WebSVN – HelenOS – Diff – /branches/rcu/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>
#include <synch/rcu.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;
 
/** Wait until the controller reads its data. */
static void i8042_wait(void) {
    while (i8042_status_read() & i8042_WAIT_MASK) {
        /* wait */
    }
}
 
void i8042_grab(void)
{
    ipl_t ipl = interrupts_disable();
   
    i8042_wait();
    i8042_command_write(i8042_SET_COMMAND);
    i8042_wait();
    i8042_data_write(i8042_COMMAND);
    i8042_wait();
 
    //rcu_read_lock() is not needed, ints are disabled
    //rcu: atomic update doesn't need reallocation
    rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = false;
   
    rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = false;
   
    interrupts_restore(ipl);
}
 
void i8042_release(void)
{
    ipl_t ipl = interrupts_disable();
    //rcu: atomic update doesn't need reallocation
    spinlock_lock(&i8042_kbd_irq.lock);
    if (rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).answerbox)
        rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = true;
    spinlock_unlock(&i8042_kbd_irq.lock);
   
    spinlock_lock(&i8042_mouse_irq.lock);
    if (rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).answerbox)
        rcu_dereference_pointer(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_kbd_irq_handler(irq_t *irq, void *arg, ...)
{
    if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)
        ipc_irq_send_notif(irq);
    else {
        uint8_t x;
        uint8_t status;
       
        while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
            x = i8042_data_read();
           
            if ((status & i8042_MOUSE_DATA))
                continue;
           
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
    }
}
 
static void i8042_mouse_irq_handler(irq_t *irq, void *arg, ...)
{
    if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)
        ipc_irq_send_notif(irq);
}
 
/** 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_kbd_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_mouse_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; (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 2456	Rev 2463
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	#include <generic/synch/rcu.h>	52	#include <synch/rcu.h>
53		53
54	/* Keyboard commands. */	54	/* Keyboard commands. */
55	#define KBD_ENABLE 0xf4	55	#define KBD_ENABLE 0xf4
56	#define KBD_DISABLE 0xf5	56	#define KBD_DISABLE 0xf5
57	#define KBD_ACK 0xfa	57	#define KBD_ACK 0xfa
58		58
59	/*	59	/*
60	* 60 Write 8042 Command Byte: next data byte written to port 60h is	60	* 60 Write 8042 Command Byte: next data byte written to port 60h is
61	* placed in 8042 command register. Format:	61	* placed in 8042 command register. Format:
62	*	62	*
63	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	63	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
64	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	64	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
65	* \| \| \| \| \| \| `----- should be 0	65	* \| \| \| \| \| \| `----- should be 0
66	* \| \| \| \| \| `------ 1=set status register system, 0=clear	66	* \| \| \| \| \| `------ 1=set status register system, 0=clear
67	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	67	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
68	* \| \| \| `-------- disable keyboard I/O by driving clock line low	68	* \| \| \| `-------- disable keyboard I/O by driving clock line low
69	* \| \| `--------- disable auxiliary device, drives clock line low	69	* \| \| `--------- disable auxiliary device, drives clock line low
70	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	70	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
71	* `----------- reserved, should be 0	71	* `----------- reserved, should be 0
72	*/	72	*/
73		73
74	#define i8042_SET_COMMAND 0x60	74	#define i8042_SET_COMMAND 0x60
75	#define i8042_COMMAND 0x69	75	#define i8042_COMMAND 0x69
76		76
77	#define i8042_BUFFER_FULL_MASK 0x01	77	#define i8042_BUFFER_FULL_MASK 0x01
78	#define i8042_WAIT_MASK 0x02	78	#define i8042_WAIT_MASK 0x02
79	#define i8042_MOUSE_DATA 0x20	79	#define i8042_MOUSE_DATA 0x20
80		80
81	static void i8042_suspend(chardev_t *);	81	static void i8042_suspend(chardev_t *);
82	static void i8042_resume(chardev_t *);	82	static void i8042_resume(chardev_t *);
83		83
84	static chardev_operations_t ops = {	84	static chardev_operations_t ops = {
85	.suspend = i8042_suspend,	85	.suspend = i8042_suspend,
86	.resume = i8042_resume,	86	.resume = i8042_resume,
87	.read = i8042_key_read	87	.read = i8042_key_read
88	};	88	};
89		89
90	/** Structure for i8042's IRQ. */	90	/** Structure for i8042's IRQ. */
91	static irq_t i8042_kbd_irq;	91	static irq_t i8042_kbd_irq;
92	static irq_t i8042_mouse_irq;	92	static irq_t i8042_mouse_irq;
93		93
94	/** Wait until the controller reads its data. */	94	/** Wait until the controller reads its data. */
95	static void i8042_wait(void) {	95	static void i8042_wait(void) {
96	while (i8042_status_read() & i8042_WAIT_MASK) {	96	while (i8042_status_read() & i8042_WAIT_MASK) {
97	/* wait */	97	/* wait */
98	}	98	}
99	}	99	}
100		100
101	void i8042_grab(void)	101	void i8042_grab(void)
102	{	102	{
103	ipl_t ipl = interrupts_disable();	103	ipl_t ipl = interrupts_disable();
104		104
105	i8042_wait();	105	i8042_wait();
106	i8042_command_write(i8042_SET_COMMAND);	106	i8042_command_write(i8042_SET_COMMAND);
107	i8042_wait();	107	i8042_wait();
108	i8042_data_write(i8042_COMMAND);	108	i8042_data_write(i8042_COMMAND);
109	i8042_wait();	109	i8042_wait();
110		110
111	//rcu_read_lock() is not needed, ints are disabled	111	//rcu_read_lock() is not needed, ints are disabled
112	//rcu: atomic update doesn't need reallocation	112	//rcu: atomic update doesn't need reallocation
113	rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = false;	113	rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = false;
114		114
115	rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = false;	115	rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = false;
116		116
117	interrupts_restore(ipl);	117	interrupts_restore(ipl);
118	}	118	}
119		119
120	void i8042_release(void)	120	void i8042_release(void)
121	{	121	{
122	ipl_t ipl = interrupts_disable();	122	ipl_t ipl = interrupts_disable();
123	//rcu: atomic update doesn't need reallocation	123	//rcu: atomic update doesn't need reallocation
124	spinlock_lock(&i8042_kbd_irq.lock);	124	spinlock_lock(&i8042_kbd_irq.lock);
125	if (rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).answerbox)	125	if (rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).answerbox)
126	rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = true;	126	rcu_dereference_pointer(i8042_kbd_irq.notif_cfg).notify = true;
127	spinlock_unlock(&i8042_kbd_irq.lock);	127	spinlock_unlock(&i8042_kbd_irq.lock);
128		128
129	spinlock_lock(&i8042_mouse_irq.lock);	129	spinlock_lock(&i8042_mouse_irq.lock);
130	if (rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).answerbox)	130	if (rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).answerbox)
131	rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = true;	131	rcu_dereference_pointer(i8042_mouse_irq.notif_cfg).notify = true;
132	spinlock_unlock(&i8042_mouse_irq.lock);	132	spinlock_unlock(&i8042_mouse_irq.lock);
133		133
134	interrupts_restore(ipl);	134	interrupts_restore(ipl);
135	}	135	}
136		136
137	static irq_ownership_t i8042_claim(void)	137	static irq_ownership_t i8042_claim(void)
138	{	138	{
139	return IRQ_ACCEPT;	139	return IRQ_ACCEPT;
140	}	140	}
141		141
142	static void i8042_kbd_irq_handler(irq_t irq, void arg, ...)	142	static void i8042_kbd_irq_handler(irq_t irq, void arg, ...)
143	{	143	{
144	if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)	144	if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)
145	ipc_irq_send_notif(irq);	145	ipc_irq_send_notif(irq);
146	else {	146	else {
147	uint8_t x;	147	uint8_t x;
148	uint8_t status;	148	uint8_t status;
149		149
150	while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {	150	while (((status = i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
151	x = i8042_data_read();	151	x = i8042_data_read();
152		152
153	if ((status & i8042_MOUSE_DATA))	153	if ((status & i8042_MOUSE_DATA))
154	continue;	154	continue;
155		155
156	if (x & KEY_RELEASE)	156	if (x & KEY_RELEASE)
157	key_released(x ^ KEY_RELEASE);	157	key_released(x ^ KEY_RELEASE);
158	else	158	else
159	key_pressed(x);	159	key_pressed(x);
160	}	160	}
161	}	161	}
162	}	162	}
163		163
164	static void i8042_mouse_irq_handler(irq_t irq, void arg, ...)	164	static void i8042_mouse_irq_handler(irq_t irq, void arg, ...)
165	{	165	{
166	if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)	166	if (rcu_dereference_pointer(irq->notif_cfg).notify && rcu_dereference_pointer(irq->notif_cfg).answerbox)
167	ipc_irq_send_notif(irq);	167	ipc_irq_send_notif(irq);
168	}	168	}
169		169
170	/** Initialize i8042. */	170	/** Initialize i8042. */
171	void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)	171	void i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno, inr_t mouse_inr)
172	{	172	{
173	chardev_initialize("i8042_kbd", &kbrd, &ops);	173	chardev_initialize("i8042_kbd", &kbrd, &ops);
174	stdin = &kbrd;	174	stdin = &kbrd;
175		175
176	irq_initialize(&i8042_kbd_irq);	176	irq_initialize(&i8042_kbd_irq);
177	i8042_kbd_irq.devno = kbd_devno;	177	i8042_kbd_irq.devno = kbd_devno;
178	i8042_kbd_irq.inr = kbd_inr;	178	i8042_kbd_irq.inr = kbd_inr;
179	i8042_kbd_irq.claim = i8042_claim;	179	i8042_kbd_irq.claim = i8042_claim;
180	i8042_kbd_irq.handler = i8042_kbd_irq_handler;	180	i8042_kbd_irq.handler = i8042_kbd_irq_handler;
181	irq_register(&i8042_kbd_irq);	181	irq_register(&i8042_kbd_irq);
182		182
183	irq_initialize(&i8042_mouse_irq);	183	irq_initialize(&i8042_mouse_irq);
184	i8042_mouse_irq.devno = mouse_devno;	184	i8042_mouse_irq.devno = mouse_devno;
185	i8042_mouse_irq.inr = mouse_inr;	185	i8042_mouse_irq.inr = mouse_inr;
186	i8042_mouse_irq.claim = i8042_claim;	186	i8042_mouse_irq.claim = i8042_claim;
187	i8042_mouse_irq.handler = i8042_mouse_irq_handler;	187	i8042_mouse_irq.handler = i8042_mouse_irq_handler;
188	irq_register(&i8042_mouse_irq);	188	irq_register(&i8042_mouse_irq);
189		189
190	trap_virtual_enable_irqs(1 << kbd_inr);	190	trap_virtual_enable_irqs(1 << kbd_inr);
191	trap_virtual_enable_irqs(1 << mouse_inr);	191	trap_virtual_enable_irqs(1 << mouse_inr);
192		192
193	/*	193	/*
194	* Clear input buffer.	194	* Clear input buffer.
195	* Number of iterations is limited to prevent infinite looping.	195	* Number of iterations is limited to prevent infinite looping.
196	*/	196	*/
197	int i;	197	int i;
198	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {	198	for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
199	i8042_data_read();	199	i8042_data_read();
200	}	200	}
201		201
202	sysinfo_set_item_val("kbd", NULL, true);	202	sysinfo_set_item_val("kbd", NULL, true);
203	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);	203	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
204	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);	204	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
205		205
206	sysinfo_set_item_val("mouse", NULL, true);	206	sysinfo_set_item_val("mouse", NULL, true);
207	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);	207	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
208	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);	208	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
209		209
210	i8042_grab();	210	i8042_grab();
211	}	211	}
212		212
213	/* Called from getc(). */	213	/* Called from getc(). */
214	void i8042_resume(chardev_t *d)	214	void i8042_resume(chardev_t *d)
215	{	215	{
216	}	216	}
217		217
218	/* Called from getc(). */	218	/* Called from getc(). */
219	void i8042_suspend(chardev_t *d)	219	void i8042_suspend(chardev_t *d)
220	{	220	{
221	}	221	}
222		222
223	char i8042_key_read(chardev_t *d)	223	char i8042_key_read(chardev_t *d)
224	{	224	{
225	char ch;	225	char ch;
226		226
227	while(!(ch = active_read_buff_read())) {	227	while(!(ch = active_read_buff_read())) {
228	uint8_t x;	228	uint8_t x;
229	while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))	229	while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
230	;	230	;
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	active_read_key_pressed(x);	235	active_read_key_pressed(x);
236	}	236	}
237	return ch;	237	return ch;
238	}	238	}
239		239
240	/** Poll for key press and release events.	240	/** Poll for key press and release events.
241	*	241	*
242	* This function can be used to implement keyboard polling.	242	* This function can be used to implement keyboard polling.
243	*/	243	*/
244	void i8042_poll(void)	244	void i8042_poll(void)
245	{	245	{
246	uint8_t x;	246	uint8_t x;
247		247
248	while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {	248	while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
249	x = i8042_data_read();	249	x = i8042_data_read();
250	if (x & KEY_RELEASE)	250	if (x & KEY_RELEASE)
251	key_released(x ^ KEY_RELEASE);	251	key_released(x ^ KEY_RELEASE);
252	else	252	else
253	key_pressed(x);	253	key_pressed(x);
254	}	254	}
255	}	255	}
256		256
257	/** @}	257	/** @}
258	*/	258	*/
259		259

Subversion Repositories HelenOS

(root)/branches/rcu/kernel/genarch/src/kbd/i8042.c – Rev 2456 → 2463