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

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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>
This commit is contained in:
Mats Erik Andersson
2008-09-26 13:19:02 +00:00
committed by Uwe Hermann
parent 3d20d901ec
commit 44e1a19467
4 changed files with 54 additions and 10 deletions
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53
en29f002a.c
View File

@ -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;
}