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