| /* |
| * Copyright 2012, 2014 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/clk.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_i2c.h> |
| #include <sound/soc.h> |
| |
| #define SUPPORT_RATE_NUM 10 |
| |
| struct imx_priv { |
| unsigned int mclk_freq; |
| struct platform_device *pdev; |
| }; |
| |
| static struct imx_priv card_priv; |
| |
| static int imx_mqs_startup(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| static struct snd_pcm_hw_constraint_list constraint_rates; |
| struct imx_priv *priv = &card_priv; |
| struct device *dev = &priv->pdev->dev; |
| static u32 support_rates[SUPPORT_RATE_NUM]; |
| int ret; |
| |
| if (priv->mclk_freq == 24576000) { |
| support_rates[0] = 48000; |
| support_rates[1] = 96000; |
| support_rates[2] = 192000; |
| constraint_rates.list = support_rates; |
| constraint_rates.count = 3; |
| |
| ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| &constraint_rates); |
| if (ret) |
| return ret; |
| } else |
| dev_warn(dev, "mclk may be not supported %d\n", priv->mclk_freq); |
| |
| return 0; |
| } |
| |
| static struct snd_soc_ops imx_mqs_ops = { |
| .startup = imx_mqs_startup, |
| }; |
| |
| |
| |
| static struct snd_soc_dai_link imx_mqs_dai = { |
| .name = "HiFi", |
| .stream_name = "HiFi", |
| .dai_fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF | |
| SND_SOC_DAIFMT_CBS_CFS, |
| .ops = &imx_mqs_ops, |
| }; |
| |
| static struct snd_soc_card snd_soc_card_imx_mqs = { |
| .name = "mqs-audio", |
| .dai_link = &imx_mqs_dai, |
| .owner = THIS_MODULE, |
| .num_links = 1, |
| }; |
| |
| static int imx_mqs_probe(struct platform_device *pdev) |
| { |
| struct device_node *cpu_np, *codec_np; |
| struct imx_priv *priv = &card_priv; |
| struct clk *codec_clk = NULL; |
| struct platform_device *codec_dev; |
| int ret; |
| |
| priv->pdev = pdev; |
| |
| cpu_np = of_parse_phandle(pdev->dev.of_node, "cpu-dai", 0); |
| if (!cpu_np) { |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| codec_np = of_parse_phandle(pdev->dev.of_node, "audio-codec", 0); |
| if (!codec_np) { |
| dev_err(&pdev->dev, "phandle missing or invalid\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| codec_dev = of_find_device_by_node(codec_np); |
| if (!codec_dev) { |
| dev_err(&codec_dev->dev, "failed to find codec device\n"); |
| ret = -EINVAL; |
| goto fail; |
| } |
| |
| codec_clk = devm_clk_get(&codec_dev->dev, NULL); |
| if (IS_ERR(codec_clk)) { |
| ret = PTR_ERR(codec_clk); |
| dev_err(&codec_dev->dev, "failed to get codec clk: %d\n", ret); |
| goto fail; |
| } |
| priv->mclk_freq = clk_get_rate(codec_clk); |
| |
| |
| imx_mqs_dai.cpu_of_node = cpu_np; |
| imx_mqs_dai.platform_of_node = cpu_np; |
| imx_mqs_dai.codec_dai_name = "fsl-mqs-dai"; |
| imx_mqs_dai.codec_of_node = codec_np; |
| snd_soc_card_imx_mqs.dev = &pdev->dev; |
| |
| ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_imx_mqs); |
| 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); |
| |
| return ret; |
| } |
| |
| static const struct of_device_id imx_mqs_dt_ids[] = { |
| { .compatible = "fsl,imx-audio-mqs", }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, imx_mqs_dt_ids); |
| |
| static struct platform_driver imx_mqs_driver = { |
| .driver = { |
| .name = "imx-mqs", |
| .owner = THIS_MODULE, |
| .of_match_table = imx_mqs_dt_ids, |
| }, |
| .probe = imx_mqs_probe, |
| }; |
| module_platform_driver(imx_mqs_driver); |
| |
| MODULE_AUTHOR("Nicolin Chen <Guangyu.Chen@freescale.com>"); |
| MODULE_DESCRIPTION("Freescale i.MX MQS ASoC machine driver"); |
| MODULE_ALIAS("platform:imx-mqs"); |
| MODULE_LICENSE("GPL v2"); |