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
);
54 del_mtd_device(info
->cmtd
);
56 del_mtd_device(info
->cmtd
);
59 #ifdef CONFIG_MTD_PARTITIONS
64 #ifdef CONFIG_MTD_CONCAT
65 if (info
->cmtd
!= info
->mtd
[0])
66 mtd_concat_destroy(info
->cmtd
);
69 for (i
= 0; i
< MAX_RESOURCES
; i
++) {
70 if (info
->mtd
[i
] != NULL
)
71 map_destroy(info
->mtd
[i
]);
76 static const char *rom_probe_types
[] = {
82 #ifdef CONFIG_MTD_PARTITIONS
83 static const char *part_probe_types
[] = { "cmdlinepart", "RedBoot", NULL
};
86 static int physmap_flash_probe(struct platform_device
*dev
)
88 struct physmap_flash_data
*physmap_data
;
89 struct physmap_flash_info
*info
;
90 const char **probe_type
;
93 int devices_found
= 0;
95 physmap_data
= dev
->dev
.platform_data
;
96 if (physmap_data
== NULL
)
99 info
= devm_kzalloc(&dev
->dev
, sizeof(struct physmap_flash_info
),
106 platform_set_drvdata(dev
, info
);
108 for (i
= 0; i
< dev
->num_resources
; i
++) {
109 printk(KERN_NOTICE
"physmap platform flash device: %.8llx at %.8llx\n",
110 (unsigned long long)(dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1),
111 (unsigned long long)dev
->resource
[i
].start
);
113 if (!devm_request_mem_region(&dev
->dev
,
114 dev
->resource
[i
].start
,
115 dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1,
116 dev_name(&dev
->dev
))) {
117 dev_err(&dev
->dev
, "Could not reserve memory region\n");
122 info
->map
[i
].name
= dev_name(&dev
->dev
);
123 info
->map
[i
].phys
= dev
->resource
[i
].start
;
124 info
->map
[i
].size
= dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1;
125 info
->map
[i
].bankwidth
= physmap_data
->width
;
126 info
->map
[i
].set_vpp
= physmap_data
->set_vpp
;
127 info
->map
[i
].pfow_base
= physmap_data
->pfow_base
;
129 info
->map
[i
].virt
= devm_ioremap(&dev
->dev
, info
->map
[i
].phys
,
131 if (info
->map
[i
].virt
== NULL
) {
132 dev_err(&dev
->dev
, "Failed to ioremap flash region\n");
137 simple_map_init(&info
->map
[i
]);
139 probe_type
= rom_probe_types
;
140 for (; info
->mtd
[i
] == NULL
&& *probe_type
!= NULL
; probe_type
++)
141 info
->mtd
[i
] = do_map_probe(*probe_type
, &info
->map
[i
]);
142 if (info
->mtd
[i
] == NULL
) {
143 dev_err(&dev
->dev
, "map_probe failed\n");
149 info
->mtd
[i
]->owner
= THIS_MODULE
;
152 if (devices_found
== 1) {
153 info
->cmtd
= info
->mtd
[0];
154 } else if (devices_found
> 1) {
156 * We detected multiple devices. Concatenate them together.
158 #ifdef CONFIG_MTD_CONCAT
159 info
->cmtd
= mtd_concat_create(info
->mtd
, devices_found
, dev_name(&dev
->dev
));
160 if (info
->cmtd
== NULL
)
163 printk(KERN_ERR
"physmap-flash: multiple devices "
164 "found but MTD concat support disabled.\n");
171 #ifdef CONFIG_MTD_PARTITIONS
172 err
= parse_mtd_partitions(info
->cmtd
, part_probe_types
,
175 add_mtd_partitions(info
->cmtd
, info
->parts
, err
);
176 info
->nr_parts
= err
;
180 if (physmap_data
->nr_parts
) {
181 printk(KERN_NOTICE
"Using physmap partition information\n");
182 add_mtd_partitions(info
->cmtd
, physmap_data
->parts
,
183 physmap_data
->nr_parts
);
188 add_mtd_device(info
->cmtd
);
192 physmap_flash_remove(dev
);
197 static int physmap_flash_suspend(struct platform_device
*dev
, pm_message_t state
)
199 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
203 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
204 if (info
->mtd
[i
]->suspend
) {
205 ret
= info
->mtd
[i
]->suspend(info
->mtd
[i
]);
212 for (--i
; i
>= 0; --i
)
213 if (info
->mtd
[i
]->suspend
) {
214 BUG_ON(!info
->mtd
[i
]->resume
);
215 info
->mtd
[i
]->resume(info
->mtd
[i
]);
221 static int physmap_flash_resume(struct platform_device
*dev
)
223 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
226 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
227 if (info
->mtd
[i
]->resume
)
228 info
->mtd
[i
]->resume(info
->mtd
[i
]);
233 static void physmap_flash_shutdown(struct platform_device
*dev
)
235 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
238 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
239 if (info
->mtd
[i
]->suspend
&& info
->mtd
[i
]->resume
)
240 if (info
->mtd
[i
]->suspend(info
->mtd
[i
]) == 0)
241 info
->mtd
[i
]->resume(info
->mtd
[i
]);
244 #define physmap_flash_suspend NULL
245 #define physmap_flash_resume NULL
246 #define physmap_flash_shutdown NULL
249 static struct platform_driver physmap_flash_driver
= {
250 .probe
= physmap_flash_probe
,
251 .remove
= physmap_flash_remove
,
252 .suspend
= physmap_flash_suspend
,
253 .resume
= physmap_flash_resume
,
254 .shutdown
= physmap_flash_shutdown
,
256 .name
= "physmap-flash",
257 .owner
= THIS_MODULE
,
262 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
263 static struct physmap_flash_data physmap_flash_data
= {
264 .width
= CONFIG_MTD_PHYSMAP_BANKWIDTH
,
267 static struct resource physmap_flash_resource
= {
268 .start
= CONFIG_MTD_PHYSMAP_START
,
269 .end
= CONFIG_MTD_PHYSMAP_START
+ CONFIG_MTD_PHYSMAP_LEN
- 1,
270 .flags
= IORESOURCE_MEM
,
273 static struct platform_device physmap_flash
= {
274 .name
= "physmap-flash",
277 .platform_data
= &physmap_flash_data
,
280 .resource
= &physmap_flash_resource
,
283 void physmap_configure(unsigned long addr
, unsigned long size
,
284 int bankwidth
, void (*set_vpp
)(struct map_info
*, int))
286 physmap_flash_resource
.start
= addr
;
287 physmap_flash_resource
.end
= addr
+ size
- 1;
288 physmap_flash_data
.width
= bankwidth
;
289 physmap_flash_data
.set_vpp
= set_vpp
;
292 #ifdef CONFIG_MTD_PARTITIONS
293 void physmap_set_partitions(struct mtd_partition
*parts
, int num_parts
)
295 physmap_flash_data
.nr_parts
= num_parts
;
296 physmap_flash_data
.parts
= parts
;
301 static int __init
physmap_init(void)
305 err
= platform_driver_register(&physmap_flash_driver
);
306 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
308 platform_device_register(&physmap_flash
);
314 static void __exit
physmap_exit(void)
316 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
317 platform_device_unregister(&physmap_flash
);
319 platform_driver_unregister(&physmap_flash_driver
);
322 module_init(physmap_init
);
323 module_exit(physmap_exit
);
325 MODULE_LICENSE("GPL");
326 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
327 MODULE_DESCRIPTION("Generic configurable MTD map driver");
329 /* legacy platform drivers can't hotplug or coldplg */
330 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
331 /* work with hotplug and coldplug */
332 MODULE_ALIAS("platform:physmap-flash");