1 files changed, 421 insertions, 0 deletions
diff --git a/src/lib/nhlt.c b/src/lib/nhlt.c
new file mode 100644
index 0000000000..4fa4a0c2c1
--- /dev/null
+++ b/src/lib/nhlt.c
@@ -0,0 +1,421 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 Google, Inc.
+ *
+ * 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 <arch/acpi.h>
+#include <cbfs.h>
+#include <commonlib/endian.h>
+#include <console/console.h>
+#include <nhlt.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define NHLT_RID 1
+#define NHLT_SSID 1
+#define WAVEFORMAT_TAG 0xfffe
+
+static const struct sub_format pcm_subformat = {
+	.data1 = 0x00000001,
+	.data2 = 0x0000,
+	.data3 = 0x0010,
+	.data4 = { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 },
+};
+
+struct nhlt *nhlt_init(void)
+{
+	struct nhlt *nhlt;
+
+	nhlt = malloc(sizeof(*nhlt));
+
+	if (nhlt == NULL)
+		return NULL;
+
+	memset(nhlt, 0, sizeof(*nhlt));
+
+	return nhlt;
+}
+
+struct nhlt_endpoint *nhlt_add_endpoint(struct nhlt *nhlt, int link_type,
+					int device_type, int dir,
+					uint16_t vid, uint16_t did)
+{
+	struct nhlt_endpoint *endp;
+
+	if (link_type < NHLT_LINK_HDA || link_type >= NHLT_MAX_LINK_TYPES)
+		return NULL;
+
+	if (nhlt->num_endpoints >= MAX_ENDPOINTS)
+		return NULL;
+
+	endp = &nhlt->endpoints[nhlt->num_endpoints];
+
+	endp->link_type = link_type;
+	endp->instance_id = nhlt->current_instance_id[link_type];
+	endp->vendor_id = vid;
+	endp->device_id = did;
+	endp->revision_id = NHLT_RID;
+	endp->subsystem_id = NHLT_SSID;
+	endp->device_type = device_type;
+	endp->direction = dir;
+	endp->virtual_bus_id = 0;
+
+	nhlt->num_endpoints++;
+
+	return endp;
+}
+
+static int append_specific_config(struct nhlt_specific_config *spec_cfg,
+					const void *config, size_t config_sz)
+{
+	size_t new_sz;
+	void *new_cfg;
+
+	if (config == NULL || config_sz == 0)
+		return 0;
+
+	new_sz = spec_cfg->size + config_sz;
+
+	new_cfg = malloc(new_sz);
+
+	if (new_cfg == NULL)
+		return -1;
+
+	/* Append new config. */
+	memcpy(new_cfg, spec_cfg->capabilities, spec_cfg->size);
+	memcpy(new_cfg + spec_cfg->size, config, config_sz);
+
+	free(spec_cfg->capabilities);
+
+	/* Update with new config data. */
+	spec_cfg->size = new_sz;
+	spec_cfg->capabilities = new_cfg;
+
+	return 0;
+}
+
+int nhlt_endpoint_append_config(struct nhlt_endpoint *endp, const void *config,
+				size_t config_sz)
+{
+	return append_specific_config(&endp->config, config, config_sz);
+}
+
+struct nhlt_format *nhlt_add_format(struct nhlt_endpoint *endp,
+					int num_channels,
+					int sample_freq_khz,
+					int container_bits_per_sample,
+					int valid_bits_per_sample,
+					uint32_t speaker_mask)
+{
+	struct nhlt_format *fmt;
+	struct nhlt_waveform *wave;
+
+	if (endp->num_formats >= MAX_FORMATS)
+		return NULL;
+
+	fmt = &endp->formats[endp->num_formats];
+	wave = &fmt->waveform;
+
+	wave->tag = WAVEFORMAT_TAG;
+	wave->num_channels = num_channels;
+	wave->samples_per_second = sample_freq_khz * KHz;
+	wave->bits_per_sample = container_bits_per_sample;
+	wave->extra_size = sizeof(wave->valid_bits_per_sample);
+	wave->extra_size += sizeof(wave->channel_mask);
+	wave->extra_size += sizeof(wave->sub_format);
+	wave->valid_bits_per_sample = valid_bits_per_sample;
+	wave->channel_mask = speaker_mask;
+	memcpy(&wave->sub_format, &pcm_subformat, sizeof(wave->sub_format));
+
+	/* Calculate the dervied fields. */
+	wave->block_align = wave->num_channels * wave->bits_per_sample / 8;
+	wave->bytes_per_second = wave->block_align * wave->samples_per_second;
+
+	endp->num_formats++;
+
+	return fmt;
+}
+
+int nhlt_format_append_config(struct nhlt_format *fmt, const void *config,
+				size_t config_sz)
+{
+	return append_specific_config(&fmt->config, config, config_sz);
+}
+
+int nhlt_endpoint_add_formats(struct nhlt_endpoint *endp,
+				const struct nhlt_format_config *formats,
+				size_t num_formats)
+{
+	size_t i;
+
+	for (i = 0; i < num_formats; i++) {
+		struct nhlt_format *fmt;
+		struct cbfsf file;
+		struct region_device settings;
+		void *settings_data;
+		const struct nhlt_format_config *cfg = &formats[i];
+
+		fmt = nhlt_add_format(endp, cfg->num_channels,
+					cfg->sample_freq_khz,
+					cfg->container_bits_per_sample,
+					cfg->valid_bits_per_sample,
+					cfg->speaker_mask);
+
+		if (fmt == NULL)
+			return -1;
+
+		if (cfg->settings_file == NULL)
+			continue;
+
+		/* Find the settings file in CBFS and place it in format. */
+		if (cbfs_boot_locate(&file, cfg->settings_file, NULL))
+			return -1;
+
+		cbfs_file_data(&settings, &file);
+
+		settings_data = rdev_mmap_full(&settings);
+
+		if (settings_data == NULL)
+			return -1;
+
+		if (nhlt_format_append_config(fmt, settings_data,
+					region_device_sz(&settings))) {
+			rdev_munmap(&settings, settings_data);
+			return -1;
+		}
+
+		rdev_munmap(&settings, settings_data);
+	}
+
+	return 0;
+}
+
+void nhlt_next_instance(struct nhlt *nhlt, int link_type)
+{
+	if (link_type < NHLT_LINK_HDA || link_type >= NHLT_MAX_LINK_TYPES)
+		return;
+
+	nhlt->current_instance_id[link_type]++;
+}
+
+static size_t calc_specific_config_size(struct nhlt_specific_config *cfg)
+{
+	return sizeof(cfg->size) + cfg->size;
+}
+
+static size_t calc_format_size(struct nhlt_format *fmt)
+{
+	size_t sz = 0;
+
+	/* Wave format first. */
+	sz += sizeof(fmt->waveform.tag);
+	sz += sizeof(fmt->waveform.num_channels);
+	sz += sizeof(fmt->waveform.samples_per_second);
+	sz += sizeof(fmt->waveform.bytes_per_second);
+	sz += sizeof(fmt->waveform.block_align);
+	sz += sizeof(fmt->waveform.bits_per_sample);
+	sz += sizeof(fmt->waveform.extra_size);
+	sz += sizeof(fmt->waveform.valid_bits_per_sample);
+	sz += sizeof(fmt->waveform.channel_mask);
+	sz += sizeof(fmt->waveform.sub_format);
+
+	sz += calc_specific_config_size(&fmt->config);
+
+	return sz;
+}
+
+static size_t calc_endpoint_size(struct nhlt_endpoint *endp)
+{
+	int i;
+	size_t sz = 0;
+
+	sz += sizeof(endp->length) + sizeof(endp->link_type);
+	sz += sizeof(endp->instance_id) + sizeof(endp->vendor_id);
+	sz += sizeof(endp->device_id) + sizeof(endp->revision_id);
+	sz += sizeof(endp->subsystem_id) + sizeof(endp->device_type);
+	sz += sizeof(endp->direction) + sizeof(endp->virtual_bus_id);
+	sz += calc_specific_config_size(&endp->config);
+	sz += sizeof(endp->num_formats);
+
+	for (i = 0; i < endp->num_formats; i++)
+		sz += calc_format_size(&endp->formats[i]);
+
+	/* Adjust endpoint length to reflect current configuration. */
+	endp->length = sz;
+
+	return sz;
+}
+
+static size_t calc_endpoints_size(struct nhlt *nhlt)
+{
+	int i;
+	size_t sz = 0;
+
+	for (i = 0; i < nhlt->num_endpoints; i++)
+		sz += calc_endpoint_size(&nhlt->endpoints[i]);
+
+	return sz;
+}
+
+static size_t calc_size(struct nhlt *nhlt)
+{
+	return sizeof(nhlt->num_endpoints) + calc_endpoints_size(nhlt);
+}
+
+size_t nhlt_current_size(struct nhlt *nhlt)
+{
+	return calc_size(nhlt) + sizeof(acpi_header_t);
+}
+
+static void nhlt_free_resources(struct nhlt *nhlt)
+{
+	int i;
+	int j;
+
+	/* Free all specific configs. */
+	for (i = 0; i < nhlt->num_endpoints; i++) {
+		struct nhlt_endpoint *endp = &nhlt->endpoints[i];
+
+		free(endp->config.capabilities);
+		for (j = 0; j < endp->num_formats; j++) {
+			struct nhlt_format *fmt = &endp->formats[j];
+
+			free(fmt->config.capabilities);
+		}
+	}
+
+	/* Free nhlt object proper. */
+	free(nhlt);
+}
+
+struct cursor {
+	uint8_t *buf;
+};
+
+static void ser8(struct cursor *cur, uint8_t val)
+{
+	write_le8(cur->buf, val);
+	cur->buf += sizeof(val);
+}
+
+static void ser16(struct cursor *cur, uint16_t val)
+{
+	write_le16(cur->buf, val);
+	cur->buf += sizeof(val);
+}
+
+static void ser32(struct cursor *cur, uint32_t val)
+{
+	write_le32(cur->buf, val);
+	cur->buf += sizeof(val);
+}
+
+static void serblob(struct cursor *cur, void *from, size_t sz)
+{
+	memcpy(cur->buf, from, sz);
+	cur->buf += sz;
+}
+
+static void serialize_specific_config(struct nhlt_specific_config *cfg,
+					struct cursor *cur)
+{
+	ser32(cur, cfg->size);
+	serblob(cur, cfg->capabilities, cfg->size);
+}
+
+static void serialize_waveform(struct nhlt_waveform *wave, struct cursor *cur)
+{
+	ser16(cur, wave->tag);
+	ser16(cur, wave->num_channels);
+	ser32(cur, wave->samples_per_second);
+	ser32(cur, wave->bytes_per_second);
+	ser16(cur, wave->block_align);
+	ser16(cur, wave->bits_per_sample);
+	ser16(cur, wave->extra_size);
+	ser16(cur, wave->valid_bits_per_sample);
+	ser32(cur, wave->channel_mask);
+	ser32(cur, wave->sub_format.data1);
+	ser16(cur, wave->sub_format.data2);
+	ser16(cur, wave->sub_format.data3);
+	serblob(cur, wave->sub_format.data4, sizeof(wave->sub_format.data4));
+}
+
+static void serialize_format(struct nhlt_format *fmt, struct cursor *cur)
+{
+	serialize_waveform(&fmt->waveform, cur);
+	serialize_specific_config(&fmt->config, cur);
+}
+
+static void serialize_endpoint(struct nhlt_endpoint *endp, struct cursor *cur)
+{
+	int i;
+
+	ser32(cur, endp->length);
+	ser8(cur, endp->link_type);
+	ser8(cur, endp->instance_id);
+	ser16(cur, endp->vendor_id);
+	ser16(cur, endp->device_id);
+	ser16(cur, endp->revision_id);
+	ser32(cur, endp->subsystem_id);
+	ser8(cur, endp->device_type);
+	ser8(cur, endp->direction);
+	ser8(cur, endp->virtual_bus_id);
+	serialize_specific_config(&endp->config, cur);
+	ser8(cur, endp->num_formats);
+
+	for (i = 0; i < endp->num_formats; i++)
+		serialize_format(&endp->formats[i], cur);
+}
+
+static void nhlt_serialize_endpoints(struct nhlt *nhlt, struct cursor *cur)
+{
+	int i;
+
+	ser8(cur, nhlt->num_endpoints);
+
+	for (i = 0; i < nhlt->num_endpoints; i++)
+		serialize_endpoint(&nhlt->endpoints[i], cur);
+}
+
+uintptr_t nhlt_serialize(struct nhlt *nhlt, uintptr_t acpi_addr)
+{
+	struct cursor cur;
+	acpi_header_t *header;
+	size_t sz;
+
+	printk(BIOS_DEBUG, "ACPI:    * NHLT\n");
+
+	sz = nhlt_current_size(nhlt);
+
+	/* Create header */
+	header = (void *)acpi_addr;
+	memset(header, 0, sizeof(acpi_header_t));
+	memcpy(header->signature, "NHLT", 4);
+	write_le32(&header->length, sz);
+	write_le8(&header->revision, 5);
+	memcpy(header->oem_id, OEM_ID, 6);
+	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+	memcpy(header->asl_compiler_id, ASLC, 4);
+
+	cur.buf = (void *)(acpi_addr + sizeof(acpi_header_t));
+	nhlt_serialize_endpoints(nhlt, &cur);
+
+	write_le8(&header->checksum, acpi_checksum((void *)header, sz));
+
+	nhlt_free_resources(nhlt);
+
+	acpi_addr += sz;
+	acpi_addr = ALIGN_UP(acpi_addr, 16);
+
+	return acpi_addr;
+}