sound/soc/qcom/apq8016_sbc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/device.h>
   7 #include <linux/module.h>
   8 #include <linux/kernel.h>
   9 #include <linux/io.h>
  10 #include <linux/of.h>
  11 #include <linux/clk.h>
  12 #include <linux/platform_device.h>
  13 #include <sound/pcm.h>
  14 #include <sound/pcm_params.h>
  15 #include <sound/jack.h>
  16 #include <sound/soc.h>
  17 #include <uapi/linux/input-event-codes.h>
  18 #include <dt-bindings/sound/apq8016-lpass.h>
  19
  20 struct apq8016_sbc_data {
  21         void __iomem *mic_iomux;
  22         void __iomem *spkr_iomux;
  23         struct snd_soc_jack jack;
  24         bool jack_setup;
  25         struct snd_soc_dai_link dai_link[];     /* dynamically allocated */
  26 };
  27
  28 #define MIC_CTRL_TER_WS_SLAVE_SEL       BIT(21)
  29 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10    BIT(17)
  30 #define MIC_CTRL_TLMM_SCLK_EN           BIT(1)
  31 #define SPKR_CTL_PRI_WS_SLAVE_SEL_11    (BIT(17) | BIT(16))
  32 #define DEFAULT_MCLK_RATE               9600000
  33
  34 static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
  35 {
  36         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  37         struct snd_soc_component *component;
  38         struct snd_soc_dai_link *dai_link = rtd->dai_link;
  39         struct snd_soc_card *card = rtd->card;
  40         struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
  41         int i, rval;
  42
  43         switch (cpu_dai->id) {
  44         case MI2S_PRIMARY:
  45                 writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
  46                         pdata->spkr_iomux);
  47                 break;
  48
  49         case MI2S_QUATERNARY:
  50                 /* Configure the Quat MI2S to TLMM */
  51                 writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
  52                         MIC_CTRL_TLMM_SCLK_EN,
  53                         pdata->mic_iomux);
  54                 break;
  55         case MI2S_TERTIARY:
  56                 writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
  57                         MIC_CTRL_TLMM_SCLK_EN,
  58                         pdata->mic_iomux);
  59
  60                 break;
  61
  62         default:
  63                 dev_err(card->dev, "unsupported cpu dai configuration\n");
  64                 return -EINVAL;
  65
  66         }
  67
  68         if (!pdata->jack_setup) {
  69                 struct snd_jack *jack;
  70
  71                 rval = snd_soc_card_jack_new(card, "Headset Jack",
  72                                              SND_JACK_HEADSET |
  73                                              SND_JACK_HEADPHONE |
  74                                              SND_JACK_BTN_0 | SND_JACK_BTN_1 |
  75                                              SND_JACK_BTN_2 | SND_JACK_BTN_3 |
  76                                              SND_JACK_BTN_4,
  77                                              &pdata->jack, NULL, 0);
  78
  79                 if (rval < 0) {
  80                         dev_err(card->dev, "Unable to add Headphone Jack\n");
  81                         return rval;
  82                 }
  83
  84                 jack = pdata->jack.jack;
  85
  86                 snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
  87                 snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
  88                 snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
  89                 snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
  90                 pdata->jack_setup = true;
  91         }
  92
  93         for (i = 0 ; i < dai_link->num_codecs; i++) {
  94                 struct snd_soc_dai *dai = rtd->codec_dais[i];
  95
  96                 component = dai->component;
  97                 /* Set default mclk for internal codec */
  98                 rval = snd_soc_component_set_sysclk(component, 0, 0, DEFAULT_MCLK_RATE,
  99                                        SND_SOC_CLOCK_IN);
 100                 if (rval != 0 && rval != -ENOTSUPP) {
 101                         dev_warn(card->dev, "Failed to set mclk: %d\n", rval);
 102                         return rval;
 103                 }
 104                 rval = snd_soc_component_set_jack(component, &pdata->jack, NULL);
 105                 if (rval != 0 && rval != -ENOTSUPP) {
 106                         dev_warn(card->dev, "Failed to set jack: %d\n", rval);
 107                         return rval;
 108                 }
 109         }
 110
 111         return 0;
 112 }
 113
 114 static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
 115 {
 116         struct device *dev = card->dev;
 117         struct snd_soc_dai_link *link;
 118         struct device_node *np, *codec, *cpu, *node  = dev->of_node;
 119         struct apq8016_sbc_data *data;
 120         struct snd_soc_dai_link_component *dlc;
 121         int ret, num_links;
 122
 123         ret = snd_soc_of_parse_card_name(card, "qcom,model");
 124         if (ret) {
 125                 dev_err(dev, "Error parsing card name: %d\n", ret);
 126                 return ERR_PTR(ret);
 127         }
 128
 129         /* DAPM routes */
 130         if (of_property_read_bool(node, "qcom,audio-routing")) {
 131                 ret = snd_soc_of_parse_audio_routing(card,
 132                                         "qcom,audio-routing");
 133                 if (ret)
 134                         return ERR_PTR(ret);
 135         }
 136
 137
 138         /* Populate links */
 139         num_links = of_get_child_count(node);
 140
 141         /* Allocate the private data and the DAI link array */
 142         data = devm_kzalloc(dev,
 143                             struct_size(data, dai_link, num_links),
 144                             GFP_KERNEL);
 145         if (!data)
 146                 return ERR_PTR(-ENOMEM);
 147
 148         card->dai_link  = &data->dai_link[0];
 149         card->num_links = num_links;
 150
 151         link = data->dai_link;
 152
 153         for_each_child_of_node(node, np) {
 154                 dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
 155                 if (!dlc)
 156                         return ERR_PTR(-ENOMEM);
 157
 158                 link->cpus      = &dlc[0];
 159                 link->platforms = &dlc[1];
 160
 161                 link->num_cpus          = 1;
 162                 link->num_platforms     = 1;
 163
 164                 cpu = of_get_child_by_name(np, "cpu");
 165                 codec = of_get_child_by_name(np, "codec");
 166
 167                 if (!cpu || !codec) {
 168                         dev_err(dev, "Can't find cpu/codec DT node\n");
 169                         ret = -EINVAL;
 170                         goto error;
 171                 }
 172
 173                 link->cpus->of_node = of_parse_phandle(cpu, "sound-dai", 0);
 174                 if (!link->cpus->of_node) {
 175                         dev_err(card->dev, "error getting cpu phandle\n");
 176                         ret = -EINVAL;
 177                         goto error;
 178                 }
 179
 180                 ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name);
 181                 if (ret) {
 182                         dev_err(card->dev, "error getting cpu dai name\n");
 183                         goto error;
 184                 }
 185
 186                 ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
 187
 188                 if (ret < 0) {
 189                         dev_err(card->dev, "error getting codec dai name\n");
 190                         goto error;
 191                 }
 192
 193                 link->platforms->of_node = link->cpus->of_node;
 194                 ret = of_property_read_string(np, "link-name", &link->name);
 195                 if (ret) {
 196                         dev_err(card->dev, "error getting codec dai_link name\n");
 197                         goto error;
 198                 }
 199
 200                 link->stream_name = link->name;
 201                 link->init = apq8016_sbc_dai_init;
 202                 link++;
 203
 204                 of_node_put(cpu);
 205                 of_node_put(codec);
 206         }
 207
 208         return data;
 209
 210  error:
 211         of_node_put(np);
 212         of_node_put(cpu);
 213         of_node_put(codec);
 214         return ERR_PTR(ret);
 215 }
 216
 217 static const struct snd_soc_dapm_widget apq8016_sbc_dapm_widgets[] = {
 218
 219         SND_SOC_DAPM_MIC("Handset Mic", NULL),
 220         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 221         SND_SOC_DAPM_MIC("Secondary Mic", NULL),
 222         SND_SOC_DAPM_MIC("Digital Mic1", NULL),
 223         SND_SOC_DAPM_MIC("Digital Mic2", NULL),
 224 };
 225
 226 static int apq8016_sbc_platform_probe(struct platform_device *pdev)
 227 {
 228         struct device *dev = &pdev->dev;
 229         struct snd_soc_card *card;
 230         struct apq8016_sbc_data *data;
 231         struct resource *res;
 232
 233         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 234         if (!card)
 235                 return -ENOMEM;
 236
 237         card->dev = dev;
 238         card->dapm_widgets = apq8016_sbc_dapm_widgets;
 239         card->num_dapm_widgets = ARRAY_SIZE(apq8016_sbc_dapm_widgets);
 240         data = apq8016_sbc_parse_of(card);
 241         if (IS_ERR(data)) {
 242                 dev_err(&pdev->dev, "Error resolving dai links: %ld\n",
 243                         PTR_ERR(data));
 244                 return PTR_ERR(data);
 245         }
 246
 247         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux");
 248         data->mic_iomux = devm_ioremap_resource(dev, res);
 249         if (IS_ERR(data->mic_iomux))
 250                 return PTR_ERR(data->mic_iomux);
 251
 252         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux");
 253         data->spkr_iomux = devm_ioremap_resource(dev, res);
 254         if (IS_ERR(data->spkr_iomux))
 255                 return PTR_ERR(data->spkr_iomux);
 256
 257         snd_soc_card_set_drvdata(card, data);
 258
 259         return devm_snd_soc_register_card(&pdev->dev, card);
 260 }
 261
 262 static const struct of_device_id apq8016_sbc_device_id[]  = {
 263         { .compatible = "qcom,apq8016-sbc-sndcard" },
 264         {},
 265 };
 266 MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
 267
 268 static struct platform_driver apq8016_sbc_platform_driver = {
 269         .driver = {
 270                 .name = "qcom-apq8016-sbc",
 271                 .of_match_table = of_match_ptr(apq8016_sbc_device_id),
 272         },
 273         .probe = apq8016_sbc_platform_probe,
 274 };
 275 module_platform_driver(apq8016_sbc_platform_driver);
 276
 277 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
 278 MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
 279 MODULE_LICENSE("GPL v2");