[mirror_ubuntu-jammy-kernel.git] / sound / soc / ti / davinci-vcif.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * ALSA SoC Voice Codec Interface for TI DAVINCI processor
 *
 * Copyright (C) 2010 Texas Instruments.
 *
 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/mfd/davinci_voicecodec.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>

#include "edma-pcm.h"
#include "davinci-i2s.h"

#define MOD_REG_BIT(val, mask, set) do { \
	if (set) { \
		val |= mask; \
	} else { \
		val &= ~mask; \
	} \
} while (0)

struct davinci_vcif_dev {
	struct davinci_vc *davinci_vc;
	struct snd_dmaengine_dai_dma_data dma_data[2];
	int dma_request[2];
};

static void davinci_vcif_start(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct davinci_vcif_dev *davinci_vcif_dev =
			snd_soc_dai_get_drvdata(rtd->cpu_dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Start the sample generator and enable transmitter/receiver */
	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
}

static void davinci_vcif_stop(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct davinci_vcif_dev *davinci_vcif_dev =
			snd_soc_dai_get_drvdata(rtd->cpu_dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Reset transmitter/receiver and sample rate/frame sync generators */
	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
}

static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params,
				  struct snd_soc_dai *dai)
{
	struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Restart the codec before setup */
	davinci_vcif_stop(substream);
	davinci_vcif_start(substream);

	/* General line settings */
	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);

	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);

	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);

	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);

	/* Determine xfer data type */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_U8:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
		break;
	case SNDRV_PCM_FORMAT_S8:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_BITS_8, 1);

		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
		break;
	default:
		printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
		return -EINVAL;
	}

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);

	return 0;
}

static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
				struct snd_soc_dai *dai)
{
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		davinci_vcif_start(substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		davinci_vcif_stop(substream);
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

#define DAVINCI_VCIF_RATES	SNDRV_PCM_RATE_8000_48000

static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
	.trigger	= davinci_vcif_trigger,
	.hw_params	= davinci_vcif_hw_params,
};

static int davinci_vcif_dai_probe(struct snd_soc_dai *dai)
{
	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);

	dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
	dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];

	return 0;
}

static struct snd_soc_dai_driver davinci_vcif_dai = {
	.probe = davinci_vcif_dai_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = DAVINCI_VCIF_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = DAVINCI_VCIF_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = &davinci_vcif_dai_ops,

};

static const struct snd_soc_component_driver davinci_vcif_component = {
	.name		= "davinci-vcif",
};

static int davinci_vcif_probe(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc = pdev->dev.platform_data;
	struct davinci_vcif_dev *davinci_vcif_dev;
	int ret;

	davinci_vcif_dev = devm_kzalloc(&pdev->dev,
					sizeof(struct davinci_vcif_dev),
					GFP_KERNEL);
	if (!davinci_vcif_dev)
		return -ENOMEM;

	/* DMA tx params */
	davinci_vcif_dev->davinci_vc = davinci_vc;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data =
				&davinci_vc->davinci_vcif.dma_tx_channel;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
				davinci_vc->davinci_vcif.dma_tx_addr;

	/* DMA rx params */
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data =
				&davinci_vc->davinci_vcif.dma_rx_channel;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
				davinci_vc->davinci_vcif.dma_rx_addr;

	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);

	ret = devm_snd_soc_register_component(&pdev->dev,
					      &davinci_vcif_component,
					      &davinci_vcif_dai, 1);
	if (ret != 0) {
		dev_err(&pdev->dev, "could not register dai\n");
		return ret;
	}

	ret = edma_pcm_platform_register(&pdev->dev);
	if (ret) {
		dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static struct platform_driver davinci_vcif_driver = {
	.probe		= davinci_vcif_probe,
	.driver		= {
		.name	= "davinci-vcif",
	},
};

module_platform_driver(davinci_vcif_driver);

MODULE_AUTHOR("Miguel Aguilar");
MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
e155fcc2 MA	2	/*
	3	* ALSA SoC Voice Codec Interface for TI DAVINCI processor
	4	*
	5	* Copyright (C) 2010 Texas Instruments.
	6	*
	7	* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
e155fcc2 MA	8	*/
	9
	10	#include <linux/init.h>
	11	#include <linux/module.h>
	12	#include <linux/device.h>
	13	#include <linux/delay.h>
923a0042	14	#include <linux/slab.h>
e155fcc2 MA	15	#include <linux/io.h>
	16	#include <linux/mfd/davinci_voicecodec.h>
	17
	18	#include <sound/core.h>
	19	#include <sound/pcm.h>
	20	#include <sound/pcm_params.h>
	21	#include <sound/initval.h>
	22	#include <sound/soc.h>
62731d33	23	#include <sound/dmaengine_pcm.h>
e155fcc2	24
62731d33	25	#include "edma-pcm.h"
e155fcc2	26	#include "davinci-i2s.h"
e155fcc2 MA	27
	28	#define MOD_REG_BIT(val, mask, set) do { \
	29	if (set) { \
	30	val \|= mask; \
	31	} else { \
	32	val &= ~mask; \
	33	} \
	34	} while (0)
	35
	36	struct davinci_vcif_dev {
	37	struct davinci_vc *davinci_vc;
62731d33 PU	38	struct snd_dmaengine_dai_dma_data dma_data[2];
62731d33 PU	39	int dma_request[2];
e155fcc2 MA	40	};
	41
	42	static void davinci_vcif_start(struct snd_pcm_substream *substream)
	43	{
	44	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	45	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	46	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	47	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	48	u32 w;
	49
	50	/* Start the sample generator and enable transmitter/receiver */
	51	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	52
	53	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3012f43e	54	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
e155fcc2	55	else
3012f43e	56	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
e155fcc2 MA	57
	58	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	59	}
	60
	61	static void davinci_vcif_stop(struct snd_pcm_substream *substream)
	62	{
	63	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	64	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	65	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	66	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	67	u32 w;
	68
	69	/* Reset transmitter/receiver and sample rate/frame sync generators */
	70	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	71	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3012f43e	72	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
e155fcc2	73	else
3012f43e	74	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
e155fcc2 MA	75
	76	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	77	}
	78
	79	static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
	80	struct snd_pcm_hw_params *params,
	81	struct snd_soc_dai *dai)
	82	{
f0fba2ad	83	struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
e155fcc2	84	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
e155fcc2 MA	85	u32 w;
	86
	87	/* Restart the codec before setup */
	88	davinci_vcif_stop(substream);
	89	davinci_vcif_start(substream);
	90
	91	/* General line settings */
	92	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
	93
	94	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
	95
	96	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
	97
	98	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	99
	100	/* Determine xfer data type */
	101	switch (params_format(params)) {
	102	case SNDRV_PCM_FORMAT_U8:
e155fcc2 MA	103	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	104	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	105	DAVINCI_VC_CTRL_WD_BITS_8 \|
	106	DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
	107	break;
	108	case SNDRV_PCM_FORMAT_S8:
e155fcc2 MA	109	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	110	DAVINCI_VC_CTRL_WD_BITS_8, 1);
	111
	112	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED \|
	113	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	114	break;
	115	case SNDRV_PCM_FORMAT_S16_LE:
e155fcc2 MA	116	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	117	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	118	DAVINCI_VC_CTRL_WD_BITS_8 \|
	119	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	120	break;
	121	default:
	122	printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
	123	return -EINVAL;
	124	}
	125
e155fcc2 MA	126	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	127
	128	return 0;
	129	}
	130
	131	static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
	132	struct snd_soc_dai *dai)
	133	{
	134	int ret = 0;
	135
	136	switch (cmd) {
	137	case SNDRV_PCM_TRIGGER_START:
	138	case SNDRV_PCM_TRIGGER_RESUME:
	139	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	140	davinci_vcif_start(substream);
82d1d521	141	break;
e155fcc2 MA	142	case SNDRV_PCM_TRIGGER_STOP:
	143	case SNDRV_PCM_TRIGGER_SUSPEND:
	144	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	145	davinci_vcif_stop(substream);
	146	break;
	147	default:
	148	ret = -EINVAL;
	149	}
	150
	151	return ret;
	152	}
	153
	154	#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
	155
85e7652d	156	static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
e155fcc2 MA	157	.trigger = davinci_vcif_trigger,
	158	.hw_params = davinci_vcif_hw_params,
	159	};
	160
62731d33 PU	161	static int davinci_vcif_dai_probe(struct snd_soc_dai *dai)
	162	{
	163	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);
	164
	165	dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
	166	dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];
	167
	168	return 0;
	169	}
	170
f0fba2ad	171	static struct snd_soc_dai_driver davinci_vcif_dai = {
62731d33	172	.probe = davinci_vcif_dai_probe,
e155fcc2 MA	173	.playback = {
	174	.channels_min = 1,
	175	.channels_max = 2,
	176	.rates = DAVINCI_VCIF_RATES,
	177	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	178	.capture = {
	179	.channels_min = 1,
	180	.channels_max = 2,
	181	.rates = DAVINCI_VCIF_RATES,
	182	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	183	.ops = &davinci_vcif_dai_ops,
	184
	185	};
e155fcc2	186
ee226ce1 KM	187	static const struct snd_soc_component_driver davinci_vcif_component = {
	188	.name = "davinci-vcif",
	189	};
	190
e155fcc2 MA	191	static int davinci_vcif_probe(struct platform_device *pdev)
e155fcc2 MA	192	{
cb5811cf	193	struct davinci_vc *davinci_vc = pdev->dev.platform_data;
e155fcc2 MA	194	struct davinci_vcif_dev *davinci_vcif_dev;
	195	int ret;
	196
a3bb8f3f JL	197	davinci_vcif_dev = devm_kzalloc(&pdev->dev,
	198	sizeof(struct davinci_vcif_dev),
	199	GFP_KERNEL);
dc092339	200	if (!davinci_vcif_dev)
e155fcc2	201	return -ENOMEM;
e155fcc2 MA	202
	203	/* DMA tx params */
	204	davinci_vcif_dev->davinci_vc = davinci_vc;
62731d33 PU	205	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data =
	206	&davinci_vc->davinci_vcif.dma_tx_channel;
	207	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
	208	davinci_vc->davinci_vcif.dma_tx_addr;
e155fcc2 MA	209
e155fcc2 MA	210	/* DMA rx params */
62731d33 PU	211	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data =
	212	&davinci_vc->davinci_vcif.dma_rx_channel;
	213	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
	214	davinci_vc->davinci_vcif.dma_rx_addr;
e155fcc2	215
f0fba2ad	216	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);
e155fcc2	217
553de19a VT	218	ret = devm_snd_soc_register_component(&pdev->dev,
	219	&davinci_vcif_component,
	220	&davinci_vcif_dai, 1);
e155fcc2 MA	221	if (ret != 0) {
e155fcc2 MA	222	dev_err(&pdev->dev, "could not register dai\n");
a3bb8f3f	223	return ret;
e155fcc2 MA	224	}
e155fcc2 MA	225
62731d33	226	ret = edma_pcm_platform_register(&pdev->dev);
f08095a4 HG	227	if (ret) {
f08095a4 HG	228	dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
f08095a4 HG	229	return ret;
	230	}
	231
e155fcc2	232	return 0;
e155fcc2 MA	233	}
e155fcc2 MA	234
e155fcc2 MA	235	static struct platform_driver davinci_vcif_driver = {
e155fcc2 MA	236	.probe = davinci_vcif_probe,
e155fcc2	237	.driver = {
f0fba2ad	238	.name = "davinci-vcif",
e155fcc2 MA	239	},
	240	};
	241
f9b8a514	242	module_platform_driver(davinci_vcif_driver);
e155fcc2 MA	243
	244	MODULE_AUTHOR("Miguel Aguilar");
	245	MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
	246	MODULE_LICENSE("GPL");