1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
4 *
5 * Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
6 */
7
8 #include <linux/kthread.h>
9 #include <linux/freezer.h>
10 #include <linux/slab.h>
11 #include <linux/mm.h>
12 #include <media/dvbdev.h>
13 #include "pvrusb2-debug.h"
14 #include "pvrusb2-hdw-internal.h"
15 #include "pvrusb2-hdw.h"
16 #include "pvrusb2-io.h"
17 #include "pvrusb2-dvb.h"
18
19 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
20
pvr2_dvb_feed_func(struct pvr2_dvb_adapter * adap)21 static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
22 {
23 int ret;
24 unsigned int count;
25 struct pvr2_buffer *bp;
26 struct pvr2_stream *stream;
27
28 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread started");
29 set_freezable();
30
31 stream = adap->channel.stream->stream;
32
33 for (;;) {
34 if (kthread_should_stop()) break;
35
36 bp = pvr2_stream_get_ready_buffer(stream);
37 if (bp != NULL) {
38 count = pvr2_buffer_get_count(bp);
39 if (count) {
40 dvb_dmx_swfilter(
41 &adap->demux,
42 adap->buffer_storage[
43 pvr2_buffer_get_id(bp)],
44 count);
45 } else {
46 ret = pvr2_buffer_get_status(bp);
47 if (ret < 0) break;
48 }
49 ret = pvr2_buffer_queue(bp);
50 if (ret < 0) break;
51
52 /* Since we know we did something to a buffer,
53 just go back and try again. No point in
54 blocking unless we really ran out of
55 buffers to process. */
56 continue;
57 }
58
59
60 /* Wait until more buffers become available or we're
61 told not to wait any longer. */
62 ret = wait_event_freezable(adap->buffer_wait_data,
63 (pvr2_stream_get_ready_count(stream) > 0) ||
64 kthread_should_stop());
65 if (ret < 0) break;
66 }
67
68 /* If we get here and ret is < 0, then an error has occurred.
69 Probably would be a good idea to communicate that to DVB core... */
70
71 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread stopped");
72
73 return 0;
74 }
75
pvr2_dvb_feed_thread(void * data)76 static int pvr2_dvb_feed_thread(void *data)
77 {
78 int stat = pvr2_dvb_feed_func(data);
79
80 while (!kthread_should_stop()) {
81 set_current_state(TASK_INTERRUPTIBLE);
82 schedule();
83 }
84 return stat;
85 }
86
pvr2_dvb_notify(void * ptr)87 static void pvr2_dvb_notify(void *ptr)
88 {
89 struct pvr2_dvb_adapter *adap = ptr;
90
91 wake_up(&adap->buffer_wait_data);
92 }
93
pvr2_dvb_stream_end(struct pvr2_dvb_adapter * adap)94 static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap)
95 {
96 unsigned int idx;
97 struct pvr2_stream *stream;
98
99 if (adap->thread) {
100 kthread_stop(adap->thread);
101 adap->thread = NULL;
102 }
103
104 if (adap->channel.stream) {
105 stream = adap->channel.stream->stream;
106 } else {
107 stream = NULL;
108 }
109 if (stream) {
110 pvr2_hdw_set_streaming(adap->channel.hdw, 0);
111 pvr2_stream_set_callback(stream, NULL, NULL);
112 pvr2_stream_kill(stream);
113 pvr2_stream_set_buffer_count(stream, 0);
114 pvr2_channel_claim_stream(&adap->channel, NULL);
115 }
116
117 if (adap->stream_run) {
118 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
119 if (!(adap->buffer_storage[idx])) continue;
120 kfree(adap->buffer_storage[idx]);
121 adap->buffer_storage[idx] = NULL;
122 }
123 adap->stream_run = 0;
124 }
125 }
126
pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter * adap)127 static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
128 {
129 struct pvr2_context *pvr = adap->channel.mc_head;
130 unsigned int idx;
131 int ret;
132 struct pvr2_buffer *bp;
133 struct pvr2_stream *stream = NULL;
134
135 if (adap->stream_run) return -EIO;
136
137 ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream);
138 /* somebody else already has the stream */
139 if (ret < 0) return ret;
140
141 stream = adap->channel.stream->stream;
142
143 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
144 adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE,
145 GFP_KERNEL);
146 if (!(adap->buffer_storage[idx])) return -ENOMEM;
147 }
148
149 pvr2_stream_set_callback(pvr->video_stream.stream,
150 pvr2_dvb_notify, adap);
151
152 ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
153 if (ret < 0) return ret;
154
155 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
156 bp = pvr2_stream_get_buffer(stream, idx);
157 pvr2_buffer_set_buffer(bp,
158 adap->buffer_storage[idx],
159 PVR2_DVB_BUFFER_SIZE);
160 }
161
162 ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
163 if (ret < 0) return ret;
164
165 while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) {
166 ret = pvr2_buffer_queue(bp);
167 if (ret < 0) return ret;
168 }
169
170 adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb");
171
172 if (IS_ERR(adap->thread)) {
173 ret = PTR_ERR(adap->thread);
174 adap->thread = NULL;
175 return ret;
176 }
177
178 adap->stream_run = !0;
179
180 return 0;
181 }
182
pvr2_dvb_stream_start(struct pvr2_dvb_adapter * adap)183 static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap)
184 {
185 int ret = pvr2_dvb_stream_do_start(adap);
186 if (ret < 0) pvr2_dvb_stream_end(adap);
187 return ret;
188 }
189
pvr2_dvb_ctrl_feed(struct dvb_demux_feed * dvbdmxfeed,int onoff)190 static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
191 {
192 struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
193 int ret = 0;
194
195 if (adap == NULL) return -ENODEV;
196
197 mutex_lock(&adap->lock);
198 do {
199 if (onoff) {
200 if (!adap->feedcount) {
201 pvr2_trace(PVR2_TRACE_DVB_FEED,
202 "start feeding demux");
203 ret = pvr2_dvb_stream_start(adap);
204 if (ret < 0) break;
205 }
206 (adap->feedcount)++;
207 } else if (adap->feedcount > 0) {
208 (adap->feedcount)--;
209 if (!adap->feedcount) {
210 pvr2_trace(PVR2_TRACE_DVB_FEED,
211 "stop feeding demux");
212 pvr2_dvb_stream_end(adap);
213 }
214 }
215 } while (0);
216 mutex_unlock(&adap->lock);
217
218 return ret;
219 }
220
pvr2_dvb_start_feed(struct dvb_demux_feed * dvbdmxfeed)221 static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
222 {
223 pvr2_trace(PVR2_TRACE_DVB_FEED, "start pid: 0x%04x", dvbdmxfeed->pid);
224 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1);
225 }
226
pvr2_dvb_stop_feed(struct dvb_demux_feed * dvbdmxfeed)227 static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
228 {
229 pvr2_trace(PVR2_TRACE_DVB_FEED, "stop pid: 0x%04x", dvbdmxfeed->pid);
230 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0);
231 }
232
pvr2_dvb_bus_ctrl(struct dvb_frontend * fe,int acquire)233 static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
234 {
235 struct pvr2_dvb_adapter *adap = fe->dvb->priv;
236 return pvr2_channel_limit_inputs(
237 &adap->channel,
238 (acquire ? (1 << PVR2_CVAL_INPUT_DTV) : 0));
239 }
240
pvr2_dvb_adapter_init(struct pvr2_dvb_adapter * adap)241 static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
242 {
243 int ret;
244
245 ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
246 THIS_MODULE/*&hdw->usb_dev->owner*/,
247 &adap->channel.hdw->usb_dev->dev,
248 adapter_nr);
249 if (ret < 0) {
250 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
251 "dvb_register_adapter failed: error %d", ret);
252 goto err;
253 }
254 adap->dvb_adap.priv = adap;
255
256 adap->demux.dmx.capabilities = DMX_TS_FILTERING |
257 DMX_SECTION_FILTERING |
258 DMX_MEMORY_BASED_FILTERING;
259 adap->demux.priv = adap;
260 adap->demux.filternum = 256;
261 adap->demux.feednum = 256;
262 adap->demux.start_feed = pvr2_dvb_start_feed;
263 adap->demux.stop_feed = pvr2_dvb_stop_feed;
264 adap->demux.write_to_decoder = NULL;
265
266 ret = dvb_dmx_init(&adap->demux);
267 if (ret < 0) {
268 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
269 "dvb_dmx_init failed: error %d", ret);
270 goto err_dmx;
271 }
272
273 adap->dmxdev.filternum = adap->demux.filternum;
274 adap->dmxdev.demux = &adap->demux.dmx;
275 adap->dmxdev.capabilities = 0;
276
277 ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
278 if (ret < 0) {
279 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
280 "dvb_dmxdev_init failed: error %d", ret);
281 goto err_dmx_dev;
282 }
283
284 dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
285
286 return 0;
287
288 err_dmx_dev:
289 dvb_dmx_release(&adap->demux);
290 err_dmx:
291 dvb_unregister_adapter(&adap->dvb_adap);
292 err:
293 return ret;
294 }
295
pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter * adap)296 static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
297 {
298 pvr2_trace(PVR2_TRACE_INFO, "unregistering DVB devices");
299 dvb_net_release(&adap->dvb_net);
300 adap->demux.dmx.close(&adap->demux.dmx);
301 dvb_dmxdev_release(&adap->dmxdev);
302 dvb_dmx_release(&adap->demux);
303 dvb_unregister_adapter(&adap->dvb_adap);
304 return 0;
305 }
306
pvr2_dvb_frontend_init(struct pvr2_dvb_adapter * adap)307 static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
308 {
309 struct pvr2_hdw *hdw = adap->channel.hdw;
310 const struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;
311 int ret = 0;
312
313 if (dvb_props == NULL) {
314 pvr2_trace(PVR2_TRACE_ERROR_LEGS, "fe_props not defined!");
315 return -EINVAL;
316 }
317
318 ret = pvr2_channel_limit_inputs(
319 &adap->channel,
320 (1 << PVR2_CVAL_INPUT_DTV));
321 if (ret) {
322 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
323 "failed to grab control of dtv input (code=%d)",
324 ret);
325 return ret;
326 }
327
328 if (dvb_props->frontend_attach == NULL) {
329 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
330 "frontend_attach not defined!");
331 ret = -EINVAL;
332 goto done;
333 }
334
335 if (dvb_props->frontend_attach(adap) == 0 && adap->fe[0]) {
336 if (dvb_register_frontend(&adap->dvb_adap, adap->fe[0])) {
337 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
338 "frontend registration failed!");
339 ret = -ENODEV;
340 goto fail_frontend0;
341 }
342 if (adap->fe[0]->ops.analog_ops.standby)
343 adap->fe[0]->ops.analog_ops.standby(adap->fe[0]);
344
345 pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()",
346 adap->fe[0]->id);
347 adap->fe[0]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
348 } else {
349 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
350 "no frontend was attached!");
351 ret = -ENODEV;
352 return ret;
353 }
354
355 if (dvb_props->tuner_attach && dvb_props->tuner_attach(adap)) {
356 pvr2_trace(PVR2_TRACE_ERROR_LEGS, "tuner attach failed");
357 ret = -ENODEV;
358 goto fail_tuner;
359 }
360
361 if (adap->fe[1]) {
362 adap->fe[1]->id = 1;
363 adap->fe[1]->tuner_priv = adap->fe[0]->tuner_priv;
364 memcpy(&adap->fe[1]->ops.tuner_ops,
365 &adap->fe[0]->ops.tuner_ops,
366 sizeof(struct dvb_tuner_ops));
367
368 if (dvb_register_frontend(&adap->dvb_adap, adap->fe[1])) {
369 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
370 "frontend registration failed!");
371 ret = -ENODEV;
372 goto fail_frontend1;
373 }
374 /* MFE lock */
375 adap->dvb_adap.mfe_shared = 1;
376
377 if (adap->fe[1]->ops.analog_ops.standby)
378 adap->fe[1]->ops.analog_ops.standby(adap->fe[1]);
379
380 pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()",
381 adap->fe[1]->id);
382 adap->fe[1]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
383 }
384 done:
385 pvr2_channel_limit_inputs(&adap->channel, 0);
386 return ret;
387
388 fail_frontend1:
389 dvb_frontend_detach(adap->fe[1]);
390 adap->fe[1] = NULL;
391 fail_tuner:
392 dvb_unregister_frontend(adap->fe[0]);
393 fail_frontend0:
394 dvb_frontend_detach(adap->fe[0]);
395 adap->fe[0] = NULL;
396 dvb_module_release(adap->i2c_client_tuner);
397 dvb_module_release(adap->i2c_client_demod[1]);
398 dvb_module_release(adap->i2c_client_demod[0]);
399
400 return ret;
401 }
402
pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter * adap)403 static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
404 {
405 if (adap->fe[1]) {
406 dvb_unregister_frontend(adap->fe[1]);
407 dvb_frontend_detach(adap->fe[1]);
408 adap->fe[1] = NULL;
409 }
410 if (adap->fe[0]) {
411 dvb_unregister_frontend(adap->fe[0]);
412 dvb_frontend_detach(adap->fe[0]);
413 adap->fe[0] = NULL;
414 }
415
416 dvb_module_release(adap->i2c_client_tuner);
417 adap->i2c_client_tuner = NULL;
418 dvb_module_release(adap->i2c_client_demod[1]);
419 adap->i2c_client_demod[1] = NULL;
420 dvb_module_release(adap->i2c_client_demod[0]);
421 adap->i2c_client_demod[0] = NULL;
422
423 return 0;
424 }
425
pvr2_dvb_destroy(struct pvr2_dvb_adapter * adap)426 static void pvr2_dvb_destroy(struct pvr2_dvb_adapter *adap)
427 {
428 pvr2_dvb_stream_end(adap);
429 pvr2_dvb_frontend_exit(adap);
430 pvr2_dvb_adapter_exit(adap);
431 pvr2_channel_done(&adap->channel);
432 kfree(adap);
433 }
434
pvr2_dvb_internal_check(struct pvr2_channel * chp)435 static void pvr2_dvb_internal_check(struct pvr2_channel *chp)
436 {
437 struct pvr2_dvb_adapter *adap;
438 adap = container_of(chp, struct pvr2_dvb_adapter, channel);
439 if (!adap->channel.mc_head->disconnect_flag) return;
440 pvr2_dvb_destroy(adap);
441 }
442
pvr2_dvb_create(struct pvr2_context * pvr)443 struct pvr2_dvb_adapter *pvr2_dvb_create(struct pvr2_context *pvr)
444 {
445 int ret = 0;
446 struct pvr2_dvb_adapter *adap;
447 if (!pvr->hdw->hdw_desc->dvb_props) {
448 /* Device lacks a digital interface so don't set up
449 the DVB side of the driver either. For now. */
450 return NULL;
451 }
452 adap = kzalloc(sizeof(*adap), GFP_KERNEL);
453 if (!adap) return adap;
454 pvr2_channel_init(&adap->channel, pvr);
455 adap->channel.check_func = pvr2_dvb_internal_check;
456 init_waitqueue_head(&adap->buffer_wait_data);
457 mutex_init(&adap->lock);
458 ret = pvr2_dvb_adapter_init(adap);
459 if (ret < 0) goto fail1;
460 ret = pvr2_dvb_frontend_init(adap);
461 if (ret < 0) goto fail2;
462 return adap;
463
464 fail2:
465 pvr2_dvb_adapter_exit(adap);
466 fail1:
467 pvr2_channel_done(&adap->channel);
468 return NULL;
469 }
470
471