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8#include <linux/tifm.h>
9#include <linux/slab.h>
10#include <linux/init.h>
11#include <linux/idr.h>
12#include <linux/module.h>
13
14#define DRIVER_NAME "tifm_core"
15#define DRIVER_VERSION "0.8"
16
17static struct workqueue_struct *workqueue;
18static DEFINE_IDR(tifm_adapter_idr);
19static DEFINE_SPINLOCK(tifm_adapter_lock);
20
21static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
22{
23 const char *card_type_name[3][3] = {
24 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
25 { "XD", "MS", "SD"},
26 { "xd", "ms", "sd"}
27 };
28
29 if (nt > 2 || type < 1 || type > 3)
30 return NULL;
31 return card_type_name[nt][type - 1];
32}
33
34static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
35{
36 if (sock->type == id->type)
37 return 1;
38 return 0;
39}
40
41static int tifm_bus_match(struct device *dev, struct device_driver *drv)
42{
43 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
44 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
45 driver);
46 struct tifm_device_id *ids = fm_drv->id_table;
47
48 if (ids) {
49 while (ids->type) {
50 if (tifm_dev_match(sock, ids))
51 return 1;
52 ++ids;
53 }
54 }
55 return 0;
56}
57
58static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
59{
60 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
61
62 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
63 return -ENOMEM;
64
65 return 0;
66}
67
68static int tifm_device_probe(struct device *dev)
69{
70 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
71 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
72 driver);
73 int rc = -ENODEV;
74
75 get_device(dev);
76 if (dev->driver && drv->probe) {
77 rc = drv->probe(sock);
78 if (!rc)
79 return 0;
80 }
81 put_device(dev);
82 return rc;
83}
84
85static void tifm_dummy_event(struct tifm_dev *sock)
86{
87 return;
88}
89
90static int tifm_device_remove(struct device *dev)
91{
92 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
93 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
94 driver);
95
96 if (dev->driver && drv->remove) {
97 sock->card_event = tifm_dummy_event;
98 sock->data_event = tifm_dummy_event;
99 drv->remove(sock);
100 sock->dev.driver = NULL;
101 }
102
103 put_device(dev);
104 return 0;
105}
106
107#ifdef CONFIG_PM
108
109static int tifm_device_suspend(struct device *dev, pm_message_t state)
110{
111 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
112 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
113 driver);
114
115 if (dev->driver && drv->suspend)
116 return drv->suspend(sock, state);
117 return 0;
118}
119
120static int tifm_device_resume(struct device *dev)
121{
122 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
123 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
124 driver);
125
126 if (dev->driver && drv->resume)
127 return drv->resume(sock);
128 return 0;
129}
130
131#else
132
133#define tifm_device_suspend NULL
134#define tifm_device_resume NULL
135
136#endif
137
138static ssize_t type_show(struct device *dev, struct device_attribute *attr,
139 char *buf)
140{
141 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
142 return sprintf(buf, "%x", sock->type);
143}
144static DEVICE_ATTR_RO(type);
145
146static struct attribute *tifm_dev_attrs[] = {
147 &dev_attr_type.attr,
148 NULL,
149};
150ATTRIBUTE_GROUPS(tifm_dev);
151
152static struct bus_type tifm_bus_type = {
153 .name = "tifm",
154 .dev_groups = tifm_dev_groups,
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
163static 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
170static struct class tifm_adapter_class = {
171 .name = "tifm_adapter",
172 .dev_release = tifm_free
173};
174
175struct 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}
191EXPORT_SYMBOL(tifm_alloc_adapter);
192
193int tifm_add_adapter(struct tifm_adapter *fm)
194{
195 int rc;
196
197 idr_preload(GFP_KERNEL);
198 spin_lock(&tifm_adapter_lock);
199 rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
200 if (rc >= 0)
201 fm->id = rc;
202 spin_unlock(&tifm_adapter_lock);
203 idr_preload_end();
204 if (rc < 0)
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}
217EXPORT_SYMBOL(tifm_add_adapter);
218
219void 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}
234EXPORT_SYMBOL(tifm_remove_adapter);
235
236void tifm_free_adapter(struct tifm_adapter *fm)
237{
238 put_device(&fm->dev);
239}
240EXPORT_SYMBOL(tifm_free_adapter);
241
242void tifm_free_device(struct device *dev)
243{
244 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
245 kfree(sock);
246}
247EXPORT_SYMBOL(tifm_free_device);
248
249struct 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}
278EXPORT_SYMBOL(tifm_alloc_device);
279
280void tifm_eject(struct tifm_dev *sock)
281{
282 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
283 fm->eject(fm, sock);
284}
285EXPORT_SYMBOL(tifm_eject);
286
287int 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}
292EXPORT_SYMBOL(tifm_has_ms_pif);
293
294int 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}
299EXPORT_SYMBOL(tifm_map_sg);
300
301void 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}
306EXPORT_SYMBOL(tifm_unmap_sg);
307
308void tifm_queue_work(struct work_struct *work)
309{
310 queue_work(workqueue, work);
311}
312EXPORT_SYMBOL(tifm_queue_work);
313
314int tifm_register_driver(struct tifm_driver *drv)
315{
316 drv->driver.bus = &tifm_bus_type;
317
318 return driver_register(&drv->driver);
319}
320EXPORT_SYMBOL(tifm_register_driver);
321
322void tifm_unregister_driver(struct tifm_driver *drv)
323{
324 driver_unregister(&drv->driver);
325}
326EXPORT_SYMBOL(tifm_unregister_driver);
327
328static 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
347err_out_wq:
348 destroy_workqueue(workqueue);
349
350 return rc;
351}
352
353static void __exit tifm_exit(void)
354{
355 class_unregister(&tifm_adapter_class);
356 bus_unregister(&tifm_bus_type);
357 destroy_workqueue(workqueue);
358}
359
360subsys_initcall(tifm_init);
361module_exit(tifm_exit);
362
363MODULE_LICENSE("GPL");
364MODULE_AUTHOR("Alex Dubov");
365MODULE_DESCRIPTION("TI FlashMedia core driver");
366MODULE_LICENSE("GPL");
367MODULE_VERSION(DRIVER_VERSION);
368
