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         - 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 #include "s5h1409.h"
  32 #ifdef EM28XX_DRX397XD_SUPPORT
  33 #include "drx397xD.h"
  34 #endif
  35
  36 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
  37 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
  38 MODULE_LICENSE("GPL");
  39
  40 static unsigned int debug;
  41 module_param(debug, int, 0644);
  42 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  43
  44 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  45
  46 #define dprintk(level, fmt, arg...) do {                        \
  47 if (debug >= level)                                             \
  48         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  49 } while (0)
  50
  51 #define EM28XX_DVB_NUM_BUFS 5
  52 #define EM28XX_DVB_MAX_PACKETSIZE 564
  53 #define EM28XX_DVB_MAX_PACKETS 64
  54
  55 struct em28xx_dvb {
  56         struct dvb_frontend        *frontend;
  57
  58         /* feed count management */
  59         struct mutex               lock;
  60         int                        nfeeds;
  61
  62         /* general boilerplate stuff */
  63         struct dvb_adapter         adapter;
  64         struct dvb_demux           demux;
  65         struct dmxdev              dmxdev;
  66         struct dmx_frontend        fe_hw;
  67         struct dmx_frontend        fe_mem;
  68         struct dvb_net             net;
  69 };
  70
  71
  72 static inline void print_err_status(struct em28xx *dev,
  73                                      int packet, int status)
  74 {
  75         char *errmsg = "Unknown";
  76
  77         switch (status) {
  78         case -ENOENT:
  79                 errmsg = "unlinked synchronuously";
  80                 break;
  81         case -ECONNRESET:
  82                 errmsg = "unlinked asynchronuously";
  83                 break;
  84         case -ENOSR:
  85                 errmsg = "Buffer error (overrun)";
  86                 break;
  87         case -EPIPE:
  88                 errmsg = "Stalled (device not responding)";
  89                 break;
  90         case -EOVERFLOW:
  91                 errmsg = "Babble (bad cable?)";
  92                 break;
  93         case -EPROTO:
  94                 errmsg = "Bit-stuff error (bad cable?)";
  95                 break;
  96         case -EILSEQ:
  97                 errmsg = "CRC/Timeout (could be anything)";
  98                 break;
  99         case -ETIME:
 100                 errmsg = "Device does not respond";
 101                 break;
 102         }
 103         if (packet < 0) {
 104                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
 105         } else {
 106                 dprintk(1, "URB packet %d, status %d [%s].\n",
 107                         packet, status, errmsg);
 108         }
 109 }
 110
 111 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
 112 {
 113         int i;
 114
 115         if (!dev)
 116                 return 0;
 117
 118         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 119                 return 0;
 120
 121         if (urb->status < 0) {
 122                 print_err_status(dev, -1, urb->status);
 123                 if (urb->status == -ENOENT)
 124                         return 0;
 125         }
 126
 127         for (i = 0; i < urb->number_of_packets; i++) {
 128                 int status = urb->iso_frame_desc[i].status;
 129
 130                 if (status < 0) {
 131                         print_err_status(dev, i, status);
 132                         if (urb->iso_frame_desc[i].status != -EPROTO)
 133                                 continue;
 134                 }
 135
 136                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 137                                  urb->iso_frame_desc[i].offset,
 138                                  urb->iso_frame_desc[i].actual_length);
 139         }
 140
 141         return 0;
 142 }
 143
 144 static int start_streaming(struct em28xx_dvb *dvb)
 145 {
 146         int rc;
 147         struct em28xx *dev = dvb->adapter.priv;
 148
 149         usb_set_interface(dev->udev, 0, 1);
 150         rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 151         if (rc < 0)
 152                 return rc;
 153
 154         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 155                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
 156                                 dvb_isoc_copy);
 157 }
 158
 159 static int stop_streaming(struct em28xx_dvb *dvb)
 160 {
 161         struct em28xx *dev = dvb->adapter.priv;
 162
 163         em28xx_uninit_isoc(dev);
 164
 165         em28xx_set_mode(dev, EM28XX_SUSPEND);
 166
 167         return 0;
 168 }
 169
 170 static int start_feed(struct dvb_demux_feed *feed)
 171 {
 172         struct dvb_demux *demux  = feed->demux;
 173         struct em28xx_dvb *dvb = demux->priv;
 174         int rc, ret;
 175
 176         if (!demux->dmx.frontend)
 177                 return -EINVAL;
 178
 179         mutex_lock(&dvb->lock);
 180         dvb->nfeeds++;
 181         rc = dvb->nfeeds;
 182
 183         if (dvb->nfeeds == 1) {
 184                 ret = start_streaming(dvb);
 185                 if (ret < 0)
 186                         rc = ret;
 187         }
 188
 189         mutex_unlock(&dvb->lock);
 190         return rc;
 191 }
 192
 193 static int stop_feed(struct dvb_demux_feed *feed)
 194 {
 195         struct dvb_demux *demux  = feed->demux;
 196         struct em28xx_dvb *dvb = demux->priv;
 197         int err = 0;
 198
 199         mutex_lock(&dvb->lock);
 200         dvb->nfeeds--;
 201
 202         if (0 == dvb->nfeeds)
 203                 err = stop_streaming(dvb);
 204
 205         mutex_unlock(&dvb->lock);
 206         return err;
 207 }
 208
 209
 210
 211 /* ------------------------------------------------------------------ */
 212 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 213 {
 214         struct em28xx *dev = fe->dvb->priv;
 215
 216         if (acquire)
 217                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 218         else
 219                 return em28xx_set_mode(dev, EM28XX_SUSPEND);
 220 }
 221
 222 /* ------------------------------------------------------------------ */
 223
 224 static struct lgdt330x_config em2880_lgdt3303_dev = {
 225         .demod_address = 0x0e,
 226         .demod_chip = LGDT3303,
 227 };
 228
 229 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 230         .demod_address = (0x1e >> 1),
 231         .no_tuner = 1,
 232         .parallel_ts = 1,
 233         .if2 = 45600,
 234 };
 235
 236 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
 237         .demod_address = 0x32 >> 1,
 238         .output_mode   = S5H1409_PARALLEL_OUTPUT,
 239         .gpio          = S5H1409_GPIO_OFF,
 240         .inversion     = S5H1409_INVERSION_OFF,
 241         .status_mode   = S5H1409_DEMODLOCKING,
 242         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
 243 };
 244
 245 #ifdef EM28XX_DRX397XD_SUPPORT
 246 /* [TODO] djh - not sure yet what the device config needs to contain */
 247 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
 248         .demod_address = (0xe0 >> 1),
 249 };
 250 #endif
 251
 252 /* ------------------------------------------------------------------ */
 253
 254 static int attach_xc3028(u8 addr, struct em28xx *dev)
 255 {
 256         struct dvb_frontend *fe;
 257         struct xc2028_config cfg;
 258
 259         memset(&cfg, 0, sizeof(cfg));
 260         cfg.i2c_adap  = &dev->i2c_adap;
 261         cfg.i2c_addr  = addr;
 262
 263         if (!dev->dvb->frontend) {
 264                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 265                                 "Can't attach xc3028\n",
 266                        dev->name);
 267                 return -EINVAL;
 268         }
 269
 270         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 271         if (!fe) {
 272                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 273                        dev->name);
 274                 dvb_frontend_detach(dev->dvb->frontend);
 275                 dev->dvb->frontend = NULL;
 276                 return -EINVAL;
 277         }
 278
 279         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 280
 281         return 0;
 282 }
 283
 284 /* ------------------------------------------------------------------ */
 285
 286 static int register_dvb(struct em28xx_dvb *dvb,
 287                  struct module *module,
 288                  struct em28xx *dev,
 289                  struct device *device)
 290 {
 291         int result;
 292
 293         mutex_init(&dvb->lock);
 294
 295         /* register adapter */
 296         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 297                                       adapter_nr);
 298         if (result < 0) {
 299                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 300                        dev->name, result);
 301                 goto fail_adapter;
 302         }
 303
 304         /* Ensure all frontends negotiate bus access */
 305         dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
 306
 307         dvb->adapter.priv = dev;
 308
 309         /* register frontend */
 310         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 311         if (result < 0) {
 312                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 313                        dev->name, result);
 314                 goto fail_frontend;
 315         }
 316
 317         /* register demux stuff */
 318         dvb->demux.dmx.capabilities =
 319                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 320                 DMX_MEMORY_BASED_FILTERING;
 321         dvb->demux.priv       = dvb;
 322         dvb->demux.filternum  = 256;
 323         dvb->demux.feednum    = 256;
 324         dvb->demux.start_feed = start_feed;
 325         dvb->demux.stop_feed  = stop_feed;
 326
 327         result = dvb_dmx_init(&dvb->demux);
 328         if (result < 0) {
 329                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 330                        dev->name, result);
 331                 goto fail_dmx;
 332         }
 333
 334         dvb->dmxdev.filternum    = 256;
 335         dvb->dmxdev.demux        = &dvb->demux.dmx;
 336         dvb->dmxdev.capabilities = 0;
 337         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 338         if (result < 0) {
 339                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 340                        dev->name, result);
 341                 goto fail_dmxdev;
 342         }
 343
 344         dvb->fe_hw.source = DMX_FRONTEND_0;
 345         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 346         if (result < 0) {
 347                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 348                        dev->name, result);
 349                 goto fail_fe_hw;
 350         }
 351
 352         dvb->fe_mem.source = DMX_MEMORY_FE;
 353         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 354         if (result < 0) {
 355                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 356                        dev->name, result);
 357                 goto fail_fe_mem;
 358         }
 359
 360         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 361         if (result < 0) {
 362                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 363                        dev->name, result);
 364                 goto fail_fe_conn;
 365         }
 366
 367         /* register network adapter */
 368         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 369         return 0;
 370
 371 fail_fe_conn:
 372         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 373 fail_fe_mem:
 374         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 375 fail_fe_hw:
 376         dvb_dmxdev_release(&dvb->dmxdev);
 377 fail_dmxdev:
 378         dvb_dmx_release(&dvb->demux);
 379 fail_dmx:
 380         dvb_unregister_frontend(dvb->frontend);
 381 fail_frontend:
 382         dvb_frontend_detach(dvb->frontend);
 383         dvb_unregister_adapter(&dvb->adapter);
 384 fail_adapter:
 385         return result;
 386 }
 387
 388 static void unregister_dvb(struct em28xx_dvb *dvb)
 389 {
 390         dvb_net_release(&dvb->net);
 391         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 392         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 393         dvb_dmxdev_release(&dvb->dmxdev);
 394         dvb_dmx_release(&dvb->demux);
 395         dvb_unregister_frontend(dvb->frontend);
 396         dvb_frontend_detach(dvb->frontend);
 397         dvb_unregister_adapter(&dvb->adapter);
 398 }
 399
 400
 401 static int dvb_init(struct em28xx *dev)
 402 {
 403         int result = 0;
 404         struct em28xx_dvb *dvb;
 405
 406         if (!dev->board.has_dvb) {
 407                 /* This device does not support the extension */
 408                 return 0;
 409         }
 410
 411         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 412
 413         if (dvb == NULL) {
 414                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
 415                 return -ENOMEM;
 416         }
 417         dev->dvb = dvb;
 418
 419         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 420         /* init frontend */
 421         switch (dev->model) {
 422         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
 423         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
 424         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
 425         case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
 426                 dvb->frontend = dvb_attach(lgdt330x_attach,
 427                                            &em2880_lgdt3303_dev,
 428                                            &dev->i2c_adap);
 429                 if (attach_xc3028(0x61, dev) < 0) {
 430                         result = -EINVAL;
 431                         goto out_free;
 432                 }
 433                 break;
 434         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 435         case EM2880_BOARD_TERRATEC_HYBRID_XS:
 436         case EM2880_BOARD_KWORLD_DVB_310U:
 437                 dvb->frontend = dvb_attach(zl10353_attach,
 438                                            &em28xx_zl10353_with_xc3028,
 439                                            &dev->i2c_adap);
 440                 if (attach_xc3028(0x61, dev) < 0) {
 441                         result = -EINVAL;
 442                         goto out_free;
 443                 }
 444                 break;
 445         case EM2883_BOARD_KWORLD_HYBRID_330U:
 446                 dvb->frontend = dvb_attach(s5h1409_attach,
 447                                            &em28xx_s5h1409_with_xc3028,
 448                                            &dev->i2c_adap);
 449                 if (attach_xc3028(0x61, dev) < 0) {
 450                         result = -EINVAL;
 451                         goto out_free;
 452                 }
 453                 break;
 454         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
 455 #ifdef EM28XX_DRX397XD_SUPPORT
 456                 /* We don't have the config structure properly populated, so
 457                    this is commented out for now */
 458                 dvb->frontend = dvb_attach(drx397xD_attach,
 459                                            &em28xx_drx397xD_with_xc3028,
 460                                            &dev->i2c_adap);
 461                 if (attach_xc3028(0x61, dev) < 0) {
 462                         result = -EINVAL;
 463                         goto out_free;
 464                 }
 465                 break;
 466 #endif
 467         default:
 468                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 469                                 " isn't supported yet\n",
 470                        dev->name);
 471                 break;
 472         }
 473         if (NULL == dvb->frontend) {
 474                 printk(KERN_ERR
 475                        "%s/2: frontend initialization failed\n",
 476                        dev->name);
 477                 result = -EINVAL;
 478                 goto out_free;
 479         }
 480         /* define general-purpose callback pointer */
 481         dvb->frontend->callback = em28xx_tuner_callback;
 482
 483         /* register everything */
 484         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 485
 486         if (result < 0)
 487                 goto out_free;
 488
 489         em28xx_set_mode(dev, EM28XX_SUSPEND);
 490         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 491         return 0;
 492
 493 out_free:
 494         em28xx_set_mode(dev, EM28XX_SUSPEND);
 495         kfree(dvb);
 496         dev->dvb = NULL;
 497         return result;
 498 }
 499
 500 static int dvb_fini(struct em28xx *dev)
 501 {
 502         if (!dev->board.has_dvb) {
 503                 /* This device does not support the extension */
 504                 return 0;
 505         }
 506
 507         if (dev->dvb) {
 508                 unregister_dvb(dev->dvb);
 509                 dev->dvb = NULL;
 510         }
 511
 512         return 0;
 513 }
 514
 515 static struct em28xx_ops dvb_ops = {
 516         .id   = EM28XX_DVB,
 517         .name = "Em28xx dvb Extension",
 518         .init = dvb_init,
 519         .fini = dvb_fini,
 520 };
 521
 522 static int __init em28xx_dvb_register(void)
 523 {
 524         return em28xx_register_extension(&dvb_ops);
 525 }
 526
 527 static void __exit em28xx_dvb_unregister(void)
 528 {
 529         em28xx_unregister_extension(&dvb_ops);
 530 }
 531
 532 module_init(em28xx_dvb_register);
 533 module_exit(em28xx_dvb_unregister);