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