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 22 struct rt9123p_priv { 23 struct gpio_desc *enable; 24 unsigned int enable_delay; 25 int enable_switch; 26 }; 27 28 static 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 60 static 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 74 static 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 80 static const struct snd_soc_dapm_route rt9123p_dapm_routes[] = { 81 {"Amp Drv", NULL, "HiFi Playback"}, 82 {"SPK", NULL, "Amp Drv"}, 83 }; 84 85 static 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 95 static const struct snd_soc_dai_ops rt9123p_dai_ops = { 96 .trigger = rt9123p_daiops_trigger, 97 }; 98 99 static 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 }; 117 118 static 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 144 static const struct of_device_id rt9123p_device_id[] = { 145 { .compatible = "richtek,rt9123p" }, 146 {} 147 }; 148 MODULE_DEVICE_TABLE(of, rt9123p_device_id); 149 #endif 150 151 #ifdef CONFIG_ACPI 152 static const struct acpi_device_id rt9123p_acpi_match[] = { 153 { "RT9123P", 0 }, 154 {} 155 }; 156 MODULE_DEVICE_TABLE(acpi, rt9123p_acpi_match); 157 #endif 158 159 static 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 }; 167 module_platform_driver(rt9123p_platform_driver); 168 169 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 170 MODULE_DESCRIPTION("ASoC rt9123p Driver"); 171 MODULE_LICENSE("GPL"); 172