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                 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)
 107 {
 108         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
 109                 epnt->virtual_bus_id, epnt->linktype, epnt->direction);
 110
 111         if ((epnt->virtual_bus_id == instance_id) &&
 112                         (epnt->linktype == link_type) &&
 113                         (epnt->direction == dirn))
 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, u8 dirn)
 122 {
 123         struct nhlt_fmt *fmt;
 124         struct nhlt_endpoint *epnt;
 125         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 126         struct device *dev = bus->dev;
 127         struct nhlt_specific_cfg *sp_config;
 128         struct nhlt_acpi_table *nhlt = skl->nhlt;
 129         u16 bps = (s_fmt == 16) ? 16 : 32;
 130         u8 j;
 131
 132         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
 133
 134         epnt = (struct nhlt_endpoint *)nhlt->desc;
 135
 136         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 137
 138         for (j = 0; j < nhlt->endpoint_count; j++) {
 139                 if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) {
 140                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 141                                                  epnt->config.size);
 142                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 143                                                         s_rate, bps, link_type);
 144                         if (sp_config)
 145                                 return sp_config;
 146                 }
 147
 148                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 149         }
 150
 151         return NULL;
 152 }
 153
 154 int skl_get_dmic_geo(struct skl *skl)
 155 {
 156         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 157         struct nhlt_endpoint *epnt;
 158         struct nhlt_dmic_array_config *cfg;
 159         struct device *dev = &skl->pci->dev;
 160         unsigned int dmic_geo = 0;
 161         u8 j;
 162
 163         epnt = (struct nhlt_endpoint *)nhlt->desc;
 164
 165         for (j = 0; j < nhlt->endpoint_count; j++) {
 166                 if (epnt->linktype == NHLT_LINK_DMIC) {
 167                         cfg = (struct nhlt_dmic_array_config  *)
 168                                         (epnt->config.caps);
 169                         switch (cfg->array_type) {
 170                         case NHLT_MIC_ARRAY_2CH_SMALL:
 171                         case NHLT_MIC_ARRAY_2CH_BIG:
 172                                 dmic_geo |= MIC_ARRAY_2CH;
 173                                 break;
 174
 175                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
 176                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
 177                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
 178                                 dmic_geo |= MIC_ARRAY_4CH;
 179                                 break;
 180
 181                         default:
 182                                 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
 183                                                 cfg->array_type);
 184
 185                         }
 186                 }
 187                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 188         }
 189
 190         return dmic_geo;
 191 }
 192
 193 static void skl_nhlt_trim_space(struct skl *skl)
 194 {
 195         char *s = skl->tplg_name;
 196         int cnt;
 197         int i;
 198
 199         cnt = 0;
 200         for (i = 0; s[i]; i++) {
 201                 if (!isspace(s[i]))
 202                         s[cnt++] = s[i];
 203         }
 204
 205         s[cnt] = '\0';
 206 }
 207
 208 int skl_nhlt_update_topology_bin(struct skl *skl)
 209 {
 210         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 211         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 212         struct device *dev = bus->dev;
 213
 214         dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n",
 215                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 216                 nhlt->header.oem_revision);
 217
 218         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "/*(DEBLOBBED)*/");
 219
 220         skl_nhlt_trim_space(skl);
 221
 222         return 0;
 223 }