Activate proper support for EN29F002(A)(N)[BT].

[coreboot.git] / util / flashrom / en29f002a.c

diff --git a/util/flashrom/en29f002a.c b/util/flashrom/en29f002a.c
index e2b4f9b09bb4b1eb8c7dbea41df189ca2365f9fe..904b58b81917dd04407af1a65c018e6b99374ac7 100644 (file)
--- a/util/flashrom/en29f002a.c
+++ b/util/flashrom/en29f002a.c
@@ -19,12 +19,17 @@
  */
 
 /*
-   EN29F512 has 1C,21
-   EN29F010 has 1C,20
-   EN29F040A has 1C,04
-   EN29LV010 has 1C,6E and uses short F0 reset sequence
-   EN29LV040(A) has 1C,4F and uses short F0 reset sequence
+ * EN29F512 has 1C,21
+ * EN29F010 has 1C,20
+ * EN29F040A has 1C,04
+ * EN29LV010 has 1C,6E and uses short F0 reset sequence
+ * EN29LV040(A) has 1C,4F and uses short F0 reset sequence
  */
+
+#include <stdio.h>
+#include <stdint.h>
+#include "flash.h"
+
 int probe_en29f512(struct flashchip *flash)
 {
        volatile uint8_t *bios = flash->virtual_memory;
@@ -53,9 +58,11 @@ int probe_en29f512(struct flashchip *flash)
 }
 
 /*
-   EN29F002AT has 1C,92
-   EN29F002AB has 1C,97
+ * EN29F002AT has 1C,92
+ * EN29F002AB has 1C,97
  */
+
+/* This does not seem to function properly for EN29F002NT. */
 int probe_en29f002a(struct flashchip *flash)
 {
        volatile uint8_t *bios = flash->virtual_memory;
@@ -83,3 +90,35 @@ int probe_en29f002a(struct flashchip *flash)
        return 0;
 }
 
+/* The EN29F002 chip needs repeated single byte writing, no block writing. */
+int write_en29f002a(struct flashchip *flash, uint8_t *buf)
+{
+       int i;
+       int total_size = flash->total_size * 1024;
+       volatile uint8_t *bios = flash->virtual_memory;
+       volatile uint8_t *dst = bios;
+
+       // *bios = 0xF0;
+       myusec_delay(10);
+       erase_chip_jedec(flash);
+
+       printf("Programming page: ");
+       for (i = 0; i < total_size; i++) {
+               /* write to the sector */
+               if ((i & 0xfff) == 0)
+                       printf("address: 0x%08lx", (unsigned long)i);
+               *(bios + 0x5555) = 0xAA;
+               *(bios + 0x2AAA) = 0x55;
+               *(bios + 0x5555) = 0xA0;
+               *dst++ = *buf++;
+
+               /* wait for Toggle bit ready */
+               toggle_ready_jedec(dst);
+
+               if ((i & 0xfff) == 0)
+                       printf("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
+       }
+
+       printf("\n");
+       return 0;
+}