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 guid_t osc_guid =
25 GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
26 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
27
skl_nhlt_init(struct device * dev)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 handle = ACPI_HANDLE(dev);
36 if (!handle) {
37 dev_err(dev, "Didn't find ACPI_HANDLE\n");
38 return NULL;
39 }
40
41 obj = acpi_evaluate_dsm(handle, &osc_guid, 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
skl_nhlt_free(struct nhlt_acpi_table * nhlt)56 void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
57 {
58 memunmap((void *) nhlt);
59 }
60
skl_get_specific_cfg(struct device * dev,struct nhlt_fmt * fmt,u8 no_ch,u32 rate,u16 bps,u8 linktype)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
dump_config(struct device * dev,u32 instance_id,u8 linktype,u8 s_fmt,u8 num_channels,u32 s_rate,u8 dirn,u16 bps)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
skl_check_ep_match(struct device * dev,struct nhlt_endpoint * epnt,u32 instance_id,u8 link_type,u8 dirn,u8 dev_type)105 static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
106 u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
107 {
108 dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
109 epnt->virtual_bus_id, epnt->linktype,
110 epnt->direction, epnt->device_type);
111
112 if ((epnt->virtual_bus_id == instance_id) &&
113 (epnt->linktype == link_type) &&
114 (epnt->direction == dirn) &&
115 (epnt->device_type == dev_type))
116 return true;
117 else
118 return false;
119 }
120
121 struct nhlt_specific_cfg
skl_get_ep_blob(struct skl * skl,u32 instance,u8 link_type,u8 s_fmt,u8 num_ch,u32 s_rate,u8 dirn,u8 dev_type)122 *skl_get_ep_blob(struct skl *skl, u32 instance, u8 link_type,
123 u8 s_fmt, u8 num_ch, u32 s_rate,
124 u8 dirn, u8 dev_type)
125 {
126 struct nhlt_fmt *fmt;
127 struct nhlt_endpoint *epnt;
128 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
129 struct device *dev = bus->dev;
130 struct nhlt_specific_cfg *sp_config;
131 struct nhlt_acpi_table *nhlt = skl->nhlt;
132 u16 bps = (s_fmt == 16) ? 16 : 32;
133 u8 j;
134
135 dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);
136
137 epnt = (struct nhlt_endpoint *)nhlt->desc;
138
139 dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);
140
141 for (j = 0; j < nhlt->endpoint_count; j++) {
142 if (skl_check_ep_match(dev, epnt, instance, link_type,
143 dirn, dev_type)) {
144 fmt = (struct nhlt_fmt *)(epnt->config.caps +
145 epnt->config.size);
146 sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
147 s_rate, bps, link_type);
148 if (sp_config)
149 return sp_config;
150 }
151
152 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
153 }
154
155 return NULL;
156 }
157
skl_get_dmic_geo(struct skl * skl)158 int skl_get_dmic_geo(struct skl *skl)
159 {
160 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
161 struct nhlt_endpoint *epnt;
162 struct nhlt_dmic_array_config *cfg;
163 struct device *dev = &skl->pci->dev;
164 unsigned int dmic_geo = 0;
165 u8 j;
166
167 epnt = (struct nhlt_endpoint *)nhlt->desc;
168
169 for (j = 0; j < nhlt->endpoint_count; j++) {
170 if (epnt->linktype == NHLT_LINK_DMIC) {
171 cfg = (struct nhlt_dmic_array_config *)
172 (epnt->config.caps);
173 switch (cfg->array_type) {
174 case NHLT_MIC_ARRAY_2CH_SMALL:
175 case NHLT_MIC_ARRAY_2CH_BIG:
176 dmic_geo |= MIC_ARRAY_2CH;
177 break;
178
179 case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
180 case NHLT_MIC_ARRAY_4CH_L_SHAPED:
181 case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
182 dmic_geo |= MIC_ARRAY_4CH;
183 break;
184
185 default:
186 dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
187 cfg->array_type);
188
189 }
190 }
191 epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
192 }
193
194 return dmic_geo;
195 }
196
skl_nhlt_trim_space(char * trim)197 static void skl_nhlt_trim_space(char *trim)
198 {
199 char *s = trim;
200 int cnt;
201 int i;
202
203 cnt = 0;
204 for (i = 0; s[i]; i++) {
205 if (!isspace(s[i]))
206 s[cnt++] = s[i];
207 }
208
209 s[cnt] = '\0';
210 }
211
skl_nhlt_update_topology_bin(struct skl * skl)212 int skl_nhlt_update_topology_bin(struct skl *skl)
213 {
214 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
215 struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
216 struct device *dev = bus->dev;
217
218 dev_dbg(dev, "oem_id %.6s, oem_table_id %.8s oem_revision %d\n",
219 nhlt->header.oem_id, nhlt->header.oem_table_id,
220 nhlt->header.oem_revision);
221
222 snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
223 skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
224 nhlt->header.oem_revision, "-tplg.bin");
225
226 skl_nhlt_trim_space(skl->tplg_name);
227
228 return 0;
229 }
230
skl_nhlt_platform_id_show(struct device * dev,struct device_attribute * attr,char * buf)231 static ssize_t skl_nhlt_platform_id_show(struct device *dev,
232 struct device_attribute *attr, char *buf)
233 {
234 struct pci_dev *pci = to_pci_dev(dev);
235 struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
236 struct skl *skl = ebus_to_skl(ebus);
237 struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
238 char platform_id[32];
239
240 sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
241 nhlt->header.oem_id, nhlt->header.oem_table_id,
242 nhlt->header.oem_revision);
243
244 skl_nhlt_trim_space(platform_id);
245 return sprintf(buf, "%s\n", platform_id);
246 }
247
248 static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);
249
skl_nhlt_create_sysfs(struct skl * skl)250 int skl_nhlt_create_sysfs(struct skl *skl)
251 {
252 struct device *dev = &skl->pci->dev;
253
254 if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
255 dev_warn(dev, "Error creating sysfs entry\n");
256
257 return 0;
258 }
259
skl_nhlt_remove_sysfs(struct skl * skl)260 void skl_nhlt_remove_sysfs(struct skl *skl)
261 {
262 struct device *dev = &skl->pci->dev;
263
264 sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
265 }
266