Commit | Line | Data |
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4020f2d7 AD |
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" | |
4552f0cb | 17 | #define DRIVER_VERSION "0.8" |
4020f2d7 | 18 | |
3540af8f | 19 | static struct workqueue_struct *workqueue; |
4020f2d7 AD |
20 | static DEFINE_IDR(tifm_adapter_idr); |
21 | static DEFINE_SPINLOCK(tifm_adapter_lock); | |
22 | ||
e23f2b8a | 23 | static const char *tifm_media_type_name(unsigned char type, unsigned char nt) |
4020f2d7 | 24 | { |
e23f2b8a AD |
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]; | |
4020f2d7 AD |
34 | } |
35 | ||
e23f2b8a | 36 | static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id) |
4020f2d7 | 37 | { |
e23f2b8a | 38 | if (sock->type == id->type) |
4020f2d7 | 39 | return 1; |
e23f2b8a AD |
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; | |
4020f2d7 AD |
58 | } |
59 | ||
60 | static int tifm_uevent(struct device *dev, char **envp, int num_envp, | |
61 | char *buffer, int buffer_size) | |
62 | { | |
e23f2b8a | 63 | struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); |
4020f2d7 AD |
64 | int i = 0; |
65 | int length = 0; | |
4020f2d7 | 66 | |
4020f2d7 | 67 | if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length, |
e23f2b8a AD |
68 | "TIFM_CARD_TYPE=%s", |
69 | tifm_media_type_name(sock->type, 1))) | |
4020f2d7 AD |
70 | return -ENOMEM; |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
8dc4a61e AD |
75 | static int tifm_device_probe(struct device *dev) |
76 | { | |
77 | struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); | |
78 | struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, | |
79 | driver); | |
80 | int rc = -ENODEV; | |
81 | ||
82 | get_device(dev); | |
83 | if (dev->driver && drv->probe) { | |
84 | rc = drv->probe(sock); | |
85 | if (!rc) | |
86 | return 0; | |
87 | } | |
88 | put_device(dev); | |
89 | return rc; | |
90 | } | |
91 | ||
92 | static void tifm_dummy_event(struct tifm_dev *sock) | |
93 | { | |
94 | return; | |
95 | } | |
96 | ||
97 | static int tifm_device_remove(struct device *dev) | |
98 | { | |
99 | struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev); | |
100 | struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, | |
101 | driver); | |
102 | ||
103 | if (dev->driver && drv->remove) { | |
104 | sock->card_event = tifm_dummy_event; | |
105 | sock->data_event = tifm_dummy_event; | |
106 | drv->remove(sock); | |
107 | sock->dev.driver = NULL; | |
108 | } | |
109 | ||
110 | put_device(dev); | |
111 | return 0; | |
112 | } | |
113 | ||
41d78f74 AD |
114 | #ifdef CONFIG_PM |
115 | ||
116 | static int tifm_device_suspend(struct device *dev, pm_message_t state) | |
117 | { | |
118 | struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); | |
8dc4a61e AD |
119 | struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, |
120 | driver); | |
41d78f74 | 121 | |
8dc4a61e | 122 | if (dev->driver && drv->suspend) |
41d78f74 AD |
123 | return drv->suspend(fm_dev, state); |
124 | return 0; | |
125 | } | |
126 | ||
127 | static int tifm_device_resume(struct device *dev) | |
128 | { | |
129 | struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); | |
8dc4a61e AD |
130 | struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver, |
131 | driver); | |
41d78f74 | 132 | |
8dc4a61e | 133 | if (dev->driver && drv->resume) |
41d78f74 AD |
134 | return drv->resume(fm_dev); |
135 | return 0; | |
136 | } | |
137 | ||
138 | #else | |
139 | ||
140 | #define tifm_device_suspend NULL | |
141 | #define tifm_device_resume NULL | |
142 | ||
143 | #endif /* CONFIG_PM */ | |
144 | ||
4020f2d7 AD |
145 | static struct bus_type tifm_bus_type = { |
146 | .name = "tifm", | |
e23f2b8a | 147 | .match = tifm_bus_match, |
4020f2d7 | 148 | .uevent = tifm_uevent, |
8dc4a61e AD |
149 | .probe = tifm_device_probe, |
150 | .remove = tifm_device_remove, | |
41d78f74 AD |
151 | .suspend = tifm_device_suspend, |
152 | .resume = tifm_device_resume | |
4020f2d7 AD |
153 | }; |
154 | ||
155 | static void tifm_free(struct class_device *cdev) | |
156 | { | |
157 | struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev); | |
158 | ||
4020f2d7 AD |
159 | kfree(fm); |
160 | } | |
161 | ||
162 | static struct class tifm_adapter_class = { | |
163 | .name = "tifm_adapter", | |
164 | .release = tifm_free | |
165 | }; | |
166 | ||
6113ed73 AD |
167 | struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets, |
168 | struct device *dev) | |
4020f2d7 AD |
169 | { |
170 | struct tifm_adapter *fm; | |
171 | ||
6113ed73 AD |
172 | fm = kzalloc(sizeof(struct tifm_adapter) |
173 | + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL); | |
4020f2d7 AD |
174 | if (fm) { |
175 | fm->cdev.class = &tifm_adapter_class; | |
6113ed73 | 176 | fm->cdev.dev = dev; |
4020f2d7 | 177 | class_device_initialize(&fm->cdev); |
6113ed73 AD |
178 | spin_lock_init(&fm->lock); |
179 | fm->num_sockets = num_sockets; | |
4020f2d7 AD |
180 | } |
181 | return fm; | |
182 | } | |
183 | EXPORT_SYMBOL(tifm_alloc_adapter); | |
184 | ||
3540af8f | 185 | int tifm_add_adapter(struct tifm_adapter *fm) |
4020f2d7 AD |
186 | { |
187 | int rc; | |
188 | ||
189 | if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL)) | |
190 | return -ENOMEM; | |
191 | ||
192 | spin_lock(&tifm_adapter_lock); | |
193 | rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id); | |
194 | spin_unlock(&tifm_adapter_lock); | |
6113ed73 AD |
195 | if (rc) |
196 | return rc; | |
197 | ||
198 | snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id); | |
199 | rc = class_device_add(&fm->cdev); | |
200 | if (rc) { | |
201 | spin_lock(&tifm_adapter_lock); | |
202 | idr_remove(&tifm_adapter_idr, fm->id); | |
203 | spin_unlock(&tifm_adapter_lock); | |
4020f2d7 | 204 | } |
6113ed73 | 205 | |
4020f2d7 AD |
206 | return rc; |
207 | } | |
208 | EXPORT_SYMBOL(tifm_add_adapter); | |
209 | ||
210 | void tifm_remove_adapter(struct tifm_adapter *fm) | |
211 | { | |
6113ed73 AD |
212 | unsigned int cnt; |
213 | ||
3540af8f | 214 | flush_workqueue(workqueue); |
6113ed73 AD |
215 | for (cnt = 0; cnt < fm->num_sockets; ++cnt) { |
216 | if (fm->sockets[cnt]) | |
217 | device_unregister(&fm->sockets[cnt]->dev); | |
218 | } | |
4020f2d7 AD |
219 | |
220 | spin_lock(&tifm_adapter_lock); | |
221 | idr_remove(&tifm_adapter_idr, fm->id); | |
222 | spin_unlock(&tifm_adapter_lock); | |
6113ed73 | 223 | class_device_del(&fm->cdev); |
4020f2d7 AD |
224 | } |
225 | EXPORT_SYMBOL(tifm_remove_adapter); | |
226 | ||
6113ed73 AD |
227 | void tifm_free_adapter(struct tifm_adapter *fm) |
228 | { | |
229 | class_device_put(&fm->cdev); | |
230 | } | |
231 | EXPORT_SYMBOL(tifm_free_adapter); | |
232 | ||
4020f2d7 AD |
233 | void tifm_free_device(struct device *dev) |
234 | { | |
235 | struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev); | |
4020f2d7 AD |
236 | kfree(fm_dev); |
237 | } | |
238 | EXPORT_SYMBOL(tifm_free_device); | |
239 | ||
8e02f858 | 240 | struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm) |
4020f2d7 AD |
241 | { |
242 | struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL); | |
243 | ||
244 | if (dev) { | |
245 | spin_lock_init(&dev->lock); | |
8e02f858 | 246 | |
6113ed73 | 247 | dev->dev.parent = fm->cdev.dev; |
4020f2d7 AD |
248 | dev->dev.bus = &tifm_bus_type; |
249 | dev->dev.release = tifm_free_device; | |
4552f0cb AD |
250 | dev->card_event = tifm_dummy_event; |
251 | dev->data_event = tifm_dummy_event; | |
4020f2d7 AD |
252 | } |
253 | return dev; | |
254 | } | |
255 | EXPORT_SYMBOL(tifm_alloc_device); | |
256 | ||
257 | void tifm_eject(struct tifm_dev *sock) | |
258 | { | |
259 | struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent); | |
260 | fm->eject(fm, sock); | |
261 | } | |
262 | EXPORT_SYMBOL(tifm_eject); | |
263 | ||
264 | int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, | |
265 | int direction) | |
266 | { | |
267 | return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); | |
268 | } | |
269 | EXPORT_SYMBOL(tifm_map_sg); | |
270 | ||
271 | void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents, | |
272 | int direction) | |
273 | { | |
274 | pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction); | |
275 | } | |
276 | EXPORT_SYMBOL(tifm_unmap_sg); | |
277 | ||
3540af8f AD |
278 | void tifm_queue_work(struct work_struct *work) |
279 | { | |
280 | queue_work(workqueue, work); | |
281 | } | |
282 | EXPORT_SYMBOL(tifm_queue_work); | |
283 | ||
4020f2d7 AD |
284 | int tifm_register_driver(struct tifm_driver *drv) |
285 | { | |
286 | drv->driver.bus = &tifm_bus_type; | |
4020f2d7 AD |
287 | |
288 | return driver_register(&drv->driver); | |
289 | } | |
290 | EXPORT_SYMBOL(tifm_register_driver); | |
291 | ||
292 | void tifm_unregister_driver(struct tifm_driver *drv) | |
293 | { | |
294 | driver_unregister(&drv->driver); | |
295 | } | |
296 | EXPORT_SYMBOL(tifm_unregister_driver); | |
297 | ||
298 | static int __init tifm_init(void) | |
299 | { | |
3540af8f | 300 | int rc; |
4020f2d7 | 301 | |
3540af8f AD |
302 | workqueue = create_freezeable_workqueue("tifm"); |
303 | if (!workqueue) | |
304 | return -ENOMEM; | |
305 | ||
306 | rc = bus_register(&tifm_bus_type); | |
307 | ||
308 | if (rc) | |
309 | goto err_out_wq; | |
310 | ||
311 | rc = class_register(&tifm_adapter_class); | |
312 | if (!rc) | |
313 | return 0; | |
314 | ||
315 | bus_unregister(&tifm_bus_type); | |
316 | ||
317 | err_out_wq: | |
318 | destroy_workqueue(workqueue); | |
4020f2d7 AD |
319 | |
320 | return rc; | |
321 | } | |
322 | ||
323 | static void __exit tifm_exit(void) | |
324 | { | |
325 | class_unregister(&tifm_adapter_class); | |
326 | bus_unregister(&tifm_bus_type); | |
3540af8f | 327 | destroy_workqueue(workqueue); |
4020f2d7 AD |
328 | } |
329 | ||
330 | subsys_initcall(tifm_init); | |
331 | module_exit(tifm_exit); | |
332 | ||
333 | MODULE_LICENSE("GPL"); | |
334 | MODULE_AUTHOR("Alex Dubov"); | |
335 | MODULE_DESCRIPTION("TI FlashMedia core driver"); | |
336 | MODULE_LICENSE("GPL"); | |
337 | MODULE_VERSION(DRIVER_VERSION); |