summaryrefslogtreecommitdiff
path: root/sound/soc/intel/skylake/skl-nhlt.c
blob: b0c7bd113aacfd59db229320f5227985010bb8f4 (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
/*
 *  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 "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"

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

		return memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
				MEMREMAP_WB);
	}

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

void skl_nhlt_free(void *addr)
{
	memunmap(addr);
}

static struct nhlt_specific_cfg *skl_get_specific_cfg(
		struct device *dev, struct nhlt_fmt *fmt,
		u8 no_ch, u32 rate, u16 bps)
{
	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->samples_per_sec == rate &&
					wfmt->bits_per_sample == bps) {
			sp_config = &fmt_config->config;

			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)
{
	dev_dbg(dev, "vbus_id=%d link_type=%d dir=%d\n",
		epnt->virtual_bus_id, epnt->linktype, epnt->direction);

	if ((epnt->virtual_bus_id == instance_id) &&
			(epnt->linktype == link_type) &&
			(epnt->direction == dirn))
		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)
{
	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 = (struct nhlt_acpi_table *)skl->nhlt;
	u16 bps = num_ch * s_fmt;
	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)) {
			fmt = (struct nhlt_fmt *)(epnt->config.caps +
						 epnt->config.size);
			sp_config = skl_get_specific_cfg(dev, fmt, num_ch, s_rate, bps);
			if (sp_config)
				return sp_config;
		}

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

	return NULL;
}