err.no Git - linux-2.6/blob - drivers/media/video/pvrusb2/pvrusb2-dvb.c

   1 /*
   2  *  pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
   3  *
   4  *  Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <linux/kthread.h>
  22 #include <linux/freezer.h>
  23 #include "dvbdev.h"
  24 #include "pvrusb2-hdw-internal.h"
  25 #include "pvrusb2-hdw.h"
  26 #include "pvrusb2-io.h"
  27 #include "pvrusb2-dvb.h"
  28
  29 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  30
  31 static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
  32 {
  33         int ret;
  34         unsigned int count;
  35         struct pvr2_buffer *bp;
  36         struct pvr2_stream *stream;
  37
  38         printk(KERN_DEBUG "dvb thread started\n");
  39         set_freezable();
  40
  41         stream = adap->channel.stream->stream;
  42
  43         for (;;) {
  44                 if (adap->feed_thread_stop) break;
  45                 if (kthread_should_stop()) break;
  46
  47                 /* Not sure about this... */
  48                 try_to_freeze();
  49
  50                 bp = pvr2_stream_get_ready_buffer(stream);
  51                 if (bp != NULL) {
  52                         count = pvr2_buffer_get_count(bp);
  53                         if (count) {
  54                                 dvb_dmx_swfilter(
  55                                         &adap->demux,
  56                                         adap->buffer_storage[
  57                                             pvr2_buffer_get_id(bp)],
  58                                         count);
  59                         } else {
  60                                 ret = pvr2_buffer_get_status(bp);
  61                                 if (ret < 0) break;
  62                         }
  63                         ret = pvr2_buffer_queue(bp);
  64                         if (ret < 0) break;
  65
  66                         /* Since we know we did something to a buffer,
  67                            just go back and try again.  No point in
  68                            blocking unless we really ran out of
  69                            buffers to process. */
  70                         continue;
  71                 }
  72
  73
  74                 /* Wait until more buffers become available or we're
  75                    told not to wait any longer. */
  76                 ret = wait_event_interruptible(
  77                     adap->buffer_wait_data,
  78                     (pvr2_stream_get_ready_count(stream) > 0) ||
  79                     adap->feed_thread_stop);
  80                 if (ret < 0) break;
  81         }
  82
  83         /* If we get here and ret is < 0, then an error has occurred.
  84            Probably would be a good idea to communicate that to DVB core... */
  85
  86         printk(KERN_DEBUG "dvb thread stopped\n");
  87
  88         return 0;
  89 }
  90
  91 static int pvr2_dvb_feed_thread(void *data)
  92 {
  93         int stat = pvr2_dvb_feed_func(data);
  94         /* from videobuf-dvb.c: */
  95         while (!kthread_should_stop()) {
  96                 set_current_state(TASK_INTERRUPTIBLE);
  97                 schedule();
  98         }
  99         return stat;
 100 }
 101
 102 static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap)
 103 {
 104         wake_up(&adap->buffer_wait_data);
 105 }
 106
 107 static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap)
 108 {
 109         unsigned int idx;
 110         struct pvr2_stream *stream;
 111
 112         if (adap->thread) {
 113                 adap->feed_thread_stop = !0;
 114                 pvr2_dvb_notify(adap);
 115                 kthread_stop(adap->thread);
 116                 adap->thread = NULL;
 117         }
 118
 119         if (adap->channel.stream) {
 120                 stream = adap->channel.stream->stream;
 121         } else {
 122                 stream = NULL;
 123         }
 124         if (stream) {
 125                 pvr2_hdw_set_streaming(adap->channel.hdw, 0);
 126                 pvr2_stream_set_callback(stream, NULL, NULL);
 127                 pvr2_stream_kill(stream);
 128                 pvr2_stream_set_buffer_count(stream, 0);
 129                 pvr2_channel_claim_stream(&adap->channel, NULL);
 130         }
 131
 132         if (adap->stream_run) {
 133                 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
 134                         if (!(adap->buffer_storage[idx])) continue;
 135                         kfree(adap->buffer_storage[idx]);
 136                         adap->buffer_storage[idx] = 0;
 137                 }
 138                 adap->stream_run = 0;
 139         }
 140 }
 141
 142 static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
 143 {
 144         struct pvr2_context *pvr = adap->channel.mc_head;
 145         unsigned int idx;
 146         int ret;
 147         struct pvr2_buffer *bp;
 148         struct pvr2_stream *stream = 0;
 149
 150         if (adap->stream_run) return -EIO;
 151
 152         ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream);
 153         /* somebody else already has the stream */
 154         if (ret < 0) return ret;
 155
 156         stream = adap->channel.stream->stream;
 157
 158         for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
 159                 adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE,
 160                                                     GFP_KERNEL);
 161                 if (!(adap->buffer_storage[idx])) return -ENOMEM;
 162         }
 163
 164         pvr2_stream_set_callback(pvr->video_stream.stream,
 165                                  (pvr2_stream_callback) pvr2_dvb_notify, adap);
 166
 167         ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
 168         if (ret < 0) return ret;
 169
 170         for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
 171                 bp = pvr2_stream_get_buffer(stream, idx);
 172                 pvr2_buffer_set_buffer(bp,
 173                                        adap->buffer_storage[idx],
 174                                        PVR2_DVB_BUFFER_SIZE);
 175         }
 176
 177         ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
 178         if (ret < 0) return ret;
 179
 180         while ((bp = pvr2_stream_get_idle_buffer(stream)) != 0) {
 181                 ret = pvr2_buffer_queue(bp);
 182                 if (ret < 0) return ret;
 183         }
 184
 185         adap->feed_thread_stop = 0;
 186         adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb");
 187
 188         if (IS_ERR(adap->thread)) {
 189                 ret = PTR_ERR(adap->thread);
 190                 adap->thread = NULL;
 191                 return ret;
 192         }
 193
 194         adap->stream_run = !0;
 195
 196         return 0;
 197 }
 198
 199 static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap)
 200 {
 201         int ret = pvr2_dvb_stream_do_start(adap);
 202         if (ret < 0) pvr2_dvb_stream_end(adap);
 203         return ret;
 204 }
 205
 206 static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
 207 {
 208         struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
 209         int ret = 0;
 210
 211         if (adap == NULL) return -ENODEV;
 212
 213         mutex_lock(&adap->lock);
 214         do {
 215                 if (onoff) {
 216                         if (!adap->feedcount) {
 217                                 printk(KERN_DEBUG "start feeding\n");
 218                                 ret = pvr2_dvb_stream_start(adap);
 219                                 if (ret < 0) break;
 220                         }
 221                         (adap->feedcount)++;
 222                 } else if (adap->feedcount > 0) {
 223                         (adap->feedcount)--;
 224                         if (!adap->feedcount) {
 225                                 printk(KERN_DEBUG "stop feeding\n");
 226                                 pvr2_dvb_stream_end(adap);
 227                         }
 228                 }
 229         } while (0);
 230         mutex_unlock(&adap->lock);
 231
 232         return ret;
 233 }
 234
 235 static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 236 {
 237         printk(KERN_DEBUG "start pid: 0x%04x, feedtype: %d\n",
 238                dvbdmxfeed->pid, dvbdmxfeed->type);
 239         return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1);
 240 }
 241
 242 static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 243 {
 244         printk(KERN_DEBUG "stop pid: 0x%04x, feedtype: %d\n",
 245                dvbdmxfeed->pid, dvbdmxfeed->type);
 246         return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0);
 247 }
 248
 249 static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 250 {
 251         /* TO DO: This function will call into the core and request for
 252          * input to be set to 'dtv' if (acquire) and if it isn't set already.
 253          *
 254          * If (!acquire) then we should do nothing -- don't switch inputs
 255          * again unless the analog side of the driver requests the bus.
 256          */
 257         return 0;
 258 }
 259
 260 static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
 261 {
 262         int ret;
 263
 264         ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
 265                                    THIS_MODULE/*&hdw->usb_dev->owner*/,
 266                                    &adap->channel.hdw->usb_dev->dev,
 267                                    adapter_nr);
 268         if (ret < 0) {
 269                 err("dvb_register_adapter failed: error %d", ret);
 270                 goto err;
 271         }
 272         adap->dvb_adap.priv = adap;
 273
 274         adap->demux.dmx.capabilities = DMX_TS_FILTERING |
 275                                        DMX_SECTION_FILTERING |
 276                                        DMX_MEMORY_BASED_FILTERING;
 277         adap->demux.priv             = adap;
 278         adap->demux.filternum        = 256;
 279         adap->demux.feednum          = 256;
 280         adap->demux.start_feed       = pvr2_dvb_start_feed;
 281         adap->demux.stop_feed        = pvr2_dvb_stop_feed;
 282         adap->demux.write_to_decoder = NULL;
 283
 284         ret = dvb_dmx_init(&adap->demux);
 285         if (ret < 0) {
 286                 err("dvb_dmx_init failed: error %d", ret);
 287                 goto err_dmx;
 288         }
 289
 290         adap->dmxdev.filternum       = adap->demux.filternum;
 291         adap->dmxdev.demux           = &adap->demux.dmx;
 292         adap->dmxdev.capabilities    = 0;
 293
 294         ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
 295         if (ret < 0) {
 296                 err("dvb_dmxdev_init failed: error %d", ret);
 297                 goto err_dmx_dev;
 298         }
 299
 300         dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
 301
 302         return 0;
 303
 304 err_dmx_dev:
 305         dvb_dmx_release(&adap->demux);
 306 err_dmx:
 307         dvb_unregister_adapter(&adap->dvb_adap);
 308 err:
 309         return ret;
 310 }
 311
 312 static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
 313 {
 314         printk(KERN_DEBUG "unregistering DVB devices\n");
 315         dvb_net_release(&adap->dvb_net);
 316         adap->demux.dmx.close(&adap->demux.dmx);
 317         dvb_dmxdev_release(&adap->dmxdev);
 318         dvb_dmx_release(&adap->demux);
 319         dvb_unregister_adapter(&adap->dvb_adap);
 320         return 0;
 321 }
 322
 323 static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
 324 {
 325         struct pvr2_hdw *hdw = adap->channel.hdw;
 326         struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;
 327         int ret;
 328
 329         if (dvb_props == NULL) {
 330                 err("fe_props not defined!");
 331                 return -EINVAL;
 332         }
 333
 334         /* FIXME: This code should be moved into the core,
 335          * and should only be called if we don't already have
 336          * control of the bus.
 337          *
 338          * We can't call "pvr2_dvb_bus_ctrl(adap->fe, 1)" from here,
 339          * because adap->fe isn't defined yet.
 340          */
 341         ret = pvr2_ctrl_set_value(pvr2_hdw_get_ctrl_by_id(hdw,
 342                                                           PVR2_CID_INPUT),
 343                                   PVR2_CVAL_INPUT_DTV);
 344         if (ret != 0)
 345                 return ret;
 346
 347         pvr2_hdw_commit_ctl(hdw);
 348
 349
 350         if (dvb_props->frontend_attach == NULL) {
 351                 err("frontend_attach not defined!");
 352                 return -EINVAL;
 353         }
 354
 355         if ((dvb_props->frontend_attach(adap) == 0) && (adap->fe)) {
 356
 357                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe)) {
 358                         err("frontend registration failed!");
 359                         dvb_frontend_detach(adap->fe);
 360                         adap->fe = NULL;
 361                         return -ENODEV;
 362                 }
 363
 364                 if (dvb_props->tuner_attach)
 365                         dvb_props->tuner_attach(adap);
 366
 367                 if (adap->fe->ops.analog_ops.standby)
 368                         adap->fe->ops.analog_ops.standby(adap->fe);
 369
 370                 /* Ensure all frontends negotiate bus access */
 371                 adap->fe->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
 372
 373         } else {
 374                 err("no frontend was attached!");
 375                 return -ENODEV;
 376         }
 377
 378         return 0;
 379 }
 380
 381 static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
 382 {
 383         if (adap->fe != NULL) {
 384                 dvb_unregister_frontend(adap->fe);
 385                 dvb_frontend_detach(adap->fe);
 386         }
 387         return 0;
 388 }
 389
 390 static void pvr2_dvb_destroy(struct pvr2_dvb_adapter *adap)
 391 {
 392         pvr2_dvb_stream_end(adap);
 393         pvr2_dvb_frontend_exit(adap);
 394         pvr2_dvb_adapter_exit(adap);
 395         pvr2_channel_done(&adap->channel);
 396         kfree(adap);
 397 }
 398
 399 static void pvr2_dvb_internal_check(struct pvr2_channel *chp)
 400 {
 401         struct pvr2_dvb_adapter *adap;
 402         adap = container_of(chp, struct pvr2_dvb_adapter, channel);
 403         if (!adap->channel.mc_head->disconnect_flag) return;
 404         pvr2_dvb_destroy(adap);
 405 }
 406
 407 struct pvr2_dvb_adapter *pvr2_dvb_create(struct pvr2_context *pvr)
 408 {
 409         int ret = 0;
 410         struct pvr2_dvb_adapter *adap;
 411         if (!pvr->hdw->hdw_desc->dvb_props) {
 412                 /* Device lacks a digital interface so don't set up
 413                    the DVB side of the driver either.  For now. */
 414                 return NULL;
 415         }
 416         adap = kzalloc(sizeof(*adap), GFP_KERNEL);
 417         if (!adap) return adap;
 418         pvr2_channel_init(&adap->channel, pvr);
 419         adap->channel.check_func = pvr2_dvb_internal_check;
 420         init_waitqueue_head(&adap->buffer_wait_data);
 421         mutex_init(&adap->lock);
 422         ret = pvr2_dvb_adapter_init(adap);
 423         if (ret < 0) goto fail1;
 424         ret = pvr2_dvb_frontend_init(adap);
 425         if (ret < 0) goto fail2;
 426         return adap;
 427
 428 fail2:
 429         pvr2_dvb_adapter_exit(adap);
 430 fail1:
 431         pvr2_channel_done(&adap->channel);
 432         return NULL;
 433 }
 434