| 1 | /*
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| 2 | * Copyright (c) 2009 Martin Decky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup kernel_genarch
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief Dummy serial line input.
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| 35 | */
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| 36 |
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| 37 | #include <assert.h>
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| 38 | #include <genarch/drivers/dsrln/dsrlnin.h>
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| 39 | #include <console/chardev.h>
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| 40 | #include <stdlib.h>
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| 41 | #include <arch/asm.h>
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| 42 |
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| 43 | static irq_ownership_t dsrlnin_claim(irq_t *irq)
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| 44 | {
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| 45 | return IRQ_ACCEPT;
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| 46 | }
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| 47 |
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| 48 | static void dsrlnin_irq_handler(irq_t *irq)
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| 49 | {
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| 50 | dsrlnin_instance_t *instance = irq->instance;
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| 51 | dsrlnin_t *dev = instance->dsrlnin;
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| 52 |
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| 53 | indev_push_character(instance->srlnin, pio_read_8(&dev->data));
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| 54 | }
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| 55 |
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| 56 | dsrlnin_instance_t *dsrlnin_init(dsrlnin_t *dev, inr_t inr)
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| 57 | {
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| 58 | dsrlnin_instance_t *instance =
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| 59 | malloc(sizeof(dsrlnin_instance_t));
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| 60 | if (instance) {
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| 61 | instance->dsrlnin = dev;
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| 62 | instance->srlnin = NULL;
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| 63 |
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| 64 | irq_initialize(&instance->irq);
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| 65 | instance->irq.inr = inr;
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| 66 | instance->irq.claim = dsrlnin_claim;
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| 67 | instance->irq.handler = dsrlnin_irq_handler;
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| 68 | instance->irq.instance = instance;
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| 69 | }
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| 70 |
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| 71 | return instance;
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| 72 | }
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| 73 |
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| 74 | void dsrlnin_wire(dsrlnin_instance_t *instance, indev_t *srlnin)
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| 75 | {
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| 76 | assert(instance);
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| 77 | assert(srlnin);
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| 78 |
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| 79 | instance->srlnin = srlnin;
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| 80 | irq_register(&instance->irq);
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| 81 | }
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| 82 |
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| 83 | /** @}
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| 84 | */
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