drivers/media/usb/tm6000/tm6000-dvb.c

   1 /*
   2  *  tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
   3  *
   4  *  Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation version 2
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/usb.h>
  19
  20 #include "tm6000.h"
  21 #include "tm6000-regs.h"
  22
  23 #include "zl10353.h"
  24
  25 #include <media/tuner.h>
  26
  27 #include "tuner-xc2028.h"
  28 #include "xc5000.h"
  29
  30 MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
  31 MODULE_AUTHOR("Mauro Carvalho Chehab");
  32 MODULE_LICENSE("GPL");
  33
  34 MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},{{Trident, tm6000},{{Trident, tm6010}");
  35
  36 static int debug;
  37
  38 module_param(debug, int, 0644);
  39 MODULE_PARM_DESC(debug, "enable debug message");
  40
  41 static inline void print_err_status(struct tm6000_core *dev,
  42                                     int packet, int status)
  43 {
  44         char *errmsg = "Unknown";
  45
  46         switch (status) {
  47         case -ENOENT:
  48                 errmsg = "unlinked synchronously";
  49                 break;
  50         case -ECONNRESET:
  51                 errmsg = "unlinked asynchronously";
  52                 break;
  53         case -ENOSR:
  54                 errmsg = "Buffer error (overrun)";
  55                 break;
  56         case -EPIPE:
  57                 errmsg = "Stalled (device not responding)";
  58                 break;
  59         case -EOVERFLOW:
  60                 errmsg = "Babble (bad cable?)";
  61                 break;
  62         case -EPROTO:
  63                 errmsg = "Bit-stuff error (bad cable?)";
  64                 break;
  65         case -EILSEQ:
  66                 errmsg = "CRC/Timeout (could be anything)";
  67                 break;
  68         case -ETIME:
  69                 errmsg = "Device does not respond";
  70                 break;
  71         }
  72         if (packet < 0) {
  73                 dprintk(dev, 1, "URB status %d [%s].\n",
  74                         status, errmsg);
  75         } else {
  76                 dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
  77                         packet, status, errmsg);
  78         }
  79 }
  80
  81 static void tm6000_urb_received(struct urb *urb)
  82 {
  83         int ret;
  84         struct tm6000_core *dev = urb->context;
  85
  86         switch (urb->status) {
  87         case 0:
  88         case -ETIMEDOUT:
  89                 break;
  90         case -ENOENT:
  91         case -ECONNRESET:
  92         case -ESHUTDOWN:
  93                 return;
  94         default:
  95                 print_err_status(dev, 0, urb->status);
  96         }
  97
  98         if (urb->actual_length > 0)
  99                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
 100                                                    urb->actual_length);
 101
 102         if (dev->dvb->streams > 0) {
 103                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 104                 if (ret < 0) {
 105                         printk(KERN_ERR "tm6000:  error %s\n", __func__);
 106                         kfree(urb->transfer_buffer);
 107                         usb_free_urb(urb);
 108                         dev->dvb->bulk_urb = NULL;
 109                 }
 110         }
 111 }
 112
 113 static int tm6000_start_stream(struct tm6000_core *dev)
 114 {
 115         int ret;
 116         unsigned int pipe, size;
 117         struct tm6000_dvb *dvb = dev->dvb;
 118
 119         printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
 120
 121         if (dev->mode != TM6000_MODE_DIGITAL) {
 122                 tm6000_init_digital_mode(dev);
 123                 dev->mode = TM6000_MODE_DIGITAL;
 124         }
 125
 126         dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 127         if (!dvb->bulk_urb)
 128                 return -ENOMEM;
 129
 130         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 131                                                           & USB_ENDPOINT_NUMBER_MASK);
 132
 133         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 134         size = size * 15; /* 512 x 8 or 12 or 15 */
 135
 136         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 137         if (!dvb->bulk_urb->transfer_buffer) {
 138                 usb_free_urb(dvb->bulk_urb);
 139                 dvb->bulk_urb = NULL;
 140                 return -ENOMEM;
 141         }
 142
 143         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 144                                                  dvb->bulk_urb->transfer_buffer,
 145                                                  size,
 146                                                  tm6000_urb_received, dev);
 147
 148         ret = usb_clear_halt(dev->udev, pipe);
 149         if (ret < 0) {
 150                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 151                                                         ret, __func__);
 152
 153                 kfree(dvb->bulk_urb->transfer_buffer);
 154                 usb_free_urb(dvb->bulk_urb);
 155                 dvb->bulk_urb = NULL;
 156                 return ret;
 157         } else
 158                 printk(KERN_ERR "tm6000: pipe resetted\n");
 159
 160 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 161         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 162
 163 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 164         if (ret) {
 165                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 166                                                                         ret);
 167
 168                 kfree(dvb->bulk_urb->transfer_buffer);
 169                 usb_free_urb(dvb->bulk_urb);
 170                 dvb->bulk_urb = NULL;
 171                 return ret;
 172         }
 173
 174         return 0;
 175 }
 176
 177 static void tm6000_stop_stream(struct tm6000_core *dev)
 178 {
 179         struct tm6000_dvb *dvb = dev->dvb;
 180
 181         if (dvb->bulk_urb) {
 182                 printk(KERN_INFO "urb killing\n");
 183                 usb_kill_urb(dvb->bulk_urb);
 184                 printk(KERN_INFO "urb buffer free\n");
 185                 kfree(dvb->bulk_urb->transfer_buffer);
 186                 usb_free_urb(dvb->bulk_urb);
 187                 dvb->bulk_urb = NULL;
 188         }
 189 }
 190
 191 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 192 {
 193         struct dvb_demux *demux = feed->demux;
 194         struct tm6000_core *dev = demux->priv;
 195         struct tm6000_dvb *dvb = dev->dvb;
 196         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 197
 198         mutex_lock(&dvb->mutex);
 199         if (dvb->streams == 0) {
 200                 dvb->streams = 1;
 201 /*              mutex_init(&tm6000_dev->streming_mutex); */
 202                 tm6000_start_stream(dev);
 203         } else
 204                 ++(dvb->streams);
 205         mutex_unlock(&dvb->mutex);
 206
 207         return 0;
 208 }
 209
 210 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 211 {
 212         struct dvb_demux *demux = feed->demux;
 213         struct tm6000_core *dev = demux->priv;
 214         struct tm6000_dvb *dvb = dev->dvb;
 215
 216         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 217
 218         mutex_lock(&dvb->mutex);
 219
 220         printk(KERN_INFO "stream %#x\n", dvb->streams);
 221         --(dvb->streams);
 222         if (dvb->streams == 0) {
 223                 printk(KERN_INFO "stop stream\n");
 224                 tm6000_stop_stream(dev);
 225 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 226         }
 227         mutex_unlock(&dvb->mutex);
 228 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 229
 230         return 0;
 231 }
 232
 233 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 234 {
 235         struct tm6000_dvb *dvb = dev->dvb;
 236
 237         if (dev->caps.has_zl10353) {
 238                 struct zl10353_config config = {
 239                                      .demod_address = dev->demod_addr,
 240                                      .no_tuner = 1,
 241                                      .parallel_ts = 1,
 242                                      .if2 = 45700,
 243                                      .disable_i2c_gate_ctrl = 1,
 244                                     };
 245
 246                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 247                                                            &dev->i2c_adap);
 248         } else {
 249                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 250                 return -1;
 251         }
 252
 253         return (!dvb->frontend) ? -1 : 0;
 254 }
 255
 256 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 257
 258 static int register_dvb(struct tm6000_core *dev)
 259 {
 260         int ret = -1;
 261         struct tm6000_dvb *dvb = dev->dvb;
 262
 263         mutex_init(&dvb->mutex);
 264
 265         dvb->streams = 0;
 266
 267         /* attach the frontend */
 268         ret = tm6000_dvb_attach_frontend(dev);
 269         if (ret < 0) {
 270                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 271                 goto err;
 272         }
 273
 274         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 275                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 276         if (ret < 0) {
 277                 pr_err("tm6000: couldn't register the adapter!\n");
 278                 goto err;
 279         }
 280
 281         dvb->adapter.priv = dev;
 282
 283         if (dvb->frontend) {
 284                 switch (dev->tuner_type) {
 285                 case TUNER_XC2028: {
 286                         struct xc2028_config cfg = {
 287                                 .i2c_adap = &dev->i2c_adap,
 288                                 .i2c_addr = dev->tuner_addr,
 289                         };
 290
 291                         dvb->frontend->callback = tm6000_tuner_callback;
 292                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 293                         if (ret < 0) {
 294                                 printk(KERN_ERR
 295                                         "tm6000: couldn't register frontend\n");
 296                                 goto adapter_err;
 297                         }
 298
 299                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 300                                 printk(KERN_ERR "tm6000: couldn't register frontend (xc3028)\n");
 301                                 ret = -EINVAL;
 302                                 goto frontend_err;
 303                         }
 304                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be attached to frontend!\n");
 305                         break;
 306                         }
 307                 case TUNER_XC5000: {
 308                         struct xc5000_config cfg = {
 309                                 .i2c_address = dev->tuner_addr,
 310                         };
 311
 312                         dvb->frontend->callback = tm6000_xc5000_callback;
 313                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 314                         if (ret < 0) {
 315                                 printk(KERN_ERR
 316                                         "tm6000: couldn't register frontend\n");
 317                                 goto adapter_err;
 318                         }
 319
 320                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 321                                 printk(KERN_ERR "tm6000: couldn't register frontend (xc5000)\n");
 322                                 ret = -EINVAL;
 323                                 goto frontend_err;
 324                         }
 325                         printk(KERN_INFO "tm6000: XC5000 asked to be attached to frontend!\n");
 326                         break;
 327                         }
 328                 }
 329         } else
 330                 printk(KERN_ERR "tm6000: no frontend found\n");
 331
 332         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 333                                                             | DMX_MEMORY_BASED_FILTERING;
 334         dvb->demux.priv = dev;
 335         dvb->demux.filternum = 8;
 336         dvb->demux.feednum = 8;
 337         dvb->demux.start_feed = tm6000_start_feed;
 338         dvb->demux.stop_feed = tm6000_stop_feed;
 339         dvb->demux.write_to_decoder = NULL;
 340         ret = dvb_dmx_init(&dvb->demux);
 341         if (ret < 0) {
 342                 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 343                 goto frontend_err;
 344         }
 345
 346         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 347         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 348         dvb->dmxdev.capabilities = 0;
 349
 350         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 351         if (ret < 0) {
 352                 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 353                 goto dvb_dmx_err;
 354         }
 355
 356         return 0;
 357
 358 dvb_dmx_err:
 359         dvb_dmx_release(&dvb->demux);
 360 frontend_err:
 361         if (dvb->frontend) {
 362                 dvb_unregister_frontend(dvb->frontend);
 363                 dvb_frontend_detach(dvb->frontend);
 364         }
 365 adapter_err:
 366         dvb_unregister_adapter(&dvb->adapter);
 367 err:
 368         return ret;
 369 }
 370
 371 static void unregister_dvb(struct tm6000_core *dev)
 372 {
 373         struct tm6000_dvb *dvb = dev->dvb;
 374
 375         if (dvb->bulk_urb) {
 376                 struct urb *bulk_urb = dvb->bulk_urb;
 377
 378                 kfree(bulk_urb->transfer_buffer);
 379                 bulk_urb->transfer_buffer = NULL;
 380                 usb_unlink_urb(bulk_urb);
 381                 usb_free_urb(bulk_urb);
 382         }
 383
 384 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 385         if (dvb->frontend) {
 386                 dvb_unregister_frontend(dvb->frontend);
 387                 dvb_frontend_detach(dvb->frontend);
 388         }
 389
 390         dvb_dmxdev_release(&dvb->dmxdev);
 391         dvb_dmx_release(&dvb->demux);
 392         dvb_unregister_adapter(&dvb->adapter);
 393         mutex_destroy(&dvb->mutex);
 394 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 395 }
 396
 397 static int dvb_init(struct tm6000_core *dev)
 398 {
 399         struct tm6000_dvb *dvb;
 400         int rc;
 401
 402         if (!dev)
 403                 return 0;
 404
 405         if (!dev->caps.has_dvb)
 406                 return 0;
 407
 408         if (dev->udev->speed == USB_SPEED_FULL) {
 409                 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
 410                 return 0;
 411         }
 412
 413         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 414         if (!dvb)
 415                 return -ENOMEM;
 416
 417         dev->dvb = dvb;
 418
 419         rc = register_dvb(dev);
 420         if (rc < 0) {
 421                 kfree(dvb);
 422                 dev->dvb = NULL;
 423                 return 0;
 424         }
 425
 426         return 0;
 427 }
 428
 429 static int dvb_fini(struct tm6000_core *dev)
 430 {
 431         if (!dev)
 432                 return 0;
 433
 434         if (!dev->caps.has_dvb)
 435                 return 0;
 436
 437         if (dev->dvb) {
 438                 unregister_dvb(dev);
 439                 kfree(dev->dvb);
 440                 dev->dvb = NULL;
 441         }
 442
 443         return 0;
 444 }
 445
 446 static struct tm6000_ops dvb_ops = {
 447         .type   = TM6000_DVB,
 448         .name   = "TM6000 dvb Extension",
 449         .init   = dvb_init,
 450         .fini   = dvb_fini,
 451 };
 452
 453 static int __init tm6000_dvb_register(void)
 454 {
 455         return tm6000_register_extension(&dvb_ops);
 456 }
 457
 458 static void __exit tm6000_dvb_unregister(void)
 459 {
 460         tm6000_unregister_extension(&dvb_ops);
 461 }
 462
 463 module_init(tm6000_dvb_register);
 464 module_exit(tm6000_dvb_unregister);