2007-01-22 21:21:17 +01:00
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/*
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* 49lfxxxc.c: driver for SST49LFXXXC flash models.
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*
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*
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* Copyright 2000 Silicon Integrated System Corporation
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2007-05-24 11:26:39 +02:00
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* Copyright 2005-2007 coresystems GmbH
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2007-01-22 21:21:17 +01:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Reference:
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* SST49LFxxxC data sheets
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*
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "flash.h"
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#define SECTOR_ERASE 0x30
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#define BLOCK_ERASE 0x20
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#define ERASE 0xD0
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#define AUTO_PGRM 0x10
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#define RESET 0xFF
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#define READ_ID 0x90
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#define READ_STATUS 0x70
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#define CLEAR_STATUS 0x50
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#define STATUS_BPS (1 << 1)
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#define STATUS_ESS (1 << 6)
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#define STATUS_WSMS (1 << 7)
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static __inline__ int write_lockbits_49lfxxxc(volatile uint8_t *bios, int size,
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2007-05-09 12:17:44 +02:00
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unsigned char bits)
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2007-01-22 21:21:17 +01:00
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{
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int i, left = size;
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unsigned long address;
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//printf("bios=0x%08lx\n", (unsigned long)bios);
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for (i = 0; left > 65536; i++, left -= 65536) {
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//printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFC00000 - size + (i * 65536) + 2, *(bios + (i * 65536) + 2) );
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*(bios + (i * 65536) + 2) = bits;
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}
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address = i * 65536;
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2007-05-09 12:17:44 +02:00
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//printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
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2007-01-22 21:21:17 +01:00
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*(bios + address + 2) = bits;
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address += 32768;
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2007-05-09 12:17:44 +02:00
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//printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
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2007-01-22 21:21:17 +01:00
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*(bios + address + 2) = bits;
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address += 8192;
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2007-05-09 12:17:44 +02:00
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//printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
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2007-01-22 21:21:17 +01:00
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*(bios + address + 2) = bits;
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address += 8192;
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2007-05-09 12:17:44 +02:00
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//printf("lockbits at address=0x%08lx is 0x%01x\n", (unsigned long)0xFFc00000 - size + address + 2, *(bios + address + 2) );
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2007-01-22 21:21:17 +01:00
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*(bios + address + 2) = bits;
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2007-08-23 18:08:21 +02:00
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return 0;
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2007-01-22 21:21:17 +01:00
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}
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static __inline__ int erase_sector_49lfxxxc(volatile uint8_t *bios,
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2007-05-09 12:17:44 +02:00
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unsigned long address)
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2007-01-22 21:21:17 +01:00
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{
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unsigned char status;
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*bios = SECTOR_ERASE;
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*(bios + address) = ERASE;
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do {
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2007-05-09 12:17:44 +02:00
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status = *bios;
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2007-01-22 21:21:17 +01:00
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if (status & (STATUS_ESS | STATUS_BPS)) {
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2007-05-09 12:17:44 +02:00
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printf("sector erase FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)bios + address, status);
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2007-01-22 21:21:17 +01:00
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*bios = CLEAR_STATUS;
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2007-05-09 12:17:44 +02:00
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return (-1);
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2007-01-22 21:21:17 +01:00
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}
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2007-05-09 12:17:44 +02:00
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} while (!(status & STATUS_WSMS));
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2007-01-22 21:21:17 +01:00
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2007-08-23 18:08:21 +02:00
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return 0;
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2007-01-22 21:21:17 +01:00
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}
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static __inline__ int write_sector_49lfxxxc(volatile uint8_t *bios,
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2007-05-09 12:17:44 +02:00
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uint8_t *src,
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volatile uint8_t *dst,
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unsigned int page_size)
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2007-01-22 21:21:17 +01:00
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{
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int i;
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unsigned char status;
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*bios = CLEAR_STATUS;
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for (i = 0; i < page_size; i++) {
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/* transfer data from source to destination */
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if (*src == 0xFF) {
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dst++, src++;
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/* If the data is 0xFF, don't program it */
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continue;
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}
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/*issue AUTO PROGRAM command */
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*bios = AUTO_PGRM;
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*dst++ = *src++;
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do {
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status = *bios;
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if (status & (STATUS_ESS | STATUS_BPS)) {
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2007-05-09 12:17:44 +02:00
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printf("sector write FAILED at address=0x%08lx status=0x%01x\n", (unsigned long)dst, status);
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2007-01-22 21:21:17 +01:00
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*bios = CLEAR_STATUS;
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2007-05-09 12:17:44 +02:00
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return (-1);
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2007-01-22 21:21:17 +01:00
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}
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} while (!(status & STATUS_WSMS));
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}
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2007-08-23 18:08:21 +02:00
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return 0;
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2007-01-22 21:21:17 +01:00
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}
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int probe_49lfxxxc(struct flashchip *flash)
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{
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2007-05-23 19:20:56 +02:00
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volatile uint8_t *bios = flash->virtual_memory;
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2007-01-22 21:21:17 +01:00
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uint8_t id1, id2;
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*bios = RESET;
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*bios = READ_ID;
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2007-05-09 12:17:44 +02:00
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id1 = *(volatile uint8_t *)bios;
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id2 = *(volatile uint8_t *)(bios + 0x01);
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2007-01-22 21:21:17 +01:00
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*bios = RESET;
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printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
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2007-05-24 10:48:10 +02:00
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2007-01-22 21:21:17 +01:00
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if (!(id1 == flash->manufacture_id && id2 == flash->model_id))
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return 0;
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2007-05-24 10:48:10 +02:00
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map_flash_registers(flash);
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2007-01-22 21:21:17 +01:00
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return 1;
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}
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int erase_49lfxxxc(struct flashchip *flash)
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{
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2007-05-23 19:20:56 +02:00
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volatile uint8_t *bios = flash->virtual_memory;
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volatile uint8_t *registers = flash->virtual_registers;
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2007-01-22 21:21:17 +01:00
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int i;
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unsigned int total_size = flash->total_size * 1024;
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2007-05-23 19:20:56 +02:00
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write_lockbits_49lfxxxc(registers, total_size, 0);
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2007-01-22 21:21:17 +01:00
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for (i = 0; i < total_size; i += flash->page_size)
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2007-05-09 12:17:44 +02:00
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if (erase_sector_49lfxxxc(bios, i) != 0)
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return (-1);
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2007-01-22 21:21:17 +01:00
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*bios = RESET;
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2007-08-23 18:08:21 +02:00
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return 0;
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2007-01-22 21:21:17 +01:00
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}
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int write_49lfxxxc(struct flashchip *flash, uint8_t *buf)
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{
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int i;
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2007-05-09 12:17:44 +02:00
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int total_size = flash->total_size * 1024;
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int page_size = flash->page_size;
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2007-05-23 19:20:56 +02:00
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volatile uint8_t *bios = flash->virtual_memory;
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2007-01-22 21:21:17 +01:00
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2007-05-23 19:20:56 +02:00
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write_lockbits_49lfxxxc(flash->virtual_registers, total_size, 0);
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2007-01-22 21:21:17 +01:00
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printf("Programming Page: ");
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for (i = 0; i < total_size / page_size; i++) {
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/* erase the page before programming */
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erase_sector_49lfxxxc(bios, i * page_size);
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/* write to the sector */
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printf("%04d at address: 0x%08x", i, i * page_size);
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write_sector_49lfxxxc(bios, buf + i * page_size,
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2007-05-09 12:17:44 +02:00
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bios + i * page_size, page_size);
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2007-01-22 21:21:17 +01:00
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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");
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}
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printf("\n");
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*bios = RESET;
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2007-08-23 18:08:21 +02:00
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return 0;
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2007-01-22 21:21:17 +01:00
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}
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