Activate proper support for EN29F002(A)(N)[BT]
Fully tested for Probe/Read/Erase/Write on EN29F002NT.
Jedec subroutines 'probe_jedec()' and 'erase_chip_jedec()'
are still in use, but a tailored 'write_en29f002a()' is
needed due to a byte wise writing mechanism for this chip.
Corresponding to flashrom svn r316 and coreboot v2 svn r3602.
Signed-off-by: Mats Erik Andersson <mats.andersson@gisladisker.se>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/en29f002a.c b/en29f002a.c
index e2b4f9b..904b58b 100644
--- a/en29f002a.c
+++ b/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 @@
}
/*
- 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 @@
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;
+}