/*
<:copyright-BRCM:2016:DUAL/GPL:standard

   Broadcom Proprietary and Confidential.(c) 2016 Broadcom
   All Rights Reserved

Unless you and Broadcom execute a separate written software license
agreement governing use of this software, this software is licensed
to you under the terms of the GNU General Public License version 2
(the "GPL"), available at http://www.broadcom.com/licenses/GPLv2.php,
with the following added to such license:

   As a special exception, the copyright holders of this software give
   you permission to link this software with independent modules, and
   to copy and distribute the resulting executable under terms of your
   choice, provided that you also meet, for each linked independent
   module, the terms and conditions of the license of that module.
   An independent module is a module which is not derived from this
   software.  The special exception does not apply to any modifications
   of the software.

Not withstanding the above, under no circumstances may you combine
this software in any way with any other Broadcom software provided
under a license other than the GPL, without Broadcom's express prior
written consent.

:>
 */

/*
 * bcmolt_dev_selector.c
 * Set / get current device for all CLI commands
 */
#include <bcmos_system.h>
#include <bcmcli.h>
#include <bcmolt_dev_selector.h>

/* Current device. External variable */

/* Device change callback registration structure */
typedef struct dev_sel_subscriber dev_sel_subscriber;
struct dev_sel_subscriber
{
    F_current_device_change_ind cb;     /* Subscriber's callback */
    STAILQ_ENTRY(dev_sel_subscriber) next;
};

static STAILQ_HEAD(dev_sel_subscriber_list, dev_sel_subscriber) subscriber_list;

/* Get/set the current device CLI handler
 */
static bcmos_errno _dev_sel_device_handler(bcmcli_session *session, const bcmcli_cmd_parm parm[], uint16_t nparms)
{
    /* If current device was set - notify all subscribers.
     * Do not check if it changed here. Sometimes it is good to be able
     * to refresh.
     */
    if (nparms)
    {
        dev_sel_subscriber *subs;

        current_device = parm[0].value.number;

        /* Notify all subscribers */
        STAILQ_FOREACH(subs, &subscriber_list, next)
        {
            subs->cb(session, current_device);
        }
    }

    bcmcli_session_print(session, "Current device: %ld\n", (long)current_device);

    return BCM_ERR_OK;
}


/* Register for current device change notification.
 * Multiple clients can register.
 */
bcmos_errno bcmolt_dev_sel_ind_register(F_current_device_change_ind cb)
{
    dev_sel_subscriber *subs = bcmos_calloc(sizeof(dev_sel_subscriber));

    if (!subs)
        return BCM_ERR_NOMEM;

    subs->cb = cb;
    STAILQ_INSERT_TAIL(&subscriber_list, subs, next);

    return BCM_ERR_OK;
}

/* Initialize device selector module */
bcmos_errno bcmolt_dev_sel_init(bcmcli_entry *parent_dir)
{
    STAILQ_INIT(&subscriber_list);

    /* Get/set current device */
    BCMCLI_MAKE_CMD(parent_dir, "device", "Get/Set the current device", _dev_sel_device_handler,
        BCMCLI_MAKE_PARM_RANGE("device", "Device index", BCMCLI_PARM_NUMBER, BCMCLI_PARM_FLAG_OPTIONAL,
            0, BCMTR_MAX_OLTS-1));

    return BCM_ERR_OK;
}