Changeset 3602

Timestamp:

09/26/08 15:19:02 (3 months ago)

Author:

uwe

Message:

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.

Signed-off-by: Mats Erik Andersson <mats.andersson@…>
Acked-by: Uwe Hermann <uwe@…>

Location:

trunk/util/flashrom

Files:

• Makefile (modified) (1 diff)
• en29f002a.c (modified) (3 diffs)
• flash.h (modified) (1 diff)
• flashchips.c (modified) (1 diff)

trunk/util/flashrom/Makefile

@@ -27 +27 @@
 OBJS = chipset_enable.o board_enable.o udelay.o jedec.o stm50flw0x0x.o \
         sst28sf040.o am29f040b.o mx29f002.o sst39sf020.o m29f400bt.o \
-        w49f002u.o 82802ab.o pm49fl00x.o sst49lf040.o \
+        w49f002u.o 82802ab.o pm49fl00x.o sst49lf040.o en29f002a.o \
         sst49lfxxxc.o sst_fwhub.o layout.o cbtable.o flashchips.o \
         flashrom.o w39v080fa.o sharplhf00l04.o w29ee011.o spi.o it87spi.o \

trunk/util/flashrom/en29f002a.c

@@ -20 +20 @@
 
 /*
-   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)
 {
@@ -54 +59 @@
 
 /*
-   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)
 {
@@ -84 +91 @@
 }
 
+/* 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;
+}

trunk/util/flashrom/flash.h

@@ -436 +436 @@
 int write_29f040b(struct flashchip *flash, uint8_t *buf);
 
+/* en29f002a.c */
+int probe_en29f002a(struct flashchip *flash);
+int erase_en29f002a(struct flashchip *flash);
+int write_en29f002a(struct flashchip *flash, uint8_t *buf);
+
 /* ichspi.c */
 int ich_spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr);

trunk/util/flashrom/flashchips.c

@@ -48 +48 @@
         {"AMIC",        "A49LF040A",            AMIC_ID_NOPREFIX, AMIC_A49LF040A,       512,    64 * 1024,      TEST_OK_PREW,   probe_49fl00x,          erase_49fl00x,                  write_49fl00x},
         {"EMST",        "F49B002UA",            EMST_ID,        EMST_F49B002UA,         256,    4096,           TEST_UNTESTED,  probe_jedec,            erase_chip_jedec,               write_49f002},
-        {"EON",         "EN29F002(A)(N)B",      EON_ID,         EN_29F002B,             256,    256,            TEST_UNTESTED,  probe_jedec,            erase_chip_jedec,               write_jedec},
-        {"EON",         "EN29F002(A)(N)T",      EON_ID,         EN_29F002T,             256,    256,            TEST_UNTESTED,  probe_jedec,            erase_chip_jedec,               write_jedec},
+        {"EON",         "EN29F002(A)(N)B",      EON_ID,         EN_29F002B,             256,    256,            TEST_UNTESTED,  probe_jedec,            erase_chip_jedec,               write_en29f002a},
+        {"EON",         "EN29F002(A)(N)T",      EON_ID,         EN_29F002T,             256,    256,            TEST_OK_PREW,   probe_jedec,            erase_chip_jedec,               write_en29f002a},
         {"Fujitsu",     "MBM29F400TC",          FUJITSU_ID,     MBM29F400TC_STRANGE,    512,    64 * 1024,      TEST_UNTESTED,  probe_m29f400bt,        erase_m29f400bt,                write_coreboot_m29f400bt},
         {"Intel",       "82802AB",              INTEL_ID,       173,                    512,    64 * 1024,      TEST_OK_PREW,   probe_82802ab,          erase_82802ab,                  write_82802ab},