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#define IGNORE_CODE 0x7f        /* all keys up */
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#define IGNORE_CODE 0x7f        /* all keys up */
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static z8530_t z8530;       /**< z8530 device structure. */
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static z8530_t z8530;       /**< z8530 device structure. */
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static irq_t z8530_irq;     /**< z8530's IRQ. */
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static irq_t z8530_irq;     /**< z8530's IRQ. */
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static ipc_notif_cfg_t saved_notif_cfg;
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static void z8530_suspend(chardev_t *);
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static void z8530_suspend(chardev_t *);
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static void z8530_resume(chardev_t *);
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static void z8530_resume(chardev_t *);
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static chardev_operations_t ops = {
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static chardev_operations_t ops = {
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    .suspend = z8530_suspend,
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    .suspend = z8530_suspend,
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    /* 8 bits per character and enable receiver */
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    /* 8 bits per character and enable receiver */
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    z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
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    z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
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    z8530_write_a(&z8530, WR9, WR9_MIE);        /* Master Interrupt Enable. */
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    z8530_write_a(&z8530, WR9, WR9_MIE);        /* Master Interrupt Enable. */
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    if (z8530_irq.notif_cfg.answerbox) {
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        saved_notif_cfg = z8530_irq.notif_cfg;
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        z8530_irq.notif_cfg.answerbox = NULL;
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        z8530_irq.notif_cfg.code = NULL;
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    z8530_irq.notif_cfg.notify = false;
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        z8530_irq.notif_cfg.method = 0;
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        z8530_irq.notif_cfg.counter = 0;
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    }
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}
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}
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/** Resume the former IPC notification behavior. */
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/** Resume the former IPC notification behavior. */
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void z8530_release(void)
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void z8530_release(void)
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{
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{
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    if (saved_notif_cfg.answerbox)
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    if (z8530_irq.notif_cfg.answerbox)
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        z8530_irq.notif_cfg = saved_notif_cfg;
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        z8530_irq.notif_cfg.notify = true;
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}
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}
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/** Initialize z8530. */
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/** Initialize z8530. */
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void z8530_init(devno_t devno, inr_t inr, uintptr_t vaddr)
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void z8530_init(devno_t devno, inr_t inr, uintptr_t vaddr)
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{
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{
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     * Since we don't have enough documentation about the FHC
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     * Since we don't have enough documentation about the FHC
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     * and because the interrupt looks like level sensitive,
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     * and because the interrupt looks like level sensitive,
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     * we cannot handle it by scheduling one of the level
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     * we cannot handle it by scheduling one of the level
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     * interrupt traps. Process the interrupt directly.
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     * interrupt traps. Process the interrupt directly.
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     */
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     */
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    if (irq->notif_cfg.answerbox)
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    if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
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        ipc_irq_send_notif(irq);
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        ipc_irq_send_notif(irq);
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    else
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    else
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        z8530_interrupt();
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        z8530_interrupt();
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    fhc_clear_interrupt(central_fhc, irq->inr);
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    fhc_clear_interrupt(central_fhc, irq->inr);
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}
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}