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1// SPDX-License-Identifier: GPL-2.02//3// ALSA SoC driver for Migo-R4//5// Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>6 7#include <linux/clkdev.h>8#include <linux/device.h>9#include <linux/firmware.h>10#include <linux/module.h>11 12#include <asm/clock.h>13 14#include <cpu/sh7722.h>15 16#include <sound/core.h>17#include <sound/pcm.h>18#include <sound/soc.h>19 20#include "../codecs/wm8978.h"21#include "siu.h"22 23/* Default 8000Hz sampling frequency */24static unsigned long codec_freq = 8000 * 512;25 26static unsigned int use_count;27 28/* External clock, sourced from the codec at the SIUMCKB pin */29static unsigned long siumckb_recalc(struct clk *clk)30{31 return codec_freq;32}33 34static struct sh_clk_ops siumckb_clk_ops = {35 .recalc = siumckb_recalc,36};37 38static struct clk siumckb_clk = {39 .ops = &siumckb_clk_ops,40 .rate = 0, /* initialised at run-time */41};42 43static struct clk_lookup *siumckb_lookup;44 45static int migor_hw_params(struct snd_pcm_substream *substream,46 struct snd_pcm_hw_params *params)47{48 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);49 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);50 int ret;51 unsigned int rate = params_rate(params);52 53 ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000,54 SND_SOC_CLOCK_IN);55 if (ret < 0)56 return ret;57 58 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512);59 if (ret < 0)60 return ret;61 62 codec_freq = rate * 512;63 /*64 * This propagates the parent frequency change to children and65 * recalculates the frequency table66 */67 clk_set_rate(&siumckb_clk, codec_freq);68 dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq);69 70 ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_cpu(rtd, 0), SIU_CLKB_EXT,71 codec_freq / 2, SND_SOC_CLOCK_IN);72 73 if (!ret)74 use_count++;75 76 return ret;77}78 79static int migor_hw_free(struct snd_pcm_substream *substream)80{81 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);82 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);83 84 if (use_count) {85 use_count--;86 87 if (!use_count)88 snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0,89 SND_SOC_CLOCK_IN);90 } else {91 dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n");92 }93 94 return 0;95}96 97static const struct snd_soc_ops migor_dai_ops = {98 .hw_params = migor_hw_params,99 .hw_free = migor_hw_free,100};101 102static const struct snd_soc_dapm_widget migor_dapm_widgets[] = {103 SND_SOC_DAPM_HP("Headphone", NULL),104 SND_SOC_DAPM_MIC("Onboard Microphone", NULL),105 SND_SOC_DAPM_MIC("External Microphone", NULL),106};107 108static const struct snd_soc_dapm_route audio_map[] = {109 /* Headphone output connected to LHP/RHP, enable OUT4 for VMID */110 { "Headphone", NULL, "OUT4 VMID" },111 { "OUT4 VMID", NULL, "LHP" },112 { "OUT4 VMID", NULL, "RHP" },113 114 /* On-board microphone */115 { "RMICN", NULL, "Mic Bias" },116 { "RMICP", NULL, "Mic Bias" },117 { "Mic Bias", NULL, "Onboard Microphone" },118 119 /* External microphone */120 { "LMICN", NULL, "Mic Bias" },121 { "LMICP", NULL, "Mic Bias" },122 { "Mic Bias", NULL, "External Microphone" },123};124 125/* migor digital audio interface glue - connects codec <--> CPU */126SND_SOC_DAILINK_DEFS(wm8978,127 DAILINK_COMP_ARRAY(COMP_CPU("siu-pcm-audio")),128 DAILINK_COMP_ARRAY(COMP_CODEC("wm8978.0-001a", "wm8978-hifi")),129 DAILINK_COMP_ARRAY(COMP_PLATFORM("siu-pcm-audio")));130 131static struct snd_soc_dai_link migor_dai = {132 .name = "wm8978",133 .stream_name = "WM8978",134 .dai_fmt = SND_SOC_DAIFMT_NB_IF | SND_SOC_DAIFMT_I2S |135 SND_SOC_DAIFMT_CBS_CFS,136 .ops = &migor_dai_ops,137 SND_SOC_DAILINK_REG(wm8978),138};139 140/* migor audio machine driver */141static struct snd_soc_card snd_soc_migor = {142 .name = "Migo-R",143 .owner = THIS_MODULE,144 .dai_link = &migor_dai,145 .num_links = 1,146 147 .dapm_widgets = migor_dapm_widgets,148 .num_dapm_widgets = ARRAY_SIZE(migor_dapm_widgets),149 .dapm_routes = audio_map,150 .num_dapm_routes = ARRAY_SIZE(audio_map),151};152 153static struct platform_device *migor_snd_device;154 155static int __init migor_init(void)156{157 int ret;158 159 ret = clk_register(&siumckb_clk);160 if (ret < 0)161 return ret;162 163 siumckb_lookup = clkdev_create(&siumckb_clk, "siumckb_clk", NULL);164 if (!siumckb_lookup) {165 ret = -ENOMEM;166 goto eclkdevalloc;167 }168 169 /* Port number used on this machine: port B */170 migor_snd_device = platform_device_alloc("soc-audio", 1);171 if (!migor_snd_device) {172 ret = -ENOMEM;173 goto epdevalloc;174 }175 176 platform_set_drvdata(migor_snd_device, &snd_soc_migor);177 178 ret = platform_device_add(migor_snd_device);179 if (ret)180 goto epdevadd;181 182 return 0;183 184epdevadd:185 platform_device_put(migor_snd_device);186epdevalloc:187 clkdev_drop(siumckb_lookup);188eclkdevalloc:189 clk_unregister(&siumckb_clk);190 return ret;191}192 193static void __exit migor_exit(void)194{195 clkdev_drop(siumckb_lookup);196 clk_unregister(&siumckb_clk);197 platform_device_unregister(migor_snd_device);198}199 200module_init(migor_init);201module_exit(migor_exit);202 203MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");204MODULE_DESCRIPTION("ALSA SoC Migor");205MODULE_LICENSE("GPL v2");206