/* * Copyright 2013 Freescale Semiconductor, Inc. * * Based on imx-sgtl5000.c * Copyright 2012 Freescale Semiconductor, Inc. * Copyright 2012 Linaro Ltd. * * 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/slab.h> #include <linux/clk.h> #include <sound/soc.h> #include <sound/pcm_params.h> #include <sound/soc-dapm.h> #include <linux/pinctrl/consumer.h> #include "../codecs/wm8962.h" #include "imx-audmux.h" #define DAI_NAME_SIZE 32 struct imx_wm8962_data { struct snd_soc_dai_link dai; struct snd_soc_card card; char codec_dai_name[DAI_NAME_SIZE]; char platform_name[DAI_NAME_SIZE]; struct clk *codec_clk; unsigned int clk_frequency; }; struct imx_priv { struct platform_device *pdev; }; static struct imx_priv card_priv; static const struct snd_soc_dapm_widget imx_wm8962_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_SPK("Ext Spk", NULL), SND_SOC_DAPM_MIC("AMIC", NULL), SND_SOC_DAPM_MIC("DMIC", NULL), }; static int sample_rate = 44100; static snd_pcm_format_t sample_format = SNDRV_PCM_FORMAT_S16_LE; static int imx_hifi_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { sample_rate = params_rate(params); sample_format = params_format(params); return 0; } static struct snd_soc_ops imx_hifi_ops = { .hw_params = imx_hifi_hw_params, }; static int imx_wm8962_set_bias_level(struct snd_soc_card *card, struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level) { struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; struct imx_priv *priv = &card_priv; struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev); struct device *dev = &priv->pdev->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) { if (sample_format == SNDRV_PCM_FORMAT_S24_LE) pll_out = sample_rate * 384; else pll_out = sample_rate * 256; ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL, WM8962_FLL_MCLK, data->clk_frequency, pll_out); if (ret < 0) { dev_err(dev, "failed to start FLL: %d\n", ret); return ret; } ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_FLL, pll_out, SND_SOC_CLOCK_IN); if (ret < 0) { 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) { ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK, data->clk_frequency, SND_SOC_CLOCK_IN); if (ret < 0) { dev_err(dev, "failed to switch away from FLL: %d\n", ret); return ret; } ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL, 0, 0, 0); if (ret < 0) { dev_err(dev, "failed to stop FLL: %d\n", ret); return ret; } } break; default: break; } return 0; } static int imx_wm8962_late_probe(struct snd_soc_card *card) { struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai; struct imx_priv *priv = &card_priv; struct imx_wm8962_data *data = platform_get_drvdata(priv->pdev); struct device *dev = &priv->pdev->dev; int ret; ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK, data->clk_frequency, SND_SOC_CLOCK_IN); if (ret < 0) dev_err(dev, "failed to set sysclk in %s\n", __func__); return ret; } static int imx_wm8962_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *ssi_np, *codec_np; struct platform_device *ssi_pdev; struct imx_priv *priv = &card_priv; struct i2c_client *codec_dev; struct imx_wm8962_data *data; int int_port, ext_port; int ret; priv->pdev = pdev; ret = of_property_read_u32(np, "mux-int-port", &int_port); if (ret) { dev_err(&pdev->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(&pdev->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--; ret = imx_audmux_v2_configure_port(int_port, IMX_AUDMUX_V2_PTCR_SYN | IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) | IMX_AUDMUX_V2_PTCR_TCSEL(ext_port) | IMX_AUDMUX_V2_PTCR_TFSDIR | IMX_AUDMUX_V2_PTCR_TCLKDIR, IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)); if (ret) { dev_err(&pdev->dev, "audmux internal port setup failed\n"); return ret; } imx_audmux_v2_configure_port(ext_port, IMX_AUDMUX_V2_PTCR_SYN, IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)); if (ret) { dev_err(&pdev->dev, "audmux external port setup failed\n"); return ret; } ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0); codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0); if (!ssi_np || !codec_np) { dev_err(&pdev->dev, "phandle missing or invalid\n"); ret = -EINVAL; goto fail; } ssi_pdev = of_find_device_by_node(ssi_np); if (!ssi_pdev) { dev_err(&pdev->dev, "failed to find SSI platform device\n"); ret = -EINVAL; goto fail; } codec_dev = of_find_i2c_device_by_node(codec_np); if (!codec_dev || !codec_dev->dev.driver) { dev_err(&pdev->dev, "failed to find codec platform device\n"); ret = -EINVAL; goto fail; } data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) { ret = -ENOMEM; goto fail; } data->codec_clk = devm_clk_get(&codec_dev->dev, NULL); if (IS_ERR(data->codec_clk)) { ret = PTR_ERR(data->codec_clk); dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret); goto fail; } data->clk_frequency = clk_get_rate(data->codec_clk); ret = clk_prepare_enable(data->codec_clk); if (ret) { dev_err(&codec_dev->dev, "failed to enable codec clk: %d\n", ret); goto fail; } data->dai.name = "HiFi"; data->dai.stream_name = "HiFi"; data->dai.codec_dai_name = "wm8962"; data->dai.codec_of_node = codec_np; data->dai.cpu_dai_name = dev_name(&ssi_pdev->dev); data->dai.platform_of_node = ssi_np; data->dai.ops = &imx_hifi_ops; data->dai.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM; data->card.dev = &pdev->dev; ret = snd_soc_of_parse_card_name(&data->card, "model"); if (ret) goto clk_fail; ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing"); if (ret) goto clk_fail; data->card.num_links = 1; data->card.dai_link = &data->dai; data->card.dapm_widgets = imx_wm8962_dapm_widgets; data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8962_dapm_widgets); data->card.late_probe = imx_wm8962_late_probe; data->card.set_bias_level = imx_wm8962_set_bias_level; 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 clk_fail; } platform_set_drvdata(pdev, data); of_node_put(ssi_np); of_node_put(codec_np); return 0; clk_fail: clk_disable_unprepare(data->codec_clk); fail: if (ssi_np) of_node_put(ssi_np); if (codec_np) of_node_put(codec_np); return ret; } static int imx_wm8962_remove(struct platform_device *pdev) { struct imx_wm8962_data *data = platform_get_drvdata(pdev); if (!IS_ERR(data->codec_clk)) clk_disable_unprepare(data->codec_clk); return 0; } static const struct of_device_id imx_wm8962_dt_ids[] = { { .compatible = "fsl,imx-audio-wm8962", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, imx_wm8962_dt_ids); static struct platform_driver imx_wm8962_driver = { .driver = { .name = "imx-wm8962", .owner = THIS_MODULE, .pm = &snd_soc_pm_ops, .of_match_table = imx_wm8962_dt_ids, }, .probe = imx_wm8962_probe, .remove = imx_wm8962_remove, }; module_platform_driver(imx_wm8962_driver); MODULE_AUTHOR("Freescale Semiconductor, Inc."); MODULE_DESCRIPTION("Freescale i.MX WM8962 ASoC machine driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:imx-wm8962");