2 * Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver
4 * Copyright (C) 2005 Steven Toth <stoth@linuxtv.org>
6 * Support for KWorld DVB-S 100 by Vadim Catana <skystar@moldova.cc>
8 * Support for CX24123/CX24113-NIM by Patrick Boettcher <pb@linuxtv.org>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <linux/slab.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
30 #include "dvb_frontend.h"
35 static int force_band;
36 module_param(force_band, int, 0644);
37 MODULE_PARM_DESC(force_band, "Force a specific band select "\
38 "(1-9, default:off).");
41 module_param(debug, int, 0644);
42 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
44 #define info(args...) do { printk(KERN_INFO "CX24123: " args); } while (0)
45 #define err(args...) do { printk(KERN_ERR "CX24123: " args); } while (0)
47 #define dprintk(args...) \
50 printk(KERN_DEBUG "CX24123: %s: ", __func__); \
55 struct cx24123_state {
56 struct i2c_adapter *i2c;
57 const struct cx24123_config *config;
59 struct dvb_frontend frontend;
61 /* Some PLL specifics for tuning */
68 struct i2c_adapter tuner_i2c_adapter;
72 /* The Demod/Tuner can't easily provide these, we cache them */
74 u32 currentsymbolrate;
77 /* Various tuner defaults need to be established for a given symbol rate Sps */
78 static struct cx24123_AGC_val {
84 } cx24123_AGC_vals[] =
87 .symbolrate_low = 1000000,
88 .symbolrate_high = 4999999,
89 /* the specs recommend other values for VGA offsets,
90 but tests show they are wrong */
91 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
92 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07,
93 .FILTune = 0x27f /* 0.41 V */
96 .symbolrate_low = 5000000,
97 .symbolrate_high = 14999999,
98 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
99 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f,
100 .FILTune = 0x317 /* 0.90 V */
103 .symbolrate_low = 15000000,
104 .symbolrate_high = 45000000,
105 .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180,
106 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f,
107 .FILTune = 0x145 /* 2.70 V */
112 * Various tuner defaults need to be established for a given frequency kHz.
113 * fixme: The bounds on the bands do not match the doc in real life.
114 * fixme: Some of them have been moved, other might need adjustment.
116 static struct cx24123_bandselect_val {
121 } cx24123_bandselect_vals[] =
126 .freq_high = 1074999,
128 .progdata = (0 << 19) | (0 << 9) | 0x40,
134 .freq_high = 1177999,
136 .progdata = (0 << 19) | (0 << 9) | 0x80,
142 .freq_high = 1295999,
144 .progdata = (0 << 19) | (1 << 9) | 0x01,
150 .freq_high = 1431999,
152 .progdata = (0 << 19) | (1 << 9) | 0x02,
158 .freq_high = 1575999,
160 .progdata = (0 << 19) | (1 << 9) | 0x04,
166 .freq_high = 1717999,
168 .progdata = (0 << 19) | (1 << 9) | 0x08,
174 .freq_high = 1855999,
176 .progdata = (0 << 19) | (1 << 9) | 0x10,
182 .freq_high = 2035999,
184 .progdata = (0 << 19) | (1 << 9) | 0x20,
190 .freq_high = 2150000,
192 .progdata = (0 << 19) | (1 << 9) | 0x40,
199 } cx24123_regdata[] =
201 {0x00, 0x03}, /* Reset system */
202 {0x00, 0x00}, /* Clear reset */
203 {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */
204 {0x04, 0x10}, /* MPEG */
205 {0x05, 0x04}, /* MPEG */
206 {0x06, 0x31}, /* MPEG (default) */
207 {0x0b, 0x00}, /* Freq search start point (default) */
208 {0x0c, 0x00}, /* Demodulator sample gain (default) */
209 {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */
210 {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
211 {0x0f, 0xfe}, /* FEC search mask (all supported codes) */
212 {0x10, 0x01}, /* Default search inversion, no repeat (default) */
213 {0x16, 0x00}, /* Enable reading of frequency */
214 {0x17, 0x01}, /* Enable EsNO Ready Counter */
215 {0x1c, 0x80}, /* Enable error counter */
216 {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */
217 {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */
218 {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */
219 {0x29, 0x00}, /* DiSEqC LNB_DC off */
220 {0x2a, 0xb0}, /* DiSEqC Parameters (default) */
221 {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */
222 {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */
228 {0x32, 0x8c}, /* DiSEqC Parameters (default) */
229 {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */
231 {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */
232 {0x36, 0x02}, /* DiSEqC Parameters (default) */
233 {0x37, 0x3a}, /* DiSEqC Parameters (default) */
234 {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */
235 {0x44, 0x00}, /* Constellation (default) */
236 {0x45, 0x00}, /* Symbol count (default) */
237 {0x46, 0x0d}, /* Symbol rate estimator on (default) */
238 {0x56, 0xc1}, /* Error Counter = Viterbi BER */
239 {0x57, 0xff}, /* Error Counter Window (default) */
240 {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */
241 {0x67, 0x83}, /* Non-DCII symbol clock */
244 static int cx24123_i2c_writereg(struct cx24123_state *state,
245 u8 i2c_addr, int reg, int data)
247 u8 buf[] = { reg, data };
248 struct i2c_msg msg = {
249 .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
253 /* printk(KERN_DEBUG "wr(%02x): %02x %02x\n", i2c_addr, reg, data); */
255 err = i2c_transfer(state->i2c, &msg, 1);
257 printk("%s: writereg error(err == %i, reg == 0x%02x,"
258 " data == 0x%02x)\n", __func__, err, reg, data);
265 static int cx24123_i2c_readreg(struct cx24123_state *state, u8 i2c_addr, u8 reg)
269 struct i2c_msg msg[] = {
270 { .addr = i2c_addr, .flags = 0, .buf = ®, .len = 1 },
271 { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &b, .len = 1 }
274 ret = i2c_transfer(state->i2c, msg, 2);
277 err("%s: reg=0x%x (error=%d)\n", __func__, reg, ret);
281 /* printk(KERN_DEBUG "rd(%02x): %02x %02x\n", i2c_addr, reg, b); */
286 #define cx24123_readreg(state, reg) \
287 cx24123_i2c_readreg(state, state->config->demod_address, reg)
288 #define cx24123_writereg(state, reg, val) \
289 cx24123_i2c_writereg(state, state->config->demod_address, reg, val)
291 static int cx24123_set_inversion(struct cx24123_state *state,
292 fe_spectral_inversion_t inversion)
294 u8 nom_reg = cx24123_readreg(state, 0x0e);
295 u8 auto_reg = cx24123_readreg(state, 0x10);
299 dprintk("inversion off\n");
300 cx24123_writereg(state, 0x0e, nom_reg & ~0x80);
301 cx24123_writereg(state, 0x10, auto_reg | 0x80);
304 dprintk("inversion on\n");
305 cx24123_writereg(state, 0x0e, nom_reg | 0x80);
306 cx24123_writereg(state, 0x10, auto_reg | 0x80);
309 dprintk("inversion auto\n");
310 cx24123_writereg(state, 0x10, auto_reg & ~0x80);
319 static int cx24123_get_inversion(struct cx24123_state *state,
320 fe_spectral_inversion_t *inversion)
324 val = cx24123_readreg(state, 0x1b) >> 7;
327 dprintk("read inversion off\n");
328 *inversion = INVERSION_OFF;
330 dprintk("read inversion on\n");
331 *inversion = INVERSION_ON;
337 static int cx24123_set_fec(struct cx24123_state *state, fe_code_rate_t fec)
339 u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07;
341 if ((fec < FEC_NONE) || (fec > FEC_AUTO))
344 /* Set the soft decision threshold */
346 cx24123_writereg(state, 0x43,
347 cx24123_readreg(state, 0x43) | 0x01);
349 cx24123_writereg(state, 0x43,
350 cx24123_readreg(state, 0x43) & ~0x01);
354 dprintk("set FEC to 1/2\n");
355 cx24123_writereg(state, 0x0e, nom_reg | 0x01);
356 cx24123_writereg(state, 0x0f, 0x02);
359 dprintk("set FEC to 2/3\n");
360 cx24123_writereg(state, 0x0e, nom_reg | 0x02);
361 cx24123_writereg(state, 0x0f, 0x04);
364 dprintk("set FEC to 3/4\n");
365 cx24123_writereg(state, 0x0e, nom_reg | 0x03);
366 cx24123_writereg(state, 0x0f, 0x08);
369 dprintk("set FEC to 4/5\n");
370 cx24123_writereg(state, 0x0e, nom_reg | 0x04);
371 cx24123_writereg(state, 0x0f, 0x10);
374 dprintk("set FEC to 5/6\n");
375 cx24123_writereg(state, 0x0e, nom_reg | 0x05);
376 cx24123_writereg(state, 0x0f, 0x20);
379 dprintk("set FEC to 6/7\n");
380 cx24123_writereg(state, 0x0e, nom_reg | 0x06);
381 cx24123_writereg(state, 0x0f, 0x40);
384 dprintk("set FEC to 7/8\n");
385 cx24123_writereg(state, 0x0e, nom_reg | 0x07);
386 cx24123_writereg(state, 0x0f, 0x80);
389 dprintk("set FEC to auto\n");
390 cx24123_writereg(state, 0x0f, 0xfe);
399 static int cx24123_get_fec(struct cx24123_state *state, fe_code_rate_t *fec)
403 ret = cx24123_readreg(state, 0x1b);
431 /* this can happen when there's no lock */
438 /* Approximation of closest integer of log2(a/b). It actually gives the
439 lowest integer i such that 2^i >= round(a/b) */
440 static u32 cx24123_int_log2(u32 a, u32 b)
442 u32 exp, nearest = 0;
446 if (div < (1 << 31)) {
447 for (exp = 1; div > exp; nearest++)
453 static int cx24123_set_symbolrate(struct cx24123_state *state, u32 srate)
455 u32 tmp, sample_rate, ratio, sample_gain;
458 /* check if symbol rate is within limits */
459 if ((srate > state->frontend.ops.info.symbol_rate_max) ||
460 (srate < state->frontend.ops.info.symbol_rate_min))
463 /* choose the sampling rate high enough for the required operation,
464 while optimizing the power consumed by the demodulator */
465 if (srate < (XTAL*2)/2)
467 else if (srate < (XTAL*3)/2)
469 else if (srate < (XTAL*4)/2)
471 else if (srate < (XTAL*5)/2)
473 else if (srate < (XTAL*6)/2)
475 else if (srate < (XTAL*7)/2)
477 else if (srate < (XTAL*8)/2)
483 sample_rate = pll_mult * XTAL;
486 SYSSymbolRate[21:0] = (srate << 23) / sample_rate
488 We have to use 32 bit unsigned arithmetic without precision loss.
489 The maximum srate is 45000000 or 0x02AEA540. This number has
490 only 6 clear bits on top, hence we can shift it left only 6 bits
491 at a time. Borrowed from cx24110.c
495 ratio = tmp / sample_rate;
497 tmp = (tmp % sample_rate) << 6;
498 ratio = (ratio << 6) + (tmp / sample_rate);
500 tmp = (tmp % sample_rate) << 6;
501 ratio = (ratio << 6) + (tmp / sample_rate);
503 tmp = (tmp % sample_rate) << 5;
504 ratio = (ratio << 5) + (tmp / sample_rate);
507 cx24123_writereg(state, 0x01, pll_mult * 6);
509 cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f);
510 cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff);
511 cx24123_writereg(state, 0x0a, ratio & 0xff);
513 /* also set the demodulator sample gain */
514 sample_gain = cx24123_int_log2(sample_rate, srate);
515 tmp = cx24123_readreg(state, 0x0c) & ~0xe0;
516 cx24123_writereg(state, 0x0c, tmp | sample_gain << 5);
518 dprintk("srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n",
519 srate, ratio, sample_rate, sample_gain);
525 * Based on the required frequency and symbolrate, the tuner AGC has
526 * to be configured and the correct band selected.
527 * Calculate those values.
529 static int cx24123_pll_calculate(struct dvb_frontend *fe,
530 struct dvb_frontend_parameters *p)
532 struct cx24123_state *state = fe->demodulator_priv;
533 u32 ndiv = 0, adiv = 0, vco_div = 0;
537 int num_bands = ARRAY_SIZE(cx24123_bandselect_vals);
538 struct cx24123_bandselect_val *bsv = NULL;
539 struct cx24123_AGC_val *agcv = NULL;
541 /* Defaults for low freq, low rate */
542 state->VCAarg = cx24123_AGC_vals[0].VCAprogdata;
543 state->VGAarg = cx24123_AGC_vals[0].VGAprogdata;
544 state->bandselectarg = cx24123_bandselect_vals[0].progdata;
545 vco_div = cx24123_bandselect_vals[0].VCOdivider;
547 /* For the given symbol rate, determine the VCA, VGA and
548 * FILTUNE programming bits */
549 for (i = 0; i < ARRAY_SIZE(cx24123_AGC_vals); i++) {
550 agcv = &cx24123_AGC_vals[i];
551 if ((agcv->symbolrate_low <= p->u.qpsk.symbol_rate) &&
552 (agcv->symbolrate_high >= p->u.qpsk.symbol_rate)) {
553 state->VCAarg = agcv->VCAprogdata;
554 state->VGAarg = agcv->VGAprogdata;
555 state->FILTune = agcv->FILTune;
559 /* determine the band to use */
560 if (force_band < 1 || force_band > num_bands) {
561 for (i = 0; i < num_bands; i++) {
562 bsv = &cx24123_bandselect_vals[i];
563 if ((bsv->freq_low <= p->frequency) &&
564 (bsv->freq_high >= p->frequency))
568 band = force_band - 1;
570 state->bandselectarg = cx24123_bandselect_vals[band].progdata;
571 vco_div = cx24123_bandselect_vals[band].VCOdivider;
573 /* determine the charge pump current */
574 if (p->frequency < (cx24123_bandselect_vals[band].freq_low +
575 cx24123_bandselect_vals[band].freq_high) / 2)
580 /* Determine the N/A dividers for the requested lband freq (in kHz). */
581 /* Note: the reference divider R=10, frequency is in KHz,
583 ndiv = (((p->frequency * vco_div * 10) /
584 (2 * XTAL / 1000)) / 32) & 0x1ff;
585 adiv = (((p->frequency * vco_div * 10) /
586 (2 * XTAL / 1000)) % 32) & 0x1f;
588 if (adiv == 0 && ndiv > 0)
591 /* control bits 11, refdiv 11, charge pump polarity 1,
592 * charge pump current, ndiv, adiv */
593 state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) |
594 (pump << 14) | (ndiv << 5) | adiv;
600 * Tuner data is 21 bits long, must be left-aligned in data.
601 * Tuner cx24109 is written through a dedicated 3wire interface
604 static int cx24123_pll_writereg(struct dvb_frontend *fe,
605 struct dvb_frontend_parameters *p, u32 data)
607 struct cx24123_state *state = fe->demodulator_priv;
608 unsigned long timeout;
610 dprintk("pll writereg called, data=0x%08x\n", data);
612 /* align the 21 bytes into to bit23 boundary */
615 /* Reset the demod pll word length to 0x15 bits */
616 cx24123_writereg(state, 0x21, 0x15);
618 /* write the msb 8 bits, wait for the send to be completed */
619 timeout = jiffies + msecs_to_jiffies(40);
620 cx24123_writereg(state, 0x22, (data >> 16) & 0xff);
621 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
622 if (time_after(jiffies, timeout)) {
623 err("%s: demodulator is not responding, "\
624 "possibly hung, aborting.\n", __func__);
630 /* send another 8 bytes, wait for the send to be completed */
631 timeout = jiffies + msecs_to_jiffies(40);
632 cx24123_writereg(state, 0x22, (data >> 8) & 0xff);
633 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
634 if (time_after(jiffies, timeout)) {
635 err("%s: demodulator is not responding, "\
636 "possibly hung, aborting.\n", __func__);
642 /* send the lower 5 bits of this byte, padded with 3 LBB,
643 * wait for the send to be completed */
644 timeout = jiffies + msecs_to_jiffies(40);
645 cx24123_writereg(state, 0x22, (data) & 0xff);
646 while ((cx24123_readreg(state, 0x20) & 0x80)) {
647 if (time_after(jiffies, timeout)) {
648 err("%s: demodulator is not responding," \
649 "possibly hung, aborting.\n", __func__);
655 /* Trigger the demod to configure the tuner */
656 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) | 2);
657 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) & 0xfd);
662 static int cx24123_pll_tune(struct dvb_frontend *fe,
663 struct dvb_frontend_parameters *p)
665 struct cx24123_state *state = fe->demodulator_priv;
668 dprintk("frequency=%i\n", p->frequency);
670 if (cx24123_pll_calculate(fe, p) != 0) {
671 err("%s: cx24123_pll_calcutate failed\n", __func__);
675 /* Write the new VCO/VGA */
676 cx24123_pll_writereg(fe, p, state->VCAarg);
677 cx24123_pll_writereg(fe, p, state->VGAarg);
679 /* Write the new bandselect and pll args */
680 cx24123_pll_writereg(fe, p, state->bandselectarg);
681 cx24123_pll_writereg(fe, p, state->pllarg);
683 /* set the FILTUNE voltage */
684 val = cx24123_readreg(state, 0x28) & ~0x3;
685 cx24123_writereg(state, 0x27, state->FILTune >> 2);
686 cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3));
688 dprintk("pll tune VCA=%d, band=%d, pll=%d\n", state->VCAarg,
689 state->bandselectarg, state->pllarg);
697 * [7:7] = BTI enabled
698 * [6:6] = I2C repeater enabled
699 * [5:5] = I2C repeater start
703 /* mode == 1 -> i2c-repeater, 0 -> bti */
704 static int cx24123_repeater_mode(struct cx24123_state *state, u8 mode, u8 start)
706 u8 r = cx24123_readreg(state, 0x23) & 0x1e;
708 r |= (1 << 6) | (start << 5);
710 r |= (1 << 7) | (start);
711 return cx24123_writereg(state, 0x23, r);
714 static int cx24123_initfe(struct dvb_frontend *fe)
716 struct cx24123_state *state = fe->demodulator_priv;
719 dprintk("init frontend\n");
721 /* Configure the demod to a good set of defaults */
722 for (i = 0; i < ARRAY_SIZE(cx24123_regdata); i++)
723 cx24123_writereg(state, cx24123_regdata[i].reg,
724 cx24123_regdata[i].data);
726 /* Set the LNB polarity */
727 if (state->config->lnb_polarity)
728 cx24123_writereg(state, 0x32,
729 cx24123_readreg(state, 0x32) | 0x02);
731 if (state->config->dont_use_pll)
732 cx24123_repeater_mode(state, 1, 0);
737 static int cx24123_set_voltage(struct dvb_frontend *fe,
738 fe_sec_voltage_t voltage)
740 struct cx24123_state *state = fe->demodulator_priv;
743 val = cx24123_readreg(state, 0x29) & ~0x40;
747 dprintk("setting voltage 13V\n");
748 return cx24123_writereg(state, 0x29, val & 0x7f);
750 dprintk("setting voltage 18V\n");
751 return cx24123_writereg(state, 0x29, val | 0x80);
752 case SEC_VOLTAGE_OFF:
753 /* already handled in cx88-dvb */
762 /* wait for diseqc queue to become ready (or timeout) */
763 static void cx24123_wait_for_diseqc(struct cx24123_state *state)
765 unsigned long timeout = jiffies + msecs_to_jiffies(200);
766 while (!(cx24123_readreg(state, 0x29) & 0x40)) {
767 if (time_after(jiffies, timeout)) {
768 err("%s: diseqc queue not ready, " \
769 "command may be lost.\n", __func__);
776 static int cx24123_send_diseqc_msg(struct dvb_frontend *fe,
777 struct dvb_diseqc_master_cmd *cmd)
779 struct cx24123_state *state = fe->demodulator_priv;
784 /* stop continuous tone if enabled */
785 tone = cx24123_readreg(state, 0x29);
787 cx24123_writereg(state, 0x29, tone & ~0x50);
789 /* wait for diseqc queue ready */
790 cx24123_wait_for_diseqc(state);
792 /* select tone mode */
793 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
795 for (i = 0; i < cmd->msg_len; i++)
796 cx24123_writereg(state, 0x2C + i, cmd->msg[i]);
798 val = cx24123_readreg(state, 0x29);
799 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) |
800 ((cmd->msg_len-3) & 3));
802 /* wait for diseqc message to finish sending */
803 cx24123_wait_for_diseqc(state);
805 /* restart continuous tone if enabled */
807 cx24123_writereg(state, 0x29, tone & ~0x40);
812 static int cx24123_diseqc_send_burst(struct dvb_frontend *fe,
813 fe_sec_mini_cmd_t burst)
815 struct cx24123_state *state = fe->demodulator_priv;
820 /* stop continuous tone if enabled */
821 tone = cx24123_readreg(state, 0x29);
823 cx24123_writereg(state, 0x29, tone & ~0x50);
825 /* wait for diseqc queue ready */
826 cx24123_wait_for_diseqc(state);
828 /* select tone mode */
829 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) | 0x4);
831 val = cx24123_readreg(state, 0x29);
832 if (burst == SEC_MINI_A)
833 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00));
834 else if (burst == SEC_MINI_B)
835 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08));
839 cx24123_wait_for_diseqc(state);
840 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
842 /* restart continuous tone if enabled */
844 cx24123_writereg(state, 0x29, tone & ~0x40);
849 static int cx24123_read_status(struct dvb_frontend *fe, fe_status_t *status)
851 struct cx24123_state *state = fe->demodulator_priv;
852 int sync = cx24123_readreg(state, 0x14);
855 if (state->config->dont_use_pll) {
857 if (fe->ops.tuner_ops.get_status)
858 fe->ops.tuner_ops.get_status(fe, &tun_status);
859 if (tun_status & TUNER_STATUS_LOCKED)
860 *status |= FE_HAS_SIGNAL;
862 int lock = cx24123_readreg(state, 0x20);
864 *status |= FE_HAS_SIGNAL;
868 *status |= FE_HAS_CARRIER; /* Phase locked */
870 *status |= FE_HAS_VITERBI;
872 /* Reed-Solomon Status */
874 *status |= FE_HAS_SYNC;
876 *status |= FE_HAS_LOCK; /*Full Sync */
882 * Configured to return the measurement of errors in blocks,
883 * because no UCBLOCKS value is available, so this value doubles up
884 * to satisfy both measurements.
886 static int cx24123_read_ber(struct dvb_frontend *fe, u32 *ber)
888 struct cx24123_state *state = fe->demodulator_priv;
890 /* The true bit error rate is this value divided by
891 the window size (set as 256 * 255) */
892 *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
893 (cx24123_readreg(state, 0x1d) << 8 |
894 cx24123_readreg(state, 0x1e));
896 dprintk("BER = %d\n", *ber);
901 static int cx24123_read_signal_strength(struct dvb_frontend *fe,
902 u16 *signal_strength)
904 struct cx24123_state *state = fe->demodulator_priv;
906 /* larger = better */
907 *signal_strength = cx24123_readreg(state, 0x3b) << 8;
909 dprintk("Signal strength = %d\n", *signal_strength);
914 static int cx24123_read_snr(struct dvb_frontend *fe, u16 *snr)
916 struct cx24123_state *state = fe->demodulator_priv;
918 /* Inverted raw Es/N0 count, totally bogus but better than the
920 *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) |
921 (u16)cx24123_readreg(state, 0x19));
923 dprintk("read S/N index = %d\n", *snr);
928 static int cx24123_set_frontend(struct dvb_frontend *fe,
929 struct dvb_frontend_parameters *p)
931 struct cx24123_state *state = fe->demodulator_priv;
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);
945 if (!state->config->dont_use_pll)
946 cx24123_pll_tune(fe, p);
947 else if (fe->ops.tuner_ops.set_params)
948 fe->ops.tuner_ops.set_params(fe, p);
950 err("it seems I don't have a tuner...");
952 /* Enable automatic aquisition and reset cycle */
953 cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07));
954 cx24123_writereg(state, 0x00, 0x10);
955 cx24123_writereg(state, 0x00, 0);
957 if (state->config->agc_callback)
958 state->config->agc_callback(fe);
963 static int cx24123_get_frontend(struct dvb_frontend *fe,
964 struct dvb_frontend_parameters *p)
966 struct cx24123_state *state = fe->demodulator_priv;
970 if (cx24123_get_inversion(state, &p->inversion) != 0) {
971 err("%s: Failed to get inversion status\n", __func__);
974 if (cx24123_get_fec(state, &p->u.qpsk.fec_inner) != 0) {
975 err("%s: Failed to get fec status\n", __func__);
978 p->frequency = state->currentfreq;
979 p->u.qpsk.symbol_rate = state->currentsymbolrate;
984 static int cx24123_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
986 struct cx24123_state *state = fe->demodulator_priv;
989 /* wait for diseqc queue ready */
990 cx24123_wait_for_diseqc(state);
992 val = cx24123_readreg(state, 0x29) & ~0x40;
996 dprintk("setting tone on\n");
997 return cx24123_writereg(state, 0x29, val | 0x10);
999 dprintk("setting tone off\n");
1000 return cx24123_writereg(state, 0x29, val & 0xef);
1002 err("CASE reached default with tone=%d\n", tone);
1009 static int cx24123_tune(struct dvb_frontend *fe,
1010 struct dvb_frontend_parameters *params,
1011 unsigned int mode_flags,
1012 unsigned int *delay,
1013 fe_status_t *status)
1018 retval = cx24123_set_frontend(fe, params);
1020 if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
1021 cx24123_read_status(fe, status);
1027 static int cx24123_get_algo(struct dvb_frontend *fe)
1029 return 1; /* FE_ALGO_HW */
1032 static void cx24123_release(struct dvb_frontend *fe)
1034 struct cx24123_state *state = fe->demodulator_priv;
1036 i2c_del_adapter(&state->tuner_i2c_adapter);
1040 static int cx24123_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap,
1041 struct i2c_msg msg[], int num)
1043 struct cx24123_state *state = i2c_get_adapdata(i2c_adap);
1044 /* this repeater closes after the first stop */
1045 cx24123_repeater_mode(state, 1, 1);
1046 return i2c_transfer(state->i2c, msg, num);
1049 static u32 cx24123_tuner_i2c_func(struct i2c_adapter *adapter)
1051 return I2C_FUNC_I2C;
1054 static struct i2c_algorithm cx24123_tuner_i2c_algo = {
1055 .master_xfer = cx24123_tuner_i2c_tuner_xfer,
1056 .functionality = cx24123_tuner_i2c_func,
1059 struct i2c_adapter *
1060 cx24123_get_tuner_i2c_adapter(struct dvb_frontend *fe)
1062 struct cx24123_state *state = fe->demodulator_priv;
1063 return &state->tuner_i2c_adapter;
1065 EXPORT_SYMBOL(cx24123_get_tuner_i2c_adapter);
1067 static struct dvb_frontend_ops cx24123_ops;
1069 struct dvb_frontend *cx24123_attach(const struct cx24123_config *config,
1070 struct i2c_adapter *i2c)
1072 struct cx24123_state *state =
1073 kzalloc(sizeof(struct cx24123_state), GFP_KERNEL);
1076 /* allocate memory for the internal state */
1077 if (state == NULL) {
1078 err("Unable to kmalloc\n");
1082 /* setup the state */
1083 state->config = config;
1086 /* check if the demod is there */
1087 state->demod_rev = cx24123_readreg(state, 0x00);
1088 switch (state->demod_rev) {
1090 info("detected CX24123C\n");
1093 info("detected CX24123\n");
1096 err("wrong demod revision: %x\n", state->demod_rev);
1100 /* create dvb_frontend */
1101 memcpy(&state->frontend.ops, &cx24123_ops,
1102 sizeof(struct dvb_frontend_ops));
1103 state->frontend.demodulator_priv = state;
1105 /* create tuner i2c adapter */
1106 if (config->dont_use_pll)
1107 cx24123_repeater_mode(state, 1, 0);
1109 strlcpy(state->tuner_i2c_adapter.name, "CX24123 tuner I2C bus",
1110 sizeof(state->tuner_i2c_adapter.name));
1111 state->tuner_i2c_adapter.class = I2C_CLASS_TV_DIGITAL,
1112 state->tuner_i2c_adapter.algo = &cx24123_tuner_i2c_algo;
1113 state->tuner_i2c_adapter.algo_data = NULL;
1114 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
1115 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
1116 err("tuner i2c bus could not be initialized\n");
1120 return &state->frontend;
1127 EXPORT_SYMBOL(cx24123_attach);
1129 static struct dvb_frontend_ops cx24123_ops = {
1132 .name = "Conexant CX24123/CX24109",
1134 .frequency_min = 950000,
1135 .frequency_max = 2150000,
1136 .frequency_stepsize = 1011, /* kHz for QPSK frontends */
1137 .frequency_tolerance = 5000,
1138 .symbol_rate_min = 1000000,
1139 .symbol_rate_max = 45000000,
1140 .caps = FE_CAN_INVERSION_AUTO |
1141 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1142 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1143 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1144 FE_CAN_QPSK | FE_CAN_RECOVER
1147 .release = cx24123_release,
1149 .init = cx24123_initfe,
1150 .set_frontend = cx24123_set_frontend,
1151 .get_frontend = cx24123_get_frontend,
1152 .read_status = cx24123_read_status,
1153 .read_ber = cx24123_read_ber,
1154 .read_signal_strength = cx24123_read_signal_strength,
1155 .read_snr = cx24123_read_snr,
1156 .diseqc_send_master_cmd = cx24123_send_diseqc_msg,
1157 .diseqc_send_burst = cx24123_diseqc_send_burst,
1158 .set_tone = cx24123_set_tone,
1159 .set_voltage = cx24123_set_voltage,
1160 .tune = cx24123_tune,
1161 .get_frontend_algo = cx24123_get_algo,
1164 MODULE_DESCRIPTION("DVB Frontend module for Conexant " \
1165 "CX24123/CX24109/CX24113 hardware");
1166 MODULE_AUTHOR("Steven Toth");
1167 MODULE_LICENSE("GPL");