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.
8 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
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.
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/device.h>
19 #include <linux/slab.h>
21 #include <media/videobuf2-dvb.h>
23 /* ------------------------------------------------------------------ */
25 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
26 MODULE_LICENSE("GPL");
28 /* ------------------------------------------------------------------ */
30 static int dvb_fnc(struct vb2_buffer *vb, void *priv)
32 struct vb2_dvb *dvb = priv;
34 dvb_dmx_swfilter(&dvb->demux, vb2_plane_vaddr(vb, 0),
35 vb2_get_plane_payload(vb, 0));
39 static int vb2_dvb_start_feed(struct dvb_demux_feed *feed)
41 struct dvb_demux *demux = feed->demux;
42 struct vb2_dvb *dvb = demux->priv;
45 if (!demux->dmx.frontend)
48 mutex_lock(&dvb->lock);
51 if (!dvb->dvbq.threadio) {
52 rc = vb2_thread_start(&dvb->dvbq, dvb_fnc, dvb, dvb->name);
58 mutex_unlock(&dvb->lock);
62 static int vb2_dvb_stop_feed(struct dvb_demux_feed *feed)
64 struct dvb_demux *demux = feed->demux;
65 struct vb2_dvb *dvb = demux->priv;
68 mutex_lock(&dvb->lock);
71 err = vb2_thread_stop(&dvb->dvbq);
72 mutex_unlock(&dvb->lock);
76 static int vb2_dvb_register_adapter(struct vb2_dvb_frontends *fe,
77 struct module *module,
79 struct device *device,
80 struct media_device *mdev,
87 mutex_init(&fe->lock);
89 /* register adapter */
90 result = dvb_register_adapter(&fe->adapter, adapter_name, module,
93 pr_warn("%s: dvb_register_adapter failed (errno = %d)\n",
94 adapter_name, result);
96 fe->adapter.priv = adapter_priv;
97 fe->adapter.mfe_shared = mfe_shared;
98 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
100 fe->adapter.mdev = mdev;
105 static int vb2_dvb_register_frontend(struct dvb_adapter *adapter,
110 /* register frontend */
111 result = dvb_register_frontend(adapter, dvb->frontend);
113 pr_warn("%s: dvb_register_frontend failed (errno = %d)\n",
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);
129 pr_warn("%s: dvb_dmx_init failed (errno = %d)\n",
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);
140 pr_warn("%s: dvb_dmxdev_init failed (errno = %d)\n",
145 dvb->fe_hw.source = DMX_FRONTEND_0;
146 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
148 pr_warn("%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
153 dvb->fe_mem.source = DMX_MEMORY_FE;
154 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
156 pr_warn("%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
161 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
163 pr_warn("%s: connect_frontend failed (errno = %d)\n",
168 /* register network adapter */
169 result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
171 pr_warn("%s: dvb_net_init failed (errno = %d)\n",
178 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
180 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
182 dvb_dmxdev_release(&dvb->dmxdev);
184 dvb_dmx_release(&dvb->demux);
186 dvb_unregister_frontend(dvb->frontend);
188 dvb_frontend_detach(dvb->frontend);
189 dvb->frontend = NULL;
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,
199 struct device *device,
200 struct media_device *mdev,
204 struct list_head *list, *q;
205 struct vb2_dvb_frontend *fe;
208 fe = vb2_dvb_get_frontend(f, 1);
210 pr_warn("Unable to register the adapter which has no frontends\n");
214 /* Bring up the adapter */
215 res = vb2_dvb_register_adapter(f, module, adapter_priv, device, mdev,
216 fe->dvb.name, adapter_nr, mfe_shared);
218 pr_warn("vb2_dvb_register_adapter failed (errno = %d)\n", res);
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);
228 pr_warn("%s: vb2_dvb_register_frontend failed (errno = %d)\n",
232 res = dvb_create_media_graph(&f->adapter, false);
237 mutex_unlock(&f->lock);
241 mutex_unlock(&f->lock);
242 vb2_dvb_unregister_bus(f);
245 EXPORT_SYMBOL(vb2_dvb_register_bus);
247 void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f)
249 vb2_dvb_dealloc_frontends(f);
251 dvb_unregister_adapter(&f->adapter);
253 EXPORT_SYMBOL(vb2_dvb_unregister_bus);
255 struct vb2_dvb_frontend *vb2_dvb_get_frontend(
256 struct vb2_dvb_frontends *f, int id)
258 struct list_head *list, *q;
259 struct vb2_dvb_frontend *fe, *ret = NULL;
261 mutex_lock(&f->lock);
263 list_for_each_safe(list, q, &f->felist) {
264 fe = list_entry(list, struct vb2_dvb_frontend, felist);
271 mutex_unlock(&f->lock);
275 EXPORT_SYMBOL(vb2_dvb_get_frontend);
277 int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f,
278 struct dvb_frontend *p)
280 struct list_head *list, *q;
281 struct vb2_dvb_frontend *fe = NULL;
284 mutex_lock(&f->lock);
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) {
294 mutex_unlock(&f->lock);
298 EXPORT_SYMBOL(vb2_dvb_find_frontend);
300 struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(
301 struct vb2_dvb_frontends *f, int id)
303 struct vb2_dvb_frontend *fe;
305 fe = kzalloc(sizeof(struct vb2_dvb_frontend), GFP_KERNEL);
310 mutex_init(&fe->dvb.lock);
312 mutex_lock(&f->lock);
313 list_add_tail(&fe->felist, &f->felist);
314 mutex_unlock(&f->lock);
317 EXPORT_SYMBOL(vb2_dvb_alloc_frontend);
319 void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f)
321 struct list_head *list, *q;
322 struct vb2_dvb_frontend *fe;
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,
331 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
333 dvb_dmxdev_release(&fe->dvb.dmxdev);
334 dvb_dmx_release(&fe->dvb.demux);
335 dvb_unregister_frontend(fe->dvb.frontend);
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 */
343 mutex_unlock(&f->lock);
345 EXPORT_SYMBOL(vb2_dvb_dealloc_frontends);