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| Rev | Author | Line No. | Line |
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| 1844 | jermar | 1 | /* |
| 3982 | jermar | 2 | * Copyright (c) 2009 Jakub Jermar |
| 1844 | jermar | 3 | * All rights reserved. |
| 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 genarch |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** |
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| 33 | * @file |
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| 34 | * @brief NS 16550 serial port / keyboard driver. |
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| 35 | */ |
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| 36 | |||
| 37 | #include <genarch/kbd/ns16550.h> |
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| 38 | #include <genarch/kbd/key.h> |
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| 39 | #include <genarch/kbd/scanc.h> |
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| 40 | #include <genarch/kbd/scanc_sun.h> |
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| 3657 | vana | 41 | #include <arch/drivers/kbd.h> |
| 1920 | jermar | 42 | #include <ddi/irq.h> |
| 1844 | jermar | 43 | #include <cpu.h> |
| 44 | #include <arch/asm.h> |
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| 45 | #include <arch.h> |
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| 46 | #include <console/chardev.h> |
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| 47 | #include <console/console.h> |
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| 48 | #include <interrupt.h> |
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| 1931 | jermar | 49 | #include <arch/interrupt.h> |
| 50 | #include <synch/spinlock.h> |
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| 3934 | jermar | 51 | #include <mm/slab.h> |
| 1844 | jermar | 52 | |
| 53 | #define LSR_DATA_READY 0x01 |
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| 54 | |||
| 55 | /* |
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| 56 | * These codes read from ns16550 data register are silently ignored. |
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| 57 | */ |
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| 58 | #define IGNORE_CODE 0x7f /* all keys up */ |
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| 59 | |||
| 60 | static void ns16550_suspend(chardev_t *); |
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| 61 | static void ns16550_resume(chardev_t *); |
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| 62 | |||
| 63 | static chardev_operations_t ops = { |
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| 64 | .suspend = ns16550_suspend, |
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| 65 | .resume = ns16550_resume, |
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| 66 | }; |
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| 67 | |||
| 1921 | jermar | 68 | /** Initialize ns16550. |
| 69 | * |
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| 3934 | jermar | 70 | * @param dev Addrress of the beginning of the device in I/O space. |
| 3655 | jermar | 71 | * @param devno Device number. |
| 72 | * @param inr Interrupt number. |
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| 73 | * @param cir Clear interrupt function. |
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| 74 | * @param cir_arg First argument to cir. |
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| 3934 | jermar | 75 | * |
| 76 | * @return True on success, false on failure. |
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| 1921 | jermar | 77 | */ |
| 3934 | jermar | 78 | bool |
| 79 | ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg) |
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| 1844 | jermar | 80 | { |
| 3934 | jermar | 81 | ns16550_instance_t *instance; |
| 82 | |||
| 1844 | jermar | 83 | chardev_initialize("ns16550_kbd", &kbrd, &ops); |
| 84 | stdin = &kbrd; |
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| 1880 | jermar | 85 | |
| 3934 | jermar | 86 | instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC); |
| 87 | if (!instance) |
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| 88 | return false; |
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| 89 | |||
| 90 | instance->devno = devno; |
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| 91 | instance->ns16550 = dev; |
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| 1921 | jermar | 92 | |
| 3938 | jermar | 93 | irq_initialize(&instance->irq); |
| 94 | instance->irq.devno = devno; |
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| 95 | instance->irq.inr = inr; |
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| 96 | instance->irq.claim = ns16550_claim; |
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| 97 | instance->irq.handler = ns16550_irq_handler; |
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| 98 | instance->irq.instance = instance; |
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| 99 | instance->irq.cir = cir; |
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| 100 | instance->irq.cir_arg = cir_arg; |
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| 101 | irq_register(&instance->irq); |
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| 3934 | jermar | 102 | |
| 3938 | jermar | 103 | while ((pio_read_8(&dev->lsr) & LSR_DATA_READY)) |
| 3934 | jermar | 104 | (void) pio_read_8(&dev->rbr); |
| 1921 | jermar | 105 | |
| 3646 | jermar | 106 | /* Enable interrupts */ |
| 3934 | jermar | 107 | pio_write_8(&dev->ier, IER_ERBFI); |
| 108 | pio_write_8(&dev->mcr, MCR_OUT2); |
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| 1911 | jermar | 109 | |
| 3934 | jermar | 110 | return true; |
| 1844 | jermar | 111 | } |
| 112 | |||
| 113 | /* Called from getc(). */ |
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| 114 | void ns16550_resume(chardev_t *d) |
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| 115 | { |
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| 116 | } |
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| 117 | |||
| 118 | /* Called from getc(). */ |
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| 119 | void ns16550_suspend(chardev_t *d) |
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| 120 | { |
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| 121 | } |
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| 122 | |||
| 3941 | jermar | 123 | irq_ownership_t ns16550_claim(irq_t *irq) |
| 1844 | jermar | 124 | { |
| 3941 | jermar | 125 | ns16550_instance_t *ns16550_instance = irq->instance; |
| 3934 | jermar | 126 | ns16550_t *dev = ns16550_instance->ns16550; |
| 1844 | jermar | 127 | |
| 3934 | jermar | 128 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) |
| 129 | return IRQ_ACCEPT; |
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| 130 | else |
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| 131 | return IRQ_DECLINE; |
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| 1844 | jermar | 132 | } |
| 133 | |||
| 3934 | jermar | 134 | void ns16550_irq_handler(irq_t *irq) |
| 1844 | jermar | 135 | { |
| 3934 | jermar | 136 | ns16550_instance_t *ns16550_instance = irq->instance; |
| 137 | ns16550_t *dev = ns16550_instance->ns16550; |
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| 138 | |||
| 139 | if (pio_read_8(&dev->lsr) & LSR_DATA_READY) { |
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| 1931 | jermar | 140 | uint8_t x; |
| 141 | |||
| 3934 | jermar | 142 | x = pio_read_8(&dev->rbr); |
| 3877 | decky | 143 | |
| 1844 | jermar | 144 | if (x != IGNORE_CODE) { |
| 145 | if (x & KEY_RELEASE) |
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| 146 | key_released(x ^ KEY_RELEASE); |
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| 147 | else |
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| 148 | key_pressed(x); |
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| 149 | } |
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| 150 | } |
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| 151 | |||
| 1919 | jermar | 152 | } |
| 153 | |||
| 1844 | jermar | 154 | /** @} |
| 155 | */ |