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  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22 #include <linux/usb.h>
  23
  24 #include "tm6000.h"
  25 #include "tm6000-regs.h"
  26
  27 #include "zl10353.h"
  28
  29 #include <media/tuner.h>
  30
  31 #include "tuner-xc2028.h"
  32 #include "xc5000.h"
  33
  34 MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
  35 MODULE_AUTHOR("Mauro Carvalho Chehab");
  36 MODULE_LICENSE("GPL");
  37
  38 MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},"
  39                         "{{Trident, tm6000},"
  40                         "{{Trident, tm6010}");
  41
  42 static int debug;
  43
  44 module_param(debug, int, 0644);
  45 MODULE_PARM_DESC(debug, "enable debug message");
  46
  47 static inline void print_err_status(struct tm6000_core *dev,
  48                                     int packet, int status)
  49 {
  50         char *errmsg = "Unknown";
  51
  52         switch (status) {
  53         case -ENOENT:
  54                 errmsg = "unlinked synchronuously";
  55                 break;
  56         case -ECONNRESET:
  57                 errmsg = "unlinked asynchronuously";
  58                 break;
  59         case -ENOSR:
  60                 errmsg = "Buffer error (overrun)";
  61                 break;
  62         case -EPIPE:
  63                 errmsg = "Stalled (device not responding)";
  64                 break;
  65         case -EOVERFLOW:
  66                 errmsg = "Babble (bad cable?)";
  67                 break;
  68         case -EPROTO:
  69                 errmsg = "Bit-stuff error (bad cable?)";
  70                 break;
  71         case -EILSEQ:
  72                 errmsg = "CRC/Timeout (could be anything)";
  73                 break;
  74         case -ETIME:
  75                 errmsg = "Device does not respond";
  76                 break;
  77         }
  78         if (packet < 0) {
  79                 dprintk(dev, 1, "URB status %d [%s].\n",
  80                         status, errmsg);
  81         } else {
  82                 dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
  83                         packet, status, errmsg);
  84         }
  85 }
  86
  87 static void tm6000_urb_received(struct urb *urb)
  88 {
  89         int ret;
  90         struct tm6000_core *dev = urb->context;
  91
  92         switch (urb->status) {
  93         case 0:
  94         case -ETIMEDOUT:
  95                 break;
  96         case -ENOENT:
  97         case -ECONNRESET:
  98         case -ESHUTDOWN:
  99                 return;
 100         default:
 101                 print_err_status(dev, 0, urb->status);
 102         }
 103
 104         if (urb->actual_length > 0)
 105                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
 106                                                    urb->actual_length);
 107
 108         if (dev->dvb->streams > 0) {
 109                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 110                 if (ret < 0) {
 111                         printk(KERN_ERR "tm6000:  error %s\n", __func__);
 112                         kfree(urb->transfer_buffer);
 113                         usb_free_urb(urb);
 114                         dev->dvb->bulk_urb = NULL;
 115                 }
 116         }
 117 }
 118
 119 static int tm6000_start_stream(struct tm6000_core *dev)
 120 {
 121         int ret;
 122         unsigned int pipe, size;
 123         struct tm6000_dvb *dvb = dev->dvb;
 124
 125         printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
 126
 127         if (dev->mode != TM6000_MODE_DIGITAL) {
 128                 tm6000_init_digital_mode(dev);
 129                 dev->mode = TM6000_MODE_DIGITAL;
 130         }
 131
 132         dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 133         if (dvb->bulk_urb == NULL) {
 134                 printk(KERN_ERR "tm6000: couldn't allocate urb\n");
 135                 return -ENOMEM;
 136         }
 137
 138         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 139                                                           & USB_ENDPOINT_NUMBER_MASK);
 140
 141         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 142         size = size * 15; /* 512 x 8 or 12 or 15 */
 143
 144         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 145         if (dvb->bulk_urb->transfer_buffer == NULL) {
 146                 usb_free_urb(dvb->bulk_urb);
 147                 dvb->bulk_urb = NULL;
 148                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 149                 return -ENOMEM;
 150         }
 151
 152         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 153                                                  dvb->bulk_urb->transfer_buffer,
 154                                                  size,
 155                                                  tm6000_urb_received, dev);
 156
 157         ret = usb_clear_halt(dev->udev, pipe);
 158         if (ret < 0) {
 159                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 160                                                         ret, __func__);
 161
 162                 kfree(dvb->bulk_urb->transfer_buffer);
 163                 usb_free_urb(dvb->bulk_urb);
 164                 dvb->bulk_urb = NULL;
 165                 return ret;
 166         } else
 167                 printk(KERN_ERR "tm6000: pipe resetted\n");
 168
 169 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 170         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 171
 172 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 173         if (ret) {
 174                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 175                                                                         ret);
 176
 177                 kfree(dvb->bulk_urb->transfer_buffer);
 178                 usb_free_urb(dvb->bulk_urb);
 179                 dvb->bulk_urb = NULL;
 180                 return ret;
 181         }
 182
 183         return 0;
 184 }
 185
 186 static void tm6000_stop_stream(struct tm6000_core *dev)
 187 {
 188         struct tm6000_dvb *dvb = dev->dvb;
 189
 190         if (dvb->bulk_urb) {
 191                 printk(KERN_INFO "urb killing\n");
 192                 usb_kill_urb(dvb->bulk_urb);
 193                 printk(KERN_INFO "urb buffer free\n");
 194                 kfree(dvb->bulk_urb->transfer_buffer);
 195                 usb_free_urb(dvb->bulk_urb);
 196                 dvb->bulk_urb = NULL;
 197         }
 198 }
 199
 200 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 201 {
 202         struct dvb_demux *demux = feed->demux;
 203         struct tm6000_core *dev = demux->priv;
 204         struct tm6000_dvb *dvb = dev->dvb;
 205         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 206
 207         mutex_lock(&dvb->mutex);
 208         if (dvb->streams == 0) {
 209                 dvb->streams = 1;
 210 /*              mutex_init(&tm6000_dev->streming_mutex); */
 211                 tm6000_start_stream(dev);
 212         } else
 213                 ++(dvb->streams);
 214         mutex_unlock(&dvb->mutex);
 215
 216         return 0;
 217 }
 218
 219 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 220 {
 221         struct dvb_demux *demux = feed->demux;
 222         struct tm6000_core *dev = demux->priv;
 223         struct tm6000_dvb *dvb = dev->dvb;
 224
 225         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 226
 227         mutex_lock(&dvb->mutex);
 228
 229         printk(KERN_INFO "stream %#x\n", dvb->streams);
 230         --(dvb->streams);
 231         if (dvb->streams == 0) {
 232                 printk(KERN_INFO "stop stream\n");
 233                 tm6000_stop_stream(dev);
 234 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 235         }
 236         mutex_unlock(&dvb->mutex);
 237 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 238
 239         return 0;
 240 }
 241
 242 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 243 {
 244         struct tm6000_dvb *dvb = dev->dvb;
 245
 246         if (dev->caps.has_zl10353) {
 247                 struct zl10353_config config = {
 248                                      .demod_address = dev->demod_addr,
 249                                      .no_tuner = 1,
 250                                      .parallel_ts = 1,
 251                                      .if2 = 45700,
 252                                      .disable_i2c_gate_ctrl = 1,
 253                                     };
 254
 255                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 256                                                            &dev->i2c_adap);
 257         } else {
 258                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 259                 return -1;
 260         }
 261
 262         return (!dvb->frontend) ? -1 : 0;
 263 }
 264
 265 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 266
 267 static int register_dvb(struct tm6000_core *dev)
 268 {
 269         int ret = -1;
 270         struct tm6000_dvb *dvb = dev->dvb;
 271
 272         mutex_init(&dvb->mutex);
 273
 274         dvb->streams = 0;
 275
 276         /* attach the frontend */
 277         ret = tm6000_dvb_attach_frontend(dev);
 278         if (ret < 0) {
 279                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 280                 goto err;
 281         }
 282
 283         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 284                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 285         if (ret < 0) {
 286                 pr_err("tm6000: couldn't register the adapter!\n");
 287                 goto err;
 288         }
 289
 290         dvb->adapter.priv = dev;
 291
 292         if (dvb->frontend) {
 293                 switch (dev->tuner_type) {
 294                 case TUNER_XC2028: {
 295                         struct xc2028_config cfg = {
 296                                 .i2c_adap = &dev->i2c_adap,
 297                                 .i2c_addr = dev->tuner_addr,
 298                         };
 299
 300                         dvb->frontend->callback = tm6000_tuner_callback;
 301                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 302                         if (ret < 0) {
 303                                 printk(KERN_ERR
 304                                         "tm6000: couldn't register frontend\n");
 305                                 goto adapter_err;
 306                         }
 307
 308                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 309                                 printk(KERN_ERR "tm6000: couldn't register "
 310                                                 "frontend (xc3028)\n");
 311                                 ret = -EINVAL;
 312                                 goto frontend_err;
 313                         }
 314                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 315                                          "attached to frontend!\n");
 316                         break;
 317                         }
 318                 case TUNER_XC5000: {
 319                         struct xc5000_config cfg = {
 320                                 .i2c_address = dev->tuner_addr,
 321                         };
 322
 323                         dvb->frontend->callback = tm6000_xc5000_callback;
 324                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 325                         if (ret < 0) {
 326                                 printk(KERN_ERR
 327                                         "tm6000: couldn't register frontend\n");
 328                                 goto adapter_err;
 329                         }
 330
 331                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 332                                 printk(KERN_ERR "tm6000: couldn't register "
 333                                                 "frontend (xc5000)\n");
 334                                 ret = -EINVAL;
 335                                 goto frontend_err;
 336                         }
 337                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 338                                          "attached to frontend!\n");
 339                         break;
 340                         }
 341                 }
 342         } else
 343                 printk(KERN_ERR "tm6000: no frontend found\n");
 344
 345         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 346                                                             | DMX_MEMORY_BASED_FILTERING;
 347         dvb->demux.priv = dev;
 348         dvb->demux.filternum = 8;
 349         dvb->demux.feednum = 8;
 350         dvb->demux.start_feed = tm6000_start_feed;
 351         dvb->demux.stop_feed = tm6000_stop_feed;
 352         dvb->demux.write_to_decoder = NULL;
 353         ret = dvb_dmx_init(&dvb->demux);
 354         if (ret < 0) {
 355                 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 356                 goto frontend_err;
 357         }
 358
 359         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 360         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 361         dvb->dmxdev.capabilities = 0;
 362
 363         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 364         if (ret < 0) {
 365                 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 366                 goto dvb_dmx_err;
 367         }
 368
 369         return 0;
 370
 371 dvb_dmx_err:
 372         dvb_dmx_release(&dvb->demux);
 373 frontend_err:
 374         if (dvb->frontend) {
 375                 dvb_unregister_frontend(dvb->frontend);
 376                 dvb_frontend_detach(dvb->frontend);
 377         }
 378 adapter_err:
 379         dvb_unregister_adapter(&dvb->adapter);
 380 err:
 381         return ret;
 382 }
 383
 384 static void unregister_dvb(struct tm6000_core *dev)
 385 {
 386         struct tm6000_dvb *dvb = dev->dvb;
 387
 388         if (dvb->bulk_urb != NULL) {
 389                 struct urb *bulk_urb = dvb->bulk_urb;
 390
 391                 kfree(bulk_urb->transfer_buffer);
 392                 bulk_urb->transfer_buffer = NULL;
 393                 usb_unlink_urb(bulk_urb);
 394                 usb_free_urb(bulk_urb);
 395         }
 396
 397 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 398         if (dvb->frontend) {
 399                 dvb_unregister_frontend(dvb->frontend);
 400                 dvb_frontend_detach(dvb->frontend);
 401         }
 402
 403         dvb_dmxdev_release(&dvb->dmxdev);
 404         dvb_dmx_release(&dvb->demux);
 405         dvb_unregister_adapter(&dvb->adapter);
 406         mutex_destroy(&dvb->mutex);
 407 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 408 }
 409
 410 static int dvb_init(struct tm6000_core *dev)
 411 {
 412         struct tm6000_dvb *dvb;
 413         int rc;
 414
 415         if (!dev)
 416                 return 0;
 417
 418         if (!dev->caps.has_dvb)
 419                 return 0;
 420
 421         if (dev->udev->speed == USB_SPEED_FULL) {
 422                 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
 423                 return 0;
 424         }
 425
 426         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 427         if (!dvb) {
 428                 printk(KERN_INFO "Cannot allocate memory\n");
 429                 return -ENOMEM;
 430         }
 431
 432         dev->dvb = dvb;
 433
 434         rc = register_dvb(dev);
 435         if (rc < 0) {
 436                 kfree(dvb);
 437                 dev->dvb = NULL;
 438                 return 0;
 439         }
 440
 441         return 0;
 442 }
 443
 444 static int dvb_fini(struct tm6000_core *dev)
 445 {
 446         if (!dev)
 447                 return 0;
 448
 449         if (!dev->caps.has_dvb)
 450                 return 0;
 451
 452         if (dev->dvb) {
 453                 unregister_dvb(dev);
 454                 kfree(dev->dvb);
 455                 dev->dvb = NULL;
 456         }
 457
 458         return 0;
 459 }
 460
 461 static struct tm6000_ops dvb_ops = {
 462         .type   = TM6000_DVB,
 463         .name   = "TM6000 dvb Extension",
 464         .init   = dvb_init,
 465         .fini   = dvb_fini,
 466 };
 467
 468 static int __init tm6000_dvb_register(void)
 469 {
 470         return tm6000_register_extension(&dvb_ops);
 471 }
 472
 473 static void __exit tm6000_dvb_unregister(void)
 474 {
 475         tm6000_unregister_extension(&dvb_ops);
 476 }
 477
 478 module_init(tm6000_dvb_register);
 479 module_exit(tm6000_dvb_unregister);