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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | // SPDX-License-Identifier: GPL-2.0-or-later /* * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based * ATMEL AT91SAM9G20ek board. * * Copyright (C) 2005 SAN People * Copyright (C) 2008 Atmel * * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> * * Based on ati_b1_wm8731.c by: * Frank Mandarino <fmandarino@endrelia.com> * Copyright 2006 Endrelia Technologies Inc. * Based on corgi.c by: * Copyright 2005 Wolfson Microelectronics PLC. * Copyright 2005 Openedhand Ltd. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/clk.h> #include <linux/timer.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/i2c.h> #include <linux/of.h> #include <linux/atmel-ssc.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> #include "../codecs/wm8731.h" #include "atmel-pcm.h" #include "atmel_ssc_dai.h" #define MCLK_RATE 12000000 /* * As shipped the board does not have inputs. However, it is relatively * straightforward to modify the board to hook them up so support is left * in the driver. */ #undef ENABLE_MIC_INPUT static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { SND_SOC_DAPM_MIC("Int Mic", NULL), SND_SOC_DAPM_SPK("Ext Spk", NULL), }; static const struct snd_soc_dapm_route intercon[] = { /* speaker connected to LHPOUT/RHPOUT */ {"Ext Spk", NULL, "LHPOUT"}, {"Ext Spk", NULL, "RHPOUT"}, /* mic is connected to Mic Jack, with WM8731 Mic Bias */ {"MICIN", NULL, "Mic Bias"}, {"Mic Bias", NULL, "Int Mic"}, }; /* * Logic for a wm8731 as connected on a at91sam9g20ek board. */ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); struct device *dev = rtd->dev; int ret; dev_dbg(dev, "%s called\n", __func__); ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, MCLK_RATE, SND_SOC_CLOCK_IN); if (ret < 0) { dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); return ret; } #ifndef ENABLE_MIC_INPUT snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); #endif return 0; } SND_SOC_DAILINK_DEFS(pcm, DAILINK_COMP_ARRAY(COMP_CPU("at91rm9200_ssc.0")), DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")), DAILINK_COMP_ARRAY(COMP_PLATFORM("at91rm9200_ssc.0"))); static struct snd_soc_dai_link at91sam9g20ek_dai = { .name = "WM8731", .stream_name = "WM8731 PCM", .init = at91sam9g20ek_wm8731_init, .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBP_CFP, #ifndef ENABLE_MIC_INPUT .playback_only = true, #endif SND_SOC_DAILINK_REG(pcm), }; static struct snd_soc_card snd_soc_at91sam9g20ek = { .name = "AT91SAMG20-EK", .owner = THIS_MODULE, .dai_link = &at91sam9g20ek_dai, .num_links = 1, .dapm_widgets = at91sam9g20ek_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), .dapm_routes = intercon, .num_dapm_routes = ARRAY_SIZE(intercon), .fully_routed = true, }; static int at91sam9g20ek_audio_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *codec_np, *cpu_np; struct snd_soc_card *card = &snd_soc_at91sam9g20ek; int ret; if (!np) { return -ENODEV; } ret = atmel_ssc_set_audio(0); if (ret) { dev_err(&pdev->dev, "ssc channel is not valid: %d\n", ret); return ret; } card->dev = &pdev->dev; /* Parse device node info */ ret = snd_soc_of_parse_card_name(card, "atmel,model"); if (ret) goto err; ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); if (ret) goto err; /* Parse codec info */ at91sam9g20ek_dai.codecs->name = NULL; codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); if (!codec_np) { dev_err(&pdev->dev, "codec info missing\n"); ret = -EINVAL; goto err; } at91sam9g20ek_dai.codecs->of_node = codec_np; /* Parse dai and platform info */ at91sam9g20ek_dai.cpus->dai_name = NULL; at91sam9g20ek_dai.platforms->name = NULL; cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "dai and pcm info missing\n"); of_node_put(codec_np); ret = -EINVAL; goto err; } at91sam9g20ek_dai.cpus->of_node = cpu_np; at91sam9g20ek_dai.platforms->of_node = cpu_np; of_node_put(codec_np); of_node_put(cpu_np); ret = snd_soc_register_card(card); if (ret) { dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); goto err; } return 0; err: atmel_ssc_put_audio(0); return ret; } static void at91sam9g20ek_audio_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); snd_soc_unregister_card(card); atmel_ssc_put_audio(0); } #ifdef CONFIG_OF static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, { } }; MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); #endif static struct platform_driver at91sam9g20ek_audio_driver = { .driver = { .name = "at91sam9g20ek-audio", .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), }, .probe = at91sam9g20ek_audio_probe, .remove_new = at91sam9g20ek_audio_remove, }; module_platform_driver(at91sam9g20ek_audio_driver); /* Module information */ MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); MODULE_ALIAS("platform:at91sam9g20ek-audio"); MODULE_LICENSE("GPL"); |