1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver
5 * Copyright (C) 2005 Steven Toth <stoth@linuxtv.org>
7 * Support for KWorld DVB-S 100 by Vadim Catana <skystar@moldova.cc>
9 * Support for CX24123/CX24113-NIM by Patrick Boettcher <pb@linuxtv.org>
12 #include <linux/slab.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <asm/div64.h>
18 #include <media/dvb_frontend.h>
23 static int force_band;
24 module_param(force_band, int, 0644);
25 MODULE_PARM_DESC(force_band, "Force a specific band select "\
26 "(1-9, default:off).");
29 module_param(debug, int, 0644);
30 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
32 #define info(args...) do { printk(KERN_INFO "CX24123: " args); } while (0)
33 #define err(args...) do { printk(KERN_ERR "CX24123: " args); } while (0)
35 #define dprintk(args...) \
38 printk(KERN_DEBUG "CX24123: %s: ", __func__); \
43 struct cx24123_state {
44 struct i2c_adapter *i2c;
45 const struct cx24123_config *config;
47 struct dvb_frontend frontend;
49 /* Some PLL specifics for tuning */
56 struct i2c_adapter tuner_i2c_adapter;
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 */
66 static struct cx24123_AGC_val {
72 } cx24123_AGC_vals[] =
75 .symbolrate_low = 1000000,
76 .symbolrate_high = 4999999,
77 /* the specs recommend other values for VGA offsets,
78 but tests show they are wrong */
79 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
80 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07,
81 .FILTune = 0x27f /* 0.41 V */
84 .symbolrate_low = 5000000,
85 .symbolrate_high = 14999999,
86 .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
87 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f,
88 .FILTune = 0x317 /* 0.90 V */
91 .symbolrate_low = 15000000,
92 .symbolrate_high = 45000000,
93 .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180,
94 .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f,
95 .FILTune = 0x145 /* 2.70 V */
100 * Various tuner defaults need to be established for a given frequency kHz.
101 * fixme: The bounds on the bands do not match the doc in real life.
102 * fixme: Some of them have been moved, other might need adjustment.
104 static struct cx24123_bandselect_val {
109 } cx24123_bandselect_vals[] =
114 .freq_high = 1074999,
116 .progdata = (0 << 19) | (0 << 9) | 0x40,
122 .freq_high = 1177999,
124 .progdata = (0 << 19) | (0 << 9) | 0x80,
130 .freq_high = 1295999,
132 .progdata = (0 << 19) | (1 << 9) | 0x01,
138 .freq_high = 1431999,
140 .progdata = (0 << 19) | (1 << 9) | 0x02,
146 .freq_high = 1575999,
148 .progdata = (0 << 19) | (1 << 9) | 0x04,
154 .freq_high = 1717999,
156 .progdata = (0 << 19) | (1 << 9) | 0x08,
162 .freq_high = 1855999,
164 .progdata = (0 << 19) | (1 << 9) | 0x10,
170 .freq_high = 2035999,
172 .progdata = (0 << 19) | (1 << 9) | 0x20,
178 .freq_high = 2150000,
180 .progdata = (0 << 19) | (1 << 9) | 0x40,
187 } cx24123_regdata[] =
189 {0x00, 0x03}, /* Reset system */
190 {0x00, 0x00}, /* Clear reset */
191 {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */
192 {0x04, 0x10}, /* MPEG */
193 {0x05, 0x04}, /* MPEG */
194 {0x06, 0x31}, /* MPEG (default) */
195 {0x0b, 0x00}, /* Freq search start point (default) */
196 {0x0c, 0x00}, /* Demodulator sample gain (default) */
197 {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */
198 {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
199 {0x0f, 0xfe}, /* FEC search mask (all supported codes) */
200 {0x10, 0x01}, /* Default search inversion, no repeat (default) */
201 {0x16, 0x00}, /* Enable reading of frequency */
202 {0x17, 0x01}, /* Enable EsNO Ready Counter */
203 {0x1c, 0x80}, /* Enable error counter */
204 {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */
205 {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */
206 {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */
207 {0x29, 0x00}, /* DiSEqC LNB_DC off */
208 {0x2a, 0xb0}, /* DiSEqC Parameters (default) */
209 {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */
210 {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */
216 {0x32, 0x8c}, /* DiSEqC Parameters (default) */
217 {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */
219 {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */
220 {0x36, 0x02}, /* DiSEqC Parameters (default) */
221 {0x37, 0x3a}, /* DiSEqC Parameters (default) */
222 {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */
223 {0x44, 0x00}, /* Constellation (default) */
224 {0x45, 0x00}, /* Symbol count (default) */
225 {0x46, 0x0d}, /* Symbol rate estimator on (default) */
226 {0x56, 0xc1}, /* Error Counter = Viterbi BER */
227 {0x57, 0xff}, /* Error Counter Window (default) */
228 {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */
229 {0x67, 0x83}, /* Non-DCII symbol clock */
232 static int cx24123_i2c_writereg(struct cx24123_state *state,
233 u8 i2c_addr, int reg, int data)
235 u8 buf[] = { reg, data };
236 struct i2c_msg msg = {
237 .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
241 /* printk(KERN_DEBUG "wr(%02x): %02x %02x\n", i2c_addr, reg, data); */
243 err = i2c_transfer(state->i2c, &msg, 1);
245 printk("%s: writereg error(err == %i, reg == 0x%02x, data == 0x%02x)\n",
246 __func__, err, reg, data);
253 static int cx24123_i2c_readreg(struct cx24123_state *state, u8 i2c_addr, u8 reg)
257 struct i2c_msg msg[] = {
258 { .addr = i2c_addr, .flags = 0, .buf = ®, .len = 1 },
259 { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &b, .len = 1 }
262 ret = i2c_transfer(state->i2c, msg, 2);
265 err("%s: reg=0x%x (error=%d)\n", __func__, reg, ret);
269 /* printk(KERN_DEBUG "rd(%02x): %02x %02x\n", i2c_addr, reg, b); */
274 #define cx24123_readreg(state, reg) \
275 cx24123_i2c_readreg(state, state->config->demod_address, reg)
276 #define cx24123_writereg(state, reg, val) \
277 cx24123_i2c_writereg(state, state->config->demod_address, reg, val)
279 static int cx24123_set_inversion(struct cx24123_state *state,
280 enum fe_spectral_inversion inversion)
282 u8 nom_reg = cx24123_readreg(state, 0x0e);
283 u8 auto_reg = cx24123_readreg(state, 0x10);
287 dprintk("inversion off\n");
288 cx24123_writereg(state, 0x0e, nom_reg & ~0x80);
289 cx24123_writereg(state, 0x10, auto_reg | 0x80);
292 dprintk("inversion on\n");
293 cx24123_writereg(state, 0x0e, nom_reg | 0x80);
294 cx24123_writereg(state, 0x10, auto_reg | 0x80);
297 dprintk("inversion auto\n");
298 cx24123_writereg(state, 0x10, auto_reg & ~0x80);
307 static int cx24123_get_inversion(struct cx24123_state *state,
308 enum fe_spectral_inversion *inversion)
312 val = cx24123_readreg(state, 0x1b) >> 7;
315 dprintk("read inversion off\n");
316 *inversion = INVERSION_OFF;
318 dprintk("read inversion on\n");
319 *inversion = INVERSION_ON;
325 static int cx24123_set_fec(struct cx24123_state *state, enum fe_code_rate fec)
327 u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07;
329 if (((int)fec < FEC_NONE) || (fec > FEC_AUTO))
332 /* Set the soft decision threshold */
334 cx24123_writereg(state, 0x43,
335 cx24123_readreg(state, 0x43) | 0x01);
337 cx24123_writereg(state, 0x43,
338 cx24123_readreg(state, 0x43) & ~0x01);
342 dprintk("set FEC to 1/2\n");
343 cx24123_writereg(state, 0x0e, nom_reg | 0x01);
344 cx24123_writereg(state, 0x0f, 0x02);
347 dprintk("set FEC to 2/3\n");
348 cx24123_writereg(state, 0x0e, nom_reg | 0x02);
349 cx24123_writereg(state, 0x0f, 0x04);
352 dprintk("set FEC to 3/4\n");
353 cx24123_writereg(state, 0x0e, nom_reg | 0x03);
354 cx24123_writereg(state, 0x0f, 0x08);
357 dprintk("set FEC to 4/5\n");
358 cx24123_writereg(state, 0x0e, nom_reg | 0x04);
359 cx24123_writereg(state, 0x0f, 0x10);
362 dprintk("set FEC to 5/6\n");
363 cx24123_writereg(state, 0x0e, nom_reg | 0x05);
364 cx24123_writereg(state, 0x0f, 0x20);
367 dprintk("set FEC to 6/7\n");
368 cx24123_writereg(state, 0x0e, nom_reg | 0x06);
369 cx24123_writereg(state, 0x0f, 0x40);
372 dprintk("set FEC to 7/8\n");
373 cx24123_writereg(state, 0x0e, nom_reg | 0x07);
374 cx24123_writereg(state, 0x0f, 0x80);
377 dprintk("set FEC to auto\n");
378 cx24123_writereg(state, 0x0f, 0xfe);
387 static int cx24123_get_fec(struct cx24123_state *state, enum fe_code_rate *fec)
391 ret = cx24123_readreg(state, 0x1b);
419 /* this can happen when there's no lock */
426 /* Approximation of closest integer of log2(a/b). It actually gives the
427 lowest integer i such that 2^i >= round(a/b) */
428 static u32 cx24123_int_log2(u32 a, u32 b)
430 u32 exp, nearest = 0;
434 if (div < (1UL << 31)) {
435 for (exp = 1; div > exp; nearest++)
441 static int cx24123_set_symbolrate(struct cx24123_state *state, u32 srate)
444 u32 sample_rate, ratio, sample_gain;
447 /* check if symbol rate is within limits */
448 if ((srate > state->frontend.ops.info.symbol_rate_max) ||
449 (srate < state->frontend.ops.info.symbol_rate_min))
452 /* choose the sampling rate high enough for the required operation,
453 while optimizing the power consumed by the demodulator */
454 if (srate < (XTAL*2)/2)
456 else if (srate < (XTAL*3)/2)
458 else if (srate < (XTAL*4)/2)
460 else if (srate < (XTAL*5)/2)
462 else if (srate < (XTAL*6)/2)
464 else if (srate < (XTAL*7)/2)
466 else if (srate < (XTAL*8)/2)
472 sample_rate = pll_mult * XTAL;
474 /* SYSSymbolRate[21:0] = (srate << 23) / sample_rate */
476 tmp = ((u64)srate) << 23;
477 do_div(tmp, sample_rate);
480 cx24123_writereg(state, 0x01, pll_mult * 6);
482 cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f);
483 cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff);
484 cx24123_writereg(state, 0x0a, ratio & 0xff);
486 /* also set the demodulator sample gain */
487 sample_gain = cx24123_int_log2(sample_rate, srate);
488 tmp = cx24123_readreg(state, 0x0c) & ~0xe0;
489 cx24123_writereg(state, 0x0c, tmp | sample_gain << 5);
491 dprintk("srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n",
492 srate, ratio, sample_rate, sample_gain);
498 * Based on the required frequency and symbolrate, the tuner AGC has
499 * to be configured and the correct band selected.
500 * Calculate those values.
502 static int cx24123_pll_calculate(struct dvb_frontend *fe)
504 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
505 struct cx24123_state *state = fe->demodulator_priv;
506 u32 ndiv = 0, adiv = 0, vco_div = 0;
510 int num_bands = ARRAY_SIZE(cx24123_bandselect_vals);
511 struct cx24123_bandselect_val *bsv = NULL;
512 struct cx24123_AGC_val *agcv = NULL;
514 /* Defaults for low freq, low rate */
515 state->VCAarg = cx24123_AGC_vals[0].VCAprogdata;
516 state->VGAarg = cx24123_AGC_vals[0].VGAprogdata;
517 state->bandselectarg = cx24123_bandselect_vals[0].progdata;
518 vco_div = cx24123_bandselect_vals[0].VCOdivider;
520 /* For the given symbol rate, determine the VCA, VGA and
521 * FILTUNE programming bits */
522 for (i = 0; i < ARRAY_SIZE(cx24123_AGC_vals); i++) {
523 agcv = &cx24123_AGC_vals[i];
524 if ((agcv->symbolrate_low <= p->symbol_rate) &&
525 (agcv->symbolrate_high >= p->symbol_rate)) {
526 state->VCAarg = agcv->VCAprogdata;
527 state->VGAarg = agcv->VGAprogdata;
528 state->FILTune = agcv->FILTune;
532 /* determine the band to use */
533 if (force_band < 1 || force_band > num_bands) {
534 for (i = 0; i < num_bands; i++) {
535 bsv = &cx24123_bandselect_vals[i];
536 if ((bsv->freq_low <= p->frequency) &&
537 (bsv->freq_high >= p->frequency))
541 band = force_band - 1;
543 state->bandselectarg = cx24123_bandselect_vals[band].progdata;
544 vco_div = cx24123_bandselect_vals[band].VCOdivider;
546 /* determine the charge pump current */
547 if (p->frequency < (cx24123_bandselect_vals[band].freq_low +
548 cx24123_bandselect_vals[band].freq_high) / 2)
553 /* Determine the N/A dividers for the requested lband freq (in kHz). */
554 /* Note: the reference divider R=10, frequency is in KHz,
556 ndiv = (((p->frequency * vco_div * 10) /
557 (2 * XTAL / 1000)) / 32) & 0x1ff;
558 adiv = (((p->frequency * vco_div * 10) /
559 (2 * XTAL / 1000)) % 32) & 0x1f;
561 if (adiv == 0 && ndiv > 0)
564 /* control bits 11, refdiv 11, charge pump polarity 1,
565 * charge pump current, ndiv, adiv */
566 state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) |
567 (pump << 14) | (ndiv << 5) | adiv;
573 * Tuner data is 21 bits long, must be left-aligned in data.
574 * Tuner cx24109 is written through a dedicated 3wire interface
577 static int cx24123_pll_writereg(struct dvb_frontend *fe, u32 data)
579 struct cx24123_state *state = fe->demodulator_priv;
580 unsigned long timeout;
582 dprintk("pll writereg called, data=0x%08x\n", data);
584 /* align the 21 bytes into to bit23 boundary */
587 /* Reset the demod pll word length to 0x15 bits */
588 cx24123_writereg(state, 0x21, 0x15);
590 /* write the msb 8 bits, wait for the send to be completed */
591 timeout = jiffies + msecs_to_jiffies(40);
592 cx24123_writereg(state, 0x22, (data >> 16) & 0xff);
593 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
594 if (time_after(jiffies, timeout)) {
595 err("%s: demodulator is not responding, "\
596 "possibly hung, aborting.\n", __func__);
602 /* send another 8 bytes, wait for the send to be completed */
603 timeout = jiffies + msecs_to_jiffies(40);
604 cx24123_writereg(state, 0x22, (data >> 8) & 0xff);
605 while ((cx24123_readreg(state, 0x20) & 0x40) == 0) {
606 if (time_after(jiffies, timeout)) {
607 err("%s: demodulator is not responding, "\
608 "possibly hung, aborting.\n", __func__);
614 /* send the lower 5 bits of this byte, padded with 3 LBB,
615 * wait for the send to be completed */
616 timeout = jiffies + msecs_to_jiffies(40);
617 cx24123_writereg(state, 0x22, (data) & 0xff);
618 while ((cx24123_readreg(state, 0x20) & 0x80)) {
619 if (time_after(jiffies, timeout)) {
620 err("%s: demodulator is not responding," \
621 "possibly hung, aborting.\n", __func__);
627 /* Trigger the demod to configure the tuner */
628 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) | 2);
629 cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) & 0xfd);
634 static int cx24123_pll_tune(struct dvb_frontend *fe)
636 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
637 struct cx24123_state *state = fe->demodulator_priv;
640 dprintk("frequency=%i\n", p->frequency);
642 if (cx24123_pll_calculate(fe) != 0) {
643 err("%s: cx24123_pll_calculate failed\n", __func__);
647 /* Write the new VCO/VGA */
648 cx24123_pll_writereg(fe, state->VCAarg);
649 cx24123_pll_writereg(fe, state->VGAarg);
651 /* Write the new bandselect and pll args */
652 cx24123_pll_writereg(fe, state->bandselectarg);
653 cx24123_pll_writereg(fe, state->pllarg);
655 /* set the FILTUNE voltage */
656 val = cx24123_readreg(state, 0x28) & ~0x3;
657 cx24123_writereg(state, 0x27, state->FILTune >> 2);
658 cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3));
660 dprintk("pll tune VCA=%d, band=%d, pll=%d\n", state->VCAarg,
661 state->bandselectarg, state->pllarg);
669 * [7:7] = BTI enabled
670 * [6:6] = I2C repeater enabled
671 * [5:5] = I2C repeater start
675 /* mode == 1 -> i2c-repeater, 0 -> bti */
676 static int cx24123_repeater_mode(struct cx24123_state *state, u8 mode, u8 start)
678 u8 r = cx24123_readreg(state, 0x23) & 0x1e;
680 r |= (1 << 6) | (start << 5);
682 r |= (1 << 7) | (start);
683 return cx24123_writereg(state, 0x23, r);
686 static int cx24123_initfe(struct dvb_frontend *fe)
688 struct cx24123_state *state = fe->demodulator_priv;
691 dprintk("init frontend\n");
693 /* Configure the demod to a good set of defaults */
694 for (i = 0; i < ARRAY_SIZE(cx24123_regdata); i++)
695 cx24123_writereg(state, cx24123_regdata[i].reg,
696 cx24123_regdata[i].data);
698 /* Set the LNB polarity */
699 if (state->config->lnb_polarity)
700 cx24123_writereg(state, 0x32,
701 cx24123_readreg(state, 0x32) | 0x02);
703 if (state->config->dont_use_pll)
704 cx24123_repeater_mode(state, 1, 0);
709 static int cx24123_set_voltage(struct dvb_frontend *fe,
710 enum fe_sec_voltage voltage)
712 struct cx24123_state *state = fe->demodulator_priv;
715 val = cx24123_readreg(state, 0x29) & ~0x40;
719 dprintk("setting voltage 13V\n");
720 return cx24123_writereg(state, 0x29, val & 0x7f);
722 dprintk("setting voltage 18V\n");
723 return cx24123_writereg(state, 0x29, val | 0x80);
724 case SEC_VOLTAGE_OFF:
725 /* already handled in cx88-dvb */
734 /* wait for diseqc queue to become ready (or timeout) */
735 static void cx24123_wait_for_diseqc(struct cx24123_state *state)
737 unsigned long timeout = jiffies + msecs_to_jiffies(200);
738 while (!(cx24123_readreg(state, 0x29) & 0x40)) {
739 if (time_after(jiffies, timeout)) {
740 err("%s: diseqc queue not ready, " \
741 "command may be lost.\n", __func__);
748 static int cx24123_send_diseqc_msg(struct dvb_frontend *fe,
749 struct dvb_diseqc_master_cmd *cmd)
751 struct cx24123_state *state = fe->demodulator_priv;
756 /* stop continuous tone if enabled */
757 tone = cx24123_readreg(state, 0x29);
759 cx24123_writereg(state, 0x29, tone & ~0x50);
761 /* wait for diseqc queue ready */
762 cx24123_wait_for_diseqc(state);
764 /* select tone mode */
765 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
767 for (i = 0; i < cmd->msg_len; i++)
768 cx24123_writereg(state, 0x2C + i, cmd->msg[i]);
770 val = cx24123_readreg(state, 0x29);
771 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) |
772 ((cmd->msg_len-3) & 3));
774 /* wait for diseqc message to finish sending */
775 cx24123_wait_for_diseqc(state);
777 /* restart continuous tone if enabled */
779 cx24123_writereg(state, 0x29, tone & ~0x40);
784 static int cx24123_diseqc_send_burst(struct dvb_frontend *fe,
785 enum fe_sec_mini_cmd burst)
787 struct cx24123_state *state = fe->demodulator_priv;
792 /* stop continuous tone if enabled */
793 tone = cx24123_readreg(state, 0x29);
795 cx24123_writereg(state, 0x29, tone & ~0x50);
797 /* wait for diseqc queue ready */
798 cx24123_wait_for_diseqc(state);
800 /* select tone mode */
801 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) | 0x4);
803 val = cx24123_readreg(state, 0x29);
804 if (burst == SEC_MINI_A)
805 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00));
806 else if (burst == SEC_MINI_B)
807 cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08));
811 cx24123_wait_for_diseqc(state);
812 cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb);
814 /* restart continuous tone if enabled */
816 cx24123_writereg(state, 0x29, tone & ~0x40);
821 static int cx24123_read_status(struct dvb_frontend *fe, enum fe_status *status)
823 struct cx24123_state *state = fe->demodulator_priv;
824 int sync = cx24123_readreg(state, 0x14);
827 if (state->config->dont_use_pll) {
829 if (fe->ops.tuner_ops.get_status)
830 fe->ops.tuner_ops.get_status(fe, &tun_status);
831 if (tun_status & TUNER_STATUS_LOCKED)
832 *status |= FE_HAS_SIGNAL;
834 int lock = cx24123_readreg(state, 0x20);
836 *status |= FE_HAS_SIGNAL;
840 *status |= FE_HAS_CARRIER; /* Phase locked */
842 *status |= FE_HAS_VITERBI;
844 /* Reed-Solomon Status */
846 *status |= FE_HAS_SYNC;
848 *status |= FE_HAS_LOCK; /*Full Sync */
854 * Configured to return the measurement of errors in blocks,
855 * because no UCBLOCKS value is available, so this value doubles up
856 * to satisfy both measurements.
858 static int cx24123_read_ber(struct dvb_frontend *fe, u32 *ber)
860 struct cx24123_state *state = fe->demodulator_priv;
862 /* The true bit error rate is this value divided by
863 the window size (set as 256 * 255) */
864 *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
865 (cx24123_readreg(state, 0x1d) << 8 |
866 cx24123_readreg(state, 0x1e));
868 dprintk("BER = %d\n", *ber);
873 static int cx24123_read_signal_strength(struct dvb_frontend *fe,
874 u16 *signal_strength)
876 struct cx24123_state *state = fe->demodulator_priv;
878 /* larger = better */
879 *signal_strength = cx24123_readreg(state, 0x3b) << 8;
881 dprintk("Signal strength = %d\n", *signal_strength);
886 static int cx24123_read_snr(struct dvb_frontend *fe, u16 *snr)
888 struct cx24123_state *state = fe->demodulator_priv;
890 /* Inverted raw Es/N0 count, totally bogus but better than the
892 *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) |
893 (u16)cx24123_readreg(state, 0x19));
895 dprintk("read S/N index = %d\n", *snr);
900 static int cx24123_set_frontend(struct dvb_frontend *fe)
902 struct cx24123_state *state = fe->demodulator_priv;
903 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
907 if (state->config->set_ts_params)
908 state->config->set_ts_params(fe, 0);
910 state->currentfreq = p->frequency;
911 state->currentsymbolrate = p->symbol_rate;
913 cx24123_set_inversion(state, p->inversion);
914 cx24123_set_fec(state, p->fec_inner);
915 cx24123_set_symbolrate(state, p->symbol_rate);
917 if (!state->config->dont_use_pll)
918 cx24123_pll_tune(fe);
919 else if (fe->ops.tuner_ops.set_params)
920 fe->ops.tuner_ops.set_params(fe);
922 err("it seems I don't have a tuner...");
924 /* Enable automatic acquisition and reset cycle */
925 cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07));
926 cx24123_writereg(state, 0x00, 0x10);
927 cx24123_writereg(state, 0x00, 0);
929 if (state->config->agc_callback)
930 state->config->agc_callback(fe);
935 static int cx24123_get_frontend(struct dvb_frontend *fe,
936 struct dtv_frontend_properties *p)
938 struct cx24123_state *state = fe->demodulator_priv;
942 if (cx24123_get_inversion(state, &p->inversion) != 0) {
943 err("%s: Failed to get inversion status\n", __func__);
946 if (cx24123_get_fec(state, &p->fec_inner) != 0) {
947 err("%s: Failed to get fec status\n", __func__);
950 p->frequency = state->currentfreq;
951 p->symbol_rate = state->currentsymbolrate;
956 static int cx24123_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
958 struct cx24123_state *state = fe->demodulator_priv;
961 /* wait for diseqc queue ready */
962 cx24123_wait_for_diseqc(state);
964 val = cx24123_readreg(state, 0x29) & ~0x40;
968 dprintk("setting tone on\n");
969 return cx24123_writereg(state, 0x29, val | 0x10);
971 dprintk("setting tone off\n");
972 return cx24123_writereg(state, 0x29, val & 0xef);
974 err("CASE reached default with tone=%d\n", tone);
981 static int cx24123_tune(struct dvb_frontend *fe,
983 unsigned int mode_flags,
985 enum fe_status *status)
990 retval = cx24123_set_frontend(fe);
992 if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
993 cx24123_read_status(fe, status);
999 static enum dvbfe_algo cx24123_get_algo(struct dvb_frontend *fe)
1001 return DVBFE_ALGO_HW;
1004 static void cx24123_release(struct dvb_frontend *fe)
1006 struct cx24123_state *state = fe->demodulator_priv;
1008 i2c_del_adapter(&state->tuner_i2c_adapter);
1012 static int cx24123_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap,
1013 struct i2c_msg msg[], int num)
1015 struct cx24123_state *state = i2c_get_adapdata(i2c_adap);
1016 /* this repeater closes after the first stop */
1017 cx24123_repeater_mode(state, 1, 1);
1018 return i2c_transfer(state->i2c, msg, num);
1021 static u32 cx24123_tuner_i2c_func(struct i2c_adapter *adapter)
1023 return I2C_FUNC_I2C;
1026 static const struct i2c_algorithm cx24123_tuner_i2c_algo = {
1027 .master_xfer = cx24123_tuner_i2c_tuner_xfer,
1028 .functionality = cx24123_tuner_i2c_func,
1031 struct i2c_adapter *
1032 cx24123_get_tuner_i2c_adapter(struct dvb_frontend *fe)
1034 struct cx24123_state *state = fe->demodulator_priv;
1035 return &state->tuner_i2c_adapter;
1037 EXPORT_SYMBOL(cx24123_get_tuner_i2c_adapter);
1039 static const struct dvb_frontend_ops cx24123_ops;
1041 struct dvb_frontend *cx24123_attach(const struct cx24123_config *config,
1042 struct i2c_adapter *i2c)
1044 /* allocate memory for the internal state */
1045 struct cx24123_state *state =
1046 kzalloc(sizeof(struct cx24123_state), GFP_KERNEL);
1049 if (state == NULL) {
1050 err("Unable to kzalloc\n");
1054 /* setup the state */
1055 state->config = config;
1058 /* check if the demod is there */
1059 state->demod_rev = cx24123_readreg(state, 0x00);
1060 switch (state->demod_rev) {
1062 info("detected CX24123C\n");
1065 info("detected CX24123\n");
1068 err("wrong demod revision: %x\n", state->demod_rev);
1072 /* create dvb_frontend */
1073 memcpy(&state->frontend.ops, &cx24123_ops,
1074 sizeof(struct dvb_frontend_ops));
1075 state->frontend.demodulator_priv = state;
1077 /* create tuner i2c adapter */
1078 if (config->dont_use_pll)
1079 cx24123_repeater_mode(state, 1, 0);
1081 strscpy(state->tuner_i2c_adapter.name, "CX24123 tuner I2C bus",
1082 sizeof(state->tuner_i2c_adapter.name));
1083 state->tuner_i2c_adapter.algo = &cx24123_tuner_i2c_algo;
1084 state->tuner_i2c_adapter.algo_data = NULL;
1085 state->tuner_i2c_adapter.dev.parent = i2c->dev.parent;
1086 i2c_set_adapdata(&state->tuner_i2c_adapter, state);
1087 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) {
1088 err("tuner i2c bus could not be initialized\n");
1092 return &state->frontend;
1099 EXPORT_SYMBOL_GPL(cx24123_attach);
1101 static const struct dvb_frontend_ops cx24123_ops = {
1102 .delsys = { SYS_DVBS },
1104 .name = "Conexant CX24123/CX24109",
1105 .frequency_min_hz = 950 * MHz,
1106 .frequency_max_hz = 2150 * MHz,
1107 .frequency_stepsize_hz = 1011 * kHz,
1108 .frequency_tolerance_hz = 5 * MHz,
1109 .symbol_rate_min = 1000000,
1110 .symbol_rate_max = 45000000,
1111 .caps = FE_CAN_INVERSION_AUTO |
1112 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1113 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1114 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1115 FE_CAN_QPSK | FE_CAN_RECOVER
1118 .release = cx24123_release,
1120 .init = cx24123_initfe,
1121 .set_frontend = cx24123_set_frontend,
1122 .get_frontend = cx24123_get_frontend,
1123 .read_status = cx24123_read_status,
1124 .read_ber = cx24123_read_ber,
1125 .read_signal_strength = cx24123_read_signal_strength,
1126 .read_snr = cx24123_read_snr,
1127 .diseqc_send_master_cmd = cx24123_send_diseqc_msg,
1128 .diseqc_send_burst = cx24123_diseqc_send_burst,
1129 .set_tone = cx24123_set_tone,
1130 .set_voltage = cx24123_set_voltage,
1131 .tune = cx24123_tune,
1132 .get_frontend_algo = cx24123_get_algo,
1135 MODULE_DESCRIPTION("DVB Frontend module for Conexant " \
1136 "CX24123/CX24109/CX24113 hardware");
1137 MODULE_AUTHOR("Steven Toth");
1138 MODULE_LICENSE("GPL");