1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * osk5912.c -- SoC audio for OSK 5912 4 * 5 * Copyright (C) 2008 Mistral Solutions 6 * 7 * Contact: Arun KS <arunks@mistralsolutions.com> 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/platform_device.h> 12 #include <sound/core.h> 13 #include <sound/pcm.h> 14 #include <sound/soc.h> 15 16 #include <asm/mach-types.h> 17 #include <linux/module.h> 18 #include <linux/platform_data/asoc-ti-mcbsp.h> 19 20 #include "omap-mcbsp.h" 21 #include "../codecs/tlv320aic23.h" 22 23 #define CODEC_CLOCK 12000000 24 25 static struct clk *tlv320aic23_mclk; 26 27 static int osk_startup(struct snd_pcm_substream *substream) 28 { 29 return clk_prepare_enable(tlv320aic23_mclk); 30 } 31 32 static void osk_shutdown(struct snd_pcm_substream *substream) 33 { 34 clk_disable_unprepare(tlv320aic23_mclk); 35 } 36 37 static int osk_hw_params(struct snd_pcm_substream *substream, 38 struct snd_pcm_hw_params *params) 39 { 40 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 41 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); 42 int err; 43 44 /* Set the codec system clock for DAC and ADC */ 45 err = 46 snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN); 47 48 if (err < 0) { 49 printk(KERN_ERR "can't set codec system clock\n"); 50 return err; 51 } 52 53 return err; 54 } 55 56 static const struct snd_soc_ops osk_ops = { 57 .startup = osk_startup, 58 .hw_params = osk_hw_params, 59 .shutdown = osk_shutdown, 60 }; 61 62 static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = { 63 SND_SOC_DAPM_HP("Headphone Jack", NULL), 64 SND_SOC_DAPM_LINE("Line In", NULL), 65 SND_SOC_DAPM_MIC("Mic Jack", NULL), 66 }; 67 68 static const struct snd_soc_dapm_route audio_map[] = { 69 {"Headphone Jack", NULL, "LHPOUT"}, 70 {"Headphone Jack", NULL, "RHPOUT"}, 71 72 {"LLINEIN", NULL, "Line In"}, 73 {"RLINEIN", NULL, "Line In"}, 74 75 {"MICIN", NULL, "Mic Jack"}, 76 }; 77 78 /* Digital audio interface glue - connects codec <--> CPU */ 79 SND_SOC_DAILINK_DEFS(aic23, 80 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.1")), 81 DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec", 82 "tlv320aic23-hifi")), 83 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.1"))); 84 85 static struct snd_soc_dai_link osk_dai = { 86 .name = "TLV320AIC23", 87 .stream_name = "AIC23", 88 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF | 89 SND_SOC_DAIFMT_CBM_CFM, 90 .ops = &osk_ops, 91 SND_SOC_DAILINK_REG(aic23), 92 }; 93 94 /* Audio machine driver */ 95 static struct snd_soc_card snd_soc_card_osk = { 96 .name = "OSK5912", 97 .owner = THIS_MODULE, 98 .dai_link = &osk_dai, 99 .num_links = 1, 100 101 .dapm_widgets = tlv320aic23_dapm_widgets, 102 .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets), 103 .dapm_routes = audio_map, 104 .num_dapm_routes = ARRAY_SIZE(audio_map), 105 }; 106 107 static struct platform_device *osk_snd_device; 108 109 static int __init osk_soc_init(void) 110 { 111 int err; 112 u32 curRate; 113 struct device *dev; 114 115 if (!(machine_is_omap_osk())) 116 return -ENODEV; 117 118 osk_snd_device = platform_device_alloc("soc-audio", -1); 119 if (!osk_snd_device) 120 return -ENOMEM; 121 122 platform_set_drvdata(osk_snd_device, &snd_soc_card_osk); 123 err = platform_device_add(osk_snd_device); 124 if (err) 125 goto err1; 126 127 dev = &osk_snd_device->dev; 128 129 tlv320aic23_mclk = clk_get(dev, "mclk"); 130 if (IS_ERR(tlv320aic23_mclk)) { 131 printk(KERN_ERR "Could not get mclk clock\n"); 132 err = PTR_ERR(tlv320aic23_mclk); 133 goto err2; 134 } 135 136 /* 137 * Configure 12 MHz output on MCLK. 138 */ 139 curRate = (uint) clk_get_rate(tlv320aic23_mclk); 140 if (curRate != CODEC_CLOCK) { 141 if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) { 142 printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n"); 143 err = -ECANCELED; 144 goto err3; 145 } 146 } 147 148 printk(KERN_INFO "MCLK = %d [%d]\n", 149 (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK); 150 151 return 0; 152 153 err3: 154 clk_put(tlv320aic23_mclk); 155 err2: 156 platform_device_del(osk_snd_device); 157 err1: 158 platform_device_put(osk_snd_device); 159 160 return err; 161 162 } 163 164 static void __exit osk_soc_exit(void) 165 { 166 clk_put(tlv320aic23_mclk); 167 platform_device_unregister(osk_snd_device); 168 } 169 170 module_init(osk_soc_init); 171 module_exit(osk_soc_exit); 172 173 MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>"); 174 MODULE_DESCRIPTION("ALSA SoC OSK 5912"); 175 MODULE_LICENSE("GPL"); 176