drivers/media/dvb/ngene/ngene-dvb.c

   1 /*
   2  * ngene-dvb.c: nGene PCIe bridge driver - DVB functions
   3  *
   4  * Copyright (C) 2005-2007 Micronas
   5  *
   6  * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de>
   7  *                         Modifications for new nGene firmware,
   8  *                         support for EEPROM-copying,
   9  *                         support for new dual DVB-S2 card prototype
  10  *
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * version 2 only, as published by the Free Software Foundation.
  15  *
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  26  * 02110-1301, USA
  27  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/delay.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/io.h>
  36 #include <asm/div64.h>
  37 #include <linux/pci.h>
  38 #include <linux/timer.h>
  39 #include <linux/byteorder/generic.h>
  40 #include <linux/firmware.h>
  41 #include <linux/vmalloc.h>
  42
  43 #include "ngene.h"
  44
  45
  46 /****************************************************************************/
  47 /* COMMAND API interface ****************************************************/
  48 /****************************************************************************/
  49
  50 /****************************************************************************/
  51 /* DVB functions and API interface ******************************************/
  52 /****************************************************************************/
  53
  54 static void swap_buffer(u32 *p, u32 len)
  55 {
  56         while (len) {
  57                 *p = swab32(*p);
  58                 p++;
  59                 len -= 4;
  60         }
  61 }
  62
  63 void *tsin_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
  64 {
  65         struct ngene_channel *chan = priv;
  66
  67
  68         if (chan->users > 0)
  69                 dvb_dmx_swfilter(&chan->demux, buf, len);
  70         return NULL;
  71 }
  72
  73 u8 fill_ts[188] = { 0x47, 0x1f, 0xff, 0x10 };
  74
  75 void *tsout_exchange(void *priv, void *buf, u32 len, u32 clock, u32 flags)
  76 {
  77         struct ngene_channel *chan = priv;
  78         struct ngene *dev = chan->dev;
  79         u32 alen;
  80
  81         alen = dvb_ringbuffer_avail(&dev->tsout_rbuf);
  82         alen -= alen % 188;
  83
  84         if (alen < len)
  85                 FillTSBuffer(buf + alen, len - alen, flags);
  86         else
  87                 alen = len;
  88         dvb_ringbuffer_read(&dev->tsout_rbuf, buf, alen);
  89         if (flags & DF_SWAP32)
  90                 swap_buffer((u32 *)buf, alen);
  91         wake_up_interruptible(&dev->tsout_rbuf.queue);
  92         return buf;
  93 }
  94
  95
  96
  97 int ngene_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  98 {
  99         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 100         struct ngene_channel *chan = dvbdmx->priv;
 101
 102         if (chan->users == 0) {
 103                 if (!chan->dev->cmd_timeout_workaround || !chan->running)
 104                         set_transfer(chan, 1);
 105         }
 106
 107         return ++chan->users;
 108 }
 109
 110 int ngene_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
 111 {
 112         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 113         struct ngene_channel *chan = dvbdmx->priv;
 114
 115         if (--chan->users)
 116                 return chan->users;
 117
 118         if (!chan->dev->cmd_timeout_workaround)
 119                 set_transfer(chan, 0);
 120
 121         return 0;
 122 }
 123
 124 int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id,
 125                             int (*start_feed)(struct dvb_demux_feed *),
 126                             int (*stop_feed)(struct dvb_demux_feed *),
 127                             void *priv)
 128 {
 129         dvbdemux->priv = priv;
 130
 131         dvbdemux->filternum = 256;
 132         dvbdemux->feednum = 256;
 133         dvbdemux->start_feed = start_feed;
 134         dvbdemux->stop_feed = stop_feed;
 135         dvbdemux->write_to_decoder = NULL;
 136         dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
 137                                       DMX_SECTION_FILTERING |
 138                                       DMX_MEMORY_BASED_FILTERING);
 139         return dvb_dmx_init(dvbdemux);
 140 }
 141
 142 int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev,
 143                                struct dvb_demux *dvbdemux,
 144                                struct dmx_frontend *hw_frontend,
 145                                struct dmx_frontend *mem_frontend,
 146                                struct dvb_adapter *dvb_adapter)
 147 {
 148         int ret;
 149
 150         dmxdev->filternum = 256;
 151         dmxdev->demux = &dvbdemux->dmx;
 152         dmxdev->capabilities = 0;
 153         ret = dvb_dmxdev_init(dmxdev, dvb_adapter);
 154         if (ret < 0)
 155                 return ret;
 156
 157         hw_frontend->source = DMX_FRONTEND_0;
 158         dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend);
 159         mem_frontend->source = DMX_MEMORY_FE;
 160         dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend);
 161         return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend);
 162 }