| /* i.MX AK4458 audio support |
| * |
| * Copyright 2017 NXP |
| * |
| * The code contained herein is licensed under the GNU General Public |
| * License. You may obtain a copy of the GNU General Public License |
| * Version 2 or later at the following locations: |
| * |
| * http://www.opensource.org/licenses/gpl-license.html |
| * http://www.gnu.org/copyleft/gpl.html |
| */ |
| |
| #include <linux/clk.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/of_device.h> |
| #include <sound/soc.h> |
| #include <sound/pcm_params.h> |
| #include <sound/soc-dapm.h> |
| |
| #include "../codecs/ak4497.h" |
| #include "fsl_sai.h" |
| |
| struct imx_ak4497_data { |
| struct snd_soc_card card; |
| unsigned long freq; |
| }; |
| |
| static struct snd_soc_dapm_widget imx_ak4497_dapm_widgets[] = { |
| SND_SOC_DAPM_LINE("Line Out", NULL), |
| }; |
| |
| static const struct imx_ak4497_fs_mul { |
| unsigned int min; |
| unsigned int max; |
| unsigned int mul; |
| } fs_mul[] = { |
| /** |
| * Table 7 - mapping multiplier and speed mode |
| * Tables 8 & 9 - mapping speed mode and LRCK fs |
| */ |
| { .min = 8000, .max = 32000, .mul = 1024 }, /* Normal, <= 32kHz */ |
| { .min = 44100, .max = 48000, .mul = 512 }, /* Normal */ |
| { .min = 88200, .max = 96000, .mul = 256 }, /* Double */ |
| { .min = 176400, .max = 192000, .mul = 128 }, /* Quad */ |
| { .min = 352800, .max = 384000, .mul = 2*64 }, /* Oct */ |
| { .min = 705600, .max = 768000, .mul = 2*32 }, /* Hex */ |
| }; |
| |
| static bool imx_ak4497_is_dsd(struct snd_pcm_hw_params *params) |
| { |
| snd_pcm_format_t format = params_format(params); |
| |
| switch (format) { |
| case SNDRV_PCM_FORMAT_DSD_U8: |
| case SNDRV_PCM_FORMAT_DSD_U16_LE: |
| case SNDRV_PCM_FORMAT_DSD_U16_BE: |
| case SNDRV_PCM_FORMAT_DSD_U32_LE: |
| case SNDRV_PCM_FORMAT_DSD_U32_BE: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static unsigned long imx_ak4497_compute_freq(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct imx_ak4497_data *priv = snd_soc_card_get_drvdata(rtd->card); |
| unsigned int rate = params_rate(params); |
| int i; |
| |
| if (imx_ak4497_is_dsd(params)) |
| return priv->freq; |
| |
| /* Find the appropriate MCLK freq */ |
| for (i = 0; i < ARRAY_SIZE(fs_mul); i++) { |
| if (rate >= fs_mul[i].min && rate <= fs_mul[i].max) |
| return params_rate(params) * fs_mul[i].mul; |
| } |
| |
| /* Return default MCLK frequency */ |
| return priv->freq; |
| } |
| |
| static int imx_aif_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| struct snd_soc_card *card = rtd->card; |
| struct device *dev = card->dev; |
| unsigned int channels = params_channels(params); |
| unsigned int fmt = SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS; |
| unsigned long freq = imx_ak4497_compute_freq(substream, params); |
| bool is_dsd = imx_ak4497_is_dsd(params); |
| int ret; |
| |
| fmt |= (is_dsd ? SND_SOC_DAIFMT_PDM : SND_SOC_DAIFMT_I2S); |
| |
| ret = snd_soc_dai_set_sysclk(cpu_dai, FSL_SAI_CLK_MAST1, freq, |
| SND_SOC_CLOCK_OUT); |
| if (ret < 0) { |
| dev_err(dev, "failed to set cpu dai mclk1 rate(%lu): %d\n", |
| freq, ret); |
| return ret; |
| } |
| |
| ret = snd_soc_dai_set_fmt(cpu_dai, fmt); |
| if (ret) { |
| dev_err(dev, "failed to set cpu dai fmt: %d\n", ret); |
| return ret; |
| } |
| |
| ret = snd_soc_dai_set_fmt(codec_dai, fmt); |
| if (ret) { |
| dev_err(dev, "failed to set codec dai fmt: %d\n", ret); |
| return ret; |
| } |
| |
| if (is_dsd) |
| ret = snd_soc_dai_set_tdm_slot(cpu_dai, |
| 0x1, 0x1, |
| 1, params_width(params)); |
| else |
| ret = snd_soc_dai_set_tdm_slot(cpu_dai, |
| BIT(channels) - 1, BIT(channels) - 1, |
| 2, params_physical_width(params)); |
| if (ret) { |
| dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static const u32 support_rates[] = { |
| 11025, 22050, 44100, |
| 88200, 176400, 352800, |
| 705600, 1411200, 2822400, |
| }; |
| |
| static int imx_aif_startup(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| int ret = 0; |
| static struct snd_pcm_hw_constraint_list constraint_rates; |
| |
| constraint_rates.list = support_rates; |
| constraint_rates.count = ARRAY_SIZE(support_rates); |
| |
| ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| &constraint_rates); |
| if (ret) |
| return ret; |
| |
| return ret; |
| } |
| |
| static struct snd_soc_ops imx_aif_ops = { |
| .startup = imx_aif_startup, |
| .hw_params = imx_aif_hw_params, |
| }; |
| |
| static struct snd_soc_dai_link imx_ak4497_dai = { |
| .name = "ak4497", |
| .stream_name = "Audio", |
| .codec_dai_name = "ak4497-aif", |
| .ops = &imx_aif_ops, |
| .playback_only = 1, |
| }; |
| |
| static int imx_ak4497_probe(struct platform_device *pdev) |
| { |
| struct imx_ak4497_data *priv; |
| struct device_node *cpu_np, *codec_np = NULL; |
| struct platform_device *cpu_pdev; |
| struct clk *mclk; |
| int ret; |
| |
| priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| cpu_np = of_parse_phandle(pdev->dev.of_node, "audio-cpu", 0); |
| if (!cpu_np) { |
| dev_err(&pdev->dev, "audio dai phandle missing or invalid\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0); |
| if (!codec_np) { |
| dev_err(&pdev->dev, "audio codec phandle missing or invalid\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| cpu_pdev = of_find_device_by_node(cpu_np); |
| if (!cpu_pdev) { |
| dev_err(&pdev->dev, "failed to find SAI platform device\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| imx_ak4497_dai.codec_of_node = codec_np; |
| imx_ak4497_dai.cpu_dai_name = dev_name(&cpu_pdev->dev); |
| imx_ak4497_dai.platform_of_node = cpu_np; |
| imx_ak4497_dai.playback_only = 1; |
| |
| priv->card.dai_link = &imx_ak4497_dai; |
| priv->card.num_links = 1; |
| priv->card.dev = &pdev->dev; |
| priv->card.owner = THIS_MODULE; |
| priv->card.dapm_widgets = imx_ak4497_dapm_widgets; |
| priv->card.num_dapm_widgets = ARRAY_SIZE(imx_ak4497_dapm_widgets); |
| |
| mclk = devm_clk_get(&cpu_pdev->dev, "mclk1"); |
| if (IS_ERR_OR_NULL(mclk)) { |
| dev_err(&pdev->dev, "failed to get DAI mclk1\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| priv->freq = clk_get_rate(mclk); |
| |
| ret = snd_soc_of_parse_card_name(&priv->card, "model"); |
| if (ret) |
| goto fail; |
| |
| snd_soc_card_set_drvdata(&priv->card, priv); |
| |
| ret = devm_snd_soc_register_card(&pdev->dev, &priv->card); |
| if (ret) { |
| dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret); |
| goto fail; |
| } |
| |
| ret = 0; |
| fail: |
| if (cpu_np) |
| of_node_put(cpu_np); |
| if (codec_np) |
| of_node_put(codec_np); |
| |
| return ret; |
| } |
| |
| static const struct of_device_id imx_ak4497_dt_ids[] = { |
| { .compatible = "fsl,imx-audio-ak4497", }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, imx_ak4497_dt_ids); |
| |
| static struct platform_driver imx_ak4497_driver = { |
| .driver = { |
| .name = "imx-ak4497", |
| .pm = &snd_soc_pm_ops, |
| .of_match_table = imx_ak4497_dt_ids, |
| }, |
| .probe = imx_ak4497_probe, |
| }; |
| module_platform_driver(imx_ak4497_driver); |
| |
| MODULE_AUTHOR("Daniel Baluta <daniel.baluta@nxp.com>"); |
| MODULE_DESCRIPTION("Freescale i.MX AK4497 ASoC machine driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:imx-ak4497"); |