diff options
Diffstat (limited to 'drivers/media/dvb/frontends/tda8083.c')
| -rw-r--r-- | drivers/media/dvb/frontends/tda8083.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/tda8083.c b/drivers/media/dvb/frontends/tda8083.c new file mode 100644 index 00000000000..da82e90d6d1 --- /dev/null +++ b/drivers/media/dvb/frontends/tda8083.c @@ -0,0 +1,456 @@ +/* + Driver for Philips TDA8083 based QPSK Demodulator + + Copyright (C) 2001 Convergence Integrated Media GmbH + + written by Ralph Metzler <ralph@convergence.de> + + adoption to the new DVB frontend API and diagnostic ioctl's + by Holger Waechtler <holger@convergence.de> + + 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/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/string.h> +#include <linux/slab.h> +#include "dvb_frontend.h" +#include "tda8083.h" + + +struct tda8083_state { + struct i2c_adapter* i2c; + struct dvb_frontend_ops ops; + /* configuration settings */ + const struct tda8083_config* config; + struct dvb_frontend frontend; +}; + +static int debug; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "tda8083: " args); \ + } while (0) + + +static u8 tda8083_init_tab [] = { + 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea, + 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10, + 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8, + 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00, + 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 +}; + + +static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data) +{ + int ret; + u8 buf [] = { reg, data }; + struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; + + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + dprintk ("%s: writereg error (reg %02x, ret == %i)\n", + __FUNCTION__, reg, ret); + + return (ret != 1) ? -1 : 0; +} + +static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len) +{ + int ret; + struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) + dprintk ("%s: readreg error (reg %02x, ret == %i)\n", + __FUNCTION__, reg1, ret); + + return ret == 2 ? 0 : -1; +} + +static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg) +{ + u8 val; + + tda8083_readregs (state, reg, &val, 1); + + return val; +} + +static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion) +{ + /* XXX FIXME: implement other modes than FEC_AUTO */ + if (inversion == INVERSION_AUTO) + return 0; + + return -EINVAL; +} + +static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec) +{ + if (fec == FEC_AUTO) + return tda8083_writereg (state, 0x07, 0xff); + + if (fec >= FEC_1_2 && fec <= FEC_8_9) + return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec)); + + return -EINVAL; +} + +static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state) +{ + u8 index; + static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4, + FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 }; + + index = tda8083_readreg(state, 0x0e) & 0x07; + + return fec_tab [index]; +} + +static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate) +{ + u32 ratio; + u32 tmp; + u8 filter; + + if (srate > 32000000) + srate = 32000000; + if (srate < 500000) + srate = 500000; + + filter = 0; + if (srate < 24000000) + filter = 2; + if (srate < 16000000) + filter = 3; + + tmp = 31250 << 16; + ratio = tmp / srate; + + tmp = (tmp % srate) << 8; + ratio = (ratio << 8) + tmp / srate; + + tmp = (tmp % srate) << 8; + ratio = (ratio << 8) + tmp / srate; + + dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio); + + tda8083_writereg (state, 0x05, filter); + tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff); + tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff); + tda8083_writereg (state, 0x04, (ratio ) & 0xff); + + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 1; +} + +static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout) +{ + unsigned long start = jiffies; + + while (jiffies - start < timeout && + !(tda8083_readreg(state, 0x02) & 0x80)) + { + msleep(50); + }; +} + +static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone) +{ + tda8083_writereg (state, 0x26, 0xf1); + + switch (tone) { + case SEC_TONE_OFF: + return tda8083_writereg (state, 0x29, 0x00); + case SEC_TONE_ON: + return tda8083_writereg (state, 0x29, 0x80); + default: + return -EINVAL; + }; +} + +static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage) +{ + switch (voltage) { + case SEC_VOLTAGE_13: + return tda8083_writereg (state, 0x20, 0x00); + case SEC_VOLTAGE_18: + return tda8083_writereg (state, 0x20, 0x11); + default: + return -EINVAL; + }; +} + +static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst) +{ + switch (burst) { + case SEC_MINI_A: + tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */ + break; + case SEC_MINI_B: + tda8083_writereg (state, 0x29, (7 << 2)); /* send B */ + break; + default: + return -EINVAL; + }; + + tda8083_wait_diseqc_fifo (state, 100); + + return 0; +} + +static int tda8083_send_diseqc_msg (struct dvb_frontend* fe, + struct dvb_diseqc_master_cmd *m) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + int i; + + tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */ + + for (i=0; i<m->msg_len; i++) + tda8083_writereg (state, 0x23 + i, m->msg[i]); + + tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */ + + tda8083_wait_diseqc_fifo (state, 100); + + return 0; +} + +static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + u8 signal = ~tda8083_readreg (state, 0x01); + u8 sync = tda8083_readreg (state, 0x02); + + *status = 0; + + if (signal > 10) + *status |= FE_HAS_SIGNAL; + + if (sync & 0x01) + *status |= FE_HAS_CARRIER; + + if (sync & 0x02) + *status |= FE_HAS_VITERBI; + + if (sync & 0x10) + *status |= FE_HAS_SYNC; + + if ((sync & 0x1f) == 0x1f) + *status |= FE_HAS_LOCK; + + return 0; +} + +static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + u8 signal = ~tda8083_readreg (state, 0x01); + *strength = (signal << 8) | signal; + + return 0; +} + +static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + u8 _snr = tda8083_readreg (state, 0x08); + *snr = (_snr << 8) | _snr; + + return 0; +} + +static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + state->config->pll_set(fe, p); + tda8083_set_inversion (state, p->inversion); + tda8083_set_fec (state, p->u.qpsk.fec_inner); + tda8083_set_symbolrate (state, p->u.qpsk.symbol_rate); + + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 0; +} + +static int tda8083_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + /* FIXME: get symbolrate & frequency offset...*/ + /*p->frequency = ???;*/ + p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ? + INVERSION_ON : INVERSION_OFF; + p->u.qpsk.fec_inner = tda8083_get_fec (state); + /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (state);*/ + + return 0; +} + +static int tda8083_sleep(struct dvb_frontend* fe) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + tda8083_writereg (state, 0x00, 0x02); + return 0; +} + +static int tda8083_init(struct dvb_frontend* fe) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + int i; + + for (i=0; i<44; i++) + tda8083_writereg (state, i, tda8083_init_tab[i]); + + if (state->config->pll_init) state->config->pll_init(fe); + + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 0; +} + +static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + tda8083_send_diseqc_burst (state, burst); + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 0; +} + +static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + tda8083_set_tone (state, tone); + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 0; +} + +static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + + tda8083_set_voltage (state, voltage); + tda8083_writereg (state, 0x00, 0x3c); + tda8083_writereg (state, 0x00, 0x04); + + return 0; +} + +static void tda8083_release(struct dvb_frontend* fe) +{ + struct tda8083_state* state = (struct tda8083_state*) fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops tda8083_ops; + +struct dvb_frontend* tda8083_attach(const struct tda8083_config* config, + struct i2c_adapter* i2c) +{ + struct tda8083_state* state = NULL; + + /* allocate memory for the internal state */ + state = (struct tda8083_state*) kmalloc(sizeof(struct tda8083_state), GFP_KERNEL); + if (state == NULL) goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + memcpy(&state->ops, &tda8083_ops, sizeof(struct dvb_frontend_ops)); + + /* check if the demod is there */ + if ((tda8083_readreg(state, 0x00)) != 0x05) 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 tda8083_ops = { + + .info = { + .name = "Philips TDA8083 DVB-S", + .type = FE_QPSK, + .frequency_min = 950000, /* FIXME: guessed! */ + .frequency_max = 1400000, /* FIXME: guessed! */ + .frequency_stepsize = 125, /* kHz for QPSK frontends */ + /* .frequency_tolerance = ???,*/ + .symbol_rate_min = 1000000, /* FIXME: guessed! */ + .symbol_rate_max = 45000000, /* FIXME: guessed! */ + /* .symbol_rate_tolerance = ???,*/ + .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_8_9 | FE_CAN_FEC_AUTO | + FE_CAN_QPSK | FE_CAN_MUTE_TS + }, + + .release = tda8083_release, + + .init = tda8083_init, + .sleep = tda8083_sleep, + + .set_frontend = tda8083_set_frontend, + .get_frontend = tda8083_get_frontend, + + .read_status = tda8083_read_status, + .read_signal_strength = tda8083_read_signal_strength, + .read_snr = tda8083_read_snr, + + .diseqc_send_master_cmd = tda8083_send_diseqc_msg, + .diseqc_send_burst = tda8083_diseqc_send_burst, + .set_tone = tda8083_diseqc_set_tone, + .set_voltage = tda8083_diseqc_set_voltage, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator"); +MODULE_AUTHOR("Ralph Metzler, Holger Waechtler"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(tda8083_attach); |