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-rw-r--r--sound/soc/fsl/fsl-asoc-card.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
new file mode 100644
index 000000000000..007c772f3cef
--- /dev/null
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -0,0 +1,574 @@
+/*
+ * Freescale Generic ASoC Sound Card driver with ASRC
+ *
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ *
+ * Author: Nicolin Chen <nicoleotsuka@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "fsl_esai.h"
+#include "fsl_sai.h"
+#include "imx-audmux.h"
+
+#include "../codecs/sgtl5000.h"
+#include "../codecs/wm8962.h"
+
+#define RX 0
+#define TX 1
+
+/* Default DAI format without Master and Slave flag */
+#define DAI_FMT_BASE (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF)
+
+/**
+ * CODEC private data
+ *
+ * @mclk_freq: Clock rate of MCLK
+ * @mclk_id: MCLK (or main clock) id for set_sysclk()
+ * @fll_id: FLL (or secordary clock) id for set_sysclk()
+ * @pll_id: PLL id for set_pll()
+ */
+struct codec_priv {
+ unsigned long mclk_freq;
+ u32 mclk_id;
+ u32 fll_id;
+ u32 pll_id;
+};
+
+/**
+ * CPU private data
+ *
+ * @sysclk_freq[2]: SYSCLK rates for set_sysclk()
+ * @sysclk_dir[2]: SYSCLK directions for set_sysclk()
+ * @sysclk_id[2]: SYSCLK ids for set_sysclk()
+ *
+ * Note: [1] for tx and [0] for rx
+ */
+struct cpu_priv {
+ unsigned long sysclk_freq[2];
+ u32 sysclk_dir[2];
+ u32 sysclk_id[2];
+};
+
+/**
+ * Freescale Generic ASOC card private data
+ *
+ * @dai_link[3]: DAI link structure including normal one and DPCM link
+ * @pdev: platform device pointer
+ * @codec_priv: CODEC private data
+ * @cpu_priv: CPU private data
+ * @card: ASoC card structure
+ * @sample_rate: Current sample rate
+ * @sample_format: Current sample format
+ * @asrc_rate: ASRC sample rate used by Back-Ends
+ * @asrc_format: ASRC sample format used by Back-Ends
+ * @dai_fmt: DAI format between CPU and CODEC
+ * @name: Card name
+ */
+
+struct fsl_asoc_card_priv {
+ struct snd_soc_dai_link dai_link[3];
+ struct platform_device *pdev;
+ struct codec_priv codec_priv;
+ struct cpu_priv cpu_priv;
+ struct snd_soc_card card;
+ u32 sample_rate;
+ u32 sample_format;
+ u32 asrc_rate;
+ u32 asrc_format;
+ u32 dai_fmt;
+ char name[32];
+};
+
+/**
+ * This dapm route map exsits for DPCM link only.
+ * The other routes shall go through Device Tree.
+ */
+static const struct snd_soc_dapm_route audio_map[] = {
+ {"CPU-Playback", NULL, "ASRC-Playback"},
+ {"Playback", NULL, "CPU-Playback"},
+ {"ASRC-Capture", NULL, "CPU-Capture"},
+ {"CPU-Capture", NULL, "Capture"},
+};
+
+/* Add all possible widgets into here without being redundant */
+static const struct snd_soc_dapm_widget fsl_asoc_card_dapm_widgets[] = {
+ SND_SOC_DAPM_LINE("Line Out Jack", NULL),
+ SND_SOC_DAPM_LINE("Line In Jack", NULL),
+ SND_SOC_DAPM_HP("Headphone Jack", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+ SND_SOC_DAPM_MIC("Mic Jack", NULL),
+ SND_SOC_DAPM_MIC("AMIC", NULL),
+ SND_SOC_DAPM_MIC("DMIC", NULL),
+};
+
+static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ struct cpu_priv *cpu_priv = &priv->cpu_priv;
+ struct device *dev = rtd->card->dev;
+ int ret;
+
+ priv->sample_rate = params_rate(params);
+ priv->sample_format = params_format(params);
+
+ if (priv->card.set_bias_level)
+ return 0;
+
+ /* Specific configurations of DAIs starts from here */
+ ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, cpu_priv->sysclk_id[tx],
+ cpu_priv->sysclk_freq[tx],
+ cpu_priv->sysclk_dir[tx]);
+ if (ret) {
+ dev_err(dev, "failed to set sysclk for cpu dai\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct snd_soc_ops fsl_asoc_card_ops = {
+ .hw_params = fsl_asoc_card_hw_params,
+};
+
+static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+ struct snd_pcm_hw_params *params)
+{
+ struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+ struct snd_interval *rate;
+ struct snd_mask *mask;
+
+ rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ rate->max = rate->min = priv->asrc_rate;
+
+ mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+ snd_mask_none(mask);
+ snd_mask_set(mask, priv->asrc_format);
+
+ return 0;
+}
+
+static struct snd_soc_dai_link fsl_asoc_card_dai[] = {
+ /* Default ASoC DAI Link*/
+ {
+ .name = "HiFi",
+ .stream_name = "HiFi",
+ .ops = &fsl_asoc_card_ops,
+ },
+ /* DPCM Link between Front-End and Back-End (Optional) */
+ {
+ .name = "HiFi-ASRC-FE",
+ .stream_name = "HiFi-ASRC-FE",
+ .codec_name = "snd-soc-dummy",
+ .codec_dai_name = "snd-soc-dummy-dai",
+ .dpcm_playback = 1,
+ .dpcm_capture = 1,
+ .dynamic = 1,
+ },
+ {
+ .name = "HiFi-ASRC-BE",
+ .stream_name = "HiFi-ASRC-BE",
+ .platform_name = "snd-soc-dummy",
+ .be_hw_params_fixup = be_hw_params_fixup,
+ .ops = &fsl_asoc_card_ops,
+ .dpcm_playback = 1,
+ .dpcm_capture = 1,
+ .no_pcm = 1,
+ },
+};
+
+static int fsl_asoc_card_set_bias_level(struct snd_soc_card *card,
+ struct snd_soc_dapm_context *dapm,
+ enum snd_soc_bias_level level)
+{
+ struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
+ struct codec_priv *codec_priv = &priv->codec_priv;
+ struct device *dev = card->dev;
+ unsigned int pll_out;
+ int ret;
+
+ if (dapm->dev != codec_dai->dev)
+ return 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_PREPARE:
+ if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
+ break;
+
+ if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
+ pll_out = priv->sample_rate * 384;
+ else
+ pll_out = priv->sample_rate * 256;
+
+ ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id,
+ codec_priv->mclk_id,
+ codec_priv->mclk_freq, pll_out);
+ if (ret) {
+ dev_err(dev, "failed to start FLL: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->fll_id,
+ pll_out, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to set SYSCLK: %d\n", ret);
+ return ret;
+ }
+ break;
+
+ case SND_SOC_BIAS_STANDBY:
+ if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
+ break;
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
+ codec_priv->mclk_freq,
+ SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to switch away from FLL: %d\n", ret);
+ return ret;
+ }
+
+ ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id, 0, 0, 0);
+ if (ret) {
+ dev_err(dev, "failed to stop FLL: %d\n", ret);
+ return ret;
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int fsl_asoc_card_audmux_init(struct device_node *np,
+ struct fsl_asoc_card_priv *priv)
+{
+ struct device *dev = &priv->pdev->dev;
+ u32 int_ptcr = 0, ext_ptcr = 0;
+ int int_port, ext_port;
+ int ret;
+
+ ret = of_property_read_u32(np, "mux-int-port", &int_port);
+ if (ret) {
+ dev_err(dev, "mux-int-port missing or invalid\n");
+ return ret;
+ }
+ ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
+ if (ret) {
+ dev_err(dev, "mux-ext-port missing or invalid\n");
+ return ret;
+ }
+
+ /*
+ * The port numbering in the hardware manual starts at 1, while
+ * the AUDMUX API expects it starts at 0.
+ */
+ int_port--;
+ ext_port--;
+
+ /*
+ * Use asynchronous mode (6 wires) for all cases.
+ * If only 4 wires are needed, just set SSI into
+ * synchronous mode and enable 4 PADs in IOMUX.
+ */
+ switch (priv->dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
+ IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
+ IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_RFSDIR |
+ IMX_AUDMUX_V2_PTCR_RCLKDIR |
+ IMX_AUDMUX_V2_PTCR_TFSDIR |
+ IMX_AUDMUX_V2_PTCR_TCLKDIR;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ int_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | ext_port) |
+ IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_RCLKDIR |
+ IMX_AUDMUX_V2_PTCR_TCLKDIR;
+ ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
+ IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
+ IMX_AUDMUX_V2_PTCR_RFSDIR |
+ IMX_AUDMUX_V2_PTCR_TFSDIR;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ int_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | ext_port) |
+ IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
+ IMX_AUDMUX_V2_PTCR_RFSDIR |
+ IMX_AUDMUX_V2_PTCR_TFSDIR;
+ ext_ptcr = IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
+ IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
+ IMX_AUDMUX_V2_PTCR_RCLKDIR |
+ IMX_AUDMUX_V2_PTCR_TCLKDIR;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ ext_ptcr = IMX_AUDMUX_V2_PTCR_RFSEL(8 | int_port) |
+ IMX_AUDMUX_V2_PTCR_RCSEL(8 | int_port) |
+ IMX_AUDMUX_V2_PTCR_TFSEL(int_port) |
+ IMX_AUDMUX_V2_PTCR_TCSEL(int_port) |
+ IMX_AUDMUX_V2_PTCR_RFSDIR |
+ IMX_AUDMUX_V2_PTCR_RCLKDIR |
+ IMX_AUDMUX_V2_PTCR_TFSDIR |
+ IMX_AUDMUX_V2_PTCR_TCLKDIR;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Asynchronous mode can not be set along with RCLKDIR */
+ ret = imx_audmux_v2_configure_port(int_port, 0,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
+ if (ret) {
+ dev_err(dev, "audmux internal port setup failed\n");
+ return ret;
+ }
+
+ ret = imx_audmux_v2_configure_port(int_port, int_ptcr,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port));
+ if (ret) {
+ dev_err(dev, "audmux internal port setup failed\n");
+ return ret;
+ }
+
+ ret = imx_audmux_v2_configure_port(ext_port, 0,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
+ if (ret) {
+ dev_err(dev, "audmux external port setup failed\n");
+ return ret;
+ }
+
+ ret = imx_audmux_v2_configure_port(ext_port, ext_ptcr,
+ IMX_AUDMUX_V2_PDCR_RXDSEL(int_port));
+ if (ret) {
+ dev_err(dev, "audmux external port setup failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fsl_asoc_card_late_probe(struct snd_soc_card *card)
+{
+ struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
+ struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
+ struct codec_priv *codec_priv = &priv->codec_priv;
+ struct device *dev = card->dev;
+ int ret;
+
+ ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
+ codec_priv->mclk_freq, SND_SOC_CLOCK_IN);
+ if (ret) {
+ dev_err(dev, "failed to set sysclk in %s\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int fsl_asoc_card_probe(struct platform_device *pdev)
+{
+ struct device_node *cpu_np, *codec_np, *asrc_np;
+ struct device_node *np = pdev->dev.of_node;
+ struct platform_device *asrc_pdev = NULL;
+ struct platform_device *cpu_pdev;
+ struct fsl_asoc_card_priv *priv;
+ struct i2c_client *codec_dev;
+ struct clk *codec_clk;
+ u32 width;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ cpu_np = of_parse_phandle(np, "audio-cpu", 0);
+ /* Give a chance to old DT binding */
+ if (!cpu_np)
+ cpu_np = of_parse_phandle(np, "ssi-controller", 0);
+ codec_np = of_parse_phandle(np, "audio-codec", 0);
+ if (!cpu_np || !codec_np) {
+ dev_err(&pdev->dev, "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 CPU DAI device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ codec_dev = of_find_i2c_device_by_node(codec_np);
+ if (!codec_dev) {
+ dev_err(&pdev->dev, "failed to find codec platform device\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ asrc_np = of_parse_phandle(np, "audio-asrc", 0);
+ if (asrc_np)
+ asrc_pdev = of_find_device_by_node(asrc_np);
+
+ /* Get the MCLK rate only, and leave it controlled by CODEC drivers */
+ codec_clk = clk_get(&codec_dev->dev, NULL);
+ if (!IS_ERR(codec_clk)) {
+ priv->codec_priv.mclk_freq = clk_get_rate(codec_clk);
+ clk_put(codec_clk);
+ }
+
+ /* Default sample rate and format, will be updated in hw_params() */
+ priv->sample_rate = 44100;
+ priv->sample_format = SNDRV_PCM_FORMAT_S16_LE;
+
+ /* Assign a default DAI format, and allow each card to overwrite it */
+ priv->dai_fmt = DAI_FMT_BASE;
+
+ /* Diversify the card configurations */
+ if (of_device_is_compatible(np, "fsl,imx-audio-cs42888")) {
+ priv->card.set_bias_level = NULL;
+ priv->cpu_priv.sysclk_freq[TX] = priv->codec_priv.mclk_freq;
+ priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
+ priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
+ priv->cpu_priv.sysclk_dir[RX] = SND_SOC_CLOCK_OUT;
+ priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
+ } else if (of_device_is_compatible(np, "fsl,imx-audio-sgtl5000")) {
+ priv->codec_priv.mclk_id = SGTL5000_SYSCLK;
+ priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+ } else if (of_device_is_compatible(np, "fsl,imx-audio-wm8962")) {
+ priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
+ priv->codec_priv.mclk_id = WM8962_SYSCLK_MCLK;
+ priv->codec_priv.fll_id = WM8962_SYSCLK_FLL;
+ priv->codec_priv.pll_id = WM8962_FLL;
+ priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
+ } else {
+ dev_err(&pdev->dev, "unknown Device Tree compatible\n");
+ return -EINVAL;
+ }
+
+ /* Common settings for corresponding Freescale CPU DAI driver */
+ if (strstr(cpu_np->name, "ssi")) {
+ /* Only SSI needs to configure AUDMUX */
+ ret = fsl_asoc_card_audmux_init(np, priv);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to init audmux\n");
+ goto asrc_fail;
+ }
+ } else if (strstr(cpu_np->name, "esai")) {
+ priv->cpu_priv.sysclk_id[1] = ESAI_HCKT_EXTAL;
+ priv->cpu_priv.sysclk_id[0] = ESAI_HCKR_EXTAL;
+ } else if (strstr(cpu_np->name, "sai")) {
+ priv->cpu_priv.sysclk_id[1] = FSL_SAI_CLK_MAST1;
+ priv->cpu_priv.sysclk_id[0] = FSL_SAI_CLK_MAST1;
+ }
+
+ sprintf(priv->name, "%s-audio", codec_dev->name);
+
+ /* Initialize sound card */
+ priv->pdev = pdev;
+ priv->card.dev = &pdev->dev;
+ priv->card.name = priv->name;
+ priv->card.dai_link = priv->dai_link;
+ priv->card.dapm_routes = audio_map;
+ priv->card.late_probe = fsl_asoc_card_late_probe;
+ priv->card.num_dapm_routes = ARRAY_SIZE(audio_map);
+ priv->card.dapm_widgets = fsl_asoc_card_dapm_widgets;
+ priv->card.num_dapm_widgets = ARRAY_SIZE(fsl_asoc_card_dapm_widgets);
+
+ memcpy(priv->dai_link, fsl_asoc_card_dai,
+ sizeof(struct snd_soc_dai_link) * ARRAY_SIZE(priv->dai_link));
+
+ /* Normal DAI Link */
+ priv->dai_link[0].cpu_of_node = cpu_np;
+ priv->dai_link[0].codec_of_node = codec_np;
+ priv->dai_link[0].codec_dai_name = codec_dev->name;
+ priv->dai_link[0].platform_of_node = cpu_np;
+ priv->dai_link[0].dai_fmt = priv->dai_fmt;
+ priv->card.num_links = 1;
+
+ if (asrc_pdev) {
+ /* DPCM DAI Links only if ASRC exsits */
+ priv->dai_link[1].cpu_of_node = asrc_np;
+ priv->dai_link[1].platform_of_node = asrc_np;
+ priv->dai_link[2].codec_dai_name = codec_dev->name;
+ priv->dai_link[2].codec_of_node = codec_np;
+ priv->dai_link[2].cpu_of_node = cpu_np;
+ priv->dai_link[2].dai_fmt = priv->dai_fmt;
+ priv->card.num_links = 3;
+
+ ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
+ &priv->asrc_rate);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get output rate\n");
+ ret = -EINVAL;
+ goto asrc_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 asrc_fail;
+ }
+
+ if (width == 24)
+ priv->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
+ else
+ priv->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
+ }
+
+ /* Finish card registering */
+ platform_set_drvdata(pdev, priv);
+ 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);
+
+asrc_fail:
+ of_node_put(asrc_np);
+fail:
+ of_node_put(codec_np);
+ of_node_put(cpu_np);
+
+ return ret;
+}
+
+static const struct of_device_id fsl_asoc_card_dt_ids[] = {
+ { .compatible = "fsl,imx-audio-cs42888", },
+ { .compatible = "fsl,imx-audio-sgtl5000", },
+ { .compatible = "fsl,imx-audio-wm8962", },
+ {}
+};
+
+static struct platform_driver fsl_asoc_card_driver = {
+ .probe = fsl_asoc_card_probe,
+ .driver = {
+ .name = "fsl-asoc-card",
+ .pm = &snd_soc_pm_ops,
+ .of_match_table = fsl_asoc_card_dt_ids,
+ },
+};
+module_platform_driver(fsl_asoc_card_driver);
+
+MODULE_DESCRIPTION("Freescale Generic ASoC Sound Card driver with ASRC");
+MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
+MODULE_ALIAS("platform:fsl-asoc-card");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 05:25:43 +0100