summaryrefslogtreecommitdiffstats
path: root/sound/soc/s3c24xx/s3c64xx-i2s.c
blob: 65528943579b80750e8e93c132f4e4c26321b551 (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
231
232
233
234
235
236
237
238
239
/* sound/soc/s3c24xx/s3c64xx-i2s.c
 *
 * ALSA SoC Audio Layer - S3C64XX I2S driver
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2008 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 *      http://armlinux.simtec.co.uk/
 *
 * 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 <plat/regs-s3c2412-iis.h>
#include <plat/gpio-bank-d.h>
#include <plat/gpio-bank-e.h>
#include <plat/gpio-cfg.h>

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

#include "s3c-dma.h"
#include "s3c64xx-i2s.h"

/* The value should be set to maximum of the total number
 * of I2Sv3 controllers that any supported SoC has.
 */
#define MAX_I2SV3	2

static struct s3c2410_dma_client s3c64xx_dma_client_out = {
	.name		= "I2S PCM Stereo out"
};

static struct s3c2410_dma_client s3c64xx_dma_client_in = {
	.name		= "I2S PCM Stereo in"
};

static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_out[MAX_I2SV3];
static struct s3c_dma_params s3c64xx_i2s_pcm_stereo_in[MAX_I2SV3];
static struct s3c_i2sv2_info s3c64xx_i2s[MAX_I2SV3];

struct snd_soc_dai s3c64xx_i2s_dai[MAX_I2SV3];
EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);

static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
{
	return cpu_dai->private_data;
}

static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
				  int clk_id, unsigned int freq, int dir)
{
	struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);

	switch (clk_id) {
	case S3C64XX_CLKSRC_PCLK:
		iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
		break;

	case S3C64XX_CLKSRC_MUX:
		iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
		break;

	case S3C64XX_CLKSRC_CDCLK:
		switch (dir) {
		case SND_SOC_CLOCK_IN:
			iismod |= S3C64XX_IISMOD_CDCLKCON;
			break;
		case SND_SOC_CLOCK_OUT:
			iismod &= ~S3C64XX_IISMOD_CDCLKCON;
			break;
		default:
			return -EINVAL;
		}
		break;

	default:
		return -EINVAL;
	}

	writel(iismod, i2s->regs + S3C2412_IISMOD);

	return 0;
}

struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai)
{
	struct s3c_i2sv2_info *i2s = to_info(dai);
	u32 iismod = readl(i2s->regs + S3C2412_IISMOD);

	if (iismod & S3C64XX_IISMOD_IMS_SYSMUX)
		return i2s->iis_cclk;
	else
		return i2s->iis_pclk;
}
EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock);

static int s3c64xx_i2s_probe(struct platform_device *pdev,
			     struct snd_soc_dai *dai)
{
	/* configure GPIO for i2s port */
	switch (dai->id) {
	case 0:
		s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
		s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
		s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
		s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
		s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
		break;
	case 1:
		s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
		s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
		s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
		s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
		s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
	}

	return 0;
}


static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
	.set_sysclk	= s3c64xx_i2s_set_sysclk,	
};

static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
{
	struct s3c_i2sv2_info *i2s;
	struct snd_soc_dai *dai;
	int ret;

	if (pdev->id >= MAX_I2SV3) {
		dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
		return -EINVAL;
	}

	i2s = &s3c64xx_i2s[pdev->id];
	dai = &s3c64xx_i2s_dai[pdev->id];
	dai->dev = &pdev->dev;
	dai->name = "s3c64xx-i2s";
	dai->id = pdev->id;
	dai->symmetric_rates = 1;
	dai->playback.channels_min = 2;
	dai->playback.channels_max = 2;
	dai->playback.rates = S3C64XX_I2S_RATES;
	dai->playback.formats = S3C64XX_I2S_FMTS;
	dai->capture.channels_min = 2;
	dai->capture.channels_max = 2;
	dai->capture.rates = S3C64XX_I2S_RATES;
	dai->capture.formats = S3C64XX_I2S_FMTS;
	dai->probe = s3c64xx_i2s_probe;
	dai->ops = &s3c64xx_i2s_dai_ops;

	i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
	i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];

	if (pdev->id == 0) {
		i2s->dma_capture->channel = DMACH_I2S0_IN;
		i2s->dma_capture->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISRXD;
		i2s->dma_playback->channel = DMACH_I2S0_OUT;
		i2s->dma_playback->dma_addr = S3C64XX_PA_IIS0 + S3C2412_IISTXD;
	} else {
		i2s->dma_capture->channel = DMACH_I2S1_IN;
		i2s->dma_capture->dma_addr = S3C64XX_PA_IIS1 + S3C2412_IISRXD;
		i2s->dma_playback->channel = DMACH_I2S1_OUT;
		i2s->dma_playback->dma_addr = S3C64XX_PA_IIS1 + 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->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_probe(pdev, dai, i2s, 0);
	if (ret)
		goto err_clk;

	ret = s3c_i2sv2_register_dai(dai);
	if (ret != 0)
		goto err_i2sv2;

	return 0;

err_i2sv2:
	/* Not implemented for I2Sv2 core yet */
err_clk:
	clk_put(i2s->iis_cclk);
err:
	return ret;
}

static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
{
	dev_err(&pdev->dev, "Device removal not yet supported\n");
	return 0;
}

static struct platform_driver s3c64xx_iis_driver = {
	.probe  = s3c64xx_iis_dev_probe,
	.remove = s3c64xx_iis_dev_remove,
	.driver = {
		.name = "s3c64xx-iis",
		.owner = THIS_MODULE,
	},
};

static int __init s3c64xx_i2s_init(void)
{
	return platform_driver_register(&s3c64xx_iis_driver);
}
module_init(s3c64xx_i2s_init);

static void __exit s3c64xx_i2s_exit(void)
{
	platform_driver_unregister(&s3c64xx_iis_driver);
}
module_exit(s3c64xx_i2s_exit);

/* Module information */
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
MODULE_LICENSE("GPL");