1 /* 2 * Copyright 2011 Freescale Semiconductor, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License along 15 * with this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/device.h> 21 #include <linux/of.h> 22 #include <linux/of_device.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/soc.h> 26 #include <sound/jack.h> 27 #include <sound/soc-dapm.h> 28 29 #include "../codecs/sgtl5000.h" 30 #include "mxs-saif.h" 31 32 static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream, 33 struct snd_pcm_hw_params *params) 34 { 35 struct snd_soc_pcm_runtime *rtd = substream->private_data; 36 struct snd_soc_dai *codec_dai = rtd->codec_dai; 37 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 38 unsigned int rate = params_rate(params); 39 u32 mclk; 40 int ret; 41 42 /* sgtl5000 does not support 512*rate when in 96000 fs */ 43 switch (rate) { 44 case 96000: 45 mclk = 256 * rate; 46 break; 47 default: 48 mclk = 512 * rate; 49 break; 50 } 51 52 /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */ 53 ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0); 54 if (ret) { 55 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", 56 mclk / 1000000, mclk / 1000 % 1000); 57 return ret; 58 } 59 60 /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */ 61 ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0); 62 if (ret) { 63 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", 64 mclk / 1000000, mclk / 1000 % 1000); 65 return ret; 66 } 67 68 return 0; 69 } 70 71 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = { 72 .hw_params = mxs_sgtl5000_hw_params, 73 }; 74 75 #define MXS_SGTL5000_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \ 76 SND_SOC_DAIFMT_CBS_CFS) 77 78 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = { 79 { 80 .name = "HiFi Tx", 81 .stream_name = "HiFi Playback", 82 .codec_dai_name = "sgtl5000", 83 .dai_fmt = MXS_SGTL5000_DAI_FMT, 84 .ops = &mxs_sgtl5000_hifi_ops, 85 .playback_only = true, 86 }, { 87 .name = "HiFi Rx", 88 .stream_name = "HiFi Capture", 89 .codec_dai_name = "sgtl5000", 90 .dai_fmt = MXS_SGTL5000_DAI_FMT, 91 .ops = &mxs_sgtl5000_hifi_ops, 92 .capture_only = true, 93 }, 94 }; 95 96 static struct snd_soc_card mxs_sgtl5000 = { 97 .name = "mxs_sgtl5000", 98 .owner = THIS_MODULE, 99 .dai_link = mxs_sgtl5000_dai, 100 .num_links = ARRAY_SIZE(mxs_sgtl5000_dai), 101 }; 102 103 static int mxs_sgtl5000_probe(struct platform_device *pdev) 104 { 105 struct snd_soc_card *card = &mxs_sgtl5000; 106 int ret, i; 107 struct device_node *np = pdev->dev.of_node; 108 struct device_node *saif_np[2], *codec_np; 109 110 saif_np[0] = of_parse_phandle(np, "saif-controllers", 0); 111 saif_np[1] = of_parse_phandle(np, "saif-controllers", 1); 112 codec_np = of_parse_phandle(np, "audio-codec", 0); 113 if (!saif_np[0] || !saif_np[1] || !codec_np) { 114 dev_err(&pdev->dev, "phandle missing or invalid\n"); 115 return -EINVAL; 116 } 117 118 for (i = 0; i < 2; i++) { 119 mxs_sgtl5000_dai[i].codec_name = NULL; 120 mxs_sgtl5000_dai[i].codec_of_node = codec_np; 121 mxs_sgtl5000_dai[i].cpu_dai_name = NULL; 122 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i]; 123 mxs_sgtl5000_dai[i].platform_name = NULL; 124 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i]; 125 } 126 127 of_node_put(codec_np); 128 of_node_put(saif_np[0]); 129 of_node_put(saif_np[1]); 130 131 /* 132 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w). 133 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range 134 * should be >= 8MHz and <= 27M. 135 */ 136 ret = mxs_saif_get_mclk(0, 44100 * 256, 44100); 137 if (ret) { 138 dev_err(&pdev->dev, "failed to get mclk\n"); 139 return ret; 140 } 141 142 card->dev = &pdev->dev; 143 platform_set_drvdata(pdev, card); 144 145 ret = snd_soc_register_card(card); 146 if (ret) { 147 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 148 ret); 149 return ret; 150 } 151 152 return 0; 153 } 154 155 static int mxs_sgtl5000_remove(struct platform_device *pdev) 156 { 157 struct snd_soc_card *card = platform_get_drvdata(pdev); 158 159 mxs_saif_put_mclk(0); 160 161 snd_soc_unregister_card(card); 162 163 return 0; 164 } 165 166 static const struct of_device_id mxs_sgtl5000_dt_ids[] = { 167 { .compatible = "fsl,mxs-audio-sgtl5000", }, 168 { /* sentinel */ } 169 }; 170 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids); 171 172 static struct platform_driver mxs_sgtl5000_audio_driver = { 173 .driver = { 174 .name = "mxs-sgtl5000", 175 .of_match_table = mxs_sgtl5000_dt_ids, 176 }, 177 .probe = mxs_sgtl5000_probe, 178 .remove = mxs_sgtl5000_remove, 179 }; 180 181 module_platform_driver(mxs_sgtl5000_audio_driver); 182 183 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 184 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver"); 185 MODULE_LICENSE("GPL"); 186 MODULE_ALIAS("platform:mxs-sgtl5000"); 187