197fb5e8dSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2af5adf12SKenneth Westfield /* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. 3af5adf12SKenneth Westfield * 4af5adf12SKenneth Westfield * max98357a.c -- MAX98357A ALSA SoC Codec driver 5af5adf12SKenneth Westfield */ 6af5adf12SKenneth Westfield 75c27087eSRohit Ainapure #include <linux/acpi.h> 808d0a55cSKenneth Westfield #include <linux/device.h> 908d0a55cSKenneth Westfield #include <linux/err.h> 10af5adf12SKenneth Westfield #include <linux/gpio.h> 115c8be987SVincent Stehlé #include <linux/gpio/consumer.h> 1208d0a55cSKenneth Westfield #include <linux/kernel.h> 1308d0a55cSKenneth Westfield #include <linux/mod_devicetable.h> 1408d0a55cSKenneth Westfield #include <linux/module.h> 1508d0a55cSKenneth Westfield #include <linux/of.h> 1608d0a55cSKenneth Westfield #include <linux/platform_device.h> 1708d0a55cSKenneth Westfield #include <sound/pcm.h> 18af5adf12SKenneth Westfield #include <sound/soc.h> 1908d0a55cSKenneth Westfield #include <sound/soc-dai.h> 2008d0a55cSKenneth Westfield #include <sound/soc-dapm.h> 21af5adf12SKenneth Westfield 22cec5b01fSMac Chiang struct max98357a_priv { 23cec5b01fSMac Chiang struct delayed_work enable_sdmode_work; 24cec5b01fSMac Chiang struct gpio_desc *sdmode; 25cec5b01fSMac Chiang unsigned int sdmode_delay; 26cec5b01fSMac Chiang }; 27cec5b01fSMac Chiang 28cec5b01fSMac Chiang static void max98357a_enable_sdmode_work(struct work_struct *work) 29cec5b01fSMac Chiang { 30cec5b01fSMac Chiang struct max98357a_priv *max98357a = 31cec5b01fSMac Chiang container_of(work, struct max98357a_priv, 32cec5b01fSMac Chiang enable_sdmode_work.work); 33cec5b01fSMac Chiang 34cec5b01fSMac Chiang gpiod_set_value(max98357a->sdmode, 1); 35cec5b01fSMac Chiang } 36cec5b01fSMac Chiang 37af5adf12SKenneth Westfield static int max98357a_daiops_trigger(struct snd_pcm_substream *substream, 38af5adf12SKenneth Westfield int cmd, struct snd_soc_dai *dai) 39af5adf12SKenneth Westfield { 40cec5b01fSMac Chiang struct max98357a_priv *max98357a = snd_soc_dai_get_drvdata(dai); 41af5adf12SKenneth Westfield 42cec5b01fSMac Chiang if (!max98357a->sdmode) 435119222fSAnatol Pomozov return 0; 445119222fSAnatol Pomozov 45af5adf12SKenneth Westfield switch (cmd) { 46af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_START: 47af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_RESUME: 48af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 49cec5b01fSMac Chiang queue_delayed_work(system_power_efficient_wq, 50cec5b01fSMac Chiang &max98357a->enable_sdmode_work, 51cec5b01fSMac Chiang msecs_to_jiffies(max98357a->sdmode_delay)); 52af5adf12SKenneth Westfield break; 53af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_STOP: 54af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_SUSPEND: 55af5adf12SKenneth Westfield case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 56cec5b01fSMac Chiang cancel_delayed_work_sync(&max98357a->enable_sdmode_work); 57cec5b01fSMac Chiang gpiod_set_value(max98357a->sdmode, 0); 58af5adf12SKenneth Westfield break; 59af5adf12SKenneth Westfield } 60af5adf12SKenneth Westfield 61af5adf12SKenneth Westfield return 0; 62af5adf12SKenneth Westfield } 63af5adf12SKenneth Westfield 64af5adf12SKenneth Westfield static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = { 65af5adf12SKenneth Westfield SND_SOC_DAPM_OUTPUT("Speaker"), 66af5adf12SKenneth Westfield }; 67af5adf12SKenneth Westfield 68af5adf12SKenneth Westfield static const struct snd_soc_dapm_route max98357a_dapm_routes[] = { 69508e6195SAnatol Pomozov {"Speaker", NULL, "HiFi Playback"}, 70af5adf12SKenneth Westfield }; 71af5adf12SKenneth Westfield 724b51e9f1SKuninori Morimoto static const struct snd_soc_component_driver max98357a_component_driver = { 73af5adf12SKenneth Westfield .dapm_widgets = max98357a_dapm_widgets, 74af5adf12SKenneth Westfield .num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets), 75af5adf12SKenneth Westfield .dapm_routes = max98357a_dapm_routes, 76af5adf12SKenneth Westfield .num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes), 774b51e9f1SKuninori Morimoto .idle_bias_on = 1, 784b51e9f1SKuninori Morimoto .use_pmdown_time = 1, 794b51e9f1SKuninori Morimoto .endianness = 1, 804b51e9f1SKuninori Morimoto .non_legacy_dai_naming = 1, 81af5adf12SKenneth Westfield }; 82af5adf12SKenneth Westfield 8364793047SAxel Lin static const struct snd_soc_dai_ops max98357a_dai_ops = { 84af5adf12SKenneth Westfield .trigger = max98357a_daiops_trigger, 85af5adf12SKenneth Westfield }; 86af5adf12SKenneth Westfield 87af5adf12SKenneth Westfield static struct snd_soc_dai_driver max98357a_dai_driver = { 8892b2ad2cSKenneth Westfield .name = "HiFi", 89af5adf12SKenneth Westfield .playback = { 9092b2ad2cSKenneth Westfield .stream_name = "HiFi Playback", 91af5adf12SKenneth Westfield .formats = SNDRV_PCM_FMTBIT_S16 | 92af5adf12SKenneth Westfield SNDRV_PCM_FMTBIT_S24 | 93af5adf12SKenneth Westfield SNDRV_PCM_FMTBIT_S32, 94af5adf12SKenneth Westfield .rates = SNDRV_PCM_RATE_8000 | 95af5adf12SKenneth Westfield SNDRV_PCM_RATE_16000 | 96fdf34366SJerome Brunet SNDRV_PCM_RATE_32000 | 97fdf34366SJerome Brunet SNDRV_PCM_RATE_44100 | 98af5adf12SKenneth Westfield SNDRV_PCM_RATE_48000 | 99fdf34366SJerome Brunet SNDRV_PCM_RATE_88200 | 100af5adf12SKenneth Westfield SNDRV_PCM_RATE_96000, 101af5adf12SKenneth Westfield .rate_min = 8000, 102af5adf12SKenneth Westfield .rate_max = 96000, 103af5adf12SKenneth Westfield .channels_min = 1, 104af5adf12SKenneth Westfield .channels_max = 2, 105af5adf12SKenneth Westfield }, 106af5adf12SKenneth Westfield .ops = &max98357a_dai_ops, 107af5adf12SKenneth Westfield }; 108af5adf12SKenneth Westfield 109af5adf12SKenneth Westfield static int max98357a_platform_probe(struct platform_device *pdev) 110af5adf12SKenneth Westfield { 111cec5b01fSMac Chiang struct max98357a_priv *max98357a; 112cec5b01fSMac Chiang int ret; 113bcd93822STzung-Bi Shih 114cec5b01fSMac Chiang max98357a = devm_kzalloc(&pdev->dev, sizeof(*max98357a), GFP_KERNEL); 115cec5b01fSMac Chiang 116cec5b01fSMac Chiang if (!max98357a) 117cec5b01fSMac Chiang return -ENOMEM; 118cec5b01fSMac Chiang 119cec5b01fSMac Chiang max98357a->sdmode = devm_gpiod_get_optional(&pdev->dev, 120bcd93822STzung-Bi Shih "sdmode", GPIOD_OUT_LOW); 121bcd93822STzung-Bi Shih 122cec5b01fSMac Chiang if (IS_ERR(max98357a->sdmode)) 123cec5b01fSMac Chiang return PTR_ERR(max98357a->sdmode); 124cec5b01fSMac Chiang 125cec5b01fSMac Chiang ret = device_property_read_u32(&pdev->dev, "sdmode-delay", 126cec5b01fSMac Chiang &max98357a->sdmode_delay); 127cec5b01fSMac Chiang 128cec5b01fSMac Chiang if (ret) { 129cec5b01fSMac Chiang max98357a->sdmode_delay = 0; 130cec5b01fSMac Chiang dev_dbg(&pdev->dev, 131cec5b01fSMac Chiang "no optional property 'sdmode-delay' found, default: no delay\n"); 132cec5b01fSMac Chiang } 133cec5b01fSMac Chiang 134cec5b01fSMac Chiang dev_set_drvdata(&pdev->dev, max98357a); 135cec5b01fSMac Chiang 136cec5b01fSMac Chiang INIT_DELAYED_WORK(&max98357a->enable_sdmode_work, 137cec5b01fSMac Chiang max98357a_enable_sdmode_work); 138bcd93822STzung-Bi Shih 1394b51e9f1SKuninori Morimoto return devm_snd_soc_register_component(&pdev->dev, 1404b51e9f1SKuninori Morimoto &max98357a_component_driver, 141af5adf12SKenneth Westfield &max98357a_dai_driver, 1); 142af5adf12SKenneth Westfield } 143af5adf12SKenneth Westfield 144af5adf12SKenneth Westfield #ifdef CONFIG_OF 145af5adf12SKenneth Westfield static const struct of_device_id max98357a_device_id[] = { 1467ff5eabcSKenneth Westfield { .compatible = "maxim,max98357a" }, 147af5adf12SKenneth Westfield {} 148af5adf12SKenneth Westfield }; 1493efa130dSMark Brown MODULE_DEVICE_TABLE(of, max98357a_device_id); 150af5adf12SKenneth Westfield #endif 151af5adf12SKenneth Westfield 1525c27087eSRohit Ainapure #ifdef CONFIG_ACPI 1535c27087eSRohit Ainapure static const struct acpi_device_id max98357a_acpi_match[] = { 1545c27087eSRohit Ainapure { "MX98357A", 0 }, 1555c27087eSRohit Ainapure {}, 1565c27087eSRohit Ainapure }; 1575c27087eSRohit Ainapure MODULE_DEVICE_TABLE(acpi, max98357a_acpi_match); 1585c27087eSRohit Ainapure #endif 1595c27087eSRohit Ainapure 160af5adf12SKenneth Westfield static struct platform_driver max98357a_platform_driver = { 161af5adf12SKenneth Westfield .driver = { 1627ff5eabcSKenneth Westfield .name = "max98357a", 163af5adf12SKenneth Westfield .of_match_table = of_match_ptr(max98357a_device_id), 1645c27087eSRohit Ainapure .acpi_match_table = ACPI_PTR(max98357a_acpi_match), 165af5adf12SKenneth Westfield }, 166af5adf12SKenneth Westfield .probe = max98357a_platform_probe, 167af5adf12SKenneth Westfield }; 168af5adf12SKenneth Westfield module_platform_driver(max98357a_platform_driver); 169af5adf12SKenneth Westfield 170af5adf12SKenneth Westfield MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver"); 171af5adf12SKenneth Westfield MODULE_LICENSE("GPL v2"); 172