Use common jedec functionality where appropriate

The deleted function in en29f002a.c is reintroduced as
write_by_byte_jedec in jedec.c as it contains no chip-specific
instructions. It is not yet used in other chip drivers, as key addresses
(0x2AAA/0x5555) are often specified with less bits. After crosschecking
datasheets, most of the fixmes can probably be resolved as indicated in
them, causing significant code reduction.

The common JEDEC code for bytewise programming does not program 0xFF
at all. The chips that had a dedicated bytewise flash function which
has been changed to write_jedec_1 thus changed flashing behaviour
and the "write" test flag has been removed. This applies to: AMD
Am29F002BB/Am29F002NBB AMD Am29F002BT/Am29F002NBT (TEST_OK_PREW before)
AMIC A29002B AMIC A29002T (TEST_OK_PREW before) EON EN29F002(A)(N)B EON
EN29F002(A)(N)T (TEST_OK_PREW before) Macronix MX29F001B (TEST_OK_PREW
before) Macronix MX29F001T (TEST_OK_PREW before) Macronix MX29F002B
Macronix MX29F002T (TEST_OK_PREW before) Macronix MX29LV040

Similar analysis should be performed for the read id stuff.

Corresponding to flashrom svn r785.

Signed-off-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
Acked-by: Sean Nelson <audiohacked@gmail.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

1 files changed, 3 insertions, 34 deletions

diff --git a/mx29f002.c b/mx29f002.c
index f170360..7838c3d 100644
--- a/mx29f002.c
+++ b/mx29f002.c
@@ -43,6 +43,9 @@ int probe_29f002(struct flashchip *flash)
 	return 0;
 }
 
+/* FIXME: Use erase_chip_jedec?
+ * erase_29f002 uses shorter addresses, sends F0 (exit ID mode) and
+ * and has a bigger delay before polling the toggle bit */
 int erase_29f002(struct flashchip *flash)
 {
 	chipaddr bios = flash->virtual_memory;
@@ -64,37 +67,3 @@ int erase_29f002(struct flashchip *flash)
 	}
 	return 0;
 }
-
-int write_29f002(struct flashchip *flash, uint8_t *buf)
-{
-	int i;
-	int total_size = flash->total_size * 1024;
-	chipaddr bios = flash->virtual_memory;
-	chipaddr dst = bios;
-
-	chip_writeb(0xF0, bios);
-	programmer_delay(10);
-	if (erase_29f002(flash)) {
-		fprintf(stderr, "ERASE FAILED!\n");
-		return -1;
-	}
-	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);
-		chip_writeb(0xAA, bios + 0x5555);
-		chip_writeb(0x55, bios + 0x2AAA);
-		chip_writeb(0xA0, bios + 0x5555);
-		chip_writeb(*buf++, dst++);
-
-		/* 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;
-}