diff options
Diffstat (limited to 'drivers/media/dvb/frontends/cx24123.c')
| -rw-r--r-- | drivers/media/dvb/frontends/cx24123.c | 1036 |
1 files changed, 0 insertions, 1036 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c deleted file mode 100644 index d74fdbd6336..00000000000 --- a/drivers/media/dvb/frontends/cx24123.c +++ /dev/null @@ -1,1036 +0,0 @@ -/* - Conexant cx24123/cx24109 - DVB QPSK Satellite demod/tuner driver - - Copyright (C) 2005 Steven Toth <stoth@hauppauge.com> - - Support for KWorld DVB-S 100 by Vadim Catana <skystar@moldova.cc> - - 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 <linux/slab.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> - -#include "dvb_frontend.h" -#include "cx24123.h" - -#define XTAL 10111000 - -static int force_band; -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) printk (KERN_DEBUG "cx24123: " 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; - - /* 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 -{ - 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 -{ - 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_writereg(struct cx24123_state* state, int reg, int data) -{ - u8 buf[] = { reg, data }; - struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; - int err; - - if (debug>1) - printk("cx24123: %s: write reg 0x%02x, value 0x%02x\n", - __FUNCTION__,reg, data); - - if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { - printk("%s: writereg error(err == %i, reg == 0x%02x," - " data == 0x%02x)\n", __FUNCTION__, err, reg, data); - return -EREMOTEIO; - } - - return 0; -} - -static int cx24123_readreg(struct cx24123_state* state, u8 reg) -{ - int ret; - u8 b0[] = { reg }; - u8 b1[] = { 0 }; - struct i2c_msg msg[] = { - { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 }, - { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } - }; - - ret = i2c_transfer(state->i2c, msg, 2); - - if (ret != 2) { - printk("%s: reg=0x%x (error=%d)\n", __FUNCTION__, reg, ret); - return ret; - } - - if (debug>1) - printk("cx24123: read reg 0x%02x, value 0x%02x\n",reg, ret); - - return b1[0]; -} - -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("%s: inversion off\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg & ~0x80); - cx24123_writereg(state, 0x10, auto_reg | 0x80); - break; - case INVERSION_ON: - dprintk("%s: inversion on\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x80); - cx24123_writereg(state, 0x10, auto_reg | 0x80); - break; - case INVERSION_AUTO: - dprintk("%s: inversion auto\n",__FUNCTION__); - 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("%s: read inversion off\n",__FUNCTION__); - *inversion = INVERSION_OFF; - } else { - dprintk("%s: read inversion on\n",__FUNCTION__); - *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 ( (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("%s: set FEC to 1/2\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x01); - cx24123_writereg(state, 0x0f, 0x02); - break; - case FEC_2_3: - dprintk("%s: set FEC to 2/3\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x02); - cx24123_writereg(state, 0x0f, 0x04); - break; - case FEC_3_4: - dprintk("%s: set FEC to 3/4\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x03); - cx24123_writereg(state, 0x0f, 0x08); - break; - case FEC_4_5: - dprintk("%s: set FEC to 4/5\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x04); - cx24123_writereg(state, 0x0f, 0x10); - break; - case FEC_5_6: - dprintk("%s: set FEC to 5/6\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x05); - cx24123_writereg(state, 0x0f, 0x20); - break; - case FEC_6_7: - dprintk("%s: set FEC to 6/7\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x06); - cx24123_writereg(state, 0x0f, 0x40); - break; - case FEC_7_8: - dprintk("%s: set FEC to 7/8\n",__FUNCTION__); - cx24123_writereg(state, 0x0e, nom_reg | 0x07); - cx24123_writereg(state, 0x0f, 0x80); - break; - case FEC_AUTO: - dprintk("%s: set FEC to auto\n",__FUNCTION__); - 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) -{ - u32 tmp, 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 - - We have to use 32 bit unsigned arithmetic without precision loss. - The maximum srate is 45000000 or 0x02AEA540. This number has - only 6 clear bits on top, hence we can shift it left only 6 bits - at a time. Borrowed from cx24110.c - */ - - tmp = srate << 6; - ratio = tmp / sample_rate; - - tmp = (tmp % sample_rate) << 6; - ratio = (ratio << 6) + (tmp / sample_rate); - - tmp = (tmp % sample_rate) << 6; - ratio = (ratio << 6) + (tmp / sample_rate); - - tmp = (tmp % sample_rate) << 5; - ratio = (ratio << 5) + (tmp / sample_rate); - - - 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("%s: srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n", __FUNCTION__, 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 dvb_frontend_parameters *p) -{ - 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); - - /* 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++) - { - if ((cx24123_AGC_vals[i].symbolrate_low <= p->u.qpsk.symbol_rate) && - (cx24123_AGC_vals[i].symbolrate_high >= p->u.qpsk.symbol_rate) ) { - state->VCAarg = cx24123_AGC_vals[i].VCAprogdata; - state->VGAarg = cx24123_AGC_vals[i].VGAprogdata; - state->FILTune = cx24123_AGC_vals[i].FILTune; - } - } - - /* determine the band to use */ - if(force_band < 1 || force_band > num_bands) - { - for (i = 0; i < num_bands; i++) - { - if ((cx24123_bandselect_vals[i].freq_low <= p->frequency) && - (cx24123_bandselect_vals[i].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, struct dvb_frontend_parameters *p, u32 data) -{ - struct cx24123_state *state = fe->demodulator_priv; - unsigned long timeout; - - dprintk("%s: pll writereg called, data=0x%08x\n",__FUNCTION__,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)) { - printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); - 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)) { - printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); - 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)) { - printk("%s: demodulator is not responding, possibly hung, aborting.\n", __FUNCTION__); - 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 dvb_frontend_parameters *p) -{ - struct cx24123_state *state = fe->demodulator_priv; - u8 val; - - dprintk("frequency=%i\n", p->frequency); - - if (cx24123_pll_calculate(fe, p) != 0) { - printk("%s: cx24123_pll_calcutate failed\n",__FUNCTION__); - return -EINVAL; - } - - /* Write the new VCO/VGA */ - cx24123_pll_writereg(fe, p, state->VCAarg); - cx24123_pll_writereg(fe, p, state->VGAarg); - - /* Write the new bandselect and pll args */ - cx24123_pll_writereg(fe, p, state->bandselectarg); - cx24123_pll_writereg(fe, p, 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("%s: pll tune VCA=%d, band=%d, pll=%d\n",__FUNCTION__,state->VCAarg, - state->bandselectarg,state->pllarg); - - return 0; -} - -static int cx24123_initfe(struct dvb_frontend* fe) -{ - struct cx24123_state *state = fe->demodulator_priv; - int i; - - dprintk("%s: init frontend\n",__FUNCTION__); - - /* 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); - - 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("%s: setting voltage 13V\n", __FUNCTION__); - return cx24123_writereg(state, 0x29, val & 0x7f); - case SEC_VOLTAGE_18: - dprintk("%s: setting voltage 18V\n", __FUNCTION__); - 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)) { - printk("%s: diseqc queue not ready, command may be lost.\n", __FUNCTION__); - 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("%s:\n",__FUNCTION__); - - /* 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("%s:\n", __FUNCTION__); - - /* 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); - int lock = cx24123_readreg(state, 0x20); - - *status = 0; - 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("%s: BER = %d\n",__FUNCTION__,*ber); - - return 0; -} - -static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) -{ - struct cx24123_state *state = fe->demodulator_priv; - - *signal_strength = cx24123_readreg(state, 0x3b) << 8; /* larger = better */ - - dprintk("%s: Signal strength = %d\n",__FUNCTION__,*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("%s: read S/N index = %d\n",__FUNCTION__,*snr); - - return 0; -} - -static int cx24123_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) -{ - struct cx24123_state *state = fe->demodulator_priv; - - dprintk("%s: set_frontend\n",__FUNCTION__); - - if (state->config->set_ts_params) - state->config->set_ts_params(fe, 0); - - state->currentfreq=p->frequency; - state->currentsymbolrate = p->u.qpsk.symbol_rate; - - cx24123_set_inversion(state, p->inversion); - cx24123_set_fec(state, p->u.qpsk.fec_inner); - cx24123_set_symbolrate(state, p->u.qpsk.symbol_rate); - cx24123_pll_tune(fe, p); - - /* Enable automatic aquisition and reset cycle */ - cx24123_writereg(state, 0x03, (cx24123_readreg(state, 0x03) | 0x07)); - cx24123_writereg(state, 0x00, 0x10); - cx24123_writereg(state, 0x00, 0); - - return 0; -} - -static int cx24123_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) -{ - struct cx24123_state *state = fe->demodulator_priv; - - dprintk("%s: get_frontend\n",__FUNCTION__); - - if (cx24123_get_inversion(state, &p->inversion) != 0) { - printk("%s: Failed to get inversion status\n",__FUNCTION__); - return -EREMOTEIO; - } - if (cx24123_get_fec(state, &p->u.qpsk.fec_inner) != 0) { - printk("%s: Failed to get fec status\n",__FUNCTION__); - return -EREMOTEIO; - } - p->frequency = state->currentfreq; - p->u.qpsk.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("%s: setting tone on\n", __FUNCTION__); - return cx24123_writereg(state, 0x29, val | 0x10); - case SEC_TONE_OFF: - dprintk("%s: setting tone off\n",__FUNCTION__); - return cx24123_writereg(state, 0x29, val & 0xef); - default: - printk("%s: CASE reached default with tone=%d\n", __FUNCTION__, tone); - return -EINVAL; - } - - return 0; -} - -static int cx24123_tune(struct dvb_frontend* fe, - struct dvb_frontend_parameters* params, - unsigned int mode_flags, - unsigned int *delay, - fe_status_t *status) -{ - int retval = 0; - - if (params != NULL) - retval = cx24123_set_frontend(fe, params); - - 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("%s\n",__FUNCTION__); - kfree(state); -} - -static struct dvb_frontend_ops cx24123_ops; - -struct dvb_frontend* cx24123_attach(const struct cx24123_config* config, - struct i2c_adapter* i2c) -{ - struct cx24123_state* state = NULL; - int ret; - - dprintk("%s\n",__FUNCTION__); - - /* allocate memory for the internal state */ - state = kmalloc(sizeof(struct cx24123_state), GFP_KERNEL); - if (state == NULL) { - printk("Unable to kmalloc\n"); - goto error; - } - - /* setup the state */ - state->config = config; - state->i2c = i2c; - state->VCAarg = 0; - state->VGAarg = 0; - state->bandselectarg = 0; - state->pllarg = 0; - state->currentfreq = 0; - state->currentsymbolrate = 0; - - /* check if the demod is there */ - ret = cx24123_readreg(state, 0x00); - if ((ret != 0xd1) && (ret != 0xe1)) { - printk("Version != d1 or e1\n"); - goto error; - } - - /* create dvb_frontend */ - memcpy(&state->frontend.ops, &cx24123_ops, sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - - return NULL; -} - -static struct dvb_frontend_ops cx24123_ops = { - - .info = { - .name = "Conexant CX24123/CX24109", - .type = FE_QPSK, - .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_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); - -module_param(force_band, int, 0644); -MODULE_PARM_DESC(force_band, "Force a specific band select (1-9, default:off)."); - -MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24123/cx24109 hardware"); -MODULE_AUTHOR("Steven Toth"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(cx24123_attach); |