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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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41 | #include <arch/drivers/z8530.h> |
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1 | jermar | 42 | #include <arch/interrupt.h> |
1875 | jermar | 43 | #include <arch/drivers/kbd.h> |
1 | jermar | 44 | #include <cpu.h> |
45 | #include <arch/asm.h> |
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46 | #include <arch.h> |
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508 | jermar | 47 | #include <typedefs.h> |
511 | jermar | 48 | #include <console/chardev.h> |
49 | #include <console/console.h> |
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576 | palkovsky | 50 | #include <interrupt.h> |
1875 | jermar | 51 | #include <sysinfo/sysinfo.h> |
52 | #include <print.h> |
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1 | jermar | 53 | |
670 | vana | 54 | /* |
1842 | jermar | 55 | * These codes read from z8530 data register are silently ignored. |
895 | jermar | 56 | */ |
1842 | jermar | 57 | #define IGNORE_CODE 0x7f /* all keys up */ |
895 | jermar | 58 | |
1875 | jermar | 59 | bool z8530_belongs_to_kernel = true; |
60 | |||
1842 | jermar | 61 | static void z8530_suspend(chardev_t *); |
62 | static void z8530_resume(chardev_t *); |
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511 | jermar | 63 | |
64 | static chardev_operations_t ops = { |
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1842 | jermar | 65 | .suspend = z8530_suspend, |
66 | .resume = z8530_resume, |
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1896 | jermar | 67 | .read = z8530_key_read |
511 | jermar | 68 | }; |
69 | |||
1848 | jermar | 70 | void z8530_wait(void); |
576 | palkovsky | 71 | |
1474 | palkovsky | 72 | /** Initialize keyboard and service interrupts using kernel routine */ |
1842 | jermar | 73 | void z8530_grab(void) |
1 | jermar | 74 | { |
1875 | jermar | 75 | z8530_belongs_to_kernel = true; |
1474 | palkovsky | 76 | } |
1849 | jermar | 77 | |
1474 | palkovsky | 78 | /** Resume the former interrupt vector */ |
1842 | jermar | 79 | void z8530_release(void) |
1474 | palkovsky | 80 | { |
1875 | jermar | 81 | z8530_belongs_to_kernel = false; |
1474 | palkovsky | 82 | } |
670 | vana | 83 | |
1842 | jermar | 84 | /** Initialize z8530. */ |
85 | void z8530_init(void) |
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1474 | palkovsky | 86 | { |
1842 | jermar | 87 | chardev_initialize("z8530_kbd", &kbrd, &ops); |
511 | jermar | 88 | stdin = &kbrd; |
1195 | jermar | 89 | |
1875 | jermar | 90 | sysinfo_set_item_val("kbd", NULL, true); |
91 | sysinfo_set_item_val("kbd.irq", NULL, 0); |
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92 | sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address); |
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93 | |||
1849 | jermar | 94 | (void) z8530_read_a(RR8); |
95 | |||
1875 | jermar | 96 | /* |
97 | * Clear any pending TX interrupts or we never manage |
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98 | * to set FHC UART interrupt state to idle. |
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99 | */ |
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100 | z8530_write_a(WR0, WR0_TX_IP_RST); |
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1848 | jermar | 101 | |
1875 | jermar | 102 | z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */ |
103 | |||
1848 | jermar | 104 | /* 8 bits per character and enable receiver */ |
105 | z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE); |
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106 | |||
1875 | jermar | 107 | z8530_write_a(WR9, WR9_MIE); /* Master Interrupt Enable. */ |
1 | jermar | 108 | } |
109 | |||
1842 | jermar | 110 | /** Process z8530 interrupt. |
508 | jermar | 111 | * |
112 | * @param n Interrupt vector. |
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1708 | jermar | 113 | * @param istate Interrupted state. |
508 | jermar | 114 | */ |
1849 | jermar | 115 | void z8530_interrupt(void) |
1 | jermar | 116 | { |
1849 | jermar | 117 | z8530_poll(); |
1 | jermar | 118 | } |
508 | jermar | 119 | |
895 | jermar | 120 | /** Wait until the controller reads its data. */ |
1842 | jermar | 121 | void z8530_wait(void) { |
895 | jermar | 122 | } |
123 | |||
511 | jermar | 124 | /* Called from getc(). */ |
1842 | jermar | 125 | void z8530_resume(chardev_t *d) |
511 | jermar | 126 | { |
127 | } |
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128 | |||
129 | /* Called from getc(). */ |
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1842 | jermar | 130 | void z8530_suspend(chardev_t *d) |
511 | jermar | 131 | { |
132 | } |
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878 | vana | 133 | |
1896 | jermar | 134 | char z8530_key_read(chardev_t *d) |
878 | vana | 135 | { |
136 | char ch; |
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137 | |||
894 | jermar | 138 | while(!(ch = active_read_buff_read())) { |
1780 | jermar | 139 | uint8_t x; |
1848 | jermar | 140 | while (!(z8530_read_a(RR0) & RR0_RCA)) |
894 | jermar | 141 | ; |
1848 | jermar | 142 | x = z8530_read_a(RR8); |
895 | jermar | 143 | if (x != IGNORE_CODE) { |
144 | if (x & KEY_RELEASE) |
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145 | key_released(x ^ KEY_RELEASE); |
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146 | else |
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147 | active_read_key_pressed(x); |
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148 | } |
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878 | vana | 149 | } |
150 | return ch; |
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151 | } |
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895 | jermar | 152 | |
153 | /** Poll for key press and release events. |
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154 | * |
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155 | * This function can be used to implement keyboard polling. |
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156 | */ |
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1842 | jermar | 157 | void z8530_poll(void) |
895 | jermar | 158 | { |
1780 | jermar | 159 | uint8_t x; |
895 | jermar | 160 | |
1848 | jermar | 161 | while (z8530_read_a(RR0) & RR0_RCA) { |
162 | x = z8530_read_a(RR8); |
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895 | jermar | 163 | if (x != IGNORE_CODE) { |
164 | if (x & KEY_RELEASE) |
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165 | key_released(x ^ KEY_RELEASE); |
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166 | else |
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167 | key_pressed(x); |
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168 | } |
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169 | } |
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170 | } |
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1702 | cejka | 171 | |
1754 | jermar | 172 | /** @} |
1702 | cejka | 173 | */ |