git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/em28xx/em28xx-dvb.c

   1 /*
   2  DVB device driver for em28xx
   3
   4  (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
   5
   6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
   7         - Fixes for the driver to properly work with HVR-950
   8         - Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
   9
  10  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
  11
  12  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
  13         (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  14         (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  15
  16  This program is free software; you can redistribute it and/or modify
  17  it under the terms of the GNU General Public License as published by
  18  the Free Software Foundation; either version 2 of the License.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/usb.h>
  23
  24 #include "em28xx.h"
  25 #include <media/v4l2-common.h>
  26 #include <media/videobuf-vmalloc.h>
  27
  28 #include "lgdt330x.h"
  29 #include "zl10353.h"
  30 #ifdef EM28XX_DRX397XD_SUPPORT
  31 #include "drx397xD.h"
  32 #endif
  33
  34 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  35 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  36 MODULE_LICENSE("GPL");
  37
  38 static unsigned int debug;
  39 module_param(debug, int, 0644);
  40 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  41
  42 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  43
  44 #define dprintk(level, fmt, arg...) do {                        \
  45 if (debug >= level)                                             \
  46         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  47 } while (0)
  48
  49 #define EM28XX_DVB_NUM_BUFS 5
  50 #define EM28XX_DVB_MAX_PACKETSIZE 564
  51 #define EM28XX_DVB_MAX_PACKETS 64
  52
  53 struct em28xx_dvb {
  54         struct dvb_frontend        *frontend;
  55
  56         /* feed count management */
  57         struct mutex               lock;
  58         int                        nfeeds;
  59
  60         /* general boilerplate stuff */
  61         struct dvb_adapter         adapter;
  62         struct dvb_demux           demux;
  63         struct dmxdev              dmxdev;
  64         struct dmx_frontend        fe_hw;
  65         struct dmx_frontend        fe_mem;
  66         struct dvb_net             net;
  67 };
  68
  69
  70 static inline void print_err_status(struct em28xx *dev,
  71                                      int packet, int status)
  72 {
  73         char *errmsg = "Unknown";
  74
  75         switch (status) {
  76         case -ENOENT:
  77                 errmsg = "unlinked synchronuously";
  78                 break;
  79         case -ECONNRESET:
  80                 errmsg = "unlinked asynchronuously";
  81                 break;
  82         case -ENOSR:
  83                 errmsg = "Buffer error (overrun)";
  84                 break;
  85         case -EPIPE:
  86                 errmsg = "Stalled (device not responding)";
  87                 break;
  88         case -EOVERFLOW:
  89                 errmsg = "Babble (bad cable?)";
  90                 break;
  91         case -EPROTO:
  92                 errmsg = "Bit-stuff error (bad cable?)";
  93                 break;
  94         case -EILSEQ:
  95                 errmsg = "CRC/Timeout (could be anything)";
  96                 break;
  97         case -ETIME:
  98                 errmsg = "Device does not respond";
  99                 break;
 100         }
 101         if (packet < 0) {
 102                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
 103         } else {
 104                 dprintk(1, "URB packet %d, status %d [%s].\n",
 105                         packet, status, errmsg);
 106         }
 107 }
 108
 109 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
 110 {
 111         int i;
 112
 113         if (!dev)
 114                 return 0;
 115
 116         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 117                 return 0;
 118
 119         if (urb->status < 0) {
 120                 print_err_status(dev, -1, urb->status);
 121                 if (urb->status == -ENOENT)
 122                         return 0;
 123         }
 124
 125         for (i = 0; i < urb->number_of_packets; i++) {
 126                 int status = urb->iso_frame_desc[i].status;
 127
 128                 if (status < 0) {
 129                         print_err_status(dev, i, status);
 130                         if (urb->iso_frame_desc[i].status != -EPROTO)
 131                                 continue;
 132                 }
 133
 134                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 135                                  urb->iso_frame_desc[i].offset,
 136                                  urb->iso_frame_desc[i].actual_length);
 137         }
 138
 139         return 0;
 140 }
 141
 142 static int start_streaming(struct em28xx_dvb *dvb)
 143 {
 144         int rc;
 145         struct em28xx *dev = dvb->adapter.priv;
 146
 147         usb_set_interface(dev->udev, 0, 1);
 148         rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 149         if (rc < 0)
 150                 return rc;
 151
 152         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 153                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
 154                                 dvb_isoc_copy);
 155 }
 156
 157 static int stop_streaming(struct em28xx_dvb *dvb)
 158 {
 159         struct em28xx *dev = dvb->adapter.priv;
 160
 161         em28xx_uninit_isoc(dev);
 162
 163         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 164
 165         return 0;
 166 }
 167
 168 static int start_feed(struct dvb_demux_feed *feed)
 169 {
 170         struct dvb_demux *demux  = feed->demux;
 171         struct em28xx_dvb *dvb = demux->priv;
 172         int rc, ret;
 173
 174         if (!demux->dmx.frontend)
 175                 return -EINVAL;
 176
 177         mutex_lock(&dvb->lock);
 178         dvb->nfeeds++;
 179         rc = dvb->nfeeds;
 180
 181         if (dvb->nfeeds == 1) {
 182                 ret = start_streaming(dvb);
 183                 if (ret < 0)
 184                         rc = ret;
 185         }
 186
 187         mutex_unlock(&dvb->lock);
 188         return rc;
 189 }
 190
 191 static int stop_feed(struct dvb_demux_feed *feed)
 192 {
 193         struct dvb_demux *demux  = feed->demux;
 194         struct em28xx_dvb *dvb = demux->priv;
 195         int err = 0;
 196
 197         mutex_lock(&dvb->lock);
 198         dvb->nfeeds--;
 199
 200         if (0 == dvb->nfeeds)
 201                 err = stop_streaming(dvb);
 202
 203         mutex_unlock(&dvb->lock);
 204         return err;
 205 }
 206
 207
 208
 209 /* ------------------------------------------------------------------ */
 210 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 211 {
 212         struct em28xx *dev = fe->dvb->priv;
 213
 214         if (acquire)
 215                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 216         else
 217                 return em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 218 }
 219
 220 /* ------------------------------------------------------------------ */
 221
 222 static struct lgdt330x_config em2880_lgdt3303_dev = {
 223         .demod_address = 0x0e,
 224         .demod_chip = LGDT3303,
 225 };
 226
 227 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 228         .demod_address = (0x1e >> 1),
 229         .no_tuner = 1,
 230         .parallel_ts = 1,
 231         .if2 = 45600,
 232 };
 233
 234 #ifdef EM28XX_DRX397XD_SUPPORT
 235 /* [TODO] djh - not sure yet what the device config needs to contain */
 236 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
 237         .demod_address = (0xe0 >> 1),
 238 };
 239 #endif
 240
 241 /* ------------------------------------------------------------------ */
 242
 243 static int attach_xc3028(u8 addr, struct em28xx *dev)
 244 {
 245         struct dvb_frontend *fe;
 246         struct xc2028_config cfg;
 247
 248         memset(&cfg, 0, sizeof(cfg));
 249         cfg.i2c_adap  = &dev->i2c_adap;
 250         cfg.i2c_addr  = addr;
 251         cfg.callback  = em28xx_tuner_callback;
 252
 253         if (!dev->dvb->frontend) {
 254                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 255                                 "Can't attach xc3028\n",
 256                        dev->name);
 257                 return -EINVAL;
 258         }
 259
 260         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 261         if (!fe) {
 262                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 263                        dev->name);
 264                 dvb_frontend_detach(dev->dvb->frontend);
 265                 dev->dvb->frontend = NULL;
 266                 return -EINVAL;
 267         }
 268
 269         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 270
 271         return 0;
 272 }
 273
 274 /* ------------------------------------------------------------------ */
 275
 276 int register_dvb(struct em28xx_dvb *dvb,
 277                  struct module *module,
 278                  struct em28xx *dev,
 279                  struct device *device)
 280 {
 281         int result;
 282
 283         mutex_init(&dvb->lock);
 284
 285         /* register adapter */
 286         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 287                                       adapter_nr);
 288         if (result < 0) {
 289                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 290                        dev->name, result);
 291                 goto fail_adapter;
 292         }
 293
 294         /* Ensure all frontends negotiate bus access */
 295         dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
 296
 297         dvb->adapter.priv = dev;
 298
 299         /* register frontend */
 300         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 301         if (result < 0) {
 302                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 303                        dev->name, result);
 304                 goto fail_frontend;
 305         }
 306
 307         /* register demux stuff */
 308         dvb->demux.dmx.capabilities =
 309                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 310                 DMX_MEMORY_BASED_FILTERING;
 311         dvb->demux.priv       = dvb;
 312         dvb->demux.filternum  = 256;
 313         dvb->demux.feednum    = 256;
 314         dvb->demux.start_feed = start_feed;
 315         dvb->demux.stop_feed  = stop_feed;
 316
 317         result = dvb_dmx_init(&dvb->demux);
 318         if (result < 0) {
 319                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 320                        dev->name, result);
 321                 goto fail_dmx;
 322         }
 323
 324         dvb->dmxdev.filternum    = 256;
 325         dvb->dmxdev.demux        = &dvb->demux.dmx;
 326         dvb->dmxdev.capabilities = 0;
 327         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 328         if (result < 0) {
 329                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 330                        dev->name, result);
 331                 goto fail_dmxdev;
 332         }
 333
 334         dvb->fe_hw.source = DMX_FRONTEND_0;
 335         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 336         if (result < 0) {
 337                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 338                        dev->name, result);
 339                 goto fail_fe_hw;
 340         }
 341
 342         dvb->fe_mem.source = DMX_MEMORY_FE;
 343         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 344         if (result < 0) {
 345                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 346                        dev->name, result);
 347                 goto fail_fe_mem;
 348         }
 349
 350         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 351         if (result < 0) {
 352                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 353                        dev->name, result);
 354                 goto fail_fe_conn;
 355         }
 356
 357         /* register network adapter */
 358         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 359         return 0;
 360
 361 fail_fe_conn:
 362         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 363 fail_fe_mem:
 364         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 365 fail_fe_hw:
 366         dvb_dmxdev_release(&dvb->dmxdev);
 367 fail_dmxdev:
 368         dvb_dmx_release(&dvb->demux);
 369 fail_dmx:
 370         dvb_unregister_frontend(dvb->frontend);
 371 fail_frontend:
 372         dvb_frontend_detach(dvb->frontend);
 373         dvb_unregister_adapter(&dvb->adapter);
 374 fail_adapter:
 375         return result;
 376 }
 377
 378 static void unregister_dvb(struct em28xx_dvb *dvb)
 379 {
 380         dvb_net_release(&dvb->net);
 381         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 382         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 383         dvb_dmxdev_release(&dvb->dmxdev);
 384         dvb_dmx_release(&dvb->demux);
 385         dvb_unregister_frontend(dvb->frontend);
 386         dvb_frontend_detach(dvb->frontend);
 387         dvb_unregister_adapter(&dvb->adapter);
 388 }
 389
 390
 391 static int dvb_init(struct em28xx *dev)
 392 {
 393         int result = 0;
 394         struct em28xx_dvb *dvb;
 395
 396         if (!dev->has_dvb) {
 397                 /* This device does not support the extension */
 398                 return 0;
 399         }
 400
 401         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 402
 403         if (dvb == NULL) {
 404                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
 405                 return -ENOMEM;
 406         }
 407         dev->dvb = dvb;
 408
 409         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 410         /* init frontend */
 411         switch (dev->model) {
 412         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 413         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
 414                 dvb->frontend = dvb_attach(lgdt330x_attach,
 415                                            &em2880_lgdt3303_dev,
 416                                            &dev->i2c_adap);
 417                 if (attach_xc3028(0x61, dev) < 0) {
 418                         result = -EINVAL;
 419                         goto out_free;
 420                 }
 421                 break;
 422         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 423                 dvb->frontend = dvb_attach(zl10353_attach,
 424                                            &em28xx_zl10353_with_xc3028,
 425                                            &dev->i2c_adap);
 426                 if (attach_xc3028(0x61, dev) < 0) {
 427                         result = -EINVAL;
 428                         goto out_free;
 429                 }
 430                 break;
 431         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
 432 #ifdef EM28XX_DRX397XD_SUPPORT
 433                 /* We don't have the config structure properly populated, so
 434                    this is commented out for now */
 435                 dvb->frontend = dvb_attach(drx397xD_attach,
 436                                            &em28xx_drx397xD_with_xc3028,
 437                                            &dev->i2c_adap);
 438                 if (attach_xc3028(0x61, dev) < 0) {
 439                         result = -EINVAL;
 440                         goto out_free;
 441                 }
 442                 break;
 443 #endif
 444         default:
 445                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 446                                 " isn't supported yet\n",
 447                        dev->name);
 448                 break;
 449         }
 450         if (NULL == dvb->frontend) {
 451                 printk(KERN_ERR
 452                        "%s/2: frontend initialization failed\n",
 453                        dev->name);
 454                 result = -EINVAL;
 455                 goto out_free;
 456         }
 457
 458         /* register everything */
 459         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 460
 461         if (result < 0)
 462                 goto out_free;
 463
 464         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 465         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 466         return 0;
 467
 468 out_free:
 469         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 470         kfree(dvb);
 471         dev->dvb = NULL;
 472         return result;
 473 }
 474
 475 static int dvb_fini(struct em28xx *dev)
 476 {
 477         if (!dev->has_dvb) {
 478                 /* This device does not support the extension */
 479                 return 0;
 480         }
 481
 482         if (dev->dvb) {
 483                 unregister_dvb(dev->dvb);
 484                 dev->dvb = NULL;
 485         }
 486
 487         return 0;
 488 }
 489
 490 static struct em28xx_ops dvb_ops = {
 491         .id   = EM28XX_DVB,
 492         .name = "Em28xx dvb Extension",
 493         .init = dvb_init,
 494         .fini = dvb_fini,
 495 };
 496
 497 static int __init em28xx_dvb_register(void)
 498 {
 499         return em28xx_register_extension(&dvb_ops);
 500 }
 501
 502 static void __exit em28xx_dvb_unregister(void)
 503 {
 504         em28xx_unregister_extension(&dvb_ops);
 505 }
 506
 507 module_init(em28xx_dvb_register);
 508 module_exit(em28xx_dvb_unregister);