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 synchronously";
  49                 break;
  50         case -ECONNRESET:
  51                 errmsg = "unlinked asynchronously";
  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)
 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) {
 137                 usb_free_urb(dvb->bulk_urb);
 138                 return -ENOMEM;
 139         }
 140
 141         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 142                                                  dvb->bulk_urb->transfer_buffer,
 143                                                  size,
 144                                                  tm6000_urb_received, dev);
 145
 146         ret = usb_clear_halt(dev->udev, pipe);
 147         if (ret < 0) {
 148                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 149                                                         ret, __func__);
 150                 return ret;
 151         } else
 152                 printk(KERN_ERR "tm6000: pipe resetted\n");
 153
 154 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 155         ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
 156
 157 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 158         if (ret) {
 159                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 160                                                                         ret);
 161
 162                 kfree(dvb->bulk_urb->transfer_buffer);
 163                 usb_free_urb(dvb->bulk_urb);
 164                 return ret;
 165         }
 166
 167         return 0;
 168 }
 169
 170 static void tm6000_stop_stream(struct tm6000_core *dev)
 171 {
 172         struct tm6000_dvb *dvb = dev->dvb;
 173
 174         if (dvb->bulk_urb) {
 175                 printk(KERN_INFO "urb killing\n");
 176                 usb_kill_urb(dvb->bulk_urb);
 177                 printk(KERN_INFO "urb buffer free\n");
 178                 kfree(dvb->bulk_urb->transfer_buffer);
 179                 usb_free_urb(dvb->bulk_urb);
 180                 dvb->bulk_urb = NULL;
 181         }
 182 }
 183
 184 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 185 {
 186         struct dvb_demux *demux = feed->demux;
 187         struct tm6000_core *dev = demux->priv;
 188         struct tm6000_dvb *dvb = dev->dvb;
 189         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 190
 191         mutex_lock(&dvb->mutex);
 192         if (dvb->streams == 0) {
 193                 dvb->streams = 1;
 194 /*              mutex_init(&tm6000_dev->streming_mutex); */
 195                 tm6000_start_stream(dev);
 196         } else
 197                 ++(dvb->streams);
 198         mutex_unlock(&dvb->mutex);
 199
 200         return 0;
 201 }
 202
 203 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 204 {
 205         struct dvb_demux *demux = feed->demux;
 206         struct tm6000_core *dev = demux->priv;
 207         struct tm6000_dvb *dvb = dev->dvb;
 208
 209         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 210
 211         mutex_lock(&dvb->mutex);
 212
 213         printk(KERN_INFO "stream %#x\n", dvb->streams);
 214         --(dvb->streams);
 215         if (dvb->streams == 0) {
 216                 printk(KERN_INFO "stop stream\n");
 217                 tm6000_stop_stream(dev);
 218 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 219         }
 220         mutex_unlock(&dvb->mutex);
 221 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 222
 223         return 0;
 224 }
 225
 226 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 227 {
 228         struct tm6000_dvb *dvb = dev->dvb;
 229
 230         if (dev->caps.has_zl10353) {
 231                 struct zl10353_config config = {
 232                                      .demod_address = dev->demod_addr,
 233                                      .no_tuner = 1,
 234                                      .parallel_ts = 1,
 235                                      .if2 = 45700,
 236                                      .disable_i2c_gate_ctrl = 1,
 237                                     };
 238
 239                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 240                                                            &dev->i2c_adap);
 241         } else {
 242                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 243                 return -1;
 244         }
 245
 246         return (!dvb->frontend) ? -1 : 0;
 247 }
 248
 249 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 250
 251 static int register_dvb(struct tm6000_core *dev)
 252 {
 253         int ret = -1;
 254         struct tm6000_dvb *dvb = dev->dvb;
 255
 256         mutex_init(&dvb->mutex);
 257
 258         dvb->streams = 0;
 259
 260         /* attach the frontend */
 261         ret = tm6000_dvb_attach_frontend(dev);
 262         if (ret < 0) {
 263                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 264                 goto err;
 265         }
 266
 267         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 268                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 269         if (ret < 0) {
 270                 pr_err("tm6000: couldn't register the adapter!\n");
 271                 goto err;
 272         }
 273
 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) {
 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                 return -ENOMEM;
 409
 410         dev->dvb = dvb;
 411
 412         rc = register_dvb(dev);
 413         if (rc < 0) {
 414                 kfree(dvb);
 415                 dev->dvb = NULL;
 416                 return 0;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int dvb_fini(struct tm6000_core *dev)
 423 {
 424         if (!dev)
 425                 return 0;
 426
 427         if (!dev->caps.has_dvb)
 428                 return 0;
 429
 430         if (dev->dvb) {
 431                 unregister_dvb(dev);
 432                 kfree(dev->dvb);
 433                 dev->dvb = NULL;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static struct tm6000_ops dvb_ops = {
 440         .type   = TM6000_DVB,
 441         .name   = "TM6000 dvb Extension",
 442         .init   = dvb_init,
 443         .fini   = dvb_fini,
 444 };
 445
 446 static int __init tm6000_dvb_register(void)
 447 {
 448         return tm6000_register_extension(&dvb_ops);
 449 }
 450
 451 static void __exit tm6000_dvb_unregister(void)
 452 {
 453         tm6000_unregister_extension(&dvb_ops);
 454 }
 455
 456 module_init(tm6000_dvb_register);
 457 module_exit(tm6000_dvb_unregister);