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-rw-r--r--m29f400bt.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/m29f400bt.h b/m29f400bt.h
new file mode 100644
index 0000000..a645870
--- /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++;
+ }
+
+}
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