Quelle  as102_drv.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Abilis Systems Single DVB-T Receiver
 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
 */
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/kref.h>
#include <linux/uaccess.h>
#include <linux/usb.h>

/* header file for usb device driver*/
#include "as102_drv.h"
#include "as10x_cmd.h"
#include "as102_fe.h"
#include "as102_fw.h"
#include <media/dvbdev.h>

int dual_tuner;
module_param_named(dual_tuner, dual_tuner, int, 0644);
MODULE_PARM_DESC(dual_tuner, "Activate Dual-Tuner config (default: off)");

static int fw_upload = 1;
module_param_named(fw_upload, fw_upload, int, 0644);
MODULE_PARM_DESC(fw_upload, "Turn on/off default FW upload (default: on)");

static int pid_filtering;
module_param_named(pid_filtering, pid_filtering, int, 0644);
MODULE_PARM_DESC(pid_filtering, "Activate HW PID filtering (default: off)");

static int ts_auto_disable;
module_param_named(ts_auto_disable, ts_auto_disable, int, 0644);
MODULE_PARM_DESC(ts_auto_disable, "Stream Auto Enable on FW (default: off)");

int elna_enable = 1;
module_param_named(elna_enable, elna_enable, int, 0644);
MODULE_PARM_DESC(elna_enable, "Activate eLNA (default: on)");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static void as102_stop_stream(struct as102_dev_t *dev)
{
 struct as10x_bus_adapter_t *bus_adap;

 if (dev != NULL)
  bus_adap = &dev->bus_adap;
 else
  return;

 if (bus_adap->ops->stop_stream != NULL)
  bus_adap->ops->stop_stream(dev);

 if (ts_auto_disable) {
  if (mutex_lock_interruptible(&dev->bus_adap.lock))
   return;

  if (as10x_cmd_stop_streaming(bus_adap) < 0)
   dev_dbg(&dev->bus_adap.usb_dev->dev,
    "as10x_cmd_stop_streaming failed\n");

  mutex_unlock(&dev->bus_adap.lock);
 }
}

static int as102_start_stream(struct as102_dev_t *dev)
{
 struct as10x_bus_adapter_t *bus_adap;
 int ret = -EFAULT;

 if (dev != NULL)
  bus_adap = &dev->bus_adap;
 else
  return ret;

 if (bus_adap->ops->start_stream != NULL)
  ret = bus_adap->ops->start_stream(dev);

 if (ts_auto_disable) {
  if (mutex_lock_interruptible(&dev->bus_adap.lock))
   return -EFAULT;

  ret = as10x_cmd_start_streaming(bus_adap);

  mutex_unlock(&dev->bus_adap.lock);
 }

 return ret;
}

static int as10x_pid_filter(struct as102_dev_t *dev,
       int index, u16 pid, int onoff) {

 struct as10x_bus_adapter_t *bus_adap = &dev->bus_adap;
 int ret = -EFAULT;

 if (mutex_lock_interruptible(&dev->bus_adap.lock)) {
  dev_dbg(&dev->bus_adap.usb_dev->dev,
   "amutex_lock_interruptible(lock) failed !\n");
  return -EBUSY;
 }

 switch (onoff) {
 case 0:
  ret = as10x_cmd_del_PID_filter(bus_adap, (uint16_t) pid);
  dev_dbg(&dev->bus_adap.usb_dev->dev,
   "DEL_PID_FILTER([%02d] 0x%04x) ret = %d\n",
   index, pid, ret);
  break;
 case 1:
 {
  struct as10x_ts_filter filter;

  filter.type = TS_PID_TYPE_TS;
  filter.idx = 0xFF;
  filter.pid = pid;

  ret = as10x_cmd_add_PID_filter(bus_adap, &filter);
  dev_dbg(&dev->bus_adap.usb_dev->dev,
   "ADD_PID_FILTER([%02d -> %02d], 0x%04x) ret = %d\n",
   index, filter.idx, filter.pid, ret);
  break;
 }
 }

 mutex_unlock(&dev->bus_adap.lock);
 return ret;
}

static int as102_dvb_dmx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
 int ret = 0;
 struct dvb_demux *demux = dvbdmxfeed->demux;
 struct as102_dev_t *as102_dev = demux->priv;

 if (mutex_lock_interruptible(&as102_dev->sem))
  return -ERESTARTSYS;

 if (pid_filtering)
  as10x_pid_filter(as102_dev, dvbdmxfeed->index,
     dvbdmxfeed->pid, 1);

 if (as102_dev->streaming++ == 0)
  ret = as102_start_stream(as102_dev);

 mutex_unlock(&as102_dev->sem);
 return ret;
}

static int as102_dvb_dmx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
 struct dvb_demux *demux = dvbdmxfeed->demux;
 struct as102_dev_t *as102_dev = demux->priv;

 if (mutex_lock_interruptible(&as102_dev->sem))
  return -ERESTARTSYS;

 if (--as102_dev->streaming == 0)
  as102_stop_stream(as102_dev);

 if (pid_filtering)
  as10x_pid_filter(as102_dev, dvbdmxfeed->index,
     dvbdmxfeed->pid, 0);

 mutex_unlock(&as102_dev->sem);
 return 0;
}

static int as102_set_tune(void *priv, struct as10x_tune_args *tune_args)
{
 struct as10x_bus_adapter_t *bus_adap = priv;
 int ret;

 /* Set frontend arguments */
 if (mutex_lock_interruptible(&bus_adap->lock))
  return -EBUSY;

 ret =  as10x_cmd_set_tune(bus_adap, tune_args);
 if (ret != 0)
  dev_dbg(&bus_adap->usb_dev->dev,
   "as10x_cmd_set_tune failed. (err = %d)\n", ret);

 mutex_unlock(&bus_adap->lock);

 return ret;
}

static int as102_get_tps(void *priv, struct as10x_tps *tps)
{
 struct as10x_bus_adapter_t *bus_adap = priv;
 int ret;

 if (mutex_lock_interruptible(&bus_adap->lock))
  return -EBUSY;

 /* send abilis command: GET_TPS */
 ret = as10x_cmd_get_tps(bus_adap, tps);

 mutex_unlock(&bus_adap->lock);

 return ret;
}

static int as102_get_status(void *priv, struct as10x_tune_status *tstate)
{
 struct as10x_bus_adapter_t *bus_adap = priv;
 int ret;

 if (mutex_lock_interruptible(&bus_adap->lock))
  return -EBUSY;

 /* send abilis command: GET_TUNE_STATUS */
 ret = as10x_cmd_get_tune_status(bus_adap, tstate);
 if (ret < 0) {
  dev_dbg(&bus_adap->usb_dev->dev,
   "as10x_cmd_get_tune_status failed (err = %d)\n",
   ret);
 }

 mutex_unlock(&bus_adap->lock);

 return ret;
}

static int as102_get_stats(void *priv, struct as10x_demod_stats *demod_stats)
{
 struct as10x_bus_adapter_t *bus_adap = priv;
 int ret;

 if (mutex_lock_interruptible(&bus_adap->lock))
  return -EBUSY;

 /* send abilis command: GET_TUNE_STATUS */
 ret = as10x_cmd_get_demod_stats(bus_adap, demod_stats);
 if (ret < 0) {
  dev_dbg(&bus_adap->usb_dev->dev,
   "as10x_cmd_get_demod_stats failed (probably not tuned)\n");
 } else {
  dev_dbg(&bus_adap->usb_dev->dev,
   "demod status: fc: 0x%08x, bad fc: 0x%08x, bytes corrected: 0x%08x , MER: 0x%04x\n",
   demod_stats->frame_count,
   demod_stats->bad_frame_count,
   demod_stats->bytes_fixed_by_rs,
   demod_stats->mer);
 }
 mutex_unlock(&bus_adap->lock);

 return ret;
}

static int as102_stream_ctrl(void *priv, int acquire, uint32_t elna_cfg)
{
 struct as10x_bus_adapter_t *bus_adap = priv;
 int ret;

 if (mutex_lock_interruptible(&bus_adap->lock))
  return -EBUSY;

 if (acquire) {
  if (elna_enable)
   as10x_cmd_set_context(bus_adap,
           CONTEXT_LNA, elna_cfg);

  ret = as10x_cmd_turn_on(bus_adap);
 } else {
  ret = as10x_cmd_turn_off(bus_adap);
 }

 mutex_unlock(&bus_adap->lock);

 return ret;
}

static const struct as102_fe_ops as102_fe_ops = {
 .set_tune = as102_set_tune,
 .get_tps  = as102_get_tps,
 .get_status = as102_get_status,
 .get_stats = as102_get_stats,
 .stream_ctrl = as102_stream_ctrl,
};

int as102_dvb_register(struct as102_dev_t *as102_dev)
{
 struct device *dev = &as102_dev->bus_adap.usb_dev->dev;
 int ret;

 ret = dvb_register_adapter(&as102_dev->dvb_adap,
      as102_dev->name, THIS_MODULE,
      dev, adapter_nr);
 if (ret < 0) {
  dev_err(dev, "%s: dvb_register_adapter() failed: %d\n",
   __func__, ret);
  return ret;
 }

 as102_dev->dvb_dmx.priv = as102_dev;
 as102_dev->dvb_dmx.filternum = pid_filtering ? 16 : 256;
 as102_dev->dvb_dmx.feednum = 256;
 as102_dev->dvb_dmx.start_feed = as102_dvb_dmx_start_feed;
 as102_dev->dvb_dmx.stop_feed = as102_dvb_dmx_stop_feed;

 as102_dev->dvb_dmx.dmx.capabilities = DMX_TS_FILTERING |
           DMX_SECTION_FILTERING;

 as102_dev->dvb_dmxdev.filternum = as102_dev->dvb_dmx.filternum;
 as102_dev->dvb_dmxdev.demux = &as102_dev->dvb_dmx.dmx;
 as102_dev->dvb_dmxdev.capabilities = 0;

 ret = dvb_dmx_init(&as102_dev->dvb_dmx);
 if (ret < 0) {
  dev_err(dev, "%s: dvb_dmx_init() failed: %d\n", __func__, ret);
  goto edmxinit;
 }

 ret = dvb_dmxdev_init(&as102_dev->dvb_dmxdev, &as102_dev->dvb_adap);
 if (ret < 0) {
  dev_err(dev, "%s: dvb_dmxdev_init() failed: %d\n",
   __func__, ret);
  goto edmxdinit;
 }

 /* Attach the frontend */
 as102_dev->dvb_fe = dvb_attach(as102_attach, as102_dev->name,
           &as102_fe_ops,
           &as102_dev->bus_adap,
           as102_dev->elna_cfg);
 if (!as102_dev->dvb_fe) {
  ret = -ENODEV;
  dev_err(dev, "%s: as102_attach() failed: %d",
      __func__, ret);
  goto efereg;
 }

 ret =  dvb_register_frontend(&as102_dev->dvb_adap, as102_dev->dvb_fe);
 if (ret < 0) {
  dev_err(dev, "%s: as102_dvb_register_frontend() failed: %d",
      __func__, ret);
  goto efereg;
 }

 /* init bus mutex for token locking */
 mutex_init(&as102_dev->bus_adap.lock);

 /* init start / stop stream mutex */
 mutex_init(&as102_dev->sem);

 /*
 * try to load as102 firmware. If firmware upload failed, we'll be
 * able to upload it later.
 */
 if (fw_upload)
  try_then_request_module(as102_fw_upload(&as102_dev->bus_adap),
    "firmware_class");

 pr_info("Registered device %s", as102_dev->name);
 return 0;

efereg:
 dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
edmxdinit:
 dvb_dmx_release(&as102_dev->dvb_dmx);
edmxinit:
 dvb_unregister_adapter(&as102_dev->dvb_adap);
 return ret;
}

void as102_dvb_unregister(struct as102_dev_t *as102_dev)
{
 /* unregister as102 frontend */
 dvb_unregister_frontend(as102_dev->dvb_fe);

 /* detach frontend */
 dvb_frontend_detach(as102_dev->dvb_fe);

 /* unregister demux device */
 dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
 dvb_dmx_release(&as102_dev->dvb_dmx);

 /* unregister dvb adapter */
 dvb_unregister_adapter(&as102_dev->dvb_adap);

 pr_info("Unregistered device %s", as102_dev->name);
}

module_usb_driver(as102_usb_driver);

/* modinfo details */
MODULE_DESCRIPTION(DRIVER_FULL_NAME);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pierrick Hascoet ");