1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // sdw-mockup.c -- a mockup SoundWire codec for tests where only the host 4 // drives the bus. 5 // 6 // Copyright(c) 2021 Intel Corporation 7 // 8 // 9 10 #include <linux/device.h> 11 #include <linux/mod_devicetable.h> 12 #include <linux/module.h> 13 #include <linux/soundwire/sdw.h> 14 #include <linux/soundwire/sdw_type.h> 15 #include <linux/soundwire/sdw_registers.h> 16 #include <sound/core.h> 17 #include <sound/pcm.h> 18 #include <sound/pcm_params.h> 19 #include <sound/sdw.h> 20 #include <sound/soc.h> 21 22 struct sdw_mockup_priv { 23 struct sdw_slave *slave; 24 }; 25 26 struct sdw_stream_data { 27 struct sdw_stream_runtime *sdw_stream; 28 }; 29 30 static int sdw_mockup_component_probe(struct snd_soc_component *component) 31 { 32 return 0; 33 } 34 35 static void sdw_mockup_component_remove(struct snd_soc_component *component) 36 { 37 } 38 39 static const struct snd_soc_component_driver snd_soc_sdw_mockup_component = { 40 .probe = sdw_mockup_component_probe, 41 .remove = sdw_mockup_component_remove, 42 .endianness = 1, 43 }; 44 45 static int sdw_mockup_set_sdw_stream(struct snd_soc_dai *dai, void *sdw_stream, 46 int direction) 47 { 48 struct sdw_stream_data *stream; 49 50 if (!sdw_stream) 51 return 0; 52 53 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 54 if (!stream) 55 return -ENOMEM; 56 57 stream->sdw_stream = sdw_stream; 58 59 /* Use tx_mask or rx_mask to configure stream tag and set dma_data */ 60 snd_soc_dai_dma_data_set(dai, direction, stream); 61 62 return 0; 63 } 64 65 static void sdw_mockup_shutdown(struct snd_pcm_substream *substream, 66 struct snd_soc_dai *dai) 67 { 68 struct sdw_stream_data *stream; 69 70 stream = snd_soc_dai_get_dma_data(dai, substream); 71 snd_soc_dai_set_dma_data(dai, substream, NULL); 72 kfree(stream); 73 } 74 75 static int sdw_mockup_pcm_hw_params(struct snd_pcm_substream *substream, 76 struct snd_pcm_hw_params *params, 77 struct snd_soc_dai *dai) 78 { 79 struct snd_soc_component *component = dai->component; 80 struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component); 81 struct sdw_stream_config stream_config = {0}; 82 struct sdw_port_config port_config = {0}; 83 struct sdw_stream_data *stream; 84 int ret; 85 86 stream = snd_soc_dai_get_dma_data(dai, substream); 87 if (!stream) 88 return -EINVAL; 89 90 if (!sdw_mockup->slave) 91 return -EINVAL; 92 93 /* SoundWire specific configuration */ 94 snd_sdw_params_to_config(substream, params, &stream_config, &port_config); 95 96 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 97 port_config.num = 1; 98 else 99 port_config.num = 8; 100 101 ret = sdw_stream_add_slave(sdw_mockup->slave, &stream_config, 102 &port_config, 1, stream->sdw_stream); 103 if (ret) 104 dev_err(dai->dev, "Unable to configure port\n"); 105 106 return ret; 107 } 108 109 static int sdw_mockup_pcm_hw_free(struct snd_pcm_substream *substream, 110 struct snd_soc_dai *dai) 111 { 112 struct snd_soc_component *component = dai->component; 113 struct sdw_mockup_priv *sdw_mockup = snd_soc_component_get_drvdata(component); 114 struct sdw_stream_data *stream = 115 snd_soc_dai_get_dma_data(dai, substream); 116 117 if (!sdw_mockup->slave) 118 return -EINVAL; 119 120 sdw_stream_remove_slave(sdw_mockup->slave, stream->sdw_stream); 121 return 0; 122 } 123 124 static const struct snd_soc_dai_ops sdw_mockup_ops = { 125 .hw_params = sdw_mockup_pcm_hw_params, 126 .hw_free = sdw_mockup_pcm_hw_free, 127 .set_stream = sdw_mockup_set_sdw_stream, 128 .shutdown = sdw_mockup_shutdown, 129 }; 130 131 static struct snd_soc_dai_driver sdw_mockup_dai[] = { 132 { 133 .name = "sdw-mockup-aif1", 134 .id = 1, 135 .playback = { 136 .stream_name = "DP1 Playback", 137 .channels_min = 1, 138 .channels_max = 2, 139 }, 140 .capture = { 141 .stream_name = "DP8 Capture", 142 .channels_min = 1, 143 .channels_max = 2, 144 }, 145 .ops = &sdw_mockup_ops, 146 }, 147 }; 148 149 static int sdw_mockup_update_status(struct sdw_slave *slave, 150 enum sdw_slave_status status) 151 { 152 return 0; 153 } 154 155 static int sdw_mockup_read_prop(struct sdw_slave *slave) 156 { 157 struct sdw_slave_prop *prop = &slave->prop; 158 int nval; 159 int i, j; 160 u32 bit; 161 unsigned long addr; 162 struct sdw_dpn_prop *dpn; 163 164 prop->paging_support = false; 165 166 /* 167 * first we need to allocate memory for set bits in port lists 168 * the port allocation is completely arbitrary: 169 * DP0 is not supported 170 * DP1 is sink 171 * DP8 is source 172 */ 173 prop->source_ports = BIT(8); 174 prop->sink_ports = BIT(1); 175 176 nval = hweight32(prop->source_ports); 177 prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval, 178 sizeof(*prop->src_dpn_prop), 179 GFP_KERNEL); 180 if (!prop->src_dpn_prop) 181 return -ENOMEM; 182 183 i = 0; 184 dpn = prop->src_dpn_prop; 185 addr = prop->source_ports; 186 for_each_set_bit(bit, &addr, 32) { 187 dpn[i].num = bit; 188 dpn[i].type = SDW_DPN_FULL; 189 dpn[i].simple_ch_prep_sm = true; 190 i++; 191 } 192 193 /* do this again for sink now */ 194 nval = hweight32(prop->sink_ports); 195 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval, 196 sizeof(*prop->sink_dpn_prop), 197 GFP_KERNEL); 198 if (!prop->sink_dpn_prop) 199 return -ENOMEM; 200 201 j = 0; 202 dpn = prop->sink_dpn_prop; 203 addr = prop->sink_ports; 204 for_each_set_bit(bit, &addr, 32) { 205 dpn[j].num = bit; 206 dpn[j].type = SDW_DPN_FULL; 207 dpn[j].simple_ch_prep_sm = true; 208 j++; 209 } 210 211 prop->simple_clk_stop_capable = true; 212 213 /* wake-up event */ 214 prop->wake_capable = 0; 215 216 return 0; 217 } 218 219 static int sdw_mockup_bus_config(struct sdw_slave *slave, 220 struct sdw_bus_params *params) 221 { 222 return 0; 223 } 224 225 static int sdw_mockup_interrupt_callback(struct sdw_slave *slave, 226 struct sdw_slave_intr_status *status) 227 { 228 return 0; 229 } 230 231 static const struct sdw_slave_ops sdw_mockup_slave_ops = { 232 .read_prop = sdw_mockup_read_prop, 233 .interrupt_callback = sdw_mockup_interrupt_callback, 234 .update_status = sdw_mockup_update_status, 235 .bus_config = sdw_mockup_bus_config, 236 }; 237 238 static int sdw_mockup_sdw_probe(struct sdw_slave *slave, 239 const struct sdw_device_id *id) 240 { 241 struct device *dev = &slave->dev; 242 struct sdw_mockup_priv *sdw_mockup; 243 int ret; 244 245 sdw_mockup = devm_kzalloc(dev, sizeof(*sdw_mockup), GFP_KERNEL); 246 if (!sdw_mockup) 247 return -ENOMEM; 248 249 dev_set_drvdata(dev, sdw_mockup); 250 sdw_mockup->slave = slave; 251 252 slave->is_mockup_device = true; 253 254 ret = devm_snd_soc_register_component(dev, 255 &snd_soc_sdw_mockup_component, 256 sdw_mockup_dai, 257 ARRAY_SIZE(sdw_mockup_dai)); 258 259 return ret; 260 } 261 262 static int sdw_mockup_sdw_remove(struct sdw_slave *slave) 263 { 264 return 0; 265 } 266 267 /* 268 * Intel reserved parts ID with the following mapping expected: 269 * 0xAAAA: generic full-duplex codec 270 * 0xAA55: headset codec (mock-up of RT711/RT5682) - full-duplex 271 * 0x55AA: amplifier (mock-up of RT1308/Maxim 98373) - playback only with 272 * IV feedback 273 * 0x5555: mic codec (mock-up of RT715) - capture-only 274 */ 275 static const struct sdw_device_id sdw_mockup_id[] = { 276 SDW_SLAVE_ENTRY_EXT(0x0105, 0xAAAA, 0x0, 0, 0), 277 SDW_SLAVE_ENTRY_EXT(0x0105, 0xAA55, 0x0, 0, 0), 278 SDW_SLAVE_ENTRY_EXT(0x0105, 0x55AA, 0x0, 0, 0), 279 SDW_SLAVE_ENTRY_EXT(0x0105, 0x5555, 0x0, 0, 0), 280 {}, 281 }; 282 MODULE_DEVICE_TABLE(sdw, sdw_mockup_id); 283 284 static struct sdw_driver sdw_mockup_sdw_driver = { 285 .driver = { 286 .name = "sdw-mockup", 287 .owner = THIS_MODULE, 288 }, 289 .probe = sdw_mockup_sdw_probe, 290 .remove = sdw_mockup_sdw_remove, 291 .ops = &sdw_mockup_slave_ops, 292 .id_table = sdw_mockup_id, 293 }; 294 module_sdw_driver(sdw_mockup_sdw_driver); 295 296 MODULE_DESCRIPTION("ASoC SDW mockup codec driver"); 297 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>"); 298 MODULE_LICENSE("GPL"); 299