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/errno.h>
  19 #include <linux/module.h>
  20 #include <linux/moduleparam.h>
  21 #include <linux/of.h>
  22 #include <linux/of_platform.h>
  23 #include <linux/device.h>
  24 #include <linux/i2c.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/soc.h>
  28 #include <asm/mach-types.h>
  29
  30 #include "../codecs/tlv320aic23.h"
  31 #include "imx-ssi.h"
  32 #include "fsl_ssi.h"
  33 #include "imx-audmux.h"
  34
  35 #define CODEC_CLOCK 12000000
  36
  37 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
  38                             struct snd_pcm_hw_params *params)
  39 {
  40         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  41         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  42         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  43         int ret;
  44
  45         ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
  46                                   SND_SOC_DAIFMT_NB_NF |
  47                                   SND_SOC_DAIFMT_CBM_CFM);
  48         /* fsl_ssi lacks the set_fmt ops. */
  49         if (ret && ret != -ENOTSUPP) {
  50                 dev_err(cpu_dai->dev,
  51                         "Failed to set the cpu dai format.\n");
  52                 return ret;
  53         }
  54
  55         ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
  56                                   SND_SOC_DAIFMT_NB_NF |
  57                                   SND_SOC_DAIFMT_CBM_CFM);
  58         if (ret) {
  59                 dev_err(cpu_dai->dev,
  60                         "Failed to set the codec format.\n");
  61                 return ret;
  62         }
  63
  64         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  65                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
  66         if (ret) {
  67                 dev_err(cpu_dai->dev,
  68                         "Failed to set the codec sysclk.\n");
  69                 return ret;
  70         }
  71
  72         snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
  73
  74         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  75                                 SND_SOC_CLOCK_IN);
  76         /* fsl_ssi lacks the set_sysclk ops */
  77         if (ret && ret != -EINVAL) {
  78                 dev_err(cpu_dai->dev,
  79                         "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
  80                 return ret;
  81         }
  82
  83         return 0;
  84 }
  85
  86 static struct snd_soc_ops eukrea_tlv320_snd_ops = {
  87         .hw_params      = eukrea_tlv320_hw_params,
  88 };
  89
  90 static struct snd_soc_dai_link eukrea_tlv320_dai = {
  91         .name           = "tlv320aic23",
  92         .stream_name    = "TLV320AIC23",
  93         .codec_dai_name = "tlv320aic23-hifi",
  94         .ops            = &eukrea_tlv320_snd_ops,
  95 };
  96
  97 static struct snd_soc_card eukrea_tlv320 = {
  98         .owner          = THIS_MODULE,
  99         .dai_link       = &eukrea_tlv320_dai,
 100         .num_links      = 1,
 101 };
 102
 103 static int eukrea_tlv320_probe(struct platform_device *pdev)
 104 {
 105         int ret;
 106         int int_port = 0, ext_port;
 107         struct device_node *np = pdev->dev.of_node;
 108         struct device_node *ssi_np, *codec_np;
 109
 110         eukrea_tlv320.dev = &pdev->dev;
 111         if (np) {
 112                 ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
 113                                                  "eukrea,model");
 114                 if (ret) {
 115                         dev_err(&pdev->dev,
 116                                 "eukrea,model node missing or invalid.\n");
 117                         goto err;
 118                 }
 119
 120                 ssi_np = of_parse_phandle(pdev->dev.of_node,
 121                                           "ssi-controller", 0);
 122                 if (!ssi_np) {
 123                         dev_err(&pdev->dev,
 124                                 "ssi-controller missing or invalid.\n");
 125                         ret = -ENODEV;
 126                         goto err;
 127                 }
 128
 129                 codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
 130                 if (codec_np)
 131                         eukrea_tlv320_dai.codec_of_node = codec_np;
 132                 else
 133                         dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
 134
 135                 ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
 136                 if (ret) {
 137                         dev_err(&pdev->dev,
 138                                 "fsl,mux-int-port node missing or invalid.\n");
 139                         return ret;
 140                 }
 141                 ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
 142                 if (ret) {
 143                         dev_err(&pdev->dev,
 144                                 "fsl,mux-ext-port node missing or invalid.\n");
 145                         return ret;
 146                 }
 147
 148                 /*
 149                  * The port numbering in the hardware manual starts at 1, while
 150                  * the audmux API expects it starts at 0.
 151                  */
 152                 int_port--;
 153                 ext_port--;
 154
 155                 eukrea_tlv320_dai.cpu_of_node = ssi_np;
 156                 eukrea_tlv320_dai.platform_of_node = ssi_np;
 157         } else {
 158                 eukrea_tlv320_dai.cpu_dai_name = "imx-ssi.0";
 159                 eukrea_tlv320_dai.platform_name = "imx-ssi.0";
 160                 eukrea_tlv320_dai.codec_name = "tlv320aic23-codec.0-001a";
 161                 eukrea_tlv320.name = "cpuimx-audio";
 162         }
 163
 164         if (machine_is_eukrea_cpuimx27() ||
 165             of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
 166                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
 167                         IMX_AUDMUX_V1_PCR_SYN |
 168                         IMX_AUDMUX_V1_PCR_TFSDIR |
 169                         IMX_AUDMUX_V1_PCR_TCLKDIR |
 170                         IMX_AUDMUX_V1_PCR_RFSDIR |
 171                         IMX_AUDMUX_V1_PCR_RCLKDIR |
 172                         IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 173                         IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 174                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
 175                 );
 176                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
 177                         IMX_AUDMUX_V1_PCR_SYN |
 178                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
 179                 );
 180         } else if (machine_is_eukrea_cpuimx25sd() ||
 181                    machine_is_eukrea_cpuimx35sd() ||
 182                    machine_is_eukrea_cpuimx51sd() ||
 183                    of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
 184                 if (!np)
 185                         ext_port = machine_is_eukrea_cpuimx25sd() ?
 186                                 4 : 3;
 187
 188                 imx_audmux_v2_configure_port(int_port,
 189                         IMX_AUDMUX_V2_PTCR_SYN |
 190                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 191                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 192                         IMX_AUDMUX_V2_PTCR_TCLKDIR |
 193                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
 194                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
 195                 );
 196                 imx_audmux_v2_configure_port(ext_port,
 197                         IMX_AUDMUX_V2_PTCR_SYN,
 198                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
 199                 );
 200         } else {
 201                 if (np) {
 202                         /* The eukrea,asoc-tlv320 driver was explicitely
 203                          * requested (through the device tree).
 204                          */
 205                         dev_err(&pdev->dev,
 206                                 "Missing or invalid audmux DT node.\n");
 207                         return -ENODEV;
 208                 } else {
 209                         /* Return happy.
 210                          * We might run on a totally different machine.
 211                          */
 212                         return 0;
 213                 }
 214         }
 215
 216         ret = snd_soc_register_card(&eukrea_tlv320);
 217 err:
 218         if (ret)
 219                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 220         if (np)
 221                 of_node_put(ssi_np);
 222
 223         return ret;
 224 }
 225
 226 static int eukrea_tlv320_remove(struct platform_device *pdev)
 227 {
 228         snd_soc_unregister_card(&eukrea_tlv320);
 229
 230         return 0;
 231 }
 232
 233 static const struct of_device_id imx_tlv320_dt_ids[] = {
 234         { .compatible = "eukrea,asoc-tlv320"},
 235         { /* sentinel */ }
 236 };
 237 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
 238
 239 static struct platform_driver eukrea_tlv320_driver = {
 240         .driver = {
 241                 .name = "eukrea_tlv320",
 242                 .owner = THIS_MODULE,
 243                 .of_match_table = imx_tlv320_dt_ids,
 244         },
 245         .probe = eukrea_tlv320_probe,
 246         .remove = eukrea_tlv320_remove,
 247 };
 248
 249 module_platform_driver(eukrea_tlv320_driver);
 250
 251 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
 252 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
 253 MODULE_LICENSE("GPL");
 254 MODULE_ALIAS("platform:eukrea_tlv320");