kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
linux-hardened/drivers/mtd/maps/integrator-flash.c
Dmitry Eremin-Solenikov a8adc3f01b mtd: drop CONFIG_MTD_CONCAT ifdefs 
As MTD_CONCAT is becoming a part of mtd core, it's now meaningless
to to check for it in ifdefs. Drop such references from MTD code.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2011-03-11 14:22:40 +00:00

309 lines
6.9 KiB
C
Raw Blame History

/*======================================================================
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.
======================================================================*/
#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/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/concat.h>
#include <asm/mach/flash.h>
#include <mach/hardware.h>
#include <asm/system.h>
struct armflash_subdev_info {
char *name;
struct mtd_info *mtd;
struct map_info map;
struct flash_platform_data *plat;
};
struct armflash_info {
struct resource *res;
struct mtd_partition *parts;
struct mtd_info *mtd;
int nr_subdev;
struct armflash_subdev_info subdev[0];
};
static void armflash_set_vpp(struct map_info *map, int on)
{
struct armflash_subdev_info *info =
container_of(map, struct armflash_subdev_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_subdev_probe(struct armflash_subdev_info *subdev,
struct resource *res)
{
struct flash_platform_data *plat = subdev->plat;
resource_size_t size = res->end - res->start + 1;
void __iomem *base;
int err = 0;
if (!request_mem_region(res->start, size, subdev->name)) {
err = -EBUSY;
goto out;
}
base = ioremap(res->start, size);
if (!base) {
err = -ENOMEM;
goto no_mem;
}
/*
* look for CFI based flash parts fitted to this board
*/
subdev->map.size = size;
subdev->map.bankwidth = plat->width;
subdev->map.phys = res->start;
subdev->map.virt = base;
subdev->map.name = subdev->name;
subdev->map.set_vpp = armflash_set_vpp;
simple_map_init(&subdev->map);
/*
* Also, the CFI layer automatically works out what size
* of chips we have, and does the necessary identification
* for us automatically.
*/
subdev->mtd = do_map_probe(plat->map_name, &subdev->map);
if (!subdev->mtd) {
err = -ENXIO;
goto no_device;
}
subdev->mtd->owner = THIS_MODULE;
/* Successful? */
if (err == 0)
return err;
if (subdev->mtd)
map_destroy(subdev->mtd);
no_device:
iounmap(base);
no_mem:
release_mem_region(res->start, size);
out:
return err;
}
static void armflash_subdev_remove(struct armflash_subdev_info *subdev)
{
if (subdev->mtd)
map_destroy(subdev->mtd);
if (subdev->map.virt)
iounmap(subdev->map.virt);
kfree(subdev->name);
subdev->name = NULL;
release_mem_region(subdev->map.phys, subdev->map.size);
}
static int armflash_probe(struct platform_device *dev)
{
struct flash_platform_data *plat = dev->dev.platform_data;
unsigned int size;
struct armflash_info *info;
int i, nr, err;
/* Count the number of devices */
for (nr = 0; ; nr++)
if (!platform_get_resource(dev, IORESOURCE_MEM, nr))
break;
if (nr == 0) {
err = -ENODEV;
goto out;
}
size = sizeof(struct armflash_info) +
sizeof(struct armflash_subdev_info) * nr;
info = kzalloc(size, GFP_KERNEL);
if (!info) {
err = -ENOMEM;
goto out;
}
if (plat && plat->init) {
err = plat->init();
if (err)
goto no_resource;
}
for (i = 0; i < nr; i++) {
struct armflash_subdev_info *subdev = &info->subdev[i];
struct resource *res;
res = platform_get_resource(dev, IORESOURCE_MEM, i);
if (!res)
break;
if (nr == 1)
/* No MTD concatenation, just use the default name */
subdev->name = kstrdup(dev_name(&dev->dev), GFP_KERNEL);
else
subdev->name = kasprintf(GFP_KERNEL, "%s-%d",
dev_name(&dev->dev), i);
if (!subdev->name) {
err = -ENOMEM;
break;
}
subdev->plat = plat;
err = armflash_subdev_probe(subdev, res);
if (err) {
kfree(subdev->name);
subdev->name = NULL;
break;
}
}
info->nr_subdev = i;
if (err)
goto subdev_err;
if (info->nr_subdev == 1)
info->mtd = info->subdev[0].mtd;
else if (info->nr_subdev > 1) {
struct mtd_info *cdev[info->nr_subdev];
/*
* We detected multiple devices. Concatenate them together.
*/
for (i = 0; i < info->nr_subdev; i++)
cdev[i] = info->subdev[i].mtd;
info->mtd = mtd_concat_create(cdev, info->nr_subdev,
dev_name(&dev->dev));
if (info->mtd == NULL)
err = -ENXIO;
}
if (err < 0)
goto cleanup;
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);
return err;
}
/*
* We got an error, free all resources.
*/
cleanup:
if (info->mtd) {
del_mtd_partitions(info->mtd);
if (info->mtd != info->subdev[0].mtd)
mtd_concat_destroy(info->mtd);
}
kfree(info->parts);
subdev_err:
for (i = info->nr_subdev - 1; i >= 0; i--)
armflash_subdev_remove(&info->subdev[i]);
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);
struct flash_platform_data *plat = dev->dev.platform_data;
int i;
platform_set_drvdata(dev, NULL);
if (info) {
if (info->mtd) {
del_mtd_partitions(info->mtd);
if (info->mtd != info->subdev[0].mtd)
mtd_concat_destroy(info->mtd);
}
kfree(info->parts);
for (i = info->nr_subdev - 1; i >= 0; i--)
armflash_subdev_remove(&info->subdev[i]);
if (plat && plat->exit)
plat->exit();
kfree(info);
}
return 0;
}
static struct platform_driver armflash_driver = {
.probe = armflash_probe,
.remove = armflash_remove,
.driver = {
.name = "armflash",
.owner = THIS_MODULE,
},
};
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");
MODULE_ALIAS("platform:armflash");
Reference in a new issue View git blame Copy permalink