Pileus Git - ~andy/linux/blob - drivers/staging/media/as102/as102_drv.c

   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
  34 int as102_debug;
  35 module_param_named(debug, as102_debug, int, 0644);
  36 MODULE_PARM_DESC(debug, "Turn on/off debugging (default: off)");
  37
  38 int dual_tuner;
  39 module_param_named(dual_tuner, dual_tuner, int, 0644);
  40 MODULE_PARM_DESC(dual_tuner, "Activate Dual-Tuner config (default: off)");
  41
  42 static int fw_upload = 1;
  43 module_param_named(fw_upload, fw_upload, int, 0644);
  44 MODULE_PARM_DESC(fw_upload, "Turn on/off default FW upload (default: on)");
  45
  46 static int pid_filtering;
  47 module_param_named(pid_filtering, pid_filtering, int, 0644);
  48 MODULE_PARM_DESC(pid_filtering, "Activate HW PID filtering (default: off)");
  49
  50 static int ts_auto_disable;
  51 module_param_named(ts_auto_disable, ts_auto_disable, int, 0644);
  52 MODULE_PARM_DESC(ts_auto_disable, "Stream Auto Enable on FW (default: off)");
  53
  54 int elna_enable = 1;
  55 module_param_named(elna_enable, elna_enable, int, 0644);
  56 MODULE_PARM_DESC(elna_enable, "Activate eLNA (default: on)");
  57
  58 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  59
  60 static 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
  83 static 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
 108 static 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         ENTER();
 115
 116         if (mutex_lock_interruptible(&dev->bus_adap.lock)) {
 117                 dprintk(debug, "mutex_lock_interruptible(lock) failed !\n");
 118                 return -EBUSY;
 119         }
 120
 121         switch (onoff) {
 122         case 0:
 123                 ret = as10x_cmd_del_PID_filter(bus_adap, (uint16_t) pid);
 124                 dprintk(debug, "DEL_PID_FILTER([%02d] 0x%04x) ret = %d\n",
 125                         index, pid, ret);
 126                 break;
 127         case 1:
 128         {
 129                 struct as10x_ts_filter filter;
 130
 131                 filter.type = TS_PID_TYPE_TS;
 132                 filter.idx = 0xFF;
 133                 filter.pid = pid;
 134
 135                 ret = as10x_cmd_add_PID_filter(bus_adap, &filter);
 136                 dprintk(debug, "ADD_PID_FILTER([%02d -> %02d], 0x%04x) ret = %d\n",
 137                         index, filter.idx, filter.pid, ret);
 138                 break;
 139         }
 140         }
 141
 142         mutex_unlock(&dev->bus_adap.lock);
 143
 144         LEAVE();
 145         return ret;
 146 }
 147
 148 static int as102_dvb_dmx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 149 {
 150         int ret = 0;
 151         struct dvb_demux *demux = dvbdmxfeed->demux;
 152         struct as102_dev_t *as102_dev = demux->priv;
 153
 154         ENTER();
 155
 156         if (mutex_lock_interruptible(&as102_dev->sem))
 157                 return -ERESTARTSYS;
 158
 159         if (pid_filtering)
 160                 as10x_pid_filter(as102_dev, dvbdmxfeed->index,
 161                                  dvbdmxfeed->pid, 1);
 162
 163         if (as102_dev->streaming++ == 0)
 164                 ret = as102_start_stream(as102_dev);
 165
 166         mutex_unlock(&as102_dev->sem);
 167         LEAVE();
 168         return ret;
 169 }
 170
 171 static int as102_dvb_dmx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 172 {
 173         struct dvb_demux *demux = dvbdmxfeed->demux;
 174         struct as102_dev_t *as102_dev = demux->priv;
 175
 176         ENTER();
 177
 178         if (mutex_lock_interruptible(&as102_dev->sem))
 179                 return -ERESTARTSYS;
 180
 181         if (--as102_dev->streaming == 0)
 182                 as102_stop_stream(as102_dev);
 183
 184         if (pid_filtering)
 185                 as10x_pid_filter(as102_dev, dvbdmxfeed->index,
 186                                  dvbdmxfeed->pid, 0);
 187
 188         mutex_unlock(&as102_dev->sem);
 189         LEAVE();
 190         return 0;
 191 }
 192
 193 int as102_dvb_register(struct as102_dev_t *as102_dev)
 194 {
 195         struct device *dev = &as102_dev->bus_adap.usb_dev->dev;
 196         int ret;
 197
 198         ret = dvb_register_adapter(&as102_dev->dvb_adap,
 199                            as102_dev->name, THIS_MODULE,
 200                            dev, adapter_nr);
 201         if (ret < 0) {
 202                 dev_err(dev, "%s: dvb_register_adapter() failed: %d\n",
 203                         __func__, ret);
 204                 return ret;
 205         }
 206
 207         as102_dev->dvb_dmx.priv = as102_dev;
 208         as102_dev->dvb_dmx.filternum = pid_filtering ? 16 : 256;
 209         as102_dev->dvb_dmx.feednum = 256;
 210         as102_dev->dvb_dmx.start_feed = as102_dvb_dmx_start_feed;
 211         as102_dev->dvb_dmx.stop_feed = as102_dvb_dmx_stop_feed;
 212
 213         as102_dev->dvb_dmx.dmx.capabilities = DMX_TS_FILTERING |
 214                                               DMX_SECTION_FILTERING;
 215
 216         as102_dev->dvb_dmxdev.filternum = as102_dev->dvb_dmx.filternum;
 217         as102_dev->dvb_dmxdev.demux = &as102_dev->dvb_dmx.dmx;
 218         as102_dev->dvb_dmxdev.capabilities = 0;
 219
 220         ret = dvb_dmx_init(&as102_dev->dvb_dmx);
 221         if (ret < 0) {
 222                 dev_err(dev, "%s: dvb_dmx_init() failed: %d\n", __func__, ret);
 223                 goto edmxinit;
 224         }
 225
 226         ret = dvb_dmxdev_init(&as102_dev->dvb_dmxdev, &as102_dev->dvb_adap);
 227         if (ret < 0) {
 228                 dev_err(dev, "%s: dvb_dmxdev_init() failed: %d\n",
 229                         __func__, ret);
 230                 goto edmxdinit;
 231         }
 232
 233         ret = as102_dvb_register_fe(as102_dev, &as102_dev->dvb_fe);
 234         if (ret < 0) {
 235                 dev_err(dev, "%s: as102_dvb_register_frontend() failed: %d",
 236                     __func__, ret);
 237                 goto efereg;
 238         }
 239
 240         /* init bus mutex for token locking */
 241         mutex_init(&as102_dev->bus_adap.lock);
 242
 243         /* init start / stop stream mutex */
 244         mutex_init(&as102_dev->sem);
 245
 246         /*
 247          * try to load as102 firmware. If firmware upload failed, we'll be
 248          * able to upload it later.
 249          */
 250         if (fw_upload)
 251                 try_then_request_module(as102_fw_upload(&as102_dev->bus_adap),
 252                                 "firmware_class");
 253
 254         pr_info("Registered device %s", as102_dev->name);
 255         return 0;
 256
 257 efereg:
 258         dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
 259 edmxdinit:
 260         dvb_dmx_release(&as102_dev->dvb_dmx);
 261 edmxinit:
 262         dvb_unregister_adapter(&as102_dev->dvb_adap);
 263         return ret;
 264 }
 265
 266 void as102_dvb_unregister(struct as102_dev_t *as102_dev)
 267 {
 268         /* unregister as102 frontend */
 269         as102_dvb_unregister_fe(&as102_dev->dvb_fe);
 270
 271         /* unregister demux device */
 272         dvb_dmxdev_release(&as102_dev->dvb_dmxdev);
 273         dvb_dmx_release(&as102_dev->dvb_dmx);
 274
 275         /* unregister dvb adapter */
 276         dvb_unregister_adapter(&as102_dev->dvb_adap);
 277
 278         pr_info("Unregistered device %s", as102_dev->name);
 279 }
 280
 281 module_usb_driver(as102_usb_driver);
 282
 283 /* modinfo details */
 284 MODULE_DESCRIPTION(DRIVER_FULL_NAME);
 285 MODULE_LICENSE("GPL");
 286 MODULE_AUTHOR("Pierrick Hascoet <pierrick.hascoet@abilis.com>");