diff options
Diffstat (limited to 'sound/soc/rockchip/rockchip_multicodecs.c')
| -rw-r--r-- | sound/soc/rockchip/rockchip_multicodecs.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/sound/soc/rockchip/rockchip_multicodecs.c b/sound/soc/rockchip/rockchip_multicodecs.c new file mode 100644 index 000000000000..f57daa415267 --- /dev/null +++ b/sound/soc/rockchip/rockchip_multicodecs.c @@ -0,0 +1,191 @@ +/* + * Rockchip machine ASoC driver for Rockchip Multi-codecs audio + * + * Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd + * + * Authors: Sugar Zhang <sugar.zhang@rock-chips.com>, + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#define DRV_NAME "rk-multicodecs" +#define MAX_CODECS 2 + +static int rk_multicodecs_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + int ret = 0; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + int mclk; + + switch (params_rate(params)) { + case 8000: + case 16000: + case 24000: + case 32000: + case 48000: + case 64000: + case 96000: + mclk = 12288000; + break; + case 11025: + case 22050: + case 44100: + case 88200: + mclk = 11289600; + break; + case 176400: + mclk = 11289600 * 2; + break; + case 192000: + mclk = 12288000 * 2; + break; + default: + return -EINVAL; + } + + ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk, + SND_SOC_CLOCK_OUT); + + if (ret && ret != -ENOTSUPP) { + dev_err(cpu_dai->dev, "Can't set cpu clock %d\n", ret); + return ret; + } + + return 0; +} + +static struct snd_soc_ops rk_ops = { + .hw_params = rk_multicodecs_hw_params, +}; + +static struct snd_soc_dai_link rk_dailink = { + .name = "MULTICODECS", + .stream_name = "MULTICODECS", + .ops = &rk_ops, + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBS_CFS, +}; + +static struct snd_soc_card snd_soc_card_rk = { + .name = "rk-multicodecs-sound", + .dai_link = &rk_dailink, + .num_links = 1, + .num_aux_devs = 0, +}; + +static int rk_multicodecs_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_soc_card_rk; + struct device_node *np = pdev->dev.of_node; + struct snd_soc_dai_link *link = card->dai_link; + struct snd_soc_dai_link_component *codecs; + struct of_phandle_args args; + struct device_node *node; + int count; + int ret = 0, i = 0, idx = 0; + + card->dev = &pdev->dev; + + count = of_count_phandle_with_args(np, "rockchip,codec", NULL); + if (count < 0 || count > MAX_CODECS) + return -EINVAL; + + /* refine codecs, remove unavailable node */ + for (i = 0; i < count; i++) { + node = of_parse_phandle(np, "rockchip,codec", i); + if (!node) + return -ENODEV; + if (of_device_is_available(node)) + idx++; + } + + if (!idx) + return -ENODEV; + + codecs = devm_kcalloc(&pdev->dev, idx, + sizeof(*codecs), GFP_KERNEL); + link->codecs = codecs; + link->num_codecs = idx; + idx = 0; + for (i = 0; i < count; i++) { + node = of_parse_phandle(np, "rockchip,codec", i); + if (!node) + return -ENODEV; + if (!of_device_is_available(node)) + continue; + + ret = of_parse_phandle_with_fixed_args(np, "rockchip,codec", + 0, i, &args); + if (ret) + return ret; + + codecs[idx].of_node = node; + ret = snd_soc_get_dai_name(&args, &codecs[idx].dai_name); + if (ret) + return ret; + idx++; + } + + link->cpu_of_node = of_parse_phandle(np, "rockchip,cpu", 0); + if (!link->cpu_of_node) + return -ENODEV; + + link->platform_of_node = link->cpu_of_node; + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (ret) { + dev_err(&pdev->dev, "card register failed %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, card); + + return ret; +} + +static const struct of_device_id rockchip_multicodecs_of_match[] = { + { .compatible = "rockchip,multicodecs-card", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, rockchip_multicodecs_of_match); + +static struct platform_driver rockchip_multicodecs_driver = { + .probe = rk_multicodecs_probe, + .driver = { + .name = DRV_NAME, + .pm = &snd_soc_pm_ops, + .of_match_table = rockchip_multicodecs_of_match, + }, +}; + +module_platform_driver(rockchip_multicodecs_driver); + +MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>"); +MODULE_DESCRIPTION("Rockchip General Multicodecs ASoC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRV_NAME); |