The Lantiq PEF2256 is a framer and line interface component designed to fulfill all required interfacing between an analog E1/T1/J1 line and the digital PCM system highway/H.100 bus.
The codec support allows to use some of the PCM system highway time-slots as audio channels to transport audio data over the E1/T1/J1 lines. It provides also line carrier detection events reported through the ALSA jack detection feature.
Signed-off-by: Herve Codina herve.codina@bootlin.com --- sound/soc/codecs/Kconfig | 14 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/pef2256-codec.c | 390 +++++++++++++++++++++++++++++++ 3 files changed, 406 insertions(+) create mode 100644 sound/soc/codecs/pef2256-codec.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 0be061953e9a..4f78da914fc7 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -168,6 +168,7 @@ config SND_SOC_ALL_CODECS imply SND_SOC_PCM512x_I2C imply SND_SOC_PCM512x_SPI imply SND_SOC_PEB2466 + imply SND_SOC_PEF2256 imply SND_SOC_RK3328 imply SND_SOC_RK817 imply SND_SOC_RT274 @@ -1252,6 +1253,19 @@ config SND_SOC_PEB2466 To compile this driver as a module, choose M here: the module will be called snd-soc-peb2466.
+config SND_SOC_PEF2256 + tristate "Lantiq PEF2256 codec" + depends on MFD_PEF2256 + help + Enable support for the Lantiq PEF2256 (FALC56) codec. + The PEF2256 is a framer and line interface between analog E1/T1/J1 + line and a digital PCM bus. + This codec allows to use some of the time slots available on the + PEF2256 PCM bus to transport some audio data. + + To compile this driver as a module, choose M here: the module + will be called snd-soc-pef2256. + config SND_SOC_RK3328 tristate "Rockchip RK3328 audio CODEC" select REGMAP_MMIO diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 20b388b77f1f..11bd66d46f7b 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -188,6 +188,7 @@ snd-soc-pcm512x-objs := pcm512x.o snd-soc-pcm512x-i2c-objs := pcm512x-i2c.o snd-soc-pcm512x-spi-objs := pcm512x-spi.o snd-soc-peb2466-objs := peb2466.o +snd-soc-pef2256-objs := pef2256-codec.o snd-soc-rk3328-objs := rk3328_codec.o snd-soc-rk817-objs := rk817_codec.o snd-soc-rl6231-objs := rl6231.o @@ -551,6 +552,7 @@ obj-$(CONFIG_SND_SOC_PCM512x) += snd-soc-pcm512x.o obj-$(CONFIG_SND_SOC_PCM512x_I2C) += snd-soc-pcm512x-i2c.o obj-$(CONFIG_SND_SOC_PCM512x_SPI) += snd-soc-pcm512x-spi.o obj-$(CONFIG_SND_SOC_PEB2466) += snd-soc-peb2466.o +obj-$(CONFIG_SND_SOC_PEF2256) += snd-soc-pef2256.o obj-$(CONFIG_SND_SOC_RK3328) += snd-soc-rk3328.o obj-$(CONFIG_SND_SOC_RK817) += snd-soc-rk817.o obj-$(CONFIG_SND_SOC_RL6231) += snd-soc-rl6231.o diff --git a/sound/soc/codecs/pef2256-codec.c b/sound/soc/codecs/pef2256-codec.c new file mode 100644 index 000000000000..d87fdc771a30 --- /dev/null +++ b/sound/soc/codecs/pef2256-codec.c @@ -0,0 +1,390 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// pef2256.c -- Lantiq PEF2256 ALSA SoC driver +// +// Copyright 2023 CS GROUP France +// +// Author: Herve Codina herve.codina@bootlin.com + +#include <linux/clk.h> +#include <linux/mfd/pef2256.h> +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <sound/jack.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/tlv.h> + +#define PEF2256_NB_CHANNEL 32 +#define PEF2256_JACK_MASK (SND_JACK_LINEIN | SND_JACK_LINEOUT) + +struct pef2256_codec { + struct pef2256 *pef2256; + struct device *dev; + struct snd_soc_jack jack; + struct notifier_block nb; + struct work_struct carrier_work; + int max_chan_playback; + int max_chan_capture; +}; + +static int pef2256_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int width) +{ + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + + switch (width) { + case 0: + /* Not set -> default 8 */ + case 8: + break; + default: + dev_err(dai->dev, "tdm slot width %d not supported\n", width); + return -EINVAL; + } + + pef2256->max_chan_playback = hweight32(tx_mask); + if (pef2256->max_chan_playback > PEF2256_NB_CHANNEL) { + dev_err(dai->dev, "too much tx slots defined (mask = 0x%x) support max %d\n", + tx_mask, PEF2256_NB_CHANNEL); + return -EINVAL; + } + + pef2256->max_chan_capture = hweight32(rx_mask); + if (pef2256->max_chan_capture > PEF2256_NB_CHANNEL) { + dev_err(dai->dev, "too much rx slots defined (mask = 0x%x) support max %d\n", + rx_mask, PEF2256_NB_CHANNEL); + return -EINVAL; + } + + return 0; +} + +/* + * The constraints for format/channel is to match with the number of 8bit + * time-slots available. + */ +static int pef2256_dai_hw_rule_channels_by_format(struct snd_soc_dai *dai, + struct snd_pcm_hw_params *params, + unsigned int nb_ts) +{ + struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); + snd_pcm_format_t format = params_format(params); + struct snd_interval ch = {0}; + + switch (snd_pcm_format_physical_width(format)) { + case 8: + ch.max = nb_ts; + break; + case 16: + ch.max = nb_ts/2; + break; + case 32: + ch.max = nb_ts/4; + break; + case 64: + ch.max = nb_ts/8; + break; + default: + dev_err(dai->dev, "format physical width %u not supported\n", + snd_pcm_format_physical_width(format)); + return -EINVAL; + } + + ch.min = ch.max ? 1 : 0; + + return snd_interval_refine(c, &ch); +} + +static int pef2256_dai_hw_rule_playback_channels_by_format(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct snd_soc_dai *dai = rule->private; + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + + return pef2256_dai_hw_rule_channels_by_format(dai, params, pef2256->max_chan_playback); +} + +static int pef2256_dai_hw_rule_capture_channels_by_format(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct snd_soc_dai *dai = rule->private; + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + + return pef2256_dai_hw_rule_channels_by_format(dai, params, pef2256->max_chan_capture); +} + +static int pef2256_dai_hw_rule_format_by_channels(struct snd_soc_dai *dai, + struct snd_pcm_hw_params *params, + unsigned int nb_ts) +{ + struct snd_mask *f_old = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); + unsigned int channels = params_channels(params); + unsigned int slot_width; + struct snd_mask f_new; + unsigned int i; + + if (!channels || channels > nb_ts) { + dev_err(dai->dev, "channels %u not supported\n", nb_ts); + return -EINVAL; + } + + slot_width = (nb_ts / channels) * 8; + + snd_mask_none(&f_new); + for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { + if (snd_mask_test(f_old, i)) { + if (snd_pcm_format_physical_width(i) <= slot_width) + snd_mask_set(&f_new, i); + } + } + + return snd_mask_refine(f_old, &f_new); +} + +static int pef2256_dai_hw_rule_playback_format_by_channels(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct snd_soc_dai *dai = rule->private; + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + + return pef2256_dai_hw_rule_format_by_channels(dai, params, pef2256->max_chan_playback); +} + +static int pef2256_dai_hw_rule_capture_format_by_channels(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + struct snd_soc_dai *dai = rule->private; + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + + return pef2256_dai_hw_rule_format_by_channels(dai, params, pef2256->max_chan_capture); +} + +static u64 pef2256_formats(u8 nb_ts) +{ + u64 formats; + unsigned int chan_width; + unsigned int format_width; + int i; + + if (!nb_ts) + return 0; + + formats = 0; + chan_width = nb_ts * 8; + for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) { + /* Support physical width multiple of 8bit */ + format_width = snd_pcm_format_physical_width(i); + if (format_width == 0 || format_width % 8) + continue; + + /* + * And support physical width that can fit N times in the + * channel + */ + if (format_width > chan_width || chan_width % format_width) + continue; + + formats |= (1ULL << i); + } + return formats; +} + +static int pef2256_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(dai->component); + snd_pcm_hw_rule_func_t hw_rule_channels_by_format; + snd_pcm_hw_rule_func_t hw_rule_format_by_channels; + unsigned int frame_bits; + u64 format; + int ret; + + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + format = pef2256_formats(pef2256->max_chan_capture); + hw_rule_channels_by_format = pef2256_dai_hw_rule_capture_channels_by_format; + hw_rule_format_by_channels = pef2256_dai_hw_rule_capture_format_by_channels; + frame_bits = pef2256->max_chan_capture * 8; + } else { + format = pef2256_formats(pef2256->max_chan_playback); + hw_rule_channels_by_format = pef2256_dai_hw_rule_playback_channels_by_format; + hw_rule_format_by_channels = pef2256_dai_hw_rule_playback_format_by_channels; + frame_bits = pef2256->max_chan_playback * 8; + } + + ret = snd_pcm_hw_constraint_mask64(substream->runtime, + SNDRV_PCM_HW_PARAM_FORMAT, format); + if (ret) { + dev_err(dai->dev, "Failed to add format constraint (%d)\n", ret); + return ret; + } + + ret = snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, + hw_rule_channels_by_format, dai, + SNDRV_PCM_HW_PARAM_FORMAT, -1); + if (ret) { + dev_err(dai->dev, "Failed to add channels rule (%d)\n", ret); + return ret; + } + + ret = snd_pcm_hw_rule_add(substream->runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, + hw_rule_format_by_channels, dai, + SNDRV_PCM_HW_PARAM_CHANNELS, -1); + if (ret) { + dev_err(dai->dev, "Failed to add format rule (%d)\n", ret); + return ret; + } + + ret = snd_pcm_hw_constraint_single(substream->runtime, + SNDRV_PCM_HW_PARAM_FRAME_BITS, + frame_bits); + if (ret < 0) { + dev_err(dai->dev, "Failed to add frame_bits constraint (%d)\n", ret); + return ret; + } + + return 0; +} + +static u64 pef2256_dai_formats[] = { + SND_SOC_POSSIBLE_DAIFMT_DSP_B, +}; + +static const struct snd_soc_dai_ops pef2256_dai_ops = { + .startup = pef2256_dai_startup, + .set_tdm_slot = pef2256_dai_set_tdm_slot, + .auto_selectable_formats = pef2256_dai_formats, + .num_auto_selectable_formats = ARRAY_SIZE(pef2256_dai_formats), +}; + +static struct snd_soc_dai_driver pef2256_dai_driver = { + .name = "pef2256", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = PEF2256_NB_CHANNEL, + .rates = SNDRV_PCM_RATE_8000, + .formats = U64_MAX, /* Will be refined on DAI .startup() */ + }, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = PEF2256_NB_CHANNEL, + .rates = SNDRV_PCM_RATE_8000, + .formats = U64_MAX, /* Will be refined on DAI .startup() */ + }, + .ops = &pef2256_dai_ops, +}; + +static void pef2256_carrier_work(struct work_struct *work) +{ + struct pef2256_codec *pef2256 = container_of(work, struct pef2256_codec, carrier_work); + int status; + + status = pef2256_get_carrier(pef2256->pef2256) ? PEF2256_JACK_MASK : 0; + snd_soc_jack_report(&pef2256->jack, status, PEF2256_JACK_MASK); +} + +static int pef2256_carrier_notifier(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct pef2256_codec *pef2256 = container_of(nb, struct pef2256_codec, nb); + + switch (action) { + case PEF2256_EVENT_CARRIER: + queue_work(system_power_efficient_wq, &pef2256->carrier_work); + break; + default: + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static int pef2256_component_probe(struct snd_soc_component *component) +{ + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(component); + char *name; + int ret; + + INIT_WORK(&pef2256->carrier_work, pef2256_carrier_work); + + name = "carrier"; + if (component->name_prefix) { + name = kasprintf(GFP_KERNEL, "%s carrier", component->name_prefix); + if (!name) + return -ENOMEM; + } + + ret = snd_soc_card_jack_new(component->card, name, PEF2256_JACK_MASK, &pef2256->jack); + if (component->name_prefix) + kfree(name); /* A copy is done by snd_soc_card_jack_new */ + if (ret) { + dev_err(component->dev, "Cannot create jack\n"); + return ret; + } + + pef2256->nb.notifier_call = pef2256_carrier_notifier; + ret = pef2256_register_event_notifier(pef2256->pef2256, &pef2256->nb); + if (ret) { + dev_err(component->dev, "Cannot register event notifier\n"); + return ret; + } + + /* Queue work to set the initial value */ + queue_work(system_power_efficient_wq, &pef2256->carrier_work); + + return 0; +} + +static void pef2256_component_remove(struct snd_soc_component *component) +{ + struct pef2256_codec *pef2256 = snd_soc_component_get_drvdata(component); + + pef2256_unregister_event_notifier(pef2256->pef2256, &pef2256->nb); + cancel_work_sync(&pef2256->carrier_work); +} + +static const struct snd_soc_component_driver pef2256_component_driver = { + .probe = pef2256_component_probe, + .remove = pef2256_component_remove, + .endianness = 1, +}; + +static int pef2256_codec_probe(struct platform_device *pdev) +{ + struct pef2256_codec *pef2256; + + pef2256 = devm_kzalloc(&pdev->dev, sizeof(*pef2256), GFP_KERNEL); + if (!pef2256) + return -ENOMEM; + + pef2256->dev = &pdev->dev; + pef2256->pef2256 = dev_get_drvdata(pef2256->dev->parent); + + platform_set_drvdata(pdev, pef2256); + + return devm_snd_soc_register_component(&pdev->dev, &pef2256_component_driver, + &pef2256_dai_driver, 1); +} + +static const struct of_device_id pef2256_codec_of_match[] = { + { .compatible = "lantiq,pef2256-codec" }, + {} /* sentinel */ +}; +MODULE_DEVICE_TABLE(of, pef2256_codec_of_match); + +static struct platform_driver pef2256_codec_driver = { + .driver = { + .name = "lantiq-pef2256-codec", + .of_match_table = pef2256_codec_of_match, + }, + .probe = pef2256_codec_probe, +}; +module_platform_driver(pef2256_codec_driver); + +MODULE_AUTHOR("Herve Codina herve.codina@bootlin.com"); +MODULE_DESCRIPTION("PEF2256 ALSA SoC driver"); +MODULE_LICENSE("GPL");