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 #include <asm/mach-types.h> 29 30 #include "../codecs/sgtl5000.h" 31 #include "mxs-saif.h" 32 33 static int mxs_sgtl5000_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 unsigned int rate = params_rate(params); 40 u32 dai_format, mclk; 41 int ret; 42 43 /* sgtl5000 does not support 512*rate when in 96000 fs */ 44 switch (rate) { 45 case 96000: 46 mclk = 256 * rate; 47 break; 48 default: 49 mclk = 512 * rate; 50 break; 51 } 52 53 /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */ 54 if (mclk < 8000000 || mclk > 27000000) 55 return -EINVAL; 56 57 /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */ 58 ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0); 59 if (ret) 60 return ret; 61 62 /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */ 63 ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0); 64 if (ret) 65 return ret; 66 67 /* set codec to slave mode */ 68 dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 69 SND_SOC_DAIFMT_CBS_CFS; 70 71 /* set codec DAI configuration */ 72 ret = snd_soc_dai_set_fmt(codec_dai, dai_format); 73 if (ret) 74 return ret; 75 76 /* set cpu DAI configuration */ 77 ret = snd_soc_dai_set_fmt(cpu_dai, dai_format); 78 if (ret) 79 return ret; 80 81 return 0; 82 } 83 84 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = { 85 .hw_params = mxs_sgtl5000_hw_params, 86 }; 87 88 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = { 89 { 90 .name = "HiFi Tx", 91 .stream_name = "HiFi Playback", 92 .codec_dai_name = "sgtl5000", 93 .ops = &mxs_sgtl5000_hifi_ops, 94 }, { 95 .name = "HiFi Rx", 96 .stream_name = "HiFi Capture", 97 .codec_dai_name = "sgtl5000", 98 .ops = &mxs_sgtl5000_hifi_ops, 99 }, 100 }; 101 102 static struct snd_soc_card mxs_sgtl5000 = { 103 .name = "mxs_sgtl5000", 104 .owner = THIS_MODULE, 105 .dai_link = mxs_sgtl5000_dai, 106 .num_links = ARRAY_SIZE(mxs_sgtl5000_dai), 107 }; 108 109 static int mxs_sgtl5000_probe_dt(struct platform_device *pdev) 110 { 111 struct device_node *np = pdev->dev.of_node; 112 struct device_node *saif_np[2], *codec_np; 113 int i; 114 115 if (!np) 116 return 1; /* no device tree */ 117 118 saif_np[0] = of_parse_phandle(np, "saif-controllers", 0); 119 saif_np[1] = of_parse_phandle(np, "saif-controllers", 1); 120 codec_np = of_parse_phandle(np, "audio-codec", 0); 121 if (!saif_np[0] || !saif_np[1] || !codec_np) { 122 dev_err(&pdev->dev, "phandle missing or invalid\n"); 123 return -EINVAL; 124 } 125 126 for (i = 0; i < 2; i++) { 127 mxs_sgtl5000_dai[i].codec_name = NULL; 128 mxs_sgtl5000_dai[i].codec_of_node = codec_np; 129 mxs_sgtl5000_dai[i].cpu_dai_name = NULL; 130 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i]; 131 mxs_sgtl5000_dai[i].platform_name = NULL; 132 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i]; 133 } 134 135 of_node_put(codec_np); 136 of_node_put(saif_np[0]); 137 of_node_put(saif_np[1]); 138 139 return 0; 140 } 141 142 static int mxs_sgtl5000_probe(struct platform_device *pdev) 143 { 144 struct snd_soc_card *card = &mxs_sgtl5000; 145 int ret; 146 147 ret = mxs_sgtl5000_probe_dt(pdev); 148 if (ret < 0) 149 return ret; 150 151 /* 152 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w). 153 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range 154 * should be >= 8MHz and <= 27M. 155 */ 156 ret = mxs_saif_get_mclk(0, 44100 * 256, 44100); 157 if (ret) 158 return ret; 159 160 card->dev = &pdev->dev; 161 platform_set_drvdata(pdev, card); 162 163 ret = snd_soc_register_card(card); 164 if (ret) { 165 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 166 ret); 167 return ret; 168 } 169 170 return 0; 171 } 172 173 static int mxs_sgtl5000_remove(struct platform_device *pdev) 174 { 175 struct snd_soc_card *card = platform_get_drvdata(pdev); 176 177 mxs_saif_put_mclk(0); 178 179 snd_soc_unregister_card(card); 180 181 return 0; 182 } 183 184 static const struct of_device_id mxs_sgtl5000_dt_ids[] = { 185 { .compatible = "fsl,mxs-audio-sgtl5000", }, 186 { /* sentinel */ } 187 }; 188 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids); 189 190 static struct platform_driver mxs_sgtl5000_audio_driver = { 191 .driver = { 192 .name = "mxs-sgtl5000", 193 .owner = THIS_MODULE, 194 .of_match_table = mxs_sgtl5000_dt_ids, 195 }, 196 .probe = mxs_sgtl5000_probe, 197 .remove = mxs_sgtl5000_remove, 198 }; 199 200 module_platform_driver(mxs_sgtl5000_audio_driver); 201 202 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 203 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver"); 204 MODULE_LICENSE("GPL"); 205 MODULE_ALIAS("platform:mxs-sgtl5000"); 206