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
alloc_channel(struct firedtv * fdtv)24 static 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
collect_channels(struct firedtv * fdtv,int * pidc,u16 pid[])34 static 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
dealloc_channel(struct firedtv * fdtv,int i)44 static inline void dealloc_channel(struct firedtv *fdtv, int i)
45 {
46 __clear_bit(i, &fdtv->channel_active);
47 }
48
fdtv_start_feed(struct dvb_demux_feed * dvbdmxfeed)49 int 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 }
113 out:
114 mutex_unlock(&fdtv->demux_mutex);
115
116 return ret;
117 }
118
fdtv_stop_feed(struct dvb_demux_feed * dvbdmxfeed)119 int 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
158 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
159
fdtv_dvb_register(struct firedtv * fdtv,const char * name)160 int 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
217 fail_net_release:
218 dvb_net_release(&fdtv->dvbnet);
219 fail_disconnect_frontend:
220 fdtv->demux.dmx.close(&fdtv->demux.dmx);
221 fail_rem_frontend:
222 fdtv->demux.dmx.remove_frontend(&fdtv->demux.dmx, &fdtv->frontend);
223 fail_dmxdev_release:
224 dvb_dmxdev_release(&fdtv->dmxdev);
225 fail_dmx_release:
226 dvb_dmx_release(&fdtv->demux);
227 fail_unreg_adapter:
228 dvb_unregister_adapter(&fdtv->adapter);
229 fail_log:
230 dev_err(fdtv->device, "DVB initialization failed\n");
231 return err;
232 }
233
fdtv_dvb_unregister(struct firedtv * fdtv)234 void 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 }
245