--- /dev/null
+/*
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * 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/of_platform.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/clk.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/control.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dapm.h>
+#include <linux/pinctrl/consumer.h>
+#include "fsl_sai.h"
+#include "fsl_esai.h"
+
+#define RX 0
+#define TX 1
+
+/**
+ * CPU private data
+ *
+ * @sysclk_id[2]: SYSCLK ids for set_sysclk()
+ * @slots: number of slots supported by DAI
+ *
+ * Note: [0] for rx and [1] for tx
+ */
+struct cpu_priv {
+ u32 sysclk_id[2];
+ u32 slots;
+};
+
+struct imx_xtor_data {
+ struct snd_soc_dai_link dai[3];
+ struct snd_soc_card card;
+ struct cpu_priv cpu_priv;
+ bool is_stream_opened[2];
+ struct platform_device *asrc_pdev;
+ u32 asrc_rate;
+ u32 asrc_format;
+};
+
+static int imx_xtor_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ static struct snd_pcm_hw_constraint_list constraint_rates;
+ int ret;
+ static u32 support_rates[] = { 8000, 32000, 48000, 96000, 192000, };
+
+ 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 0;
+}
+
+static int imx_xtor_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct imx_xtor_data *data = snd_soc_card_get_drvdata(rtd->card);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ struct cpu_priv *cpu_priv = &data->cpu_priv;
+ struct device *dev = rtd->card->dev;
+ unsigned int fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
+ int ret, dir;
+ u32 freq;
+
+ /* For playback the XTOR is slave, and for record is master */
+ fmt |= tx ? SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBM_CFM;
+ dir = tx ? SND_SOC_CLOCK_OUT : SND_SOC_CLOCK_IN;
+
+ /* set cpu DAI configuration */
+ ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
+ return ret;
+ }
+
+ /* Specific configurations of DAIs starts from here */
+ freq = params_rate(params) * params_width(params) * cpu_priv->slots;
+ ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
+ freq, dir);
+ if (ret) {
+ dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, cpu_priv->slots,
+ params_width(params));
+ if (ret) {
+ dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int imx_xtor_hw_free(struct snd_pcm_substream *substream)
+{
+ return 0;
+}
+
+static void imx_xtor_shutdown(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_card *card = rtd->card;
+ struct imx_xtor_data *data = snd_soc_card_get_drvdata(card);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+
+ data->is_stream_opened[tx] = false;
+}
+
+static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_card *card = rtd->card;
+ struct imx_xtor_data *data = snd_soc_card_get_drvdata(card);
+ struct snd_interval *rate;
+ struct snd_mask *mask;
+
+ if (!data->asrc_pdev)
+ return -EINVAL;
+
+ rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ rate->max = rate->min = data->asrc_rate;
+
+ mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+ snd_mask_none(mask);
+ snd_mask_set(mask, data->asrc_format);
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_route audio_map[] = {
+ /* Line out jack */
+ {"CPU-Playback", NULL, "ASRC-Playback"},
+ {"Playback", NULL, "CPU-Playback"},/* dai route for be and fe */
+ {"ASRC-Capture", NULL, "CPU-Capture"},
+ {"CPU-Capture", NULL, "Capture"},
+};
+
+
+static struct snd_soc_ops imx_xtor_ops = {
+ .startup = imx_xtor_startup,
+ .shutdown = imx_xtor_shutdown,
+ .hw_params = imx_xtor_hw_params,
+ .hw_free = imx_xtor_hw_free,
+};
+
+static struct snd_soc_ops imx_xtor_be_ops = {
+ .hw_params = imx_xtor_hw_params,
+ .hw_free = imx_xtor_hw_free,
+};
+
+static int imx_xtor_probe(struct platform_device *pdev)
+{
+ struct device_node *cpu_np, *xtor_np = NULL;
+ struct device_node *asrc_np = NULL;
+ struct platform_device *asrc_pdev = NULL;
+ struct platform_device *cpu_pdev;
+ struct imx_xtor_data *data;
+ int ret;
+ u32 width;
+
+ cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ asrc_np = of_parse_phandle(pdev->dev.of_node, "asrc-controller", 0);
+ if (asrc_np) {
+ asrc_pdev = of_find_device_by_node(asrc_np);
+ data->asrc_pdev = asrc_pdev;
+ }
+
+ 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 (strstr(cpu_np->name, "esai")) {
+ data->cpu_priv.sysclk_id[TX] = ESAI_HCKT_EXTAL;
+ data->cpu_priv.sysclk_id[RX] = ESAI_HCKR_EXTAL;
+ } else if (strstr(cpu_np->name, "sai")) {
+ data->cpu_priv.sysclk_id[TX] = FSL_SAI_CLK_MAST1;
+ data->cpu_priv.sysclk_id[RX] = FSL_SAI_CLK_MAST1;
+ }
+ data->cpu_priv.slots = 2;
+
+ data->dai[0].name = "xtor hifi";
+ data->dai[0].stream_name = "xtor hifi";
+ data->dai[0].codec_dai_name = "snd-soc-dummy-dai";
+ data->dai[0].codec_name = "snd-soc-dummy";
+ data->dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
+ data->dai[0].platform_of_node = cpu_np;
+ data->dai[0].ops = &imx_xtor_ops;
+ data->dai[0].playback_only = false;
+ data->dai[0].capture_only = false;
+ data->card.num_links = 1;
+ data->card.dai_link = data->dai;
+
+ /*if there is no asrc controller, we only enable one device*/
+ if (asrc_pdev) {
+ data->dai[1].name = "HiFi-ASRC-FE";
+ data->dai[1].stream_name = "HiFi-ASRC-FE";
+ data->dai[1].codec_dai_name = "snd-soc-dummy-dai";
+ data->dai[1].codec_name = "snd-soc-dummy";
+ data->dai[1].cpu_of_node = asrc_np;
+ data->dai[1].platform_of_node = asrc_np;
+ data->dai[1].dynamic = 1;
+ data->dai[1].dpcm_playback = 1;
+ data->dai[1].dpcm_capture = 1;
+
+ data->dai[2].name = "HiFi-ASRC-BE";
+ data->dai[2].stream_name = "HiFi-ASRC-BE";
+ data->dai[2].codec_dai_name = "snd-soc-dummy-dai";
+ data->dai[2].codec_name = "snd-soc-dummy";
+ data->dai[2].cpu_of_node = cpu_np;
+ data->dai[2].platform_name = "snd-soc-dummy";
+ data->dai[2].no_pcm = 1;
+ data->dai[2].dpcm_playback = 1;
+ data->dai[2].dpcm_capture = 1;
+ data->dai[2].ops = &imx_xtor_be_ops,
+ data->dai[2].be_hw_params_fixup = be_hw_params_fixup,
+ data->card.num_links = 3;
+ data->card.dai_link = &data->dai[0];
+
+ ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
+ &data->asrc_rate);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get output rate\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get output rate\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ if (width == 24)
+ data->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+ else
+ data->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+ }
+
+ data->card.dapm_routes = audio_map,
+ data->card.num_dapm_routes = ARRAY_SIZE(audio_map),
+ data->card.dev = &pdev->dev;
+ data->card.owner = THIS_MODULE;
+ ret = snd_soc_of_parse_card_name(&data->card, "model");
+ if (ret)
+ goto fail;
+
+ platform_set_drvdata(pdev, &data->card);
+ snd_soc_card_set_drvdata(&data->card, data);
+ ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
+ if (ret) {
+ dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
+ goto fail;
+ }
+
+fail:
+ if (cpu_np)
+ of_node_put(cpu_np);
+ if (xtor_np)
+ of_node_put(xtor_np);
+ return ret;
+}
+
+static const struct of_device_id imx_xtor_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-xtor", },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_xtor_dt_ids);
+
+static struct platform_driver imx_xtor_driver = {
+ .driver = {
+ .name = "imx-xtor",
+ .owner = THIS_MODULE,
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = imx_xtor_dt_ids,
+ },
+ .probe = imx_xtor_probe,
+};
+module_platform_driver(imx_xtor_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale i.MX Dummy audio ASoC machine driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:imx-xtor");
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