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, u8 dev_type)
 106 {
 107         dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
 108                         epnt->virtual_bus_id, epnt->linktype,
 109                         epnt->direction, epnt->device_type);
 110
 111         if ((epnt->virtual_bus_id == instance_id) &&
 112                         (epnt->linktype == link_type) &&
 113                         (epnt->direction == dirn) &&
 114                         (epnt->device_type == dev_type))
 115                 return true;
 116         else
 117                 return false;
 118 }
 119
 120 struct nhlt_specific_cfg
 121 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
 122                         u8 s_fmt, u8 num_ch, u32 s_rate,
 123                         u8 dirn, u8 dev_type)
 124 {
 125         struct nhlt_fmt *fmt;
 126         struct nhlt_endpoint *epnt;
 127         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 128         struct device *dev = bus->dev;
 129         struct nhlt_specific_cfg *sp_config;
 130         struct nhlt_acpi_table *nhlt = skl->nhlt;
 131         u16 bps = (s_fmt == 16) ? 16 : 32;
 132         u8 j;
 133
 134         dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
 135
 136         epnt = (struct nhlt_endpoint *)nhlt->desc;
 137
 138         dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
 139
 140         for (j = 0; j < nhlt->endpoint_count; j++) {
 141                 if (skl_check_ep_match(dev, epnt, instance, link_type,
 142                                                 dirn, dev_type)) {
 143                         fmt = (struct nhlt_fmt *)(epnt->config.caps +
 144                                                  epnt->config.size);
 145                         sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
 146                                                         s_rate, bps, link_type);
 147                         if (sp_config)
 148                                 return sp_config;
 149                 }
 150
 151                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 152         }
 153
 154         return NULL;
 155 }
 156
 157 int skl_get_dmic_geo(struct skl *skl)
 158 {
 159         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 160         struct nhlt_endpoint *epnt;
 161         struct nhlt_dmic_array_config *cfg;
 162         struct device *dev = &skl->pci->dev;
 163         unsigned int dmic_geo = 0;
 164         u8 j;
 165
 166         epnt = (struct nhlt_endpoint *)nhlt->desc;
 167
 168         for (j = 0; j < nhlt->endpoint_count; j++) {
 169                 if (epnt->linktype == NHLT_LINK_DMIC) {
 170                         cfg = (struct nhlt_dmic_array_config  *)
 171                                         (epnt->config.caps);
 172                         switch (cfg->array_type) {
 173                         case NHLT_MIC_ARRAY_2CH_SMALL:
 174                         case NHLT_MIC_ARRAY_2CH_BIG:
 175                                 dmic_geo |= MIC_ARRAY_2CH;
 176                                 break;
 177
 178                         case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
 179                         case NHLT_MIC_ARRAY_4CH_L_SHAPED:
 180                         case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
 181                                 dmic_geo |= MIC_ARRAY_4CH;
 182                                 break;
 183
 184                         default:
 185                                 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
 186                                                 cfg->array_type);
 187
 188                         }
 189                 }
 190                 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
 191         }
 192
 193         return dmic_geo;
 194 }
 195
 196 static void skl_nhlt_trim_space(char *trim)
 197 {
 198         char *s = trim;
 199         int cnt;
 200         int i;
 201
 202         cnt = 0;
 203         for (i = 0; s[i]; i++) {
 204                 if (!isspace(s[i]))
 205                         s[cnt++] = s[i];
 206         }
 207
 208         s[cnt] = '\0';
 209 }
 210
 211 int skl_nhlt_update_topology_bin(struct skl *skl)
 212 {
 213         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 214         struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
 215         struct device *dev = bus->dev;
 216
 217         dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
 218                 nhlt->header.oem_id, nhlt->header.oem_table_id,
 219                 nhlt->header.oem_revision);
 220
 221         snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
 222                 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
 223                 nhlt->header.oem_revision, "-tplg.bin");
 224
 225         skl_nhlt_trim_space(skl->tplg_name);
 226
 227         return 0;
 228 }
 229
 230 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
 231                         struct device_attribute *attr, char *buf)
 232 {
 233         struct pci_dev *pci = to_pci_dev(dev);
 234         struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
 235         struct skl *skl = ebus_to_skl(ebus);
 236         struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
 237         char platform_id[32];
 238
 239         sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
 240                         nhlt->header.oem_id, nhlt->header.oem_table_id,
 241                         nhlt->header.oem_revision);
 242
 243         skl_nhlt_trim_space(platform_id);
 244         return sprintf(buf, "%s\n", platform_id);
 245 }
 246
 247 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
 248
 249 int skl_nhlt_create_sysfs(struct skl *skl)
 250 {
 251         struct device *dev = &skl->pci->dev;
 252
 253         if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
 254                 dev_warn(dev, "Error creating sysfs entry\n");
 255
 256         return 0;
 257 }
 258
 259 void skl_nhlt_remove_sysfs(struct skl *skl)
 260 {
 261         struct device *dev = &skl->pci->dev;
 262
 263         sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
 264 }