diff options
Diffstat (limited to 'drivers/media/dvb-frontends/tda10021.c')
| -rw-r--r-- | drivers/media/dvb-frontends/tda10021.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/tda10021.c b/drivers/media/dvb-frontends/tda10021.c new file mode 100644 index 0000000..1bff7f4 --- /dev/null +++ b/drivers/media/dvb-frontends/tda10021.c @@ -0,0 +1,528 @@ +/* + TDA10021 - Single Chip Cable Channel Receiver driver module + used on the Siemens DVB-C cards + + Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de> + Copyright (C) 2004 Markus Schulz <msc@antzsystem.de> + Support for TDA10021 + + 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/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include "dvb_frontend.h" +#include "tda1002x.h" + + +struct tda10021_state { + struct i2c_adapter* i2c; + /* configuration settings */ + const struct tda1002x_config* config; + struct dvb_frontend frontend; + + u8 pwm; + u8 reg0; +}; + + +#if 0 +#define dprintk(x...) printk(x) +#else +#define dprintk(x...) +#endif + +static int verbose; + +#define XIN 57840000UL + +#define FIN (XIN >> 4) + +static int tda10021_inittab_size = 0x40; +static u8 tda10021_inittab[0x40]= +{ + 0x73, 0x6a, 0x23, 0x0a, 0x02, 0x37, 0x77, 0x1a, + 0x37, 0x6a, 0x17, 0x8a, 0x1e, 0x86, 0x43, 0x40, + 0xb8, 0x3f, 0xa1, 0x00, 0xcd, 0x01, 0x00, 0xff, + 0x11, 0x00, 0x7c, 0x31, 0x30, 0x20, 0x00, 0x00, + 0x02, 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00, + 0x07, 0x00, 0x33, 0x11, 0x0d, 0x95, 0x08, 0x58, + 0x00, 0x00, 0x80, 0x00, 0x80, 0xff, 0x00, 0x00, + 0x04, 0x2d, 0x2f, 0xff, 0x00, 0x00, 0x00, 0x00, +}; + +static int _tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data) +{ + u8 buf[] = { reg, data }; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; + int ret; + + ret = i2c_transfer (state->i2c, &msg, 1); + if (ret != 1) + printk("DVB: TDA10021(%d): %s, writereg error " + "(reg == 0x%02x, val == 0x%02x, ret == %i)\n", + state->frontend.dvb->num, __func__, reg, data, ret); + + msleep(10); + return (ret != 1) ? -EREMOTEIO : 0; +} + +static u8 tda10021_readreg (struct tda10021_state* state, u8 reg) +{ + 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 } }; + int ret; + + ret = i2c_transfer (state->i2c, msg, 2); + // Don't print an error message if the id is read. + if (ret != 2 && reg != 0x1a) + printk("DVB: TDA10021: %s: readreg error (ret == %i)\n", + __func__, ret); + return b1[0]; +} + +//get access to tuner +static int lock_tuner(struct tda10021_state* state) +{ + u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] | 0x80 }; + struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2}; + + if(i2c_transfer(state->i2c, &msg, 1) != 1) + { + printk("tda10021: lock tuner fails\n"); + return -EREMOTEIO; + } + return 0; +} + +//release access from tuner +static int unlock_tuner(struct tda10021_state* state) +{ + u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] & 0x7f }; + struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2}; + + if(i2c_transfer(state->i2c, &msg_post, 1) != 1) + { + printk("tda10021: unlock tuner fails\n"); + return -EREMOTEIO; + } + return 0; +} + +static int tda10021_setup_reg0 (struct tda10021_state* state, u8 reg0, + fe_spectral_inversion_t inversion) +{ + reg0 |= state->reg0 & 0x63; + + if ((INVERSION_ON == inversion) ^ (state->config->invert == 0)) + reg0 &= ~0x20; + else + reg0 |= 0x20; + + _tda10021_writereg (state, 0x00, reg0 & 0xfe); + _tda10021_writereg (state, 0x00, reg0 | 0x01); + + state->reg0 = reg0; + return 0; +} + +static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate) +{ + s32 BDR; + s32 BDRI; + s16 SFIL=0; + u16 NDEC = 0; + u32 tmp, ratio; + + if (symbolrate > XIN/2) + symbolrate = XIN/2; + if (symbolrate < 500000) + symbolrate = 500000; + + if (symbolrate < XIN/16) NDEC = 1; + if (symbolrate < XIN/32) NDEC = 2; + if (symbolrate < XIN/64) NDEC = 3; + + if (symbolrate < (u32)(XIN/12.3)) SFIL = 1; + if (symbolrate < (u32)(XIN/16)) SFIL = 0; + if (symbolrate < (u32)(XIN/24.6)) SFIL = 1; + if (symbolrate < (u32)(XIN/32)) SFIL = 0; + if (symbolrate < (u32)(XIN/49.2)) SFIL = 1; + if (symbolrate < (u32)(XIN/64)) SFIL = 0; + if (symbolrate < (u32)(XIN/98.4)) SFIL = 1; + + symbolrate <<= NDEC; + ratio = (symbolrate << 4) / FIN; + tmp = ((symbolrate << 4) % FIN) << 8; + ratio = (ratio << 8) + tmp / FIN; + tmp = (tmp % FIN) << 8; + ratio = (ratio << 8) + DIV_ROUND_CLOSEST(tmp, FIN); + + BDR = ratio; + BDRI = (((XIN << 5) / symbolrate) + 1) / 2; + + if (BDRI > 0xFF) + BDRI = 0xFF; + + SFIL = (SFIL << 4) | tda10021_inittab[0x0E]; + + NDEC = (NDEC << 6) | tda10021_inittab[0x03]; + + _tda10021_writereg (state, 0x03, NDEC); + _tda10021_writereg (state, 0x0a, BDR&0xff); + _tda10021_writereg (state, 0x0b, (BDR>> 8)&0xff); + _tda10021_writereg (state, 0x0c, (BDR>>16)&0x3f); + + _tda10021_writereg (state, 0x0d, BDRI); + _tda10021_writereg (state, 0x0e, SFIL); + + return 0; +} + +static int tda10021_init (struct dvb_frontend *fe) +{ + struct tda10021_state* state = fe->demodulator_priv; + int i; + + dprintk("DVB: TDA10021(%d): init chip\n", fe->adapter->num); + + //_tda10021_writereg (fe, 0, 0); + + for (i=0; i<tda10021_inittab_size; i++) + _tda10021_writereg (state, i, tda10021_inittab[i]); + + _tda10021_writereg (state, 0x34, state->pwm); + + //Comment by markus + //0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0) + //0x2A[4] == BYPPLL -> Power down mode (default 1) + //0x2A[5] == LCK -> PLL Lock Flag + //0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0) + + //Activate PLL + _tda10021_writereg(state, 0x2a, tda10021_inittab[0x2a] & 0xef); + return 0; +} + +struct qam_params { + u8 conf, agcref, lthr, mseth, aref; +}; + +static int tda10021_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + u32 delsys = c->delivery_system; + unsigned qam = c->modulation; + bool is_annex_c; + u32 reg0x3d; + struct tda10021_state* state = fe->demodulator_priv; + static const struct qam_params qam_params[] = { + /* Modulation Conf AGCref LTHR MSETH AREF */ + [QPSK] = { 0x14, 0x78, 0x78, 0x8c, 0x96 }, + [QAM_16] = { 0x00, 0x8c, 0x87, 0xa2, 0x91 }, + [QAM_32] = { 0x04, 0x8c, 0x64, 0x74, 0x96 }, + [QAM_64] = { 0x08, 0x6a, 0x46, 0x43, 0x6a }, + [QAM_128] = { 0x0c, 0x78, 0x36, 0x34, 0x7e }, + [QAM_256] = { 0x10, 0x5c, 0x26, 0x23, 0x6b }, + }; + + switch (delsys) { + case SYS_DVBC_ANNEX_A: + is_annex_c = false; + break; + case SYS_DVBC_ANNEX_C: + is_annex_c = true; + break; + default: + return -EINVAL; + } + + /* + * gcc optimizes the code bellow the same way as it would code: + * "if (qam > 5) return -EINVAL;" + * Yet, the code is clearer, as it shows what QAM standards are + * supported by the driver, and avoids the usage of magic numbers on + * it. + */ + switch (qam) { + case QPSK: + case QAM_16: + case QAM_32: + case QAM_64: + case QAM_128: + case QAM_256: + break; + default: + return -EINVAL; + } + + if (c->inversion != INVERSION_ON && c->inversion != INVERSION_OFF) + return -EINVAL; + + /*printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->symbol_rate);*/ + + if (fe->ops.tuner_ops.set_params) { + fe->ops.tuner_ops.set_params(fe); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); + } + + tda10021_set_symbolrate(state, c->symbol_rate); + _tda10021_writereg(state, 0x34, state->pwm); + + _tda10021_writereg(state, 0x01, qam_params[qam].agcref); + _tda10021_writereg(state, 0x05, qam_params[qam].lthr); + _tda10021_writereg(state, 0x08, qam_params[qam].mseth); + _tda10021_writereg(state, 0x09, qam_params[qam].aref); + + /* + * Bit 0 == 0 means roll-off = 0.15 (Annex A) + * == 1 means roll-off = 0.13 (Annex C) + */ + reg0x3d = tda10021_readreg (state, 0x3d); + if (is_annex_c) + _tda10021_writereg (state, 0x3d, 0x01 | reg0x3d); + else + _tda10021_writereg (state, 0x3d, 0xfe & reg0x3d); + tda10021_setup_reg0(state, qam_params[qam].conf, c->inversion); + + return 0; +} + +static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct tda10021_state* state = fe->demodulator_priv; + int sync; + + *status = 0; + //0x11[0] == EQALGO -> Equalizer algorithms state + //0x11[1] == CARLOCK -> Carrier locked + //0x11[2] == FSYNC -> Frame synchronisation + //0x11[3] == FEL -> Front End locked + //0x11[6] == NODVB -> DVB Mode Information + sync = tda10021_readreg (state, 0x11); + + if (sync & 2) + *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER; + + if (sync & 4) + *status |= FE_HAS_SYNC|FE_HAS_VITERBI; + + if (sync & 8) + *status |= FE_HAS_LOCK; + + return 0; +} + +static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct tda10021_state* state = fe->demodulator_priv; + + u32 _ber = tda10021_readreg(state, 0x14) | + (tda10021_readreg(state, 0x15) << 8) | + ((tda10021_readreg(state, 0x16) & 0x0f) << 16); + _tda10021_writereg(state, 0x10, (tda10021_readreg(state, 0x10) & ~0xc0) + | (tda10021_inittab[0x10] & 0xc0)); + *ber = 10 * _ber; + + return 0; +} + +static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct tda10021_state* state = fe->demodulator_priv; + + u8 config = tda10021_readreg(state, 0x02); + u8 gain = tda10021_readreg(state, 0x17); + if (config & 0x02) + /* the agc value is inverted */ + gain = ~gain; + *strength = (gain << 8) | gain; + + return 0; +} + +static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct tda10021_state* state = fe->demodulator_priv; + + u8 quality = ~tda10021_readreg(state, 0x18); + *snr = (quality << 8) | quality; + + return 0; +} + +static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct tda10021_state* state = fe->demodulator_priv; + + *ucblocks = tda10021_readreg (state, 0x13) & 0x7f; + if (*ucblocks == 0x7f) + *ucblocks = 0xffffffff; + + /* reset uncorrected block counter */ + _tda10021_writereg (state, 0x10, tda10021_inittab[0x10] & 0xdf); + _tda10021_writereg (state, 0x10, tda10021_inittab[0x10]); + + return 0; +} + +static int tda10021_get_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct tda10021_state* state = fe->demodulator_priv; + int sync; + s8 afc = 0; + + sync = tda10021_readreg(state, 0x11); + afc = tda10021_readreg(state, 0x19); + if (verbose) { + /* AFC only valid when carrier has been recovered */ + printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" : + "DVB: TDA10021(%d): [AFC (%d) %dHz]\n", + state->frontend.dvb->num, afc, + -((s32)p->symbol_rate * afc) >> 10); + } + + p->inversion = ((state->reg0 & 0x20) == 0x20) ^ (state->config->invert != 0) ? INVERSION_ON : INVERSION_OFF; + p->modulation = ((state->reg0 >> 2) & 7) + QAM_16; + + p->fec_inner = FEC_NONE; + p->frequency = ((p->frequency + 31250) / 62500) * 62500; + + if (sync & 2) + p->frequency -= ((s32)p->symbol_rate * afc) >> 10; + + return 0; +} + +static int tda10021_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct tda10021_state* state = fe->demodulator_priv; + + if (enable) { + lock_tuner(state); + } else { + unlock_tuner(state); + } + return 0; +} + +static int tda10021_sleep(struct dvb_frontend* fe) +{ + struct tda10021_state* state = fe->demodulator_priv; + + _tda10021_writereg (state, 0x1b, 0x02); /* pdown ADC */ + _tda10021_writereg (state, 0x00, 0x80); /* standby */ + + return 0; +} + +static void tda10021_release(struct dvb_frontend* fe) +{ + struct tda10021_state* state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops tda10021_ops; + +struct dvb_frontend* tda10021_attach(const struct tda1002x_config* config, + struct i2c_adapter* i2c, + u8 pwm) +{ + struct tda10021_state* state = NULL; + u8 id; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct tda10021_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + state->pwm = pwm; + state->reg0 = tda10021_inittab[0]; + + /* check if the demod is there */ + id = tda10021_readreg(state, 0x1a); + if ((id & 0xf0) != 0x70) goto error; + + /* Don't claim TDA10023 */ + if (id == 0x7d) + goto error; + + printk("TDA10021: i2c-addr = 0x%02x, id = 0x%02x\n", + state->config->demod_address, id); + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &tda10021_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops tda10021_ops = { + .delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C }, + .info = { + .name = "Philips TDA10021 DVB-C", + .frequency_stepsize = 62500, + .frequency_min = 47000000, + .frequency_max = 862000000, + .symbol_rate_min = (XIN/2)/64, /* SACLK/64 == (XIN/2)/64 */ + .symbol_rate_max = (XIN/2)/4, /* SACLK/4 */ + #if 0 + .frequency_tolerance = ???, + .symbol_rate_tolerance = ???, /* ppm */ /* == 8% (spec p. 5) */ + #endif + .caps = 0x400 | //FE_CAN_QAM_4 + FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 | + FE_CAN_QAM_128 | FE_CAN_QAM_256 | + FE_CAN_FEC_AUTO + }, + + .release = tda10021_release, + + .init = tda10021_init, + .sleep = tda10021_sleep, + .i2c_gate_ctrl = tda10021_i2c_gate_ctrl, + + .set_frontend = tda10021_set_parameters, + .get_frontend = tda10021_get_frontend, + + .read_status = tda10021_read_status, + .read_ber = tda10021_read_ber, + .read_signal_strength = tda10021_read_signal_strength, + .read_snr = tda10021_read_snr, + .read_ucblocks = tda10021_read_ucblocks, +}; + +module_param(verbose, int, 0644); +MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting"); + +MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver"); +MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(tda10021_attach); |