| // 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"); |
