Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 1 | /* |
| 2 | * w49f002u.c: driver for Winbond 49F002U flash models |
| 3 | * |
| 4 | * |
| 5 | * Copyright 2000 Silicon Integrated System Corporation |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | * |
| 21 | * |
| 22 | * Reference: |
| 23 | * W49F002U data sheet |
| 24 | * |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 25 | * $Id$ |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 26 | */ |
| 27 | |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 28 | #include <stdio.h> |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 29 | #include "flash.h" |
| 30 | #include "jedec.h" |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 31 | #include "w49f002u.h" |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 32 | |
| 33 | int probe_49f002 (struct flashchip * flash) |
| 34 | { |
| 35 | volatile char * bios = flash->virt_addr; |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 36 | unsigned char id1, id2; |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 37 | |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 38 | *(volatile char *) (bios + 0x5555) = 0xAA; |
| 39 | *(volatile char *) (bios + 0x2AAA) = 0x55; |
| 40 | *(volatile char *) (bios + 0x5555) = 0x90; |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 41 | |
| 42 | id1 = *(volatile unsigned char *) bios; |
| 43 | id2 = *(volatile unsigned char *) (bios + 0x01); |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 44 | |
| 45 | *(volatile char *) (bios + 0x5555) = 0xAA; |
| 46 | *(volatile char *) (bios + 0x2AAA) = 0x55; |
| 47 | *(volatile char *) (bios + 0x5555) = 0xF0; |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 48 | |
| 49 | myusec_delay(10); |
| 50 | |
Ronald G. Minnich | d4228fd | 2003-02-28 17:21:38 +0000 | [diff] [blame] | 51 | printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); |
| 52 | |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 53 | if (id1 == flash->manufacture_id && id2 == flash->model_id) |
| 54 | return 1; |
| 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | int erase_49f002 (struct flashchip * flash) |
| 60 | { |
| 61 | volatile char * bios = flash->virt_addr; |
| 62 | |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 63 | *(bios + 0x5555) = 0xAA; |
| 64 | *(bios + 0x2AAA) = 0x55; |
| 65 | *(bios + 0x5555) = 0x80; |
| 66 | *(bios + 0x5555) = 0xAA; |
| 67 | *(bios + 0x2AAA) = 0x55; |
| 68 | *(bios + 0x5555) = 0x10; |
| 69 | |
| 70 | myusec_delay(100); |
| 71 | toggle_ready_jedec(bios); |
| 72 | |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 73 | return(0); |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 74 | } |
| 75 | |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 76 | int write_49f002 (struct flashchip * flash, unsigned char * buf) |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 77 | { |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 78 | int i; |
| 79 | int total_size = flash->total_size * 1024; |
| 80 | volatile char * bios = flash->virt_addr; |
| 81 | volatile char * dst = bios; |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 82 | |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 83 | myusec_delay(10); |
| 84 | erase_49f002(flash); |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 85 | |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 86 | printf ("Programming Page: "); |
| 87 | for (i = 0; i < total_size; i++) { |
| 88 | /* write to the sector */ |
| 89 | if ((i & 0xfff) == 0) |
| 90 | printf ("address: 0x%08lx", (unsigned long)i); |
| 91 | *(bios + 0x5555) = 0xAA; |
| 92 | *(bios + 0x2AAA) = 0x55; |
| 93 | *(bios + 0x5555) = 0xA0; |
| 94 | *dst++ = *buf++; |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 95 | |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 96 | /* wait for Toggle bit ready */ |
| 97 | toggle_ready_jedec(dst); |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 98 | |
Ollie Lho | cec2879 | 2004-03-17 23:03:37 +0000 | [diff] [blame^] | 99 | if ((i & 0xfff) == 0) |
| 100 | printf ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 101 | } |
| 102 | printf("\n"); |
| 103 | |
| 104 | return(0); |
Andrew Ip | f0126ce | 2002-10-16 06:58:05 +0000 | [diff] [blame] | 105 | } |