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 #include <media/tuner.h>
  29 #include "tuner-simple.h"
  30
  31 #include "lgdt330x.h"
  32 #include "zl10353.h"
  33 #include "s5h1409.h"
  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_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         int max_dvb_packet_size;
 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         max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev);
 154
 155         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 156                                 EM28XX_DVB_NUM_BUFS, max_dvb_packet_size,
 157                                 dvb_isoc_copy);
 158 }
 159
 160 static int stop_streaming(struct em28xx_dvb *dvb)
 161 {
 162         struct em28xx *dev = dvb->adapter.priv;
 163
 164         em28xx_uninit_isoc(dev);
 165
 166         em28xx_set_mode(dev, EM28XX_SUSPEND);
 167
 168         return 0;
 169 }
 170
 171 static int start_feed(struct dvb_demux_feed *feed)
 172 {
 173         struct dvb_demux *demux  = feed->demux;
 174         struct em28xx_dvb *dvb = demux->priv;
 175         int rc, ret;
 176
 177         if (!demux->dmx.frontend)
 178                 return -EINVAL;
 179
 180         mutex_lock(&dvb->lock);
 181         dvb->nfeeds++;
 182         rc = dvb->nfeeds;
 183
 184         if (dvb->nfeeds == 1) {
 185                 ret = start_streaming(dvb);
 186                 if (ret < 0)
 187                         rc = ret;
 188         }
 189
 190         mutex_unlock(&dvb->lock);
 191         return rc;
 192 }
 193
 194 static int stop_feed(struct dvb_demux_feed *feed)
 195 {
 196         struct dvb_demux *demux  = feed->demux;
 197         struct em28xx_dvb *dvb = demux->priv;
 198         int err = 0;
 199
 200         mutex_lock(&dvb->lock);
 201         dvb->nfeeds--;
 202
 203         if (0 == dvb->nfeeds)
 204                 err = stop_streaming(dvb);
 205
 206         mutex_unlock(&dvb->lock);
 207         return err;
 208 }
 209
 210
 211
 212 /* ------------------------------------------------------------------ */
 213 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 214 {
 215         struct em28xx *dev = fe->dvb->priv;
 216
 217         if (acquire)
 218                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 219         else
 220                 return em28xx_set_mode(dev, EM28XX_SUSPEND);
 221 }
 222
 223 /* ------------------------------------------------------------------ */
 224
 225 static struct lgdt330x_config em2880_lgdt3303_dev = {
 226         .demod_address = 0x0e,
 227         .demod_chip = LGDT3303,
 228 };
 229
 230 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 231         .demod_address = (0x1e >> 1),
 232         .no_tuner = 1,
 233         .parallel_ts = 1,
 234         .if2 = 45600,
 235 };
 236
 237 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
 238         .demod_address = 0x32 >> 1,
 239         .output_mode   = S5H1409_PARALLEL_OUTPUT,
 240         .gpio          = S5H1409_GPIO_OFF,
 241         .inversion     = S5H1409_INVERSION_OFF,
 242         .status_mode   = S5H1409_DEMODLOCKING,
 243         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
 244 };
 245
 246 #ifdef EM28XX_DRX397XD_SUPPORT
 247 /* [TODO] djh - not sure yet what the device config needs to contain */
 248 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
 249         .demod_address = (0xe0 >> 1),
 250 };
 251 #endif
 252
 253 /* ------------------------------------------------------------------ */
 254
 255 static int attach_xc3028(u8 addr, struct em28xx *dev)
 256 {
 257         struct dvb_frontend *fe;
 258         struct xc2028_config cfg;
 259
 260         memset(&cfg, 0, sizeof(cfg));
 261         cfg.i2c_adap  = &dev->i2c_adap;
 262         cfg.i2c_addr  = addr;
 263
 264         if (!dev->dvb->frontend) {
 265                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 266                                 "Can't attach xc3028\n",
 267                        dev->name);
 268                 return -EINVAL;
 269         }
 270
 271         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 272         if (!fe) {
 273                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 274                        dev->name);
 275                 dvb_frontend_detach(dev->dvb->frontend);
 276                 dev->dvb->frontend = NULL;
 277                 return -EINVAL;
 278         }
 279
 280         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 281
 282         return 0;
 283 }
 284
 285 /* ------------------------------------------------------------------ */
 286
 287 static int register_dvb(struct em28xx_dvb *dvb,
 288                  struct module *module,
 289                  struct em28xx *dev,
 290                  struct device *device)
 291 {
 292         int result;
 293
 294         mutex_init(&dvb->lock);
 295
 296         /* register adapter */
 297         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 298                                       adapter_nr);
 299         if (result < 0) {
 300                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 301                        dev->name, result);
 302                 goto fail_adapter;
 303         }
 304
 305         /* Ensure all frontends negotiate bus access */
 306         dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
 307
 308         dvb->adapter.priv = dev;
 309
 310         /* register frontend */
 311         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 312         if (result < 0) {
 313                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 314                        dev->name, result);
 315                 goto fail_frontend;
 316         }
 317
 318         /* register demux stuff */
 319         dvb->demux.dmx.capabilities =
 320                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 321                 DMX_MEMORY_BASED_FILTERING;
 322         dvb->demux.priv       = dvb;
 323         dvb->demux.filternum  = 256;
 324         dvb->demux.feednum    = 256;
 325         dvb->demux.start_feed = start_feed;
 326         dvb->demux.stop_feed  = stop_feed;
 327
 328         result = dvb_dmx_init(&dvb->demux);
 329         if (result < 0) {
 330                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 331                        dev->name, result);
 332                 goto fail_dmx;
 333         }
 334
 335         dvb->dmxdev.filternum    = 256;
 336         dvb->dmxdev.demux        = &dvb->demux.dmx;
 337         dvb->dmxdev.capabilities = 0;
 338         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 339         if (result < 0) {
 340                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 341                        dev->name, result);
 342                 goto fail_dmxdev;
 343         }
 344
 345         dvb->fe_hw.source = DMX_FRONTEND_0;
 346         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 347         if (result < 0) {
 348                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 349                        dev->name, result);
 350                 goto fail_fe_hw;
 351         }
 352
 353         dvb->fe_mem.source = DMX_MEMORY_FE;
 354         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 355         if (result < 0) {
 356                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 357                        dev->name, result);
 358                 goto fail_fe_mem;
 359         }
 360
 361         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 362         if (result < 0) {
 363                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 364                        dev->name, result);
 365                 goto fail_fe_conn;
 366         }
 367
 368         /* register network adapter */
 369         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 370         return 0;
 371
 372 fail_fe_conn:
 373         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 374 fail_fe_mem:
 375         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 376 fail_fe_hw:
 377         dvb_dmxdev_release(&dvb->dmxdev);
 378 fail_dmxdev:
 379         dvb_dmx_release(&dvb->demux);
 380 fail_dmx:
 381         dvb_unregister_frontend(dvb->frontend);
 382 fail_frontend:
 383         dvb_frontend_detach(dvb->frontend);
 384         dvb_unregister_adapter(&dvb->adapter);
 385 fail_adapter:
 386         return result;
 387 }
 388
 389 static void unregister_dvb(struct em28xx_dvb *dvb)
 390 {
 391         dvb_net_release(&dvb->net);
 392         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 393         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 394         dvb_dmxdev_release(&dvb->dmxdev);
 395         dvb_dmx_release(&dvb->demux);
 396         dvb_unregister_frontend(dvb->frontend);
 397         dvb_frontend_detach(dvb->frontend);
 398         dvb_unregister_adapter(&dvb->adapter);
 399 }
 400
 401
 402 static int dvb_init(struct em28xx *dev)
 403 {
 404         int result = 0;
 405         struct em28xx_dvb *dvb;
 406
 407         if (!dev->board.has_dvb) {
 408                 /* This device does not support the extension */
 409                 return 0;
 410         }
 411
 412         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 413
 414         if (dvb == NULL) {
 415                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
 416                 return -ENOMEM;
 417         }
 418         dev->dvb = dvb;
 419
 420         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 421         /* init frontend */
 422         switch (dev->model) {
 423         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
 424         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
 425         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
 426         case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
 427                 dvb->frontend = dvb_attach(lgdt330x_attach,
 428                                            &em2880_lgdt3303_dev,
 429                                            &dev->i2c_adap);
 430                 if (attach_xc3028(0x61, dev) < 0) {
 431                         result = -EINVAL;
 432                         goto out_free;
 433                 }
 434                 break;
 435         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 436         case EM2880_BOARD_TERRATEC_HYBRID_XS:
 437         case EM2880_BOARD_KWORLD_DVB_310U:
 438         case EM2880_BOARD_EMPIRE_DUAL_TV:
 439                 dvb->frontend = dvb_attach(zl10353_attach,
 440                                            &em28xx_zl10353_with_xc3028,
 441                                            &dev->i2c_adap);
 442                 if (attach_xc3028(0x61, dev) < 0) {
 443                         result = -EINVAL;
 444                         goto out_free;
 445                 }
 446                 break;
 447         case EM2883_BOARD_KWORLD_HYBRID_330U:
 448         case EM2882_BOARD_EVGA_INDTUBE:
 449                 dvb->frontend = dvb_attach(s5h1409_attach,
 450                                            &em28xx_s5h1409_with_xc3028,
 451                                            &dev->i2c_adap);
 452                 if (attach_xc3028(0x61, dev) < 0) {
 453                         result = -EINVAL;
 454                         goto out_free;
 455                 }
 456                 break;
 457         case EM2882_BOARD_KWORLD_ATSC_315U:
 458                 dvb->frontend = dvb_attach(lgdt330x_attach,
 459                                            &em2880_lgdt3303_dev,
 460                                            &dev->i2c_adap);
 461                 if (dvb->frontend != NULL) {
 462                         if (!dvb_attach(simple_tuner_attach, dvb->frontend,
 463                                 &dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
 464                                 result = -EINVAL;
 465                                 goto out_free;
 466                         }
 467                 }
 468                 break;
 469         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
 470 #ifdef EM28XX_DRX397XD_SUPPORT
 471                 /* We don't have the config structure properly populated, so
 472                    this is commented out for now */
 473                 dvb->frontend = dvb_attach(drx397xD_attach,
 474                                            &em28xx_drx397xD_with_xc3028,
 475                                            &dev->i2c_adap);
 476                 if (attach_xc3028(0x61, dev) < 0) {
 477                         result = -EINVAL;
 478                         goto out_free;
 479                 }
 480                 break;
 481 #endif
 482         default:
 483                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 484                                 " isn't supported yet\n",
 485                        dev->name);
 486                 break;
 487         }
 488         if (NULL == dvb->frontend) {
 489                 printk(KERN_ERR
 490                        "%s/2: frontend initialization failed\n",
 491                        dev->name);
 492                 result = -EINVAL;
 493                 goto out_free;
 494         }
 495         /* define general-purpose callback pointer */
 496         dvb->frontend->callback = em28xx_tuner_callback;
 497
 498         /* register everything */
 499         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 500
 501         if (result < 0)
 502                 goto out_free;
 503
 504         em28xx_set_mode(dev, EM28XX_SUSPEND);
 505         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 506         return 0;
 507
 508 out_free:
 509         em28xx_set_mode(dev, EM28XX_SUSPEND);
 510         kfree(dvb);
 511         dev->dvb = NULL;
 512         return result;
 513 }
 514
 515 static int dvb_fini(struct em28xx *dev)
 516 {
 517         if (!dev->board.has_dvb) {
 518                 /* This device does not support the extension */
 519                 return 0;
 520         }
 521
 522         if (dev->dvb) {
 523                 unregister_dvb(dev->dvb);
 524                 dev->dvb = NULL;
 525         }
 526
 527         return 0;
 528 }
 529
 530 static struct em28xx_ops dvb_ops = {
 531         .id   = EM28XX_DVB,
 532         .name = "Em28xx dvb Extension",
 533         .init = dvb_init,
 534         .fini = dvb_fini,
 535 };
 536
 537 static int __init em28xx_dvb_register(void)
 538 {
 539         return em28xx_register_extension(&dvb_ops);
 540 }
 541
 542 static void __exit em28xx_dvb_unregister(void)
 543 {
 544         em28xx_unregister_extension(&dvb_ops);
 545 }
 546
 547 module_init(em28xx_dvb_register);
 548 module_exit(em28xx_dvb_unregister);