Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  pvrusb2-dvb.c - linux-dvb api interface to the pvrusb2 driver.
 *
 *  Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>
 */
 
#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[0]) {
<------><------>if (dvb_register_frontend(&adap->dvb_adap, adap->fe[0])) {
<------><------><------>pvr2_trace(PVR2_TRACE_ERROR_LEGS,
<------><------><------><------>   "frontend registration failed!");
<------><------><------>ret = -ENODEV;
<------><------><------>goto fail_frontend0;
<------><------>}
<------><------>if (adap->fe[0]->ops.analog_ops.standby)
<------><------><------>adap->fe[0]->ops.analog_ops.standby(adap->fe[0]);
 
<------><------>pvr2_trace(PVR2_TRACE_INFO, "transferring fe[%d] ts_bus_ctrl() to pvr2_dvb_bus_ctrl()",
<------><------><------>   adap->fe[0]->id);
<------><------>adap->fe[0]->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
<------>} else {
<------><------>pvr2_trace(PVR2_TRACE_ERROR_LEGS,
<------><------><------>   "no frontend was attached!");
<------><------>ret = -ENODEV;
<------><------>return ret;
<------>}
 
<------>if (dvb_props->tuner_attach && dvb_props->tuner_attach(adap)) {
<------><------>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;
}