ASoC: codecs: add SoundWire mockup device support
To test the host controller and bus management code, it is currently required to have a physical SoundWire peripheral attached to the bus. To help with pre-silicon or early hardware enablement, it would be very useful to have a SoundWire 'mockup' device that is exposed in platform firmware but does not drive any signal on the bus. This is different to the existing ASoC 'dummy' codec uses for I2S/TDM, the SoundWire spec makes it clear that a device that is not attached to the bus is not permitted to interact with the bus, be it for command/control or data. This patch exposes a 'mockup' device, with a minimalist driver, with 4 partID values reserved by Intel for such test configurations. The mockup device exposes one full-duplex DAI based on 2 ports (DP1 for playback and DP8 for capture). The capture data port is just virtual, such a mockup device is prevented by the SoundWire specification from presenting any data generated by a Source port without being Attached. All the callbacks exposed by the SoundWire Slave interface are populated, even if they just return immediately. This is intentional to describe what a minimal codec driver should do and implement and help new codec vendors provide support for their devices. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20210714032209.11284-2-yung-chuan.liao@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart
Mark Brown
parent
e73f0f0ee7
commit
81d3d3d0bf
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@ -187,6 +187,7 @@ config SND_SOC_ALL_CODECS
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imply SND_SOC_RT715_SDCA_SDW
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imply SND_SOC_RT1308_SDW
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imply SND_SOC_RT1316_SDW
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imply SND_SOC_SDW_MOCKUP
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imply SND_SOC_SGTL5000
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imply SND_SOC_SI476X
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imply SND_SOC_SIMPLE_AMPLIFIER
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@ -1287,6 +1288,23 @@ config SND_SOC_RT715_SDCA_SDW
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select REGMAP_SOUNDWIRE
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select REGMAP_SOUNDWIRE_MBQ
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config SND_SOC_SDW_MOCKUP
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tristate "SoundWire mockup codec"
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depends on EXPERT
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depends on SOUNDWIRE
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help
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This option enables a SoundWire mockup codec that does not drive the
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bus, take part in the command/command protocol or generate data on a
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Source port.
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This option is only intended to be used for tests on a device
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with a connector, in combination with a bus analyzer, or to test new
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topologies that differ from the actual hardware layout.
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This mockup device could be totally virtual but could also be a
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real physical one with one key restriction: it is not allowed by the
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SoundWire specification to be configured via a sideband mechanism and
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generate audio data for capture. However, nothing prevents such a
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peripheral device from snooping the bus.
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#Freescale sgtl5000 codec
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config SND_SOC_SGTL5000
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tristate "Freescale SGTL5000 CODEC"
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@ -203,6 +203,7 @@ snd-soc-rt711-objs := rt711.o rt711-sdw.o
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snd-soc-rt711-sdca-objs := rt711-sdca.o rt711-sdca-sdw.o
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snd-soc-rt715-objs := rt715.o rt715-sdw.o
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snd-soc-rt715-sdca-objs := rt715-sdca.o rt715-sdca-sdw.o
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snd-soc-sdw-mockup-objs := sdw-mockup.o
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snd-soc-sgtl5000-objs := sgtl5000.o
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snd-soc-alc5623-objs := alc5623.o
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snd-soc-alc5632-objs := alc5632.o
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@ -530,6 +531,7 @@ obj-$(CONFIG_SND_SOC_RT711) += snd-soc-rt711.o
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obj-$(CONFIG_SND_SOC_RT711_SDCA_SDW) += snd-soc-rt711-sdca.o
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obj-$(CONFIG_SND_SOC_RT715) += snd-soc-rt715.o
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obj-$(CONFIG_SND_SOC_RT715_SDCA_SDW) += snd-soc-rt715-sdca.o
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obj-$(CONFIG_SND_SOC_SDW_MOCKUP) += snd-soc-sdw-mockup.o
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obj-$(CONFIG_SND_SOC_SGTL5000) += snd-soc-sgtl5000.o
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obj-$(CONFIG_SND_SOC_SIGMADSP) += snd-soc-sigmadsp.o
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obj-$(CONFIG_SND_SOC_SIGMADSP_I2C) += snd-soc-sigmadsp-i2c.o
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@ -0,0 +1,310 @@
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// SPDX-License-Identifier: GPL-2.0-only
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//
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// sdw-mockup.c -- a mockup SoundWire codec for tests where only the host
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// drives the bus.
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//
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// Copyright(c) 2021 Intel Corporation
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//
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//
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/soundwire/sdw.h>
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#include <linux/soundwire/sdw_type.h>
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#include <linux/soundwire/sdw_registers.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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struct sdw_mockup_priv {
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struct sdw_slave *slave;
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};
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struct sdw_stream_data {
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struct sdw_stream_runtime *sdw_stream;
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};
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static int sdw_mockup_component_probe(struct snd_soc_component *component)
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{
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return 0;
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}
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static void sdw_mockup_component_remove(struct snd_soc_component *component)
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{
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}
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static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = {
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.probe = sdw_mockup_component_probe,
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.remove = sdw_mockup_component_remove,
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};
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static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
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int direction)
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{
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struct sdw_stream_data *stream;
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if (!sdw_stream)
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return 0;
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stream = kzalloc(sizeof(*stream), GFP_KERNEL);
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if (!stream)
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return -ENOMEM;
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stream->sdw_stream = sdw_stream;
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/* Use tx_mask or rx_mask to configure stream tag and set dma_data */
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if (direction == SNDRV_PCM_STREAM_PLAYBACK)
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dai->playback_dma_data = stream;
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else
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dai->capture_dma_data = stream;
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return 0;
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}
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static void sdw_mockup_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct sdw_stream_data *stream;
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stream = snd_soc_dai_get_dma_data(dai, substream);
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snd_soc_dai_set_dma_data(dai, substream, NULL);
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kfree(stream);
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}
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static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_component *component = dai->component;
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struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
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struct sdw_stream_config stream_config;
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struct sdw_port_config port_config;
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enum sdw_data_direction direction;
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struct sdw_stream_data *stream;
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int num_channels;
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int port;
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int ret;
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stream = snd_soc_dai_get_dma_data(dai, substream);
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if (!stream)
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return -EINVAL;
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if (!sdw_mockup->slave)
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return -EINVAL;
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/* SoundWire specific configuration */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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direction = SDW_DATA_DIR_RX;
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port = 1;
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} else {
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direction = SDW_DATA_DIR_TX;
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port = 8;
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}
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stream_config.frame_rate = params_rate(params);
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stream_config.ch_count = params_channels(params);
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stream_config.bps = snd_pcm_format_width(params_format(params));
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stream_config.direction = direction;
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num_channels = params_channels(params);
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port_config.ch_mask = (1 << num_channels) - 1;
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port_config.num = port;
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ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config,
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&port_config, 1, stream->sdw_stream);
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if (ret)
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dev_err(dai->dev, "Unable to configure port\n");
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return ret;
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}
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static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_component *component = dai->component;
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struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
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struct sdw_stream_data *stream =
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snd_soc_dai_get_dma_data(dai, substream);
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if (!sdw_mockup->slave)
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return -EINVAL;
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sdw_stream_remove_slave(sdw_mockup->slave, stream->sdw_stream);
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return 0;
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}
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static const struct snd_soc_dai_ops sdw_mockup_ops = {
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.hw_params = sdw_mockup_pcm_hw_params,
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.hw_free = sdw_mockup_pcm_hw_free,
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.set_sdw_stream = sdw_mockup_set_sdw_stream,
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.shutdown = sdw_mockup_shutdown,
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};
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static struct snd_soc_dai_driver sdw_mockup_dai[] = {
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{
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.name = "sdw-mockup-aif1",
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.id = 1,
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.playback = {
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.stream_name = "DP1 Playback",
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.channels_min = 1,
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.channels_max = 2,
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},
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.capture = {
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.stream_name = "DP8 Capture",
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.channels_min = 1,
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.channels_max = 2,
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},
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.ops = &sdw_mockup_ops,
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},
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};
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static int sdw_mockup_update_status(struct sdw_slave *slave,
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enum sdw_slave_status status)
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{
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return 0;
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}
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static int sdw_mockup_read_prop(struct sdw_slave *slave)
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{
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struct sdw_slave_prop *prop = &slave->prop;
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int nval;
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int i, j;
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u32 bit;
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unsigned long addr;
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struct sdw_dpn_prop *dpn;
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prop->paging_support = false;
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/*
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* first we need to allocate memory for set bits in port lists
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* the port allocation is completely arbitrary:
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* DP0 is not supported
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* DP1 is sink
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* DP8 is source
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*/
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prop->source_ports = BIT(8);
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prop->sink_ports = BIT(1);
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nval = hweight32(prop->source_ports);
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prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
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sizeof(*prop->src_dpn_prop),
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GFP_KERNEL);
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if (!prop->src_dpn_prop)
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return -ENOMEM;
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i = 0;
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dpn = prop->src_dpn_prop;
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addr = prop->source_ports;
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for_each_set_bit(bit, &addr, 32) {
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dpn[i].num = bit;
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dpn[i].type = SDW_DPN_FULL;
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dpn[i].simple_ch_prep_sm = true;
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i++;
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}
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/* do this again for sink now */
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nval = hweight32(prop->sink_ports);
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prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
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sizeof(*prop->sink_dpn_prop),
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GFP_KERNEL);
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if (!prop->sink_dpn_prop)
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return -ENOMEM;
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j = 0;
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dpn = prop->sink_dpn_prop;
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addr = prop->sink_ports;
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for_each_set_bit(bit, &addr, 32) {
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dpn[j].num = bit;
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dpn[j].type = SDW_DPN_FULL;
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dpn[j].simple_ch_prep_sm = true;
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j++;
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}
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prop->simple_clk_stop_capable = true;
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/* wake-up event */
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prop->wake_capable = 0;
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return 0;
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}
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static int sdw_mockup_bus_config(struct sdw_slave *slave,
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struct sdw_bus_params *params)
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{
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return 0;
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}
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static int sdw_mockup_interrupt_callback(struct sdw_slave *slave,
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struct sdw_slave_intr_status *status)
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{
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return 0;
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}
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static const struct sdw_slave_ops sdw_mockup_slave_ops = {
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.read_prop = sdw_mockup_read_prop,
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.interrupt_callback = sdw_mockup_interrupt_callback,
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.update_status = sdw_mockup_update_status,
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.bus_config = sdw_mockup_bus_config,
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};
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static int sdw_mockup_sdw_probe(struct sdw_slave *slave,
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const struct sdw_device_id *id)
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{
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struct device *dev = &slave->dev;
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struct sdw_mockup_priv *sdw_mockup;
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int ret;
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sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL);
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if (!sdw_mockup)
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return -ENOMEM;
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dev_set_drvdata(dev, sdw_mockup);
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sdw_mockup->slave = slave;
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ret = devm_snd_soc_register_component(dev,
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&snd_soc_sdw_mockup_component,
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sdw_mockup_dai,
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ARRAY_SIZE(sdw_mockup_dai));
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return ret;
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}
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static int sdw_mockup_sdw_remove(struct sdw_slave *slave)
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{
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return 0;
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}
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/*
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* Intel reserved parts ID with the following mapping expected:
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* 0xAAAA: generic full-duplex codec
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* 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex
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* 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with
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* IV feedback
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* 0x5555: mic codec (mock-up of RT715) - capture-only
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*/
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static const struct sdw_device_id sdw_mockup_id[] = {
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SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0),
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SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0),
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SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0),
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SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0),
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{},
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};
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MODULE_DEVICE_TABLE(sdw, sdw_mockup_id);
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static struct sdw_driver sdw_mockup_sdw_driver = {
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.driver = {
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.name = "sdw-mockup",
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.owner = THIS_MODULE,
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},
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.probe = sdw_mockup_sdw_probe,
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.remove = sdw_mockup_sdw_remove,
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.ops = &sdw_mockup_slave_ops,
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.id_table = sdw_mockup_id,
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};
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module_sdw_driver(sdw_mockup_sdw_driver);
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MODULE_DESCRIPTION("ASoC SDW mockup codec driver");
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MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>");
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MODULE_LICENSE("GPL");
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