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