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                 return -ENOMEM;
 135
 136         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 137                                                           & USB_ENDPOINT_NUMBER_MASK);
 138
 139         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 140         size = size * 15; /* 512 x 8 or 12 or 15 */
 141
 142         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 143         if (dvb->bulk_urb->transfer_buffer == NULL) {
 144                 usb_free_urb(dvb->bulk_urb);
 145                 dvb->bulk_urb = NULL;
 146                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 147                 return -ENOMEM;
 148         }
 149
 150         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 151                                                  dvb->bulk_urb->transfer_buffer,
 152                                                  size,
 153                                                  tm6000_urb_received, dev);
 154
 155         ret = usb_clear_halt(dev->udev, pipe);
 156         if (ret < 0) {
 157                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 158                                                         ret, __func__);
 159
 160                 kfree(dvb->bulk_urb->transfer_buffer);
 161                 usb_free_urb(dvb->bulk_urb);
 162                 dvb->bulk_urb = NULL;
 163                 return ret;
 164         } else
 165                 printk(KERN_ERR "tm6000: pipe resetted\n");
 166
 167 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 168         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 169
 170 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 171         if (ret) {
 172                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 173                                                                         ret);
 174
 175                 kfree(dvb->bulk_urb->transfer_buffer);
 176                 usb_free_urb(dvb->bulk_urb);
 177                 dvb->bulk_urb = NULL;
 178                 return ret;
 179         }
 180
 181         return 0;
 182 }
 183
 184 static void tm6000_stop_stream(struct tm6000_core *dev)
 185 {
 186         struct tm6000_dvb *dvb = dev->dvb;
 187
 188         if (dvb->bulk_urb) {
 189                 printk(KERN_INFO "urb killing\n");
 190                 usb_kill_urb(dvb->bulk_urb);
 191                 printk(KERN_INFO "urb buffer free\n");
 192                 kfree(dvb->bulk_urb->transfer_buffer);
 193                 usb_free_urb(dvb->bulk_urb);
 194                 dvb->bulk_urb = NULL;
 195         }
 196 }
 197
 198 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 199 {
 200         struct dvb_demux *demux = feed->demux;
 201         struct tm6000_core *dev = demux->priv;
 202         struct tm6000_dvb *dvb = dev->dvb;
 203         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 204
 205         mutex_lock(&dvb->mutex);
 206         if (dvb->streams == 0) {
 207                 dvb->streams = 1;
 208 /*              mutex_init(&tm6000_dev->streming_mutex); */
 209                 tm6000_start_stream(dev);
 210         } else
 211                 ++(dvb->streams);
 212         mutex_unlock(&dvb->mutex);
 213
 214         return 0;
 215 }
 216
 217 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 218 {
 219         struct dvb_demux *demux = feed->demux;
 220         struct tm6000_core *dev = demux->priv;
 221         struct tm6000_dvb *dvb = dev->dvb;
 222
 223         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 224
 225         mutex_lock(&dvb->mutex);
 226
 227         printk(KERN_INFO "stream %#x\n", dvb->streams);
 228         --(dvb->streams);
 229         if (dvb->streams == 0) {
 230                 printk(KERN_INFO "stop stream\n");
 231                 tm6000_stop_stream(dev);
 232 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 233         }
 234         mutex_unlock(&dvb->mutex);
 235 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 236
 237         return 0;
 238 }
 239
 240 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 241 {
 242         struct tm6000_dvb *dvb = dev->dvb;
 243
 244         if (dev->caps.has_zl10353) {
 245                 struct zl10353_config config = {
 246                                      .demod_address = dev->demod_addr,
 247                                      .no_tuner = 1,
 248                                      .parallel_ts = 1,
 249                                      .if2 = 45700,
 250                                      .disable_i2c_gate_ctrl = 1,
 251                                     };
 252
 253                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 254                                                            &dev->i2c_adap);
 255         } else {
 256                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 257                 return -1;
 258         }
 259
 260         return (!dvb->frontend) ? -1 : 0;
 261 }
 262
 263 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 264
 265 static int register_dvb(struct tm6000_core *dev)
 266 {
 267         int ret = -1;
 268         struct tm6000_dvb *dvb = dev->dvb;
 269
 270         mutex_init(&dvb->mutex);
 271
 272         dvb->streams = 0;
 273
 274         /* attach the frontend */
 275         ret = tm6000_dvb_attach_frontend(dev);
 276         if (ret < 0) {
 277                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 278                 goto err;
 279         }
 280
 281         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 282                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 283         if (ret < 0) {
 284                 pr_err("tm6000: couldn't register the adapter!\n");
 285                 goto err;
 286         }
 287
 288         dvb->adapter.priv = dev;
 289
 290         if (dvb->frontend) {
 291                 switch (dev->tuner_type) {
 292                 case TUNER_XC2028: {
 293                         struct xc2028_config cfg = {
 294                                 .i2c_adap = &dev->i2c_adap,
 295                                 .i2c_addr = dev->tuner_addr,
 296                         };
 297
 298                         dvb->frontend->callback = tm6000_tuner_callback;
 299                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 300                         if (ret < 0) {
 301                                 printk(KERN_ERR
 302                                         "tm6000: couldn't register frontend\n");
 303                                 goto adapter_err;
 304                         }
 305
 306                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 307                                 printk(KERN_ERR "tm6000: couldn't register "
 308                                                 "frontend (xc3028)\n");
 309                                 ret = -EINVAL;
 310                                 goto frontend_err;
 311                         }
 312                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 313                                          "attached to frontend!\n");
 314                         break;
 315                         }
 316                 case TUNER_XC5000: {
 317                         struct xc5000_config cfg = {
 318                                 .i2c_address = dev->tuner_addr,
 319                         };
 320
 321                         dvb->frontend->callback = tm6000_xc5000_callback;
 322                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 323                         if (ret < 0) {
 324                                 printk(KERN_ERR
 325                                         "tm6000: couldn't register frontend\n");
 326                                 goto adapter_err;
 327                         }
 328
 329                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 330                                 printk(KERN_ERR "tm6000: couldn't register "
 331                                                 "frontend (xc5000)\n");
 332                                 ret = -EINVAL;
 333                                 goto frontend_err;
 334                         }
 335                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 336                                          "attached to frontend!\n");
 337                         break;
 338                         }
 339                 }
 340         } else
 341                 printk(KERN_ERR "tm6000: no frontend found\n");
 342
 343         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 344                                                             | DMX_MEMORY_BASED_FILTERING;
 345         dvb->demux.priv = dev;
 346         dvb->demux.filternum = 8;
 347         dvb->demux.feednum = 8;
 348         dvb->demux.start_feed = tm6000_start_feed;
 349         dvb->demux.stop_feed = tm6000_stop_feed;
 350         dvb->demux.write_to_decoder = NULL;
 351         ret = dvb_dmx_init(&dvb->demux);
 352         if (ret < 0) {
 353                 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 354                 goto frontend_err;
 355         }
 356
 357         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 358         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 359         dvb->dmxdev.capabilities = 0;
 360
 361         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 362         if (ret < 0) {
 363                 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 364                 goto dvb_dmx_err;
 365         }
 366
 367         return 0;
 368
 369 dvb_dmx_err:
 370         dvb_dmx_release(&dvb->demux);
 371 frontend_err:
 372         if (dvb->frontend) {
 373                 dvb_unregister_frontend(dvb->frontend);
 374                 dvb_frontend_detach(dvb->frontend);
 375         }
 376 adapter_err:
 377         dvb_unregister_adapter(&dvb->adapter);
 378 err:
 379         return ret;
 380 }
 381
 382 static void unregister_dvb(struct tm6000_core *dev)
 383 {
 384         struct tm6000_dvb *dvb = dev->dvb;
 385
 386         if (dvb->bulk_urb != NULL) {
 387                 struct urb *bulk_urb = dvb->bulk_urb;
 388
 389                 kfree(bulk_urb->transfer_buffer);
 390                 bulk_urb->transfer_buffer = NULL;
 391                 usb_unlink_urb(bulk_urb);
 392                 usb_free_urb(bulk_urb);
 393         }
 394
 395 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 396         if (dvb->frontend) {
 397                 dvb_unregister_frontend(dvb->frontend);
 398                 dvb_frontend_detach(dvb->frontend);
 399         }
 400
 401         dvb_dmxdev_release(&dvb->dmxdev);
 402         dvb_dmx_release(&dvb->demux);
 403         dvb_unregister_adapter(&dvb->adapter);
 404         mutex_destroy(&dvb->mutex);
 405 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 406 }
 407
 408 static int dvb_init(struct tm6000_core *dev)
 409 {
 410         struct tm6000_dvb *dvb;
 411         int rc;
 412
 413         if (!dev)
 414                 return 0;
 415
 416         if (!dev->caps.has_dvb)
 417                 return 0;
 418
 419         if (dev->udev->speed == USB_SPEED_FULL) {
 420                 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
 421                 return 0;
 422         }
 423
 424         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 425         if (!dvb) {
 426                 printk(KERN_INFO "Cannot allocate memory\n");
 427                 return -ENOMEM;
 428         }
 429
 430         dev->dvb = dvb;
 431
 432         rc = register_dvb(dev);
 433         if (rc < 0) {
 434                 kfree(dvb);
 435                 dev->dvb = NULL;
 436                 return 0;
 437         }
 438
 439         return 0;
 440 }
 441
 442 static int dvb_fini(struct tm6000_core *dev)
 443 {
 444         if (!dev)
 445                 return 0;
 446
 447         if (!dev->caps.has_dvb)
 448                 return 0;
 449
 450         if (dev->dvb) {
 451                 unregister_dvb(dev);
 452                 kfree(dev->dvb);
 453                 dev->dvb = NULL;
 454         }
 455
 456         return 0;
 457 }
 458
 459 static struct tm6000_ops dvb_ops = {
 460         .type   = TM6000_DVB,
 461         .name   = "TM6000 dvb Extension",
 462         .init   = dvb_init,
 463         .fini   = dvb_fini,
 464 };
 465
 466 static int __init tm6000_dvb_register(void)
 467 {
 468         return tm6000_register_extension(&dvb_ops);
 469 }
 470
 471 static void __exit tm6000_dvb_unregister(void)
 472 {
 473         tm6000_unregister_extension(&dvb_ops);
 474 }
 475
 476 module_init(tm6000_dvb_register);
 477 module_exit(tm6000_dvb_unregister);