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1 | jermar | 1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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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 | |||
1754 | jermar | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
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1754 | jermar | 32 | /** |
1757 | jermar | 33 | * @file |
1842 | jermar | 34 | * @brief Zilog 8530 serial port / keyboard driver. |
1702 | cejka | 35 | */ |
36 | |||
1842 | jermar | 37 | #include <genarch/kbd/z8530.h> |
1843 | jermar | 38 | #include <genarch/kbd/key.h> |
1842 | jermar | 39 | #include <genarch/kbd/scanc.h> |
40 | #include <genarch/kbd/scanc_sun.h> |
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1849 | jermar | 41 | #include <arch/drivers/fhc.h> |
1842 | jermar | 42 | #include <arch/drivers/z8530.h> |
1 | jermar | 43 | #include <arch/interrupt.h> |
1875 | jermar | 44 | #include <arch/drivers/kbd.h> |
1 | jermar | 45 | #include <cpu.h> |
46 | #include <arch/asm.h> |
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47 | #include <arch.h> |
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508 | jermar | 48 | #include <typedefs.h> |
511 | jermar | 49 | #include <console/chardev.h> |
50 | #include <console/console.h> |
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576 | palkovsky | 51 | #include <interrupt.h> |
1875 | jermar | 52 | #include <sysinfo/sysinfo.h> |
53 | #include <print.h> |
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1 | jermar | 54 | |
670 | vana | 55 | /* |
1842 | jermar | 56 | * These codes read from z8530 data register are silently ignored. |
895 | jermar | 57 | */ |
1842 | jermar | 58 | #define IGNORE_CODE 0x7f /* all keys up */ |
895 | jermar | 59 | |
1875 | jermar | 60 | bool z8530_belongs_to_kernel = true; |
61 | |||
1842 | jermar | 62 | static void z8530_suspend(chardev_t *); |
63 | static void z8530_resume(chardev_t *); |
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511 | jermar | 64 | |
1843 | jermar | 65 | chardev_t kbrd; |
511 | jermar | 66 | static chardev_operations_t ops = { |
1842 | jermar | 67 | .suspend = z8530_suspend, |
68 | .resume = z8530_resume, |
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878 | vana | 69 | .read = key_read |
511 | jermar | 70 | }; |
71 | |||
1848 | jermar | 72 | void z8530_wait(void); |
576 | palkovsky | 73 | |
1474 | palkovsky | 74 | /** Initialize keyboard and service interrupts using kernel routine */ |
1842 | jermar | 75 | void z8530_grab(void) |
1 | jermar | 76 | { |
1875 | jermar | 77 | z8530_belongs_to_kernel = true; |
1474 | palkovsky | 78 | } |
1849 | jermar | 79 | |
1474 | palkovsky | 80 | /** Resume the former interrupt vector */ |
1842 | jermar | 81 | void z8530_release(void) |
1474 | palkovsky | 82 | { |
1875 | jermar | 83 | z8530_belongs_to_kernel = false; |
1474 | palkovsky | 84 | } |
670 | vana | 85 | |
1842 | jermar | 86 | /** Initialize z8530. */ |
87 | void z8530_init(void) |
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1474 | palkovsky | 88 | { |
1842 | jermar | 89 | chardev_initialize("z8530_kbd", &kbrd, &ops); |
511 | jermar | 90 | stdin = &kbrd; |
1195 | jermar | 91 | |
1875 | jermar | 92 | sysinfo_set_item_val("kbd", NULL, true); |
93 | sysinfo_set_item_val("kbd.irq", NULL, 0); |
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94 | sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address); |
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95 | |||
1849 | jermar | 96 | (void) z8530_read_a(RR8); |
97 | |||
1875 | jermar | 98 | /* |
99 | * Clear any pending TX interrupts or we never manage |
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100 | * to set FHC UART interrupt state to idle. |
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101 | */ |
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102 | z8530_write_a(WR0, WR0_TX_IP_RST); |
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1848 | jermar | 103 | |
1875 | jermar | 104 | z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */ |
105 | |||
1848 | jermar | 106 | /* 8 bits per character and enable receiver */ |
107 | z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE); |
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108 | |||
1875 | jermar | 109 | z8530_write_a(WR9, WR9_MIE); /* Master Interrupt Enable. */ |
1849 | jermar | 110 | |
111 | /* |
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112 | * We need to initialize the FireHose Controller, |
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113 | * to which is this z8530 attached. Otherwise |
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114 | * interrupts generated by the z8530 would not |
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115 | * be forwarded to the CPU. |
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116 | */ |
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117 | fhc_init(); |
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1 | jermar | 118 | } |
119 | |||
1842 | jermar | 120 | /** Process z8530 interrupt. |
508 | jermar | 121 | * |
122 | * @param n Interrupt vector. |
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1708 | jermar | 123 | * @param istate Interrupted state. |
508 | jermar | 124 | */ |
1849 | jermar | 125 | void z8530_interrupt(void) |
1 | jermar | 126 | { |
1849 | jermar | 127 | z8530_poll(); |
1 | jermar | 128 | } |
508 | jermar | 129 | |
895 | jermar | 130 | /** Wait until the controller reads its data. */ |
1842 | jermar | 131 | void z8530_wait(void) { |
895 | jermar | 132 | } |
133 | |||
511 | jermar | 134 | /* Called from getc(). */ |
1842 | jermar | 135 | void z8530_resume(chardev_t *d) |
511 | jermar | 136 | { |
137 | } |
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138 | |||
139 | /* Called from getc(). */ |
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1842 | jermar | 140 | void z8530_suspend(chardev_t *d) |
511 | jermar | 141 | { |
142 | } |
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878 | vana | 143 | |
1843 | jermar | 144 | char key_read(chardev_t *d) |
878 | vana | 145 | { |
146 | char ch; |
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147 | |||
894 | jermar | 148 | while(!(ch = active_read_buff_read())) { |
1780 | jermar | 149 | uint8_t x; |
1848 | jermar | 150 | while (!(z8530_read_a(RR0) & RR0_RCA)) |
894 | jermar | 151 | ; |
1848 | jermar | 152 | x = z8530_read_a(RR8); |
895 | jermar | 153 | if (x != IGNORE_CODE) { |
154 | if (x & KEY_RELEASE) |
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155 | key_released(x ^ KEY_RELEASE); |
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156 | else |
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157 | active_read_key_pressed(x); |
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158 | } |
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878 | vana | 159 | } |
160 | return ch; |
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161 | } |
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895 | jermar | 162 | |
163 | /** Poll for key press and release events. |
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164 | * |
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165 | * This function can be used to implement keyboard polling. |
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166 | */ |
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1842 | jermar | 167 | void z8530_poll(void) |
895 | jermar | 168 | { |
1780 | jermar | 169 | uint8_t x; |
895 | jermar | 170 | |
1848 | jermar | 171 | while (z8530_read_a(RR0) & RR0_RCA) { |
172 | x = z8530_read_a(RR8); |
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895 | jermar | 173 | if (x != IGNORE_CODE) { |
174 | if (x & KEY_RELEASE) |
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175 | key_released(x ^ KEY_RELEASE); |
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176 | else |
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177 | key_pressed(x); |
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178 | } |
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179 | } |
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180 | } |
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1702 | cejka | 181 | |
1754 | jermar | 182 | /** @} |
1702 | cejka | 183 | */ |