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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
25MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
26MODULE_LICENSE("GPL");
27
28
29
30static 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
39static 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
62static 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
76static int vb2_dvb_register_adapter(struct vb2_dvb_frontends *fe,
77 struct module *module,
78 void *adapter_priv,
79 struct device *device,
80 struct media_device *mdev,
81 char *adapter_name,
82 short *adapter_nr,
83 int mfe_shared)
84{
85 int result;
86
87 mutex_init(&fe->lock);
88
89
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;
98#ifdef CONFIG_MEDIA_CONTROLLER_DVB
99 if (mdev)
100 fe->adapter.mdev = mdev;
101#endif
102 return result;
103}
104
105static int vb2_dvb_register_frontend(struct dvb_adapter *adapter,
106 struct vb2_dvb *dvb)
107{
108 int result;
109
110
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
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
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
177fail_fe_conn:
178 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
179fail_fe_mem:
180 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
181fail_fe_hw:
182 dvb_dmxdev_release(&dvb->dmxdev);
183fail_dmxdev:
184 dvb_dmx_release(&dvb->demux);
185fail_dmx:
186 dvb_unregister_frontend(dvb->frontend);
187fail_frontend:
188 dvb_frontend_detach(dvb->frontend);
189 dvb->frontend = NULL;
190
191 return result;
192}
193
194
195
196int vb2_dvb_register_bus(struct vb2_dvb_frontends *f,
197 struct module *module,
198 void *adapter_priv,
199 struct device *device,
200 struct media_device *mdev,
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
215 res = vb2_dvb_register_adapter(f, module, adapter_priv, device, mdev,
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
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 }
232 res = dvb_create_media_graph(&f->adapter, false);
233 if (res < 0)
234 goto err;
235 }
236
237 mutex_unlock(&f->lock);
238 return 0;
239
240err:
241 mutex_unlock(&f->lock);
242 vb2_dvb_unregister_bus(f);
243 return res;
244}
245EXPORT_SYMBOL(vb2_dvb_register_bus);
246
247void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f)
248{
249 vb2_dvb_dealloc_frontends(f);
250
251 dvb_unregister_adapter(&f->adapter);
252}
253EXPORT_SYMBOL(vb2_dvb_unregister_bus);
254
255struct 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}
275EXPORT_SYMBOL(vb2_dvb_get_frontend);
276
277int 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}
298EXPORT_SYMBOL(vb2_dvb_find_frontend);
299
300struct 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}
317EXPORT_SYMBOL(vb2_dvb_alloc_frontend);
318
319void 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
339 dvb_frontend_detach(fe->dvb.frontend);
340 list_del(list);
341 kfree(fe);
342 }
343 mutex_unlock(&f->lock);
344}
345EXPORT_SYMBOL(vb2_dvb_dealloc_frontends);
346
