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Message-ID: <2e253048-a36e-4fee-b2f4-22f19230cf54@lunn.ch>
Date: Tue, 1 Aug 2023 12:30:26 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Herve Codina <herve.codina@...tlin.com>
Cc: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>,
Shengjiu Wang <shengjiu.wang@...il.com>,
Xiubo Li <Xiubo.Lee@...il.com>,
Fabio Estevam <festevam@...il.com>,
Nicolin Chen <nicoleotsuka@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Randy Dunlap <rdunlap@...radead.org>, netdev@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 26/28] ASoC: codecs: Add support for the framer codec
On Wed, Jul 26, 2023 at 05:02:22PM +0200, Herve Codina wrote:
> The framer codec interracts 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 <herve.codina@...tlin.com>
> ---
> sound/soc/codecs/Kconfig | 15 ++
> sound/soc/codecs/Makefile | 2 +
> sound/soc/codecs/framer-codec.c | 423 ++++++++++++++++++++++++++++++++
> 3 files changed, 440 insertions(+)
> create mode 100644 sound/soc/codecs/framer-codec.c
>
> diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
> index f99203ef9b03..a86cdac39b72 100644
> --- a/sound/soc/codecs/Kconfig
> +++ b/sound/soc/codecs/Kconfig
> @@ -110,6 +110,7 @@ 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
> @@ -1043,6 +1044,20 @@ 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 32dcc6de58bd..54667274a0f6 100644
> --- a/sound/soc/codecs/Makefile
> +++ b/sound/soc/codecs/Makefile
> @@ -116,6 +116,7 @@ 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
> @@ -499,6 +500,7 @@ 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..52b4546a61ee
> --- /dev/null
> +++ b/sound/soc/codecs/framer-codec.c
> @@ -0,0 +1,423 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Framer ALSA SoC driver
> +//
> +// Copyright 2023 CS GROUP France
> +//
> +// Author: Herve Codina <herve.codina@...tlin.com>
> +
> +#include <linux/clk.h>
> +#include <linux/framer/framer.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 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 much tx slots defined (mask = 0x%x) support max %d\n",
"many", not "much".
Also, "supported".
Andrew
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