2 Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver
4 Copyright (C) 2005 Steven Toth <stoth@hauppauge.com>
6 Support for KWorld DVB-S 100 by Vadim Catana <skystar@moldova.cc>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/slab.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
29 #include "dvb_frontend.h"
34 static int force_band;
36 #define dprintk(args...) \
38 if (debug) printk (KERN_DEBUG "cx24123: " args); \
43 struct i2c_adapter* i2c;
44 struct dvb_frontend_ops ops;
45 const struct cx24123_config* config;
47 struct dvb_frontend frontend;
53 /* Some PLL specifics for tuning */
60 /* The Demod/Tuner can't easily provide these, we cache them */
62 u32 currentsymbolrate;
65 /* Various tuner defaults need to be established for a given symbol rate Sps */
73 } cx24123_AGC_vals[] =
76 .symbolrate_low = 1000000,
77 .symbolrate_high = 4999999,
78 /* the specs recommend other values for VGA offsets,
79 but tests show they are wrong */
80 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
81 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07,
82 .FILTune = 0x27f /* 0.41 V */
85 .symbolrate_low = 5000000,
86 .symbolrate_high = 14999999,
87 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
88 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f,
89 .FILTune = 0x317 /* 0.90 V */
92 .symbolrate_low = 15000000,
93 .symbolrate_high = 45000000,
94 .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180,
95 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f,
96 .FILTune = 0x145 /* 2.70 V */
101 * Various tuner defaults need to be established for a given frequency kHz.
102 * fixme: The bounds on the bands do not match the doc in real life.
103 * fixme: Some of them have been moved, other might need adjustment.
111 } cx24123_bandselect_vals[] =
116 .freq_high = 1074999,
118 .progdata = (0 << 19) | (0 << 9) | 0x40,
124 .freq_high = 1177999,
126 .progdata = (0 << 19) | (0 << 9) | 0x80,
132 .freq_high = 1295999,
134 .progdata = (0 << 19) | (1 << 9) | 0x01,
140 .freq_high = 1431999,
142 .progdata = (0 << 19) | (1 << 9) | 0x02,
148 .freq_high = 1575999,
150 .progdata = (0 << 19) | (1 << 9) | 0x04,
156 .freq_high = 1717999,
158 .progdata = (0 << 19) | (1 << 9) | 0x08,
164 .freq_high = 1855999,
166 .progdata = (0 << 19) | (1 << 9) | 0x10,
172 .freq_high = 2035999,
174 .progdata = (0 << 19) | (1 << 9) | 0x20,
180 .freq_high = 2150000,
182 .progdata = (0 << 19) | (1 << 9) | 0x40,
189 } cx24123_regdata[] =
191 {0x00, 0x03}, /* Reset system */
192 {0x00, 0x00}, /* Clear reset */
193 {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */
194 {0x04, 0x10}, /* MPEG */
195 {0x05, 0x04}, /* MPEG */
196 {0x06, 0x31}, /* MPEG (default) */
197 {0x0b, 0x00}, /* Freq search start point (default) */
198 {0x0c, 0x00}, /* Demodulator sample gain (default) */
199 {0x0d, 0x02}, /* Frequency search range = Fsymbol / 4 (default) */
200 {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
201 {0x0f, 0xfe}, /* FEC search mask (all supported codes) */
202 {0x10, 0x01}, /* Default search inversion, no repeat (default) */
203 {0x16, 0x00}, /* Enable reading of frequency */
204 {0x17, 0x01}, /* Enable EsNO Ready Counter */
205 {0x1c, 0x80}, /* Enable error counter */
206 {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */
207 {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */
208 {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */
209 {0x29, 0x00}, /* DiSEqC LNB_DC off */
210 {0x2a, 0xb0}, /* DiSEqC Parameters (default) */
211 {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */
212 {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */
218 {0x32, 0x8c}, /* DiSEqC Parameters (default) */
219 {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */
221 {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */
222 {0x36, 0x02}, /* DiSEqC Parameters (default) */
223 {0x37, 0x3a}, /* DiSEqC Parameters (default) */
224 {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */
225 {0x44, 0x00}, /* Constellation (default) */
226 {0x45, 0x00}, /* Symbol count (default) */
227 {0x46, 0x0d}, /* Symbol rate estimator on (default) */
228 {0x56, 0x41}, /* Various (default) */
229 {0x57, 0xff}, /* Error Counter Window (default) */
230 {0x67, 0x83}, /* Non-DCII symbol clock */
233 static int cx24123_writereg(struct cx24123_state* state, int reg, int data)
235 u8 buf[] = { reg, data };
236 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
240 printk("cx24123: %s: write reg 0x%02x, value 0x%02x\n",
241 __FUNCTION__,reg, data);
243 if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
244 printk("%s: writereg error(err == %i, reg == 0x%02x,"
245 " data == 0x%02x)\n", __FUNCTION__, err, reg, data);
252 static int cx24123_writelnbreg(struct cx24123_state* state, int reg, int data)
254 u8 buf[] = { reg, data };
255 /* fixme: put the intersil addr int the config */
256 struct i2c_msg msg = { .addr = 0x08, .flags = 0, .buf = buf, .len = 2 };
260 printk("cx24123: %s: writeln addr=0x08, reg 0x%02x, value 0x%02x\n",
261 __FUNCTION__,reg, data);
263 if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
264 printk("%s: writelnbreg error (err == %i, reg == 0x%02x,"
265 " data == 0x%02x)\n", __FUNCTION__, err, reg, data);
269 /* cache the write, no way to read back */
270 state->lnbreg = data;
275 static int cx24123_readreg(struct cx24123_state* state, u8 reg)
280 struct i2c_msg msg[] = {
281 { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
282 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 }
285 ret = i2c_transfer(state->i2c, msg, 2);
288 printk("%s: reg=0x%x (error=%d)\n", __FUNCTION__, reg, ret);
293 printk("cx24123: read reg 0x%02x, value 0x%02x\n",reg, ret);
298 static int cx24123_readlnbreg(struct cx24123_state* state, u8 reg)
300 return state->lnbreg;
303 static int cx24123_set_inversion(struct cx24123_state* state, fe_spectral_inversion_t inversion)
305 u8 nom_reg = cx24123_readreg(state, 0x0e);
306 u8 auto_reg = cx24123_readreg(state, 0x10);
310 dprintk("%s: inversion off\n",__FUNCTION__);
311 cx24123_writereg(state, 0x0e, nom_reg & ~0x80);
312 cx24123_writereg(state, 0x10, auto_reg | 0x80);
315 dprintk("%s: inversion on\n",__FUNCTION__);
316 cx24123_writereg(state, 0x0e, nom_reg | 0x80);
317 cx24123_writereg(state, 0x10, auto_reg | 0x80);
320 dprintk("%s: inversion auto\n",__FUNCTION__);
321 cx24123_writereg(state, 0x10, auto_reg & ~0x80);
330 static int cx24123_get_inversion(struct cx24123_state* state, fe_spectral_inversion_t *inversion)
334 val = cx24123_readreg(state, 0x1b) >> 7;
337 dprintk("%s: read inversion off\n",__FUNCTION__);
338 *inversion = INVERSION_OFF;
340 dprintk("%s: read inversion on\n",__FUNCTION__);
341 *inversion = INVERSION_ON;
347 static int cx24123_set_fec(struct cx24123_state* state, fe_code_rate_t fec)
349 u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07;
351 if ( (fec < FEC_NONE) || (fec > FEC_AUTO) )
356 dprintk("%s: set FEC to 1/2\n",__FUNCTION__);
357 cx24123_writereg(state, 0x0e, nom_reg | 0x01);
358 cx24123_writereg(state, 0x0f, 0x02);
361 dprintk("%s: set FEC to 2/3\n",__FUNCTION__);
362 cx24123_writereg(state, 0x0e, nom_reg | 0x02);
363 cx24123_writereg(state, 0x0f, 0x04);
366 dprintk("%s: set FEC to 3/4\n",__FUNCTION__);
367 cx24123_writereg(state, 0x0e, nom_reg | 0x03);
368 cx24123_writereg(state, 0x0f, 0x08);
371 dprintk("%s: set FEC to 4/5\n",__FUNCTION__);
372 cx24123_writereg(state, 0x0e, nom_reg | 0x04);
373 cx24123_writereg(state, 0x0f, 0x10);
376 dprintk("%s: set FEC to 5/6\n",__FUNCTION__);
377 cx24123_writereg(state, 0x0e, nom_reg | 0x05);
378 cx24123_writereg(state, 0x0f, 0x20);
381 dprintk("%s: set FEC to 6/7\n",__FUNCTION__);
382 cx24123_writereg(state, 0x0e, nom_reg | 0x06);
383 cx24123_writereg(state, 0x0f, 0x40);
386 dprintk("%s: set FEC to 7/8\n",__FUNCTION__);
387 cx24123_writereg(state, 0x0e, nom_reg | 0x07);
388 cx24123_writereg(state, 0x0f, 0x80);
391 dprintk("%s: set FEC to auto\n",__FUNCTION__);
392 cx24123_writereg(state, 0x0f, 0xfe);
401 static int cx24123_get_fec(struct cx24123_state* state, fe_code_rate_t *fec)
405 ret = cx24123_readreg (state, 0x1b);
433 /* this can happen when there's no lock */
440 /* Approximation of closest integer of log2(a/b). It actually gives the
441 lowest integer i such that 2^i >= round(a/b) */
442 static u32 cx24123_int_log2(u32 a, u32 b)
444 u32 exp, nearest = 0;
446 if(a % b >= b / 2) ++div;
449 for(exp = 1; div > exp; nearest++)
455 static int cx24123_set_symbolrate(struct cx24123_state* state, u32 srate)
457 u32 tmp, sample_rate, ratio, sample_gain;
460 /* check if symbol rate is within limits */
461 if ((srate > state->ops.info.symbol_rate_max) ||
462 (srate < state->ops.info.symbol_rate_min))
465 /* choose the sampling rate high enough for the required operation,
466 while optimizing the power consumed by the demodulator */
467 if (srate < (XTAL*2)/2)
469 else if (srate < (XTAL*3)/2)
471 else if (srate < (XTAL*4)/2)
473 else if (srate < (XTAL*5)/2)
475 else if (srate < (XTAL*6)/2)
477 else if (srate < (XTAL*7)/2)
479 else if (srate < (XTAL*8)/2)
485 sample_rate = pll_mult * XTAL;
488 SYSSymbolRate[21:0] = (srate << 23) / sample_rate
490 We have to use 32 bit unsigned arithmetic without precision loss.
491 The maximum srate is 45000000 or 0x02AEA540. This number has
492 only 6 clear bits on top, hence we can shift it left only 6 bits
493 at a time. Borrowed from cx24110.c
497 ratio = tmp / sample_rate;
499 tmp = (tmp % sample_rate) << 6;
500 ratio = (ratio << 6) + (tmp / sample_rate);
502 tmp = (tmp % sample_rate) << 6;
503 ratio = (ratio << 6) + (tmp / sample_rate);
505 tmp = (tmp % sample_rate) << 5;
506 ratio = (ratio << 5) + (tmp / sample_rate);
509 cx24123_writereg(state, 0x01, pll_mult * 6);
511 cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f );
512 cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff );
513 cx24123_writereg(state, 0x0a, (ratio ) & 0xff );
515 /* also set the demodulator sample gain */
516 sample_gain = cx24123_int_log2(sample_rate, srate);
517 tmp = cx24123_readreg(state, 0x0c) & ~0xe0;
518 cx24123_writereg(state, 0x0c, tmp | sample_gain << 5);
520 dprintk("%s: srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n", __FUNCTION__, srate, ratio, sample_rate, sample_gain);
526 * Based on the required frequency and symbolrate, the tuner AGC has to be configured
527 * and the correct band selected. Calculate those values
529 static int cx24123_pll_calculate(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
531 struct cx24123_state *state = fe->demodulator_priv;
532 u32 ndiv = 0, adiv = 0, vco_div = 0;
536 int num_bands = sizeof(cx24123_bandselect_vals) / sizeof(cx24123_bandselect_vals[0]);
538 /* Defaults for low freq, low rate */
539 state->VCAarg = cx24123_AGC_vals[0].VCAprogdata;
540 state->VGAarg = cx24123_AGC_vals[0].VGAprogdata;
541 state->bandselectarg = cx24123_bandselect_vals[0].progdata;
542 vco_div = cx24123_bandselect_vals[0].VCOdivider;
544 /* For the given symbol rate, determine the VCA, VGA and FILTUNE programming bits */
545 for (i = 0; i < sizeof(cx24123_AGC_vals) / sizeof(cx24123_AGC_vals[0]); i++)
547 if ((cx24123_AGC_vals[i].symbolrate_low <= p->u.qpsk.symbol_rate) &&
548 (cx24123_AGC_vals[i].symbolrate_high >= p->u.qpsk.symbol_rate) ) {
549 state->VCAarg = cx24123_AGC_vals[i].VCAprogdata;
550 state->VGAarg = cx24123_AGC_vals[i].VGAprogdata;
551 state->FILTune = cx24123_AGC_vals[i].FILTune;
555 /* determine the band to use */
556 if(force_band < 1 || force_band > num_bands)
558 for (i = 0; i < num_bands; i++)
560 if ((cx24123_bandselect_vals[i].freq_low <= p->frequency) &&
561 (cx24123_bandselect_vals[i].freq_high >= p->frequency) )
566 band = force_band - 1;
568 state->bandselectarg = cx24123_bandselect_vals[band].progdata;
569 vco_div = cx24123_bandselect_vals[band].VCOdivider;
571 /* determine the charge pump current */
572 if ( p->frequency < (cx24123_bandselect_vals[band].freq_low + cx24123_bandselect_vals[band].freq_high)/2 )
577 /* Determine the N/A dividers for the requested lband freq (in kHz). */
578 /* Note: the reference divider R=10, frequency is in KHz, XTAL is in Hz */
579 ndiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) / 32) & 0x1ff;
580 adiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) % 32) & 0x1f;
585 /* control bits 11, refdiv 11, charge pump polarity 1, charge pump current, ndiv, adiv */
586 state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (pump << 14) | (ndiv << 5) | adiv;
592 * Tuner data is 21 bits long, must be left-aligned in data.
593 * Tuner cx24109 is written through a dedicated 3wire interface on the demod chip.
595 static int cx24123_pll_writereg(struct dvb_frontend* fe, struct dvb_frontend_parameters *p, u32 data)
597 struct cx24123_state *state = fe->demodulator_priv;
598 unsigned long timeout;
600 dprintk("%s: pll writereg called, data=0x%08x\n",__FUNCTION__,data);
602 /* align the 21 bytes into to bit23 boundary */
605 /* Reset the demod pll word length to 0x15 bits */
606 cx24123_writereg(state, 0x21, 0x15);
608 /* write the msb 8 bits, wait for the send to be completed */
609 timeout = jiffies + msecs_to_jiffies(40);
610 cx24123_writereg(state, 0x22, (data >> 16) & 0xff);
611 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
612 if (time_after(jiffies, timeout)) {
613 printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__);
619 /* send another 8 bytes, wait for the send to be completed */
620 timeout = jiffies + msecs_to_jiffies(40);
621 cx24123_writereg(state, 0x22, (data>>8) & 0xff );
622 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
623 if (time_after(jiffies, timeout)) {
624 printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__);
630 /* send the lower 5 bits of this byte, padded with 3 LBB, wait for the send to be completed */
631 timeout = jiffies + msecs_to_jiffies(40);
632 cx24123_writereg(state, 0x22, (data) & 0xff );
633 while ((cx24123_readreg(state, 0x20) & 0x80)) {
634 if (time_after(jiffies, timeout)) {
635 printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__);
641 /* Trigger the demod to configure the tuner */
642 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) | 2);
643 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) & 0xfd);
648 static int cx24123_pll_tune(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
650 struct cx24123_state *state = fe->demodulator_priv;
653 dprintk("frequency=%i\n", p->frequency);
655 if (cx24123_pll_calculate(fe, p) != 0) {
656 printk("%s: cx24123_pll_calcutate failed\n",__FUNCTION__);
660 /* Write the new VCO/VGA */
661 cx24123_pll_writereg(fe, p, state->VCAarg);
662 cx24123_pll_writereg(fe, p, state->VGAarg);
664 /* Write the new bandselect and pll args */
665 cx24123_pll_writereg(fe, p, state->bandselectarg);
666 cx24123_pll_writereg(fe, p, state->pllarg);
668 /* set the FILTUNE voltage */
669 val = cx24123_readreg(state, 0x28) & ~0x3;
670 cx24123_writereg(state, 0x27, state->FILTune >> 2);
671 cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3));
673 dprintk("%s: pll tune VCA=%d, band=%d, pll=%d\n",__FUNCTION__,state->VCAarg,
674 state->bandselectarg,state->pllarg);
679 static int cx24123_initfe(struct dvb_frontend* fe)
681 struct cx24123_state *state = fe->demodulator_priv;
684 dprintk("%s: init frontend\n",__FUNCTION__);
686 /* Configure the demod to a good set of defaults */
687 for (i = 0; i < sizeof(cx24123_regdata) / sizeof(cx24123_regdata[0]); i++)
688 cx24123_writereg(state, cx24123_regdata[i].reg, cx24123_regdata[i].data);
690 if (state->config->pll_init)
691 state->config->pll_init(fe);
693 /* Configure the LNB for 14V */
694 if (state->config->use_isl6421)
695 cx24123_writelnbreg(state, 0x0, 0x2a);
700 static int cx24123_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
702 struct cx24123_state *state = fe->demodulator_priv;
705 switch (state->config->use_isl6421) {
709 val = cx24123_readlnbreg(state, 0x0);
713 dprintk("%s: isl6421 voltage = 13V\n",__FUNCTION__);
714 return cx24123_writelnbreg(state, 0x0, val & 0x32); /* V 13v */
716 dprintk("%s: isl6421 voltage = 18V\n",__FUNCTION__);
717 return cx24123_writelnbreg(state, 0x0, val | 0x04); /* H 18v */
718 case SEC_VOLTAGE_OFF:
719 dprintk("%s: isl5421 voltage off\n",__FUNCTION__);
720 return cx24123_writelnbreg(state, 0x0, val & 0x30);
727 val = cx24123_readreg(state, 0x29);
731 dprintk("%s: setting voltage 13V\n", __FUNCTION__);
732 if (state->config->enable_lnb_voltage)
733 state->config->enable_lnb_voltage(fe, 1);
734 return cx24123_writereg(state, 0x29, val | 0x80);
736 dprintk("%s: setting voltage 18V\n", __FUNCTION__);
737 if (state->config->enable_lnb_voltage)
738 state->config->enable_lnb_voltage(fe, 1);
739 return cx24123_writereg(state, 0x29, val & 0x7f);
740 case SEC_VOLTAGE_OFF:
741 dprintk("%s: setting voltage off\n", __FUNCTION__);
742 if (state->config->enable_lnb_voltage)
743 state->config->enable_lnb_voltage(fe, 0);
753 /* wait for diseqc queue to become ready (or timeout) */
754 static void cx24123_wait_for_diseqc(struct cx24123_state *state)
756 unsigned long timeout = jiffies + msecs_to_jiffies(200);
757 while (!(cx24123_readreg(state, 0x29) & 0x40)) {
758 if(time_after(jiffies, timeout)) {
759 printk("%s: diseqc queue not ready, command may be lost.\n", __FUNCTION__);
766 static int cx24123_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
768 struct cx24123_state *state = fe->demodulator_priv;
771 dprintk("%s:\n",__FUNCTION__);
773 /* check if continuous tone has been stopped */
774 if (state->config->use_isl6421)
775 val = cx24123_readlnbreg(state, 0x00) & 0x10;
777 val = cx24123_readreg(state, 0x29) & 0x10;
781 printk("%s: ERROR: attempt to send diseqc command before tone is off\n", __FUNCTION__);
785 /* wait for diseqc queue ready */
786 cx24123_wait_for_diseqc(state);
788 /* select tone mode */
789 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xf8);
791 for (i = 0; i < cmd->msg_len; i++)
792 cx24123_writereg(state, 0x2C + i, cmd->msg[i]);
794 val = cx24123_readreg(state, 0x29);
795 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) | ((cmd->msg_len-3) & 3));
797 /* wait for diseqc message to finish sending */
798 cx24123_wait_for_diseqc(state);
803 static int cx24123_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
805 struct cx24123_state *state = fe->demodulator_priv;
808 dprintk("%s:\n", __FUNCTION__);
810 /* check if continuous tone has been stoped */
811 if (state->config->use_isl6421)
812 val = cx24123_readlnbreg(state, 0x00) & 0x10;
814 val = cx24123_readreg(state, 0x29) & 0x10;
818 printk("%s: ERROR: attempt to send diseqc command before tone is off\n", __FUNCTION__);
822 cx24123_wait_for_diseqc(state);
824 /* select tone mode */
825 val = cx24123_readreg(state, 0x2a) & 0xf8;
826 cx24123_writereg(state, 0x2a, val | 0x04);
828 val = cx24123_readreg(state, 0x29);
830 if (burst == SEC_MINI_A)
831 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00));
832 else if (burst == SEC_MINI_B)
833 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08));
837 cx24123_wait_for_diseqc(state);
842 static int cx24123_read_status(struct dvb_frontend* fe, fe_status_t* status)
844 struct cx24123_state *state = fe->demodulator_priv;
846 int sync = cx24123_readreg(state, 0x14);
847 int lock = cx24123_readreg(state, 0x20);
851 *status |= FE_HAS_SIGNAL;
853 *status |= FE_HAS_CARRIER;
855 *status |= FE_HAS_VITERBI;
857 *status |= FE_HAS_SYNC;
859 *status |= FE_HAS_LOCK;
865 * Configured to return the measurement of errors in blocks, because no UCBLOCKS value
866 * is available, so this value doubles up to satisfy both measurements
868 static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber)
870 struct cx24123_state *state = fe->demodulator_priv;
873 ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
874 (cx24123_readreg(state, 0x1d) << 8 |
875 cx24123_readreg(state, 0x1e));
877 /* Do the signal quality processing here, it's derived from the BER. */
878 /* Scale the BER from a 24bit to a SNR 16 bit where higher = better */
879 if (state->lastber < 5000)
880 state->snr = 655*100;
881 else if ( (state->lastber >= 5000) && (state->lastber < 55000) )
883 else if ( (state->lastber >= 55000) && (state->lastber < 150000) )
885 else if ( (state->lastber >= 150000) && (state->lastber < 250000) )
887 else if ( (state->lastber >= 250000) && (state->lastber < 450000) )
892 dprintk("%s: BER = %d, S/N index = %d\n",__FUNCTION__,state->lastber, state->snr);
894 *ber = state->lastber;
899 static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
901 struct cx24123_state *state = fe->demodulator_priv;
902 *signal_strength = cx24123_readreg(state, 0x3b) << 8; /* larger = better */
904 dprintk("%s: Signal strength = %d\n",__FUNCTION__,*signal_strength);
909 static int cx24123_read_snr(struct dvb_frontend* fe, u16* snr)
911 struct cx24123_state *state = fe->demodulator_priv;
914 dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr);
919 static int cx24123_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
921 struct cx24123_state *state = fe->demodulator_priv;
922 *ucblocks = state->lastber;
924 dprintk("%s: ucblocks (ber) = %d\n",__FUNCTION__,*ucblocks);
929 static int cx24123_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
931 struct cx24123_state *state = fe->demodulator_priv;
933 dprintk("%s: set_frontend\n",__FUNCTION__);
935 if (state->config->set_ts_params)
936 state->config->set_ts_params(fe, 0);
938 state->currentfreq=p->frequency;
939 state->currentsymbolrate = p->u.qpsk.symbol_rate;
941 cx24123_set_inversion(state, p->inversion);
942 cx24123_set_fec(state, p->u.qpsk.fec_inner);
943 cx24123_set_symbolrate(state, p->u.qpsk.symbol_rate);
944 cx24123_pll_tune(fe, p);
946 /* Enable automatic aquisition and reset cycle */
947 cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07));
948 cx24123_writereg(state, 0x00, 0x10);
949 cx24123_writereg(state, 0x00, 0);
954 static int cx24123_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
956 struct cx24123_state *state = fe->demodulator_priv;
958 dprintk("%s: get_frontend\n",__FUNCTION__);
960 if (cx24123_get_inversion(state, &p->inversion) != 0) {
961 printk("%s: Failed to get inversion status\n",__FUNCTION__);
964 if (cx24123_get_fec(state, &p->u.qpsk.fec_inner) != 0) {
965 printk("%s: Failed to get fec status\n",__FUNCTION__);
968 p->frequency = state->currentfreq;
969 p->u.qpsk.symbol_rate = state->currentsymbolrate;
974 static int cx24123_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
976 struct cx24123_state *state = fe->demodulator_priv;
979 switch (state->config->use_isl6421) {
982 val = cx24123_readlnbreg(state, 0x0);
986 dprintk("%s: isl6421 sec tone on\n",__FUNCTION__);
987 return cx24123_writelnbreg(state, 0x0, val | 0x10);
989 dprintk("%s: isl6421 sec tone off\n",__FUNCTION__);
990 return cx24123_writelnbreg(state, 0x0, val & 0x2f);
992 printk("%s: CASE reached default with tone=%d\n", __FUNCTION__, tone);
998 val = cx24123_readreg(state, 0x29);
1002 dprintk("%s: setting tone on\n", __FUNCTION__);
1003 return cx24123_writereg(state, 0x29, val | 0x10);
1005 dprintk("%s: setting tone off\n",__FUNCTION__);
1006 return cx24123_writereg(state, 0x29, val & 0xef);
1008 printk("%s: CASE reached default with tone=%d\n", __FUNCTION__, tone);
1016 static void cx24123_release(struct dvb_frontend* fe)
1018 struct cx24123_state* state = fe->demodulator_priv;
1019 dprintk("%s\n",__FUNCTION__);
1023 static struct dvb_frontend_ops cx24123_ops;
1025 struct dvb_frontend* cx24123_attach(const struct cx24123_config* config,
1026 struct i2c_adapter* i2c)
1028 struct cx24123_state* state = NULL;
1031 dprintk("%s\n",__FUNCTION__);
1033 /* allocate memory for the internal state */
1034 state = kmalloc(sizeof(struct cx24123_state), GFP_KERNEL);
1035 if (state == NULL) {
1036 printk("Unable to kmalloc\n");
1040 /* setup the state */
1041 state->config = config;
1043 memcpy(&state->ops, &cx24123_ops, sizeof(struct dvb_frontend_ops));
1049 state->bandselectarg = 0;
1051 state->currentfreq = 0;
1052 state->currentsymbolrate = 0;
1054 /* check if the demod is there */
1055 ret = cx24123_readreg(state, 0x00);
1056 if ((ret != 0xd1) && (ret != 0xe1)) {
1057 printk("Version != d1 or e1\n");
1061 /* create dvb_frontend */
1062 state->frontend.ops = &state->ops;
1063 state->frontend.demodulator_priv = state;
1064 return &state->frontend;
1072 static struct dvb_frontend_ops cx24123_ops = {
1075 .name = "Conexant CX24123/CX24109",
1077 .frequency_min = 950000,
1078 .frequency_max = 2150000,
1079 .frequency_stepsize = 1011, /* kHz for QPSK frontends */
1080 .frequency_tolerance = 5000,
1081 .symbol_rate_min = 1000000,
1082 .symbol_rate_max = 45000000,
1083 .caps = FE_CAN_INVERSION_AUTO |
1084 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1085 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1086 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1087 FE_CAN_QPSK | FE_CAN_RECOVER
1090 .release = cx24123_release,
1092 .init = cx24123_initfe,
1093 .set_frontend = cx24123_set_frontend,
1094 .get_frontend = cx24123_get_frontend,
1095 .read_status = cx24123_read_status,
1096 .read_ber = cx24123_read_ber,
1097 .read_signal_strength = cx24123_read_signal_strength,
1098 .read_snr = cx24123_read_snr,
1099 .read_ucblocks = cx24123_read_ucblocks,
1100 .diseqc_send_master_cmd = cx24123_send_diseqc_msg,
1101 .diseqc_send_burst = cx24123_diseqc_send_burst,
1102 .set_tone = cx24123_set_tone,
1103 .set_voltage = cx24123_set_voltage,
1106 module_param(debug, int, 0644);
1107 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
1109 module_param(force_band, int, 0644);
1110 MODULE_PARM_DESC(force_band, "Force a specific band select (1-9, default:off).");
1112 MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24123/cx24109 hardware");
1113 MODULE_AUTHOR("Steven Toth");
1114 MODULE_LICENSE("GPL");
1116 EXPORT_SYMBOL(cx24123_attach);