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4078 decky 1
/*
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 * Copyright (c) 2009 Martin Decky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup genarch
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 * @{
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 */
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/**
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 * @file
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 * @brief Dummy serial line input.
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 */
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#include <genarch/drivers/dsrln/dsrlnin.h>
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#include <console/chardev.h>
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#include <mm/slab.h>
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#include <arch/asm.h>
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#include <ddi/device.h>
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static irq_ownership_t dsrlnin_claim(irq_t *irq)
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{
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    return IRQ_ACCEPT;
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}
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static void dsrlnin_irq_handler(irq_t *irq)
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{
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    dsrlnin_instance_t *instance = irq->instance;
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    dsrlnin_t *dev = instance->dsrlnin;
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    indev_push_character(instance->srlnin, pio_read_8(&dev->data));
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}
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dsrlnin_instance_t *dsrlnin_init(dsrlnin_t *dev, inr_t inr)
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{
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    dsrlnin_instance_t *instance
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        = malloc(sizeof(dsrlnin_instance_t), FRAME_ATOMIC);
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    if (instance) {
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        instance->dsrlnin = dev;
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        instance->srlnin = NULL;
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        irq_initialize(&instance->irq);
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        instance->irq.devno = device_assign_devno();
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        instance->irq.inr = inr;
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        instance->irq.claim = dsrlnin_claim;
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        instance->irq.handler = dsrlnin_irq_handler;
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        instance->irq.instance = instance;
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    }
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    return instance;
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}
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void dsrlnin_wire(dsrlnin_instance_t *instance, indev_t *srlnin)
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{
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    ASSERT(instance);
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    ASSERT(srlnin);
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    instance->srlnin = srlnin;
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    irq_register(&instance->irq);
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}
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/** @}
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 */