WebSVN – HelenOS – Diff – /trunk/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 <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 *) 0x60,
};
 
/* 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;
}
 
/** @}
 */
 

Rev 3928	Rev 3931
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 <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	#define i8042_DATA 0x60	53	i8042_instance_t lgcy_i8042_instance = {
54	#define i8042_STATUS 0x64	54	.i8042 = (i8042_t *) 0x60,
-		55	};
55		56
56	/* Keyboard commands. */	57	/* Keyboard commands. */
57	#define KBD_ENABLE 0xf4	58	#define KBD_ENABLE 0xf4
58	#define KBD_DISABLE 0xf5	59	#define KBD_DISABLE 0xf5
59	#define KBD_ACK 0xfa	60	#define KBD_ACK 0xfa
60		61
61	/*	62	/*
62	* 60 Write 8042 Command Byte: next data byte written to port 60h is	63	* 60 Write 8042 Command Byte: next data byte written to port 60h is
63	* placed in 8042 command register. Format:	64	* placed in 8042 command register. Format:
64	*	65	*
65	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	66	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
66	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	67	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
67	* \| \| \| \| \| \| `----- should be 0	68	* \| \| \| \| \| \| `----- should be 0
68	* \| \| \| \| \| `------ 1=set status register system, 0=clear	69	* \| \| \| \| \| `------ 1=set status register system, 0=clear
69	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	70	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
70	* \| \| \| `-------- disable keyboard I/O by driving clock line low	71	* \| \| \| `-------- disable keyboard I/O by driving clock line low
71	* \| \| `--------- disable auxiliary device, drives clock line low	72	* \| \| `--------- disable auxiliary device, drives clock line low
72	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	73	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
73	* `----------- reserved, should be 0	74	* `----------- reserved, should be 0
74	*/	75	*/
75		76
76	#define i8042_SET_COMMAND 0x60	77	#define i8042_SET_COMMAND 0x60
77	#define i8042_COMMAND 0x69	78	#define i8042_COMMAND 0x69
78		79
79	#define i8042_BUFFER_FULL_MASK 0x01	80	#define i8042_BUFFER_FULL_MASK 0x01
80	#define i8042_WAIT_MASK 0x02	81	#define i8042_WAIT_MASK 0x02
81	#define i8042_MOUSE_DATA 0x20	82	#define i8042_MOUSE_DATA 0x20
82		83
83	static void i8042_suspend(chardev_t *);	84	static void i8042_suspend(chardev_t *);
84	static void i8042_resume(chardev_t *);	85	static void i8042_resume(chardev_t *);
85		86
86	static chardev_operations_t ops = {	87	static chardev_operations_t ops = {
87	.suspend = i8042_suspend,	88	.suspend = i8042_suspend,
88	.resume = i8042_resume,	89	.resume = i8042_resume,
89	.read = i8042_key_read	90	.read = i8042_key_read
90	};	91	};
91		92
92	/** Structure for i8042's IRQ. */	93	/** Structure for i8042's IRQ. */
93	static irq_t i8042_kbd_irq;	94	static irq_t i8042_kbd_irq;
94	static irq_t i8042_mouse_irq;	95	static irq_t i8042_mouse_irq;
95		96
96	void i8042_grab(void)	97	void i8042_grab(void)
97	{	98	{
98	ipl_t ipl = interrupts_disable();	99	ipl_t ipl = interrupts_disable();
99		100
100	spinlock_lock(&i8042_kbd_irq.lock);	101	spinlock_lock(&i8042_kbd_irq.lock);
101	i8042_kbd_irq.notif_cfg.notify = false;	102	i8042_kbd_irq.notif_cfg.notify = false;
102	spinlock_unlock(&i8042_kbd_irq.lock);	103	spinlock_unlock(&i8042_kbd_irq.lock);
103		104
104	spinlock_lock(&i8042_mouse_irq.lock);	105	spinlock_lock(&i8042_mouse_irq.lock);
105	i8042_mouse_irq.notif_cfg.notify = false;	106	i8042_mouse_irq.notif_cfg.notify = false;
106	spinlock_unlock(&i8042_mouse_irq.lock);	107	spinlock_unlock(&i8042_mouse_irq.lock);
107		108
108	interrupts_restore(ipl);	109	interrupts_restore(ipl);
109	}	110	}
110		111
111	void i8042_release(void)	112	void i8042_release(void)
112	{	113	{
113	ipl_t ipl = interrupts_disable();	114	ipl_t ipl = interrupts_disable();
114		115
115	spinlock_lock(&i8042_kbd_irq.lock);	116	spinlock_lock(&i8042_kbd_irq.lock);
116	if (i8042_kbd_irq.notif_cfg.answerbox)	117	if (i8042_kbd_irq.notif_cfg.answerbox)
117	i8042_kbd_irq.notif_cfg.notify = true;	118	i8042_kbd_irq.notif_cfg.notify = true;
118	spinlock_unlock(&i8042_kbd_irq.lock);	119	spinlock_unlock(&i8042_kbd_irq.lock);
119		120
120	spinlock_lock(&i8042_mouse_irq.lock);	121	spinlock_lock(&i8042_mouse_irq.lock);
121	if (i8042_mouse_irq.notif_cfg.answerbox)	122	if (i8042_mouse_irq.notif_cfg.answerbox)
122	i8042_mouse_irq.notif_cfg.notify = true;	123	i8042_mouse_irq.notif_cfg.notify = true;
123	spinlock_unlock(&i8042_mouse_irq.lock);	124	spinlock_unlock(&i8042_mouse_irq.lock);
124		125
125	interrupts_restore(ipl);	126	interrupts_restore(ipl);
126	}	127	}
127		128
128	static irq_ownership_t i8042_claim(void *instance)	129	static irq_ownership_t i8042_claim(void *instance)
129	{	130	{
-		131	i8042_instance_t *i8042_instance = instance;
-		132	i8042_t *dev = i8042_instance->i8042;
-		133	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
130	return IRQ_ACCEPT;	134	return IRQ_ACCEPT;
-		135	else
-		136	return IRQ_DECLINE;
131	}	137	}
132		138
133	static void i8042_irq_handler(irq_t *irq)	139	static void i8042_irq_handler(irq_t *irq)
134	{	140	{
135	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)	141	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox) {
-		142	/*
-		143	* This will hopefully go to the IRQ dispatcher code soon.
-		144	*/
136	ipc_irq_send_notif(irq);	145	ipc_irq_send_notif(irq);
137	else {	146	return;
-		147	}
-		148
-		149	i8042_instance_t *instance = irq->instance;
-		150	i8042_t *dev = instance->i8042;
-		151
138	uint8_t data;	152	uint8_t data;
139	uint8_t status;	153	uint8_t status;
140		154
141	while (((status = pio_read_8(i8042_STATUS)) &	155	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {
142	i8042_BUFFER_FULL_MASK)) {	-
143	data = pio_read_8(i8042_DATA);	156	data = pio_read_8(&dev->data);
144		157
145	if ((status & i8042_MOUSE_DATA))	158	if ((status & i8042_MOUSE_DATA))
146	continue;	159	return;
147		160
148	if (data & KEY_RELEASE)	161	if (data & KEY_RELEASE)
149	key_released(data ^ KEY_RELEASE);	162	key_released(data ^ KEY_RELEASE);
150	else	163	else
151	key_pressed(data);	164	key_pressed(data);
152	}	-
153	}	165	}
154	}	166	}
155		167
156	/** Initialize i8042. */	168	/** Initialize i8042. */
157	void	169	void
158	i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno,	170	i8042_init(devno_t kbd_devno, inr_t kbd_inr, devno_t mouse_devno,
159	inr_t mouse_inr)	171	inr_t mouse_inr)
160	{	172	{
-		173	i8042_t *dev = lgcy_i8042_instance.i8042;
-		174
161	chardev_initialize("i8042_kbd", &kbrd, &ops);	175	chardev_initialize("i8042_kbd", &kbrd, &ops);
162	stdin = &kbrd;	176	stdin = &kbrd;
163		177
164	irq_initialize(&i8042_kbd_irq);	178	irq_initialize(&i8042_kbd_irq);
165	i8042_kbd_irq.devno = kbd_devno;	179	i8042_kbd_irq.devno = kbd_devno;
166	i8042_kbd_irq.inr = kbd_inr;	180	i8042_kbd_irq.inr = kbd_inr;
167	i8042_kbd_irq.claim = i8042_claim;	181	i8042_kbd_irq.claim = i8042_claim;
168	i8042_kbd_irq.handler = i8042_irq_handler;	182	i8042_kbd_irq.handler = i8042_irq_handler;
-		183	i8042_kbd_irq.instance = &lgcy_i8042_instance;
169	irq_register(&i8042_kbd_irq);	184	irq_register(&i8042_kbd_irq);
170		185
171	irq_initialize(&i8042_mouse_irq);	186	irq_initialize(&i8042_mouse_irq);
172	i8042_mouse_irq.devno = mouse_devno;	187	i8042_mouse_irq.devno = mouse_devno;
173	i8042_mouse_irq.inr = mouse_inr;	188	i8042_mouse_irq.inr = mouse_inr;
174	i8042_mouse_irq.claim = i8042_claim;	189	i8042_mouse_irq.claim = i8042_claim;
175	i8042_mouse_irq.handler = i8042_irq_handler;	190	i8042_mouse_irq.handler = i8042_irq_handler;
-		191	i8042_mouse_irq.instance = &lgcy_i8042_instance;
176	irq_register(&i8042_mouse_irq);	192	irq_register(&i8042_mouse_irq);
177		193
178	trap_virtual_enable_irqs(1 << kbd_inr);	194	trap_virtual_enable_irqs(1 << kbd_inr);
179	trap_virtual_enable_irqs(1 << mouse_inr);	195	trap_virtual_enable_irqs(1 << mouse_inr);
180		196
181	/*	197	/*
182	* Clear input buffer.	198	* Clear input buffer.
183	* Number of iterations is limited to prevent infinite looping.	199	* Number of iterations is limited to prevent infinite looping.
184	*/	200	*/
185	int i;	201	int i;
186	for (i = 0; (pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK) &&	202	for (i = 0; (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK) &&
187	i < 100; i++) {	203	i < 100; i++) {
188	(void) pio_read_8(i8042_DATA);	204	(void) pio_read_8(&dev->data);
189	}	205	}
190		206
191	sysinfo_set_item_val("kbd", NULL, true);	207	sysinfo_set_item_val("kbd", NULL, true);
192	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);	208	sysinfo_set_item_val("kbd.devno", NULL, kbd_devno);
193	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);	209	sysinfo_set_item_val("kbd.inr", NULL, kbd_inr);
194	#ifdef KBD_LEGACY	210	#ifdef KBD_LEGACY
195	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);	211	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);
196	#endif	212	#endif
197	sysinfo_set_item_val("mouse", NULL, true);	213	sysinfo_set_item_val("mouse", NULL, true);
198	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);	214	sysinfo_set_item_val("mouse.devno", NULL, mouse_devno);
199	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);	215	sysinfo_set_item_val("mouse.inr", NULL, mouse_inr);
200		216
201	i8042_grab();	217	i8042_grab();
202	}	218	}
203		219
204	/* Called from getc(). */	220	/* Called from getc(). */
205	void i8042_resume(chardev_t *d)	221	void i8042_resume(chardev_t *d)
206	{	222	{
207	}	223	}
208		224
209	/* Called from getc(). */	225	/* Called from getc(). */
210	void i8042_suspend(chardev_t *d)	226	void i8042_suspend(chardev_t *d)
211	{	227	{
212	}	228	}
213		229
214	char i8042_key_read(chardev_t *d)	230	char i8042_key_read(chardev_t *d)
215	{	231	{
-		232	i8042_t *dev = lgcy_i8042_instance.i8042;
216	char ch;	233	char ch;
217		234
218	while (!(ch = active_read_buff_read())) {	235	while (!(ch = active_read_buff_read())) {
219	uint8_t x;	236	uint8_t x;
220		237
221	while (!(pio_read_8(i8042_STATUS) & i8042_BUFFER_FULL_MASK))	238	while (!(pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK))
222	;	239	;
223		240
224	x = pio_read_8(i8042_STATUS);	241	x = pio_read_8(&dev->data);
225	if (x & KEY_RELEASE)	242	if (x & KEY_RELEASE)
226	key_released(x ^ KEY_RELEASE);	243	key_released(x ^ KEY_RELEASE);
227	else	244	else
228	active_read_key_pressed(x);	245	active_read_key_pressed(x);
229	}	246	}
230	return ch;	247	return ch;
231	}	248	}
232		249
233	/** @}	250	/** @}
234	*/	251	*/
235		252

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/drivers/i8042/i8042.c @ 4313 – Rev 3928 → 3931