/*
- * sst28sf040.c: driver for SST28SF040C flash models.
+ * This file is part of the flashrom project.
*
+ * Copyright (C) 2000 Silicon Integrated System Corporation
+ * Copyright (C) 2005 coresystems GmbH <stepan@openbios.org>
*
- * 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 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.
*
- * 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
- *
- * $Id$
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
+#include <stdint.h>
#include "flash.h"
-#include "jedec.h"
#define AUTO_PG_ERASE1 0x20
#define AUTO_PG_ERASE2 0xD0
#define RESET 0xFF
#define READ_ID 0x90
-static __inline__ void protect_28sf040(volatile char *bios)
+static __inline__ void protect_28sf040(volatile uint8_t *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);
+ volatile uint8_t tmp;
+
+ tmp = *(volatile uint8_t *)(bios + 0x1823);
+ tmp = *(volatile uint8_t *)(bios + 0x1820);
+ tmp = *(volatile uint8_t *)(bios + 0x1822);
+ tmp = *(volatile uint8_t *)(bios + 0x0418);
+ tmp = *(volatile uint8_t *)(bios + 0x041B);
+ tmp = *(volatile uint8_t *)(bios + 0x0419);
+ tmp = *(volatile uint8_t *)(bios + 0x040A);
}
-static __inline__ void unprotect_28sf040(volatile char *bios)
+static __inline__ void unprotect_28sf040(volatile uint8_t *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);
+ volatile uint8_t tmp;
+
+ tmp = *(volatile uint8_t *)(bios + 0x1823);
+ tmp = *(volatile uint8_t *)(bios + 0x1820);
+ tmp = *(volatile uint8_t *)(bios + 0x1822);
+ tmp = *(volatile uint8_t *)(bios + 0x0418);
+ tmp = *(volatile uint8_t *)(bios + 0x041B);
+ tmp = *(volatile uint8_t *)(bios + 0x0419);
+ tmp = *(volatile uint8_t *)(bios + 0x041A);
}
-static __inline__ int erase_sector_28sf040(volatile char *bios,
+static __inline__ int erase_sector_28sf040(volatile uint8_t *bios,
unsigned long address)
{
*bios = AUTO_PG_ERASE1;
/* wait for Toggle bit ready */
toggle_ready_jedec(bios);
- return (0);
+ return 0;
}
-static __inline__ int write_sector_28sf040(volatile char *bios,
- unsigned char *src,
- volatile unsigned char *dst,
+static __inline__ int write_sector_28sf040(volatile uint8_t *bios,
+ uint8_t *src,
+ volatile uint8_t *dst,
unsigned int page_size)
{
int i;
toggle_ready_jedec(bios);
}
- return (0);
+ 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;
+ volatile uint8_t *bios = flash->virtual_memory;
+ uint8_t id1, id2;
*bios = RESET;
myusec_delay(10);
*bios = READ_ID;
myusec_delay(10);
- id1 = *(volatile unsigned char *) bios;
+ id1 = *(volatile uint8_t *)bios;
myusec_delay(10);
- id2 = *(volatile unsigned char *) (bios + 0x01);
+ id2 = *(volatile uint8_t *)(bios + 0x01);
*bios = RESET;
myusec_delay(10);
- printf("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, id1, id2);
+ printf_debug("%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;
+ volatile uint8_t *bios = flash->virtual_memory;
unprotect_28sf040(bios);
*bios = CHIP_ERASE;
myusec_delay(10);
toggle_ready_jedec(bios);
- return (0);
+ return 0;
}
-int write_28sf040(struct flashchip *flash, unsigned char *buf)
+int write_28sf040(struct flashchip *flash, uint8_t *buf)
{
int i;
- int total_size = flash->total_size * 1024, page_size =
- flash->page_size;
- volatile char *bios = flash->virt_addr;
+ int total_size = flash->total_size * 1024;
+ int page_size = flash->page_size;
+ volatile uint8_t *bios = flash->virtual_memory;
unprotect_28sf040(bios);
- printf("Programming Page: ");
+ printf("Programming page: ");
for (i = 0; i < total_size / page_size; i++) {
/* erase the page before programming */
erase_sector_28sf040(bios, i * page_size);
protect_28sf040(bios);
- return (0);
+ return 0;
}
projects / coreboot.git / blobdiff