| /* |
| * Copyright (C) 2015 Freescale Semiconductor, Inc. |
| * |
| * 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" |
| |
| #define SUPPORT_RATE_NUM 10 |
| |
| struct imx_sii902x_data { |
| struct snd_soc_dai_link dai; |
| struct snd_soc_card card; |
| struct i2c_client *sii902x; |
| bool is_stream_opened[2]; |
| }; |
| |
| static int imx_sii902x_startup(struct snd_pcm_substream *substream) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| static struct snd_pcm_hw_constraint_list constraint_rates; |
| static u32 support_rates[SUPPORT_RATE_NUM]; |
| 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 imx_sii902x_data *data = snd_soc_card_get_drvdata(card); |
| struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev); |
| bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| int ret; |
| |
| data->is_stream_opened[tx] = true; |
| if (data->is_stream_opened[tx] != sai->is_stream_opened[tx] || |
| data->is_stream_opened[!tx] != sai->is_stream_opened[!tx]) { |
| data->is_stream_opened[tx] = false; |
| return -EBUSY; |
| } |
| |
| support_rates[0] = 32000; |
| support_rates[1] = 48000; |
| support_rates[2] = 96000; |
| support_rates[3] = 192000; |
| constraint_rates.list = support_rates; |
| constraint_rates.count = 4; |
| |
| ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| &constraint_rates); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int imx_sii902x_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_sii902x_data *data = snd_soc_card_get_drvdata(card); |
| int ret; |
| unsigned char reg; |
| |
| /* set cpu DAI configuration */ |
| ret = snd_soc_dai_set_fmt(cpu_dai, |
| SND_SOC_DAIFMT_LEFT_J | |
| SND_SOC_DAIFMT_NB_NF | |
| SND_SOC_DAIFMT_CBS_CFS); |
| if (ret) { |
| dev_err(dev, "failed to set cpu dai fmt: %d\n", ret); |
| return ret; |
| } |
| |
| ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT); |
| if (ret) { |
| dev_err(dev, "failed to set cpu sysclk: %d\n", ret); |
| return ret; |
| } |
| |
| ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, 24); |
| if (ret) { |
| dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret); |
| return ret; |
| } |
| |
| /* sii90sx hdmi audio setup */ |
| i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x90); |
| i2c_smbus_write_byte_data(data->sii902x, 0x20, 0x2d); |
| i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0x88); |
| i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0x91); |
| i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0xa2); |
| i2c_smbus_write_byte_data(data->sii902x, 0x1f, 0xb3); |
| i2c_smbus_write_byte_data(data->sii902x, 0x27, 0); |
| switch (params_rate(params)) { |
| case 44100: |
| reg = 0; |
| break; |
| case 48000: |
| reg = 0x2; |
| break; |
| case 32000: |
| reg = 0x3; |
| break; |
| case 88200: |
| reg = 0x8; |
| break; |
| case 96000: |
| reg = 0xa; |
| break; |
| case 176400: |
| reg = 0xc; |
| break; |
| case 192000: |
| reg = 0xe; |
| break; |
| default: |
| reg = 0x1; |
| break; |
| } |
| i2c_smbus_write_byte_data(data->sii902x, 0x24, reg); |
| i2c_smbus_write_byte_data(data->sii902x, 0x25, 0x0b); |
| i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x80); |
| |
| return 0; |
| } |
| |
| static int imx_sii902x_hw_free(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_card *card = rtd->card; |
| struct imx_sii902x_data *data = snd_soc_card_get_drvdata(card); |
| |
| i2c_smbus_write_byte_data(data->sii902x, 0x26, 0x10); |
| |
| return 0; |
| } |
| |
| static void imx_sii902x_shutdown(struct snd_pcm_substream *substream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai *codec_dai = rtd->codec_dai; |
| struct snd_soc_card *card = codec_dai->codec->card; |
| struct imx_sii902x_data *data = snd_soc_card_get_drvdata(card); |
| bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
| |
| data->is_stream_opened[tx] = false; |
| } |
| |
| static struct snd_soc_ops imx_sii902x_ops = { |
| .startup = imx_sii902x_startup, |
| .shutdown = imx_sii902x_shutdown, |
| .hw_params = imx_sii902x_hw_params, |
| .hw_free = imx_sii902x_hw_free, |
| }; |
| |
| static int imx_sii902x_probe(struct platform_device *pdev) |
| { |
| struct device_node *cpu_np, *sii902x_np; |
| struct platform_device *cpu_pdev; |
| struct imx_sii902x_data *data; |
| int ret; |
| |
| 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; |
| } |
| |
| sii902x_np = of_parse_phandle(pdev->dev.of_node, "hdmi-controler", 0); |
| if (!sii902x_np) { |
| dev_err(&pdev->dev, "sii902x 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; |
| } |
| |
| data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); |
| if (!data) { |
| ret = -ENOMEM; |
| goto fail; |
| } |
| |
| data->sii902x = of_find_i2c_device_by_node(sii902x_np); |
| if (!data->sii902x) { |
| dev_err(&pdev->dev, "failed to find sii902x i2c client\n"); |
| ret = -EPROBE_DEFER; |
| goto fail; |
| } |
| |
| data->dai.name = "sii902x hdmi"; |
| data->dai.stream_name = "sii902x hdmi"; |
| data->dai.codec_dai_name = "snd-soc-dummy-dai"; |
| data->dai.codec_name = "snd-soc-dummy"; |
| data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev); |
| data->dai.platform_of_node = cpu_np; |
| data->dai.ops = &imx_sii902x_ops; |
| data->dai.playback_only = true; |
| data->dai.capture_only = false; |
| data->dai.dai_fmt = SND_SOC_DAIFMT_LEFT_J | |
| SND_SOC_DAIFMT_NB_NF | |
| SND_SOC_DAIFMT_CBS_CFS; |
| |
| data->card.dev = &pdev->dev; |
| ret = snd_soc_of_parse_card_name(&data->card, "model"); |
| if (ret) |
| goto fail; |
| data->card.num_links = 1; |
| data->card.dai_link = &data->dai; |
| |
| 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 (sii902x_np) |
| of_node_put(sii902x_np); |
| return ret; |
| } |
| |
| static const struct of_device_id imx_sii902x_dt_ids[] = { |
| { .compatible = "fsl,imx-audio-sii902x", }, |
| { /* sentinel */ } |
| }; |
| MODULE_DEVICE_TABLE(of, imx_sii902x_dt_ids); |
| |
| static struct platform_driver imx_sii902x_driver = { |
| .driver = { |
| .name = "imx-sii902x", |
| .owner = THIS_MODULE, |
| .pm = &snd_soc_pm_ops, |
| .of_match_table = imx_sii902x_dt_ids, |
| }, |
| .probe = imx_sii902x_probe, |
| }; |
| module_platform_driver(imx_sii902x_driver); |
| |
| MODULE_AUTHOR("Freescale Semiconductor, Inc."); |
| MODULE_DESCRIPTION("Freescale i.MX SII902X hdmi audio ASoC machine driver"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("platform:imx-sii902x"); |