// SPDX-License-Identifier: GPL-2.0
//
// Socionext UniPhier AIO ALSA common driver.
//
// Copyright (c) 2016-2018 Socionext Inc.

#include <linux/bitfield.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "aio.h"
#include "aio-reg.h"

static u64 rb_cnt(u64 wr, u64 rd, u64 len)
{
        if (rd <= wr)
                return wr - rd;
        else
                return len - (rd - wr);
}

static u64 rb_cnt_to_end(u64 wr, u64 rd, u64 len)
{
        if (rd <= wr)
                return wr - rd;
        else
                return len - rd;
}

static u64 rb_space(u64 wr, u64 rd, u64 len)
{
        if (rd <= wr)
                return len - (wr - rd) - 8;
        else
                return rd - wr - 8;
}

static u64 rb_space_to_end(u64 wr, u64 rd, u64 len)
{
        if (rd > wr)
                return rd - wr - 8;
        else if (rd > 0)
                return len - wr;
        else
                return len - wr - 8;
}

u64 aio_rb_cnt(struct uniphier_aio_sub *sub)
{
        return rb_cnt(sub->wr_offs, sub->rd_offs, sub->compr_bytes);
}

u64 aio_rbt_cnt_to_end(struct uniphier_aio_sub *sub)
{
        return rb_cnt_to_end(sub->wr_offs, sub->rd_offs, sub->compr_bytes);
}

u64 aio_rb_space(struct uniphier_aio_sub *sub)
{
        return rb_space(sub->wr_offs, sub->rd_offs, sub->compr_bytes);
}

u64 aio_rb_space_to_end(struct uniphier_aio_sub *sub)
{
        return rb_space_to_end(sub->wr_offs, sub->rd_offs, sub->compr_bytes);
}

/**
 * aio_iecout_set_enable - setup IEC output via SoC glue
 * @chip: the AIO chip pointer
 * @enable: false to stop the output, true to start
 *
 * Set enabled or disabled S/PDIF signal output to out of SoC via AOnIEC pins.
 * This function need to call at driver startup.
 *
 * The regmap of SoC glue is specified by 'socionext,syscon' optional property
 * of DT. This function has no effect if no property.
 */
void aio_iecout_set_enable(struct uniphier_aio_chip *chip, bool enable)
{
        struct regmap *r = chip->regmap_sg;

        if (!r)
                return;

        regmap_write(r, SG_AOUTEN, (enable) ? ~0 : 0);
}

/**
 * aio_chip_set_pll - set frequency to audio PLL
 * @chip  : the AIO chip pointer
 * @source: PLL
 * @freq  : frequency in Hz, 0 is ignored
 *
 * Sets frequency of audio PLL. This function can be called anytime,
 * but it takes time till PLL is locked.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_chip_set_pll(struct uniphier_aio_chip *chip, int pll_id,
                     unsigned int freq)
{
        struct device *dev = &chip->pdev->dev;
        struct regmap *r = chip->regmap;
        int shift;
        u32 v;

        /* Not change */
        if (freq == 0)
                return 0;

        switch (pll_id) {
        case AUD_PLL_A1:
                shift = 0;
                break;
        case AUD_PLL_F1:
                shift = 1;
                break;
        case AUD_PLL_A2:
                shift = 2;
                break;
        case AUD_PLL_F2:
                shift = 3;
                break;
        default:
                dev_err(dev, "PLL(%d) not supported\n", pll_id);
                return -EINVAL;
        }

        switch (freq) {
        case 36864000:
                v = A2APLLCTR1_APLLX_36MHZ;
                break;
        case 33868800:
                v = A2APLLCTR1_APLLX_33MHZ;
                break;
        default:
                dev_err(dev, "PLL frequency not supported(%d)\n", freq);
                return -EINVAL;
        }
        chip->plls[pll_id].freq = freq;

        regmap_update_bits(r, A2APLLCTR1, A2APLLCTR1_APLLX_MASK << shift,
                           v << shift);

        return 0;
}

/**
 * aio_chip_init - initialize AIO whole settings
 * @chip: the AIO chip pointer
 *
 * Sets AIO fixed and whole device settings to AIO.
 * This function need to call once at driver startup.
 *
 * The register area that is changed by this function is shared by all
 * modules of AIO. But there is not race condition since this function
 * has always set the same initialize values.
 */
void aio_chip_init(struct uniphier_aio_chip *chip)
{
        struct regmap *r = chip->regmap;

        regmap_update_bits(r, A2APLLCTR0,
                           A2APLLCTR0_APLLXPOW_MASK,
                           A2APLLCTR0_APLLXPOW_PWON);

        regmap_update_bits(r, A2EXMCLKSEL0,
                           A2EXMCLKSEL0_EXMCLK_MASK,
                           A2EXMCLKSEL0_EXMCLK_OUTPUT);

        regmap_update_bits(r, A2AIOINPUTSEL, A2AIOINPUTSEL_RXSEL_MASK,
                           A2AIOINPUTSEL_RXSEL_PCMI1_HDMIRX1 |
                           A2AIOINPUTSEL_RXSEL_PCMI2_SIF |
                           A2AIOINPUTSEL_RXSEL_PCMI3_EVEA |
                           A2AIOINPUTSEL_RXSEL_IECI1_HDMIRX1);

        if (chip->chip_spec->addr_ext)
                regmap_update_bits(r, CDA2D_TEST, CDA2D_TEST_DDR_MODE_MASK,
                                   CDA2D_TEST_DDR_MODE_EXTON0);
        else
                regmap_update_bits(r, CDA2D_TEST, CDA2D_TEST_DDR_MODE_MASK,
                                   CDA2D_TEST_DDR_MODE_EXTOFF1);
}

/**
 * aio_init - initialize AIO substream
 * @sub: the AIO substream pointer
 *
 * Sets fixed settings of each AIO substreams.
 * This function need to call once at substream startup.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_init(struct uniphier_aio_sub *sub)
{
        struct device *dev = &sub->aio->chip->pdev->dev;
        struct regmap *r = sub->aio->chip->regmap;

        regmap_write(r, A2RBNMAPCTR0(sub->swm->rb.hw),
                     MAPCTR0_EN | sub->swm->rb.map);
        regmap_write(r, A2CHNMAPCTR0(sub->swm->ch.hw),
                     MAPCTR0_EN | sub->swm->ch.map);

        switch (sub->swm->type) {
        case PORT_TYPE_I2S:
        case PORT_TYPE_SPDIF:
        case PORT_TYPE_EVE:
                if (sub->swm->dir == PORT_DIR_INPUT) {
                        regmap_write(r, A2IIFNMAPCTR0(sub->swm->iif.hw),
                                     MAPCTR0_EN | sub->swm->iif.map);
                        regmap_write(r, A2IPORTNMAPCTR0(sub->swm->iport.hw),
                                     MAPCTR0_EN | sub->swm->iport.map);
                } else {
                        regmap_write(r, A2OIFNMAPCTR0(sub->swm->oif.hw),
                                     MAPCTR0_EN | sub->swm->oif.map);
                        regmap_write(r, A2OPORTNMAPCTR0(sub->swm->oport.hw),
                                     MAPCTR0_EN | sub->swm->oport.map);
                }
                break;
        case PORT_TYPE_CONV:
                regmap_write(r, A2OIFNMAPCTR0(sub->swm->oif.hw),
                             MAPCTR0_EN | sub->swm->oif.map);
                regmap_write(r, A2OPORTNMAPCTR0(sub->swm->oport.hw),
                             MAPCTR0_EN | sub->swm->oport.map);
                regmap_write(r, A2CHNMAPCTR0(sub->swm->och.hw),
                             MAPCTR0_EN | sub->swm->och.map);
                regmap_write(r, A2IIFNMAPCTR0(sub->swm->iif.hw),
                             MAPCTR0_EN | sub->swm->iif.map);
                break;
        default:
                dev_err(dev, "Unknown port type %d.\n", sub->swm->type);
                return -EINVAL;
        }

        return 0;
}

/**
 * aio_port_reset - reset AIO port block
 * @sub: the AIO substream pointer
 *
 * Resets the digital signal input/output port block of AIO.
 */
void aio_port_reset(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                regmap_write(r, AOUTRSTCTR0, BIT(sub->swm->oport.map));
                regmap_write(r, AOUTRSTCTR1, BIT(sub->swm->oport.map));
        } else {
                regmap_update_bits(r, IPORTMXRSTCTR(sub->swm->iport.map),
                                   IPORTMXRSTCTR_RSTPI_MASK,
                                   IPORTMXRSTCTR_RSTPI_RESET);
                regmap_update_bits(r, IPORTMXRSTCTR(sub->swm->iport.map),
                                   IPORTMXRSTCTR_RSTPI_MASK,
                                   IPORTMXRSTCTR_RSTPI_RELEASE);
        }
}

/**
 * aio_port_set_rate - set sampling rate of LPCM
 * @sub: the AIO substream pointer, PCM substream only
 * @rate: Sampling rate in Hz.
 *
 * Set suitable I2S format settings to input/output port block of AIO.
 * Parameter is specified by hw_params().
 *
 * This function may return error if non-PCM substream.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_port_set_rate(struct uniphier_aio_sub *sub, int rate)
{
        struct regmap *r = sub->aio->chip->regmap;
        struct device *dev = &sub->aio->chip->pdev->dev;
        u32 v;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                switch (rate) {
                case 8000:
                        v = OPORTMXCTR1_FSSEL_8;
                        break;
                case 11025:
                        v = OPORTMXCTR1_FSSEL_11_025;
                        break;
                case 12000:
                        v = OPORTMXCTR1_FSSEL_12;
                        break;
                case 16000:
                        v = OPORTMXCTR1_FSSEL_16;
                        break;
                case 22050:
                        v = OPORTMXCTR1_FSSEL_22_05;
                        break;
                case 24000:
                        v = OPORTMXCTR1_FSSEL_24;
                        break;
                case 32000:
                        v = OPORTMXCTR1_FSSEL_32;
                        break;
                case 44100:
                        v = OPORTMXCTR1_FSSEL_44_1;
                        break;
                case 48000:
                        v = OPORTMXCTR1_FSSEL_48;
                        break;
                case 88200:
                        v = OPORTMXCTR1_FSSEL_88_2;
                        break;
                case 96000:
                        v = OPORTMXCTR1_FSSEL_96;
                        break;
                case 176400:
                        v = OPORTMXCTR1_FSSEL_176_4;
                        break;
                case 192000:
                        v = OPORTMXCTR1_FSSEL_192;
                        break;
                default:
                        dev_err(dev, "Rate not supported(%d)\n", rate);
                        return -EINVAL;
                }

                regmap_update_bits(r, OPORTMXCTR1(sub->swm->oport.map),
                                   OPORTMXCTR1_FSSEL_MASK, v);
        } else {
                switch (rate) {
                case 8000:
                        v = IPORTMXCTR1_FSSEL_8;
                        break;
                case 11025:
                        v = IPORTMXCTR1_FSSEL_11_025;
                        break;
                case 12000:
                        v = IPORTMXCTR1_FSSEL_12;
                        break;
                case 16000:
                        v = IPORTMXCTR1_FSSEL_16;
                        break;
                case 22050:
                        v = IPORTMXCTR1_FSSEL_22_05;
                        break;
                case 24000:
                        v = IPORTMXCTR1_FSSEL_24;
                        break;
                case 32000:
                        v = IPORTMXCTR1_FSSEL_32;
                        break;
                case 44100:
                        v = IPORTMXCTR1_FSSEL_44_1;
                        break;
                case 48000:
                        v = IPORTMXCTR1_FSSEL_48;
                        break;
                case 88200:
                        v = IPORTMXCTR1_FSSEL_88_2;
                        break;
                case 96000:
                        v = IPORTMXCTR1_FSSEL_96;
                        break;
                case 176400:
                        v = IPORTMXCTR1_FSSEL_176_4;
                        break;
                case 192000:
                        v = IPORTMXCTR1_FSSEL_192;
                        break;
                default:
                        dev_err(dev, "Rate not supported(%d)\n", rate);
                        return -EINVAL;
                }

                regmap_update_bits(r, IPORTMXCTR1(sub->swm->iport.map),
                                   IPORTMXCTR1_FSSEL_MASK, v);
        }

        return 0;
}

/**
 * aio_port_set_fmt - set format of I2S data
 * @sub: the AIO substream pointer, PCM substream only
 * This parameter has no effect if substream is I2S or PCM.
 *
 * Set suitable I2S format settings to input/output port block of AIO.
 * Parameter is specified by set_fmt().
 *
 * This function may return error if non-PCM substream.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_port_set_fmt(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        struct device *dev = &sub->aio->chip->pdev->dev;
        u32 v;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                switch (sub->aio->fmt) {
                case SND_SOC_DAIFMT_LEFT_J:
                        v = OPORTMXCTR1_I2SLRSEL_LEFT;
                        break;
                case SND_SOC_DAIFMT_RIGHT_J:
                        v = OPORTMXCTR1_I2SLRSEL_RIGHT;
                        break;
                case SND_SOC_DAIFMT_I2S:
                        v = OPORTMXCTR1_I2SLRSEL_I2S;
                        break;
                default:
                        dev_err(dev, "Format is not supported(%d)\n",
                                sub->aio->fmt);
                        return -EINVAL;
                }

                v |= OPORTMXCTR1_OUTBITSEL_24;
                regmap_update_bits(r, OPORTMXCTR1(sub->swm->oport.map),
                                   OPORTMXCTR1_I2SLRSEL_MASK |
                                   OPORTMXCTR1_OUTBITSEL_MASK, v);
        } else {
                switch (sub->aio->fmt) {
                case SND_SOC_DAIFMT_LEFT_J:
                        v = IPORTMXCTR1_LRSEL_LEFT;
                        break;
                case SND_SOC_DAIFMT_RIGHT_J:
                        v = IPORTMXCTR1_LRSEL_RIGHT;
                        break;
                case SND_SOC_DAIFMT_I2S:
                        v = IPORTMXCTR1_LRSEL_I2S;
                        break;
                default:
                        dev_err(dev, "Format is not supported(%d)\n",
                                sub->aio->fmt);
                        return -EINVAL;
                }

                v |= IPORTMXCTR1_OUTBITSEL_24 |
                        IPORTMXCTR1_CHSEL_ALL;
                regmap_update_bits(r, IPORTMXCTR1(sub->swm->iport.map),
                                   IPORTMXCTR1_LRSEL_MASK |
                                   IPORTMXCTR1_OUTBITSEL_MASK |
                                   IPORTMXCTR1_CHSEL_MASK, v);
        }

        return 0;
}

/**
 * aio_port_set_clk - set clock and divider of AIO port block
 * @sub: the AIO substream pointer
 *
 * Set suitable PLL clock divider and relational settings to
 * input/output port block of AIO. Parameters are specified by
 * set_sysclk() and set_pll().
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_port_set_clk(struct uniphier_aio_sub *sub)
{
        struct uniphier_aio_chip *chip = sub->aio->chip;
        struct device *dev = &sub->aio->chip->pdev->dev;
        struct regmap *r = sub->aio->chip->regmap;
        u32 v_pll[] = {
                OPORTMXCTR2_ACLKSEL_A1, OPORTMXCTR2_ACLKSEL_F1,
                OPORTMXCTR2_ACLKSEL_A2, OPORTMXCTR2_ACLKSEL_F2,
                OPORTMXCTR2_ACLKSEL_A2PLL,
                OPORTMXCTR2_ACLKSEL_RX1,
        };
        u32 v_div[] = {
                OPORTMXCTR2_DACCKSEL_1_2, OPORTMXCTR2_DACCKSEL_1_3,
                OPORTMXCTR2_DACCKSEL_1_1, OPORTMXCTR2_DACCKSEL_2_3,
        };
        u32 v;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                if (sub->swm->type == PORT_TYPE_I2S) {
                        if (sub->aio->pll_out >= ARRAY_SIZE(v_pll)) {
                                dev_err(dev, "PLL(%d) is invalid\n",
                                        sub->aio->pll_out);
                                return -EINVAL;
                        }
                        if (sub->aio->plldiv >= ARRAY_SIZE(v_div)) {
                                dev_err(dev, "PLL divider(%d) is invalid\n",
                                        sub->aio->plldiv);
                                return -EINVAL;
                        }

                        v = v_pll[sub->aio->pll_out] |
                                OPORTMXCTR2_MSSEL_MASTER |
                                v_div[sub->aio->plldiv];

                        switch (chip->plls[sub->aio->pll_out].freq) {
                        case 0:
                        case 36864000:
                        case 33868800:
                                v |= OPORTMXCTR2_EXTLSIFSSEL_36;
                                break;
                        default:
                                v |= OPORTMXCTR2_EXTLSIFSSEL_24;
                                break;
                        }
                } else if (sub->swm->type == PORT_TYPE_EVE) {
                        v = OPORTMXCTR2_ACLKSEL_A2PLL |
                                OPORTMXCTR2_MSSEL_MASTER |
                                OPORTMXCTR2_EXTLSIFSSEL_36 |
                                OPORTMXCTR2_DACCKSEL_1_2;
                } else if (sub->swm->type == PORT_TYPE_SPDIF) {
                        if (sub->aio->pll_out >= ARRAY_SIZE(v_pll)) {
                                dev_err(dev, "PLL(%d) is invalid\n",
                                        sub->aio->pll_out);
                                return -EINVAL;
                        }
                        v = v_pll[sub->aio->pll_out] |
                                OPORTMXCTR2_MSSEL_MASTER |
                                OPORTMXCTR2_DACCKSEL_1_2;

                        switch (chip->plls[sub->aio->pll_out].freq) {
                        case 0:
                        case 36864000:
                        case 33868800:
                                v |= OPORTMXCTR2_EXTLSIFSSEL_36;
                                break;
                        default:
                                v |= OPORTMXCTR2_EXTLSIFSSEL_24;
                                break;
                        }
                } else {
                        v = OPORTMXCTR2_ACLKSEL_A1 |
                                OPORTMXCTR2_MSSEL_MASTER |
                                OPORTMXCTR2_EXTLSIFSSEL_36 |
                                OPORTMXCTR2_DACCKSEL_1_2;
                }
                regmap_write(r, OPORTMXCTR2(sub->swm->oport.map), v);
        } else {
                v = IPORTMXCTR2_ACLKSEL_A1 |
                        IPORTMXCTR2_MSSEL_SLAVE |
                        IPORTMXCTR2_EXTLSIFSSEL_36 |
                        IPORTMXCTR2_DACCKSEL_1_2;
                regmap_write(r, IPORTMXCTR2(sub->swm->iport.map), v);
        }

        return 0;
}

/**
 * aio_port_set_param - set parameters of AIO port block
 * @sub: the AIO substream pointer
 * @pass_through: Zero if sound data is LPCM, otherwise if data is not LPCM.
 * This parameter has no effect if substream is I2S or PCM.
 * @params: hardware parameters of ALSA
 *
 * Set suitable setting to input/output port block of AIO to process the
 * specified in params.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_port_set_param(struct uniphier_aio_sub *sub, int pass_through,
                       const struct snd_pcm_hw_params *params)
{
        struct regmap *r = sub->aio->chip->regmap;
        unsigned int rate;
        u32 v;
        int ret;

        if (!pass_through) {
                if (sub->swm->type == PORT_TYPE_EVE ||
                    sub->swm->type == PORT_TYPE_CONV) {
                        rate = 48000;
                } else {
                        rate = params_rate(params);
                }

                ret = aio_port_set_rate(sub, rate);
                if (ret)
                        return ret;

                ret = aio_port_set_fmt(sub);
                if (ret)
                        return ret;
        }

        ret = aio_port_set_clk(sub);
        if (ret)
                return ret;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                if (pass_through)
                        v = OPORTMXCTR3_SRCSEL_STREAM |
                                OPORTMXCTR3_VALID_STREAM;
                else
                        v = OPORTMXCTR3_SRCSEL_PCM |
                                OPORTMXCTR3_VALID_PCM;

                v |= OPORTMXCTR3_IECTHUR_IECOUT |
                        OPORTMXCTR3_PMSEL_PAUSE |
                        OPORTMXCTR3_PMSW_MUTE_OFF;
                regmap_write(r, OPORTMXCTR3(sub->swm->oport.map), v);
        } else {
                regmap_write(r, IPORTMXACLKSEL0EX(sub->swm->iport.map),
                             IPORTMXACLKSEL0EX_ACLKSEL0EX_INTERNAL);
                regmap_write(r, IPORTMXEXNOE(sub->swm->iport.map),
                             IPORTMXEXNOE_PCMINOE_INPUT);
        }

        return 0;
}

/**
 * aio_port_set_enable - start or stop of AIO port block
 * @sub: the AIO substream pointer
 * @enable: zero to stop the block, otherwise to start
 *
 * Start or stop the signal input/output port block of AIO.
 */
void aio_port_set_enable(struct uniphier_aio_sub *sub, int enable)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                regmap_write(r, OPORTMXPATH(sub->swm->oport.map),
                             sub->swm->oif.map);

                regmap_update_bits(r, OPORTMXMASK(sub->swm->oport.map),
                                   OPORTMXMASK_IUDXMSK_MASK |
                                   OPORTMXMASK_IUXCKMSK_MASK |
                                   OPORTMXMASK_DXMSK_MASK |
                                   OPORTMXMASK_XCKMSK_MASK,
                                   OPORTMXMASK_IUDXMSK_OFF |
                                   OPORTMXMASK_IUXCKMSK_OFF |
                                   OPORTMXMASK_DXMSK_OFF |
                                   OPORTMXMASK_XCKMSK_OFF);

                if (enable)
                        regmap_write(r, AOUTENCTR0, BIT(sub->swm->oport.map));
                else
                        regmap_write(r, AOUTENCTR1, BIT(sub->swm->oport.map));
        } else {
                regmap_update_bits(r, IPORTMXMASK(sub->swm->iport.map),
                                   IPORTMXMASK_IUXCKMSK_MASK |
                                   IPORTMXMASK_XCKMSK_MASK,
                                   IPORTMXMASK_IUXCKMSK_OFF |
                                   IPORTMXMASK_XCKMSK_OFF);

                if (enable)
                        regmap_update_bits(r,
                                           IPORTMXCTR2(sub->swm->iport.map),
                                           IPORTMXCTR2_REQEN_MASK,
                                           IPORTMXCTR2_REQEN_ENABLE);
                else
                        regmap_update_bits(r,
                                           IPORTMXCTR2(sub->swm->iport.map),
                                           IPORTMXCTR2_REQEN_MASK,
                                           IPORTMXCTR2_REQEN_DISABLE);
        }
}

/**
 * aio_port_get_volume - get volume of AIO port block
 * @sub: the AIO substream pointer
 *
 * Return: current volume, range is 0x0000 - 0xffff
 */
int aio_port_get_volume(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 v;

        regmap_read(r, OPORTMXTYVOLGAINSTATUS(sub->swm->oport.map, 0), &v);

        return FIELD_GET(OPORTMXTYVOLGAINSTATUS_CUR_MASK, v);
}

/**
 * aio_port_set_volume - set volume of AIO port block
 * @sub: the AIO substream pointer
 * @vol: target volume, range is 0x0000 - 0xffff.
 *
 * Change digital volume and perfome fade-out/fade-in effect for specified
 * output slot of port. Gained PCM value can calculate as the following:
 *   Gained = Original * vol / 0x4000
 */
void aio_port_set_volume(struct uniphier_aio_sub *sub, int vol)
{
        struct regmap *r = sub->aio->chip->regmap;
        int oport_map = sub->swm->oport.map;
        int cur, diff, slope = 0, fs;

        if (sub->swm->dir == PORT_DIR_INPUT)
                return;

        cur = aio_port_get_volume(sub);
        diff = abs(vol - cur);
        fs = params_rate(&sub->params);
        if (fs)
                slope = diff / AUD_VOL_FADE_TIME * 1000 / fs;
        slope = max(1, slope);

        regmap_update_bits(r, OPORTMXTYVOLPARA1(oport_map, 0),
                           OPORTMXTYVOLPARA1_SLOPEU_MASK, slope << 16);
        regmap_update_bits(r, OPORTMXTYVOLPARA2(oport_map, 0),
                           OPORTMXTYVOLPARA2_TARGET_MASK, vol);

        if (cur < vol)
                regmap_update_bits(r, OPORTMXTYVOLPARA2(oport_map, 0),
                                   OPORTMXTYVOLPARA2_FADE_MASK,
                                   OPORTMXTYVOLPARA2_FADE_FADEIN);
        else
                regmap_update_bits(r, OPORTMXTYVOLPARA2(oport_map, 0),
                                   OPORTMXTYVOLPARA2_FADE_MASK,
                                   OPORTMXTYVOLPARA2_FADE_FADEOUT);

        regmap_write(r, AOUTFADECTR0, BIT(oport_map));
}

/**
 * aio_if_set_param - set parameters of AIO DMA I/F block
 * @sub: the AIO substream pointer
 * @pass_through: Zero if sound data is LPCM, otherwise if data is not LPCM.
 * This parameter has no effect if substream is I2S or PCM.
 *
 * Set suitable setting to DMA interface block of AIO to process the
 * specified in settings.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_if_set_param(struct uniphier_aio_sub *sub, int pass_through)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 v;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                if (pass_through)
                        v = PBOUTMXCTR0_ENDIAN_0123 |
                                PBOUTMXCTR0_MEMFMT_STREAM;
                else
                        v = PBOUTMXCTR0_ENDIAN_3210 |
                                PBOUTMXCTR0_MEMFMT_2CH;

                regmap_write(r, PBOUTMXCTR0(sub->swm->oif.map), v);
                regmap_write(r, PBOUTMXCTR1(sub->swm->oif.map), 0);
        } else {
                regmap_write(r, PBINMXCTR(sub->swm->iif.map),
                             PBINMXCTR_NCONNECT_CONNECT |
                             PBINMXCTR_INOUTSEL_IN |
                             (sub->swm->iport.map << PBINMXCTR_PBINSEL_SHIFT) |
                             PBINMXCTR_ENDIAN_3210 |
                             PBINMXCTR_MEMFMT_D0);
        }

        return 0;
}

/**
 * aio_oport_set_stream_type - set parameters of AIO playback port block
 * @sub: the AIO substream pointer
 * @pc: Pc type of IEC61937
 *
 * Set special setting to output port block of AIO to output the stream
 * via S/PDIF.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_oport_set_stream_type(struct uniphier_aio_sub *sub,
                              enum IEC61937_PC pc)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 repet = 0, pause = OPORTMXPAUDAT_PAUSEPC_CMN;

        switch (pc) {
        case IEC61937_PC_AC3:
                repet = OPORTMXREPET_STRLENGTH_AC3 |
                        OPORTMXREPET_PMLENGTH_AC3;
                pause |= OPORTMXPAUDAT_PAUSEPD_AC3;
                break;
        case IEC61937_PC_MPA:
                repet = OPORTMXREPET_STRLENGTH_MPA |
                        OPORTMXREPET_PMLENGTH_MPA;
                pause |= OPORTMXPAUDAT_PAUSEPD_MPA;
                break;
        case IEC61937_PC_MP3:
                repet = OPORTMXREPET_STRLENGTH_MP3 |
                        OPORTMXREPET_PMLENGTH_MP3;
                pause |= OPORTMXPAUDAT_PAUSEPD_MP3;
                break;
        case IEC61937_PC_DTS1:
                repet = OPORTMXREPET_STRLENGTH_DTS1 |
                        OPORTMXREPET_PMLENGTH_DTS1;
                pause |= OPORTMXPAUDAT_PAUSEPD_DTS1;
                break;
        case IEC61937_PC_DTS2:
                repet = OPORTMXREPET_STRLENGTH_DTS2 |
                        OPORTMXREPET_PMLENGTH_DTS2;
                pause |= OPORTMXPAUDAT_PAUSEPD_DTS2;
                break;
        case IEC61937_PC_DTS3:
                repet = OPORTMXREPET_STRLENGTH_DTS3 |
                        OPORTMXREPET_PMLENGTH_DTS3;
                pause |= OPORTMXPAUDAT_PAUSEPD_DTS3;
                break;
        case IEC61937_PC_AAC:
                repet = OPORTMXREPET_STRLENGTH_AAC |
                        OPORTMXREPET_PMLENGTH_AAC;
                pause |= OPORTMXPAUDAT_PAUSEPD_AAC;
                break;
        case IEC61937_PC_PAUSE:
                /* Do nothing */
                break;
        }

        regmap_write(r, OPORTMXREPET(sub->swm->oport.map), repet);
        regmap_write(r, OPORTMXPAUDAT(sub->swm->oport.map), pause);

        return 0;
}

/**
 * aio_src_reset - reset AIO SRC block
 * @sub: the AIO substream pointer
 *
 * Resets the digital signal input/output port with sampling rate converter
 * block of AIO.
 * This function has no effect if substream is not supported rate converter.
 */
void aio_src_reset(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (sub->swm->dir != PORT_DIR_OUTPUT)
                return;

        regmap_write(r, AOUTSRCRSTCTR0, BIT(sub->swm->oport.map));
        regmap_write(r, AOUTSRCRSTCTR1, BIT(sub->swm->oport.map));
}

/**
 * aio_src_set_param - set parameters of AIO SRC block
 * @sub: the AIO substream pointer
 * @params: hardware parameters of ALSA
 *
 * Set suitable setting to input/output port with sampling rate converter
 * block of AIO to process the specified in params.
 * This function has no effect if substream is not supported rate converter.
 *
 * Return: Zero if successful, otherwise a negative value on error.
 */
int aio_src_set_param(struct uniphier_aio_sub *sub,
                      const struct snd_pcm_hw_params *params)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 v;

        if (sub->swm->dir != PORT_DIR_OUTPUT)
                return 0;

        regmap_write(r, OPORTMXSRC1CTR(sub->swm->oport.map),
                     OPORTMXSRC1CTR_THMODE_SRC |
                     OPORTMXSRC1CTR_SRCPATH_CALC |
                     OPORTMXSRC1CTR_SYNC_ASYNC |
                     OPORTMXSRC1CTR_FSIIPSEL_INNER |
                     OPORTMXSRC1CTR_FSISEL_ACLK);

        switch (params_rate(params)) {
        default:
        case 48000:
                v = OPORTMXRATE_I_ACLKSEL_APLLA1 |
                        OPORTMXRATE_I_MCKSEL_36 |
                        OPORTMXRATE_I_FSSEL_48;
                break;
        case 44100:
                v = OPORTMXRATE_I_ACLKSEL_APLLA2 |
                        OPORTMXRATE_I_MCKSEL_33 |
                        OPORTMXRATE_I_FSSEL_44_1;
                break;
        case 32000:
                v = OPORTMXRATE_I_ACLKSEL_APLLA1 |
                        OPORTMXRATE_I_MCKSEL_36 |
                        OPORTMXRATE_I_FSSEL_32;
                break;
        }

        regmap_write(r, OPORTMXRATE_I(sub->swm->oport.map),
                     v | OPORTMXRATE_I_ACLKSRC_APLL |
                     OPORTMXRATE_I_LRCKSTP_STOP);
        regmap_update_bits(r, OPORTMXRATE_I(sub->swm->oport.map),
                           OPORTMXRATE_I_LRCKSTP_MASK,
                           OPORTMXRATE_I_LRCKSTP_START);

        return 0;
}

int aio_srcif_set_param(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;

        regmap_write(r, PBINMXCTR(sub->swm->iif.map),
                     PBINMXCTR_NCONNECT_CONNECT |
                     PBINMXCTR_INOUTSEL_OUT |
                     (sub->swm->oport.map << PBINMXCTR_PBINSEL_SHIFT) |
                     PBINMXCTR_ENDIAN_3210 |
                     PBINMXCTR_MEMFMT_D0);

        return 0;
}

int aio_srcch_set_param(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;

        regmap_write(r, CDA2D_CHMXCTRL1(sub->swm->och.map),
                     CDA2D_CHMXCTRL1_INDSIZE_INFINITE);

        regmap_write(r, CDA2D_CHMXSRCAMODE(sub->swm->och.map),
                     CDA2D_CHMXAMODE_ENDIAN_3210 |
                     CDA2D_CHMXAMODE_AUPDT_FIX |
                     CDA2D_CHMXAMODE_TYPE_NORMAL);

        regmap_write(r, CDA2D_CHMXDSTAMODE(sub->swm->och.map),
                     CDA2D_CHMXAMODE_ENDIAN_3210 |
                     CDA2D_CHMXAMODE_AUPDT_INC |
                     CDA2D_CHMXAMODE_TYPE_RING |
                     (sub->swm->och.map << CDA2D_CHMXAMODE_RSSEL_SHIFT));

        return 0;
}

void aio_srcch_set_enable(struct uniphier_aio_sub *sub, int enable)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 v;

        if (enable)
                v = CDA2D_STRT0_STOP_START;
        else
                v = CDA2D_STRT0_STOP_STOP;

        regmap_write(r, CDA2D_STRT0,
                     v | BIT(sub->swm->och.map));
}

int aiodma_ch_set_param(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 v;

        regmap_write(r, CDA2D_CHMXCTRL1(sub->swm->ch.map),
                     CDA2D_CHMXCTRL1_INDSIZE_INFINITE);

        v = CDA2D_CHMXAMODE_ENDIAN_3210 |
                CDA2D_CHMXAMODE_AUPDT_INC |
                CDA2D_CHMXAMODE_TYPE_NORMAL |
                (sub->swm->rb.map << CDA2D_CHMXAMODE_RSSEL_SHIFT);
        if (sub->swm->dir == PORT_DIR_OUTPUT)
                regmap_write(r, CDA2D_CHMXSRCAMODE(sub->swm->ch.map), v);
        else
                regmap_write(r, CDA2D_CHMXDSTAMODE(sub->swm->ch.map), v);

        return 0;
}

void aiodma_ch_set_enable(struct uniphier_aio_sub *sub, int enable)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (enable) {
                regmap_write(r, CDA2D_STRT0,
                             CDA2D_STRT0_STOP_START | BIT(sub->swm->ch.map));

                regmap_update_bits(r, INTRBIM(0),
                                   BIT(sub->swm->rb.map),
                                   BIT(sub->swm->rb.map));
        } else {
                regmap_write(r, CDA2D_STRT0,
                             CDA2D_STRT0_STOP_STOP | BIT(sub->swm->ch.map));

                regmap_update_bits(r, INTRBIM(0),
                                   BIT(sub->swm->rb.map),
                                   0);
        }
}

static u64 aiodma_rb_get_rp(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 pos_u, pos_l;
        int i;

        regmap_write(r, CDA2D_RDPTRLOAD,
                     CDA2D_RDPTRLOAD_LSFLAG_STORE | BIT(sub->swm->rb.map));
        /* Wait for setup */
        for (i = 0; i < 6; i++)
                regmap_read(r, CDA2D_RBMXRDPTR(sub->swm->rb.map), &pos_l);

        regmap_read(r, CDA2D_RBMXRDPTR(sub->swm->rb.map), &pos_l);
        regmap_read(r, CDA2D_RBMXRDPTRU(sub->swm->rb.map), &pos_u);
        pos_u = FIELD_GET(CDA2D_RBMXPTRU_PTRU_MASK, pos_u);

        return ((u64)pos_u << 32) | pos_l;
}

static void aiodma_rb_set_rp(struct uniphier_aio_sub *sub, u64 pos)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 tmp;
        int i;

        regmap_write(r, CDA2D_RBMXRDPTR(sub->swm->rb.map), (u32)pos);
        regmap_write(r, CDA2D_RBMXRDPTRU(sub->swm->rb.map), (u32)(pos >> 32));
        regmap_write(r, CDA2D_RDPTRLOAD, BIT(sub->swm->rb.map));
        /* Wait for setup */
        for (i = 0; i < 6; i++)
                regmap_read(r, CDA2D_RBMXRDPTR(sub->swm->rb.map), &tmp);
}

static u64 aiodma_rb_get_wp(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 pos_u, pos_l;
        int i;

        regmap_write(r, CDA2D_WRPTRLOAD,
                     CDA2D_WRPTRLOAD_LSFLAG_STORE | BIT(sub->swm->rb.map));
        /* Wait for setup */
        for (i = 0; i < 6; i++)
                regmap_read(r, CDA2D_RBMXWRPTR(sub->swm->rb.map), &pos_l);

        regmap_read(r, CDA2D_RBMXWRPTR(sub->swm->rb.map), &pos_l);
        regmap_read(r, CDA2D_RBMXWRPTRU(sub->swm->rb.map), &pos_u);
        pos_u = FIELD_GET(CDA2D_RBMXPTRU_PTRU_MASK, pos_u);

        return ((u64)pos_u << 32) | pos_l;
}

static void aiodma_rb_set_wp(struct uniphier_aio_sub *sub, u64 pos)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 tmp;
        int i;

        regmap_write(r, CDA2D_RBMXWRPTR(sub->swm->rb.map),
                     lower_32_bits(pos));
        regmap_write(r, CDA2D_RBMXWRPTRU(sub->swm->rb.map),
                     upper_32_bits(pos));
        regmap_write(r, CDA2D_WRPTRLOAD, BIT(sub->swm->rb.map));
        /* Wait for setup */
        for (i = 0; i < 6; i++)
                regmap_read(r, CDA2D_RBMXWRPTR(sub->swm->rb.map), &tmp);
}

int aiodma_rb_set_threshold(struct uniphier_aio_sub *sub, u64 size, u32 th)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (size <= th)
                return -EINVAL;

        regmap_write(r, CDA2D_RBMXBTH(sub->swm->rb.map), th);
        regmap_write(r, CDA2D_RBMXRTH(sub->swm->rb.map), th);

        return 0;
}

int aiodma_rb_set_buffer(struct uniphier_aio_sub *sub, u64 start, u64 end,
                         int period)
{
        struct regmap *r = sub->aio->chip->regmap;
        u64 size = end - start;
        int ret;

        if (end < start || period < 0)
                return -EINVAL;

        regmap_write(r, CDA2D_RBMXCNFG(sub->swm->rb.map), 0);
        regmap_write(r, CDA2D_RBMXBGNADRS(sub->swm->rb.map),
                     lower_32_bits(start));
        regmap_write(r, CDA2D_RBMXBGNADRSU(sub->swm->rb.map),
                     upper_32_bits(start));
        regmap_write(r, CDA2D_RBMXENDADRS(sub->swm->rb.map),
                     lower_32_bits(end));
        regmap_write(r, CDA2D_RBMXENDADRSU(sub->swm->rb.map),
                     upper_32_bits(end));

        regmap_write(r, CDA2D_RBADRSLOAD, BIT(sub->swm->rb.map));

        ret = aiodma_rb_set_threshold(sub, size, 2 * period);
        if (ret)
                return ret;

        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                aiodma_rb_set_rp(sub, start);
                aiodma_rb_set_wp(sub, end - period);

                regmap_update_bits(r, CDA2D_RBMXIE(sub->swm->rb.map),
                                   CDA2D_RBMXIX_SPACE,
                                   CDA2D_RBMXIX_SPACE);
        } else {
                aiodma_rb_set_rp(sub, end - period);
                aiodma_rb_set_wp(sub, start);

                regmap_update_bits(r, CDA2D_RBMXIE(sub->swm->rb.map),
                                   CDA2D_RBMXIX_REMAIN,
                                   CDA2D_RBMXIX_REMAIN);
        }

        sub->threshold = 2 * period;
        sub->rd_offs = 0;
        sub->wr_offs = 0;
        sub->rd_org = 0;
        sub->wr_org = 0;
        sub->rd_total = 0;
        sub->wr_total = 0;

        return 0;
}

void aiodma_rb_sync(struct uniphier_aio_sub *sub, u64 start, u64 size,
                    int period)
{
        if (sub->swm->dir == PORT_DIR_OUTPUT) {
                sub->rd_offs = aiodma_rb_get_rp(sub) - start;

                if (sub->use_mmap) {
                        sub->threshold = 2 * period;
                        aiodma_rb_set_threshold(sub, size, 2 * period);

                        sub->wr_offs = sub->rd_offs - period;
                        if (sub->rd_offs < period)
                                sub->wr_offs += size;
                }
                aiodma_rb_set_wp(sub, sub->wr_offs + start);
        } else {
                sub->wr_offs = aiodma_rb_get_wp(sub) - start;

                if (sub->use_mmap) {
                        sub->threshold = 2 * period;
                        aiodma_rb_set_threshold(sub, size, 2 * period);

                        sub->rd_offs = sub->wr_offs - period;
                        if (sub->wr_offs < period)
                                sub->rd_offs += size;
                }
                aiodma_rb_set_rp(sub, sub->rd_offs + start);
        }

        sub->rd_total += sub->rd_offs - sub->rd_org;
        if (sub->rd_offs < sub->rd_org)
                sub->rd_total += size;
        sub->wr_total += sub->wr_offs - sub->wr_org;
        if (sub->wr_offs < sub->wr_org)
                sub->wr_total += size;

        sub->rd_org = sub->rd_offs;
        sub->wr_org = sub->wr_offs;
}

bool aiodma_rb_is_irq(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;
        u32 ir;

        regmap_read(r, CDA2D_RBMXIR(sub->swm->rb.map), &ir);

        if (sub->swm->dir == PORT_DIR_OUTPUT)
                return !!(ir & CDA2D_RBMXIX_SPACE);
        else
                return !!(ir & CDA2D_RBMXIX_REMAIN);
}

void aiodma_rb_clear_irq(struct uniphier_aio_sub *sub)
{
        struct regmap *r = sub->aio->chip->regmap;

        if (sub->swm->dir == PORT_DIR_OUTPUT)
                regmap_write(r, CDA2D_RBMXIR(sub->swm->rb.map),
                             CDA2D_RBMXIX_SPACE);
        else
                regmap_write(r, CDA2D_RBMXIR(sub->swm->rb.map),
                             CDA2D_RBMXIX_REMAIN);
}