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Commit | Line | Data |
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701b57ee HV |
1 | /* |
2 | * | |
3 | * some helper function for simple DVB cards which simply DMA the | |
4 | * complete transport stream and let the computer sort everything else | |
5 | * (i.e. we are using the software demux, ...). Also uses the | |
6 | * video-buf to manage DMA buffers. | |
7 | * | |
8 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs] | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | #include <media/videobuf2-dvb.h> | |
22 | ||
23 | /* ------------------------------------------------------------------ */ | |
24 | ||
25 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); | |
26 | MODULE_LICENSE("GPL"); | |
27 | ||
28 | /* ------------------------------------------------------------------ */ | |
29 | ||
30 | static int dvb_fnc(struct vb2_buffer *vb, void *priv) | |
31 | { | |
32 | struct vb2_dvb *dvb = priv; | |
33 | ||
34 | dvb_dmx_swfilter(&dvb->demux, vb2_plane_vaddr(vb, 0), | |
35 | vb2_get_plane_payload(vb, 0)); | |
36 | return 0; | |
37 | } | |
38 | ||
39 | static int vb2_dvb_start_feed(struct dvb_demux_feed *feed) | |
40 | { | |
41 | struct dvb_demux *demux = feed->demux; | |
42 | struct vb2_dvb *dvb = demux->priv; | |
43 | int rc = 0; | |
44 | ||
45 | if (!demux->dmx.frontend) | |
46 | return -EINVAL; | |
47 | ||
48 | mutex_lock(&dvb->lock); | |
49 | dvb->nfeeds++; | |
50 | ||
51 | if (!dvb->dvbq.threadio) { | |
52 | rc = vb2_thread_start(&dvb->dvbq, dvb_fnc, dvb, dvb->name); | |
53 | if (rc) | |
54 | dvb->nfeeds--; | |
55 | } | |
56 | if (!rc) | |
57 | rc = dvb->nfeeds; | |
58 | mutex_unlock(&dvb->lock); | |
59 | return rc; | |
60 | } | |
61 | ||
62 | static int vb2_dvb_stop_feed(struct dvb_demux_feed *feed) | |
63 | { | |
64 | struct dvb_demux *demux = feed->demux; | |
65 | struct vb2_dvb *dvb = demux->priv; | |
66 | int err = 0; | |
67 | ||
68 | mutex_lock(&dvb->lock); | |
69 | dvb->nfeeds--; | |
70 | if (0 == dvb->nfeeds) | |
71 | err = vb2_thread_stop(&dvb->dvbq); | |
72 | mutex_unlock(&dvb->lock); | |
73 | return err; | |
74 | } | |
75 | ||
76 | static int vb2_dvb_register_adapter(struct vb2_dvb_frontends *fe, | |
77 | struct module *module, | |
78 | void *adapter_priv, | |
79 | struct device *device, | |
2773b0e9 | 80 | struct media_device *mdev, |
701b57ee HV |
81 | char *adapter_name, |
82 | short *adapter_nr, | |
83 | int mfe_shared) | |
84 | { | |
85 | int result; | |
86 | ||
87 | mutex_init(&fe->lock); | |
88 | ||
89 | /* register adapter */ | |
90 | result = dvb_register_adapter(&fe->adapter, adapter_name, module, | |
91 | device, adapter_nr); | |
92 | if (result < 0) { | |
93 | pr_warn("%s: dvb_register_adapter failed (errno = %d)\n", | |
94 | adapter_name, result); | |
95 | } | |
96 | fe->adapter.priv = adapter_priv; | |
97 | fe->adapter.mfe_shared = mfe_shared; | |
2773b0e9 MCC |
98 | #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
99 | if (mdev) | |
100 | fe->adapter.mdev = mdev; | |
101 | #endif | |
701b57ee HV |
102 | return result; |
103 | } | |
104 | ||
105 | static int vb2_dvb_register_frontend(struct dvb_adapter *adapter, | |
106 | struct vb2_dvb *dvb) | |
107 | { | |
108 | int result; | |
109 | ||
110 | /* register frontend */ | |
111 | result = dvb_register_frontend(adapter, dvb->frontend); | |
112 | if (result < 0) { | |
113 | pr_warn("%s: dvb_register_frontend failed (errno = %d)\n", | |
114 | dvb->name, result); | |
115 | goto fail_frontend; | |
116 | } | |
117 | ||
118 | /* register demux stuff */ | |
119 | dvb->demux.dmx.capabilities = | |
120 | DMX_TS_FILTERING | DMX_SECTION_FILTERING | | |
121 | DMX_MEMORY_BASED_FILTERING; | |
122 | dvb->demux.priv = dvb; | |
123 | dvb->demux.filternum = 256; | |
124 | dvb->demux.feednum = 256; | |
125 | dvb->demux.start_feed = vb2_dvb_start_feed; | |
126 | dvb->demux.stop_feed = vb2_dvb_stop_feed; | |
127 | result = dvb_dmx_init(&dvb->demux); | |
128 | if (result < 0) { | |
129 | pr_warn("%s: dvb_dmx_init failed (errno = %d)\n", | |
130 | dvb->name, result); | |
131 | goto fail_dmx; | |
132 | } | |
133 | ||
134 | dvb->dmxdev.filternum = 256; | |
135 | dvb->dmxdev.demux = &dvb->demux.dmx; | |
136 | dvb->dmxdev.capabilities = 0; | |
137 | result = dvb_dmxdev_init(&dvb->dmxdev, adapter); | |
138 | ||
139 | if (result < 0) { | |
140 | pr_warn("%s: dvb_dmxdev_init failed (errno = %d)\n", | |
141 | dvb->name, result); | |
142 | goto fail_dmxdev; | |
143 | } | |
144 | ||
145 | dvb->fe_hw.source = DMX_FRONTEND_0; | |
146 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
147 | if (result < 0) { | |
148 | pr_warn("%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n", | |
149 | dvb->name, result); | |
150 | goto fail_fe_hw; | |
151 | } | |
152 | ||
153 | dvb->fe_mem.source = DMX_MEMORY_FE; | |
154 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
155 | if (result < 0) { | |
156 | pr_warn("%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n", | |
157 | dvb->name, result); | |
158 | goto fail_fe_mem; | |
159 | } | |
160 | ||
161 | result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
162 | if (result < 0) { | |
163 | pr_warn("%s: connect_frontend failed (errno = %d)\n", | |
164 | dvb->name, result); | |
165 | goto fail_fe_conn; | |
166 | } | |
167 | ||
168 | /* register network adapter */ | |
169 | result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx); | |
170 | if (result < 0) { | |
171 | pr_warn("%s: dvb_net_init failed (errno = %d)\n", | |
172 | dvb->name, result); | |
173 | goto fail_fe_conn; | |
174 | } | |
175 | return 0; | |
176 | ||
177 | fail_fe_conn: | |
178 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
179 | fail_fe_mem: | |
180 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
181 | fail_fe_hw: | |
182 | dvb_dmxdev_release(&dvb->dmxdev); | |
183 | fail_dmxdev: | |
184 | dvb_dmx_release(&dvb->demux); | |
185 | fail_dmx: | |
186 | dvb_unregister_frontend(dvb->frontend); | |
187 | fail_frontend: | |
188 | dvb_frontend_detach(dvb->frontend); | |
189 | dvb->frontend = NULL; | |
190 | ||
191 | return result; | |
192 | } | |
193 | ||
194 | /* ------------------------------------------------------------------ */ | |
195 | /* Register a single adapter and one or more frontends */ | |
196 | int vb2_dvb_register_bus(struct vb2_dvb_frontends *f, | |
197 | struct module *module, | |
198 | void *adapter_priv, | |
199 | struct device *device, | |
2773b0e9 | 200 | struct media_device *mdev, |
701b57ee HV |
201 | short *adapter_nr, |
202 | int mfe_shared) | |
203 | { | |
204 | struct list_head *list, *q; | |
205 | struct vb2_dvb_frontend *fe; | |
206 | int res; | |
207 | ||
208 | fe = vb2_dvb_get_frontend(f, 1); | |
209 | if (!fe) { | |
210 | pr_warn("Unable to register the adapter which has no frontends\n"); | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
214 | /* Bring up the adapter */ | |
2773b0e9 | 215 | res = vb2_dvb_register_adapter(f, module, adapter_priv, device, mdev, |
701b57ee HV |
216 | fe->dvb.name, adapter_nr, mfe_shared); |
217 | if (res < 0) { | |
218 | pr_warn("vb2_dvb_register_adapter failed (errno = %d)\n", res); | |
219 | return res; | |
220 | } | |
221 | ||
222 | /* Attach all of the frontends to the adapter */ | |
223 | mutex_lock(&f->lock); | |
224 | list_for_each_safe(list, q, &f->felist) { | |
225 | fe = list_entry(list, struct vb2_dvb_frontend, felist); | |
226 | res = vb2_dvb_register_frontend(&f->adapter, &fe->dvb); | |
227 | if (res < 0) { | |
228 | pr_warn("%s: vb2_dvb_register_frontend failed (errno = %d)\n", | |
229 | fe->dvb.name, res); | |
230 | goto err; | |
231 | } | |
2773b0e9 MCC |
232 | res = dvb_create_media_graph(&f->adapter, false); |
233 | if (res < 0) | |
234 | goto err; | |
701b57ee | 235 | } |
2773b0e9 | 236 | |
701b57ee HV |
237 | mutex_unlock(&f->lock); |
238 | return 0; | |
239 | ||
240 | err: | |
241 | mutex_unlock(&f->lock); | |
242 | vb2_dvb_unregister_bus(f); | |
243 | return res; | |
244 | } | |
245 | EXPORT_SYMBOL(vb2_dvb_register_bus); | |
246 | ||
247 | void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f) | |
248 | { | |
249 | vb2_dvb_dealloc_frontends(f); | |
250 | ||
251 | dvb_unregister_adapter(&f->adapter); | |
252 | } | |
253 | EXPORT_SYMBOL(vb2_dvb_unregister_bus); | |
254 | ||
255 | struct vb2_dvb_frontend *vb2_dvb_get_frontend( | |
256 | struct vb2_dvb_frontends *f, int id) | |
257 | { | |
258 | struct list_head *list, *q; | |
259 | struct vb2_dvb_frontend *fe, *ret = NULL; | |
260 | ||
261 | mutex_lock(&f->lock); | |
262 | ||
263 | list_for_each_safe(list, q, &f->felist) { | |
264 | fe = list_entry(list, struct vb2_dvb_frontend, felist); | |
265 | if (fe->id == id) { | |
266 | ret = fe; | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
271 | mutex_unlock(&f->lock); | |
272 | ||
273 | return ret; | |
274 | } | |
275 | EXPORT_SYMBOL(vb2_dvb_get_frontend); | |
276 | ||
277 | int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f, | |
278 | struct dvb_frontend *p) | |
279 | { | |
280 | struct list_head *list, *q; | |
281 | struct vb2_dvb_frontend *fe = NULL; | |
282 | int ret = 0; | |
283 | ||
284 | mutex_lock(&f->lock); | |
285 | ||
286 | list_for_each_safe(list, q, &f->felist) { | |
287 | fe = list_entry(list, struct vb2_dvb_frontend, felist); | |
288 | if (fe->dvb.frontend == p) { | |
289 | ret = fe->id; | |
290 | break; | |
291 | } | |
292 | } | |
293 | ||
294 | mutex_unlock(&f->lock); | |
295 | ||
296 | return ret; | |
297 | } | |
298 | EXPORT_SYMBOL(vb2_dvb_find_frontend); | |
299 | ||
300 | struct vb2_dvb_frontend *vb2_dvb_alloc_frontend( | |
301 | struct vb2_dvb_frontends *f, int id) | |
302 | { | |
303 | struct vb2_dvb_frontend *fe; | |
304 | ||
305 | fe = kzalloc(sizeof(struct vb2_dvb_frontend), GFP_KERNEL); | |
306 | if (fe == NULL) | |
307 | return NULL; | |
308 | ||
309 | fe->id = id; | |
310 | mutex_init(&fe->dvb.lock); | |
311 | ||
312 | mutex_lock(&f->lock); | |
313 | list_add_tail(&fe->felist, &f->felist); | |
314 | mutex_unlock(&f->lock); | |
315 | return fe; | |
316 | } | |
317 | EXPORT_SYMBOL(vb2_dvb_alloc_frontend); | |
318 | ||
319 | void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f) | |
320 | { | |
321 | struct list_head *list, *q; | |
322 | struct vb2_dvb_frontend *fe; | |
323 | ||
324 | mutex_lock(&f->lock); | |
325 | list_for_each_safe(list, q, &f->felist) { | |
326 | fe = list_entry(list, struct vb2_dvb_frontend, felist); | |
327 | if (fe->dvb.net.dvbdev) { | |
328 | dvb_net_release(&fe->dvb.net); | |
329 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
330 | &fe->dvb.fe_mem); | |
331 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
332 | &fe->dvb.fe_hw); | |
333 | dvb_dmxdev_release(&fe->dvb.dmxdev); | |
334 | dvb_dmx_release(&fe->dvb.demux); | |
335 | dvb_unregister_frontend(fe->dvb.frontend); | |
336 | } | |
337 | if (fe->dvb.frontend) | |
338 | /* always allocated, may have been reset */ | |
339 | dvb_frontend_detach(fe->dvb.frontend); | |
340 | list_del(list); /* remove list entry */ | |
341 | kfree(fe); /* free frontend allocation */ | |
342 | } | |
343 | mutex_unlock(&f->lock); | |
344 | } | |
345 | EXPORT_SYMBOL(vb2_dvb_dealloc_frontends); |