[mirror_ubuntu-bionic-kernel.git] / sound / soc / s3c24xx / s3c24xx_uda134x.c

/*
 * Modifications by Christian Pellegrin <chripell@evolware.org>
 *
 * s3c24xx_uda134x.c  --  S3C24XX_UDA134X ALSA SoC Audio board driver
 *
 * Copyright 2007 Dension Audio Systems Ltd.
 * Author: Zoltan Devai
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/s3c24xx_uda134x.h>
#include <sound/uda134x.h>

#include <asm/plat-s3c24xx/regs-iis.h>

#include "s3c24xx-pcm.h"
#include "s3c24xx-i2s.h"
#include "../codecs/uda134x_codec.h"


/* #define ENFORCE_RATES 1 */
/*
  Unfortunately the S3C24XX in master mode has a limited capacity of
  generating the clock for the codec. If you define this only rates
  that are really available will be enforced. But be careful, most
  user level application just want the usual sampling frequencies (8,
  11.025, 22.050, 44.1 kHz) and anyway resampling is a costly
  operation for embedded systems. So if you aren't very lucky or your
  hardware engineer wasn't very forward-looking it's better to leave
  this undefined. If you do so an approximate value for the requested
  sampling rate in the range -/+ 5% will be chosen. If this in not
  possible an error will be returned.
*/

static struct clk *xtal;
static struct clk *pclk;
/* this is need because we don't have a place where to keep the
 * pointers to the clocks in each substream. We get the clocks only
 * when we are actually using them so we don't block stuff like
 * frequency change or oscillator power-off */
static int clk_users;
static DEFINE_MUTEX(clk_lock);

static unsigned int rates[33 * 2];
#ifdef ENFORCE_RATES
static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
	.count	= ARRAY_SIZE(rates),
	.list	= rates,
	.mask	= 0,
};
#endif

static struct platform_device *s3c24xx_uda134x_snd_device;

int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream)
{
	int ret = 0;
#ifdef ENFORCE_RATES
	struct snd_pcm_runtime *runtime = substream->runtime;;
#endif

	mutex_lock(&clk_lock);
	pr_debug("%s %d\n", __func__, clk_users);
	if (clk_users == 0) {
		xtal = clk_get(&s3c24xx_uda134x_snd_device->dev, "xtal");
		if (!xtal) {
			printk(KERN_ERR "%s cannot get xtal\n", __func__);
			ret = -EBUSY;
		} else {
			pclk = clk_get(&s3c24xx_uda134x_snd_device->dev,
				       "pclk");
			if (!pclk) {
				printk(KERN_ERR "%s cannot get pclk\n",
				       __func__);
				clk_put(xtal);
				ret = -EBUSY;
			}
		}
		if (!ret) {
			int i, j;

			for (i = 0; i < 2; i++) {
				int fs = i ? 256 : 384;

				rates[i*33] = clk_get_rate(xtal) / fs;
				for (j = 1; j < 33; j++)
					rates[i*33 + j] = clk_get_rate(pclk) /
						(j * fs);
			}
		}
	}
	clk_users += 1;
	mutex_unlock(&clk_lock);
	if (!ret) {
#ifdef ENFORCE_RATES
		ret = snd_pcm_hw_constraint_list(runtime, 0,
						 SNDRV_PCM_HW_PARAM_RATE,
						 &hw_constraints_rates);
		if (ret < 0)
			printk(KERN_ERR "%s cannot set constraints\n",
			       __func__);
#endif
	}
	return ret;
}

void s3c24xx_uda134x_shutdown(struct snd_pcm_substream *substream)
{
	mutex_lock(&clk_lock);
	pr_debug("%s %d\n", __func__, clk_users);
	clk_users -= 1;
	if (clk_users == 0) {
		clk_put(xtal);
		xtal = NULL;
		clk_put(pclk);
		pclk = NULL;
	}
	mutex_unlock(&clk_lock);
}

static int s3c24xx_uda134x_hw_params(struct snd_pcm_substream *substream,
					struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
	unsigned int clk = 0;
	int ret = 0;
	int clk_source, fs_mode;
	unsigned long rate = params_rate(params);
	long err, cerr;
	unsigned int div;
	int i, bi;

	err = 999999;
	bi = 0;
	for (i = 0; i < 2*33; i++) {
		cerr = rates[i] - rate;
		if (cerr < 0)
			cerr = -cerr;
		if (cerr < err) {
			err = cerr;
			bi = i;
		}
	}
	if (bi / 33 == 1)
		fs_mode = S3C2410_IISMOD_256FS;
	else
		fs_mode = S3C2410_IISMOD_384FS;
	if (bi % 33 == 0) {
		clk_source = S3C24XX_CLKSRC_MPLL;
		div = 1;
	} else {
		clk_source = S3C24XX_CLKSRC_PCLK;
		div = bi % 33;
	}
	pr_debug("%s desired rate %lu, %d\n", __func__, rate, bi);

	clk = (fs_mode == S3C2410_IISMOD_384FS ? 384 : 256) * rate;
	pr_debug("%s will use: %s %s %d sysclk %d err %ld\n", __func__,
		 fs_mode == S3C2410_IISMOD_384FS ? "384FS" : "256FS",
		 clk_source == S3C24XX_CLKSRC_MPLL ? "MPLLin" : "PCLK",
		 div, clk, err);

	if ((err * 100 / rate) > 5) {
		printk(KERN_ERR "S3C24XX_UDA134X: effective frequency "
		       "too different from desired (%ld%%)\n",
		       err * 100 / rate);
		return -EINVAL;
	}

	ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
			SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, clk_source , clk,
						SND_SOC_CLOCK_IN);
	if (ret < 0)
		return ret;

	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
						fs_mode);
	if (ret < 0)
		return ret;

	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
						S3C2410_IISMOD_32FS);
	if (ret < 0)
		return ret;

	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
					  S3C24XX_PRESCALE(div, div));
	if (ret < 0)
		return ret;

	/* set the codec system clock for DAC and ADC */
	ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, clk,
						SND_SOC_CLOCK_OUT);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops s3c24xx_uda134x_ops = {
	.startup = s3c24xx_uda134x_startup,
	.shutdown = s3c24xx_uda134x_shutdown,
	.hw_params = s3c24xx_uda134x_hw_params,
};

static struct snd_soc_dai_link s3c24xx_uda134x_dai_link = {
	.name = "UDA134X",
	.stream_name = "UDA134X",
	.codec_dai = &uda134x_dai,
	.cpu_dai = &s3c24xx_i2s_dai,
	.ops = &s3c24xx_uda134x_ops,
};

static struct snd_soc_machine snd_soc_machine_s3c24xx_uda134x = {
	.name = "S3C24XX_UDA134X",
	.dai_link = &s3c24xx_uda134x_dai_link,
	.num_links = 1,
};

static struct s3c24xx_uda134x_platform_data *s3c24xx_uda134x_l3_pins;

static void setdat(int v)
{
	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_data, v > 0);
}

static void setclk(int v)
{
	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_clk, v > 0);
}

static void setmode(int v)
{
	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_mode, v > 0);
}

static struct uda134x_platform_data s3c24xx_uda134x = {
	.l3 = {
		.setdat = setdat,
		.setclk = setclk,
		.setmode = setmode,
		.data_hold = 1,
		.data_setup = 1,
		.clock_high = 1,
		.mode_hold = 1,
		.mode = 1,
		.mode_setup = 1,
	},
};

static struct snd_soc_device s3c24xx_uda134x_snd_devdata = {
	.machine = &snd_soc_machine_s3c24xx_uda134x,
	.platform = &s3c24xx_soc_platform,
	.codec_dev = &soc_codec_dev_uda134x,
	.codec_data = &s3c24xx_uda134x,
};

static int s3c24xx_uda134x_setup_pin(int pin, char *fun)
{
	if (gpio_request(pin, "s3c24xx_uda134x") < 0) {
		printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
		       "l3 %s pin already in use", fun);
		return -EBUSY;
	}
	gpio_direction_output(pin, 0);
	return 0;
}

static int s3c24xx_uda134x_probe(struct platform_device *pdev)
{
	int ret;

	printk(KERN_INFO "S3C24XX_UDA134X SoC Audio driver\n");

	s3c24xx_uda134x_l3_pins = pdev->dev.platform_data;
	if (s3c24xx_uda134x_l3_pins == NULL) {
		printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
		       "unable to find platform data\n");
		return -ENODEV;
	}
	s3c24xx_uda134x.power = s3c24xx_uda134x_l3_pins->power;
	s3c24xx_uda134x.model = s3c24xx_uda134x_l3_pins->model;

	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_data,
				      "data") < 0)
		return -EBUSY;
	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_clk,
				      "clk") < 0) {
		gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
		return -EBUSY;
	}
	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_mode,
				      "mode") < 0) {
		gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
		gpio_free(s3c24xx_uda134x_l3_pins->l3_clk);
		return -EBUSY;
	}

	s3c24xx_uda134x_snd_device = platform_device_alloc("soc-audio", -1);
	if (!s3c24xx_uda134x_snd_device) {
		printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
		       "Unable to register\n");
		return -ENOMEM;
	}

	platform_set_drvdata(s3c24xx_uda134x_snd_device,
			     &s3c24xx_uda134x_snd_devdata);
	s3c24xx_uda134x_snd_devdata.dev = &s3c24xx_uda134x_snd_device->dev;
	ret = platform_device_add(s3c24xx_uda134x_snd_device);
	if (ret) {
		printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: Unable to add\n");
		platform_device_put(s3c24xx_uda134x_snd_device);
	}

	return ret;
}

static int s3c24xx_uda134x_remove(struct platform_device *pdev)
{
	platform_device_unregister(s3c24xx_uda134x_snd_device);
	gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
	gpio_free(s3c24xx_uda134x_l3_pins->l3_clk);
	gpio_free(s3c24xx_uda134x_l3_pins->l3_mode);
	return 0;
}

static struct platform_driver s3c24xx_uda134x_driver = {
	.probe  = s3c24xx_uda134x_probe,
	.remove = s3c24xx_uda134x_remove,
	.driver = {
		.name = "s3c24xx_uda134x",
		.owner = THIS_MODULE,
	},
};

static int __init s3c24xx_uda134x_init(void)
{
	return platform_driver_register(&s3c24xx_uda134x_driver);
}

static void __exit s3c24xx_uda134x_exit(void)
{
	platform_driver_unregister(&s3c24xx_uda134x_driver);
}


module_init(s3c24xx_uda134x_init);
module_exit(s3c24xx_uda134x_exit);

MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
MODULE_DESCRIPTION("S3C24XX_UDA134X ALSA SoC audio driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
7ad933d7 CP	1	/*
	2	* Modifications by Christian Pellegrin <chripell@evolware.org>
	3	*
	4	* s3c24xx_uda134x.c -- S3C24XX_UDA134X ALSA SoC Audio board driver
	5	*
	6	* Copyright 2007 Dension Audio Systems Ltd.
	7	* Author: Zoltan Devai
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/clk.h>
	16	#include <linux/mutex.h>
	17	#include <linux/gpio.h>
	18	#include <sound/pcm.h>
	19	#include <sound/pcm_params.h>
	20	#include <sound/soc.h>
	21	#include <sound/soc-dapm.h>
	22	#include <sound/s3c24xx_uda134x.h>
	23	#include <sound/uda134x.h>
	24
	25	#include <asm/plat-s3c24xx/regs-iis.h>
	26
	27	#include "s3c24xx-pcm.h"
	28	#include "s3c24xx-i2s.h"
	29	#include "../codecs/uda134x_codec.h"
	30
	31
	32	/* #define ENFORCE_RATES 1 */
	33	/*
	34	Unfortunately the S3C24XX in master mode has a limited capacity of
	35	generating the clock for the codec. If you define this only rates
	36	that are really available will be enforced. But be careful, most
	37	user level application just want the usual sampling frequencies (8,
	38	11.025, 22.050, 44.1 kHz) and anyway resampling is a costly
	39	operation for embedded systems. So if you aren't very lucky or your
	40	hardware engineer wasn't very forward-looking it's better to leave
	41	this undefined. If you do so an approximate value for the requested
	42	sampling rate in the range -/+ 5% will be chosen. If this in not
	43	possible an error will be returned.
	44	*/
	45
	46	static struct clk *xtal;
	47	static struct clk *pclk;
	48	/* this is need because we don't have a place where to keep the
	49	* pointers to the clocks in each substream. We get the clocks only
	50	* when we are actually using them so we don't block stuff like
	51	* frequency change or oscillator power-off */
	52	static int clk_users;
	53	static DEFINE_MUTEX(clk_lock);
	54
	55	static unsigned int rates[33 * 2];
	56	#ifdef ENFORCE_RATES
	57	static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
	58	.count = ARRAY_SIZE(rates),
	59	.list = rates,
	60	.mask = 0,
	61	};
	62	#endif
	63
	64	static struct platform_device *s3c24xx_uda134x_snd_device;
65
66	int s3c24xx_uda134x_startup(struct snd_pcm_substream *substream)
67	{
68	int ret = 0;
69	#ifdef ENFORCE_RATES
70	struct snd_pcm_runtime *runtime = substream->runtime;;
71	#endif
72
73	mutex_lock(&clk_lock);
74	pr_debug("%s %d\n", __func__, clk_users);
75	if (clk_users == 0) {
76	xtal = clk_get(&s3c24xx_uda134x_snd_device->dev, "xtal");
77	if (!xtal) {
78	printk(KERN_ERR "%s cannot get xtal\n", __func__);
79	ret = -EBUSY;
80	} else {
81	pclk = clk_get(&s3c24xx_uda134x_snd_device->dev,
82	"pclk");
83	if (!pclk) {
84	printk(KERN_ERR "%s cannot get pclk\n",
85	__func__);
86	clk_put(xtal);
87	ret = -EBUSY;
88	}
89	}
90	if (!ret) {
91	int i, j;
92
93	for (i = 0; i < 2; i++) {
94	int fs = i ? 256 : 384;
95
96	rates[i*33] = clk_get_rate(xtal) / fs;
97	for (j = 1; j < 33; j++)
98	rates[i*33 + j] = clk_get_rate(pclk) /
99	(j * fs);
100	}
101	}
102	}
103	clk_users += 1;
104	mutex_unlock(&clk_lock);
105	if (!ret) {
106	#ifdef ENFORCE_RATES
107	ret = snd_pcm_hw_constraint_list(runtime, 0,
108	SNDRV_PCM_HW_PARAM_RATE,
109	&hw_constraints_rates);
110	if (ret < 0)
111	printk(KERN_ERR "%s cannot set constraints\n",
112	__func__);
113	#endif
114	}
115	return ret;
116	}
117
118	void s3c24xx_uda134x_shutdown(struct snd_pcm_substream *substream)
119	{
120	mutex_lock(&clk_lock);
121	pr_debug("%s %d\n", __func__, clk_users);
122	clk_users -= 1;
123	if (clk_users == 0) {
124	clk_put(xtal);
125	xtal = NULL;
126	clk_put(pclk);
127	pclk = NULL;
128	}
129	mutex_unlock(&clk_lock);
130	}
131
132	static int s3c24xx_uda134x_hw_params(struct snd_pcm_substream *substream,
133	struct snd_pcm_hw_params *params)
134	{
135	struct snd_soc_pcm_runtime *rtd = substream->private_data;
136	struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
137	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
138	unsigned int clk = 0;
139	int ret = 0;
140	int clk_source, fs_mode;
141	unsigned long rate = params_rate(params);
142	long err, cerr;
143	unsigned int div;
144	int i, bi;
145
146	err = 999999;
147	bi = 0;
148	for (i = 0; i < 2*33; i++) {
149	cerr = rates[i] - rate;
150	if (cerr < 0)
151	cerr = -cerr;
152	if (cerr < err) {
153	err = cerr;
154	bi = i;
155	}
156	}
157	if (bi / 33 == 1)
158	fs_mode = S3C2410_IISMOD_256FS;
159	else
160	fs_mode = S3C2410_IISMOD_384FS;
161	if (bi % 33 == 0) {
162	clk_source = S3C24XX_CLKSRC_MPLL;
163	div = 1;
164	} else {
165	clk_source = S3C24XX_CLKSRC_PCLK;
166	div = bi % 33;
167	}
168	pr_debug("%s desired rate %lu, %d\n", __func__, rate, bi);
169
170	clk = (fs_mode == S3C2410_IISMOD_384FS ? 384 : 256) * rate;
171	pr_debug("%s will use: %s %s %d sysclk %d err %ld\n", __func__,
172	fs_mode == S3C2410_IISMOD_384FS ? "384FS" : "256FS",
173	clk_source == S3C24XX_CLKSRC_MPLL ? "MPLLin" : "PCLK",
174	div, clk, err);
175
176	if ((err * 100 / rate) > 5) {
177	printk(KERN_ERR "S3C24XX_UDA134X: effective frequency "
178	"too different from desired (%ld%%)\n",
179	err * 100 / rate);
180	return -EINVAL;
181	}
182
183	ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
184	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
185	if (ret < 0)
186	return ret;
187
188	ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
189	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
190	if (ret < 0)
191	return ret;
192
193	ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, clk_source , clk,
194	SND_SOC_CLOCK_IN);
195	if (ret < 0)
196	return ret;
197
198	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
199	fs_mode);
200	if (ret < 0)
201	return ret;
202
203	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_BCLK,
204	S3C2410_IISMOD_32FS);
205	if (ret < 0)
206	return ret;
207
208	ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
209	S3C24XX_PRESCALE(div, div));
210	if (ret < 0)
211	return ret;
212
213	/* set the codec system clock for DAC and ADC */
214	ret = codec_dai->dai_ops.set_sysclk(codec_dai, 0, clk,
215	SND_SOC_CLOCK_OUT);
216	if (ret < 0)
217	return ret;
218
219	return 0;
220	}
221
222	static struct snd_soc_ops s3c24xx_uda134x_ops = {
223	.startup = s3c24xx_uda134x_startup,
224	.shutdown = s3c24xx_uda134x_shutdown,
225	.hw_params = s3c24xx_uda134x_hw_params,
226	};
227
228	static struct snd_soc_dai_link s3c24xx_uda134x_dai_link = {
229	.name = "UDA134X",
230	.stream_name = "UDA134X",
231	.codec_dai = &uda134x_dai,
232	.cpu_dai = &s3c24xx_i2s_dai,
233	.ops = &s3c24xx_uda134x_ops,
234	};
235
236	static struct snd_soc_machine snd_soc_machine_s3c24xx_uda134x = {
237	.name = "S3C24XX_UDA134X",
238	.dai_link = &s3c24xx_uda134x_dai_link,
239	.num_links = 1,
240	};
241
242	static struct s3c24xx_uda134x_platform_data *s3c24xx_uda134x_l3_pins;
243
244	static void setdat(int v)
245	{
246	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_data, v > 0);
247	}
248
249	static void setclk(int v)
250	{
251	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_clk, v > 0);
252	}
253
254	static void setmode(int v)
255	{
256	gpio_set_value(s3c24xx_uda134x_l3_pins->l3_mode, v > 0);
257	}
258
259	static struct uda134x_platform_data s3c24xx_uda134x = {
260	.l3 = {
261	.setdat = setdat,
262	.setclk = setclk,
263	.setmode = setmode,
264	.data_hold = 1,
265	.data_setup = 1,
266	.clock_high = 1,
267	.mode_hold = 1,
268	.mode = 1,
269	.mode_setup = 1,
270	},
271	};
272
273	static struct snd_soc_device s3c24xx_uda134x_snd_devdata = {
274	.machine = &snd_soc_machine_s3c24xx_uda134x,
275	.platform = &s3c24xx_soc_platform,
276	.codec_dev = &soc_codec_dev_uda134x,
277	.codec_data = &s3c24xx_uda134x,
278	};
279
280	static int s3c24xx_uda134x_setup_pin(int pin, char *fun)
281	{
282	if (gpio_request(pin, "s3c24xx_uda134x") < 0) {
283	printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
284	"l3 %s pin already in use", fun);
285	return -EBUSY;
286	}
287	gpio_direction_output(pin, 0);
288	return 0;
289	}
290
291	static int s3c24xx_uda134x_probe(struct platform_device *pdev)
292	{
293	int ret;
294
295	printk(KERN_INFO "S3C24XX_UDA134X SoC Audio driver\n");
296
297	s3c24xx_uda134x_l3_pins = pdev->dev.platform_data;
298	if (s3c24xx_uda134x_l3_pins == NULL) {
299	printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
300	"unable to find platform data\n");
301	return -ENODEV;
302	}
303	s3c24xx_uda134x.power = s3c24xx_uda134x_l3_pins->power;
304	s3c24xx_uda134x.model = s3c24xx_uda134x_l3_pins->model;
305
306	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_data,
307	"data") < 0)
308	return -EBUSY;
309	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_clk,
310	"clk") < 0) {
311	gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
312	return -EBUSY;
313	}
314	if (s3c24xx_uda134x_setup_pin(s3c24xx_uda134x_l3_pins->l3_mode,
315	"mode") < 0) {
316	gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
317	gpio_free(s3c24xx_uda134x_l3_pins->l3_clk);
318	return -EBUSY;
319	}
320
321	s3c24xx_uda134x_snd_device = platform_device_alloc("soc-audio", -1);
322	if (!s3c24xx_uda134x_snd_device) {
323	printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: "
324	"Unable to register\n");
325	return -ENOMEM;
326	}
327
328	platform_set_drvdata(s3c24xx_uda134x_snd_device,
329	&s3c24xx_uda134x_snd_devdata);
330	s3c24xx_uda134x_snd_devdata.dev = &s3c24xx_uda134x_snd_device->dev;
331	ret = platform_device_add(s3c24xx_uda134x_snd_device);
332	if (ret) {
333	printk(KERN_ERR "S3C24XX_UDA134X SoC Audio: Unable to add\n");
334	platform_device_put(s3c24xx_uda134x_snd_device);
335	}
336
337	return ret;
338	}
339
340	static int s3c24xx_uda134x_remove(struct platform_device *pdev)
341	{
342	platform_device_unregister(s3c24xx_uda134x_snd_device);
343	gpio_free(s3c24xx_uda134x_l3_pins->l3_data);
344	gpio_free(s3c24xx_uda134x_l3_pins->l3_clk);
345	gpio_free(s3c24xx_uda134x_l3_pins->l3_mode);
346	return 0;
347	}
348
349	static struct platform_driver s3c24xx_uda134x_driver = {
350	.probe = s3c24xx_uda134x_probe,
351	.remove = s3c24xx_uda134x_remove,
352	.driver = {
353	.name = "s3c24xx_uda134x",
354	.owner = THIS_MODULE,
355	},
356	};
357
358	static int __init s3c24xx_uda134x_init(void)
359	{
360	return platform_driver_register(&s3c24xx_uda134x_driver);
361	}
362
363	static void __exit s3c24xx_uda134x_exit(void)
364	{
365	platform_driver_unregister(&s3c24xx_uda134x_driver);
366	}
367
368
369	module_init(s3c24xx_uda134x_init);
370	module_exit(s3c24xx_uda134x_exit);
371
372	MODULE_AUTHOR("Zoltan Devai, Christian Pellegrin <chripell@evolware.org>");
373	MODULE_DESCRIPTION("S3C24XX_UDA134X ALSA SoC audio driver");
374	MODULE_LICENSE("GPL");