sound/soc/intel/skylake/skl-nhlt.c

   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 #define NHLT_ACPI_HEADER_SIG    "NHLT"
  24
  25 /* Unique identification for getting NHLT blobs */
  26 static guid_t osc_guid =
  27         GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
  28                   0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
  29
  30 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
  31 {
  32         acpi_handle handle;
  33         union acpi_object *obj;
  34         struct nhlt_resource_desc  *nhlt_ptr = NULL;
  35         struct nhlt_acpi_table *nhlt_table = NULL;
  36
  37         handle = ACPI_HANDLE(dev);
  38         if (!handle) {
  39                 dev_err(dev, "Didn't find ACPI_HANDLE\n");
  40                 return NULL;
  41         }
  42
  43         obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL);
  44         if (obj && obj->type == ACPI_TYPE_BUFFER) {
  45                 nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
  46                 nhlt_table = (struct nhlt_acpi_table *)
  47                                 memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
  48                                 MEMREMAP_WB);
  49                 ACPI_FREE(obj);
  50                 if (nhlt_table && (strncmp(nhlt_table->header.signature,
  51                                         NHLT_ACPI_HEADER_SIG,
  52                                         strlen(NHLT_ACPI_HEADER_SIG)) != 0)) {
  53                         memunmap(nhlt_table);
  54                         dev_err(dev, "NHLT ACPI header signature incorrect\n");
  55                         return NULL;
  56                 }
  57                 return nhlt_table;
  58         }
  59
  60         dev_err(dev, "device specific method to extract NHLT blob failed\n");
  61         return NULL;
  62 }
  63
  64 void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
  65 {
  66         memunmap((void *) nhlt);
  67 }
  68
  69 static struct nhlt_specific_cfg *skl_get_specific_cfg(
  70                 struct device *dev, struct nhlt_fmt *fmt,
  71                 u8 no_ch, u32 rate, u16 bps, u8 linktype)
  72 {
  73         struct nhlt_specific_cfg *sp_config;
  74         struct wav_fmt *wfmt;
  75         struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
  76         int i;
  77
  78         dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
  79
  80         for (i = 0; i < fmt->fmt_count; i++) {
  81                 wfmt = &fmt_config->fmt_ext.fmt;
  82                 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
  83                          wfmt->bits_per_sample, wfmt->samples_per_sec);
  84                 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
  85                         /*
  86                          * if link type is dmic ignore rate check as the blob is
  87                          * generic for all rates
  88                          */
  89                         sp_config = &fmt_config->config;
  90                         if (linktype == NHLT_LINK_DMIC)
  91                                 return sp_config;
  92
  93                         if (wfmt->samples_per_sec == rate)
  94                                 return sp_config;
  95                 }
  96
  97                 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
  98                                                 fmt_config->config.size);
  99         }
 100
 101         return NULL;
 102 }
 103
 104 static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
 105                 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
 106 {
 107         dev_dbg(dev, "Input configuration\n");
 108         dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
 109         dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
 110         dev_dbg(dev, "bits_per_sample=%d\n", bps);
 111 }
 112
 113 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
 114                 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
 115 {
 116         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
 117                         epnt->virtual_bus_id, epnt->linktype,
 118                         epnt->direction, epnt->device_type);
 119
 120         if ((epnt->virtual_bus_id == instance_id) &&
 121                         (epnt->linktype == link_type) &&
 122                         (epnt->direction == dirn) &&
 123                         (epnt->device_type == dev_type))
 124                 return true;
 125         else
 126                 return false;
 127 }
 128
 129 struct nhlt_specific_cfg
 130 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
 131                         u8 s_fmt, u8 num_ch, u32 s_rate,
 132                         u8 dirn, u8 dev_type)
 133 {
 134         struct nhlt_fmt *fmt;
 135         struct nhlt_endpoint *epnt;
 136         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 137         struct device *dev = bus->dev;
 138         struct nhlt_specific_cfg *sp_config;
 139         struct nhlt_acpi_table *nhlt = skl->nhlt;
 140         u16 bps = (s_fmt == 16) ? 16 : 32;
 141         u8 j;
 142
 143         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
 144
 145         epnt = (struct nhlt_endpoint *)nhlt->desc;
 146
 147         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 148
 149         for (j = 0; j < nhlt->endpoint_count; j++) {
 150                 if (skl_check_ep_match(dev, epnt, instance, link_type,
 151                                                 dirn, dev_type)) {
 152                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 153                                                  epnt->config.size);
 154                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 155                                                         s_rate, bps, link_type);
 156                         if (sp_config)
 157                                 return sp_config;
 158                 }
 159
 160                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 161         }
 162
 163         return NULL;
 164 }
 165
 166 int skl_get_dmic_geo(struct skl *skl)
 167 {
 168         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 169         struct nhlt_endpoint *epnt;
 170         struct nhlt_dmic_array_config *cfg;
 171         struct device *dev = &skl->pci->dev;
 172         unsigned int dmic_geo = 0;
 173         u8 j;
 174
 175         epnt = (struct nhlt_endpoint *)nhlt->desc;
 176
 177         for (j = 0; j < nhlt->endpoint_count; j++) {
 178                 if (epnt->linktype == NHLT_LINK_DMIC) {
 179                         cfg = (struct nhlt_dmic_array_config  *)
 180                                         (epnt->config.caps);
 181                         switch (cfg->array_type) {
 182                         case NHLT_MIC_ARRAY_2CH_SMALL:
 183                         case NHLT_MIC_ARRAY_2CH_BIG:
 184                                 dmic_geo |= MIC_ARRAY_2CH;
 185                                 break;
 186
 187                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
 188                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
 189                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
 190                                 dmic_geo |= MIC_ARRAY_4CH;
 191                                 break;
 192
 193                         default:
 194                                 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
 195                                                 cfg->array_type);
 196
 197                         }
 198                 }
 199                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 200         }
 201
 202         return dmic_geo;
 203 }
 204
 205 static void skl_nhlt_trim_space(char *trim)
 206 {
 207         char *s = trim;
 208         int cnt;
 209         int i;
 210
 211         cnt = 0;
 212         for (i = 0; s[i]; i++) {
 213                 if (!isspace(s[i]))
 214                         s[cnt++] = s[i];
 215         }
 216
 217         s[cnt] = '\0';
 218 }
 219
 220 int skl_nhlt_update_topology_bin(struct skl *skl)
 221 {
 222         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 223         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 224         struct device *dev = bus->dev;
 225
 226         dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
 227                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 228                 nhlt->header.oem_revision);
 229
 230         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
 231                 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
 232                 nhlt->header.oem_revision, "-tplg.bin");
 233
 234         skl_nhlt_trim_space(skl->tplg_name);
 235
 236         return 0;
 237 }
 238
 239 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
 240                         struct device_attribute *attr, char *buf)
 241 {
 242         struct pci_dev *pci = to_pci_dev(dev);
 243         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 244         struct skl *skl = ebus_to_skl(ebus);
 245         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 246         char platform_id[32];
 247
 248         sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
 249                         nhlt->header.oem_id, nhlt->header.oem_table_id,
 250                         nhlt->header.oem_revision);
 251
 252         skl_nhlt_trim_space(platform_id);
 253         return sprintf(buf, "%s\n", platform_id);
 254 }
 255
 256 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
 257
 258 int skl_nhlt_create_sysfs(struct skl *skl)
 259 {
 260         struct device *dev = &skl->pci->dev;
 261
 262         if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
 263                 dev_warn(dev, "Error creating sysfs entry\n");
 264
 265         return 0;
 266 }
 267
 268 void skl_nhlt_remove_sysfs(struct skl *skl)
 269 {
 270         struct device *dev = &skl->pci->dev;
 271
 272         sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
 273 }