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 u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
  25                                 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
  26
  27 #define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS"
  28
  29 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
  30 {
  31         acpi_handle handle;
  32         union acpi_object *obj;
  33         struct nhlt_resource_desc  *nhlt_ptr = NULL;
  34         struct nhlt_acpi_table *nhlt_table = NULL;
  35
  36         if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) {
  37                 dev_err(dev, "Requested NHLT device not found\n");
  38                 return NULL;
  39         }
  40
  41         obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
  42         if (obj && obj->type == ACPI_TYPE_BUFFER) {
  43                 nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
  44                 nhlt_table = (struct nhlt_acpi_table *)
  45                                 memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
  46                                 MEMREMAP_WB);
  47                 ACPI_FREE(obj);
  48                 return nhlt_table;
  49         }
  50
  51         dev_err(dev, "device specific method to extract NHLT blob failed\n");
  52         return NULL;
  53 }
  54
  55 void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
  56 {
  57         memunmap((void *) nhlt);
  58 }
  59
  60 static struct nhlt_specific_cfg *skl_get_specific_cfg(
  61                 struct device *dev, struct nhlt_fmt *fmt,
  62                 u8 no_ch, u32 rate, u16 bps, u8 linktype)
  63 {
  64         struct nhlt_specific_cfg *sp_config;
  65         struct wav_fmt *wfmt;
  66         struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
  67         int i;
  68
  69         dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
  70
  71         for (i = 0; i < fmt->fmt_count; i++) {
  72                 wfmt = &fmt_config->fmt_ext.fmt;
  73                 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
  74                          wfmt->bits_per_sample, wfmt->samples_per_sec);
  75                 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
  76                         /*
  77                          * if link type is dmic ignore rate check as the blob is
  78                          * generic for all rates
  79                          */
  80                         sp_config = &fmt_config->config;
  81                         if (linktype == NHLT_LINK_DMIC)
  82                                 return sp_config;
  83
  84                         if (wfmt->samples_per_sec == rate)
  85                                 return sp_config;
  86                 }
  87
  88                 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
  89                                                 fmt_config->config.size);
  90         }
  91
  92         return NULL;
  93 }
  94
  95 static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
  96                 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
  97 {
  98         dev_dbg(dev, "Input configuration\n");
  99         dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
 100         dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
 101         dev_dbg(dev, "bits_per_sample=%d\n", bps);
 102 }
 103
 104 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
 105                                 u32 instance_id, u8 link_type, u8 dirn)
 106 {
 107         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
 108                 epnt->virtual_bus_id, epnt->linktype, epnt->direction);
 109
 110         if ((epnt->virtual_bus_id == instance_id) &&
 111                         (epnt->linktype == link_type) &&
 112                         (epnt->direction == dirn))
 113                 return true;
 114         else
 115                 return false;
 116 }
 117
 118 struct nhlt_specific_cfg
 119 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
 120                         u8 s_fmt, u8 num_ch, u32 s_rate, u8 dirn)
 121 {
 122         struct nhlt_fmt *fmt;
 123         struct nhlt_endpoint *epnt;
 124         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 125         struct device *dev = bus->dev;
 126         struct nhlt_specific_cfg *sp_config;
 127         struct nhlt_acpi_table *nhlt = skl->nhlt;
 128         u16 bps = (s_fmt == 16) ? 16 : 32;
 129         u8 j;
 130
 131         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
 132
 133         epnt = (struct nhlt_endpoint *)nhlt->desc;
 134
 135         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 136
 137         for (j = 0; j < nhlt->endpoint_count; j++) {
 138                 if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) {
 139                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 140                                                  epnt->config.size);
 141                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 142                                                         s_rate, bps, link_type);
 143                         if (sp_config)
 144                                 return sp_config;
 145                 }
 146
 147                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 148         }
 149
 150         return NULL;
 151 }
 152
 153 int skl_get_dmic_geo(struct skl *skl)
 154 {
 155         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 156         struct nhlt_endpoint *epnt;
 157         struct nhlt_dmic_array_config *cfg;
 158         struct device *dev = &skl->pci->dev;
 159         unsigned int dmic_geo = 0;
 160         u8 j;
 161
 162         epnt = (struct nhlt_endpoint *)nhlt->desc;
 163
 164         for (j = 0; j < nhlt->endpoint_count; j++) {
 165                 if (epnt->linktype == NHLT_LINK_DMIC) {
 166                         cfg = (struct nhlt_dmic_array_config  *)
 167                                         (epnt->config.caps);
 168                         switch (cfg->array_type) {
 169                         case NHLT_MIC_ARRAY_2CH_SMALL:
 170                         case NHLT_MIC_ARRAY_2CH_BIG:
 171                                 dmic_geo |= MIC_ARRAY_2CH;
 172                                 break;
 173
 174                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
 175                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
 176                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
 177                                 dmic_geo |= MIC_ARRAY_4CH;
 178                                 break;
 179
 180                         default:
 181                                 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
 182                                                 cfg->array_type);
 183
 184                         }
 185                 }
 186                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 187         }
 188
 189         return dmic_geo;
 190 }
 191
 192 static void skl_nhlt_trim_space(struct skl *skl)
 193 {
 194         char *s = skl->tplg_name;
 195         int cnt;
 196         int i;
 197
 198         cnt = 0;
 199         for (i = 0; s[i]; i++) {
 200                 if (!isspace(s[i]))
 201                         s[cnt++] = s[i];
 202         }
 203
 204         s[cnt] = '\0';
 205 }
 206
 207 int skl_nhlt_update_topology_bin(struct skl *skl)
 208 {
 209         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 210         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 211         struct device *dev = bus->dev;
 212
 213         dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
 214                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 215                 nhlt->header.oem_revision);
 216
 217         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
 218                 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
 219                 nhlt->header.oem_revision, "-tplg.bin");
 220
 221         skl_nhlt_trim_space(skl);
 222
 223         return 0;
 224 }