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 dev_dbg(dev, "found %d format definitions\n", 59 fmt_configs->fmt_count); 60 61 for (i = 0; i < fmt_configs->fmt_count; i++) { 62 struct wav_fmt_ext *fmt_ext; 63 64 fmt_ext = &fmt_configs->fmt_config[i].fmt_ext; 65 66 if (fmt_ext->fmt.channels > max_ch) 67 max_ch = fmt_ext->fmt.channels; 68 } 69 dev_dbg(dev, "max channels found %d\n", max_ch); 70 } else { 71 dev_dbg(dev, "No format information found\n"); 72 } 73 74 if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) { 75 dmic_geo = max_ch; 76 } else { 77 switch (cfg->array_type) { 78 case NHLT_MIC_ARRAY_2CH_SMALL: 79 case NHLT_MIC_ARRAY_2CH_BIG: 80 dmic_geo = MIC_ARRAY_2CH; 81 break; 82 83 case NHLT_MIC_ARRAY_4CH_1ST_GEOM: 84 case NHLT_MIC_ARRAY_4CH_L_SHAPED: 85 case NHLT_MIC_ARRAY_4CH_2ND_GEOM: 86 dmic_geo = MIC_ARRAY_4CH; 87 break; 88 case NHLT_MIC_ARRAY_VENDOR_DEFINED: 89 cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg; 90 dmic_geo = cfg_vendor->nb_mics; 91 break; 92 default: 93 dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n", 94 __func__, cfg->array_type); 95 } 96 97 if (dmic_geo > 0) { 98 dev_dbg(dev, "Array with %d dmics\n", dmic_geo); 99 } 100 if (max_ch > dmic_geo) { 101 dev_dbg(dev, "max channels %d exceed dmic number %d\n", 102 max_ch, dmic_geo); 103 } 104 } 105 } 106 107 dev_dbg(dev, "dmic number %d max_ch %d\n", dmic_geo, max_ch); 108 109 return dmic_geo; 110 } 111 EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo); 112 113 bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type) 114 { 115 struct nhlt_endpoint *epnt; 116 int i; 117 118 if (!nhlt) 119 return false; 120 121 epnt = (struct nhlt_endpoint *)nhlt->desc; 122 for (i = 0; i < nhlt->endpoint_count; i++) { 123 if (epnt->linktype == link_type) 124 return true; 125 126 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 127 } 128 return false; 129 } 130 EXPORT_SYMBOL(intel_nhlt_has_endpoint_type); 131 132 int intel_nhlt_ssp_endpoint_mask(struct nhlt_acpi_table *nhlt, u8 device_type) 133 { 134 struct nhlt_endpoint *epnt; 135 int ssp_mask = 0; 136 int i; 137 138 if (!nhlt || (device_type != NHLT_DEVICE_BT && device_type != NHLT_DEVICE_I2S)) 139 return 0; 140 141 epnt = (struct nhlt_endpoint *)nhlt->desc; 142 for (i = 0; i < nhlt->endpoint_count; i++) { 143 if (epnt->linktype == NHLT_LINK_SSP && epnt->device_type == device_type) { 144 /* for SSP the virtual bus id is the SSP port */ 145 ssp_mask |= BIT(epnt->virtual_bus_id); 146 } 147 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 148 } 149 150 return ssp_mask; 151 } 152 EXPORT_SYMBOL(intel_nhlt_ssp_endpoint_mask); 153 154 static struct nhlt_specific_cfg * 155 nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch, 156 u32 rate, u8 vbps, u8 bps) 157 { 158 struct nhlt_fmt_cfg *cfg = fmt->fmt_config; 159 struct wav_fmt *wfmt; 160 u16 _bps, _vbps; 161 int i; 162 163 dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count); 164 165 for (i = 0; i < fmt->fmt_count; i++) { 166 wfmt = &cfg->fmt_ext.fmt; 167 _bps = wfmt->bits_per_sample; 168 _vbps = cfg->fmt_ext.sample.valid_bits_per_sample; 169 170 dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n", 171 wfmt->channels, _vbps, _bps, wfmt->samples_per_sec); 172 173 if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate && 174 vbps == _vbps && bps == _bps) 175 return &cfg->config; 176 177 cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size); 178 } 179 180 return NULL; 181 } 182 183 static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, 184 u32 bus_id, u8 link_type, u8 dir, u8 dev_type) 185 { 186 dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n", 187 epnt->virtual_bus_id, epnt->linktype, 188 epnt->direction, epnt->device_type); 189 190 if ((epnt->virtual_bus_id != bus_id) || 191 (epnt->linktype != link_type) || 192 (epnt->direction != dir)) 193 return false; 194 195 /* link of type DMIC bypasses device_type check */ 196 return epnt->linktype == NHLT_LINK_DMIC || 197 epnt->device_type == dev_type; 198 } 199 200 struct nhlt_specific_cfg * 201 intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt, 202 u32 bus_id, u8 link_type, u8 vbps, u8 bps, 203 u8 num_ch, u32 rate, u8 dir, u8 dev_type) 204 { 205 struct nhlt_specific_cfg *cfg; 206 struct nhlt_endpoint *epnt; 207 struct nhlt_fmt *fmt; 208 int i; 209 210 if (!nhlt) 211 return NULL; 212 213 dev_dbg(dev, "Looking for configuration:\n"); 214 dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n", 215 bus_id, link_type, dir, dev_type); 216 dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate); 217 dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count); 218 219 epnt = (struct nhlt_endpoint *)nhlt->desc; 220 221 for (i = 0; i < nhlt->endpoint_count; i++) { 222 if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) { 223 fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size); 224 225 cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps); 226 if (cfg) 227 return cfg; 228 } 229 230 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 231 } 232 233 return NULL; 234 } 235 EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob); 236