diff options
Diffstat (limited to 'drivers/media/dvb-frontends/tda10086.c')
| -rw-r--r-- | drivers/media/dvb-frontends/tda10086.c | 767 |
1 files changed, 767 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/tda10086.c b/drivers/media/dvb-frontends/tda10086.c new file mode 100644 index 000000000..b449514ae --- /dev/null +++ b/drivers/media/dvb-frontends/tda10086.c @@ -0,0 +1,767 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + /* + Driver for Philips tda10086 DVBS Demodulator + + (c) 2006 Andrew de Quincey + + + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/jiffies.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include <media/dvb_frontend.h> +#include "tda10086.h" + +#define SACLK 96000000U + +struct tda10086_state { + struct i2c_adapter* i2c; + const struct tda10086_config* config; + struct dvb_frontend frontend; + + /* private demod data */ + u32 frequency; + u32 symbol_rate; + bool has_lock; +}; + +static int debug; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "tda10086: " args); \ + } while (0) + +static int tda10086_write_byte(struct tda10086_state *state, int reg, int data) +{ + int ret; + u8 b0[] = { reg, data }; + struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 }; + + msg.addr = state->config->demod_address; + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n", + __func__, reg, data, ret); + + return (ret != 1) ? ret : 0; +} + +static int tda10086_read_byte(struct tda10086_state *state, int reg) +{ + int ret; + u8 b0[] = { reg }; + u8 b1[] = { 0 }; + struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 }, + { .flags = I2C_M_RD, .buf = b1, .len = 1 }}; + + msg[0].addr = state->config->demod_address; + msg[1].addr = state->config->demod_address; + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) { + dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, + ret); + return ret; + } + + return b1[0]; +} + +static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data) +{ + int val; + + /* read a byte and check */ + val = tda10086_read_byte(state, reg); + if (val < 0) + return val; + + /* mask if off */ + val = val & ~mask; + val |= data & 0xff; + + /* write it out again */ + return tda10086_write_byte(state, reg, val); +} + +static int tda10086_init(struct dvb_frontend* fe) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 t22k_off = 0x80; + + dprintk ("%s\n", __func__); + + if (state->config->diseqc_tone) + t22k_off = 0; + /* reset */ + tda10086_write_byte(state, 0x00, 0x00); + msleep(10); + + /* misc setup */ + tda10086_write_byte(state, 0x01, 0x94); + tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */ + tda10086_write_byte(state, 0x03, 0xe4); + tda10086_write_byte(state, 0x04, 0x43); + tda10086_write_byte(state, 0x0c, 0x0c); + tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */ + tda10086_write_byte(state, 0x20, 0x89); /* misc */ + tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */ + tda10086_write_byte(state, 0x32, 0x00); /* irq off */ + tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */ + + /* setup PLL (this assumes SACLK = 96MHz) */ + tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */ + if (state->config->xtal_freq == TDA10086_XTAL_16M) { + tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */ + tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */ + } else { + tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */ + tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */ + } + tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */ + + /* setup TS interface */ + tda10086_write_byte(state, 0x11, 0x81); + tda10086_write_byte(state, 0x12, 0x81); + tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */ + tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */ + tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */ + tda10086_write_byte(state, 0x10, 0x2a); + + /* setup ADC */ + tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */ + tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */ + + /* setup AGC */ + tda10086_write_byte(state, 0x05, 0x0B); + tda10086_write_byte(state, 0x37, 0x63); + tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */ + tda10086_write_byte(state, 0x40, 0x64); + tda10086_write_byte(state, 0x41, 0x4f); + tda10086_write_byte(state, 0x42, 0x43); + + /* setup viterbi */ + tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */ + + /* setup carrier recovery */ + tda10086_write_byte(state, 0x3d, 0x80); + + /* setup SEC */ + tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */ + tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000))); + tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8); + + return 0; +} + +static void tda10086_diseqc_wait(struct tda10086_state *state) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(200); + while (!(tda10086_read_byte(state, 0x50) & 0x01)) { + if(time_after(jiffies, timeout)) { + printk("%s: diseqc queue not ready, command may be lost.\n", __func__); + break; + } + msleep(10); + } +} + +static int tda10086_set_tone(struct dvb_frontend *fe, + enum fe_sec_tone_mode tone) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 t22k_off = 0x80; + + dprintk ("%s\n", __func__); + + if (state->config->diseqc_tone) + t22k_off = 0; + + switch (tone) { + case SEC_TONE_OFF: + tda10086_write_byte(state, 0x36, t22k_off); + break; + + case SEC_TONE_ON: + tda10086_write_byte(state, 0x36, 0x01 + t22k_off); + break; + } + + return 0; +} + +static int tda10086_send_master_cmd (struct dvb_frontend* fe, + struct dvb_diseqc_master_cmd* cmd) +{ + struct tda10086_state* state = fe->demodulator_priv; + int i; + u8 oldval; + u8 t22k_off = 0x80; + + dprintk ("%s\n", __func__); + + if (state->config->diseqc_tone) + t22k_off = 0; + + if (cmd->msg_len > 6) + return -EINVAL; + oldval = tda10086_read_byte(state, 0x36); + + for(i=0; i< cmd->msg_len; i++) { + tda10086_write_byte(state, 0x48+i, cmd->msg[i]); + } + tda10086_write_byte(state, 0x36, (0x08 + t22k_off) + | ((cmd->msg_len - 1) << 4)); + + tda10086_diseqc_wait(state); + + tda10086_write_byte(state, 0x36, oldval); + + return 0; +} + +static int tda10086_send_burst(struct dvb_frontend *fe, + enum fe_sec_mini_cmd minicmd) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 oldval = tda10086_read_byte(state, 0x36); + u8 t22k_off = 0x80; + + dprintk ("%s\n", __func__); + + if (state->config->diseqc_tone) + t22k_off = 0; + + switch(minicmd) { + case SEC_MINI_A: + tda10086_write_byte(state, 0x36, 0x04 + t22k_off); + break; + + case SEC_MINI_B: + tda10086_write_byte(state, 0x36, 0x06 + t22k_off); + break; + } + + tda10086_diseqc_wait(state); + + tda10086_write_byte(state, 0x36, oldval); + + return 0; +} + +static int tda10086_set_inversion(struct tda10086_state *state, + struct dtv_frontend_properties *fe_params) +{ + u8 invval = 0x80; + + dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert); + + switch(fe_params->inversion) { + case INVERSION_OFF: + if (state->config->invert) + invval = 0x40; + break; + case INVERSION_ON: + if (!state->config->invert) + invval = 0x40; + break; + case INVERSION_AUTO: + invval = 0x00; + break; + } + tda10086_write_mask(state, 0x0c, 0xc0, invval); + + return 0; +} + +static int tda10086_set_symbol_rate(struct tda10086_state *state, + struct dtv_frontend_properties *fe_params) +{ + u8 dfn = 0; + u8 afs = 0; + u8 byp = 0; + u8 reg37 = 0x43; + u8 reg42 = 0x43; + u64 big; + u32 tmp; + u32 bdr; + u32 bdri; + u32 symbol_rate = fe_params->symbol_rate; + + dprintk ("%s %i\n", __func__, symbol_rate); + + /* setup the decimation and anti-aliasing filters.. */ + if (symbol_rate < SACLK / 10000 * 137) { + dfn=4; + afs=1; + } else if (symbol_rate < SACLK / 10000 * 208) { + dfn=4; + afs=0; + } else if (symbol_rate < SACLK / 10000 * 270) { + dfn=3; + afs=1; + } else if (symbol_rate < SACLK / 10000 * 416) { + dfn=3; + afs=0; + } else if (symbol_rate < SACLK / 10000 * 550) { + dfn=2; + afs=1; + } else if (symbol_rate < SACLK / 10000 * 833) { + dfn=2; + afs=0; + } else if (symbol_rate < SACLK / 10000 * 1100) { + dfn=1; + afs=1; + } else if (symbol_rate < SACLK / 10000 * 1666) { + dfn=1; + afs=0; + } else if (symbol_rate < SACLK / 10000 * 2200) { + dfn=0; + afs=1; + } else if (symbol_rate < SACLK / 10000 * 3333) { + dfn=0; + afs=0; + } else { + reg37 = 0x63; + reg42 = 0x4f; + byp=1; + } + + /* calculate BDR */ + big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn); + big += ((SACLK/1000ULL)-1ULL); + do_div(big, (SACLK/1000ULL)); + bdr = big & 0xfffff; + + /* calculate BDRI */ + tmp = (1<<dfn)*(symbol_rate/1000); + bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp; + + tda10086_write_byte(state, 0x21, (afs << 7) | dfn); + tda10086_write_mask(state, 0x20, 0x08, byp << 3); + tda10086_write_byte(state, 0x06, bdr); + tda10086_write_byte(state, 0x07, bdr >> 8); + tda10086_write_byte(state, 0x08, bdr >> 16); + tda10086_write_byte(state, 0x09, bdri); + tda10086_write_byte(state, 0x37, reg37); + tda10086_write_byte(state, 0x42, reg42); + + return 0; +} + +static int tda10086_set_fec(struct tda10086_state *state, + struct dtv_frontend_properties *fe_params) +{ + u8 fecval; + + dprintk("%s %i\n", __func__, fe_params->fec_inner); + + switch (fe_params->fec_inner) { + case FEC_1_2: + fecval = 0x00; + break; + case FEC_2_3: + fecval = 0x01; + break; + case FEC_3_4: + fecval = 0x02; + break; + case FEC_4_5: + fecval = 0x03; + break; + case FEC_5_6: + fecval = 0x04; + break; + case FEC_6_7: + fecval = 0x05; + break; + case FEC_7_8: + fecval = 0x06; + break; + case FEC_8_9: + fecval = 0x07; + break; + case FEC_AUTO: + fecval = 0x08; + break; + default: + return -1; + } + tda10086_write_byte(state, 0x0d, fecval); + + return 0; +} + +static int tda10086_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache; + struct tda10086_state *state = fe->demodulator_priv; + int ret; + u32 freq = 0; + int freqoff; + + dprintk ("%s\n", __func__); + + /* modify parameters for tuning */ + tda10086_write_byte(state, 0x02, 0x35); + state->has_lock = false; + + /* set params */ + 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); + + if (fe->ops.tuner_ops.get_frequency) + fe->ops.tuner_ops.get_frequency(fe, &freq); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + + /* calculate the frequency offset (in *Hz* not kHz) */ + freqoff = fe_params->frequency - freq; + freqoff = ((1<<16) * freqoff) / (SACLK/1000); + tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f)); + tda10086_write_byte(state, 0x3e, freqoff); + + if ((ret = tda10086_set_inversion(state, fe_params)) < 0) + return ret; + if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0) + return ret; + if ((ret = tda10086_set_fec(state, fe_params)) < 0) + return ret; + + /* soft reset + disable TS output until lock */ + tda10086_write_mask(state, 0x10, 0x40, 0x40); + tda10086_write_mask(state, 0x00, 0x01, 0x00); + + state->symbol_rate = fe_params->symbol_rate; + state->frequency = fe_params->frequency; + return 0; +} + +static int tda10086_get_frontend(struct dvb_frontend *fe, + struct dtv_frontend_properties *fe_params) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 val; + int tmp; + u64 tmp64; + + dprintk ("%s\n", __func__); + + /* check for invalid symbol rate */ + if (fe_params->symbol_rate < 500000) + return -EINVAL; + + /* calculate the updated frequency (note: we convert from Hz->kHz) */ + tmp64 = ((u64)tda10086_read_byte(state, 0x52) + | (tda10086_read_byte(state, 0x51) << 8)); + if (tmp64 & 0x8000) + tmp64 |= 0xffffffffffff0000ULL; + tmp64 = (tmp64 * (SACLK/1000ULL)); + do_div(tmp64, (1ULL<<15) * (1ULL<<1)); + fe_params->frequency = (int) state->frequency + (int) tmp64; + + /* the inversion */ + val = tda10086_read_byte(state, 0x0c); + if (val & 0x80) { + switch(val & 0x40) { + case 0x00: + fe_params->inversion = INVERSION_OFF; + if (state->config->invert) + fe_params->inversion = INVERSION_ON; + break; + default: + fe_params->inversion = INVERSION_ON; + if (state->config->invert) + fe_params->inversion = INVERSION_OFF; + break; + } + } else { + tda10086_read_byte(state, 0x0f); + switch(val & 0x02) { + case 0x00: + fe_params->inversion = INVERSION_OFF; + if (state->config->invert) + fe_params->inversion = INVERSION_ON; + break; + default: + fe_params->inversion = INVERSION_ON; + if (state->config->invert) + fe_params->inversion = INVERSION_OFF; + break; + } + } + + /* calculate the updated symbol rate */ + tmp = tda10086_read_byte(state, 0x1d); + if (tmp & 0x80) + tmp |= 0xffffff00; + tmp = (tmp * 480 * (1<<1)) / 128; + tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000); + fe_params->symbol_rate = state->symbol_rate + tmp; + + /* the FEC */ + val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4; + switch(val) { + case 0x00: + fe_params->fec_inner = FEC_1_2; + break; + case 0x01: + fe_params->fec_inner = FEC_2_3; + break; + case 0x02: + fe_params->fec_inner = FEC_3_4; + break; + case 0x03: + fe_params->fec_inner = FEC_4_5; + break; + case 0x04: + fe_params->fec_inner = FEC_5_6; + break; + case 0x05: + fe_params->fec_inner = FEC_6_7; + break; + case 0x06: + fe_params->fec_inner = FEC_7_8; + break; + case 0x07: + fe_params->fec_inner = FEC_8_9; + break; + } + + return 0; +} + +static int tda10086_read_status(struct dvb_frontend *fe, + enum fe_status *fe_status) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 val; + + dprintk ("%s\n", __func__); + + val = tda10086_read_byte(state, 0x0e); + *fe_status = 0; + if (val & 0x01) + *fe_status |= FE_HAS_SIGNAL; + if (val & 0x02) + *fe_status |= FE_HAS_CARRIER; + if (val & 0x04) + *fe_status |= FE_HAS_VITERBI; + if (val & 0x08) + *fe_status |= FE_HAS_SYNC; + if (val & 0x10) { + *fe_status |= FE_HAS_LOCK; + if (!state->has_lock) { + state->has_lock = true; + /* modify parameters for stable reception */ + tda10086_write_byte(state, 0x02, 0x00); + } + } + + return 0; +} + +static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 _str; + + dprintk ("%s\n", __func__); + + _str = 0xff - tda10086_read_byte(state, 0x43); + *signal = (_str << 8) | _str; + + return 0; +} + +static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr) +{ + struct tda10086_state* state = fe->demodulator_priv; + u8 _snr; + + dprintk ("%s\n", __func__); + + _snr = 0xff - tda10086_read_byte(state, 0x1c); + *snr = (_snr << 8) | _snr; + + return 0; +} + +static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct tda10086_state* state = fe->demodulator_priv; + + dprintk ("%s\n", __func__); + + /* read it */ + *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f; + + /* reset counter */ + tda10086_write_byte(state, 0x18, 0x00); + tda10086_write_byte(state, 0x18, 0x80); + + return 0; +} + +static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber) +{ + struct tda10086_state* state = fe->demodulator_priv; + + dprintk ("%s\n", __func__); + + /* read it */ + *ber = 0; + *ber |= tda10086_read_byte(state, 0x15); + *ber |= tda10086_read_byte(state, 0x16) << 8; + *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16; + + return 0; +} + +static int tda10086_sleep(struct dvb_frontend* fe) +{ + struct tda10086_state* state = fe->demodulator_priv; + + dprintk ("%s\n", __func__); + + tda10086_write_mask(state, 0x00, 0x08, 0x08); + + return 0; +} + +static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct tda10086_state* state = fe->demodulator_priv; + + dprintk ("%s\n", __func__); + + if (enable) { + tda10086_write_mask(state, 0x00, 0x10, 0x10); + } else { + tda10086_write_mask(state, 0x00, 0x10, 0x00); + } + + return 0; +} + +static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + + if (p->symbol_rate > 20000000) { + fesettings->min_delay_ms = 50; + fesettings->step_size = 2000; + fesettings->max_drift = 8000; + } else if (p->symbol_rate > 12000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 1500; + fesettings->max_drift = 9000; + } else if (p->symbol_rate > 8000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 1000; + fesettings->max_drift = 8000; + } else if (p->symbol_rate > 4000000) { + fesettings->min_delay_ms = 100; + fesettings->step_size = 500; + fesettings->max_drift = 7000; + } else if (p->symbol_rate > 2000000) { + fesettings->min_delay_ms = 200; + fesettings->step_size = p->symbol_rate / 8000; + fesettings->max_drift = 14 * fesettings->step_size; + } else { + fesettings->min_delay_ms = 200; + fesettings->step_size = p->symbol_rate / 8000; + fesettings->max_drift = 18 * fesettings->step_size; + } + + return 0; +} + +static void tda10086_release(struct dvb_frontend* fe) +{ + struct tda10086_state *state = fe->demodulator_priv; + tda10086_sleep(fe); + kfree(state); +} + +static const struct dvb_frontend_ops tda10086_ops = { + .delsys = { SYS_DVBS }, + .info = { + .name = "Philips TDA10086 DVB-S", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_stepsize_hz = 125 * kHz, + .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_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | + FE_CAN_QPSK + }, + + .release = tda10086_release, + + .init = tda10086_init, + .sleep = tda10086_sleep, + .i2c_gate_ctrl = tda10086_i2c_gate_ctrl, + + .set_frontend = tda10086_set_frontend, + .get_frontend = tda10086_get_frontend, + .get_tune_settings = tda10086_get_tune_settings, + + .read_status = tda10086_read_status, + .read_ber = tda10086_read_ber, + .read_signal_strength = tda10086_read_signal_strength, + .read_snr = tda10086_read_snr, + .read_ucblocks = tda10086_read_ucblocks, + + .diseqc_send_master_cmd = tda10086_send_master_cmd, + .diseqc_send_burst = tda10086_send_burst, + .set_tone = tda10086_set_tone, +}; + +struct dvb_frontend* tda10086_attach(const struct tda10086_config* config, + struct i2c_adapter* i2c) +{ + struct tda10086_state *state; + + dprintk ("%s\n", __func__); + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL); + if (!state) + return NULL; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + + /* check if the demod is there */ + if (tda10086_read_byte(state, 0x1e) != 0xe1) { + kfree(state); + return NULL; + } + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; +} + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator"); +MODULE_AUTHOR("Andrew de Quincey"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL_GPL(tda10086_attach); |