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 dai_format, 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 /* Sgtl5000 sysclk should be >= 8MHz and <= 27M */ 53 if (mclk < 8000000 || mclk > 27000000) { 54 dev_err(codec_dai->dev, "Invalid mclk frequency: %u.%03uMHz\n", 55 mclk / 1000000, mclk / 1000 % 1000); 56 return -EINVAL; 57 } 58 59 /* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */ 60 ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0); 61 if (ret) { 62 dev_err(codec_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", 63 mclk / 1000000, mclk / 1000 % 1000); 64 return ret; 65 } 66 67 /* The SAIF MCLK should be the same as SGTL5000_SYSCLK */ 68 ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0); 69 if (ret) { 70 dev_err(cpu_dai->dev, "Failed to set sysclk to %u.%03uMHz\n", 71 mclk / 1000000, mclk / 1000 % 1000); 72 return ret; 73 } 74 75 /* set codec to slave mode */ 76 dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 77 SND_SOC_DAIFMT_CBS_CFS; 78 79 /* set codec DAI configuration */ 80 ret = snd_soc_dai_set_fmt(codec_dai, dai_format); 81 if (ret) { 82 dev_err(codec_dai->dev, "Failed to set dai format to %08x\n", 83 dai_format); 84 return ret; 85 } 86 87 /* set cpu DAI configuration */ 88 ret = snd_soc_dai_set_fmt(cpu_dai, dai_format); 89 if (ret) { 90 dev_err(cpu_dai->dev, "Failed to set dai format to %08x\n", 91 dai_format); 92 return ret; 93 } 94 95 return 0; 96 } 97 98 static struct snd_soc_ops mxs_sgtl5000_hifi_ops = { 99 .hw_params = mxs_sgtl5000_hw_params, 100 }; 101 102 static struct snd_soc_dai_link mxs_sgtl5000_dai[] = { 103 { 104 .name = "HiFi Tx", 105 .stream_name = "HiFi Playback", 106 .codec_dai_name = "sgtl5000", 107 .ops = &mxs_sgtl5000_hifi_ops, 108 .playback_only = true, 109 }, { 110 .name = "HiFi Rx", 111 .stream_name = "HiFi Capture", 112 .codec_dai_name = "sgtl5000", 113 .ops = &mxs_sgtl5000_hifi_ops, 114 .capture_only = true, 115 }, 116 }; 117 118 static struct snd_soc_card mxs_sgtl5000 = { 119 .name = "mxs_sgtl5000", 120 .owner = THIS_MODULE, 121 .dai_link = mxs_sgtl5000_dai, 122 .num_links = ARRAY_SIZE(mxs_sgtl5000_dai), 123 }; 124 125 static int mxs_sgtl5000_probe_dt(struct platform_device *pdev) 126 { 127 struct device_node *np = pdev->dev.of_node; 128 struct device_node *saif_np[2], *codec_np; 129 int i; 130 131 if (!np) 132 return 1; /* no device tree */ 133 134 saif_np[0] = of_parse_phandle(np, "saif-controllers", 0); 135 saif_np[1] = of_parse_phandle(np, "saif-controllers", 1); 136 codec_np = of_parse_phandle(np, "audio-codec", 0); 137 if (!saif_np[0] || !saif_np[1] || !codec_np) { 138 dev_err(&pdev->dev, "phandle missing or invalid\n"); 139 return -EINVAL; 140 } 141 142 for (i = 0; i < 2; i++) { 143 mxs_sgtl5000_dai[i].codec_name = NULL; 144 mxs_sgtl5000_dai[i].codec_of_node = codec_np; 145 mxs_sgtl5000_dai[i].cpu_dai_name = NULL; 146 mxs_sgtl5000_dai[i].cpu_of_node = saif_np[i]; 147 mxs_sgtl5000_dai[i].platform_name = NULL; 148 mxs_sgtl5000_dai[i].platform_of_node = saif_np[i]; 149 } 150 151 of_node_put(codec_np); 152 of_node_put(saif_np[0]); 153 of_node_put(saif_np[1]); 154 155 return 0; 156 } 157 158 static int mxs_sgtl5000_probe(struct platform_device *pdev) 159 { 160 struct snd_soc_card *card = &mxs_sgtl5000; 161 int ret; 162 163 ret = mxs_sgtl5000_probe_dt(pdev); 164 if (ret < 0) 165 return ret; 166 167 /* 168 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w). 169 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range 170 * should be >= 8MHz and <= 27M. 171 */ 172 ret = mxs_saif_get_mclk(0, 44100 * 256, 44100); 173 if (ret) { 174 dev_err(&pdev->dev, "failed to get mclk\n"); 175 return ret; 176 } 177 178 card->dev = &pdev->dev; 179 platform_set_drvdata(pdev, card); 180 181 ret = snd_soc_register_card(card); 182 if (ret) { 183 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", 184 ret); 185 return ret; 186 } 187 188 return 0; 189 } 190 191 static int mxs_sgtl5000_remove(struct platform_device *pdev) 192 { 193 struct snd_soc_card *card = platform_get_drvdata(pdev); 194 195 mxs_saif_put_mclk(0); 196 197 snd_soc_unregister_card(card); 198 199 return 0; 200 } 201 202 static const struct of_device_id mxs_sgtl5000_dt_ids[] = { 203 { .compatible = "fsl,mxs-audio-sgtl5000", }, 204 { /* sentinel */ } 205 }; 206 MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids); 207 208 static struct platform_driver mxs_sgtl5000_audio_driver = { 209 .driver = { 210 .name = "mxs-sgtl5000", 211 .owner = THIS_MODULE, 212 .of_match_table = mxs_sgtl5000_dt_ids, 213 }, 214 .probe = mxs_sgtl5000_probe, 215 .remove = mxs_sgtl5000_remove, 216 }; 217 218 module_platform_driver(mxs_sgtl5000_audio_driver); 219 220 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 221 MODULE_DESCRIPTION("MXS ALSA SoC Machine driver"); 222 MODULE_LICENSE("GPL"); 223 MODULE_ALIAS("platform:mxs-sgtl5000"); 224