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4078 | decky | 1 | /* |
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 | |||
29 | /** @addtogroup 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 | |||
37 | #include <genarch/drivers/dsrln/dsrlnin.h> |
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38 | #include <console/chardev.h> |
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39 | #include <mm/slab.h> |
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40 | #include <arch/asm.h> |
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4148 | decky | 41 | #include <ddi/device.h> |
4078 | decky | 42 | |
4119 | decky | 43 | static indev_operations_t kbrdin_ops = { |
4078 | decky | 44 | .poll = NULL |
45 | }; |
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46 | |||
47 | static irq_ownership_t dsrlnin_claim(irq_t *irq) |
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48 | { |
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49 | return IRQ_ACCEPT; |
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50 | } |
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51 | |||
52 | static void dsrlnin_irq_handler(irq_t *irq) |
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53 | { |
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54 | dsrlnin_instance_t *instance = irq->instance; |
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55 | dsrlnin_t *dev = instance->dsrlnin; |
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56 | |||
57 | indev_push_character(&instance->kbrdin, pio_read_8(&dev->data)); |
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58 | } |
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59 | |||
4148 | decky | 60 | indev_t *dsrlnin_init(dsrlnin_t *dev, inr_t inr) |
4078 | decky | 61 | { |
62 | dsrlnin_instance_t *instance |
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63 | = malloc(sizeof(dsrlnin_instance_t), FRAME_ATOMIC); |
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64 | if (!instance) |
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65 | return NULL; |
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66 | |||
67 | indev_initialize("dsrlnin", &instance->kbrdin, &kbrdin_ops); |
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68 | |||
69 | instance->dsrlnin = dev; |
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70 | |||
71 | irq_initialize(&instance->irq); |
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4148 | decky | 72 | instance->irq.devno = device_assign_devno(); |
4078 | decky | 73 | instance->irq.inr = inr; |
74 | instance->irq.claim = dsrlnin_claim; |
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75 | instance->irq.handler = dsrlnin_irq_handler; |
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76 | instance->irq.instance = instance; |
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77 | irq_register(&instance->irq); |
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78 | |||
79 | return &instance->kbrdin; |
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80 | } |
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81 | |||
82 | /** @} |
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83 | */ |