1 // SPDX-License-Identifier: GPL-2.0-only 2 // Copyright (c) 2015-2019 Intel Corporation 3 4 #include <linux/acpi.h> 5 #include <sound/intel-nhlt.h> 6 7 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) 8 { 9 struct nhlt_acpi_table *nhlt; 10 acpi_status status; 11 12 status = acpi_get_table(ACPI_SIG_NHLT, 0, 13 (struct acpi_table_header **)&nhlt); 14 if (ACPI_FAILURE(status)) { 15 dev_warn(dev, "NHLT table not found\n"); 16 return NULL; 17 } 18 19 return nhlt; 20 } 21 EXPORT_SYMBOL_GPL(intel_nhlt_init); 22 23 void intel_nhlt_free(struct nhlt_acpi_table *nhlt) 24 { 25 acpi_put_table((struct acpi_table_header *)nhlt); 26 } 27 EXPORT_SYMBOL_GPL(intel_nhlt_free); 28 29 int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) 30 { 31 struct nhlt_endpoint *epnt; 32 struct nhlt_dmic_array_config *cfg; 33 struct nhlt_vendor_dmic_array_config *cfg_vendor; 34 struct nhlt_fmt *fmt_configs; 35 unsigned int dmic_geo = 0; 36 u16 max_ch = 0; 37 u8 i, j; 38 39 if (!nhlt) 40 return 0; 41 42 if (nhlt->header.length <= sizeof(struct acpi_table_header)) { 43 dev_warn(dev, "Invalid DMIC description table\n"); 44 return 0; 45 } 46 47 for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++, 48 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) { 49 50 if (epnt->linktype != NHLT_LINK_DMIC) 51 continue; 52 53 cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps); 54 fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); 55 56 /* find max number of channels based on format_configuration */ 57 if (fmt_configs->fmt_count) { 58 struct nhlt_fmt_cfg *fmt_cfg = fmt_configs->fmt_config; 59 60 dev_dbg(dev, "found %d format definitions\n", 61 fmt_configs->fmt_count); 62 63 for (i = 0; i < fmt_configs->fmt_count; i++) { 64 struct wav_fmt_ext *fmt_ext; 65 66 fmt_ext = &fmt_cfg->fmt_ext; 67 68 if (fmt_ext->fmt.channels > max_ch) 69 max_ch = fmt_ext->fmt.channels; 70 71 /* Move to the next nhlt_fmt_cfg */ 72 fmt_cfg = (struct nhlt_fmt_cfg *)(fmt_cfg->config.caps + 73 fmt_cfg->config.size); 74 } 75 dev_dbg(dev, "max channels found %d\n", max_ch); 76 } else { 77 dev_dbg(dev, "No format information found\n"); 78 } 79 80 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) { 81 dmic_geo = max_ch; 82 } else { 83 switch (cfg->array_type) { 84 case NHLT_MIC_ARRAY_2CH_SMALL: 85 case NHLT_MIC_ARRAY_2CH_BIG: 86 dmic_geo = MIC_ARRAY_2CH; 87 break; 88 89 case NHLT_MIC_ARRAY_4CH_1ST_GEOM: 90 case NHLT_MIC_ARRAY_4CH_L_SHAPED: 91 case NHLT_MIC_ARRAY_4CH_2ND_GEOM: 92 dmic_geo = MIC_ARRAY_4CH; 93 break; 94 case NHLT_MIC_ARRAY_VENDOR_DEFINED: 95 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg; 96 dmic_geo = cfg_vendor->nb_mics; 97 break; 98 default: 99 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n", 100 __func__, cfg->array_type); 101 } 102 103 if (dmic_geo > 0) { 104 dev_dbg(dev, "Array with %d dmics\n", dmic_geo); 105 } 106 if (max_ch > dmic_geo) { 107 dev_dbg(dev, "max channels %d exceed dmic number %d\n", 108 max_ch, dmic_geo); 109 } 110 } 111 } 112 113 dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch); 114 115 return dmic_geo; 116 } 117 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo); 118 119 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type) 120 { 121 struct nhlt_endpoint *epnt; 122 int i; 123 124 if (!nhlt) 125 return false; 126 127 epnt = (struct nhlt_endpoint *)nhlt->desc; 128 for (i = 0; i < nhlt->endpoint_count; i++) { 129 if (epnt->linktype == link_type) 130 return true; 131 132 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 133 } 134 return false; 135 } 136 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type); 137 138 int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type) 139 { 140 struct nhlt_endpoint *epnt; 141 int ssp_mask = 0; 142 int i; 143 144 if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S)) 145 return 0; 146 147 epnt = (struct nhlt_endpoint *)nhlt->desc; 148 for (i = 0; i < nhlt->endpoint_count; i++) { 149 if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) { 150 /* for SSP the virtual bus id is the SSP port */ 151 ssp_mask |= BIT(epnt->virtual_bus_id); 152 } 153 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 154 } 155 156 return ssp_mask; 157 } 158 EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask); 159 160 #define SSP_BLOB_V1_0_SIZE 84 161 #define SSP_BLOB_V1_0_MDIVC_OFFSET 19 /* offset in u32 */ 162 163 #define SSP_BLOB_V1_5_SIZE 96 164 #define SSP_BLOB_V1_5_MDIVC_OFFSET 21 /* offset in u32 */ 165 #define SSP_BLOB_VER_1_5 0xEE000105 166 167 #define SSP_BLOB_V2_0_SIZE 88 168 #define SSP_BLOB_V2_0_MDIVC_OFFSET 20 /* offset in u32 */ 169 #define SSP_BLOB_VER_2_0 0xEE000200 170 171 int intel_nhlt_ssp_mclk_mask(struct nhlt_acpi_table *nhlt, int ssp_num) 172 { 173 struct nhlt_endpoint *epnt; 174 struct nhlt_fmt *fmt; 175 struct nhlt_fmt_cfg *cfg; 176 int mclk_mask = 0; 177 int i, j; 178 179 if (!nhlt) 180 return 0; 181 182 epnt = (struct nhlt_endpoint *)nhlt->desc; 183 for (i = 0; i < nhlt->endpoint_count; i++) { 184 185 /* we only care about endpoints connected to an audio codec over SSP */ 186 if (epnt->linktype == NHLT_LINK_SSP && 187 epnt->device_type == NHLT_DEVICE_I2S && 188 epnt->virtual_bus_id == ssp_num) { 189 190 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); 191 cfg = fmt->fmt_config; 192 193 /* 194 * In theory all formats should use the same MCLK but it doesn't hurt to 195 * double-check that the configuration is consistent 196 */ 197 for (j = 0; j < fmt->fmt_count; j++) { 198 u32 *blob; 199 int mdivc_offset; 200 int size; 201 202 /* first check we have enough data to read the blob type */ 203 if (cfg->config.size < 8) 204 return -EINVAL; 205 206 blob = (u32 *)cfg->config.caps; 207 208 if (blob[1] == SSP_BLOB_VER_2_0) { 209 mdivc_offset = SSP_BLOB_V2_0_MDIVC_OFFSET; 210 size = SSP_BLOB_V2_0_SIZE; 211 } else if (blob[1] == SSP_BLOB_VER_1_5) { 212 mdivc_offset = SSP_BLOB_V1_5_MDIVC_OFFSET; 213 size = SSP_BLOB_V1_5_SIZE; 214 } else { 215 mdivc_offset = SSP_BLOB_V1_0_MDIVC_OFFSET; 216 size = SSP_BLOB_V1_0_SIZE; 217 } 218 219 /* make sure we have enough data for the fixed part of the blob */ 220 if (cfg->config.size < size) 221 return -EINVAL; 222 223 mclk_mask |= blob[mdivc_offset] & GENMASK(1, 0); 224 225 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size); 226 } 227 } 228 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 229 } 230 231 /* make sure only one MCLK is used */ 232 if (hweight_long(mclk_mask) != 1) 233 return -EINVAL; 234 235 return mclk_mask; 236 } 237 EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask); 238 239 static struct nhlt_specific_cfg * 240 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch, 241 u32 rate, u8 vbps, u8 bps, bool ignore_vbps) 242 { 243 struct nhlt_fmt_cfg *cfg = fmt->fmt_config; 244 struct wav_fmt *wfmt; 245 u16 _bps, _vbps; 246 int i; 247 248 dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count); 249 250 for (i = 0; i < fmt->fmt_count; i++) { 251 wfmt = &cfg->fmt_ext.fmt; 252 _bps = wfmt->bits_per_sample; 253 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample; 254 255 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n", 256 wfmt->channels, _vbps, _bps, wfmt->samples_per_sec); 257 258 /* 259 * When looking for exact match of configuration ignore the vbps 260 * from NHLT table when ignore_vbps is true 261 */ 262 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate && 263 (ignore_vbps || vbps == _vbps) && bps == _bps) 264 return &cfg->config; 265 266 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size); 267 } 268 269 return NULL; 270 } 271 272 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, 273 u32 bus_id, u8 link_type, u8 dir, u8 dev_type) 274 { 275 dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n", 276 epnt->virtual_bus_id, epnt->linktype, 277 epnt->direction, epnt->device_type); 278 279 if ((epnt->virtual_bus_id != bus_id) || 280 (epnt->linktype != link_type) || 281 (epnt->direction != dir)) 282 return false; 283 284 /* link of type DMIC bypasses device_type check */ 285 return epnt->linktype == NHLT_LINK_DMIC || 286 epnt->device_type == dev_type; 287 } 288 289 struct nhlt_specific_cfg * 290 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, 291 u32 bus_id, u8 link_type, u8 vbps, u8 bps, 292 u8 num_ch, u32 rate, u8 dir, u8 dev_type) 293 { 294 struct nhlt_specific_cfg *cfg; 295 struct nhlt_endpoint *epnt; 296 bool ignore_vbps = false; 297 struct nhlt_fmt *fmt; 298 int i; 299 300 if (!nhlt) 301 return NULL; 302 303 dev_dbg(dev, "Looking for configuration:\n"); 304 dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n", 305 bus_id, link_type, dir, dev_type); 306 if (link_type == NHLT_LINK_DMIC && bps == 32 && (vbps == 24 || vbps == 32)) { 307 /* 308 * The DMIC hardware supports only one type of 32 bits sample 309 * size, which is 24 bit sampling on the MSB side and bits[1:0] 310 * are used for indicating the channel number. 311 * It has been observed that some NHLT tables have the vbps 312 * specified as 32 while some uses 24. 313 * The format these variations describe are identical, the 314 * hardware is configured and behaves the same way. 315 * Note: when the samples assumed to be vbps=32 then the 'noise' 316 * introduced by the lower two bits (channel number) have no 317 * real life implication on audio quality. 318 */ 319 dev_dbg(dev, 320 " ch=%d fmt=%d rate=%d (vbps is ignored for DMIC 32bit format)\n", 321 num_ch, bps, rate); 322 ignore_vbps = true; 323 } else { 324 dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate); 325 } 326 dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count); 327 328 epnt = (struct nhlt_endpoint *)nhlt->desc; 329 330 for (i = 0; i < nhlt->endpoint_count; i++) { 331 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) { 332 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); 333 334 cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, 335 vbps, bps, ignore_vbps); 336 if (cfg) 337 return cfg; 338 } 339 340 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 341 } 342 343 return NULL; 344 } 345 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob); 346 347 int intel_nhlt_ssp_device_type(struct device *dev, struct nhlt_acpi_table *nhlt, 348 u8 virtual_bus_id) 349 { 350 struct nhlt_endpoint *epnt; 351 int i; 352 353 if (!nhlt) 354 return -EINVAL; 355 356 epnt = (struct nhlt_endpoint *)nhlt->desc; 357 for (i = 0; i < nhlt->endpoint_count; i++) { 358 /* for SSP link the virtual bus id is the SSP port number */ 359 if (epnt->linktype == NHLT_LINK_SSP && 360 epnt->virtual_bus_id == virtual_bus_id) { 361 dev_dbg(dev, "SSP%d: dev_type=%d\n", virtual_bus_id, 362 epnt->device_type); 363 return epnt->device_type; 364 } 365 366 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 367 } 368 369 return -EINVAL; 370 } 371 EXPORT_SYMBOL(intel_nhlt_ssp_device_type); 372