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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
19static struct workqueue_struct *workqueue;
20static DEFINE_IDR(tifm_adapter_idr);
21static DEFINE_SPINLOCK(tifm_adapter_lock);
22
23static 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
36static 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
43static 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
60static 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
70static 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
87static void tifm_dummy_event(struct tifm_dev *sock)
88{
89 return;
90}
91
92static 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
111static 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
122static 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
139
140static 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
147static struct device_attribute tifm_dev_attrs[] = {
148 __ATTR(type, S_IRUGO, type_show, NULL),
149 __ATTR_NULL
150};
151
152static 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
163static void tifm_free(struct class_device *cdev)
164{
165 struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev);
166
167 kfree(fm);
168}
169
170static struct class tifm_adapter_class = {
171 .name = "tifm_adapter",
172 .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->cdev.class = &tifm_adapter_class;
184 fm->cdev.dev = dev;
185 class_device_initialize(&fm->cdev);
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 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->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
207 rc = class_device_add(&fm->cdev);
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}
216EXPORT_SYMBOL(tifm_add_adapter);
217
218void 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 class_device_del(&fm->cdev);
232}
233EXPORT_SYMBOL(tifm_remove_adapter);
234
235void tifm_free_adapter(struct tifm_adapter *fm)
236{
237 class_device_put(&fm->cdev);
238}
239EXPORT_SYMBOL(tifm_free_adapter);
240
241void tifm_free_device(struct device *dev)
242{
243 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
244 kfree(sock);
245}
246EXPORT_SYMBOL(tifm_free_device);
247
248struct 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->cdev.dev;
265 sock->dev.bus = &tifm_bus_type;
266 sock->dev.dma_mask = fm->cdev.dev->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}
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_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
288 int direction)
289{
290 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
291}
292EXPORT_SYMBOL(tifm_map_sg);
293
294void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
295 int direction)
296{
297 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
298}
299EXPORT_SYMBOL(tifm_unmap_sg);
300
301void tifm_queue_work(struct work_struct *work)
302{
303 queue_work(workqueue, work);
304}
305EXPORT_SYMBOL(tifm_queue_work);
306
307int tifm_register_driver(struct tifm_driver *drv)
308{
309 drv->driver.bus = &tifm_bus_type;
310
311 return driver_register(&drv->driver);
312}
313EXPORT_SYMBOL(tifm_register_driver);
314
315void tifm_unregister_driver(struct tifm_driver *drv)
316{
317 driver_unregister(&drv->driver);
318}
319EXPORT_SYMBOL(tifm_unregister_driver);
320
321static int __init tifm_init(void)
322{
323 int rc;
324
325 workqueue = create_freezeable_workqueue("tifm");
326 if (!workqueue)
327 return -ENOMEM;
328
329 rc = bus_register(&tifm_bus_type);
330
331 if (rc)
332 goto err_out_wq;
333
334 rc = class_register(&tifm_adapter_class);
335 if (!rc)
336 return 0;
337
338 bus_unregister(&tifm_bus_type);
339
340err_out_wq:
341 destroy_workqueue(workqueue);
342
343 return rc;
344}
345
346static void __exit tifm_exit(void)
347{
348 class_unregister(&tifm_adapter_class);
349 bus_unregister(&tifm_bus_type);
350 destroy_workqueue(workqueue);
351}
352
353subsys_initcall(tifm_init);
354module_exit(tifm_exit);
355
356MODULE_LICENSE("GPL");
357MODULE_AUTHOR("Alex Dubov");
358MODULE_DESCRIPTION("TI FlashMedia core driver");
359MODULE_LICENSE("GPL");
360MODULE_VERSION(DRIVER_VERSION);
361
