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path: root/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
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Diffstat (limited to 'drivers/media/usb/pvrusb2/pvrusb2-dvb.c')
-rw-r--r--drivers/media/usb/pvrusb2/pvrusb2-dvb.c431
1 files changed, 431 insertions, 0 deletions
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
new file mode 100644
index 000000000..4b32b2141
--- /dev/null
+++ b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
@@ -0,0 +1,431 @@
+/*
+ * pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
+ *
+ * Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <media/dvbdev.h>
+#include "pvrusb2-debug.h"
+#include "pvrusb2-hdw-internal.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2-io.h"
+#include "pvrusb2-dvb.h"
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
+{
+ int ret;
+ unsigned int count;
+ struct pvr2_buffer *bp;
+ struct pvr2_stream *stream;
+
+ pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread started");
+ set_freezable();
+
+ stream = adap->channel.stream->stream;
+
+ for (;;) {
+ if (kthread_should_stop()) break;
+
+ /* Not sure about this... */
+ try_to_freeze();
+
+ bp = pvr2_stream_get_ready_buffer(stream);
+ if (bp != NULL) {
+ count = pvr2_buffer_get_count(bp);
+ if (count) {
+ dvb_dmx_swfilter(
+ &adap->demux,
+ adap->buffer_storage[
+ pvr2_buffer_get_id(bp)],
+ count);
+ } else {
+ ret = pvr2_buffer_get_status(bp);
+ if (ret < 0) break;
+ }
+ ret = pvr2_buffer_queue(bp);
+ if (ret < 0) break;
+
+ /* Since we know we did something to a buffer,
+ just go back and try again. No point in
+ blocking unless we really ran out of
+ buffers to process. */
+ continue;
+ }
+
+
+ /* Wait until more buffers become available or we're
+ told not to wait any longer. */
+ ret = wait_event_interruptible(
+ adap->buffer_wait_data,
+ (pvr2_stream_get_ready_count(stream) > 0) ||
+ kthread_should_stop());
+ if (ret < 0) break;
+ }
+
+ /* If we get here and ret is < 0, then an error has occurred.
+ Probably would be a good idea to communicate that to DVB core... */
+
+ pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread stopped");
+
+ return 0;
+}
+
+static int pvr2_dvb_feed_thread(void *data)
+{
+ int stat = pvr2_dvb_feed_func(data);
+ /* from videobuf-dvb.c: */
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ return stat;
+}
+
+static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap)
+{
+ wake_up(&adap->buffer_wait_data);
+}
+
+static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap)
+{
+ unsigned int idx;
+ struct pvr2_stream *stream;
+
+ if (adap->thread) {
+ kthread_stop(adap->thread);
+ adap->thread = NULL;
+ }
+
+ if (adap->channel.stream) {
+ stream = adap->channel.stream->stream;
+ } else {
+ stream = NULL;
+ }
+ if (stream) {
+ pvr2_hdw_set_streaming(adap->channel.hdw, 0);
+ pvr2_stream_set_callback(stream, NULL, NULL);
+ pvr2_stream_kill(stream);
+ pvr2_stream_set_buffer_count(stream, 0);
+ pvr2_channel_claim_stream(&adap->channel, NULL);
+ }
+
+ if (adap->stream_run) {
+ for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
+ if (!(adap->buffer_storage[idx])) continue;
+ kfree(adap->buffer_storage[idx]);
+ adap->buffer_storage[idx] = NULL;
+ }
+ adap->stream_run = 0;
+ }
+}
+
+static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
+{
+ struct pvr2_context *pvr = adap->channel.mc_head;
+ unsigned int idx;
+ int ret;
+ struct pvr2_buffer *bp;
+ struct pvr2_stream *stream = NULL;
+
+ if (adap->stream_run) return -EIO;
+
+ ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream);
+ /* somebody else already has the stream */
+ if (ret < 0) return ret;
+
+ stream = adap->channel.stream->stream;
+
+ for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
+ adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE,
+ GFP_KERNEL);
+ if (!(adap->buffer_storage[idx])) return -ENOMEM;
+ }
+
+ pvr2_stream_set_callback(pvr->video_stream.stream,
+ (pvr2_stream_callback) pvr2_dvb_notify, adap);
+
+ ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
+ if (ret < 0) return ret;
+
+ for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
+ bp = pvr2_stream_get_buffer(stream, idx);
+ pvr2_buffer_set_buffer(bp,
+ adap->buffer_storage[idx],
+ PVR2_DVB_BUFFER_SIZE);
+ }
+
+ ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
+ if (ret < 0) return ret;
+
+ while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) {
+ ret = pvr2_buffer_queue(bp);
+ if (ret < 0) return ret;
+ }
+
+ adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb");
+
+ if (IS_ERR(adap->thread)) {
+ ret = PTR_ERR(adap->thread);
+ adap->thread = NULL;
+ return ret;
+ }
+
+ adap->stream_run = !0;
+
+ return 0;
+}
+
+static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap)
+{
+ int ret = pvr2_dvb_stream_do_start(adap);
+ if (ret < 0) pvr2_dvb_stream_end(adap);
+ return ret;
+}
+
+static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
+{
+ struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
+ int ret = 0;
+
+ if (adap == NULL) return -ENODEV;
+
+ mutex_lock(&adap->lock);
+ do {
+ if (onoff) {
+ if (!adap->feedcount) {
+ pvr2_trace(PVR2_TRACE_DVB_FEED,
+ "start feeding demux");
+ ret = pvr2_dvb_stream_start(adap);
+ if (ret < 0) break;
+ }
+ (adap->feedcount)++;
+ } else if (adap->feedcount > 0) {
+ (adap->feedcount)--;
+ if (!adap->feedcount) {
+ pvr2_trace(PVR2_TRACE_DVB_FEED,
+ "stop feeding demux");
+ pvr2_dvb_stream_end(adap);
+ }
+ }
+ } while (0);
+ mutex_unlock(&adap->lock);
+
+ return ret;
+}
+
+static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+ pvr2_trace(PVR2_TRACE_DVB_FEED, "start pid: 0x%04x", dvbdmxfeed->pid);
+ return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1);
+}
+
+static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
+{
+ pvr2_trace(PVR2_TRACE_DVB_FEED, "stop pid: 0x%04x", dvbdmxfeed->pid);
+ return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0);
+}
+
+static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
+{
+ struct pvr2_dvb_adapter *adap = fe->dvb->priv;
+ return pvr2_channel_limit_inputs(
+ &adap->channel,
+ (acquire ? (1 << PVR2_CVAL_INPUT_DTV) : 0));
+}
+
+static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
+{
+ int ret;
+
+ ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
+ THIS_MODULE/*&hdw->usb_dev->owner*/,
+ &adap->channel.hdw->usb_dev->dev,
+ adapter_nr);
+ if (ret < 0) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "dvb_register_adapter failed: error %d", ret);
+ goto err;
+ }
+ adap->dvb_adap.priv = adap;
+
+ adap->demux.dmx.capabilities = DMX_TS_FILTERING |
+ DMX_SECTION_FILTERING |
+ DMX_MEMORY_BASED_FILTERING;
+ adap->demux.priv = adap;
+ adap->demux.filternum = 256;
+ adap->demux.feednum = 256;
+ adap->demux.start_feed = pvr2_dvb_start_feed;
+ adap->demux.stop_feed = pvr2_dvb_stop_feed;
+ adap->demux.write_to_decoder = NULL;
+
+ ret = dvb_dmx_init(&adap->demux);
+ if (ret < 0) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "dvb_dmx_init failed: error %d", ret);
+ goto err_dmx;
+ }
+
+ adap->dmxdev.filternum = adap->demux.filternum;
+ adap->dmxdev.demux = &adap->demux.dmx;
+ adap->dmxdev.capabilities = 0;
+
+ ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
+ if (ret < 0) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "dvb_dmxdev_init failed: error %d", ret);
+ goto err_dmx_dev;
+ }
+
+ dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
+
+ return 0;
+
+err_dmx_dev:
+ dvb_dmx_release(&adap->demux);
+err_dmx:
+ dvb_unregister_adapter(&adap->dvb_adap);
+err:
+ return ret;
+}
+
+static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
+{
+ pvr2_trace(PVR2_TRACE_INFO, "unregistering DVB devices");
+ dvb_net_release(&adap->dvb_net);
+ adap->demux.dmx.close(&adap->demux.dmx);
+ dvb_dmxdev_release(&adap->dmxdev);
+ dvb_dmx_release(&adap->demux);
+ dvb_unregister_adapter(&adap->dvb_adap);
+ return 0;
+}
+
+static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
+{
+ struct pvr2_hdw *hdw = adap->channel.hdw;
+ const struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;
+ int ret = 0;
+
+ if (dvb_props == NULL) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS, "fe_props not defined!");
+ return -EINVAL;
+ }
+
+ ret = pvr2_channel_limit_inputs(
+ &adap->channel,
+ (1 << PVR2_CVAL_INPUT_DTV));
+ if (ret) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "failed to grab control of dtv input (code=%d)",
+ ret);
+ return ret;
+ }
+
+ if (dvb_props->frontend_attach == NULL) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "frontend_attach not defined!");
+ ret = -EINVAL;
+ goto done;
+ }
+
+ if ((dvb_props->frontend_attach(adap) == 0) && (adap->fe)) {
+
+ if (dvb_register_frontend(&adap->dvb_adap, adap->fe)) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "frontend registration failed!");
+ dvb_frontend_detach(adap->fe);
+ adap->fe = NULL;
+ ret = -ENODEV;
+ goto done;
+ }
+
+ if (dvb_props->tuner_attach)
+ dvb_props->tuner_attach(adap);
+
+ if (adap->fe->ops.analog_ops.standby)
+ adap->fe->ops.analog_ops.standby(adap->fe);
+
+ /* Ensure all frontends negotiate bus access */
+ adap->fe->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
+
+ } else {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "no frontend was attached!");
+ ret = -ENODEV;
+ return ret;
+ }
+
+ done:
+ pvr2_channel_limit_inputs(&adap->channel, 0);
+ return ret;
+}
+
+static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
+{
+ if (adap->fe != NULL) {
+ dvb_unregister_frontend(adap->fe);
+ dvb_frontend_detach(adap->fe);
+ }
+ 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;
+}
+
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