drivers/media/dvb/frontends/or51132.c

   1 /*
   2  *    Support for OR51132 (pcHDTV HD-3000) - VSB/QAM
   3  *
   4  *
   5  *    Copyright (C) 2007 Trent Piepho <xyzzy@speakeasy.org>
   6  *
   7  *    Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
   8  *
   9  *    Based on code from Jack Kelliher (kelliher@xmission.com)
  10  *                           Copyright (C) 2002 & pcHDTV, inc.
  11  *
  12  *    This program is free software; you can redistribute it and/or modify
  13  *    it under the terms of the GNU General Public License as published by
  14  *    the Free Software Foundation; either version 2 of the License, or
  15  *    (at your option) any later version.
  16  *
  17  *    This program is distributed in the hope that it will be useful,
  18  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *    GNU General Public License for more details.
  21  *
  22  *    You should have received a copy of the GNU General Public License
  23  *    along with this program; if not, write to the Free Software
  24  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26 */
  27
  28 /*
  29  * This driver needs two external firmware files. Please copy
  30  * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to
  31  * /usr/lib/hotplug/firmware/ or /lib/firmware/
  32  * (depending on configuration of firmware hotplug).
  33  */
  34 #define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw"
  35 #define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw"
  36
  37 #include <linux/kernel.h>
  38 #include <linux/module.h>
  39 #include <linux/moduleparam.h>
  40 #include <linux/init.h>
  41 #include <linux/delay.h>
  42 #include <linux/string.h>
  43 #include <linux/slab.h>
  44 #include <asm/byteorder.h>
  45
  46 #include "dvb_math.h"
  47 #include "dvb_frontend.h"
  48 #include "dvb-pll.h"
  49 #include "or51132.h"
  50
  51 static int debug;
  52 #define dprintk(args...) \
  53         do { \
  54                 if (debug) printk(KERN_DEBUG "or51132: " args); \
  55         } while (0)
  56
  57
  58 struct or51132_state
  59 {
  60         struct i2c_adapter* i2c;
  61
  62         /* Configuration settings */
  63         const struct or51132_config* config;
  64
  65         struct dvb_frontend frontend;
  66
  67         /* Demodulator private data */
  68         fe_modulation_t current_modulation;
  69         u32 snr; /* Result of last SNR calculation */
  70
  71         /* Tuner private data */
  72         u32 current_frequency;
  73 };
  74
  75
  76 /* Write buffer to demod */
  77 static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len)
  78 {
  79         int err;
  80         struct i2c_msg msg = { .addr = state->config->demod_address,
  81                                .flags = 0, .buf = (u8*)buf, .len = len };
  82
  83         /* msleep(20); */ /* doesn't appear to be necessary */
  84         if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
  85                 printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n",
  86                        msg.addr, msg.len, err);
  87                 return -EREMOTEIO;
  88         }
  89         return 0;
  90 }
  91
  92 /* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00);
  93    Less code and more efficient that loading a buffer on the stack with
  94    the bytes to send and then calling or51132_writebuf() on that. */
  95 #define or51132_writebytes(state, data...)  \
  96         ({ const static u8 _data[] = {data}; \
  97         or51132_writebuf(state, _data, sizeof(_data)); })
  98
  99 /* Read data from demod into buffer.  Returns 0 on success. */
 100 static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len)
 101 {
 102         int err;
 103         struct i2c_msg msg = { .addr = state->config->demod_address,
 104                                .flags = I2C_M_RD, .buf = buf, .len = len };
 105
 106         /* msleep(20); */ /* doesn't appear to be necessary */
 107         if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
 108                 printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n",
 109                        msg.addr, msg.len, err);
 110                 return -EREMOTEIO;
 111         }
 112         return 0;
 113 }
 114
 115 /* Reads a 16-bit demod register.  Returns <0 on error. */
 116 static int or51132_readreg(struct or51132_state *state, u8 reg)
 117 {
 118         u8 buf[2] = { 0x04, reg };
 119         struct i2c_msg msg[2] = {
 120                 {.addr = state->config->demod_address, .flags = 0,
 121                  .buf = buf, .len = 2 },
 122                 {.addr = state->config->demod_address, .flags = I2C_M_RD,
 123                  .buf = buf, .len = 2 }};
 124         int err;
 125
 126         if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) {
 127                 printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n",
 128                        reg, err);
 129                 return -EREMOTEIO;
 130         }
 131         return le16_to_cpup((u16*)buf);
 132 }
 133
 134 static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
 135 {
 136         struct or51132_state* state = fe->demodulator_priv;
 137         const static u8 run_buf[] = {0x7F,0x01};
 138         u8 rec_buf[8];
 139         u32 firmwareAsize, firmwareBsize;
 140         int i,ret;
 141
 142         dprintk("Firmware is %Zd bytes\n",fw->size);
 143
 144         /* Get size of firmware A and B */
 145         firmwareAsize = le32_to_cpu(*((u32*)fw->data));
 146         dprintk("FirmwareA is %i bytes\n",firmwareAsize);
 147         firmwareBsize = le32_to_cpu(*((u32*)(fw->data+4)));
 148         dprintk("FirmwareB is %i bytes\n",firmwareBsize);
 149
 150         /* Upload firmware */
 151         if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) {
 152                 printk(KERN_WARNING "or51132: load_firmware error 1\n");
 153                 return ret;
 154         }
 155         if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize],
 156                                     firmwareBsize))) {
 157                 printk(KERN_WARNING "or51132: load_firmware error 2\n");
 158                 return ret;
 159         }
 160
 161         if ((ret = or51132_writebuf(state, run_buf, 2))) {
 162                 printk(KERN_WARNING "or51132: load_firmware error 3\n");
 163                 return ret;
 164         }
 165         if ((ret = or51132_writebuf(state, run_buf, 2))) {
 166                 printk(KERN_WARNING "or51132: load_firmware error 4\n");
 167                 return ret;
 168         }
 169
 170         /* 50ms for operation to begin */
 171         msleep(50);
 172
 173         /* Read back ucode version to besure we loaded correctly and are really up and running */
 174         /* Get uCode version */
 175         if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) {
 176                 printk(KERN_WARNING "or51132: load_firmware error a\n");
 177                 return ret;
 178         }
 179         if ((ret = or51132_writebytes(state, 0x04, 0x17))) {
 180                 printk(KERN_WARNING "or51132: load_firmware error b\n");
 181                 return ret;
 182         }
 183         if ((ret = or51132_writebytes(state, 0x00, 0x00))) {
 184                 printk(KERN_WARNING "or51132: load_firmware error c\n");
 185                 return ret;
 186         }
 187         for (i=0;i<4;i++) {
 188                 /* Once upon a time, this command might have had something
 189                    to do with getting the firmware version, but it's
 190                    not used anymore:
 191                    {0x04,0x00,0x30,0x00,i+1} */
 192                 /* Read 8 bytes, two bytes at a time */
 193                 if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) {
 194                         printk(KERN_WARNING
 195                                "or51132: load_firmware error d - %d\n",i);
 196                         return ret;
 197                 }
 198         }
 199
 200         printk(KERN_WARNING
 201                "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n",
 202                rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2],
 203                rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6],
 204                rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f,
 205                rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f);
 206
 207         if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) {
 208                 printk(KERN_WARNING "or51132: load_firmware error e\n");
 209                 return ret;
 210         }
 211         return 0;
 212 };
 213
 214 static int or51132_init(struct dvb_frontend* fe)
 215 {
 216         return 0;
 217 }
 218
 219 static int or51132_read_ber(struct dvb_frontend* fe, u32* ber)
 220 {
 221         *ber = 0;
 222         return 0;
 223 }
 224
 225 static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 226 {
 227         *ucblocks = 0;
 228         return 0;
 229 }
 230
 231 static int or51132_sleep(struct dvb_frontend* fe)
 232 {
 233         return 0;
 234 }
 235
 236 static int or51132_setmode(struct dvb_frontend* fe)
 237 {
 238         struct or51132_state* state = fe->demodulator_priv;
 239         u8 cmd_buf1[3] = {0x04, 0x01, 0x5f};
 240         u8 cmd_buf2[3] = {0x1c, 0x00, 0 };
 241
 242         dprintk("setmode %d\n",(int)state->current_modulation);
 243
 244         switch (state->current_modulation) {
 245         case VSB_8:
 246                 /* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */
 247                 cmd_buf1[2] = 0x50;
 248                 /* REC MODE inv IF spectrum, Normal */
 249                 cmd_buf2[1] = 0x03;
 250                 /* Channel MODE ATSC/VSB8 */
 251                 cmd_buf2[2] = 0x06;
 252                 break;
 253         /* All QAM modes are:
 254            Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high
 255            REC MODE Normal Carrier Lock */
 256         case QAM_AUTO:
 257                 /* Channel MODE Auto QAM64/256 */
 258                 cmd_buf2[2] = 0x4f;
 259                 break;
 260         case QAM_256:
 261                 /* Channel MODE QAM256 */
 262                 cmd_buf2[2] = 0x45;
 263                 break;
 264         case QAM_64:
 265                 /* Channel MODE QAM64 */
 266                 cmd_buf2[2] = 0x43;
 267                 break;
 268         default:
 269                 printk(KERN_WARNING
 270                        "or51132: setmode: Modulation set to unsupported value (%d)\n",
 271                        state->current_modulation);
 272                 return -EINVAL;
 273         }
 274
 275         /* Set Receiver 1 register */
 276         if (or51132_writebuf(state, cmd_buf1, 3)) {
 277                 printk(KERN_WARNING "or51132: set_mode error 1\n");
 278                 return -EREMOTEIO;
 279         }
 280         dprintk("set #1 to %02x\n", cmd_buf1[2]);
 281
 282         /* Set operation mode in Receiver 6 register */
 283         if (or51132_writebuf(state, cmd_buf2, 3)) {
 284                 printk(KERN_WARNING "or51132: set_mode error 2\n");
 285                 return -EREMOTEIO;
 286         }
 287         dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]);
 288
 289         return 0;
 290 }
 291
 292 /* Some modulations use the same firmware.  This classifies modulations
 293    by the firmware they use. */
 294 #define MOD_FWCLASS_UNKNOWN     0
 295 #define MOD_FWCLASS_VSB         1
 296 #define MOD_FWCLASS_QAM         2
 297 static int modulation_fw_class(fe_modulation_t modulation)
 298 {
 299         switch(modulation) {
 300         case VSB_8:
 301                 return MOD_FWCLASS_VSB;
 302         case QAM_AUTO:
 303         case QAM_64:
 304         case QAM_256:
 305                 return MOD_FWCLASS_QAM;
 306         default:
 307                 return MOD_FWCLASS_UNKNOWN;
 308         }
 309 }
 310
 311 static int or51132_set_parameters(struct dvb_frontend* fe,
 312                                   struct dvb_frontend_parameters *param)
 313 {
 314         int ret;
 315         struct or51132_state* state = fe->demodulator_priv;
 316         const struct firmware *fw;
 317         const char *fwname;
 318         int clock_mode;
 319
 320         /* Upload new firmware only if we need a different one */
 321         if (modulation_fw_class(state->current_modulation) !=
 322             modulation_fw_class(param->u.vsb.modulation)) {
 323                 switch(modulation_fw_class(param->u.vsb.modulation)) {
 324                 case MOD_FWCLASS_VSB:
 325                         dprintk("set_parameters VSB MODE\n");
 326                         fwname = OR51132_VSB_FIRMWARE;
 327
 328                         /* Set non-punctured clock for VSB */
 329                         clock_mode = 0;
 330                         break;
 331                 case MOD_FWCLASS_QAM:
 332                         dprintk("set_parameters QAM MODE\n");
 333                         fwname = OR51132_QAM_FIRMWARE;
 334
 335                         /* Set punctured clock for QAM */
 336                         clock_mode = 1;
 337                         break;
 338                 default:
 339                         printk("or51132: Modulation type(%d) UNSUPPORTED\n",
 340                                param->u.vsb.modulation);
 341                         return -1;
 342                 }
 343                 printk("or51132: Waiting for firmware upload(%s)...\n",
 344                        fwname);
 345                 ret = request_firmware(&fw, fwname, &state->i2c->dev);
 346                 if (ret) {
 347                         printk(KERN_WARNING "or51132: No firmware up"
 348                                "loaded(timeout or file not found?)\n");
 349                         return ret;
 350                 }
 351                 ret = or51132_load_firmware(fe, fw);
 352                 release_firmware(fw);
 353                 if (ret) {
 354                         printk(KERN_WARNING "or51132: Writing firmware to "
 355                                "device failed!\n");
 356                         return ret;
 357                 }
 358                 printk("or51132: Firmware upload complete.\n");
 359                 state->config->set_ts_params(fe, clock_mode);
 360         }
 361         /* Change only if we are actually changing the modulation */
 362         if (state->current_modulation != param->u.vsb.modulation) {
 363                 state->current_modulation = param->u.vsb.modulation;
 364                 or51132_setmode(fe);
 365         }
 366
 367         if (fe->ops.tuner_ops.set_params) {
 368                 fe->ops.tuner_ops.set_params(fe, param);
 369                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 370         }
 371
 372         /* Set to current mode */
 373         or51132_setmode(fe);
 374
 375         /* Update current frequency */
 376         state->current_frequency = param->frequency;
 377         return 0;
 378 }
 379
 380 static int or51132_get_parameters(struct dvb_frontend* fe,
 381                                   struct dvb_frontend_parameters *param)
 382 {
 383         struct or51132_state* state = fe->demodulator_priv;
 384         int status;
 385         int retry = 1;
 386
 387 start:
 388         /* Receiver Status */
 389         if ((status = or51132_readreg(state, 0x00)) < 0) {
 390                 printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n");
 391                 return -EREMOTEIO;
 392         }
 393         switch(status&0xff) {
 394                 case 0x06: param->u.vsb.modulation = VSB_8; break;
 395                 case 0x43: param->u.vsb.modulation = QAM_64; break;
 396                 case 0x45: param->u.vsb.modulation = QAM_256; break;
 397                 default:
 398                         if (retry--) goto start;
 399                         printk(KERN_WARNING "or51132: unknown status 0x%02x\n",
 400                                status&0xff);
 401                         return -EREMOTEIO;
 402         }
 403
 404         /* FIXME: Read frequency from frontend, take AFC into account */
 405         param->frequency = state->current_frequency;
 406
 407         /* FIXME: How to read inversion setting? Receiver 6 register? */
 408         param->inversion = INVERSION_AUTO;
 409
 410         return 0;
 411 }
 412
 413 static int or51132_read_status(struct dvb_frontend* fe, fe_status_t* status)
 414 {
 415         struct or51132_state* state = fe->demodulator_priv;
 416         int reg;
 417
 418         /* Receiver Status */
 419         if ((reg = or51132_readreg(state, 0x00)) < 0) {
 420                 printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg);
 421                 *status = 0;
 422                 return -EREMOTEIO;
 423         }
 424         dprintk("%s: read_status %04x\n", __FUNCTION__, reg);
 425
 426         if (reg & 0x0100) /* Receiver Lock */
 427                 *status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|
 428                           FE_HAS_SYNC|FE_HAS_LOCK;
 429         else
 430                 *status = 0;
 431         return 0;
 432 }
 433
 434 /* Calculate SNR estimation (scaled by 2^24)
 435
 436    8-VSB SNR and QAM equations from Oren datasheets
 437
 438    For 8-VSB:
 439      SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K
 440
 441      Where K = 0 if NTSC rejection filter is OFF; and
 442            K = 3 if NTSC rejection filter is ON
 443
 444    For QAM64:
 445      SNR[dB] = 10 * log10(897152044.8282 / MSE^2 )
 446
 447    For QAM256:
 448      SNR[dB] = 10 * log10(907832426.314266  / MSE^2 )
 449
 450    We re-write the snr equation as:
 451      SNR * 2^24 = 10*(c - 2*intlog10(MSE))
 452    Where for QAM256, c = log10(907832426.314266) * 2^24
 453    and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */
 454
 455 static u32 calculate_snr(u32 mse, u32 c)
 456 {
 457         if (mse == 0) /* No signal */
 458                 return 0;
 459
 460         mse = 2*intlog10(mse);
 461         if (mse > c) {
 462                 /* Negative SNR, which is possible, but realisticly the
 463                 demod will lose lock before the signal gets this bad.  The
 464                 API only allows for unsigned values, so just return 0 */
 465                 return 0;
 466         }
 467         return 10*(c - mse);
 468 }
 469
 470 static int or51132_read_snr(struct dvb_frontend* fe, u16* snr)
 471 {
 472         struct or51132_state* state = fe->demodulator_priv;
 473         int noise, reg;
 474         u32 c, usK = 0;
 475         int retry = 1;
 476
 477 start:
 478         /* SNR after Equalizer */
 479         noise = or51132_readreg(state, 0x02);
 480         if (noise < 0) {
 481                 printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n");
 482                 return -EREMOTEIO;
 483         }
 484         dprintk("read_snr noise (%d)\n", noise);
 485
 486         /* Read status, contains modulation type for QAM_AUTO and
 487            NTSC filter for VSB */
 488         reg = or51132_readreg(state, 0x00);
 489         if (reg < 0) {
 490                 printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n");
 491                 return -EREMOTEIO;
 492         }
 493
 494         switch (reg&0xff) {
 495         case 0x06:
 496                 if (reg & 0x1000) usK = 3 << 24;
 497                 /* Fall through to QAM64 case */
 498         case 0x43:
 499                 c = 150204167;
 500                 break;
 501         case 0x45:
 502                 c = 150290396;
 503                 break;
 504         default:
 505                 printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff);
 506                 if (retry--) goto start;
 507                 return -EREMOTEIO;
 508         }
 509         dprintk("%s: modulation %02x, NTSC rej O%s\n", __FUNCTION__,
 510                 reg&0xff, reg&0x1000?"n":"ff");
 511
 512         /* Calculate SNR using noise, c, and NTSC rejection correction */
 513         state->snr = calculate_snr(noise, c) - usK;
 514         *snr = (state->snr) >> 16;
 515
 516         dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __FUNCTION__, noise,
 517                 state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
 518
 519         return 0;
 520 }
 521
 522 static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 523 {
 524         /* Calculate Strength from SNR up to 35dB */
 525         /* Even though the SNR can go higher than 35dB, there is some comfort */
 526         /* factor in having a range of strong signals that can show at 100%   */
 527         struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv;
 528         u16 snr;
 529         int ret;
 530
 531         ret = fe->ops.read_snr(fe, &snr);
 532         if (ret != 0)
 533                 return ret;
 534         /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
 535         /* scale the range 0 - 35*2^24 into 0 - 65535 */
 536         if (state->snr >= 8960 * 0x10000)
 537                 *strength = 0xffff;
 538         else
 539                 *strength = state->snr / 8960;
 540
 541         return 0;
 542 }
 543
 544 static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
 545 {
 546         fe_tune_settings->min_delay_ms = 500;
 547         fe_tune_settings->step_size = 0;
 548         fe_tune_settings->max_drift = 0;
 549
 550         return 0;
 551 }
 552
 553 static void or51132_release(struct dvb_frontend* fe)
 554 {
 555         struct or51132_state* state = fe->demodulator_priv;
 556         kfree(state);
 557 }
 558
 559 static struct dvb_frontend_ops or51132_ops;
 560
 561 struct dvb_frontend* or51132_attach(const struct or51132_config* config,
 562                                     struct i2c_adapter* i2c)
 563 {
 564         struct or51132_state* state = NULL;
 565
 566         /* Allocate memory for the internal state */
 567         state = kmalloc(sizeof(struct or51132_state), GFP_KERNEL);
 568         if (state == NULL)
 569                 goto error;
 570
 571         /* Setup the state */
 572         state->config = config;
 573         state->i2c = i2c;
 574         state->current_frequency = -1;
 575         state->current_modulation = -1;
 576
 577         /* Create dvb_frontend */
 578         memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops));
 579         state->frontend.demodulator_priv = state;
 580         return &state->frontend;
 581
 582 error:
 583         kfree(state);
 584         return NULL;
 585 }
 586
 587 static struct dvb_frontend_ops or51132_ops = {
 588
 589         .info = {
 590                 .name                   = "Oren OR51132 VSB/QAM Frontend",
 591                 .type                   = FE_ATSC,
 592                 .frequency_min          = 44000000,
 593                 .frequency_max          = 958000000,
 594                 .frequency_stepsize     = 166666,
 595                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 596                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 597                         FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO |
 598                         FE_CAN_8VSB
 599         },
 600
 601         .release = or51132_release,
 602
 603         .init = or51132_init,
 604         .sleep = or51132_sleep,
 605
 606         .set_frontend = or51132_set_parameters,
 607         .get_frontend = or51132_get_parameters,
 608         .get_tune_settings = or51132_get_tune_settings,
 609
 610         .read_status = or51132_read_status,
 611         .read_ber = or51132_read_ber,
 612         .read_signal_strength = or51132_read_signal_strength,
 613         .read_snr = or51132_read_snr,
 614         .read_ucblocks = or51132_read_ucblocks,
 615 };
 616
 617 module_param(debug, int, 0644);
 618 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 619
 620 MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver");
 621 MODULE_AUTHOR("Kirk Lapray");
 622 MODULE_AUTHOR("Trent Piepho");
 623 MODULE_LICENSE("GPL");
 624
 625 EXPORT_SYMBOL(or51132_attach);
 626
 627 /*
 628  * Local variables:
 629  * c-basic-offset: 8
 630  * End:
 631  */