Trying to make this general purpose user-land flash burner
Corresponding to coreboot v1 svn r489.
diff --git a/jedec.h b/jedec.h
new file mode 100644
index 0000000..de9c3d6
--- /dev/null
+++ b/jedec.h
@@ -0,0 +1,61 @@
+extern int probe_jedec (struct flashchip * flash);
+extern int erase_jedec (struct flashchip * flash);
+extern int write_jedec (struct flashchip * flash, char * buf);
+
+extern __inline__ void toggle_ready_jedec (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 (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 (char * bios)
+{
+ *(char *) (bios + 0x5555) = 0xAA;
+ *(char *) (bios + 0x2AAA) = 0x55;
+ *(char *) (bios + 0x5555) = 0xA0;
+
+ usleep(200);
+}
+
+extern __inline__ void write_page_jedec (char * bios, char * src, char * dst,
+ int page_size)
+{
+ int i;
+
+ *(char *) (bios + 0x5555) = 0xAA;
+ *(char *) (bios + 0x2AAA) = 0x55;
+ *(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);
+}