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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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1920 | jermar | 42 | #include <ddi/irq.h> |
1 | jermar | 43 | #include <arch/interrupt.h> |
1875 | jermar | 44 | #include <arch/drivers/kbd.h> |
1919 | jermar | 45 | #include <arch/drivers/fhc.h> |
1 | jermar | 46 | #include <cpu.h> |
47 | #include <arch/asm.h> |
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48 | #include <arch.h> |
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508 | jermar | 49 | #include <typedefs.h> |
511 | jermar | 50 | #include <console/chardev.h> |
51 | #include <console/console.h> |
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576 | palkovsky | 52 | #include <interrupt.h> |
1875 | jermar | 53 | #include <sysinfo/sysinfo.h> |
54 | #include <print.h> |
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1 | jermar | 55 | |
670 | vana | 56 | /* |
1842 | jermar | 57 | * These codes read from z8530 data register are silently ignored. |
895 | jermar | 58 | */ |
1842 | jermar | 59 | #define IGNORE_CODE 0x7f /* all keys up */ |
895 | jermar | 60 | |
1875 | jermar | 61 | bool z8530_belongs_to_kernel = true; |
62 | |||
1921 | jermar | 63 | static z8530_t z8530; /**< z8530 device structure. */ |
64 | static irq_t z8530_irq; /**< z8530's IRQ. */ |
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65 | |||
1842 | jermar | 66 | static void z8530_suspend(chardev_t *); |
67 | static void z8530_resume(chardev_t *); |
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511 | jermar | 68 | |
69 | static chardev_operations_t ops = { |
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1842 | jermar | 70 | .suspend = z8530_suspend, |
71 | .resume = z8530_resume, |
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1896 | jermar | 72 | .read = z8530_key_read |
511 | jermar | 73 | }; |
74 | |||
1848 | jermar | 75 | void z8530_wait(void); |
576 | palkovsky | 76 | |
1474 | palkovsky | 77 | /** Initialize keyboard and service interrupts using kernel routine */ |
1842 | jermar | 78 | void z8530_grab(void) |
1 | jermar | 79 | { |
1875 | jermar | 80 | z8530_belongs_to_kernel = true; |
1474 | palkovsky | 81 | } |
1849 | jermar | 82 | |
1474 | palkovsky | 83 | /** Resume the former interrupt vector */ |
1842 | jermar | 84 | void z8530_release(void) |
1474 | palkovsky | 85 | { |
1875 | jermar | 86 | z8530_belongs_to_kernel = false; |
1474 | palkovsky | 87 | } |
670 | vana | 88 | |
1842 | jermar | 89 | /** Initialize z8530. */ |
1921 | jermar | 90 | void z8530_init(devno_t devno, inr_t inr, uintptr_t vaddr) |
1474 | palkovsky | 91 | { |
1842 | jermar | 92 | chardev_initialize("z8530_kbd", &kbrd, &ops); |
511 | jermar | 93 | stdin = &kbrd; |
1195 | jermar | 94 | |
1921 | jermar | 95 | z8530.devno = devno; |
96 | z8530.reg = (uint8_t *) vaddr; |
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97 | |||
98 | irq_initialize(&z8530_irq); |
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99 | z8530_irq.devno = devno; |
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100 | z8530_irq.inr = inr; |
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101 | z8530_irq.claim = z8530_claim; |
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102 | z8530_irq.handler = z8530_irq_handler; |
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103 | irq_register(&z8530_irq); |
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104 | |||
1875 | jermar | 105 | sysinfo_set_item_val("kbd", NULL, true); |
1921 | jermar | 106 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
107 | sysinfo_set_item_val("kbd.inr", NULL, inr); |
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108 | sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr); |
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1875 | jermar | 109 | |
1921 | jermar | 110 | (void) z8530_read_a(&z8530, RR8); |
1849 | jermar | 111 | |
1875 | jermar | 112 | /* |
113 | * Clear any pending TX interrupts or we never manage |
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114 | * to set FHC UART interrupt state to idle. |
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115 | */ |
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1921 | jermar | 116 | z8530_write_a(&z8530, WR0, WR0_TX_IP_RST); |
1848 | jermar | 117 | |
1921 | jermar | 118 | z8530_write_a(&z8530, WR1, WR1_IARCSC); /* interrupt on all characters */ |
1875 | jermar | 119 | |
1848 | jermar | 120 | /* 8 bits per character and enable receiver */ |
1921 | jermar | 121 | z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE); |
1848 | jermar | 122 | |
1921 | jermar | 123 | z8530_write_a(&z8530, WR9, WR9_MIE); /* Master Interrupt Enable. */ |
1 | jermar | 124 | } |
125 | |||
1842 | jermar | 126 | /** Process z8530 interrupt. |
508 | jermar | 127 | * |
128 | * @param n Interrupt vector. |
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1708 | jermar | 129 | * @param istate Interrupted state. |
508 | jermar | 130 | */ |
1849 | jermar | 131 | void z8530_interrupt(void) |
1 | jermar | 132 | { |
1849 | jermar | 133 | z8530_poll(); |
1 | jermar | 134 | } |
508 | jermar | 135 | |
895 | jermar | 136 | /** Wait until the controller reads its data. */ |
1842 | jermar | 137 | void z8530_wait(void) { |
895 | jermar | 138 | } |
139 | |||
511 | jermar | 140 | /* Called from getc(). */ |
1842 | jermar | 141 | void z8530_resume(chardev_t *d) |
511 | jermar | 142 | { |
143 | } |
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144 | |||
145 | /* Called from getc(). */ |
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1842 | jermar | 146 | void z8530_suspend(chardev_t *d) |
511 | jermar | 147 | { |
148 | } |
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878 | vana | 149 | |
1896 | jermar | 150 | char z8530_key_read(chardev_t *d) |
878 | vana | 151 | { |
152 | char ch; |
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153 | |||
894 | jermar | 154 | while(!(ch = active_read_buff_read())) { |
1780 | jermar | 155 | uint8_t x; |
1921 | jermar | 156 | while (!(z8530_read_a(&z8530, RR0) & RR0_RCA)) |
894 | jermar | 157 | ; |
1921 | jermar | 158 | x = z8530_read_a(&z8530, RR8); |
895 | jermar | 159 | if (x != IGNORE_CODE) { |
160 | if (x & KEY_RELEASE) |
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161 | key_released(x ^ KEY_RELEASE); |
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162 | else |
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163 | active_read_key_pressed(x); |
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164 | } |
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878 | vana | 165 | } |
166 | return ch; |
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167 | } |
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895 | jermar | 168 | |
169 | /** Poll for key press and release events. |
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170 | * |
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171 | * This function can be used to implement keyboard polling. |
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172 | */ |
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1842 | jermar | 173 | void z8530_poll(void) |
895 | jermar | 174 | { |
1780 | jermar | 175 | uint8_t x; |
895 | jermar | 176 | |
1921 | jermar | 177 | while (z8530_read_a(&z8530, RR0) & RR0_RCA) { |
178 | x = z8530_read_a(&z8530, RR8); |
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895 | jermar | 179 | if (x != IGNORE_CODE) { |
180 | if (x & KEY_RELEASE) |
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181 | key_released(x ^ KEY_RELEASE); |
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182 | else |
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183 | key_pressed(x); |
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184 | } |
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185 | } |
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186 | } |
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1702 | cejka | 187 | |
1919 | jermar | 188 | irq_ownership_t z8530_claim(void) |
189 | { |
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1921 | jermar | 190 | return (z8530_read_a(&z8530, RR0) & RR0_RCA); |
1919 | jermar | 191 | } |
192 | |||
193 | void z8530_irq_handler(irq_t *irq, void *arg, ...) |
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194 | { |
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195 | /* |
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196 | * So far, we know we got this interrupt through the FHC. |
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197 | * Since we don't have enough information about the FHC and |
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198 | * because the interrupt looks like level sensitive, |
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199 | * we cannot handle it by scheduling one of the level |
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200 | * interrupt traps. Process the interrupt directly. |
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201 | */ |
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202 | if (z8530_belongs_to_kernel) |
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203 | z8530_interrupt(); |
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204 | else |
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205 | ipc_irq_send_notif(0); |
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206 | fhc_clear_interrupt(central_fhc, irq->inr); |
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207 | } |
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208 | |||
1754 | jermar | 209 | /** @} |
1702 | cejka | 210 | */ |