soc/codecs/sdw-mockup.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 //
0003 // sdw-mockup.c -- a mockup SoundWire codec for tests where only the host
0004 // drives the bus.
0005 //
0006 // Copyright(c) 2021 Intel Corporation
0007 //
0008 //
0009
0010 #include <linux/device.h>
0011 #include <linux/mod_devicetable.h>
0012 #include <linux/module.h>
0013 #include <linux/soundwire/sdw.h>
0014 #include <linux/soundwire/sdw_type.h>
0015 #include <linux/soundwire/sdw_registers.h>
0016 #include <sound/core.h>
0017 #include <sound/pcm.h>
0018 #include <sound/pcm_params.h>
0019 #include <sound/soc.h>
0020
0021 struct  sdw_mockup_priv {
0022     struct sdw_slave *slave;
0023 };
0024
0025 struct sdw_stream_data {
0026     struct sdw_stream_runtime *sdw_stream;
0027 };
0028
0029 static int sdw_mockup_component_probe(struct snd_soc_component *component)
0030 {
0031     return 0;
0032 }
0033
0034 static void sdw_mockup_component_remove(struct snd_soc_component *component)
0035 {
0036 }
0037
0038 static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = {
0039     .probe = sdw_mockup_component_probe,
0040     .remove = sdw_mockup_component_remove,
0041     .endianness = 1,
0042 };
0043
0044 static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream,
0045                      int direction)
0046 {
0047     struct sdw_stream_data *stream;
0048
0049     if (!sdw_stream)
0050         return 0;
0051
0052     stream = kzalloc(sizeof(*stream), GFP_KERNEL);
0053     if (!stream)
0054         return -ENOMEM;
0055
0056     stream->sdw_stream = sdw_stream;
0057
0058     /* Use tx_mask or rx_mask to configure stream tag and set dma_data */
0059     if (direction == SNDRV_PCM_STREAM_PLAYBACK)
0060         dai->playback_dma_data = stream;
0061     else
0062         dai->capture_dma_data = stream;
0063
0064     return 0;
0065 }
0066
0067 static void sdw_mockup_shutdown(struct snd_pcm_substream *substream,
0068                 struct snd_soc_dai *dai)
0069 {
0070     struct sdw_stream_data *stream;
0071
0072     stream = snd_soc_dai_get_dma_data(dai, substream);
0073     snd_soc_dai_set_dma_data(dai, substream, NULL);
0074     kfree(stream);
0075 }
0076
0077 static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream,
0078                     struct snd_pcm_hw_params *params,
0079                     struct snd_soc_dai *dai)
0080 {
0081     struct snd_soc_component *component = dai->component;
0082     struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
0083     struct sdw_stream_config stream_config;
0084     struct sdw_port_config port_config;
0085     enum sdw_data_direction direction;
0086     struct sdw_stream_data *stream;
0087     int num_channels;
0088     int port;
0089     int ret;
0090
0091     stream = snd_soc_dai_get_dma_data(dai, substream);
0092     if (!stream)
0093         return -EINVAL;
0094
0095     if (!sdw_mockup->slave)
0096         return -EINVAL;
0097
0098     /* SoundWire specific configuration */
0099     if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
0100         direction = SDW_DATA_DIR_RX;
0101         port = 1;
0102     } else {
0103         direction = SDW_DATA_DIR_TX;
0104         port = 8;
0105     }
0106
0107     stream_config.frame_rate = params_rate(params);
0108     stream_config.ch_count = params_channels(params);
0109     stream_config.bps = snd_pcm_format_width(params_format(params));
0110     stream_config.direction = direction;
0111
0112     num_channels = params_channels(params);
0113     port_config.ch_mask = (1 << num_channels) - 1;
0114     port_config.num = port;
0115
0116     ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config,
0117                    &port_config, 1, stream->sdw_stream);
0118     if (ret)
0119         dev_err(dai->dev, "Unable to configure port\n");
0120
0121     return ret;
0122 }
0123
0124 static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream,
0125                   struct snd_soc_dai *dai)
0126 {
0127     struct snd_soc_component *component = dai->component;
0128     struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component);
0129     struct sdw_stream_data *stream =
0130         snd_soc_dai_get_dma_data(dai, substream);
0131
0132     if (!sdw_mockup->slave)
0133         return -EINVAL;
0134
0135     sdw_stream_remove_slave(sdw_mockup->slave, stream->sdw_stream);
0136     return 0;
0137 }
0138
0139 static const struct snd_soc_dai_ops sdw_mockup_ops = {
0140     .hw_params  = sdw_mockup_pcm_hw_params,
0141     .hw_free    = sdw_mockup_pcm_hw_free,
0142     .set_stream = sdw_mockup_set_sdw_stream,
0143     .shutdown   = sdw_mockup_shutdown,
0144 };
0145
0146 static struct snd_soc_dai_driver sdw_mockup_dai[] = {
0147     {
0148         .name = "sdw-mockup-aif1",
0149         .id = 1,
0150         .playback = {
0151             .stream_name = "DP1 Playback",
0152             .channels_min = 1,
0153             .channels_max = 2,
0154         },
0155         .capture = {
0156             .stream_name = "DP8 Capture",
0157             .channels_min = 1,
0158             .channels_max = 2,
0159         },
0160         .ops = &sdw_mockup_ops,
0161     },
0162 };
0163
0164 static int sdw_mockup_update_status(struct sdw_slave *slave,
0165                     enum sdw_slave_status status)
0166 {
0167     return 0;
0168 }
0169
0170 static int sdw_mockup_read_prop(struct sdw_slave *slave)
0171 {
0172     struct sdw_slave_prop *prop = &slave->prop;
0173     int nval;
0174     int i, j;
0175     u32 bit;
0176     unsigned long addr;
0177     struct sdw_dpn_prop *dpn;
0178
0179     prop->paging_support = false;
0180
0181     /*
0182      * first we need to allocate memory for set bits in port lists
0183      * the port allocation is completely arbitrary:
0184      * DP0 is not supported
0185      * DP1 is sink
0186      * DP8 is source
0187      */
0188     prop->source_ports = BIT(8);
0189     prop->sink_ports = BIT(1);
0190
0191     nval = hweight32(prop->source_ports);
0192     prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
0193                       sizeof(*prop->src_dpn_prop),
0194                       GFP_KERNEL);
0195     if (!prop->src_dpn_prop)
0196         return -ENOMEM;
0197
0198     i = 0;
0199     dpn = prop->src_dpn_prop;
0200     addr = prop->source_ports;
0201     for_each_set_bit(bit, &addr, 32) {
0202         dpn[i].num = bit;
0203         dpn[i].type = SDW_DPN_FULL;
0204         dpn[i].simple_ch_prep_sm = true;
0205         i++;
0206     }
0207
0208     /* do this again for sink now */
0209     nval = hweight32(prop->sink_ports);
0210     prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
0211                        sizeof(*prop->sink_dpn_prop),
0212                        GFP_KERNEL);
0213     if (!prop->sink_dpn_prop)
0214         return -ENOMEM;
0215
0216     j = 0;
0217     dpn = prop->sink_dpn_prop;
0218     addr = prop->sink_ports;
0219     for_each_set_bit(bit, &addr, 32) {
0220         dpn[j].num = bit;
0221         dpn[j].type = SDW_DPN_FULL;
0222         dpn[j].simple_ch_prep_sm = true;
0223         j++;
0224     }
0225
0226     prop->simple_clk_stop_capable = true;
0227
0228     /* wake-up event */
0229     prop->wake_capable = 0;
0230
0231     return 0;
0232 }
0233
0234 static int sdw_mockup_bus_config(struct sdw_slave *slave,
0235                  struct sdw_bus_params *params)
0236 {
0237     return 0;
0238 }
0239
0240 static int sdw_mockup_interrupt_callback(struct sdw_slave *slave,
0241                      struct sdw_slave_intr_status *status)
0242 {
0243     return 0;
0244 }
0245
0246 static const struct sdw_slave_ops sdw_mockup_slave_ops = {
0247     .read_prop = sdw_mockup_read_prop,
0248     .interrupt_callback = sdw_mockup_interrupt_callback,
0249     .update_status = sdw_mockup_update_status,
0250     .bus_config = sdw_mockup_bus_config,
0251 };
0252
0253 static int sdw_mockup_sdw_probe(struct sdw_slave *slave,
0254                 const struct sdw_device_id *id)
0255 {
0256     struct device *dev = &slave->dev;
0257     struct sdw_mockup_priv *sdw_mockup;
0258     int ret;
0259
0260     sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL);
0261     if (!sdw_mockup)
0262         return -ENOMEM;
0263
0264     dev_set_drvdata(dev, sdw_mockup);
0265     sdw_mockup->slave = slave;
0266
0267     slave->is_mockup_device = true;
0268
0269     ret =  devm_snd_soc_register_component(dev,
0270                            &snd_soc_sdw_mockup_component,
0271                            sdw_mockup_dai,
0272                            ARRAY_SIZE(sdw_mockup_dai));
0273
0274     return ret;
0275 }
0276
0277 static int sdw_mockup_sdw_remove(struct sdw_slave *slave)
0278 {
0279     return 0;
0280 }
0281
0282 /*
0283  * Intel reserved parts ID with the following mapping expected:
0284  * 0xAAAA: generic full-duplex codec
0285  * 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex
0286  * 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with
0287  * IV feedback
0288  * 0x5555: mic codec (mock-up of RT715) - capture-only
0289  */
0290 static const struct sdw_device_id sdw_mockup_id[] = {
0291     SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0),
0292     SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0),
0293     SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0),
0294     SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0),
0295     {},
0296 };
0297 MODULE_DEVICE_TABLE(sdw, sdw_mockup_id);
0298
0299 static struct sdw_driver sdw_mockup_sdw_driver = {
0300     .driver = {
0301         .name = "sdw-mockup",
0302         .owner = THIS_MODULE,
0303     },
0304     .probe = sdw_mockup_sdw_probe,
0305     .remove = sdw_mockup_sdw_remove,
0306     .ops = &sdw_mockup_slave_ops,
0307     .id_table = sdw_mockup_id,
0308 };
0309 module_sdw_driver(sdw_mockup_sdw_driver);
0310
0311 MODULE_DESCRIPTION("ASoC SDW mockup codec driver");
0312 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>");
0313 MODULE_LICENSE("GPL");