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1// SPDX-License-Identifier: GPL-2.0-only2// Copyright (c) 2015-2019 Intel Corporation3 4#include <linux/acpi.h>5#include <sound/intel-nhlt.h>6 7struct 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}21EXPORT_SYMBOL_GPL(intel_nhlt_init);22 23void intel_nhlt_free(struct nhlt_acpi_table *nhlt)24{25 acpi_put_table((struct acpi_table_header *)nhlt);26}27EXPORT_SYMBOL_GPL(intel_nhlt_free);28 29int 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}117EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);118 119bool 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}136EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);137 138int 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}158EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask);159 160#define SSP_BLOB_V1_0_SIZE 84161#define SSP_BLOB_V1_0_MDIVC_OFFSET 19 /* offset in u32 */162 163#define SSP_BLOB_V1_5_SIZE 96164#define SSP_BLOB_V1_5_MDIVC_OFFSET 21 /* offset in u32 */165#define SSP_BLOB_VER_1_5 0xEE000105166 167#define SSP_BLOB_V2_0_SIZE 88168#define SSP_BLOB_V2_0_MDIVC_OFFSET 20 /* offset in u32 */169#define SSP_BLOB_VER_2_0 0xEE000200170 171int 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 to195 * double-check that the configuration is consistent196 */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}237EXPORT_SYMBOL(intel_nhlt_ssp_mclk_mask);238 239static struct nhlt_specific_cfg *240nhlt_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 vbps260 * from NHLT table when ignore_vbps is true261 */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 272static 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 289struct nhlt_specific_cfg *290intel_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 sample309 * 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 vbps312 * specified as 32 while some uses 24.313 * The format these variations describe are identical, the314 * 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 no317 * 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}345EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);346 347int 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}371EXPORT_SYMBOL(intel_nhlt_ssp_device_type);372