LXR linux/drivers/staging/media/as102/as102

   1/*
   2 * Abilis Systems Single DVB-T Receiver
   3 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
   4 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2, or (at your option)
   9 * any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20#include <linux/kernel.h>
  21#include <linux/errno.h>
  22#include <linux/slab.h>
  23#include <linux/module.h>
  24#include <linux/mm.h>
  25#include <linux/kref.h>
  26#include <linux/uaccess.h>
  27#include <linux/usb.h>
  28
  29/* header file for usb device driver*/
  30#include "as102_drv.h"
  31#include "as102_fw.h"
  32#include "dvbdev.h"
  33
  34int as102_debug;
  35module_param_named(debug, as102_debug, int, 0644);
  36MODULE_PARM_DESC(debug, "Turn on/off debugging (default: off)");
  37
  38int dual_tuner;
  39module_param_named(dual_tuner, dual_tuner, int, 0644);
  40MODULE_PARM_DESC(dual_tuner, "Activate Dual-Tuner config (default: off)");
  41
  42static int fw_upload = 1;
  43module_param_named(fw_upload, fw_upload, int, 0644);
  44MODULE_PARM_DESC(fw_upload, "Turn on/off default FW upload (default: on)");
  45
  46static int pid_filtering;
  47module_param_named(pid_filtering, pid_filtering, int, 0644);
  48MODULE_PARM_DESC(pid_filtering, "Activate HW PID filtering (default: off)");
  49
  50static int ts_auto_disable;
  51module_param_named(ts_auto_disable, ts_auto_disable, int, 0644);
  52MODULE_PARM_DESC(ts_auto_disable, "Stream Auto Enable on FW (default: off)");
  53
  54int elna_enable = 1;
  55module_param_named(elna_enable, elna_enable, int, 0644);
  56MODULE_PARM_DESC(elna_enable, "Activate eLNA (default: on)");
  57
  58DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  59
  60static void as102_stop_stream(struct as102_dev_t *dev)
  61{
  62        struct as10x_bus_adapter_t *bus_adap;
  63
  64        if (dev != NULL)
  65                bus_adap = &dev->bus_adap;
  66        else
  67                return;
  68
  69        if (bus_adap->ops->stop_stream != NULL)
  70                bus_adap->ops->stop_stream(dev);
  71
  72        if (ts_auto_disable) {
  73                if (mutex_lock_interruptible(&dev->bus_adap.lock))
  74                        return;
  75
  76                if (as10x_cmd_stop_streaming(bus_adap) < 0)
  77                        dprintk(debug, "as10x_cmd_stop_streaming failed\n");
  78
  79                mutex_unlock(&dev->bus_adap.lock);
  80        }
  81}
  82
  83static int as102_start_stream(struct as102_dev_t *dev)
  84{
  85        struct as10x_bus_adapter_t *bus_adap;
  86        int ret = -EFAULT;
  87
  88        if (dev != NULL)
  89                bus_adap = &dev->bus_adap;
  90        else
  91                return ret;
  92
  93        if (bus_adap->ops->start_stream != NULL)
  94                ret = bus_adap->ops->start_stream(dev);
  95
  96        if (ts_auto_disable) {
  97                if (mutex_lock_interruptible(&dev->bus_adap.lock))
  98                        return -EFAULT;
  99
 100                ret = as10x_cmd_start_streaming(bus_adap);
 101
 102                mutex_unlock(&dev->bus_adap.lock);
 103        }
 104
 105        return ret;
 106}
 107
 108static int as10x_pid_filter(struct as102_dev_t *dev,
 109                            int index, u16 pid, int onoff) {
 110
 111        struct as10x_bus_adapter_t *bus_adap = &dev->bus_adap;
 112        int ret = -EFAULT;
 113
 114        if (mutex_lock_interruptible(&dev->bus_adap.lock)) {
 115                dprintk(debug, "mutex_lock_interruptible(lock) failed !\n");
 116                return -EBUSY;
 117        }
 118
 119        switch (onoff) {
 120        case 0:
 121                ret = as10x_cmd_del_PID_filter(bus_adap, (uint16_t) pid);
 122                dprintk(debug, "DEL_PID_FILTER([%02d] 0x%04x) ret = %d\n",
 123                        index, pid, ret);
 124                break;
 125        case 1:
 126        {
 127                struct as10x_ts_filter filter;
 128
 129                filter.type = TS_PID_TYPE_TS;
 130                filter.idx = 0xFF;
 131                filter.pid = pid;
 132
 133                ret = as10x_cmd_add_PID_filter(bus_adap, &filter);
 134                dprintk(debug,
 135                        "ADD_PID_FILTER([%02d -> %02d], 0x%04x) ret = %d\n",
 136                        index, filter.idx, filter.pid, ret);
 137                break;
 138        }
 139        }
 140
 141        mutex_unlock(&dev->bus_adap.lock);
 142        return ret;
 143}
 144
 145static int as102_dvb_dmx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 146{
 147        int ret = 0;
 148        struct dvb_demux *demux = dvbdmxfeed->demux;
 149        struct as102_dev_t *as102_dev = demux->priv;
 150
 151        if (mutex_lock_interruptible(&as102_dev->sem))
 152                return -ERESTARTSYS;
 153
 154        if (pid_filtering)
 155                as10x_pid_filter(as102_dev, dvbdmxfeed->index,
 156                                 dvbdmxfeed->pid, 1);
 157
 158        if (as102_dev->streaming++ == 0)
 159                ret = as102_start_stream(as102_dev);
 160
 161        mutex_unlock(&as102_dev->sem);
 162        return ret;
 163}
 164
 165static int as102_dvb_dmx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 166{
 167        struct dvb_demux *demux = dvbdmxfeed->demux;
 168        struct as102_dev_t *as102_dev = demux->priv;
 169
 170        if (mutex_lock_interruptible(&as102_dev->sem))
 171                return -ERESTARTSYS;
 172
 173        if (--as102_dev->streaming == 0)
 174                as102_stop_stream(as102_dev);
 175
 176        if (pid_filtering)
 177                as10x_pid_filter(as102_dev, dvbdmxfeed->index,
 178                                 dvbdmxfeed->pid, 0);
 179
 180        mutex_unlock(&as102_dev->sem);
 181        return 0;
 182}
 183
 184int as102_dvb_register(struct as102_dev_t *as102_dev)
 185{
 186        struct device *dev = &as102_dev->bus_adap.usb_dev->dev;
 187        int ret;
 188
 189        ret = dvb_register_adapter(&as102_dev->dvb_adap,
 190                           as102_dev->name, THIS_MODULE,
 191                           dev, adapter_nr);
 192        if (ret < 0) {
 193                dev_err(dev, "%s: dvb_register_adapter() failed: %d\n",
 194                        __func__, ret);
 195                return ret;
 196        }
 197
 198        as102_dev->dvb_dmx.priv = as102_dev;
 199        as102_dev->dvb_dmx.filternum = pid_filtering ? 16 : 256;
 200        as102_dev->dvb_dmx.feednum = 256;
 201        as102_dev->dvb_dmx.start_feed = as102_dvb_dmx_start_feed;
 202        as102_dev->dvb_dmx.stop_feed = as102_dvb_dmx_stop_feed;
 203
 204        as102_dev->dvb_dmx.dmx.capabilities = DMX_TS_FILTERING |
 205                                              DMX_SECTION_FILTERING;
 206
 207        as102_dev->dvb_dmxdev.filternum = as102_dev->dvb_dmx.filternum;
 208        as102_dev->dvb_dmxdev.demux = &as102_dev->dvb_dmx.dmx;
 209        as102_dev->dvb_dmxdev.capabilities = 0;
 210
 211        ret = dvb_dmx_init(&as102_dev->dvb_dmx);
 212        if (ret < 0) {
 213                dev_err(dev, "%s: dvb_dmx_init() failed: %d\n", __func__, ret);
 214                goto edmxinit;
 215        }
 216
 217        ret = dvb_dmxdev_init(&as102_dev->dvb_dmxdev, &as102_dev->dvb_adap);
 218        if (ret < 0) {
 219                dev_err(dev, "%s: dvb_dmxdev_init() failed: %d\n",
 220                        __func__, ret);
 221                goto edmxdinit;
 222        }
 223
 224        ret = as102_dvb_register_fe(as102_dev, &as102_dev->dvb_fe);
 225        if (ret < 0) {
 226                dev_err(dev, "%s: as102_dvb_register_frontend() failed: %d",
 227                    __func__, ret);
 228                goto efereg;
 229        }
 230
 231        /* init bus mutex for token locking */
 232        mutex_init(&as102_dev->bus_adap.lock);
 233
 234        /* init start / stop stream mutex */
 235        mutex_init(&as102_dev->sem);
 236
 237        /*
 238         * try to load as102 firmware. If firmware upload failed, we'll be
 239         * able to upload it later.
 240         */
 241        if (fw_upload)
 242                try_then_request_module(as102_fw_upload(&as102_dev->bus_adap),
 243                                "firmware_class");
 244
 245        pr_info("Registered device %s", as102_dev->name);
 246        return 0;
 247
 248efereg:
 249        dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
 250edmxdinit:
 251        dvb_dmx_release(&as102_dev->dvb_dmx);
 252edmxinit:
 253        dvb_unregister_adapter(&as102_dev->dvb_adap);
 254        return ret;
 255}
 256
 257void as102_dvb_unregister(struct as102_dev_t *as102_dev)
 258{
 259        /* unregister as102 frontend */
 260        as102_dvb_unregister_fe(&as102_dev->dvb_fe);
 261
 262        /* unregister demux device */
 263        dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
 264        dvb_dmx_release(&as102_dev->dvb_dmx);
 265
 266        /* unregister dvb adapter */
 267        dvb_unregister_adapter(&as102_dev->dvb_adap);
 268
 269        pr_info("Unregistered device %s", as102_dev->name);
 270}
 271
 272module_usb_driver(as102_usb_driver);
 273
 274/* modinfo details */
 275MODULE_DESCRIPTION(DRIVER_FULL_NAME);
 276MODULE_LICENSE("GPL");
 277MODULE_AUTHOR("Pierrick Hascoet <pierrick.hascoet@abilis.com>");
 278