drivers/staging/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 <mchehab@redhat.com>");
  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         if (urb->status != 0)
  93                 print_err_status(dev, 0, urb->status);
  94         else if (urb->actual_length > 0)
  95                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
  96                                                    urb->actual_length);
  97
  98         if (dev->dvb->streams > 0) {
  99                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 100                 if (ret < 0) {
 101                         printk(KERN_ERR "tm6000:  error %s\n", __func__);
 102                         kfree(urb->transfer_buffer);
 103                         usb_free_urb(urb);
 104                 }
 105         }
 106 }
 107
 108 int tm6000_start_stream(struct tm6000_core *dev)
 109 {
 110         int ret;
 111         unsigned int pipe, size;
 112         struct tm6000_dvb *dvb = dev->dvb;
 113
 114         printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
 115
 116         if (dev->mode != TM6000_MODE_DIGITAL) {
 117                 tm6000_init_digital_mode(dev);
 118                 dev->mode = TM6000_MODE_DIGITAL;
 119         }
 120
 121         dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 122         if (dvb->bulk_urb == NULL) {
 123                 printk(KERN_ERR "tm6000: couldn't allocate urb\n");
 124                 return -ENOMEM;
 125         }
 126
 127         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 128                                                           & USB_ENDPOINT_NUMBER_MASK);
 129
 130         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 131         size = size * 15; /* 512 x 8 or 12 or 15 */
 132
 133         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 134         if (dvb->bulk_urb->transfer_buffer == NULL) {
 135                 usb_free_urb(dvb->bulk_urb);
 136                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 137                 return -ENOMEM;
 138         }
 139
 140         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 141                                                  dvb->bulk_urb->transfer_buffer,
 142                                                  size,
 143                                                  tm6000_urb_received, dev);
 144
 145         ret = usb_clear_halt(dev->udev, pipe);
 146         if (ret < 0) {
 147                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
 148                                                         ret, __func__);
 149                 return ret;
 150         } else
 151                 printk(KERN_ERR "tm6000: pipe resetted\n");
 152
 153 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 154         ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);
 155
 156 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 157         if (ret) {
 158                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
 159                                                                         ret);
 160
 161                 kfree(dvb->bulk_urb->transfer_buffer);
 162                 usb_free_urb(dvb->bulk_urb);
 163                 return ret;
 164         }
 165
 166         return 0;
 167 }
 168
 169 void tm6000_stop_stream(struct tm6000_core *dev)
 170 {
 171         struct tm6000_dvb *dvb = dev->dvb;
 172
 173         if (dvb->bulk_urb) {
 174                 printk(KERN_INFO "urb killing\n");
 175                 usb_kill_urb(dvb->bulk_urb);
 176                 printk(KERN_INFO "urb buffer free\n");
 177                 kfree(dvb->bulk_urb->transfer_buffer);
 178                 usb_free_urb(dvb->bulk_urb);
 179                 dvb->bulk_urb = NULL;
 180         }
 181 }
 182
 183 int tm6000_start_feed(struct dvb_demux_feed *feed)
 184 {
 185         struct dvb_demux *demux = feed->demux;
 186         struct tm6000_core *dev = demux->priv;
 187         struct tm6000_dvb *dvb = dev->dvb;
 188         printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
 189
 190         mutex_lock(&dvb->mutex);
 191         if (dvb->streams == 0) {
 192                 dvb->streams = 1;
 193 /*              mutex_init(&tm6000_dev->streming_mutex); */
 194                 tm6000_start_stream(dev);
 195         } else
 196                 ++(dvb->streams);
 197         mutex_unlock(&dvb->mutex);
 198
 199         return 0;
 200 }
 201
 202 int tm6000_stop_feed(struct dvb_demux_feed *feed)
 203 {
 204         struct dvb_demux *demux = feed->demux;
 205         struct tm6000_core *dev = demux->priv;
 206         struct tm6000_dvb *dvb = dev->dvb;
 207
 208         printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
 209
 210         mutex_lock(&dvb->mutex);
 211
 212         printk(KERN_INFO "stream %#x\n", dvb->streams);
 213         --(dvb->streams);
 214         if (dvb->streams == 0) {
 215                 printk(KERN_INFO "stop stream\n");
 216                 tm6000_stop_stream(dev);
 217 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 218         }
 219         mutex_unlock(&dvb->mutex);
 220 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 221
 222         return 0;
 223 }
 224
 225 int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 226 {
 227         struct tm6000_dvb *dvb = dev->dvb;
 228
 229         if (dev->caps.has_zl10353) {
 230                 struct zl10353_config config = {
 231                                      .demod_address = dev->demod_addr,
 232                                      .no_tuner = 1,
 233                                      .parallel_ts = 1,
 234                                      .if2 = 45700,
 235                                      .disable_i2c_gate_ctrl = 1,
 236                                     };
 237
 238                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 239                                                            &dev->i2c_adap);
 240         } else {
 241                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 242                 return -1;
 243         }
 244
 245         return (!dvb->frontend) ? -1 : 0;
 246 }
 247
 248 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 249
 250 int register_dvb(struct tm6000_core *dev)
 251 {
 252         int ret = -1;
 253         struct tm6000_dvb *dvb = dev->dvb;
 254
 255         mutex_init(&dvb->mutex);
 256
 257         dvb->streams = 0;
 258
 259         /* attach the frontend */
 260         ret = tm6000_dvb_attach_frontend(dev);
 261         if (ret < 0) {
 262                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 263                 goto err;
 264         }
 265
 266         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 267                                         THIS_MODULE, &dev->udev->dev, adapter_nr);
 268         dvb->adapter.priv = dev;
 269
 270         if (dvb->frontend) {
 271                 switch (dev->tuner_type) {
 272                 case TUNER_XC2028: {
 273                         struct xc2028_config cfg = {
 274                                 .i2c_adap = &dev->i2c_adap,
 275                                 .i2c_addr = dev->tuner_addr,
 276                         };
 277
 278                         dvb->frontend->callback = tm6000_tuner_callback;
 279                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 280                         if (ret < 0) {
 281                                 printk(KERN_ERR
 282                                         "tm6000: couldn't register frontend\n");
 283                                 goto adapter_err;
 284                         }
 285
 286                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 287                                 printk(KERN_ERR "tm6000: couldn't register "
 288                                                 "frontend (xc3028)\n");
 289                                 ret = -EINVAL;
 290                                 goto frontend_err;
 291                         }
 292                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 293                                          "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 "
 311                                                 "frontend (xc5000)\n");
 312                                 ret = -EINVAL;
 313                                 goto frontend_err;
 314                         }
 315                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 316                                          "attached to frontend!\n");
 317                         break;
 318                         }
 319                 }
 320         } else
 321                 printk(KERN_ERR "tm6000: no frontend found\n");
 322
 323         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 324                                                             | DMX_MEMORY_BASED_FILTERING;
 325         dvb->demux.priv = dev;
 326         dvb->demux.filternum = 8;
 327         dvb->demux.feednum = 8;
 328         dvb->demux.start_feed = tm6000_start_feed;
 329         dvb->demux.stop_feed = tm6000_stop_feed;
 330         dvb->demux.write_to_decoder = NULL;
 331         ret = dvb_dmx_init(&dvb->demux);
 332         if (ret < 0) {
 333                 printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 334                 goto frontend_err;
 335         }
 336
 337         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 338         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 339         dvb->dmxdev.capabilities = 0;
 340
 341         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 342         if (ret < 0) {
 343                 printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 344                 goto dvb_dmx_err;
 345         }
 346
 347         return 0;
 348
 349 dvb_dmx_err:
 350         dvb_dmx_release(&dvb->demux);
 351 frontend_err:
 352         if (dvb->frontend) {
 353                 dvb_frontend_detach(dvb->frontend);
 354                 dvb_unregister_frontend(dvb->frontend);
 355         }
 356 adapter_err:
 357         dvb_unregister_adapter(&dvb->adapter);
 358 err:
 359         return ret;
 360 }
 361
 362 void unregister_dvb(struct tm6000_core *dev)
 363 {
 364         struct tm6000_dvb *dvb = dev->dvb;
 365
 366         if (dvb->bulk_urb != NULL) {
 367                 struct urb *bulk_urb = dvb->bulk_urb;
 368
 369                 kfree(bulk_urb->transfer_buffer);
 370                 bulk_urb->transfer_buffer = NULL;
 371                 usb_unlink_urb(bulk_urb);
 372                 usb_free_urb(bulk_urb);
 373         }
 374
 375 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 376         if (dvb->frontend) {
 377                 dvb_frontend_detach(dvb->frontend);
 378                 dvb_unregister_frontend(dvb->frontend);
 379         }
 380
 381         dvb_dmxdev_release(&dvb->dmxdev);
 382         dvb_dmx_release(&dvb->demux);
 383         dvb_unregister_adapter(&dvb->adapter);
 384         mutex_destroy(&dvb->mutex);
 385 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 386 }
 387
 388 static int dvb_init(struct tm6000_core *dev)
 389 {
 390         struct tm6000_dvb *dvb;
 391         int rc;
 392
 393         if (!dev)
 394                 return 0;
 395
 396         if (!dev->caps.has_dvb)
 397                 return 0;
 398
 399         dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
 400         if (!dvb) {
 401                 printk(KERN_INFO "Cannot allocate memory\n");
 402                 return -ENOMEM;
 403         }
 404
 405         dev->dvb = dvb;
 406
 407         rc = register_dvb(dev);
 408         if (rc < 0) {
 409                 kfree(dvb);
 410                 dev->dvb = NULL;
 411                 return 0;
 412         }
 413
 414         return 0;
 415 }
 416
 417 static int dvb_fini(struct tm6000_core *dev)
 418 {
 419         if (!dev)
 420                 return 0;
 421
 422         if (!dev->caps.has_dvb)
 423                 return 0;
 424
 425         if (dev->dvb) {
 426                 unregister_dvb(dev);
 427                 kfree(dev->dvb);
 428                 dev->dvb = NULL;
 429         }
 430
 431         return 0;
 432 }
 433
 434 static struct tm6000_ops dvb_ops = {
 435         .type   = TM6000_DVB,
 436         .name   = "TM6000 dvb Extension",
 437         .init   = dvb_init,
 438         .fini   = dvb_fini,
 439 };
 440
 441 static int __init tm6000_dvb_register(void)
 442 {
 443         return tm6000_register_extension(&dvb_ops);
 444 }
 445
 446 static void __exit tm6000_dvb_unregister(void)
 447 {
 448         tm6000_unregister_extension(&dvb_ops);
 449 }
 450
 451 module_init(tm6000_dvb_register);
 452 module_exit(tm6000_dvb_unregister);