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         struct em28xx *dev = dvb->adapter.priv;
 141
 142         usb_set_interface(dev->udev, 0, 1);
 143         dev->em28xx_write_regs_req(dev, 0x00, 0x48, "\x00", 1);
 144
 145         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
 146                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
 147                                 dvb_isoc_copy, EM28XX_DIGITAL_CAPTURE);
 148 }
 149
 150 static int stop_streaming(struct em28xx_dvb *dvb)
 151 {
 152         struct em28xx *dev = dvb->adapter.priv;
 153
 154         em28xx_uninit_isoc(dev);
 155         return 0;
 156 }
 157
 158 static int start_feed(struct dvb_demux_feed *feed)
 159 {
 160         struct dvb_demux *demux  = feed->demux;
 161         struct em28xx_dvb *dvb = demux->priv;
 162         int rc, ret;
 163
 164         if (!demux->dmx.frontend)
 165                 return -EINVAL;
 166
 167         mutex_lock(&dvb->lock);
 168         dvb->nfeeds++;
 169         rc = dvb->nfeeds;
 170
 171         if (dvb->nfeeds == 1) {
 172                 ret = start_streaming(dvb);
 173                 if (ret < 0)
 174                         rc = ret;
 175         }
 176
 177         mutex_unlock(&dvb->lock);
 178         return rc;
 179 }
 180
 181 static int stop_feed(struct dvb_demux_feed *feed)
 182 {
 183         struct dvb_demux *demux  = feed->demux;
 184         struct em28xx_dvb *dvb = demux->priv;
 185         int err = 0;
 186
 187         mutex_lock(&dvb->lock);
 188         dvb->nfeeds--;
 189
 190         if (0 == dvb->nfeeds)
 191                 err = stop_streaming(dvb);
 192
 193         mutex_unlock(&dvb->lock);
 194         return err;
 195 }
 196
 197
 198 /* ------------------------------------------------------------------ */
 199
 200 static struct lgdt330x_config em2880_lgdt3303_dev = {
 201         .demod_address = 0x0e,
 202         .demod_chip = LGDT3303,
 203 };
 204
 205 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
 206         .demod_address = (0x1e >> 1),
 207         .no_tuner = 1,
 208         .parallel_ts = 1,
 209         .if2 = 45600,
 210 };
 211
 212 /* ------------------------------------------------------------------ */
 213
 214 static int attach_xc3028(u8 addr, struct em28xx *dev)
 215 {
 216         struct dvb_frontend *fe;
 217         struct xc2028_config cfg;
 218
 219         memset(&cfg, 0, sizeof(cfg));
 220         cfg.i2c_adap  = &dev->i2c_adap;
 221         cfg.i2c_addr  = addr;
 222         cfg.callback  = em28xx_tuner_callback;
 223
 224         if (!dev->dvb->frontend) {
 225                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 226                                 "Can't attach xc3028\n",
 227                        dev->name);
 228                 return -EINVAL;
 229         }
 230
 231         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
 232         if (!fe) {
 233                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
 234                        dev->name);
 235                 dvb_frontend_detach(dev->dvb->frontend);
 236                 dvb_unregister_frontend(dev->dvb->frontend);
 237                 dev->dvb->frontend = NULL;
 238                 return -EINVAL;
 239         }
 240
 241         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
 242
 243         return 0;
 244 }
 245
 246 /* ------------------------------------------------------------------ */
 247
 248 int register_dvb(struct em28xx_dvb *dvb,
 249                  struct module *module,
 250                  struct em28xx *dev,
 251                  struct device *device)
 252 {
 253         int result;
 254
 255         mutex_init(&dvb->lock);
 256
 257         /* register adapter */
 258         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 259                                       adapter_nr);
 260         if (result < 0) {
 261                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
 262                        dev->name, result);
 263                 goto fail_adapter;
 264         }
 265         dvb->adapter.priv = dev;
 266
 267         /* register frontend */
 268         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 269         if (result < 0) {
 270                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
 271                        dev->name, result);
 272                 goto fail_frontend;
 273         }
 274
 275         /* register demux stuff */
 276         dvb->demux.dmx.capabilities =
 277                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 278                 DMX_MEMORY_BASED_FILTERING;
 279         dvb->demux.priv       = dvb;
 280         dvb->demux.filternum  = 256;
 281         dvb->demux.feednum    = 256;
 282         dvb->demux.start_feed = start_feed;
 283         dvb->demux.stop_feed  = stop_feed;
 284         result = dvb_dmx_init(&dvb->demux);
 285         if (result < 0) {
 286                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 287                        dev->name, result);
 288                 goto fail_dmx;
 289         }
 290
 291         dvb->dmxdev.filternum    = 256;
 292         dvb->dmxdev.demux        = &dvb->demux.dmx;
 293         dvb->dmxdev.capabilities = 0;
 294         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 295         if (result < 0) {
 296                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 297                        dev->name, result);
 298                 goto fail_dmxdev;
 299         }
 300
 301         dvb->fe_hw.source = DMX_FRONTEND_0;
 302         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 303         if (result < 0) {
 304                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 305                        dev->name, result);
 306                 goto fail_fe_hw;
 307         }
 308
 309         dvb->fe_mem.source = DMX_MEMORY_FE;
 310         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 311         if (result < 0) {
 312                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 313                        dev->name, result);
 314                 goto fail_fe_mem;
 315         }
 316
 317         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 318         if (result < 0) {
 319                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
 320                        dev->name, result);
 321                 goto fail_fe_conn;
 322         }
 323
 324         /* register network adapter */
 325         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 326         return 0;
 327
 328 fail_fe_conn:
 329         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 330 fail_fe_mem:
 331         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 332 fail_fe_hw:
 333         dvb_dmxdev_release(&dvb->dmxdev);
 334 fail_dmxdev:
 335         dvb_dmx_release(&dvb->demux);
 336 fail_dmx:
 337         dvb_unregister_frontend(dvb->frontend);
 338 fail_frontend:
 339         dvb_frontend_detach(dvb->frontend);
 340         dvb_unregister_adapter(&dvb->adapter);
 341 fail_adapter:
 342         return result;
 343 }
 344
 345 static void unregister_dvb(struct em28xx_dvb *dvb)
 346 {
 347         dvb_net_release(&dvb->net);
 348         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 349         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 350         dvb_dmxdev_release(&dvb->dmxdev);
 351         dvb_dmx_release(&dvb->demux);
 352         dvb_unregister_frontend(dvb->frontend);
 353         dvb_frontend_detach(dvb->frontend);
 354         dvb_unregister_adapter(&dvb->adapter);
 355 }
 356
 357
 358 static int dvb_init(struct em28xx *dev)
 359 {
 360         int result = 0;
 361         struct em28xx_dvb *dvb;
 362
 363         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
 364
 365         if (dvb == NULL) {
 366                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
 367                 return -ENOMEM;
 368         }
 369         dev->dvb = dvb;
 370
 371         /* init frontend */
 372         switch (dev->model) {
 373         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_950:
 374                 /* Enable lgdt330x */
 375                 dev->mode = EM28XX_DIGITAL_MODE;
 376                 em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
 377
 378                 dvb->frontend = dvb_attach(lgdt330x_attach,
 379                                            &em2880_lgdt3303_dev,
 380                                            &dev->i2c_adap);
 381                 if (attach_xc3028(0x61, dev) < 0) {
 382                         result = -EINVAL;
 383                         goto out_free;
 384                 }
 385                 break;
 386         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
 387                 /* Enable zl10353 */
 388                 dev->mode = EM28XX_DIGITAL_MODE;
 389                 em28xx_tuner_callback(dev, XC2028_TUNER_RESET, 0);
 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         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
 419         return 0;
 420
 421 out_free:
 422         kfree(dvb);
 423         dev->dvb = NULL;
 424         return result;
 425 }
 426
 427 static int dvb_fini(struct em28xx *dev)
 428 {
 429         if (dev->dvb) {
 430                 unregister_dvb(dev->dvb);
 431                 dev->dvb = NULL;
 432         }
 433
 434         return 0;
 435 }
 436
 437 static struct em28xx_ops dvb_ops = {
 438         .id   = EM28XX_DVB,
 439         .name = "Em28xx dvb Extension",
 440         .init = dvb_init,
 441         .fini = dvb_fini,
 442 };
 443
 444 static int __init em28xx_dvb_register(void)
 445 {
 446         return em28xx_register_extension(&dvb_ops);
 447 }
 448
 449 static void __exit em28xx_dvb_unregister(void)
 450 {
 451         em28xx_unregister_extension(&dvb_ops);
 452 }
 453
 454 module_init(em28xx_dvb_register);
 455 module_exit(em28xx_dvb_unregister);