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@bootlin.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@bootlin.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