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| Rev | Author | Line No. | Line |
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| 575 | palkovsky | 1 | /* |
| 2 | * Copyright (C) 2005 Ondrej Palkovsky |
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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 | #include <interrupt.h> |
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| 30 | #include <console/chardev.h> |
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| 31 | #include <arch/drivers/msim.h> |
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| 32 | #include <arch/cp0.h> |
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| 606 | palkovsky | 33 | #include <console/console.h> |
| 575 | palkovsky | 34 | |
| 35 | static chardev_t console; |
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| 36 | |||
| 37 | static void msim_write(chardev_t *dev, const char ch); |
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| 38 | static void msim_enable(chardev_t *dev); |
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| 39 | static void msim_disable(chardev_t *dev); |
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| 607 | palkovsky | 40 | static char msim_do_read(chardev_t *dev); |
| 575 | palkovsky | 41 | |
| 42 | static chardev_operations_t msim_ops = { |
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| 43 | .resume = msim_enable, |
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| 44 | .suspend = msim_disable, |
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| 607 | palkovsky | 45 | .write = msim_write, |
| 46 | .read = msim_do_read, |
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| 575 | palkovsky | 47 | }; |
| 48 | |||
| 49 | /** Putchar that works with MSIM & gxemul */ |
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| 50 | void msim_write(chardev_t *dev, const char ch) |
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| 51 | { |
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| 52 | *((char *) MSIM_VIDEORAM) = ch; |
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| 53 | } |
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| 54 | |||
| 55 | /* Called from getc(). */ |
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| 56 | void msim_enable(chardev_t *dev) |
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| 57 | { |
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| 58 | cp0_unmask_int(MSIM_KBD_IRQ); |
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| 59 | } |
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| 60 | |||
| 61 | /* Called from getc(). */ |
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| 62 | void msim_disable(chardev_t *dev) |
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| 63 | { |
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| 64 | cp0_mask_int(MSIM_KBD_IRQ); |
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| 65 | } |
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| 66 | |||
| 588 | palkovsky | 67 | #include <print.h> |
| 607 | palkovsky | 68 | /** Read character using polling, assume interrupts disabled */ |
| 69 | static char msim_do_read(chardev_t *dev) |
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| 70 | { |
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| 71 | char ch; |
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| 72 | |||
| 73 | while (1) { |
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| 74 | ch = *((volatile char *) MSIM_KBD_ADDRESS); |
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| 75 | if (ch) { |
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| 76 | if (ch == '\r') |
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| 77 | return '\n'; |
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| 78 | if (ch == 0x7f) |
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| 79 | return '\b'; |
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| 80 | return ch; |
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| 81 | } |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 575 | palkovsky | 85 | /** Process keyboard interrupt. */ |
| 958 | jermar | 86 | static void msim_interrupt(int n, istate_t *istate) |
| 575 | palkovsky | 87 | { |
| 607 | palkovsky | 88 | char ch = 0; |
| 575 | palkovsky | 89 | |
| 90 | ch = *((char *) MSIM_KBD_ADDRESS); |
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| 91 | if (ch =='\r') |
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| 92 | ch = '\n'; |
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| 588 | palkovsky | 93 | if (ch == 0x7f) |
| 94 | ch = '\b'; |
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| 575 | palkovsky | 95 | chardev_push_character(&console, ch); |
| 96 | } |
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| 97 | |||
| 98 | |||
| 99 | /* Return console object representing msim console */ |
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| 606 | palkovsky | 100 | void msim_console(void) |
| 575 | palkovsky | 101 | { |
| 102 | chardev_initialize("msim_console", &console, &msim_ops); |
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| 103 | |||
| 590 | palkovsky | 104 | int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt); |
| 575 | palkovsky | 105 | |
| 106 | cp0_unmask_int(MSIM_KBD_IRQ); |
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| 107 | |||
| 606 | palkovsky | 108 | stdin = &console; |
| 109 | stdout = &console; |
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| 575 | palkovsky | 110 | } |
| 1474 | palkovsky | 111 | |
| 112 | static iroutine oldvector; |
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| 113 | void msim_kbd_grab(void) |
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| 114 | { |
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| 115 | oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt); |
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| 116 | } |
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| 117 | void msim_kbd_release(void) |
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| 118 | { |
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| 119 | int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector); |
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| 120 | } |