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 "imx-audmux.h"
  33
  34 #define CODEC_CLOCK 12000000
  35
  36 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
  37                             struct snd_pcm_hw_params *params)
  38 {
  39         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  40         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  41         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  42         int ret;
  43
  44         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  45                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
  46         if (ret) {
  47                 dev_err(cpu_dai->dev,
  48                         "Failed to set the codec sysclk.\n");
  49                 return ret;
  50         }
  51
  52         snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 0);
  53
  54         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  55                                 SND_SOC_CLOCK_IN);
  56         /* fsl_ssi lacks the set_sysclk ops */
  57         if (ret && ret != -EINVAL) {
  58                 dev_err(cpu_dai->dev,
  59                         "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
  60                 return ret;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static const struct snd_soc_ops eukrea_tlv320_snd_ops = {
  67         .hw_params      = eukrea_tlv320_hw_params,
  68 };
  69
  70 static struct snd_soc_dai_link eukrea_tlv320_dai = {
  71         .name           = "tlv320aic23",
  72         .stream_name    = "TLV320AIC23",
  73         .codec_dai_name = "tlv320aic23-hifi",
  74         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  75                           SND_SOC_DAIFMT_CBM_CFM,
  76         .ops            = &eukrea_tlv320_snd_ops,
  77 };
  78
  79 static struct snd_soc_card eukrea_tlv320 = {
  80         .owner          = THIS_MODULE,
  81         .dai_link       = &eukrea_tlv320_dai,
  82         .num_links      = 1,
  83 };
  84
  85 static int eukrea_tlv320_probe(struct platform_device *pdev)
  86 {
  87         int ret;
  88         int int_port = 0, ext_port;
  89         struct device_node *np = pdev->dev.of_node;
  90         struct device_node *ssi_np = NULL, *codec_np = NULL;
  91
  92         eukrea_tlv320.dev = &pdev->dev;
  93         if (np) {
  94                 ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
  95                                                  "eukrea,model");
  96                 if (ret) {
  97                         dev_err(&pdev->dev,
  98                                 "eukrea,model node missing or invalid.\n");
  99                         goto err;
 100                 }
 101
 102                 ssi_np = of_parse_phandle(pdev->dev.of_node,
 103                                           "ssi-controller", 0);
 104                 if (!ssi_np) {
 105                         dev_err(&pdev->dev,
 106                                 "ssi-controller missing or invalid.\n");
 107                         ret = -ENODEV;
 108                         goto err;
 109                 }
 110
 111                 codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
 112                 if (codec_np)
 113                         eukrea_tlv320_dai.codec_of_node = codec_np;
 114                 else
 115                         dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
 116
 117                 ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
 118                 if (ret) {
 119                         dev_err(&pdev->dev,
 120                                 "fsl,mux-int-port node missing or invalid.\n");
 121                         return ret;
 122                 }
 123                 ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
 124                 if (ret) {
 125                         dev_err(&pdev->dev,
 126                                 "fsl,mux-ext-port node missing or invalid.\n");
 127                         return ret;
 128                 }
 129
 130                 /*
 131                  * The port numbering in the hardware manual starts at 1, while
 132                  * the audmux API expects it starts at 0.
 133                  */
 134                 int_port--;
 135                 ext_port--;
 136
 137                 eukrea_tlv320_dai.cpu_of_node = ssi_np;
 138                 eukrea_tlv320_dai.platform_of_node = ssi_np;
 139         } else {
 140                 eukrea_tlv320_dai.cpu_dai_name = "imx-ssi.0";
 141                 eukrea_tlv320_dai.platform_name = "imx-ssi.0";
 142                 eukrea_tlv320_dai.codec_name = "tlv320aic23-codec.0-001a";
 143                 eukrea_tlv320.name = "cpuimx-audio";
 144         }
 145
 146         if (machine_is_eukrea_cpuimx27() ||
 147             of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
 148                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
 149                         IMX_AUDMUX_V1_PCR_SYN |
 150                         IMX_AUDMUX_V1_PCR_TFSDIR |
 151                         IMX_AUDMUX_V1_PCR_TCLKDIR |
 152                         IMX_AUDMUX_V1_PCR_RFSDIR |
 153                         IMX_AUDMUX_V1_PCR_RCLKDIR |
 154                         IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 155                         IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 156                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
 157                 );
 158                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
 159                         IMX_AUDMUX_V1_PCR_SYN |
 160                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
 161                 );
 162         } else if (machine_is_eukrea_cpuimx25sd() ||
 163                    machine_is_eukrea_cpuimx35sd() ||
 164                    machine_is_eukrea_cpuimx51sd() ||
 165                    of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
 166                 if (!np)
 167                         ext_port = machine_is_eukrea_cpuimx25sd() ?
 168                                 4 : 3;
 169
 170                 imx_audmux_v2_configure_port(int_port,
 171                         IMX_AUDMUX_V2_PTCR_SYN |
 172                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 173                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 174                         IMX_AUDMUX_V2_PTCR_TCLKDIR |
 175                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
 176                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
 177                 );
 178                 imx_audmux_v2_configure_port(ext_port,
 179                         IMX_AUDMUX_V2_PTCR_SYN,
 180                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
 181                 );
 182         } else {
 183                 if (np) {
 184                         /* The eukrea,asoc-tlv320 driver was explicitly
 185                          * requested (through the device tree).
 186                          */
 187                         dev_err(&pdev->dev,
 188                                 "Missing or invalid audmux DT node.\n");
 189                         return -ENODEV;
 190                 } else {
 191                         /* Return happy.
 192                          * We might run on a totally different machine.
 193                          */
 194                         return 0;
 195                 }
 196         }
 197
 198         ret = snd_soc_register_card(&eukrea_tlv320);
 199 err:
 200         if (ret)
 201                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 202         of_node_put(ssi_np);
 203
 204         return ret;
 205 }
 206
 207 static int eukrea_tlv320_remove(struct platform_device *pdev)
 208 {
 209         snd_soc_unregister_card(&eukrea_tlv320);
 210
 211         return 0;
 212 }
 213
 214 static const struct of_device_id imx_tlv320_dt_ids[] = {
 215         { .compatible = "eukrea,asoc-tlv320"},
 216         { /* sentinel */ }
 217 };
 218 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
 219
 220 static struct platform_driver eukrea_tlv320_driver = {
 221         .driver = {
 222                 .name = "eukrea_tlv320",
 223                 .of_match_table = imx_tlv320_dt_ids,
 224         },
 225         .probe = eukrea_tlv320_probe,
 226         .remove = eukrea_tlv320_remove,
 227 };
 228
 229 module_platform_driver(eukrea_tlv320_driver);
 230
 231 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
 232 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
 233 MODULE_LICENSE("GPL");
 234 MODULE_ALIAS("platform:eukrea_tlv320");