/* * Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver * * Copyright (C) 2005 Steven Toth * * Support for KWorld DVB-S 100 by Vadim Catana * * Support for CX24123/CX24113-NIM by Patrick Boettcher * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include "dvb_frontend.h" #include "cx24123.h" #define XTAL 10111000 static int force_band; module_param(force_band, int, 0644); MODULE_PARM_DESC(force_band, "Force a specific band select "\ "(1-9, default:off)."); static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); #define info(args...) do { printk(KERN_INFO "CX24123: " args); } while (0) #define err(args...) do { printk(KERN_ERR "CX24123: " args); } while (0) #define dprintk(args...) \ do { \ if (debug) { \ printk(KERN_DEBUG "CX24123: %s: ", __func__); \ printk(args); \ } \ } while (0) struct cx24123_state { struct i2c_adapter *i2c; const struct cx24123_config *config; struct dvb_frontend frontend; /* Some PLL specifics for tuning */ u32 VCAarg; u32 VGAarg; u32 bandselectarg; u32 pllarg; u32 FILTune; struct i2c_adapter tuner_i2c_adapter; u8 demod_rev; /* The Demod/Tuner can't easily provide these, we cache them */ u32 currentfreq; u32 currentsymbolrate; }; /* Various tuner defaults need to be established for a given symbol rate Sps */ static struct cx24123_AGC_val { u32 symbolrate_low; u32 symbolrate_high; u32 VCAprogdata; u32 VGAprogdata; u32 FILTune; } cx24123_AGC_vals[] = { { .symbolrate_low = 1000000, .symbolrate_high = 4999999, /* the specs recommend other values for VGA offsets, but tests show they are wrong */ .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0, .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07, .FILTune = 0x27f /* 0.41 V */ }, { .symbolrate_low = 5000000, .symbolrate_high = 14999999, .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0, .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f, .FILTune = 0x317 /* 0.90 V */ }, { .symbolrate_low = 15000000, .symbolrate_high = 45000000, .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180, .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f, .FILTune = 0x145 /* 2.70 V */ }, }; /* * Various tuner defaults need to be established for a given frequency kHz. * fixme: The bounds on the bands do not match the doc in real life. * fixme: Some of them have been moved, other might need adjustment. */ static struct cx24123_bandselect_val { u32 freq_low; u32 freq_high; u32 VCOdivider; u32 progdata; } cx24123_bandselect_vals[] = { /* band 1 */ { .freq_low = 950000, .freq_high = 1074999, .VCOdivider = 4, .progdata = (0 << 19) | (0 << 9) | 0x40, }, /* band 2 */ { .freq_low = 1075000, .freq_high = 1177999, .VCOdivider = 4, .progdata = (0 << 19) | (0 << 9) | 0x80, }, /* band 3 */ { .freq_low = 1178000, .freq_high = 1295999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x01, }, /* band 4 */ { .freq_low = 1296000, .freq_high = 1431999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x02, }, /* band 5 */ { .freq_low = 1432000, .freq_high = 1575999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x04, }, /* band 6 */ { .freq_low = 1576000, .freq_high = 1717999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x08, }, /* band 7 */ { .freq_low = 1718000, .freq_high = 1855999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x10, }, /* band 8 */ { .freq_low = 1856000, .freq_high = 2035999, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x20, }, /* band 9 */ { .freq_low = 2036000, .freq_high = 2150000, .VCOdivider = 2, .progdata = (0 << 19) | (1 << 9) | 0x40, }, }; static struct { u8 reg; u8 data; } cx24123_regdata[] = { {0x00, 0x03}, /* Reset system */ {0x00, 0x00}, /* Clear reset */ {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */ {0x04, 0x10}, /* MPEG */ {0x05, 0x04}, /* MPEG */ {0x06, 0x31}, /* MPEG (default) */ {0x0b, 0x00}, /* Freq search start point (default) */ {0x0c, 0x00}, /* Demodulator sample gain (default) */ {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */ {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */ {0x0f, 0xfe}, /* FEC search mask (all supported codes) */ {0x10, 0x01}, /* Default search inversion, no repeat (default) */ {0x16, 0x00}, /* Enable reading of frequency */ {0x17, 0x01}, /* Enable EsNO Ready Counter */ {0x1c, 0x80}, /* Enable error counter */ {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */ {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */ {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */ {0x29, 0x00}, /* DiSEqC LNB_DC off */ {0x2a, 0xb0}, /* DiSEqC Parameters (default) */ {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */ {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */ {0x2d, 0x00}, {0x2e, 0x00}, {0x2f, 0x00}, {0x30, 0x00}, {0x31, 0x00}, {0x32, 0x8c}, /* DiSEqC Parameters (default) */ {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */ {0x34, 0x00}, {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */ {0x36, 0x02}, /* DiSEqC Parameters (default) */ {0x37, 0x3a}, /* DiSEqC Parameters (default) */ {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */ {0x44, 0x00}, /* Constellation (default) */ {0x45, 0x00}, /* Symbol count (default) */ {0x46, 0x0d}, /* Symbol rate estimator on (default) */ {0x56, 0xc1}, /* Error Counter = Viterbi BER */ {0x57, 0xff}, /* Error Counter Window (default) */ {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */ {0x67, 0x83}, /* Non-DCII symbol clock */ }; static int cx24123_i2c_writereg(struct cx24123_state *state, u8 i2c_addr, int reg, int data) { u8 buf[] = { reg, data }; struct i2c_msg msg = { .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2 }; int err; /* printk(KERN_DEBUG "wr(%02x): %02x %02x\n", i2c_addr, reg, data); */ err = i2c_transfer(state->i2c, &msg, 1); if (err != 1) { printk("%s: writereg error(err == %i, reg == 0x%02x," " data == 0x%02x)\n", __func__, err, reg, data); return err; } return 0; } static int cx24123_i2c_readreg(struct cx24123_state *state, u8 i2c_addr, u8 reg) { int ret; u8 b = 0; struct i2c_msg msg[] = { { .addr = i2c_addr, .flags = 0, .buf = ®, .len = 1 }, { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &b, .len = 1 } }; ret = i2c_transfer(state->i2c, msg, 2); if (ret != 2) { err("%s: reg=0x%x (error=%d)\n", __func__, reg, ret); return ret; } /* printk(KERN_DEBUG "rd(%02x): %02x %02x\n", i2c_addr, reg, b); */ return b; } #define cx24123_readreg(state, reg) \ cx24123_i2c_readreg(state, state->config->demod_address, reg) #define cx24123_writereg(state, reg, val) \ cx24123_i2c_writereg(state, state->config->demod_address, reg, val) static int cx24123_set_inversion(struct cx24123_state *state, fe_spectral_inversion_t inversion) { u8 nom_reg = cx24123_readreg(state, 0x0e); u8 auto_reg = cx24123_readreg(state, 0x10); switch (inversion) { case INVERSION_OFF: dprintk("inversion off\n"); cx24123_writereg(state, 0x0e, nom_reg & ~0x80); cx24123_writereg(state, 0x10, auto_reg | 0x80); break; case INVERSION_ON: dprintk("inversion on\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x80); cx24123_writereg(state, 0x10, auto_reg | 0x80); break; case INVERSION_AUTO: dprintk("inversion auto\n"); cx24123_writereg(state, 0x10, auto_reg & ~0x80); break; default: return -EINVAL; } return 0; } static int cx24123_get_inversion(struct cx24123_state *state, fe_spectral_inversion_t *inversion) { u8 val; val = cx24123_readreg(state, 0x1b) >> 7; if (val == 0) { dprintk("read inversion off\n"); *inversion = INVERSION_OFF; } else { dprintk("read inversion on\n"); *inversion = INVERSION_ON; } return 0; } static int cx24123_set_fec(struct cx24123_state *state, fe_code_rate_t fec) { u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07; if (((int)fec < FEC_NONE) || (fec > FEC_AUTO)) fec = FEC_AUTO; /* Set the soft decision threshold */ if (fec == FEC_1_2) cx24123_writereg(state, 0x43, cx24123_readreg(state, 0x43) | 0x01); else cx24123_writereg(state, 0x43, cx24123_readreg(state, 0x43) & ~0x01); switch (fec) { case FEC_1_2: dprintk("set FEC to 1/2\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x01); cx24123_writereg(state, 0x0f, 0x02); break; case FEC_2_3: dprintk("set FEC to 2/3\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x02); cx24123_writereg(state, 0x0f, 0x04); break; case FEC_3_4: dprintk("set FEC to 3/4\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x03); cx24123_writereg(state, 0x0f, 0x08); break; case FEC_4_5: dprintk("set FEC to 4/5\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x04); cx24123_writereg(state, 0x0f, 0x10); break; case FEC_5_6: dprintk("set FEC to 5/6\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x05); cx24123_writereg(state, 0x0f, 0x20); break; case FEC_6_7: dprintk("set FEC to 6/7\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x06); cx24123_writereg(state, 0x0f, 0x40); break; case FEC_7_8: dprintk("set FEC to 7/8\n"); cx24123_writereg(state, 0x0e, nom_reg | 0x07); cx24123_writereg(state, 0x0f, 0x80); break; case FEC_AUTO: dprintk("set FEC to auto\n"); cx24123_writereg(state, 0x0f, 0xfe); break; default: return -EOPNOTSUPP; } return 0; } static int cx24123_get_fec(struct cx24123_state *state, fe_code_rate_t *fec) { int ret; ret = cx24123_readreg(state, 0x1b); if (ret < 0) return ret; ret = ret & 0x07; switch (ret) { case 1: *fec = FEC_1_2; break; case 2: *fec = FEC_2_3; break; case 3: *fec = FEC_3_4; break; case 4: *fec = FEC_4_5; break; case 5: *fec = FEC_5_6; break; case 6: *fec = FEC_6_7; break; case 7: *fec = FEC_7_8; break; default: /* this can happen when there's no lock */ *fec = FEC_NONE; } return 0; } /* Approximation of closest integer of log2(a/b). It actually gives the lowest integer i such that 2^i >= round(a/b) */ static u32 cx24123_int_log2(u32 a, u32 b) { u32 exp, nearest = 0; u32 div = a / b; if (a % b >= b / 2) ++div; if (div < (1 << 31)) { for (exp = 1; div > exp; nearest++) exp += exp; } return nearest; } static int cx24123_set_symbolrate(struct cx24123_state *state, u32 srate) { u64 tmp; u32 sample_rate, ratio, sample_gain; u8 pll_mult; /* check if symbol rate is within limits */ if ((srate > state->frontend.ops.info.symbol_rate_max) || (srate < state->frontend.ops.info.symbol_rate_min)) return -EOPNOTSUPP; /* choose the sampling rate high enough for the required operation, while optimizing the power consumed by the demodulator */ if (srate < (XTAL*2)/2) pll_mult = 2; else if (srate < (XTAL*3)/2) pll_mult = 3; else if (srate < (XTAL*4)/2) pll_mult = 4; else if (srate < (XTAL*5)/2) pll_mult = 5; else if (srate < (XTAL*6)/2) pll_mult = 6; else if (srate < (XTAL*7)/2) pll_mult = 7; else if (srate < (XTAL*8)/2) pll_mult = 8; else pll_mult = 9; sample_rate = pll_mult * XTAL; /* SYSSymbolRate[21:0] = (srate << 23) / sample_rate */ tmp = ((u64)srate) << 23; do_div(tmp, sample_rate); ratio = (u32) tmp; cx24123_writereg(state, 0x01, pll_mult * 6); cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f); cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff); cx24123_writereg(state, 0x0a, ratio & 0xff); /* also set the demodulator sample gain */ sample_gain = cx24123_int_log2(sample_rate, srate); tmp = cx24123_readreg(state, 0x0c) & ~0xe0; cx24123_writereg(state, 0x0c, tmp | sample_gain << 5); dprintk("srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n", srate, ratio, sample_rate, sample_gain); return 0; } /* * Based on the required frequency and symbolrate, the tuner AGC has * to be configured and the correct band selected. * Calculate those values. */ static int cx24123_pll_calculate(struct dvb_frontend *fe) { struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct cx24123_state *state = fe->demodulator_priv; u32 ndiv = 0, adiv = 0, vco_div = 0; int i = 0; int pump = 2; int band = 0; int num_bands = ARRAY_SIZE(cx24123_bandselect_vals); struct cx24123_bandselect_val *bsv = NULL; struct cx24123_AGC_val *agcv = NULL; /* Defaults for low freq, low rate */ state->VCAarg = cx24123_AGC_vals[0].VCAprogdata; state->VGAarg = cx24123_AGC_vals[0].VGAprogdata; state->bandselectarg = cx24123_bandselect_vals[0].progdata; vco_div = cx24123_bandselect_vals[0].VCOdivider; /* For the given symbol rate, determine the VCA, VGA and * FILTUNE programming bits */ for (i = 0; i < ARRAY_SIZE(cx24123_AGC_vals); i++) { agcv = &cx24123_AGC_vals[i]; if ((agcv->symbolrate_low <= p->symbol_rate) && (agcv->symbolrate_high >= p->symbol_rate)) { state->VCAarg = agcv->VCAprogdata; state->VGAarg = agcv->VGAprogdata; state->FILTune = agcv->FILTune; } } /* determine the band to use */ if (force_band < 1 || force_band > num_bands) { for (i = 0; i < num_bands; i++) { bsv = &cx24123_bandselect_vals[i]; if ((bsv->freq_low <= p->frequency) && (bsv->freq_high >= p->frequency)) band = i; } } else band = force_band - 1; state->bandselectarg = cx24123_bandselect_vals[band].progdata; vco_div = cx24123_bandselect_vals[band].VCOdivider; /* determine the charge pump current */ if (p->frequency < (cx24123_bandselect_vals[band].freq_low + cx24123_bandselect_vals[band].freq_high) / 2) pump = 0x01; else pump = 0x02; /* Determine the N/A dividers for the requested lband freq (in kHz). */ /* Note: the reference divider R=10, frequency is in KHz, * XTAL is in Hz */ ndiv = (((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) / 32) & 0x1ff; adiv = (((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) % 32) & 0x1f; if (adiv == 0 && ndiv > 0) ndiv--; /* control bits 11, refdiv 11, charge pump polarity 1, * charge pump current, ndiv, adiv */ state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (pump << 14) | (ndiv << 5) | adiv; return 0; } /* * Tuner data is 21 bits long, must be left-aligned in data. * Tuner cx24109 is written through a dedicated 3wire interface * on the demod chip. */ static int cx24123_pll_writereg(struct dvb_frontend *fe, u32 data) { struct cx24123_state *state = fe->demodulator_priv; unsigned long timeout; dprintk("pll writereg called, data=0x%08x\n", data); /* align the 21 bytes into to bit23 boundary */ data = data << 3; /* Reset the demod pll word length to 0x15 bits */ cx24123_writereg(state, 0x21, 0x15); /* write the msb 8 bits, wait for the send to be completed */ timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data >> 16) & 0xff); while ((cx24123_readreg(state, 0x20) & 0x40) == 0) { if (time_after(jiffies, timeout)) { err("%s: demodulator is not responding, "\ "possibly hung, aborting.\n", __func__); return -EREMOTEIO; } msleep(10); } /* send another 8 bytes, wait for the send to be completed */ timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data >> 8) & 0xff); while ((cx24123_readreg(state, 0x20) & 0x40) == 0) { if (time_after(jiffies, timeout)) { err("%s: demodulator is not responding, "\ "possibly hung, aborting.\n", __func__); return -EREMOTEIO; } msleep(10); } /* send the lower 5 bits of this byte, padded with 3 LBB, * wait for the send to be completed */ timeout = jiffies + msecs_to_jiffies(40); cx24123_writereg(state, 0x22, (data) & 0xff); while ((cx24123_readreg(state, 0x20) & 0x80)) { if (time_after(jiffies, timeout)) { err("%s: demodulator is not responding," \ "possibly hung, aborting.\n", __func__); return -EREMOTEIO; } msleep(10); } /* Trigger the demod to configure the tuner */ cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) | 2); cx24123_writereg(state, 0x20, cx24123_readreg(state, 0x20) & 0xfd); return 0; } static int cx24123_pll_tune(struct dvb_frontend *fe) { struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct cx24123_state *state = fe->demodulator_priv; u8 val; dprintk("frequency=%i\n", p->frequency); if (cx24123_pll_calculate(fe) != 0) { err("%s: cx24123_pll_calcutate failed\n", __func__); return -EINVAL; } /* Write the new VCO/VGA */ cx24123_pll_writereg(fe, state->VCAarg); cx24123_pll_writereg(fe, state->VGAarg); /* Write the new bandselect and pll args */ cx24123_pll_writereg(fe, state->bandselectarg); cx24123_pll_writereg(fe, state->pllarg); /* set the FILTUNE voltage */ val = cx24123_readreg(state, 0x28) & ~0x3; cx24123_writereg(state, 0x27, state->FILTune >> 2); cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3)); dprintk("pll tune VCA=%d, band=%d, pll=%d\n", state->VCAarg, state->bandselectarg, state->pllarg); return 0; } /* * 0x23: * [7:7] = BTI enabled * [6:6] = I2C repeater enabled * [5:5] = I2C repeater start * [0:0] = BTI start */ /* mode == 1 -> i2c-repeater, 0 -> bti */ static int cx24123_repeater_mode(struct cx24123_state *state, u8 mode, u8 start) { u8 r = cx24123_readreg(state, 0x23) & 0x1e; if (mode) r |= (1 << 6) | (start << 5); else r |= (1 << 7) | (start); return cx24123_writereg(state, 0x23, r); } static int cx24123_initfe(struct dvb_frontend *fe) { struct cx24123_state *state = fe->demodulator_priv; int i; dprintk("init frontend\n"); /* Configure the demod to a good set of defaults */ for (i = 0; i < ARRAY_SIZE(cx24123_regdata); i++) cx24123_writereg(state, cx24123_regdata[i].reg, cx24123_regdata[i].data); /* Set the LNB polarity */ if (state->config->lnb_polarity) cx24123_writereg(state, 0x32, cx24123_readreg(state, 0x32) | 0x02); if (state->config->dont_use_pll) cx24123_repeater_mode(state, 1, 0); return 0; } static int cx24123_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) { struct cx24123_state *state = fe->demodulator_priv; u8 val; val = cx24123_readreg(state, 0x29) & ~0x40; switch (voltage) { case SEC_VOLTAGE_13: dprintk("setting voltage 13V\n"); return cx24123_writereg(state, 0x29, val & 0x7f); case SEC_VOLTAGE_18: dprintk("setting voltage 18V\n"); return cx24123_writereg(state, 0x29, val | 0x80); case SEC_VOLTAGE_OFF: /* already handled in cx88-dvb */ return 0; default: return -EINVAL; }; return 0; } /* wait for diseqc queue to become ready (or timeout) */ static void cx24123_wait_for_diseqc(struct cx24123_state *state) { unsigned long timeout = jiffies + msecs_to_jiffies(200); while (!(cx24123_readreg(state, 0x29) & 0x40)) { if (time_after(jiffies, timeout)) { err("%s: diseqc queue not ready, " \ "command may be lost.\n", __func__); break; } msleep(10); } } static int cx24123_send_diseqc_msg(struct dvb_frontend *fe, struct dvb_diseqc_master_cmd *cmd) { struct cx24123_state *state = fe->demodulator_priv; int i, val, tone; dprintk("\n"); /* stop continuous tone if enabled */ tone = cx24123_readreg(state, 0x29); if (tone & 0x10) cx24123_writereg(state, 0x29, tone & ~0x50); /* wait for diseqc queue ready */ cx24123_wait_for_diseqc(state); /* select tone mode */ cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb); for (i = 0; i < cmd->msg_len; i++) cx24123_writereg(state, 0x2C + i, cmd->msg[i]); val = cx24123_readreg(state, 0x29); cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) | ((cmd->msg_len-3) & 3)); /* wait for diseqc message to finish sending */ cx24123_wait_for_diseqc(state); /* restart continuous tone if enabled */ if (tone & 0x10) cx24123_writereg(state, 0x29, tone & ~0x40); return 0; } static int cx24123_diseqc_send_burst(struct dvb_frontend *fe, fe_sec_mini_cmd_t burst) { struct cx24123_state *state = fe->demodulator_priv; int val, tone; dprintk("\n"); /* stop continuous tone if enabled */ tone = cx24123_readreg(state, 0x29); if (tone & 0x10) cx24123_writereg(state, 0x29, tone & ~0x50); /* wait for diseqc queue ready */ cx24123_wait_for_diseqc(state); /* select tone mode */ cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) | 0x4); msleep(30); val = cx24123_readreg(state, 0x29); if (burst == SEC_MINI_A) cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00)); else if (burst == SEC_MINI_B) cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08)); else return -EINVAL; cx24123_wait_for_diseqc(state); cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xfb); /* restart continuous tone if enabled */ if (tone & 0x10) cx24123_writereg(state, 0x29, tone & ~0x40); return 0; } static int cx24123_read_status(struct dvb_frontend *fe, fe_status_t *status) { struct cx24123_state *state = fe->demodulator_priv; int sync = cx24123_readreg(state, 0x14); *status = 0; if (state->config->dont_use_pll) { u32 tun_status = 0; if (fe->ops.tuner_ops.get_status) fe->ops.tuner_ops.get_status(fe, &tun_status); if (tun_status & TUNER_STATUS_LOCKED) *status |= FE_HAS_SIGNAL; } else { int lock = cx24123_readreg(state, 0x20); if (lock & 0x01) *status |= FE_HAS_SIGNAL; } if (sync & 0x02) *status |= FE_HAS_CARRIER; /* Phase locked */ if (sync & 0x04) *status |= FE_HAS_VITERBI; /* Reed-Solomon Status */ if (sync & 0x08) *status |= FE_HAS_SYNC; if (sync & 0x80) *status |= FE_HAS_LOCK; /*Full Sync */ return 0; } /* * Configured to return the measurement of errors in blocks, * because no UCBLOCKS value is available, so this value doubles up * to satisfy both measurements. */ static int cx24123_read_ber(struct dvb_frontend *fe, u32 *ber) { struct cx24123_state *state = fe->demodulator_priv; /* The true bit error rate is this value divided by the window size (set as 256 * 255) */ *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) | (cx24123_readreg(state, 0x1d) << 8 | cx24123_readreg(state, 0x1e)); dprintk("BER = %d\n", *ber); return 0; } static int cx24123_read_signal_strength(struct dvb_frontend *fe, u16 *signal_strength) { struct cx24123_state *state = fe->demodulator_priv; /* larger = better */ *signal_strength = cx24123_readreg(state, 0x3b) << 8; dprintk("Signal strength = %d\n", *signal_strength); return 0; } static int cx24123_read_snr(struct dvb_frontend *fe, u16 *snr) { struct cx24123_state *state = fe->demodulator_priv; /* Inverted raw Es/N0 count, totally bogus but better than the BER threshold. */ *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) | (u16)cx24123_readreg(state, 0x19)); dprintk("read S/N index = %d\n", *snr); return 0; } static int cx24123_set_frontend(struct dvb_frontend *fe) { struct cx24123_state *state = fe->demodulator_priv; struct dtv_frontend_properties *p = &fe->dtv_property_cache; dprintk("\n"); if (state->config->set_ts_params) state->config->set_ts_params(fe, 0); state->currentfreq = p->frequency; state->currentsymbolrate = p->symbol_rate; cx24123_set_inversion(state, p->inversion); cx24123_set_fec(state, p->fec_inner); cx24123_set_symbolrate(state, p->symbol_rate); if (!state->config->dont_use_pll) cx24123_pll_tune(fe); else if (fe->ops.tuner_ops.set_params) fe->ops.tuner_ops.set_params(fe); else err("it seems I don't have a tuner..."); /* Enable automatic acquisition and reset cycle */ cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07)); cx24123_writereg(state, 0x00, 0x10); cx24123_writereg(state, 0x00, 0); if (state->config->agc_callback) state->config->agc_callback(fe); return 0; } static int cx24123_get_frontend(struct dvb_frontend *fe) { struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct cx24123_state *state = fe->demodulator_priv; dprintk("\n"); if (cx24123_get_inversion(state, &p->inversion) != 0) { err("%s: Failed to get inversion status\n", __func__); return -EREMOTEIO; } if (cx24123_get_fec(state, &p->fec_inner) != 0) { err("%s: Failed to get fec status\n", __func__); return -EREMOTEIO; } p->frequency = state->currentfreq; p->symbol_rate = state->currentsymbolrate; return 0; } static int cx24123_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone) { struct cx24123_state *state = fe->demodulator_priv; u8 val; /* wait for diseqc queue ready */ cx24123_wait_for_diseqc(state); val = cx24123_readreg(state, 0x29) & ~0x40; switch (tone) { case SEC_TONE_ON: dprintk("setting tone on\n"); return cx24123_writereg(state, 0x29, val | 0x10); case SEC_TONE_OFF: dprintk("setting tone off\n"); return cx24123_writereg(state, 0x29, val & 0xef); default: err("CASE reached default with tone=%d\n", tone); return -EINVAL; } return 0; } static int cx24123_tune(struct dvb_frontend *fe, bool re_tune, unsigned int mode_flags, unsigned int *delay, fe_status_t *status) { int retval = 0; if (re_tune) retval = cx24123_set_frontend(fe); if (!(mode_flags & FE_TUNE_MODE_ONESHOT)) cx24123_read_status(fe, status); *delay = HZ/10; return retval; } static int cx24123_get_algo(struct dvb_frontend *fe) { return 1; /* FE_ALGO_HW */ } static void cx24123_release(struct dvb_frontend *fe) { struct cx24123_state *state = fe->demodulator_priv; dprintk("\n"); i2c_del_adapter(&state->tuner_i2c_adapter); kfree(state); } static int cx24123_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num) { struct cx24123_state *state = i2c_get_adapdata(i2c_adap); /* this repeater closes after the first stop */ cx24123_repeater_mode(state, 1, 1); return i2c_transfer(state->i2c, msg, num); } static u32 cx24123_tuner_i2c_func(struct i2c_adapter *adapter) { return I2C_FUNC_I2C; } static struct i2c_algorithm cx24123_tuner_i2c_algo = { .master_xfer = cx24123_tuner_i2c_tuner_xfer, .functionality = cx24123_tuner_i2c_func, }; struct i2c_adapter * cx24123_get_tuner_i2c_adapter(struct dvb_frontend *fe) { struct cx24123_state *state = fe->demodulator_priv; return &state->tuner_i2c_adapter; } EXPORT_SYMBOL(cx24123_get_tuner_i2c_adapter); static struct dvb_frontend_ops cx24123_ops; struct dvb_frontend *cx24123_attach(const struct cx24123_config *config, struct i2c_adapter *i2c) { /* allocate memory for the internal state */ struct cx24123_state *state = kzalloc(sizeof(struct cx24123_state), GFP_KERNEL); dprintk("\n"); if (state == NULL) { err("Unable to kzalloc\n"); goto error; } /* setup the state */ state->config = config; state->i2c = i2c; /* check if the demod is there */ state->demod_rev = cx24123_readreg(state, 0x00); switch (state->demod_rev) { case 0xe1: info("detected CX24123C\n"); break; case 0xd1: info("detected CX24123\n"); break; default: err("wrong demod revision: %x\n", state->demod_rev); goto error; } /* create dvb_frontend */ memcpy(&state->frontend.ops, &cx24123_ops, sizeof(struct dvb_frontend_ops)); state->frontend.demodulator_priv = state; /* create tuner i2c adapter */ if (config->dont_use_pll) cx24123_repeater_mode(state, 1, 0); strlcpy(state->tuner_i2c_adapter.name, "CX24123 tuner I2C bus", sizeof(state->tuner_i2c_adapter.name)); state->tuner_i2c_adapter.algo = &cx24123_tuner_i2c_algo; state->tuner_i2c_adapter.algo_data = NULL; i2c_set_adapdata(&state->tuner_i2c_adapter, state); if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) { err("tuner i2c bus could not be initialized\n"); goto error; } return &state->frontend; error: kfree(state); return NULL; } EXPORT_SYMBOL(cx24123_attach); static struct dvb_frontend_ops cx24123_ops = { .delsys = { SYS_DVBS }, .info = { .name = "Conexant CX24123/CX24109", .frequency_min = 950000, .frequency_max = 2150000, .frequency_stepsize = 1011, /* kHz for QPSK frontends */ .frequency_tolerance = 5000, .symbol_rate_min = 1000000, .symbol_rate_max = 45000000, .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | FE_CAN_QPSK | FE_CAN_RECOVER }, .release = cx24123_release, .init = cx24123_initfe, .set_frontend = cx24123_set_frontend, .get_frontend = cx24123_get_frontend, .read_status = cx24123_read_status, .read_ber = cx24123_read_ber, .read_signal_strength = cx24123_read_signal_strength, .read_snr = cx24123_read_snr, .diseqc_send_master_cmd = cx24123_send_diseqc_msg, .diseqc_send_burst = cx24123_diseqc_send_burst, .set_tone = cx24123_set_tone, .set_voltage = cx24123_set_voltage, .tune = cx24123_tune, .get_frontend_algo = cx24123_get_algo, }; MODULE_DESCRIPTION("DVB Frontend module for Conexant " \ "CX24123/CX24109/CX24113 hardware"); MODULE_AUTHOR("Steven Toth"); MODULE_LICENSE("GPL");