| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Realtek RTL2830 DVB-T demodulator driver |
| * |
| * Copyright (C) 2011 Antti Palosaari <crope@iki.fi> |
| */ |
| |
| #include "rtl2830_priv.h" |
| |
| /* Our regmap is bypassing I2C adapter lock, thus we do it! */ |
| static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg, |
| const void *val, size_t val_count) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| |
| i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| ret = regmap_bulk_write(dev->regmap, reg, val, val_count); |
| i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| return ret; |
| } |
| |
| static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg, |
| unsigned int mask, unsigned int val) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| |
| i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| ret = regmap_update_bits(dev->regmap, reg, mask, val); |
| i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| return ret; |
| } |
| |
| static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, |
| void *val, size_t val_count) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| |
| i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| ret = regmap_bulk_read(dev->regmap, reg, val, val_count); |
| i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
| return ret; |
| } |
| |
| static int rtl2830_init(struct dvb_frontend *fe) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; |
| int ret, i; |
| struct rtl2830_reg_val_mask tab[] = { |
| {0x00d, 0x01, 0x03}, |
| {0x00d, 0x10, 0x10}, |
| {0x104, 0x00, 0x1e}, |
| {0x105, 0x80, 0x80}, |
| {0x110, 0x02, 0x03}, |
| {0x110, 0x08, 0x0c}, |
| {0x17b, 0x00, 0x40}, |
| {0x17d, 0x05, 0x0f}, |
| {0x17d, 0x50, 0xf0}, |
| {0x18c, 0x08, 0x0f}, |
| {0x18d, 0x00, 0xc0}, |
| {0x188, 0x05, 0x0f}, |
| {0x189, 0x00, 0xfc}, |
| {0x2d5, 0x02, 0x02}, |
| {0x2f1, 0x02, 0x06}, |
| {0x2f1, 0x20, 0xf8}, |
| {0x16d, 0x00, 0x01}, |
| {0x1a6, 0x00, 0x80}, |
| {0x106, dev->pdata->vtop, 0x3f}, |
| {0x107, dev->pdata->krf, 0x3f}, |
| {0x112, 0x28, 0xff}, |
| {0x103, dev->pdata->agc_targ_val, 0xff}, |
| {0x00a, 0x02, 0x07}, |
| {0x140, 0x0c, 0x3c}, |
| {0x140, 0x40, 0xc0}, |
| {0x15b, 0x05, 0x07}, |
| {0x15b, 0x28, 0x38}, |
| {0x15c, 0x05, 0x07}, |
| {0x15c, 0x28, 0x38}, |
| {0x115, dev->pdata->spec_inv, 0x01}, |
| {0x16f, 0x01, 0x07}, |
| {0x170, 0x18, 0x38}, |
| {0x172, 0x0f, 0x0f}, |
| {0x173, 0x08, 0x38}, |
| {0x175, 0x01, 0x07}, |
| {0x176, 0x00, 0xc0}, |
| }; |
| |
| for (i = 0; i < ARRAY_SIZE(tab); i++) { |
| ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask, |
| tab[i].val); |
| if (ret) |
| goto err; |
| } |
| |
| ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2); |
| if (ret) |
| goto err; |
| |
| ret = rtl2830_bulk_write(client, 0x195, |
| "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8); |
| if (ret) |
| goto err; |
| |
| /* TODO: spec init */ |
| |
| /* soft reset */ |
| ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04); |
| if (ret) |
| goto err; |
| |
| ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00); |
| if (ret) |
| goto err; |
| |
| /* init stats here in order signal app which stats are supported */ |
| c->strength.len = 1; |
| c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| c->cnr.len = 1; |
| c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| c->post_bit_error.len = 1; |
| c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| c->post_bit_count.len = 1; |
| c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| |
| dev->sleeping = false; |
| |
| return ret; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int rtl2830_sleep(struct dvb_frontend *fe) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| |
| dev->sleeping = true; |
| dev->fe_status = 0; |
| |
| return 0; |
| } |
| |
| static int rtl2830_get_tune_settings(struct dvb_frontend *fe, |
| struct dvb_frontend_tune_settings *s) |
| { |
| s->min_delay_ms = 500; |
| s->step_size = fe->ops.info.frequency_stepsize_hz * 2; |
| s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1; |
| |
| return 0; |
| } |
| |
| static int rtl2830_set_frontend(struct dvb_frontend *fe) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int ret, i; |
| u64 num; |
| u8 buf[3], u8tmp; |
| u32 if_ctl, if_frequency; |
| static const u8 bw_params1[3][34] = { |
| { |
| 0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41, |
| 0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a, |
| 0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82, |
| 0x03, 0x73, 0x03, 0xcf, /* 6 MHz */ |
| }, { |
| 0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca, |
| 0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca, |
| 0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e, |
| 0x03, 0xd0, 0x04, 0x53, /* 7 MHz */ |
| }, { |
| 0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0, |
| 0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a, |
| 0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f, |
| 0x04, 0x24, 0x04, 0xdb, /* 8 MHz */ |
| }, |
| }; |
| static const u8 bw_params2[3][6] = { |
| {0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */ |
| {0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */ |
| {0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */ |
| }; |
| |
| dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n", |
| c->frequency, c->bandwidth_hz, c->inversion); |
| |
| /* program tuner */ |
| if (fe->ops.tuner_ops.set_params) |
| fe->ops.tuner_ops.set_params(fe); |
| |
| switch (c->bandwidth_hz) { |
| case 6000000: |
| i = 0; |
| break; |
| case 7000000: |
| i = 1; |
| break; |
| case 8000000: |
| i = 2; |
| break; |
| default: |
| dev_err(&client->dev, "invalid bandwidth_hz %u\n", |
| c->bandwidth_hz); |
| return -EINVAL; |
| } |
| |
| ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1); |
| if (ret) |
| goto err; |
| |
| /* program if frequency */ |
| if (fe->ops.tuner_ops.get_if_frequency) |
| ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); |
| else |
| ret = -EINVAL; |
| if (ret) |
| goto err; |
| |
| num = if_frequency % dev->pdata->clk; |
| num *= 0x400000; |
| num = div_u64(num, dev->pdata->clk); |
| num = -num; |
| if_ctl = num & 0x3fffff; |
| dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n", |
| if_frequency, if_ctl); |
| |
| buf[0] = (if_ctl >> 16) & 0x3f; |
| buf[1] = (if_ctl >> 8) & 0xff; |
| buf[2] = (if_ctl >> 0) & 0xff; |
| |
| ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1); |
| if (ret) |
| goto err; |
| |
| buf[0] |= u8tmp & 0xc0; /* [7:6] */ |
| |
| ret = rtl2830_bulk_write(client, 0x119, buf, 3); |
| if (ret) |
| goto err; |
| |
| /* 1/2 split I2C write */ |
| ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17); |
| if (ret) |
| goto err; |
| |
| /* 2/2 split I2C write */ |
| ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17); |
| if (ret) |
| goto err; |
| |
| ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6); |
| if (ret) |
| goto err; |
| |
| return ret; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int rtl2830_get_frontend(struct dvb_frontend *fe, |
| struct dtv_frontend_properties *c) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| u8 buf[3]; |
| |
| if (dev->sleeping) |
| return 0; |
| |
| ret = rtl2830_bulk_read(client, 0x33c, buf, 2); |
| if (ret) |
| goto err; |
| |
| ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1); |
| if (ret) |
| goto err; |
| |
| dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf); |
| |
| switch ((buf[0] >> 2) & 3) { |
| case 0: |
| c->modulation = QPSK; |
| break; |
| case 1: |
| c->modulation = QAM_16; |
| break; |
| case 2: |
| c->modulation = QAM_64; |
| break; |
| } |
| |
| switch ((buf[2] >> 2) & 1) { |
| case 0: |
| c->transmission_mode = TRANSMISSION_MODE_2K; |
| break; |
| case 1: |
| c->transmission_mode = TRANSMISSION_MODE_8K; |
| } |
| |
| switch ((buf[2] >> 0) & 3) { |
| case 0: |
| c->guard_interval = GUARD_INTERVAL_1_32; |
| break; |
| case 1: |
| c->guard_interval = GUARD_INTERVAL_1_16; |
| break; |
| case 2: |
| c->guard_interval = GUARD_INTERVAL_1_8; |
| break; |
| case 3: |
| c->guard_interval = GUARD_INTERVAL_1_4; |
| break; |
| } |
| |
| switch ((buf[0] >> 4) & 7) { |
| case 0: |
| c->hierarchy = HIERARCHY_NONE; |
| break; |
| case 1: |
| c->hierarchy = HIERARCHY_1; |
| break; |
| case 2: |
| c->hierarchy = HIERARCHY_2; |
| break; |
| case 3: |
| c->hierarchy = HIERARCHY_4; |
| break; |
| } |
| |
| switch ((buf[1] >> 3) & 7) { |
| case 0: |
| c->code_rate_HP = FEC_1_2; |
| break; |
| case 1: |
| c->code_rate_HP = FEC_2_3; |
| break; |
| case 2: |
| c->code_rate_HP = FEC_3_4; |
| break; |
| case 3: |
| c->code_rate_HP = FEC_5_6; |
| break; |
| case 4: |
| c->code_rate_HP = FEC_7_8; |
| break; |
| } |
| |
| switch ((buf[1] >> 0) & 7) { |
| case 0: |
| c->code_rate_LP = FEC_1_2; |
| break; |
| case 1: |
| c->code_rate_LP = FEC_2_3; |
| break; |
| case 2: |
| c->code_rate_LP = FEC_3_4; |
| break; |
| case 3: |
| c->code_rate_LP = FEC_5_6; |
| break; |
| case 4: |
| c->code_rate_LP = FEC_7_8; |
| break; |
| } |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int rtl2830_read_status(struct dvb_frontend *fe, enum fe_status *status) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; |
| int ret, stmp; |
| unsigned int utmp; |
| u8 u8tmp, buf[2]; |
| |
| *status = 0; |
| |
| if (dev->sleeping) |
| return 0; |
| |
| ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1); |
| if (ret) |
| goto err; |
| |
| u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */ |
| if (u8tmp == 11) { |
| *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
| FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
| } else if (u8tmp == 10) { |
| *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
| FE_HAS_VITERBI; |
| } |
| |
| dev->fe_status = *status; |
| |
| /* Signal strength */ |
| if (dev->fe_status & FE_HAS_SIGNAL) { |
| /* Read IF AGC */ |
| ret = rtl2830_bulk_read(client, 0x359, buf, 2); |
| if (ret) |
| goto err; |
| |
| stmp = buf[0] << 8 | buf[1] << 0; |
| stmp = sign_extend32(stmp, 13); |
| utmp = clamp_val(-4 * stmp + 32767, 0x0000, 0xffff); |
| |
| dev_dbg(&client->dev, "IF AGC=%d\n", stmp); |
| |
| c->strength.stat[0].scale = FE_SCALE_RELATIVE; |
| c->strength.stat[0].uvalue = utmp; |
| } else { |
| c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| } |
| |
| /* CNR */ |
| if (dev->fe_status & FE_HAS_VITERBI) { |
| unsigned int hierarchy, constellation; |
| #define CONSTELLATION_NUM 3 |
| #define HIERARCHY_NUM 4 |
| static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { |
| {70705899, 70705899, 70705899, 70705899}, |
| {82433173, 82433173, 87483115, 94445660}, |
| {92888734, 92888734, 95487525, 99770748}, |
| }; |
| |
| ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1); |
| if (ret) |
| goto err; |
| |
| constellation = (u8tmp >> 2) & 0x03; /* [3:2] */ |
| if (constellation > CONSTELLATION_NUM - 1) |
| goto err; |
| |
| hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */ |
| if (hierarchy > HIERARCHY_NUM - 1) |
| goto err; |
| |
| ret = rtl2830_bulk_read(client, 0x40c, buf, 2); |
| if (ret) |
| goto err; |
| |
| utmp = buf[0] << 8 | buf[1] << 0; |
| if (utmp) |
| stmp = (constant[constellation][hierarchy] - |
| intlog10(utmp)) / ((1 << 24) / 10000); |
| else |
| stmp = 0; |
| |
| dev_dbg(&client->dev, "CNR raw=%u\n", utmp); |
| |
| c->cnr.stat[0].scale = FE_SCALE_DECIBEL; |
| c->cnr.stat[0].svalue = stmp; |
| } else { |
| c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| } |
| |
| /* BER */ |
| if (dev->fe_status & FE_HAS_LOCK) { |
| ret = rtl2830_bulk_read(client, 0x34e, buf, 2); |
| if (ret) |
| goto err; |
| |
| utmp = buf[0] << 8 | buf[1] << 0; |
| dev->post_bit_error += utmp; |
| dev->post_bit_count += 1000000; |
| |
| dev_dbg(&client->dev, "BER errors=%u total=1000000\n", utmp); |
| |
| c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; |
| c->post_bit_error.stat[0].uvalue = dev->post_bit_error; |
| c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; |
| c->post_bit_count.stat[0].uvalue = dev->post_bit_count; |
| } else { |
| c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
| } |
| |
| |
| return ret; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr) |
| { |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| |
| if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) |
| *snr = div_s64(c->cnr.stat[0].svalue, 100); |
| else |
| *snr = 0; |
| |
| return 0; |
| } |
| |
| static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| |
| *ber = (dev->post_bit_error - dev->post_bit_error_prev); |
| dev->post_bit_error_prev = dev->post_bit_error; |
| |
| return 0; |
| } |
| |
| static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
| { |
| *ucblocks = 0; |
| |
| return 0; |
| } |
| |
| static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength) |
| { |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| |
| if (c->strength.stat[0].scale == FE_SCALE_RELATIVE) |
| *strength = c->strength.stat[0].uvalue; |
| else |
| *strength = 0; |
| |
| return 0; |
| } |
| |
| static const struct dvb_frontend_ops rtl2830_ops = { |
| .delsys = {SYS_DVBT}, |
| .info = { |
| .name = "Realtek RTL2830 (DVB-T)", |
| .caps = FE_CAN_FEC_1_2 | |
| FE_CAN_FEC_2_3 | |
| FE_CAN_FEC_3_4 | |
| FE_CAN_FEC_5_6 | |
| FE_CAN_FEC_7_8 | |
| FE_CAN_FEC_AUTO | |
| FE_CAN_QPSK | |
| FE_CAN_QAM_16 | |
| FE_CAN_QAM_64 | |
| FE_CAN_QAM_AUTO | |
| FE_CAN_TRANSMISSION_MODE_AUTO | |
| FE_CAN_GUARD_INTERVAL_AUTO | |
| FE_CAN_HIERARCHY_AUTO | |
| FE_CAN_RECOVER | |
| FE_CAN_MUTE_TS |
| }, |
| |
| .init = rtl2830_init, |
| .sleep = rtl2830_sleep, |
| |
| .get_tune_settings = rtl2830_get_tune_settings, |
| |
| .set_frontend = rtl2830_set_frontend, |
| .get_frontend = rtl2830_get_frontend, |
| |
| .read_status = rtl2830_read_status, |
| .read_snr = rtl2830_read_snr, |
| .read_ber = rtl2830_read_ber, |
| .read_ucblocks = rtl2830_read_ucblocks, |
| .read_signal_strength = rtl2830_read_signal_strength, |
| }; |
| |
| static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| int ret; |
| u8 u8tmp; |
| |
| dev_dbg(&client->dev, "onoff=%d\n", onoff); |
| |
| /* enable / disable PID filter */ |
| if (onoff) |
| u8tmp = 0x80; |
| else |
| u8tmp = 0x00; |
| |
| ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff) |
| { |
| struct i2c_client *client = fe->demodulator_priv; |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| u8 buf[4]; |
| |
| dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n", |
| index, pid, onoff); |
| |
| /* skip invalid PIDs (0x2000) */ |
| if (pid > 0x1fff || index > 32) |
| return 0; |
| |
| if (onoff) |
| set_bit(index, &dev->filters); |
| else |
| clear_bit(index, &dev->filters); |
| |
| /* enable / disable PIDs */ |
| buf[0] = (dev->filters >> 0) & 0xff; |
| buf[1] = (dev->filters >> 8) & 0xff; |
| buf[2] = (dev->filters >> 16) & 0xff; |
| buf[3] = (dev->filters >> 24) & 0xff; |
| ret = rtl2830_bulk_write(client, 0x062, buf, 4); |
| if (ret) |
| goto err; |
| |
| /* add PID */ |
| buf[0] = (pid >> 8) & 0xff; |
| buf[1] = (pid >> 0) & 0xff; |
| ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| /* |
| * I2C gate/mux/repeater logic |
| * We must use unlocked __i2c_transfer() here (through regmap) because of I2C |
| * adapter lock is already taken by tuner driver. |
| * Gate is closed automatically after single I2C transfer. |
| */ |
| static int rtl2830_select(struct i2c_mux_core *muxc, u32 chan_id) |
| { |
| struct i2c_client *client = i2c_mux_priv(muxc); |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| int ret; |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| /* open I2C repeater for 1 transfer, closes automatically */ |
| /* XXX: regmap_update_bits() does not lock I2C adapter */ |
| ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08); |
| if (ret) |
| goto err; |
| |
| return 0; |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| return &dev->fe; |
| } |
| |
| static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| return dev->muxc->adapter[0]; |
| } |
| |
| /* |
| * We implement own I2C access routines for regmap in order to get manual access |
| * to I2C adapter lock, which is needed for I2C mux adapter. |
| */ |
| static int rtl2830_regmap_read(void *context, const void *reg_buf, |
| size_t reg_size, void *val_buf, size_t val_size) |
| { |
| struct i2c_client *client = context; |
| int ret; |
| struct i2c_msg msg[2] = { |
| { |
| .addr = client->addr, |
| .flags = 0, |
| .len = reg_size, |
| .buf = (u8 *)reg_buf, |
| }, { |
| .addr = client->addr, |
| .flags = I2C_M_RD, |
| .len = val_size, |
| .buf = val_buf, |
| } |
| }; |
| |
| ret = __i2c_transfer(client->adapter, msg, 2); |
| if (ret != 2) { |
| dev_warn(&client->dev, "i2c reg read failed %d\n", ret); |
| if (ret >= 0) |
| ret = -EREMOTEIO; |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int rtl2830_regmap_write(void *context, const void *data, size_t count) |
| { |
| struct i2c_client *client = context; |
| int ret; |
| struct i2c_msg msg[1] = { |
| { |
| .addr = client->addr, |
| .flags = 0, |
| .len = count, |
| .buf = (u8 *)data, |
| } |
| }; |
| |
| ret = __i2c_transfer(client->adapter, msg, 1); |
| if (ret != 1) { |
| dev_warn(&client->dev, "i2c reg write failed %d\n", ret); |
| if (ret >= 0) |
| ret = -EREMOTEIO; |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int rtl2830_regmap_gather_write(void *context, const void *reg, |
| size_t reg_len, const void *val, |
| size_t val_len) |
| { |
| struct i2c_client *client = context; |
| int ret; |
| u8 buf[256]; |
| struct i2c_msg msg[1] = { |
| { |
| .addr = client->addr, |
| .flags = 0, |
| .len = 1 + val_len, |
| .buf = buf, |
| } |
| }; |
| |
| buf[0] = *(u8 const *)reg; |
| memcpy(&buf[1], val, val_len); |
| |
| ret = __i2c_transfer(client->adapter, msg, 1); |
| if (ret != 1) { |
| dev_warn(&client->dev, "i2c reg write failed %d\n", ret); |
| if (ret >= 0) |
| ret = -EREMOTEIO; |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int rtl2830_probe(struct i2c_client *client) |
| { |
| struct rtl2830_platform_data *pdata = client->dev.platform_data; |
| struct rtl2830_dev *dev; |
| int ret; |
| u8 u8tmp; |
| static const struct regmap_bus regmap_bus = { |
| .read = rtl2830_regmap_read, |
| .write = rtl2830_regmap_write, |
| .gather_write = rtl2830_regmap_gather_write, |
| .val_format_endian_default = REGMAP_ENDIAN_NATIVE, |
| }; |
| static const struct regmap_range_cfg regmap_range_cfg[] = { |
| { |
| .selector_reg = 0x00, |
| .selector_mask = 0xff, |
| .selector_shift = 0, |
| .window_start = 0, |
| .window_len = 0x100, |
| .range_min = 0 * 0x100, |
| .range_max = 5 * 0x100, |
| }, |
| }; |
| static const struct regmap_config regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = 5 * 0x100, |
| .ranges = regmap_range_cfg, |
| .num_ranges = ARRAY_SIZE(regmap_range_cfg), |
| }; |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| if (pdata == NULL) { |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| /* allocate memory for the internal state */ |
| dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| if (dev == NULL) { |
| ret = -ENOMEM; |
| goto err; |
| } |
| |
| /* setup the state */ |
| i2c_set_clientdata(client, dev); |
| dev->client = client; |
| dev->pdata = client->dev.platform_data; |
| dev->sleeping = true; |
| dev->regmap = regmap_init(&client->dev, ®map_bus, client, |
| ®map_config); |
| if (IS_ERR(dev->regmap)) { |
| ret = PTR_ERR(dev->regmap); |
| goto err_kfree; |
| } |
| |
| /* check if the demod is there */ |
| ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1); |
| if (ret) |
| goto err_regmap_exit; |
| |
| /* create muxed i2c adapter for tuner */ |
| dev->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, 0, |
| rtl2830_select, NULL); |
| if (!dev->muxc) { |
| ret = -ENOMEM; |
| goto err_regmap_exit; |
| } |
| dev->muxc->priv = client; |
| ret = i2c_mux_add_adapter(dev->muxc, 0, 0); |
| if (ret) |
| goto err_regmap_exit; |
| |
| /* create dvb frontend */ |
| memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops)); |
| dev->fe.demodulator_priv = client; |
| |
| /* setup callbacks */ |
| pdata->get_dvb_frontend = rtl2830_get_dvb_frontend; |
| pdata->get_i2c_adapter = rtl2830_get_i2c_adapter; |
| pdata->pid_filter = rtl2830_pid_filter; |
| pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl; |
| |
| dev_info(&client->dev, "Realtek RTL2830 successfully attached\n"); |
| |
| return 0; |
| err_regmap_exit: |
| regmap_exit(dev->regmap); |
| err_kfree: |
| kfree(dev); |
| err: |
| dev_dbg(&client->dev, "failed=%d\n", ret); |
| return ret; |
| } |
| |
| static void rtl2830_remove(struct i2c_client *client) |
| { |
| struct rtl2830_dev *dev = i2c_get_clientdata(client); |
| |
| dev_dbg(&client->dev, "\n"); |
| |
| i2c_mux_del_adapters(dev->muxc); |
| regmap_exit(dev->regmap); |
| kfree(dev); |
| } |
| |
| static const struct i2c_device_id rtl2830_id_table[] = { |
| {"rtl2830", 0}, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(i2c, rtl2830_id_table); |
| |
| static struct i2c_driver rtl2830_driver = { |
| .driver = { |
| .name = "rtl2830", |
| .suppress_bind_attrs = true, |
| }, |
| .probe = rtl2830_probe, |
| .remove = rtl2830_remove, |
| .id_table = rtl2830_id_table, |
| }; |
| |
| module_i2c_driver(rtl2830_driver); |
| |
| MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver"); |
| MODULE_LICENSE("GPL"); |