// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Panasonic MN88473 DVB-T/T2/C demodulator driver
 *
 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
 */

#include "mn88473_priv.h"

static int mn88473_get_tune_settings(struct dvb_frontend *fe,
                                     struct dvb_frontend_tune_settings *s)
{
        s->min_delay_ms = 1000;
        return 0;
}

static int mn88473_set_frontend(struct dvb_frontend *fe)
{
        struct i2c_client *client = fe->demodulator_priv;
        struct mn88473_dev *dev = i2c_get_clientdata(client);
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        int ret, i;
        unsigned int uitmp;
        u32 if_frequency;
        u8 delivery_system_val, if_val[3], *conf_val_ptr;
        u8 reg_bank2_2d_val, reg_bank0_d2_val;

        dev_dbg(&client->dev,
                "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
                c->delivery_system, c->modulation, c->frequency,
                c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);

        if (!dev->active) {
                ret = -EAGAIN;
                goto err;
        }

        switch (c->delivery_system) {
        case SYS_DVBT:
                delivery_system_val = 0x02;
                reg_bank2_2d_val = 0x23;
                reg_bank0_d2_val = 0x2a;
                break;
        case SYS_DVBT2:
                delivery_system_val = 0x03;
                reg_bank2_2d_val = 0x3b;
                reg_bank0_d2_val = 0x29;
                break;
        case SYS_DVBC_ANNEX_A:
                delivery_system_val = 0x04;
                reg_bank2_2d_val = 0x3b;
                reg_bank0_d2_val = 0x29;
                break;
        default:
                ret = -EINVAL;
                goto err;
        }

        switch (c->delivery_system) {
        case SYS_DVBT:
        case SYS_DVBT2:
                switch (c->bandwidth_hz) {
                case 6000000:
                        conf_val_ptr = "\xe9\x55\x55\x1c\x29\x1c\x29";
                        break;
                case 7000000:
                        conf_val_ptr = "\xc8\x00\x00\x17\x0a\x17\x0a";
                        break;
                case 8000000:
                        conf_val_ptr = "\xaf\x00\x00\x11\xec\x11\xec";
                        break;
                default:
                        ret = -EINVAL;
                        goto err;
                }
                break;
        case SYS_DVBC_ANNEX_A:
                conf_val_ptr = "\x10\xab\x0d\xae\x1d\x9d";
                break;
        default:
                break;
        }

        /* Program tuner */
        if (fe->ops.tuner_ops.set_params) {
                ret = fe->ops.tuner_ops.set_params(fe);
                if (ret)
                        goto err;
        }

        if (fe->ops.tuner_ops.get_if_frequency) {
                ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
                if (ret)
                        goto err;

                dev_dbg(&client->dev, "get_if_frequency=%u\n", if_frequency);
        } else {
                ret = -EINVAL;
                goto err;
        }

        /* Calculate IF registers */
        uitmp = DIV_ROUND_CLOSEST_ULL((u64) if_frequency * 0x1000000, dev->clk);
        if_val[0] = (uitmp >> 16) & 0xff;
        if_val[1] = (uitmp >>  8) & 0xff;
        if_val[2] = (uitmp >>  0) & 0xff;

        ret = regmap_write(dev->regmap[2], 0x05, 0x00);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0xef, 0x13);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0xf9, 0x13);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x00, 0x18);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x01, 0x01);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x02, 0x21);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
        if (ret)
                goto err;

        for (i = 0; i < sizeof(if_val); i++) {
                ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]);
                if (ret)
                        goto err;
        }

        switch (c->delivery_system) {
        case SYS_DVBT:
        case SYS_DVBT2:
                for (i = 0; i < 7; i++) {
                        ret = regmap_write(dev->regmap[2], 0x13 + i,
                                           conf_val_ptr[i]);
                        if (ret)
                                goto err;
                }
                break;
        case SYS_DVBC_ANNEX_A:
                ret = regmap_bulk_write(dev->regmap[1], 0x10, conf_val_ptr, 6);
                if (ret)
                        goto err;
                break;
        default:
                break;
        }

        ret = regmap_write(dev->regmap[2], 0x2d, reg_bank2_2d_val);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x2e, 0x00);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x56, 0x0d);
        if (ret)
                goto err;
        ret = regmap_bulk_write(dev->regmap[0], 0x01,
                                "\xba\x13\x80\xba\x91\xdd\xe7\x28", 8);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x0a, 0x1a);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x13, 0x1f);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x19, 0x03);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x1d, 0xb0);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x2a, 0x72);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x2d, 0x00);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x3c, 0x00);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0x3f, 0xf8);
        if (ret)
                goto err;
        ret = regmap_bulk_write(dev->regmap[0], 0x40, "\xf4\x08", 2);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0xd2, reg_bank0_d2_val);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0xd4, 0x55);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[1], 0xbe, 0x08);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0xb2, 0x37);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[0], 0xd7, 0x04);
        if (ret)
                goto err;

        /* PLP */
        if (c->delivery_system == SYS_DVBT2) {
                ret = regmap_write(dev->regmap[2], 0x36,
                                (c->stream_id == NO_STREAM_ID_FILTER) ? 0 :
                                c->stream_id );
                if (ret)
                        goto err;
        }

        /* Reset FSM */
        ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
        if (ret)
                goto err;

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
        struct i2c_client *client = fe->demodulator_priv;
        struct mn88473_dev *dev = i2c_get_clientdata(client);
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        int ret, i, stmp;
        unsigned int utmp, utmp1, utmp2;
        u8 buf[5];

        if (!dev->active) {
                ret = -EAGAIN;
                goto err;
        }

        /* Lock detection */
        switch (c->delivery_system) {
        case SYS_DVBT:
                ret = regmap_read(dev->regmap[0], 0x62, &utmp);
                if (ret)
                        goto err;

                if (!(utmp & 0xa0)) {
                        if ((utmp & 0x0f) >= 0x09)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
                                          FE_HAS_VITERBI | FE_HAS_SYNC |
                                          FE_HAS_LOCK;
                        else if ((utmp & 0x0f) >= 0x03)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
                } else {
                        *status = 0;
                }
                break;
        case SYS_DVBT2:
                ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
                if (ret)
                        goto err;

                if (!(utmp & 0x40)) {
                        if ((utmp & 0x0f) >= 0x0d)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
                                          FE_HAS_VITERBI | FE_HAS_SYNC |
                                          FE_HAS_LOCK;
                        else if ((utmp & 0x0f) >= 0x0a)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
                                          FE_HAS_VITERBI;
                        else if ((utmp & 0x0f) >= 0x07)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
                } else {
                        *status = 0;
                }
                break;
        case SYS_DVBC_ANNEX_A:
                ret = regmap_read(dev->regmap[1], 0x85, &utmp);
                if (ret)
                        goto err;

                if (!(utmp & 0x40)) {
                        ret = regmap_read(dev->regmap[1], 0x89, &utmp);
                        if (ret)
                                goto err;

                        if (utmp & 0x01)
                                *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
                                                FE_HAS_VITERBI | FE_HAS_SYNC |
                                                FE_HAS_LOCK;
                } else {
                        *status = 0;
                }
                break;
        default:
                ret = -EINVAL;
                goto err;
        }

        /* Signal strength */
        if (*status & FE_HAS_SIGNAL) {
                for (i = 0; i < 2; i++) {
                        ret = regmap_bulk_read(dev->regmap[2], 0x86 + i,
                                               &buf[i], 1);
                        if (ret)
                                goto err;
                }

                /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */
                utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
                dev_dbg(&client->dev, "strength=%u\n", utmp1);

                c->strength.stat[0].scale = FE_SCALE_RELATIVE;
                c->strength.stat[0].uvalue = utmp1;
        } else {
                c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
        }

        /* CNR */
        if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
                /* DVB-T CNR */
                ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2);
                if (ret)
                        goto err;

                utmp = buf[0] << 8 | buf[1] << 0;
                if (utmp) {
                        /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
                        /* log10(65536) = 80807124, 0.2 = 3355443 */
                        stmp = div_u64(((u64)80807124 - intlog10(utmp)
                                        + 3355443) * 10000, 1 << 24);
                        dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
                } else {
                        stmp = 0;
                }

                c->cnr.stat[0].svalue = stmp;
                c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
        } else if (*status & FE_HAS_VITERBI &&
                   c->delivery_system == SYS_DVBT2) {
                /* DVB-T2 CNR */
                for (i = 0; i < 3; i++) {
                        ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i,
                                               &buf[i], 1);
                        if (ret)
                                goto err;
                }

                utmp = buf[1] << 8 | buf[2] << 0;
                utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
                if (utmp) {
                        if (utmp1) {
                                /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */
                                /* log10(16384) = 70706234, 0.6 = 10066330 */
                                stmp = div_u64(((u64)70706234 - intlog10(utmp)
                                                - 10066330) * 10000, 1 << 24);
                                dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
                                        stmp, utmp);
                        } else {
                                /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
                                /* log10(65536) = 80807124, 0.2 = 3355443 */
                                stmp = div_u64(((u64)80807124 - intlog10(utmp)
                                                + 3355443) * 10000, 1 << 24);
                                dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
                                        stmp, utmp);
                        }
                } else {
                        stmp = 0;
                }

                c->cnr.stat[0].svalue = stmp;
                c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
        } else if (*status & FE_HAS_VITERBI &&
                   c->delivery_system == SYS_DVBC_ANNEX_A) {
                /* DVB-C CNR */
                ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
                if (ret)
                        goto err;

                utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
                utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
                if (utmp1 && utmp2) {
                        /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
                        /* log10(8) = 15151336 */
                        stmp = div_u64(((u64)15151336 + intlog10(utmp1)
                                        - intlog10(utmp2)) * 10000, 1 << 24);
                        dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
                                stmp, utmp1, utmp2);
                } else {
                        stmp = 0;
                }

                c->cnr.stat[0].svalue = stmp;
                c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
        } else {
                c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
        }

        /* BER */
        if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT ||
                                      c->delivery_system == SYS_DVBC_ANNEX_A)) {
                /* DVB-T & DVB-C BER */
                ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5);
                if (ret)
                        goto err;

                utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
                utmp2 = buf[3] << 8 | buf[4] << 0;
                utmp2 = utmp2 * 8 * 204;
                dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n",
                        utmp1, utmp2);

                c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
                c->post_bit_error.stat[0].uvalue += utmp1;
                c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
                c->post_bit_count.stat[0].uvalue += utmp2;
        } else {
                c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
                c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
        }

        /* PER */
        if (*status & FE_HAS_LOCK) {
                ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4);
                if (ret)
                        goto err;

                utmp1 = buf[0] << 8 | buf[1] << 0;
                utmp2 = buf[2] << 8 | buf[3] << 0;
                dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
                        utmp1, utmp2);

                c->block_error.stat[0].scale = FE_SCALE_COUNTER;
                c->block_error.stat[0].uvalue += utmp1;
                c->block_count.stat[0].scale = FE_SCALE_COUNTER;
                c->block_count.stat[0].uvalue += utmp2;
        } else {
                c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
                c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
        }

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int mn88473_init(struct dvb_frontend *fe)
{
        struct i2c_client *client = fe->demodulator_priv;
        struct mn88473_dev *dev = i2c_get_clientdata(client);
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        int ret, len, remain;
        unsigned int uitmp;
        const struct firmware *fw;
        const char *name = MN88473_FIRMWARE;

        dev_dbg(&client->dev, "\n");

        /* Check if firmware is already running */
        ret = regmap_read(dev->regmap[0], 0xf5, &uitmp);
        if (ret)
                goto err;

        if (!(uitmp & 0x01))
                goto warm;

        /* Request the firmware, this will block and timeout */
        ret = request_firmware(&fw, name, &client->dev);
        if (ret) {
                dev_err(&client->dev, "firmware file '%s' not found\n", name);
                goto err;
        }

        dev_info(&client->dev, "downloading firmware from file '%s'\n", name);

        ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
        if (ret)
                goto err_release_firmware;

        for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) {
                len = min(dev->i2c_wr_max - 1, remain);
                ret = regmap_bulk_write(dev->regmap[0], 0xf6,
                                        &fw->data[fw->size - remain], len);
                if (ret) {
                        dev_err(&client->dev, "firmware download failed %d\n",
                                ret);
                        goto err_release_firmware;
                }
        }

        release_firmware(fw);

        /* Parity check of firmware */
        ret = regmap_read(dev->regmap[0], 0xf8, &uitmp);
        if (ret)
                goto err;

        if (uitmp & 0x10) {
                dev_err(&client->dev, "firmware parity check failed\n");
                ret = -EINVAL;
                goto err;
        }

        ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
        if (ret)
                goto err;
warm:
        /* TS config */
        ret = regmap_write(dev->regmap[2], 0x09, 0x08);
        if (ret)
                goto err;
        ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
        if (ret)
                goto err;

        dev->active = true;

        /* init stats here to indicate 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;
        c->block_error.len = 1;
        c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
        c->block_count.len = 1;
        c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

        return 0;
err_release_firmware:
        release_firmware(fw);
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int mn88473_sleep(struct dvb_frontend *fe)
{
        struct i2c_client *client = fe->demodulator_priv;
        struct mn88473_dev *dev = i2c_get_clientdata(client);
        int ret;

        dev_dbg(&client->dev, "\n");

        dev->active = false;

        ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
        if (ret)
                goto err;

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static const struct dvb_frontend_ops mn88473_ops = {
        .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
        .info = {
                .name = "Panasonic MN88473",
                .symbol_rate_min = 1000000,
                .symbol_rate_max = 7200000,
                .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_32                  |
                        FE_CAN_QAM_64                  |
                        FE_CAN_QAM_128                 |
                        FE_CAN_QAM_256                 |
                        FE_CAN_QAM_AUTO                |
                        FE_CAN_TRANSMISSION_MODE_AUTO  |
                        FE_CAN_GUARD_INTERVAL_AUTO     |
                        FE_CAN_HIERARCHY_AUTO          |
                        FE_CAN_MUTE_TS                 |
                        FE_CAN_2G_MODULATION           |
                        FE_CAN_MULTISTREAM
        },

        .get_tune_settings = mn88473_get_tune_settings,

        .init = mn88473_init,
        .sleep = mn88473_sleep,

        .set_frontend = mn88473_set_frontend,

        .read_status = mn88473_read_status,
};

static int mn88473_probe(struct i2c_client *client)
{
        struct mn88473_config *config = client->dev.platform_data;
        struct mn88473_dev *dev;
        int ret;
        unsigned int uitmp;
        static const struct regmap_config regmap_config = {
                .reg_bits = 8,
                .val_bits = 8,
        };

        dev_dbg(&client->dev, "\n");

        /* Caller really need to provide pointer for frontend we create */
        if (config->fe == NULL) {
                dev_err(&client->dev, "frontend pointer not defined\n");
                ret = -EINVAL;
                goto err;
        }

        dev = kzalloc_obj(*dev);
        if (dev == NULL) {
                ret = -ENOMEM;
                goto err;
        }

        if (config->i2c_wr_max)
                dev->i2c_wr_max = config->i2c_wr_max;
        else
                dev->i2c_wr_max = ~0;

        if (config->xtal)
                dev->clk = config->xtal;
        else
                dev->clk = 25000000;
        dev->client[0] = client;
        dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
        if (IS_ERR(dev->regmap[0])) {
                ret = PTR_ERR(dev->regmap[0]);
                goto err_kfree;
        }

        /*
         * Chip has three I2C addresses for different register banks. Used
         * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
         * 0x1a and 0x1c, in order to get own I2C client for each register bank.
         *
         * Also, register bank 2 do not support sequential I/O. Only single
         * register write or read is allowed to that bank.
         */
        dev->client[1] = i2c_new_dummy_device(client->adapter, 0x1a);
        if (IS_ERR(dev->client[1])) {
                ret = PTR_ERR(dev->client[1]);
                dev_err(&client->dev, "I2C registration failed\n");
                goto err_regmap_0_regmap_exit;
        }
        dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
        if (IS_ERR(dev->regmap[1])) {
                ret = PTR_ERR(dev->regmap[1]);
                goto err_client_1_i2c_unregister_device;
        }
        i2c_set_clientdata(dev->client[1], dev);

        dev->client[2] = i2c_new_dummy_device(client->adapter, 0x1c);
        if (IS_ERR(dev->client[2])) {
                ret = PTR_ERR(dev->client[2]);
                dev_err(&client->dev, "2nd I2C registration failed\n");
                goto err_regmap_1_regmap_exit;
        }
        dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
        if (IS_ERR(dev->regmap[2])) {
                ret = PTR_ERR(dev->regmap[2]);
                goto err_client_2_i2c_unregister_device;
        }
        i2c_set_clientdata(dev->client[2], dev);

        /* Check demod answers with correct chip id */
        ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
        if (ret)
                goto err_regmap_2_regmap_exit;

        dev_dbg(&client->dev, "chip id=%02x\n", uitmp);

        if (uitmp != 0x03) {
                ret = -ENODEV;
                goto err_regmap_2_regmap_exit;
        }

        /* Sleep because chip is active by default */
        ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
        if (ret)
                goto err_regmap_2_regmap_exit;

        /* Create dvb frontend */
        memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops));
        dev->frontend.demodulator_priv = client;
        *config->fe = &dev->frontend;
        i2c_set_clientdata(client, dev);

        dev_info(&client->dev, "Panasonic MN88473 successfully identified\n");

        return 0;
err_regmap_2_regmap_exit:
        regmap_exit(dev->regmap[2]);
err_client_2_i2c_unregister_device:
        i2c_unregister_device(dev->client[2]);
err_regmap_1_regmap_exit:
        regmap_exit(dev->regmap[1]);
err_client_1_i2c_unregister_device:
        i2c_unregister_device(dev->client[1]);
err_regmap_0_regmap_exit:
        regmap_exit(dev->regmap[0]);
err_kfree:
        kfree(dev);
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static void mn88473_remove(struct i2c_client *client)
{
        struct mn88473_dev *dev = i2c_get_clientdata(client);

        dev_dbg(&client->dev, "\n");

        regmap_exit(dev->regmap[2]);
        i2c_unregister_device(dev->client[2]);

        regmap_exit(dev->regmap[1]);
        i2c_unregister_device(dev->client[1]);

        regmap_exit(dev->regmap[0]);

        kfree(dev);
}

static const struct i2c_device_id mn88473_id_table[] = {
        { "mn88473" },
        {}
};
MODULE_DEVICE_TABLE(i2c, mn88473_id_table);

static struct i2c_driver mn88473_driver = {
        .driver = {
                .name                = "mn88473",
                .suppress_bind_attrs = true,
        },
        .probe          = mn88473_probe,
        .remove         = mn88473_remove,
        .id_table       = mn88473_id_table,
};

module_i2c_driver(mn88473_driver);

MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(MN88473_FIRMWARE);