| 0,0 → 1,240 |
|---|
| /* |
| * 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 <genarch/kbd/key.h> |
| #include <genarch/kbd/scanc.h> |
| #include <genarch/kbd/scanc_pc.h> |
| #include <arch/drivers/i8042.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> |
| |
| /* 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) |
| { |
| return IRQ_ACCEPT; |
| } |
| |
| static void i8042_irq_handler(irq_t *irq, void *arg, ...) |
| { |
| if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) |
| ipc_irq_send_notif(irq); |
| else { |
| uint8_t data; |
| uint8_t status; |
| |
| while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
| data = i8042_data_read(); |
| |
| 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); |
| #ifndef ia64 |
| trap_virtual_enable_irqs(1 << kbd_inr); |
| trap_virtual_enable_irqs(1 << mouse_inr); |
| #endif |
| /* |
| * Clear input buffer. |
| * Number of iterations is limited to prevent infinite looping. |
| */ |
| int i; |
| for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
| i8042_data_read(); |
| } |
| |
| 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); |
| |
| 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 (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
| ; |
| x = i8042_data_read(); |
| if (x & KEY_RELEASE) |
| key_released(x ^ KEY_RELEASE); |
| else |
| active_read_key_pressed(x); |
| } |
| return ch; |
| } |
| |
| /** Poll for key press and release events. |
| * |
| * This function can be used to implement keyboard polling. |
| */ |
| void i8042_poll(void) |
| { |
| uint8_t x; |
| |
| while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
| x = i8042_data_read(); |
| if (x & KEY_RELEASE) |
| key_released(x ^ KEY_RELEASE); |
| else |
| key_pressed(x); |
| } |
| } |
| |
| /** @} |
| */ |