diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | flash.h | 5 | ||||
| -rw-r--r-- | flash_rom.c | 2 | ||||
| -rw-r--r-- | w49f002u.c | 112 |
4 files changed, 121 insertions, 1 deletions
@@ -1,4 +1,5 @@ -OBJS = jedec.o sst28sf040.o am29f040b.o mx29f002.c sst39sf020.o m29f400bt.o +OBJS = jedec.o sst28sf040.o am29f040b.o mx29f002.c sst39sf020.o m29f400bt.o \ + w49f002u.o OBJS += 82802ab.o CC = gcc -O2 -g @@ -34,6 +34,7 @@ struct flashchip { #define WINBOND_ID 0xDA /* Winbond Manufacture ID code */ #define W_29C020C 0x45 /* Winbond w29c020c device code*/ +#define W_49F002U 0x0B /* Winbond w29c020c device code*/ #define ST_ID 0x20 #define ST_M29F400BT 0xD5 @@ -53,3 +54,7 @@ extern int write_29f040b (struct flashchip * flash, char * buf); extern int probe_29f002 (struct flashchip * flash); extern int erase_29f002 (struct flashchip * flash); extern int write_29f002 (struct flashchip * flash, char * buf); + +extern int probe_49f002 (struct flashchip * flash); +extern int erase_49f002 (struct flashchip * flash); +extern int write_49f002 (struct flashchip * flash, char * buf); diff --git a/flash_rom.c b/flash_rom.c index 85a016a1..08841f6d 100644 --- a/flash_rom.c +++ b/flash_rom.c @@ -55,6 +55,8 @@ struct flashchip flashchips[] = { probe_39sf020, erase_39sf020, write_39sf020}, {"W29C020C", WINBOND_ID, W_29C020C, NULL, 256, 128, probe_jedec, erase_jedec, write_jedec}, + {"W49F002U", WINBOND_ID, W_49F002U, NULL, 256, 128, + probe_49f002, erase_49f002, write_49f002}, {"M29F400BT", ST_ID, ST_M29F400BT , NULL, 512, 64*1024, probe_m29f400bt, erase_m29f400bt, write_linuxbios_m29f400bt}, {"82802ab", 137, 173 , NULL, 512, 64*1024, diff --git a/w49f002u.c b/w49f002u.c new file mode 100644 index 00000000..887a15b3 --- /dev/null +++ b/w49f002u.c @@ -0,0 +1,112 @@ +/* + * w49f002u.c: driver for Winbond 49F002U flash models + * + * + * Copyright 2000 Silicon Integrated System Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * Reference: + * W49F002U data sheet + * + * $Id + */ + +#include "flash.h" +#include "jedec.h" + +int probe_49f002 (struct flashchip * flash) +{ + volatile char * bios = flash->virt_addr; + unsigned char id1, id2, id3; + + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0x90; + + id1 = *(volatile unsigned char *) bios; + id2 = *(volatile unsigned char *) (bios + 0x01); + + *bios = 0xF0; + + myusec_delay(10); + + printf(__FUNCTION__ "id1 %d, id2 %d\n", id1, id2); + if (id1 == flash->manufacture_id && id2 == flash->model_id) + return 1; + + return 0; +} + +int erase_49f002 (struct flashchip * flash) +{ + volatile char * bios = flash->virt_addr; + + again: + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0x80; + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0x10; + + myusec_delay(100); + toggle_ready_jedec(bios); + + // while ((*bios & 0x40) != 0x40) + //; + +#if 0 + toggle_ready_jedec(bios); + *(bios + 0x0ffff) = 0x30; + *(bios + 0x1ffff) = 0x30; + *(bios + 0x2ffff) = 0x30; + *(bios + 0x37fff) = 0x30; + *(bios + 0x39fff) = 0x30; + *(bios + 0x3bfff) = 0x30; +#endif + +} + +int write_49f002 (struct flashchip * flash, char * buf) +{ + int i; + int total_size = flash->total_size * 1024, page_size = flash->page_size; + volatile char * bios = flash->virt_addr; + volatile char * dst = bios, * src = buf; + + *bios = 0xF0; + myusec_delay(10); + erase_49f002(flash); + //*bios = 0xF0; +#if 1 + printf ("Programming Page: "); + for (i = 0; i < total_size; i++) { + /* write to the sector */ + printf ("address: 0x%08lx", i); + *(bios + 0x5555) = 0xAA; + *(bios + 0x2AAA) = 0x55; + *(bios + 0x5555) = 0xA0; + *dst++ = *buf++; + + /* wait for Toggle bit ready */ + toggle_ready_jedec(dst); + + printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); + } +#endif + printf("\n"); +} |