![Russell King](/assets/img/avatar_default.png)
This allows us to eliminate the casts in the drivers, and eventually remove the use of the device_driver function pointer methods for platform device drivers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
215 lines
4.9 KiB
C
215 lines
4.9 KiB
C
/*======================================================================
|
|
|
|
drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver
|
|
|
|
Copyright (C) 2000 ARM Limited
|
|
Copyright (C) 2003 Deep Blue Solutions Ltd.
|
|
|
|
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
This is access code for flashes using ARM's flash partitioning
|
|
standards.
|
|
|
|
$Id: integrator-flash.c,v 1.20 2005/11/07 11:14:27 gleixner Exp $
|
|
|
|
======================================================================*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <asm/mach/flash.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/io.h>
|
|
#include <asm/system.h>
|
|
|
|
#ifdef CONFIG_ARCH_P720T
|
|
#define FLASH_BASE (0x04000000)
|
|
#define FLASH_SIZE (64*1024*1024)
|
|
#endif
|
|
|
|
struct armflash_info {
|
|
struct flash_platform_data *plat;
|
|
struct resource *res;
|
|
struct mtd_partition *parts;
|
|
struct mtd_info *mtd;
|
|
struct map_info map;
|
|
};
|
|
|
|
static void armflash_set_vpp(struct map_info *map, int on)
|
|
{
|
|
struct armflash_info *info = container_of(map, struct armflash_info, map);
|
|
|
|
if (info->plat && info->plat->set_vpp)
|
|
info->plat->set_vpp(on);
|
|
}
|
|
|
|
static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };
|
|
|
|
static int armflash_probe(struct platform_device *dev)
|
|
{
|
|
struct flash_platform_data *plat = dev->dev.platform_data;
|
|
struct resource *res = dev->resource;
|
|
unsigned int size = res->end - res->start + 1;
|
|
struct armflash_info *info;
|
|
int err;
|
|
void __iomem *base;
|
|
|
|
info = kmalloc(sizeof(struct armflash_info), GFP_KERNEL);
|
|
if (!info) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
memset(info, 0, sizeof(struct armflash_info));
|
|
|
|
info->plat = plat;
|
|
if (plat && plat->init) {
|
|
err = plat->init();
|
|
if (err)
|
|
goto no_resource;
|
|
}
|
|
|
|
info->res = request_mem_region(res->start, size, "armflash");
|
|
if (!info->res) {
|
|
err = -EBUSY;
|
|
goto no_resource;
|
|
}
|
|
|
|
base = ioremap(res->start, size);
|
|
if (!base) {
|
|
err = -ENOMEM;
|
|
goto no_mem;
|
|
}
|
|
|
|
/*
|
|
* look for CFI based flash parts fitted to this board
|
|
*/
|
|
info->map.size = size;
|
|
info->map.bankwidth = plat->width;
|
|
info->map.phys = res->start;
|
|
info->map.virt = base;
|
|
info->map.name = dev->dev.bus_id;
|
|
info->map.set_vpp = armflash_set_vpp;
|
|
|
|
simple_map_init(&info->map);
|
|
|
|
/*
|
|
* Also, the CFI layer automatically works out what size
|
|
* of chips we have, and does the necessary identification
|
|
* for us automatically.
|
|
*/
|
|
info->mtd = do_map_probe(plat->map_name, &info->map);
|
|
if (!info->mtd) {
|
|
err = -ENXIO;
|
|
goto no_device;
|
|
}
|
|
|
|
info->mtd->owner = THIS_MODULE;
|
|
|
|
err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);
|
|
if (err > 0) {
|
|
err = add_mtd_partitions(info->mtd, info->parts, err);
|
|
if (err)
|
|
printk(KERN_ERR
|
|
"mtd partition registration failed: %d\n", err);
|
|
}
|
|
|
|
if (err == 0)
|
|
platform_set_drvdata(dev, info);
|
|
|
|
/*
|
|
* If we got an error, free all resources.
|
|
*/
|
|
if (err < 0) {
|
|
if (info->mtd) {
|
|
del_mtd_partitions(info->mtd);
|
|
map_destroy(info->mtd);
|
|
}
|
|
kfree(info->parts);
|
|
|
|
no_device:
|
|
iounmap(base);
|
|
no_mem:
|
|
release_mem_region(res->start, size);
|
|
no_resource:
|
|
if (plat && plat->exit)
|
|
plat->exit();
|
|
kfree(info);
|
|
}
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int armflash_remove(struct platform_device *dev)
|
|
{
|
|
struct armflash_info *info = platform_get_drvdata(dev);
|
|
|
|
platform_set_drvdata(dev, NULL);
|
|
|
|
if (info) {
|
|
if (info->mtd) {
|
|
del_mtd_partitions(info->mtd);
|
|
map_destroy(info->mtd);
|
|
}
|
|
kfree(info->parts);
|
|
|
|
iounmap(info->map.virt);
|
|
release_resource(info->res);
|
|
kfree(info->res);
|
|
|
|
if (info->plat && info->plat->exit)
|
|
info->plat->exit();
|
|
|
|
kfree(info);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver armflash_driver = {
|
|
.probe = armflash_probe,
|
|
.remove = armflash_remove,
|
|
.driver = {
|
|
.name = "armflash",
|
|
},
|
|
};
|
|
|
|
static int __init armflash_init(void)
|
|
{
|
|
return platform_driver_register(&armflash_driver);
|
|
}
|
|
|
|
static void __exit armflash_exit(void)
|
|
{
|
|
platform_driver_unregister(&armflash_driver);
|
|
}
|
|
|
|
module_init(armflash_init);
|
|
module_exit(armflash_exit);
|
|
|
|
MODULE_AUTHOR("ARM Ltd");
|
|
MODULE_DESCRIPTION("ARM Integrator CFI map driver");
|
|
MODULE_LICENSE("GPL");
|