drivers/media/usb/dvb-usb/dvb-usb-dvb.c

   1 /* dvb-usb-dvb.c is part of the DVB USB library.
   2  *
   3  * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
   4  * see dvb-usb-init.c for copyright information.
   5  *
   6  * This file contains functions for initializing and handling the
   7  * linux-dvb API.
   8  */
   9 #include "dvb-usb-common.h"
  10
  11 /* does the complete input transfer handling */
  12 static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
  13 {
  14         struct dvb_usb_adapter *adap = dvbdmxfeed->demux->priv;
  15         int newfeedcount, ret;
  16
  17         if (adap == NULL)
  18                 return -ENODEV;
  19
  20         if ((adap->active_fe < 0) ||
  21             (adap->active_fe >= adap->num_frontends_initialized)) {
  22                 return -EINVAL;
  23         }
  24
  25         newfeedcount = adap->feedcount + (onoff ? 1 : -1);
  26
  27         /* stop feed before setting a new pid if there will be no pid anymore */
  28         if (newfeedcount == 0) {
  29                 deb_ts("stop feeding\n");
  30                 usb_urb_kill(&adap->fe_adap[adap->active_fe].stream);
  31
  32                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  33                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 0);
  34                         if (ret < 0) {
  35                                 err("error while stopping stream.");
  36                                 return ret;
  37                         }
  38                 }
  39         }
  40
  41         adap->feedcount = newfeedcount;
  42
  43         /* activate the pid on the device specific pid_filter */
  44         deb_ts("setting pid (%s): %5d %04x at index %d '%s'\n",
  45                 adap->fe_adap[adap->active_fe].pid_filtering ?
  46                 "yes" : "no", dvbdmxfeed->pid, dvbdmxfeed->pid,
  47                 dvbdmxfeed->index, onoff ? "on" : "off");
  48         if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  49                 adap->fe_adap[adap->active_fe].pid_filtering &&
  50                 adap->props.fe[adap->active_fe].pid_filter != NULL)
  51                 adap->props.fe[adap->active_fe].pid_filter(adap, dvbdmxfeed->index, dvbdmxfeed->pid, onoff);
  52
  53         /* start the feed if this was the first feed and there is still a feed
  54          * for reception.
  55          */
  56         if (adap->feedcount == onoff && adap->feedcount > 0) {
  57                 deb_ts("submitting all URBs\n");
  58                 usb_urb_submit(&adap->fe_adap[adap->active_fe].stream);
  59
  60                 deb_ts("controlling pid parser\n");
  61                 if (adap->props.fe[adap->active_fe].caps & DVB_USB_ADAP_HAS_PID_FILTER &&
  62                         adap->props.fe[adap->active_fe].caps &
  63                         DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF &&
  64                         adap->props.fe[adap->active_fe].pid_filter_ctrl != NULL) {
  65                         ret = adap->props.fe[adap->active_fe].pid_filter_ctrl(adap,
  66                                 adap->fe_adap[adap->active_fe].pid_filtering);
  67                         if (ret < 0) {
  68                                 err("could not handle pid_parser");
  69                                 return ret;
  70                         }
  71                 }
  72                 deb_ts("start feeding\n");
  73                 if (adap->props.fe[adap->active_fe].streaming_ctrl != NULL) {
  74                         ret = adap->props.fe[adap->active_fe].streaming_ctrl(adap, 1);
  75                         if (ret < 0) {
  76                                 err("error while enabling fifo.");
  77                                 return ret;
  78                         }
  79                 }
  80
  81         }
  82         return 0;
  83 }
  84
  85 static int dvb_usb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  86 {
  87         deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
  88         return dvb_usb_ctrl_feed(dvbdmxfeed,1);
  89 }
  90
  91 static int dvb_usb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  92 {
  93         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
  94         return dvb_usb_ctrl_feed(dvbdmxfeed,0);
  95 }
  96
  97 int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap, short *adapter_nums)
  98 {
  99         int i;
 100         int ret = dvb_register_adapter(&adap->dvb_adap, adap->dev->desc->name,
 101                                        adap->dev->owner, &adap->dev->udev->dev,
 102                                        adapter_nums);
 103
 104         if (ret < 0) {
 105                 deb_info("dvb_register_adapter failed: error %d", ret);
 106                 goto err;
 107         }
 108         adap->dvb_adap.priv = adap;
 109
 110         if (adap->dev->props.read_mac_address) {
 111                 if (adap->dev->props.read_mac_address(adap->dev,adap->dvb_adap.proposed_mac) == 0)
 112                         info("MAC address: %pM",adap->dvb_adap.proposed_mac);
 113                 else
 114                         err("MAC address reading failed.");
 115         }
 116
 117
 118         adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 119         adap->demux.priv             = adap;
 120
 121         adap->demux.filternum        = 0;
 122         for (i = 0; i < adap->props.num_frontends; i++) {
 123                 if (adap->demux.filternum < adap->fe_adap[i].max_feed_count)
 124                         adap->demux.filternum = adap->fe_adap[i].max_feed_count;
 125         }
 126         adap->demux.feednum          = adap->demux.filternum;
 127         adap->demux.start_feed       = dvb_usb_start_feed;
 128         adap->demux.stop_feed        = dvb_usb_stop_feed;
 129         adap->demux.write_to_decoder = NULL;
 130         if ((ret = dvb_dmx_init(&adap->demux)) < 0) {
 131                 err("dvb_dmx_init failed: error %d",ret);
 132                 goto err_dmx;
 133         }
 134
 135         adap->dmxdev.filternum       = adap->demux.filternum;
 136         adap->dmxdev.demux           = &adap->demux.dmx;
 137         adap->dmxdev.capabilities    = 0;
 138         if ((ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap)) < 0) {
 139                 err("dvb_dmxdev_init failed: error %d",ret);
 140                 goto err_dmx_dev;
 141         }
 142
 143         if ((ret = dvb_net_init(&adap->dvb_adap, &adap->dvb_net,
 144                                                 &adap->demux.dmx)) < 0) {
 145                 err("dvb_net_init failed: error %d",ret);
 146                 goto err_net_init;
 147         }
 148
 149         adap->state |= DVB_USB_ADAP_STATE_DVB;
 150         return 0;
 151
 152 err_net_init:
 153         dvb_dmxdev_release(&adap->dmxdev);
 154 err_dmx_dev:
 155         dvb_dmx_release(&adap->demux);
 156 err_dmx:
 157         dvb_unregister_adapter(&adap->dvb_adap);
 158 err:
 159         return ret;
 160 }
 161
 162 int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap)
 163 {
 164         if (adap->state & DVB_USB_ADAP_STATE_DVB) {
 165                 deb_info("unregistering DVB part\n");
 166                 dvb_net_release(&adap->dvb_net);
 167                 adap->demux.dmx.close(&adap->demux.dmx);
 168                 dvb_dmxdev_release(&adap->dmxdev);
 169                 dvb_dmx_release(&adap->demux);
 170                 dvb_unregister_adapter(&adap->dvb_adap);
 171                 adap->state &= ~DVB_USB_ADAP_STATE_DVB;
 172         }
 173         return 0;
 174 }
 175
 176 static int dvb_usb_set_active_fe(struct dvb_frontend *fe, int onoff)
 177 {
 178         struct dvb_usb_adapter *adap = fe->dvb->priv;
 179
 180         int ret = (adap->props.frontend_ctrl) ?
 181                 adap->props.frontend_ctrl(fe, onoff) : 0;
 182
 183         if (ret < 0) {
 184                 err("frontend_ctrl request failed");
 185                 return ret;
 186         }
 187         if (onoff)
 188                 adap->active_fe = fe->id;
 189
 190         return 0;
 191 }
 192
 193 static int dvb_usb_fe_wakeup(struct dvb_frontend *fe)
 194 {
 195         struct dvb_usb_adapter *adap = fe->dvb->priv;
 196
 197         dvb_usb_device_power_ctrl(adap->dev, 1);
 198
 199         dvb_usb_set_active_fe(fe, 1);
 200
 201         if (adap->fe_adap[fe->id].fe_init)
 202                 adap->fe_adap[fe->id].fe_init(fe);
 203
 204         return 0;
 205 }
 206
 207 static int dvb_usb_fe_sleep(struct dvb_frontend *fe)
 208 {
 209         struct dvb_usb_adapter *adap = fe->dvb->priv;
 210
 211         if (adap->fe_adap[fe->id].fe_sleep)
 212                 adap->fe_adap[fe->id].fe_sleep(fe);
 213
 214         dvb_usb_set_active_fe(fe, 0);
 215
 216         return dvb_usb_device_power_ctrl(adap->dev, 0);
 217 }
 218
 219 int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap)
 220 {
 221         int ret, i;
 222
 223         /* register all given adapter frontends */
 224         for (i = 0; i < adap->props.num_frontends; i++) {
 225
 226                 if (adap->props.fe[i].frontend_attach == NULL) {
 227                         err("strange: '%s' #%d,%d "
 228                             "doesn't want to attach a frontend.",
 229                             adap->dev->desc->name, adap->id, i);
 230
 231                         return 0;
 232                 }
 233
 234                 ret = adap->props.fe[i].frontend_attach(adap);
 235                 if (ret || adap->fe_adap[i].fe == NULL) {
 236                         /* only print error when there is no FE at all */
 237                         if (i == 0)
 238                                 err("no frontend was attached by '%s'",
 239                                         adap->dev->desc->name);
 240
 241                         return 0;
 242                 }
 243
 244                 adap->fe_adap[i].fe->id = i;
 245
 246                 /* re-assign sleep and wakeup functions */
 247                 adap->fe_adap[i].fe_init = adap->fe_adap[i].fe->ops.init;
 248                 adap->fe_adap[i].fe->ops.init  = dvb_usb_fe_wakeup;
 249                 adap->fe_adap[i].fe_sleep = adap->fe_adap[i].fe->ops.sleep;
 250                 adap->fe_adap[i].fe->ops.sleep = dvb_usb_fe_sleep;
 251
 252                 if (dvb_register_frontend(&adap->dvb_adap, adap->fe_adap[i].fe)) {
 253                         err("Frontend %d registration failed.", i);
 254                         dvb_frontend_detach(adap->fe_adap[i].fe);
 255                         adap->fe_adap[i].fe = NULL;
 256                         /* In error case, do not try register more FEs,
 257                          * still leaving already registered FEs alive. */
 258                         if (i == 0)
 259                                 return -ENODEV;
 260                         else
 261                                 return 0;
 262                 }
 263
 264                 /* only attach the tuner if the demod is there */
 265                 if (adap->props.fe[i].tuner_attach != NULL)
 266                         adap->props.fe[i].tuner_attach(adap);
 267
 268                 adap->num_frontends_initialized++;
 269         }
 270
 271         return 0;
 272 }
 273
 274 int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap)
 275 {
 276         int i = adap->num_frontends_initialized - 1;
 277
 278         /* unregister all given adapter frontends */
 279         for (; i >= 0; i--) {
 280                 if (adap->fe_adap[i].fe != NULL) {
 281                         dvb_unregister_frontend(adap->fe_adap[i].fe);
 282                         dvb_frontend_detach(adap->fe_adap[i].fe);
 283                 }
 284         }
 285         adap->num_frontends_initialized = 0;
 286
 287         return 0;
 288 }