1/*
2 * FireDTV driver (formerly known as FireSAT)
3 *
4 * Copyright (C) 2004 Andreas Monitzer <andy@monitzer.com>
5 * Copyright (C) 2008 Henrik Kurelid <henrik@kurelid.se>
6 *
7 *	This program is free software; you can redistribute it and/or
8 *	modify it under the terms of the GNU General Public License as
9 *	published by the Free Software Foundation; either version 2 of
10 *	the License, or (at your option) any later version.
11 */
12
13#include <linux/bitops.h>
14#include <linux/device.h>
15#include <linux/errno.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/mutex.h>
19#include <linux/types.h>
20
21#include <dmxdev.h>
22#include <dvb_demux.h>
23#include <dvbdev.h>
24#include <dvb_frontend.h>
25
26#include "firedtv.h"
27
28static int alloc_channel(struct firedtv *fdtv)
29{
30	int i;
31
32	for (i = 0; i < 16; i++)
33		if (!__test_and_set_bit(i, &fdtv->channel_active))
34			break;
35	return i;
36}
37
38static void collect_channels(struct firedtv *fdtv, int *pidc, u16 pid[])
39{
40	int i, n;
41
42	for (i = 0, n = 0; i < 16; i++)
43		if (test_bit(i, &fdtv->channel_active))
44			pid[n++] = fdtv->channel_pid[i];
45	*pidc = n;
46}
47
48static inline void dealloc_channel(struct firedtv *fdtv, int i)
49{
50	__clear_bit(i, &fdtv->channel_active);
51}
52
53int fdtv_start_feed(struct dvb_demux_feed *dvbdmxfeed)
54{
55	struct firedtv *fdtv = dvbdmxfeed->demux->priv;
56	int pidc, c, ret;
57	u16 pids[16];
58
59	switch (dvbdmxfeed->type) {
60	case DMX_TYPE_TS:
61	case DMX_TYPE_SEC:
62		break;
63	default:
64		dev_err(fdtv->device, "can't start dmx feed: invalid type %u\n",
65			dvbdmxfeed->type);
66		return -EINVAL;
67	}
68
69	if (mutex_lock_interruptible(&fdtv->demux_mutex))
70		return -EINTR;
71
72	if (dvbdmxfeed->type == DMX_TYPE_TS) {
73		switch (dvbdmxfeed->pes_type) {
74		case DMX_PES_VIDEO:
75		case DMX_PES_AUDIO:
76		case DMX_PES_TELETEXT:
77		case DMX_PES_PCR:
78		case DMX_PES_OTHER:
79			c = alloc_channel(fdtv);
80			break;
81		default:
82			dev_err(fdtv->device,
83				"can't start dmx feed: invalid pes type %u\n",
84				dvbdmxfeed->pes_type);
85			ret = -EINVAL;
86			goto out;
87		}
88	} else {
89		c = alloc_channel(fdtv);
90	}
91
92	if (c > 15) {
93		dev_err(fdtv->device, "can't start dmx feed: busy\n");
94		ret = -EBUSY;
95		goto out;
96	}
97
98	dvbdmxfeed->priv = (typeof(dvbdmxfeed->priv))(unsigned long)c;
99	fdtv->channel_pid[c] = dvbdmxfeed->pid;
100	collect_channels(fdtv, &pidc, pids);
101
102	if (dvbdmxfeed->pid == 8192) {
103		ret = avc_tuner_get_ts(fdtv);
104		if (ret) {
105			dealloc_channel(fdtv, c);
106			dev_err(fdtv->device, "can't get TS\n");
107			goto out;
108		}
109	} else {
110		ret = avc_tuner_set_pids(fdtv, pidc, pids);
111		if (ret) {
112			dealloc_channel(fdtv, c);
113			dev_err(fdtv->device, "can't set PIDs\n");
114			goto out;
115		}
116	}
117out:
118	mutex_unlock(&fdtv->demux_mutex);
119
120	return ret;
121}
122
123int fdtv_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
124{
125	struct dvb_demux *demux = dvbdmxfeed->demux;
126	struct firedtv *fdtv = demux->priv;
127	int pidc, c, ret;
128	u16 pids[16];
129
130	if (dvbdmxfeed->type == DMX_TYPE_TS &&
131	    !((dvbdmxfeed->ts_type & TS_PACKET) &&
132	      (demux->dmx.frontend->source != DMX_MEMORY_FE))) {
133
134		if (dvbdmxfeed->ts_type & TS_DECODER) {
135			if (dvbdmxfeed->pes_type >= DMX_PES_OTHER ||
136			    !demux->pesfilter[dvbdmxfeed->pes_type])
137				return -EINVAL;
138
139			demux->pids[dvbdmxfeed->pes_type] |= 0x8000;
140			demux->pesfilter[dvbdmxfeed->pes_type] = NULL;
141		}
142
143		if (!(dvbdmxfeed->ts_type & TS_DECODER &&
144		      dvbdmxfeed->pes_type < DMX_PES_OTHER))
145			return 0;
146	}
147
148	if (mutex_lock_interruptible(&fdtv->demux_mutex))
149		return -EINTR;
150
151	c = (unsigned long)dvbdmxfeed->priv;
152	dealloc_channel(fdtv, c);
153	collect_channels(fdtv, &pidc, pids);
154
155	ret = avc_tuner_set_pids(fdtv, pidc, pids);
156
157	mutex_unlock(&fdtv->demux_mutex);
158
159	return ret;
160}
161
162DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
163
164int fdtv_dvb_register(struct firedtv *fdtv, const char *name)
165{
166	int err;
167
168	err = dvb_register_adapter(&fdtv->adapter, name,
169				   THIS_MODULE, fdtv->device, adapter_nr);
170	if (err < 0)
171		goto fail_log;
172
173	/*DMX_TS_FILTERING | DMX_SECTION_FILTERING*/
174	fdtv->demux.dmx.capabilities = 0;
175
176	fdtv->demux.priv	= fdtv;
177	fdtv->demux.filternum	= 16;
178	fdtv->demux.feednum	= 16;
179	fdtv->demux.start_feed	= fdtv_start_feed;
180	fdtv->demux.stop_feed	= fdtv_stop_feed;
181	fdtv->demux.write_to_decoder = NULL;
182
183	err = dvb_dmx_init(&fdtv->demux);
184	if (err)
185		goto fail_unreg_adapter;
186
187	fdtv->dmxdev.filternum    = 16;
188	fdtv->dmxdev.demux        = &fdtv->demux.dmx;
189	fdtv->dmxdev.capabilities = 0;
190
191	err = dvb_dmxdev_init(&fdtv->dmxdev, &fdtv->adapter);
192	if (err)
193		goto fail_dmx_release;
194
195	fdtv->frontend.source = DMX_FRONTEND_0;
196
197	err = fdtv->demux.dmx.add_frontend(&fdtv->demux.dmx, &fdtv->frontend);
198	if (err)
199		goto fail_dmxdev_release;
200
201	err = fdtv->demux.dmx.connect_frontend(&fdtv->demux.dmx,
202					       &fdtv->frontend);
203	if (err)
204		goto fail_rem_frontend;
205
206	err = dvb_net_init(&fdtv->adapter, &fdtv->dvbnet, &fdtv->demux.dmx);
207	if (err)
208		goto fail_disconnect_frontend;
209
210	fdtv_frontend_init(fdtv, name);
211	err = dvb_register_frontend(&fdtv->adapter, &fdtv->fe);
212	if (err)
213		goto fail_net_release;
214
215	err = fdtv_ca_register(fdtv);
216	if (err)
217		dev_info(fdtv->device,
218			 "Conditional Access Module not enabled\n");
219	return 0;
220
221fail_net_release:
222	dvb_net_release(&fdtv->dvbnet);
223fail_disconnect_frontend:
224	fdtv->demux.dmx.close(&fdtv->demux.dmx);
225fail_rem_frontend:
226	fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
227fail_dmxdev_release:
228	dvb_dmxdev_release(&fdtv->dmxdev);
229fail_dmx_release:
230	dvb_dmx_release(&fdtv->demux);
231fail_unreg_adapter:
232	dvb_unregister_adapter(&fdtv->adapter);
233fail_log:
234	dev_err(fdtv->device, "DVB initialization failed\n");
235	return err;
236}
237
238void fdtv_dvb_unregister(struct firedtv *fdtv)
239{
240	fdtv_ca_release(fdtv);
241	dvb_unregister_frontend(&fdtv->fe);
242	dvb_net_release(&fdtv->dvbnet);
243	fdtv->demux.dmx.close(&fdtv->demux.dmx);
244	fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
245	dvb_dmxdev_release(&fdtv->dmxdev);
246	dvb_dmx_release(&fdtv->demux);
247	dvb_unregister_adapter(&fdtv->adapter);
248}
249