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
   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 struct lgdt330x_config em2880_lgdt3303_dev = {
 207         .demod_address = 0x0e,
 208         .demod_chip = LGDT3303,
 209 };
 210
 211 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 212         .demod_address = (0x1e >> 1),
 213         .no_tuner = 1,
 214         .parallel_ts = 1,
 215         .if2 = 45600,
 216 };
 217
 218 /* ------------------------------------------------------------------ */
 219
 220 static int attach_xc3028(u8 addr, struct em28xx *dev)
 221 {
 222         struct dvb_frontend *fe;
 223         struct xc2028_config cfg;
 224
 225         memset(&cfg, 0, sizeof(cfg));
 226         cfg.i2c_adap  = &dev->i2c_adap;
 227         cfg.i2c_addr  = addr;
 228         cfg.callback  = em28xx_tuner_callback;
 229
 230         if (!dev->dvb->frontend) {
 231                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 232                                 "Can't attach xc3028\n",
 233                        dev->name);
 234                 return -EINVAL;
 235         }
 236
 237         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 238         if (!fe) {
 239                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 240                        dev->name);
 241                 dvb_frontend_detach(dev->dvb->frontend);
 242                 dvb_unregister_frontend(dev->dvb->frontend);
 243                 dev->dvb->frontend = NULL;
 244                 return -EINVAL;
 245         }
 246
 247         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 248
 249         return 0;
 250 }
 251
 252 /* ------------------------------------------------------------------ */
 253
 254 int register_dvb(struct em28xx_dvb *dvb,
 255                  struct module *module,
 256                  struct em28xx *dev,
 257                  struct device *device)
 258 {
 259         int result;
 260
 261         mutex_init(&dvb->lock);
 262
 263         /* register adapter */
 264         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 265                                       adapter_nr);
 266         if (result < 0) {
 267                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 268                        dev->name, result);
 269                 goto fail_adapter;
 270         }
 271         dvb->adapter.priv = dev;
 272
 273         /* register frontend */
 274         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 275         if (result < 0) {
 276                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 277                        dev->name, result);
 278                 goto fail_frontend;
 279         }
 280
 281         /* register demux stuff */
 282         dvb->demux.dmx.capabilities =
 283                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 284                 DMX_MEMORY_BASED_FILTERING;
 285         dvb->demux.priv       = dvb;
 286         dvb->demux.filternum  = 256;
 287         dvb->demux.feednum    = 256;
 288         dvb->demux.start_feed = start_feed;
 289         dvb->demux.stop_feed  = stop_feed;
 290         result = dvb_dmx_init(&dvb->demux);
 291         if (result < 0) {
 292                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 293                        dev->name, result);
 294                 goto fail_dmx;
 295         }
 296
 297         dvb->dmxdev.filternum    = 256;
 298         dvb->dmxdev.demux        = &dvb->demux.dmx;
 299         dvb->dmxdev.capabilities = 0;
 300         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 301         if (result < 0) {
 302                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 303                        dev->name, result);
 304                 goto fail_dmxdev;
 305         }
 306
 307         dvb->fe_hw.source = DMX_FRONTEND_0;
 308         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 309         if (result < 0) {
 310                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 311                        dev->name, result);
 312                 goto fail_fe_hw;
 313         }
 314
 315         dvb->fe_mem.source = DMX_MEMORY_FE;
 316         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 317         if (result < 0) {
 318                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 319                        dev->name, result);
 320                 goto fail_fe_mem;
 321         }
 322
 323         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 324         if (result < 0) {
 325                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 326                        dev->name, result);
 327                 goto fail_fe_conn;
 328         }
 329
 330         /* register network adapter */
 331         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 332         return 0;
 333
 334 fail_fe_conn:
 335         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 336 fail_fe_mem:
 337         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 338 fail_fe_hw:
 339         dvb_dmxdev_release(&dvb->dmxdev);
 340 fail_dmxdev:
 341         dvb_dmx_release(&dvb->demux);
 342 fail_dmx:
 343         dvb_unregister_frontend(dvb->frontend);
 344 fail_frontend:
 345         dvb_frontend_detach(dvb->frontend);
 346         dvb_unregister_adapter(&dvb->adapter);
 347 fail_adapter:
 348         return result;
 349 }
 350
 351 static void unregister_dvb(struct em28xx_dvb *dvb)
 352 {
 353         dvb_net_release(&dvb->net);
 354         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 355         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 356         dvb_dmxdev_release(&dvb->dmxdev);
 357         dvb_dmx_release(&dvb->demux);
 358         dvb_unregister_frontend(dvb->frontend);
 359         dvb_frontend_detach(dvb->frontend);
 360         dvb_unregister_adapter(&dvb->adapter);
 361 }
 362
 363
 364 static int dvb_init(struct em28xx *dev)
 365 {
 366         int result = 0;
 367         struct em28xx_dvb *dvb;
 368
 369         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 370
 371         if (dvb == NULL) {
 372                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
 373                 return -ENOMEM;
 374         }
 375         dev->dvb = dvb;
 376
 377         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
 378         /* init frontend */
 379         switch (dev->model) {
 380         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 381                 dvb->frontend = dvb_attach(lgdt330x_attach,
 382                                            &em2880_lgdt3303_dev,
 383                                            &dev->i2c_adap);
 384                 if (attach_xc3028(0x61, dev) < 0) {
 385                         result = -EINVAL;
 386                         goto out_free;
 387                 }
 388                 break;
 389         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 390                 dvb->frontend = dvb_attach(zl10353_attach,
 391                                            &em28xx_zl10353_with_xc3028,
 392                                            &dev->i2c_adap);
 393                 if (attach_xc3028(0x61, dev) < 0) {
 394                         result = -EINVAL;
 395                         goto out_free;
 396                 }
 397                 break;
 398         default:
 399                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 400                                 " isn't supported yet\n",
 401                        dev->name);
 402                 break;
 403         }
 404         if (NULL == dvb->frontend) {
 405                 printk(KERN_ERR
 406                        "%s/2: frontend initialization failed\n",
 407                        dev->name);
 408                 result = -EINVAL;
 409                 goto out_free;
 410         }
 411
 412         /* register everything */
 413         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 414
 415         if (result < 0)
 416                 goto out_free;
 417
 418         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 419         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 420         return 0;
 421
 422 out_free:
 423         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
 424         kfree(dvb);
 425         dev->dvb = NULL;
 426         return result;
 427 }
 428
 429 static int dvb_fini(struct em28xx *dev)
 430 {
 431         if (dev->dvb) {
 432                 unregister_dvb(dev->dvb);
 433                 dev->dvb = NULL;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static struct em28xx_ops dvb_ops = {
 440         .id   = EM28XX_DVB,
 441         .name = "Em28xx dvb Extension",
 442         .init = dvb_init,
 443         .fini = dvb_fini,
 444 };
 445
 446 static int __init em28xx_dvb_register(void)
 447 {
 448         return em28xx_register_extension(&dvb_ops);
 449 }
 450
 451 static void __exit em28xx_dvb_unregister(void)
 452 {
 453         em28xx_unregister_extension(&dvb_ops);
 454 }
 455
 456 module_init(em28xx_dvb_register);
 457 module_exit(em28xx_dvb_unregister);