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