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