| John Stultz | a4749bb | 2015-05-08 12:57:36 -0700 | [diff] [blame^] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/device.h> |
| 3 | #include <linux/interrupt.h> |
| 4 | #include <linux/module.h> |
| 5 | #include <linux/platform_device.h> |
| 6 | #include <linux/workqueue.h> |
| 7 | #include <linux/i2c.h> |
| 8 | #include <sound/core.h> |
| 9 | #include <sound/pcm.h> |
| 10 | #include <sound/pcm_params.h> |
| 11 | #include <sound/soc.h> |
| 12 | #include <sound/dmaengine_pcm.h> |
| 13 | #include <sound/simple_card.h> |
| 14 | #include "greybus.h" |
| 15 | #include "gpbridge.h" |
| 16 | #include "audio.h" |
| 17 | |
| 18 | /* |
| 19 | * This is the greybus cpu dai logic. It really doesn't do much |
| 20 | * other then provide the TRIGGER_START/STOP hooks that start |
| 21 | * and stop the timer sending audio data in the pcm logic. |
| 22 | */ |
| 23 | |
| 24 | |
| 25 | static int gb_dai_trigger(struct snd_pcm_substream *substream, int cmd, |
| 26 | struct snd_soc_dai *dai) |
| 27 | { |
| 28 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 29 | struct gb_snd *snd_dev; |
| 30 | |
| 31 | |
| 32 | snd_dev = snd_soc_dai_get_drvdata(rtd->cpu_dai); |
| 33 | |
| 34 | switch (cmd) { |
| 35 | case SNDRV_PCM_TRIGGER_START: |
| 36 | gb_pcm_hrtimer_start(snd_dev); |
| 37 | break; |
| 38 | case SNDRV_PCM_TRIGGER_STOP: |
| 39 | gb_pcm_hrtimer_stop(snd_dev); |
| 40 | break; |
| 41 | default: |
| 42 | return -EINVAL; |
| 43 | } |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | /* |
| 48 | * XXX This is annoying, if we don't have a set_fmt function |
| 49 | * the subsystem returns -ENOTSUPP, which causes applications |
| 50 | * to fail, so add a dummy function here. |
| 51 | */ |
| 52 | static int gb_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) |
| 53 | { |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static const struct snd_soc_dai_ops gb_dai_ops = { |
| 58 | .trigger = gb_dai_trigger, |
| 59 | .set_fmt = gb_dai_set_fmt, |
| 60 | }; |
| 61 | |
| 62 | struct snd_soc_dai_driver gb_cpu_dai = { |
| 63 | .name = "gb-cpu-dai", |
| 64 | .playback = { |
| 65 | .rates = GB_RATES, |
| 66 | .formats = GB_FMTS, |
| 67 | .channels_min = 1, |
| 68 | .channels_max = 2, |
| 69 | }, |
| 70 | .ops = &gb_dai_ops, |
| 71 | }; |
| 72 | |
| 73 | static const struct snd_soc_component_driver gb_soc_component = { |
| 74 | .name = "gb-component", |
| 75 | }; |
| 76 | |
| 77 | static int gb_plat_probe(struct platform_device *pdev) |
| 78 | { |
| 79 | struct gb_snd *snd_dev; |
| 80 | int ret; |
| 81 | |
| 82 | snd_dev = (struct gb_snd *)pdev->dev.platform_data; |
| 83 | dev_set_drvdata(&pdev->dev, snd_dev); |
| 84 | |
| 85 | ret = snd_soc_register_component(&pdev->dev, &gb_soc_component, |
| 86 | &gb_cpu_dai, 1); |
| 87 | return ret; |
| 88 | } |
| 89 | |
| 90 | static int gb_plat_remove(struct platform_device *pdev) |
| 91 | { |
| 92 | snd_soc_unregister_component(&pdev->dev); |
| 93 | snd_soc_unregister_platform(&pdev->dev); |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | struct platform_driver gb_audio_plat_driver = { |
| 98 | .driver = { |
| 99 | .name = "gb-dai-audio", |
| 100 | }, |
| 101 | .probe = gb_plat_probe, |
| 102 | .remove = gb_plat_remove, |
| 103 | }; |