sound/soc/qcom/apq8016_sbc.c

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