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- // 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,
- const struct i2c_device_id *id)
- {
- 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, 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 int 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);
- return 0;
- }
- 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");
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