diff options
Diffstat (limited to 'util/flash_and_burn/jedec.h')
| -rw-r--r-- | util/flash_and_burn/jedec.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/util/flash_and_burn/jedec.h b/util/flash_and_burn/jedec.h new file mode 100644 index 0000000000..40261fd4fd --- /dev/null +++ b/util/flash_and_burn/jedec.h @@ -0,0 +1,66 @@ +#ifndef __JEDEC_H__ +#define __JEDEC_H__ 1 + +extern int probe_jedec (struct flashchip * flash); +extern int erase_jedec (struct flashchip * flash); +extern int write_jedec (struct flashchip * flash, unsigned char * buf); + +extern __inline__ void toggle_ready_jedec (volatile char * dst) +{ + unsigned int i = 0; + char tmp1, tmp2; + + tmp1 = *dst & 0x40; + + while (i++ < 0xFFFFFF) { + 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++ < 0xFFFFFF) { + tmp = *dst & 0x80; + if (tmp == data) { + break; + } + } +} + +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); +} + +extern __inline__ void write_page_jedec (volatile char * bios, char * src, volatile char * dst, + int page_size) +{ + int i; + + *(volatile char *) (bios + 0x5555) = 0xAA; + *(volatile char *) (bios + 0x2AAA) = 0x55; + *(volatile char *) (bios + 0x5555) = 0xA0; + + for (i = 0; i < page_size; i++) { + /* transfer data from source to destination */ + *dst++ = *src++; + } + + usleep(100); + toggle_ready_jedec(dst-1); +} + +#endif /* !__JEDEC_H__ */ |