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