aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/s3c24xx/s3c64xx-i2s-v4.c
blob: 46b65d7cb630fa90843432eab4641d8afb8e56f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
/* sound/soc/s3c24xx/s3c64xx-i2s-v4.c
 *
 * ALSA SoC Audio Layer - S3C64XX I2Sv4 driver
 * Copyright (c) 2010 Samsung Electronics Co. Ltd
 * 	Author: Jaswinder Singh <jassi.brar@samsung.com>
 *
 * 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/clk.h>
#include <linux/gpio.h>
#include <linux/io.h>

#include <sound/soc.h>
#include <sound/pcm_params.h>

#include <plat/audio.h>

#include <mach/map.h>
#include <mach/dma.h>

#include "dma.h"
#include "regs-i2s-v2.h"
#include "s3c64xx-i2s.h"

static struct s3c2410_dma_client s3c64xx_dma_client_out = {
	.name		= "I2Sv4 PCM Stereo out"
};

static struct s3c2410_dma_client s3c64xx_dma_client_in = {
	.name		= "I2Sv4 PCM Stereo in"
};

static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out;
static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in;
static struct s3c_i2sv2_info s3c64xx_i2sv4;

static int s3c64xx_i2sv4_probe(struct snd_soc_dai *dai)
{
	struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
	int ret = 0;

	snd_soc_dai_set_drvdata(dai, i2s);

	ret = s3c_i2sv2_probe(dai, i2s, i2s->base);

	return ret;
}

static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream,
				 struct snd_pcm_hw_params *params,
				 struct snd_soc_dai *cpu_dai)
{
	struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
	struct s3c_dma_params *dma_data;
	u32 iismod;

	dev_dbg(cpu_dai->dev, "Entered %s\n", __func__);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		dma_data = i2s->dma_playback;
	else
		dma_data = i2s->dma_capture;

	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);

	iismod = readl(i2s->regs + S3C2412_IISMOD);
	dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod);

	iismod &= ~S3C64XX_IISMOD_BLC_MASK;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S8:
		iismod |= S3C64XX_IISMOD_BLC_8BIT;
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iismod |= S3C64XX_IISMOD_BLC_24BIT;
		break;
	}

	writel(iismod, i2s->regs + S3C2412_IISMOD);
	dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod);

	return 0;
}

static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = {
	.hw_params	= s3c_i2sv4_hw_params,
};

static struct snd_soc_dai_driver s3c64xx_i2s_v4_dai = {
	.symmetric_rates = 1,
	.playback = {
		.channels_min = 2,
		.channels_max = 2,
		.rates = S3C64XX_I2S_RATES,
		.formats = S3C64XX_I2S_FMTS,
	},
	.capture = {
		.channels_min = 2,
		.channels_max = 2,
		.rates = S3C64XX_I2S_RATES,
		.formats = S3C64XX_I2S_FMTS,
	},
	.probe = s3c64xx_i2sv4_probe,
	.ops = &s3c64xx_i2sv4_dai_ops,
};

static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev)
{
	struct s3c_audio_pdata *i2s_pdata;
	struct s3c_i2sv2_info *i2s;
	struct resource *res;
	int ret;

	i2s = &s3c64xx_i2sv4;

	i2s->feature |= S3C_FEATURE_CDCLKCON;

	i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in;
	i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out;

	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
	if (!res) {
		dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
		return -ENXIO;
	}
	i2s->dma_playback->channel = res->start;

	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
	if (!res) {
		dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
		return -ENXIO;
	}
	i2s->dma_capture->channel = res->start;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
		return -ENXIO;
	}

	if (!request_mem_region(res->start, resource_size(res),
				"s3c64xx-i2s-v4")) {
		dev_err(&pdev->dev, "Unable to request SFR region\n");
		return -EBUSY;
	}
	i2s->dma_capture->dma_addr = res->start + S3C2412_IISRXD;
	i2s->dma_playback->dma_addr = res->start + S3C2412_IISTXD;

	i2s->dma_capture->client = &s3c64xx_dma_client_in;
	i2s->dma_capture->dma_size = 4;
	i2s->dma_playback->client = &s3c64xx_dma_client_out;
	i2s->dma_playback->dma_size = 4;

	i2s->base = res->start;

	i2s_pdata = pdev->dev.platform_data;
	if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
		dev_err(&pdev->dev, "Unable to configure gpio\n");
		return -EINVAL;
	}

	i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
	if (IS_ERR(i2s->iis_cclk)) {
		dev_err(&pdev->dev, "failed to get audio-bus\n");
		ret = PTR_ERR(i2s->iis_cclk);
		goto err;
	}

	clk_enable(i2s->iis_cclk);

	ret = s3c_i2sv2_register_dai(&pdev->dev, pdev->id, &s3c64xx_i2s_v4_dai);
	if (ret != 0)
		goto err_i2sv2;

	return 0;

err_i2sv2:
	clk_put(i2s->iis_cclk);
err:
	return ret;
}

static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev)
{
	struct s3c_i2sv2_info *i2s = &s3c64xx_i2sv4;
	struct resource *res;

	snd_soc_unregister_dai(&pdev->dev);
	clk_put(i2s->iis_cclk);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res)
		release_mem_region(res->start, resource_size(res));
	else
		dev_warn(&pdev->dev, "Unable to get I2S SFR address\n");
		
	return 0;
}

static struct platform_driver s3c64xx_i2sv4_driver = {
	.probe  = s3c64xx_i2sv4_dev_probe,
	.remove = s3c64xx_i2sv4_dev_remove,
	.driver = {
		.name = "s3c64xx-iis-v4",
		.owner = THIS_MODULE,
	},
};

static int __init s3c64xx_i2sv4_init(void)
{
	return platform_driver_register(&s3c64xx_i2sv4_driver);
}
module_init(s3c64xx_i2sv4_init);

static void __exit s3c64xx_i2sv4_exit(void)
{
	platform_driver_unregister(&s3c64xx_i2sv4_driver);
}
module_exit(s3c64xx_i2sv4_exit);

/* Module information */
MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:s3c64xx-iis-v4");