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linux/drivers/mtd/maps/physmap.c
David Woodhouse ccd93854d4 [MTD] Remove mtd->{suspend,resume} calls from board drivers 
Now the MTD core will do this for us, we don't need to hook it up from
the board drivers.

Shame we can't do shutdown from the class too...

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-05-26 16:45:44 +01:00

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/*
* Normal mappings of chips in physical memory
*
* Copyright (C) 2003 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* 031022 - [jsun] add run-time configure and partition setup
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/mtd/concat.h>
#include <linux/io.h>
#define MAX_RESOURCES 4
struct physmap_flash_info {
struct mtd_info *mtd[MAX_RESOURCES];
struct mtd_info *cmtd;
struct map_info map[MAX_RESOURCES];
#ifdef CONFIG_MTD_PARTITIONS
int nr_parts;
struct mtd_partition *parts;
#endif
};
static int physmap_flash_remove(struct platform_device *dev)
{
struct physmap_flash_info *info;
struct physmap_flash_data *physmap_data;
int i;
info = platform_get_drvdata(dev);
if (info == NULL)
return 0;
platform_set_drvdata(dev, NULL);
physmap_data = dev->dev.platform_data;
if (info->cmtd) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts || physmap_data->nr_parts)
del_mtd_partitions(info->cmtd);
else
del_mtd_device(info->cmtd);
#else
del_mtd_device(info->cmtd);
#endif
}
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts)
kfree(info->parts);
#endif
#ifdef CONFIG_MTD_CONCAT
if (info->cmtd != info->mtd[0])
mtd_concat_destroy(info->cmtd);
#endif
for (i = 0; i < MAX_RESOURCES; i++) {
if (info->mtd[i] != NULL)
map_destroy(info->mtd[i]);
}
return 0;
}
static const char *rom_probe_types[] = {
"cfi_probe",
"jedec_probe",
"qinfo_probe",
"map_rom",
NULL };
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
#endif
static int physmap_flash_probe(struct platform_device *dev)
{
struct physmap_flash_data *physmap_data;
struct physmap_flash_info *info;
const char **probe_type;
int err = 0;
int i;
int devices_found = 0;
physmap_data = dev->dev.platform_data;
if (physmap_data == NULL)
return -ENODEV;
info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
GFP_KERNEL);
if (info == NULL) {
err = -ENOMEM;
goto err_out;
}
platform_set_drvdata(dev, info);
for (i = 0; i < dev->num_resources; i++) {
printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
(unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
(unsigned long long)dev->resource[i].start);
if (!devm_request_mem_region(&dev->dev,
dev->resource[i].start,
dev->resource[i].end - dev->resource[i].start + 1,
dev_name(&dev->dev))) {
dev_err(&dev->dev, "Could not reserve memory region\n");
err = -ENOMEM;
goto err_out;
}
info->map[i].name = dev_name(&dev->dev);
info->map[i].phys = dev->resource[i].start;
info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
info->map[i].bankwidth = physmap_data->width;
info->map[i].set_vpp = physmap_data->set_vpp;
info->map[i].pfow_base = physmap_data->pfow_base;
info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
info->map[i].size);
if (info->map[i].virt == NULL) {
dev_err(&dev->dev, "Failed to ioremap flash region\n");
err = EIO;
goto err_out;
}
simple_map_init(&info->map[i]);
probe_type = rom_probe_types;
for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
if (info->mtd[i] == NULL) {
dev_err(&dev->dev, "map_probe failed\n");
err = -ENXIO;
goto err_out;
} else {
devices_found++;
}
info->mtd[i]->owner = THIS_MODULE;
info->mtd[i]->dev.parent = &dev->dev;
}
if (devices_found == 1) {
info->cmtd = info->mtd[0];
} else if (devices_found > 1) {
/*
* We detected multiple devices. Concatenate them together.
*/
#ifdef CONFIG_MTD_CONCAT
info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
if (info->cmtd == NULL)
err = -ENXIO;
#else
printk(KERN_ERR "physmap-flash: multiple devices "
"found but MTD concat support disabled.\n");
err = -ENXIO;
#endif
}
if (err)
goto err_out;
#ifdef CONFIG_MTD_PARTITIONS
err = parse_mtd_partitions(info->cmtd, part_probe_types,
&info->parts, 0);
if (err > 0) {
add_mtd_partitions(info->cmtd, info->parts, err);
info->nr_parts = err;
return 0;
}
if (physmap_data->nr_parts) {
printk(KERN_NOTICE "Using physmap partition information\n");
add_mtd_partitions(info->cmtd, physmap_data->parts,
physmap_data->nr_parts);
return 0;
}
#endif
add_mtd_device(info->cmtd);
return 0;
err_out:
physmap_flash_remove(dev);
return err;
}
#ifdef CONFIG_PM
static void physmap_flash_shutdown(struct platform_device *dev)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
int i;
for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
if (info->mtd[i]->suspend && info->mtd[i]->resume)
if (info->mtd[i]->suspend(info->mtd[i]) == 0)
info->mtd[i]->resume(info->mtd[i]);
}
#else
#define physmap_flash_shutdown NULL
#endif
static struct platform_driver physmap_flash_driver = {
.probe = physmap_flash_probe,
.remove = physmap_flash_remove,
.shutdown = physmap_flash_shutdown,
.driver = {
.name = "physmap-flash",
.owner = THIS_MODULE,
},
};
#ifdef CONFIG_MTD_PHYSMAP_COMPAT
static struct physmap_flash_data physmap_flash_data = {
.width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
};
static struct resource physmap_flash_resource = {
.start = CONFIG_MTD_PHYSMAP_START,
.end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device physmap_flash = {
.name = "physmap-flash",
.id = 0,
.dev = {
.platform_data = &physmap_flash_data,
},
.num_resources = 1,
.resource = &physmap_flash_resource,
};
void physmap_configure(unsigned long addr, unsigned long size,
int bankwidth, void (*set_vpp)(struct map_info *, int))
{
physmap_flash_resource.start = addr;
physmap_flash_resource.end = addr + size - 1;
physmap_flash_data.width = bankwidth;
physmap_flash_data.set_vpp = set_vpp;
}
#ifdef CONFIG_MTD_PARTITIONS
void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
{
physmap_flash_data.nr_parts = num_parts;
physmap_flash_data.parts = parts;
}
#endif
#endif
static int __init physmap_init(void)
{
int err;
err = platform_driver_register(&physmap_flash_driver);
#ifdef CONFIG_MTD_PHYSMAP_COMPAT
if (err == 0)
platform_device_register(&physmap_flash);
#endif
return err;
}
static void __exit physmap_exit(void)
{
#ifdef CONFIG_MTD_PHYSMAP_COMPAT
platform_device_unregister(&physmap_flash);
#endif
platform_driver_unregister(&physmap_flash_driver);
}
module_init(physmap_init);
module_exit(physmap_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
/* legacy platform drivers can't hotplug or coldplg */
#ifndef CONFIG_MTD_PHYSMAP_COMPAT
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:physmap-flash");
#endif
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