// SPDX-License-Identifier: GPL-2.0+ // // Littlemill audio support // // Copyright 2011 Wolfson Microelectronics #include #include #include #include #include #include "../codecs/wm8994.h" static int sample_rate = 44100; static int littlemill_set_bias_level(struct snd_soc_card *card, struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) { struct snd_soc_pcm_runtime *rtd; struct snd_soc_dai *aif1_dai; int ret; rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); aif1_dai = asoc_rtd_to_codec(rtd, 0); if (dapm->dev != aif1_dai->dev) return 0; switch (level) { case SND_SOC_BIAS_PREPARE: /* * If we've not already clocked things via hw_params() * then do so now, otherwise these are noops. */ if (dapm->bias_level == SND_SOC_BIAS_STANDBY) { ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK2, 32768, sample_rate * 512); if (ret < 0) { pr_err("Failed to start FLL: %d\n", ret); return ret; } ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1, sample_rate * 512, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("Failed to set SYSCLK: %d\n", ret); return ret; } } break; default: break; } return 0; } static int littlemill_set_bias_level_post(struct snd_soc_card *card, struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) { struct snd_soc_pcm_runtime *rtd; struct snd_soc_dai *aif1_dai; int ret; rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); aif1_dai = asoc_rtd_to_codec(rtd, 0); if (dapm->dev != aif1_dai->dev) return 0; switch (level) { case SND_SOC_BIAS_STANDBY: ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, 32768, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("Failed to switch away from FLL1: %d\n", ret); return ret; } ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0); if (ret < 0) { pr_err("Failed to stop FLL1: %d\n", ret); return ret; } break; default: break; } dapm->bias_level = level; return 0; } static int littlemill_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; sample_rate = params_rate(params); ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK2, 32768, sample_rate * 512); if (ret < 0) { pr_err("Failed to start FLL: %d\n", ret); return ret; } ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1, sample_rate * 512, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("Failed to set SYSCLK: %d\n", ret); return ret; } return 0; } static struct snd_soc_ops littlemill_ops = { .hw_params = littlemill_hw_params, }; static const struct snd_soc_pcm_stream baseband_params = { .formats = SNDRV_PCM_FMTBIT_S32_LE, .rate_min = 8000, .rate_max = 8000, .channels_min = 2, .channels_max = 2, }; SND_SOC_DAILINK_DEFS(cpu, DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")), DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")), DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0"))); SND_SOC_DAILINK_DEFS(baseband, DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")), DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027", "wm1250-ev1"))); static struct snd_soc_dai_link littlemill_dai[] = { { .name = "CPU", .stream_name = "CPU", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .ops = &littlemill_ops, SND_SOC_DAILINK_REG(cpu), }, { .name = "Baseband", .stream_name = "Baseband", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .ignore_suspend = 1, .params = &baseband_params, SND_SOC_DAILINK_REG(baseband), }, }; static int bbclk_ev(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { struct snd_soc_card *card = w->dapm->card; struct snd_soc_pcm_runtime *rtd; struct snd_soc_dai *aif2_dai; int ret; rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]); aif2_dai = asoc_rtd_to_cpu(rtd, 0); switch (event) { case SND_SOC_DAPM_PRE_PMU: ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2, WM8994_FLL_SRC_BCLK, 64 * 8000, 8000 * 256); if (ret < 0) { pr_err("Failed to start FLL: %d\n", ret); return ret; } ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2, 8000 * 256, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("Failed to set SYSCLK: %d\n", ret); return ret; } break; case SND_SOC_DAPM_POST_PMD: ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2, 32768, SND_SOC_CLOCK_IN); if (ret < 0) { pr_err("Failed to switch away from FLL2: %d\n", ret); return ret; } ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2, 0, 0, 0); if (ret < 0) { pr_err("Failed to stop FLL2: %d\n", ret); return ret; } break; default: return -EINVAL; } return 0; } static const struct snd_kcontrol_new controls[] = { SOC_DAPM_PIN_SWITCH("WM1250 Input"), SOC_DAPM_PIN_SWITCH("WM1250 Output"), }; static struct snd_soc_dapm_widget widgets[] = { SND_SOC_DAPM_HP("Headphone", NULL), SND_SOC_DAPM_MIC("AMIC", NULL), SND_SOC_DAPM_MIC("DMIC", NULL), SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0, bbclk_ev, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), }; static struct snd_soc_dapm_route audio_paths[] = { { "Headphone", NULL, "HPOUT1L" }, { "Headphone", NULL, "HPOUT1R" }, { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */ { "IN1LN", NULL, "AMIC" }, { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */ { "DMIC1DAT", NULL, "DMIC" }, { "DMIC2DAT", NULL, "DMIC" }, { "AIF2CLK", NULL, "Baseband Clock" }, }; static struct snd_soc_jack littlemill_headset; static int littlemill_late_probe(struct snd_soc_card *card) { struct snd_soc_pcm_runtime *rtd; struct snd_soc_component *component; struct snd_soc_dai *aif1_dai; struct snd_soc_dai *aif2_dai; int ret; rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); component = asoc_rtd_to_codec(rtd, 0)->component; aif1_dai = asoc_rtd_to_codec(rtd, 0); rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]); aif2_dai = asoc_rtd_to_cpu(rtd, 0); ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, 32768, SND_SOC_CLOCK_IN); if (ret < 0) return ret; ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2, 32768, SND_SOC_CLOCK_IN); if (ret < 0) return ret; ret = snd_soc_card_jack_new(card, "Headset", SND_JACK_HEADSET | SND_JACK_MECHANICAL | SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2 | SND_JACK_BTN_3 | SND_JACK_BTN_4 | SND_JACK_BTN_5, &littlemill_headset, NULL, 0); if (ret) return ret; /* This will check device compatibility itself */ wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL); /* As will this */ wm8994_mic_detect(component, &littlemill_headset, 1); return 0; } static struct snd_soc_card littlemill = { .name = "Littlemill", .owner = THIS_MODULE, .dai_link = littlemill_dai, .num_links = ARRAY_SIZE(littlemill_dai), .set_bias_level = littlemill_set_bias_level, .set_bias_level_post = littlemill_set_bias_level_post, .controls = controls, .num_controls = ARRAY_SIZE(controls), .dapm_widgets = widgets, .num_dapm_widgets = ARRAY_SIZE(widgets), .dapm_routes = audio_paths, .num_dapm_routes = ARRAY_SIZE(audio_paths), .late_probe = littlemill_late_probe, }; static int littlemill_probe(struct platform_device *pdev) { struct snd_soc_card *card = &littlemill; int ret; card->dev = &pdev->dev; ret = devm_snd_soc_register_card(&pdev->dev, card); if (ret) dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); return ret; } static struct platform_driver littlemill_driver = { .driver = { .name = "littlemill", .pm = &snd_soc_pm_ops, }, .probe = littlemill_probe, }; module_platform_driver(littlemill_driver); MODULE_DESCRIPTION("Littlemill audio support"); MODULE_AUTHOR("Mark Brown "); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:littlemill");