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/init.h>
14 #include <linux/idr.h>
15
16 #define DRIVER_NAME "tifm_core"
17 #define DRIVER_VERSION "0.8"
18
19 static struct workqueue_struct *workqueue;
20 static DEFINE_IDR(tifm_adapter_idr);
21 static DEFINE_SPINLOCK(tifm_adapter_lock);
22
23 static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
24 {
25 const char *card_type_name[3][3] = {
26 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
27 { "XD", "MS", "SD"},
28 { "xd", "ms", "sd"}
29 };
30
31 if (nt > 2 || type < 1 || type > 3)
32 return NULL;
33 return card_type_name[nt][type - 1];
34 }
35
36 static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
37 {
38 if (sock->type == id->type)
39 return 1;
40 return 0;
41 }
42
43 static int tifm_bus_match(struct device *dev, struct device_driver *drv)
44 {
45 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
46 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
47 driver);
48 struct tifm_device_id *ids = fm_drv->id_table;
49
50 if (ids) {
51 while (ids->type) {
52 if (tifm_dev_match(sock, ids))
53 return 1;
54 ++ids;
55 }
56 }
57 return 0;
58 }
59
60 static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
61 {
62 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
63
64 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
65 return -ENOMEM;
66
67 return 0;
68 }
69
70 static int tifm_device_probe(struct device *dev)
71 {
72 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
73 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
74 driver);
75 int rc = -ENODEV;
76
77 get_device(dev);
78 if (dev->driver && drv->probe) {
79 rc = drv->probe(sock);
80 if (!rc)
81 return 0;
82 }
83 put_device(dev);
84 return rc;
85 }
86
87 static void tifm_dummy_event(struct tifm_dev *sock)
88 {
89 return;
90 }
91
92 static int tifm_device_remove(struct device *dev)
93 {
94 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
95 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
96 driver);
97
98 if (dev->driver && drv->remove) {
99 sock->card_event = tifm_dummy_event;
100 sock->data_event = tifm_dummy_event;
101 drv->remove(sock);
102 sock->dev.driver = NULL;
103 }
104
105 put_device(dev);
106 return 0;
107 }
108
109 #ifdef CONFIG_PM
110
111 static int tifm_device_suspend(struct device *dev, pm_message_t state)
112 {
113 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
114 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
115 driver);
116
117 if (dev->driver && drv->suspend)
118 return drv->suspend(sock, state);
119 return 0;
120 }
121
122 static int tifm_device_resume(struct device *dev)
123 {
124 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
125 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
126 driver);
127
128 if (dev->driver && drv->resume)
129 return drv->resume(sock);
130 return 0;
131 }
132
133 #else
134
135 #define tifm_device_suspend NULL
136 #define tifm_device_resume NULL
137
138 #endif /* CONFIG_PM */
139
140 static ssize_t type_show(struct device *dev, struct device_attribute *attr,
141 char *buf)
142 {
143 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
144 return sprintf(buf, "%x", sock->type);
145 }
146
147 static struct device_attribute tifm_dev_attrs[] = {
148 __ATTR(type, S_IRUGO, type_show, NULL),
149 __ATTR_NULL
150 };
151
152 static struct bus_type tifm_bus_type = {
153 .name = "tifm",
154 .dev_attrs = tifm_dev_attrs,
155 .match = tifm_bus_match,
156 .uevent = tifm_uevent,
157 .probe = tifm_device_probe,
158 .remove = tifm_device_remove,
159 .suspend = tifm_device_suspend,
160 .resume = tifm_device_resume
161 };
162
163 static void tifm_free(struct device *dev)
164 {
165 struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
166
167 kfree(fm);
168 }
169
170 static struct class tifm_adapter_class = {
171 .name = "tifm_adapter",
172 .dev_release = tifm_free
173 };
174
175 struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
176 struct device *dev)
177 {
178 struct tifm_adapter *fm;
179
180 fm = kzalloc(sizeof(struct tifm_adapter)
181 + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
182 if (fm) {
183 fm->dev.class = &tifm_adapter_class;
184 fm->dev.parent = dev;
185 device_initialize(&fm->dev);
186 spin_lock_init(&fm->lock);
187 fm->num_sockets = num_sockets;
188 }
189 return fm;
190 }
191 EXPORT_SYMBOL(tifm_alloc_adapter);
192
193 int tifm_add_adapter(struct tifm_adapter *fm)
194 {
195 int rc;
196
197 if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
198 return -ENOMEM;
199
200 spin_lock(&tifm_adapter_lock);
201 rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
202 spin_unlock(&tifm_adapter_lock);
203 if (rc)
204 return rc;
205
206 snprintf(fm->dev.bus_id, BUS_ID_SIZE, "tifm%u", fm->id);
207 rc = device_add(&fm->dev);
208 if (rc) {
209 spin_lock(&tifm_adapter_lock);
210 idr_remove(&tifm_adapter_idr, fm->id);
211 spin_unlock(&tifm_adapter_lock);
212 }
213
214 return rc;
215 }
216 EXPORT_SYMBOL(tifm_add_adapter);
217
218 void tifm_remove_adapter(struct tifm_adapter *fm)
219 {
220 unsigned int cnt;
221
222 flush_workqueue(workqueue);
223 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
224 if (fm->sockets[cnt])
225 device_unregister(&fm->sockets[cnt]->dev);
226 }
227
228 spin_lock(&tifm_adapter_lock);
229 idr_remove(&tifm_adapter_idr, fm->id);
230 spin_unlock(&tifm_adapter_lock);
231 device_del(&fm->dev);
232 }
233 EXPORT_SYMBOL(tifm_remove_adapter);
234
235 void tifm_free_adapter(struct tifm_adapter *fm)
236 {
237 put_device(&fm->dev);
238 }
239 EXPORT_SYMBOL(tifm_free_adapter);
240
241 void tifm_free_device(struct device *dev)
242 {
243 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
244 kfree(sock);
245 }
246 EXPORT_SYMBOL(tifm_free_device);
247
248 struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
249 unsigned char type)
250 {
251 struct tifm_dev *sock = NULL;
252
253 if (!tifm_media_type_name(type, 0))
254 return sock;
255
256 sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
257 if (sock) {
258 spin_lock_init(&sock->lock);
259 sock->type = type;
260 sock->socket_id = id;
261 sock->card_event = tifm_dummy_event;
262 sock->data_event = tifm_dummy_event;
263
264 sock->dev.parent = fm->dev.parent;
265 sock->dev.bus = &tifm_bus_type;
266 sock->dev.dma_mask = fm->dev.parent->dma_mask;
267 sock->dev.release = tifm_free_device;
268
269 snprintf(sock->dev.bus_id, BUS_ID_SIZE,
270 "tifm_%s%u:%u", tifm_media_type_name(type, 2),
271 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_freezeable_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);
368
|
This page was automatically generated by the
LXR engine.
|