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| Rev | Author | Line No. | Line |
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| 4629 | pillai | 1 | /* |
| 2 | * Copyright (c) 2009 Vineeth Pillai |
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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 | /** |
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| 33 | * @file |
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| 34 | * @brief pl050 keyboard/mouse driver. |
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| 35 | * |
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| 36 | * It takes care of low-level keyboard functions. |
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| 37 | */ |
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| 38 | |||
| 39 | #include <genarch/kbd/key.h> |
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| 40 | #include <cpu.h> |
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| 41 | #include <arch/asm.h> |
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| 42 | #include <arch.h> |
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| 43 | #include <arch/drivers/pl050.h> |
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| 44 | #include <console/console.h> |
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| 45 | #include <interrupt.h> |
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| 46 | #include <sysinfo/sysinfo.h> |
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| 47 | #include <ipc/irq.h> |
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| 48 | |||
| 49 | #include <arch/debug/print.h> |
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| 50 | #include <genarch/fb/fb.h> |
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| 51 | #include <genarch/fb/visuals.h> |
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| 52 | #include <print.h> |
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| 53 | |||
| 54 | #define PL050_KEY_RELEASE 0xF0 |
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| 55 | #define PL050_ESC_KEY 0xE0 |
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| 56 | |||
| 57 | static void pl050_suspend(chardev_t *); |
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| 58 | static void pl050_resume(chardev_t *); |
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| 59 | |||
| 60 | static chardev_operations_t ops = { |
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| 61 | .suspend = pl050_suspend, |
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| 62 | .resume = pl050_resume, |
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| 63 | .read = pl050_key_read |
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| 64 | }; |
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| 65 | |||
| 66 | /** Structure for pl050's IRQ. */ |
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| 67 | static irq_t pl050_kbd_irq; |
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| 68 | /* static irq_t pl050_mouse_irq; */ |
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| 69 | static uintptr_t pl050_kbd_pbase; |
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| 70 | static uintptr_t pl050_kbd_vbase; |
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| 71 | |||
| 72 | uint8_t pl050_dataread(void) |
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| 73 | { |
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| 74 | return *(uint8_t *)(pl050_kbd_vbase + PL050_DATA); |
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| 75 | } |
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| 76 | |||
| 77 | uint8_t pl050_statusread(void) |
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| 78 | { |
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| 79 | return *(uint8_t *)(pl050_kbd_vbase + PL050_STAT); |
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| 80 | } |
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| 81 | |||
| 82 | void pl050_crwrite(uint8_t val) |
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| 83 | { |
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| 84 | *(uint8_t *)pl050_kbd_vbase = val; |
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| 85 | } |
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| 86 | |||
| 87 | |||
| 88 | void pl050_grab(void) |
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| 89 | { |
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| 90 | ipl_t ipl = interrupts_disable(); |
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| 91 | |||
| 92 | spinlock_lock(&pl050_kbd_irq.lock); |
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| 93 | pl050_kbd_irq.notif_cfg.notify = false; |
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| 94 | spinlock_unlock(&pl050_kbd_irq.lock); |
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| 95 | |||
| 96 | interrupts_restore(ipl); |
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| 97 | } |
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| 98 | |||
| 99 | void pl050_release(void) |
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| 100 | { |
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| 101 | ipl_t ipl = interrupts_disable(); |
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| 102 | |||
| 103 | spinlock_lock(&pl050_kbd_irq.lock); |
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| 104 | if (pl050_kbd_irq.notif_cfg.answerbox) |
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| 105 | pl050_kbd_irq.notif_cfg.notify = true; |
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| 106 | spinlock_unlock(&pl050_kbd_irq.lock); |
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| 107 | |||
| 108 | interrupts_restore(ipl); |
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| 109 | } |
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| 110 | |||
| 111 | static irq_ownership_t pl050_claim(void) |
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| 112 | { |
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| 113 | return IRQ_ACCEPT; |
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| 114 | } |
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| 115 | |||
| 116 | static void pl050_irq_handler(irq_t *irq, void *arg, ...) |
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| 117 | { |
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| 118 | static int key_released_flag = 0; |
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| 119 | static uint8_t prev_char = 0xFF; |
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| 120 | |||
| 121 | if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
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| 122 | ipc_irq_send_notif(irq); |
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| 123 | else { |
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| 124 | uint8_t data; |
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| 125 | uint8_t status; |
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| 126 | |||
| 127 | if (((status = pl050_statusread()) & PL050_STAT_RXFULL)) { |
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| 128 | data = pl050_dataread(); |
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| 129 | |||
| 130 | if (data == PL050_ESC_KEY) |
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| 131 | return; |
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| 132 | |||
| 133 | if (data == PL050_KEY_RELEASE) { |
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| 134 | key_released_flag = 1; |
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| 135 | } else { |
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| 136 | if (key_released_flag && prev_char == data) { |
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| 137 | prev_char = 0xFF; |
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| 138 | key_released(data); |
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| 139 | } else { |
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| 140 | key_pressed(data); |
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| 141 | prev_char = data; |
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| 142 | } |
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| 143 | key_released_flag = 0; |
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| 144 | } |
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| 145 | } |
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| 146 | } |
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| 147 | } |
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| 148 | |||
| 149 | /** Initialize pl050. */ |
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| 150 | void pl050_init(devno_t kbd_devno, inr_t kbd_inr, uintptr_t pbase, uintptr_t vbase) |
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| 151 | { |
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| 152 | uint8_t val = 0; |
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| 153 | chardev_initialize("pl050_kbd", &kbrd, &ops); |
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| 154 | stdin = &kbrd; |
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| 155 | |||
| 156 | irq_initialize(&pl050_kbd_irq); |
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| 157 | pl050_kbd_irq.devno = kbd_devno; |
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| 158 | pl050_kbd_irq.inr = kbd_inr; |
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| 159 | pl050_kbd_irq.claim = pl050_claim; |
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| 160 | pl050_kbd_irq.handler = pl050_irq_handler; |
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| 161 | pl050_kbd_pbase = pbase; |
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| 162 | pl050_kbd_vbase = vbase; |
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| 163 | irq_register(&pl050_kbd_irq); |
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| 164 | val = PL050_CR_RXINTR | PL050_CR_INTR | PL050_CR_FKMIC; |
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| 165 | |||
| 166 | pl050_crwrite(val); |
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| 167 | |||
| 168 | /* reset the data buffer */ |
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| 169 | pl050_dataread(); |
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| 170 | |||
| 171 | sysinfo_set_item_val("kbd", NULL, true); |
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| 172 | sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
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| 173 | sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
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| 174 | sysinfo_set_item_val("kbd.pbase", NULL, pl050_kbd_pbase); |
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| 175 | sysinfo_set_item_val("kbd.vbase", NULL, vbase); |
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| 176 | |||
| 177 | pl050_grab(); |
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| 178 | } |
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| 179 | |||
| 180 | /* Called from getc(). */ |
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| 181 | void pl050_resume(chardev_t *d) |
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| 182 | { |
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| 183 | } |
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| 184 | |||
| 185 | /* Called from getc(). */ |
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| 186 | void pl050_suspend(chardev_t *d) |
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| 187 | { |
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| 188 | } |
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| 189 | |||
| 190 | char pl050_key_read(chardev_t *d) |
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| 191 | { |
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| 192 | char ch; |
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| 193 | |||
| 194 | while(!(ch = active_read_buff_read())) { |
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| 195 | uint8_t x; |
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| 196 | while (!(pl050_statusread() & PL050_STAT_RXFULL)) |
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| 197 | ; |
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| 198 | x = pl050_dataread(); |
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| 199 | if (x & KEY_RELEASE) |
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| 200 | key_released(x ^ KEY_RELEASE); |
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| 201 | else |
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| 202 | active_read_key_pressed(x); |
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| 203 | } |
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| 204 | return ch; |
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| 205 | } |
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| 206 | |||
| 207 | /** Poll for key press and release events. |
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| 208 | * |
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| 209 | * This function can be used to implement keyboard polling. |
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| 210 | */ |
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| 211 | void pl050_poll(void) |
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| 212 | { |
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| 213 | uint8_t x; |
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| 214 | |||
| 215 | while (((x = pl050_statusread() & PL050_STAT_RXFULL))) { |
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| 216 | x = pl050_dataread(); |
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| 217 | if (x & KEY_RELEASE) |
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| 218 | key_released(x ^ KEY_RELEASE); |
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| 219 | else |
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| 220 | key_pressed(x); |
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| 221 | } |
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| 222 | } |
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| 223 | |||
| 224 | /** @} |
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| 225 | */ |