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
35 static int physmap_flash_remove(struct platform_device
*dev
)
37 struct physmap_flash_info
*info
;
38 struct physmap_flash_data
*physmap_data
;
41 info
= platform_get_drvdata(dev
);
44 platform_set_drvdata(dev
, NULL
);
46 physmap_data
= dev
->dev
.platform_data
;
48 #ifdef CONFIG_MTD_CONCAT
49 if (info
->cmtd
!= info
->mtd
[0]) {
50 del_mtd_device(info
->cmtd
);
51 mtd_concat_destroy(info
->cmtd
);
55 for (i
= 0; i
< MAX_RESOURCES
; i
++) {
56 if (info
->mtd
[i
] != NULL
) {
57 #ifdef CONFIG_MTD_PARTITIONS
58 if (info
->nr_parts
|| physmap_data
->nr_parts
)
59 del_mtd_partitions(info
->mtd
[i
]);
61 del_mtd_device(info
->mtd
[i
]);
63 del_mtd_device(info
->mtd
[i
]);
65 map_destroy(info
->mtd
[i
]);
71 static const char *rom_probe_types
[] = {
77 #ifdef CONFIG_MTD_PARTITIONS
78 static const char *part_probe_types
[] = { "cmdlinepart", "RedBoot", NULL
};
81 static int physmap_flash_probe(struct platform_device
*dev
)
83 struct physmap_flash_data
*physmap_data
;
84 struct physmap_flash_info
*info
;
85 const char **probe_type
;
88 int devices_found
= 0;
89 #ifdef CONFIG_MTD_PARTITIONS
90 struct mtd_partition
*parts
;
93 physmap_data
= dev
->dev
.platform_data
;
94 if (physmap_data
== NULL
)
97 info
= devm_kzalloc(&dev
->dev
, sizeof(struct physmap_flash_info
),
104 platform_set_drvdata(dev
, info
);
106 for (i
= 0; i
< dev
->num_resources
; i
++) {
107 printk(KERN_NOTICE
"physmap platform flash device: %.8llx at %.8llx\n",
108 (unsigned long long)(dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1),
109 (unsigned long long)dev
->resource
[i
].start
);
111 if (!devm_request_mem_region(&dev
->dev
,
112 dev
->resource
[i
].start
,
113 dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1,
114 dev_name(&dev
->dev
))) {
115 dev_err(&dev
->dev
, "Could not reserve memory region\n");
120 info
->map
[i
].name
= dev_name(&dev
->dev
);
121 info
->map
[i
].phys
= dev
->resource
[i
].start
;
122 info
->map
[i
].size
= dev
->resource
[i
].end
- dev
->resource
[i
].start
+ 1;
123 info
->map
[i
].bankwidth
= physmap_data
->width
;
124 info
->map
[i
].set_vpp
= physmap_data
->set_vpp
;
125 info
->map
[i
].pfow_base
= physmap_data
->pfow_base
;
127 info
->map
[i
].virt
= devm_ioremap(&dev
->dev
, info
->map
[i
].phys
,
129 if (info
->map
[i
].virt
== NULL
) {
130 dev_err(&dev
->dev
, "Failed to ioremap flash region\n");
135 simple_map_init(&info
->map
[i
]);
137 probe_type
= rom_probe_types
;
138 for (; info
->mtd
[i
] == NULL
&& *probe_type
!= NULL
; probe_type
++)
139 info
->mtd
[i
] = do_map_probe(*probe_type
, &info
->map
[i
]);
140 if (info
->mtd
[i
] == NULL
) {
141 dev_err(&dev
->dev
, "map_probe failed\n");
147 info
->mtd
[i
]->owner
= THIS_MODULE
;
150 if (devices_found
== 1) {
151 info
->cmtd
= info
->mtd
[0];
152 } else if (devices_found
> 1) {
154 * We detected multiple devices. Concatenate them together.
156 #ifdef CONFIG_MTD_CONCAT
157 info
->cmtd
= mtd_concat_create(info
->mtd
, devices_found
, dev_name(&dev
->dev
));
158 if (info
->cmtd
== NULL
)
161 printk(KERN_ERR
"physmap-flash: multiple devices "
162 "found but MTD concat support disabled.\n");
169 #ifdef CONFIG_MTD_PARTITIONS
170 err
= parse_mtd_partitions(info
->cmtd
, part_probe_types
, &parts
, 0);
172 add_mtd_partitions(info
->cmtd
, parts
, err
);
177 if (physmap_data
->nr_parts
) {
178 printk(KERN_NOTICE
"Using physmap partition information\n");
179 add_mtd_partitions(info
->cmtd
, physmap_data
->parts
,
180 physmap_data
->nr_parts
);
185 add_mtd_device(info
->cmtd
);
189 physmap_flash_remove(dev
);
194 static int physmap_flash_suspend(struct platform_device
*dev
, pm_message_t state
)
196 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
200 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
201 if (info
->mtd
[i
]->suspend
) {
202 ret
= info
->mtd
[i
]->suspend(info
->mtd
[i
]);
209 for (--i
; i
>= 0; --i
)
210 if (info
->mtd
[i
]->suspend
) {
211 BUG_ON(!info
->mtd
[i
]->resume
);
212 info
->mtd
[i
]->resume(info
->mtd
[i
]);
218 static int physmap_flash_resume(struct platform_device
*dev
)
220 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
223 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
224 if (info
->mtd
[i
]->resume
)
225 info
->mtd
[i
]->resume(info
->mtd
[i
]);
230 static void physmap_flash_shutdown(struct platform_device
*dev
)
232 struct physmap_flash_info
*info
= platform_get_drvdata(dev
);
235 for (i
= 0; i
< MAX_RESOURCES
&& info
->mtd
[i
]; i
++)
236 if (info
->mtd
[i
]->suspend
&& info
->mtd
[i
]->resume
)
237 if (info
->mtd
[i
]->suspend(info
->mtd
[i
]) == 0)
238 info
->mtd
[i
]->resume(info
->mtd
[i
]);
241 #define physmap_flash_suspend NULL
242 #define physmap_flash_resume NULL
243 #define physmap_flash_shutdown NULL
246 static struct platform_driver physmap_flash_driver
= {
247 .probe
= physmap_flash_probe
,
248 .remove
= physmap_flash_remove
,
249 .suspend
= physmap_flash_suspend
,
250 .resume
= physmap_flash_resume
,
251 .shutdown
= physmap_flash_shutdown
,
253 .name
= "physmap-flash",
254 .owner
= THIS_MODULE
,
259 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
260 static struct physmap_flash_data physmap_flash_data
= {
261 .width
= CONFIG_MTD_PHYSMAP_BANKWIDTH
,
264 static struct resource physmap_flash_resource
= {
265 .start
= CONFIG_MTD_PHYSMAP_START
,
266 .end
= CONFIG_MTD_PHYSMAP_START
+ CONFIG_MTD_PHYSMAP_LEN
- 1,
267 .flags
= IORESOURCE_MEM
,
270 static struct platform_device physmap_flash
= {
271 .name
= "physmap-flash",
274 .platform_data
= &physmap_flash_data
,
277 .resource
= &physmap_flash_resource
,
280 void physmap_configure(unsigned long addr
, unsigned long size
,
281 int bankwidth
, void (*set_vpp
)(struct map_info
*, int))
283 physmap_flash_resource
.start
= addr
;
284 physmap_flash_resource
.end
= addr
+ size
- 1;
285 physmap_flash_data
.width
= bankwidth
;
286 physmap_flash_data
.set_vpp
= set_vpp
;
289 #ifdef CONFIG_MTD_PARTITIONS
290 void physmap_set_partitions(struct mtd_partition
*parts
, int num_parts
)
292 physmap_flash_data
.nr_parts
= num_parts
;
293 physmap_flash_data
.parts
= parts
;
298 static int __init
physmap_init(void)
302 err
= platform_driver_register(&physmap_flash_driver
);
303 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
305 platform_device_register(&physmap_flash
);
311 static void __exit
physmap_exit(void)
313 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
314 platform_device_unregister(&physmap_flash
);
316 platform_driver_unregister(&physmap_flash_driver
);
319 module_init(physmap_init
);
320 module_exit(physmap_exit
);
322 MODULE_LICENSE("GPL");
323 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
324 MODULE_DESCRIPTION("Generic configurable MTD map driver");
326 /* legacy platform drivers can't hotplug or coldplg */
327 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
328 /* work with hotplug and coldplug */
329 MODULE_ALIAS("platform:physmap-flash");