Added missing tegra files.HEADmaster

1 files changed, 435 insertions, 0 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-dvb.c b/drivers/media/video/pvrusb2/pvrusb2-dvb.c
new file mode 100644
index 00000000000..8c95793433e
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-dvb.c
@@ -0,0 +1,435 @@
+/*
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <linux/kthread.h>
+#include <linux/freezer.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include "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;
+}
+