From patchwork Fri Sep 22 07:59:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13395215 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3A451A73F; Fri, 22 Sep 2023 08:01:44 +0000 (UTC) Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D0681BE8; Fri, 22 Sep 2023 01:01:20 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPA id 598071BF221; Fri, 22 Sep 2023 08:01:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695369679; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KOAaCmXgogbkZAhhVA9SMwgqkQqGL+jvAYVg1rGQZRM=; b=Z1C8OBw60Ed7tKH46hKWM0tq6WXq+qEq0GbvGGi9mp2UUxdGxzX4yYTLjQK/Adjo7x2nEt W2hAi4hTNukTxibroR27S73WtO/bhKGD5NQbQUbtgBMWtIVbszdeEHl/NuBlJqKMGCVsz6 BTtc+P+N2Q6KoDP2CSxsnwvp04D6Tp3tdXE4w9EuGD7Tm4OJgm4zJEP37h+FtG0Kczex8o tmyW3JAJEq8c4rNOx3DtrfWV6RpMmbn9KFSUOql3/3tJ6ZLykSZ7biV/13v+yT7RV3StN/ et+baBVtrypPKSX6i46j68qHJUDcHWNibESIlcN5sITDBQjRma1yYChL/pFGsw== From: Herve Codina To: Herve Codina , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Linus Walleij , Qiang Zhao , Li Yang , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Christophe Leroy , Randy Dunlap Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, Simon Horman , Christophe JAILLET , Thomas Petazzoni Subject: [PATCH v6 29/30] ASoC: codecs: Add support for the framer codec Date: Fri, 22 Sep 2023 09:59:04 +0200 Message-ID: <20230922075913.422435-30-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230922075913.422435-1-herve.codina@bootlin.com> References: <20230922075913.422435-1-herve.codina@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net The framer codec interacts with a framer. It allows to use some of the framer timeslots as audio channels to transport audio data over the framer E1/T1/J1 lines. It also reports line carrier detection events through the ALSA jack detection feature. Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- sound/soc/codecs/Kconfig | 15 ++ sound/soc/codecs/Makefile | 2 + sound/soc/codecs/framer-codec.c | 413 ++++++++++++++++++++++++++++++++ 3 files changed, 430 insertions(+) create mode 100644 sound/soc/codecs/framer-codec.c diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index f1e1dbc509f6..abb89796fd45 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -112,6 +112,7 @@ config SND_SOC_ALL_CODECS imply SND_SOC_ES8328_I2C imply SND_SOC_ES7134 imply SND_SOC_ES7241 + imply SND_SOC_FRAMER imply SND_SOC_GTM601 imply SND_SOC_HDAC_HDMI imply SND_SOC_HDAC_HDA @@ -1071,6 +1072,20 @@ config SND_SOC_ES8328_SPI depends on SPI_MASTER select SND_SOC_ES8328 +config SND_SOC_FRAMER + tristate "Framer codec" + depends on GENERIC_FRAMER + help + Enable support for the framer codec. + The framer codec uses the generic framer infrastructure to transport + some audio data over an analog E1/T1/J1 line. + This codec allows to use some of the time slots available on the TDM + bus on which the framer is connected to transport the audio data. + + To compile this driver as a module, choose M here: the module + will be called snd-soc-framer. + + config SND_SOC_GTM601 tristate 'GTM601 UMTS modem audio codec' diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index a87e56938ce5..c6bb88cd687a 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -119,6 +119,7 @@ snd-soc-es8326-objs := es8326.o snd-soc-es8328-objs := es8328.o snd-soc-es8328-i2c-objs := es8328-i2c.o snd-soc-es8328-spi-objs := es8328-spi.o +snd-soc-framer-objs := framer-codec.o snd-soc-gtm601-objs := gtm601.o snd-soc-hdac-hdmi-objs := hdac_hdmi.o snd-soc-hdac-hda-objs := hdac_hda.o @@ -505,6 +506,7 @@ obj-$(CONFIG_SND_SOC_ES8326) += snd-soc-es8326.o obj-$(CONFIG_SND_SOC_ES8328) += snd-soc-es8328.o obj-$(CONFIG_SND_SOC_ES8328_I2C)+= snd-soc-es8328-i2c.o obj-$(CONFIG_SND_SOC_ES8328_SPI)+= snd-soc-es8328-spi.o +obj-$(CONFIG_SND_SOC_FRAMER) += snd-soc-framer.o obj-$(CONFIG_SND_SOC_GTM601) += snd-soc-gtm601.o obj-$(CONFIG_SND_SOC_HDAC_HDMI) += snd-soc-hdac-hdmi.o obj-$(CONFIG_SND_SOC_HDAC_HDA) += snd-soc-hdac-hda.o diff --git a/sound/soc/codecs/framer-codec.c b/sound/soc/codecs/framer-codec.c new file mode 100644 index 000000000000..e5fcde9ee308 --- /dev/null +++ b/sound/soc/codecs/framer-codec.c @@ -0,0 +1,413 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Framer ALSA SoC driver +// +// Copyright 2023 CS GROUP France +// +// Author: Herve Codina + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define FRAMER_NB_CHANNEL 32 +#define FRAMER_JACK_MASK (SND_JACK_LINEIN | SND_JACK_LINEOUT) + +struct framer_codec { + struct framer *framer; + 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 framer_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, + unsigned int rx_mask, int slots, int width) +{ + struct framer_codec *framer = 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; + } + + framer->max_chan_playback = hweight32(tx_mask); + if (framer->max_chan_playback > FRAMER_NB_CHANNEL) { + dev_err(dai->dev, "too many tx slots defined (mask = 0x%x) supported max %d\n", + tx_mask, FRAMER_NB_CHANNEL); + return -EINVAL; + } + + framer->max_chan_capture = hweight32(rx_mask); + if (framer->max_chan_capture > FRAMER_NB_CHANNEL) { + dev_err(dai->dev, "too many rx slots defined (mask = 0x%x) supported max %d\n", + rx_mask, FRAMER_NB_CHANNEL); + return -EINVAL; + } + + return 0; +} + +/* + * The constraints for format/channel is to match with the number of 8bit + * time-slots available. + */ +static int framer_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}; + int width; + + width = snd_pcm_format_physical_width(format); + if (width == 8 || width == 16 || width == 32 || width == 64) { + ch.max = nb_ts * 8 / width; + } else { + dev_err(dai->dev, "format physical width %d not supported\n", width); + return -EINVAL; + } + + ch.min = ch.max ? 1 : 0; + + return snd_interval_refine(c, &ch); +} + +static int framer_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 framer_codec *framer = snd_soc_component_get_drvdata(dai->component); + + return framer_dai_hw_rule_channels_by_format(dai, params, framer->max_chan_playback); +} + +static int framer_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 framer_codec *framer = snd_soc_component_get_drvdata(dai->component); + + return framer_dai_hw_rule_channels_by_format(dai, params, framer->max_chan_capture); +} + +static int framer_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; + snd_pcm_format_t format; + struct snd_mask f_new; + + 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); + pcm_for_each_format(format) { + if (snd_mask_test_format(f_old, format)) { + if (snd_pcm_format_physical_width(format) <= slot_width) + snd_mask_set_format(&f_new, format); + } + } + + return snd_mask_refine(f_old, &f_new); +} + +static int framer_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 framer_codec *framer = snd_soc_component_get_drvdata(dai->component); + + return framer_dai_hw_rule_format_by_channels(dai, params, framer->max_chan_playback); +} + +static int framer_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 framer_codec *framer = snd_soc_component_get_drvdata(dai->component); + + return framer_dai_hw_rule_format_by_channels(dai, params, framer->max_chan_capture); +} + +static u64 framer_formats(u8 nb_ts) +{ + unsigned int format_width; + unsigned int chan_width; + snd_pcm_format_t format; + u64 formats_mask; + + if (!nb_ts) + return 0; + + formats_mask = 0; + chan_width = nb_ts * 8; + pcm_for_each_format(format) { + /* Support physical width multiple of 8bit */ + format_width = snd_pcm_format_physical_width(format); + 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_mask |= pcm_format_to_bits(format); + } + return formats_mask; +} + +static int framer_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct framer_codec *framer = 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 = framer_formats(framer->max_chan_capture); + hw_rule_channels_by_format = framer_dai_hw_rule_capture_channels_by_format; + hw_rule_format_by_channels = framer_dai_hw_rule_capture_format_by_channels; + frame_bits = framer->max_chan_capture * 8; + } else { + format = framer_formats(framer->max_chan_playback); + hw_rule_channels_by_format = framer_dai_hw_rule_playback_channels_by_format; + hw_rule_format_by_channels = framer_dai_hw_rule_playback_format_by_channels; + frame_bits = framer->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 framer_dai_formats[] = { + SND_SOC_POSSIBLE_DAIFMT_DSP_B, +}; + +static const struct snd_soc_dai_ops framer_dai_ops = { + .startup = framer_dai_startup, + .set_tdm_slot = framer_dai_set_tdm_slot, + .auto_selectable_formats = framer_dai_formats, + .num_auto_selectable_formats = ARRAY_SIZE(framer_dai_formats), +}; + +static struct snd_soc_dai_driver framer_dai_driver = { + .name = "framer", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = FRAMER_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 = FRAMER_NB_CHANNEL, + .rates = SNDRV_PCM_RATE_8000, + .formats = U64_MAX, /* Will be refined on DAI .startup() */ + }, + .ops = &framer_dai_ops, +}; + +static void framer_carrier_work(struct work_struct *work) +{ + struct framer_codec *framer = container_of(work, struct framer_codec, carrier_work); + struct framer_status framer_status; + int jack_status; + int ret; + + ret = framer_get_status(framer->framer, &framer_status); + if (ret) { + dev_err(framer->dev, "get framer status failed (%d)\n", ret); + return; + } + + jack_status = framer_status.link_is_on ? FRAMER_JACK_MASK : 0; + snd_soc_jack_report(&framer->jack, jack_status, FRAMER_JACK_MASK); +} + +static int framer_carrier_notifier(struct notifier_block *nb, unsigned long action, + void *data) +{ + struct framer_codec *framer = container_of(nb, struct framer_codec, nb); + + switch (action) { + case FRAMER_EVENT_STATUS: + queue_work(system_power_efficient_wq, &framer->carrier_work); + break; + default: + return NOTIFY_DONE; + } + + return NOTIFY_OK; +} + +static int framer_component_probe(struct snd_soc_component *component) +{ + struct framer_codec *framer = snd_soc_component_get_drvdata(component); + struct framer_status status; + char *name; + int ret; + + INIT_WORK(&framer->carrier_work, framer_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, FRAMER_JACK_MASK, &framer->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; + } + + ret = framer_init(framer->framer); + if (ret) { + dev_err(component->dev, "framer init failed (%d)\n", ret); + return ret; + } + + ret = framer_power_on(framer->framer); + if (ret) { + dev_err(component->dev, "framer power-on failed (%d)\n", ret); + goto framer_exit; + } + + /* Be sure that get_status is supported */ + ret = framer_get_status(framer->framer, &status); + if (ret) { + dev_err(component->dev, "get framer status failed (%d)\n", ret); + goto framer_power_off; + } + + framer->nb.notifier_call = framer_carrier_notifier; + ret = framer_notifier_register(framer->framer, &framer->nb); + if (ret) { + dev_err(component->dev, "Cannot register event notifier\n"); + goto framer_power_off; + } + + /* Queue work to set the initial value */ + queue_work(system_power_efficient_wq, &framer->carrier_work); + + return 0; + +framer_power_off: + framer_power_off(framer->framer); +framer_exit: + framer_exit(framer->framer); + return ret; +} + +static void framer_component_remove(struct snd_soc_component *component) +{ + struct framer_codec *framer = snd_soc_component_get_drvdata(component); + + framer_notifier_unregister(framer->framer, &framer->nb); + cancel_work_sync(&framer->carrier_work); + framer_power_off(framer->framer); + framer_exit(framer->framer); +} + +static const struct snd_soc_component_driver framer_component_driver = { + .probe = framer_component_probe, + .remove = framer_component_remove, + .endianness = 1, +}; + +static int framer_codec_probe(struct platform_device *pdev) +{ + struct framer_codec *framer; + + framer = devm_kzalloc(&pdev->dev, sizeof(*framer), GFP_KERNEL); + if (!framer) + return -ENOMEM; + + framer->dev = &pdev->dev; + + /* Get framer from parents node */ + framer->framer = devm_framer_get(&pdev->dev, NULL); + if (IS_ERR(framer->framer)) + return dev_err_probe(&pdev->dev, PTR_ERR(framer->framer), "get framer failed\n"); + + platform_set_drvdata(pdev, framer); + + return devm_snd_soc_register_component(&pdev->dev, &framer_component_driver, + &framer_dai_driver, 1); +} + +static struct platform_driver framer_codec_driver = { + .driver = { + .name = "framer-codec", + }, + .probe = framer_codec_probe, +}; +module_platform_driver(framer_codec_driver); + +MODULE_AUTHOR("Herve Codina "); +MODULE_DESCRIPTION("FRAMER ALSA SoC driver"); +MODULE_LICENSE("GPL");