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                 return -ENOMEM;
 134
 135         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 136                                                           & USB_ENDPOINT_NUMBER_MASK);
 137
 138         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 139         size = size * 15; /* 512 x 8 or 12 or 15 */
 140
 141         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 142         if (dvb->bulk_urb->transfer_buffer == NULL) {
 143                 usb_free_urb(dvb->bulk_urb);
 144                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 145                 return -ENOMEM;
 146         }
 147
 148         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 149                                                  dvb->bulk_urb->transfer_buffer,
 150                                                  size,
 151                                                  tm6000_urb_received, dev);
 152
 153         ret = usb_clear_halt(dev->udev, pipe);
 154         if (ret < 0) {
 155                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 156                                                         ret, __func__);
 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                 return ret;
 172         }
 173
 174         return 0;
 175 }
 176
 177 static void tm6000_stop_stream(struct tm6000_core *dev)
 178 {
 179         struct tm6000_dvb *dvb = dev->dvb;
 180
 181         if (dvb->bulk_urb) {
 182                 printk(KERN_INFO "urb killing\n");
 183                 usb_kill_urb(dvb->bulk_urb);
 184                 printk(KERN_INFO "urb buffer free\n");
 185                 kfree(dvb->bulk_urb->transfer_buffer);
 186                 usb_free_urb(dvb->bulk_urb);
 187                 dvb->bulk_urb = NULL;
 188         }
 189 }
 190
 191 static int tm6000_start_feed(struct dvb_demux_feed *feed)
 192 {
 193         struct dvb_demux *demux = feed->demux;
 194         struct tm6000_core *dev = demux->priv;
 195         struct tm6000_dvb *dvb = dev->dvb;
 196         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 197
 198         mutex_lock(&dvb->mutex);
 199         if (dvb->streams == 0) {
 200                 dvb->streams = 1;
 201 /*              mutex_init(&tm6000_dev->streming_mutex); */
 202                 tm6000_start_stream(dev);
 203         } else
 204                 ++(dvb->streams);
 205         mutex_unlock(&dvb->mutex);
 206
 207         return 0;
 208 }
 209
 210 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
 211 {
 212         struct dvb_demux *demux = feed->demux;
 213         struct tm6000_core *dev = demux->priv;
 214         struct tm6000_dvb *dvb = dev->dvb;
 215
 216         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 217
 218         mutex_lock(&dvb->mutex);
 219
 220         printk(KERN_INFO "stream %#x\n", dvb->streams);
 221         --(dvb->streams);
 222         if (dvb->streams == 0) {
 223                 printk(KERN_INFO "stop stream\n");
 224                 tm6000_stop_stream(dev);
 225 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 226         }
 227         mutex_unlock(&dvb->mutex);
 228 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 229
 230         return 0;
 231 }
 232
 233 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 234 {
 235         struct tm6000_dvb *dvb = dev->dvb;
 236
 237         if (dev->caps.has_zl10353) {
 238                 struct zl10353_config config = {
 239                                      .demod_address = dev->demod_addr,
 240                                      .no_tuner = 1,
 241                                      .parallel_ts = 1,
 242                                      .if2 = 45700,
 243                                      .disable_i2c_gate_ctrl = 1,
 244                                     };
 245
 246                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 247                                                            &dev->i2c_adap);
 248         } else {
 249                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 250                 return -1;
 251         }
 252
 253         return (!dvb->frontend) ? -1 : 0;
 254 }
 255
 256 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 257
 258 static int register_dvb(struct tm6000_core *dev)
 259 {
 260         int ret = -1;
 261         struct tm6000_dvb *dvb = dev->dvb;
 262
 263         mutex_init(&dvb->mutex);
 264
 265         dvb->streams = 0;
 266
 267         /* attach the frontend */
 268         ret = tm6000_dvb_attach_frontend(dev);
 269         if (ret < 0) {
 270                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 271                 goto err;
 272         }
 273
 274         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 275                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 276         dvb->adapter.priv = dev;
 277
 278         if (dvb->frontend) {
 279                 switch (dev->tuner_type) {
 280                 case TUNER_XC2028: {
 281                         struct xc2028_config cfg = {
 282                                 .i2c_adap = &dev->i2c_adap,
 283                                 .i2c_addr = dev->tuner_addr,
 284                         };
 285
 286                         dvb->frontend->callback = tm6000_tuner_callback;
 287                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 288                         if (ret < 0) {
 289                                 printk(KERN_ERR
 290                                         "tm6000: couldn't register frontend\n");
 291                                 goto adapter_err;
 292                         }
 293
 294                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 295                                 printk(KERN_ERR "tm6000: couldn't register "
 296                                                 "frontend (xc3028)\n");
 297                                 ret = -EINVAL;
 298                                 goto frontend_err;
 299                         }
 300                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 301                                          "attached to frontend!\n");
 302                         break;
 303                         }
 304                 case TUNER_XC5000: {
 305                         struct xc5000_config cfg = {
 306                                 .i2c_address = dev->tuner_addr,
 307                         };
 308
 309                         dvb->frontend->callback = tm6000_xc5000_callback;
 310                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 311                         if (ret < 0) {
 312                                 printk(KERN_ERR
 313                                         "tm6000: couldn't register frontend\n");
 314                                 goto adapter_err;
 315                         }
 316
 317                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 318                                 printk(KERN_ERR "tm6000: couldn't register "
 319                                                 "frontend (xc5000)\n");
 320                                 ret = -EINVAL;
 321                                 goto frontend_err;
 322                         }
 323                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 324                                          "attached to frontend!\n");
 325                         break;
 326                         }
 327                 }
 328         } else
 329                 printk(KERN_ERR "tm6000: no frontend found\n");
 330
 331         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 332                                                             | DMX_MEMORY_BASED_FILTERING;
 333         dvb->demux.priv = dev;
 334         dvb->demux.filternum = 8;
 335         dvb->demux.feednum = 8;
 336         dvb->demux.start_feed = tm6000_start_feed;
 337         dvb->demux.stop_feed = tm6000_stop_feed;
 338         dvb->demux.write_to_decoder = NULL;
 339         ret = dvb_dmx_init(&dvb->demux);
 340         if (ret < 0) {
 341                 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 342                 goto frontend_err;
 343         }
 344
 345         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 346         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 347         dvb->dmxdev.capabilities = 0;
 348
 349         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 350         if (ret < 0) {
 351                 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 352                 goto dvb_dmx_err;
 353         }
 354
 355         return 0;
 356
 357 dvb_dmx_err:
 358         dvb_dmx_release(&dvb->demux);
 359 frontend_err:
 360         if (dvb->frontend) {
 361                 dvb_unregister_frontend(dvb->frontend);
 362                 dvb_frontend_detach(dvb->frontend);
 363         }
 364 adapter_err:
 365         dvb_unregister_adapter(&dvb->adapter);
 366 err:
 367         return ret;
 368 }
 369
 370 static void unregister_dvb(struct tm6000_core *dev)
 371 {
 372         struct tm6000_dvb *dvb = dev->dvb;
 373
 374         if (dvb->bulk_urb != NULL) {
 375                 struct urb *bulk_urb = dvb->bulk_urb;
 376
 377                 kfree(bulk_urb->transfer_buffer);
 378                 bulk_urb->transfer_buffer = NULL;
 379                 usb_unlink_urb(bulk_urb);
 380                 usb_free_urb(bulk_urb);
 381         }
 382
 383 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 384         if (dvb->frontend) {
 385                 dvb_unregister_frontend(dvb->frontend);
 386                 dvb_frontend_detach(dvb->frontend);
 387         }
 388
 389         dvb_dmxdev_release(&dvb->dmxdev);
 390         dvb_dmx_release(&dvb->demux);
 391         dvb_unregister_adapter(&dvb->adapter);
 392         mutex_destroy(&dvb->mutex);
 393 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 394 }
 395
 396 static int dvb_init(struct tm6000_core *dev)
 397 {
 398         struct tm6000_dvb *dvb;
 399         int rc;
 400
 401         if (!dev)
 402                 return 0;
 403
 404         if (!dev->caps.has_dvb)
 405                 return 0;
 406
 407         if (dev->udev->speed == USB_SPEED_FULL) {
 408                 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
 409                 return 0;
 410         }
 411
 412         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 413         if (!dvb) {
 414                 printk(KERN_INFO "Cannot allocate memory\n");
 415                 return -ENOMEM;
 416         }
 417
 418         dev->dvb = dvb;
 419
 420         rc = register_dvb(dev);
 421         if (rc < 0) {
 422                 kfree(dvb);
 423                 dev->dvb = NULL;
 424                 return 0;
 425         }
 426
 427         return 0;
 428 }
 429
 430 static int dvb_fini(struct tm6000_core *dev)
 431 {
 432         if (!dev)
 433                 return 0;
 434
 435         if (!dev->caps.has_dvb)
 436                 return 0;
 437
 438         if (dev->dvb) {
 439                 unregister_dvb(dev);
 440                 kfree(dev->dvb);
 441                 dev->dvb = NULL;
 442         }
 443
 444         return 0;
 445 }
 446
 447 static struct tm6000_ops dvb_ops = {
 448         .type   = TM6000_DVB,
 449         .name   = "TM6000 dvb Extension",
 450         .init   = dvb_init,
 451         .fini   = dvb_fini,
 452 };
 453
 454 static int __init tm6000_dvb_register(void)
 455 {
 456         return tm6000_register_extension(&dvb_ops);
 457 }
 458
 459 static void __exit tm6000_dvb_unregister(void)
 460 {
 461         tm6000_unregister_extension(&dvb_ops);
 462 }
 463
 464 module_init(tm6000_dvb_register);
 465 module_exit(tm6000_dvb_unregister);