// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Greybus Audio Device Class Protocol helpers
|
*
|
* Copyright 2015-2016 Google Inc.
|
*/
|
|
#include <linux/greybus.h>
|
#include "audio_codec.h"
|
|
/* TODO: Split into separate calls */
|
int gb_audio_gb_get_topology(struct gb_connection *connection,
|
struct gb_audio_topology **topology)
|
{
|
struct gb_audio_get_topology_size_response size_resp;
|
struct gb_audio_topology *topo;
|
u16 size;
|
int ret;
|
|
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
|
NULL, 0, &size_resp, sizeof(size_resp));
|
if (ret)
|
return ret;
|
|
size = le16_to_cpu(size_resp.size);
|
if (size < sizeof(*topo))
|
return -ENODATA;
|
|
topo = kzalloc(size, GFP_KERNEL);
|
if (!topo)
|
return -ENOMEM;
|
|
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, NULL, 0,
|
topo, size);
|
if (ret) {
|
kfree(topo);
|
return ret;
|
}
|
|
*topology = topo;
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology);
|
|
int gb_audio_gb_get_control(struct gb_connection *connection,
|
u8 control_id, u8 index,
|
struct gb_audio_ctl_elem_value *value)
|
{
|
struct gb_audio_get_control_request req;
|
struct gb_audio_get_control_response resp;
|
int ret;
|
|
req.control_id = control_id;
|
req.index = index;
|
|
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_CONTROL,
|
&req, sizeof(req), &resp, sizeof(resp));
|
if (ret)
|
return ret;
|
|
memcpy(value, &resp.value, sizeof(*value));
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_get_control);
|
|
int gb_audio_gb_set_control(struct gb_connection *connection,
|
u8 control_id, u8 index,
|
struct gb_audio_ctl_elem_value *value)
|
{
|
struct gb_audio_set_control_request req;
|
|
req.control_id = control_id;
|
req.index = index;
|
memcpy(&req.value, value, sizeof(req.value));
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_CONTROL,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_set_control);
|
|
int gb_audio_gb_enable_widget(struct gb_connection *connection,
|
u8 widget_id)
|
{
|
struct gb_audio_enable_widget_request req;
|
|
req.widget_id = widget_id;
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_ENABLE_WIDGET,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_enable_widget);
|
|
int gb_audio_gb_disable_widget(struct gb_connection *connection,
|
u8 widget_id)
|
{
|
struct gb_audio_disable_widget_request req;
|
|
req.widget_id = widget_id;
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_DISABLE_WIDGET,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_disable_widget);
|
|
int gb_audio_gb_get_pcm(struct gb_connection *connection, u16 data_cport,
|
u32 *format, u32 *rate, u8 *channels,
|
u8 *sig_bits)
|
{
|
struct gb_audio_get_pcm_request req;
|
struct gb_audio_get_pcm_response resp;
|
int ret;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
|
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_PCM,
|
&req, sizeof(req), &resp, sizeof(resp));
|
if (ret)
|
return ret;
|
|
*format = le32_to_cpu(resp.format);
|
*rate = le32_to_cpu(resp.rate);
|
*channels = resp.channels;
|
*sig_bits = resp.sig_bits;
|
|
return 0;
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_get_pcm);
|
|
int gb_audio_gb_set_pcm(struct gb_connection *connection, u16 data_cport,
|
u32 format, u32 rate, u8 channels,
|
u8 sig_bits)
|
{
|
struct gb_audio_set_pcm_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
req.format = cpu_to_le32(format);
|
req.rate = cpu_to_le32(rate);
|
req.channels = channels;
|
req.sig_bits = sig_bits;
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_PCM,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_set_pcm);
|
|
int gb_audio_gb_set_tx_data_size(struct gb_connection *connection,
|
u16 data_cport, u16 size)
|
{
|
struct gb_audio_set_tx_data_size_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
req.size = cpu_to_le16(size);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_TX_DATA_SIZE,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_set_tx_data_size);
|
|
int gb_audio_gb_activate_tx(struct gb_connection *connection,
|
u16 data_cport)
|
{
|
struct gb_audio_activate_tx_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_ACTIVATE_TX,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_activate_tx);
|
|
int gb_audio_gb_deactivate_tx(struct gb_connection *connection,
|
u16 data_cport)
|
{
|
struct gb_audio_deactivate_tx_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_DEACTIVATE_TX,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_deactivate_tx);
|
|
int gb_audio_gb_set_rx_data_size(struct gb_connection *connection,
|
u16 data_cport, u16 size)
|
{
|
struct gb_audio_set_rx_data_size_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
req.size = cpu_to_le16(size);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_RX_DATA_SIZE,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_set_rx_data_size);
|
|
int gb_audio_gb_activate_rx(struct gb_connection *connection,
|
u16 data_cport)
|
{
|
struct gb_audio_activate_rx_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_ACTIVATE_RX,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_activate_rx);
|
|
int gb_audio_gb_deactivate_rx(struct gb_connection *connection,
|
u16 data_cport)
|
{
|
struct gb_audio_deactivate_rx_request req;
|
|
req.data_cport = cpu_to_le16(data_cport);
|
|
return gb_operation_sync(connection, GB_AUDIO_TYPE_DEACTIVATE_RX,
|
&req, sizeof(req), NULL, 0);
|
}
|
EXPORT_SYMBOL_GPL(gb_audio_gb_deactivate_rx);
|
|
MODULE_LICENSE("GPL v2");
|
MODULE_ALIAS("greybus:audio-gb");
|
MODULE_DESCRIPTION("Greybus Audio Device Class Protocol library");
|
MODULE_AUTHOR("Mark Greer <mgreer@animalcreek.com>");
|
