soc/samsung/littlemill.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 //
0003 // Littlemill audio support
0004 //
0005 // Copyright 2011 Wolfson Microelectronics
0006
0007 #include <sound/soc.h>
0008 #include <sound/soc-dapm.h>
0009 #include <sound/jack.h>
0010 #include <linux/gpio.h>
0011 #include <linux/module.h>
0012
0013 #include "../codecs/wm8994.h"
0014
0015 static int sample_rate = 44100;
0016
0017 static int littlemill_set_bias_level(struct snd_soc_card *card,
0018                       struct snd_soc_dapm_context *dapm,
0019                       enum snd_soc_bias_level level)
0020 {
0021     struct snd_soc_pcm_runtime *rtd;
0022     struct snd_soc_dai *aif1_dai;
0023     int ret;
0024
0025     rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
0026     aif1_dai = asoc_rtd_to_codec(rtd, 0);
0027
0028     if (dapm->dev != aif1_dai->dev)
0029         return 0;
0030
0031     switch (level) {
0032     case SND_SOC_BIAS_PREPARE:
0033         /*
0034          * If we've not already clocked things via hw_params()
0035          * then do so now, otherwise these are noops.
0036          */
0037         if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
0038             ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
0039                           WM8994_FLL_SRC_MCLK2, 32768,
0040                           sample_rate * 512);
0041             if (ret < 0) {
0042                 pr_err("Failed to start FLL: %d\n", ret);
0043                 return ret;
0044             }
0045
0046             ret = snd_soc_dai_set_sysclk(aif1_dai,
0047                              WM8994_SYSCLK_FLL1,
0048                              sample_rate * 512,
0049                              SND_SOC_CLOCK_IN);
0050             if (ret < 0) {
0051                 pr_err("Failed to set SYSCLK: %d\n", ret);
0052                 return ret;
0053             }
0054         }
0055         break;
0056
0057     default:
0058         break;
0059     }
0060
0061     return 0;
0062 }
0063
0064 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
0065                            struct snd_soc_dapm_context *dapm,
0066                            enum snd_soc_bias_level level)
0067 {
0068     struct snd_soc_pcm_runtime *rtd;
0069     struct snd_soc_dai *aif1_dai;
0070     int ret;
0071
0072     rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
0073     aif1_dai = asoc_rtd_to_codec(rtd, 0);
0074
0075     if (dapm->dev != aif1_dai->dev)
0076         return 0;
0077
0078     switch (level) {
0079     case SND_SOC_BIAS_STANDBY:
0080         ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
0081                          32768, SND_SOC_CLOCK_IN);
0082         if (ret < 0) {
0083             pr_err("Failed to switch away from FLL1: %d\n", ret);
0084             return ret;
0085         }
0086
0087         ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
0088                       0, 0, 0);
0089         if (ret < 0) {
0090             pr_err("Failed to stop FLL1: %d\n", ret);
0091             return ret;
0092         }
0093         break;
0094
0095     default:
0096         break;
0097     }
0098
0099     dapm->bias_level = level;
0100
0101     return 0;
0102 }
0103
0104 static int littlemill_hw_params(struct snd_pcm_substream *substream,
0105                 struct snd_pcm_hw_params *params)
0106 {
0107     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0108     struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
0109     int ret;
0110
0111     sample_rate = params_rate(params);
0112
0113     ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
0114                   WM8994_FLL_SRC_MCLK2, 32768,
0115                   sample_rate * 512);
0116     if (ret < 0) {
0117         pr_err("Failed to start FLL: %d\n", ret);
0118         return ret;
0119     }
0120
0121     ret = snd_soc_dai_set_sysclk(codec_dai,
0122                      WM8994_SYSCLK_FLL1,
0123                      sample_rate * 512,
0124                      SND_SOC_CLOCK_IN);
0125     if (ret < 0) {
0126         pr_err("Failed to set SYSCLK: %d\n", ret);
0127         return ret;
0128     }
0129
0130     return 0;
0131 }
0132
0133 static const struct snd_soc_ops littlemill_ops = {
0134     .hw_params = littlemill_hw_params,
0135 };
0136
0137 static const struct snd_soc_pcm_stream baseband_params = {
0138     .formats = SNDRV_PCM_FMTBIT_S32_LE,
0139     .rate_min = 8000,
0140     .rate_max = 8000,
0141     .channels_min = 2,
0142     .channels_max = 2,
0143 };
0144
0145 SND_SOC_DAILINK_DEFS(cpu,
0146     DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
0147     DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
0148     DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
0149
0150 SND_SOC_DAILINK_DEFS(baseband,
0151     DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
0152     DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
0153                       "wm1250-ev1")));
0154
0155 static struct snd_soc_dai_link littlemill_dai[] = {
0156     {
0157         .name = "CPU",
0158         .stream_name = "CPU",
0159         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
0160                 | SND_SOC_DAIFMT_CBM_CFM,
0161         .ops = &littlemill_ops,
0162         SND_SOC_DAILINK_REG(cpu),
0163     },
0164     {
0165         .name = "Baseband",
0166         .stream_name = "Baseband",
0167         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
0168                 | SND_SOC_DAIFMT_CBM_CFM,
0169         .ignore_suspend = 1,
0170         .params = &baseband_params,
0171         SND_SOC_DAILINK_REG(baseband),
0172     },
0173 };
0174
0175 static int bbclk_ev(struct snd_soc_dapm_widget *w,
0176             struct snd_kcontrol *kcontrol, int event)
0177 {
0178     struct snd_soc_card *card = w->dapm->card;
0179     struct snd_soc_pcm_runtime *rtd;
0180     struct snd_soc_dai *aif2_dai;
0181     int ret;
0182
0183     rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
0184     aif2_dai = asoc_rtd_to_cpu(rtd, 0);
0185
0186     switch (event) {
0187     case SND_SOC_DAPM_PRE_PMU:
0188         ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
0189                       WM8994_FLL_SRC_BCLK, 64 * 8000,
0190                       8000 * 256);
0191         if (ret < 0) {
0192             pr_err("Failed to start FLL: %d\n", ret);
0193             return ret;
0194         }
0195
0196         ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
0197                          8000 * 256,
0198                          SND_SOC_CLOCK_IN);
0199         if (ret < 0) {
0200             pr_err("Failed to set SYSCLK: %d\n", ret);
0201             return ret;
0202         }
0203         break;
0204     case SND_SOC_DAPM_POST_PMD:
0205         ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
0206                          32768, SND_SOC_CLOCK_IN);
0207         if (ret < 0) {
0208             pr_err("Failed to switch away from FLL2: %d\n", ret);
0209             return ret;
0210         }
0211
0212         ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
0213                       0, 0, 0);
0214         if (ret < 0) {
0215             pr_err("Failed to stop FLL2: %d\n", ret);
0216             return ret;
0217         }
0218         break;
0219     default:
0220         return -EINVAL;
0221     }
0222
0223     return 0;
0224 }
0225
0226 static const struct snd_kcontrol_new controls[] = {
0227     SOC_DAPM_PIN_SWITCH("WM1250 Input"),
0228     SOC_DAPM_PIN_SWITCH("WM1250 Output"),
0229 };
0230
0231 static const struct snd_soc_dapm_widget widgets[] = {
0232     SND_SOC_DAPM_HP("Headphone", NULL),
0233
0234     SND_SOC_DAPM_MIC("AMIC", NULL),
0235     SND_SOC_DAPM_MIC("DMIC", NULL),
0236
0237     SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
0238                   bbclk_ev,
0239                   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
0240 };
0241
0242 static const struct snd_soc_dapm_route audio_paths[] = {
0243     { "Headphone", NULL, "HPOUT1L" },
0244     { "Headphone", NULL, "HPOUT1R" },
0245
0246     { "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
0247     { "IN1LN", NULL, "AMIC" },
0248
0249     { "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
0250     { "DMIC1DAT", NULL, "DMIC" },
0251     { "DMIC2DAT", NULL, "DMIC" },
0252
0253     { "AIF2CLK", NULL, "Baseband Clock" },
0254 };
0255
0256 static struct snd_soc_jack littlemill_headset;
0257
0258 static int littlemill_late_probe(struct snd_soc_card *card)
0259 {
0260     struct snd_soc_pcm_runtime *rtd;
0261     struct snd_soc_component *component;
0262     struct snd_soc_dai *aif1_dai;
0263     struct snd_soc_dai *aif2_dai;
0264     int ret;
0265
0266     rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
0267     component = asoc_rtd_to_codec(rtd, 0)->component;
0268     aif1_dai = asoc_rtd_to_codec(rtd, 0);
0269
0270     rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
0271     aif2_dai = asoc_rtd_to_cpu(rtd, 0);
0272
0273     ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
0274                      32768, SND_SOC_CLOCK_IN);
0275     if (ret < 0)
0276         return ret;
0277
0278     ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
0279                      32768, SND_SOC_CLOCK_IN);
0280     if (ret < 0)
0281         return ret;
0282
0283     ret = snd_soc_card_jack_new(card, "Headset",
0284                     SND_JACK_HEADSET | SND_JACK_MECHANICAL |
0285                     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
0286                     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
0287                     SND_JACK_BTN_4 | SND_JACK_BTN_5,
0288                     &littlemill_headset);
0289     if (ret)
0290         return ret;
0291
0292     /* This will check device compatibility itself */
0293     wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);
0294
0295     /* As will this */
0296     wm8994_mic_detect(component, &littlemill_headset, 1);
0297
0298     return 0;
0299 }
0300
0301 static struct snd_soc_card littlemill = {
0302     .name = "Littlemill",
0303     .owner = THIS_MODULE,
0304     .dai_link = littlemill_dai,
0305     .num_links = ARRAY_SIZE(littlemill_dai),
0306
0307     .set_bias_level = littlemill_set_bias_level,
0308     .set_bias_level_post = littlemill_set_bias_level_post,
0309
0310     .controls = controls,
0311     .num_controls = ARRAY_SIZE(controls),
0312     .dapm_widgets = widgets,
0313     .num_dapm_widgets = ARRAY_SIZE(widgets),
0314     .dapm_routes = audio_paths,
0315     .num_dapm_routes = ARRAY_SIZE(audio_paths),
0316
0317     .late_probe = littlemill_late_probe,
0318 };
0319
0320 static int littlemill_probe(struct platform_device *pdev)
0321 {
0322     struct snd_soc_card *card = &littlemill;
0323     int ret;
0324
0325     card->dev = &pdev->dev;
0326
0327     ret = devm_snd_soc_register_card(&pdev->dev, card);
0328     if (ret)
0329         dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");
0330
0331     return ret;
0332 }
0333
0334 static struct platform_driver littlemill_driver = {
0335     .driver = {
0336         .name = "littlemill",
0337         .pm = &snd_soc_pm_ops,
0338     },
0339     .probe = littlemill_probe,
0340 };
0341
0342 module_platform_driver(littlemill_driver);
0343
0344 MODULE_DESCRIPTION("Littlemill audio support");
0345 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
0346 MODULE_LICENSE("GPL");
0347 MODULE_ALIAS("platform:littlemill");