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/*
* Greybus audio driver
* Copyright 2015 Google Inc.
* Copyright 2015 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include "audio_codec.h"
#include "audio_apbridgea.h"
#include "audio_manager.h"
/*
* gb_snd management functions
*/
static int gbaudio_request_jack(struct gbaudio_module_info *module,
struct gb_audio_jack_event_request *req)
{
int report, button_status;
dev_warn_ratelimited(module->dev,
"Jack Event received: type: %u, event: %u\n",
req->jack_attribute, req->event);
if (req->event == GB_AUDIO_JACK_EVENT_REMOVAL) {
module->jack_type = 0;
button_status = module->button_status;
module->button_status = 0;
if (button_status)
snd_soc_jack_report(&module->button_jack, 0,
GBCODEC_JACK_BUTTON_MASK);
snd_soc_jack_report(&module->headset_jack, 0,
GBCODEC_JACK_MASK);
return 0;
}
/* currently supports Headphone, Headset & Lineout only */
report &= ~GBCODEC_JACK_MASK;
report |= req->jack_attribute & GBCODEC_JACK_MASK;
if (module->jack_type)
dev_warn_ratelimited(module->dev,
"Modifying jack from %d to %d\n",
module->jack_type, report);
module->jack_type = report;
snd_soc_jack_report(&module->headset_jack, report, GBCODEC_JACK_MASK);
return 0;
}
static int gbaudio_request_button(struct gbaudio_module_info *module,
struct gb_audio_button_event_request *req)
{
int soc_button_id, report;
dev_warn_ratelimited(module->dev,
"Button Event received: id: %u, event: %u\n",
req->button_id, req->event);
/* currently supports 4 buttons only */
if (!module->jack_type) {
dev_err_ratelimited(module->dev,
"Jack not present. Bogus event!!\n");
return -EINVAL;
}
report = module->button_status & GBCODEC_JACK_BUTTON_MASK;
switch (req->button_id) {
case 1:
soc_button_id = SND_JACK_BTN_0;
break;
case 2:
soc_button_id = SND_JACK_BTN_1;
break;
case 3:
soc_button_id = SND_JACK_BTN_2;
break;
case 4:
soc_button_id = SND_JACK_BTN_3;
break;
default:
dev_err_ratelimited(module->dev,
"Invalid button request received\n");
return -EINVAL;
}
if (req->event == GB_AUDIO_BUTTON_EVENT_PRESS)
report = report | soc_button_id;
else
report = report & ~soc_button_id;
module->button_status = report;
snd_soc_jack_report(&module->button_jack, report,
GBCODEC_JACK_BUTTON_MASK);
return 0;
}
static int gbaudio_request_stream(struct gbaudio_module_info *module,
struct gb_audio_streaming_event_request *req)
{
dev_warn(module->dev, "Audio Event received: cport: %u, event: %u\n",
req->data_cport, req->event);
return 0;
}
static int gbaudio_codec_request_handler(struct gb_operation *op)
{
struct gb_connection *connection = op->connection;
struct gbaudio_module_info *module =
greybus_get_drvdata(connection->bundle);
struct gb_operation_msg_hdr *header = op->request->header;
struct gb_audio_streaming_event_request *stream_req;
struct gb_audio_jack_event_request *jack_req;
struct gb_audio_button_event_request *button_req;
int ret;
switch (header->type) {
case GB_AUDIO_TYPE_STREAMING_EVENT:
stream_req = op->request->payload;
ret = gbaudio_request_stream(module, stream_req);
break;
case GB_AUDIO_TYPE_JACK_EVENT:
jack_req = op->request->payload;
ret = gbaudio_request_jack(module, jack_req);
break;
case GB_AUDIO_TYPE_BUTTON_EVENT:
button_req = op->request->payload;
ret = gbaudio_request_button(module, button_req);
break;
default:
dev_err_ratelimited(&connection->bundle->dev,
"Invalid Audio Event received\n");
return -EINVAL;
}
return ret;
}
static int gb_audio_add_mgmt_connection(struct gbaudio_module_info *gbmodule,
struct greybus_descriptor_cport *cport_desc,
struct gb_bundle *bundle)
{
struct gb_connection *connection;
/* Management Cport */
if (gbmodule->mgmt_connection) {
dev_err(&bundle->dev,
"Can't have multiple Management connections\n");
return -ENODEV;
}
connection = gb_connection_create(bundle, le16_to_cpu(cport_desc->id),
gbaudio_codec_request_handler);
if (IS_ERR(connection))
return PTR_ERR(connection);
greybus_set_drvdata(bundle, gbmodule);
gbmodule->mgmt_connection = connection;
return 0;
}
static int gb_audio_add_data_connection(struct gbaudio_module_info *gbmodule,
struct greybus_descriptor_cport *cport_desc,
struct gb_bundle *bundle)
{
struct gb_connection *connection;
struct gbaudio_data_connection *dai;
dai = devm_kzalloc(gbmodule->dev, sizeof(*dai), GFP_KERNEL);
if (!dai) {
dev_err(gbmodule->dev, "DAI Malloc failure\n");
return -ENOMEM;
}
connection = gb_connection_create_offloaded(bundle,
le16_to_cpu(cport_desc->id),
GB_CONNECTION_FLAG_CSD);
if (IS_ERR(connection)) {
devm_kfree(gbmodule->dev, dai);
return PTR_ERR(connection);
}
greybus_set_drvdata(bundle, gbmodule);
/* dai->name should be same as codec->dai_name */
strlcpy(dai->name, "greybus-apb1", NAME_SIZE);
dai->data_cport = connection->intf_cport_id;
dai->connection = connection;
list_add(&dai->list, &gbmodule->data_list);
return 0;
}
/*
* This is the basic hook get things initialized and registered w/ gb
*/
static int gb_audio_probe(struct gb_bundle *bundle,
const struct greybus_bundle_id *id)
{
struct device *dev = &bundle->dev;
struct gbaudio_module_info *gbmodule;
struct greybus_descriptor_cport *cport_desc;
struct gb_audio_manager_module_descriptor desc;
struct gbaudio_data_connection *dai, *_dai;
int ret, i;
struct gb_audio_topology *topology;
/* There should be at least one Management and one Data cport */
if (bundle->num_cports < 2)
return -ENODEV;
/*
* There can be only one Management connection and any number of data
* connections.
*/
gbmodule = devm_kzalloc(dev, sizeof(*gbmodule), GFP_KERNEL);
if (!gbmodule)
return -ENOMEM;
gbmodule->num_data_connections = bundle->num_cports - 1;
INIT_LIST_HEAD(&gbmodule->data_list);
INIT_LIST_HEAD(&gbmodule->widget_list);
INIT_LIST_HEAD(&gbmodule->ctl_list);
INIT_LIST_HEAD(&gbmodule->widget_ctl_list);
gbmodule->dev = dev;
snprintf(gbmodule->name, NAME_SIZE, "%s.%s", dev->driver->name,
dev_name(dev));
greybus_set_drvdata(bundle, gbmodule);
/* Create all connections */
for (i = 0; i < bundle->num_cports; i++) {
cport_desc = &bundle->cport_desc[i];
switch (cport_desc->protocol_id) {
case GREYBUS_PROTOCOL_AUDIO_MGMT:
ret = gb_audio_add_mgmt_connection(gbmodule, cport_desc,
bundle);
if (ret)
goto destroy_connections;
break;
case GREYBUS_PROTOCOL_AUDIO_DATA:
ret = gb_audio_add_data_connection(gbmodule, cport_desc,
bundle);
if (ret)
goto destroy_connections;
break;
default:
dev_err(dev, "Unsupported protocol: 0x%02x\n",
cport_desc->protocol_id);
ret = -ENODEV;
goto destroy_connections;
}
}
/* There must be a management cport */
if (!gbmodule->mgmt_connection) {
ret = -EINVAL;
dev_err(dev, "Missing management connection\n");
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