aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/pxa/raumfeld.c
blob: 2cda82bc5d2e4362e2a3941428ad1eaf9802934e (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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
/*
 * raumfeld_audio.c  --  SoC audio for Raumfeld audio devices
 *
 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 *
 * based on code from:
 *
 *    Wolfson Microelectronics PLC.
 *    Openedhand Ltd.
 *    Liam Girdwood <lrg@slimlogic.co.uk>
 *    Richard Purdie <richard@openedhand.com>
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include <asm/mach-types.h>

#include "pxa-ssp.h"

#define GPIO_SPDIF_RESET	(38)
#define GPIO_MCLK_RESET		(111)
#define GPIO_CODEC_RESET	(120)

static struct i2c_client *max9486_client;
static struct i2c_board_info max9486_hwmon_info = {
	I2C_BOARD_INFO("max9485", 0x63),
};

#define MAX9485_MCLK_FREQ_112896 0x22
#define MAX9485_MCLK_FREQ_122880 0x23
#define MAX9485_MCLK_FREQ_225792 0x32
#define MAX9485_MCLK_FREQ_245760 0x33

static void set_max9485_clk(char clk)
{
	i2c_master_send(max9486_client, &clk, 1);
}

static void raumfeld_enable_audio(bool en)
{
	if (en) {
		gpio_set_value(GPIO_MCLK_RESET, 1);

		/* wait some time to let the clocks become stable */
		msleep(100);

		gpio_set_value(GPIO_SPDIF_RESET, 1);
		gpio_set_value(GPIO_CODEC_RESET, 1);
	} else {
		gpio_set_value(GPIO_MCLK_RESET, 0);
		gpio_set_value(GPIO_SPDIF_RESET, 0);
		gpio_set_value(GPIO_CODEC_RESET, 0);
	}
}

/* CS4270 */
static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;

	/* set freq to 0 to enable all possible codec sample rates */
	return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
}

static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;

	/* set freq to 0 to enable all possible codec sample rates */
	snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
}

static int raumfeld_cs4270_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->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	unsigned int fmt, clk = 0;
	int ret = 0;

	switch (params_rate(params)) {
	case 44100:
		set_max9485_clk(MAX9485_MCLK_FREQ_112896);
		clk = 11289600;
		break;
	case 48000:
		set_max9485_clk(MAX9485_MCLK_FREQ_122880);
		clk = 12288000;
		break;
	case 88200:
		set_max9485_clk(MAX9485_MCLK_FREQ_225792);
		clk = 22579200;
		break;
	case 96000:
		set_max9485_clk(MAX9485_MCLK_FREQ_245760);
		clk = 24576000;
		break;
	default:
		return -EINVAL;
	}

	fmt = SND_SOC_DAIFMT_I2S |
	      SND_SOC_DAIFMT_NB_NF |
	      SND_SOC_DAIFMT_CBS_CFS;

	/* setup the CODEC DAI */
	ret = snd_soc_dai_set_fmt(codec_dai, fmt);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
	if (ret < 0)
		return ret;

	/* setup the CPU DAI */
	ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops raumfeld_cs4270_ops = {
	.startup = raumfeld_cs4270_startup,
	.shutdown = raumfeld_cs4270_shutdown,
	.hw_params = raumfeld_cs4270_hw_params,
};

static int raumfeld_line_suspend(struct platform_device *pdev, pm_message_t state)
{
	raumfeld_enable_audio(false);
	return 0;
}

static int raumfeld_line_resume(struct platform_device *pdev)
{
	raumfeld_enable_audio(true);
	return 0;
}

/* AK4104 */

static int raumfeld_ak4104_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->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int fmt, ret = 0, clk = 0;

	switch (params_rate(params)) {
	case 44100:
		set_max9485_clk(MAX9485_MCLK_FREQ_112896);
		clk = 11289600;
		break;
	case 48000:
		set_max9485_clk(MAX9485_MCLK_FREQ_122880);
		clk = 12288000;
		break;
	case 88200:
		set_max9485_clk(MAX9485_MCLK_FREQ_225792);
		clk = 22579200;
		break;
	case 96000:
		set_max9485_clk(MAX9485_MCLK_FREQ_245760);
		clk = 24576000;
		break;
	default:
		return -EINVAL;
	}

	fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;

	/* setup the CODEC DAI */
	ret = snd_soc_dai_set_fmt(codec_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	/* setup the CPU DAI */
	ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_fmt(cpu_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
	if (ret < 0)
		return ret;

	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
	if (ret < 0)
		return ret;

	return 0;
}

static struct snd_soc_ops raumfeld_ak4104_ops = {
	.hw_params = raumfeld_ak4104_hw_params,
};

static struct snd_soc_dai_link raumfeld_dai[] = {
{
	.name		= "ak4104",
	.stream_name	= "Playback",
	.cpu_dai_name = "pxa-ssp-dai.1",
	.codec_dai_name = "ak4104-hifi",
	.platform_name = "pxa-pcm-audio",
	.ops		= &raumfeld_ak4104_ops,
	.codec_name = "ak4104-codec.0",
},
{
	.name		= "CS4270",
	.stream_name	= "CS4270",
	.cpu_dai_name = "pxa-ssp-dai.0",
	.platform_name = "pxa-pcm-audio",
	.codec_dai_name = "cs4270-hifi",
	.codec_name = "cs4270-codec.0-0048",
	.ops		= &raumfeld_cs4270_ops,
},};

static struct snd_soc_card snd_soc_raumfeld = {
	.name		= "Raumfeld",
	.dai_link	= raumfeld_dai,
	.suspend_post	= raumfeld_line_suspend,
	.resume_pre	= raumfeld_line_resume,
	.num_links	= ARRAY_SIZE(raumfeld_dai),
};

static struct platform_device *raumfeld_audio_device;

static int __init raumfeld_audio_init(void)
{
	int ret;

	if (!machine_is_raumfeld_speaker() &&
	    !machine_is_raumfeld_connector())
		return 0;

	max9486_client = i2c_new_device(i2c_get_adapter(0),
					&max9486_hwmon_info);

	if (!max9486_client)
		return -ENOMEM;

	set_max9485_clk(MAX9485_MCLK_FREQ_122880);

	/* Register LINE and SPDIF */
	raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
	if (!raumfeld_audio_device)
		return -ENOMEM;

	platform_set_drvdata(raumfeld_audio_device,
			     &snd_soc_raumfeld);
	ret = platform_device_add(raumfeld_audio_device);

	/* no S/PDIF on Speakers */
	if (machine_is_raumfeld_speaker())
		return ret;

	raumfeld_enable_audio(true);

	return ret;
}

static void __exit raumfeld_audio_exit(void)
{
	raumfeld_enable_audio(false);

	platform_device_unregister(raumfeld_audio_device);

	i2c_unregister_device(max9486_client);

	gpio_free(GPIO_MCLK_RESET);
	gpio_free(GPIO_CODEC_RESET);
	gpio_free(GPIO_SPDIF_RESET);
}

module_init(raumfeld_audio_init);
module_exit(raumfeld_audio_exit);

/* Module information */
MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
MODULE_DESCRIPTION("Raumfeld audio SoC");
MODULE_LICENSE("GPL");