sound/soc/qcom/apq8096.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2018, Linaro Limited
   3
   4 #include <linux/soc/qcom/apr.h>
   5 #include <linux/module.h>
   6 #include <linux/component.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/of_device.h>
   9 #include <sound/soc.h>
  10 #include <sound/soc-dapm.h>
  11 #include <sound/pcm.h>
  12
  13 static int apq8096_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
  14                                       struct snd_pcm_hw_params *params)
  15 {
  16         struct snd_interval *rate = hw_param_interval(params,
  17                                         SNDRV_PCM_HW_PARAM_RATE);
  18         struct snd_interval *channels = hw_param_interval(params,
  19                                         SNDRV_PCM_HW_PARAM_CHANNELS);
  20
  21         rate->min = rate->max = 48000;
  22         channels->min = channels->max = 2;
  23
  24         return 0;
  25 }
  26
  27 static int apq8096_sbc_parse_of(struct snd_soc_card *card)
  28 {
  29         struct device_node *np;
  30         struct device_node *codec = NULL;
  31         struct device_node *platform = NULL;
  32         struct device_node *cpu = NULL;
  33         struct device *dev = card->dev;
  34         struct snd_soc_dai_link *link;
  35         int ret, num_links;
  36
  37         ret = snd_soc_of_parse_card_name(card, "qcom,model");
  38         if (ret) {
  39                 dev_err(dev, "Error parsing card name: %d\n", ret);
  40                 return ret;
  41         }
  42
  43         /* DAPM routes */
  44         if (of_property_read_bool(dev->of_node, "qcom,audio-routing")) {
  45                 ret = snd_soc_of_parse_audio_routing(card,
  46                                         "qcom,audio-routing");
  47                 if (ret)
  48                         return ret;
  49         }
  50
  51         /* Populate links */
  52         num_links = of_get_child_count(dev->of_node);
  53
  54         /* Allocate the DAI link array */
  55         card->dai_link = kcalloc(num_links, sizeof(*link), GFP_KERNEL);
  56         if (!card->dai_link)
  57                 return -ENOMEM;
  58
  59         card->num_links = num_links;
  60         link = card->dai_link;
  61
  62         for_each_child_of_node(dev->of_node, np) {
  63                 cpu = of_get_child_by_name(np, "cpu");
  64                 if (!cpu) {
  65                         dev_err(dev, "Can't find cpu DT node\n");
  66                         ret = -EINVAL;
  67                         goto err;
  68                 }
  69
  70                 link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
  71                 if (!link->cpu_of_node) {
  72                         dev_err(card->dev, "error getting cpu phandle\n");
  73                         ret = -EINVAL;
  74                         goto err;
  75                 }
  76
  77                 ret = snd_soc_of_get_dai_name(cpu, &link->cpu_dai_name);
  78                 if (ret) {
  79                         dev_err(card->dev, "error getting cpu dai name\n");
  80                         goto err;
  81                 }
  82
  83                 platform = of_get_child_by_name(np, "platform");
  84                 codec = of_get_child_by_name(np, "codec");
  85                 if (codec && platform) {
  86                         link->platform_of_node = of_parse_phandle(platform,
  87                                                                   "sound-dai",
  88                                                                    0);
  89                         if (!link->platform_of_node) {
  90                                 dev_err(card->dev, "platform dai not found\n");
  91                                 ret = -EINVAL;
  92                                 goto err;
  93                         }
  94
  95                         ret = snd_soc_of_get_dai_link_codecs(dev, codec, link);
  96                         if (ret < 0) {
  97                                 dev_err(card->dev, "codec dai not found\n");
  98                                 goto err;
  99                         }
 100                         link->no_pcm = 1;
 101                         link->ignore_pmdown_time = 1;
 102                         link->be_hw_params_fixup = apq8096_be_hw_params_fixup;
 103                 } else {
 104                         link->platform_of_node = link->cpu_of_node;
 105                         link->codec_dai_name = "snd-soc-dummy-dai";
 106                         link->codec_name = "snd-soc-dummy";
 107                         link->dynamic = 1;
 108                 }
 109
 110                 link->ignore_suspend = 1;
 111                 ret = of_property_read_string(np, "link-name", &link->name);
 112                 if (ret) {
 113                         dev_err(card->dev, "error getting codec dai_link name\n");
 114                         goto err;
 115                 }
 116
 117                 link->dpcm_playback = 1;
 118                 link->dpcm_capture = 1;
 119                 link->stream_name = link->name;
 120                 link++;
 121         }
 122
 123         return 0;
 124 err:
 125         of_node_put(cpu);
 126         of_node_put(codec);
 127         of_node_put(platform);
 128         kfree(card->dai_link);
 129         return ret;
 130 }
 131
 132 static int apq8096_bind(struct device *dev)
 133 {
 134         struct snd_soc_card *card;
 135         int ret;
 136
 137         card = kzalloc(sizeof(*card), GFP_KERNEL);
 138         if (!card)
 139                 return -ENOMEM;
 140
 141         component_bind_all(dev, card);
 142         card->dev = dev;
 143         ret = apq8096_sbc_parse_of(card);
 144         if (ret) {
 145                 dev_err(dev, "Error parsing OF data\n");
 146                 goto err;
 147         }
 148
 149         ret = snd_soc_register_card(card);
 150         if (ret)
 151                 goto err;
 152
 153         return 0;
 154
 155 err:
 156         component_unbind_all(dev, card);
 157         kfree(card);
 158         return ret;
 159 }
 160
 161 static void apq8096_unbind(struct device *dev)
 162 {
 163         struct snd_soc_card *card = dev_get_drvdata(dev);
 164
 165         snd_soc_unregister_card(card);
 166         component_unbind_all(dev, card);
 167         kfree(card->dai_link);
 168         kfree(card);
 169 }
 170
 171 static const struct component_master_ops apq8096_ops = {
 172         .bind = apq8096_bind,
 173         .unbind = apq8096_unbind,
 174 };
 175
 176 static int apq8016_compare_of(struct device *dev, void *data)
 177 {
 178         return dev->of_node == data;
 179 }
 180
 181 static void apq8016_release_of(struct device *dev, void *data)
 182 {
 183         of_node_put(data);
 184 }
 185
 186 static int add_audio_components(struct device *dev,
 187                                 struct component_match **matchptr)
 188 {
 189         struct device_node *np, *platform, *cpu, *node, *dai_node;
 190
 191         node = dev->of_node;
 192
 193         for_each_child_of_node(node, np) {
 194                 cpu = of_get_child_by_name(np, "cpu");
 195                 if (cpu) {
 196                         dai_node = of_parse_phandle(cpu, "sound-dai", 0);
 197                         of_node_get(dai_node);
 198                         component_match_add_release(dev, matchptr,
 199                                                     apq8016_release_of,
 200                                                     apq8016_compare_of,
 201                                                     dai_node);
 202                 }
 203
 204                 platform = of_get_child_by_name(np, "platform");
 205                 if (platform) {
 206                         dai_node = of_parse_phandle(platform, "sound-dai", 0);
 207                         component_match_add_release(dev, matchptr,
 208                                                     apq8016_release_of,
 209                                                     apq8016_compare_of,
 210                                                     dai_node);
 211                 }
 212         }
 213
 214         return 0;
 215 }
 216
 217 static int apq8096_platform_probe(struct platform_device *pdev)
 218 {
 219         struct component_match *match = NULL;
 220         int ret;
 221
 222         ret = add_audio_components(&pdev->dev, &match);
 223         if (ret)
 224                 return ret;
 225
 226         return component_master_add_with_match(&pdev->dev, &apq8096_ops, match);
 227 }
 228
 229 static int apq8096_platform_remove(struct platform_device *pdev)
 230 {
 231         component_master_del(&pdev->dev, &apq8096_ops);
 232
 233         return 0;
 234 }
 235
 236 static const struct of_device_id msm_snd_apq8096_dt_match[] = {
 237         {.compatible = "qcom,apq8096-sndcard"},
 238         {}
 239 };
 240
 241 MODULE_DEVICE_TABLE(of, msm_snd_apq8096_dt_match);
 242
 243 static struct platform_driver msm_snd_apq8096_driver = {
 244         .probe  = apq8096_platform_probe,
 245         .remove = apq8096_platform_remove,
 246         .driver = {
 247                 .name = "msm-snd-apq8096",
 248                 .owner = THIS_MODULE,
 249                 .of_match_table = msm_snd_apq8096_dt_match,
 250         },
 251 };
 252 module_platform_driver(msm_snd_apq8096_driver);
 253 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
 254 MODULE_DESCRIPTION("APQ8096 ASoC Machine Driver");
 255 MODULE_LICENSE("GPL v2");