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Diffstat (limited to 'sys/arch/amd64/isa/i8042.c')
-rw-r--r--sys/arch/amd64/isa/i8042.c297
1 files changed, 0 insertions, 297 deletions
diff --git a/sys/arch/amd64/isa/i8042.c b/sys/arch/amd64/isa/i8042.c
deleted file mode 100644
index 8c790ec..0000000
--- a/sys/arch/amd64/isa/i8042.c
+++ /dev/null
@@ -1,297 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#include <sys/types.h>
-#include <sys/driver.h>
-#include <sys/errno.h>
-#include <sys/spinlock.h>
-#include <sys/tty.h>
-#include <sys/intr.h>
-#include <machine/ioapic.h>
-#include <machine/idt.h>
-#include <machine/io.h>
-#include <machine/lapic.h>
-#include <machine/hpet.h>
-#include <machine/sysvec.h>
-#include <machine/isa/i8042regs.h>
-
-__MODULE_NAME("i8042");
-__KERNEL_META("$Hyra$: i8042.c, Ian Marco Moffett, "
- "i8042 PS/2 driver");
-
-static struct spinlock data_lock;
-static bool shift_key = false;
-static bool capslock = false;
-static bool capslock_released = true;
-static struct intr_info *irq_info;
-
-static int dev_send(bool aux, uint8_t data);
-
-static char keytab[] = {
- '\0', '\0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
- '-', '=', '\b', '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i',
- 'o', 'p', '[', ']', '\n', '\0', 'a', 's', 'd', 'f', 'g', 'h',
- 'j', 'k', 'l', ';', '\'', '`', '\0', '\\', 'z', 'x', 'c', 'v',
- 'b', 'n', 'm', ',', '.', '/', '\0', '\0', '\0', ' '
-};
-
-static char keytab_shift[] = {
- '\0', '\0', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')',
- '_', '+', '\b', '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
- 'O', 'P', '{', '}', '\n', '\0', 'A', 'S', 'D', 'F', 'G', 'H',
- 'J', 'K', 'L', ':', '\"', '~', '\0', '|', 'Z', 'X', 'C', 'V',
- 'B', 'N', 'M', '<', '>', '?', '\0', '\0', '\0', ' '
-};
-
-static char keytab_caps[] = {
- '\0', '\0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
- '-','=', '\b', '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I',
- 'O', 'P', '[', ']', '\n', '\0', 'A', 'S', 'D', 'F', 'G', 'H',
- 'J', 'K', 'L', ';', '\'', '`', '\0', '\\', 'Z', 'X', 'C', 'V',
- 'B', 'N', 'M', ',', '.', '/', '\0', '\0', '\0', ' '
-};
-
-static void
-kbd_set_leds(uint8_t mask)
-{
- dev_send(false, 0xED);
- dev_send(false, mask);
-}
-
-/*
- * Convert scancode to character
- *
- * @sc: Scancode
- * @chr: Character output
- *
- * Returns 0 when a char is given back.
- */
-static int
-scancode_to_chr(uint8_t sc, char *chr)
-{
- bool release = __TEST(sc, __BIT(7));
-
- switch (sc) {
- /* Capslock pressed */
- case 0x3A:
- /*
- * If we are holding down caps-lock, we do not
- * want a stream of presses that constantly cause
- * it to toggle, only toggle if released then pushed
- * again.
- */
- if (!capslock_released)
- return -EAGAIN;
-
- capslock_released = false;
- capslock = !capslock;
-
- if (!capslock) {
- kbd_set_leds(0);
- } else {
- kbd_set_leds(I8042_LED_CAPS);
- }
- return -EAGAIN;
- /* Capslock released */
- case 0xBA:
- capslock_released = true;
- return -EAGAIN;
- /* Shift */
- case 0x36:
- case 0xAA:
- case 0x2A:
- case 0xB6:
- if (!release) {
- shift_key = true;
- } else {
- shift_key = false;
- }
- return -EAGAIN;
- }
-
- if (release) {
- return -EAGAIN;
- }
-
- if (capslock) {
- *chr = keytab_caps[sc];
- return 0;
- }
-
- if (shift_key) {
- *chr = keytab_shift[sc];
- return 0;
- }
-
- *chr = keytab[sc];
- return 0;
-}
-
-/*
- * Write to an i8042 register.
- *
- * @port: I/O port
- * @val: Value to write
- */
-static void
-i8042_write(uint16_t port, uint8_t val)
-{
- while (__TEST(I8042_STATUS, I8042_IBUF_FULL));
- outb(port, val);
-}
-
-/*
- * Read the i8042 config register
- */
-static uint8_t
-i8042_read_conf(void)
-{
- i8042_write(I8042_COMMAND, I8042_GET_CONFB);
- return inb(I8042_DATA);
-}
-
-/*
- * Write the i8042 config register
- */
-static void
-i8042_write_conf(uint8_t value)
-{
- i8042_write(I8042_COMMAND, I8042_SET_CONFB);
- i8042_write(I8042_DATA, value);
-}
-
-/*
- * Flush the data register until it is empty.
- */
-static void
-i8042_drain(void)
-{
- spinlock_acquire(&data_lock);
- while (__TEST(inb(I8042_STATUS), I8042_OBUF_FULL)) {
- inb(I8042_DATA);
- }
-
- spinlock_release(&data_lock);
-}
-
-/*
- * Send a data to a device
- *
- * @aux: If true, send to aux device (mouse)
- * @data: Data to send.
- */
-static int
-dev_send(bool aux, uint8_t data)
-{
- if (aux) {
- i8042_write(I8042_COMMAND, I8042_PORT1_SEND);
- }
-
- for (;;) {
- if (!__TEST(inb(I8042_STATUS), I8042_IBUF_FULL)) {
- break;
- }
- }
-
- i8042_write(I8042_DATA, data);
- inb(0x80); /* Waste a cycle */
- return inb(I8042_DATA);
-}
-
-__attr(interrupt)
-static void
-kb_isr(void *sf)
-{
- uint8_t data;
- char c;
-
- spinlock_acquire(&irq_info->lock);
- ++irq_info->count;
- spinlock_release(&irq_info->lock);
-
- spinlock_acquire(&data_lock);
- while (__TEST(inb(I8042_STATUS), I8042_OBUF_FULL)) {
- data = inb(I8042_DATA);
- if (scancode_to_chr(data, &c) == 0) {
- tty_putc(&g_root_tty, c, TTY_SOURCE_DEV);
- }
- }
- spinlock_release(&data_lock);
- lapic_send_eoi();
-}
-
-static int
-i8042_init(void)
-{
- uint8_t conf;
-
- /*
- * Disable the ports and drain the output buffer
- * to avoid interferance with the initialization
- * process.
- */
- i8042_write(I8042_COMMAND, I8042_DISABLE_PORT0);
- i8042_write(I8042_COMMAND, I8042_DISABLE_PORT1);
- i8042_drain();
-
- /* Disable aux data streaming */
- dev_send(true, I8042_AUX_DISABLE);
- i8042_drain();
-
- /* Setup kbd interrupts */
- idt_set_desc(SYSVEC_PCKBD, IDT_INT_GATE_FLAGS, (uintptr_t)kb_isr, 0);
- ioapic_set_vec(1, SYSVEC_PCKBD);
- ioapic_irq_unmask(1);
-
- /* Register the interrupt */
- irq_info = intr_info_alloc("IOAPIC", "i8042");
- irq_info->affinity = 0;
- intr_register(irq_info);
-
- /* Setup config bits */
- conf = i8042_read_conf();
- conf |= I8042_PORT0_INTR;
- conf &= ~I8042_PORT1_INTR;
- i8042_write_conf(conf);
-
- /* Enable the keyboard */
- i8042_write(I8042_COMMAND, I8042_ENABLE_PORT0);
-
- /*
- * It seems one I/O bus cycle isn't enough to wait for data
- * to accumulate on some machines... Give it around 50ms then
- * drain the output buffer.
- */
- hpet_msleep(50);
- i8042_drain();
- return 0;
-}
-
-DRIVER_EXPORT(i8042_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 10:39:09 +0000