firedtv-dvb.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * FireDTV driver (formerly known as FireSAT)
  4 *
  5 * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
  6 * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
  7 */
  8
  9#include <linux/bitops.h>
 10#include <linux/device.h>
 11#include <linux/errno.h>
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/mutex.h>
 15#include <linux/types.h>
 16
 17#include <media/dmxdev.h>
 18#include <media/dvb_demux.h>
 19#include <media/dvbdev.h>
 20#include <media/dvb_frontend.h>
 21
 22#include "firedtv.h"
 23
 24static int alloc_channel(struct firedtv *fdtv)
 25{
 26	int i;
 27
 28	for (i = 0; i < 16; i++)
 29		if (!__test_and_set_bit(i, &fdtv->channel_active))
 30			break;
 31	return i;
 32}
 33
 34static void collect_channels(struct firedtv *fdtv, int *pidc, u16 pid[])
 35{
 36	int i, n;
 37
 38	for (i = 0, n = 0; i < 16; i++)
 39		if (test_bit(i, &fdtv->channel_active))
 40			pid[n++] = fdtv->channel_pid[i];
 41	*pidc = n;
 42}
 43
 44static inline void dealloc_channel(struct firedtv *fdtv, int i)
 45{
 46	__clear_bit(i, &fdtv->channel_active);
 47}
 48
 49int fdtv_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 50{
 51	struct firedtv *fdtv = dvbdmxfeed->demux->priv;
 52	int pidc, c, ret;
 53	u16 pids[16];
 54
 55	switch (dvbdmxfeed->type) {
 56	case DMX_TYPE_TS:
 57	case DMX_TYPE_SEC:
 58		break;
 59	default:
 60		dev_err(fdtv->device, "can't start dmx feed: invalid type %u\n",
 61			dvbdmxfeed->type);
 62		return -EINVAL;
 63	}
 64
 65	if (mutex_lock_interruptible(&fdtv->demux_mutex))
 66		return -EINTR;
 67
 68	if (dvbdmxfeed->type == DMX_TYPE_TS) {
 69		switch (dvbdmxfeed->pes_type) {
 70		case DMX_PES_VIDEO:
 71		case DMX_PES_AUDIO:
 72		case DMX_PES_TELETEXT:
 73		case DMX_PES_PCR:
 74		case DMX_PES_OTHER:
 75			c = alloc_channel(fdtv);
 76			break;
 77		default:
 78			dev_err(fdtv->device,
 79				"can't start dmx feed: invalid pes type %u\n",
 80				dvbdmxfeed->pes_type);
 81			ret = -EINVAL;
 82			goto out;
 83		}
 84	} else {
 85		c = alloc_channel(fdtv);
 86	}
 87
 88	if (c > 15) {
 89		dev_err(fdtv->device, "can't start dmx feed: busy\n");
 90		ret = -EBUSY;
 91		goto out;
 92	}
 93
 94	dvbdmxfeed->priv = (typeof(dvbdmxfeed->priv))(unsigned long)c;
 95	fdtv->channel_pid[c] = dvbdmxfeed->pid;
 96	collect_channels(fdtv, &pidc, pids);
 97
 98	if (dvbdmxfeed->pid == 8192) {
 99		ret = avc_tuner_get_ts(fdtv);
100		if (ret) {
101			dealloc_channel(fdtv, c);
102			dev_err(fdtv->device, "can't get TS\n");
103			goto out;
104		}
105	} else {
106		ret = avc_tuner_set_pids(fdtv, pidc, pids);
107		if (ret) {
108			dealloc_channel(fdtv, c);
109			dev_err(fdtv->device, "can't set PIDs\n");
110			goto out;
111		}
112	}
113out:
114	mutex_unlock(&fdtv->demux_mutex);
115
116	return ret;
117}
118
119int fdtv_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
120{
121	struct dvb_demux *demux = dvbdmxfeed->demux;
122	struct firedtv *fdtv = demux->priv;
123	int pidc, c, ret;
124	u16 pids[16];
125
126	if (dvbdmxfeed->type == DMX_TYPE_TS &&
127	    !((dvbdmxfeed->ts_type & TS_PACKET) &&
128	      (demux->dmx.frontend->source != DMX_MEMORY_FE))) {
129
130		if (dvbdmxfeed->ts_type & TS_DECODER) {
131			if (dvbdmxfeed->pes_type >= DMX_PES_OTHER ||
132			    !demux->pesfilter[dvbdmxfeed->pes_type])
133				return -EINVAL;
134
135			demux->pids[dvbdmxfeed->pes_type] |= 0x8000;
136			demux->pesfilter[dvbdmxfeed->pes_type] = NULL;
137		}
138
139		if (!(dvbdmxfeed->ts_type & TS_DECODER &&
140		      dvbdmxfeed->pes_type < DMX_PES_OTHER))
141			return 0;
142	}
143
144	if (mutex_lock_interruptible(&fdtv->demux_mutex))
145		return -EINTR;
146
147	c = (unsigned long)dvbdmxfeed->priv;
148	dealloc_channel(fdtv, c);
149	collect_channels(fdtv, &pidc, pids);
150
151	ret = avc_tuner_set_pids(fdtv, pidc, pids);
152
153	mutex_unlock(&fdtv->demux_mutex);
154
155	return ret;
156}
157
158DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
159
160int fdtv_dvb_register(struct firedtv *fdtv, const char *name)
161{
162	int err;
163
164	err = dvb_register_adapter(&fdtv->adapter, name,
165				   THIS_MODULE, fdtv->device, adapter_nr);
166	if (err < 0)
167		goto fail_log;
168
169	/*DMX_TS_FILTERING | DMX_SECTION_FILTERING*/
170	fdtv->demux.dmx.capabilities = 0;
171
172	fdtv->demux.priv	= fdtv;
173	fdtv->demux.filternum	= 16;
174	fdtv->demux.feednum	= 16;
175	fdtv->demux.start_feed	= fdtv_start_feed;
176	fdtv->demux.stop_feed	= fdtv_stop_feed;
177	fdtv->demux.write_to_decoder = NULL;
178
179	err = dvb_dmx_init(&fdtv->demux);
180	if (err)
181		goto fail_unreg_adapter;
182
183	fdtv->dmxdev.filternum    = 16;
184	fdtv->dmxdev.demux        = &fdtv->demux.dmx;
185	fdtv->dmxdev.capabilities = 0;
186
187	err = dvb_dmxdev_init(&fdtv->dmxdev, &fdtv->adapter);
188	if (err)
189		goto fail_dmx_release;
190
191	fdtv->frontend.source = DMX_FRONTEND_0;
192
193	err = fdtv->demux.dmx.add_frontend(&fdtv->demux.dmx, &fdtv->frontend);
194	if (err)
195		goto fail_dmxdev_release;
196
197	err = fdtv->demux.dmx.connect_frontend(&fdtv->demux.dmx,
198					       &fdtv->frontend);
199	if (err)
200		goto fail_rem_frontend;
201
202	err = dvb_net_init(&fdtv->adapter, &fdtv->dvbnet, &fdtv->demux.dmx);
203	if (err)
204		goto fail_disconnect_frontend;
205
206	fdtv_frontend_init(fdtv, name);
207	err = dvb_register_frontend(&fdtv->adapter, &fdtv->fe);
208	if (err)
209		goto fail_net_release;
210
211	err = fdtv_ca_register(fdtv);
212	if (err)
213		dev_info(fdtv->device,
214			 "Conditional Access Module not enabled\n");
215	return 0;
216
217fail_net_release:
218	dvb_net_release(&fdtv->dvbnet);
219fail_disconnect_frontend:
220	fdtv->demux.dmx.close(&fdtv->demux.dmx);
221fail_rem_frontend:
222	fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
223fail_dmxdev_release:
224	dvb_dmxdev_release(&fdtv->dmxdev);
225fail_dmx_release:
226	dvb_dmx_release(&fdtv->demux);
227fail_unreg_adapter:
228	dvb_unregister_adapter(&fdtv->adapter);
229fail_log:
230	dev_err(fdtv->device, "DVB initialization failed\n");
231	return err;
232}
233
234void fdtv_dvb_unregister(struct firedtv *fdtv)
235{
236	fdtv_ca_release(fdtv);
237	dvb_unregister_frontend(&fdtv->fe);
238	dvb_net_release(&fdtv->dvbnet);
239	fdtv->demux.dmx.close(&fdtv->demux.dmx);
240	fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
241	dvb_dmxdev_release(&fdtv->dmxdev);
242	dvb_dmx_release(&fdtv->demux);
243	dvb_unregister_adapter(&fdtv->adapter);
244}