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/* Cesar project {{{
 *
 * Copyright (C) 2008 Spidcom
 *
 * <<<Licence>>>
 *
 * }}} */
/**
 * \file    hal/phy/src/access.c
 * \brief   HAL Phy ACCESS functions.
 * \ingroup hal_phy
 */
#include "common/std.h"

#include "inc/context.h"
#include "inc/regs.h"

void
phy_access_backoff_start (phy_t *ctx, u32 date, uint cap)
{
    dbg_assert (ctx);
    dbg_assert (cap < 4);
    PHY_PRATIC_CSMA = BF_SHIFT (PHY_PRATIC_CSMA__MPDU_CAP, cap);
    PHY_PRATIC_TIMER_3_DATE = date;
    PHY_PRATIC_TIMER_3_CTRL = BF_SHIFT (PHY_PRATIC_TIMER_X_CTRL__ACTION,
                                        PHY_PRATIC_ACTION__START_PRP)
        | BF_MASK (PHY_PRATIC_TIMER_X_CTRL__VALID);
}

void
phy_access_backoff_update (phy_t *ctx, uint cap)
{
    dbg_assert (ctx);
    dbg_assert (cap < 4);
    PHY_PRATIC_CSMA = BF_SHIFT (PHY_PRATIC_CSMA__MPDU_CAP, cap);
}

uint
phy_access_backoff_slot_count (phy_t *ctx)
{
    dbg_assert (ctx);
    return BF_GET (PHY_PRATIC_CSMA__NB_SLOTS, PHY_PRATIC_CSMA);
}

bool
phy_access_backoff_prp_won (phy_t *ctx)
{
    dbg_assert (ctx);
    // TODO.
    return true;
}

void
phy_access_timer_program (phy_t *ctx, u32 date)
{
    dbg_assert (ctx);
    PHY_PRATIC_TIMER_1_DATE = date;
    PHY_PRATIC_TIMER_1_CTRL = BF_SHIFT (PHY_PRATIC_TIMER_X_CTRL__ACTION,
                                        PHY_PRATIC_ACTION__ACCESS)
        | BF_MASK (PHY_PRATIC_TIMER_X_CTRL__VALID);
}

void
phy_access_timer_cancel (phy_t *ctx)
{
    dbg_assert (ctx);
    PHY_PRATIC_TIMER_1_CTRL = 0;
}