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12#include <linux/tifm.h>
13#include <linux/slab.h>
14#include <linux/init.h>
15#include <linux/idr.h>
16#include <linux/module.h>
17
18#define DRIVER_NAME "tifm_core"
19#define DRIVER_VERSION "0.8"
20
21static struct workqueue_struct *workqueue;
22static DEFINE_IDR(tifm_adapter_idr);
23static DEFINE_SPINLOCK(tifm_adapter_lock);
24
25static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
26{
27 const char *card_type_name[3][3] = {
28 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
29 { "XD", "MS", "SD"},
30 { "xd", "ms", "sd"}
31 };
32
33 if (nt > 2 || type < 1 || type > 3)
34 return NULL;
35 return card_type_name[nt][type - 1];
36}
37
38static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
39{
40 if (sock->type == id->type)
41 return 1;
42 return 0;
43}
44
45static int tifm_bus_match(struct device *dev, struct device_driver *drv)
46{
47 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
48 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
49 driver);
50 struct tifm_device_id *ids = fm_drv->id_table;
51
52 if (ids) {
53 while (ids->type) {
54 if (tifm_dev_match(sock, ids))
55 return 1;
56 ++ids;
57 }
58 }
59 return 0;
60}
61
62static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
63{
64 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
65
66 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
67 return -ENOMEM;
68
69 return 0;
70}
71
72static int tifm_device_probe(struct device *dev)
73{
74 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
75 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
76 driver);
77 int rc = -ENODEV;
78
79 get_device(dev);
80 if (dev->driver && drv->probe) {
81 rc = drv->probe(sock);
82 if (!rc)
83 return 0;
84 }
85 put_device(dev);
86 return rc;
87}
88
89static void tifm_dummy_event(struct tifm_dev *sock)
90{
91 return;
92}
93
94static int tifm_device_remove(struct device *dev)
95{
96 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
97 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
98 driver);
99
100 if (dev->driver && drv->remove) {
101 sock->card_event = tifm_dummy_event;
102 sock->data_event = tifm_dummy_event;
103 drv->remove(sock);
104 sock->dev.driver = NULL;
105 }
106
107 put_device(dev);
108 return 0;
109}
110
111#ifdef CONFIG_PM
112
113static int tifm_device_suspend(struct device *dev, pm_message_t state)
114{
115 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
116 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
117 driver);
118
119 if (dev->driver && drv->suspend)
120 return drv->suspend(sock, state);
121 return 0;
122}
123
124static int tifm_device_resume(struct device *dev)
125{
126 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
127 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
128 driver);
129
130 if (dev->driver && drv->resume)
131 return drv->resume(sock);
132 return 0;
133}
134
135#else
136
137#define tifm_device_suspend NULL
138#define tifm_device_resume NULL
139
140#endif
141
142static ssize_t type_show(struct device *dev, struct device_attribute *attr,
143 char *buf)
144{
145 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
146 return sprintf(buf, "%x", sock->type);
147}
148static DEVICE_ATTR_RO(type);
149
150static struct attribute *tifm_dev_attrs[] = {
151 &dev_attr_type.attr,
152 NULL,
153};
154ATTRIBUTE_GROUPS(tifm_dev);
155
156static struct bus_type tifm_bus_type = {
157 .name = "tifm",
158 .dev_groups = tifm_dev_groups,
159 .match = tifm_bus_match,
160 .uevent = tifm_uevent,
161 .probe = tifm_device_probe,
162 .remove = tifm_device_remove,
163 .suspend = tifm_device_suspend,
164 .resume = tifm_device_resume
165};
166
167static void tifm_free(struct device *dev)
168{
169 struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
170
171 kfree(fm);
172}
173
174static struct class tifm_adapter_class = {
175 .name = "tifm_adapter",
176 .dev_release = tifm_free
177};
178
179struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
180 struct device *dev)
181{
182 struct tifm_adapter *fm;
183
184 fm = kzalloc(sizeof(struct tifm_adapter)
185 + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
186 if (fm) {
187 fm->dev.class = &tifm_adapter_class;
188 fm->dev.parent = dev;
189 device_initialize(&fm->dev);
190 spin_lock_init(&fm->lock);
191 fm->num_sockets = num_sockets;
192 }
193 return fm;
194}
195EXPORT_SYMBOL(tifm_alloc_adapter);
196
197int tifm_add_adapter(struct tifm_adapter *fm)
198{
199 int rc;
200
201 idr_preload(GFP_KERNEL);
202 spin_lock(&tifm_adapter_lock);
203 rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
204 if (rc >= 0)
205 fm->id = rc;
206 spin_unlock(&tifm_adapter_lock);
207 idr_preload_end();
208 if (rc < 0)
209 return rc;
210
211 dev_set_name(&fm->dev, "tifm%u", fm->id);
212 rc = device_add(&fm->dev);
213 if (rc) {
214 spin_lock(&tifm_adapter_lock);
215 idr_remove(&tifm_adapter_idr, fm->id);
216 spin_unlock(&tifm_adapter_lock);
217 }
218
219 return rc;
220}
221EXPORT_SYMBOL(tifm_add_adapter);
222
223void tifm_remove_adapter(struct tifm_adapter *fm)
224{
225 unsigned int cnt;
226
227 flush_workqueue(workqueue);
228 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
229 if (fm->sockets[cnt])
230 device_unregister(&fm->sockets[cnt]->dev);
231 }
232
233 spin_lock(&tifm_adapter_lock);
234 idr_remove(&tifm_adapter_idr, fm->id);
235 spin_unlock(&tifm_adapter_lock);
236 device_del(&fm->dev);
237}
238EXPORT_SYMBOL(tifm_remove_adapter);
239
240void tifm_free_adapter(struct tifm_adapter *fm)
241{
242 put_device(&fm->dev);
243}
244EXPORT_SYMBOL(tifm_free_adapter);
245
246void tifm_free_device(struct device *dev)
247{
248 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
249 kfree(sock);
250}
251EXPORT_SYMBOL(tifm_free_device);
252
253struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
254 unsigned char type)
255{
256 struct tifm_dev *sock = NULL;
257
258 if (!tifm_media_type_name(type, 0))
259 return sock;
260
261 sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
262 if (sock) {
263 spin_lock_init(&sock->lock);
264 sock->type = type;
265 sock->socket_id = id;
266 sock->card_event = tifm_dummy_event;
267 sock->data_event = tifm_dummy_event;
268
269 sock->dev.parent = fm->dev.parent;
270 sock->dev.bus = &tifm_bus_type;
271 sock->dev.dma_mask = fm->dev.parent->dma_mask;
272 sock->dev.release = tifm_free_device;
273
274 dev_set_name(&sock->dev, "tifm_%s%u:%u",
275 tifm_media_type_name(type, 2), fm->id, id);
276 printk(KERN_INFO DRIVER_NAME
277 ": %s card detected in socket %u:%u\n",
278 tifm_media_type_name(type, 0), fm->id, id);
279 }
280 return sock;
281}
282EXPORT_SYMBOL(tifm_alloc_device);
283
284void tifm_eject(struct tifm_dev *sock)
285{
286 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
287 fm->eject(fm, sock);
288}
289EXPORT_SYMBOL(tifm_eject);
290
291int tifm_has_ms_pif(struct tifm_dev *sock)
292{
293 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
294 return fm->has_ms_pif(fm, sock);
295}
296EXPORT_SYMBOL(tifm_has_ms_pif);
297
298int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
299 int direction)
300{
301 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
302}
303EXPORT_SYMBOL(tifm_map_sg);
304
305void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
306 int direction)
307{
308 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
309}
310EXPORT_SYMBOL(tifm_unmap_sg);
311
312void tifm_queue_work(struct work_struct *work)
313{
314 queue_work(workqueue, work);
315}
316EXPORT_SYMBOL(tifm_queue_work);
317
318int tifm_register_driver(struct tifm_driver *drv)
319{
320 drv->driver.bus = &tifm_bus_type;
321
322 return driver_register(&drv->driver);
323}
324EXPORT_SYMBOL(tifm_register_driver);
325
326void tifm_unregister_driver(struct tifm_driver *drv)
327{
328 driver_unregister(&drv->driver);
329}
330EXPORT_SYMBOL(tifm_unregister_driver);
331
332static int __init tifm_init(void)
333{
334 int rc;
335
336 workqueue = create_freezable_workqueue("tifm");
337 if (!workqueue)
338 return -ENOMEM;
339
340 rc = bus_register(&tifm_bus_type);
341
342 if (rc)
343 goto err_out_wq;
344
345 rc = class_register(&tifm_adapter_class);
346 if (!rc)
347 return 0;
348
349 bus_unregister(&tifm_bus_type);
350
351err_out_wq:
352 destroy_workqueue(workqueue);
353
354 return rc;
355}
356
357static void __exit tifm_exit(void)
358{
359 class_unregister(&tifm_adapter_class);
360 bus_unregister(&tifm_bus_type);
361 destroy_workqueue(workqueue);
362}
363
364subsys_initcall(tifm_init);
365module_exit(tifm_exit);
366
367MODULE_LICENSE("GPL");
368MODULE_AUTHOR("Alex Dubov");
369MODULE_DESCRIPTION("TI FlashMedia core driver");
370MODULE_LICENSE("GPL");
371MODULE_VERSION(DRIVER_VERSION);
372
