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Linux/sound/soc/fsl/eukrea-tlv320.c

  1 /*
  2  * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
  3  *
  4  * Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
  5  *
  6  * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
  7  * which is Copyright 2009 Simtec Electronics
  8  * and on sound/soc/imx/phycore-ac97.c which is
  9  * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 10  *
 11  *  This program is free software; you can redistribute  it and/or modify it
 12  *  under  the terms of  the GNU General  Public License as published by the
 13  *  Free Software Foundation;  either version 2 of the  License, or (at your
 14  *  option) any later version.
 15  *
 16  */
 17 
 18 #include <linux/module.h>
 19 #include <linux/moduleparam.h>
 20 #include <linux/device.h>
 21 #include <linux/i2c.h>
 22 #include <sound/core.h>
 23 #include <sound/pcm.h>
 24 #include <sound/soc.h>
 25 #include <asm/mach-types.h>
 26 
 27 #include "../codecs/tlv320aic23.h"
 28 #include "imx-ssi.h"
 29 #include "imx-audmux.h"
 30 
 31 #define CODEC_CLOCK 12000000
 32 
 33 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
 34                             struct snd_pcm_hw_params *params)
 35 {
 36         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 37         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 38         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 39         int ret;
 40 
 41         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 42                                   SND_SOC_DAIFMT_NB_NF |
 43                                   SND_SOC_DAIFMT_CBM_CFM);
 44         if (ret) {
 45                 dev_err(cpu_dai->dev,
 46                         "Failed to set the cpu dai format.\n");
 47                 return ret;
 48         }
 49 
 50         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 51                                   SND_SOC_DAIFMT_NB_NF |
 52                                   SND_SOC_DAIFMT_CBM_CFM);
 53         if (ret) {
 54                 dev_err(cpu_dai->dev,
 55                         "Failed to set the codec format.\n");
 56                 return ret;
 57         }
 58 
 59         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
 60                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
 61         if (ret) {
 62                 dev_err(cpu_dai->dev,
 63                         "Failed to set the codec sysclk.\n");
 64                 return ret;
 65         }
 66         snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
 67 
 68         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
 69                                 SND_SOC_CLOCK_IN);
 70         if (ret) {
 71                 dev_err(cpu_dai->dev,
 72                         "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
 73                 return ret;
 74         }
 75 
 76         return 0;
 77 }
 78 
 79 static struct snd_soc_ops eukrea_tlv320_snd_ops = {
 80         .hw_params      = eukrea_tlv320_hw_params,
 81 };
 82 
 83 static struct snd_soc_dai_link eukrea_tlv320_dai = {
 84         .name           = "tlv320aic23",
 85         .stream_name    = "TLV320AIC23",
 86         .codec_dai_name = "tlv320aic23-hifi",
 87         .platform_name  = "imx-ssi.0",
 88         .codec_name     = "tlv320aic23-codec.0-001a",
 89         .cpu_dai_name   = "imx-ssi.0",
 90         .ops            = &eukrea_tlv320_snd_ops,
 91 };
 92 
 93 static struct snd_soc_card eukrea_tlv320 = {
 94         .name           = "cpuimx-audio",
 95         .owner          = THIS_MODULE,
 96         .dai_link       = &eukrea_tlv320_dai,
 97         .num_links      = 1,
 98 };
 99 
100 static int eukrea_tlv320_probe(struct platform_device *pdev)
101 {
102         int ret;
103         int int_port = 0, ext_port;
104 
105         if (machine_is_eukrea_cpuimx27()) {
106                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
107                         IMX_AUDMUX_V1_PCR_SYN |
108                         IMX_AUDMUX_V1_PCR_TFSDIR |
109                         IMX_AUDMUX_V1_PCR_TCLKDIR |
110                         IMX_AUDMUX_V1_PCR_RFSDIR |
111                         IMX_AUDMUX_V1_PCR_RCLKDIR |
112                         IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
113                         IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
114                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
115                 );
116                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
117                         IMX_AUDMUX_V1_PCR_SYN |
118                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
119                 );
120         } else if (machine_is_eukrea_cpuimx25sd() ||
121                    machine_is_eukrea_cpuimx35sd() ||
122                    machine_is_eukrea_cpuimx51sd()) {
123                 ext_port = machine_is_eukrea_cpuimx25sd() ? 4 : 3;
124                 imx_audmux_v2_configure_port(int_port,
125                         IMX_AUDMUX_V2_PTCR_SYN |
126                         IMX_AUDMUX_V2_PTCR_TFSDIR |
127                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
128                         IMX_AUDMUX_V2_PTCR_TCLKDIR |
129                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
130                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
131                 );
132                 imx_audmux_v2_configure_port(ext_port,
133                         IMX_AUDMUX_V2_PTCR_SYN,
134                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
135                 );
136         } else {
137                 /* return happy. We might run on a totally different machine */
138                 return 0;
139         }
140 
141         eukrea_tlv320.dev = &pdev->dev;
142         ret = snd_soc_register_card(&eukrea_tlv320);
143         if (ret)
144                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
145 
146         return ret;
147 }
148 
149 static int eukrea_tlv320_remove(struct platform_device *pdev)
150 {
151         snd_soc_unregister_card(&eukrea_tlv320);
152 
153         return 0;
154 }
155 
156 static struct platform_driver eukrea_tlv320_driver = {
157         .driver = {
158                 .name = "eukrea_tlv320",
159                 .owner = THIS_MODULE,
160         },
161         .probe = eukrea_tlv320_probe,
162         .remove = eukrea_tlv320_remove,
163 };
164 
165 module_platform_driver(eukrea_tlv320_driver);
166 
167 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
168 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
169 MODULE_LICENSE("GPL");
170 MODULE_ALIAS("platform:eukrea_tlv320");
171 

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