10471cd93SMichael Trimarchi /* 20471cd93SMichael Trimarchi * PCM179X ASoC codec driver 30471cd93SMichael Trimarchi * 40471cd93SMichael Trimarchi * Copyright (c) Amarula Solutions B.V. 2013 50471cd93SMichael Trimarchi * 60471cd93SMichael Trimarchi * Michael Trimarchi <michael@amarulasolutions.com> 70471cd93SMichael Trimarchi * 80471cd93SMichael Trimarchi * This program is free software; you can redistribute it and/or 90471cd93SMichael Trimarchi * modify it under the terms of the GNU General Public License 100471cd93SMichael Trimarchi * as published by the Free Software Foundation; either version 2 110471cd93SMichael Trimarchi * of the License, or (at your option) any later version. 120471cd93SMichael Trimarchi * 130471cd93SMichael Trimarchi * This program is distributed in the hope that it will be useful, 140471cd93SMichael Trimarchi * but WITHOUT ANY WARRANTY; without even the implied warranty of 150471cd93SMichael Trimarchi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 160471cd93SMichael Trimarchi * GNU General Public License for more details. 170471cd93SMichael Trimarchi */ 180471cd93SMichael Trimarchi 190471cd93SMichael Trimarchi #include <linux/module.h> 200471cd93SMichael Trimarchi #include <linux/slab.h> 210471cd93SMichael Trimarchi #include <linux/kernel.h> 220471cd93SMichael Trimarchi #include <linux/device.h> 230471cd93SMichael Trimarchi #include <linux/spi/spi.h> 240471cd93SMichael Trimarchi 250471cd93SMichael Trimarchi #include <sound/core.h> 260471cd93SMichael Trimarchi #include <sound/pcm.h> 270471cd93SMichael Trimarchi #include <sound/pcm_params.h> 280471cd93SMichael Trimarchi #include <sound/initval.h> 290471cd93SMichael Trimarchi #include <sound/soc.h> 300471cd93SMichael Trimarchi #include <sound/tlv.h> 310471cd93SMichael Trimarchi #include <linux/of.h> 320471cd93SMichael Trimarchi #include <linux/of_device.h> 330471cd93SMichael Trimarchi 340471cd93SMichael Trimarchi #include "pcm179x.h" 350471cd93SMichael Trimarchi 360471cd93SMichael Trimarchi #define PCM179X_DAC_VOL_LEFT 0x10 370471cd93SMichael Trimarchi #define PCM179X_DAC_VOL_RIGHT 0x11 380471cd93SMichael Trimarchi #define PCM179X_FMT_CONTROL 0x12 390471cd93SMichael Trimarchi #define PCM179X_MODE_CONTROL 0x13 400471cd93SMichael Trimarchi #define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL 410471cd93SMichael Trimarchi 420471cd93SMichael Trimarchi #define PCM179X_FMT_MASK 0x70 430471cd93SMichael Trimarchi #define PCM179X_FMT_SHIFT 4 440471cd93SMichael Trimarchi #define PCM179X_MUTE_MASK 0x01 450471cd93SMichael Trimarchi #define PCM179X_MUTE_SHIFT 0 460471cd93SMichael Trimarchi #define PCM179X_ATLD_ENABLE (1 << 7) 470471cd93SMichael Trimarchi 480471cd93SMichael Trimarchi static const struct reg_default pcm179x_reg_defaults[] = { 490471cd93SMichael Trimarchi { 0x10, 0xff }, 500471cd93SMichael Trimarchi { 0x11, 0xff }, 510471cd93SMichael Trimarchi { 0x12, 0x50 }, 520471cd93SMichael Trimarchi { 0x13, 0x00 }, 530471cd93SMichael Trimarchi { 0x14, 0x00 }, 540471cd93SMichael Trimarchi { 0x15, 0x01 }, 550471cd93SMichael Trimarchi { 0x16, 0x00 }, 560471cd93SMichael Trimarchi { 0x17, 0x00 }, 570471cd93SMichael Trimarchi }; 580471cd93SMichael Trimarchi 590471cd93SMichael Trimarchi static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg) 600471cd93SMichael Trimarchi { 610471cd93SMichael Trimarchi return reg >= 0x10 && reg <= 0x17; 620471cd93SMichael Trimarchi } 630471cd93SMichael Trimarchi 640471cd93SMichael Trimarchi static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg) 650471cd93SMichael Trimarchi { 660471cd93SMichael Trimarchi bool accessible; 670471cd93SMichael Trimarchi 680471cd93SMichael Trimarchi accessible = pcm179x_accessible_reg(dev, reg); 690471cd93SMichael Trimarchi 700471cd93SMichael Trimarchi return accessible && reg != 0x16 && reg != 0x17; 710471cd93SMichael Trimarchi } 720471cd93SMichael Trimarchi 730471cd93SMichael Trimarchi struct pcm179x_private { 740471cd93SMichael Trimarchi struct regmap *regmap; 750471cd93SMichael Trimarchi unsigned int format; 760471cd93SMichael Trimarchi unsigned int rate; 770471cd93SMichael Trimarchi }; 780471cd93SMichael Trimarchi 790471cd93SMichael Trimarchi static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai, 800471cd93SMichael Trimarchi unsigned int format) 810471cd93SMichael Trimarchi { 820471cd93SMichael Trimarchi struct snd_soc_codec *codec = codec_dai->codec; 830471cd93SMichael Trimarchi struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 840471cd93SMichael Trimarchi 850471cd93SMichael Trimarchi priv->format = format; 860471cd93SMichael Trimarchi 870471cd93SMichael Trimarchi return 0; 880471cd93SMichael Trimarchi } 890471cd93SMichael Trimarchi 900471cd93SMichael Trimarchi static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute) 910471cd93SMichael Trimarchi { 920471cd93SMichael Trimarchi struct snd_soc_codec *codec = dai->codec; 930471cd93SMichael Trimarchi struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 940471cd93SMichael Trimarchi int ret; 950471cd93SMichael Trimarchi 960471cd93SMichael Trimarchi ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE, 970471cd93SMichael Trimarchi PCM179X_MUTE_MASK, !!mute); 980471cd93SMichael Trimarchi if (ret < 0) 990471cd93SMichael Trimarchi return ret; 1000471cd93SMichael Trimarchi 1010471cd93SMichael Trimarchi return 0; 1020471cd93SMichael Trimarchi } 1030471cd93SMichael Trimarchi 1040471cd93SMichael Trimarchi static int pcm179x_hw_params(struct snd_pcm_substream *substream, 1050471cd93SMichael Trimarchi struct snd_pcm_hw_params *params, 1060471cd93SMichael Trimarchi struct snd_soc_dai *dai) 1070471cd93SMichael Trimarchi { 1080471cd93SMichael Trimarchi struct snd_soc_codec *codec = dai->codec; 1090471cd93SMichael Trimarchi struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec); 1100471cd93SMichael Trimarchi int val = 0, ret; 1110471cd93SMichael Trimarchi 1120471cd93SMichael Trimarchi priv->rate = params_rate(params); 1130471cd93SMichael Trimarchi 1140471cd93SMichael Trimarchi switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { 1150471cd93SMichael Trimarchi case SND_SOC_DAIFMT_RIGHT_J: 1160471cd93SMichael Trimarchi switch (params_width(params)) { 1170471cd93SMichael Trimarchi case 24: 1180471cd93SMichael Trimarchi case 32: 1190471cd93SMichael Trimarchi val = 2; 1200471cd93SMichael Trimarchi break; 1210471cd93SMichael Trimarchi case 16: 1220471cd93SMichael Trimarchi val = 0; 1230471cd93SMichael Trimarchi break; 1240471cd93SMichael Trimarchi default: 1250471cd93SMichael Trimarchi return -EINVAL; 1260471cd93SMichael Trimarchi } 1270471cd93SMichael Trimarchi break; 1280471cd93SMichael Trimarchi case SND_SOC_DAIFMT_I2S: 1290471cd93SMichael Trimarchi switch (params_width(params)) { 1300471cd93SMichael Trimarchi case 24: 1310471cd93SMichael Trimarchi case 32: 1320471cd93SMichael Trimarchi val = 5; 1330471cd93SMichael Trimarchi break; 1340471cd93SMichael Trimarchi case 16: 1350471cd93SMichael Trimarchi val = 4; 1360471cd93SMichael Trimarchi break; 1370471cd93SMichael Trimarchi default: 1380471cd93SMichael Trimarchi return -EINVAL; 1390471cd93SMichael Trimarchi } 1400471cd93SMichael Trimarchi break; 1410471cd93SMichael Trimarchi default: 1420471cd93SMichael Trimarchi dev_err(codec->dev, "Invalid DAI format\n"); 1430471cd93SMichael Trimarchi return -EINVAL; 1440471cd93SMichael Trimarchi } 1450471cd93SMichael Trimarchi 1460471cd93SMichael Trimarchi val = val << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE; 1470471cd93SMichael Trimarchi 1480471cd93SMichael Trimarchi ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL, 1490471cd93SMichael Trimarchi PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val); 1500471cd93SMichael Trimarchi if (ret < 0) 1510471cd93SMichael Trimarchi return ret; 1520471cd93SMichael Trimarchi 1530471cd93SMichael Trimarchi return 0; 1540471cd93SMichael Trimarchi } 1550471cd93SMichael Trimarchi 1560471cd93SMichael Trimarchi static const struct snd_soc_dai_ops pcm179x_dai_ops = { 1570471cd93SMichael Trimarchi .set_fmt = pcm179x_set_dai_fmt, 1580471cd93SMichael Trimarchi .hw_params = pcm179x_hw_params, 1590471cd93SMichael Trimarchi .digital_mute = pcm179x_digital_mute, 1600471cd93SMichael Trimarchi }; 1610471cd93SMichael Trimarchi 1620471cd93SMichael Trimarchi static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1); 1630471cd93SMichael Trimarchi 1640471cd93SMichael Trimarchi static const struct snd_kcontrol_new pcm179x_controls[] = { 1650471cd93SMichael Trimarchi SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT, 1660471cd93SMichael Trimarchi PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0, 1670471cd93SMichael Trimarchi pcm179x_dac_tlv), 1680471cd93SMichael Trimarchi SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0), 1690471cd93SMichael Trimarchi SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0), 1700471cd93SMichael Trimarchi }; 1710471cd93SMichael Trimarchi 1720471cd93SMichael Trimarchi static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = { 1730471cd93SMichael Trimarchi SND_SOC_DAPM_OUTPUT("IOUTL+"), 1740471cd93SMichael Trimarchi SND_SOC_DAPM_OUTPUT("IOUTL-"), 1750471cd93SMichael Trimarchi SND_SOC_DAPM_OUTPUT("IOUTR+"), 1760471cd93SMichael Trimarchi SND_SOC_DAPM_OUTPUT("IOUTR-"), 1770471cd93SMichael Trimarchi }; 1780471cd93SMichael Trimarchi 1790471cd93SMichael Trimarchi static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = { 1800471cd93SMichael Trimarchi { "IOUTL+", NULL, "Playback" }, 1810471cd93SMichael Trimarchi { "IOUTL-", NULL, "Playback" }, 1820471cd93SMichael Trimarchi { "IOUTR+", NULL, "Playback" }, 1830471cd93SMichael Trimarchi { "IOUTR-", NULL, "Playback" }, 1840471cd93SMichael Trimarchi }; 1850471cd93SMichael Trimarchi 1860471cd93SMichael Trimarchi static struct snd_soc_dai_driver pcm179x_dai = { 1870471cd93SMichael Trimarchi .name = "pcm179x-hifi", 1880471cd93SMichael Trimarchi .playback = { 1890471cd93SMichael Trimarchi .stream_name = "Playback", 1900471cd93SMichael Trimarchi .channels_min = 2, 1910471cd93SMichael Trimarchi .channels_max = 2, 1920471cd93SMichael Trimarchi .rates = PCM1792A_RATES, 1930471cd93SMichael Trimarchi .formats = PCM1792A_FORMATS, }, 1940471cd93SMichael Trimarchi .ops = &pcm179x_dai_ops, 1950471cd93SMichael Trimarchi }; 1960471cd93SMichael Trimarchi 1970471cd93SMichael Trimarchi static const struct of_device_id pcm179x_of_match[] = { 1980471cd93SMichael Trimarchi { .compatible = "ti,pcm1792a", }, 1990471cd93SMichael Trimarchi { } 2000471cd93SMichael Trimarchi }; 2010471cd93SMichael Trimarchi MODULE_DEVICE_TABLE(of, pcm179x_of_match); 2020471cd93SMichael Trimarchi 2030471cd93SMichael Trimarchi static const struct regmap_config pcm179x_regmap = { 2040471cd93SMichael Trimarchi .reg_bits = 8, 2050471cd93SMichael Trimarchi .val_bits = 8, 2060471cd93SMichael Trimarchi .max_register = 23, 2070471cd93SMichael Trimarchi .reg_defaults = pcm179x_reg_defaults, 2080471cd93SMichael Trimarchi .num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults), 2090471cd93SMichael Trimarchi .writeable_reg = pcm179x_writeable_reg, 2100471cd93SMichael Trimarchi .readable_reg = pcm179x_accessible_reg, 2110471cd93SMichael Trimarchi }; 2120471cd93SMichael Trimarchi 2130471cd93SMichael Trimarchi static struct snd_soc_codec_driver soc_codec_dev_pcm179x = { 2140471cd93SMichael Trimarchi .controls = pcm179x_controls, 2150471cd93SMichael Trimarchi .num_controls = ARRAY_SIZE(pcm179x_controls), 2160471cd93SMichael Trimarchi .dapm_widgets = pcm179x_dapm_widgets, 2170471cd93SMichael Trimarchi .num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets), 2180471cd93SMichael Trimarchi .dapm_routes = pcm179x_dapm_routes, 2190471cd93SMichael Trimarchi .num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes), 2200471cd93SMichael Trimarchi }; 2210471cd93SMichael Trimarchi 2220471cd93SMichael Trimarchi static int pcm179x_spi_probe(struct spi_device *spi) 2230471cd93SMichael Trimarchi { 2240471cd93SMichael Trimarchi struct pcm179x_private *pcm179x; 2250471cd93SMichael Trimarchi int ret; 2260471cd93SMichael Trimarchi 2270471cd93SMichael Trimarchi pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private), 2280471cd93SMichael Trimarchi GFP_KERNEL); 2290471cd93SMichael Trimarchi if (!pcm179x) 2300471cd93SMichael Trimarchi return -ENOMEM; 2310471cd93SMichael Trimarchi 2320471cd93SMichael Trimarchi spi_set_drvdata(spi, pcm179x); 2330471cd93SMichael Trimarchi 2340471cd93SMichael Trimarchi pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap); 2350471cd93SMichael Trimarchi if (IS_ERR(pcm179x->regmap)) { 2360471cd93SMichael Trimarchi ret = PTR_ERR(pcm179x->regmap); 2370471cd93SMichael Trimarchi dev_err(&spi->dev, "Failed to register regmap: %d\n", ret); 2380471cd93SMichael Trimarchi return ret; 2390471cd93SMichael Trimarchi } 2400471cd93SMichael Trimarchi 2410471cd93SMichael Trimarchi return snd_soc_register_codec(&spi->dev, 2420471cd93SMichael Trimarchi &soc_codec_dev_pcm179x, &pcm179x_dai, 1); 2430471cd93SMichael Trimarchi } 2440471cd93SMichael Trimarchi 2450471cd93SMichael Trimarchi static int pcm179x_spi_remove(struct spi_device *spi) 2460471cd93SMichael Trimarchi { 2470471cd93SMichael Trimarchi snd_soc_unregister_codec(&spi->dev); 2480471cd93SMichael Trimarchi return 0; 2490471cd93SMichael Trimarchi } 2500471cd93SMichael Trimarchi 2510471cd93SMichael Trimarchi static const struct spi_device_id pcm179x_spi_ids[] = { 2520471cd93SMichael Trimarchi { "pcm179x", 0 }, 2530471cd93SMichael Trimarchi { }, 2540471cd93SMichael Trimarchi }; 2550471cd93SMichael Trimarchi MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids); 2560471cd93SMichael Trimarchi 2570471cd93SMichael Trimarchi static struct spi_driver pcm179x_codec_driver = { 2580471cd93SMichael Trimarchi .driver = { 2590471cd93SMichael Trimarchi .name = "pcm179x", 2600471cd93SMichael Trimarchi .of_match_table = of_match_ptr(pcm179x_of_match), 2610471cd93SMichael Trimarchi }, 2620471cd93SMichael Trimarchi .id_table = pcm179x_spi_ids, 2630471cd93SMichael Trimarchi .probe = pcm179x_spi_probe, 2640471cd93SMichael Trimarchi .remove = pcm179x_spi_remove, 2650471cd93SMichael Trimarchi }; 2660471cd93SMichael Trimarchi 2670471cd93SMichael Trimarchi module_spi_driver(pcm179x_codec_driver); 2680471cd93SMichael Trimarchi 2690471cd93SMichael Trimarchi MODULE_DESCRIPTION("ASoC PCM179X driver"); 2700471cd93SMichael Trimarchi MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>"); 2710471cd93SMichael Trimarchi MODULE_LICENSE("GPL"); 272