diff options
Diffstat (limited to 'sound/soc/fsl/imx-ak4458.c')
-rw-r--r-- | sound/soc/fsl/imx-ak4458.c | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-ak4458.c b/sound/soc/fsl/imx-ak4458.c new file mode 100644 index 000000000000..0dd3e8a15983 --- /dev/null +++ b/sound/soc/fsl/imx-ak4458.c @@ -0,0 +1,398 @@ +/* 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/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/gpio/consumer.h> +#include <linux/of_device.h> +#include <linux/i2c.h> +#include <linux/of_gpio.h> +#include <linux/clk.h> +#include <sound/soc.h> +#include <sound/pcm_params.h> +#include <sound/pcm.h> +#include <sound/soc-dapm.h> + +#include "fsl_sai.h" + +struct imx_ak4458_data { + struct snd_soc_card card; + int num_codec_conf; + struct snd_soc_codec_conf *codec_conf; + bool tdm_mode; + int pdn_gpio; + unsigned int slots; + unsigned int slot_width; + bool one2one_ratio; +}; + +static struct snd_soc_dapm_widget imx_ak4458_dapm_widgets[] = { + SND_SOC_DAPM_LINE("Line Out", NULL), +}; + +/** + * Tables 3 & 4 - mapping LRCK fs and frame width + */ +static const struct imx_ak4458_fs_map { + unsigned int rmin; + unsigned int rmax; + unsigned int wmin; + unsigned int wmax; +} fs_map[] = { + /* Normal, < 32kHz */ + { .rmin = 8000, .rmax = 24000, .wmin = 1024, .wmax = 1024, }, + /* Normal, 32kHz */ + { .rmin = 32000, .rmax = 32000, .wmin = 256, .wmax = 1024, }, + /* Normal */ + { .rmin = 44100, .rmax = 48000, .wmin = 256, .wmax = 768, }, + /* Double */ + { .rmin = 88200, .rmax = 96000, .wmin = 256, .wmax = 512, }, + /* Quad */ + { .rmin = 176400, .rmax = 192000, .wmin = 128, .wmax = 256, }, + /* Oct */ + { .rmin = 352800, .rmax = 384000, .wmin = 32, .wmax = 128, }, + /* Hex */ + { .rmin = 705600, .rmax = 768000, .wmin = 16, .wmax = 64, }, +}; + +static const struct imx_ak4458_fs_mul { + unsigned int min; + unsigned int max; + unsigned int mul; +} fs_mul_tdm[] = { + /* + * Table 13 - Audio Interface Format + * For TDM mode, MCLK should is set to + * obtained from 2 * slots * slot_width + */ + { .min = 128, .max = 128, .mul = 256 }, /* TDM128 */ + { .min = 256, .max = 256, .mul = 512 }, /* TDM256 */ + { .min = 512, .max = 512, .mul = 1024 }, /* TDM512 */ +}; + +static const u32 ak4458_rates[] = { + 8000, 11025, 16000, 22050, + 32000, 44100, 48000, 88200, + 96000, 176400, 192000, 352800, + 384000, 705600, 768000, +}; + +static const u32 ak4458_rates_tdm[] = { + 8000, 16000, 32000, + 48000, 96000, +}; + +static const u32 ak4458_channels[] = { + 1, 2, 4, 6, 8, 10, 12, 14, 16, +}; + +static const u32 ak4458_channels_tdm[] = { + 1, 2, 3, 4, 5, 6, 7, 8, +}; + +static unsigned long ak4458_get_mclk_rate(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct imx_ak4458_data *data = snd_soc_card_get_drvdata(rtd->card); + unsigned int rate = params_rate(params); + unsigned int width = data->slots * data->slot_width; + int i, mode; + + if (data->tdm_mode) { + /* can be 128, 256 or 512 */ + mode = data->slots * data->slot_width; + + for (i = 0; i < ARRAY_SIZE(fs_mul_tdm); i++) { + /* min = max = slots * slots_width */ + if (mode != fs_mul_tdm[i].min) + continue; + return rate * fs_mul_tdm[i].mul; + } + } else { + for (i = 0; i < ARRAY_SIZE(fs_map); i++) { + if (rate >= fs_map[i].rmin && rate <= fs_map[i].rmax) { + width = max(width, fs_map[i].wmin); + width = min(width, fs_map[i].wmax); + + /* Adjust SAI bclk:mclk ratio */ + width *= data->one2one_ratio ? 1 : 2; + + return rate * width; + } + } + } + + /* Let DAI manage clk frequency by default */ + return 0; +} + +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_card *card = rtd->card; + struct device *dev = card->dev; + struct imx_ak4458_data *data = snd_soc_card_get_drvdata(card); + unsigned int channels = params_channels(params); + unsigned int fmt = SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS; + unsigned long mclk_freq; + int ret, i; + + if (data->tdm_mode) { + data->slots = 8; + data->slot_width = 32; + } else { + data->slots = 2; + data->slot_width = params_physical_width(params); + } + + fmt |= data->tdm_mode ? SND_SOC_DAIFMT_DSP_B : SND_SOC_DAIFMT_I2S; + + 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_tdm_slot(cpu_dai, + BIT(channels) - 1, BIT(channels) - 1, + data->slots, data->slot_width); + if (ret) { + dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); + return ret; + } + + for (i = 0; i < rtd->num_codecs; i++) { + struct snd_soc_dai *codec_dai = rtd->codec_dais[i]; + + ret = snd_soc_dai_set_fmt(codec_dai, fmt); + if (ret) { + dev_err(dev, "failed to set codec dai[%d] fmt: %d\n", + i, ret); + return ret; + } + ret = snd_soc_dai_set_tdm_slot(codec_dai, + BIT(channels) - 1, BIT(channels) - 1, + data->slots, data->slot_width); + if (ret) { + dev_err(dev, "failed to set codec dai[%d] tdm slot: %d\n", + i, ret); + return ret; + } + } + + /* set MCLK freq */ + mclk_freq = ak4458_get_mclk_rate(substream, params); + ret = snd_soc_dai_set_sysclk(cpu_dai, FSL_SAI_CLK_MAST1, mclk_freq, + SND_SOC_CLOCK_OUT); + if (ret < 0) + dev_err(dev, "failed to set cpui dai mclk1 rate (%lu): %d\n", + mclk_freq, ret); + return ret; +} + +static int imx_aif_startup(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_card *card = rtd->card; + struct imx_ak4458_data *data = snd_soc_card_get_drvdata(card); + static struct snd_pcm_hw_constraint_list constraint_rates; + static struct snd_pcm_hw_constraint_list constraint_channels; + int ret; + + if (data->tdm_mode) { + constraint_channels.list = ak4458_channels_tdm; + constraint_channels.count = ARRAY_SIZE(ak4458_channels_tdm); + constraint_rates.list = ak4458_rates_tdm; + constraint_rates.count = ARRAY_SIZE(ak4458_rates_tdm); + } else { + constraint_channels.list = ak4458_channels; + constraint_channels.count = ARRAY_SIZE(ak4458_channels); + constraint_rates.list = ak4458_rates; + constraint_rates.count = ARRAY_SIZE(ak4458_rates); + } + + ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, + &constraint_channels); + if (ret) + return ret; + + ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + &constraint_rates); + if (ret) + return ret; + + return 0; +} + +static struct snd_soc_ops imx_aif_ops = { + .hw_params = imx_aif_hw_params, + .startup = imx_aif_startup, +}; + +static struct snd_soc_dai_link_component ak4458_codecs[] = { + { + /* Playback */ + .dai_name = "ak4458-aif", + }, + { + /* Capture */ + .dai_name = "ak4458-aif", + }, +}; + +static struct snd_soc_dai_link imx_ak4458_dai = { + .name = "ak4458", + .stream_name = "Audio", + .codecs = ak4458_codecs, + .num_codecs = 2, + .ignore_pmdown_time = 1, + .ops = &imx_aif_ops, + .playback_only = 1, +}; + +static int imx_ak4458_probe(struct platform_device *pdev) +{ + struct imx_ak4458_data *priv; + struct device_node *cpu_np, *codec_np_0 = NULL, *codec_np_1 = NULL; + struct platform_device *cpu_pdev; + 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_0 = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0); + if (!codec_np_0) { + dev_err(&pdev->dev, "audio codec phandle missing or invalid\n"); + ret = -EINVAL; + goto fail; + } + + codec_np_1 = of_parse_phandle(pdev->dev.of_node, "audio-codec", 1); + if (!codec_np_1) { + 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; + } + + if (of_find_property(pdev->dev.of_node, "fsl,tdm", NULL)) + priv->tdm_mode = true; + + priv->num_codec_conf = 2; + priv->codec_conf = devm_kzalloc(&pdev->dev, + priv->num_codec_conf * sizeof(struct snd_soc_codec_conf), + GFP_KERNEL); + if (!priv->codec_conf) { + ret = -ENOMEM; + goto fail; + } + + priv->codec_conf[0].name_prefix = "0"; + priv->codec_conf[0].of_node = codec_np_0; + priv->codec_conf[1].name_prefix = "1"; + priv->codec_conf[1].of_node = codec_np_1; + + ak4458_codecs[0].of_node = codec_np_0; + ak4458_codecs[1].of_node = codec_np_1; + + imx_ak4458_dai.cpu_dai_name = dev_name(&cpu_pdev->dev); + imx_ak4458_dai.platform_of_node = cpu_np; + + priv->card.num_links = 1; + priv->card.dai_link = &imx_ak4458_dai; + priv->card.dev = &pdev->dev; + priv->card.owner = THIS_MODULE; + priv->card.dapm_widgets = imx_ak4458_dapm_widgets; + priv->card.num_dapm_widgets = ARRAY_SIZE(imx_ak4458_dapm_widgets); + priv->card.codec_conf = priv->codec_conf; + priv->card.num_configs = priv->num_codec_conf; + priv->one2one_ratio = !of_device_is_compatible(pdev->dev.of_node, + "fsl,imx-audio-ak4458-mq"); + + priv->pdn_gpio = of_get_named_gpio(pdev->dev.of_node, "ak4458,pdn-gpio", 0); + if (gpio_is_valid(priv->pdn_gpio)) { + ret = devm_gpio_request_one(&pdev->dev, priv->pdn_gpio, + GPIOF_OUT_INIT_LOW, "ak4458,pdn"); + if (ret) { + dev_err(&pdev->dev, "unable to get pdn gpio\n"); + goto fail; + } + + gpio_set_value_cansleep(priv->pdn_gpio, 0); + usleep_range(1000, 2000); + gpio_set_value_cansleep(priv->pdn_gpio, 1); + usleep_range(1000, 2000); + } + + 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_0) + of_node_put(codec_np_0); + if (codec_np_1) + of_node_put(codec_np_1); + + return ret; +} + +static const struct of_device_id imx_ak4458_dt_ids[] = { + { .compatible = "fsl,imx-audio-ak4458", }, + { .compatible = "fsl,imx-audio-ak4458-mq", }, + { }, +}; +MODULE_DEVICE_TABLE(of, imx_ak4458_dt_ids); + +static struct platform_driver imx_ak4458_driver = { + .driver = { + .name = "imx-ak4458", + .pm = &snd_soc_pm_ops, + .of_match_table = imx_ak4458_dt_ids, + }, + .probe = imx_ak4458_probe, +}; +module_platform_driver(imx_ak4458_driver); + +MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>"); +MODULE_DESCRIPTION("Freescale i.MX AK4458 ASoC machine driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:imx-ak4458"); |