kernel/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                 }
 115         }
 116 }
 117
 118 static int tm6000_start_stream(struct tm6000_core *dev)
 119 {
 120         int ret;
 121         unsigned int pipe, size;
 122         struct tm6000_dvb *dvb = dev->dvb;
 123
 124         printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
 125
 126         if (dev->mode != TM6000_MODE_DIGITAL) {
 127                 tm6000_init_digital_mode(dev);
 128                 dev->mode = TM6000_MODE_DIGITAL;
 129         }
 130
 131         dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 132         if (dvb->bulk_urb == NULL) {
 133                 printk(KERN_ERR "tm6000: couldn't allocate urb\n");
 134                 return -ENOMEM;
 135         }
 136
 137         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 138                                                           & USB_ENDPOINT_NUMBER_MASK);
 139
 140         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 141         size = size * 15; /* 512 x 8 or 12 or 15 */
 142
 143         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 144         if (dvb->bulk_urb->transfer_buffer == NULL) {
 145                 usb_free_urb(dvb->bulk_urb);
 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                 return ret;
 160         } else
 161                 printk(KERN_ERR "tm6000: pipe resetted\n");
 162
 163 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 164         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 165
 166 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 167         if (ret) {
 168                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 169                                                                         ret);
 170
 171                 kfree(dvb->bulk_urb->transfer_buffer);
 172                 usb_free_urb(dvb->bulk_urb);
 173                 return ret;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static void tm6000_stop_stream(struct tm6000_core *dev)
 180 {
 181         struct tm6000_dvb *dvb = dev->dvb;
 182
 183         if (dvb->bulk_urb) {
 184                 printk(KERN_INFO "urb killing\n");
 185                 usb_kill_urb(dvb->bulk_urb);
 186                 printk(KERN_INFO "urb buffer free\n");
 187                 kfree(dvb->bulk_urb->transfer_buffer);
 188                 usb_free_urb(dvb->bulk_urb);
 189                 dvb->bulk_urb = NULL;
 190         }
 191 }
 192
 193 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 194 {
 195         struct dvb_demux *demux = feed->demux;
 196         struct tm6000_core *dev = demux->priv;
 197         struct tm6000_dvb *dvb = dev->dvb;
 198         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 199
 200         mutex_lock(&dvb->mutex);
 201         if (dvb->streams == 0) {
 202                 dvb->streams = 1;
 203 /*              mutex_init(&tm6000_dev->streming_mutex); */
 204                 tm6000_start_stream(dev);
 205         } else
 206                 ++(dvb->streams);
 207         mutex_unlock(&dvb->mutex);
 208
 209         return 0;
 210 }
 211
 212 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 213 {
 214         struct dvb_demux *demux = feed->demux;
 215         struct tm6000_core *dev = demux->priv;
 216         struct tm6000_dvb *dvb = dev->dvb;
 217
 218         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 219
 220         mutex_lock(&dvb->mutex);
 221
 222         printk(KERN_INFO "stream %#x\n", dvb->streams);
 223         --(dvb->streams);
 224         if (dvb->streams == 0) {
 225                 printk(KERN_INFO "stop stream\n");
 226                 tm6000_stop_stream(dev);
 227 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 228         }
 229         mutex_unlock(&dvb->mutex);
 230 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 231
 232         return 0;
 233 }
 234
 235 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 236 {
 237         struct tm6000_dvb *dvb = dev->dvb;
 238
 239         if (dev->caps.has_zl10353) {
 240                 struct zl10353_config config = {
 241                                      .demod_address = dev->demod_addr,
 242                                      .no_tuner = 1,
 243                                      .parallel_ts = 1,
 244                                      .if2 = 45700,
 245                                      .disable_i2c_gate_ctrl = 1,
 246                                     };
 247
 248                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 249                                                            &dev->i2c_adap);
 250         } else {
 251                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 252                 return -1;
 253         }
 254
 255         return (!dvb->frontend) ? -1 : 0;
 256 }
 257
 258 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 259
 260 static int register_dvb(struct tm6000_core *dev)
 261 {
 262         int ret = -1;
 263         struct tm6000_dvb *dvb = dev->dvb;
 264
 265         mutex_init(&dvb->mutex);
 266
 267         dvb->streams = 0;
 268
 269         /* attach the frontend */
 270         ret = tm6000_dvb_attach_frontend(dev);
 271         if (ret < 0) {
 272                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 273                 goto err;
 274         }
 275
 276         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 277                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 278         dvb->adapter.priv = dev;
 279
 280         if (dvb->frontend) {
 281                 switch (dev->tuner_type) {
 282                 case TUNER_XC2028: {
 283                         struct xc2028_config cfg = {
 284                                 .i2c_adap = &dev->i2c_adap,
 285                                 .i2c_addr = dev->tuner_addr,
 286                         };
 287
 288                         dvb->frontend->callback = tm6000_tuner_callback;
 289                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 290                         if (ret < 0) {
 291                                 printk(KERN_ERR
 292                                         "tm6000: couldn't register frontend\n");
 293                                 goto adapter_err;
 294                         }
 295
 296                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 297                                 printk(KERN_ERR "tm6000: couldn't register "
 298                                                 "frontend (xc3028)\n");
 299                                 ret = -EINVAL;
 300                                 goto frontend_err;
 301                         }
 302                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 303                                          "attached to frontend!\n");
 304                         break;
 305                         }
 306                 case TUNER_XC5000: {
 307                         struct xc5000_config cfg = {
 308                                 .i2c_address = dev->tuner_addr,
 309                         };
 310
 311                         dvb->frontend->callback = tm6000_xc5000_callback;
 312                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 313                         if (ret < 0) {
 314                                 printk(KERN_ERR
 315                                         "tm6000: couldn't register frontend\n");
 316                                 goto adapter_err;
 317                         }
 318
 319                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 320                                 printk(KERN_ERR "tm6000: couldn't register "
 321                                                 "frontend (xc5000)\n");
 322                                 ret = -EINVAL;
 323                                 goto frontend_err;
 324                         }
 325                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 326                                          "attached to frontend!\n");
 327                         break;
 328                         }
 329                 }
 330         } else
 331                 printk(KERN_ERR "tm6000: no frontend found\n");
 332
 333         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 334                                                             | DMX_MEMORY_BASED_FILTERING;
 335         dvb->demux.priv = dev;
 336         dvb->demux.filternum = 8;
 337         dvb->demux.feednum = 8;
 338         dvb->demux.start_feed = tm6000_start_feed;
 339         dvb->demux.stop_feed = tm6000_stop_feed;
 340         dvb->demux.write_to_decoder = NULL;
 341         ret = dvb_dmx_init(&dvb->demux);
 342         if (ret < 0) {
 343                 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 344                 goto frontend_err;
 345         }
 346
 347         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 348         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 349         dvb->dmxdev.capabilities = 0;
 350
 351         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 352         if (ret < 0) {
 353                 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 354                 goto dvb_dmx_err;
 355         }
 356
 357         return 0;
 358
 359 dvb_dmx_err:
 360         dvb_dmx_release(&dvb->demux);
 361 frontend_err:
 362         if (dvb->frontend) {
 363                 dvb_unregister_frontend(dvb->frontend);
 364                 dvb_frontend_detach(dvb->frontend);
 365         }
 366 adapter_err:
 367         dvb_unregister_adapter(&dvb->adapter);
 368 err:
 369         return ret;
 370 }
 371
 372 static void unregister_dvb(struct tm6000_core *dev)
 373 {
 374         struct tm6000_dvb *dvb = dev->dvb;
 375
 376         if (dvb->bulk_urb != NULL) {
 377                 struct urb *bulk_urb = dvb->bulk_urb;
 378
 379                 kfree(bulk_urb->transfer_buffer);
 380                 bulk_urb->transfer_buffer = NULL;
 381                 usb_unlink_urb(bulk_urb);
 382                 usb_free_urb(bulk_urb);
 383         }
 384
 385 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 386         if (dvb->frontend) {
 387                 dvb_unregister_frontend(dvb->frontend);
 388                 dvb_frontend_detach(dvb->frontend);
 389         }
 390
 391         dvb_dmxdev_release(&dvb->dmxdev);
 392         dvb_dmx_release(&dvb->demux);
 393         dvb_unregister_adapter(&dvb->adapter);
 394         mutex_destroy(&dvb->mutex);
 395 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 396 }
 397
 398 static int dvb_init(struct tm6000_core *dev)
 399 {
 400         struct tm6000_dvb *dvb;
 401         int rc;
 402
 403         if (!dev)
 404                 return 0;
 405
 406         if (!dev->caps.has_dvb)
 407                 return 0;
 408
 409         if (dev->udev->speed == USB_SPEED_FULL) {
 410                 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
 411                 return 0;
 412         }
 413
 414         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 415         if (!dvb) {
 416                 printk(KERN_INFO "Cannot allocate memory\n");
 417                 return -ENOMEM;
 418         }
 419
 420         dev->dvb = dvb;
 421
 422         rc = register_dvb(dev);
 423         if (rc < 0) {
 424                 kfree(dvb);
 425                 dev->dvb = NULL;
 426                 return 0;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static int dvb_fini(struct tm6000_core *dev)
 433 {
 434         if (!dev)
 435                 return 0;
 436
 437         if (!dev->caps.has_dvb)
 438                 return 0;
 439
 440         if (dev->dvb) {
 441                 unregister_dvb(dev);
 442                 kfree(dev->dvb);
 443                 dev->dvb = NULL;
 444         }
 445
 446         return 0;
 447 }
 448
 449 static struct tm6000_ops dvb_ops = {
 450         .type   = TM6000_DVB,
 451         .name   = "TM6000 dvb Extension",
 452         .init   = dvb_init,
 453         .fini   = dvb_fini,
 454 };
 455
 456 static int __init tm6000_dvb_register(void)
 457 {
 458         return tm6000_register_extension(&dvb_ops);
 459 }
 460
 461 static void __exit tm6000_dvb_unregister(void)
 462 {
 463         tm6000_unregister_extension(&dvb_ops);
 464 }
 465
 466 module_init(tm6000_dvb_register);
 467 module_exit(tm6000_dvb_unregister);