Add a soundcard driver for FSD audio interface to bridge the CPU DAI of samsung I2S with the codec and platform driver.
Signed-off-by: Padmanabhan Rajanbabu p.rajanbabu@samsung.com --- sound/soc/samsung/Kconfig | 12 ++ sound/soc/samsung/Makefile | 2 + sound/soc/samsung/fsd-card.c | 349 +++++++++++++++++++++++++++++++++++ 3 files changed, 363 insertions(+) create mode 100644 sound/soc/samsung/fsd-card.c
diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig index 2a61e620cd3b..344503522bd3 100644 --- a/sound/soc/samsung/Kconfig +++ b/sound/soc/samsung/Kconfig @@ -239,4 +239,16 @@ config SND_SOC_SAMSUNG_MIDAS_WM1811 help Say Y if you want to add support for SoC audio on the Midas boards.
+config SND_SOC_TESLA_FSD + tristate "SoC I2S Audio support for Tesla FSD board" + depends on SND_SOC_SAMSUNG + select SND_SIMPLE_CARD_UTILS + select SND_SAMSUNG_I2S + help + Say Y if you want to add support for SOC audio on the FSD board. + This will select the SND_SIMPLE_CARD_UTILS to use the dummy + codec driver, incase the codec node is not specified in the device + tree. This sound card driver uses Samsung I2S controller as CPU + and platform DAI. + endif #SND_SOC_SAMSUNG diff --git a/sound/soc/samsung/Makefile b/sound/soc/samsung/Makefile index 398e843f388c..0dad88fdb1a8 100644 --- a/sound/soc/samsung/Makefile +++ b/sound/soc/samsung/Makefile @@ -43,6 +43,7 @@ snd-soc-arndale-objs := arndale.o snd-soc-tm2-wm5110-objs := tm2_wm5110.o snd-soc-aries-wm8994-objs := aries_wm8994.o snd-soc-midas-wm1811-objs := midas_wm1811.o +snd-soc-fsd-objs := fsd-card.o
obj-$(CONFIG_SND_SOC_SAMSUNG_JIVE_WM8750) += snd-soc-jive-wm8750.o obj-$(CONFIG_SND_SOC_SAMSUNG_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o @@ -68,3 +69,4 @@ obj-$(CONFIG_SND_SOC_ARNDALE) += snd-soc-arndale.o obj-$(CONFIG_SND_SOC_SAMSUNG_TM2_WM5110) += snd-soc-tm2-wm5110.o obj-$(CONFIG_SND_SOC_SAMSUNG_ARIES_WM8994) += snd-soc-aries-wm8994.o obj-$(CONFIG_SND_SOC_SAMSUNG_MIDAS_WM1811) += snd-soc-midas-wm1811.o +obj-$(CONFIG_SND_SOC_TESLA_FSD) += snd-soc-fsd.o diff --git a/sound/soc/samsung/fsd-card.c b/sound/soc/samsung/fsd-card.c new file mode 100644 index 000000000000..806a4d3b99fd --- /dev/null +++ b/sound/soc/samsung/fsd-card.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ALSA SoC Audio Layer - FSD Soundcard driver + * + * Copyright (c) 2022 Samsung Electronics Co. Ltd. + * Padmanabhan Rajanbabu p.rajanbabu@samsung.com + */ + + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> + +#include <sound/initval.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <sound/simple_card_utils.h> + +#include "i2s.h" +#include "i2s-regs.h" + +#define FSD_PREFIX "tesla," +#define FSD_DAI_SRC_PCLK 3 +#define FSD_DAI_RFS_192 192 +#define FSD_DAI_BFS_48 48 +#define FSD_DAI_BFS_96 96 +#define FSD_DAI_BFS_192 192 + +struct fsd_card_priv { + struct snd_soc_card card; + struct snd_soc_dai_link *dai_link; + u32 tdm_slots; + u32 tdm_slot_width; +}; + +static unsigned int fsd_card_get_rfs(unsigned int rate) +{ + return FSD_DAI_RFS_192; +} + +static unsigned int fsd_card_get_bfs(unsigned int channels) +{ + switch (channels) { + case 1: + case 2: + return FSD_DAI_BFS_48; + case 3: + case 4: + return FSD_DAI_BFS_96; + case 5: + case 6: + case 7: + case 8: + return FSD_DAI_BFS_192; + default: + return FSD_DAI_BFS_48; + } +} + +static unsigned int fsd_card_get_psr(unsigned int rate) +{ + switch (rate) { + case 8000: return 43; + case 11025: return 31; + case 16000: return 21; + case 22050: return 16; + case 32000: return 11; + case 44100: return 8; + case 48000: return 7; + case 64000: return 5; + case 88200: return 4; + case 96000: return 4; + case 192000: return 2; + default: return 1; + } +} + +static int fsd_card_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_card *card = rtd->card; + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); + struct snd_soc_dai_link *link = rtd->dai_link; + struct fsd_card_priv *priv = snd_soc_card_get_drvdata(card); + unsigned int rfs, bfs, psr; + int ret = 0, cdclk_dir; + + rfs = fsd_card_get_rfs(params_rate(params)); + bfs = fsd_card_get_bfs(params_channels(params)); + psr = fsd_card_get_psr(params_rate(params)); + + /* Configure the Root Clock Source */ + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, + false, FSD_DAI_SRC_PCLK); + if (ret < 0) { + dev_err(card->dev, "Failed to set OPCLK: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0, + false, false); + if (ret < 0) { + dev_err(card->dev, "Failed to set RCLKSRC: %d\n", ret); + goto err; + } + + /* Set CPU DAI configuration */ + ret = snd_soc_dai_set_fmt(cpu_dai, link->dai_fmt); + if (ret < 0) { + dev_err(card->dev, "Failed to set DAIFMT: %d\n", ret); + goto err; + } + + if (link->dai_fmt & SND_SOC_DAIFMT_CBC_CFC) { + cdclk_dir = SND_SOC_CLOCK_OUT; + } else if (link->dai_fmt & SND_SOC_DAIFMT_CBP_CFP) { + cdclk_dir = SND_SOC_CLOCK_IN; + } else { + dev_err(card->dev, "Missing Clock Master information\n"); + goto err; + } + + /* Set Clock Source for CDCLK */ + ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK, + rfs, cdclk_dir); + if (ret < 0) { + dev_err(card->dev, "Failed to set CDCLK: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_RCLK, psr); + if (ret < 0) { + dev_err(card->dev, "Failed to set PSR: %d\n", ret); + goto err; + } + + ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs); + if (ret < 0) { + dev_err(card->dev, "Failed to set BCLK: %d\n", ret); + goto err; + } + + if (priv->tdm_slots) { + ret = snd_soc_dai_set_tdm_slot(cpu_dai, false, false, + priv->tdm_slots, priv->tdm_slot_width); + if (ret < 0) { + dev_err(card->dev, + "Failed to configure in TDM mode:%d\n", ret); + goto err; + } + } + +err: + return ret; +} + +static const struct snd_soc_ops fsd_card_ops = { + .hw_params = fsd_card_hw_params, +}; + +static struct fsd_card_priv *fsd_card_parse_of(struct snd_soc_card *card) +{ + struct fsd_card_priv *priv; + struct snd_soc_dai_link *link; + struct device *dev = card->dev; + struct device_node *node = dev->of_node; + struct device_node *np, *cpu_node, *codec_node; + struct snd_soc_dai_link_component *dlc; + int ret, id = 0, num_links; + + ret = snd_soc_of_parse_card_name(card, "model"); + if (ret) { + dev_err(dev, "Error parsing card name: %d\n", ret); + return ERR_PTR(ret); + } + + if (of_property_read_bool(dev->of_node, "widgets")) { + ret = snd_soc_of_parse_audio_simple_widgets(card, "widgets"); + if (ret) + return ERR_PTR(ret); + } + + /* Add DAPM routes to the card */ + if (of_property_read_bool(node, "audio-routing")) { + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); + if (ret) + return ERR_PTR(ret); + } + + num_links = of_get_child_count(node); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return ERR_PTR(-ENOMEM); + + priv->dai_link = devm_kzalloc(dev, num_links * sizeof(*priv->dai_link), + GFP_KERNEL); + if (!priv->dai_link) + return ERR_PTR(-ENOMEM); + + priv->tdm_slots = 0; + priv->tdm_slot_width = 0; + + snd_soc_of_parse_tdm_slot(node, NULL, NULL, &priv->tdm_slots, + &priv->tdm_slot_width); + + link = priv->dai_link; + + for_each_child_of_node(node, np) { + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); + if (!dlc) + return ERR_PTR(-ENOMEM); + + link->id = id; + link->cpus = &dlc[0]; + link->platforms = &dlc[1]; + link->num_cpus = 1; + link->num_codecs = 1; + link->num_platforms = 1; + + cpu_node = of_get_child_by_name(np, "cpu"); + if (!cpu_node) { + dev_err(dev, "Missing CPU/Codec node\n"); + ret = -EINVAL; + goto err_cpu_node; + } + + ret = snd_soc_of_get_dai_link_cpus(dev, cpu_node, link); + if (ret < 0) { + dev_err(dev, "Error Parsing CPU DAI name\n"); + goto err_cpu_name; + } + + link->platforms->of_node = link->cpus->of_node; + + codec_node = of_get_child_by_name(np, "codec"); + if (codec_node) { + ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, + link); + if (ret < 0) { + dev_err(dev, "Error Parsing Codec DAI name\n"); + goto err_codec_name; + } + } else { + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); + if (!dlc) { + ret = -ENOMEM; + goto err_cpu_name; + } + + link->codecs = dlc; + + link->codecs->dai_name = "snd-soc-dummy-dai"; + link->codecs->name = "snd-soc-dummy"; + link->dynamic = 1; + + snd_soc_dai_link_set_capabilities(link); + link->ignore_suspend = 1; + link->nonatomic = 1; + } + + ret = asoc_simple_parse_daifmt(dev, np, codec_node, + FSD_PREFIX, &link->dai_fmt); + if (ret) + link->dai_fmt = SND_SOC_DAIFMT_NB_NF | + SND_SOC_DAIFMT_CBC_CFC | + SND_SOC_DAIFMT_I2S; + + ret = of_property_read_string(np, "link-name", &link->name); + if (ret) { + dev_err(card->dev, "Error Parsing link name\n"); + goto err_codec_name; + } + + link->stream_name = link->name; + link->ops = &fsd_card_ops; + + link++; + id++; + + of_node_put(cpu_node); + of_node_put(codec_node); + } + + card->dai_link = priv->dai_link; + card->num_links = num_links; + + return priv; + +err_codec_name: + of_node_put(codec_node); +err_cpu_name: + of_node_put(cpu_node); +err_cpu_node: + of_node_put(np); + return ERR_PTR(ret); +} + +static int fsd_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct snd_soc_card *card; + struct fsd_card_priv *fsd_priv; + + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); + if (!card) + return -ENOMEM; + + card->dev = dev; + fsd_priv = fsd_card_parse_of(card); + + if (IS_ERR(fsd_priv)) { + dev_err(&pdev->dev, "Error Parsing DAI Link: %ld\n", + PTR_ERR(fsd_priv)); + return PTR_ERR(fsd_priv); + } + + snd_soc_card_set_drvdata(card, fsd_priv); + + return devm_snd_soc_register_card(&pdev->dev, card); +} + +static const struct of_device_id fsd_device_id[] = { + { .compatible = "tesla,fsd-card" }, + {}, +}; +MODULE_DEVICE_TABLE(of, fsd_device_id); + +static struct platform_driver fsd_platform_driver = { + .driver = { + .name = "fsd-card", + .of_match_table = of_match_ptr(fsd_device_id), + }, + .probe = fsd_platform_probe, +}; +module_platform_driver(fsd_platform_driver); + +MODULE_AUTHOR("Padmanabhan Rajanbabu p.rajanbabu@samsung.com"); +MODULE_DESCRIPTION("FSD ASoC Soundcard Driver"); +MODULE_LICENSE("GPL");