473 lines
12 KiB
C
473 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
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*
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* Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
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*/
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <media/dvbdev.h>
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#include "pvrusb2-debug.h"
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#include "pvrusb2-hdw-internal.h"
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#include "pvrusb2-hdw.h"
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#include "pvrusb2-io.h"
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#include "pvrusb2-dvb.h"
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DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
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{
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int ret;
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unsigned int count;
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struct pvr2_buffer *bp;
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struct pvr2_stream *stream;
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pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread started");
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set_freezable();
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stream = adap->channel.stream->stream;
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for (;;) {
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if (kthread_should_stop()) break;
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/* Not sure about this... */
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try_to_freeze();
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bp = pvr2_stream_get_ready_buffer(stream);
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if (bp != NULL) {
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count = pvr2_buffer_get_count(bp);
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if (count) {
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dvb_dmx_swfilter(
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&adap->demux,
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adap->buffer_storage[
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pvr2_buffer_get_id(bp)],
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count);
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} else {
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ret = pvr2_buffer_get_status(bp);
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if (ret < 0) break;
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}
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ret = pvr2_buffer_queue(bp);
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if (ret < 0) break;
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/* Since we know we did something to a buffer,
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just go back and try again. No point in
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blocking unless we really ran out of
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buffers to process. */
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continue;
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}
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/* Wait until more buffers become available or we're
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told not to wait any longer. */
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ret = wait_event_interruptible(
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adap->buffer_wait_data,
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(pvr2_stream_get_ready_count(stream) > 0) ||
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kthread_should_stop());
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if (ret < 0) break;
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}
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/* If we get here and ret is < 0, then an error has occurred.
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Probably would be a good idea to communicate that to DVB core... */
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pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread stopped");
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return 0;
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}
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static int pvr2_dvb_feed_thread(void *data)
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{
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int stat = pvr2_dvb_feed_func(data);
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while (!kthread_should_stop()) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule();
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}
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return stat;
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}
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static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap)
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{
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wake_up(&adap->buffer_wait_data);
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}
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static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap)
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{
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unsigned int idx;
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struct pvr2_stream *stream;
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if (adap->thread) {
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kthread_stop(adap->thread);
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adap->thread = NULL;
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}
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if (adap->channel.stream) {
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stream = adap->channel.stream->stream;
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} else {
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stream = NULL;
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}
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if (stream) {
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pvr2_hdw_set_streaming(adap->channel.hdw, 0);
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pvr2_stream_set_callback(stream, NULL, NULL);
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pvr2_stream_kill(stream);
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pvr2_stream_set_buffer_count(stream, 0);
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pvr2_channel_claim_stream(&adap->channel, NULL);
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}
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if (adap->stream_run) {
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for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
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if (!(adap->buffer_storage[idx])) continue;
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kfree(adap->buffer_storage[idx]);
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adap->buffer_storage[idx] = NULL;
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}
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adap->stream_run = 0;
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}
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}
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static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
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{
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struct pvr2_context *pvr = adap->channel.mc_head;
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unsigned int idx;
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int ret;
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struct pvr2_buffer *bp;
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struct pvr2_stream *stream = NULL;
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if (adap->stream_run) return -EIO;
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ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream);
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/* somebody else already has the stream */
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if (ret < 0) return ret;
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stream = adap->channel.stream->stream;
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for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
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adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE,
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GFP_KERNEL);
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if (!(adap->buffer_storage[idx])) return -ENOMEM;
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}
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pvr2_stream_set_callback(pvr->video_stream.stream,
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(pvr2_stream_callback) pvr2_dvb_notify, adap);
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ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
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if (ret < 0) return ret;
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for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
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bp = pvr2_stream_get_buffer(stream, idx);
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pvr2_buffer_set_buffer(bp,
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adap->buffer_storage[idx],
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PVR2_DVB_BUFFER_SIZE);
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}
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ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
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if (ret < 0) return ret;
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while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) {
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ret = pvr2_buffer_queue(bp);
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if (ret < 0) return ret;
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}
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adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb");
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if (IS_ERR(adap->thread)) {
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ret = PTR_ERR(adap->thread);
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adap->thread = NULL;
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return ret;
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}
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adap->stream_run = !0;
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return 0;
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}
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static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap)
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{
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int ret = pvr2_dvb_stream_do_start(adap);
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if (ret < 0) pvr2_dvb_stream_end(adap);
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return ret;
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}
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static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
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{
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struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
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int ret = 0;
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if (adap == NULL) return -ENODEV;
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mutex_lock(&adap->lock);
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do {
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if (onoff) {
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if (!adap->feedcount) {
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pvr2_trace(PVR2_TRACE_DVB_FEED,
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"start feeding demux");
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ret = pvr2_dvb_stream_start(adap);
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if (ret < 0) break;
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}
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(adap->feedcount)++;
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} else if (adap->feedcount > 0) {
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(adap->feedcount)--;
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if (!adap->feedcount) {
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pvr2_trace(PVR2_TRACE_DVB_FEED,
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"stop feeding demux");
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pvr2_dvb_stream_end(adap);
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}
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}
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} while (0);
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mutex_unlock(&adap->lock);
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return ret;
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}
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static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
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{
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pvr2_trace(PVR2_TRACE_DVB_FEED, "start pid: 0x%04x", dvbdmxfeed->pid);
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return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1);
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}
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static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
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{
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pvr2_trace(PVR2_TRACE_DVB_FEED, "stop pid: 0x%04x", dvbdmxfeed->pid);
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return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0);
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}
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static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
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{
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struct pvr2_dvb_adapter *adap = fe->dvb->priv;
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return pvr2_channel_limit_inputs(
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&adap->channel,
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(acquire ? (1 << PVR2_CVAL_INPUT_DTV) : 0));
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}
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static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
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{
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int ret;
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ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
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THIS_MODULE/*&hdw->usb_dev->owner*/,
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&adap->channel.hdw->usb_dev->dev,
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adapter_nr);
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if (ret < 0) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"dvb_register_adapter failed: error %d", ret);
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goto err;
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}
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adap->dvb_adap.priv = adap;
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adap->demux.dmx.capabilities = DMX_TS_FILTERING |
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DMX_SECTION_FILTERING |
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DMX_MEMORY_BASED_FILTERING;
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adap->demux.priv = adap;
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adap->demux.filternum = 256;
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adap->demux.feednum = 256;
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adap->demux.start_feed = pvr2_dvb_start_feed;
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adap->demux.stop_feed = pvr2_dvb_stop_feed;
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adap->demux.write_to_decoder = NULL;
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ret = dvb_dmx_init(&adap->demux);
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if (ret < 0) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"dvb_dmx_init failed: error %d", ret);
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goto err_dmx;
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}
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adap->dmxdev.filternum = adap->demux.filternum;
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adap->dmxdev.demux = &adap->demux.dmx;
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adap->dmxdev.capabilities = 0;
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ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
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if (ret < 0) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"dvb_dmxdev_init failed: error %d", ret);
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goto err_dmx_dev;
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}
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dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
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return 0;
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err_dmx_dev:
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dvb_dmx_release(&adap->demux);
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err_dmx:
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dvb_unregister_adapter(&adap->dvb_adap);
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err:
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return ret;
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}
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static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
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{
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pvr2_trace(PVR2_TRACE_INFO, "unregistering DVB devices");
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dvb_net_release(&adap->dvb_net);
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adap->demux.dmx.close(&adap->demux.dmx);
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dvb_dmxdev_release(&adap->dmxdev);
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dvb_dmx_release(&adap->demux);
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dvb_unregister_adapter(&adap->dvb_adap);
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return 0;
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}
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static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
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{
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struct pvr2_hdw *hdw = adap->channel.hdw;
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const struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;
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int ret = 0;
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if (dvb_props == NULL) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS, "fe_props not defined!");
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return -EINVAL;
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}
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ret = pvr2_channel_limit_inputs(
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&adap->channel,
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(1 << PVR2_CVAL_INPUT_DTV));
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if (ret) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"failed to grab control of dtv input (code=%d)",
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ret);
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return ret;
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}
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if (dvb_props->frontend_attach == NULL) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"frontend_attach not defined!");
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ret = -EINVAL;
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goto done;
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}
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if (dvb_props->frontend_attach(adap) == 0 && adap->fe[0]) {
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if (dvb_register_frontend(&adap->dvb_adap, adap->fe[0])) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"frontend registration failed!");
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ret = -ENODEV;
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goto fail_frontend0;
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}
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if (adap->fe[0]->ops.analog_ops.standby)
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adap->fe[0]->ops.analog_ops.standby(adap->fe[0]);
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pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()",
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adap->fe[0]->id);
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adap->fe[0]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
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} else {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"no frontend was attached!");
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ret = -ENODEV;
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return ret;
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}
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if (dvb_props->tuner_attach && dvb_props->tuner_attach(adap)) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS, "tuner attach failed");
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto fail_tuner;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (adap->fe[1]) {
|
||
|
|
adap->fe[1]->id = 1;
|
||
|
|
adap->fe[1]->tuner_priv = adap->fe[0]->tuner_priv;
|
||
|
|
memcpy(&adap->fe[1]->ops.tuner_ops,
|
||
|
|
&adap->fe[0]->ops.tuner_ops,
|
||
|
|
sizeof(struct dvb_tuner_ops));
|
||
|
|
|
||
|
|
if (dvb_register_frontend(&adap->dvb_adap, adap->fe[1])) {
|
||
|
|
pvr2_trace(PVR2_TRACE_ERROR_LEGS,
|
||
|
|
"frontend registration failed!");
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto fail_frontend1;
|
||
|
|
}
|
||
|
|
/* MFE lock */
|
||
|
|
adap->dvb_adap.mfe_shared = 1;
|
||
|
|
|
||
|
|
if (adap->fe[1]->ops.analog_ops.standby)
|
||
|
|
adap->fe[1]->ops.analog_ops.standby(adap->fe[1]);
|
||
|
|
|
||
|
|
pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()",
|
||
|
|
adap->fe[1]->id);
|
||
|
|
adap->fe[1]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
|
||
|
|
}
|
||
|
|
done:
|
||
|
|
pvr2_channel_limit_inputs(&adap->channel, 0);
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
fail_frontend1:
|
||
|
|
dvb_frontend_detach(adap->fe[1]);
|
||
|
|
adap->fe[1] = NULL;
|
||
|
|
fail_tuner:
|
||
|
|
dvb_unregister_frontend(adap->fe[0]);
|
||
|
|
fail_frontend0:
|
||
|
|
dvb_frontend_detach(adap->fe[0]);
|
||
|
|
adap->fe[0] = NULL;
|
||
|
|
dvb_module_release(adap->i2c_client_tuner);
|
||
|
|
dvb_module_release(adap->i2c_client_demod[1]);
|
||
|
|
dvb_module_release(adap->i2c_client_demod[0]);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
|
||
|
|
{
|
||
|
|
if (adap->fe[1]) {
|
||
|
|
dvb_unregister_frontend(adap->fe[1]);
|
||
|
|
dvb_frontend_detach(adap->fe[1]);
|
||
|
|
adap->fe[1] = NULL;
|
||
|
|
}
|
||
|
|
if (adap->fe[0]) {
|
||
|
|
dvb_unregister_frontend(adap->fe[0]);
|
||
|
|
dvb_frontend_detach(adap->fe[0]);
|
||
|
|
adap->fe[0] = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
dvb_module_release(adap->i2c_client_tuner);
|
||
|
|
adap->i2c_client_tuner = NULL;
|
||
|
|
dvb_module_release(adap->i2c_client_demod[1]);
|
||
|
|
adap->i2c_client_demod[1] = NULL;
|
||
|
|
dvb_module_release(adap->i2c_client_demod[0]);
|
||
|
|
adap->i2c_client_demod[0] = NULL;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void pvr2_dvb_destroy(struct pvr2_dvb_adapter *adap)
|
||
|
|
{
|
||
|
|
pvr2_dvb_stream_end(adap);
|
||
|
|
pvr2_dvb_frontend_exit(adap);
|
||
|
|
pvr2_dvb_adapter_exit(adap);
|
||
|
|
pvr2_channel_done(&adap->channel);
|
||
|
|
kfree(adap);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void pvr2_dvb_internal_check(struct pvr2_channel *chp)
|
||
|
|
{
|
||
|
|
struct pvr2_dvb_adapter *adap;
|
||
|
|
adap = container_of(chp, struct pvr2_dvb_adapter, channel);
|
||
|
|
if (!adap->channel.mc_head->disconnect_flag) return;
|
||
|
|
pvr2_dvb_destroy(adap);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct pvr2_dvb_adapter *pvr2_dvb_create(struct pvr2_context *pvr)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
struct pvr2_dvb_adapter *adap;
|
||
|
|
if (!pvr->hdw->hdw_desc->dvb_props) {
|
||
|
|
/* Device lacks a digital interface so don't set up
|
||
|
|
the DVB side of the driver either. For now. */
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
adap = kzalloc(sizeof(*adap), GFP_KERNEL);
|
||
|
|
if (!adap) return adap;
|
||
|
|
pvr2_channel_init(&adap->channel, pvr);
|
||
|
|
adap->channel.check_func = pvr2_dvb_internal_check;
|
||
|
|
init_waitqueue_head(&adap->buffer_wait_data);
|
||
|
|
mutex_init(&adap->lock);
|
||
|
|
ret = pvr2_dvb_adapter_init(adap);
|
||
|
|
if (ret < 0) goto fail1;
|
||
|
|
ret = pvr2_dvb_frontend_init(adap);
|
||
|
|
if (ret < 0) goto fail2;
|
||
|
|
return adap;
|
||
|
|
|
||
|
|
fail2:
|
||
|
|
pvr2_dvb_adapter_exit(adap);
|
||
|
|
fail1:
|
||
|
|
pvr2_channel_done(&adap->channel);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|