WebSVN – HelenOS – Diff – /branches/dynload/kernel/genarch/src/kbd/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 <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);
    }
}
 
/** @}
 */
 

Rev 2516	Rev 2927
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 <genarch/kbd/key.h>	40	#include <genarch/kbd/key.h>
41	#include <genarch/kbd/scanc.h>	41	#include <genarch/kbd/scanc.h>
42	#include <genarch/kbd/scanc_pc.h>	42	#include <genarch/kbd/scanc_pc.h>
43	#include <arch/drivers/i8042.h>	43	#include <arch/drivers/i8042.h>
44	#include <cpu.h>	44	#include <cpu.h>
45	#include <arch/asm.h>	45	#include <arch/asm.h>
46	#include <arch.h>	46	#include <arch.h>
47	#include <console/chardev.h>	47	#include <console/chardev.h>
48	#include <console/console.h>	48	#include <console/console.h>
49	#include <interrupt.h>	49	#include <interrupt.h>
50	#include <sysinfo/sysinfo.h>	50	#include <sysinfo/sysinfo.h>
51	#include <ipc/irq.h>	51	#include <ipc/irq.h>
52		52
53	/* Keyboard commands. */	53	/* Keyboard commands. */
54	#define KBD_ENABLE 0xf4	54	#define KBD_ENABLE 0xf4
55	#define KBD_DISABLE 0xf5	55	#define KBD_DISABLE 0xf5
56	#define KBD_ACK 0xfa	56	#define KBD_ACK 0xfa
57		57
58	/*	58	/*
59	* 60 Write 8042 Command Byte: next data byte written to port 60h is	59	* 60 Write 8042 Command Byte: next data byte written to port 60h is
60	* placed in 8042 command register. Format:	60	* placed in 8042 command register. Format:
61	*	61	*
62	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	62	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
63	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	63	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
64	* \| \| \| \| \| \| `----- should be 0	64	* \| \| \| \| \| \| `----- should be 0
65	* \| \| \| \| \| `------ 1=set status register system, 0=clear	65	* \| \| \| \| \| `------ 1=set status register system, 0=clear
66	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	66	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
67	* \| \| \| `-------- disable keyboard I/O by driving clock line low	67	* \| \| \| `-------- disable keyboard I/O by driving clock line low
68	* \| \| `--------- disable auxiliary device, drives clock line low	68	* \| \| `--------- disable auxiliary device, drives clock line low
69	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	69	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
70	* `----------- reserved, should be 0	70	* `----------- reserved, should be 0
71	*/	71	*/
72		72
73	#define i8042_SET_COMMAND 0x60	73	#define i8042_SET_COMMAND 0x60
74	#define i8042_COMMAND 0x69	74	#define i8042_COMMAND 0x69
75		75
76	#define i8042_BUFFER_FULL_MASK 0x01	76	#define i8042_BUFFER_FULL_MASK 0x01
77	#define i8042_WAIT_MASK 0x02	77	#define i8042_WAIT_MASK 0x02
78	#define i8042_MOUSE_DATA 0x20	78	#define i8042_MOUSE_DATA 0x20
79		79
80	static void i8042_suspend(chardev_t *);	80	static void i8042_suspend(chardev_t *);
81	static void i8042_resume(chardev_t *);	81	static void i8042_resume(chardev_t *);
82		82
83	static chardev_operations_t ops = {	83	static chardev_operations_t ops = {
84	.suspend = i8042_suspend,	84	.suspend = i8042_suspend,
85	.resume = i8042_resume,	85	.resume = i8042_resume,
86	.read = i8042_key_read	86	.read = i8042_key_read
87	};	87	};
88		88
89	/** Structure for i8042's IRQ. */	89	/** Structure for i8042's IRQ. */
90	static irq_t i8042_kbd_irq;	90	static irq_t i8042_kbd_irq;
91	static irq_t i8042_mouse_irq;	91	static irq_t i8042_mouse_irq;
92		92
93	void i8042_grab(void)	93	void i8042_grab(void)
94	{	94	{
95	ipl_t ipl = interrupts_disable();	95	ipl_t ipl = interrupts_disable();
96		96
97	spinlock_lock(&i8042_kbd_irq.lock);	97	spinlock_lock(&i8042_kbd_irq.lock);
98	i8042_kbd_irq.notif_cfg.notify = false;	98	i8042_kbd_irq.notif_cfg.notify = false;
99	spinlock_unlock(&i8042_kbd_irq.lock);	99	spinlock_unlock(&i8042_kbd_irq.lock);
100		100
101	spinlock_lock(&i8042_mouse_irq.lock);	101	spinlock_lock(&i8042_mouse_irq.lock);
102	i8042_mouse_irq.notif_cfg.notify = false;	102	i8042_mouse_irq.notif_cfg.notify = false;
103	spinlock_unlock(&i8042_mouse_irq.lock);	103	spinlock_unlock(&i8042_mouse_irq.lock);
104		104
105	interrupts_restore(ipl);	105	interrupts_restore(ipl);
106	}	106	}
107		107
108	void i8042_release(void)	108	void i8042_release(void)
109	{	109	{
110	ipl_t ipl = interrupts_disable();	110	ipl_t ipl = interrupts_disable();
111		111
112	spinlock_lock(&i8042_kbd_irq.lock);	112	spinlock_lock(&i8042_kbd_irq.lock);
113	if (i8042_kbd_irq.notif_cfg.answerbox)	113	if (i8042_kbd_irq.notif_cfg.answerbox)
114	i8042_kbd_irq.notif_cfg.notify = true;	114	i8042_kbd_irq.notif_cfg.notify = true;
115	spinlock_unlock(&i8042_kbd_irq.lock);	115	spinlock_unlock(&i8042_kbd_irq.lock);
116		116
117	spinlock_lock(&i8042_mouse_irq.lock);	117	spinlock_lock(&i8042_mouse_irq.lock);
118	if (i8042_mouse_irq.notif_cfg.answerbox)	118	if (i8042_mouse_irq.notif_cfg.answerbox)
119	i8042_mouse_irq.notif_cfg.notify = true;	119	i8042_mouse_irq.notif_cfg.notify = true;
120	spinlock_unlock(&i8042_mouse_irq.lock);	120	spinlock_unlock(&i8042_mouse_irq.lock);
121		121
122	interrupts_restore(ipl);	122	interrupts_restore(ipl);
123	}	123	}
124		124
125	static irq_ownership_t i8042_claim(void)	125	static irq_ownership_t i8042_claim(void)
126	{	126	{
127	return IRQ_ACCEPT;	127	return IRQ_ACCEPT;
128	}	128	}
129		129
130	static void i8042_irq_handler(irq_t irq, void arg, ...)	130	static void i8042_irq_handler(irq_t irq, void arg, ...)
131	{	131	{
132	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)	132	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
133	ipc_irq_send_notif(irq);	133	ipc_irq_send_notif(irq);
134	else {	134	else {
135	uint8_t data;	135	uint8_t data;
136	uint8_t status;	136	uint8_t status;
137		137
138	while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {	138	while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
139	data = i8042_data_read();	139	data = i8042_data_read();
140		140
141	if ((status & i8042_MOUSE_DATA))	141	if ((status & i8042_MOUSE_DATA))
142	continue;	142	continue;
143		143
144	if (data & KEY_RELEASE)	144	if (data & KEY_RELEASE)
145	key_released(data ^ KEY_RELEASE);	145	key_released(data ^ KEY_RELEASE);
146	else	146	else
147	key_pressed(data);	147	key_pressed(data);
148	}	148	}
149	}	149	}
150	}	150	}
151		151
152	/** Initialize i8042. */	152	/** Initialize i8042. */
153	void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)	153	void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)
154	{	154	{
155	chardev_initialize("i8042_kbd", &kbrd, &ops);	155	chardev_initialize("i8042_kbd", &kbrd, &ops);
156	stdin = &kbrd;	156	stdin = &kbrd;
157		157
158	irq_initialize(&i8042_kbd_irq);	158	irq_initialize(&i8042_kbd_irq);
159	i8042_kbd_irq.devno = kbd_devno;	159	i8042_kbd_irq.devno = kbd_devno;
160	i8042_kbd_irq.inr = kbd_inr;	160	i8042_kbd_irq.inr = kbd_inr;
161	i8042_kbd_irq.claim = i8042_claim;	161	i8042_kbd_irq.claim = i8042_claim;
162	i8042_kbd_irq.handler = i8042_irq_handler;	162	i8042_kbd_irq.handler = i8042_irq_handler;
163	irq_register(&i8042_kbd_irq);	163	irq_register(&i8042_kbd_irq);
164		164
165	irq_initialize(&i8042_mouse_irq);	165	irq_initialize(&i8042_mouse_irq);
166	i8042_mouse_irq.devno = mouse_devno;	166	i8042_mouse_irq.devno = mouse_devno;
167	i8042_mouse_irq.inr = mouse_inr;	167	i8042_mouse_irq.inr = mouse_inr;
168	i8042_mouse_irq.claim = i8042_claim;	168	i8042_mouse_irq.claim = i8042_claim;
169	i8042_mouse_irq.handler = i8042_irq_handler;	169	i8042_mouse_irq.handler = i8042_irq_handler;
170	irq_register(&i8042_mouse_irq);	170	irq_register(&i8042_mouse_irq);
171	#ifndef ia64	171	#ifndef ia64
172	trap_virtual_enable_irqs(1 << kbd_inr);	172	trap_virtual_enable_irqs(1 << kbd_inr);
173	trap_virtual_enable_irqs(1 << mouse_inr);	173	trap_virtual_enable_irqs(1 << mouse_inr);
174	#endif	174	#endif
175	/*	175	/*
176	* Clear input buffer.	176	* Clear input buffer.
177	* Number of iterations is limited to prevent infinite looping.	177	* Number of iterations is limited to prevent infinite looping.
178	*/	178	*/
179	int i;	179	int i;
180	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {	180	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
181	i8042_data_read();	181	i8042_data_read();
182	}	182	}
183		183
184	sysinfo_set_item_val("kbd", NULL, true);	184	sysinfo_set_item_val("kbd", NULL, true);
185	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);	185	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
186	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);	186	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
187		187
188	sysinfo_set_item_val("mouse", NULL, true);	188	sysinfo_set_item_val("mouse", NULL, true);
189	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);	189	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
190	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);	190	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
191		191
192	i8042_grab();	192	i8042_grab();
193	}	193	}
194		194
195	/* Called from getc(). */	195	/* Called from getc(). */
196	void i8042_resume(chardev_t *d)	196	void i8042_resume(chardev_t *d)
197	{	197	{
198	}	198	}
199		199
200	/* Called from getc(). */	200	/* Called from getc(). */
201	void i8042_suspend(chardev_t *d)	201	void i8042_suspend(chardev_t *d)
202	{	202	{
203	}	203	}
204		204
205	char i8042_key_read(chardev_t *d)	205	char i8042_key_read(chardev_t *d)
206	{	206	{
207	char ch;	207	char ch;
208		208
209	while(!(ch = active_read_buff_read())) {	209	while(!(ch = active_read_buff_read())) {
210	uint8_t x;	210	uint8_t x;
211	while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))	211	while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
212	;	212	;
213	x = i8042_data_read();	213	x = i8042_data_read();
214	if (x & KEY_RELEASE)	214	if (x & KEY_RELEASE)
215	key_released(x ^ KEY_RELEASE);	215	key_released(x ^ KEY_RELEASE);
216	else	216	else
217	active_read_key_pressed(x);	217	active_read_key_pressed(x);
218	}	218	}
219	return ch;	219	return ch;
220	}	220	}
221		221
222	/** Poll for key press and release events.	222	/** Poll for key press and release events.
223	*	223	*
224	* This function can be used to implement keyboard polling.	224	* This function can be used to implement keyboard polling.
225	*/	225	*/
226	void i8042_poll(void)	226	void i8042_poll(void)
227	{	227	{
228	uint8_t x;	228	uint8_t x;
229		229
230	while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {	230	while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
231	x = i8042_data_read();	231	x = i8042_data_read();
232	if (x & KEY_RELEASE)	232	if (x & KEY_RELEASE)
233	key_released(x ^ KEY_RELEASE);	233	key_released(x ^ KEY_RELEASE);
234	else	234	else
235	key_pressed(x);	235	key_pressed(x);
236	}	236	}
237	}	237	}
238		238
239	/** @}	239	/** @}
240	*/	240	*/
241		241

Subversion Repositories HelenOS

(root)/branches/dynload/kernel/genarch/src/kbd/i8042.c @ 3674 – Rev 2516 → 2927