diff options
Diffstat (limited to 'm29f400bt.h')
-rw-r--r-- | m29f400bt.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/m29f400bt.h b/m29f400bt.h new file mode 100644 index 000000000..a6458709e --- /dev/null +++ b/m29f400bt.h @@ -0,0 +1,67 @@ +extern int probe_m29f400bt (struct flashchip * flash); +extern int erase_m29f400bt (struct flashchip * flash); +extern int block_erase_m29f400bt (volatile char * bios, volatile char * dst); +extern int write_m29f400bt (struct flashchip * flash, char * buf); +extern int write_linuxbios_m29f400bt (struct flashchip * flash, char * buf); + +extern __inline__ void toggle_ready_m29f400bt (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_m29f400bt (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_m29f400bt (volatile char * bios) +{ + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0xA0; + + usleep(200); +} + +extern __inline__ void write_page_m29f400bt (volatile char * bios, char * src, volatile char * dst, + int page_size) +{ + int i; + + for (i = 0; i < page_size; i++) { + *(volatile char *) (bios + 0xAAA) = 0xAA; + *(volatile char *) (bios + 0x555) = 0x55; + *(volatile char *) (bios + 0xAAA) = 0xA0; + + /* transfer data from source to destination */ + *dst = *src; + //*(volatile char *) (bios) = 0xF0; + //usleep(5); + toggle_ready_m29f400bt(dst); + printf("Value in the flash at address %p = %#x, want %#x\n",dst-bios, *dst, *src); + dst++; + src++; + } + +} |