[deliverable/linux.git] / sound / soc / fsl / imx-ssi.c

/*
 * imx-ssi.c  --  ALSA Soc Audio Layer
 *
 * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
 *
 * This code is based on code copyrighted by Freescale,
 * Liam Girdwood, Javier Martin and probably others.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *
 * The i.MX SSI core has some nasty limitations in AC97 mode. While most
 * sane processor vendors have a FIFO per AC97 slot, the i.MX has only
 * one FIFO which combines all valid receive slots. We cannot even select
 * which slots we want to receive. The WM9712 with which this driver
 * was developed with always sends GPIO status data in slot 12 which
 * we receive in our (PCM-) data stream. The only chance we have is to
 * manually skip this data in the FIQ handler. With sampling rates different
 * from 48000Hz not every frame has valid receive data, so the ratio
 * between pcm data and GPIO status data changes. Our FIQ handler is not
 * able to handle this, hence this driver only works with 48000Hz sampling
 * rate.
 * Reading and writing AC97 registers is another challenge. The core
 * provides us status bits when the read register is updated with *another*
 * value. When we read the same register two times (and the register still
 * contains the same value) these status bits are not set. We work
 * around this by not polling these bits but only wait a fixed delay.
 *
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

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

#include <linux/platform_data/asoc-imx-ssi.h>

#include "imx-ssi.h"
#include "fsl_utils.h"

#define SSI_SACNT_DEFAULT (SSI_SACNT_AC97EN | SSI_SACNT_FV)

/*
 * SSI Network Mode or TDM slots configuration.
 * Should only be called when port is inactive (i.e. SSIEN = 0).
 */
static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
	u32 sccr;

	sccr = readl(ssi->base + SSI_STCCR);
	sccr &= ~SSI_STCCR_DC_MASK;
	sccr |= SSI_STCCR_DC(slots - 1);
	writel(sccr, ssi->base + SSI_STCCR);

	sccr = readl(ssi->base + SSI_SRCCR);
	sccr &= ~SSI_STCCR_DC_MASK;
	sccr |= SSI_STCCR_DC(slots - 1);
	writel(sccr, ssi->base + SSI_SRCCR);

	writel(~tx_mask, ssi->base + SSI_STMSK);
	writel(~rx_mask, ssi->base + SSI_SRMSK);

	return 0;
}

/*
 * SSI DAI format configuration.
 * Should only be called when port is inactive (i.e. SSIEN = 0).
 */
static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
	u32 strcr = 0, scr;

	scr = readl(ssi->base + SSI_SCR) & ~(SSI_SCR_SYN | SSI_SCR_NET);

	/* DAI mode */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		/* data on rising edge of bclk, frame low 1clk before data */
		strcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0;
		scr |= SSI_SCR_NET;
		if (ssi->flags & IMX_SSI_USE_I2S_SLAVE) {
			scr &= ~SSI_I2S_MODE_MASK;
			scr |= SSI_SCR_I2S_MODE_SLAVE;
		}
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		/* data on rising edge of bclk, frame high with data */
		strcr |= SSI_STCR_TXBIT0;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		/* data on rising edge of bclk, frame high with data */
		strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		/* data on rising edge of bclk, frame high 1clk before data */
		strcr |= SSI_STCR_TFSL | SSI_STCR_TXBIT0 | SSI_STCR_TEFS;
		break;
	}

	/* DAI clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_IB_IF:
		strcr |= SSI_STCR_TFSI;
		strcr &= ~SSI_STCR_TSCKP;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		strcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI);
		break;
	case SND_SOC_DAIFMT_NB_IF:
		strcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP;
		break;
	case SND_SOC_DAIFMT_NB_NF:
		strcr &= ~SSI_STCR_TFSI;
		strcr |= SSI_STCR_TSCKP;
		break;
	}

	/* DAI clock master masks */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		break;
	default:
		/* Master mode not implemented, needs handling of clocks. */
		return -EINVAL;
	}

	strcr |= SSI_STCR_TFEN0;

	if (ssi->flags & IMX_SSI_NET)
		scr |= SSI_SCR_NET;
	if (ssi->flags & IMX_SSI_SYN)
		scr |= SSI_SCR_SYN;

	writel(strcr, ssi->base + SSI_STCR);
	writel(strcr, ssi->base + SSI_SRCR);
	writel(scr, ssi->base + SSI_SCR);

	return 0;
}

/*
 * SSI system clock configuration.
 * Should only be called when port is inactive (i.e. SSIEN = 0).
 */
static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
				  int clk_id, unsigned int freq, int dir)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
	u32 scr;

	scr = readl(ssi->base + SSI_SCR);

	switch (clk_id) {
	case IMX_SSP_SYS_CLK:
		if (dir == SND_SOC_CLOCK_OUT)
			scr |= SSI_SCR_SYS_CLK_EN;
		else
			scr &= ~SSI_SCR_SYS_CLK_EN;
		break;
	default:
		return -EINVAL;
	}

	writel(scr, ssi->base + SSI_SCR);

	return 0;
}

/*
 * SSI Clock dividers
 * Should only be called when port is inactive (i.e. SSIEN = 0).
 */
static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
				  int div_id, int div)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
	u32 stccr, srccr;

	stccr = readl(ssi->base + SSI_STCCR);
	srccr = readl(ssi->base + SSI_SRCCR);

	switch (div_id) {
	case IMX_SSI_TX_DIV_2:
		stccr &= ~SSI_STCCR_DIV2;
		stccr |= div;
		break;
	case IMX_SSI_TX_DIV_PSR:
		stccr &= ~SSI_STCCR_PSR;
		stccr |= div;
		break;
	case IMX_SSI_TX_DIV_PM:
		stccr &= ~0xff;
		stccr |= SSI_STCCR_PM(div);
		break;
	case IMX_SSI_RX_DIV_2:
		stccr &= ~SSI_STCCR_DIV2;
		stccr |= div;
		break;
	case IMX_SSI_RX_DIV_PSR:
		stccr &= ~SSI_STCCR_PSR;
		stccr |= div;
		break;
	case IMX_SSI_RX_DIV_PM:
		stccr &= ~0xff;
		stccr |= SSI_STCCR_PM(div);
		break;
	default:
		return -EINVAL;
	}

	writel(stccr, ssi->base + SSI_STCCR);
	writel(srccr, ssi->base + SSI_SRCCR);

	return 0;
}

/*
 * Should only be called when port is inactive (i.e. SSIEN = 0),
 * although can be called multiple times by upper layers.
 */
static int imx_ssi_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params,
			     struct snd_soc_dai *cpu_dai)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
	u32 reg, sccr;

	/* Tx/Rx config */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		reg = SSI_STCCR;
	else
		reg = SSI_SRCCR;

	if (ssi->flags & IMX_SSI_SYN)
		reg = SSI_STCCR;

	sccr = readl(ssi->base + reg) & ~SSI_STCCR_WL_MASK;

	/* DAI data (word) size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		sccr |= SSI_SRCCR_WL(16);
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		sccr |= SSI_SRCCR_WL(20);
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		sccr |= SSI_SRCCR_WL(24);
		break;
	}

	writel(sccr, ssi->base + reg);

	return 0;
}

static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
		struct snd_soc_dai *dai)
{
	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(dai);
	unsigned int sier_bits, sier;
	unsigned int scr;

	scr = readl(ssi->base + SSI_SCR);
	sier = readl(ssi->base + SSI_SIER);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (ssi->flags & IMX_SSI_DMA)
			sier_bits = SSI_SIER_TDMAE;
		else
			sier_bits = SSI_SIER_TIE | SSI_SIER_TFE0_EN;
	} else {
		if (ssi->flags & IMX_SSI_DMA)
			sier_bits = SSI_SIER_RDMAE;
		else
			sier_bits = SSI_SIER_RIE | SSI_SIER_RFF0_EN;
	}

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			scr |= SSI_SCR_TE;
		else
			scr |= SSI_SCR_RE;
		sier |= sier_bits;

		scr |= SSI_SCR_SSIEN;

		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
			scr &= ~SSI_SCR_TE;
		else
			scr &= ~SSI_SCR_RE;
		sier &= ~sier_bits;

		if (!(scr & (SSI_SCR_TE | SSI_SCR_RE)))
			scr &= ~SSI_SCR_SSIEN;

		break;
	default:
		return -EINVAL;
	}

	if (!(ssi->flags & IMX_SSI_USE_AC97))
		/* rx/tx are always enabled to access ac97 registers */
		writel(scr, ssi->base + SSI_SCR);

	writel(sier, ssi->base + SSI_SIER);

	return 0;
}

static const struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
	.hw_params	= imx_ssi_hw_params,
	.set_fmt	= imx_ssi_set_dai_fmt,
	.set_clkdiv	= imx_ssi_set_dai_clkdiv,
	.set_sysclk	= imx_ssi_set_dai_sysclk,
	.set_tdm_slot	= imx_ssi_set_dai_tdm_slot,
	.trigger	= imx_ssi_trigger,
};

static int imx_ssi_dai_probe(struct snd_soc_dai *dai)
{
	struct imx_ssi *ssi = dev_get_drvdata(dai->dev);
	uint32_t val;

	snd_soc_dai_set_drvdata(dai, ssi);

	val = SSI_SFCSR_TFWM0(ssi->dma_params_tx.maxburst) |
		SSI_SFCSR_RFWM0(ssi->dma_params_rx.maxburst);
	writel(val, ssi->base + SSI_SFCSR);

	/* Tx/Rx config */
	dai->playback_dma_data = &ssi->dma_params_tx;
	dai->capture_dma_data = &ssi->dma_params_rx;

	return 0;
}

static struct snd_soc_dai_driver imx_ssi_dai = {
	.probe = imx_ssi_dai_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &imx_ssi_pcm_dai_ops,
};

static struct snd_soc_dai_driver imx_ac97_dai = {
	.probe = imx_ssi_dai_probe,
	.bus_control = true,
	.playback = {
		.stream_name = "AC97 Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "AC97 Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &imx_ssi_pcm_dai_ops,
};

static const struct snd_soc_component_driver imx_component = {
	.name		= DRV_NAME,
};

static void setup_channel_to_ac97(struct imx_ssi *imx_ssi)
{
	void __iomem *base = imx_ssi->base;

	writel(0x0, base + SSI_SCR);
	writel(0x0, base + SSI_STCR);
	writel(0x0, base + SSI_SRCR);

	writel(SSI_SCR_SYN | SSI_SCR_NET, base + SSI_SCR);

	writel(SSI_SFCSR_RFWM0(8) |
		SSI_SFCSR_TFWM0(8) |
		SSI_SFCSR_RFWM1(8) |
		SSI_SFCSR_TFWM1(8), base + SSI_SFCSR);

	writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_STCCR);
	writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_SRCCR);

	writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN, base + SSI_SCR);
	writel(SSI_SOR_WAIT(3), base + SSI_SOR);

	writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN |
			SSI_SCR_TE | SSI_SCR_RE,
			base + SSI_SCR);

	writel(SSI_SACNT_DEFAULT, base + SSI_SACNT);
	writel(0xff, base + SSI_SACCDIS);
	writel(0x300, base + SSI_SACCEN);
}

static struct imx_ssi *ac97_ssi;

static void imx_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
		unsigned short val)
{
	struct imx_ssi *imx_ssi = ac97_ssi;
	void __iomem *base = imx_ssi->base;
	unsigned int lreg;
	unsigned int lval;

	if (reg > 0x7f)
		return;

	pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);

	lreg = reg <<  12;
	writel(lreg, base + SSI_SACADD);

	lval = val << 4;
	writel(lval , base + SSI_SACDAT);

	writel(SSI_SACNT_DEFAULT | SSI_SACNT_WR, base + SSI_SACNT);
	udelay(100);
}

static unsigned short imx_ssi_ac97_read(struct snd_ac97 *ac97,
		unsigned short reg)
{
	struct imx_ssi *imx_ssi = ac97_ssi;
	void __iomem *base = imx_ssi->base;

	unsigned short val = -1;
	unsigned int lreg;

	lreg = (reg & 0x7f) <<  12 ;
	writel(lreg, base + SSI_SACADD);
	writel(SSI_SACNT_DEFAULT | SSI_SACNT_RD, base + SSI_SACNT);

	udelay(100);

	val = (readl(base + SSI_SACDAT) >> 4) & 0xffff;

	pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);

	return val;
}

static void imx_ssi_ac97_reset(struct snd_ac97 *ac97)
{
	struct imx_ssi *imx_ssi = ac97_ssi;

	if (imx_ssi->ac97_reset)
		imx_ssi->ac97_reset(ac97);
	/* First read sometimes fails, do a dummy read */
	imx_ssi_ac97_read(ac97, 0);
}

static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97)
{
	struct imx_ssi *imx_ssi = ac97_ssi;

	if (imx_ssi->ac97_warm_reset)
		imx_ssi->ac97_warm_reset(ac97);

	/* First read sometimes fails, do a dummy read */
	imx_ssi_ac97_read(ac97, 0);
}

static struct snd_ac97_bus_ops imx_ssi_ac97_ops = {
	.read		= imx_ssi_ac97_read,
	.write		= imx_ssi_ac97_write,
	.reset		= imx_ssi_ac97_reset,
	.warm_reset	= imx_ssi_ac97_warm_reset
};

static int imx_ssi_probe(struct platform_device *pdev)
{
	struct resource *res;
	struct imx_ssi *ssi;
	struct imx_ssi_platform_data *pdata = pdev->dev.platform_data;
	int ret = 0;
	struct snd_soc_dai_driver *dai;

	ssi = devm_kzalloc(&pdev->dev, sizeof(*ssi), GFP_KERNEL);
	if (!ssi)
		return -ENOMEM;
	dev_set_drvdata(&pdev->dev, ssi);

	if (pdata) {
		ssi->ac97_reset = pdata->ac97_reset;
		ssi->ac97_warm_reset = pdata->ac97_warm_reset;
		ssi->flags = pdata->flags;
	}

	ssi->irq = platform_get_irq(pdev, 0);

	ssi->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(ssi->clk)) {
		ret = PTR_ERR(ssi->clk);
		dev_err(&pdev->dev, "Cannot get the clock: %d\n",
			ret);
		goto failed_clk;
	}
	ret = clk_prepare_enable(ssi->clk);
	if (ret)
		goto failed_clk;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	ssi->base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(ssi->base)) {
		ret = PTR_ERR(ssi->base);
		goto failed_register;
	}

	if (ssi->flags & IMX_SSI_USE_AC97) {
		if (ac97_ssi) {
			dev_err(&pdev->dev, "AC'97 SSI already registered\n");
			ret = -EBUSY;
			goto failed_register;
		}
		ac97_ssi = ssi;
		setup_channel_to_ac97(ssi);
		dai = &imx_ac97_dai;
	} else
		dai = &imx_ssi_dai;

	writel(0x0, ssi->base + SSI_SIER);

	ssi->dma_params_rx.addr = res->start + SSI_SRX0;
	ssi->dma_params_tx.addr = res->start + SSI_STX0;

	ssi->dma_params_tx.maxburst = 6;
	ssi->dma_params_rx.maxburst = 4;

	ssi->dma_params_tx.filter_data = &ssi->filter_data_tx;
	ssi->dma_params_rx.filter_data = &ssi->filter_data_rx;

	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx0");
	if (res) {
		imx_pcm_dma_params_init_data(&ssi->filter_data_tx, res->start,
			IMX_DMATYPE_SSI);
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx0");
	if (res) {
		imx_pcm_dma_params_init_data(&ssi->filter_data_rx, res->start,
			IMX_DMATYPE_SSI);
	}

	platform_set_drvdata(pdev, ssi);

	ret = snd_soc_set_ac97_ops(&imx_ssi_ac97_ops);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
		goto failed_register;
	}

	ret = snd_soc_register_component(&pdev->dev, &imx_component,
					 dai, 1);
	if (ret) {
		dev_err(&pdev->dev, "register DAI failed\n");
		goto failed_register;
	}

	ssi->fiq_params.irq = ssi->irq;
	ssi->fiq_params.base = ssi->base;
	ssi->fiq_params.dma_params_rx = &ssi->dma_params_rx;
	ssi->fiq_params.dma_params_tx = &ssi->dma_params_tx;

	ssi->fiq_init = imx_pcm_fiq_init(pdev, &ssi->fiq_params);
	ssi->dma_init = imx_pcm_dma_init(pdev, IMX_SSI_DMABUF_SIZE);

	if (ssi->fiq_init && ssi->dma_init) {
		ret = ssi->fiq_init;
		goto failed_pcm;
	}

	return 0;

failed_pcm:
	snd_soc_unregister_component(&pdev->dev);
failed_register:
	clk_disable_unprepare(ssi->clk);
failed_clk:
	snd_soc_set_ac97_ops(NULL);

	return ret;
}

static int imx_ssi_remove(struct platform_device *pdev)
{
	struct imx_ssi *ssi = platform_get_drvdata(pdev);

	if (!ssi->fiq_init)
		imx_pcm_fiq_exit(pdev);

	snd_soc_unregister_component(&pdev->dev);

	if (ssi->flags & IMX_SSI_USE_AC97)
		ac97_ssi = NULL;

	clk_disable_unprepare(ssi->clk);
	snd_soc_set_ac97_ops(NULL);

	return 0;
}

static struct platform_driver imx_ssi_driver = {
	.probe = imx_ssi_probe,
	.remove = imx_ssi_remove,

	.driver = {
		.name = "imx-ssi",
	},
};

module_platform_driver(imx_ssi_driver);

/* Module information */
MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:imx-ssi");
Commit	Line	Data
8380222e SH	1	/*
	2	* imx-ssi.c -- ALSA Soc Audio Layer
	3	*
	4	* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
	5	*
	6	* This code is based on code copyrighted by Freescale,
	7	* Liam Girdwood, Javier Martin and probably others.
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	*
	15	* The i.MX SSI core has some nasty limitations in AC97 mode. While most
	16	* sane processor vendors have a FIFO per AC97 slot, the i.MX has only
	17	* one FIFO which combines all valid receive slots. We cannot even select
	18	* which slots we want to receive. The WM9712 with which this driver
25985edc	19	* was developed with always sends GPIO status data in slot 12 which
8380222e SH	20	* we receive in our (PCM-) data stream. The only chance we have is to
	21	* manually skip this data in the FIQ handler. With sampling rates different
	22	* from 48000Hz not every frame has valid receive data, so the ratio
	23	* between pcm data and GPIO status data changes. Our FIQ handler is not
	24	* able to handle this, hence this driver only works with 48000Hz sampling
	25	* rate.
25d1fbfd	26	* Reading and writing AC97 registers is another challenge. The core
8380222e SH	27	* provides us status bits when the read register is updated with another
	28	* value. When we read the same register two times (and the register still
	29	* contains the same value) these status bits are not set. We work
	30	* around this by not polling these bits but only wait a fixed delay.
a23dc694	31	*
8380222e SH	32	*/
	33
	34	#include <linux/clk.h>
	35	#include <linux/delay.h>
	36	#include <linux/device.h>
	37	#include <linux/dma-mapping.h>
	38	#include <linux/init.h>
	39	#include <linux/interrupt.h>
	40	#include <linux/module.h>
	41	#include <linux/platform_device.h>
5a0e3ad6	42	#include <linux/slab.h>
8380222e SH	43
	44	#include <sound/core.h>
	45	#include <sound/initval.h>
	46	#include <sound/pcm.h>
	47	#include <sound/pcm_params.h>
	48	#include <sound/soc.h>
	49
82906b13	50	#include <linux/platform_data/asoc-imx-ssi.h>
8380222e SH	51
8380222e SH	52	#include "imx-ssi.h"
5f9e6ff6	53	#include "fsl_utils.h"
8380222e SH	54
	55	#define SSI_SACNT_DEFAULT (SSI_SACNT_AC97EN \| SSI_SACNT_FV)
	56
	57	/*
	58	* SSI Network Mode or TDM slots configuration.
	59	* Should only be called when port is inactive (i.e. SSIEN = 0).
	60	*/
	61	static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
	62	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
	63	{
f0fba2ad	64	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
8380222e SH	65	u32 sccr;
	66
	67	sccr = readl(ssi->base + SSI_STCCR);
	68	sccr &= ~SSI_STCCR_DC_MASK;
	69	sccr \|= SSI_STCCR_DC(slots - 1);
	70	writel(sccr, ssi->base + SSI_STCCR);
	71
	72	sccr = readl(ssi->base + SSI_SRCCR);
	73	sccr &= ~SSI_STCCR_DC_MASK;
	74	sccr \|= SSI_STCCR_DC(slots - 1);
	75	writel(sccr, ssi->base + SSI_SRCCR);
	76
d0077aaf LPC	77	writel(~tx_mask, ssi->base + SSI_STMSK);
d0077aaf LPC	78	writel(~rx_mask, ssi->base + SSI_SRMSK);
8380222e SH	79
	80	return 0;
	81	}
	82
	83	/*
	84	* SSI DAI format configuration.
	85	* Should only be called when port is inactive (i.e. SSIEN = 0).
8380222e SH	86	*/
	87	static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
	88	{
f0fba2ad	89	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
8380222e SH	90	u32 strcr = 0, scr;
	91
	92	scr = readl(ssi->base + SSI_SCR) & ~(SSI_SCR_SYN \| SSI_SCR_NET);
	93
	94	/* DAI mode */
	95	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	96	case SND_SOC_DAIFMT_I2S:
	97	/* data on rising edge of bclk, frame low 1clk before data */
	98	strcr \|= SSI_STCR_TFSI \| SSI_STCR_TEFS \| SSI_STCR_TXBIT0;
	99	scr \|= SSI_SCR_NET;
0e796120 EB	100	if (ssi->flags & IMX_SSI_USE_I2S_SLAVE) {
	101	scr &= ~SSI_I2S_MODE_MASK;
	102	scr \|= SSI_SCR_I2S_MODE_SLAVE;
	103	}
8380222e SH	104	break;
	105	case SND_SOC_DAIFMT_LEFT_J:
	106	/* data on rising edge of bclk, frame high with data */
	107	strcr \|= SSI_STCR_TXBIT0;
	108	break;
	109	case SND_SOC_DAIFMT_DSP_B:
	110	/* data on rising edge of bclk, frame high with data */
0a93421b	111	strcr \|= SSI_STCR_TFSL \| SSI_STCR_TXBIT0;
8380222e SH	112	break;
	113	case SND_SOC_DAIFMT_DSP_A:
	114	/* data on rising edge of bclk, frame high 1clk before data */
5ed80a75	115	strcr \|= SSI_STCR_TFSL \| SSI_STCR_TXBIT0 \| SSI_STCR_TEFS;
8380222e SH	116	break;
	117	}
	118
	119	/* DAI clock inversion */
	120	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	121	case SND_SOC_DAIFMT_IB_IF:
	122	strcr \|= SSI_STCR_TFSI;
	123	strcr &= ~SSI_STCR_TSCKP;
	124	break;
	125	case SND_SOC_DAIFMT_IB_NF:
	126	strcr &= ~(SSI_STCR_TSCKP \| SSI_STCR_TFSI);
	127	break;
	128	case SND_SOC_DAIFMT_NB_IF:
	129	strcr \|= SSI_STCR_TFSI \| SSI_STCR_TSCKP;
	130	break;
	131	case SND_SOC_DAIFMT_NB_NF:
	132	strcr &= ~SSI_STCR_TFSI;
	133	strcr \|= SSI_STCR_TSCKP;
	134	break;
	135	}
	136
	137	/* DAI clock master masks */
	138	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
d08a68bf	139	case SND_SOC_DAIFMT_CBM_CFM:
8380222e	140	break;
d08a68bf MB	141	default:
	142	/* Master mode not implemented, needs handling of clocks. */
	143	return -EINVAL;
8380222e SH	144	}
	145
	146	strcr \|= SSI_STCR_TFEN0;
	147
0e796120 EB	148	if (ssi->flags & IMX_SSI_NET)
	149	scr \|= SSI_SCR_NET;
	150	if (ssi->flags & IMX_SSI_SYN)
	151	scr \|= SSI_SCR_SYN;
	152
8380222e SH	153	writel(strcr, ssi->base + SSI_STCR);
	154	writel(strcr, ssi->base + SSI_SRCR);
	155	writel(scr, ssi->base + SSI_SCR);
	156
	157	return 0;
	158	}
	159
	160	/*
	161	* SSI system clock configuration.
	162	* Should only be called when port is inactive (i.e. SSIEN = 0).
	163	*/
	164	static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
	165	int clk_id, unsigned int freq, int dir)
	166	{
f0fba2ad	167	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
8380222e SH	168	u32 scr;
	169
	170	scr = readl(ssi->base + SSI_SCR);
	171
	172	switch (clk_id) {
	173	case IMX_SSP_SYS_CLK:
	174	if (dir == SND_SOC_CLOCK_OUT)
	175	scr \|= SSI_SCR_SYS_CLK_EN;
	176	else
	177	scr &= ~SSI_SCR_SYS_CLK_EN;
	178	break;
	179	default:
	180	return -EINVAL;
	181	}
	182
	183	writel(scr, ssi->base + SSI_SCR);
	184
	185	return 0;
	186	}
	187
	188	/*
	189	* SSI Clock dividers
	190	* Should only be called when port is inactive (i.e. SSIEN = 0).
	191	*/
	192	static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
	193	int div_id, int div)
	194	{
f0fba2ad	195	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
8380222e SH	196	u32 stccr, srccr;
	197
	198	stccr = readl(ssi->base + SSI_STCCR);
	199	srccr = readl(ssi->base + SSI_SRCCR);
	200
	201	switch (div_id) {
	202	case IMX_SSI_TX_DIV_2:
	203	stccr &= ~SSI_STCCR_DIV2;
	204	stccr \|= div;
	205	break;
	206	case IMX_SSI_TX_DIV_PSR:
	207	stccr &= ~SSI_STCCR_PSR;
	208	stccr \|= div;
	209	break;
	210	case IMX_SSI_TX_DIV_PM:
	211	stccr &= ~0xff;
	212	stccr \|= SSI_STCCR_PM(div);
	213	break;
	214	case IMX_SSI_RX_DIV_2:
	215	stccr &= ~SSI_STCCR_DIV2;
	216	stccr \|= div;
	217	break;
	218	case IMX_SSI_RX_DIV_PSR:
	219	stccr &= ~SSI_STCCR_PSR;
	220	stccr \|= div;
	221	break;
	222	case IMX_SSI_RX_DIV_PM:
	223	stccr &= ~0xff;
	224	stccr \|= SSI_STCCR_PM(div);
	225	break;
	226	default:
	227	return -EINVAL;
	228	}
	229
	230	writel(stccr, ssi->base + SSI_STCCR);
	231	writel(srccr, ssi->base + SSI_SRCCR);
	232
	233	return 0;
	234	}
	235
	236	/*
	237	* Should only be called when port is inactive (i.e. SSIEN = 0),
	238	* although can be called multiple times by upper layers.
	239	*/
	240	static int imx_ssi_hw_params(struct snd_pcm_substream *substream,
	241	struct snd_pcm_hw_params *params,
	242	struct snd_soc_dai *cpu_dai)
	243	{
f0fba2ad	244	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(cpu_dai);
8380222e SH	245	u32 reg, sccr;
	246
	247	/* Tx/Rx config */
91a38540	248	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
8380222e	249	reg = SSI_STCCR;
91a38540	250	else
8380222e	251	reg = SSI_SRCCR;
8380222e	252
70bf043b SH	253	if (ssi->flags & IMX_SSI_SYN)
	254	reg = SSI_STCCR;
	255
8380222e SH	256	sccr = readl(ssi->base + reg) & ~SSI_STCCR_WL_MASK;
	257
	258	/* DAI data (word) size */
	259	switch (params_format(params)) {
	260	case SNDRV_PCM_FORMAT_S16_LE:
	261	sccr \|= SSI_SRCCR_WL(16);
	262	break;
	263	case SNDRV_PCM_FORMAT_S20_3LE:
	264	sccr \|= SSI_SRCCR_WL(20);
	265	break;
	266	case SNDRV_PCM_FORMAT_S24_LE:
	267	sccr \|= SSI_SRCCR_WL(24);
	268	break;
	269	}
	270
	271	writel(sccr, ssi->base + reg);
	272
	273	return 0;
	274	}
	275
	276	static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
	277	struct snd_soc_dai *dai)
	278	{
f0fba2ad	279	struct imx_ssi *ssi = snd_soc_dai_get_drvdata(dai);
8380222e SH	280	unsigned int sier_bits, sier;
	281	unsigned int scr;
	282
	283	scr = readl(ssi->base + SSI_SCR);
	284	sier = readl(ssi->base + SSI_SIER);
	285
	286	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	287	if (ssi->flags & IMX_SSI_DMA)
	288	sier_bits = SSI_SIER_TDMAE;
	289	else
	290	sier_bits = SSI_SIER_TIE \| SSI_SIER_TFE0_EN;
	291	} else {
	292	if (ssi->flags & IMX_SSI_DMA)
	293	sier_bits = SSI_SIER_RDMAE;
	294	else
	295	sier_bits = SSI_SIER_RIE \| SSI_SIER_RFF0_EN;
	296	}
	297
	298	switch (cmd) {
	299	case SNDRV_PCM_TRIGGER_START:
	300	case SNDRV_PCM_TRIGGER_RESUME:
	301	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	302	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	303	scr \|= SSI_SCR_TE;
	304	else
	305	scr \|= SSI_SCR_RE;
	306	sier \|= sier_bits;
	307
3621dbbc	308	scr \|= SSI_SCR_SSIEN;
8380222e SH	309
	310	break;
	311
	312	case SNDRV_PCM_TRIGGER_STOP:
	313	case SNDRV_PCM_TRIGGER_SUSPEND:
	314	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	315	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	316	scr &= ~SSI_SCR_TE;
	317	else
	318	scr &= ~SSI_SCR_RE;
	319	sier &= ~sier_bits;
	320
3621dbbc	321	if (!(scr & (SSI_SCR_TE \| SSI_SCR_RE)))
8380222e SH	322	scr &= ~SSI_SCR_SSIEN;
	323
	324	break;
	325	default:
	326	return -EINVAL;
	327	}
	328
	329	if (!(ssi->flags & IMX_SSI_USE_AC97))
	330	/* rx/tx are always enabled to access ac97 registers */
	331	writel(scr, ssi->base + SSI_SCR);
	332
	333	writel(sier, ssi->base + SSI_SIER);
	334
	335	return 0;
	336	}
	337
85e7652d	338	static const struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
8380222e SH	339	.hw_params = imx_ssi_hw_params,
	340	.set_fmt = imx_ssi_set_dai_fmt,
	341	.set_clkdiv = imx_ssi_set_dai_clkdiv,
	342	.set_sysclk = imx_ssi_set_dai_sysclk,
	343	.set_tdm_slot = imx_ssi_set_dai_tdm_slot,
	344	.trigger = imx_ssi_trigger,
	345	};
	346
f562be51 SH	347	static int imx_ssi_dai_probe(struct snd_soc_dai *dai)
	348	{
	349	struct imx_ssi *ssi = dev_get_drvdata(dai->dev);
	350	uint32_t val;
	351
	352	snd_soc_dai_set_drvdata(dai, ssi);
	353
a8909c9b LPC	354	val = SSI_SFCSR_TFWM0(ssi->dma_params_tx.maxburst) \|
a8909c9b LPC	355	SSI_SFCSR_RFWM0(ssi->dma_params_rx.maxburst);
f562be51 SH	356	writel(val, ssi->base + SSI_SFCSR);
f562be51 SH	357
fc8ba7f9 LPC	358	/* Tx/Rx config */
	359	dai->playback_dma_data = &ssi->dma_params_tx;
	360	dai->capture_dma_data = &ssi->dma_params_rx;
	361
f562be51 SH	362	return 0;
	363	}
	364
f0fba2ad	365	static struct snd_soc_dai_driver imx_ssi_dai = {
f562be51	366	.probe = imx_ssi_dai_probe,
f0fba2ad	367	.playback = {
104c2299	368	.channels_min = 1,
f0fba2ad LG	369	.channels_max = 2,
	370	.rates = SNDRV_PCM_RATE_8000_96000,
	371	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	372	},
	373	.capture = {
104c2299	374	.channels_min = 1,
f0fba2ad LG	375	.channels_max = 2,
	376	.rates = SNDRV_PCM_RATE_8000_96000,
	377	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	378	},
	379	.ops = &imx_ssi_pcm_dai_ops,
8380222e	380	};
8380222e	381
f0fba2ad LG	382	static struct snd_soc_dai_driver imx_ac97_dai = {
f0fba2ad LG	383	.probe = imx_ssi_dai_probe,
bc263214	384	.bus_control = true,
8380222e SH	385	.playback = {
	386	.stream_name = "AC97 Playback",
	387	.channels_min = 2,
	388	.channels_max = 2,
c1963c37	389	.rates = SNDRV_PCM_RATE_8000_48000,
8380222e SH	390	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	391	},
	392	.capture = {
	393	.stream_name = "AC97 Capture",
	394	.channels_min = 2,
	395	.channels_max = 2,
	396	.rates = SNDRV_PCM_RATE_48000,
	397	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	398	},
	399	.ops = &imx_ssi_pcm_dai_ops,
	400	};
	401
c22fd5ef KM	402	static const struct snd_soc_component_driver imx_component = {
	403	.name = DRV_NAME,
	404	};
	405
8380222e SH	406	static void setup_channel_to_ac97(struct imx_ssi *imx_ssi)
	407	{
	408	void __iomem *base = imx_ssi->base;
	409
	410	writel(0x0, base + SSI_SCR);
	411	writel(0x0, base + SSI_STCR);
	412	writel(0x0, base + SSI_SRCR);
	413
	414	writel(SSI_SCR_SYN \| SSI_SCR_NET, base + SSI_SCR);
	415
	416	writel(SSI_SFCSR_RFWM0(8) \|
	417	SSI_SFCSR_TFWM0(8) \|
	418	SSI_SFCSR_RFWM1(8) \|
	419	SSI_SFCSR_TFWM1(8), base + SSI_SFCSR);
	420
	421	writel(SSI_STCCR_WL(16) \| SSI_STCCR_DC(12), base + SSI_STCCR);
	422	writel(SSI_STCCR_WL(16) \| SSI_STCCR_DC(12), base + SSI_SRCCR);
	423
	424	writel(SSI_SCR_SYN \| SSI_SCR_NET \| SSI_SCR_SSIEN, base + SSI_SCR);
	425	writel(SSI_SOR_WAIT(3), base + SSI_SOR);
	426
	427	writel(SSI_SCR_SYN \| SSI_SCR_NET \| SSI_SCR_SSIEN \|
	428	SSI_SCR_TE \| SSI_SCR_RE,
	429	base + SSI_SCR);
	430
	431	writel(SSI_SACNT_DEFAULT, base + SSI_SACNT);
	432	writel(0xff, base + SSI_SACCDIS);
	433	writel(0x300, base + SSI_SACCEN);
	434	}
	435
	436	static struct imx_ssi *ac97_ssi;
	437
	438	static void imx_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
	439	unsigned short val)
	440	{
	441	struct imx_ssi *imx_ssi = ac97_ssi;
	442	void __iomem *base = imx_ssi->base;
	443	unsigned int lreg;
	444	unsigned int lval;
	445
	446	if (reg > 0x7f)
	447	return;
	448
	449	pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);
	450
	451	lreg = reg << 12;
	452	writel(lreg, base + SSI_SACADD);
	453
	454	lval = val << 4;
	455	writel(lval , base + SSI_SACDAT);
	456
	457	writel(SSI_SACNT_DEFAULT \| SSI_SACNT_WR, base + SSI_SACNT);
	458	udelay(100);
	459	}
	460
	461	static unsigned short imx_ssi_ac97_read(struct snd_ac97 *ac97,
	462	unsigned short reg)
	463	{
	464	struct imx_ssi *imx_ssi = ac97_ssi;
	465	void __iomem *base = imx_ssi->base;
	466
	467	unsigned short val = -1;
	468	unsigned int lreg;
	469
470	lreg = (reg & 0x7f) << 12 ;
471	writel(lreg, base + SSI_SACADD);
472	writel(SSI_SACNT_DEFAULT \| SSI_SACNT_RD, base + SSI_SACNT);
473
474	udelay(100);
475
476	val = (readl(base + SSI_SACDAT) >> 4) & 0xffff;
477
478	pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);
479
480	return val;
481	}
482
483	static void imx_ssi_ac97_reset(struct snd_ac97 *ac97)
484	{
485	struct imx_ssi *imx_ssi = ac97_ssi;
486
487	if (imx_ssi->ac97_reset)
488	imx_ssi->ac97_reset(ac97);
b6e51600 SH	489	/* First read sometimes fails, do a dummy read */
b6e51600 SH	490	imx_ssi_ac97_read(ac97, 0);
8380222e SH	491	}
	492
	493	static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97)
	494	{
	495	struct imx_ssi *imx_ssi = ac97_ssi;
	496
	497	if (imx_ssi->ac97_warm_reset)
	498	imx_ssi->ac97_warm_reset(ac97);
b6e51600 SH	499
	500	/* First read sometimes fails, do a dummy read */
	501	imx_ssi_ac97_read(ac97, 0);
8380222e SH	502	}
8380222e SH	503
b047e1cc	504	static struct snd_ac97_bus_ops imx_ssi_ac97_ops = {
8380222e SH	505	.read = imx_ssi_ac97_read,
	506	.write = imx_ssi_ac97_write,
	507	.reset = imx_ssi_ac97_reset,
	508	.warm_reset = imx_ssi_ac97_warm_reset
	509	};
8380222e	510
8380222e SH	511	static int imx_ssi_probe(struct platform_device *pdev)
	512	{
	513	struct resource *res;
	514	struct imx_ssi *ssi;
	515	struct imx_ssi_platform_data *pdata = pdev->dev.platform_data;
8380222e	516	int ret = 0;
f0fba2ad	517	struct snd_soc_dai_driver *dai;
8380222e	518
ad3ab1bb	519	ssi = devm_kzalloc(&pdev->dev, sizeof(*ssi), GFP_KERNEL);
8380222e SH	520	if (!ssi)
8380222e SH	521	return -ENOMEM;
f0fba2ad	522	dev_set_drvdata(&pdev->dev, ssi);
8380222e SH	523
	524	if (pdata) {
	525	ssi->ac97_reset = pdata->ac97_reset;
	526	ssi->ac97_warm_reset = pdata->ac97_warm_reset;
	527	ssi->flags = pdata->flags;
	528	}
	529
8380222e SH	530	ssi->irq = platform_get_irq(pdev, 0);
8380222e SH	531
ad3ab1bb	532	ssi->clk = devm_clk_get(&pdev->dev, NULL);
8380222e SH	533	if (IS_ERR(ssi->clk)) {
	534	ret = PTR_ERR(ssi->clk);
	535	dev_err(&pdev->dev, "Cannot get the clock: %d\n",
	536	ret);
	537	goto failed_clk;
	538	}
24f4bd57 FE	539	ret = clk_prepare_enable(ssi->clk);
	540	if (ret)
	541	goto failed_clk;
8380222e SH	542
8380222e SH	543	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
b25b5aa0 TR	544	ssi->base = devm_ioremap_resource(&pdev->dev, res);
	545	if (IS_ERR(ssi->base)) {
	546	ret = PTR_ERR(ssi->base);
ad3ab1bb	547	goto failed_register;
8380222e SH	548	}
	549
	550	if (ssi->flags & IMX_SSI_USE_AC97) {
	551	if (ac97_ssi) {
a0f1e98b	552	dev_err(&pdev->dev, "AC'97 SSI already registered\n");
8380222e	553	ret = -EBUSY;
ad3ab1bb	554	goto failed_register;
8380222e SH	555	}
	556	ac97_ssi = ssi;
	557	setup_channel_to_ac97(ssi);
f0fba2ad	558	dai = &imx_ac97_dai;
8380222e	559	} else
f0fba2ad	560	dai = &imx_ssi_dai;
8380222e SH	561
	562	writel(0x0, ssi->base + SSI_SIER);
	563
a8909c9b LPC	564	ssi->dma_params_rx.addr = res->start + SSI_SRX0;
a8909c9b LPC	565	ssi->dma_params_tx.addr = res->start + SSI_STX0;
8380222e	566
a8909c9b LPC	567	ssi->dma_params_tx.maxburst = 6;
	568	ssi->dma_params_rx.maxburst = 4;
	569
	570	ssi->dma_params_tx.filter_data = &ssi->filter_data_tx;
	571	ssi->dma_params_rx.filter_data = &ssi->filter_data_rx;
0a93421b	572
8380222e	573	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx0");
312bb4f6	574	if (res) {
a8909c9b	575	imx_pcm_dma_params_init_data(&ssi->filter_data_tx, res->start,
32bd8cd2	576	IMX_DMATYPE_SSI);
312bb4f6	577	}
8380222e SH	578
8380222e SH	579	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx0");
312bb4f6	580	if (res) {
a8909c9b	581	imx_pcm_dma_params_init_data(&ssi->filter_data_rx, res->start,
32bd8cd2	582	IMX_DMATYPE_SSI);
312bb4f6	583	}
8380222e	584
f0fba2ad	585	platform_set_drvdata(pdev, ssi);
8380222e	586
b047e1cc MB	587	ret = snd_soc_set_ac97_ops(&imx_ssi_ac97_ops);
	588	if (ret != 0) {
	589	dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
	590	goto failed_register;
	591	}
	592
c22fd5ef KM	593	ret = snd_soc_register_component(&pdev->dev, &imx_component,
c22fd5ef KM	594	dai, 1);
8380222e SH	595	if (ret) {
	596	dev_err(&pdev->dev, "register DAI failed\n");
	597	goto failed_register;
	598	}
	599
9051cba1 MP	600	ssi->fiq_params.irq = ssi->irq;
	601	ssi->fiq_params.base = ssi->base;
	602	ssi->fiq_params.dma_params_rx = &ssi->dma_params_rx;
	603	ssi->fiq_params.dma_params_tx = &ssi->dma_params_tx;
	604
5a6e19be	605	ssi->fiq_init = imx_pcm_fiq_init(pdev, &ssi->fiq_params);
0d69e0dd	606	ssi->dma_init = imx_pcm_dma_init(pdev, IMX_SSI_DMABUF_SIZE);
f562be51	607
5a6e19be PR	608	if (ssi->fiq_init && ssi->dma_init) {
	609	ret = ssi->fiq_init;
	610	goto failed_pcm;
	611	}
8380222e SH	612
	613	return 0;
	614
5a6e19be	615	failed_pcm:
c22fd5ef	616	snd_soc_unregister_component(&pdev->dev);
8380222e	617	failed_register:
41c73b6e	618	clk_disable_unprepare(ssi->clk);
8380222e	619	failed_clk:
b047e1cc	620	snd_soc_set_ac97_ops(NULL);
8380222e SH	621
	622	return ret;
	623	}
	624
a0a3d518	625	static int imx_ssi_remove(struct platform_device *pdev)
8380222e	626	{
8380222e SH	627	struct imx_ssi *ssi = platform_get_drvdata(pdev);
8380222e SH	628
5a6e19be PR	629	if (!ssi->fiq_init)
5a6e19be PR	630	imx_pcm_fiq_exit(pdev);
f0fba2ad	631
c22fd5ef	632	snd_soc_unregister_component(&pdev->dev);
8380222e SH	633
	634	if (ssi->flags & IMX_SSI_USE_AC97)
	635	ac97_ssi = NULL;
	636
41c73b6e	637	clk_disable_unprepare(ssi->clk);
b047e1cc	638	snd_soc_set_ac97_ops(NULL);
8380222e SH	639
	640	return 0;
	641	}
	642
	643	static struct platform_driver imx_ssi_driver = {
	644	.probe = imx_ssi_probe,
a0a3d518	645	.remove = imx_ssi_remove,
8380222e SH	646
8380222e SH	647	.driver = {
205d231b	648	.name = "imx-ssi",
8380222e SH	649	},
	650	};
	651
7a24b2ba	652	module_platform_driver(imx_ssi_driver);
8380222e SH	653
	654	/* Module information */
	655	MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>");
	656	MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface");
	657	MODULE_LICENSE("GPL");
96dcabb9	658	MODULE_ALIAS("platform:imx-ssi");