arndale.c

  1// SPDX-License-Identifier: GPL-2.0+
  2//
  3// Copyright (c) 2014, Insignal Co., Ltd.
  4//
  5//  Author: Claude <claude@insginal.co.kr>
  6
  7#include <linux/module.h>
  8#include <linux/of.h>
  9#include <linux/platform_device.h>
 10#include <linux/clk.h>
 11
 12#include <sound/soc.h>
 13#include <sound/soc-dapm.h>
 14#include <sound/pcm.h>
 15#include <sound/pcm_params.h>
 16
 17#include "../codecs/wm8994.h"
 18#include "i2s.h"
 19
 20static int arndale_rt5631_hw_params(struct snd_pcm_substream *substream,
 21				    struct snd_pcm_hw_params *params)
 22{
 23	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 24	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
 25	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 26	int rfs, ret;
 27	unsigned long rclk;
 28
 29	rfs = 256;
 30
 31	rclk = params_rate(params) * rfs;
 32
 33	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
 34					0, SND_SOC_CLOCK_OUT);
 35	if (ret < 0)
 36		return ret;
 37
 38	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
 39					0, SND_SOC_CLOCK_OUT);
 40
 41	if (ret < 0)
 42		return ret;
 43
 44	ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_OUT);
 45	if (ret < 0)
 46		return ret;
 47
 48	return 0;
 49}
 50
 51static const struct snd_soc_ops arndale_rt5631_ops = {
 52	.hw_params = arndale_rt5631_hw_params,
 53};
 54
 55static int arndale_wm1811_hw_params(struct snd_pcm_substream *substream,
 56				    struct snd_pcm_hw_params *params)
 57{
 58	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 59	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 60	unsigned int rfs, rclk;
 61
 62	/* Ensure AIF1CLK is >= 3 MHz for optimal performance */
 63	if (params_width(params) == 24)
 64		rfs = 384;
 65	else if (params_rate(params) == 8000 || params_rate(params) == 11025)
 66		rfs = 512;
 67	else
 68		rfs = 256;
 69
 70	rclk = params_rate(params) * rfs;
 71
 72	/*
 73	 * We add 1 to the frequency value to ensure proper EPLL setting
 74	 * for each audio sampling rate (see epll_24mhz_tbl in drivers/clk/
 75	 * samsung/clk-exynos5250.c for list of available EPLL rates).
 76	 * The CODEC uses clk API and the value will be rounded hence the MCLK1
 77	 * clock's frequency will still be exact multiple of the sample rate.
 78	 */
 79	return snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK1,
 80					rclk + 1, SND_SOC_CLOCK_IN);
 81}
 82
 83static const struct snd_soc_ops arndale_wm1811_ops = {
 84	.hw_params = arndale_wm1811_hw_params,
 85};
 86
 87SND_SOC_DAILINK_DEFS(rt5631_hifi,
 88	DAILINK_COMP_ARRAY(COMP_EMPTY()),
 89	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5631-aif1")),
 90	DAILINK_COMP_ARRAY(COMP_EMPTY()));
 91
 92static struct snd_soc_dai_link arndale_rt5631_dai[] = {
 93	{
 94		.name = "RT5631 HiFi",
 95		.stream_name = "Primary",
 96		.dai_fmt = SND_SOC_DAIFMT_I2S
 97			| SND_SOC_DAIFMT_NB_NF
 98			| SND_SOC_DAIFMT_CBC_CFC,
 99		.ops = &arndale_rt5631_ops,
100		SND_SOC_DAILINK_REG(rt5631_hifi),
101	},
102};
103
104SND_SOC_DAILINK_DEFS(wm1811_hifi,
105	DAILINK_COMP_ARRAY(COMP_EMPTY()),
106	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),
107	DAILINK_COMP_ARRAY(COMP_EMPTY()));
108
109static struct snd_soc_dai_link arndale_wm1811_dai[] = {
110	{
111		.name = "WM1811 HiFi",
112		.stream_name = "Primary",
113		.dai_fmt = SND_SOC_DAIFMT_I2S
114			| SND_SOC_DAIFMT_NB_NF
115			| SND_SOC_DAIFMT_CBP_CFP,
116		.ops = &arndale_wm1811_ops,
117		SND_SOC_DAILINK_REG(wm1811_hifi),
118	},
119};
120
121static struct snd_soc_card arndale_rt5631 = {
122	.name = "Arndale RT5631",
123	.owner = THIS_MODULE,
124	.dai_link = arndale_rt5631_dai,
125	.num_links = ARRAY_SIZE(arndale_rt5631_dai),
126};
127
128static struct snd_soc_card arndale_wm1811 = {
129	.name = "Arndale WM1811",
130	.owner = THIS_MODULE,
131	.dai_link = arndale_wm1811_dai,
132	.num_links = ARRAY_SIZE(arndale_wm1811_dai),
133};
134
135static void arndale_put_of_nodes(struct snd_soc_card *card)
136{
137	struct snd_soc_dai_link *dai_link;
138	int i;
139
140	for_each_card_prelinks(card, i, dai_link) {
141		of_node_put(dai_link->cpus->of_node);
142		of_node_put(dai_link->codecs->of_node);
143	}
144}
145
146static int arndale_audio_probe(struct platform_device *pdev)
147{
148	struct device_node *np = pdev->dev.of_node;
149	struct snd_soc_card *card;
150	struct snd_soc_dai_link *dai_link;
151	int ret;
152
153	card = (struct snd_soc_card *)of_device_get_match_data(&pdev->dev);
154	card->dev = &pdev->dev;
155	dai_link = card->dai_link;
156
157	dai_link->cpus->of_node = of_parse_phandle(np, "samsung,audio-cpu", 0);
158	if (!dai_link->cpus->of_node) {
159		dev_err(&pdev->dev,
160			"Property 'samsung,audio-cpu' missing or invalid\n");
161		return -EINVAL;
162	}
163
164	if (!dai_link->platforms->name)
165		dai_link->platforms->of_node = dai_link->cpus->of_node;
166
167	dai_link->codecs->of_node = of_parse_phandle(np, "samsung,audio-codec", 0);
168	if (!dai_link->codecs->of_node) {
169		dev_err(&pdev->dev,
170			"Property 'samsung,audio-codec' missing or invalid\n");
171		ret = -EINVAL;
172		goto err_put_of_nodes;
173	}
174
175	ret = devm_snd_soc_register_card(card->dev, card);
176	if (ret) {
177		dev_err_probe(&pdev->dev, ret,
178			      "snd_soc_register_card() failed\n");
179		goto err_put_of_nodes;
180	}
181	return 0;
182
183err_put_of_nodes:
184	arndale_put_of_nodes(card);
185	return ret;
186}
187
188static void arndale_audio_remove(struct platform_device *pdev)
189{
190	struct snd_soc_card *card = platform_get_drvdata(pdev);
191
192	arndale_put_of_nodes(card);
193}
194
195static const struct of_device_id arndale_audio_of_match[] = {
196	{ .compatible = "samsung,arndale-rt5631",  .data = &arndale_rt5631 },
197	{ .compatible = "samsung,arndale-alc5631", .data = &arndale_rt5631 },
198	{ .compatible = "samsung,arndale-wm1811",  .data = &arndale_wm1811 },
199	{},
200};
201MODULE_DEVICE_TABLE(of, arndale_audio_of_match);
202
203static struct platform_driver arndale_audio_driver = {
204	.driver = {
205		.name = "arndale-audio",
206		.pm = &snd_soc_pm_ops,
207		.of_match_table = arndale_audio_of_match,
208	},
209	.probe = arndale_audio_probe,
210	.remove = arndale_audio_remove,
211};
212
213module_platform_driver(arndale_audio_driver);
214
215MODULE_AUTHOR("Claude <claude@insignal.co.kr>");
216MODULE_DESCRIPTION("ALSA SoC Driver for Arndale Board");
217MODULE_LICENSE("GPL");