/* 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/string.h> #include <linux/slab.h> #include <linux/jiffies.h> #include "dvb_frontend.h" #include "tda8083.h" struct tda8083_state { struct i2c_adapter* i2c; /* 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", __func__, 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", __func__, 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 = 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 = 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 & 0x20) /* frontend can not lock */ *status |= FE_TIMEDOUT; if ((sync & 0x1f) == 0x1f) *status |= FE_HAS_LOCK; return 0; } static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber) { struct tda8083_state* state = fe->demodulator_priv; int ret; u8 buf[3]; if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf)))) return ret; *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2]; return 0; } static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength) { struct tda8083_state* 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 = fe->demodulator_priv; u8 _snr = tda8083_readreg (state, 0x08); *snr = (_snr << 8) | _snr; return 0; } static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) { struct tda8083_state* state = fe->demodulator_priv; *ucblocks = tda8083_readreg(state, 0x0f); if (*ucblocks == 0xff) *ucblocks = 0xffffffff; return 0; } static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) { struct tda8083_state* state = fe->demodulator_priv; if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe, p); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } 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 = 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 = fe->demodulator_priv; tda8083_writereg (state, 0x00, 0x02); return 0; } static int tda8083_init(struct dvb_frontend* fe) { struct tda8083_state* state = fe->demodulator_priv; int i; for (i=0; i<44; i++) tda8083_writereg (state, i, tda8083_init_tab[i]); 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 = 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 = 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 = 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 = 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 = kmalloc(sizeof(struct tda8083_state), GFP_KERNEL); if (state == NULL) goto error; /* setup the state */ state->config = config; state->i2c = i2c; /* check if the demod is there */ if ((tda8083_readreg(state, 0x00)) != 0x05) goto error; /* create dvb_frontend */ memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_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 = 920000, /* TDA8060 */ .frequency_max = 2200000, /* TDA8060 */ .frequency_stepsize = 125, /* kHz for QPSK frontends */ /* .frequency_tolerance = ???,*/ .symbol_rate_min = 12000000, .symbol_rate_max = 30000000, /* .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, .read_ber = tda8083_read_ber, .read_ucblocks = tda8083_read_ucblocks, .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);