0,0 → 1,234 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
*/ |
|
/** @addtogroup genarch |
* @{ |
*/ |
/** |
* @file |
* @brief i8042 processor driver. |
* |
* It takes care of low-level keyboard functions. |
*/ |
|
#include <genarch/kbd/i8042.h> |
#include <arch/drivers/kbd.h> |
#include <genarch/kbd/key.h> |
#include <genarch/kbd/scanc.h> |
#include <genarch/kbd/scanc_pc.h> |
#include <cpu.h> |
#include <arch/asm.h> |
#include <arch.h> |
#include <console/chardev.h> |
#include <console/console.h> |
#include <interrupt.h> |
#include <sysinfo/sysinfo.h> |
#include <ipc/irq.h> |
|
#define i8042_DATA 0x60 |
#define i8042_STATUS 0x64 |
|
/* Keyboard commands. */ |
#define KBD_ENABLE 0xf4 |
#define KBD_DISABLE 0xf5 |
#define KBD_ACK 0xfa |
|
/* |
* 60 Write 8042 Command Byte: next data byte written to port 60h is |
* placed in 8042 command register. Format: |
* |
* |7|6|5|4|3|2|1|0|8042 Command Byte |
* | | | | | | | `---- 1=enable output register full interrupt |
* | | | | | | `----- should be 0 |
* | | | | | `------ 1=set status register system, 0=clear |
* | | | | `------- 1=override keyboard inhibit, 0=allow inhibit |
* | | | `-------- disable keyboard I/O by driving clock line low |
* | | `--------- disable auxiliary device, drives clock line low |
* | `---------- IBM scancode translation 0=AT, 1=PC/XT |
* `----------- reserved, should be 0 |
*/ |
|
#define i8042_SET_COMMAND 0x60 |
#define i8042_COMMAND 0x69 |
|
#define i8042_BUFFER_FULL_MASK 0x01 |
#define i8042_WAIT_MASK 0x02 |
#define i8042_MOUSE_DATA 0x20 |
|
static void i8042_suspend(chardev_t *); |
static void i8042_resume(chardev_t *); |
|
static chardev_operations_t ops = { |
.suspend = i8042_suspend, |
.resume = i8042_resume, |
.read = i8042_key_read |
}; |
|
/** Structure for i8042's IRQ. */ |
static irq_t i8042_kbd_irq; |
static irq_t i8042_mouse_irq; |
|
void i8042_grab(void) |
{ |
ipl_t ipl = interrupts_disable(); |
|
spinlock_lock(&i8042_kbd_irq.lock); |
i8042_kbd_irq.notif_cfg.notify = false; |
spinlock_unlock(&i8042_kbd_irq.lock); |
|
spinlock_lock(&i8042_mouse_irq.lock); |
i8042_mouse_irq.notif_cfg.notify = false; |
spinlock_unlock(&i8042_mouse_irq.lock); |
|
interrupts_restore(ipl); |
} |
|
void i8042_release(void) |
{ |
ipl_t ipl = interrupts_disable(); |
|
spinlock_lock(&i8042_kbd_irq.lock); |
if (i8042_kbd_irq.notif_cfg.answerbox) |
i8042_kbd_irq.notif_cfg.notify = true; |
spinlock_unlock(&i8042_kbd_irq.lock); |
|
spinlock_lock(&i8042_mouse_irq.lock); |
if (i8042_mouse_irq.notif_cfg.answerbox) |
i8042_mouse_irq.notif_cfg.notify = true; |
spinlock_unlock(&i8042_mouse_irq.lock); |
|
interrupts_restore(ipl); |
} |
|
static irq_ownership_t i8042_claim(void *instance) |
{ |
return IRQ_ACCEPT; |
} |
|
static void i8042_irq_handler(irq_t *irq) |
{ |
if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
ipc_irq_send_notif(irq); |
else { |
uint8_t data; |
uint8_t status; |
|
while (((status = pio_read_8(i8042_STATUS)) & |
i8042_BUFFER_FULL_MASK)) { |
data = pio_read_8(i8042_DATA); |
|
if ((status & i8042_MOUSE_DATA)) |
continue; |
|
if (data & KEY_RELEASE) |
key_released(data ^ KEY_RELEASE); |
else |
key_pressed(data); |
} |
} |
} |
|
/** Initialize i8042. */ |
void |
i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, |
inr_t mouse_inr) |
{ |
chardev_initialize("i8042_kbd", &kbrd, &ops); |
stdin = &kbrd; |
|
irq_initialize(&i8042_kbd_irq); |
i8042_kbd_irq.devno = kbd_devno; |
i8042_kbd_irq.inr = kbd_inr; |
i8042_kbd_irq.claim = i8042_claim; |
i8042_kbd_irq.handler = i8042_irq_handler; |
irq_register(&i8042_kbd_irq); |
|
irq_initialize(&i8042_mouse_irq); |
i8042_mouse_irq.devno = mouse_devno; |
i8042_mouse_irq.inr = mouse_inr; |
i8042_mouse_irq.claim = i8042_claim; |
i8042_mouse_irq.handler = i8042_irq_handler; |
irq_register(&i8042_mouse_irq); |
|
trap_virtual_enable_irqs(1 << kbd_inr); |
trap_virtual_enable_irqs(1 << mouse_inr); |
|
/* |
* Clear input buffer. |
* Number of iterations is limited to prevent infinite looping. |
*/ |
int i; |
for (i = 0; (pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK) && |
i < 100; i++) { |
(void) pio_read_8(i8042_DATA); |
} |
|
sysinfo_set_item_val("kbd", NULL, true); |
sysinfo_set_item_val("kbd.devno", NULL, kbd_devno); |
sysinfo_set_item_val("kbd.inr", NULL, kbd_inr); |
#ifdef KBD_LEGACY |
sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY); |
#endif |
sysinfo_set_item_val("mouse", NULL, true); |
sysinfo_set_item_val("mouse.devno", NULL, mouse_devno); |
sysinfo_set_item_val("mouse.inr", NULL, mouse_inr); |
|
i8042_grab(); |
} |
|
/* Called from getc(). */ |
void i8042_resume(chardev_t *d) |
{ |
} |
|
/* Called from getc(). */ |
void i8042_suspend(chardev_t *d) |
{ |
} |
|
char i8042_key_read(chardev_t *d) |
{ |
char ch; |
|
while (!(ch = active_read_buff_read())) { |
uint8_t x; |
|
while (!(pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK)) |
; |
|
x = pio_read_8(i8042_STATUS); |
if (x & KEY_RELEASE) |
key_released(x ^ KEY_RELEASE); |
else |
active_read_key_pressed(x); |
} |
return ch; |
} |
|
/** @} |
*/ |