[thirdparty/u-boot.git] / arch / x86 / lib / acpi_nhlt.c

// 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 *start;
	u8 *buf;
};

static void ser8(struct cursor *cur, uint val)
{
	*cur->buf = val;
	cur->buf += sizeof(u8);
}

static void ser16(struct cursor *cur, uint val)
{
	put_unaligned_le16(val, cur->buf);
	cur->buf += sizeof(u16);
}

static void ser32(struct cursor *cur, uint val)
{
	put_unaligned_le32(val, cur->buf);
	cur->buf += sizeof(u32);
}

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)
{
	log_debug("%zx\n", cur->buf - cur->start);
	ser32(cur, cfg->size);
	serblob(cur, cfg->capabilities, cfg->size);
}

static void serialise_waveform(struct nhlt_waveform *wave, struct cursor *cur)
{
	log_debug("%zx\n", cur->buf - cur->start);
	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)
{
	log_debug("%zx\n", cur->buf - cur->start);
	serialise_waveform(&fmt->waveform, cur);
	serialise_specific_config(&fmt->config, cur);
}

static void serialise_endpoint(struct nhlt_endpoint *endp, struct cursor *cur)
{
	int i;

	log_debug("%zx\n", cur->buf - cur->start);
	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);
	cur.start = (void *)header;
	nhlt_serialise_endpoints(nhlt, &cur);

	header->checksum = table_compute_checksum(header, sz);
	nhlt_free_resources(nhlt);
	assert(cur.buf - cur.start == sz);

	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;
}
Commit	Line	Data
7f926c96 SG	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Copyright 2020 Google LLC
	4	*
	5	* Modified from coreboot nhlt.c
	6	*/
	7
	8	#define LOG_CATEGORY LOGC_ACPI
	9
	10	#include <common.h>
	11	#include <binman.h>
	12	#include <dm.h>
	13	#include <log.h>
	14	#include <malloc.h>
	15	#include <tables_csum.h>
	16	#include <acpi/acpi_table.h>
	17	#include <asm/acpi_nhlt.h>
	18	#include <asm/unaligned.h>
	19	#include <dm/acpi.h>
	20
	21	#define NHLT_RID 1
	22	#define NHLT_SSID 1
	23	#define WAVEFORMAT_TAG 0xfffe
	24	#define DEFAULT_VIRTUAL_BUS_ID 0
	25
	26	static const struct sub_format pcm_subformat = {
	27	.data1 = 0x00000001,
	28	.data2 = 0x0000,
	29	.data3 = 0x0010,
	30	.data4 = { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 },
	31	};
	32
	33	struct nhlt *nhlt_init(void)
	34	{
	35	struct nhlt *nhlt;
	36
	37	nhlt = malloc(sizeof(*nhlt));
	38
	39	if (!nhlt)
	40	return NULL;
	41
	42	memset(nhlt, 0, sizeof(*nhlt));
	43	nhlt->subsystem_id = NHLT_SSID;
	44
	45	return nhlt;
	46	}
	47
	48	struct nhlt_endpoint nhlt_add_endpoint(struct nhlt nhlt, int link_type,
	49	int device_type, int dir,
	50	u16 vid, u16 did)
	51	{
	52	struct nhlt_endpoint *endp;
	53
	54	if (link_type < NHLT_LINK_HDA \|\| link_type >= NHLT_MAX_LINK_TYPES)
	55	return NULL;
	56
	57	if (nhlt->num_endpoints >= MAX_ENDPOINTS)
	58	return NULL;
	59
	60	endp = &nhlt->endpoints[nhlt->num_endpoints];
	61
	62	endp->link_type = link_type;
	63	endp->instance_id = nhlt->current_instance_id[link_type];
	64	endp->vendor_id = vid;
65	endp->device_id = did;
66	endp->revision_id = NHLT_RID;
67	endp->subsystem_id = nhlt->subsystem_id;
68	endp->device_type = device_type;
69	endp->direction = dir;
70	endp->virtual_bus_id = DEFAULT_VIRTUAL_BUS_ID;
71
72	nhlt->num_endpoints++;
73
74	return endp;
75	}
76
77	static int append_specific_config(struct nhlt_specific_config *spec_cfg,
78	const void *config, size_t config_sz)
79	{
80	size_t new_sz;
81	void *new_cfg;
82
83	new_sz = spec_cfg->size + config_sz;
84	new_cfg = malloc(new_sz);
85	if (!new_cfg)
86	return -ENOMEM;
87
88	/* Append new config */
89	memcpy(new_cfg, spec_cfg->capabilities, spec_cfg->size);
90	memcpy(new_cfg + spec_cfg->size, config, config_sz);
91
92	free(spec_cfg->capabilities);
93
94	/* Update with new config data */
95	spec_cfg->size = new_sz;
96	spec_cfg->capabilities = new_cfg;
97
98	return 0;
99	}
100
101	int nhlt_endpoint_append_config(struct nhlt_endpoint endp, const void config,
102	size_t config_sz)
103	{
104	return append_specific_config(&endp->config, config, config_sz);
105	}
106
107	struct nhlt_format nhlt_add_format(struct nhlt_endpoint endp,
108	int num_channels, int sample_freq_khz,
109	int container_bits_per_sample,
110	int valid_bits_per_sample,
111	uint32_t speaker_mask)
112	{
113	struct nhlt_format *fmt;
114	struct nhlt_waveform *wave;
115
116	if (endp->num_formats >= MAX_FORMATS)
117	return NULL;
118
119	fmt = &endp->formats[endp->num_formats];
120	wave = &fmt->waveform;
121
122	wave->tag = WAVEFORMAT_TAG;
123	wave->num_channels = num_channels;
124	wave->samples_per_second = sample_freq_khz * 1000;
125	wave->bits_per_sample = container_bits_per_sample;
126	wave->extra_size = sizeof(wave->valid_bits_per_sample);
127	wave->extra_size += sizeof(wave->channel_mask);
128	wave->extra_size += sizeof(wave->sub_format);
129	wave->valid_bits_per_sample = valid_bits_per_sample;
130	wave->channel_mask = speaker_mask;
131	memcpy(&wave->sub_format, &pcm_subformat, sizeof(wave->sub_format));
132
133	/* Calculate the dervied fields */
134	wave->block_align = wave->num_channels * wave->bits_per_sample / 8;
135	wave->bytes_per_second = wave->block_align * wave->samples_per_second;
136
137	endp->num_formats++;
138
139	return fmt;
140	}
141
142	int nhlt_format_append_config(struct nhlt_format fmt, const void config,
143	size_t config_sz)
144	{
145	return append_specific_config(&fmt->config, config, config_sz);
146	}
147
148	int nhlt_endpoint_add_formats(struct nhlt_endpoint *endp,
149	const struct nhlt_format_config *formats,
150	size_t num_formats)
151	{
152	ofnode node;
153	size_t i;
154
155	node = binman_section_find_node("private-files");
156
157	for (i = 0; i < num_formats; i++) {
158	const struct nhlt_format_config *cfg = &formats[i];
159	struct nhlt_format *fmt;
160	void *data;
161	int size;
162	int ret;
163
164	fmt = nhlt_add_format(endp, cfg->num_channels,
165	cfg->sample_freq_khz,
166	cfg->container_bits_per_sample,
167	cfg->valid_bits_per_sample,
168	cfg->speaker_mask);
169	if (!fmt)
170	return -ENOSPC;
171
172	if (!cfg->settings_file)
173	continue;
174
175	ret = binman_entry_map(node, cfg->settings_file, &data, &size);
176	if (ret) {
177	log_warning("Failed to find settings file %s\n",
178	cfg->settings_file);
179	return log_msg_ret("settings", ret);
180	}
181
182	ret = nhlt_format_append_config(fmt, data, size);
183	if (ret)
184	return log_msg_ret("append", ret);
185	}
186
187	return 0;
188	}
189
190	void nhlt_next_instance(struct nhlt *nhlt, int link_type)
191	{
192	if (link_type < NHLT_LINK_HDA \|\| link_type >= NHLT_MAX_LINK_TYPES)
193	return;
194
195	nhlt->current_instance_id[link_type]++;
196	}
197
198	static size_t calc_specific_config_size(struct nhlt_specific_config *cfg)
199	{
200	return sizeof(cfg->size) + cfg->size;
201	}
202
203	static size_t calc_format_size(struct nhlt_format *fmt)
204	{
205	size_t sz = 0;
206
207	/* Wave format first */
208	sz += sizeof(fmt->waveform.tag);
209	sz += sizeof(fmt->waveform.num_channels);
210	sz += sizeof(fmt->waveform.samples_per_second);
211	sz += sizeof(fmt->waveform.bytes_per_second);
212	sz += sizeof(fmt->waveform.block_align);
213	sz += sizeof(fmt->waveform.bits_per_sample);
214	sz += sizeof(fmt->waveform.extra_size);
215	sz += sizeof(fmt->waveform.valid_bits_per_sample);
216	sz += sizeof(fmt->waveform.channel_mask);
217	sz += sizeof(fmt->waveform.sub_format);
218
219	sz += calc_specific_config_size(&fmt->config);
220
221	return sz;
222	}
223
224	static size_t calc_endpoint_size(struct nhlt_endpoint *endp)
225	{
226	int i;
227	size_t sz = 0;
228
229	sz += sizeof(endp->length) + sizeof(endp->link_type);
230	sz += sizeof(endp->instance_id) + sizeof(endp->vendor_id);
231	sz += sizeof(endp->device_id) + sizeof(endp->revision_id);
232	sz += sizeof(endp->subsystem_id) + sizeof(endp->device_type);
233	sz += sizeof(endp->direction) + sizeof(endp->virtual_bus_id);
234	sz += calc_specific_config_size(&endp->config);
235	sz += sizeof(endp->num_formats);
236
237	for (i = 0; i < endp->num_formats; i++)
238	sz += calc_format_size(&endp->formats[i]);
239
240	/* Adjust endpoint length to reflect current configuration */
241	endp->length = sz;
242
243	return sz;
244	}
245
246	static size_t calc_endpoints_size(struct nhlt *nhlt)
247	{
248	size_t sz = 0;
249	int i;
250
251	for (i = 0; i < nhlt->num_endpoints; i++)
252	sz += calc_endpoint_size(&nhlt->endpoints[i]);
253
254	return sz;
255	}
256
257	static size_t calc_size(struct nhlt *nhlt)
258	{
259	return sizeof(nhlt->num_endpoints) + calc_endpoints_size(nhlt);
260	}
261
262	size_t nhlt_current_size(struct nhlt *nhlt)
263	{
264	return calc_size(nhlt) + sizeof(struct acpi_table_header);
265	}
266
267	static void nhlt_free_resources(struct nhlt *nhlt)
268	{
269	int i, j;
270
271	/* Free all specific configs */
272	for (i = 0; i < nhlt->num_endpoints; i++) {
273	struct nhlt_endpoint *endp = &nhlt->endpoints[i];
274
275	free(endp->config.capabilities);
276	for (j = 0; j < endp->num_formats; j++) {
277	struct nhlt_format *fmt = &endp->formats[j];
278
279	free(fmt->config.capabilities);
280	}
281	}
282
283	/* Free nhlt object proper */
284	free(nhlt);
285	}
286
287	struct cursor {
a87fff80	288	u8 *start;
7f926c96 SG	289	u8 *buf;
	290	};
	291
	292	static void ser8(struct cursor *cur, uint val)
	293	{
	294	*cur->buf = val;
a87fff80	295	cur->buf += sizeof(u8);
7f926c96 SG	296	}
	297
	298	static void ser16(struct cursor *cur, uint val)
	299	{
	300	put_unaligned_le16(val, cur->buf);
a87fff80	301	cur->buf += sizeof(u16);
7f926c96 SG	302	}
	303
	304	static void ser32(struct cursor *cur, uint val)
	305	{
	306	put_unaligned_le32(val, cur->buf);
a87fff80	307	cur->buf += sizeof(u32);
7f926c96 SG	308	}
	309
	310	static void serblob(struct cursor cur, void from, size_t sz)
	311	{
	312	memcpy(cur->buf, from, sz);
	313	cur->buf += sz;
	314	}
	315
	316	static void serialise_specific_config(struct nhlt_specific_config *cfg,
	317	struct cursor *cur)
	318	{
a87fff80	319	log_debug("%zx\n", cur->buf - cur->start);
7f926c96 SG	320	ser32(cur, cfg->size);
	321	serblob(cur, cfg->capabilities, cfg->size);
	322	}
	323
	324	static void serialise_waveform(struct nhlt_waveform wave, struct cursor cur)
	325	{
a87fff80	326	log_debug("%zx\n", cur->buf - cur->start);
7f926c96 SG	327	ser16(cur, wave->tag);
	328	ser16(cur, wave->num_channels);
	329	ser32(cur, wave->samples_per_second);
	330	ser32(cur, wave->bytes_per_second);
	331	ser16(cur, wave->block_align);
	332	ser16(cur, wave->bits_per_sample);
	333	ser16(cur, wave->extra_size);
	334	ser16(cur, wave->valid_bits_per_sample);
	335	ser32(cur, wave->channel_mask);
	336	ser32(cur, wave->sub_format.data1);
	337	ser16(cur, wave->sub_format.data2);
	338	ser16(cur, wave->sub_format.data3);
	339	serblob(cur, wave->sub_format.data4, sizeof(wave->sub_format.data4));
	340	}
	341
	342	static void serialise_format(struct nhlt_format fmt, struct cursor cur)
	343	{
a87fff80	344	log_debug("%zx\n", cur->buf - cur->start);
7f926c96 SG	345	serialise_waveform(&fmt->waveform, cur);
	346	serialise_specific_config(&fmt->config, cur);
	347	}
	348
	349	static void serialise_endpoint(struct nhlt_endpoint endp, struct cursor cur)
	350	{
	351	int i;
	352
a87fff80	353	log_debug("%zx\n", cur->buf - cur->start);
7f926c96 SG	354	ser32(cur, endp->length);
	355	ser8(cur, endp->link_type);
	356	ser8(cur, endp->instance_id);
	357	ser16(cur, endp->vendor_id);
	358	ser16(cur, endp->device_id);
	359	ser16(cur, endp->revision_id);
	360	ser32(cur, endp->subsystem_id);
	361	ser8(cur, endp->device_type);
	362	ser8(cur, endp->direction);
	363	ser8(cur, endp->virtual_bus_id);
	364	serialise_specific_config(&endp->config, cur);
	365	ser8(cur, endp->num_formats);
	366
	367	for (i = 0; i < endp->num_formats; i++)
	368	serialise_format(&endp->formats[i], cur);
	369	}
	370
	371	static void nhlt_serialise_endpoints(struct nhlt nhlt, struct cursor cur)
	372	{
	373	int i;
	374
	375	ser8(cur, nhlt->num_endpoints);
	376
	377	for (i = 0; i < nhlt->num_endpoints; i++)
	378	serialise_endpoint(&nhlt->endpoints[i], cur);
	379	}
	380
	381	int nhlt_serialise_oem_overrides(struct acpi_ctx ctx, struct nhlt nhlt,
	382	const char oem_id, const char oem_table_id,
	383	uint32_t oem_revision)
	384	{
	385	struct cursor cur;
	386	struct acpi_table_header *header;
	387	size_t sz;
	388	size_t oem_id_len;
	389	size_t oem_table_id_len;
	390	int ret;
	391
	392	log_info("ACPI: * NHLT\n");
	393	sz = nhlt_current_size(nhlt);
	394
	395	/* Create header */
	396	header = (void *)ctx->current;
	397	memset(header, '\0', sizeof(struct acpi_table_header));
	398	acpi_fill_header(header, "NHLT");
	399	header->length = sz;
	400	header->revision = acpi_get_table_revision(ACPITAB_NHLT);
	401
	402	if (oem_id) {
	403	oem_id_len = min((int)strlen(oem_id), 6);
	404	memcpy(header->oem_id, oem_id, oem_id_len);
	405	}
	406	if (oem_table_id) {
	407	oem_table_id_len = min((int)strlen(oem_table_id), 8);
	408	memcpy(header->oem_table_id, oem_table_id, oem_table_id_len);
	409	}
	410	header->oem_revision = oem_revision;
	411
	412	cur.buf = (void *)(header + 1);
a87fff80	413	cur.start = (void *)header;
7f926c96 SG	414	nhlt_serialise_endpoints(nhlt, &cur);
	415
	416	header->checksum = table_compute_checksum(header, sz);
	417	nhlt_free_resources(nhlt);
a87fff80	418	assert(cur.buf - cur.start == sz);
7f926c96 SG	419
	420	ret = acpi_add_table(ctx, ctx->current);
	421	if (ret)
	422	return log_msg_ret("add", ret);
	423	acpi_inc_align(ctx, sz);
	424
	425	return 0;
	426	}
	427
	428	static int _nhlt_add_single_endpoint(struct nhlt *nhlt, int virtual_bus_id,
	429	const struct nhlt_endp_descriptor *epd)
	430	{
	431	struct nhlt_endpoint *endp;
	432	int ret;
	433
	434	endp = nhlt_add_endpoint(nhlt, epd->link, epd->device, epd->direction,
	435	epd->vid, epd->did);
	436	if (!endp)
	437	return -EINVAL;
	438
	439	endp->virtual_bus_id = virtual_bus_id;
	440
	441	ret = nhlt_endpoint_append_config(endp, epd->cfg, epd->cfg_size);
	442	if (ret)
	443	return ret;
	444
	445	ret = nhlt_endpoint_add_formats(endp, epd->formats, epd->num_formats);
	446	if (ret)
	447	return log_msg_ret("formats", ret);
	448
	449	return 0;
	450	}
	451
	452	static int _nhlt_add_endpoints(struct nhlt *nhlt, int virtual_bus_id,
	453	const struct nhlt_endp_descriptor *epds,
	454	size_t num_epds)
	455	{
	456	size_t i;
	457	int ret;
	458
	459	for (i = 0; i < num_epds; i++) {
	460	ret = _nhlt_add_single_endpoint(nhlt, virtual_bus_id, &epds[i]);
	461	if (ret)
	462	return log_ret(ret);
	463	}
	464
	465	return 0;
	466	}
	467
	468	int nhlt_add_endpoints(struct nhlt *nhlt,
	469	const struct nhlt_endp_descriptor *epds, size_t num_epds)
	470	{
	471	int ret;
	472
	473	ret = _nhlt_add_endpoints(nhlt, DEFAULT_VIRTUAL_BUS_ID, epds, num_epds);
	474
	475	return ret;
	476	}
	477
	478	int nhlt_add_ssp_endpoints(struct nhlt *nhlt, int virtual_bus_id,
	479	const struct nhlt_endp_descriptor *epds,
	480	size_t num_epds)
	481	{
	482	int ret;
483
484	ret = _nhlt_add_endpoints(nhlt, virtual_bus_id, epds, num_epds);
485	if (!ret)
486	nhlt_next_instance(nhlt, NHLT_LINK_SSP);
487
488	return ret;
489	}