drivers/media/video/au0828/au0828-dvb.c

   1 /*
   2  *  Driver for the Auvitek USB bridge
   3  *
   4  *  Copyright (c) 2008 Steven Toth <stoth@hauppauge.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 of the License, or
   9  *  (at your option) 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  *
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/device.h>
  25 #include <linux/suspend.h>
  26 #include <media/v4l2-common.h>
  27
  28 #include "au0828.h"
  29 #include "au8522.h"
  30 #include "xc5000.h"
  31
  32 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  33
  34 #define _AU0828_BULKPIPE 0x83
  35 #define _BULKPIPESIZE 0xe522
  36
  37 static struct au8522_config hauppauge_hvr950q_config = {
  38         .demod_address = 0x8e >> 1,
  39         .status_mode   = AU8522_DEMODLOCKING,
  40 };
  41
  42 static struct xc5000_config hauppauge_hvr950q_tunerconfig = {
  43         .i2c_address      = 0x61,
  44         .if_khz           = 6000,
  45         .tuner_callback   = au0828_tuner_callback
  46 };
  47
  48 /*-------------------------------------------------------------------*/
  49 static void urb_completion(struct urb *purb)
  50 {
  51         u8 *ptr;
  52         struct au0828_dev *dev = purb->context;
  53         int ptype = usb_pipetype(purb->pipe);
  54
  55         dprintk(2, "%s()\n", __func__);
  56
  57         if (!dev)
  58                 return;
  59
  60         if (dev->urb_streaming == 0)
  61                 return;
  62
  63         if (ptype != PIPE_BULK) {
  64                 printk(KERN_ERR "%s() Unsupported URB type %d\n",
  65                        __func__, ptype);
  66                 return;
  67         }
  68
  69         ptr = (u8 *)purb->transfer_buffer;
  70
  71         /* Feed the transport payload into the kernel demux */
  72         dvb_dmx_swfilter_packets(&dev->dvb.demux,
  73                 purb->transfer_buffer, purb->actual_length / 188);
  74
  75         /* Clean the buffer before we requeue */
  76         memset(purb->transfer_buffer, 0, URB_BUFSIZE);
  77
  78         /* Requeue URB */
  79         usb_submit_urb(purb, GFP_ATOMIC);
  80 }
  81
  82 static int stop_urb_transfer(struct au0828_dev *dev)
  83 {
  84         int i;
  85
  86         dprintk(2, "%s()\n", __func__);
  87
  88         for (i = 0; i < URB_COUNT; i++) {
  89                 usb_kill_urb(dev->urbs[i]);
  90                 kfree(dev->urbs[i]->transfer_buffer);
  91                 usb_free_urb(dev->urbs[i]);
  92         }
  93
  94         dev->urb_streaming = 0;
  95
  96         return 0;
  97 }
  98
  99 static int start_urb_transfer(struct au0828_dev *dev)
 100 {
 101         struct urb *purb;
 102         int i, ret = -ENOMEM;
 103
 104         dprintk(2, "%s()\n", __func__);
 105
 106         if (dev->urb_streaming) {
 107                 dprintk(2, "%s: iso xfer already running!\n", __func__);
 108                 return 0;
 109         }
 110
 111         for (i = 0; i < URB_COUNT; i++) {
 112
 113                 dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
 114                 if (!dev->urbs[i])
 115                         goto err;
 116
 117                 purb = dev->urbs[i];
 118
 119                 purb->transfer_buffer = kzalloc(URB_BUFSIZE, GFP_KERNEL);
 120                 if (!purb->transfer_buffer) {
 121                         usb_free_urb(purb);
 122                         dev->urbs[i] = NULL;
 123                         goto err;
 124                 }
 125
 126                 purb->status = -EINPROGRESS;
 127                 usb_fill_bulk_urb(purb,
 128                                   dev->usbdev,
 129                                   usb_rcvbulkpipe(dev->usbdev, _AU0828_BULKPIPE),
 130                                   purb->transfer_buffer,
 131                                   URB_BUFSIZE,
 132                                   urb_completion,
 133                                   dev);
 134
 135         }
 136
 137         for (i = 0; i < URB_COUNT; i++) {
 138                 ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
 139                 if (ret != 0) {
 140                         stop_urb_transfer(dev);
 141                         printk(KERN_ERR "%s: failed urb submission, "
 142                                "err = %d\n", __func__, ret);
 143                         return ret;
 144                 }
 145         }
 146
 147         dev->urb_streaming = 1;
 148         ret = 0;
 149
 150 err:
 151         return ret;
 152 }
 153
 154 static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
 155 {
 156         struct dvb_demux *demux = feed->demux;
 157         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 158         struct au0828_dvb *dvb = &dev->dvb;
 159         int ret = 0;
 160
 161         dprintk(1, "%s()\n", __func__);
 162
 163         if (!demux->dmx.frontend)
 164                 return -EINVAL;
 165
 166         if (dvb) {
 167                 mutex_lock(&dvb->lock);
 168                 if (dvb->feeding++ == 0) {
 169                         /* Start transport */
 170                         au0828_write(dev, 0x608, 0x90);
 171                         au0828_write(dev, 0x609, 0x72);
 172                         au0828_write(dev, 0x60a, 0x71);
 173                         au0828_write(dev, 0x60b, 0x01);
 174                         ret = start_urb_transfer(dev);
 175                 }
 176                 mutex_unlock(&dvb->lock);
 177         }
 178
 179         return ret;
 180 }
 181
 182 static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
 183 {
 184         struct dvb_demux *demux = feed->demux;
 185         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 186         struct au0828_dvb *dvb = &dev->dvb;
 187         int ret = 0;
 188
 189         dprintk(1, "%s()\n", __func__);
 190
 191         if (dvb) {
 192                 mutex_lock(&dvb->lock);
 193                 if (--dvb->feeding == 0) {
 194                         /* Stop transport */
 195                         au0828_write(dev, 0x608, 0x00);
 196                         au0828_write(dev, 0x609, 0x00);
 197                         au0828_write(dev, 0x60a, 0x00);
 198                         au0828_write(dev, 0x60b, 0x00);
 199                         ret = stop_urb_transfer(dev);
 200                 }
 201                 mutex_unlock(&dvb->lock);
 202         }
 203
 204         return ret;
 205 }
 206
 207 static int dvb_register(struct au0828_dev *dev)
 208 {
 209         struct au0828_dvb *dvb = &dev->dvb;
 210         int result;
 211
 212         dprintk(1, "%s()\n", __func__);
 213
 214         /* register adapter */
 215         result = dvb_register_adapter(&dvb->adapter, DRIVER_NAME, THIS_MODULE,
 216                                       &dev->usbdev->dev, adapter_nr);
 217         if (result < 0) {
 218                 printk(KERN_ERR "%s: dvb_register_adapter failed "
 219                        "(errno = %d)\n", DRIVER_NAME, result);
 220                 goto fail_adapter;
 221         }
 222         dvb->adapter.priv = dev;
 223
 224         /* register frontend */
 225         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 226         if (result < 0) {
 227                 printk(KERN_ERR "%s: dvb_register_frontend failed "
 228                        "(errno = %d)\n", DRIVER_NAME, result);
 229                 goto fail_frontend;
 230         }
 231
 232         /* register demux stuff */
 233         dvb->demux.dmx.capabilities =
 234                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 235                 DMX_MEMORY_BASED_FILTERING;
 236         dvb->demux.priv       = dev;
 237         dvb->demux.filternum  = 256;
 238         dvb->demux.feednum    = 256;
 239         dvb->demux.start_feed = au0828_dvb_start_feed;
 240         dvb->demux.stop_feed  = au0828_dvb_stop_feed;
 241         result = dvb_dmx_init(&dvb->demux);
 242         if (result < 0) {
 243                 printk(KERN_ERR "%s: dvb_dmx_init failed (errno = %d)\n",
 244                        DRIVER_NAME, result);
 245                 goto fail_dmx;
 246         }
 247
 248         dvb->dmxdev.filternum    = 256;
 249         dvb->dmxdev.demux        = &dvb->demux.dmx;
 250         dvb->dmxdev.capabilities = 0;
 251         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 252         if (result < 0) {
 253                 printk(KERN_ERR "%s: dvb_dmxdev_init failed (errno = %d)\n",
 254                        DRIVER_NAME, result);
 255                 goto fail_dmxdev;
 256         }
 257
 258         dvb->fe_hw.source = DMX_FRONTEND_0;
 259         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 260         if (result < 0) {
 261                 printk(KERN_ERR "%s: add_frontend failed "
 262                        "(DMX_FRONTEND_0, errno = %d)\n", DRIVER_NAME, result);
 263                 goto fail_fe_hw;
 264         }
 265
 266         dvb->fe_mem.source = DMX_MEMORY_FE;
 267         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 268         if (result < 0) {
 269                 printk(KERN_ERR "%s: add_frontend failed "
 270                        "(DMX_MEMORY_FE, errno = %d)\n", DRIVER_NAME, result);
 271                 goto fail_fe_mem;
 272         }
 273
 274         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 275         if (result < 0) {
 276                 printk(KERN_ERR "%s: connect_frontend failed (errno = %d)\n",
 277                        DRIVER_NAME, result);
 278                 goto fail_fe_conn;
 279         }
 280
 281         /* register network adapter */
 282         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 283         return 0;
 284
 285 fail_fe_conn:
 286         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 287 fail_fe_mem:
 288         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 289 fail_fe_hw:
 290         dvb_dmxdev_release(&dvb->dmxdev);
 291 fail_dmxdev:
 292         dvb_dmx_release(&dvb->demux);
 293 fail_dmx:
 294         dvb_unregister_frontend(dvb->frontend);
 295 fail_frontend:
 296         dvb_frontend_detach(dvb->frontend);
 297         dvb_unregister_adapter(&dvb->adapter);
 298 fail_adapter:
 299         return result;
 300 }
 301
 302 void au0828_dvb_unregister(struct au0828_dev *dev)
 303 {
 304         struct au0828_dvb *dvb = &dev->dvb;
 305
 306         dprintk(1, "%s()\n", __func__);
 307
 308         if (dvb->frontend == NULL)
 309                 return;
 310
 311         dvb_net_release(&dvb->net);
 312         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 313         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 314         dvb_dmxdev_release(&dvb->dmxdev);
 315         dvb_dmx_release(&dvb->demux);
 316         dvb_unregister_frontend(dvb->frontend);
 317         dvb_frontend_detach(dvb->frontend);
 318         dvb_unregister_adapter(&dvb->adapter);
 319 }
 320
 321 /* All the DVB attach calls go here, this function get's modified
 322  * for each new card. No other function in this file needs
 323  * to change.
 324  */
 325 int au0828_dvb_register(struct au0828_dev *dev)
 326 {
 327         struct au0828_dvb *dvb = &dev->dvb;
 328         int ret;
 329
 330         dprintk(1, "%s()\n", __func__);
 331
 332         /* init frontend */
 333         switch (dev->board) {
 334         case AU0828_BOARD_HAUPPAUGE_HVR850:
 335         case AU0828_BOARD_HAUPPAUGE_HVR950Q:
 336         case AU0828_BOARD_DVICO_FUSIONHDTV7:
 337                 dvb->frontend = dvb_attach(au8522_attach,
 338                                 &hauppauge_hvr950q_config,
 339                                 &dev->i2c_adap);
 340                 if (dvb->frontend != NULL)
 341                         dvb_attach(xc5000_attach, dvb->frontend,
 342                                 &dev->i2c_adap,
 343                                 &hauppauge_hvr950q_tunerconfig, dev);
 344                 break;
 345         default:
 346                 printk(KERN_WARNING "The frontend of your DVB/ATSC card "
 347                        "isn't supported yet\n");
 348                 break;
 349         }
 350         if (NULL == dvb->frontend) {
 351                 printk(KERN_ERR "%s() Frontend initialization failed\n",
 352                        __func__);
 353                 return -1;
 354         }
 355
 356         /* register everything */
 357         ret = dvb_register(dev);
 358         if (ret < 0) {
 359                 if (dvb->frontend->ops.release)
 360                         dvb->frontend->ops.release(dvb->frontend);
 361                 return ret;
 362         }
 363
 364         return 0;
 365 }