summaryrefslogtreecommitdiffstats
path: root/sound/soc/intel/skylake/skl-nhlt.c
blob: 7eb9c419dc7f0a432c0ba0acf7894d41e621aea3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
/*
 *  skl-nhlt.c - Intel SKL Platform NHLT parsing
 *
 *  Copyright (C) 2015 Intel Corp
 *  Author: Sanjiv Kumar <sanjiv.kumar@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */
#include <linux/pci.h>
#include "skl.h"

/* Unique identification for getting NHLT blobs */
static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
				0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};

#define DSDT_NHLT_PATH "\\_SB.PCI0.HDAS"

struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
{
	acpi_handle handle;
	union acpi_object *obj;
	struct nhlt_resource_desc  *nhlt_ptr = NULL;
	struct nhlt_acpi_table *nhlt_table = NULL;

	if (ACPI_FAILURE(acpi_get_handle(NULL, DSDT_NHLT_PATH, &handle))) {
		dev_err(dev, "Requested NHLT device not found\n");
		return NULL;
	}

	obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
	if (obj && obj->type == ACPI_TYPE_BUFFER) {
		nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
		nhlt_table = (struct nhlt_acpi_table *)
				memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
				MEMREMAP_WB);
		ACPI_FREE(obj);
		return nhlt_table;
	}

	dev_err(dev, "device specific method to extract NHLT blob failed\n");
	return NULL;
}

void skl_nhlt_free(struct nhlt_acpi_table *nhlt)
{
	memunmap((void *) nhlt);
}

static struct nhlt_specific_cfg *skl_get_specific_cfg(
		struct device *dev, struct nhlt_fmt *fmt,
		u8 no_ch, u32 rate, u16 bps, u8 linktype)
{
	struct nhlt_specific_cfg *sp_config;
	struct wav_fmt *wfmt;
	struct nhlt_fmt_cfg *fmt_config = fmt->fmt_config;
	int i;

	dev_dbg(dev, "Format count =%d\n", fmt->fmt_count);

	for (i = 0; i < fmt->fmt_count; i++) {
		wfmt = &fmt_config->fmt_ext.fmt;
		dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", wfmt->channels,
			 wfmt->bits_per_sample, wfmt->samples_per_sec);
		if (wfmt->channels == no_ch && wfmt->bits_per_sample == bps) {
			/*
			 * if link type is dmic ignore rate check as the blob is
			 * generic for all rates
			 */
			sp_config = &fmt_config->config;
			if (linktype == NHLT_LINK_DMIC)
				return sp_config;

			if (wfmt->samples_per_sec == rate)
				return sp_config;
		}

		fmt_config = (struct nhlt_fmt_cfg *)(fmt_config->config.caps +
						fmt_config->config.size);
	}

	return NULL;
}

static void dump_config(struct device *dev, u32 instance_id, u8 linktype,
		u8 s_fmt, u8 num_channels, u32 s_rate, u8 dirn, u16 bps)
{
	dev_dbg(dev, "Input configuration\n");
	dev_dbg(dev, "ch=%d fmt=%d s_rate=%d\n", num_channels, s_fmt, s_rate);
	dev_dbg(dev, "vbus_id=%d link_type=%d\n", instance_id, linktype);
	dev_dbg(dev, "bits_per_sample=%d\n", bps);
}

static bool skl_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
		u32 instance_id, u8 link_type, u8 dirn, u8 dev_type)
{
	dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
			epnt->virtual_bus_id, epnt->linktype,
			epnt->direction, epnt->device_type);

	if ((epnt->virtual_bus_id == instance_id) &&
			(epnt->linktype == link_type) &&
			(epnt->direction == dirn) &&
			(epnt->device_type == dev_type))
		return true;
	else
		return false;
}

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)
{
	struct nhlt_fmt *fmt;
	struct nhlt_endpoint *epnt;
	struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
	struct device *dev = bus->dev;
	struct nhlt_specific_cfg *sp_config;
	struct nhlt_acpi_table *nhlt = skl->nhlt;
	u16 bps = (s_fmt == 16) ? 16 : 32;
	u8 j;

	dump_config(dev, instance, link_type, s_fmt, num_ch, s_rate, dirn, bps);

	epnt = (struct nhlt_endpoint *)nhlt->desc;

	dev_dbg(dev, "endpoint count =%d\n", nhlt->endpoint_count);

	for (j = 0; j < nhlt->endpoint_count; j++) {
		if (skl_check_ep_match(dev, epnt, instance, link_type,
						dirn, dev_type)) {
			fmt = (struct nhlt_fmt *)(epnt->config.caps +
						 epnt->config.size);
			sp_config = skl_get_specific_cfg(dev, fmt, num_ch,
							s_rate, bps, link_type);
			if (sp_config)
				return sp_config;
		}

		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}

	return NULL;
}

int skl_get_dmic_geo(struct skl *skl)
{
	struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
	struct nhlt_endpoint *epnt;
	struct nhlt_dmic_array_config *cfg;
	struct device *dev = &skl->pci->dev;
	unsigned int dmic_geo = 0;
	u8 j;

	epnt = (struct nhlt_endpoint *)nhlt->desc;

	for (j = 0; j < nhlt->endpoint_count; j++) {
		if (epnt->linktype == NHLT_LINK_DMIC) {
			cfg = (struct nhlt_dmic_array_config  *)
					(epnt->config.caps);
			switch (cfg->array_type) {
			case NHLT_MIC_ARRAY_2CH_SMALL:
			case NHLT_MIC_ARRAY_2CH_BIG:
				dmic_geo |= MIC_ARRAY_2CH;
				break;

			case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
			case NHLT_MIC_ARRAY_4CH_L_SHAPED:
			case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
				dmic_geo |= MIC_ARRAY_4CH;
				break;

			default:
				dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
						cfg->array_type);

			}
		}
		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
	}

	return dmic_geo;
}

static void skl_nhlt_trim_space(char *trim)
{
	char *s = trim;
	int cnt;
	int i;

	cnt = 0;
	for (i = 0; s[i]; i++) {
		if (!isspace(s[i]))
			s[cnt++] = s[i];
	}

	s[cnt] = '\0';
}

int skl_nhlt_update_topology_bin(struct skl *skl)
{
	struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
	struct hdac_bus *bus = ebus_to_hbus(&skl->ebus);
	struct device *dev = bus->dev;

	dev_dbg(dev, "oem_id %.6s, oem_table_id %8s oem_revision %d\n",
		nhlt->header.oem_id, nhlt->header.oem_table_id,
		nhlt->header.oem_revision);

	snprintf(skl->tplg_name, sizeof(skl->tplg_name), "%x-%.6s-%.8s-%d%s",
		skl->pci_id, nhlt->header.oem_id, nhlt->header.oem_table_id,
		nhlt->header.oem_revision, "-tplg.bin");

	skl_nhlt_trim_space(skl->tplg_name);

	return 0;
}

static ssize_t skl_nhlt_platform_id_show(struct device *dev,
			struct device_attribute *attr, char *buf)
{
	struct pci_dev *pci = to_pci_dev(dev);
	struct hdac_ext_bus *ebus = pci_get_drvdata(pci);
	struct skl *skl = ebus_to_skl(ebus);
	struct nhlt_acpi_table *nhlt = (struct nhlt_acpi_table *)skl->nhlt;
	char platform_id[32];

	sprintf(platform_id, "%x-%.6s-%.8s-%d", skl->pci_id,
			nhlt->header.oem_id, nhlt->header.oem_table_id,
			nhlt->header.oem_revision);

	skl_nhlt_trim_space(platform_id);
	return sprintf(buf, "%s\n", platform_id);
}

static DEVICE_ATTR(platform_id, 0444, skl_nhlt_platform_id_show, NULL);

int skl_nhlt_create_sysfs(struct skl *skl)
{
	struct device *dev = &skl->pci->dev;

	if (sysfs_create_file(&dev->kobj, &dev_attr_platform_id.attr))
		dev_warn(dev, "Error creating sysfs entry\n");

	return 0;
}

void skl_nhlt_remove_sysfs(struct skl *skl)
{
	struct device *dev = &skl->pci->dev;

	sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr);
}