[mirror_ubuntu-bionic-kernel.git] / sound / soc / spear / spdif_out.c

/*
 * ALSA SoC SPDIF Out Audio Layer for spear processors
 *
 * Copyright (C) 2012 ST Microelectronics
 * Vipin Kumar <vipin.kumar@st.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/soc.h>
#include <sound/spear_dma.h>
#include <sound/spear_spdif.h>
#include "spdif_out_regs.h"

struct spdif_out_params {
	u32 rate;
	u32 core_freq;
	u32 mute;
};

struct spdif_out_dev {
	struct clk *clk;
	struct spear_dma_data dma_params;
	struct spdif_out_params saved_params;
	u32 running;
	void __iomem *io_base;
};

static void spdif_out_configure(struct spdif_out_dev *host)
{
	writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
	mdelay(1);
	writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
			host->io_base + SPDIF_OUT_SOFT_RST);

	writel(SPDIF_OUT_FDMA_TRIG_16 | SPDIF_OUT_MEMFMT_16_16 |
			SPDIF_OUT_VALID_HW | SPDIF_OUT_USER_HW |
			SPDIF_OUT_CHNLSTA_HW | SPDIF_OUT_PARITY_HW,
			host->io_base + SPDIF_OUT_CFG);

	writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
	writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
}

static int spdif_out_startup(struct snd_pcm_substream *substream,
		struct snd_soc_dai *cpu_dai)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
	int ret;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
		return -EINVAL;

	ret = clk_enable(host->clk);
	if (ret)
		return ret;

	host->running = true;
	spdif_out_configure(host);

	return 0;
}

static void spdif_out_shutdown(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
		return;

	clk_disable(host->clk);
	host->running = false;
}

static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
		u32 rate)
{
	u32 divider, ctrl;

	clk_set_rate(host->clk, core_freq);
	divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));

	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
	ctrl &= ~SPDIF_DIVIDER_MASK;
	ctrl |= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
}

static int spdif_out_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params,
		struct snd_soc_dai *dai)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 rate, core_freq;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
		return -EINVAL;

	rate = params_rate(params);

	switch (rate) {
	case 8000:
	case 16000:
	case 32000:
	case 64000:
		/*
		 * The clock is multiplied by 10 to bring it to feasible range
		 * of frequencies for sscg
		 */
		core_freq = 64000 * 128 * 10;	/* 81.92 MHz */
		break;
	case 5512:
	case 11025:
	case 22050:
	case 44100:
	case 88200:
	case 176400:
		core_freq = 176400 * 128;	/* 22.5792 MHz */
		break;
	case 48000:
	case 96000:
	case 192000:
	default:
		core_freq = 192000 * 128;	/* 24.576 MHz */
		break;
	}

	spdif_out_clock(host, core_freq, rate);
	host->saved_params.core_freq = core_freq;
	host->saved_params.rate = rate;

	return 0;
}

static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
		struct snd_soc_dai *dai)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 ctrl;
	int ret = 0;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
		return -EINVAL;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
			ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
			ctrl &= ~SPDIF_OPMODE_MASK;
			if (!host->saved_params.mute)
				ctrl |= SPDIF_OPMODE_AUD_DATA |
					SPDIF_STATE_NORMAL;
			else
				ctrl |= SPDIF_OPMODE_MUTE_PCM;
			writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
		ctrl &= ~SPDIF_OPMODE_MASK;
		ctrl |= SPDIF_OPMODE_OFF;
		writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
		break;

	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	u32 val;

	host->saved_params.mute = mute;
	val = readl(host->io_base + SPDIF_OUT_CTRL);
	val &= ~SPDIF_OPMODE_MASK;

	if (mute)
		val |= SPDIF_OPMODE_MUTE_PCM;
	else {
		if (host->running)
			val |= SPDIF_OPMODE_AUD_DATA | SPDIF_STATE_NORMAL;
		else
			val |= SPDIF_OPMODE_OFF;
	}

	writel(val, host->io_base + SPDIF_OUT_CTRL);
	return 0;
}

static int spdif_mute_get(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct snd_soc_card *card = codec->card;
	struct snd_soc_pcm_runtime *rtd = card->rtd;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	ucontrol->value.integer.value[0] = host->saved_params.mute;
	return 0;
}

static int spdif_mute_put(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct snd_soc_card *card = codec->card;
	struct snd_soc_pcm_runtime *rtd = card->rtd;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);

	if (host->saved_params.mute == ucontrol->value.integer.value[0])
		return 0;

	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);

	return 1;
}
static const struct snd_kcontrol_new spdif_out_controls[] = {
	SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
			spdif_mute_get, spdif_mute_put),
};

static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
{
	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);

	dai->playback_dma_data = &host->dma_params;

	return snd_soc_add_dai_controls(dai, spdif_out_controls,
				ARRAY_SIZE(spdif_out_controls));
}

static const struct snd_soc_dai_ops spdif_out_dai_ops = {
	.digital_mute	= spdif_digital_mute,
	.startup	= spdif_out_startup,
	.shutdown	= spdif_out_shutdown,
	.trigger	= spdif_out_trigger,
	.hw_params	= spdif_out_hw_params,
};

static struct snd_soc_dai_driver spdif_out_dai = {
	.playback = {
		.channels_min = 2,
		.channels_max = 2,
		.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
				 SNDRV_PCM_RATE_192000),
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.probe = spdif_soc_dai_probe,
	.ops = &spdif_out_dai_ops,
};

static const struct snd_soc_component_driver spdif_out_component = {
	.name		= "spdif-out",
};

static int spdif_out_probe(struct platform_device *pdev)
{
	struct spdif_out_dev *host;
	struct spear_spdif_platform_data *pdata;
	struct resource *res;

	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
	if (!host) {
		dev_warn(&pdev->dev, "kzalloc fail\n");
		return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	host->io_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(host->io_base))
		return PTR_ERR(host->io_base);

	host->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(host->clk))
		return PTR_ERR(host->clk);

	pdata = dev_get_platdata(&pdev->dev);

	host->dma_params.data = pdata->dma_params;
	host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
	host->dma_params.max_burst = 16;
	host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	host->dma_params.filter = pdata->filter;

	dev_set_drvdata(&pdev->dev, host);

	return devm_snd_soc_register_component(&pdev->dev, &spdif_out_component,
					       &spdif_out_dai, 1);
}

#ifdef CONFIG_PM
static int spdif_out_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

	if (host->running)
		clk_disable(host->clk);

	return 0;
}

static int spdif_out_resume(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);

	if (host->running) {
		clk_enable(host->clk);
		spdif_out_configure(host);
		spdif_out_clock(host, host->saved_params.core_freq,
				host->saved_params.rate);
	}
	return 0;
}

static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
		spdif_out_resume);

#define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)

#else
#define SPDIF_OUT_DEV_PM_OPS NULL

#endif

static struct platform_driver spdif_out_driver = {
	.probe		= spdif_out_probe,
	.driver		= {
		.name	= "spdif-out",
		.owner	= THIS_MODULE,
		.pm	= SPDIF_OUT_DEV_PM_OPS,
	},
};

module_platform_driver(spdif_out_driver);

MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:spdif_out");
Commit	Line	Data
e584f9b4 VK	1	/*
	2	* ALSA SoC SPDIF Out Audio Layer for spear processors
	3	*
	4	* Copyright (C) 2012 ST Microelectronics
	5	* Vipin Kumar <vipin.kumar@st.com>
	6	*
	7	* This file is licensed under the terms of the GNU General Public
	8	* License version 2. This program is licensed "as is" without any
	9	* warranty of any kind, whether express or implied.
	10	*/
	11
	12	#include <linux/clk.h>
	13	#include <linux/delay.h>
	14	#include <linux/device.h>
	15	#include <linux/kernel.h>
	16	#include <linux/init.h>
	17	#include <linux/io.h>
	18	#include <linux/ioport.h>
	19	#include <linux/module.h>
	20	#include <linux/platform_device.h>
	21	#include <sound/soc.h>
	22	#include <sound/spear_dma.h>
	23	#include <sound/spear_spdif.h>
	24	#include "spdif_out_regs.h"
	25
	26	struct spdif_out_params {
	27	u32 rate;
	28	u32 core_freq;
	29	u32 mute;
	30	};
	31
	32	struct spdif_out_dev {
	33	struct clk *clk;
	34	struct spear_dma_data dma_params;
	35	struct spdif_out_params saved_params;
	36	u32 running;
	37	void __iomem *io_base;
	38	};
	39
	40	static void spdif_out_configure(struct spdif_out_dev *host)
	41	{
	42	writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
	43	mdelay(1);
	44	writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
	45	host->io_base + SPDIF_OUT_SOFT_RST);
	46
	47	writel(SPDIF_OUT_FDMA_TRIG_16 \| SPDIF_OUT_MEMFMT_16_16 \|
	48	SPDIF_OUT_VALID_HW \| SPDIF_OUT_USER_HW \|
	49	SPDIF_OUT_CHNLSTA_HW \| SPDIF_OUT_PARITY_HW,
	50	host->io_base + SPDIF_OUT_CFG);
	51
	52	writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
	53	writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
	54	}
	55
	56	static int spdif_out_startup(struct snd_pcm_substream *substream,
	57	struct snd_soc_dai *cpu_dai)
	58	{
	59	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
	60	int ret;
	61
	62	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	63	return -EINVAL;
	64
e584f9b4 VK	65	ret = clk_enable(host->clk);
	66	if (ret)
	67	return ret;
	68
	69	host->running = true;
	70	spdif_out_configure(host);
	71
	72	return 0;
	73	}
	74
	75	static void spdif_out_shutdown(struct snd_pcm_substream *substream,
	76	struct snd_soc_dai *dai)
	77	{
	78	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	79
	80	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	81	return;
	82
	83	clk_disable(host->clk);
	84	host->running = false;
e584f9b4 VK	85	}
	86
	87	static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
	88	u32 rate)
	89	{
	90	u32 divider, ctrl;
	91
	92	clk_set_rate(host->clk, core_freq);
	93	divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));
	94
	95	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
	96	ctrl &= ~SPDIF_DIVIDER_MASK;
	97	ctrl \|= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
	98	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
	99	}
	100
	101	static int spdif_out_hw_params(struct snd_pcm_substream *substream,
	102	struct snd_pcm_hw_params *params,
	103	struct snd_soc_dai *dai)
	104	{
	105	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	106	u32 rate, core_freq;
	107
	108	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
	109	return -EINVAL;
	110
	111	rate = params_rate(params);
	112
	113	switch (rate) {
	114	case 8000:
	115	case 16000:
	116	case 32000:
	117	case 64000:
	118	/*
	119	* The clock is multiplied by 10 to bring it to feasible range
	120	* of frequencies for sscg
	121	*/
	122	core_freq = 64000 * 128 * 10; /* 81.92 MHz */
	123	break;
	124	case 5512:
	125	case 11025:
	126	case 22050:
	127	case 44100:
	128	case 88200:
	129	case 176400:
	130	core_freq = 176400 * 128; /* 22.5792 MHz */
	131	break;
	132	case 48000:
	133	case 96000:
	134	case 192000:
	135	default:
	136	core_freq = 192000 * 128; /* 24.576 MHz */
	137	break;
	138	}
	139
	140	spdif_out_clock(host, core_freq, rate);
	141	host->saved_params.core_freq = core_freq;
	142	host->saved_params.rate = rate;
	143
	144	return 0;
	145	}
	146
	147	static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
	148	struct snd_soc_dai *dai)
149	{
150	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
151	u32 ctrl;
152	int ret = 0;
153
154	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
155	return -EINVAL;
156
157	switch (cmd) {
158	case SNDRV_PCM_TRIGGER_START:
159	case SNDRV_PCM_TRIGGER_RESUME:
160	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
161	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
162	ctrl &= ~SPDIF_OPMODE_MASK;
163	if (!host->saved_params.mute)
164	ctrl \|= SPDIF_OPMODE_AUD_DATA \|
165	SPDIF_STATE_NORMAL;
166	else
167	ctrl \|= SPDIF_OPMODE_MUTE_PCM;
168	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
169	break;
170
171	case SNDRV_PCM_TRIGGER_STOP:
172	case SNDRV_PCM_TRIGGER_SUSPEND:
173	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
174	ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
175	ctrl &= ~SPDIF_OPMODE_MASK;
176	ctrl \|= SPDIF_OPMODE_OFF;
177	writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
178	break;
179
180	default:
181	ret = -EINVAL;
182	break;
183	}
184	return ret;
185	}
186
187	static int spdif_digital_mute(struct snd_soc_dai *dai, int mute)
188	{
189	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
190	u32 val;
191
192	host->saved_params.mute = mute;
193	val = readl(host->io_base + SPDIF_OUT_CTRL);
194	val &= ~SPDIF_OPMODE_MASK;
195
196	if (mute)
197	val \|= SPDIF_OPMODE_MUTE_PCM;
198	else {
199	if (host->running)
200	val \|= SPDIF_OPMODE_AUD_DATA \| SPDIF_STATE_NORMAL;
201	else
202	val \|= SPDIF_OPMODE_OFF;
203	}
204
205	writel(val, host->io_base + SPDIF_OUT_CTRL);
206	return 0;
207	}
208
209	static int spdif_mute_get(struct snd_kcontrol *kcontrol,
210	struct snd_ctl_elem_value *ucontrol)
211	{
212	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
213	struct snd_soc_card *card = codec->card;
214	struct snd_soc_pcm_runtime *rtd = card->rtd;
215	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
216	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
217
218	ucontrol->value.integer.value[0] = host->saved_params.mute;
219	return 0;
220	}
221
222	static int spdif_mute_put(struct snd_kcontrol *kcontrol,
223	struct snd_ctl_elem_value *ucontrol)
224	{
225	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
226	struct snd_soc_card *card = codec->card;
227	struct snd_soc_pcm_runtime *rtd = card->rtd;
228	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
229	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
230
231	if (host->saved_params.mute == ucontrol->value.integer.value[0])
232	return 0;
233
234	spdif_digital_mute(cpu_dai, ucontrol->value.integer.value[0]);
235
236	return 1;
237	}
238	static const struct snd_kcontrol_new spdif_out_controls[] = {
239	SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
240	spdif_mute_get, spdif_mute_put),
241	};
242
19c7efcd	243	static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
e584f9b4	244	{
46fdd8b1 LPC	245	struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
	246
	247	dai->playback_dma_data = &host->dma_params;
	248
e584f9b4 VK	249	return snd_soc_add_dai_controls(dai, spdif_out_controls,
	250	ARRAY_SIZE(spdif_out_controls));
	251	}
	252
	253	static const struct snd_soc_dai_ops spdif_out_dai_ops = {
	254	.digital_mute = spdif_digital_mute,
	255	.startup = spdif_out_startup,
	256	.shutdown = spdif_out_shutdown,
	257	.trigger = spdif_out_trigger,
	258	.hw_params = spdif_out_hw_params,
	259	};
	260
	261	static struct snd_soc_dai_driver spdif_out_dai = {
	262	.playback = {
	263	.channels_min = 2,
	264	.channels_max = 2,
	265	.rates = (SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_44100 \| \
	266	SNDRV_PCM_RATE_48000 \| SNDRV_PCM_RATE_96000 \| \
	267	SNDRV_PCM_RATE_192000),
	268	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	269	},
	270	.probe = spdif_soc_dai_probe,
	271	.ops = &spdif_out_dai_ops,
	272	};
	273
a582d44b KM	274	static const struct snd_soc_component_driver spdif_out_component = {
	275	.name = "spdif-out",
	276	};
	277
e584f9b4 VK	278	static int spdif_out_probe(struct platform_device *pdev)
	279	{
	280	struct spdif_out_dev *host;
	281	struct spear_spdif_platform_data *pdata;
	282	struct resource *res;
e584f9b4	283
e584f9b4 VK	284	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
	285	if (!host) {
	286	dev_warn(&pdev->dev, "kzalloc fail\n");
	287	return -ENOMEM;
	288	}
	289
fc09cfbe TB	290	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	291	host->io_base = devm_ioremap_resource(&pdev->dev, res);
	292	if (IS_ERR(host->io_base))
	293	return PTR_ERR(host->io_base);
e584f9b4	294
bfcc74e6	295	host->clk = devm_clk_get(&pdev->dev, NULL);
e584f9b4 VK	296	if (IS_ERR(host->clk))
	297	return PTR_ERR(host->clk);
	298
	299	pdata = dev_get_platdata(&pdev->dev);
	300
	301	host->dma_params.data = pdata->dma_params;
	302	host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
	303	host->dma_params.max_burst = 16;
	304	host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
	305	host->dma_params.filter = pdata->filter;
	306
	307	dev_set_drvdata(&pdev->dev, host);
	308
25db0dc8 SK	309	return devm_snd_soc_register_component(&pdev->dev, &spdif_out_component,
25db0dc8 SK	310	&spdif_out_dai, 1);
e584f9b4 VK	311	}
e584f9b4 VK	312
e584f9b4 VK	313	#ifdef CONFIG_PM
	314	static int spdif_out_suspend(struct device *dev)
	315	{
	316	struct platform_device *pdev = to_platform_device(dev);
	317	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
	318
	319	if (host->running)
	320	clk_disable(host->clk);
	321
	322	return 0;
	323	}
	324
	325	static int spdif_out_resume(struct device *dev)
	326	{
	327	struct platform_device *pdev = to_platform_device(dev);
	328	struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
	329
	330	if (host->running) {
	331	clk_enable(host->clk);
	332	spdif_out_configure(host);
	333	spdif_out_clock(host, host->saved_params.core_freq,
	334	host->saved_params.rate);
	335	}
	336	return 0;
	337	}
	338
	339	static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
	340	spdif_out_resume);
	341
	342	#define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)
	343
	344	#else
	345	#define SPDIF_OUT_DEV_PM_OPS NULL
	346
	347	#endif
	348
	349	static struct platform_driver spdif_out_driver = {
	350	.probe = spdif_out_probe,
e584f9b4 VK	351	.driver = {
	352	.name = "spdif-out",
	353	.owner = THIS_MODULE,
	354	.pm = SPDIF_OUT_DEV_PM_OPS,
	355	},
	356	};
	357
	358	module_platform_driver(spdif_out_driver);
	359
	360	MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
	361	MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
	362	MODULE_LICENSE("GPL");
	363	MODULE_ALIAS("platform:spdif_out");