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 static struct nhlt_specific_cfg * 161 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch, 162 u32 rate, u8 vbps, u8 bps) 163 { 164 struct nhlt_fmt_cfg *cfg = fmt->fmt_config; 165 struct wav_fmt *wfmt; 166 u16 _bps, _vbps; 167 int i; 168 169 dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count); 170 171 for (i = 0; i < fmt->fmt_count; i++) { 172 wfmt = &cfg->fmt_ext.fmt; 173 _bps = wfmt->bits_per_sample; 174 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample; 175 176 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n", 177 wfmt->channels, _vbps, _bps, wfmt->samples_per_sec); 178 179 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate && 180 vbps == _vbps && bps == _bps) 181 return &cfg->config; 182 183 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size); 184 } 185 186 return NULL; 187 } 188 189 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, 190 u32 bus_id, u8 link_type, u8 dir, u8 dev_type) 191 { 192 dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n", 193 epnt->virtual_bus_id, epnt->linktype, 194 epnt->direction, epnt->device_type); 195 196 if ((epnt->virtual_bus_id != bus_id) || 197 (epnt->linktype != link_type) || 198 (epnt->direction != dir)) 199 return false; 200 201 /* link of type DMIC bypasses device_type check */ 202 return epnt->linktype == NHLT_LINK_DMIC || 203 epnt->device_type == dev_type; 204 } 205 206 struct nhlt_specific_cfg * 207 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, 208 u32 bus_id, u8 link_type, u8 vbps, u8 bps, 209 u8 num_ch, u32 rate, u8 dir, u8 dev_type) 210 { 211 struct nhlt_specific_cfg *cfg; 212 struct nhlt_endpoint *epnt; 213 struct nhlt_fmt *fmt; 214 int i; 215 216 if (!nhlt) 217 return NULL; 218 219 dev_dbg(dev, "Looking for configuration:\n"); 220 dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n", 221 bus_id, link_type, dir, dev_type); 222 dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate); 223 dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count); 224 225 epnt = (struct nhlt_endpoint *)nhlt->desc; 226 227 for (i = 0; i < nhlt->endpoint_count; i++) { 228 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) { 229 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); 230 231 cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps); 232 if (cfg) 233 return cfg; 234 } 235 236 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 237 } 238 239 return NULL; 240 } 241 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob); 242