greybus: audio: Add Greybus Audio Device Class Protocol helper routines
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>hifive-unleashed-5.1
Mark Greer
Greg Kroah-Hartman
parent
ba4144afde
commit
184992e305
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@ -30,6 +30,7 @@ gb-hid-y := hid.o
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gb-es2-y := es2.o
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gb-arche-y := arche-platform.o arche-apb-ctrl.o
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gb-audio-codec-y := audio_codec.o
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gb-audio-gb-y := audio_gb.o
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gb-camera-y := camera.o
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obj-m += greybus.o
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@ -44,6 +45,7 @@ obj-m += gb-es2.o
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obj-m += gb-arche.o
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obj-m += gb-audio-codec.o
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obj-m += gb-camera.o
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obj-m += gb-audio-gb.o
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KERNELVER ?= $(shell uname -r)
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KERNELDIR ?= /lib/modules/$(KERNELVER)/build
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@ -13,6 +13,9 @@
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#include <sound/soc.h>
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#include "greybus.h"
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#include "greybus_protocols.h"
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#define NAME_SIZE 32
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enum {
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@ -82,5 +85,42 @@ struct gbaudio_codec_info {
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struct mutex lock;
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};
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extern int gb_audio_gb_get_topology(struct gb_connection *connection,
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struct gb_audio_topology **topology);
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extern int gb_audio_gb_get_control(struct gb_connection *connection,
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uint8_t control_id, uint8_t index,
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struct gb_audio_ctl_elem_value *value);
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extern int gb_audio_gb_set_control(struct gb_connection *connection,
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uint8_t control_id, uint8_t index,
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struct gb_audio_ctl_elem_value *value);
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extern int gb_audio_gb_enable_widget(struct gb_connection *connection,
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uint8_t widget_id);
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extern int gb_audio_gb_disable_widget(struct gb_connection *connection,
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uint8_t widget_id);
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extern int gb_audio_gb_get_pcm(struct gb_connection *connection,
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uint16_t data_cport, uint32_t *format,
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uint32_t *rate, uint8_t *channels,
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uint8_t *sig_bits);
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extern int gb_audio_gb_set_pcm(struct gb_connection *connection,
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uint16_t data_cport, uint32_t format,
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uint32_t rate, uint8_t channels,
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uint8_t sig_bits);
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extern int gb_audio_gb_set_tx_data_size(struct gb_connection *connection,
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uint16_t data_cport, uint16_t size);
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extern int gb_audio_gb_get_tx_delay(struct gb_connection *connection,
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uint16_t data_cport, uint32_t *delay);
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extern int gb_audio_gb_activate_tx(struct gb_connection *connection,
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uint16_t data_cport);
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extern int gb_audio_gb_deactivate_tx(struct gb_connection *connection,
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uint16_t data_cport);
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extern int gb_audio_gb_set_rx_data_size(struct gb_connection *connection,
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uint16_t data_cport, uint16_t size);
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extern int gb_audio_gb_get_rx_delay(struct gb_connection *connection,
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uint16_t data_cport, uint32_t *delay);
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extern int gb_audio_gb_activate_rx(struct gb_connection *connection,
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uint16_t data_cport);
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extern int gb_audio_gb_deactivate_rx(struct gb_connection *connection,
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uint16_t data_cport);
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#endif /* __KERNEL__ */
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#endif /* __LINUX_GBAUDIO_H */
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@ -0,0 +1,267 @@
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/*
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* Greybus Audio Device Class Protocol helpers
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*
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* Copyright 2015-2016 Google Inc.
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*
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* Released under the GPLv2 only.
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*/
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#include "greybus.h"
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#include "greybus_protocols.h"
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#include "operation.h"
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/* TODO: Split into separate calls */
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int gb_audio_gb_get_topology(struct gb_connection *connection,
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struct gb_audio_topology **topology)
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{
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struct gb_audio_get_topology_size_response size_resp;
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struct gb_audio_topology *topo;
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uint16_t size;
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int ret;
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY_SIZE,
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NULL, 0, &size_resp, sizeof(size_resp));
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if (ret)
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return ret;
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size = le16_to_cpu(size_resp.size);
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if (size < sizeof(*topo))
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return -ENODATA;
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topo = kzalloc(size, GFP_KERNEL);
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if (!topo)
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return -ENOMEM;
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TOPOLOGY, NULL, 0,
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topo, size);
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if (ret) {
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kfree(topo);
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return ret;
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}
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*topology = topo;
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_get_topology);
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int gb_audio_gb_get_control(struct gb_connection *connection,
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uint8_t control_id, uint8_t index,
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struct gb_audio_ctl_elem_value *value)
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{
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struct gb_audio_get_control_request req;
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struct gb_audio_get_control_response resp;
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int ret;
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req.control_id = control_id;
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req.index = index;
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_CONTROL,
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&req, sizeof(req), &resp, sizeof(resp));
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if (ret)
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return ret;
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memcpy(value, &resp.value, sizeof(*value));
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_get_control);
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int gb_audio_gb_set_control(struct gb_connection *connection,
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uint8_t control_id, uint8_t index,
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struct gb_audio_ctl_elem_value *value)
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{
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struct gb_audio_set_control_request req;
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req.control_id = control_id;
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req.index = index;
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memcpy(&req.value, value, sizeof(req.value));
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return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_CONTROL,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_set_control);
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int gb_audio_gb_enable_widget(struct gb_connection *connection,
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uint8_t widget_id)
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{
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struct gb_audio_enable_widget_request req;
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req.widget_id = widget_id;
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return gb_operation_sync(connection, GB_AUDIO_TYPE_ENABLE_WIDGET,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_enable_widget);
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int gb_audio_gb_disable_widget(struct gb_connection *connection,
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uint8_t widget_id)
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{
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struct gb_audio_disable_widget_request req;
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req.widget_id = widget_id;
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return gb_operation_sync(connection, GB_AUDIO_TYPE_DISABLE_WIDGET,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_disable_widget);
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int gb_audio_gb_get_pcm(struct gb_connection *connection, uint16_t data_cport,
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uint32_t *format, uint32_t *rate, uint8_t *channels,
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uint8_t *sig_bits)
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{
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struct gb_audio_get_pcm_request req;
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struct gb_audio_get_pcm_response resp;
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int ret;
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req.data_cport = cpu_to_le16(data_cport);
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_PCM,
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&req, sizeof(req), &resp, sizeof(resp));
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if (ret)
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return ret;
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*format = le32_to_cpu(resp.format);
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*rate = le32_to_cpu(resp.rate);
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*channels = resp.channels;
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*sig_bits = resp.sig_bits;
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_get_pcm);
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int gb_audio_gb_set_pcm(struct gb_connection *connection, uint16_t data_cport,
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uint32_t format, uint32_t rate, uint8_t channels,
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uint8_t sig_bits)
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{
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struct gb_audio_set_pcm_request req;
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req.data_cport = cpu_to_le16(data_cport);
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req.format = cpu_to_le32(format);
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req.rate = cpu_to_le32(rate);
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req.channels = channels;
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req.sig_bits = sig_bits;
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return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_PCM,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_set_pcm);
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int gb_audio_gb_set_tx_data_size(struct gb_connection *connection,
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uint16_t data_cport, uint16_t size)
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{
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struct gb_audio_set_tx_data_size_request req;
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req.data_cport = cpu_to_le16(data_cport);
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req.size = cpu_to_le16(size);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_TX_DATA_SIZE,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_set_tx_data_size);
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int gb_audio_gb_get_tx_delay(struct gb_connection *connection,
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uint16_t data_cport, uint32_t *delay)
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{
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struct gb_audio_get_tx_delay_request req;
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struct gb_audio_get_tx_delay_response resp;
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int ret;
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req.data_cport = cpu_to_le16(data_cport);
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_TX_DELAY,
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&req, sizeof(req), &resp, sizeof(resp));
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if (ret)
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return ret;
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*delay = le32_to_cpu(resp.delay);
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_get_tx_delay);
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int gb_audio_gb_activate_tx(struct gb_connection *connection,
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uint16_t data_cport)
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{
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struct gb_audio_activate_tx_request req;
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req.data_cport = cpu_to_le16(data_cport);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_ACTIVATE_TX,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_activate_tx);
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int gb_audio_gb_deactivate_tx(struct gb_connection *connection,
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uint16_t data_cport)
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{
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struct gb_audio_deactivate_tx_request req;
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req.data_cport = cpu_to_le16(data_cport);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_DEACTIVATE_TX,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_deactivate_tx);
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int gb_audio_gb_set_rx_data_size(struct gb_connection *connection,
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uint16_t data_cport, uint16_t size)
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{
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struct gb_audio_set_rx_data_size_request req;
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req.data_cport = cpu_to_le16(data_cport);
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req.size = cpu_to_le16(size);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_SET_RX_DATA_SIZE,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_set_rx_data_size);
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int gb_audio_gb_get_rx_delay(struct gb_connection *connection,
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uint16_t data_cport, uint32_t *delay)
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{
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struct gb_audio_get_rx_delay_request req;
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struct gb_audio_get_rx_delay_response resp;
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int ret;
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req.data_cport = cpu_to_le16(data_cport);
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ret = gb_operation_sync(connection, GB_AUDIO_TYPE_GET_RX_DELAY,
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&req, sizeof(req), &resp, sizeof(resp));
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if (ret)
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return ret;
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*delay = le32_to_cpu(resp.delay);
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return 0;
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_get_rx_delay);
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int gb_audio_gb_activate_rx(struct gb_connection *connection,
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uint16_t data_cport)
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{
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struct gb_audio_activate_rx_request req;
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req.data_cport = cpu_to_le16(data_cport);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_ACTIVATE_RX,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_activate_rx);
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int gb_audio_gb_deactivate_rx(struct gb_connection *connection,
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uint16_t data_cport)
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{
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struct gb_audio_deactivate_rx_request req;
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req.data_cport = cpu_to_le16(data_cport);
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return gb_operation_sync(connection, GB_AUDIO_TYPE_DEACTIVATE_RX,
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&req, sizeof(req), NULL, 0);
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}
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EXPORT_SYMBOL_GPL(gb_audio_gb_deactivate_rx);
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("greybus:audio-gb");
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MODULE_DESCRIPTION("Greybus Audio Device Class Protocol library");
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MODULE_AUTHOR("Mark Greer <mgreer@animalcreek.com>");
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