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313 lines
7.5 KiB
313 lines
7.5 KiB
// 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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.endianness = 1, |
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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_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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slave->is_mockup_device = true; |
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL");
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