Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 | /*
* $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $
*
* 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 <asm/io.h>
struct physmap_flash_info {
struct mtd_info *mtd;
struct map_info map;
struct resource *res;
#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;
info = platform_get_drvdata(dev);
if (info == NULL)
return 0;
platform_set_drvdata(dev, NULL);
physmap_data = dev->dev.platform_data;
if (info->mtd != NULL) {
#ifdef CONFIG_MTD_PARTITIONS
if (info->nr_parts) {
del_mtd_partitions(info->mtd);
kfree(info->parts);
} else if (physmap_data->nr_parts) {
del_mtd_partitions(info->mtd);
} else {
del_mtd_device(info->mtd);
}
#else
del_mtd_device(info->mtd);
#endif
map_destroy(info->mtd);
}
if (info->map.virt != NULL)
iounmap(info->map.virt);
if (info->res != NULL) {
release_resource(info->res);
kfree(info->res);
}
return 0;
}
static const char *rom_probe_types[] = { "cfi_probe", "jedec_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;
physmap_data = dev->dev.platform_data;
if (physmap_data == NULL)
return -ENODEV;
printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
(unsigned long long)(dev->resource->end - dev->resource->start + 1),
(unsigned long long)dev->resource->start);
info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL);
if (info == NULL) {
err = -ENOMEM;
goto err_out;
}
platform_set_drvdata(dev, info);
info->res = request_mem_region(dev->resource->start,
dev->resource->end - dev->resource->start + 1,
dev->dev.bus_id);
if (info->res == NULL) {
dev_err(&dev->dev, "Could not reserve memory region\n");
err = -ENOMEM;
goto err_out;
}
info->map.name = dev->dev.bus_id;
info->map.phys = dev->resource->start;
info->map.size = dev->resource->end - dev->resource->start + 1;
info->map.bankwidth = physmap_data->width;
info->map.set_vpp = physmap_data->set_vpp;
info->map.virt = ioremap(info->map.phys, info->map.size);
if (info->map.virt == NULL) {
dev_err(&dev->dev, "Failed to ioremap flash region\n");
err = EIO;
goto err_out;
}
simple_map_init(&info->map);
probe_type = rom_probe_types;
for (; info->mtd == NULL && *probe_type != NULL; probe_type++)
info->mtd = do_map_probe(*probe_type, &info->map);
if (info->mtd == NULL) {
dev_err(&dev->dev, "map_probe failed\n");
err = -ENXIO;
goto err_out;
}
info->mtd->owner = THIS_MODULE;
#ifdef CONFIG_MTD_PARTITIONS
err = parse_mtd_partitions(info->mtd, part_probe_types, &info->parts, 0);
if (err > 0) {
add_mtd_partitions(info->mtd, info->parts, err);
return 0;
}
if (physmap_data->nr_parts) {
printk(KERN_NOTICE "Using physmap partition information\n");
add_mtd_partitions(info->mtd, physmap_data->parts,
physmap_data->nr_parts);
return 0;
}
#endif
add_mtd_device(info->mtd);
return 0;
err_out:
physmap_flash_remove(dev);
return err;
}
#ifdef CONFIG_PM
static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
int ret = 0;
if (info)
ret = info->mtd->suspend(info->mtd);
return ret;
}
static int physmap_flash_resume(struct platform_device *dev)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
if (info)
info->mtd->resume(info->mtd);
return 0;
}
static void physmap_flash_shutdown(struct platform_device *dev)
{
struct physmap_flash_info *info = platform_get_drvdata(dev);
if (info && info->mtd->suspend(info->mtd) == 0)
info->mtd->resume(info->mtd);
}
#endif
static struct platform_driver physmap_flash_driver = {
.probe = physmap_flash_probe,
.remove = physmap_flash_remove,
#ifdef CONFIG_PM
.suspend = physmap_flash_suspend,
.resume = physmap_flash_resume,
.shutdown = physmap_flash_shutdown,
#endif
.driver = {
.name = "physmap-flash",
},
};
#ifdef CONFIG_MTD_PHYSMAP_LEN
#if CONFIG_MTD_PHYSMAP_LEN != 0
#warning using PHYSMAP compat code
#define PHYSMAP_COMPAT
#endif
#endif
#ifdef 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 PHYSMAP_COMPAT
if (err == 0)
platform_device_register(&physmap_flash);
#endif
return err;
}
static void __exit physmap_exit(void)
{
#ifdef 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");
|