diff options
Diffstat (limited to 'drivers/media/dvb-frontends/stv6111.c')
| -rw-r--r-- | drivers/media/dvb-frontends/stv6111.c | 690 |
1 files changed, 690 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/stv6111.c b/drivers/media/dvb-frontends/stv6111.c new file mode 100644 index 000000000..d5035dac4 --- /dev/null +++ b/drivers/media/dvb-frontends/stv6111.c @@ -0,0 +1,690 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for the ST STV6111 tuner + * + * Copyright (C) 2014 Digital Devices GmbH + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 only, as published by the Free Software Foundation. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/firmware.h> +#include <linux/i2c.h> +#include <asm/div64.h> + +#include "stv6111.h" + +#include <media/dvb_frontend.h> + +struct stv { + struct i2c_adapter *i2c; + u8 adr; + + u8 reg[11]; + u32 ref_freq; + u32 frequency; +}; + +struct slookup { + s16 value; + u16 reg_value; +}; + +static const struct slookup lnagain_nf_lookup[] = { + /* Gain *100dB // Reg */ + { 2572, 0 }, + { 2575, 1 }, + { 2580, 2 }, + { 2588, 3 }, + { 2596, 4 }, + { 2611, 5 }, + { 2633, 6 }, + { 2664, 7 }, + { 2701, 8 }, + { 2753, 9 }, + { 2816, 10 }, + { 2902, 11 }, + { 2995, 12 }, + { 3104, 13 }, + { 3215, 14 }, + { 3337, 15 }, + { 3492, 16 }, + { 3614, 17 }, + { 3731, 18 }, + { 3861, 19 }, + { 3988, 20 }, + { 4124, 21 }, + { 4253, 22 }, + { 4386, 23 }, + { 4505, 24 }, + { 4623, 25 }, + { 4726, 26 }, + { 4821, 27 }, + { 4903, 28 }, + { 4979, 29 }, + { 5045, 30 }, + { 5102, 31 } +}; + +static const struct slookup lnagain_iip3_lookup[] = { + /* Gain *100dB // reg */ + { 1548, 0 }, + { 1552, 1 }, + { 1569, 2 }, + { 1565, 3 }, + { 1577, 4 }, + { 1594, 5 }, + { 1627, 6 }, + { 1656, 7 }, + { 1700, 8 }, + { 1748, 9 }, + { 1805, 10 }, + { 1896, 11 }, + { 1995, 12 }, + { 2113, 13 }, + { 2233, 14 }, + { 2366, 15 }, + { 2543, 16 }, + { 2687, 17 }, + { 2842, 18 }, + { 2999, 19 }, + { 3167, 20 }, + { 3342, 21 }, + { 3507, 22 }, + { 3679, 23 }, + { 3827, 24 }, + { 3970, 25 }, + { 4094, 26 }, + { 4210, 27 }, + { 4308, 28 }, + { 4396, 29 }, + { 4468, 30 }, + { 4535, 31 } +}; + +static const struct slookup gain_rfagc_lookup[] = { + /* Gain *100dB // reg */ + { 4870, 0x3000 }, + { 4850, 0x3C00 }, + { 4800, 0x4500 }, + { 4750, 0x4800 }, + { 4700, 0x4B00 }, + { 4650, 0x4D00 }, + { 4600, 0x4F00 }, + { 4550, 0x5100 }, + { 4500, 0x5200 }, + { 4420, 0x5500 }, + { 4316, 0x5800 }, + { 4200, 0x5B00 }, + { 4119, 0x5D00 }, + { 3999, 0x6000 }, + { 3950, 0x6100 }, + { 3876, 0x6300 }, + { 3755, 0x6600 }, + { 3641, 0x6900 }, + { 3567, 0x6B00 }, + { 3425, 0x6F00 }, + { 3350, 0x7100 }, + { 3236, 0x7400 }, + { 3118, 0x7700 }, + { 3004, 0x7A00 }, + { 2917, 0x7C00 }, + { 2776, 0x7F00 }, + { 2635, 0x8200 }, + { 2516, 0x8500 }, + { 2406, 0x8800 }, + { 2290, 0x8B00 }, + { 2170, 0x8E00 }, + { 2073, 0x9100 }, + { 1949, 0x9400 }, + { 1836, 0x9700 }, + { 1712, 0x9A00 }, + { 1631, 0x9C00 }, + { 1515, 0x9F00 }, + { 1400, 0xA200 }, + { 1323, 0xA400 }, + { 1203, 0xA700 }, + { 1091, 0xAA00 }, + { 1011, 0xAC00 }, + { 904, 0xAF00 }, + { 787, 0xB200 }, + { 685, 0xB500 }, + { 571, 0xB800 }, + { 464, 0xBB00 }, + { 374, 0xBE00 }, + { 275, 0xC200 }, + { 181, 0xC600 }, + { 102, 0xCC00 }, + { 49, 0xD900 } +}; + +/* + * This table is 6 dB too low comapred to the others (probably created with + * a different BB_MAG setting) + */ +static const struct slookup gain_channel_agc_nf_lookup[] = { + /* Gain *100dB // reg */ + { 7082, 0x3000 }, + { 7052, 0x4000 }, + { 7007, 0x4600 }, + { 6954, 0x4A00 }, + { 6909, 0x4D00 }, + { 6833, 0x5100 }, + { 6753, 0x5400 }, + { 6659, 0x5700 }, + { 6561, 0x5A00 }, + { 6472, 0x5C00 }, + { 6366, 0x5F00 }, + { 6259, 0x6100 }, + { 6151, 0x6400 }, + { 6026, 0x6700 }, + { 5920, 0x6900 }, + { 5835, 0x6B00 }, + { 5770, 0x6C00 }, + { 5681, 0x6E00 }, + { 5596, 0x7000 }, + { 5503, 0x7200 }, + { 5429, 0x7300 }, + { 5319, 0x7500 }, + { 5220, 0x7700 }, + { 5111, 0x7900 }, + { 4983, 0x7B00 }, + { 4876, 0x7D00 }, + { 4755, 0x7F00 }, + { 4635, 0x8100 }, + { 4499, 0x8300 }, + { 4405, 0x8500 }, + { 4323, 0x8600 }, + { 4233, 0x8800 }, + { 4156, 0x8A00 }, + { 4038, 0x8C00 }, + { 3935, 0x8E00 }, + { 3823, 0x9000 }, + { 3712, 0x9200 }, + { 3601, 0x9500 }, + { 3511, 0x9700 }, + { 3413, 0x9900 }, + { 3309, 0x9B00 }, + { 3213, 0x9D00 }, + { 3088, 0x9F00 }, + { 2992, 0xA100 }, + { 2878, 0xA400 }, + { 2769, 0xA700 }, + { 2645, 0xAA00 }, + { 2538, 0xAD00 }, + { 2441, 0xB000 }, + { 2350, 0xB600 }, + { 2237, 0xBA00 }, + { 2137, 0xBF00 }, + { 2039, 0xC500 }, + { 1938, 0xDF00 }, + { 1927, 0xFF00 } +}; + +static const struct slookup gain_channel_agc_iip3_lookup[] = { + /* Gain *100dB // reg */ + { 7070, 0x3000 }, + { 7028, 0x4000 }, + { 7019, 0x4600 }, + { 6900, 0x4A00 }, + { 6811, 0x4D00 }, + { 6763, 0x5100 }, + { 6690, 0x5400 }, + { 6644, 0x5700 }, + { 6617, 0x5A00 }, + { 6598, 0x5C00 }, + { 6462, 0x5F00 }, + { 6348, 0x6100 }, + { 6197, 0x6400 }, + { 6154, 0x6700 }, + { 6098, 0x6900 }, + { 5893, 0x6B00 }, + { 5812, 0x6C00 }, + { 5773, 0x6E00 }, + { 5723, 0x7000 }, + { 5661, 0x7200 }, + { 5579, 0x7300 }, + { 5460, 0x7500 }, + { 5308, 0x7700 }, + { 5099, 0x7900 }, + { 4910, 0x7B00 }, + { 4800, 0x7D00 }, + { 4785, 0x7F00 }, + { 4635, 0x8100 }, + { 4466, 0x8300 }, + { 4314, 0x8500 }, + { 4295, 0x8600 }, + { 4144, 0x8800 }, + { 3920, 0x8A00 }, + { 3889, 0x8C00 }, + { 3771, 0x8E00 }, + { 3655, 0x9000 }, + { 3446, 0x9200 }, + { 3298, 0x9500 }, + { 3083, 0x9700 }, + { 3015, 0x9900 }, + { 2833, 0x9B00 }, + { 2746, 0x9D00 }, + { 2632, 0x9F00 }, + { 2598, 0xA100 }, + { 2480, 0xA400 }, + { 2236, 0xA700 }, + { 2171, 0xAA00 }, + { 2060, 0xAD00 }, + { 1999, 0xB000 }, + { 1974, 0xB600 }, + { 1820, 0xBA00 }, + { 1741, 0xBF00 }, + { 1655, 0xC500 }, + { 1444, 0xDF00 }, + { 1325, 0xFF00 }, +}; + +static inline u32 muldiv32(u32 a, u32 b, u32 c) +{ + u64 tmp64; + + tmp64 = (u64)a * (u64)b; + do_div(tmp64, c); + + return (u32)tmp64; +} + +static int i2c_read(struct i2c_adapter *adap, + u8 adr, u8 *msg, int len, u8 *answ, int alen) +{ + struct i2c_msg msgs[2] = { { .addr = adr, .flags = 0, + .buf = msg, .len = len}, + { .addr = adr, .flags = I2C_M_RD, + .buf = answ, .len = alen } }; + if (i2c_transfer(adap, msgs, 2) != 2) { + dev_err(&adap->dev, "i2c read error\n"); + return -EIO; + } + return 0; +} + +static int i2c_write(struct i2c_adapter *adap, u8 adr, u8 *data, int len) +{ + struct i2c_msg msg = {.addr = adr, .flags = 0, + .buf = data, .len = len}; + + if (i2c_transfer(adap, &msg, 1) != 1) { + dev_err(&adap->dev, "i2c write error\n"); + return -EIO; + } + return 0; +} + +static int write_regs(struct stv *state, int reg, int len) +{ + u8 d[12]; + + memcpy(&d[1], &state->reg[reg], len); + d[0] = reg; + return i2c_write(state->i2c, state->adr, d, len + 1); +} + +static int write_reg(struct stv *state, u8 reg, u8 val) +{ + u8 d[2] = {reg, val}; + + return i2c_write(state->i2c, state->adr, d, 2); +} + +static int read_reg(struct stv *state, u8 reg, u8 *val) +{ + return i2c_read(state->i2c, state->adr, ®, 1, val, 1); +} + +static int wait_for_call_done(struct stv *state, u8 mask) +{ + int status = 0; + u32 lock_retry_count = 10; + + while (lock_retry_count > 0) { + u8 regval; + + status = read_reg(state, 9, ®val); + if (status < 0) + return status; + + if ((regval & mask) == 0) + break; + usleep_range(4000, 6000); + lock_retry_count -= 1; + + status = -EIO; + } + return status; +} + +static void init_state(struct stv *state) +{ + u32 clkdiv = 0; + u32 agcmode = 0; + u32 agcref = 2; + u32 agcset = 0xffffffff; + u32 bbmode = 0xffffffff; + + state->reg[0] = 0x08; + state->reg[1] = 0x41; + state->reg[2] = 0x8f; + state->reg[3] = 0x00; + state->reg[4] = 0xce; + state->reg[5] = 0x54; + state->reg[6] = 0x55; + state->reg[7] = 0x45; + state->reg[8] = 0x46; + state->reg[9] = 0xbd; + state->reg[10] = 0x11; + + state->ref_freq = 16000; + + if (clkdiv <= 3) + state->reg[0x00] |= (clkdiv & 0x03); + if (agcmode <= 3) { + state->reg[0x03] |= (agcmode << 5); + if (agcmode == 0x01) + state->reg[0x01] |= 0x30; + } + if (bbmode <= 3) + state->reg[0x01] = (state->reg[0x01] & ~0x30) | (bbmode << 4); + if (agcref <= 7) + state->reg[0x03] |= agcref; + if (agcset <= 31) + state->reg[0x02] = (state->reg[0x02] & ~0x1F) | agcset | 0x40; +} + +static int attach_init(struct stv *state) +{ + if (write_regs(state, 0, 11)) + return -ENODEV; + return 0; +} + +static void release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; +} + +static int set_bandwidth(struct dvb_frontend *fe, u32 cutoff_frequency) +{ + struct stv *state = fe->tuner_priv; + u32 index = (cutoff_frequency + 999999) / 1000000; + int stat = 0; + + if (index < 6) + index = 6; + if (index > 50) + index = 50; + if ((state->reg[0x08] & ~0xFC) == ((index - 6) << 2)) + return 0; + + state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2); + state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x08; + if (fe->ops.i2c_gate_ctrl) + stat = fe->ops.i2c_gate_ctrl(fe, 1); + if (!stat) { + write_regs(state, 0x08, 2); + wait_for_call_done(state, 0x08); + } + if (fe->ops.i2c_gate_ctrl && !stat) + fe->ops.i2c_gate_ctrl(fe, 0); + return stat; +} + +static int set_lof(struct stv *state, u32 local_frequency, u32 cutoff_frequency) +{ + u32 index = (cutoff_frequency + 999999) / 1000000; + u32 frequency = (local_frequency + 500) / 1000; + u32 p = 1, psel = 0, fvco, div, frac; + u8 icp, tmp; + + if (index < 6) + index = 6; + if (index > 50) + index = 50; + + if (frequency <= 1300000) { + p = 4; + psel = 1; + } else { + p = 2; + psel = 0; + } + fvco = frequency * p; + div = fvco / state->ref_freq; + frac = fvco % state->ref_freq; + frac = muldiv32(frac, 0x40000, state->ref_freq); + + icp = 0; + if (fvco < 2700000) + icp = 0; + else if (fvco < 2950000) + icp = 1; + else if (fvco < 3300000) + icp = 2; + else if (fvco < 3700000) + icp = 3; + else if (fvco < 4200000) + icp = 5; + else if (fvco < 4800000) + icp = 6; + else + icp = 7; + + state->reg[0x02] |= 0x80; /* LNA IIP3 Mode */ + + state->reg[0x03] = (state->reg[0x03] & ~0x80) | (psel << 7); + state->reg[0x04] = (div & 0xFF); + state->reg[0x05] = (((div >> 8) & 0x01) | ((frac & 0x7F) << 1)) & 0xff; + state->reg[0x06] = ((frac >> 7) & 0xFF); + state->reg[0x07] = (state->reg[0x07] & ~0x07) | ((frac >> 15) & 0x07); + state->reg[0x07] = (state->reg[0x07] & ~0xE0) | (icp << 5); + + state->reg[0x08] = (state->reg[0x08] & ~0xFC) | ((index - 6) << 2); + /* Start cal vco,CF */ + state->reg[0x09] = (state->reg[0x09] & ~0x0C) | 0x0C; + write_regs(state, 2, 8); + + wait_for_call_done(state, 0x0C); + + usleep_range(10000, 12000); + + read_reg(state, 0x03, &tmp); + if (tmp & 0x10) { + state->reg[0x02] &= ~0x80; /* LNA NF Mode */ + write_regs(state, 2, 1); + } + read_reg(state, 0x08, &tmp); + + state->frequency = frequency; + + return 0; +} + +static int set_params(struct dvb_frontend *fe) +{ + struct stv *state = fe->tuner_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + u32 freq, cutoff; + int stat = 0; + + if (p->delivery_system != SYS_DVBS && p->delivery_system != SYS_DVBS2) + return -EINVAL; + + freq = p->frequency * 1000; + cutoff = 5000000 + muldiv32(p->symbol_rate, 135, 200); + + if (fe->ops.i2c_gate_ctrl) + stat = fe->ops.i2c_gate_ctrl(fe, 1); + if (!stat) + set_lof(state, freq, cutoff); + if (fe->ops.i2c_gate_ctrl && !stat) + fe->ops.i2c_gate_ctrl(fe, 0); + return 0; +} + +static s32 table_lookup(const struct slookup *table, + int table_size, u16 reg_value) +{ + s32 gain; + s32 reg_diff; + int imin = 0; + int imax = table_size - 1; + int i; + + /* Assumes Table[0].RegValue < Table[imax].RegValue */ + if (reg_value <= table[0].reg_value) { + gain = table[0].value; + } else if (reg_value >= table[imax].reg_value) { + gain = table[imax].value; + } else { + while ((imax - imin) > 1) { + i = (imax + imin) / 2; + if ((table[imin].reg_value <= reg_value) && + (reg_value <= table[i].reg_value)) + imax = i; + else + imin = i; + } + reg_diff = table[imax].reg_value - table[imin].reg_value; + gain = table[imin].value; + if (reg_diff != 0) + gain += ((s32)(reg_value - table[imin].reg_value) * + (s32)(table[imax].value + - table[imin].value)) / reg_diff; + } + return gain; +} + +static int get_rf_strength(struct dvb_frontend *fe, u16 *st) +{ + struct stv *state = fe->tuner_priv; + u16 rfagc = *st; + s32 gain; + + if ((state->reg[0x03] & 0x60) == 0) { + /* RF Mode, Read AGC ADC */ + u8 reg = 0; + int stat = 0; + + if (fe->ops.i2c_gate_ctrl) + stat = fe->ops.i2c_gate_ctrl(fe, 1); + if (!stat) { + write_reg(state, 0x02, state->reg[0x02] | 0x20); + read_reg(state, 2, ®); + if (reg & 0x20) + read_reg(state, 2, ®); + } + if (fe->ops.i2c_gate_ctrl && !stat) + fe->ops.i2c_gate_ctrl(fe, 0); + + if ((state->reg[0x02] & 0x80) == 0) + /* NF */ + gain = table_lookup(lnagain_nf_lookup, + ARRAY_SIZE(lnagain_nf_lookup), + reg & 0x1F); + else + /* IIP3 */ + gain = table_lookup(lnagain_iip3_lookup, + ARRAY_SIZE(lnagain_iip3_lookup), + reg & 0x1F); + + gain += table_lookup(gain_rfagc_lookup, + ARRAY_SIZE(gain_rfagc_lookup), rfagc); + + gain -= 2400; + } else { + /* Channel Mode */ + if ((state->reg[0x02] & 0x80) == 0) { + /* NF */ + gain = table_lookup( + gain_channel_agc_nf_lookup, + ARRAY_SIZE(gain_channel_agc_nf_lookup), rfagc); + + gain += 600; + } else { + /* IIP3 */ + gain = table_lookup( + gain_channel_agc_iip3_lookup, + ARRAY_SIZE(gain_channel_agc_iip3_lookup), + rfagc); + } + } + + if (state->frequency > 0) + /* Tilt correction ( 0.00016 dB/MHz ) */ + gain -= ((((s32)(state->frequency / 1000) - 1550) * 2) / 12); + + /* + (BBGain * 10); */ + gain += (s32)((state->reg[0x01] & 0xC0) >> 6) * 600 - 1300; + + if (gain < 0) + gain = 0; + else if (gain > 10000) + gain = 10000; + + *st = 10000 - gain; + + return 0; +} + +static const struct dvb_tuner_ops tuner_ops = { + .info = { + .name = "ST STV6111", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + }, + .set_params = set_params, + .release = release, + .get_rf_strength = get_rf_strength, + .set_bandwidth = set_bandwidth, +}; + +struct dvb_frontend *stv6111_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, u8 adr) +{ + struct stv *state; + int stat = -ENODEV; + int gatestat = 0; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + state->adr = adr; + state->i2c = i2c; + memcpy(&fe->ops.tuner_ops, &tuner_ops, sizeof(struct dvb_tuner_ops)); + init_state(state); + + if (fe->ops.i2c_gate_ctrl) + gatestat = fe->ops.i2c_gate_ctrl(fe, 1); + if (!gatestat) + stat = attach_init(state); + if (fe->ops.i2c_gate_ctrl && !gatestat) + fe->ops.i2c_gate_ctrl(fe, 0); + if (stat < 0) { + kfree(state); + return NULL; + } + fe->tuner_priv = state; + return fe; +} +EXPORT_SYMBOL_GPL(stv6111_attach); + +MODULE_DESCRIPTION("ST STV6111 satellite tuner driver"); +MODULE_AUTHOR("Ralph Metzler, Manfred Voelkel"); +MODULE_LICENSE("GPL v2"); |