// 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 #include #include #include #include #include #include #include #include #include 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; slave->is_mockup_device = true; 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 "); MODULE_LICENSE("GPL");