diff options
Diffstat (limited to 'drivers/media/dvb/frontends/tda10021.c')
| -rw-r--r-- | drivers/media/dvb/frontends/tda10021.c | 469 |
1 files changed, 469 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/tda10021.c b/drivers/media/dvb/frontends/tda10021.c new file mode 100644 index 00000000000..4e40d95ee95 --- /dev/null +++ b/drivers/media/dvb/frontends/tda10021.c @@ -0,0 +1,469 @@ +/* + TDA10021 - Single Chip Cable Channel Receiver driver module + used on the 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/config.h> +#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 "tda10021.h" + + +struct tda10021_state { + struct i2c_adapter* i2c; + struct dvb_frontend_ops ops; + /* configuration settings */ + const struct tda10021_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 DISABLE_INVERSION(reg0) do { reg0 |= 0x20; } while (0) +#define ENABLE_INVERSION(reg0) do { reg0 &= ~0x20; } while (0) +#define HAS_INVERSION(reg0) (!(reg0 & 0x20)) + +#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, 0xa0, 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, __FUNCTION__, 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); + if (ret != 2) + printk("DVB: TDA10021(%d): %s: readreg error (ret == %i)\n", + state->frontend.dvb->num, __FUNCTION__, 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) + ENABLE_INVERSION(reg0); + else if (INVERSION_OFF == inversion) + DISABLE_INVERSION(reg0); + + 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) + (tmp + FIN/2) / 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 = (struct tda10021_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); + + if (state->config->pll_init) { + lock_tuner(state); + state->config->pll_init(fe); + unlock_tuner(state); + } + + return 0; +} + +static int tda10021_set_parameters (struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv; + + //table for QAM4-QAM256 ready QAM4 QAM16 QAM32 QAM64 QAM128 QAM256 + //CONF + static const u8 reg0x00 [] = { 0x14, 0x00, 0x04, 0x08, 0x0c, 0x10 }; + //AGCREF value + static const u8 reg0x01 [] = { 0x78, 0x8c, 0x8c, 0x6a, 0x78, 0x5c }; + //LTHR value + static const u8 reg0x05 [] = { 0x78, 0x87, 0x64, 0x46, 0x36, 0x26 }; + //MSETH + static const u8 reg0x08 [] = { 0x8c, 0xa2, 0x74, 0x43, 0x34, 0x23 }; + //AREF + static const u8 reg0x09 [] = { 0x96, 0x91, 0x96, 0x6a, 0x7e, 0x6b }; + + int qam = p->u.qam.modulation; + + if (qam < 0 || qam > 5) + return -EINVAL; + + //printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->u.qam.symbol_rate); + + lock_tuner(state); + state->config->pll_set(fe, p); + unlock_tuner(state); + + tda10021_set_symbolrate (state, p->u.qam.symbol_rate); + tda10021_writereg (state, 0x34, state->pwm); + + tda10021_writereg (state, 0x01, reg0x01[qam]); + tda10021_writereg (state, 0x05, reg0x05[qam]); + tda10021_writereg (state, 0x08, reg0x08[qam]); + tda10021_writereg (state, 0x09, reg0x09[qam]); + + tda10021_setup_reg0 (state, reg0x00[qam], p->inversion); + + return 0; +} + +static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct tda10021_state* state = (struct tda10021_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 = (struct tda10021_state*) fe->demodulator_priv; + + u32 _ber = tda10021_readreg(state, 0x14) | + (tda10021_readreg(state, 0x15) << 8) | + ((tda10021_readreg(state, 0x16) & 0x0f) << 16); + *ber = 10 * _ber; + + return 0; +} + +static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv; + + u8 gain = tda10021_readreg(state, 0x17); + *strength = (gain << 8) | gain; + + return 0; +} + +static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct tda10021_state* state = (struct tda10021_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 = (struct tda10021_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 dvb_frontend_parameters *p) +{ + struct tda10021_state* state = (struct tda10021_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->u.qam.symbol_rate * afc) >> 10); + } + + p->inversion = HAS_INVERSION(state->reg0) ? INVERSION_ON : INVERSION_OFF; + p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16; + + p->u.qam.fec_inner = FEC_NONE; + p->frequency = ((p->frequency + 31250) / 62500) * 62500; + + if (sync & 2) + p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10; + + return 0; +} + +static int tda10021_sleep(struct dvb_frontend* fe) +{ + struct tda10021_state* state = (struct tda10021_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 = (struct tda10021_state*) fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops tda10021_ops; + +struct dvb_frontend* tda10021_attach(const struct tda10021_config* config, + struct i2c_adapter* i2c, + u8 pwm) +{ + struct tda10021_state* state = NULL; + + /* allocate memory for the internal state */ + state = (struct tda10021_state*) kmalloc(sizeof(struct tda10021_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + memcpy(&state->ops, &tda10021_ops, sizeof(struct dvb_frontend_ops)); + state->pwm = pwm; + state->reg0 = tda10021_inittab[0]; + + /* check if the demod is there */ + if ((tda10021_readreg(state, 0x1a) & 0xf0) != 0x70) goto error; + + /* create dvb_frontend */ + state->frontend.ops = &state->ops; + state->frontend.demodulator_priv = state; + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops tda10021_ops = { + + .info = { + .name = "Philips TDA10021 DVB-C", + .type = FE_QAM, + .frequency_stepsize = 62500, + .frequency_min = 51000000, + .frequency_max = 858000000, + .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, + + .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); |