Loading...
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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * atmel_wm8904 - Atmel ASoC driver for boards with WM8904 codec. * * Copyright (C) 2012 Atmel * * Author: Bo Shen <voice.shen@atmel.com> */ #include <linux/clk.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_device.h> #include <sound/soc.h> #include "../codecs/wm8904.h" #include "atmel_ssc_dai.h" static const struct snd_soc_dapm_widget atmel_asoc_wm8904_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_MIC("Mic", NULL), SND_SOC_DAPM_LINE("Line In Jack", NULL), }; static int atmel_asoc_wm8904_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); int ret; ret = snd_soc_dai_set_pll(codec_dai, WM8904_FLL_MCLK, WM8904_FLL_MCLK, 32768, params_rate(params) * 256); if (ret < 0) { pr_err("%s - failed to set wm8904 codec PLL.", __func__); return ret; } /* * As here wm8904 use FLL output as its system clock * so calling set_sysclk won't care freq parameter * then we pass 0 */ ret = snd_soc_dai_set_sysclk(codec_dai, WM8904_CLK_FLL, 0, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("%s -failed to set wm8904 SYSCLK\n", __func__); return ret; } return 0; } static const struct snd_soc_ops atmel_asoc_wm8904_ops = { .hw_params = atmel_asoc_wm8904_hw_params, }; SND_SOC_DAILINK_DEFS(pcm, DAILINK_COMP_ARRAY(COMP_EMPTY()), DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8904-hifi")), DAILINK_COMP_ARRAY(COMP_EMPTY())); static struct snd_soc_dai_link atmel_asoc_wm8904_dailink = { .name = "WM8904", .stream_name = "WM8904 PCM", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBP_CFP, .ops = &atmel_asoc_wm8904_ops, SND_SOC_DAILINK_REG(pcm), }; static struct snd_soc_card atmel_asoc_wm8904_card = { .name = "atmel_asoc_wm8904", .owner = THIS_MODULE, .dai_link = &atmel_asoc_wm8904_dailink, .num_links = 1, .dapm_widgets = atmel_asoc_wm8904_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(atmel_asoc_wm8904_dapm_widgets), .fully_routed = true, }; static int atmel_asoc_wm8904_dt_init(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *codec_np, *cpu_np; struct snd_soc_card *card = &atmel_asoc_wm8904_card; struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; int ret; if (!np) { dev_err(&pdev->dev, "only device tree supported\n"); return -EINVAL; } ret = snd_soc_of_parse_card_name(card, "atmel,model"); if (ret) { dev_err(&pdev->dev, "failed to parse card name\n"); return ret; } ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); if (ret) { dev_err(&pdev->dev, "failed to parse audio routing\n"); return ret; } cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "failed to get dai and pcm info\n"); ret = -EINVAL; return ret; } dailink->cpus->of_node = cpu_np; dailink->platforms->of_node = cpu_np; of_node_put(cpu_np); codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); if (!codec_np) { dev_err(&pdev->dev, "failed to get codec info\n"); ret = -EINVAL; return ret; } dailink->codecs->of_node = codec_np; of_node_put(codec_np); return 0; } static int atmel_asoc_wm8904_probe(struct platform_device *pdev) { struct snd_soc_card *card = &atmel_asoc_wm8904_card; struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; int id, ret; card->dev = &pdev->dev; ret = atmel_asoc_wm8904_dt_init(pdev); if (ret) { dev_err(&pdev->dev, "failed to init dt info\n"); return ret; } id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc"); ret = atmel_ssc_set_audio(id); if (ret != 0) { dev_err(&pdev->dev, "failed to set SSC %d for audio\n", id); return ret; } ret = snd_soc_register_card(card); if (ret) { dev_err(&pdev->dev, "snd_soc_register_card failed\n"); goto err_set_audio; } return 0; err_set_audio: atmel_ssc_put_audio(id); return ret; } static int atmel_asoc_wm8904_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); struct snd_soc_dai_link *dailink = &atmel_asoc_wm8904_dailink; int id; id = of_alias_get_id((struct device_node *)dailink->cpus->of_node, "ssc"); snd_soc_unregister_card(card); atmel_ssc_put_audio(id); return 0; } #ifdef CONFIG_OF static const struct of_device_id atmel_asoc_wm8904_dt_ids[] = { { .compatible = "atmel,asoc-wm8904", }, { } }; MODULE_DEVICE_TABLE(of, atmel_asoc_wm8904_dt_ids); #endif static struct platform_driver atmel_asoc_wm8904_driver = { .driver = { .name = "atmel-wm8904-audio", .of_match_table = of_match_ptr(atmel_asoc_wm8904_dt_ids), .pm = &snd_soc_pm_ops, }, .probe = atmel_asoc_wm8904_probe, .remove = atmel_asoc_wm8904_remove, }; module_platform_driver(atmel_asoc_wm8904_driver); /* Module information */ MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>"); MODULE_DESCRIPTION("ALSA SoC machine driver for Atmel EK with WM8904 codec"); MODULE_LICENSE("GPL"); |