// SPDX-License-Identifier: GPL-2.0
/*
 * cxd2880_io.c
 * Sony CXD2880 DVB-T2/T tuner + demodulator driver
 * register I/O interface functions
 *
 * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
 */

#include "cxd2880_io.h"

int cxd2880_io_common_write_one_reg(struct cxd2880_io *io,
                                    enum cxd2880_io_tgt tgt,
                                    u8 sub_address, u8 data)
{
        if (!io)
                return -EINVAL;

        return io->write_regs(io, tgt, sub_address, &data, 1);
}

int cxd2880_io_set_reg_bits(struct cxd2880_io *io,
                            enum cxd2880_io_tgt tgt,
                            u8 sub_address, u8 data, u8 mask)
{
        int ret;

        if (!io)
                return -EINVAL;

        if (mask == 0x00)
                return 0;

        if (mask != 0xff) {
                u8 rdata = 0x00;

                ret = io->read_regs(io, tgt, sub_address, &rdata, 1);
                if (ret)
                        return ret;

                data = (data & mask) | (rdata & (mask ^ 0xff));
        }

        return io->write_reg(io, tgt, sub_address, data);
}

int cxd2880_io_write_multi_regs(struct cxd2880_io *io,
                             enum cxd2880_io_tgt tgt,
                             const struct cxd2880_reg_value reg_value[],
                             u8 size)
{
        int ret;
        int i;

        if (!io)
                return -EINVAL;

        for (i = 0; i < size ; i++) {
                ret = io->write_reg(io, tgt, reg_value[i].addr,
                                    reg_value[i].value);
                if (ret)
                        return ret;
        }

        return 0;
}