// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/sound/pxa2xx-ac97.c -- AC97 support for the Intel PXA2xx chip.
 *
 * Author:      Nicolas Pitre
 * Created:     Dec 02, 2004
 * Copyright:   MontaVista Software Inc.
 */

#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dmaengine.h>
#include <linux/dma/pxa-dma.h>

#include <sound/ac97/controller.h>
#include <sound/core.h>
#include <sound/ac97_codec.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>

#include <linux/platform_data/asoc-pxa.h>

#define PCDR    0x0040  /* PCM FIFO Data Register */
#define MODR    0x0140  /* Modem FIFO Data Register */
#define MCDR    0x0060  /* Mic-in FIFO Data Register */

static void pxa2xx_ac97_warm_reset(struct ac97_controller *adrv)
{
        pxa2xx_ac97_try_warm_reset();

        pxa2xx_ac97_finish_reset();
}

static void pxa2xx_ac97_cold_reset(struct ac97_controller *adrv)
{
        pxa2xx_ac97_try_cold_reset();

        pxa2xx_ac97_finish_reset();
}

static int pxa2xx_ac97_read_actrl(struct ac97_controller *adrv, int slot,
                                  unsigned short reg)
{
        return pxa2xx_ac97_read(slot, reg);
}

static int pxa2xx_ac97_write_actrl(struct ac97_controller *adrv, int slot,
                                   unsigned short reg, unsigned short val)
{
        return pxa2xx_ac97_write(slot, reg, val);
}

static struct ac97_controller_ops pxa2xx_ac97_ops = {
        .read   = pxa2xx_ac97_read_actrl,
        .write  = pxa2xx_ac97_write_actrl,
        .warm_reset     = pxa2xx_ac97_warm_reset,
        .reset  = pxa2xx_ac97_cold_reset,
};

static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_in = {
        .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
        .chan_name      = "pcm_pcm_stereo_in",
        .maxburst       = 32,
};

static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_stereo_out = {
        .addr_width     = DMA_SLAVE_BUSWIDTH_4_BYTES,
        .chan_name      = "pcm_pcm_stereo_out",
        .maxburst       = 32,
};

static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_out = {
        .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
        .chan_name      = "pcm_aux_mono_out",
        .maxburst       = 16,
};

static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_aux_mono_in = {
        .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
        .chan_name      = "pcm_aux_mono_in",
        .maxburst       = 16,
};

static struct snd_dmaengine_dai_dma_data pxa2xx_ac97_pcm_mic_mono_in = {
        .addr_width     = DMA_SLAVE_BUSWIDTH_2_BYTES,
        .chan_name      = "pcm_aux_mic_mono",
        .maxburst       = 16,
};

static int pxa2xx_ac97_hifi_startup(struct snd_pcm_substream *substream,
                                    struct snd_soc_dai *cpu_dai)
{
        struct snd_dmaengine_dai_dma_data *dma_data;

        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                dma_data = &pxa2xx_ac97_pcm_stereo_out;
        else
                dma_data = &pxa2xx_ac97_pcm_stereo_in;

        snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);

        return 0;
}

static int pxa2xx_ac97_aux_startup(struct snd_pcm_substream *substream,
                                   struct snd_soc_dai *cpu_dai)
{
        struct snd_dmaengine_dai_dma_data *dma_data;

        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                dma_data = &pxa2xx_ac97_pcm_aux_mono_out;
        else
                dma_data = &pxa2xx_ac97_pcm_aux_mono_in;

        snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);

        return 0;
}

static int pxa2xx_ac97_mic_startup(struct snd_pcm_substream *substream,
                                   struct snd_soc_dai *cpu_dai)
{
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                return -ENODEV;
        snd_soc_dai_set_dma_data(cpu_dai, substream,
                                 &pxa2xx_ac97_pcm_mic_mono_in);

        return 0;
}

#define PXA2XX_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
                SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
                SNDRV_PCM_RATE_48000)

static const struct snd_soc_dai_ops pxa_ac97_hifi_dai_ops = {
        .startup        = pxa2xx_ac97_hifi_startup,
};

static const struct snd_soc_dai_ops pxa_ac97_aux_dai_ops = {
        .startup        = pxa2xx_ac97_aux_startup,
};

static const struct snd_soc_dai_ops pxa_ac97_mic_dai_ops = {
        .startup        = pxa2xx_ac97_mic_startup,
};

/*
 * There is only 1 physical AC97 interface for pxa2xx, but it
 * has extra fifo's that can be used for aux DACs and ADCs.
 */
static struct snd_soc_dai_driver pxa_ac97_dai_driver[] = {
{
        .name = "pxa2xx-ac97",
        .playback = {
                .stream_name = "AC97 Playback",
                .channels_min = 2,
                .channels_max = 2,
                .rates = PXA2XX_AC97_RATES,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
        .capture = {
                .stream_name = "AC97 Capture",
                .channels_min = 2,
                .channels_max = 2,
                .rates = PXA2XX_AC97_RATES,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
        .ops = &pxa_ac97_hifi_dai_ops,
},
{
        .name = "pxa2xx-ac97-aux",
        .playback = {
                .stream_name = "AC97 Aux Playback",
                .channels_min = 1,
                .channels_max = 1,
                .rates = PXA2XX_AC97_RATES,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
        .capture = {
                .stream_name = "AC97 Aux Capture",
                .channels_min = 1,
                .channels_max = 1,
                .rates = PXA2XX_AC97_RATES,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
        .ops = &pxa_ac97_aux_dai_ops,
},
{
        .name = "pxa2xx-ac97-mic",
        .capture = {
                .stream_name = "AC97 Mic Capture",
                .channels_min = 1,
                .channels_max = 1,
                .rates = PXA2XX_AC97_RATES,
                .formats = SNDRV_PCM_FMTBIT_S16_LE,},
        .ops = &pxa_ac97_mic_dai_ops,
},
};

static const struct snd_soc_component_driver pxa_ac97_component = {
        .name           = "pxa-ac97",
        .pcm_construct  = pxa2xx_soc_pcm_new,
        .open           = pxa2xx_soc_pcm_open,
        .close          = pxa2xx_soc_pcm_close,
        .hw_params      = pxa2xx_soc_pcm_hw_params,
        .prepare        = pxa2xx_soc_pcm_prepare,
        .trigger        = pxa2xx_soc_pcm_trigger,
        .pointer        = pxa2xx_soc_pcm_pointer,
};

#ifdef CONFIG_OF
static const struct of_device_id pxa2xx_ac97_dt_ids[] = {
        { .compatible = "marvell,pxa250-ac97", },
        { .compatible = "marvell,pxa270-ac97", },
        { .compatible = "marvell,pxa300-ac97", },
        { }
};
MODULE_DEVICE_TABLE(of, pxa2xx_ac97_dt_ids);

#endif

static int pxa2xx_ac97_dev_probe(struct platform_device *pdev)
{
        int ret;
        struct ac97_controller *ctrl;
        struct resource *regs;

        if (pdev->id != -1) {
                dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
                return -ENXIO;
        }

        regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!regs)
                return -ENXIO;

        pxa2xx_ac97_pcm_stereo_in.addr = regs->start + PCDR;
        pxa2xx_ac97_pcm_stereo_out.addr = regs->start + PCDR;
        pxa2xx_ac97_pcm_aux_mono_out.addr = regs->start + MODR;
        pxa2xx_ac97_pcm_aux_mono_in.addr = regs->start + MODR;
        pxa2xx_ac97_pcm_mic_mono_in.addr = regs->start + MCDR;

        ret = pxa2xx_ac97_hw_probe(pdev);
        if (ret) {
                dev_err(&pdev->dev, "PXA2xx AC97 hw probe error (%d)\n", ret);
                return ret;
        }

        ctrl = snd_ac97_controller_register(&pxa2xx_ac97_ops, &pdev->dev,
                                            AC97_SLOTS_AVAILABLE_ALL,
                                            NULL);
        if (IS_ERR(ctrl))
                return PTR_ERR(ctrl);

        platform_set_drvdata(pdev, ctrl);
        /* Punt most of the init to the SoC probe; we may need the machine
         * driver to do interesting things with the clocking to get us up
         * and running.
         */
        return devm_snd_soc_register_component(&pdev->dev, &pxa_ac97_component,
                                          pxa_ac97_dai_driver, ARRAY_SIZE(pxa_ac97_dai_driver));
}

static void pxa2xx_ac97_dev_remove(struct platform_device *pdev)
{
        struct ac97_controller *ctrl = platform_get_drvdata(pdev);

        snd_ac97_controller_unregister(ctrl);
        pxa2xx_ac97_hw_remove(pdev);
}

static int pxa2xx_ac97_dev_suspend(struct device *dev)
{
        return pxa2xx_ac97_hw_suspend();
}

static int pxa2xx_ac97_dev_resume(struct device *dev)
{
        return pxa2xx_ac97_hw_resume();
}

static DEFINE_SIMPLE_DEV_PM_OPS(pxa2xx_ac97_pm_ops,
                pxa2xx_ac97_dev_suspend, pxa2xx_ac97_dev_resume);

static struct platform_driver pxa2xx_ac97_driver = {
        .probe          = pxa2xx_ac97_dev_probe,
        .remove         = pxa2xx_ac97_dev_remove,
        .driver         = {
                .name   = "pxa2xx-ac97",
                .pm     = &pxa2xx_ac97_pm_ops,
                .of_match_table = of_match_ptr(pxa2xx_ac97_dt_ids),
        },
};

module_platform_driver(pxa2xx_ac97_driver);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("AC97 driver for the Intel PXA2xx chip");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-ac97");