// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Infineon TUA9001 silicon tuner driver
 *
 * Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
 */

#include "tua9001_priv.h"

static int tua9001_init(struct dvb_frontend *fe)
{
        struct tua9001_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret, i;
        static const struct tua9001_reg_val data[] = {
                {0x1e, 0x6512},
                {0x25, 0xb888},
                {0x39, 0x5460},
                {0x3b, 0x00c0},
                {0x3a, 0xf000},
                {0x08, 0x0000},
                {0x32, 0x0030},
                {0x41, 0x703a},
                {0x40, 0x1c78},
                {0x2c, 0x1c00},
                {0x36, 0xc013},
                {0x37, 0x6f18},
                {0x27, 0x0008},
                {0x2a, 0x0001},
                {0x34, 0x0a40},
        };

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

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RESETN, 0);
                if (ret)
                        goto err;
        }

        for (i = 0; i < ARRAY_SIZE(data); i++) {
                ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
                if (ret)
                        goto err;
        }
        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int tua9001_sleep(struct dvb_frontend *fe)
{
        struct tua9001_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret;

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

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RESETN, 1);
                if (ret)
                        goto err;
        }
        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int tua9001_set_params(struct dvb_frontend *fe)
{
        struct tua9001_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        int ret, i;
        u16 val;
        struct tua9001_reg_val data[2];

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

        switch (c->delivery_system) {
        case SYS_DVBT:
                switch (c->bandwidth_hz) {
                case 8000000:
                        val  = 0x0000;
                        break;
                case 7000000:
                        val  = 0x1000;
                        break;
                case 6000000:
                        val  = 0x2000;
                        break;
                case 5000000:
                        val  = 0x3000;
                        break;
                default:
                        ret = -EINVAL;
                        goto err;
                }
                break;
        default:
                ret = -EINVAL;
                goto err;
        }

        data[0].reg = 0x04;
        data[0].val = val;
        data[1].reg = 0x1f;
        data[1].val = div_u64((u64) (c->frequency - 150000000) * 48, 1000000);

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RXEN, 0);
                if (ret)
                        goto err;
        }

        for (i = 0; i < ARRAY_SIZE(data); i++) {
                ret = regmap_write(dev->regmap, data[i].reg, data[i].val);
                if (ret)
                        goto err;
        }

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RXEN, 1);
                if (ret)
                        goto err;
        }
        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int tua9001_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
        struct tua9001_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;

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

        *frequency = 0; /* Zero-IF */
        return 0;
}

static const struct dvb_tuner_ops tua9001_tuner_ops = {
        .info = {
                .name             = "Infineon TUA9001",
                .frequency_min_hz = 170 * MHz,
                .frequency_max_hz = 862 * MHz,
        },

        .init = tua9001_init,
        .sleep = tua9001_sleep,
        .set_params = tua9001_set_params,

        .get_if_frequency = tua9001_get_if_frequency,
};

static int tua9001_probe(struct i2c_client *client)
{
        struct tua9001_dev *dev;
        struct tua9001_platform_data *pdata = client->dev.platform_data;
        struct dvb_frontend *fe = pdata->dvb_frontend;
        int ret;
        static const struct regmap_config regmap_config = {
                .reg_bits =  8,
                .val_bits = 16,
        };

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

        dev->fe = pdata->dvb_frontend;
        dev->client = client;
        dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
        if (IS_ERR(dev->regmap)) {
                ret = PTR_ERR(dev->regmap);
                goto err_kfree;
        }

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_CEN, 1);
                if (ret)
                        goto err_kfree;

                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RXEN, 0);
                if (ret)
                        goto err_kfree;

                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_RESETN, 1);
                if (ret)
                        goto err_kfree;
        }

        fe->tuner_priv = dev;
        memcpy(&fe->ops.tuner_ops, &tua9001_tuner_ops,
                        sizeof(struct dvb_tuner_ops));
        i2c_set_clientdata(client, dev);

        dev_info(&client->dev, "Infineon TUA9001 successfully attached\n");
        return 0;
err_kfree:
        kfree(dev);
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static void tua9001_remove(struct i2c_client *client)
{
        struct tua9001_dev *dev = i2c_get_clientdata(client);
        struct dvb_frontend *fe = dev->fe;
        int ret;

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

        if (fe->callback) {
                ret = fe->callback(client->adapter,
                                   DVB_FRONTEND_COMPONENT_TUNER,
                                   TUA9001_CMD_CEN, 0);
                if (ret)
                        dev_err(&client->dev, "Tuner disable failed (%pe)\n", ERR_PTR(ret));
        }
        kfree(dev);
}

static const struct i2c_device_id tua9001_id_table[] = {
        { "tua9001" },
        {}
};
MODULE_DEVICE_TABLE(i2c, tua9001_id_table);

static struct i2c_driver tua9001_driver = {
        .driver = {
                .name   = "tua9001",
                .suppress_bind_attrs = true,
        },
        .probe          = tua9001_probe,
        .remove         = tua9001_remove,
        .id_table       = tua9001_id_table,
};

module_i2c_driver(tua9001_driver);

MODULE_DESCRIPTION("Infineon TUA9001 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");