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greybus: audio: Add Greybus Audio Device Class Protocol helper routines

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Add helper routines to make communicating with audio modules easier.

Signed-off-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Mark Greer 2016-01-13 14:07:46 -07:00 committed by Greg Kroah-Hartman
parent ba4144afde
commit 184992e305
3 changed files with 309 additions and 0 deletions
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2
drivers/staging/greybus/Makefile
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@ -30,6 +30,7 @@ gb-hid-y := hid.o
gb-es2-y := es2.o
gb-arche-y := arche-platform.o arche-apb-ctrl.o
gb-audio-codec-y := audio_codec.o
gb-audio-gb-y := audio_gb.o
gb-camera-y := camera.o
obj-m += greybus.o
@ -44,6 +45,7 @@ obj-m += gb-es2.o
obj-m += gb-arche.o
obj-m += gb-audio-codec.o
obj-m += gb-camera.o
obj-m += gb-audio-gb.o
KERNELVER ?= $(shell uname -r)
KERNELDIR ?= /lib/modules/$(KERNELVER)/build

40
drivers/staging/greybus/audio.h
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@ -13,6 +13,9 @@
#include <sound/soc.h>
#include "greybus.h"
#include "greybus_protocols.h"
#define NAME_SIZE 32
enum {
@ -82,5 +85,42 @@ struct gbaudio_codec_info {
struct mutex lock;
};
extern int gb_audio_gb_get_topology(struct gb_connection *connection,
struct gb_audio_topology **topology);
extern int gb_audio_gb_get_control(struct gb_connection *connection,
uint8_t control_id, uint8_t index,
struct gb_audio_ctl_elem_value *value);
extern int gb_audio_gb_set_control(struct gb_connection *connection,
uint8_t control_id, uint8_t index,
struct gb_audio_ctl_elem_value *value);
extern int gb_audio_gb_enable_widget(struct gb_connection *connection,
uint8_t widget_id);
extern int gb_audio_gb_disable_widget(struct gb_connection *connection,
uint8_t widget_id);
extern int gb_audio_gb_get_pcm(struct gb_connection *connection,
uint16_t data_cport, uint32_t *format,
uint32_t *rate, uint8_t *channels,
uint8_t *sig_bits);
extern int gb_audio_gb_set_pcm(struct gb_connection *connection,
uint16_t data_cport, uint32_t format,
uint32_t rate, uint8_t channels,
uint8_t sig_bits);
extern int gb_audio_gb_set_tx_data_size(struct gb_connection *connection,
uint16_t data_cport, uint16_t size);
extern int gb_audio_gb_get_tx_delay(struct gb_connection *connection,
uint16_t data_cport, uint32_t *delay);
extern int gb_audio_gb_activate_tx(struct gb_connection *connection,
uint16_t data_cport);
extern int gb_audio_gb_deactivate_tx(struct gb_connection *connection,
uint16_t data_cport);
extern int gb_audio_gb_set_rx_data_size(struct gb_connection *connection,
uint16_t data_cport, uint16_t size);
extern int gb_audio_gb_get_rx_delay(struct gb_connection *connection,
uint16_t data_cport, uint32_t *delay);
extern int gb_audio_gb_activate_rx(struct gb_connection *connection,
uint16_t data_cport);
extern int gb_audio_gb_deactivate_rx(struct gb_connection *connection,
uint16_t data_cport);
#endif /* __KERNEL__ */
#endif /* __LINUX_GBAUDIO_H */

267
drivers/staging/greybus/audio_gb.c Normal file
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@ -0,0 +1,267 @@
/*
* Greybus Audio Device Class Protocol helpers
*
* Copyright 2015-2016 Google Inc.
*
* Released under the GPLv2 only.
*/
#include "greybus.h"
#include "greybus_protocols.h"
#include "operation.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;
uint16_t 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,
uint8_t control_id, uint8_t 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,
uint8_t control_id, uint8_t 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,
uint8_t 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,
uint8_t 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, uint16_t data_cport,
uint32_t *format, uint32_t *rate, uint8_t *channels,
uint8_t *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, uint16_t data_cport,
uint32_t format, uint32_t rate, uint8_t channels,
uint8_t 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,
uint16_t data_cport, uint16_t 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_get_tx_delay(struct gb_connection *connection,
uint16_t data_cport, uint32_t *delay)
{
struct gb_audio_get_tx_delay_request req;
struct gb_audio_get_tx_delay_response resp;
int ret;
req.data_cport = cpu_to_le16(data_cport);
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TX_DELAY,
&req, sizeof(req), &resp, sizeof(resp));
if (ret)
return ret;
*delay = le32_to_cpu(resp.delay);
return 0;
}
EXPORT_SYMBOL_GPL(gb_audio_gb_get_tx_delay);
int gb_audio_gb_activate_tx(struct gb_connection *connection,
uint16_t 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,
uint16_t 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,
uint16_t data_cport, uint16_t 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_get_rx_delay(struct gb_connection *connection,
uint16_t data_cport, uint32_t *delay)
{
struct gb_audio_get_rx_delay_request req;
struct gb_audio_get_rx_delay_response resp;
int ret;
req.data_cport = cpu_to_le16(data_cport);
ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_RX_DELAY,
&req, sizeof(req), &resp, sizeof(resp));
if (ret)
return ret;
*delay = le32_to_cpu(resp.delay);
return 0;
}
EXPORT_SYMBOL_GPL(gb_audio_gb_get_rx_delay);
int gb_audio_gb_activate_rx(struct gb_connection *connection,
uint16_t 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,
uint16_t 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>");