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2215 | kebrt | 1 | /* |
2 | * Copyright (c) 2005-2007 Ondrej Palkovsky, Michal Kebrt |
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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 arm32 |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <interrupt.h> |
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36 | #include <ipc/irq.h> |
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37 | #include <console/chardev.h> |
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38 | #include <arch/drivers/gxemul.h> |
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39 | #include <console/console.h> |
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40 | #include <sysinfo/sysinfo.h> |
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41 | #include <print.h> |
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42 | |||
43 | /** Address of devices. */ |
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44 | #define GXEMUL_VIDEORAM 0x10000000 |
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45 | #define GXEMUL_KBD_ADDRESS 0x10000000 |
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46 | #define GXEMUL_KBD_IRQ 0 |
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47 | |||
48 | static chardev_t console; |
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49 | static irq_t gxemul_irq; |
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50 | |||
51 | static void gxemul_write(chardev_t *dev, const char ch); |
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52 | static void gxemul_enable(chardev_t *dev); |
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53 | static void gxemul_disable(chardev_t *dev); |
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54 | static char gxemul_do_read(chardev_t *dev); |
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55 | |||
56 | static chardev_operations_t gxemul_ops = { |
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57 | .resume = gxemul_enable, |
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58 | .suspend = gxemul_disable, |
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59 | .write = gxemul_write, |
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60 | .read = gxemul_do_read, |
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61 | }; |
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62 | |||
63 | /** Putchar that works with gxemul */ |
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64 | void gxemul_write(chardev_t *dev, const char ch) |
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65 | { |
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66 | *((char *) GXEMUL_VIDEORAM) = ch; |
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67 | } |
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68 | |||
69 | /* Called from getc(). */ |
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70 | void gxemul_enable(chardev_t *dev) |
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71 | { |
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72 | // cp0_unmask_int(GXEMUL_KBD_IRQ); |
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73 | } |
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74 | |||
75 | /* Called from getc(). */ |
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76 | void gxemul_disable(chardev_t *dev) |
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77 | { |
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78 | // cp0_mask_int(GXEMUL_KBD_IRQ); |
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79 | } |
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80 | |||
81 | /** Read character using polling, assume interrupts disabled */ |
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82 | static char gxemul_do_read(chardev_t *dev) |
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83 | { |
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84 | char ch; |
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85 | |||
86 | while (1) { |
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87 | ch = *((volatile char *) GXEMUL_KBD_ADDRESS); |
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88 | if (ch) { |
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89 | if (ch == '\r') |
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90 | return '\n'; |
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91 | if (ch == 0x7f) |
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92 | return '\b'; |
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93 | return ch; |
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94 | } |
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95 | } |
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96 | } |
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97 | |||
98 | /** Process keyboard interrupt. */ |
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99 | static void gxemul_irq_handler(irq_t *irq, void *arg, ...) |
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100 | { |
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101 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) |
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102 | ipc_irq_send_notif(irq); |
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103 | else { |
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104 | char ch = 0; |
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105 | |||
106 | ch = *((char *) GXEMUL_KBD_ADDRESS); |
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107 | if (ch =='\r') |
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108 | ch = '\n'; |
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109 | if (ch == 0x7f) |
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110 | ch = '\b'; |
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111 | chardev_push_character(&console, ch); |
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112 | } |
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113 | } |
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114 | |||
115 | static irq_ownership_t gxemul_claim(void) |
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116 | { |
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117 | return IRQ_ACCEPT; |
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118 | } |
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119 | |||
120 | void gxemul_kbd_grab(void) |
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121 | { |
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122 | ipl_t ipl = interrupts_disable(); |
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123 | spinlock_lock(&msim_irq.lock); |
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124 | gxemul_irq.notif_cfg.notify = false; |
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125 | spinlock_unlock(&gxemul_irq.lock); |
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126 | interrupts_restore(ipl); |
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127 | } |
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128 | |||
129 | void gxemul_kbd_release(void) |
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130 | { |
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131 | ipl_t ipl = interrupts_disable(); |
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132 | spinlock_lock(&gxemul_irq.lock); |
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133 | if (gxemul_irq.notif_cfg.answerbox) |
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134 | gxemul_irq.notif_cfg.notify = true; |
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135 | spinlock_unlock(&gxemul_irq.lock); |
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136 | interrupts_restore(ipl); |
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137 | } |
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138 | |||
139 | |||
140 | /* Return console object representing msim console */ |
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141 | void gxemul_console(devno_t devno) |
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142 | { |
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143 | chardev_initialize("msim_console", &console, &gxemul_ops); |
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144 | stdin = &console; |
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145 | stdout = &console; |
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146 | |||
147 | irq_initialize(&gxemul_irq); |
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148 | gxemul_irq.devno = devno; |
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149 | gxemul_irq.inr = GXEMUL_KBD_IRQ; |
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150 | gxemul_irq.claim = gxemul_claim; |
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151 | gxemul_irq.handler = gxemul_irq_handler; |
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152 | irq_register(&gxemul_irq); |
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153 | |||
154 | // cp0_unmask_int(GXEMUL_KBD_IRQ); |
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155 | |||
156 | sysinfo_set_item_val("kbd", NULL, true); |
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157 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
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158 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
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159 | sysinfo_set_item_val("kbd.address.virtual", NULL, GXEMUL_KBD_ADDRESS); |
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160 | } |
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161 | |||
162 | /** @} |
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163 | */ |