2 * Normal mappings of chips in physical memory
4 * Copyright (C) 2003 MontaVista Software Inc.
5 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
7 * 031022 - [jsun] add run-time configure and partition setup
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/slab.h>
15 #include <linux/device.h>
16 #include <linux/platform_device.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/map.h>
19 #include <linux/mtd/partitions.h>
20 #include <linux/mtd/physmap.h>
21 #include <linux/mtd/concat.h>
24 #define MAX_RESOURCES 4
26 struct physmap_flash_info
{
27 struct mtd_info
*mtd
[MAX_RESOURCES
];
28 struct mtd_info
*cmtd
;
29 struct map_info map
[MAX_RESOURCES
];
30 #ifdef CONFIG_MTD_PARTITIONS
32 struct mtd_partition
*parts
;
36 static int physmap_flash_remove(struct platform_device
*dev
)
38 struct physmap_flash_info
*info
;
39 struct physmap_flash_data
*physmap_data
;
42 info
= platform_get_drvdata(dev
);
45 platform_set_drvdata(dev
, NULL
);
47 physmap_data
= dev
->dev
.platform_data
;
50 #ifdef CONFIG_MTD_PARTITIONS
51 if (info
->nr_parts
|| physmap_data
->nr_parts
) {
52 del_mtd_partitions(info
->cmtd
);
57 del_mtd_device(info
->cmtd
);
60 del_mtd_device(info
->cmtd
);
62 if (info
->cmtd
!= info
->mtd
[0])
63 mtd_concat_destroy(info
->cmtd
);
66 for (i
= 0; i
< MAX_RESOURCES
; i
++) {
67 if (info
->mtd
[i
] != NULL
)
68 map_destroy(info
->mtd
[i
]);
71 if (physmap_data
->exit
)
72 physmap_data
->exit(dev
);
77 static void physmap_set_vpp(struct map_info
*map
, int state
)
79 struct platform_device
*pdev
;
80 struct physmap_flash_data
*physmap_data
;
82 pdev
= (struct platform_device
*)map
->map_priv_1
;
83 physmap_data
= pdev
->dev
.platform_data
;
85 if (physmap_data
->set_vpp
)
86 physmap_data
->set_vpp(pdev
, state
);
89 static const char *rom_probe_types
[] = {
95 #ifdef CONFIG_MTD_PARTITIONS
96 static const char *part_probe_types
[] = { "cmdlinepart", "RedBoot", "afs",
100 static int physmap_flash_probe(struct platform_device
*dev
)
102 struct physmap_flash_data
*physmap_data
;
103 struct physmap_flash_info
*info
;
104 const char **probe_type
;
107 int devices_found
= 0;
109 physmap_data
= dev
->dev
.platform_data
;
110 if (physmap_data
== NULL
)
113 info
= devm_kzalloc(&dev
->dev
, sizeof(struct physmap_flash_info
),
120 if (physmap_data
->init
) {
121 err
= physmap_data
->init(dev
);
126 platform_set_drvdata(dev
, info
);
128 for (i
= 0; i
< dev
->num_resources
; i
++) {
129 printk(KERN_NOTICE
"physmap platform flash device: %.8llx at %.8llx\n",
130 (unsigned long long)resource_size(&dev
->resource
[i
]),
131 (unsigned long long)dev
->resource
[i
].start
);
133 if (!devm_request_mem_region(&dev
->dev
,
134 dev
->resource
[i
].start
,
135 resource_size(&dev
->resource
[i
]),
136 dev_name(&dev
->dev
))) {
137 dev_err(&dev
->dev
, "Could not reserve memory region\n");
142 info
->map
[i
].name
= dev_name(&dev
->dev
);
143 info
->map
[i
].phys
= dev
->resource
[i
].start
;
144 info
->map
[i
].size
= resource_size(&dev
->resource
[i
]);
145 info
->map
[i
].bankwidth
= physmap_data
->width
;
146 info
->map
[i
].set_vpp
= physmap_set_vpp
;
147 info
->map
[i
].pfow_base
= physmap_data
->pfow_base
;
148 info
->map
[i
].map_priv_1
= (unsigned long)dev
;
150 info
->map
[i
].virt
= devm_ioremap(&dev
->dev
, info
->map
[i
].phys
,
152 if (info
->map
[i
].virt
== NULL
) {
153 dev_err(&dev
->dev
, "Failed to ioremap flash region\n");
158 simple_map_init(&info
->map
[i
]);
160 probe_type
= rom_probe_types
;
161 if (physmap_data
->probe_type
== NULL
) {
162 for (; info
->mtd
[i
] == NULL
&& *probe_type
!= NULL
; probe_type
++)
163 info
->mtd
[i
] = do_map_probe(*probe_type
, &info
->map
[i
]);
165 info
->mtd
[i
] = do_map_probe(physmap_data
->probe_type
, &info
->map
[i
]);
167 if (info
->mtd
[i
] == NULL
) {
168 dev_err(&dev
->dev
, "map_probe failed\n");
174 info
->mtd
[i
]->owner
= THIS_MODULE
;
175 info
->mtd
[i
]->dev
.parent
= &dev
->dev
;
178 if (devices_found
== 1) {
179 info
->cmtd
= info
->mtd
[0];
180 } else if (devices_found
> 1) {
182 * We detected multiple devices. Concatenate them together.
184 info
->cmtd
= mtd_concat_create(info
->mtd
, devices_found
, dev_name(&dev
->dev
));
185 if (info
->cmtd
== NULL
)
191 #ifdef CONFIG_MTD_PARTITIONS
192 err
= parse_mtd_partitions(info
->cmtd
, part_probe_types
,
195 add_mtd_partitions(info
->cmtd
, info
->parts
, err
);
196 info
->nr_parts
= err
;
200 if (physmap_data
->nr_parts
) {
201 printk(KERN_NOTICE
"Using physmap partition information\n");
202 add_mtd_partitions(info
->cmtd
, physmap_data
->parts
,
203 physmap_data
->nr_parts
);
208 add_mtd_device(info
->cmtd
);
212 physmap_flash_remove(dev
);
217 static void physmap_flash_shutdown(struct platform_device
*dev
)
219 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
222 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
223 if (info
->mtd
[i
]->suspend
&& info
->mtd
[i
]->resume
)
224 if (info
->mtd
[i
]->suspend(info
->mtd
[i
]) == 0)
225 info
->mtd
[i
]->resume(info
->mtd
[i
]);
228 #define physmap_flash_shutdown NULL
231 static struct platform_driver physmap_flash_driver
= {
232 .probe
= physmap_flash_probe
,
233 .remove
= physmap_flash_remove
,
234 .shutdown
= physmap_flash_shutdown
,
236 .name
= "physmap-flash",
237 .owner
= THIS_MODULE
,
242 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
243 static struct physmap_flash_data physmap_flash_data
= {
244 .width
= CONFIG_MTD_PHYSMAP_BANKWIDTH
,
247 static struct resource physmap_flash_resource
= {
248 .start
= CONFIG_MTD_PHYSMAP_START
,
249 .end
= CONFIG_MTD_PHYSMAP_START
+ CONFIG_MTD_PHYSMAP_LEN
- 1,
250 .flags
= IORESOURCE_MEM
,
253 static struct platform_device physmap_flash
= {
254 .name
= "physmap-flash",
257 .platform_data
= &physmap_flash_data
,
260 .resource
= &physmap_flash_resource
,
263 void physmap_configure(unsigned long addr
, unsigned long size
,
264 int bankwidth
, void (*set_vpp
)(struct map_info
*, int))
266 physmap_flash_resource
.start
= addr
;
267 physmap_flash_resource
.end
= addr
+ size
- 1;
268 physmap_flash_data
.width
= bankwidth
;
269 physmap_flash_data
.set_vpp
= set_vpp
;
272 #ifdef CONFIG_MTD_PARTITIONS
273 void physmap_set_partitions(struct mtd_partition
*parts
, int num_parts
)
275 physmap_flash_data
.nr_parts
= num_parts
;
276 physmap_flash_data
.parts
= parts
;
281 static int __init
physmap_init(void)
285 err
= platform_driver_register(&physmap_flash_driver
);
286 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
288 err
= platform_device_register(&physmap_flash
);
290 platform_driver_unregister(&physmap_flash_driver
);
297 static void __exit
physmap_exit(void)
299 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
300 platform_device_unregister(&physmap_flash
);
302 platform_driver_unregister(&physmap_flash_driver
);
305 module_init(physmap_init
);
306 module_exit(physmap_exit
);
308 MODULE_LICENSE("GPL");
309 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
310 MODULE_DESCRIPTION("Generic configurable MTD map driver");
312 /* legacy platform drivers can't hotplug or coldplg */
313 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
314 /* work with hotplug and coldplug */
315 MODULE_ALIAS("platform:physmap-flash");