281 lines
6.7 KiB
C
281 lines
6.7 KiB
C
/*
|
|
* 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];
|
|
spinlock_t vpp_lock;
|
|
int vpp_refcnt;
|
|
};
|
|
|
|
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;
|
|
|
|
physmap_data = dev_get_platdata(&dev->dev);
|
|
|
|
if (info->cmtd) {
|
|
mtd_device_unregister(info->cmtd);
|
|
if (info->cmtd != info->mtd[0])
|
|
mtd_concat_destroy(info->cmtd);
|
|
}
|
|
|
|
for (i = 0; i < MAX_RESOURCES; i++) {
|
|
if (info->mtd[i] != NULL)
|
|
map_destroy(info->mtd[i]);
|
|
}
|
|
|
|
if (physmap_data->exit)
|
|
physmap_data->exit(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void physmap_set_vpp(struct map_info *map, int state)
|
|
{
|
|
struct platform_device *pdev;
|
|
struct physmap_flash_data *physmap_data;
|
|
struct physmap_flash_info *info;
|
|
unsigned long flags;
|
|
|
|
pdev = (struct platform_device *)map->map_priv_1;
|
|
physmap_data = dev_get_platdata(&pdev->dev);
|
|
|
|
if (!physmap_data->set_vpp)
|
|
return;
|
|
|
|
info = platform_get_drvdata(pdev);
|
|
|
|
spin_lock_irqsave(&info->vpp_lock, flags);
|
|
if (state) {
|
|
if (++info->vpp_refcnt == 1) /* first nested 'on' */
|
|
physmap_data->set_vpp(pdev, 1);
|
|
} else {
|
|
if (--info->vpp_refcnt == 0) /* last nested 'off' */
|
|
physmap_data->set_vpp(pdev, 0);
|
|
}
|
|
spin_unlock_irqrestore(&info->vpp_lock, flags);
|
|
}
|
|
|
|
static const char * const rom_probe_types[] = {
|
|
"cfi_probe", "jedec_probe", "qinfo_probe", "map_rom", NULL };
|
|
|
|
static const char * const part_probe_types[] = {
|
|
"cmdlinepart", "RedBoot", "afs", NULL };
|
|
|
|
static int physmap_flash_probe(struct platform_device *dev)
|
|
{
|
|
struct physmap_flash_data *physmap_data;
|
|
struct physmap_flash_info *info;
|
|
const char * const *probe_type;
|
|
const char * const *part_types;
|
|
int err = 0;
|
|
int i;
|
|
int devices_found = 0;
|
|
|
|
physmap_data = dev_get_platdata(&dev->dev);
|
|
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;
|
|
}
|
|
|
|
if (physmap_data->init) {
|
|
err = physmap_data->init(dev);
|
|
if (err)
|
|
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)resource_size(&dev->resource[i]),
|
|
(unsigned long long)dev->resource[i].start);
|
|
|
|
if (!devm_request_mem_region(&dev->dev,
|
|
dev->resource[i].start,
|
|
resource_size(&dev->resource[i]),
|
|
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 = resource_size(&dev->resource[i]);
|
|
info->map[i].bankwidth = physmap_data->width;
|
|
info->map[i].set_vpp = physmap_set_vpp;
|
|
info->map[i].pfow_base = physmap_data->pfow_base;
|
|
info->map[i].map_priv_1 = (unsigned long)dev;
|
|
|
|
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;
|
|
if (physmap_data->probe_type == NULL) {
|
|
for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
|
|
info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
|
|
} else
|
|
info->mtd[i] = do_map_probe(physmap_data->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]->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.
|
|
*/
|
|
info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
|
|
if (info->cmtd == NULL)
|
|
err = -ENXIO;
|
|
}
|
|
if (err)
|
|
goto err_out;
|
|
|
|
spin_lock_init(&info->vpp_lock);
|
|
|
|
part_types = physmap_data->part_probe_types ? : part_probe_types;
|
|
|
|
mtd_device_parse_register(info->cmtd, part_types, NULL,
|
|
physmap_data->parts, physmap_data->nr_parts);
|
|
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 (mtd_suspend(info->mtd[i]) == 0)
|
|
mtd_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",
|
|
},
|
|
};
|
|
|
|
|
|
#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,
|
|
};
|
|
#endif
|
|
|
|
static int __init physmap_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = platform_driver_register(&physmap_flash_driver);
|
|
#ifdef CONFIG_MTD_PHYSMAP_COMPAT
|
|
if (err == 0) {
|
|
err = platform_device_register(&physmap_flash);
|
|
if (err)
|
|
platform_driver_unregister(&physmap_flash_driver);
|
|
}
|
|
#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
|