linux/drivers/mtd/maps/plat-ram.c
Adrian Bunk 59018b6d2a MTD/JFFS2: remove CVS keywords
Once upon a time, the MTD repository was using CVS.

This patch therefore removes all usages of the no longer updated CVS
keywords from the MTD code.

This also includes code that printed them to the user.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2008-06-04 17:50:17 +01:00

299 lines
6.7 KiB
C

/* drivers/mtd/maps/plat-ram.c
*
* (c) 2004-2005 Simtec Electronics
* http://www.simtec.co.uk/products/SWLINUX/
* Ben Dooks <ben@simtec.co.uk>
*
* Generic platfrom device based RAM map
*
* 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
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/plat-ram.h>
#include <asm/io.h>
/* private structure for each mtd platform ram device created */
struct platram_info {
struct device *dev;
struct mtd_info *mtd;
struct map_info map;
struct mtd_partition *partitions;
bool free_partitions;
struct resource *area;
struct platdata_mtd_ram *pdata;
};
/* to_platram_info()
*
* device private data to struct platram_info conversion
*/
static inline struct platram_info *to_platram_info(struct platform_device *dev)
{
return (struct platram_info *)platform_get_drvdata(dev);
}
/* platram_setrw
*
* call the platform device's set rw/ro control
*
* to = 0 => read-only
* = 1 => read-write
*/
static inline void platram_setrw(struct platram_info *info, int to)
{
if (info->pdata == NULL)
return;
if (info->pdata->set_rw != NULL)
(info->pdata->set_rw)(info->dev, to);
}
/* platram_remove
*
* called to remove the device from the driver's control
*/
static int platram_remove(struct platform_device *pdev)
{
struct platram_info *info = to_platram_info(pdev);
platform_set_drvdata(pdev, NULL);
dev_dbg(&pdev->dev, "removing device\n");
if (info == NULL)
return 0;
if (info->mtd) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->partitions) {
del_mtd_partitions(info->mtd);
if (info->free_partitions)
kfree(info->partitions);
}
#endif
del_mtd_device(info->mtd);
map_destroy(info->mtd);
}
/* ensure ram is left read-only */
platram_setrw(info, PLATRAM_RO);
/* release resources */
if (info->area) {
release_resource(info->area);
kfree(info->area);
}
if (info->map.virt != NULL)
iounmap(info->map.virt);
kfree(info);
return 0;
}
/* platram_probe
*
* called from device drive system when a device matching our
* driver is found.
*/
static int platram_probe(struct platform_device *pdev)
{
struct platdata_mtd_ram *pdata;
struct platram_info *info;
struct resource *res;
int err = 0;
dev_dbg(&pdev->dev, "probe entered\n");
if (pdev->dev.platform_data == NULL) {
dev_err(&pdev->dev, "no platform data supplied\n");
err = -ENOENT;
goto exit_error;
}
pdata = pdev->dev.platform_data;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (info == NULL) {
dev_err(&pdev->dev, "no memory for flash info\n");
err = -ENOMEM;
goto exit_error;
}
platform_set_drvdata(pdev, info);
info->dev = &pdev->dev;
info->pdata = pdata;
/* get the resource for the memory mapping */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no memory resource specified\n");
err = -ENOENT;
goto exit_free;
}
dev_dbg(&pdev->dev, "got platform resource %p (0x%llx)\n", res,
(unsigned long long)res->start);
/* setup map parameters */
info->map.phys = res->start;
info->map.size = (res->end - res->start) + 1;
info->map.name = pdata->mapname != NULL ?
(char *)pdata->mapname : (char *)pdev->name;
info->map.bankwidth = pdata->bankwidth;
/* register our usage of the memory area */
info->area = request_mem_region(res->start, info->map.size, pdev->name);
if (info->area == NULL) {
dev_err(&pdev->dev, "failed to request memory region\n");
err = -EIO;
goto exit_free;
}
/* remap the memory area */
info->map.virt = ioremap(res->start, info->map.size);
dev_dbg(&pdev->dev, "virt %p, %lu bytes\n", info->map.virt, info->map.size);
if (info->map.virt == NULL) {
dev_err(&pdev->dev, "failed to ioremap() region\n");
err = -EIO;
goto exit_free;
}
simple_map_init(&info->map);
dev_dbg(&pdev->dev, "initialised map, probing for mtd\n");
/* probe for the right mtd map driver
* supplied by the platform_data struct */
if (pdata->map_probes) {
const char **map_probes = pdata->map_probes;
for ( ; !info->mtd && *map_probes; map_probes++)
info->mtd = do_map_probe(*map_probes , &info->map);
}
/* fallback to map_ram */
else
info->mtd = do_map_probe("map_ram", &info->map);
if (info->mtd == NULL) {
dev_err(&pdev->dev, "failed to probe for map_ram\n");
err = -ENOMEM;
goto exit_free;
}
info->mtd->owner = THIS_MODULE;
platram_setrw(info, PLATRAM_RW);
/* check to see if there are any available partitions, or wether
* to add this device whole */
#ifdef CONFIG_MTD_PARTITIONS
if (!pdata->nr_partitions) {
/* try to probe using the supplied probe type */
if (pdata->probes) {
err = parse_mtd_partitions(info->mtd, pdata->probes,
&info->partitions, 0);
info->free_partitions = 1;
if (err > 0)
err = add_mtd_partitions(info->mtd,
info->partitions, err);
}
}
/* use the static mapping */
else
err = add_mtd_partitions(info->mtd, pdata->partitions,
pdata->nr_partitions);
#endif /* CONFIG_MTD_PARTITIONS */
if (add_mtd_device(info->mtd)) {
dev_err(&pdev->dev, "add_mtd_device() failed\n");
err = -ENOMEM;
}
if (!err)
dev_info(&pdev->dev, "registered mtd device\n");
return err;
exit_free:
platram_remove(pdev);
exit_error:
return err;
}
/* device driver info */
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:mtd-ram");
static struct platform_driver platram_driver = {
.probe = platram_probe,
.remove = platram_remove,
.driver = {
.name = "mtd-ram",
.owner = THIS_MODULE,
},
};
/* module init/exit */
static int __init platram_init(void)
{
printk("Generic platform RAM MTD, (c) 2004 Simtec Electronics\n");
return platform_driver_register(&platram_driver);
}
static void __exit platram_exit(void)
{
platform_driver_unregister(&platram_driver);
}
module_init(platram_init);
module_exit(platram_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("MTD platform RAM map driver");