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         - Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
  10
  11  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
  12
  13  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
  14         (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  15         (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
  16
  17  This program is free software; you can redistribute it and/or modify
  18  it under the terms of the GNU General Public License as published by
  19  the Free Software Foundation; either version 2 of the License.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/usb.h>
  24
  25 #include "em28xx.h"
  26 #include <media/v4l2-common.h>
  27 #include <media/videobuf-vmalloc.h>
  28
  29 #include "lgdt330x.h"
  30 #include "zl10353.h"
  31 #ifdef EM28XX_DRX397XD_SUPPORT
  32 #include "drx397xD.h"
  33 #endif
  34
  35 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  36 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  37 MODULE_LICENSE("GPL");
  38
  39 static unsigned int debug;
  40 module_param(debug, int, 0644);
  41 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  42
  43 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  44
  45 #define dprintk(level, fmt, arg...) do {                        \
  46 if (debug >= level)                                             \
  47         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  48 } while (0)
  49
  50 #define EM28XX_DVB_NUM_BUFS 5
  51 #define EM28XX_DVB_MAX_PACKETSIZE 564
  52 #define EM28XX_DVB_MAX_PACKETS 64
  53
  54 struct em28xx_dvb {
  55         struct dvb_frontend        *frontend;
  56
  57         /* feed count management */
  58         struct mutex               lock;
  59         int                        nfeeds;
  60
  61         /* general boilerplate stuff */
  62         struct dvb_adapter         adapter;
  63         struct dvb_demux           demux;
  64         struct dmxdev              dmxdev;
  65         struct dmx_frontend        fe_hw;
  66         struct dmx_frontend        fe_mem;
  67         struct dvb_net             net;
  68 };
  69
  70
  71 static inline void print_err_status(struct em28xx *dev,
  72                                      int packet, int status)
  73 {
  74         char *errmsg = "Unknown";
  75
  76         switch (status) {
  77         case -ENOENT:
  78                 errmsg = "unlinked synchronuously";
  79                 break;
  80         case -ECONNRESET:
  81                 errmsg = "unlinked asynchronuously";
  82                 break;
  83         case -ENOSR:
  84                 errmsg = "Buffer error (overrun)";
  85                 break;
  86         case -EPIPE:
  87                 errmsg = "Stalled (device not responding)";
  88                 break;
  89         case -EOVERFLOW:
  90                 errmsg = "Babble (bad cable?)";
  91                 break;
  92         case -EPROTO:
  93                 errmsg = "Bit-stuff error (bad cable?)";
  94                 break;
  95         case -EILSEQ:
  96                 errmsg = "CRC/Timeout (could be anything)";
  97                 break;
  98         case -ETIME:
  99                 errmsg = "Device does not respond";
 100                 break;
 101         }
 102         if (packet < 0) {
 103                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
 104         } else {
 105                 dprintk(1, "URB packet %d, status %d [%s].\n",
 106                         packet, status, errmsg);
 107         }
 108 }
 109
 110 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
 111 {
 112         int i;
 113
 114         if (!dev)
 115                 return 0;
 116
 117         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 118                 return 0;
 119
 120         if (urb->status < 0) {
 121                 print_err_status(dev, -1, urb->status);
 122                 if (urb->status == -ENOENT)
 123                         return 0;
 124         }
 125
 126         for (i = 0; i < urb->number_of_packets; i++) {
 127                 int status = urb->iso_frame_desc[i].status;
 128
 129                 if (status < 0) {
 130                         print_err_status(dev, i, status);
 131                         if (urb->iso_frame_desc[i].status != -EPROTO)
 132                                 continue;
 133                 }
 134
 135                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 136                                  urb->iso_frame_desc[i].offset,
 137                                  urb->iso_frame_desc[i].actual_length);
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int start_streaming(struct em28xx_dvb *dvb)
 144 {
 145         int rc;
 146         struct em28xx *dev = dvb->adapter.priv;
 147
 148         usb_set_interface(dev->udev, 0, 1);
 149         rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 150         if (rc < 0)
 151                 return rc;
 152
 153         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 154                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
 155                                 dvb_isoc_copy);
 156 }
 157
 158 static int stop_streaming(struct em28xx_dvb *dvb)
 159 {
 160         struct em28xx *dev = dvb->adapter.priv;
 161
 162         em28xx_uninit_isoc(dev);
 163
 164         em28xx_set_mode(dev, EM28XX_SUSPEND);
 165
 166         return 0;
 167 }
 168
 169 static int start_feed(struct dvb_demux_feed *feed)
 170 {
 171         struct dvb_demux *demux  = feed->demux;
 172         struct em28xx_dvb *dvb = demux->priv;
 173         int rc, ret;
 174
 175         if (!demux->dmx.frontend)
 176                 return -EINVAL;
 177
 178         mutex_lock(&dvb->lock);
 179         dvb->nfeeds++;
 180         rc = dvb->nfeeds;
 181
 182         if (dvb->nfeeds == 1) {
 183                 ret = start_streaming(dvb);
 184                 if (ret < 0)
 185                         rc = ret;
 186         }
 187
 188         mutex_unlock(&dvb->lock);
 189         return rc;
 190 }
 191
 192 static int stop_feed(struct dvb_demux_feed *feed)
 193 {
 194         struct dvb_demux *demux  = feed->demux;
 195         struct em28xx_dvb *dvb = demux->priv;
 196         int err = 0;
 197
 198         mutex_lock(&dvb->lock);
 199         dvb->nfeeds--;
 200
 201         if (0 == dvb->nfeeds)
 202                 err = stop_streaming(dvb);
 203
 204         mutex_unlock(&dvb->lock);
 205         return err;
 206 }
 207
 208
 209
 210 /* ------------------------------------------------------------------ */
 211 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 212 {
 213         struct em28xx *dev = fe->dvb->priv;
 214
 215         if (acquire)
 216                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 217         else
 218                 return em28xx_set_mode(dev, EM28XX_SUSPEND);
 219 }
 220
 221 /* ------------------------------------------------------------------ */
 222
 223 static struct lgdt330x_config em2880_lgdt3303_dev = {
 224         .demod_address = 0x0e,
 225         .demod_chip = LGDT3303,
 226 };
 227
 228 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 229         .demod_address = (0x1e >> 1),
 230         .no_tuner = 1,
 231         .parallel_ts = 1,
 232         .if2 = 45600,
 233 };
 234
 235 #ifdef EM28XX_DRX397XD_SUPPORT
 236 /* [TODO] djh - not sure yet what the device config needs to contain */
 237 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
 238         .demod_address = (0xe0 >> 1),
 239 };
 240 #endif
 241
 242 /* ------------------------------------------------------------------ */
 243
 244 static int attach_xc3028(u8 addr, struct em28xx *dev)
 245 {
 246         struct dvb_frontend *fe;
 247         struct xc2028_config cfg;
 248
 249         memset(&cfg, 0, sizeof(cfg));
 250         cfg.i2c_adap  = &dev->i2c_adap;
 251         cfg.i2c_addr  = addr;
 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 static 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->board.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 EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
 413         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
 414         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
 415         case EM2883_BOARD_KWORLD_HYBRID_A316:
 416         case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
 417                 dvb->frontend = dvb_attach(lgdt330x_attach,
 418                                            &em2880_lgdt3303_dev,
 419                                            &dev->i2c_adap);
 420                 if (attach_xc3028(0x61, dev) < 0) {
 421                         result = -EINVAL;
 422                         goto out_free;
 423                 }
 424                 break;
 425         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 426         case EM2880_BOARD_TERRATEC_HYBRID_XS:
 427         case EM2880_BOARD_KWORLD_DVB_310U:
 428                 dvb->frontend = dvb_attach(zl10353_attach,
 429                                            &em28xx_zl10353_with_xc3028,
 430                                            &dev->i2c_adap);
 431                 if (attach_xc3028(0x61, dev) < 0) {
 432                         result = -EINVAL;
 433                         goto out_free;
 434                 }
 435                 break;
 436         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
 437 #ifdef EM28XX_DRX397XD_SUPPORT
 438                 /* We don't have the config structure properly populated, so
 439                    this is commented out for now */
 440                 dvb->frontend = dvb_attach(drx397xD_attach,
 441                                            &em28xx_drx397xD_with_xc3028,
 442                                            &dev->i2c_adap);
 443                 if (attach_xc3028(0x61, dev) < 0) {
 444                         result = -EINVAL;
 445                         goto out_free;
 446                 }
 447                 break;
 448 #endif
 449         default:
 450                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 451                                 " isn't supported yet\n",
 452                        dev->name);
 453                 break;
 454         }
 455         if (NULL == dvb->frontend) {
 456                 printk(KERN_ERR
 457                        "%s/2: frontend initialization failed\n",
 458                        dev->name);
 459                 result = -EINVAL;
 460                 goto out_free;
 461         }
 462         /* define general-purpose callback pointer */
 463         dvb->frontend->callback = em28xx_tuner_callback;
 464
 465         /* register everything */
 466         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 467
 468         if (result < 0)
 469                 goto out_free;
 470
 471         em28xx_set_mode(dev, EM28XX_SUSPEND);
 472         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 473         return 0;
 474
 475 out_free:
 476         em28xx_set_mode(dev, EM28XX_SUSPEND);
 477         kfree(dvb);
 478         dev->dvb = NULL;
 479         return result;
 480 }
 481
 482 static int dvb_fini(struct em28xx *dev)
 483 {
 484         if (!dev->board.has_dvb) {
 485                 /* This device does not support the extension */
 486                 return 0;
 487         }
 488
 489         if (dev->dvb) {
 490                 unregister_dvb(dev->dvb);
 491                 dev->dvb = NULL;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static struct em28xx_ops dvb_ops = {
 498         .id   = EM28XX_DVB,
 499         .name = "Em28xx dvb Extension",
 500         .init = dvb_init,
 501         .fini = dvb_fini,
 502 };
 503
 504 static int __init em28xx_dvb_register(void)
 505 {
 506         return em28xx_register_extension(&dvb_ops);
 507 }
 508
 509 static void __exit em28xx_dvb_unregister(void)
 510 {
 511         em28xx_unregister_extension(&dvb_ops);
 512 }
 513
 514 module_init(em28xx_dvb_register);
 515 module_exit(em28xx_dvb_unregister);