WebSVN – HelenOS – Diff – /branches/network/kernel/genarch/src/drivers/i8042/i8042.c


/*
 * 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 <genarch/drivers/legacy/ia32/io.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>
 
i8042_instance_t lgcy_i8042_instance = {
    .i8042 = (i8042_t *) i8042_BASE,
};
 
/* 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)
{
    i8042_instance_t *i8042_instance = instance;
    i8042_t *dev = i8042_instance->i8042;
    if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
        return IRQ_ACCEPT;
    else
        return IRQ_DECLINE;
}
 
static void i8042_irq_handler(irq_t *irq)
{
    if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) {
        /*
         * This will hopefully go to the IRQ dispatcher code soon.
         */
        ipc_irq_send_notif(irq);
        return;
    }
 
    i8042_instance_t *instance = irq->instance;
    i8042_t *dev = instance->i8042;
 
    uint8_t data;
    uint8_t status;
       
    if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {
        data = pio_read_8(&dev->data);
           
        if ((status & i8042_MOUSE_DATA))
            return;
 
        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)
{
    i8042_t *dev = lgcy_i8042_instance.i8042;
 
    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;
    i8042_kbd_irq.instance = &lgcy_i8042_instance;
    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;
    i8042_mouse_irq.instance = &lgcy_i8042_instance;
    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(&dev->status) & i8042_BUFFER_FULL_MASK) &&
        i < 100; i++) {
        (void) pio_read_8(&dev->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)
{
    i8042_t *dev = lgcy_i8042_instance.i8042;
    char ch;
   
    while (!(ch = active_read_buff_read())) {
        uint8_t x;
       
        while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK))
            ;
       
        x = pio_read_8(&dev->data);
        if (x & KEY_RELEASE)
            key_released(x ^ KEY_RELEASE);
        else
            active_read_key_pressed(x);
    }
    return ch;
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/network/kernel/genarch/src/drivers/i8042/i8042.c @ 4579 – Rev 3931 → 3932

Rev 3931		Rev 3932
1	/*	1	/*
2	* Copyright (c) 2001-2004 Jakub Jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genarch	29	/** @addtogroup genarch
30	* @{	30	* @{
31	*/	31	*/
32	/**	32	/**
33	* @file	33	* @file
34	* @brief i8042 processor driver.	34	* @brief i8042 processor driver.
35	*	35	*
36	* It takes care of low-level keyboard functions.	36	* It takes care of low-level keyboard functions.
37	*/	37	*/
38		38
39	#include <genarch/kbd/i8042.h>	39	#include <genarch/kbd/i8042.h>
40	#include <arch/drivers/kbd.h>	40	#include <arch/drivers/kbd.h>
41	#include <genarch/kbd/key.h>	41	#include <genarch/kbd/key.h>
42	#include <genarch/kbd/scanc.h>	42	#include <genarch/kbd/scanc.h>
43	#include <genarch/kbd/scanc_pc.h>	43	#include <genarch/kbd/scanc_pc.h>
-		44	#include <genarch/drivers/legacy/ia32/io.h>
44	#include <cpu.h>	45	#include <cpu.h>
45	#include <arch/asm.h>	46	#include <arch/asm.h>
46	#include <arch.h>	47	#include <arch.h>
47	#include <console/chardev.h>	48	#include <console/chardev.h>
48	#include <console/console.h>	49	#include <console/console.h>
49	#include <interrupt.h>	50	#include <interrupt.h>
50	#include <sysinfo/sysinfo.h>	51	#include <sysinfo/sysinfo.h>
51	#include <ipc/irq.h>	52	#include <ipc/irq.h>
52		53
53	i8042_instance_t lgcy_i8042_instance = {	54	i8042_instance_t lgcy_i8042_instance = {
54	.i8042 = (i8042_t *) 0x60,	55	.i8042 = (i8042_t *) i8042_BASE,
55	};	56	};
56		57
57	/* Keyboard commands. */	58	/* Keyboard commands. */
58	#define KBD_ENABLE 0xf4	59	#define KBD_ENABLE 0xf4
59	#define KBD_DISABLE 0xf5	60	#define KBD_DISABLE 0xf5
60	#define KBD_ACK 0xfa	61	#define KBD_ACK 0xfa
61		62
62	/*	63	/*
63	* 60 Write 8042 Command Byte: next data byte written to port 60h is	64	* 60 Write 8042 Command Byte: next data byte written to port 60h is
64	* placed in 8042 command register. Format:	65	* placed in 8042 command register. Format:
65	*	66	*
66	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	67	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
67	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	68	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
68	* \| \| \| \| \| \| `----- should be 0	69	* \| \| \| \| \| \| `----- should be 0
69	* \| \| \| \| \| `------ 1=set status register system, 0=clear	70	* \| \| \| \| \| `------ 1=set status register system, 0=clear
70	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	71	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
71	* \| \| \| `-------- disable keyboard I/O by driving clock line low	72	* \| \| \| `-------- disable keyboard I/O by driving clock line low
72	* \| \| `--------- disable auxiliary device, drives clock line low	73	* \| \| `--------- disable auxiliary device, drives clock line low
73	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	74	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
74	* `----------- reserved, should be 0	75	* `----------- reserved, should be 0
75	*/	76	*/
76		77
77	#define i8042_SET_COMMAND 0x60	78	#define i8042_SET_COMMAND 0x60
78	#define i8042_COMMAND 0x69	79	#define i8042_COMMAND 0x69
79		80
80	#define i8042_BUFFER_FULL_MASK 0x01	81	#define i8042_BUFFER_FULL_MASK 0x01
81	#define i8042_WAIT_MASK 0x02	82	#define i8042_WAIT_MASK 0x02
82	#define i8042_MOUSE_DATA 0x20	83	#define i8042_MOUSE_DATA 0x20
83		84
84	static void i8042_suspend(chardev_t *);	85	static void i8042_suspend(chardev_t *);
85	static void i8042_resume(chardev_t *);	86	static void i8042_resume(chardev_t *);
86		87
87	static chardev_operations_t ops = {	88	static chardev_operations_t ops = {
88	.suspend = i8042_suspend,	89	.suspend = i8042_suspend,
89	.resume = i8042_resume,	90	.resume = i8042_resume,
90	.read = i8042_key_read	91	.read = i8042_key_read
91	};	92	};
92		93
93	/** Structure for i8042's IRQ. */	94	/** Structure for i8042's IRQ. */
94	static irq_t i8042_kbd_irq;	95	static irq_t i8042_kbd_irq;
95	static irq_t i8042_mouse_irq;	96	static irq_t i8042_mouse_irq;
96		97
97	void i8042_grab(void)	98	void i8042_grab(void)
98	{	99	{
99	ipl_t ipl = interrupts_disable();	100	ipl_t ipl = interrupts_disable();
100		101
101	spinlock_lock(&i8042_kbd_irq.lock);	102	spinlock_lock(&i8042_kbd_irq.lock);
102	i8042_kbd_irq.notif_cfg.notify = false;	103	i8042_kbd_irq.notif_cfg.notify = false;
103	spinlock_unlock(&i8042_kbd_irq.lock);	104	spinlock_unlock(&i8042_kbd_irq.lock);
104		105
105	spinlock_lock(&i8042_mouse_irq.lock);	106	spinlock_lock(&i8042_mouse_irq.lock);
106	i8042_mouse_irq.notif_cfg.notify = false;	107	i8042_mouse_irq.notif_cfg.notify = false;
107	spinlock_unlock(&i8042_mouse_irq.lock);	108	spinlock_unlock(&i8042_mouse_irq.lock);
108		109
109	interrupts_restore(ipl);	110	interrupts_restore(ipl);
110	}	111	}
111		112
112	void i8042_release(void)	113	void i8042_release(void)
113	{	114	{
114	ipl_t ipl = interrupts_disable();	115	ipl_t ipl = interrupts_disable();
115		116
116	spinlock_lock(&i8042_kbd_irq.lock);	117	spinlock_lock(&i8042_kbd_irq.lock);
117	if (i8042_kbd_irq.notif_cfg.answerbox)	118	if (i8042_kbd_irq.notif_cfg.answerbox)
118	i8042_kbd_irq.notif_cfg.notify = true;	119	i8042_kbd_irq.notif_cfg.notify = true;
119	spinlock_unlock(&i8042_kbd_irq.lock);	120	spinlock_unlock(&i8042_kbd_irq.lock);
120		121
121	spinlock_lock(&i8042_mouse_irq.lock);	122	spinlock_lock(&i8042_mouse_irq.lock);
122	if (i8042_mouse_irq.notif_cfg.answerbox)	123	if (i8042_mouse_irq.notif_cfg.answerbox)
123	i8042_mouse_irq.notif_cfg.notify = true;	124	i8042_mouse_irq.notif_cfg.notify = true;
124	spinlock_unlock(&i8042_mouse_irq.lock);	125	spinlock_unlock(&i8042_mouse_irq.lock);
125		126
126	interrupts_restore(ipl);	127	interrupts_restore(ipl);
127	}	128	}
128		129
129	static irq_ownership_t i8042_claim(void *instance)	130	static irq_ownership_t i8042_claim(void *instance)
130	{	131	{
131	i8042_instance_t *i8042_instance = instance;	132	i8042_instance_t *i8042_instance = instance;
132	i8042_t *dev = i8042_instance->i8042;	133	i8042_t *dev = i8042_instance->i8042;
133	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)	134	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
134	return IRQ_ACCEPT;	135	return IRQ_ACCEPT;
135	else	136	else
136	return IRQ_DECLINE;	137	return IRQ_DECLINE;
137	}	138	}
138		139
139	static void i8042_irq_handler(irq_t *irq)	140	static void i8042_irq_handler(irq_t *irq)
140	{	141	{
141	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) {	142	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) {
142	/*	143	/*
143	* This will hopefully go to the IRQ dispatcher code soon.	144	* This will hopefully go to the IRQ dispatcher code soon.
144	*/	145	*/
145	ipc_irq_send_notif(irq);	146	ipc_irq_send_notif(irq);
146	return;	147	return;
147	}	148	}
148		149
149	i8042_instance_t *instance = irq->instance;	150	i8042_instance_t *instance = irq->instance;
150	i8042_t *dev = instance->i8042;	151	i8042_t *dev = instance->i8042;
151		152
152	uint8_t data;	153	uint8_t data;
153	uint8_t status;	154	uint8_t status;
154		155
155	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {	156	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {
156	data = pio_read_8(&dev->data);	157	data = pio_read_8(&dev->data);
157		158
158	if ((status & i8042_MOUSE_DATA))	159	if ((status & i8042_MOUSE_DATA))
159	return;	160	return;
160		161
161	if (data & KEY_RELEASE)	162	if (data & KEY_RELEASE)
162	key_released(data ^ KEY_RELEASE);	163	key_released(data ^ KEY_RELEASE);
163	else	164	else
164	key_pressed(data);	165	key_pressed(data);
165	}	166	}
166	}	167	}
167		168
168	/** Initialize i8042. */	169	/** Initialize i8042. */
169	void	170	void
170	i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno,	171	i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno,
171	inr_t mouse_inr)	172	inr_t mouse_inr)
172	{	173	{
173	i8042_t *dev = lgcy_i8042_instance.i8042;	174	i8042_t *dev = lgcy_i8042_instance.i8042;
174		175
175	chardev_initialize("i8042_kbd", &kbrd, &ops);	176	chardev_initialize("i8042_kbd", &kbrd, &ops);
176	stdin = &kbrd;	177	stdin = &kbrd;
177		178
178	irq_initialize(&i8042_kbd_irq);	179	irq_initialize(&i8042_kbd_irq);
179	i8042_kbd_irq.devno = kbd_devno;	180	i8042_kbd_irq.devno = kbd_devno;
180	i8042_kbd_irq.inr = kbd_inr;	181	i8042_kbd_irq.inr = kbd_inr;
181	i8042_kbd_irq.claim = i8042_claim;	182	i8042_kbd_irq.claim = i8042_claim;
182	i8042_kbd_irq.handler = i8042_irq_handler;	183	i8042_kbd_irq.handler = i8042_irq_handler;
183	i8042_kbd_irq.instance = &lgcy_i8042_instance;	184	i8042_kbd_irq.instance = &lgcy_i8042_instance;
184	irq_register(&i8042_kbd_irq);	185	irq_register(&i8042_kbd_irq);
185		186
186	irq_initialize(&i8042_mouse_irq);	187	irq_initialize(&i8042_mouse_irq);
187	i8042_mouse_irq.devno = mouse_devno;	188	i8042_mouse_irq.devno = mouse_devno;
188	i8042_mouse_irq.inr = mouse_inr;	189	i8042_mouse_irq.inr = mouse_inr;
189	i8042_mouse_irq.claim = i8042_claim;	190	i8042_mouse_irq.claim = i8042_claim;
190	i8042_mouse_irq.handler = i8042_irq_handler;	191	i8042_mouse_irq.handler = i8042_irq_handler;
191	i8042_mouse_irq.instance = &lgcy_i8042_instance;	192	i8042_mouse_irq.instance = &lgcy_i8042_instance;
192	irq_register(&i8042_mouse_irq);	193	irq_register(&i8042_mouse_irq);
193		194
194	trap_virtual_enable_irqs(1 << kbd_inr);	195	trap_virtual_enable_irqs(1 << kbd_inr);
195	trap_virtual_enable_irqs(1 << mouse_inr);	196	trap_virtual_enable_irqs(1 << mouse_inr);
196		197
197	/*	198	/*
198	* Clear input buffer.	199	* Clear input buffer.
199	* Number of iterations is limited to prevent infinite looping.	200	* Number of iterations is limited to prevent infinite looping.
200	*/	201	*/
201	int i;	202	int i;
202	for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) &&	203	for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) &&
203	i < 100; i++) {	204	i < 100; i++) {
204	(void) pio_read_8(&dev->data);	205	(void) pio_read_8(&dev->data);
205	}	206	}
206		207
207	sysinfo_set_item_val("kbd", NULL, true);	208	sysinfo_set_item_val("kbd", NULL, true);
208	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);	209	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
209	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);	210	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
210	#ifdef KBD_LEGACY	211	#ifdef KBD_LEGACY
211	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);	212	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);
212	#endif	213	#endif
213	sysinfo_set_item_val("mouse", NULL, true);	214	sysinfo_set_item_val("mouse", NULL, true);
214	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);	215	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
215	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);	216	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
216		217
217	i8042_grab();	218	i8042_grab();
218	}	219	}
219		220
220	/* Called from getc(). */	221	/* Called from getc(). */
221	void i8042_resume(chardev_t *d)	222	void i8042_resume(chardev_t *d)
222	{	223	{
223	}	224	}
224		225
225	/* Called from getc(). */	226	/* Called from getc(). */
226	void i8042_suspend(chardev_t *d)	227	void i8042_suspend(chardev_t *d)
227	{	228	{
228	}	229	}
229		230
230	char i8042_key_read(chardev_t *d)	231	char i8042_key_read(chardev_t *d)
231	{	232	{
232	i8042_t *dev = lgcy_i8042_instance.i8042;	233	i8042_t *dev = lgcy_i8042_instance.i8042;
233	char ch;	234	char ch;
234		235
235	while (!(ch = active_read_buff_read())) {	236	while (!(ch = active_read_buff_read())) {
236	uint8_t x;	237	uint8_t x;
237		238
238	while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK))	239	while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK))
239	;	240	;
240		241
241	x = pio_read_8(&dev->data);	242	x = pio_read_8(&dev->data);
242	if (x & KEY_RELEASE)	243	if (x & KEY_RELEASE)
243	key_released(x ^ KEY_RELEASE);	244	key_released(x ^ KEY_RELEASE);
244	else	245	else
245	active_read_key_pressed(x);	246	active_read_key_pressed(x);
246	}	247	}
247	return ch;	248	return ch;
248	}	249	}
249		250
250	/** @}	251	/** @}
251	*/	252	*/
252		253