2 * tifm_core.c - TI FlashMedia driver
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/tifm.h>
13 #include <linux/init.h>
14 #include <linux/idr.h>
16 #define DRIVER_NAME "tifm_core"
17 #define DRIVER_VERSION "0.8"
19 static struct workqueue_struct
*workqueue
;
20 static DEFINE_IDR(tifm_adapter_idr
);
21 static DEFINE_SPINLOCK(tifm_adapter_lock
);
23 static const char *tifm_media_type_name(unsigned char type
, unsigned char nt
)
25 const char *card_type_name
[3][3] = {
26 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
31 if (nt
> 2 || type
< 1 || type
> 3)
33 return card_type_name
[nt
][type
- 1];
36 static int tifm_dev_match(struct tifm_dev
*sock
, struct tifm_device_id
*id
)
38 if (sock
->type
== id
->type
)
43 static int tifm_bus_match(struct device
*dev
, struct device_driver
*drv
)
45 struct tifm_dev
*sock
= container_of(dev
, struct tifm_dev
, dev
);
46 struct tifm_driver
*fm_drv
= container_of(drv
, struct tifm_driver
,
48 struct tifm_device_id
*ids
= fm_drv
->id_table
;
52 if (tifm_dev_match(sock
, ids
))
60 static int tifm_uevent(struct device
*dev
, char **envp
, int num_envp
,
61 char *buffer
, int buffer_size
)
63 struct tifm_dev
*sock
= container_of(dev
, struct tifm_dev
, dev
);
67 if (add_uevent_var(envp
, num_envp
, &i
, buffer
, buffer_size
, &length
,
69 tifm_media_type_name(sock
->type
, 1)))
75 static int tifm_device_probe(struct device
*dev
)
77 struct tifm_dev
*sock
= container_of(dev
, struct tifm_dev
, dev
);
78 struct tifm_driver
*drv
= container_of(dev
->driver
, struct tifm_driver
,
83 if (dev
->driver
&& drv
->probe
) {
84 rc
= drv
->probe(sock
);
92 static void tifm_dummy_event(struct tifm_dev
*sock
)
97 static int tifm_device_remove(struct device
*dev
)
99 struct tifm_dev
*sock
= container_of(dev
, struct tifm_dev
, dev
);
100 struct tifm_driver
*drv
= container_of(dev
->driver
, struct tifm_driver
,
103 if (dev
->driver
&& drv
->remove
) {
104 sock
->card_event
= tifm_dummy_event
;
105 sock
->data_event
= tifm_dummy_event
;
107 sock
->dev
.driver
= NULL
;
116 static int tifm_device_suspend(struct device
*dev
, pm_message_t state
)
118 struct tifm_dev
*fm_dev
= container_of(dev
, struct tifm_dev
, dev
);
119 struct tifm_driver
*drv
= container_of(dev
->driver
, struct tifm_driver
,
122 if (dev
->driver
&& drv
->suspend
)
123 return drv
->suspend(fm_dev
, state
);
127 static int tifm_device_resume(struct device
*dev
)
129 struct tifm_dev
*fm_dev
= container_of(dev
, struct tifm_dev
, dev
);
130 struct tifm_driver
*drv
= container_of(dev
->driver
, struct tifm_driver
,
133 if (dev
->driver
&& drv
->resume
)
134 return drv
->resume(fm_dev
);
140 #define tifm_device_suspend NULL
141 #define tifm_device_resume NULL
143 #endif /* CONFIG_PM */
145 static struct bus_type tifm_bus_type
= {
147 .match
= tifm_bus_match
,
148 .uevent
= tifm_uevent
,
149 .probe
= tifm_device_probe
,
150 .remove
= tifm_device_remove
,
151 .suspend
= tifm_device_suspend
,
152 .resume
= tifm_device_resume
155 static void tifm_free(struct class_device
*cdev
)
157 struct tifm_adapter
*fm
= container_of(cdev
, struct tifm_adapter
, cdev
);
162 static struct class tifm_adapter_class
= {
163 .name
= "tifm_adapter",
167 struct tifm_adapter
*tifm_alloc_adapter(unsigned int num_sockets
,
170 struct tifm_adapter
*fm
;
172 fm
= kzalloc(sizeof(struct tifm_adapter
)
173 + sizeof(struct tifm_dev
*) * num_sockets
, GFP_KERNEL
);
175 fm
->cdev
.class = &tifm_adapter_class
;
177 class_device_initialize(&fm
->cdev
);
178 spin_lock_init(&fm
->lock
);
179 fm
->num_sockets
= num_sockets
;
183 EXPORT_SYMBOL(tifm_alloc_adapter
);
185 int tifm_add_adapter(struct tifm_adapter
*fm
)
189 if (!idr_pre_get(&tifm_adapter_idr
, GFP_KERNEL
))
192 spin_lock(&tifm_adapter_lock
);
193 rc
= idr_get_new(&tifm_adapter_idr
, fm
, &fm
->id
);
194 spin_unlock(&tifm_adapter_lock
);
198 snprintf(fm
->cdev
.class_id
, BUS_ID_SIZE
, "tifm%u", fm
->id
);
199 rc
= class_device_add(&fm
->cdev
);
201 spin_lock(&tifm_adapter_lock
);
202 idr_remove(&tifm_adapter_idr
, fm
->id
);
203 spin_unlock(&tifm_adapter_lock
);
208 EXPORT_SYMBOL(tifm_add_adapter
);
210 void tifm_remove_adapter(struct tifm_adapter
*fm
)
214 flush_workqueue(workqueue
);
215 for (cnt
= 0; cnt
< fm
->num_sockets
; ++cnt
) {
216 if (fm
->sockets
[cnt
])
217 device_unregister(&fm
->sockets
[cnt
]->dev
);
220 spin_lock(&tifm_adapter_lock
);
221 idr_remove(&tifm_adapter_idr
, fm
->id
);
222 spin_unlock(&tifm_adapter_lock
);
223 class_device_del(&fm
->cdev
);
225 EXPORT_SYMBOL(tifm_remove_adapter
);
227 void tifm_free_adapter(struct tifm_adapter
*fm
)
229 class_device_put(&fm
->cdev
);
231 EXPORT_SYMBOL(tifm_free_adapter
);
233 void tifm_free_device(struct device
*dev
)
235 struct tifm_dev
*fm_dev
= container_of(dev
, struct tifm_dev
, dev
);
238 EXPORT_SYMBOL(tifm_free_device
);
240 struct tifm_dev
*tifm_alloc_device(struct tifm_adapter
*fm
)
242 struct tifm_dev
*dev
= kzalloc(sizeof(struct tifm_dev
), GFP_KERNEL
);
245 spin_lock_init(&dev
->lock
);
247 dev
->dev
.parent
= fm
->cdev
.dev
;
248 dev
->dev
.bus
= &tifm_bus_type
;
249 dev
->dev
.release
= tifm_free_device
;
250 dev
->card_event
= tifm_dummy_event
;
251 dev
->data_event
= tifm_dummy_event
;
255 EXPORT_SYMBOL(tifm_alloc_device
);
257 void tifm_eject(struct tifm_dev
*sock
)
259 struct tifm_adapter
*fm
= dev_get_drvdata(sock
->dev
.parent
);
262 EXPORT_SYMBOL(tifm_eject
);
264 int tifm_map_sg(struct tifm_dev
*sock
, struct scatterlist
*sg
, int nents
,
267 return pci_map_sg(to_pci_dev(sock
->dev
.parent
), sg
, nents
, direction
);
269 EXPORT_SYMBOL(tifm_map_sg
);
271 void tifm_unmap_sg(struct tifm_dev
*sock
, struct scatterlist
*sg
, int nents
,
274 pci_unmap_sg(to_pci_dev(sock
->dev
.parent
), sg
, nents
, direction
);
276 EXPORT_SYMBOL(tifm_unmap_sg
);
278 void tifm_queue_work(struct work_struct
*work
)
280 queue_work(workqueue
, work
);
282 EXPORT_SYMBOL(tifm_queue_work
);
284 int tifm_register_driver(struct tifm_driver
*drv
)
286 drv
->driver
.bus
= &tifm_bus_type
;
288 return driver_register(&drv
->driver
);
290 EXPORT_SYMBOL(tifm_register_driver
);
292 void tifm_unregister_driver(struct tifm_driver
*drv
)
294 driver_unregister(&drv
->driver
);
296 EXPORT_SYMBOL(tifm_unregister_driver
);
298 static int __init
tifm_init(void)
302 workqueue
= create_freezeable_workqueue("tifm");
306 rc
= bus_register(&tifm_bus_type
);
311 rc
= class_register(&tifm_adapter_class
);
315 bus_unregister(&tifm_bus_type
);
318 destroy_workqueue(workqueue
);
323 static void __exit
tifm_exit(void)
325 class_unregister(&tifm_adapter_class
);
326 bus_unregister(&tifm_bus_type
);
327 destroy_workqueue(workqueue
);
330 subsys_initcall(tifm_init
);
331 module_exit(tifm_exit
);
333 MODULE_LICENSE("GPL");
334 MODULE_AUTHOR("Alex Dubov");
335 MODULE_DESCRIPTION("TI FlashMedia core driver");
336 MODULE_LICENSE("GPL");
337 MODULE_VERSION(DRIVER_VERSION
);