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