diff options
Diffstat (limited to 'util/flash_and_burn/sst28sf040.c')
| -rw-r--r-- | util/flash_and_burn/sst28sf040.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/util/flash_and_burn/sst28sf040.c b/util/flash_and_burn/sst28sf040.c deleted file mode 100644 index 1853f156b0..0000000000 --- a/util/flash_and_burn/sst28sf040.c +++ /dev/null @@ -1,173 +0,0 @@ -/* - * sst28sf040.c: driver for SST28SF040C 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: - * 4 MEgabit (512K x 8) SuperFlash EEPROM, SST28SF040 data sheet - * - * $Id$ - */ - -#include <stdio.h> -#include "flash.h" -#include "jedec.h" - -#define AUTO_PG_ERASE1 0x20 -#define AUTO_PG_ERASE2 0xD0 -#define AUTO_PGRM 0x10 -#define CHIP_ERASE 0x30 -#define RESET 0xFF -#define READ_ID 0x90 - -static __inline__ void protect_28sf040(volatile char *bios) -{ - /* ask compiler not to optimize this */ - volatile unsigned char tmp; - - tmp = *(volatile unsigned char *) (bios + 0x1823); - tmp = *(volatile unsigned char *) (bios + 0x1820); - tmp = *(volatile unsigned char *) (bios + 0x1822); - tmp = *(volatile unsigned char *) (bios + 0x0418); - tmp = *(volatile unsigned char *) (bios + 0x041B); - tmp = *(volatile unsigned char *) (bios + 0x0419); - tmp = *(volatile unsigned char *) (bios + 0x040A); -} - -static __inline__ void unprotect_28sf040(volatile char *bios) -{ - /* ask compiler not to optimize this */ - volatile unsigned char tmp; - - tmp = *(volatile unsigned char *) (bios + 0x1823); - tmp = *(volatile unsigned char *) (bios + 0x1820); - tmp = *(volatile unsigned char *) (bios + 0x1822); - tmp = *(volatile unsigned char *) (bios + 0x0418); - tmp = *(volatile unsigned char *) (bios + 0x041B); - tmp = *(volatile unsigned char *) (bios + 0x0419); - tmp = *(volatile unsigned char *) (bios + 0x041A); -} - -static __inline__ int erase_sector_28sf040(volatile char *bios, - unsigned long address) -{ - *bios = AUTO_PG_ERASE1; - *(bios + address) = AUTO_PG_ERASE2; - - /* wait for Toggle bit ready */ - toggle_ready_jedec(bios); - - return (0); -} - -static __inline__ int write_sector_28sf040(volatile char *bios, - unsigned char *src, - volatile unsigned char *dst, - unsigned int page_size) -{ - int i; - - for (i = 0; i < page_size; i++) { - /* transfer data from source to destination */ - if (*src == 0xFF) { - dst++, src++; - /* If the data is 0xFF, don't program it */ - continue; - } - /*issue AUTO PROGRAM command */ - *dst = AUTO_PGRM; - *dst++ = *src++; - - /* wait for Toggle bit ready */ - toggle_ready_jedec(bios); - } - - return (0); -} - -int probe_28sf040(struct flashchip *flash) -{ - volatile char *bios = flash->virt_addr; - unsigned char id1, id2, tmp; - - /* save the value at the beginning of the Flash */ - tmp = *bios; - - *bios = RESET; - myusec_delay(10); - - *bios = READ_ID; - myusec_delay(10); - id1 = *(volatile unsigned char *) bios; - myusec_delay(10); - id2 = *(volatile unsigned char *) (bios + 0x01); - - *bios = RESET; - myusec_delay(10); - - printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2); - if (id1 == flash->manufacture_id && id2 == flash->model_id) - return 1; - - /* if there is no SST28SF040, restore the original value */ - *bios = tmp; - return 0; -} - -int erase_28sf040(struct flashchip *flash) -{ - volatile char *bios = flash->virt_addr; - - unprotect_28sf040(bios); - *bios = CHIP_ERASE; - *bios = CHIP_ERASE; - protect_28sf040(bios); - - myusec_delay(10); - toggle_ready_jedec(bios); - - return (0); -} - -int write_28sf040(struct flashchip *flash, unsigned char *buf) -{ - int i; - int total_size = flash->total_size * 1024, page_size = - flash->page_size; - volatile char *bios = flash->virt_addr; - - unprotect_28sf040(bios); - - printf("Programming Page: "); - for (i = 0; i < total_size / page_size; i++) { - /* erase the page before programming */ - erase_sector_28sf040(bios, i * page_size); - - /* write to the sector */ - printf("%04d at address: 0x%08x", i, i * page_size); - write_sector_28sf040(bios, buf + i * page_size, - bios + i * page_size, page_size); - printf("\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"); - } - printf("\n"); - - protect_28sf040(bios); - - return (0); -} |