Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * |
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. | |
7 | * | |
8 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs] | |
9 | * | |
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. | |
14 | */ | |
15 | ||
674434c6 | 16 | |
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/device.h> | |
20 | #include <linux/fs.h> | |
21 | #include <linux/kthread.h> | |
22 | #include <linux/file.h> | |
7dfb7103 | 23 | #include <linux/freezer.h> |
1da177e4 LT |
24 | |
25 | #include <media/video-buf.h> | |
26 | #include <media/video-buf-dvb.h> | |
27 | ||
28 | /* ------------------------------------------------------------------ */ | |
29 | ||
30 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | static unsigned int debug = 0; | |
34 | module_param(debug, int, 0644); | |
35 | MODULE_PARM_DESC(debug,"enable debug messages"); | |
36 | ||
37 | #define dprintk(fmt, arg...) if (debug) \ | |
38 | printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg) | |
39 | ||
40 | /* ------------------------------------------------------------------ */ | |
41 | ||
42 | static int videobuf_dvb_thread(void *data) | |
43 | { | |
44 | struct videobuf_dvb *dvb = data; | |
45 | struct videobuf_buffer *buf; | |
46 | unsigned long flags; | |
47 | int err; | |
48 | ||
49 | dprintk("dvb thread started\n"); | |
83144186 | 50 | set_freezable(); |
1da177e4 LT |
51 | videobuf_read_start(&dvb->dvbq); |
52 | ||
53 | for (;;) { | |
54 | /* fetch next buffer */ | |
55 | buf = list_entry(dvb->dvbq.stream.next, | |
56 | struct videobuf_buffer, stream); | |
57 | list_del(&buf->stream); | |
58 | err = videobuf_waiton(buf,0,1); | |
59 | BUG_ON(0 != err); | |
60 | ||
61 | /* no more feeds left or stop_feed() asked us to quit */ | |
62 | if (0 == dvb->nfeeds) | |
63 | break; | |
64 | if (kthread_should_stop()) | |
65 | break; | |
3e1d1d28 | 66 | try_to_freeze(); |
1da177e4 LT |
67 | |
68 | /* feed buffer data to demux */ | |
69 | if (buf->state == STATE_DONE) | |
70 | dvb_dmx_swfilter(&dvb->demux, buf->dma.vmalloc, | |
71 | buf->size); | |
72 | ||
73 | /* requeue buffer */ | |
74 | list_add_tail(&buf->stream,&dvb->dvbq.stream); | |
75 | spin_lock_irqsave(dvb->dvbq.irqlock,flags); | |
76 | dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf); | |
77 | spin_unlock_irqrestore(dvb->dvbq.irqlock,flags); | |
78 | } | |
79 | ||
80 | videobuf_read_stop(&dvb->dvbq); | |
81 | dprintk("dvb thread stopped\n"); | |
82 | ||
83 | /* Hmm, linux becomes *very* unhappy without this ... */ | |
84 | while (!kthread_should_stop()) { | |
85 | set_current_state(TASK_INTERRUPTIBLE); | |
86 | schedule(); | |
87 | } | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed) | |
92 | { | |
93 | struct dvb_demux *demux = feed->demux; | |
94 | struct videobuf_dvb *dvb = demux->priv; | |
95 | int rc; | |
96 | ||
97 | if (!demux->dmx.frontend) | |
98 | return -EINVAL; | |
99 | ||
3593cab5 | 100 | mutex_lock(&dvb->lock); |
1da177e4 LT |
101 | dvb->nfeeds++; |
102 | rc = dvb->nfeeds; | |
103 | ||
104 | if (NULL != dvb->thread) | |
105 | goto out; | |
106 | dvb->thread = kthread_run(videobuf_dvb_thread, | |
107 | dvb, "%s dvb", dvb->name); | |
108 | if (IS_ERR(dvb->thread)) { | |
109 | rc = PTR_ERR(dvb->thread); | |
110 | dvb->thread = NULL; | |
111 | } | |
112 | ||
113 | out: | |
3593cab5 | 114 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
115 | return rc; |
116 | } | |
117 | ||
118 | static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed) | |
119 | { | |
120 | struct dvb_demux *demux = feed->demux; | |
121 | struct videobuf_dvb *dvb = demux->priv; | |
122 | int err = 0; | |
123 | ||
3593cab5 | 124 | mutex_lock(&dvb->lock); |
1da177e4 LT |
125 | dvb->nfeeds--; |
126 | if (0 == dvb->nfeeds && NULL != dvb->thread) { | |
127 | // FIXME: cx8802_cancel_buffers(dev); | |
128 | err = kthread_stop(dvb->thread); | |
129 | dvb->thread = NULL; | |
130 | } | |
3593cab5 | 131 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
132 | return err; |
133 | } | |
134 | ||
135 | /* ------------------------------------------------------------------ */ | |
136 | ||
137 | int videobuf_dvb_register(struct videobuf_dvb *dvb, | |
138 | struct module *module, | |
d09dbf92 AQ |
139 | void *adapter_priv, |
140 | struct device *device) | |
1da177e4 LT |
141 | { |
142 | int result; | |
143 | ||
3593cab5 | 144 | mutex_init(&dvb->lock); |
1da177e4 LT |
145 | |
146 | /* register adapter */ | |
d09dbf92 | 147 | result = dvb_register_adapter(&dvb->adapter, dvb->name, module, device); |
1da177e4 LT |
148 | if (result < 0) { |
149 | printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n", | |
150 | dvb->name, result); | |
151 | goto fail_adapter; | |
152 | } | |
fdc53a6d | 153 | dvb->adapter.priv = adapter_priv; |
1da177e4 LT |
154 | |
155 | /* register frontend */ | |
fdc53a6d | 156 | result = dvb_register_frontend(&dvb->adapter, dvb->frontend); |
1da177e4 LT |
157 | if (result < 0) { |
158 | printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n", | |
159 | dvb->name, result); | |
160 | goto fail_frontend; | |
161 | } | |
162 | ||
163 | /* register demux stuff */ | |
164 | dvb->demux.dmx.capabilities = | |
165 | DMX_TS_FILTERING | DMX_SECTION_FILTERING | | |
166 | DMX_MEMORY_BASED_FILTERING; | |
167 | dvb->demux.priv = dvb; | |
168 | dvb->demux.filternum = 256; | |
169 | dvb->demux.feednum = 256; | |
170 | dvb->demux.start_feed = videobuf_dvb_start_feed; | |
171 | dvb->demux.stop_feed = videobuf_dvb_stop_feed; | |
172 | result = dvb_dmx_init(&dvb->demux); | |
173 | if (result < 0) { | |
174 | printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n", | |
175 | dvb->name, result); | |
176 | goto fail_dmx; | |
177 | } | |
178 | ||
179 | dvb->dmxdev.filternum = 256; | |
180 | dvb->dmxdev.demux = &dvb->demux.dmx; | |
181 | dvb->dmxdev.capabilities = 0; | |
fdc53a6d | 182 | result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter); |
1da177e4 LT |
183 | if (result < 0) { |
184 | printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n", | |
185 | dvb->name, result); | |
186 | goto fail_dmxdev; | |
187 | } | |
188 | ||
189 | dvb->fe_hw.source = DMX_FRONTEND_0; | |
190 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
191 | if (result < 0) { | |
192 | printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n", | |
193 | dvb->name, result); | |
194 | goto fail_fe_hw; | |
195 | } | |
196 | ||
197 | dvb->fe_mem.source = DMX_MEMORY_FE; | |
198 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
199 | if (result < 0) { | |
200 | printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n", | |
201 | dvb->name, result); | |
202 | goto fail_fe_mem; | |
203 | } | |
204 | ||
205 | result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
206 | if (result < 0) { | |
207 | printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n", | |
208 | dvb->name, result); | |
209 | goto fail_fe_conn; | |
210 | } | |
211 | ||
212 | /* register network adapter */ | |
fdc53a6d | 213 | dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx); |
1da177e4 LT |
214 | return 0; |
215 | ||
216 | fail_fe_conn: | |
217 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
218 | fail_fe_mem: | |
219 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
220 | fail_fe_hw: | |
221 | dvb_dmxdev_release(&dvb->dmxdev); | |
222 | fail_dmxdev: | |
223 | dvb_dmx_release(&dvb->demux); | |
224 | fail_dmx: | |
225 | dvb_unregister_frontend(dvb->frontend); | |
226 | fail_frontend: | |
f52a838b | 227 | dvb_frontend_detach(dvb->frontend); |
fdc53a6d | 228 | dvb_unregister_adapter(&dvb->adapter); |
1da177e4 LT |
229 | fail_adapter: |
230 | return result; | |
231 | } | |
232 | ||
233 | void videobuf_dvb_unregister(struct videobuf_dvb *dvb) | |
234 | { | |
235 | dvb_net_release(&dvb->net); | |
236 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
237 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
238 | dvb_dmxdev_release(&dvb->dmxdev); | |
239 | dvb_dmx_release(&dvb->demux); | |
240 | dvb_unregister_frontend(dvb->frontend); | |
f52a838b | 241 | dvb_frontend_detach(dvb->frontend); |
fdc53a6d | 242 | dvb_unregister_adapter(&dvb->adapter); |
1da177e4 LT |
243 | } |
244 | ||
245 | EXPORT_SYMBOL(videobuf_dvb_register); | |
246 | EXPORT_SYMBOL(videobuf_dvb_unregister); | |
247 | ||
248 | /* ------------------------------------------------------------------ */ | |
249 | /* | |
250 | * Local variables: | |
251 | * c-basic-offset: 8 | |
252 | * compile-command: "make DVB=1" | |
253 | * End: | |
254 | */ | |
674434c6 | 255 |