Linux 4.15.6
[linux/fpc-iii.git] / sound / soc / intel / skylake / skl-nhlt.c
blob26b0a5caea5ab75707bf8461082e18524e80d816
1 /*
2 * skl-nhlt.c - Intel SKL Platform NHLT parsing
4 * Copyright (C) 2015 Intel Corp
5 * Author: Sanjiv Kumar <sanjiv.kumar@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
17 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 #include <linux/pci.h>
21 #include "skl.h"
23 #define NHLT_ACPI_HEADER_SIG "NHLT"
25 /* Unique identification for getting NHLT blobs */
26 static guid_t osc_guid =
27 GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
28 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
30 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
32 acpi_handle handle;
33 union acpi_object *obj;
34 struct nhlt_resource_desc *nhlt_ptr = NULL;
35 struct nhlt_acpi_table *nhlt_table = NULL;
37 handle = ACPI_HANDLE(dev);
38 if (!handle) {
39 dev_err(dev, "Didn't find ACPI_HANDLE\n");
40 return NULL;
43 obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL);
44 if (obj && obj->type == ACPI_TYPE_BUFFER) {
45 nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer;
46 if (nhlt_ptr->length)
47 nhlt_table = (struct nhlt_acpi_table *)
48 memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
49 MEMREMAP_WB);
50 ACPI_FREE(obj);
51 if (nhlt_table && (strncmp(nhlt_table->header.signature,
52 NHLT_ACPI_HEADER_SIG,
53 strlen(NHLT_ACPI_HEADER_SIG)) != 0)) {
54 memunmap(nhlt_table);
55 dev_err(dev, "NHLT ACPI header signature incorrect\n");
56 return NULL;
58 return nhlt_table;
61 dev_err(dev, "device specific method to extract NHLT blob failed\n");
62 return NULL;
65 void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
67 memunmap((void *) nhlt);
70 static struct nhlt_specific_cfg *skl_get_specific_cfg(
71 struct device *dev, struct nhlt_fmt *fmt,
72 u8 no_ch, u32 rate, u16 bps, u8 linktype)
74 struct nhlt_specific_cfg *sp_config;
75 struct wav_fmt *wfmt;
76 struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
77 int i;
79 dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);
81 for (i = 0; i < fmt->fmt_count; i++) {
82 wfmt = &fmt_config->fmt_ext.fmt;
83 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
84 wfmt->bits_per_sample, wfmt->samples_per_sec);
85 if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
87 * if link type is dmic ignore rate check as the blob is
88 * generic for all rates
90 sp_config = &fmt_config->config;
91 if (linktype == NHLT_LINK_DMIC)
92 return sp_config;
94 if (wfmt->samples_per_sec == rate)
95 return sp_config;
98 fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
99 fmt_config->config.size);
102 return NULL;
105 static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
106 u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
108 dev_dbg(dev, "Input configuration\n");
109 dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
110 dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
111 dev_dbg(dev, "bits_per_sample=%d\n", bps);
114 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
115 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
117 dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
118 epnt->virtual_bus_id, epnt->linktype,
119 epnt->direction, epnt->device_type);
121 if ((epnt->virtual_bus_id == instance_id) &&
122 (epnt->linktype == link_type) &&
123 (epnt->direction == dirn)) {
124 /* do not check dev_type for DMIC link type */
125 if (epnt->linktype == NHLT_LINK_DMIC)
126 return true;
128 if (epnt->device_type == dev_type)
129 return true;
132 return false;
135 struct nhlt_specific_cfg
136 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
137 u8 s_fmt, u8 num_ch, u32 s_rate,
138 u8 dirn, u8 dev_type)
140 struct nhlt_fmt *fmt;
141 struct nhlt_endpoint *epnt;
142 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
143 struct device *dev = bus->dev;
144 struct nhlt_specific_cfg *sp_config;
145 struct nhlt_acpi_table *nhlt = skl->nhlt;
146 u16 bps = (s_fmt == 16) ? 16 : 32;
147 u8 j;
149 dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
151 epnt = (struct nhlt_endpoint *)nhlt->desc;
153 dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
155 for (j = 0; j < nhlt->endpoint_count; j++) {
156 if (skl_check_ep_match(dev, epnt, instance, link_type,
157 dirn, dev_type)) {
158 fmt = (struct nhlt_fmt *)(epnt->config.caps +
159 epnt->config.size);
160 sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
161 s_rate, bps, link_type);
162 if (sp_config)
163 return sp_config;
166 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
169 return NULL;
172 int skl_get_dmic_geo(struct skl *skl)
174 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
175 struct nhlt_endpoint *epnt;
176 struct nhlt_dmic_array_config *cfg;
177 struct device *dev = &skl->pci->dev;
178 unsigned int dmic_geo = 0;
179 u8 j;
181 epnt = (struct nhlt_endpoint *)nhlt->desc;
183 for (j = 0; j < nhlt->endpoint_count; j++) {
184 if (epnt->linktype == NHLT_LINK_DMIC) {
185 cfg = (struct nhlt_dmic_array_config *)
186 (epnt->config.caps);
187 switch (cfg->array_type) {
188 case NHLT_MIC_ARRAY_2CH_SMALL:
189 case NHLT_MIC_ARRAY_2CH_BIG:
190 dmic_geo |= MIC_ARRAY_2CH;
191 break;
193 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
194 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
195 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
196 dmic_geo |= MIC_ARRAY_4CH;
197 break;
199 default:
200 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
201 cfg->array_type);
205 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
208 return dmic_geo;
211 static void skl_nhlt_trim_space(char *trim)
213 char *s = trim;
214 int cnt;
215 int i;
217 cnt = 0;
218 for (i = 0; s[i]; i++) {
219 if (!isspace(s[i]))
220 s[cnt++] = s[i];
223 s[cnt] = '\0';
226 int skl_nhlt_update_topology_bin(struct skl *skl)
228 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
229 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
230 struct device *dev = bus->dev;
232 dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
233 nhlt->header.oem_id, nhlt->header.oem_table_id,
234 nhlt->header.oem_revision);
236 snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
237 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
238 nhlt->header.oem_revision, "-tplg.bin");
240 skl_nhlt_trim_space(skl->tplg_name);
242 return 0;
245 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
246 struct device_attribute *attr, char *buf)
248 struct pci_dev *pci = to_pci_dev(dev);
249 struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
250 struct skl *skl = ebus_to_skl(ebus);
251 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
252 char platform_id[32];
254 sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
255 nhlt->header.oem_id, nhlt->header.oem_table_id,
256 nhlt->header.oem_revision);
258 skl_nhlt_trim_space(platform_id);
259 return sprintf(buf, "%s\n", platform_id);
262 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
264 int skl_nhlt_create_sysfs(struct skl *skl)
266 struct device *dev = &skl->pci->dev;
268 if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
269 dev_warn(dev, "Error creating sysfs entry\n");
271 return 0;
274 void skl_nhlt_remove_sysfs(struct skl *skl)
276 struct device *dev = &skl->pci->dev;
278 sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);