drivers/media/video/cx231xx/cx231xx-dvb.c

   1 /*
   2  DVB device driver for cx231xx
   3
   4  Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
   5                 Based on em28xx driver
   6
   7  This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/slab.h>
  24 #include <linux/usb.h>
  25
  26 #include "cx231xx.h"
  27 #include <media/v4l2-common.h>
  28 #include <media/videobuf-vmalloc.h>
  29
  30 #include "xc5000.h"
  31 #include "dvb_dummy_fe.h"
  32
  33 MODULE_DESCRIPTION("driver for cx231xx based DVB cards");
  34 MODULE_AUTHOR("Srinivasa Deevi <srinivasa.deevi@conexant.com>");
  35 MODULE_LICENSE("GPL");
  36
  37 static unsigned int debug;
  38 module_param(debug, int, 0644);
  39 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
  40
  41 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  42
  43 #define dprintk(level, fmt, arg...) do {                        \
  44 if (debug >= level)                                             \
  45         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
  46 } while (0)
  47
  48 #define CX231XX_DVB_NUM_BUFS 5
  49 #define CX231XX_DVB_MAX_PACKETSIZE 564
  50 #define CX231XX_DVB_MAX_PACKETS 64
  51
  52 struct cx231xx_dvb {
  53         struct dvb_frontend *frontend;
  54
  55         /* feed count management */
  56         struct mutex lock;
  57         int nfeeds;
  58
  59         /* general boilerplate stuff */
  60         struct dvb_adapter adapter;
  61         struct dvb_demux demux;
  62         struct dmxdev dmxdev;
  63         struct dmx_frontend fe_hw;
  64         struct dmx_frontend fe_mem;
  65         struct dvb_net net;
  66 };
  67
  68 static inline void print_err_status(struct cx231xx *dev, int packet, int status)
  69 {
  70         char *errmsg = "Unknown";
  71
  72         switch (status) {
  73         case -ENOENT:
  74                 errmsg = "unlinked synchronuously";
  75                 break;
  76         case -ECONNRESET:
  77                 errmsg = "unlinked asynchronuously";
  78                 break;
  79         case -ENOSR:
  80                 errmsg = "Buffer error (overrun)";
  81                 break;
  82         case -EPIPE:
  83                 errmsg = "Stalled (device not responding)";
  84                 break;
  85         case -EOVERFLOW:
  86                 errmsg = "Babble (bad cable?)";
  87                 break;
  88         case -EPROTO:
  89                 errmsg = "Bit-stuff error (bad cable?)";
  90                 break;
  91         case -EILSEQ:
  92                 errmsg = "CRC/Timeout (could be anything)";
  93                 break;
  94         case -ETIME:
  95                 errmsg = "Device does not respond";
  96                 break;
  97         }
  98         if (packet < 0) {
  99                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
 100         } else {
 101                 dprintk(1, "URB packet %d, status %d [%s].\n",
 102                         packet, status, errmsg);
 103         }
 104 }
 105
 106 static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb)
 107 {
 108         int i;
 109
 110         if (!dev)
 111                 return 0;
 112
 113         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
 114                 return 0;
 115
 116         if (urb->status < 0) {
 117                 print_err_status(dev, -1, urb->status);
 118                 if (urb->status == -ENOENT)
 119                         return 0;
 120         }
 121
 122         for (i = 0; i < urb->number_of_packets; i++) {
 123                 int status = urb->iso_frame_desc[i].status;
 124
 125                 if (status < 0) {
 126                         print_err_status(dev, i, status);
 127                         if (urb->iso_frame_desc[i].status != -EPROTO)
 128                                 continue;
 129                 }
 130
 131                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
 132                                  urb->iso_frame_desc[i].offset,
 133                                  urb->iso_frame_desc[i].actual_length);
 134         }
 135
 136         return 0;
 137 }
 138
 139 static int start_streaming(struct cx231xx_dvb *dvb)
 140 {
 141         int rc;
 142         struct cx231xx *dev = dvb->adapter.priv;
 143
 144         usb_set_interface(dev->udev, 0, 1);
 145         rc = cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
 146         if (rc < 0)
 147                 return rc;
 148
 149         return cx231xx_init_isoc(dev, CX231XX_DVB_MAX_PACKETS,
 150                                  CX231XX_DVB_NUM_BUFS,
 151                                  CX231XX_DVB_MAX_PACKETSIZE, dvb_isoc_copy);
 152 }
 153
 154 static int stop_streaming(struct cx231xx_dvb *dvb)
 155 {
 156         struct cx231xx *dev = dvb->adapter.priv;
 157
 158         cx231xx_uninit_isoc(dev);
 159
 160         cx231xx_set_mode(dev, CX231XX_SUSPEND);
 161
 162         return 0;
 163 }
 164
 165 static int start_feed(struct dvb_demux_feed *feed)
 166 {
 167         struct dvb_demux *demux = feed->demux;
 168         struct cx231xx_dvb *dvb = demux->priv;
 169         int rc, ret;
 170
 171         if (!demux->dmx.frontend)
 172                 return -EINVAL;
 173
 174         mutex_lock(&dvb->lock);
 175         dvb->nfeeds++;
 176         rc = dvb->nfeeds;
 177
 178         if (dvb->nfeeds == 1) {
 179                 ret = start_streaming(dvb);
 180                 if (ret < 0)
 181                         rc = ret;
 182         }
 183
 184         mutex_unlock(&dvb->lock);
 185         return rc;
 186 }
 187
 188 static int stop_feed(struct dvb_demux_feed *feed)
 189 {
 190         struct dvb_demux *demux = feed->demux;
 191         struct cx231xx_dvb *dvb = demux->priv;
 192         int err = 0;
 193
 194         mutex_lock(&dvb->lock);
 195         dvb->nfeeds--;
 196
 197         if (0 == dvb->nfeeds)
 198                 err = stop_streaming(dvb);
 199
 200         mutex_unlock(&dvb->lock);
 201         return err;
 202 }
 203
 204 /* ------------------------------------------------------------------ */
 205 static int cx231xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
 206 {
 207         struct cx231xx *dev = fe->dvb->priv;
 208
 209         if (acquire)
 210                 return cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
 211         else
 212                 return cx231xx_set_mode(dev, CX231XX_SUSPEND);
 213 }
 214
 215 /* ------------------------------------------------------------------ */
 216
 217 static struct xc5000_config cnxt_rde250_tunerconfig = {
 218         .i2c_address = 0x61,
 219         .if_khz = 5380,
 220 };
 221
 222 /* ------------------------------------------------------------------ */
 223 #if 0
 224 static int attach_xc5000(u8 addr, struct cx231xx *dev)
 225 {
 226
 227         struct dvb_frontend *fe;
 228         struct xc5000_config cfg;
 229
 230         memset(&cfg, 0, sizeof(cfg));
 231         cfg.i2c_adap = &dev->i2c_bus[1].i2c_adap;
 232         cfg.i2c_addr = addr;
 233
 234         if (!dev->dvb->frontend) {
 235                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
 236                        "Can't attach xc5000\n", dev->name);
 237                 return -EINVAL;
 238         }
 239
 240         fe = dvb_attach(xc5000_attach, dev->dvb->frontend, &cfg);
 241         if (!fe) {
 242                 printk(KERN_ERR "%s/2: xc5000 attach failed\n", dev->name);
 243                 dvb_frontend_detach(dev->dvb->frontend);
 244                 dev->dvb->frontend = NULL;
 245                 return -EINVAL;
 246         }
 247
 248         printk(KERN_INFO "%s/2: xc5000 attached\n", dev->name);
 249
 250         return 0;
 251 }
 252 #endif
 253
 254 int cx231xx_set_analog_freq(struct cx231xx *dev, u32 freq)
 255 {
 256         int status = 0;
 257
 258         if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
 259
 260                 struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
 261
 262                 if (dops->set_analog_params != NULL) {
 263                         struct analog_parameters params;
 264
 265                         params.frequency = freq;
 266                         params.std = dev->norm;
 267                         params.mode = 0;        /* 0- Air; 1 - cable */
 268                         /*params.audmode = ;       */
 269
 270                         /* Set the analog parameters to set the frequency */
 271                         cx231xx_info("Setting Frequency for XC5000\n");
 272                         dops->set_analog_params(dev->dvb->frontend, &params);
 273                 }
 274
 275         }
 276
 277         return status;
 278 }
 279
 280 int cx231xx_reset_analog_tuner(struct cx231xx *dev)
 281 {
 282         int status = 0;
 283
 284         if ((dev->dvb != NULL) && (dev->dvb->frontend != NULL)) {
 285
 286                 struct dvb_tuner_ops *dops = &dev->dvb->frontend->ops.tuner_ops;
 287
 288                 if (dops->init != NULL && !dev->xc_fw_load_done) {
 289
 290                         cx231xx_info("Reloading firmware for XC5000\n");
 291                         status = dops->init(dev->dvb->frontend);
 292                         if (status == 0) {
 293                                 dev->xc_fw_load_done = 1;
 294                                 cx231xx_info
 295                                     ("XC5000 firmware download completed\n");
 296                         } else {
 297                                 dev->xc_fw_load_done = 0;
 298                                 cx231xx_info
 299                                     ("XC5000 firmware download failed !!!\n");
 300                         }
 301                 }
 302
 303         }
 304
 305         return status;
 306 }
 307
 308 /* ------------------------------------------------------------------ */
 309
 310 static int register_dvb(struct cx231xx_dvb *dvb,
 311                         struct module *module,
 312                         struct cx231xx *dev, struct device *device)
 313 {
 314         int result;
 315
 316         mutex_init(&dvb->lock);
 317
 318         /* register adapter */
 319         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
 320                                       adapter_nr);
 321         if (result < 0) {
 322                 printk(KERN_WARNING
 323                        "%s: dvb_register_adapter failed (errno = %d)\n",
 324                        dev->name, result);
 325                 goto fail_adapter;
 326         }
 327
 328         /* Ensure all frontends negotiate bus access */
 329         dvb->frontend->ops.ts_bus_ctrl = cx231xx_dvb_bus_ctrl;
 330
 331         dvb->adapter.priv = dev;
 332
 333         /* register frontend */
 334         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 335         if (result < 0) {
 336                 printk(KERN_WARNING
 337                        "%s: dvb_register_frontend failed (errno = %d)\n",
 338                        dev->name, result);
 339                 goto fail_frontend;
 340         }
 341
 342         /* register demux stuff */
 343         dvb->demux.dmx.capabilities =
 344             DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 345             DMX_MEMORY_BASED_FILTERING;
 346         dvb->demux.priv = dvb;
 347         dvb->demux.filternum = 256;
 348         dvb->demux.feednum = 256;
 349         dvb->demux.start_feed = start_feed;
 350         dvb->demux.stop_feed = stop_feed;
 351
 352         result = dvb_dmx_init(&dvb->demux);
 353         if (result < 0) {
 354                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
 355                        dev->name, result);
 356                 goto fail_dmx;
 357         }
 358
 359         dvb->dmxdev.filternum = 256;
 360         dvb->dmxdev.demux = &dvb->demux.dmx;
 361         dvb->dmxdev.capabilities = 0;
 362         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 363         if (result < 0) {
 364                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
 365                        dev->name, result);
 366                 goto fail_dmxdev;
 367         }
 368
 369         dvb->fe_hw.source = DMX_FRONTEND_0;
 370         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 371         if (result < 0) {
 372                 printk(KERN_WARNING
 373                        "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 374                        dev->name, result);
 375                 goto fail_fe_hw;
 376         }
 377
 378         dvb->fe_mem.source = DMX_MEMORY_FE;
 379         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 380         if (result < 0) {
 381                 printk(KERN_WARNING
 382                        "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 383                        dev->name, result);
 384                 goto fail_fe_mem;
 385         }
 386
 387         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 388         if (result < 0) {
 389                 printk(KERN_WARNING
 390                        "%s: connect_frontend failed (errno = %d)\n", dev->name,
 391                        result);
 392                 goto fail_fe_conn;
 393         }
 394
 395         /* register network adapter */
 396         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 397         return 0;
 398
 399 fail_fe_conn:
 400         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 401 fail_fe_mem:
 402         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 403 fail_fe_hw:
 404         dvb_dmxdev_release(&dvb->dmxdev);
 405 fail_dmxdev:
 406         dvb_dmx_release(&dvb->demux);
 407 fail_dmx:
 408         dvb_unregister_frontend(dvb->frontend);
 409 fail_frontend:
 410         dvb_frontend_detach(dvb->frontend);
 411         dvb_unregister_adapter(&dvb->adapter);
 412 fail_adapter:
 413         return result;
 414 }
 415
 416 static void unregister_dvb(struct cx231xx_dvb *dvb)
 417 {
 418         dvb_net_release(&dvb->net);
 419         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 420         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 421         dvb_dmxdev_release(&dvb->dmxdev);
 422         dvb_dmx_release(&dvb->demux);
 423         dvb_unregister_frontend(dvb->frontend);
 424         dvb_frontend_detach(dvb->frontend);
 425         dvb_unregister_adapter(&dvb->adapter);
 426 }
 427
 428 static int dvb_init(struct cx231xx *dev)
 429 {
 430         int result = 0;
 431         struct cx231xx_dvb *dvb;
 432
 433         if (!dev->board.has_dvb) {
 434                 /* This device does not support the extension */
 435                 return 0;
 436         }
 437
 438         dvb = kzalloc(sizeof(struct cx231xx_dvb), GFP_KERNEL);
 439
 440         if (dvb == NULL) {
 441                 printk(KERN_INFO "cx231xx_dvb: memory allocation failed\n");
 442                 return -ENOMEM;
 443         }
 444         dev->dvb = dvb;
 445         dev->cx231xx_set_analog_freq = cx231xx_set_analog_freq;
 446         dev->cx231xx_reset_analog_tuner = cx231xx_reset_analog_tuner;
 447
 448         cx231xx_set_mode(dev, CX231XX_DIGITAL_MODE);
 449         /* init frontend */
 450         switch (dev->model) {
 451         case CX231XX_BOARD_CNXT_RDE_250:
 452
 453                 /* dev->dvb->frontend = dvb_attach(s5h1411_attach,
 454                    &dvico_s5h1411_config,
 455                    &dev->i2c_bus[1].i2c_adap); */
 456                 dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
 457
 458                 if (dev->dvb->frontend == NULL) {
 459                         printk(DRIVER_NAME
 460                                ": Failed to attach dummy front end\n");
 461                         result = -EINVAL;
 462                         goto out_free;
 463                 }
 464
 465                 /* define general-purpose callback pointer */
 466                 dvb->frontend->callback = cx231xx_tuner_callback;
 467
 468                 if (!dvb_attach(xc5000_attach, dev->dvb->frontend,
 469                                &dev->i2c_bus[1].i2c_adap,
 470                                &cnxt_rde250_tunerconfig)) {
 471                         result = -EINVAL;
 472                         goto out_free;
 473                 }
 474
 475                 break;
 476         case CX231XX_BOARD_CNXT_RDU_250:
 477
 478                 dev->dvb->frontend = dvb_attach(dvb_dummy_fe_ofdm_attach);
 479
 480                 if (dev->dvb->frontend == NULL) {
 481                         printk(DRIVER_NAME
 482                                ": Failed to attach dummy front end\n");
 483                         result = -EINVAL;
 484                         goto out_free;
 485                 }
 486
 487                 /* define general-purpose callback pointer */
 488                 dvb->frontend->callback = cx231xx_tuner_callback;
 489
 490                 if (!dvb_attach(xc5000_attach, dev->dvb->frontend,
 491                                &dev->i2c_bus[1].i2c_adap,
 492                                &cnxt_rde250_tunerconfig)) {
 493                         result = -EINVAL;
 494                         goto out_free;
 495                 }
 496                 break;
 497
 498         default:
 499                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
 500                        " isn't supported yet\n", dev->name);
 501                 break;
 502         }
 503         if (NULL == dvb->frontend) {
 504                 printk(KERN_ERR
 505                        "%s/2: frontend initialization failed\n", dev->name);
 506                 result = -EINVAL;
 507                 goto out_free;
 508         }
 509
 510         /* register everything */
 511         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
 512
 513         if (result < 0)
 514                 goto out_free;
 515
 516         cx231xx_set_mode(dev, CX231XX_SUSPEND);
 517         printk(KERN_INFO "Successfully loaded cx231xx-dvb\n");
 518         return 0;
 519
 520 out_free:
 521         cx231xx_set_mode(dev, CX231XX_SUSPEND);
 522         kfree(dvb);
 523         dev->dvb = NULL;
 524         return result;
 525 }
 526
 527 static int dvb_fini(struct cx231xx *dev)
 528 {
 529         if (!dev->board.has_dvb) {
 530                 /* This device does not support the extension */
 531                 return 0;
 532         }
 533
 534         if (dev->dvb) {
 535                 unregister_dvb(dev->dvb);
 536                 dev->dvb = NULL;
 537         }
 538
 539         return 0;
 540 }
 541
 542 static struct cx231xx_ops dvb_ops = {
 543         .id = CX231XX_DVB,
 544         .name = "Cx231xx dvb Extension",
 545         .init = dvb_init,
 546         .fini = dvb_fini,
 547 };
 548
 549 static int __init cx231xx_dvb_register(void)
 550 {
 551         return cx231xx_register_extension(&dvb_ops);
 552 }
 553
 554 static void __exit cx231xx_dvb_unregister(void)
 555 {
 556         cx231xx_unregister_extension(&dvb_ops);
 557 }
 558
 559 module_init(cx231xx_dvb_register);
 560 module_exit(cx231xx_dvb_unregister);