--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// sdw-mockup.c -- a mockup SoundWire codec for tests where only the host
+// drives the bus.
+//
+// Copyright(c) 2021 Intel Corporation
+//
+//
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_type.h>
+#include <linux/soundwire/sdw_registers.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+struct sdw_mockup_priv {
+ struct sdw_slave *slave;
+};
+
+struct sdw_stream_data {
+ struct sdw_stream_runtime *sdw_stream;
+};
+
+static int sdw_mockup_component_probe(struct snd_soc_component *component)
+{
+ return 0;
+}
+
+static void sdw_mockup_component_remove(struct snd_soc_component *component)
+{
+}
+
+static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = {
+ .probe = sdw_mockup_component_probe,
+ .remove = sdw_mockup_component_remove,
+};
+
+static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
+ int direction)
+{
+ struct sdw_stream_data *stream;
+
+ if (!sdw_stream)
+ return 0;
+
+ stream = kzalloc(sizeof(*stream), GFP_KERNEL);
+ if (!stream)
+ return -ENOMEM;
+
+ stream->sdw_stream = sdw_stream;
+
+ /* Use tx_mask or rx_mask to configure stream tag and set dma_data */
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+ dai->playback_dma_data = stream;
+ else
+ dai->capture_dma_data = stream;
+
+ return 0;
+}
+
+static void sdw_mockup_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct sdw_stream_data *stream;
+
+ stream = snd_soc_dai_get_dma_data(dai, substream);
+ snd_soc_dai_set_dma_data(dai, substream, NULL);
+ kfree(stream);
+}
+
+static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
+ struct sdw_stream_config stream_config;
+ struct sdw_port_config port_config;
+ enum sdw_data_direction direction;
+ struct sdw_stream_data *stream;
+ int num_channels;
+ int port;
+ int ret;
+
+ stream = snd_soc_dai_get_dma_data(dai, substream);
+ if (!stream)
+ return -EINVAL;
+
+ if (!sdw_mockup->slave)
+ return -EINVAL;
+
+ /* SoundWire specific configuration */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ direction = SDW_DATA_DIR_RX;
+ port = 1;
+ } else {
+ direction = SDW_DATA_DIR_TX;
+ port = 8;
+ }
+
+ stream_config.frame_rate = params_rate(params);
+ stream_config.ch_count = params_channels(params);
+ stream_config.bps = snd_pcm_format_width(params_format(params));
+ stream_config.direction = direction;
+
+ num_channels = params_channels(params);
+ port_config.ch_mask = (1 << num_channels) - 1;
+ port_config.num = port;
+
+ ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config,
+ &port_config, 1, stream->sdw_stream);
+ if (ret)
+ dev_err(dai->dev, "Unable to configure port\n");
+
+ return ret;
+}
+
+static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
+ struct sdw_stream_data *stream =
+ snd_soc_dai_get_dma_data(dai, substream);
+
+ if (!sdw_mockup->slave)
+ return -EINVAL;
+
+ sdw_stream_remove_slave(sdw_mockup->slave, stream->sdw_stream);
+ return 0;
+}
+
+static const struct snd_soc_dai_ops sdw_mockup_ops = {
+ .hw_params = sdw_mockup_pcm_hw_params,
+ .hw_free = sdw_mockup_pcm_hw_free,
+ .set_sdw_stream = sdw_mockup_set_sdw_stream,
+ .shutdown = sdw_mockup_shutdown,
+};
+
+static struct snd_soc_dai_driver sdw_mockup_dai[] = {
+ {
+ .name = "sdw-mockup-aif1",
+ .id = 1,
+ .playback = {
+ .stream_name = "DP1 Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ },
+ .capture = {
+ .stream_name = "DP8 Capture",
+ .channels_min = 1,
+ .channels_max = 2,
+ },
+ .ops = &sdw_mockup_ops,
+ },
+};
+
+static int sdw_mockup_update_status(struct sdw_slave *slave,
+ enum sdw_slave_status status)
+{
+ return 0;
+}
+
+static int sdw_mockup_read_prop(struct sdw_slave *slave)
+{
+ struct sdw_slave_prop *prop = &slave->prop;
+ int nval;
+ int i, j;
+ u32 bit;
+ unsigned long addr;
+ struct sdw_dpn_prop *dpn;
+
+ prop->paging_support = false;
+
+ /*
+ * first we need to allocate memory for set bits in port lists
+ * the port allocation is completely arbitrary:
+ * DP0 is not supported
+ * DP1 is sink
+ * DP8 is source
+ */
+ prop->source_ports = BIT(8);
+ prop->sink_ports = BIT(1);
+
+ nval = hweight32(prop->source_ports);
+ prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
+ sizeof(*prop->src_dpn_prop),
+ GFP_KERNEL);
+ if (!prop->src_dpn_prop)
+ return -ENOMEM;
+
+ i = 0;
+ dpn = prop->src_dpn_prop;
+ addr = prop->source_ports;
+ for_each_set_bit(bit, &addr, 32) {
+ dpn[i].num = bit;
+ dpn[i].type = SDW_DPN_FULL;
+ dpn[i].simple_ch_prep_sm = true;
+ i++;
+ }
+
+ /* do this again for sink now */
+ nval = hweight32(prop->sink_ports);
+ prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
+ sizeof(*prop->sink_dpn_prop),
+ GFP_KERNEL);
+ if (!prop->sink_dpn_prop)
+ return -ENOMEM;
+
+ j = 0;
+ dpn = prop->sink_dpn_prop;
+ addr = prop->sink_ports;
+ for_each_set_bit(bit, &addr, 32) {
+ dpn[j].num = bit;
+ dpn[j].type = SDW_DPN_FULL;
+ dpn[j].simple_ch_prep_sm = true;
+ j++;
+ }
+
+ prop->simple_clk_stop_capable = true;
+
+ /* wake-up event */
+ prop->wake_capable = 0;
+
+ return 0;
+}
+
+static int sdw_mockup_bus_config(struct sdw_slave *slave,
+ struct sdw_bus_params *params)
+{
+ return 0;
+}
+
+static int sdw_mockup_interrupt_callback(struct sdw_slave *slave,
+ struct sdw_slave_intr_status *status)
+{
+ return 0;
+}
+
+static const struct sdw_slave_ops sdw_mockup_slave_ops = {
+ .read_prop = sdw_mockup_read_prop,
+ .interrupt_callback = sdw_mockup_interrupt_callback,
+ .update_status = sdw_mockup_update_status,
+ .bus_config = sdw_mockup_bus_config,
+};
+
+static int sdw_mockup_sdw_probe(struct sdw_slave *slave,
+ const struct sdw_device_id *id)
+{
+ struct device *dev = &slave->dev;
+ struct sdw_mockup_priv *sdw_mockup;
+ int ret;
+
+ sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL);
+ if (!sdw_mockup)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, sdw_mockup);
+ sdw_mockup->slave = slave;
+
+ ret = devm_snd_soc_register_component(dev,
+ &snd_soc_sdw_mockup_component,
+ sdw_mockup_dai,
+ ARRAY_SIZE(sdw_mockup_dai));
+
+ return ret;
+}
+
+static int sdw_mockup_sdw_remove(struct sdw_slave *slave)
+{
+ return 0;
+}
+
+/*
+ * Intel reserved parts ID with the following mapping expected:
+ * 0xAAAA: generic full-duplex codec
+ * 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex
+ * 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with
+ * IV feedback
+ * 0x5555: mic codec (mock-up of RT715) - capture-only
+ */
+static const struct sdw_device_id sdw_mockup_id[] = {
+ SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0),
+ SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0),
+ SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0),
+ SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0),
+ {},
+};
+MODULE_DEVICE_TABLE(sdw, sdw_mockup_id);
+
+static struct sdw_driver sdw_mockup_sdw_driver = {
+ .driver = {
+ .name = "sdw-mockup",
+ .owner = THIS_MODULE,
+ },
+ .probe = sdw_mockup_sdw_probe,
+ .remove = sdw_mockup_sdw_remove,
+ .ops = &sdw_mockup_slave_ops,
+ .id_table = sdw_mockup_id,
+};
+module_sdw_driver(sdw_mockup_sdw_driver);
+
+MODULE_DESCRIPTION("ASoC SDW mockup codec driver");
+MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff