drivers: misc: ti-st: apply wl12xx patch from TI
[linux-2.6.git] / drivers / misc / tifm_core.c
1 /*
2  *  tifm_core.c - TI FlashMedia driver
3  *
4  *  Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
5  *
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.
9  *
10  */
11
12 #include <linux/tifm.h>
13 #include <linux/slab.h>
14 #include <linux/init.h>
15 #include <linux/idr.h>
16
17 #define DRIVER_NAME "tifm_core"
18 #define DRIVER_VERSION "0.8"
19
20 static struct workqueue_struct *workqueue;
21 static DEFINE_IDR(tifm_adapter_idr);
22 static DEFINE_SPINLOCK(tifm_adapter_lock);
23
24 static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
25 {
26         const char *card_type_name[3][3] = {
27                 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
28                 { "XD", "MS", "SD"},
29                 { "xd", "ms", "sd"}
30         };
31
32         if (nt > 2 || type < 1 || type > 3)
33                 return NULL;
34         return card_type_name[nt][type - 1];
35 }
36
37 static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
38 {
39         if (sock->type == id->type)
40                 return 1;
41         return 0;
42 }
43
44 static int tifm_bus_match(struct device *dev, struct device_driver *drv)
45 {
46         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
47         struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
48                                                   driver);
49         struct tifm_device_id *ids = fm_drv->id_table;
50
51         if (ids) {
52                 while (ids->type) {
53                         if (tifm_dev_match(sock, ids))
54                                 return 1;
55                         ++ids;
56                 }
57         }
58         return 0;
59 }
60
61 static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
62 {
63         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
64
65         if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
66                 return -ENOMEM;
67
68         return 0;
69 }
70
71 static int tifm_device_probe(struct device *dev)
72 {
73         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
74         struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
75                                                driver);
76         int rc = -ENODEV;
77
78         get_device(dev);
79         if (dev->driver && drv->probe) {
80                 rc = drv->probe(sock);
81                 if (!rc)
82                         return 0;
83         }
84         put_device(dev);
85         return rc;
86 }
87
88 static void tifm_dummy_event(struct tifm_dev *sock)
89 {
90         return;
91 }
92
93 static int tifm_device_remove(struct device *dev)
94 {
95         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
96         struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
97                                                driver);
98
99         if (dev->driver && drv->remove) {
100                 sock->card_event = tifm_dummy_event;
101                 sock->data_event = tifm_dummy_event;
102                 drv->remove(sock);
103                 sock->dev.driver = NULL;
104         }
105
106         put_device(dev);
107         return 0;
108 }
109
110 #ifdef CONFIG_PM
111
112 static int tifm_device_suspend(struct device *dev, pm_message_t state)
113 {
114         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
115         struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
116                                                driver);
117
118         if (dev->driver && drv->suspend)
119                 return drv->suspend(sock, state);
120         return 0;
121 }
122
123 static int tifm_device_resume(struct device *dev)
124 {
125         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
126         struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
127                                                driver);
128
129         if (dev->driver && drv->resume)
130                 return drv->resume(sock);
131         return 0;
132 }
133
134 #else
135
136 #define tifm_device_suspend NULL
137 #define tifm_device_resume NULL
138
139 #endif /* CONFIG_PM */
140
141 static ssize_t type_show(struct device *dev, struct device_attribute *attr,
142                          char *buf)
143 {
144         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
145         return sprintf(buf, "%x", sock->type);
146 }
147
148 static struct device_attribute tifm_dev_attrs[] = {
149         __ATTR(type, S_IRUGO, type_show, NULL),
150         __ATTR_NULL
151 };
152
153 static struct bus_type tifm_bus_type = {
154         .name      = "tifm",
155         .dev_attrs = tifm_dev_attrs,
156         .match     = tifm_bus_match,
157         .uevent    = tifm_uevent,
158         .probe     = tifm_device_probe,
159         .remove    = tifm_device_remove,
160         .suspend   = tifm_device_suspend,
161         .resume    = tifm_device_resume
162 };
163
164 static void tifm_free(struct device *dev)
165 {
166         struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
167
168         kfree(fm);
169 }
170
171 static struct class tifm_adapter_class = {
172         .name    = "tifm_adapter",
173         .dev_release = tifm_free
174 };
175
176 struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
177                                         struct device *dev)
178 {
179         struct tifm_adapter *fm;
180
181         fm = kzalloc(sizeof(struct tifm_adapter)
182                      + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
183         if (fm) {
184                 fm->dev.class = &tifm_adapter_class;
185                 fm->dev.parent = dev;
186                 device_initialize(&fm->dev);
187                 spin_lock_init(&fm->lock);
188                 fm->num_sockets = num_sockets;
189         }
190         return fm;
191 }
192 EXPORT_SYMBOL(tifm_alloc_adapter);
193
194 int tifm_add_adapter(struct tifm_adapter *fm)
195 {
196         int rc;
197
198         if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
199                 return -ENOMEM;
200
201         spin_lock(&tifm_adapter_lock);
202         rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
203         spin_unlock(&tifm_adapter_lock);
204         if (rc)
205                 return rc;
206
207         dev_set_name(&fm->dev, "tifm%u", fm->id);
208         rc = device_add(&fm->dev);
209         if (rc) {
210                 spin_lock(&tifm_adapter_lock);
211                 idr_remove(&tifm_adapter_idr, fm->id);
212                 spin_unlock(&tifm_adapter_lock);
213         }
214
215         return rc;
216 }
217 EXPORT_SYMBOL(tifm_add_adapter);
218
219 void tifm_remove_adapter(struct tifm_adapter *fm)
220 {
221         unsigned int cnt;
222
223         flush_workqueue(workqueue);
224         for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
225                 if (fm->sockets[cnt])
226                         device_unregister(&fm->sockets[cnt]->dev);
227         }
228
229         spin_lock(&tifm_adapter_lock);
230         idr_remove(&tifm_adapter_idr, fm->id);
231         spin_unlock(&tifm_adapter_lock);
232         device_del(&fm->dev);
233 }
234 EXPORT_SYMBOL(tifm_remove_adapter);
235
236 void tifm_free_adapter(struct tifm_adapter *fm)
237 {
238         put_device(&fm->dev);
239 }
240 EXPORT_SYMBOL(tifm_free_adapter);
241
242 void tifm_free_device(struct device *dev)
243 {
244         struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
245         kfree(sock);
246 }
247 EXPORT_SYMBOL(tifm_free_device);
248
249 struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
250                                    unsigned char type)
251 {
252         struct tifm_dev *sock = NULL;
253
254         if (!tifm_media_type_name(type, 0))
255                 return sock;
256
257         sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
258         if (sock) {
259                 spin_lock_init(&sock->lock);
260                 sock->type = type;
261                 sock->socket_id = id;
262                 sock->card_event = tifm_dummy_event;
263                 sock->data_event = tifm_dummy_event;
264
265                 sock->dev.parent = fm->dev.parent;
266                 sock->dev.bus = &tifm_bus_type;
267                 sock->dev.dma_mask = fm->dev.parent->dma_mask;
268                 sock->dev.release = tifm_free_device;
269
270                 dev_set_name(&sock->dev, "tifm_%s%u:%u",
271                              tifm_media_type_name(type, 2), fm->id, id);
272                 printk(KERN_INFO DRIVER_NAME
273                        ": %s card detected in socket %u:%u\n",
274                        tifm_media_type_name(type, 0), fm->id, id);
275         }
276         return sock;
277 }
278 EXPORT_SYMBOL(tifm_alloc_device);
279
280 void tifm_eject(struct tifm_dev *sock)
281 {
282         struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
283         fm->eject(fm, sock);
284 }
285 EXPORT_SYMBOL(tifm_eject);
286
287 int tifm_has_ms_pif(struct tifm_dev *sock)
288 {
289         struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
290         return fm->has_ms_pif(fm, sock);
291 }
292 EXPORT_SYMBOL(tifm_has_ms_pif);
293
294 int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
295                 int direction)
296 {
297         return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
298 }
299 EXPORT_SYMBOL(tifm_map_sg);
300
301 void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
302                    int direction)
303 {
304         pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
305 }
306 EXPORT_SYMBOL(tifm_unmap_sg);
307
308 void tifm_queue_work(struct work_struct *work)
309 {
310         queue_work(workqueue, work);
311 }
312 EXPORT_SYMBOL(tifm_queue_work);
313
314 int tifm_register_driver(struct tifm_driver *drv)
315 {
316         drv->driver.bus = &tifm_bus_type;
317
318         return driver_register(&drv->driver);
319 }
320 EXPORT_SYMBOL(tifm_register_driver);
321
322 void tifm_unregister_driver(struct tifm_driver *drv)
323 {
324         driver_unregister(&drv->driver);
325 }
326 EXPORT_SYMBOL(tifm_unregister_driver);
327
328 static int __init tifm_init(void)
329 {
330         int rc;
331
332         workqueue = create_freezable_workqueue("tifm");
333         if (!workqueue)
334                 return -ENOMEM;
335
336         rc = bus_register(&tifm_bus_type);
337
338         if (rc)
339                 goto err_out_wq;
340
341         rc = class_register(&tifm_adapter_class);
342         if (!rc)
343                 return 0;
344
345         bus_unregister(&tifm_bus_type);
346
347 err_out_wq:
348         destroy_workqueue(workqueue);
349
350         return rc;
351 }
352
353 static void __exit tifm_exit(void)
354 {
355         class_unregister(&tifm_adapter_class);
356         bus_unregister(&tifm_bus_type);
357         destroy_workqueue(workqueue);
358 }
359
360 subsys_initcall(tifm_init);
361 module_exit(tifm_exit);
362
363 MODULE_LICENSE("GPL");
364 MODULE_AUTHOR("Alex Dubov");
365 MODULE_DESCRIPTION("TI FlashMedia core driver");
366 MODULE_LICENSE("GPL");
367 MODULE_VERSION(DRIVER_VERSION);