sound/soc/fsl/eukrea-tlv320.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
   4 //
   5 // Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
   6 //
   7 // based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
   8 // which is Copyright 2009 Simtec Electronics
   9 // and on sound/soc/imx/phycore-ac97.c which is
  10 // Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
  11
  12 #include <linux/errno.h>
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/of.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/device.h>
  18 #include <linux/i2c.h>
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/soc.h>
  22 #include <asm/mach-types.h>
  23
  24 #include "../codecs/tlv320aic23.h"
  25 #include "imx-ssi.h"
  26 #include "imx-audmux.h"
  27
  28 #define CODEC_CLOCK 12000000
  29
  30 static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
  31                             struct snd_pcm_hw_params *params)
  32 {
  33         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  34         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  35         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  36         int ret;
  37
  38         ret = snd_soc_dai_set_sysclk(codec_dai, 0,
  39                                      CODEC_CLOCK, SND_SOC_CLOCK_OUT);
  40         if (ret) {
  41                 dev_err(cpu_dai->dev,
  42                         "Failed to set the codec sysclk.\n");
  43                 return ret;
  44         }
  45
  46         snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 0);
  47
  48         ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
  49                                 SND_SOC_CLOCK_IN);
  50         /* fsl_ssi lacks the set_sysclk ops */
  51         if (ret && ret != -EINVAL) {
  52                 dev_err(cpu_dai->dev,
  53                         "Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
  54                 return ret;
  55         }
  56
  57         return 0;
  58 }
  59
  60 static const struct snd_soc_ops eukrea_tlv320_snd_ops = {
  61         .hw_params      = eukrea_tlv320_hw_params,
  62 };
  63
  64 static struct snd_soc_dai_link eukrea_tlv320_dai = {
  65         .name           = "tlv320aic23",
  66         .stream_name    = "TLV320AIC23",
  67         .codec_dai_name = "tlv320aic23-hifi",
  68         .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  69                           SND_SOC_DAIFMT_CBM_CFM,
  70         .ops            = &eukrea_tlv320_snd_ops,
  71 };
  72
  73 static struct snd_soc_card eukrea_tlv320 = {
  74         .owner          = THIS_MODULE,
  75         .dai_link       = &eukrea_tlv320_dai,
  76         .num_links      = 1,
  77 };
  78
  79 static int eukrea_tlv320_probe(struct platform_device *pdev)
  80 {
  81         int ret;
  82         int int_port = 0, ext_port;
  83         struct device_node *np = pdev->dev.of_node;
  84         struct device_node *ssi_np = NULL, *codec_np = NULL;
  85
  86         eukrea_tlv320.dev = &pdev->dev;
  87         if (np) {
  88                 ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
  89                                                  "eukrea,model");
  90                 if (ret) {
  91                         dev_err(&pdev->dev,
  92                                 "eukrea,model node missing or invalid.\n");
  93                         goto err;
  94                 }
  95
  96                 ssi_np = of_parse_phandle(pdev->dev.of_node,
  97                                           "ssi-controller", 0);
  98                 if (!ssi_np) {
  99                         dev_err(&pdev->dev,
 100                                 "ssi-controller missing or invalid.\n");
 101                         ret = -ENODEV;
 102                         goto err;
 103                 }
 104
 105                 codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
 106                 if (codec_np)
 107                         eukrea_tlv320_dai.codec_of_node = codec_np;
 108                 else
 109                         dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
 110
 111                 ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
 112                 if (ret) {
 113                         dev_err(&pdev->dev,
 114                                 "fsl,mux-int-port node missing or invalid.\n");
 115                         goto err;
 116                 }
 117                 ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
 118                 if (ret) {
 119                         dev_err(&pdev->dev,
 120                                 "fsl,mux-ext-port node missing or invalid.\n");
 121                         goto err;
 122                 }
 123
 124                 /*
 125                  * The port numbering in the hardware manual starts at 1, while
 126                  * the audmux API expects it starts at 0.
 127                  */
 128                 int_port--;
 129                 ext_port--;
 130
 131                 eukrea_tlv320_dai.cpu_of_node = ssi_np;
 132                 eukrea_tlv320_dai.platform_of_node = ssi_np;
 133         } else {
 134                 eukrea_tlv320_dai.cpu_dai_name = "imx-ssi.0";
 135                 eukrea_tlv320_dai.platform_name = "imx-ssi.0";
 136                 eukrea_tlv320_dai.codec_name = "tlv320aic23-codec.0-001a";
 137                 eukrea_tlv320.name = "cpuimx-audio";
 138         }
 139
 140         if (machine_is_eukrea_cpuimx27() ||
 141             of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
 142                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
 143                         IMX_AUDMUX_V1_PCR_SYN |
 144                         IMX_AUDMUX_V1_PCR_TFSDIR |
 145                         IMX_AUDMUX_V1_PCR_TCLKDIR |
 146                         IMX_AUDMUX_V1_PCR_RFSDIR |
 147                         IMX_AUDMUX_V1_PCR_RCLKDIR |
 148                         IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 149                         IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
 150                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
 151                 );
 152                 imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
 153                         IMX_AUDMUX_V1_PCR_SYN |
 154                         IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
 155                 );
 156         } else if (machine_is_eukrea_cpuimx25sd() ||
 157                    machine_is_eukrea_cpuimx35sd() ||
 158                    machine_is_eukrea_cpuimx51sd() ||
 159                    of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
 160                 if (!np)
 161                         ext_port = machine_is_eukrea_cpuimx25sd() ?
 162                                 4 : 3;
 163
 164                 imx_audmux_v2_configure_port(int_port,
 165                         IMX_AUDMUX_V2_PTCR_SYN |
 166                         IMX_AUDMUX_V2_PTCR_TFSDIR |
 167                         IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
 168                         IMX_AUDMUX_V2_PTCR_TCLKDIR |
 169                         IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
 170                         IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
 171                 );
 172                 imx_audmux_v2_configure_port(ext_port,
 173                         IMX_AUDMUX_V2_PTCR_SYN,
 174                         IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
 175                 );
 176         } else {
 177                 if (np) {
 178                         /* The eukrea,asoc-tlv320 driver was explicitly
 179                          * requested (through the device tree).
 180                          */
 181                         dev_err(&pdev->dev,
 182                                 "Missing or invalid audmux DT node.\n");
 183                         return -ENODEV;
 184                 } else {
 185                         /* Return happy.
 186                          * We might run on a totally different machine.
 187                          */
 188                         return 0;
 189                 }
 190         }
 191
 192         ret = snd_soc_register_card(&eukrea_tlv320);
 193 err:
 194         if (ret)
 195                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
 196         of_node_put(ssi_np);
 197
 198         return ret;
 199 }
 200
 201 static int eukrea_tlv320_remove(struct platform_device *pdev)
 202 {
 203         snd_soc_unregister_card(&eukrea_tlv320);
 204
 205         return 0;
 206 }
 207
 208 static const struct of_device_id imx_tlv320_dt_ids[] = {
 209         { .compatible = "eukrea,asoc-tlv320"},
 210         { /* sentinel */ }
 211 };
 212 MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
 213
 214 static struct platform_driver eukrea_tlv320_driver = {
 215         .driver = {
 216                 .name = "eukrea_tlv320",
 217                 .of_match_table = imx_tlv320_dt_ids,
 218         },
 219         .probe = eukrea_tlv320_probe,
 220         .remove = eukrea_tlv320_remove,
 221 };
 222
 223 module_platform_driver(eukrea_tlv320_driver);
 224
 225 MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
 226 MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
 227 MODULE_LICENSE("GPL");
 228 MODULE_ALIAS("platform:eukrea_tlv320");