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 synchronuously";
  49                 break;
  50         case -ECONNRESET:
  51                 errmsg = "unlinked asynchronuously";
  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 == NULL)
 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 == NULL) {
 138                 usb_free_urb(dvb->bulk_urb);
 139                 dvb->bulk_urb = NULL;
 140                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 141                 return -ENOMEM;
 142         }
 143
 144         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 145                                                  dvb->bulk_urb->transfer_buffer,
 146                                                  size,
 147                                                  tm6000_urb_received, dev);
 148
 149         ret = usb_clear_halt(dev->udev, pipe);
 150         if (ret < 0) {
 151                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 152                                                         ret, __func__);
 153
 154                 kfree(dvb->bulk_urb->transfer_buffer);
 155                 usb_free_urb(dvb->bulk_urb);
 156                 dvb->bulk_urb = NULL;
 157                 return ret;
 158         } else
 159                 printk(KERN_ERR "tm6000: pipe resetted\n");
 160
 161 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 162         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 163
 164 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 165         if (ret) {
 166                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 167                                                                         ret);
 168
 169                 kfree(dvb->bulk_urb->transfer_buffer);
 170                 usb_free_urb(dvb->bulk_urb);
 171                 dvb->bulk_urb = NULL;
 172                 return ret;
 173         }
 174
 175         return 0;
 176 }
 177
 178 static void tm6000_stop_stream(struct tm6000_core *dev)
 179 {
 180         struct tm6000_dvb *dvb = dev->dvb;
 181
 182         if (dvb->bulk_urb) {
 183                 printk(KERN_INFO "urb killing\n");
 184                 usb_kill_urb(dvb->bulk_urb);
 185                 printk(KERN_INFO "urb buffer free\n");
 186                 kfree(dvb->bulk_urb->transfer_buffer);
 187                 usb_free_urb(dvb->bulk_urb);
 188                 dvb->bulk_urb = NULL;
 189         }
 190 }
 191
 192 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 193 {
 194         struct dvb_demux *demux = feed->demux;
 195         struct tm6000_core *dev = demux->priv;
 196         struct tm6000_dvb *dvb = dev->dvb;
 197         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 198
 199         mutex_lock(&dvb->mutex);
 200         if (dvb->streams == 0) {
 201                 dvb->streams = 1;
 202 /*              mutex_init(&tm6000_dev->streming_mutex); */
 203                 tm6000_start_stream(dev);
 204         } else
 205                 ++(dvb->streams);
 206         mutex_unlock(&dvb->mutex);
 207
 208         return 0;
 209 }
 210
 211 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 212 {
 213         struct dvb_demux *demux = feed->demux;
 214         struct tm6000_core *dev = demux->priv;
 215         struct tm6000_dvb *dvb = dev->dvb;
 216
 217         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 218
 219         mutex_lock(&dvb->mutex);
 220
 221         printk(KERN_INFO "stream %#x\n", dvb->streams);
 222         --(dvb->streams);
 223         if (dvb->streams == 0) {
 224                 printk(KERN_INFO "stop stream\n");
 225                 tm6000_stop_stream(dev);
 226 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 227         }
 228         mutex_unlock(&dvb->mutex);
 229 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 230
 231         return 0;
 232 }
 233
 234 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 235 {
 236         struct tm6000_dvb *dvb = dev->dvb;
 237
 238         if (dev->caps.has_zl10353) {
 239                 struct zl10353_config config = {
 240                                      .demod_address = dev->demod_addr,
 241                                      .no_tuner = 1,
 242                                      .parallel_ts = 1,
 243                                      .if2 = 45700,
 244                                      .disable_i2c_gate_ctrl = 1,
 245                                     };
 246
 247                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 248                                                            &dev->i2c_adap);
 249         } else {
 250                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 251                 return -1;
 252         }
 253
 254         return (!dvb->frontend) ? -1 : 0;
 255 }
 256
 257 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 258
 259 static int register_dvb(struct tm6000_core *dev)
 260 {
 261         int ret = -1;
 262         struct tm6000_dvb *dvb = dev->dvb;
 263
 264         mutex_init(&dvb->mutex);
 265
 266         dvb->streams = 0;
 267
 268         /* attach the frontend */
 269         ret = tm6000_dvb_attach_frontend(dev);
 270         if (ret < 0) {
 271                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 272                 goto err;
 273         }
 274
 275         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 276                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 277         if (ret < 0) {
 278                 pr_err("tm6000: couldn't register the adapter!\n");
 279                 goto err;
 280         }
 281
 282         dvb->adapter.priv = dev;
 283
 284         if (dvb->frontend) {
 285                 switch (dev->tuner_type) {
 286                 case TUNER_XC2028: {
 287                         struct xc2028_config cfg = {
 288                                 .i2c_adap = &dev->i2c_adap,
 289                                 .i2c_addr = dev->tuner_addr,
 290                         };
 291
 292                         dvb->frontend->callback = tm6000_tuner_callback;
 293                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 294                         if (ret < 0) {
 295                                 printk(KERN_ERR
 296                                         "tm6000: couldn't register frontend\n");
 297                                 goto adapter_err;
 298                         }
 299
 300                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 301                                 printk(KERN_ERR "tm6000: couldn't register frontend (xc3028)\n");
 302                                 ret = -EINVAL;
 303                                 goto frontend_err;
 304                         }
 305                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be attached to frontend!\n");
 306                         break;
 307                         }
 308                 case TUNER_XC5000: {
 309                         struct xc5000_config cfg = {
 310                                 .i2c_address = dev->tuner_addr,
 311                         };
 312
 313                         dvb->frontend->callback = tm6000_xc5000_callback;
 314                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 315                         if (ret < 0) {
 316                                 printk(KERN_ERR
 317                                         "tm6000: couldn't register frontend\n");
 318                                 goto adapter_err;
 319                         }
 320
 321                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 322                                 printk(KERN_ERR "tm6000: couldn't register frontend (xc5000)\n");
 323                                 ret = -EINVAL;
 324                                 goto frontend_err;
 325                         }
 326                         printk(KERN_INFO "tm6000: XC5000 asked to be 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);