rt9123p.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2//
  3// rt9123p.c -- RT9123 (HW Mode) ALSA SoC Codec driver
  4//
  5// Author: ChiYuan Huang <cy_huang@richtek.com>
  6
  7#include <linux/acpi.h>
  8#include <linux/delay.h>
  9#include <linux/err.h>
 10#include <linux/gpio/consumer.h>
 11#include <linux/kernel.h>
 12#include <linux/mod_devicetable.h>
 13#include <linux/module.h>
 14#include <linux/of.h>
 15#include <linux/platform_device.h>
 16#include <linux/property.h>
 17#include <sound/pcm.h>
 18#include <sound/soc.h>
 19#include <sound/soc-dai.h>
 20#include <sound/soc-dapm.h>
 21
 22struct rt9123p_priv {
 23	struct gpio_desc *enable;
 24	unsigned int enable_delay;
 25	int enable_switch;
 26};
 27
 28static int rt9123p_daiops_trigger(struct snd_pcm_substream *substream, int cmd,
 29				  struct snd_soc_dai *dai)
 30{
 31	struct snd_soc_component *comp = dai->component;
 32	struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp);
 33
 34	if (!rt9123p->enable)
 35		return 0;
 36
 37	switch (cmd) {
 38	case SNDRV_PCM_TRIGGER_START:
 39	case SNDRV_PCM_TRIGGER_RESUME:
 40	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 41		mdelay(rt9123p->enable_delay);
 42		if (rt9123p->enable_switch) {
 43			gpiod_set_value(rt9123p->enable, 1);
 44			dev_dbg(comp->dev, "set enable to 1");
 45		}
 46		break;
 47	case SNDRV_PCM_TRIGGER_STOP:
 48	case SNDRV_PCM_TRIGGER_SUSPEND:
 49	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 50		gpiod_set_value(rt9123p->enable, 0);
 51		dev_dbg(comp->dev, "set enable to 0");
 52		break;
 53	default:
 54		break;
 55	}
 56
 57	return 0;
 58}
 59
 60static int rt9123p_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol,
 61				int event)
 62{
 63	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
 64	struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp);
 65
 66	if (event & SND_SOC_DAPM_POST_PMU)
 67		rt9123p->enable_switch = 1;
 68	else if (event & SND_SOC_DAPM_POST_PMD)
 69		rt9123p->enable_switch = 0;
 70
 71	return 0;
 72}
 73
 74static const struct snd_soc_dapm_widget rt9123p_dapm_widgets[] = {
 75	SND_SOC_DAPM_OUTPUT("SPK"),
 76	SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rt9123p_enable_event,
 77			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
 78};
 79
 80static const struct snd_soc_dapm_route rt9123p_dapm_routes[] = {
 81	{"Amp Drv", NULL, "HiFi Playback"},
 82	{"SPK", NULL, "Amp Drv"},
 83};
 84
 85static const struct snd_soc_component_driver rt9123p_comp_driver = {
 86	.dapm_widgets		= rt9123p_dapm_widgets,
 87	.num_dapm_widgets	= ARRAY_SIZE(rt9123p_dapm_widgets),
 88	.dapm_routes		= rt9123p_dapm_routes,
 89	.num_dapm_routes	= ARRAY_SIZE(rt9123p_dapm_routes),
 90	.idle_bias_on		= 1,
 91	.use_pmdown_time	= 1,
 92	.endianness		= 1,
 93};
 94
 95static const struct snd_soc_dai_ops rt9123p_dai_ops = {
 96	.trigger        = rt9123p_daiops_trigger,
 97};
 98
 99static struct snd_soc_dai_driver rt9123p_dai_driver = {
100	.name = "HiFi",
101	.playback = {
102		.stream_name	= "HiFi Playback",
103		.formats	= SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 |
104				  SNDRV_PCM_FMTBIT_S32,
105		.rates		= SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
106				  SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_24000 |
107				  SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
108				  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
109				  SNDRV_PCM_RATE_96000,
110		.rate_min	= 8000,
111		.rate_max	= 96000,
112		.channels_min	= 1,
113		.channels_max	= 2,
114	},
115	.ops    = &rt9123p_dai_ops,
116};
117
118static int rt9123p_platform_probe(struct platform_device *pdev)
119{
120	struct device *dev = &pdev->dev;
121	struct rt9123p_priv *rt9123p;
122	int ret;
123
124	rt9123p = devm_kzalloc(dev, sizeof(*rt9123p), GFP_KERNEL);
125	if (!rt9123p)
126		return -ENOMEM;
127
128	rt9123p->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
129	if (IS_ERR(rt9123p->enable))
130		return PTR_ERR(rt9123p->enable);
131
132	ret = device_property_read_u32(dev, "enable-delay-ms", &rt9123p->enable_delay);
133	if (ret) {
134		rt9123p->enable_delay = 0;
135		dev_dbg(dev, "no optional property 'enable-delay-ms' found, default: no delay\n");
136	}
137
138	platform_set_drvdata(pdev, rt9123p);
139
140	return devm_snd_soc_register_component(dev, &rt9123p_comp_driver, &rt9123p_dai_driver, 1);
141}
142
143#ifdef CONFIG_OF
144static const struct of_device_id rt9123p_device_id[] = {
145	{ .compatible = "richtek,rt9123p" },
146	{}
147};
148MODULE_DEVICE_TABLE(of, rt9123p_device_id);
149#endif
150
151#ifdef CONFIG_ACPI
152static const struct acpi_device_id rt9123p_acpi_match[] = {
153	{ "RT9123P", 0 },
154	{}
155};
156MODULE_DEVICE_TABLE(acpi, rt9123p_acpi_match);
157#endif
158
159static struct platform_driver rt9123p_platform_driver = {
160	.driver = {
161		.name = "rt9123p",
162		.of_match_table = of_match_ptr(rt9123p_device_id),
163		.acpi_match_table = ACPI_PTR(rt9123p_acpi_match),
164	},
165	.probe	= rt9123p_platform_probe,
166};
167module_platform_driver(rt9123p_platform_driver);
168
169MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
170MODULE_DESCRIPTION("ASoC rt9123p Driver");
171MODULE_LICENSE("GPL");