u-boot/arch/x86/lib/acpi_nhlt.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 Google LLC
*
* Modified from coreboot nhlt.c
*/
#define LOG_CATEGORY LOGC_ACPI
#include <common.h>
#include <binman.h>
#include <dm.h>
#include <log.h>
#include <malloc.h>
#include <tables_csum.h>
#include <acpi/acpi_table.h>
#include <asm/acpi_nhlt.h>
#include <asm/unaligned.h>
#include <dm/acpi.h>
#define NHLT_RID 1
#define NHLT_SSID 1
#define WAVEFORMAT_TAG 0xfffe
#define DEFAULT_VIRTUAL_BUS_ID 0
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)
return NULL;
memset(nhlt, 0, sizeof(*nhlt));
nhlt->subsystem_id = NHLT_SSID;
return nhlt;
}
struct nhlt_endpoint *nhlt_add_endpoint(struct nhlt *nhlt, int link_type,
int device_type, int dir,
u16 vid, u16 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->subsystem_id;
endp->device_type = device_type;
endp->direction = dir;
endp->virtual_bus_id = DEFAULT_VIRTUAL_BUS_ID;
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;
new_sz = spec_cfg->size + config_sz;
new_cfg = malloc(new_sz);
if (!new_cfg)
return -ENOMEM;
/* 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 * 1000;
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)
{
ofnode node;
size_t i;
node = binman_section_find_node("private-files");
for (i = 0; i < num_formats; i++) {
const struct nhlt_format_config *cfg = &formats[i];
struct nhlt_format *fmt;
void *data;
int size;
int ret;
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)
return -ENOSPC;
if (!cfg->settings_file)
continue;
ret = binman_entry_map(node, cfg->settings_file, &data, &size);
if (ret) {
log_warning("Failed to find settings file %s\n",
cfg->settings_file);
return log_msg_ret("settings", ret);
}
ret = nhlt_format_append_config(fmt, data, size);
if (ret)
return log_msg_ret("append", ret);
}
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)
{
size_t sz = 0;
int i;
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(struct acpi_table_header);
}
static void nhlt_free_resources(struct nhlt *nhlt)
{
int i, 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 {
u8 *buf;
};
static void ser8(struct cursor *cur, uint val)
{
*cur->buf = val;
cur->buf += sizeof(val);
}
static void ser16(struct cursor *cur, uint val)
{
put_unaligned_le16(val, cur->buf);
cur->buf += sizeof(val);
}
static void ser32(struct cursor *cur, uint val)
{
put_unaligned_le32(val, cur->buf);
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 serialise_specific_config(struct nhlt_specific_config *cfg,
struct cursor *cur)
{
ser32(cur, cfg->size);
serblob(cur, cfg->capabilities, cfg->size);
}
static void serialise_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 serialise_format(struct nhlt_format *fmt, struct cursor *cur)
{
serialise_waveform(&fmt->waveform, cur);
serialise_specific_config(&fmt->config, cur);
}
static void serialise_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);
serialise_specific_config(&endp->config, cur);
ser8(cur, endp->num_formats);
for (i = 0; i < endp->num_formats; i++)
serialise_format(&endp->formats[i], cur);
}
static void nhlt_serialise_endpoints(struct nhlt *nhlt, struct cursor *cur)
{
int i;
ser8(cur, nhlt->num_endpoints);
for (i = 0; i < nhlt->num_endpoints; i++)
serialise_endpoint(&nhlt->endpoints[i], cur);
}
int nhlt_serialise_oem_overrides(struct acpi_ctx *ctx, struct nhlt *nhlt,
const char *oem_id, const char *oem_table_id,
uint32_t oem_revision)
{
struct cursor cur;
struct acpi_table_header *header;
size_t sz;
size_t oem_id_len;
size_t oem_table_id_len;
int ret;
log_info("ACPI: * NHLT\n");
sz = nhlt_current_size(nhlt);
/* Create header */
header = (void *)ctx->current;
memset(header, '\0', sizeof(struct acpi_table_header));
acpi_fill_header(header, "NHLT");
header->length = sz;
header->revision = acpi_get_table_revision(ACPITAB_NHLT);
if (oem_id) {
oem_id_len = min((int)strlen(oem_id), 6);
memcpy(header->oem_id, oem_id, oem_id_len);
}
if (oem_table_id) {
oem_table_id_len = min((int)strlen(oem_table_id), 8);
memcpy(header->oem_table_id, oem_table_id, oem_table_id_len);
}
header->oem_revision = oem_revision;
cur.buf = (void *)(header + 1);
nhlt_serialise_endpoints(nhlt, &cur);
header->checksum = table_compute_checksum(header, sz);
nhlt_free_resources(nhlt);
ret = acpi_add_table(ctx, ctx->current);
if (ret)
return log_msg_ret("add", ret);
acpi_inc_align(ctx, sz);
return 0;
}
static int _nhlt_add_single_endpoint(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epd)
{
struct nhlt_endpoint *endp;
int ret;
endp = nhlt_add_endpoint(nhlt, epd->link, epd->device, epd->direction,
epd->vid, epd->did);
if (!endp)
return -EINVAL;
endp->virtual_bus_id = virtual_bus_id;
ret = nhlt_endpoint_append_config(endp, epd->cfg, epd->cfg_size);
if (ret)
return ret;
ret = nhlt_endpoint_add_formats(endp, epd->formats, epd->num_formats);
if (ret)
return log_msg_ret("formats", ret);
return 0;
}
static int _nhlt_add_endpoints(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epds,
size_t num_epds)
{
size_t i;
int ret;
for (i = 0; i < num_epds; i++) {
ret = _nhlt_add_single_endpoint(nhlt, virtual_bus_id, &epds[i]);
if (ret)
return log_ret(ret);
}
return 0;
}
int nhlt_add_endpoints(struct nhlt *nhlt,
const struct nhlt_endp_descriptor *epds, size_t num_epds)
{
int ret;
ret = _nhlt_add_endpoints(nhlt, DEFAULT_VIRTUAL_BUS_ID, epds, num_epds);
return ret;
}
int nhlt_add_ssp_endpoints(struct nhlt *nhlt, int virtual_bus_id,
const struct nhlt_endp_descriptor *epds,
size_t num_epds)
{
int ret;
ret = _nhlt_add_endpoints(nhlt, virtual_bus_id, epds, num_epds);
if (!ret)
nhlt_next_instance(nhlt, NHLT_LINK_SSP);
return ret;
}