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