1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver. 4 * 5 * Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org> 6 */ 7 8 #include <linux/kthread.h> 9 #include <linux/freezer.h> 10 #include <linux/slab.h> 11 #include <linux/mm.h> 12 #include <media/dvbdev.h> 13 #include "pvrusb2-debug.h" 14 #include "pvrusb2-hdw-internal.h" 15 #include "pvrusb2-hdw.h" 16 #include "pvrusb2-io.h" 17 #include "pvrusb2-dvb.h" 18 19 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr); 20 21 static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap) 22 { 23 int ret; 24 unsigned int count; 25 struct pvr2_buffer *bp; 26 struct pvr2_stream *stream; 27 28 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread started"); 29 set_freezable(); 30 31 stream = adap->channel.stream->stream; 32 33 for (;;) { 34 if (kthread_should_stop()) break; 35 36 /* Not sure about this... */ 37 try_to_freeze(); 38 39 bp = pvr2_stream_get_ready_buffer(stream); 40 if (bp != NULL) { 41 count = pvr2_buffer_get_count(bp); 42 if (count) { 43 dvb_dmx_swfilter( 44 &adap->demux, 45 adap->buffer_storage[ 46 pvr2_buffer_get_id(bp)], 47 count); 48 } else { 49 ret = pvr2_buffer_get_status(bp); 50 if (ret < 0) break; 51 } 52 ret = pvr2_buffer_queue(bp); 53 if (ret < 0) break; 54 55 /* Since we know we did something to a buffer, 56 just go back and try again. No point in 57 blocking unless we really ran out of 58 buffers to process. */ 59 continue; 60 } 61 62 63 /* Wait until more buffers become available or we're 64 told not to wait any longer. */ 65 ret = wait_event_interruptible( 66 adap->buffer_wait_data, 67 (pvr2_stream_get_ready_count(stream) > 0) || 68 kthread_should_stop()); 69 if (ret < 0) break; 70 } 71 72 /* If we get here and ret is < 0, then an error has occurred. 73 Probably would be a good idea to communicate that to DVB core... */ 74 75 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread stopped"); 76 77 return 0; 78 } 79 80 static int pvr2_dvb_feed_thread(void *data) 81 { 82 int stat = pvr2_dvb_feed_func(data); 83 /* from videobuf-dvb.c: */ 84 while (!kthread_should_stop()) { 85 set_current_state(TASK_INTERRUPTIBLE); 86 schedule(); 87 } 88 return stat; 89 } 90 91 static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap) 92 { 93 wake_up(&adap->buffer_wait_data); 94 } 95 96 static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap) 97 { 98 unsigned int idx; 99 struct pvr2_stream *stream; 100 101 if (adap->thread) { 102 kthread_stop(adap->thread); 103 adap->thread = NULL; 104 } 105 106 if (adap->channel.stream) { 107 stream = adap->channel.stream->stream; 108 } else { 109 stream = NULL; 110 } 111 if (stream) { 112 pvr2_hdw_set_streaming(adap->channel.hdw, 0); 113 pvr2_stream_set_callback(stream, NULL, NULL); 114 pvr2_stream_kill(stream); 115 pvr2_stream_set_buffer_count(stream, 0); 116 pvr2_channel_claim_stream(&adap->channel, NULL); 117 } 118 119 if (adap->stream_run) { 120 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) { 121 if (!(adap->buffer_storage[idx])) continue; 122 kfree(adap->buffer_storage[idx]); 123 adap->buffer_storage[idx] = NULL; 124 } 125 adap->stream_run = 0; 126 } 127 } 128 129 static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap) 130 { 131 struct pvr2_context *pvr = adap->channel.mc_head; 132 unsigned int idx; 133 int ret; 134 struct pvr2_buffer *bp; 135 struct pvr2_stream *stream = NULL; 136 137 if (adap->stream_run) return -EIO; 138 139 ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream); 140 /* somebody else already has the stream */ 141 if (ret < 0) return ret; 142 143 stream = adap->channel.stream->stream; 144 145 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) { 146 adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE, 147 GFP_KERNEL); 148 if (!(adap->buffer_storage[idx])) return -ENOMEM; 149 } 150 151 pvr2_stream_set_callback(pvr->video_stream.stream, 152 (pvr2_stream_callback) pvr2_dvb_notify, adap); 153 154 ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT); 155 if (ret < 0) return ret; 156 157 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) { 158 bp = pvr2_stream_get_buffer(stream, idx); 159 pvr2_buffer_set_buffer(bp, 160 adap->buffer_storage[idx], 161 PVR2_DVB_BUFFER_SIZE); 162 } 163 164 ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1); 165 if (ret < 0) return ret; 166 167 while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) { 168 ret = pvr2_buffer_queue(bp); 169 if (ret < 0) return ret; 170 } 171 172 adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb"); 173 174 if (IS_ERR(adap->thread)) { 175 ret = PTR_ERR(adap->thread); 176 adap->thread = NULL; 177 return ret; 178 } 179 180 adap->stream_run = !0; 181 182 return 0; 183 } 184 185 static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap) 186 { 187 int ret = pvr2_dvb_stream_do_start(adap); 188 if (ret < 0) pvr2_dvb_stream_end(adap); 189 return ret; 190 } 191 192 static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff) 193 { 194 struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv; 195 int ret = 0; 196 197 if (adap == NULL) return -ENODEV; 198 199 mutex_lock(&adap->lock); 200 do { 201 if (onoff) { 202 if (!adap->feedcount) { 203 pvr2_trace(PVR2_TRACE_DVB_FEED, 204 "start feeding demux"); 205 ret = pvr2_dvb_stream_start(adap); 206 if (ret < 0) break; 207 } 208 (adap->feedcount)++; 209 } else if (adap->feedcount > 0) { 210 (adap->feedcount)--; 211 if (!adap->feedcount) { 212 pvr2_trace(PVR2_TRACE_DVB_FEED, 213 "stop feeding demux"); 214 pvr2_dvb_stream_end(adap); 215 } 216 } 217 } while (0); 218 mutex_unlock(&adap->lock); 219 220 return ret; 221 } 222 223 static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed) 224 { 225 pvr2_trace(PVR2_TRACE_DVB_FEED, "start pid: 0x%04x", dvbdmxfeed->pid); 226 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1); 227 } 228 229 static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed) 230 { 231 pvr2_trace(PVR2_TRACE_DVB_FEED, "stop pid: 0x%04x", dvbdmxfeed->pid); 232 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0); 233 } 234 235 static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire) 236 { 237 struct pvr2_dvb_adapter *adap = fe->dvb->priv; 238 return pvr2_channel_limit_inputs( 239 &adap->channel, 240 (acquire ? (1 << PVR2_CVAL_INPUT_DTV) : 0)); 241 } 242 243 static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap) 244 { 245 int ret; 246 247 ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb", 248 THIS_MODULE/*&hdw->usb_dev->owner*/, 249 &adap->channel.hdw->usb_dev->dev, 250 adapter_nr); 251 if (ret < 0) { 252 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 253 "dvb_register_adapter failed: error %d", ret); 254 goto err; 255 } 256 adap->dvb_adap.priv = adap; 257 258 adap->demux.dmx.capabilities = DMX_TS_FILTERING | 259 DMX_SECTION_FILTERING | 260 DMX_MEMORY_BASED_FILTERING; 261 adap->demux.priv = adap; 262 adap->demux.filternum = 256; 263 adap->demux.feednum = 256; 264 adap->demux.start_feed = pvr2_dvb_start_feed; 265 adap->demux.stop_feed = pvr2_dvb_stop_feed; 266 adap->demux.write_to_decoder = NULL; 267 268 ret = dvb_dmx_init(&adap->demux); 269 if (ret < 0) { 270 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 271 "dvb_dmx_init failed: error %d", ret); 272 goto err_dmx; 273 } 274 275 adap->dmxdev.filternum = adap->demux.filternum; 276 adap->dmxdev.demux = &adap->demux.dmx; 277 adap->dmxdev.capabilities = 0; 278 279 ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap); 280 if (ret < 0) { 281 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 282 "dvb_dmxdev_init failed: error %d", ret); 283 goto err_dmx_dev; 284 } 285 286 dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx); 287 288 return 0; 289 290 err_dmx_dev: 291 dvb_dmx_release(&adap->demux); 292 err_dmx: 293 dvb_unregister_adapter(&adap->dvb_adap); 294 err: 295 return ret; 296 } 297 298 static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap) 299 { 300 pvr2_trace(PVR2_TRACE_INFO, "unregistering DVB devices"); 301 dvb_net_release(&adap->dvb_net); 302 adap->demux.dmx.close(&adap->demux.dmx); 303 dvb_dmxdev_release(&adap->dmxdev); 304 dvb_dmx_release(&adap->demux); 305 dvb_unregister_adapter(&adap->dvb_adap); 306 return 0; 307 } 308 309 static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap) 310 { 311 struct pvr2_hdw *hdw = adap->channel.hdw; 312 const struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props; 313 int ret = 0; 314 315 if (dvb_props == NULL) { 316 pvr2_trace(PVR2_TRACE_ERROR_LEGS, "fe_props not defined!"); 317 return -EINVAL; 318 } 319 320 ret = pvr2_channel_limit_inputs( 321 &adap->channel, 322 (1 << PVR2_CVAL_INPUT_DTV)); 323 if (ret) { 324 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 325 "failed to grab control of dtv input (code=%d)", 326 ret); 327 return ret; 328 } 329 330 if (dvb_props->frontend_attach == NULL) { 331 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 332 "frontend_attach not defined!"); 333 ret = -EINVAL; 334 goto done; 335 } 336 337 if (dvb_props->frontend_attach(adap) == 0 && adap->fe[0]) { 338 if (dvb_register_frontend(&adap->dvb_adap, adap->fe[0])) { 339 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 340 "frontend registration failed!"); 341 ret = -ENODEV; 342 goto fail_frontend0; 343 } 344 if (adap->fe[0]->ops.analog_ops.standby) 345 adap->fe[0]->ops.analog_ops.standby(adap->fe[0]); 346 347 pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()", 348 adap->fe[0]->id); 349 adap->fe[0]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl; 350 } else { 351 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 352 "no frontend was attached!"); 353 ret = -ENODEV; 354 return ret; 355 } 356 357 if (dvb_props->tuner_attach && dvb_props->tuner_attach(adap)) { 358 pvr2_trace(PVR2_TRACE_ERROR_LEGS, "tuner attach failed"); 359 ret = -ENODEV; 360 goto fail_tuner; 361 } 362 363 if (adap->fe[1]) { 364 adap->fe[1]->id = 1; 365 adap->fe[1]->tuner_priv = adap->fe[0]->tuner_priv; 366 memcpy(&adap->fe[1]->ops.tuner_ops, 367 &adap->fe[0]->ops.tuner_ops, 368 sizeof(struct dvb_tuner_ops)); 369 370 if (dvb_register_frontend(&adap->dvb_adap, adap->fe[1])) { 371 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 372 "frontend registration failed!"); 373 ret = -ENODEV; 374 goto fail_frontend1; 375 } 376 /* MFE lock */ 377 adap->dvb_adap.mfe_shared = 1; 378 379 if (adap->fe[1]->ops.analog_ops.standby) 380 adap->fe[1]->ops.analog_ops.standby(adap->fe[1]); 381 382 pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()", 383 adap->fe[1]->id); 384 adap->fe[1]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl; 385 } 386 done: 387 pvr2_channel_limit_inputs(&adap->channel, 0); 388 return ret; 389 390 fail_frontend1: 391 dvb_frontend_detach(adap->fe[1]); 392 adap->fe[1] = NULL; 393 fail_tuner: 394 dvb_unregister_frontend(adap->fe[0]); 395 fail_frontend0: 396 dvb_frontend_detach(adap->fe[0]); 397 adap->fe[0] = NULL; 398 dvb_module_release(adap->i2c_client_tuner); 399 dvb_module_release(adap->i2c_client_demod[1]); 400 dvb_module_release(adap->i2c_client_demod[0]); 401 402 return ret; 403 } 404 405 static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap) 406 { 407 if (adap->fe[1]) { 408 dvb_unregister_frontend(adap->fe[1]); 409 dvb_frontend_detach(adap->fe[1]); 410 adap->fe[1] = NULL; 411 } 412 if (adap->fe[0]) { 413 dvb_unregister_frontend(adap->fe[0]); 414 dvb_frontend_detach(adap->fe[0]); 415 adap->fe[0] = NULL; 416 } 417 418 dvb_module_release(adap->i2c_client_tuner); 419 adap->i2c_client_tuner = NULL; 420 dvb_module_release(adap->i2c_client_demod[1]); 421 adap->i2c_client_demod[1] = NULL; 422 dvb_module_release(adap->i2c_client_demod[0]); 423 adap->i2c_client_demod[0] = NULL; 424 425 return 0; 426 } 427 428 static void pvr2_dvb_destroy(struct pvr2_dvb_adapter *adap) 429 { 430 pvr2_dvb_stream_end(adap); 431 pvr2_dvb_frontend_exit(adap); 432 pvr2_dvb_adapter_exit(adap); 433 pvr2_channel_done(&adap->channel); 434 kfree(adap); 435 } 436 437 static void pvr2_dvb_internal_check(struct pvr2_channel *chp) 438 { 439 struct pvr2_dvb_adapter *adap; 440 adap = container_of(chp, struct pvr2_dvb_adapter, channel); 441 if (!adap->channel.mc_head->disconnect_flag) return; 442 pvr2_dvb_destroy(adap); 443 } 444 445 struct pvr2_dvb_adapter *pvr2_dvb_create(struct pvr2_context *pvr) 446 { 447 int ret = 0; 448 struct pvr2_dvb_adapter *adap; 449 if (!pvr->hdw->hdw_desc->dvb_props) { 450 /* Device lacks a digital interface so don't set up 451 the DVB side of the driver either. For now. */ 452 return NULL; 453 } 454 adap = kzalloc(sizeof(*adap), GFP_KERNEL); 455 if (!adap) return adap; 456 pvr2_channel_init(&adap->channel, pvr); 457 adap->channel.check_func = pvr2_dvb_internal_check; 458 init_waitqueue_head(&adap->buffer_wait_data); 459 mutex_init(&adap->lock); 460 ret = pvr2_dvb_adapter_init(adap); 461 if (ret < 0) goto fail1; 462 ret = pvr2_dvb_frontend_init(adap); 463 if (ret < 0) goto fail2; 464 return adap; 465 466 fail2: 467 pvr2_dvb_adapter_exit(adap); 468 fail1: 469 pvr2_channel_done(&adap->channel); 470 return NULL; 471 } 472 473