1/*
2 * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
3 *
4 * Copyright (C) 2010 Texas Instruments, Inc
5 *
6 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/init.h>
25#include <linux/io.h>
26#include <linux/delay.h>
27#include <linux/pm.h>
28#include <linux/platform_device.h>
29#include <linux/device.h>
30#include <linux/slab.h>
31#include <linux/clk.h>
32#include <linux/mfd/davinci_voicecodec.h>
33#include <linux/spi/spi.h>
34
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/soc.h>
39#include <sound/initval.h>
40
41static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
42	SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
43	SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
44};
45
46static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
47{
48	struct snd_soc_codec *codec = dai->codec;
49	u8 reg;
50
51	if (mute)
52		reg = DAVINCI_VC_REG09_MUTE;
53	else
54		reg = 0;
55
56	snd_soc_update_bits(codec, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
57			    reg);
58
59	return 0;
60}
61
62static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
63				 int clk_id, unsigned int freq, int dir)
64{
65	switch (freq) {
66	case 22579200:
67	case 27000000:
68	case 33868800:
69		return 0;
70	}
71
72	return -EINVAL;
73}
74
75static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
76				enum snd_soc_bias_level level)
77{
78	switch (level) {
79	case SND_SOC_BIAS_ON:
80		snd_soc_write(codec, DAVINCI_VC_REG12,
81			     DAVINCI_VC_REG12_POWER_ALL_ON);
82		break;
83	case SND_SOC_BIAS_PREPARE:
84		break;
85	case SND_SOC_BIAS_STANDBY:
86		snd_soc_write(codec, DAVINCI_VC_REG12,
87			     DAVINCI_VC_REG12_POWER_ALL_OFF);
88		break;
89	case SND_SOC_BIAS_OFF:
90		/* force all power off */
91		snd_soc_write(codec, DAVINCI_VC_REG12,
92			     DAVINCI_VC_REG12_POWER_ALL_OFF);
93		break;
94	}
95
96	return 0;
97}
98
99#define CQ93VC_RATES	(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
100#define CQ93VC_FORMATS	(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
101
102static const struct snd_soc_dai_ops cq93vc_dai_ops = {
103	.digital_mute	= cq93vc_mute,
104	.set_sysclk	= cq93vc_set_dai_sysclk,
105};
106
107static struct snd_soc_dai_driver cq93vc_dai = {
108	.name = "cq93vc-hifi",
109	.playback = {
110		.stream_name = "Playback",
111		.channels_min = 1,
112		.channels_max = 2,
113		.rates = CQ93VC_RATES,
114		.formats = CQ93VC_FORMATS,},
115	.capture = {
116		.stream_name = "Capture",
117		.channels_min = 1,
118		.channels_max = 2,
119		.rates = CQ93VC_RATES,
120		.formats = CQ93VC_FORMATS,},
121	.ops = &cq93vc_dai_ops,
122};
123
124static struct regmap *cq93vc_get_regmap(struct device *dev)
125{
126	struct davinci_vc *davinci_vc = dev->platform_data;
127
128	return davinci_vc->regmap;
129}
130
131static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
132	.set_bias_level = cq93vc_set_bias_level,
133	.get_regmap = cq93vc_get_regmap,
134	.controls = cq93vc_snd_controls,
135	.num_controls = ARRAY_SIZE(cq93vc_snd_controls),
136};
137
138static int cq93vc_platform_probe(struct platform_device *pdev)
139{
140	return snd_soc_register_codec(&pdev->dev,
141			&soc_codec_dev_cq93vc, &cq93vc_dai, 1);
142}
143
144static int cq93vc_platform_remove(struct platform_device *pdev)
145{
146	snd_soc_unregister_codec(&pdev->dev);
147	return 0;
148}
149
150static struct platform_driver cq93vc_codec_driver = {
151	.driver = {
152			.name = "cq93vc-codec",
153	},
154
155	.probe = cq93vc_platform_probe,
156	.remove = cq93vc_platform_remove,
157};
158
159module_platform_driver(cq93vc_codec_driver);
160
161MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
162MODULE_AUTHOR("Miguel Aguilar");
163MODULE_LICENSE("GPL");
164