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 "skl.h"
  21
  22 /* Unique identification for getting NHLT blobs */
  23 static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
  24                                 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
  25
  26 #define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS"
  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         if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) {
  36                 dev_err(dev, "Requested NHLT device not found\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)
 105 {
 106         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
 107                 epnt->virtual_bus_id, epnt->linktype, epnt->direction);
 108
 109         if ((epnt->virtual_bus_id == instance_id) &&
 110                         (epnt->linktype == link_type) &&
 111                         (epnt->direction == dirn))
 112                 return true;
 113         else
 114                 return false;
 115 }
 116
 117 struct nhlt_specific_cfg
 118 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
 119                         u8 s_fmt, u8 num_ch, u32 s_rate, u8 dirn)
 120 {
 121         struct nhlt_fmt *fmt;
 122         struct nhlt_endpoint *epnt;
 123         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 124         struct device *dev = bus->dev;
 125         struct nhlt_specific_cfg *sp_config;
 126         struct nhlt_acpi_table *nhlt = skl->nhlt;
 127         u16 bps = (s_fmt == 16) ? 16 : 32;
 128         u8 j;
 129
 130         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
 131
 132         epnt = (struct nhlt_endpoint *)nhlt->desc;
 133
 134         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 135
 136         for (j = 0; j < nhlt->endpoint_count; j++) {
 137                 if (skl_check_ep_match(dev, epnt, instance, link_type, dirn)) {
 138                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 139                                                  epnt->config.size);
 140                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 141                                                         s_rate, bps, link_type);
 142                         if (sp_config)
 143                                 return sp_config;
 144                 }
 145
 146                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 147         }
 148
 149         return NULL;
 150 }
 151
 152 static void skl_nhlt_trim_space(struct skl *skl)
 153 {
 154         char *s = skl->tplg_name;
 155         int cnt;
 156         int i;
 157
 158         cnt = 0;
 159         for (i = 0; s[i]; i++) {
 160                 if (!isspace(s[i]))
 161                         s[cnt++] = s[i];
 162         }
 163
 164         s[cnt] = '\0';
 165 }
 166
 167 int skl_nhlt_update_topology_bin(struct skl *skl)
 168 {
 169         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 170         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 171         struct device *dev = bus->dev;
 172
 173         dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
 174                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 175                 nhlt->header.oem_revision);
 176
 177         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
 178                 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
 179                 nhlt->header.oem_revision, "-tplg.bin");
 180
 181         skl_nhlt_trim_space(skl);
 182
 183         return 0;
 184 }