drivers/media/dvb/dibusb/dvb-dibusb-dvb.c

   1 /*
   2  * dvb-dibusb-dvb.c is part of the driver for mobile USB Budget DVB-T devices
   3  * based on reference design made by DiBcom (http://www.dibcom.fr/)
   4  *
   5  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
   6  *
   7  * see dvb-dibusb-core.c for more copyright details.
   8  *
   9  * This file contains functions for initializing and handling the
  10  * linux-dvb API.
  11  */
  12 #include "dvb-dibusb.h"
  13
  14 #include <linux/usb.h>
  15 #include <linux/version.h>
  16
  17 static u32 urb_compl_count;
  18
  19 /*
  20  * MPEG2 TS DVB stuff
  21  */
  22 void dibusb_urb_complete(struct urb *urb, struct pt_regs *ptregs)
  23 {
  24         struct usb_dibusb *dib = urb->context;
  25
  26         deb_ts("urb complete feedcount: %d, status: %d, length: %d\n",dib->feedcount,urb->status,
  27                         urb->actual_length);
  28
  29         urb_compl_count++;
  30         if (urb_compl_count % 1000 == 0)
  31                 deb_info("%d urbs completed so far.\n",urb_compl_count);
  32
  33         switch (urb->status) {
  34                 case 0:         /* success */
  35                 case -ETIMEDOUT:    /* NAK */
  36                         break;
  37                 case -ECONNRESET:   /* kill */
  38                 case -ENOENT:
  39                 case -ESHUTDOWN:
  40                         return;
  41                 default:        /* error */
  42                         deb_ts("urb completition error %d.", urb->status);
  43                         break;
  44         }
  45
  46         if (dib->feedcount > 0 && urb->actual_length > 0) {
  47                 if (dib->init_state & DIBUSB_STATE_DVB)
  48                         dvb_dmx_swfilter(&dib->demux, (u8*) urb->transfer_buffer,urb->actual_length);
  49         } else
  50                 deb_ts("URB dropped because of feedcount.\n");
  51
  52         usb_submit_urb(urb,GFP_ATOMIC);
  53 }
  54
  55 static int dibusb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
  56 {
  57         struct usb_dibusb *dib = dvbdmxfeed->demux->priv;
  58         int newfeedcount;
  59
  60         if (dib == NULL)
  61                 return -ENODEV;
  62
  63         newfeedcount = dib->feedcount + (onoff ? 1 : -1);
  64
  65         /*
  66          * stop feed before setting a new pid if there will be no pid anymore
  67          */
  68         if (newfeedcount == 0) {
  69                 deb_ts("stop feeding\n");
  70                 if (dib->xfer_ops.fifo_ctrl != NULL) {
  71                         if (dib->xfer_ops.fifo_ctrl(dib->fe,0)) {
  72                                 err("error while inhibiting fifo.");
  73                                 return -ENODEV;
  74                         }
  75                 }
  76                 dibusb_streaming(dib,0);
  77         }
  78
  79         dib->feedcount = newfeedcount;
  80
  81         /* activate the pid on the device specific pid_filter */
  82         deb_ts("setting pid: %5d %04x at index %d '%s'\n",dvbdmxfeed->pid,dvbdmxfeed->pid,dvbdmxfeed->index,onoff ? "on" : "off");
  83         if (dib->pid_parse && dib->xfer_ops.pid_ctrl != NULL)
  84                 dib->xfer_ops.pid_ctrl(dib->fe,dvbdmxfeed->index,dvbdmxfeed->pid,onoff);
  85
  86         /*
  87          * start the feed if this was the first pid to set and there is still a pid
  88          * for reception.
  89          */
  90         if (dib->feedcount == onoff && dib->feedcount > 0) {
  91
  92                 deb_ts("controlling pid parser\n");
  93                 if (dib->xfer_ops.pid_parse != NULL) {
  94                         if (dib->xfer_ops.pid_parse(dib->fe,dib->pid_parse) < 0) {
  95                                 err("could not handle pid_parser");
  96                         }
  97                 }
  98
  99                 deb_ts("start feeding\n");
 100                 if (dib->xfer_ops.fifo_ctrl != NULL) {
 101                         if (dib->xfer_ops.fifo_ctrl(dib->fe,1)) {
 102                                 err("error while enabling fifo.");
 103                                 return -ENODEV;
 104                         }
 105                 }
 106                 dibusb_streaming(dib,1);
 107         }
 108         return 0;
 109 }
 110
 111 static int dibusb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
 112 {
 113         deb_ts("start pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid,dvbdmxfeed->type);
 114         return dibusb_ctrl_feed(dvbdmxfeed,1);
 115 }
 116
 117 static int dibusb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 118 {
 119         deb_ts("stop pid: 0x%04x, feedtype: %d\n", dvbdmxfeed->pid, dvbdmxfeed->type);
 120         return dibusb_ctrl_feed(dvbdmxfeed,0);
 121 }
 122
 123 int dibusb_dvb_init(struct usb_dibusb *dib)
 124 {
 125         int ret;
 126
 127         urb_compl_count = 0;
 128
 129         if ((ret = dvb_register_adapter(&dib->adapter, DRIVER_DESC,
 130                         THIS_MODULE)) < 0) {
 131                 deb_info("dvb_register_adapter failed: error %d", ret);
 132                 goto err;
 133         }
 134         dib->adapter.priv = dib;
 135
 136 /* i2c is done in dibusb_i2c_init */
 137
 138         dib->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
 139
 140         dib->demux.priv = (void *)dib;
 141         /* get pidcount from demod */
 142         dib->demux.feednum = dib->demux.filternum = 255;
 143         dib->demux.start_feed = dibusb_start_feed;
 144         dib->demux.stop_feed = dibusb_stop_feed;
 145         dib->demux.write_to_decoder = NULL;
 146         if ((ret = dvb_dmx_init(&dib->demux)) < 0) {
 147                 err("dvb_dmx_init failed: error %d",ret);
 148                 goto err_dmx;
 149         }
 150
 151         dib->dmxdev.filternum = dib->demux.filternum;
 152         dib->dmxdev.demux = &dib->demux.dmx;
 153         dib->dmxdev.capabilities = 0;
 154         if ((ret = dvb_dmxdev_init(&dib->dmxdev, &dib->adapter)) < 0) {
 155                 err("dvb_dmxdev_init failed: error %d",ret);
 156                 goto err_dmx_dev;
 157         }
 158
 159         dvb_net_init(&dib->adapter, &dib->dvb_net, &dib->demux.dmx);
 160
 161         goto success;
 162 err_dmx_dev:
 163         dvb_dmx_release(&dib->demux);
 164 err_dmx:
 165         dvb_unregister_adapter(&dib->adapter);
 166 err:
 167         return ret;
 168 success:
 169         dib->init_state |= DIBUSB_STATE_DVB;
 170         return 0;
 171 }
 172
 173 int dibusb_dvb_exit(struct usb_dibusb *dib)
 174 {
 175         if (dib->init_state & DIBUSB_STATE_DVB) {
 176                 dib->init_state &= ~DIBUSB_STATE_DVB;
 177                 deb_info("unregistering DVB part\n");
 178                 dvb_net_release(&dib->dvb_net);
 179                 dib->demux.dmx.close(&dib->demux.dmx);
 180                 dvb_dmxdev_release(&dib->dmxdev);
 181                 dvb_dmx_release(&dib->demux);
 182                 dvb_unregister_adapter(&dib->adapter);
 183         }
 184         return 0;
 185 }