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/*
* $Id: cstm_mips_ixx.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
*
* Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
* Config with both CFI and JEDEC device support.
*
* Basically physmap.c with the addition of partitions and
* an array of mapping info to accomodate more than one flash type per board.
*
* Copyright 2000 MontaVista Software Inc.
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
/* board and partition description */
#define MAX_PHYSMAP_PARTITIONS 8
struct cstm_mips_ixx_info {
char *name;
unsigned long window_addr;
unsigned long window_size;
int bankwidth;
int num_partitions;
};
#define PHYSMAP_NUMBER 1 // number of board desc structs needed, one per contiguous flash type
const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
{
{
"MTD flash", // name
CONFIG_MTD_CSTM_MIPS_IXX_START, // window_addr
CONFIG_MTD_CSTM_MIPS_IXX_LEN, // window_size
CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH, // bankwidth
1, // num_partitions
},
};
static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
{
{
.name = "main partition",
.size = CONFIG_MTD_CSTM_MIPS_IXX_LEN,
.offset = 0,
},
},
};
struct map_info cstm_mips_ixx_map[PHYSMAP_NUMBER];
int __init init_cstm_mips_ixx(void)
{
int i;
int jedec;
struct mtd_info *mymtd;
struct mtd_partition *parts;
/* Initialize mapping */
for (i=0;i<PHYSMAP_NUMBER;i++) {
printk(KERN_NOTICE "cstm_mips_ixx flash device: 0x%lx at 0x%lx\n",
cstm_mips_ixx_board_desc[i].window_size, cstm_mips_ixx_board_desc[i].window_addr);
cstm_mips_ixx_map[i].phys = cstm_mips_ixx_board_desc[i].window_addr;
cstm_mips_ixx_map[i].virt = ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
if (!cstm_mips_ixx_map[i].virt) {
int j = 0;
printk(KERN_WARNING "Failed to ioremap\n");
for (j = 0; j < i; j++) {
if (cstm_mips_ixx_map[j].virt) {
iounmap(cstm_mips_ixx_map[j].virt);
cstm_mips_ixx_map[j].virt = NULL;
}
}
return -EIO;
}
cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
cstm_mips_ixx_map[i].size = cstm_mips_ixx_board_desc[i].window_size;
cstm_mips_ixx_map[i].bankwidth = cstm_mips_ixx_board_desc[i].bankwidth;
simple_map_init(&cstm_mips_ixx_map[i]);
//printk(KERN_NOTICE "cstm_mips_ixx: ioremap is %x\n",(unsigned int)(cstm_mips_ixx_map[i].virt));
}
for (i=0;i<PHYSMAP_NUMBER;i++) {
parts = &cstm_mips_ixx_partitions[i][0];
jedec = 0;
mymtd = (struct mtd_info *)do_map_probe("cfi_probe", &cstm_mips_ixx_map[i]);
//printk(KERN_NOTICE "phymap %d cfi_probe: mymtd is %x\n",i,(unsigned int)mymtd);
if (!mymtd) {
jedec = 1;
mymtd = (struct mtd_info *)do_map_probe("jedec", &cstm_mips_ixx_map[i]);
printk(KERN_NOTICE "cstm_mips_ixx %d jedec: mymtd is %x\n",i,(unsigned int)mymtd);
}
if (mymtd) {
mymtd->owner = THIS_MODULE;
cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
}
else {
for (i = 0; i < PHYSMAP_NUMBER; i++) {
if (cstm_mips_ixx_map[i].virt) {
iounmap(cstm_mips_ixx_map[i].virt);
cstm_mips_ixx_map[i].virt = NULL;
}
}
return -ENXIO;
}
}
return 0;
}
static void __exit cleanup_cstm_mips_ixx(void)
{
int i;
struct mtd_info *mymtd;
for (i=0;i<PHYSMAP_NUMBER;i++) {
mymtd = (struct mtd_info *)cstm_mips_ixx_map[i].map_priv_2;
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
if (cstm_mips_ixx_map[i].virt) {
iounmap((void *)cstm_mips_ixx_map[i].virt);
cstm_mips_ixx_map[i].virt = 0;
}
}
}
module_init(init_cstm_mips_ixx);
module_exit(cleanup_cstm_mips_ixx);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
MODULE_DESCRIPTION("MTD map driver for MIPS boards");
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