// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * helene.c
 *
 * Sony HELENE DVB-S/S2 DVB-T/T2 DVB-C/C2 ISDB-T/S tuner driver (CXD2858ER)
 *
 * Copyright 2012 Sony Corporation
 * Copyright (C) 2014 NetUP Inc.
 * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <linux/types.h>
#include "helene.h"
#include <media/dvb_frontend.h>

#define MAX_WRITE_REGSIZE 20

enum helene_state {
        STATE_UNKNOWN,
        STATE_SLEEP,
        STATE_ACTIVE
};

struct helene_priv {
        u32                     frequency;
        u8                      i2c_address;
        struct i2c_adapter      *i2c;
        enum helene_state       state;
        void                    *set_tuner_data;
        int                     (*set_tuner)(void *, int);
        enum helene_xtal xtal;
};

#define TERR_INTERNAL_LOOPFILTER_AVAILABLE(tv_system) \
        (((tv_system) != SONY_HELENE_DTV_DVBC_6) && \
         ((tv_system) != SONY_HELENE_DTV_DVBC_8)\
         && ((tv_system) != SONY_HELENE_DTV_DVBC2_6) && \
         ((tv_system) != SONY_HELENE_DTV_DVBC2_8))

#define HELENE_AUTO             0xff
#define HELENE_OFFSET(ofs)      ((u8)(ofs) & 0x1F)
#define HELENE_BW_6             0x00
#define HELENE_BW_7             0x01
#define HELENE_BW_8             0x02
#define HELENE_BW_1_7           0x03

enum helene_tv_system_t {
        SONY_HELENE_TV_SYSTEM_UNKNOWN,
        /* Terrestrial Analog */
        SONY_HELENE_ATV_MN_EIAJ,
        /**< System-M (Japan) (IF: Fp=5.75MHz in default) */
        SONY_HELENE_ATV_MN_SAP,
        /**< System-M (US)    (IF: Fp=5.75MHz in default) */
        SONY_HELENE_ATV_MN_A2,
        /**< System-M (Korea) (IF: Fp=5.9MHz in default) */
        SONY_HELENE_ATV_BG,
        /**< System-B/G       (IF: Fp=7.3MHz in default) */
        SONY_HELENE_ATV_I,
        /**< System-I         (IF: Fp=7.85MHz in default) */
        SONY_HELENE_ATV_DK,
        /**< System-D/K       (IF: Fp=7.85MHz in default) */
        SONY_HELENE_ATV_L,
        /**< System-L         (IF: Fp=7.85MHz in default) */
        SONY_HELENE_ATV_L_DASH,
        /**< System-L DASH    (IF: Fp=2.2MHz in default) */
        /* Terrestrial/Cable Digital */
        SONY_HELENE_DTV_8VSB,
        /**< ATSC 8VSB        (IF: Fc=3.7MHz in default) */
        SONY_HELENE_DTV_QAM,
        /**< US QAM           (IF: Fc=3.7MHz in default) */
        SONY_HELENE_DTV_ISDBT_6,
        /**< ISDB-T 6MHzBW    (IF: Fc=3.55MHz in default) */
        SONY_HELENE_DTV_ISDBT_7,
        /**< ISDB-T 7MHzBW    (IF: Fc=4.15MHz in default) */
        SONY_HELENE_DTV_ISDBT_8,
        /**< ISDB-T 8MHzBW    (IF: Fc=4.75MHz in default) */
        SONY_HELENE_DTV_DVBT_5,
        /**< DVB-T 5MHzBW     (IF: Fc=3.6MHz in default) */
        SONY_HELENE_DTV_DVBT_6,
        /**< DVB-T 6MHzBW     (IF: Fc=3.6MHz in default) */
        SONY_HELENE_DTV_DVBT_7,
        /**< DVB-T 7MHzBW     (IF: Fc=4.2MHz in default) */
        SONY_HELENE_DTV_DVBT_8,
        /**< DVB-T 8MHzBW     (IF: Fc=4.8MHz in default) */
        SONY_HELENE_DTV_DVBT2_1_7,
        /**< DVB-T2 1.7MHzBW  (IF: Fc=3.5MHz in default) */
        SONY_HELENE_DTV_DVBT2_5,
        /**< DVB-T2 5MHzBW    (IF: Fc=3.6MHz in default) */
        SONY_HELENE_DTV_DVBT2_6,
        /**< DVB-T2 6MHzBW    (IF: Fc=3.6MHz in default) */
        SONY_HELENE_DTV_DVBT2_7,
        /**< DVB-T2 7MHzBW    (IF: Fc=4.2MHz in default) */
        SONY_HELENE_DTV_DVBT2_8,
        /**< DVB-T2 8MHzBW    (IF: Fc=4.8MHz in default) */
        SONY_HELENE_DTV_DVBC_6,
        /**< DVB-C 6MHzBW     (IF: Fc=3.7MHz in default) */
        SONY_HELENE_DTV_DVBC_8,
        /**< DVB-C 8MHzBW     (IF: Fc=4.9MHz in default) */
        SONY_HELENE_DTV_DVBC2_6,
        /**< DVB-C2 6MHzBW    (IF: Fc=3.7MHz in default) */
        SONY_HELENE_DTV_DVBC2_8,
        /**< DVB-C2 8MHzBW    (IF: Fc=4.9MHz in default) */
        SONY_HELENE_DTV_DTMB,
        /**< DTMB             (IF: Fc=5.1MHz in default) */
        /* Satellite */
        SONY_HELENE_STV_ISDBS,
        /**< ISDB-S */
        SONY_HELENE_STV_DVBS,
        /**< DVB-S */
        SONY_HELENE_STV_DVBS2,
        /**< DVB-S2 */

        SONY_HELENE_ATV_MIN = SONY_HELENE_ATV_MN_EIAJ,
        /**< Minimum analog terrestrial system */
        SONY_HELENE_ATV_MAX = SONY_HELENE_ATV_L_DASH,
        /**< Maximum analog terrestrial system */
        SONY_HELENE_DTV_MIN = SONY_HELENE_DTV_8VSB,
        /**< Minimum digital terrestrial system */
        SONY_HELENE_DTV_MAX = SONY_HELENE_DTV_DTMB,
        /**< Maximum digital terrestrial system */
        SONY_HELENE_TERR_TV_SYSTEM_NUM,
        /**< Number of supported terrestrial broadcasting system */
        SONY_HELENE_STV_MIN = SONY_HELENE_STV_ISDBS,
        /**< Minimum satellite system */
        SONY_HELENE_STV_MAX = SONY_HELENE_STV_DVBS2
        /**< Maximum satellite system */
};

struct helene_terr_adjust_param_t {
        /* < Addr:0x69 Bit[6:4] : RFVGA gain.
         * 0xFF means Auto. (RF_GAIN_SEL = 1)
         */
        uint8_t RF_GAIN;
        /* < Addr:0x69 Bit[3:0] : IF_BPF gain.
        */
        uint8_t IF_BPF_GC;
        /* < Addr:0x6B Bit[3:0] : RF overload
         * RF input detect level. (FRF <= 172MHz)
        */
        uint8_t RFOVLD_DET_LV1_VL;
        /* < Addr:0x6B Bit[3:0] : RF overload
         * RF input detect level. (172MHz < FRF <= 464MHz)
        */
        uint8_t RFOVLD_DET_LV1_VH;
        /* < Addr:0x6B Bit[3:0] : RF overload
         * RF input detect level. (FRF > 464MHz)
        */
        uint8_t RFOVLD_DET_LV1_U;
        /* < Addr:0x6C Bit[2:0] :
         * Internal RFAGC detect level. (FRF <= 172MHz)
        */
        uint8_t IFOVLD_DET_LV_VL;
        /* < Addr:0x6C Bit[2:0] :
         * Internal RFAGC detect level. (172MHz < FRF <= 464MHz)
        */
        uint8_t IFOVLD_DET_LV_VH;
        /* < Addr:0x6C Bit[2:0] :
         * Internal RFAGC detect level. (FRF > 464MHz)
        */
        uint8_t IFOVLD_DET_LV_U;
        /* < Addr:0x6D Bit[5:4] :
         * IF filter center offset.
        */
        uint8_t IF_BPF_F0;
        /* < Addr:0x6D Bit[1:0] :
         * 6MHzBW(0x00) or 7MHzBW(0x01)
         * or 8MHzBW(0x02) or 1.7MHzBW(0x03)
        */
        uint8_t BW;
        /* < Addr:0x6E Bit[4:0] :
         * 5bit signed. IF offset (kHz) = FIF_OFFSET x 50
        */
        uint8_t FIF_OFFSET;
        /* < Addr:0x6F Bit[4:0] :
         * 5bit signed. BW offset (kHz) =
         * BW_OFFSET x 50 (BW_OFFSET x 10 in 1.7MHzBW)
        */
        uint8_t BW_OFFSET;
        /* < Addr:0x9C Bit[0]   :
         * Local polarity. (0: Upper Local, 1: Lower Local)
        */
        uint8_t IS_LOWERLOCAL;
};

static const struct helene_terr_adjust_param_t
terr_params[SONY_HELENE_TERR_TV_SYSTEM_NUM] = {
        /*< SONY_HELENE_TV_SYSTEM_UNKNOWN */
        {HELENE_AUTO, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                HELENE_BW_6, HELENE_OFFSET(0),  HELENE_OFFSET(0),  0x00},
        /* Analog */
        /**< SONY_HELENE_ATV_MN_EIAJ   (System-M (Japan)) */
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(0),  HELENE_OFFSET(1),  0x00},
        /**< SONY_HELENE_ATV_MN_SAP    (System-M (US)) */
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(0),  HELENE_OFFSET(1),  0x00},
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(3),  HELENE_OFFSET(1),  0x00},
        /**< SONY_HELENE_ATV_MN_A2     (System-M (Korea)) */
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_7,  HELENE_OFFSET(11), HELENE_OFFSET(5),  0x00},
        /**< SONY_HELENE_ATV_BG        (System-B/G) */
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(2),  HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_ATV_I         (System-I) */
        {HELENE_AUTO, 0x05, 0x03, 0x06, 0x03, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(2),  HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_ATV_DK        (System-D/K) */
        {HELENE_AUTO, 0x03, 0x04, 0x0A, 0x04, 0x04, 0x04, 0x04, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(2),  HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_ATV_L         (System-L) */
        {HELENE_AUTO, 0x03, 0x04, 0x0A, 0x04, 0x04, 0x04, 0x04, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-1), HELENE_OFFSET(4),  0x00},
        /**< SONY_HELENE_ATV_L_DASH    (System-L DASH) */
        /* Digital */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x03, 0x03, 0x03, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-6), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_8VSB      (ATSC 8VSB) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-6), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_QAM       (US QAM) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-9), HELENE_OFFSET(-5), 0x00},
        /**< SONY_HELENE_DTV_ISDBT_6   (ISDB-T 6MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_7,  HELENE_OFFSET(-7), HELENE_OFFSET(-6), 0x00},
        /**< SONY_HELENE_DTV_ISDBT_7   (ISDB-T 7MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-5), HELENE_OFFSET(-7), 0x00},
        /**< SONY_HELENE_DTV_ISDBT_8   (ISDB-T 8MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-8), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_DVBT_5    (DVB-T 5MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-8), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_DVBT_6    (DVB-T 6MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_7,  HELENE_OFFSET(-6), HELENE_OFFSET(-5), 0x00},
        /**< SONY_HELENE_DTV_DVBT_7    (DVB-T 7MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-4), HELENE_OFFSET(-6), 0x00},
        /**< SONY_HELENE_DTV_DVBT_8    (DVB-T 8MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_1_7, HELENE_OFFSET(-10), HELENE_OFFSET(-10), 0x00},
        /**< SONY_HELENE_DTV_DVBT2_1_7 (DVB-T2 1.7MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-8), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_DVBT2_5   (DVB-T2 5MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-8), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_DVBT2_6   (DVB-T2 6MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_7,  HELENE_OFFSET(-6), HELENE_OFFSET(-5), 0x00},
        /**< SONY_HELENE_DTV_DVBT2_7   (DVB-T2 7MHzBW) */
        {HELENE_AUTO, 0x09, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-4), HELENE_OFFSET(-6), 0x00},
        /**< SONY_HELENE_DTV_DVBT2_8   (DVB-T2 8MHzBW) */
        {HELENE_AUTO, 0x05, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-6), HELENE_OFFSET(-4), 0x00},
        /**< SONY_HELENE_DTV_DVBC_6    (DVB-C 6MHzBW) */
        {HELENE_AUTO, 0x05, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-2), HELENE_OFFSET(-3), 0x00},
        /**< SONY_HELENE_DTV_DVBC_8    (DVB-C 8MHzBW) */
        {HELENE_AUTO, 0x03, 0x09, 0x09, 0x09, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_6,  HELENE_OFFSET(-6), HELENE_OFFSET(-2), 0x00},
        /**< SONY_HELENE_DTV_DVBC2_6   (DVB-C2 6MHzBW) */
        {HELENE_AUTO, 0x03, 0x09, 0x09, 0x09, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(-2), HELENE_OFFSET(0),  0x00},
        /**< SONY_HELENE_DTV_DVBC2_8   (DVB-C2 8MHzBW) */
        {HELENE_AUTO, 0x04, 0x0B, 0x0B, 0x0B, 0x02, 0x02, 0x02, 0x00,
                HELENE_BW_8,  HELENE_OFFSET(2),  HELENE_OFFSET(1),  0x00}
        /**< SONY_HELENE_DTV_DTMB      (DTMB) */
};

static void helene_i2c_debug(struct helene_priv *priv,
                u8 reg, u8 write, const u8 *data, u32 len)
{
        dev_dbg(&priv->i2c->dev, "helene: I2C %s reg 0x%02x size %d\n",
                        (write == 0 ? "read" : "write"), reg, len);
        print_hex_dump_bytes("helene: I2C data: ",
                        DUMP_PREFIX_OFFSET, data, len);
}

static int helene_write_regs(struct helene_priv *priv,
                u8 reg, const u8 *data, u32 len)
{
        int ret;
        u8 buf[MAX_WRITE_REGSIZE + 1];
        struct i2c_msg msg[1] = {
                {
                        .addr = priv->i2c_address,
                        .flags = 0,
                        .len = len + 1,
                        .buf = buf,
                }
        };

        if (len + 1 > sizeof(buf)) {
                dev_warn(&priv->i2c->dev,
                                "wr reg=%04x: len=%d vs %zu is too big!\n",
                                reg, len + 1, sizeof(buf));
                return -E2BIG;
        }

        helene_i2c_debug(priv, reg, 1, data, len);
        buf[0] = reg;
        memcpy(&buf[1], data, len);
        ret = i2c_transfer(priv->i2c, msg, 1);
        if (ret >= 0 && ret != 1)
                ret = -EREMOTEIO;
        if (ret < 0) {
                dev_warn(&priv->i2c->dev,
                                "%s: i2c wr failed=%d reg=%02x len=%d\n",
                                KBUILD_MODNAME, ret, reg, len);
                return ret;
        }
        return 0;
}

static int helene_write_reg(struct helene_priv *priv, u8 reg, u8 val)
{
        u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */

        return helene_write_regs(priv, reg, &tmp, 1);
}

static int helene_read_regs(struct helene_priv *priv,
                u8 reg, u8 *val, u32 len)
{
        int ret;
        struct i2c_msg msg[2] = {
                {
                        .addr = priv->i2c_address,
                        .flags = 0,
                        .len = 1,
                        .buf = &reg,
                }, {
                        .addr = priv->i2c_address,
                        .flags = I2C_M_RD,
                        .len = len,
                        .buf = val,
                }
        };

        ret = i2c_transfer(priv->i2c, &msg[0], 1);
        if (ret >= 0 && ret != 1)
                ret = -EREMOTEIO;
        if (ret < 0) {
                dev_warn(&priv->i2c->dev,
                                "%s: I2C rw failed=%d addr=%02x reg=%02x\n",
                                KBUILD_MODNAME, ret, priv->i2c_address, reg);
                return ret;
        }
        ret = i2c_transfer(priv->i2c, &msg[1], 1);
        if (ret >= 0 && ret != 1)
                ret = -EREMOTEIO;
        if (ret < 0) {
                dev_warn(&priv->i2c->dev,
                                "%s: i2c rd failed=%d addr=%02x reg=%02x\n",
                                KBUILD_MODNAME, ret, priv->i2c_address, reg);
                return ret;
        }
        helene_i2c_debug(priv, reg, 0, val, len);
        return 0;
}

static int helene_read_reg(struct helene_priv *priv, u8 reg, u8 *val)
{
        return helene_read_regs(priv, reg, val, 1);
}

static int helene_set_reg_bits(struct helene_priv *priv,
                u8 reg, u8 data, u8 mask)
{
        int res;
        u8 rdata;

        if (mask != 0xff) {
                res = helene_read_reg(priv, reg, &rdata);
                if (res != 0)
                        return res;
                data = ((data & mask) | (rdata & (mask ^ 0xFF)));
        }
        return helene_write_reg(priv, reg, data);
}

static int helene_enter_power_save(struct helene_priv *priv)
{
        dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
        if (priv->state == STATE_SLEEP)
                return 0;

        /* Standby setting for CPU */
        helene_write_reg(priv, 0x88, 0x0);

        /* Standby setting for internal logic block */
        helene_write_reg(priv, 0x87, 0xC0);

        priv->state = STATE_SLEEP;
        return 0;
}

static int helene_leave_power_save(struct helene_priv *priv)
{
        dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
        if (priv->state == STATE_ACTIVE)
                return 0;

        /* Standby setting for internal logic block */
        helene_write_reg(priv, 0x87, 0xC4);

        /* Standby setting for CPU */
        helene_write_reg(priv, 0x88, 0x40);

        priv->state = STATE_ACTIVE;
        return 0;
}

static int helene_init(struct dvb_frontend *fe)
{
        struct helene_priv *priv = fe->tuner_priv;

        dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
        return helene_leave_power_save(priv);
}

static void helene_release(struct dvb_frontend *fe)
{
        struct helene_priv *priv = fe->tuner_priv;

        dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
        kfree(fe->tuner_priv);
        fe->tuner_priv = NULL;
}

static int helene_sleep(struct dvb_frontend *fe)
{
        struct helene_priv *priv = fe->tuner_priv;

        dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
        helene_enter_power_save(priv);
        return 0;
}

static enum helene_tv_system_t helene_get_tv_system(struct dvb_frontend *fe)
{
        enum helene_tv_system_t system = SONY_HELENE_TV_SYSTEM_UNKNOWN;
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
        struct helene_priv *priv = fe->tuner_priv;

        if (p->delivery_system == SYS_DVBT) {
                if (p->bandwidth_hz <= 5000000)
                        system = SONY_HELENE_DTV_DVBT_5;
                else if (p->bandwidth_hz <= 6000000)
                        system = SONY_HELENE_DTV_DVBT_6;
                else if (p->bandwidth_hz <= 7000000)
                        system = SONY_HELENE_DTV_DVBT_7;
                else if (p->bandwidth_hz <= 8000000)
                        system = SONY_HELENE_DTV_DVBT_8;
                else {
                        system = SONY_HELENE_DTV_DVBT_8;
                        p->bandwidth_hz = 8000000;
                }
        } else if (p->delivery_system == SYS_DVBT2) {
                if (p->bandwidth_hz <= 5000000)
                        system = SONY_HELENE_DTV_DVBT2_5;
                else if (p->bandwidth_hz <= 6000000)
                        system = SONY_HELENE_DTV_DVBT2_6;
                else if (p->bandwidth_hz <= 7000000)
                        system = SONY_HELENE_DTV_DVBT2_7;
                else if (p->bandwidth_hz <= 8000000)
                        system = SONY_HELENE_DTV_DVBT2_8;
                else {
                        system = SONY_HELENE_DTV_DVBT2_8;
                        p->bandwidth_hz = 8000000;
                }
        } else if (p->delivery_system == SYS_DVBS) {
                system = SONY_HELENE_STV_DVBS;
        } else if (p->delivery_system == SYS_DVBS2) {
                system = SONY_HELENE_STV_DVBS2;
        } else if (p->delivery_system == SYS_ISDBS) {
                system = SONY_HELENE_STV_ISDBS;
        } else if (p->delivery_system == SYS_ISDBT) {
                if (p->bandwidth_hz <= 6000000)
                        system = SONY_HELENE_DTV_ISDBT_6;
                else if (p->bandwidth_hz <= 7000000)
                        system = SONY_HELENE_DTV_ISDBT_7;
                else if (p->bandwidth_hz <= 8000000)
                        system = SONY_HELENE_DTV_ISDBT_8;
                else {
                        system = SONY_HELENE_DTV_ISDBT_8;
                        p->bandwidth_hz = 8000000;
                }
        } else if (p->delivery_system == SYS_DVBC_ANNEX_A) {
                if (p->bandwidth_hz <= 6000000)
                        system = SONY_HELENE_DTV_DVBC_6;
                else if (p->bandwidth_hz <= 8000000)
                        system = SONY_HELENE_DTV_DVBC_8;
        }
        dev_dbg(&priv->i2c->dev,
                        "%s(): HELENE DTV system %d (delsys %d, bandwidth %d)\n",
                        __func__, (int)system, p->delivery_system,
                        p->bandwidth_hz);
        return system;
}

static int helene_set_params_s(struct dvb_frontend *fe)
{
        u8 data[MAX_WRITE_REGSIZE];
        u32 frequency;
        enum helene_tv_system_t tv_system;
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
        struct helene_priv *priv = fe->tuner_priv;
        int frequencykHz = p->frequency;
        uint32_t frequency4kHz = 0;
        u32 symbol_rate = p->symbol_rate/1000;

        dev_dbg(&priv->i2c->dev, "%s(): tune frequency %dkHz sr=%uKsps\n",
                        __func__, frequencykHz, symbol_rate);
        tv_system = helene_get_tv_system(fe);

        if (tv_system == SONY_HELENE_TV_SYSTEM_UNKNOWN) {
                dev_err(&priv->i2c->dev, "%s(): unknown DTV system\n",
                                __func__);
                return -EINVAL;
        }
        /* RF switch turn to satellite */
        if (priv->set_tuner)
                priv->set_tuner(priv->set_tuner_data, 0);
        frequency = roundup(p->frequency / 1000, 1);

        /* Disable IF signal output */
        helene_write_reg(priv, 0x15, 0x02);

        /* RFIN matching in power save (Sat) reset */
        helene_write_reg(priv, 0x43, 0x06);

        /* Analog block setting (0x6A, 0x6B) */
        data[0] = 0x00;
        data[1] = 0x00;
        helene_write_regs(priv, 0x6A, data, 2);
        helene_write_reg(priv, 0x75, 0x99);
        helene_write_reg(priv, 0x9D, 0x00);

        /* Tuning setting for CPU (0x61) */
        helene_write_reg(priv, 0x61, 0x07);

        /* Satellite mode select (0x01) */
        helene_write_reg(priv, 0x01, 0x01);

        /* Clock enable for internal logic block, CPU wake-up (0x04, 0x05) */
        data[0] = 0xC4;
        data[1] = 0x40;

        switch (priv->xtal) {
        case SONY_HELENE_XTAL_16000:
                data[2] = 0x02;
                break;
        case SONY_HELENE_XTAL_20500:
                data[2] = 0x02;
                break;
        case SONY_HELENE_XTAL_24000:
                data[2] = 0x03;
                break;
        case SONY_HELENE_XTAL_41000:
                data[2] = 0x05;
                break;
        default:
                dev_err(&priv->i2c->dev, "%s(): unknown xtal %d\n",
                                __func__, priv->xtal);
                return -EINVAL;
        }

        /* Setting for analog block (0x07). LOOPFILTER INTERNAL */
        data[3] = 0x80;

        /* Tuning setting for analog block
         * (0x08, 0x09, 0x0A, 0x0B). LOOPFILTER INTERNAL
        */
        if (priv->xtal == SONY_HELENE_XTAL_20500)
                data[4] = 0x58;
        else
                data[4] = 0x70;

        data[5] = 0x1E;
        data[6] = 0x02;
        data[7] = 0x24;

        /* Enable for analog block (0x0C, 0x0D, 0x0E). SAT LNA ON */
        data[8] = 0x0F;
        data[8] |= 0xE0; /* POWERSAVE_TERR_RF_ACTIVE */
        data[9]  = 0x02;
        data[10] = 0x1E;

        /* Setting for LPF cutoff frequency (0x0F) */
        switch (tv_system) {
        case SONY_HELENE_STV_ISDBS:
                data[11] = 0x22; /* 22MHz */
                break;
        case SONY_HELENE_STV_DVBS:
                if (symbol_rate <= 4000)
                        data[11] = 0x05;
                else if (symbol_rate <= 10000)
                        data[11] = (uint8_t)((symbol_rate * 47
                                                + (40000-1)) / 40000);
                else
                        data[11] = (uint8_t)((symbol_rate * 27
                                                + (40000-1)) / 40000 + 5);

                if (data[11] > 36)
                        data[11] = 36; /* 5 <= lpf_cutoff <= 36 is valid */
                break;
        case SONY_HELENE_STV_DVBS2:
                if (symbol_rate <= 4000)
                        data[11] = 0x05;
                else if (symbol_rate <= 10000)
                        data[11] = (uint8_t)((symbol_rate * 11
                                                + (10000-1)) / 10000);
                else
                        data[11] = (uint8_t)((symbol_rate * 3
                                                + (5000-1)) / 5000 + 5);

                if (data[11] > 36)
                        data[11] = 36; /* 5 <= lpf_cutoff <= 36 is valid */
                break;
        default:
                dev_err(&priv->i2c->dev, "%s(): unknown standard %d\n",
                                __func__, tv_system);
                return -EINVAL;
        }

        /* RF tuning frequency setting (0x10, 0x11, 0x12) */
        frequency4kHz = (frequencykHz + 2) / 4;
        data[12] = (uint8_t)(frequency4kHz & 0xFF);         /* FRF_L */
        data[13] = (uint8_t)((frequency4kHz >> 8) & 0xFF);  /* FRF_M */
        /* FRF_H (bit[3:0]) */
        data[14] = (uint8_t)((frequency4kHz >> 16) & 0x0F);

        /* Tuning command (0x13) */
        data[15] = 0xFF;

        /* Setting for IQOUT_LIMIT (0x14) 0.75Vpp */
        data[16] = 0x00;

        /* Enable IQ output (0x15) */
        data[17] = 0x01;

        helene_write_regs(priv, 0x04, data, 18);

        dev_dbg(&priv->i2c->dev, "%s(): tune done\n",
                        __func__);

        priv->frequency = frequency;
        return 0;
}

static int helene_set_params_t(struct dvb_frontend *fe)
{
        u8 data[MAX_WRITE_REGSIZE];
        u32 frequency;
        enum helene_tv_system_t tv_system;
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
        struct helene_priv *priv = fe->tuner_priv;
        int frequencykHz = p->frequency / 1000;

        dev_dbg(&priv->i2c->dev, "%s(): tune frequency %dkHz\n",
                        __func__, frequencykHz);
        tv_system = helene_get_tv_system(fe);

        if (tv_system == SONY_HELENE_TV_SYSTEM_UNKNOWN) {
                dev_dbg(&priv->i2c->dev, "%s(): unknown DTV system\n",
                                __func__);
                return -EINVAL;
        }
        if (priv->set_tuner)
                priv->set_tuner(priv->set_tuner_data, 1);
        frequency = roundup(p->frequency / 1000, 25);

        /* mode select */
        helene_write_reg(priv, 0x01, 0x00);

        /* Disable IF signal output */
        helene_write_reg(priv, 0x74, 0x02);

        if (priv->state == STATE_SLEEP)
                helene_leave_power_save(priv);

        /* Initial setting for internal analog block (0x91, 0x92) */
        if ((tv_system == SONY_HELENE_DTV_DVBC_6) ||
                        (tv_system == SONY_HELENE_DTV_DVBC_8)) {
                data[0] = 0x16;
                data[1] = 0x26;
        } else {
                data[0] = 0x10;
                data[1] = 0x20;
        }
        helene_write_regs(priv, 0x91, data, 2);

        /* Setting for analog block */
        if (TERR_INTERNAL_LOOPFILTER_AVAILABLE(tv_system))
                data[0] = 0x90;
        else
                data[0] = 0x00;

        /* Setting for local polarity (0x9D) */
        data[1] = (uint8_t)(terr_params[tv_system].IS_LOWERLOCAL & 0x01);
        helene_write_regs(priv, 0x9C, data, 2);

        /* Enable for analog block */
        data[0] = 0xEE;
        data[1] = 0x02;
        data[2] = 0x1E;
        data[3] = 0x67; /* Tuning setting for CPU */

        /* Setting for PLL reference divider for xtal=24MHz */
        if ((tv_system == SONY_HELENE_DTV_DVBC_6) ||
                        (tv_system == SONY_HELENE_DTV_DVBC_8))
                data[4] = 0x18;
        else
                data[4] = 0x03;

        /* Tuning setting for analog block */
        if (TERR_INTERNAL_LOOPFILTER_AVAILABLE(tv_system)) {
                data[5] = 0x38;
                data[6] = 0x1E;
                data[7] = 0x02;
                data[8] = 0x24;
        } else if ((tv_system == SONY_HELENE_DTV_DVBC_6) ||
                        (tv_system == SONY_HELENE_DTV_DVBC_8)) {
                data[5] = 0x1C;
                data[6] = 0x78;
                data[7] = 0x08;
                data[8] = 0x1C;
        } else {
                data[5] = 0xB4;
                data[6] = 0x78;
                data[7] = 0x08;
                data[8] = 0x30;
        }
        helene_write_regs(priv, 0x5E, data, 9);

        /* LT_AMP_EN should be 0 */
        helene_set_reg_bits(priv, 0x67, 0x0, 0x02);

        /* Setting for IFOUT_LIMIT */
        data[0] = 0x00; /* 1.5Vpp */

        /* RF_GAIN setting */
        if (terr_params[tv_system].RF_GAIN == HELENE_AUTO)
                data[1] = 0x80; /* RF_GAIN_SEL = 1 */
        else
                data[1] = (uint8_t)((terr_params[tv_system].RF_GAIN
                                        << 4) & 0x70);

        /* IF_BPF_GC setting */
        data[1] |= (uint8_t)(terr_params[tv_system].IF_BPF_GC & 0x0F);

        /* Setting for internal RFAGC (0x6A, 0x6B, 0x6C) */
        data[2] = 0x00;
        if (frequencykHz <= 172000) {
                data[3] = (uint8_t)(terr_params[tv_system].RFOVLD_DET_LV1_VL
                                & 0x0F);
                data[4] = (uint8_t)(terr_params[tv_system].IFOVLD_DET_LV_VL
                                & 0x07);
        } else if (frequencykHz <= 464000) {
                data[3] = (uint8_t)(terr_params[tv_system].RFOVLD_DET_LV1_VH
                                & 0x0F);
                data[4] = (uint8_t)(terr_params[tv_system].IFOVLD_DET_LV_VH
                                & 0x07);
        } else {
                data[3] = (uint8_t)(terr_params[tv_system].RFOVLD_DET_LV1_U
                                & 0x0F);
                data[4] = (uint8_t)(terr_params[tv_system].IFOVLD_DET_LV_U
                                & 0x07);
        }
        data[4] |= 0x20;

        /* Setting for IF frequency and bandwidth */

        /* IF filter center frequency offset (IF_BPF_F0) (0x6D) */
        data[5] = (uint8_t)((terr_params[tv_system].IF_BPF_F0 << 4) & 0x30);

        /* IF filter band width (BW) (0x6D) */
        data[5] |= (uint8_t)(terr_params[tv_system].BW & 0x03);

        /* IF frequency offset value (FIF_OFFSET) (0x6E) */
        data[6] = (uint8_t)(terr_params[tv_system].FIF_OFFSET & 0x1F);

        /* IF band width offset value (BW_OFFSET) (0x6F) */
        data[7] = (uint8_t)(terr_params[tv_system].BW_OFFSET & 0x1F);

        /* RF tuning frequency setting (0x70, 0x71, 0x72) */
        data[8]  = (uint8_t)(frequencykHz & 0xFF);         /* FRF_L */
        data[9]  = (uint8_t)((frequencykHz >> 8) & 0xFF);  /* FRF_M */
        data[10] = (uint8_t)((frequencykHz >> 16)
                        & 0x0F); /* FRF_H (bit[3:0]) */

        /* Tuning command */
        data[11] = 0xFF;

        /* Enable IF output, AGC and IFOUT pin selection (0x74) */
        data[12] = 0x01;

        if ((tv_system == SONY_HELENE_DTV_DVBC_6) ||
                        (tv_system == SONY_HELENE_DTV_DVBC_8)) {
                data[13] = 0xD9;
                data[14] = 0x0F;
                data[15] = 0x24;
                data[16] = 0x87;
        } else {
                data[13] = 0x99;
                data[14] = 0x00;
                data[15] = 0x24;
                data[16] = 0x87;
        }

        helene_write_regs(priv, 0x68, data, 17);

        dev_dbg(&priv->i2c->dev, "%s(): tune done\n",
                        __func__);

        priv->frequency = frequency;
        return 0;
}

static int helene_set_params(struct dvb_frontend *fe)
{
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;

        if (p->delivery_system == SYS_DVBT ||
            p->delivery_system == SYS_DVBT2 ||
            p->delivery_system == SYS_ISDBT ||
            p->delivery_system == SYS_DVBC_ANNEX_A)
                return helene_set_params_t(fe);

        return helene_set_params_s(fe);
}

static int helene_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
        struct helene_priv *priv = fe->tuner_priv;

        *frequency = priv->frequency * 1000;
        return 0;
}

static const struct dvb_tuner_ops helene_tuner_ops_t = {
        .info = {
                .name = "Sony HELENE Ter tuner",
                .frequency_min_hz  =    1 * MHz,
                .frequency_max_hz  = 1200 * MHz,
                .frequency_step_hz =   25 * kHz,
        },
        .init = helene_init,
        .release = helene_release,
        .sleep = helene_sleep,
        .set_params = helene_set_params_t,
        .get_frequency = helene_get_frequency,
};

static const struct dvb_tuner_ops helene_tuner_ops_s = {
        .info = {
                .name = "Sony HELENE Sat tuner",
                .frequency_min_hz  =  500 * MHz,
                .frequency_max_hz  = 2500 * MHz,
                .frequency_step_hz =    1 * MHz,
        },
        .init = helene_init,
        .release = helene_release,
        .sleep = helene_sleep,
        .set_params = helene_set_params_s,
        .get_frequency = helene_get_frequency,
};

static const struct dvb_tuner_ops helene_tuner_ops = {
        .info = {
                .name = "Sony HELENE Sat/Ter tuner",
                .frequency_min_hz  =    1 * MHz,
                .frequency_max_hz  = 2500 * MHz,
                .frequency_step_hz =   25 * kHz,
        },
        .init = helene_init,
        .release = helene_release,
        .sleep = helene_sleep,
        .set_params = helene_set_params,
        .get_frequency = helene_get_frequency,
};

/* power-on tuner
 * call once after reset
 */
static int helene_x_pon(struct helene_priv *priv)
{
        /* RFIN matching in power save (terrestrial) = ACTIVE */
        /* RFIN matching in power save (satellite) = ACTIVE */
        u8 dataT[] = { 0x06, 0x00, 0x02, 0x00 };
        /* SAT_RF_ACTIVE = true, lnaOff = false, terrRfActive = true */
        u8 dataS[] = { 0x05, 0x06 };
        u8 cdata[] = {0x7A, 0x01};
        u8 data[20];
        u8 rdata[2];

        /* mode select */
        helene_write_reg(priv, 0x01, 0x00);

        helene_write_reg(priv, 0x67, dataT[3]);
        helene_write_reg(priv, 0x43, dataS[1]);
        helene_write_regs(priv, 0x5E, dataT, 3);
        helene_write_reg(priv, 0x0C, dataS[0]);

        /* Initial setting for internal logic block */
        helene_write_regs(priv, 0x99, cdata, sizeof(cdata));

        /* 0x81 - 0x94 */
        if (priv->xtal == SONY_HELENE_XTAL_16000)
                data[0] = 0x10; /* xtal 16 MHz */
        else
                data[0] = 0x18; /* xtal 24 MHz */
        data[1] = (uint8_t)(0x80 | (0x04 & 0x1F)); /* 4 x 25 = 100uA */
        data[2] = (uint8_t)(0x80 | (0x26 & 0x7F)); /* 38 x 0.25 = 9.5pF */
        data[3] = 0x80; /* REFOUT signal output 500mVpp */
        data[4] = 0x00; /* GPIO settings */
        data[5] = 0x00; /* GPIO settings */
        data[6] = 0xC4; /* Clock enable for internal logic block */
        data[7] = 0x40; /* Start CPU boot-up */
        data[8] = 0x10; /* For burst-write */

        /* Setting for internal RFAGC */
        data[9] = 0x00;
        data[10] = 0x45;
        data[11] = 0x75;

        data[12] = 0x07; /* Setting for analog block */

        /* Initial setting for internal analog block */
        data[13] = 0x1C;
        data[14] = 0x3F;
        data[15] = 0x02;
        data[16] = 0x10;
        data[17] = 0x20;
        data[18] = 0x0A;
        data[19] = 0x00;

        helene_write_regs(priv, 0x81, data, sizeof(data));

        /* Setting for internal RFAGC */
        helene_write_reg(priv, 0x9B, 0x00);

        msleep(20);

        /* Check CPU_STT/CPU_ERR */
        helene_read_regs(priv, 0x1A, rdata, sizeof(rdata));

        if (rdata[0] != 0x00) {
                dev_err(&priv->i2c->dev,
                                "HELENE tuner CPU error 0x%x\n", rdata[0]);
                return -EIO;
        }

        /* VCO current setting */
        cdata[0] = 0x90;
        cdata[1] = 0x06;
        helene_write_regs(priv, 0x17, cdata, sizeof(cdata));
        msleep(20);
        helene_read_reg(priv, 0x19, data);
        helene_write_reg(priv, 0x95, (uint8_t)((data[0] >> 4) & 0x0F));

        /* Disable IF signal output */
        helene_write_reg(priv, 0x74, 0x02);

        /* Standby setting for CPU */
        helene_write_reg(priv, 0x88, 0x00);

        /* Standby setting for internal logic block */
        helene_write_reg(priv, 0x87, 0xC0);

        /* Load capacitance control setting for crystal oscillator */
        helene_write_reg(priv, 0x80, 0x01);

        /* Satellite initial setting */
        cdata[0] = 0x07;
        cdata[1] = 0x00;
        helene_write_regs(priv, 0x41, cdata, sizeof(cdata));

        dev_info(&priv->i2c->dev,
                        "HELENE tuner x_pon done\n");

        return 0;
}

struct dvb_frontend *helene_attach_s(struct dvb_frontend *fe,
                const struct helene_config *config,
                struct i2c_adapter *i2c)
{
        struct helene_priv *priv = NULL;

        priv = kzalloc(sizeof(struct helene_priv), GFP_KERNEL);

        if (priv == NULL)
                return NULL;
        priv->i2c_address = (config->i2c_address >> 1);
        priv->i2c = i2c;
        priv->set_tuner_data = config->set_tuner_priv;
        priv->set_tuner = config->set_tuner_callback;
        priv->xtal = config->xtal;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 1);

        if (helene_x_pon(priv) != 0) {
                kfree(priv);
                return NULL;
        }

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 0);

        memcpy(&fe->ops.tuner_ops, &helene_tuner_ops_s,
                        sizeof(struct dvb_tuner_ops));
        fe->tuner_priv = priv;
        dev_info(&priv->i2c->dev,
                        "Sony HELENE Sat attached on addr=%x at I2C adapter %p\n",
                        priv->i2c_address, priv->i2c);
        return fe;
}
EXPORT_SYMBOL(helene_attach_s);

struct dvb_frontend *helene_attach(struct dvb_frontend *fe,
                const struct helene_config *config,
                struct i2c_adapter *i2c)
{
        struct helene_priv *priv = NULL;

        priv = kzalloc(sizeof(struct helene_priv), GFP_KERNEL);
        if (priv == NULL)
                return NULL;
        priv->i2c_address = (config->i2c_address >> 1);
        priv->i2c = i2c;
        priv->set_tuner_data = config->set_tuner_priv;
        priv->set_tuner = config->set_tuner_callback;
        priv->xtal = config->xtal;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 1);

        if (helene_x_pon(priv) != 0) {
                kfree(priv);
                return NULL;
        }

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 0);

        memcpy(&fe->ops.tuner_ops, &helene_tuner_ops_t,
                        sizeof(struct dvb_tuner_ops));
        fe->tuner_priv = priv;
        dev_info(&priv->i2c->dev,
                        "Sony HELENE Ter attached on addr=%x at I2C adapter %p\n",
                        priv->i2c_address, priv->i2c);
        return fe;
}
EXPORT_SYMBOL(helene_attach);

static int helene_probe(struct i2c_client *client,
                        const struct i2c_device_id *id)
{
        struct helene_config *config = client->dev.platform_data;
        struct dvb_frontend *fe = config->fe;
        struct device *dev = &client->dev;
        struct helene_priv *priv;

        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        priv->i2c_address = client->addr;
        priv->i2c = client->adapter;
        priv->set_tuner_data = config->set_tuner_priv;
        priv->set_tuner = config->set_tuner_callback;
        priv->xtal = config->xtal;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 1);

        if (helene_x_pon(priv) != 0)
                return -EINVAL;

        if (fe->ops.i2c_gate_ctrl)
                fe->ops.i2c_gate_ctrl(fe, 0);

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

        dev_info(dev, "Sony HELENE attached on addr=%x at I2C adapter %p\n",
                 priv->i2c_address, priv->i2c);

        return 0;
}

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

static struct i2c_driver helene_driver = {
        .driver = {
                .name = "helene",
        },
        .probe    = helene_probe,
        .id_table = helene_id,
};
module_i2c_driver(helene_driver);

MODULE_DESCRIPTION("Sony HELENE Sat/Ter tuner driver");
MODULE_AUTHOR("Abylay Ospan <aospan@netup.ru>");
MODULE_LICENSE("GPL");