1 /* 2 * skl-nhlt.c - Intel SKL Platform NHLT parsing 3 * 4 * Copyright (C) 2015 Intel Corp 5 * Author: Sanjiv Kumar <sanjiv.kumar@intel.com> 6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; version 2 of the License. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 18 * 19 */ 20 #include <linux/pci.h> 21 #include "skl.h" 22 23 /* Unique identification for getting NHLT blobs */ 24 static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45, 25 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53}; 26 27 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev) 28 { 29 acpi_handle handle; 30 union acpi_object *obj; 31 struct nhlt_resource_desc *nhlt_ptr = NULL; 32 struct nhlt_acpi_table *nhlt_table = NULL; 33 34 handle = ACPI_HANDLE(dev); 35 if (!handle) { 36 dev_err(dev, "Didn't find ACPI_HANDLE\n"); 37 return NULL; 38 } 39 40 obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL); 41 if (obj && obj->type == ACPI_TYPE_BUFFER) { 42 nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; 43 nhlt_table = (struct nhlt_acpi_table *) 44 memremap(nhlt_ptr->min_addr, nhlt_ptr->length, 45 MEMREMAP_WB); 46 ACPI_FREE(obj); 47 return nhlt_table; 48 } 49 50 dev_err(dev, "device specific method to extract NHLT blob failed\n"); 51 return NULL; 52 } 53 54 void skl_nhlt_free(struct nhlt_acpi_table *nhlt) 55 { 56 memunmap((void *) nhlt); 57 } 58 59 static struct nhlt_specific_cfg *skl_get_specific_cfg( 60 struct device *dev, struct nhlt_fmt *fmt, 61 u8 no_ch, u32 rate, u16 bps, u8 linktype) 62 { 63 struct nhlt_specific_cfg *sp_config; 64 struct wav_fmt *wfmt; 65 struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config; 66 int i; 67 68 dev_dbg(dev, "Format count =%d\n", fmt->fmt_count); 69 70 for (i = 0; i < fmt->fmt_count; i++) { 71 wfmt = &fmt_config->fmt_ext.fmt; 72 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels, 73 wfmt->bits_per_sample, wfmt->samples_per_sec); 74 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) { 75 /* 76 * if link type is dmic ignore rate check as the blob is 77 * generic for all rates 78 */ 79 sp_config = &fmt_config->config; 80 if (linktype == NHLT_LINK_DMIC) 81 return sp_config; 82 83 if (wfmt->samples_per_sec == rate) 84 return sp_config; 85 } 86 87 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps + 88 fmt_config->config.size); 89 } 90 91 return NULL; 92 } 93 94 static void dump_config(struct device *dev, u32 instance_id, u8 linktype, 95 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps) 96 { 97 dev_dbg(dev, "Input configuration\n"); 98 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate); 99 dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype); 100 dev_dbg(dev, "bits_per_sample=%d\n", bps); 101 } 102 103 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt, 104 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type) 105 { 106 dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n", 107 epnt->virtual_bus_id, epnt->linktype, 108 epnt->direction, epnt->device_type); 109 110 if ((epnt->virtual_bus_id == instance_id) && 111 (epnt->linktype == link_type) && 112 (epnt->direction == dirn) && 113 (epnt->device_type == dev_type)) 114 return true; 115 else 116 return false; 117 } 118 119 struct nhlt_specific_cfg 120 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type, 121 u8 s_fmt, u8 num_ch, u32 s_rate, 122 u8 dirn, u8 dev_type) 123 { 124 struct nhlt_fmt *fmt; 125 struct nhlt_endpoint *epnt; 126 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus); 127 struct device *dev = bus->dev; 128 struct nhlt_specific_cfg *sp_config; 129 struct nhlt_acpi_table *nhlt = skl->nhlt; 130 u16 bps = (s_fmt == 16) ? 16 : 32; 131 u8 j; 132 133 dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps); 134 135 epnt = (struct nhlt_endpoint *)nhlt->desc; 136 137 dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count); 138 139 for (j = 0; j < nhlt->endpoint_count; j++) { 140 if (skl_check_ep_match(dev, epnt, instance, link_type, 141 dirn, dev_type)) { 142 fmt = (struct nhlt_fmt *)(epnt->config.caps + 143 epnt->config.size); 144 sp_config = skl_get_specific_cfg(dev, fmt, num_ch, 145 s_rate, bps, link_type); 146 if (sp_config) 147 return sp_config; 148 } 149 150 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 151 } 152 153 return NULL; 154 } 155 156 int skl_get_dmic_geo(struct skl *skl) 157 { 158 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; 159 struct nhlt_endpoint *epnt; 160 struct nhlt_dmic_array_config *cfg; 161 struct device *dev = &skl->pci->dev; 162 unsigned int dmic_geo = 0; 163 u8 j; 164 165 epnt = (struct nhlt_endpoint *)nhlt->desc; 166 167 for (j = 0; j < nhlt->endpoint_count; j++) { 168 if (epnt->linktype == NHLT_LINK_DMIC) { 169 cfg = (struct nhlt_dmic_array_config *) 170 (epnt->config.caps); 171 switch (cfg->array_type) { 172 case NHLT_MIC_ARRAY_2CH_SMALL: 173 case NHLT_MIC_ARRAY_2CH_BIG: 174 dmic_geo |= MIC_ARRAY_2CH; 175 break; 176 177 case NHLT_MIC_ARRAY_4CH_1ST_GEOM: 178 case NHLT_MIC_ARRAY_4CH_L_SHAPED: 179 case NHLT_MIC_ARRAY_4CH_2ND_GEOM: 180 dmic_geo |= MIC_ARRAY_4CH; 181 break; 182 183 default: 184 dev_warn(dev, "undefined DMIC array_type 0x%0x\n", 185 cfg->array_type); 186 187 } 188 } 189 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); 190 } 191 192 return dmic_geo; 193 } 194 195 static void skl_nhlt_trim_space(char *trim) 196 { 197 char *s = trim; 198 int cnt; 199 int i; 200 201 cnt = 0; 202 for (i = 0; s[i]; i++) { 203 if (!isspace(s[i])) 204 s[cnt++] = s[i]; 205 } 206 207 s[cnt] = '\0'; 208 } 209 210 int skl_nhlt_update_topology_bin(struct skl *skl) 211 { 212 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; 213 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus); 214 struct device *dev = bus->dev; 215 216 dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n", 217 nhlt->header.oem_id, nhlt->header.oem_table_id, 218 nhlt->header.oem_revision); 219 220 snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s", 221 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id, 222 nhlt->header.oem_revision, "-tplg.bin"); 223 224 skl_nhlt_trim_space(skl->tplg_name); 225 226 return 0; 227 } 228 229 static ssize_t skl_nhlt_platform_id_show(struct device *dev, 230 struct device_attribute *attr, char *buf) 231 { 232 struct pci_dev *pci = to_pci_dev(dev); 233 struct hdac_ext_bus *ebus = pci_get_drvdata(pci); 234 struct skl *skl = ebus_to_skl(ebus); 235 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt; 236 char platform_id[32]; 237 238 sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id, 239 nhlt->header.oem_id, nhlt->header.oem_table_id, 240 nhlt->header.oem_revision); 241 242 skl_nhlt_trim_space(platform_id); 243 return sprintf(buf, "%s\n", platform_id); 244 } 245 246 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL); 247 248 int skl_nhlt_create_sysfs(struct skl *skl) 249 { 250 struct device *dev = &skl->pci->dev; 251 252 if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr)) 253 dev_warn(dev, "Error creating sysfs entry\n"); 254 255 return 0; 256 } 257 258 void skl_nhlt_remove_sysfs(struct skl *skl) 259 { 260 struct device *dev = &skl->pci->dev; 261 262 sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr); 263 } 264