashchip *flash); +extern int write_jedec(struct flashchip *flash, unsigned char *buf); +extern int erase_sector_jedec(volatile unsigned char *bios, unsigned int page); +extern int erase_block_jedec(volatile unsigned char *bios, unsigned int page); +extern int write_sector_jedec(volatile unsigned char *bios, unsigned char *src, + volatile unsigned char *dst, + unsigned int page_size); + +extern __inline__ void toggle_ready_jedec(volatile char *dst) +{ + unsigned int i = 0; + char tmp1, tmp2; + + tmp1 = *dst & 0x40; + + while (i++ < 0xFFFFFFF) { + tmp2 = *dst & 0x40; + if (tmp1 == tmp2) { + break; + } + tmp1 = tmp2; + } +} + +extern __inline__ void data_polling_jedec(volatile char *dst, char data) +{ + unsigned int i = 0; + char tmp; + + data &= 0x80; + + while (i++ < 0xFFFFFFF) { + tmp = *dst & 0x80; + if (tmp == data) { + break; + } + } +} + +extern __inline__ void unprotect_jedec(volatile char *bios) +{ + *(volatile char *) (bios + 0x5555) = 0xAA; + *(volatile char *) (bios + 0x2AAA) = 0x55; + *(volatile char *) (bios + 0x5555) = 0x80; + *(volatile char *) (bios + 0x5555) = 0xAA; + *(volatile char *) (bios + 0x2AAA) = 0x55; + *(volatile char *) (bios + 0x5555) = 0x20; + + usleep(200); +} + +extern __inline__ void protect_jedec(volatile char *bios) +{ + *(volatile char *) (bios + 0x5555) = 0xAA; + *(volatile char *) (bios + 0x2AAA) = 0x55; + *(volatile char *) (bios + 0x5555) = 0xA0; + + usleep(200); +} + +#endif /* !__JEDEC_H__ */ |