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/soc.h>
  25 #include <dt-bindings/sound/apq8016-lpass.h>
  26
  27 struct apq8016_sbc_data {
  28         void __iomem *mic_iomux;
  29         void __iomem *spkr_iomux;
  30         struct snd_soc_dai_link dai_link[];     /* dynamically allocated */
  31 };
  32
  33 #define MIC_CTRL_TER_WS_SLAVE_SEL       BIT(21)
  34 #define MIC_CTRL_QUA_WS_SLAVE_SEL_10    BIT(17)
  35 #define MIC_CTRL_TLMM_SCLK_EN           BIT(1)
  36 #define SPKR_CTL_PRI_WS_SLAVE_SEL_11    (BIT(17) | BIT(16))
  37
  38 static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
  39 {
  40         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  41         struct snd_soc_card *card = rtd->card;
  42         struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
  43         int rval = 0;
  44
  45         switch (cpu_dai->id) {
  46         case MI2S_PRIMARY:
  47                 writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
  48                         pdata->spkr_iomux);
  49                 break;
  50
  51         case MI2S_QUATERNARY:
  52                 /* Configure the Quat MI2S to TLMM */
  53                 writel(readl(pdata->mic_iomux) | MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
  54                         MIC_CTRL_TLMM_SCLK_EN,
  55                         pdata->mic_iomux);
  56                 break;
  57         case MI2S_TERTIARY:
  58                 writel(readl(pdata->mic_iomux) | MIC_CTRL_TER_WS_SLAVE_SEL |
  59                         MIC_CTRL_TLMM_SCLK_EN,
  60                         pdata->mic_iomux);
  61
  62                 break;
  63
  64         default:
  65                 dev_err(card->dev, "unsupported cpu dai configuration\n");
  66                 rval = -EINVAL;
  67                 break;
  68
  69         }
  70
  71         return rval;
  72 }
  73
  74 static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
  75 {
  76         struct device *dev = card->dev;
  77         struct snd_soc_dai_link *link;
  78         struct device_node *np, *codec, *cpu, *node  = dev->of_node;
  79         struct apq8016_sbc_data *data;
  80         int ret, num_links;
  81
  82         ret = snd_soc_of_parse_card_name(card, "qcom,model");
  83         if (ret) {
  84                 dev_err(dev, "Error parsing card name: %d\n", ret);
  85                 return ERR_PTR(ret);
  86         }
  87
  88         /* Populate links */
  89         num_links = of_get_child_count(node);
  90
  91         /* Allocate the private data and the DAI link array */
  92         data = devm_kzalloc(dev, sizeof(*data) + sizeof(*link) * num_links,
  93                             GFP_KERNEL);
  94         if (!data)
  95                 return ERR_PTR(-ENOMEM);
  96
  97         card->dai_link  = &data->dai_link[0];
  98         card->num_links = num_links;
  99
 100         link = data->dai_link;
 101
 102         for_each_child_of_node(node, np) {
 103                 cpu = of_get_child_by_name(np, "cpu");
 104                 codec = of_get_child_by_name(np, "codec");
 105
 106                 if (!cpu || !codec) {
 107                         dev_err(dev, "Can't find cpu/codec DT node\n");
 108                         return ERR_PTR(-EINVAL);
 109                 }
 110
 111                 link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
 112                 if (!link->cpu_of_node) {
 113                         dev_err(card->dev, "error getting cpu phandle\n");
 114                         return ERR_PTR(-EINVAL);
 115                 }
 116
 117                 link->codec_of_node = of_parse_phandle(codec, "sound-dai", 0);
 118                 if (!link->codec_of_node) {
 119                         dev_err(card->dev, "error getting codec phandle\n");
 120                         return ERR_PTR(-EINVAL);
 121                 }
 122
 123                 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
 124                 if (ret) {
 125                         dev_err(card->dev, "error getting cpu dai name\n");
 126                         return ERR_PTR(ret);
 127                 }
 128
 129                 ret = snd_soc_of_get_dai_name(codec, &link->codec_dai_name);
 130                 if (ret) {
 131                         dev_err(card->dev, "error getting codec dai name\n");
 132                         return ERR_PTR(ret);
 133                 }
 134
 135                 link->platform_of_node = link->cpu_of_node;
 136                 ret = of_property_read_string(np, "link-name", &link->name);
 137                 if (ret) {
 138                         dev_err(card->dev, "error getting codec dai_link name\n");
 139                         return ERR_PTR(ret);
 140                 }
 141
 142                 link->stream_name = link->name;
 143                 link->init = apq8016_sbc_dai_init;
 144                 link++;
 145         }
 146
 147         return data;
 148 }
 149
 150 static int apq8016_sbc_platform_probe(struct platform_device *pdev)
 151 {
 152         struct device *dev = &pdev->dev;
 153         struct snd_soc_card *card;
 154         struct apq8016_sbc_data *data;
 155         struct resource *res;
 156
 157         card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
 158         if (!card)
 159                 return -ENOMEM;
 160
 161         card->dev = dev;
 162         data = apq8016_sbc_parse_of(card);
 163         if (IS_ERR(data)) {
 164                 dev_err(&pdev->dev, "Error resolving dai links: %ld\n",
 165                         PTR_ERR(data));
 166                 return PTR_ERR(data);
 167         }
 168
 169         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux");
 170         data->mic_iomux = devm_ioremap_resource(dev, res);
 171         if (IS_ERR(data->mic_iomux))
 172                 return PTR_ERR(data->mic_iomux);
 173
 174         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux");
 175         data->spkr_iomux = devm_ioremap_resource(dev, res);
 176         if (IS_ERR(data->spkr_iomux))
 177                 return PTR_ERR(data->spkr_iomux);
 178
 179         platform_set_drvdata(pdev, data);
 180         snd_soc_card_set_drvdata(card, data);
 181
 182         return devm_snd_soc_register_card(&pdev->dev, card);
 183 }
 184
 185 static const struct of_device_id apq8016_sbc_device_id[]  = {
 186         { .compatible = "qcom,apq8016-sbc-sndcard" },
 187         {},
 188 };
 189 MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
 190
 191 static struct platform_driver apq8016_sbc_platform_driver = {
 192         .driver = {
 193                 .name = "qcom-apq8016-sbc",
 194                 .of_match_table = of_match_ptr(apq8016_sbc_device_id),
 195         },
 196         .probe = apq8016_sbc_platform_probe,
 197 };
 198 module_platform_driver(apq8016_sbc_platform_driver);
 199
 200 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
 201 MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
 202 MODULE_LICENSE("GPL v2");