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,
86 mutex_init(&fe->lock);
88 /* register adapter */
89 result = dvb_register_adapter(&fe->adapter, adapter_name, module,
92 pr_warn("%s: dvb_register_adapter failed (errno = %d)\n",
93 adapter_name, result);
95 fe->adapter.priv = adapter_priv;
96 fe->adapter.mfe_shared = mfe_shared;
101 static int vb2_dvb_register_frontend(struct dvb_adapter *adapter,
106 /* register frontend */
107 result = dvb_register_frontend(adapter, dvb->frontend);
109 pr_warn("%s: dvb_register_frontend failed (errno = %d)\n",
114 /* register demux stuff */
115 dvb->demux.dmx.capabilities =
116 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
117 DMX_MEMORY_BASED_FILTERING;
118 dvb->demux.priv = dvb;
119 dvb->demux.filternum = 256;
120 dvb->demux.feednum = 256;
121 dvb->demux.start_feed = vb2_dvb_start_feed;
122 dvb->demux.stop_feed = vb2_dvb_stop_feed;
123 result = dvb_dmx_init(&dvb->demux);
125 pr_warn("%s: dvb_dmx_init failed (errno = %d)\n",
130 dvb->dmxdev.filternum = 256;
131 dvb->dmxdev.demux = &dvb->demux.dmx;
132 dvb->dmxdev.capabilities = 0;
133 result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
136 pr_warn("%s: dvb_dmxdev_init failed (errno = %d)\n",
141 dvb->fe_hw.source = DMX_FRONTEND_0;
142 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
144 pr_warn("%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
149 dvb->fe_mem.source = DMX_MEMORY_FE;
150 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
152 pr_warn("%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
157 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
159 pr_warn("%s: connect_frontend failed (errno = %d)\n",
164 /* register network adapter */
165 result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
167 pr_warn("%s: dvb_net_init failed (errno = %d)\n",
174 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
176 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
178 dvb_dmxdev_release(&dvb->dmxdev);
180 dvb_dmx_release(&dvb->demux);
182 dvb_unregister_frontend(dvb->frontend);
184 dvb_frontend_detach(dvb->frontend);
185 dvb->frontend = NULL;
190 /* ------------------------------------------------------------------ */
191 /* Register a single adapter and one or more frontends */
192 int vb2_dvb_register_bus(struct vb2_dvb_frontends *f,
193 struct module *module,
195 struct device *device,
199 struct list_head *list, *q;
200 struct vb2_dvb_frontend *fe;
203 fe = vb2_dvb_get_frontend(f, 1);
205 pr_warn("Unable to register the adapter which has no frontends\n");
209 /* Bring up the adapter */
210 res = vb2_dvb_register_adapter(f, module, adapter_priv, device,
211 fe->dvb.name, adapter_nr, mfe_shared);
213 pr_warn("vb2_dvb_register_adapter failed (errno = %d)\n", res);
217 /* Attach all of the frontends to the adapter */
218 mutex_lock(&f->lock);
219 list_for_each_safe(list, q, &f->felist) {
220 fe = list_entry(list, struct vb2_dvb_frontend, felist);
221 res = vb2_dvb_register_frontend(&f->adapter, &fe->dvb);
223 pr_warn("%s: vb2_dvb_register_frontend failed (errno = %d)\n",
228 mutex_unlock(&f->lock);
232 mutex_unlock(&f->lock);
233 vb2_dvb_unregister_bus(f);
236 EXPORT_SYMBOL(vb2_dvb_register_bus);
238 void vb2_dvb_unregister_bus(struct vb2_dvb_frontends *f)
240 vb2_dvb_dealloc_frontends(f);
242 dvb_unregister_adapter(&f->adapter);
244 EXPORT_SYMBOL(vb2_dvb_unregister_bus);
246 struct vb2_dvb_frontend *vb2_dvb_get_frontend(
247 struct vb2_dvb_frontends *f, int id)
249 struct list_head *list, *q;
250 struct vb2_dvb_frontend *fe, *ret = NULL;
252 mutex_lock(&f->lock);
254 list_for_each_safe(list, q, &f->felist) {
255 fe = list_entry(list, struct vb2_dvb_frontend, felist);
262 mutex_unlock(&f->lock);
266 EXPORT_SYMBOL(vb2_dvb_get_frontend);
268 int vb2_dvb_find_frontend(struct vb2_dvb_frontends *f,
269 struct dvb_frontend *p)
271 struct list_head *list, *q;
272 struct vb2_dvb_frontend *fe = NULL;
275 mutex_lock(&f->lock);
277 list_for_each_safe(list, q, &f->felist) {
278 fe = list_entry(list, struct vb2_dvb_frontend, felist);
279 if (fe->dvb.frontend == p) {
285 mutex_unlock(&f->lock);
289 EXPORT_SYMBOL(vb2_dvb_find_frontend);
291 struct vb2_dvb_frontend *vb2_dvb_alloc_frontend(
292 struct vb2_dvb_frontends *f, int id)
294 struct vb2_dvb_frontend *fe;
296 fe = kzalloc(sizeof(struct vb2_dvb_frontend), GFP_KERNEL);
301 mutex_init(&fe->dvb.lock);
303 mutex_lock(&f->lock);
304 list_add_tail(&fe->felist, &f->felist);
305 mutex_unlock(&f->lock);
308 EXPORT_SYMBOL(vb2_dvb_alloc_frontend);
310 void vb2_dvb_dealloc_frontends(struct vb2_dvb_frontends *f)
312 struct list_head *list, *q;
313 struct vb2_dvb_frontend *fe;
315 mutex_lock(&f->lock);
316 list_for_each_safe(list, q, &f->felist) {
317 fe = list_entry(list, struct vb2_dvb_frontend, felist);
318 if (fe->dvb.net.dvbdev) {
319 dvb_net_release(&fe->dvb.net);
320 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
322 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
324 dvb_dmxdev_release(&fe->dvb.dmxdev);
325 dvb_dmx_release(&fe->dvb.demux);
326 dvb_unregister_frontend(fe->dvb.frontend);
328 if (fe->dvb.frontend)
329 /* always allocated, may have been reset */
330 dvb_frontend_detach(fe->dvb.frontend);
331 list_del(list); /* remove list entry */
332 kfree(fe); /* free frontend allocation */
334 mutex_unlock(&f->lock);
336 EXPORT_SYMBOL(vb2_dvb_dealloc_frontends);