Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 1 | /* |
| 2 | * sst39sf020.c: driver for SST28SF040C 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 | * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST28SF040 data sheet |
| 24 | * |
Ollie Lho | cf29de8 | 2004-03-18 19:40:07 +0000 | [diff] [blame] | 25 | * ToDo: Consilidated to standard JEDEC code. |
| 26 | * |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 27 | * $Id$ |
| 28 | */ |
| 29 | |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 30 | #include <stdio.h> |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 31 | #include "flash.h" |
| 32 | #include "jedec.h" |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 33 | #include "sst39sf020.h" |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 34 | |
| 35 | #define AUTO_PG_ERASE1 0x20 |
| 36 | #define AUTO_PG_ERASE2 0xD0 |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 37 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 38 | static __inline__ int erase_sector_39sf020(volatile char *bios, |
| 39 | unsigned long address) |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 40 | { |
| 41 | *bios = AUTO_PG_ERASE1; |
| 42 | *(bios + address) = AUTO_PG_ERASE2; |
| 43 | |
| 44 | /* wait for Toggle bit ready */ |
| 45 | toggle_ready_jedec(bios); |
Ronald G. Minnich | eaab50b | 2003-09-12 22:41:53 +0000 | [diff] [blame] | 46 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 47 | return (0); |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 48 | } |
| 49 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 50 | int write_39sf020(struct flashchip *flash, unsigned char *buf) |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 51 | { |
| 52 | int i; |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 53 | int total_size = flash->total_size * 1024, page_size = |
| 54 | flash->page_size; |
| 55 | volatile char *bios = flash->virt_addr; |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 56 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 57 | erase_chip_jedec(flash); |
Ollie Lho | cf29de8 | 2004-03-18 19:40:07 +0000 | [diff] [blame] | 58 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 59 | printf("Programming Page: "); |
| 60 | for (i = 0; i < total_size / page_size; i++) { |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 61 | /* erase the page before programming */ |
| 62 | //erase_sector_39sf020(bios, i * page_size); |
| 63 | |
| 64 | /* write to the sector */ |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 65 | printf("%04d at address: 0x%08x", i, i * page_size); |
| 66 | write_sector_jedec(bios, buf + i * page_size, |
| 67 | bios + i * page_size, page_size); |
| 68 | printf |
| 69 | ("\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| 70 | fflush(stdout); |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 71 | } |
| 72 | printf("\n"); |
| 73 | |
Ollie Lho | 761bf1b | 2004-03-20 16:46:10 +0000 | [diff] [blame] | 74 | return (0); |
Ronald G. Minnich | 5e8dfff | 2002-03-21 22:41:11 +0000 | [diff] [blame] | 75 | } |