teleinfo: Initial driver skeleton.

[libsigrok.git] / hardware / teleinfo / api.c

/*
 * This file is part of the libsigrok project.
 *
 * Copyright (C) 2013 Aurelien Jacobs <aurel@gnuage.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "protocol.h"

SR_PRIV struct sr_dev_driver teleinfo_driver_info;
static struct sr_dev_driver *di = &teleinfo_driver_info;

static int init(struct sr_context *sr_ctx)
{
	return std_init(sr_ctx, di, LOG_PREFIX);
}

static GSList *scan(GSList *options)
{
	struct drv_context *drvc;
	GSList *devices;

	(void)options;

	devices = NULL;
	drvc = di->priv;
	drvc->instances = NULL;

	/* TODO: scan for devices, either based on a SR_CONF_CONN option
	 * or on a USB scan. */

	return devices;
}

static GSList *dev_list(void)
{
	return ((struct drv_context *)(di->priv))->instances;
}

static int dev_clear(void)
{
	return std_dev_clear(di, NULL);
}

static int dev_open(struct sr_dev_inst *sdi)
{
	(void)sdi;

	/* TODO: get handle from sdi->conn and open it. */

	sdi->status = SR_ST_ACTIVE;

	return SR_OK;
}

static int dev_close(struct sr_dev_inst *sdi)
{
	(void)sdi;

	/* TODO: get handle from sdi->conn and close it. */

	sdi->status = SR_ST_INACTIVE;

	return SR_OK;
}

static int cleanup(void)
{
	dev_clear();

	/* TODO: free other driver resources, if any. */

	return SR_OK;
}

static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
	int ret;

	(void)sdi;
	(void)data;

	ret = SR_OK;
	switch (key) {
	/* TODO */
	default:
		return SR_ERR_NA;
	}

	return ret;
}

static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
{
	int ret;

	(void)data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	ret = SR_OK;
	switch (key) {
	/* TODO */
	default:
		ret = SR_ERR_NA;
	}

	return ret;
}

static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
{
	int ret;

	(void)sdi;
	(void)data;

	ret = SR_OK;
	switch (key) {
	/* TODO */
	default:
		return SR_ERR_NA;
	}

	return ret;
}

static int dev_acquisition_start(const struct sr_dev_inst *sdi,
				    void *cb_data)
{
	(void)sdi;
	(void)cb_data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	/* TODO: configure hardware, reset acquisition state, set up
	 * callbacks and send header packet. */

	return SR_OK;
}

static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
{
	(void)cb_data;

	if (sdi->status != SR_ST_ACTIVE)
		return SR_ERR_DEV_CLOSED;

	/* TODO: stop acquisition. */

	return SR_OK;
}

SR_PRIV struct sr_dev_driver teleinfo_driver_info = {
	.name = "teleinfo",
	.longname = "Teleinfo",
	.api_version = 1,
	.init = init,
	.cleanup = cleanup,
	.scan = scan,
	.dev_list = dev_list,
	.dev_clear = dev_clear,
	.config_get = config_get,
	.config_set = config_set,
	.config_list = config_list,
	.dev_open = dev_open,
	.dev_close = dev_close,
	.dev_acquisition_start = dev_acquisition_start,
	.dev_acquisition_stop = dev_acquisition_stop,
	.priv = NULL,
};