1/*
2 * Machine driver for EVAL-ADAU1x81 on Analog Devices bfin
3 * evaluation boards.
4 *
5 * Copyright 2011-2014 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
7 *
8 * Licensed under the GPL-2 or later.
9 */
10
11#include <linux/module.h>
12#include <linux/device.h>
13#include <linux/slab.h>
14#include <sound/core.h>
15#include <sound/pcm.h>
16#include <sound/soc.h>
17#include <sound/pcm_params.h>
18
19#include "../codecs/adau17x1.h"
20
21static const struct snd_soc_dapm_widget bfin_eval_adau1x81_dapm_widgets[] = {
22	SND_SOC_DAPM_LINE("Stereo In", NULL),
23	SND_SOC_DAPM_LINE("Beep", NULL),
24
25	SND_SOC_DAPM_SPK("Speaker", NULL),
26	SND_SOC_DAPM_HP("Headphone", NULL),
27};
28
29static const struct snd_soc_dapm_route bfin_eval_adau1x81_dapm_routes[] = {
30	{ "BEEP", NULL, "Beep" },
31	{ "LMIC", NULL, "Stereo In" },
32	{ "LMIC", NULL, "Stereo In" },
33
34	{ "Headphone", NULL, "AOUTL" },
35	{ "Headphone", NULL, "AOUTR" },
36	{ "Speaker", NULL, "SP" },
37};
38
39static int bfin_eval_adau1x81_hw_params(struct snd_pcm_substream *substream,
40	struct snd_pcm_hw_params *params)
41{
42	struct snd_soc_pcm_runtime *rtd = substream->private_data;
43	struct snd_soc_dai *codec_dai = rtd->codec_dai;
44	int pll_rate;
45	int ret;
46
47	switch (params_rate(params)) {
48	case 48000:
49	case 8000:
50	case 12000:
51	case 16000:
52	case 24000:
53	case 32000:
54	case 96000:
55		pll_rate = 48000 * 1024;
56		break;
57	case 44100:
58	case 7350:
59	case 11025:
60	case 14700:
61	case 22050:
62	case 29400:
63	case 88200:
64		pll_rate = 44100 * 1024;
65		break;
66	default:
67		return -EINVAL;
68	}
69
70	ret = snd_soc_dai_set_pll(codec_dai, ADAU17X1_PLL,
71			ADAU17X1_PLL_SRC_MCLK, 12288000, pll_rate);
72	if (ret)
73		return ret;
74
75	ret = snd_soc_dai_set_sysclk(codec_dai, ADAU17X1_CLK_SRC_PLL, pll_rate,
76			SND_SOC_CLOCK_IN);
77
78	return ret;
79}
80
81static const struct snd_soc_ops bfin_eval_adau1x81_ops = {
82	.hw_params = bfin_eval_adau1x81_hw_params,
83};
84
85static struct snd_soc_dai_link bfin_eval_adau1x81_dai = {
86	.name = "adau1x81",
87	.stream_name = "adau1x81",
88	.cpu_dai_name = "bfin-i2s.0",
89	.codec_dai_name = "adau-hifi",
90	.platform_name = "bfin-i2s-pcm-audio",
91	.codec_name = "adau1781.0-0038",
92	.ops = &bfin_eval_adau1x81_ops,
93	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
94		SND_SOC_DAIFMT_CBM_CFM,
95};
96
97static struct snd_soc_card bfin_eval_adau1x81 = {
98	.name = "bfin-eval-adau1x81",
99	.driver_name = "eval-adau1x81",
100	.dai_link = &bfin_eval_adau1x81_dai,
101	.num_links = 1,
102
103	.dapm_widgets = bfin_eval_adau1x81_dapm_widgets,
104	.num_dapm_widgets = ARRAY_SIZE(bfin_eval_adau1x81_dapm_widgets),
105	.dapm_routes = bfin_eval_adau1x81_dapm_routes,
106	.num_dapm_routes = ARRAY_SIZE(bfin_eval_adau1x81_dapm_routes),
107	.fully_routed = true,
108};
109
110static int bfin_eval_adau1x81_probe(struct platform_device *pdev)
111{
112	bfin_eval_adau1x81.dev = &pdev->dev;
113
114	return devm_snd_soc_register_card(&pdev->dev, &bfin_eval_adau1x81);
115}
116
117static struct platform_driver bfin_eval_adau1x81_driver = {
118	.driver = {
119		.name = "bfin-eval-adau1x81",
120		.pm = &snd_soc_pm_ops,
121	},
122	.probe = bfin_eval_adau1x81_probe,
123};
124module_platform_driver(bfin_eval_adau1x81_driver);
125
126MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
127MODULE_DESCRIPTION("ALSA SoC bfin adau1x81 driver");
128MODULE_LICENSE("GPL");
129MODULE_ALIAS("platform:bfin-eval-adau1x81");
130