2 * Support for LGDT3302 and LGDT3303 - VSB/QAM
4 * Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net>
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; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * NOTES ABOUT THIS DRIVER
25 * This Linux driver supports:
26 * DViCO FusionHDTV 3 Gold-Q
27 * DViCO FusionHDTV 3 Gold-T
28 * DViCO FusionHDTV 5 Gold
29 * DViCO FusionHDTV 5 Lite
30 * DViCO FusionHDTV 5 USB Gold
31 * Air2PC/AirStar 2 ATSC 3rd generation (HD5000)
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/moduleparam.h>
39 #include <linux/init.h>
40 #include <linux/delay.h>
41 #include <linux/string.h>
42 #include <linux/slab.h>
43 #include <asm/byteorder.h>
45 #include "dvb_frontend.h"
47 #include "lgdt330x_priv.h"
50 /* Use Equalizer Mean Squared Error instead of Phaser Tracker MSE */
51 /* #define USE_EQMSE */
54 module_param(debug, int, 0644);
55 MODULE_PARM_DESC(debug,"Turn on/off lgdt330x frontend debugging (default:off).");
56 #define dprintk(args...) \
58 if (debug) printk(KERN_DEBUG "lgdt330x: " args); \
63 struct i2c_adapter* i2c;
65 /* Configuration settings */
66 const struct lgdt330x_config* config;
68 struct dvb_frontend frontend;
70 /* Demodulator private data */
71 fe_modulation_t current_modulation;
72 u32 snr; /* Result of last SNR calculation */
74 /* Tuner private data */
75 u32 current_frequency;
78 static int i2c_write_demod_bytes (struct lgdt330x_state* state,
79 u8 *buf, /* data bytes to send */
80 int len /* number of bytes to send */ )
83 { .addr = state->config->demod_address,
90 for (i=0; i<len-1; i+=2){
91 if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
92 printk(KERN_WARNING "lgdt330x: %s error (addr %02x <- %02x, err = %i)\n", __FUNCTION__, msg.buf[0], msg.buf[1], err);
104 * This routine writes the register (reg) to the demod bus
105 * then reads the data returned for (len) bytes.
108 static u8 i2c_read_demod_bytes (struct lgdt330x_state* state,
109 enum I2C_REG reg, u8* buf, int len)
112 struct i2c_msg msg [] = {
113 { .addr = state->config->demod_address,
114 .flags = 0, .buf = wr, .len = 1 },
115 { .addr = state->config->demod_address,
116 .flags = I2C_M_RD, .buf = buf, .len = len },
119 ret = i2c_transfer(state->i2c, msg, 2);
121 printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __FUNCTION__, state->config->demod_address, reg, ret);
129 static int lgdt3302_SwReset(struct lgdt330x_state* state)
134 0x00 /* bit 6 is active low software reset
135 * bits 5-0 are 1 to mask interrupts */
138 ret = i2c_write_demod_bytes(state,
139 reset, sizeof(reset));
142 /* force reset high (inactive) and unmask interrupts */
144 ret = i2c_write_demod_bytes(state,
145 reset, sizeof(reset));
150 static int lgdt3303_SwReset(struct lgdt330x_state* state)
155 0x00 /* bit 0 is active low software reset */
158 ret = i2c_write_demod_bytes(state,
159 reset, sizeof(reset));
162 /* force reset high (inactive) */
164 ret = i2c_write_demod_bytes(state,
165 reset, sizeof(reset));
170 static int lgdt330x_SwReset(struct lgdt330x_state* state)
172 switch (state->config->demod_chip) {
174 return lgdt3302_SwReset(state);
176 return lgdt3303_SwReset(state);
182 static int lgdt330x_init(struct dvb_frontend* fe)
184 /* Hardware reset is done using gpio[0] of cx23880x chip.
185 * I'd like to do it here, but don't know how to find chip address.
186 * cx88-cards.c arranges for the reset bit to be inactive (high).
187 * Maybe there needs to be a callable function in cx88-core or
188 * the caller of this function needs to do it. */
191 * Array of byte pairs <address, value>
192 * to initialize each different chip
194 static u8 lgdt3302_init_data[] = {
195 /* Use 50MHz parameter values from spec sheet since xtal is 50 */
196 /* Change the value of NCOCTFV[25:0] of carrier
197 recovery center frequency register */
198 VSB_CARRIER_FREQ0, 0x00,
199 VSB_CARRIER_FREQ1, 0x87,
200 VSB_CARRIER_FREQ2, 0x8e,
201 VSB_CARRIER_FREQ3, 0x01,
202 /* Change the TPCLK pin polarity
203 data is valid on falling clock */
205 /* Change the value of IFBW[11:0] of
206 AGC IF/RF loop filter bandwidth register */
207 AGC_RF_BANDWIDTH0, 0x40,
208 AGC_RF_BANDWIDTH1, 0x93,
209 AGC_RF_BANDWIDTH2, 0x00,
210 /* Change the value of bit 6, 'nINAGCBY' and
211 'NSSEL[1:0] of ACG function control register 2 */
212 AGC_FUNC_CTRL2, 0xc6,
213 /* Change the value of bit 6 'RFFIX'
214 of AGC function control register 3 */
215 AGC_FUNC_CTRL3, 0x40,
216 /* Set the value of 'INLVTHD' register 0x2a/0x2c
220 /* Change the value of IAGCBW[15:8]
221 of inner AGC loop filter bandwidth */
222 AGC_LOOP_BANDWIDTH0, 0x08,
223 AGC_LOOP_BANDWIDTH1, 0x9a
226 static u8 lgdt3303_init_data[] = {
230 static u8 flip_lgdt3303_init_data[] = {
235 struct lgdt330x_state* state = fe->demodulator_priv;
239 switch (state->config->demod_chip) {
241 chip_name = "LGDT3302";
242 err = i2c_write_demod_bytes(state, lgdt3302_init_data,
243 sizeof(lgdt3302_init_data));
246 chip_name = "LGDT3303";
247 if (state->config->clock_polarity_flip) {
248 err = i2c_write_demod_bytes(state, flip_lgdt3303_init_data,
249 sizeof(flip_lgdt3303_init_data));
251 err = i2c_write_demod_bytes(state, lgdt3303_init_data,
252 sizeof(lgdt3303_init_data));
256 chip_name = "undefined";
257 printk (KERN_WARNING "Only LGDT3302 and LGDT3303 are supported chips.\n");
260 dprintk("%s entered as %s\n", __FUNCTION__, chip_name);
263 return lgdt330x_SwReset(state);
266 static int lgdt330x_read_ber(struct dvb_frontend* fe, u32* ber)
268 *ber = 0; /* Not supplied by the demod chips */
272 static int lgdt330x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
274 struct lgdt330x_state* state = fe->demodulator_priv;
278 switch (state->config->demod_chip) {
280 err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1,
284 err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1,
289 "Only LGDT3302 and LGDT3303 are supported chips.\n");
293 *ucblocks = (buf[0] << 8) | buf[1];
297 static int lgdt330x_set_parameters(struct dvb_frontend* fe,
298 struct dvb_frontend_parameters *param)
301 * Array of byte pairs <address, value>
302 * to initialize 8VSB for lgdt3303 chip 50 MHz IF
304 static u8 lgdt3303_8vsb_44_data[] = {
313 * Array of byte pairs <address, value>
314 * to initialize QAM for lgdt3303 chip
316 static u8 lgdt3303_qam_data[] = {
329 struct lgdt330x_state* state = fe->demodulator_priv;
331 static u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 };
334 /* Change only if we are actually changing the modulation */
335 if (state->current_modulation != param->u.vsb.modulation) {
336 switch(param->u.vsb.modulation) {
338 dprintk("%s: VSB_8 MODE\n", __FUNCTION__);
340 /* Select VSB mode */
341 top_ctrl_cfg[1] = 0x03;
343 /* Select ANT connector if supported by card */
344 if (state->config->pll_rf_set)
345 state->config->pll_rf_set(fe, 1);
347 if (state->config->demod_chip == LGDT3303) {
348 err = i2c_write_demod_bytes(state, lgdt3303_8vsb_44_data,
349 sizeof(lgdt3303_8vsb_44_data));
354 dprintk("%s: QAM_64 MODE\n", __FUNCTION__);
356 /* Select QAM_64 mode */
357 top_ctrl_cfg[1] = 0x00;
359 /* Select CABLE connector if supported by card */
360 if (state->config->pll_rf_set)
361 state->config->pll_rf_set(fe, 0);
363 if (state->config->demod_chip == LGDT3303) {
364 err = i2c_write_demod_bytes(state, lgdt3303_qam_data,
365 sizeof(lgdt3303_qam_data));
370 dprintk("%s: QAM_256 MODE\n", __FUNCTION__);
372 /* Select QAM_256 mode */
373 top_ctrl_cfg[1] = 0x01;
375 /* Select CABLE connector if supported by card */
376 if (state->config->pll_rf_set)
377 state->config->pll_rf_set(fe, 0);
379 if (state->config->demod_chip == LGDT3303) {
380 err = i2c_write_demod_bytes(state, lgdt3303_qam_data,
381 sizeof(lgdt3303_qam_data));
385 printk(KERN_WARNING "lgdt330x: %s: Modulation type(%d) UNSUPPORTED\n", __FUNCTION__, param->u.vsb.modulation);
389 * select serial or parallel MPEG harware interface
390 * Serial: 0x04 for LGDT3302 or 0x40 for LGDT3303
393 top_ctrl_cfg[1] |= state->config->serial_mpeg;
395 /* Select the requested mode */
396 i2c_write_demod_bytes(state, top_ctrl_cfg,
397 sizeof(top_ctrl_cfg));
398 if (state->config->set_ts_params)
399 state->config->set_ts_params(fe, 0);
400 state->current_modulation = param->u.vsb.modulation;
403 /* Tune to the specified frequency */
404 if (fe->ops.tuner_ops.set_params) {
405 fe->ops.tuner_ops.set_params(fe, param);
406 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
409 /* Keep track of the new frequency */
410 /* FIXME this is the wrong way to do this... */
411 /* The tuner is shared with the video4linux analog API */
412 state->current_frequency = param->frequency;
414 lgdt330x_SwReset(state);
418 static int lgdt330x_get_frontend(struct dvb_frontend* fe,
419 struct dvb_frontend_parameters* param)
421 struct lgdt330x_state *state = fe->demodulator_priv;
422 param->frequency = state->current_frequency;
426 static int lgdt3302_read_status(struct dvb_frontend* fe, fe_status_t* status)
428 struct lgdt330x_state* state = fe->demodulator_priv;
431 *status = 0; /* Reset status result */
433 /* AGC status register */
434 i2c_read_demod_bytes(state, AGC_STATUS, buf, 1);
435 dprintk("%s: AGC_STATUS = 0x%02x\n", __FUNCTION__, buf[0]);
436 if ((buf[0] & 0x0c) == 0x8){
437 /* Test signal does not exist flag */
438 /* as well as the AGC lock flag. */
439 *status |= FE_HAS_SIGNAL;
441 /* Without a signal all other status bits are meaningless */
446 * You must set the Mask bits to 1 in the IRQ_MASK in order
447 * to see that status bit in the IRQ_STATUS register.
448 * This is done in SwReset();
451 i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf));
452 dprintk("%s: TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", __FUNCTION__, buf[0], buf[1], buf[2]);
456 if ((buf[2] & 0x03) == 0x01) {
457 *status |= FE_HAS_SYNC;
460 /* FEC error status */
461 if ((buf[2] & 0x0c) == 0x08) {
462 *status |= FE_HAS_LOCK;
463 *status |= FE_HAS_VITERBI;
466 /* Carrier Recovery Lock Status Register */
467 i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1);
468 dprintk("%s: CARRIER_LOCK = 0x%02x\n", __FUNCTION__, buf[0]);
469 switch (state->current_modulation) {
472 /* Need to undestand why there are 3 lock levels here */
473 if ((buf[0] & 0x07) == 0x07)
474 *status |= FE_HAS_CARRIER;
477 if ((buf[0] & 0x80) == 0x80)
478 *status |= FE_HAS_CARRIER;
481 printk("KERN_WARNING lgdt330x: %s: Modulation set to unsupported value\n", __FUNCTION__);
487 static int lgdt3303_read_status(struct dvb_frontend* fe, fe_status_t* status)
489 struct lgdt330x_state* state = fe->demodulator_priv;
493 *status = 0; /* Reset status result */
495 /* lgdt3303 AGC status register */
496 err = i2c_read_demod_bytes(state, 0x58, buf, 1);
500 dprintk("%s: AGC_STATUS = 0x%02x\n", __FUNCTION__, buf[0]);
501 if ((buf[0] & 0x21) == 0x01){
502 /* Test input signal does not exist flag */
503 /* as well as the AGC lock flag. */
504 *status |= FE_HAS_SIGNAL;
506 /* Without a signal all other status bits are meaningless */
510 /* Carrier Recovery Lock Status Register */
511 i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1);
512 dprintk("%s: CARRIER_LOCK = 0x%02x\n", __FUNCTION__, buf[0]);
513 switch (state->current_modulation) {
516 /* Need to undestand why there are 3 lock levels here */
517 if ((buf[0] & 0x07) == 0x07)
518 *status |= FE_HAS_CARRIER;
521 i2c_read_demod_bytes(state, 0x8a, buf, 1);
522 if ((buf[0] & 0x04) == 0x04)
523 *status |= FE_HAS_SYNC;
524 if ((buf[0] & 0x01) == 0x01)
525 *status |= FE_HAS_LOCK;
526 if ((buf[0] & 0x08) == 0x08)
527 *status |= FE_HAS_VITERBI;
530 if ((buf[0] & 0x80) == 0x80)
531 *status |= FE_HAS_CARRIER;
534 i2c_read_demod_bytes(state, 0x38, buf, 1);
535 if ((buf[0] & 0x02) == 0x00)
536 *status |= FE_HAS_SYNC;
537 if ((buf[0] & 0x01) == 0x01) {
538 *status |= FE_HAS_LOCK;
539 *status |= FE_HAS_VITERBI;
543 printk("KERN_WARNING lgdt330x: %s: Modulation set to unsupported value\n", __FUNCTION__);
548 /* Calculate SNR estimation (scaled by 2^24)
550 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM
551 equations from LGDT3303 datasheet. VSB is the same between the '02
552 and '03, so maybe QAM is too? Perhaps someone with a newer datasheet
553 that has QAM information could verify?
555 For 8-VSB: (two ways, take your pick)
557 SNR_EQ = 10 * log10(25 * 24^2 / EQ_MSE)
559 SNR_EQ = 10 * log10(25 * 32^2 / EQ_MSE)
561 SNR_PT = 10 * log10(25 * 32^2 / PT_MSE) (we use this one)
563 SNR = 10 * log10( 688128 / MSEQAM)
565 SNR = 10 * log10( 696320 / MSEQAM)
567 We re-write the snr equation as:
568 SNR * 2^24 = 10*(c - intlog10(MSE))
569 Where for 256-QAM, c = log10(696320) * 2^24, and so on. */
571 static u32 calculate_snr(u32 mse, u32 c)
573 if (mse == 0) /* No signal */
578 /* Negative SNR, which is possible, but realisticly the
579 demod will lose lock before the signal gets this bad. The
580 API only allows for unsigned values, so just return 0 */
586 static int lgdt3302_read_snr(struct dvb_frontend* fe, u16* snr)
588 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
589 u8 buf[5]; /* read data buffer */
590 u32 noise; /* noise value */
591 u32 c; /* per-modulation SNR calculation constant */
593 switch(state->current_modulation) {
595 i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5);
597 /* Use Equalizer Mean-Square Error Register */
598 /* SNR for ranges from -15.61 to +41.58 */
599 noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2];
600 c = 69765745; /* log10(25*24^2)*2^24 */
602 /* Use Phase Tracker Mean-Square Error Register */
603 /* SNR for ranges from -13.11 to +44.08 */
604 noise = ((buf[0] & 7<<3) << 13) | (buf[3] << 8) | buf[4];
605 c = 73957994; /* log10(25*32^2)*2^24 */
610 i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2);
611 noise = ((buf[0] & 3) << 8) | buf[1];
612 c = state->current_modulation == QAM_64 ? 97939837 : 98026066;
613 /* log10(688128)*2^24 and log10(696320)*2^24 */
616 printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n",
618 return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */
621 state->snr = calculate_snr(noise, c);
622 *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */
624 dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __FUNCTION__, noise,
625 state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
630 static int lgdt3303_read_snr(struct dvb_frontend* fe, u16* snr)
632 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
633 u8 buf[5]; /* read data buffer */
634 u32 noise; /* noise value */
635 u32 c; /* per-modulation SNR calculation constant */
637 switch(state->current_modulation) {
639 i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5);
641 /* Use Equalizer Mean-Square Error Register */
642 /* SNR for ranges from -16.12 to +44.08 */
643 noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2];
644 c = 73957994; /* log10(25*32^2)*2^24 */
646 /* Use Phase Tracker Mean-Square Error Register */
647 /* SNR for ranges from -13.11 to +44.08 */
648 noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4];
649 c = 73957994; /* log10(25*32^2)*2^24 */
654 i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2);
655 noise = (buf[0] << 8) | buf[1];
656 c = state->current_modulation == QAM_64 ? 97939837 : 98026066;
657 /* log10(688128)*2^24 and log10(696320)*2^24 */
660 printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n",
662 return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */
665 state->snr = calculate_snr(noise, c);
666 *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */
668 dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __FUNCTION__, noise,
669 state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16);
674 static int lgdt330x_read_signal_strength(struct dvb_frontend* fe, u16* strength)
676 /* Calculate Strength from SNR up to 35dB */
677 /* Even though the SNR can go higher than 35dB, there is some comfort */
678 /* factor in having a range of strong signals that can show at 100% */
679 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
683 ret = fe->ops.read_snr(fe, &snr);
686 /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
687 /* scale the range 0 - 35*2^24 into 0 - 65535 */
688 if (state->snr >= 8960 * 0x10000)
691 *strength = state->snr / 8960;
696 static int lgdt330x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
698 /* I have no idea about this - it may not be needed */
699 fe_tune_settings->min_delay_ms = 500;
700 fe_tune_settings->step_size = 0;
701 fe_tune_settings->max_drift = 0;
705 static void lgdt330x_release(struct dvb_frontend* fe)
707 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
711 static struct dvb_frontend_ops lgdt3302_ops;
712 static struct dvb_frontend_ops lgdt3303_ops;
714 struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config,
715 struct i2c_adapter* i2c)
717 struct lgdt330x_state* state = NULL;
720 /* Allocate memory for the internal state */
721 state = kzalloc(sizeof(struct lgdt330x_state), GFP_KERNEL);
725 /* Setup the state */
726 state->config = config;
729 /* Create dvb_frontend */
730 switch (config->demod_chip) {
732 memcpy(&state->frontend.ops, &lgdt3302_ops, sizeof(struct dvb_frontend_ops));
735 memcpy(&state->frontend.ops, &lgdt3303_ops, sizeof(struct dvb_frontend_ops));
740 state->frontend.demodulator_priv = state;
742 /* Verify communication with demod chip */
743 if (i2c_read_demod_bytes(state, 2, buf, 1))
746 state->current_frequency = -1;
747 state->current_modulation = -1;
749 return &state->frontend;
753 dprintk("%s: ERROR\n",__FUNCTION__);
757 static struct dvb_frontend_ops lgdt3302_ops = {
759 .name= "LG Electronics LGDT3302 VSB/QAM Frontend",
761 .frequency_min= 54000000,
762 .frequency_max= 858000000,
763 .frequency_stepsize= 62500,
764 .symbol_rate_min = 5056941, /* QAM 64 */
765 .symbol_rate_max = 10762000, /* VSB 8 */
766 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
768 .init = lgdt330x_init,
769 .set_frontend = lgdt330x_set_parameters,
770 .get_frontend = lgdt330x_get_frontend,
771 .get_tune_settings = lgdt330x_get_tune_settings,
772 .read_status = lgdt3302_read_status,
773 .read_ber = lgdt330x_read_ber,
774 .read_signal_strength = lgdt330x_read_signal_strength,
775 .read_snr = lgdt3302_read_snr,
776 .read_ucblocks = lgdt330x_read_ucblocks,
777 .release = lgdt330x_release,
780 static struct dvb_frontend_ops lgdt3303_ops = {
782 .name= "LG Electronics LGDT3303 VSB/QAM Frontend",
784 .frequency_min= 54000000,
785 .frequency_max= 858000000,
786 .frequency_stepsize= 62500,
787 .symbol_rate_min = 5056941, /* QAM 64 */
788 .symbol_rate_max = 10762000, /* VSB 8 */
789 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
791 .init = lgdt330x_init,
792 .set_frontend = lgdt330x_set_parameters,
793 .get_frontend = lgdt330x_get_frontend,
794 .get_tune_settings = lgdt330x_get_tune_settings,
795 .read_status = lgdt3303_read_status,
796 .read_ber = lgdt330x_read_ber,
797 .read_signal_strength = lgdt330x_read_signal_strength,
798 .read_snr = lgdt3303_read_snr,
799 .read_ucblocks = lgdt330x_read_ucblocks,
800 .release = lgdt330x_release,
803 MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver");
804 MODULE_AUTHOR("Wilson Michaels");
805 MODULE_LICENSE("GPL");
807 EXPORT_SYMBOL(lgdt330x_attach);