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 <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>
 
 
 
 
 
/* 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,
};
 
static irq_ownership_t i8042_claim(irq_t *irq)
{
    i8042_instance_t *i8042_instance = irq->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)
{
    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. */
bool
i8042_init(i8042_t *dev, devno_t devno, inr_t inr)
{
    i8042_instance_t *instance;
 
    chardev_initialize("i8042_kbd", &kbrd, &ops);
    stdin = &kbrd;
   
    instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC);
    if (!instance)
        return false;
   
    instance->devno = devno;
    instance->i8042 = dev;
   
    irq_initialize(&instance->irq);
    instance->irq.devno = devno;
    instance->irq.inr = inr;
    instance->irq.claim = i8042_claim;
    instance->irq.handler = i8042_irq_handler;
    instance->irq.instance = instance;
    irq_register(&instance->irq);
   
    trap_virtual_enable_irqs(1 << inr);
   
    /*
     * Clear input buffer.
     */
    while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
        (void) pio_read_8(&dev->data);
   
    /*
     * This is the necessary evil until the userspace driver is entirely
     * self-sufficient.
     */
    sysinfo_set_item_val("kbd", NULL, true);
    sysinfo_set_item_val("kbd.devno", NULL, devno);
    sysinfo_set_item_val("kbd.inr", NULL, inr);
#ifdef KBD_LEGACY
    sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);
#endif
 
    return true;
}
 
/* Called from getc(). */
void i8042_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void i8042_suspend(chardev_t *d)
{
}
 
/** @}
 */
 

Rev 3963	Rev 3981
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 <genarch/drivers/legacy/ia32/io.h>
45	#include <cpu.h>	45	#include <cpu.h>
46	#include <arch/asm.h>	46	#include <arch/asm.h>
47	#include <arch.h>	47	#include <arch.h>
48	#include <console/chardev.h>	48	#include <console/chardev.h>
49	#include <console/console.h>	49	#include <console/console.h>
50	#include <interrupt.h>	50	#include <interrupt.h>
51	#include <sysinfo/sysinfo.h>	51	#include <sysinfo/sysinfo.h>
52		52
53	i8042_instance_t lgcy_i8042_instance = {	-
54	.i8042 = (i8042_t *) I8042_BASE,	-
55	};	-
56		-
57	/* Keyboard commands. */	53	/* Keyboard commands. */
58	#define KBD_ENABLE 0xf4	54	#define KBD_ENABLE 0xf4
59	#define KBD_DISABLE 0xf5	55	#define KBD_DISABLE 0xf5
60	#define KBD_ACK 0xfa	56	#define KBD_ACK 0xfa
61		57
62	/*	58	/*
63	* 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
64	* placed in 8042 command register. Format:	60	* placed in 8042 command register. Format:
65	*	61	*
66	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	62	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
67	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	63	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
68	* \| \| \| \| \| \| `----- should be 0	64	* \| \| \| \| \| \| `----- should be 0
69	* \| \| \| \| \| `------ 1=set status register system, 0=clear	65	* \| \| \| \| \| `------ 1=set status register system, 0=clear
70	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	66	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
71	* \| \| \| `-------- disable keyboard I/O by driving clock line low	67	* \| \| \| `-------- disable keyboard I/O by driving clock line low
72	* \| \| `--------- disable auxiliary device, drives clock line low	68	* \| \| `--------- disable auxiliary device, drives clock line low
73	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	69	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
74	* `----------- reserved, should be 0	70	* `----------- reserved, should be 0
75	*/	71	*/
76		72
77	#define i8042_SET_COMMAND 0x60	73	#define i8042_SET_COMMAND 0x60
78	#define i8042_COMMAND 0x69	74	#define i8042_COMMAND 0x69
79		75
80	#define i8042_BUFFER_FULL_MASK 0x01	76	#define i8042_BUFFER_FULL_MASK 0x01
81	#define i8042_WAIT_MASK 0x02	77	#define i8042_WAIT_MASK 0x02
82	#define i8042_MOUSE_DATA 0x20	78	#define i8042_MOUSE_DATA 0x20
83		79
84	static void i8042_suspend(chardev_t *);	80	static void i8042_suspend(chardev_t *);
85	static void i8042_resume(chardev_t *);	81	static void i8042_resume(chardev_t *);
86		82
87	static chardev_operations_t ops = {	83	static chardev_operations_t ops = {
88	.suspend = i8042_suspend,	84	.suspend = i8042_suspend,
89	.resume = i8042_resume,	85	.resume = i8042_resume,
90	};	86	};
91		87
92	static irq_ownership_t i8042_claim(irq_t *irq)	88	static irq_ownership_t i8042_claim(irq_t *irq)
93	{	89	{
94	i8042_instance_t *i8042_instance = irq->instance;	90	i8042_instance_t *i8042_instance = irq->instance;
95	i8042_t *dev = i8042_instance->i8042;	91	i8042_t *dev = i8042_instance->i8042;
96	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)	92	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
97	return IRQ_ACCEPT;	93	return IRQ_ACCEPT;
98	else	94	else
99	return IRQ_DECLINE;	95	return IRQ_DECLINE;
100	}	96	}
101		97
102	static void i8042_irq_handler(irq_t *irq)	98	static void i8042_irq_handler(irq_t *irq)
103	{	99	{
104	i8042_instance_t *instance = irq->instance;	100	i8042_instance_t *instance = irq->instance;
105	i8042_t *dev = instance->i8042;	101	i8042_t *dev = instance->i8042;
106		102
107	uint8_t data;	103	uint8_t data;
108	uint8_t status;	104	uint8_t status;
109		105
110	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {	106	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {
111	data = pio_read_8(&dev->data);	107	data = pio_read_8(&dev->data);
112		108
113	if ((status & i8042_MOUSE_DATA))	109	if ((status & i8042_MOUSE_DATA))
114	return;	110	return;
115		111
116	if (data & KEY_RELEASE)	112	if (data & KEY_RELEASE)
117	key_released(data ^ KEY_RELEASE);	113	key_released(data ^ KEY_RELEASE);
118	else	114	else
119	key_pressed(data);	115	key_pressed(data);
120	}	116	}
121	}	117	}
122		118
123	/** Initialize i8042. */	119	/** Initialize i8042. */
124	bool	120	bool
125	i8042_init(i8042_t *dev, devno_t devno, inr_t inr)	121	i8042_init(i8042_t *dev, devno_t devno, inr_t inr)
126	{	122	{
127	i8042_instance_t *instance;	123	i8042_instance_t *instance;
128		124
129	chardev_initialize("i8042_kbd", &kbrd, &ops);	125	chardev_initialize("i8042_kbd", &kbrd, &ops);
130	stdin = &kbrd;	126	stdin = &kbrd;
131		127
132	instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC);	128	instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC);
133	if (!instance)	129	if (!instance)
134	return false;	130	return false;
135		131
136	instance->devno = devno;	132	instance->devno = devno;
137	instance->i8042 = dev;	133	instance->i8042 = dev;
138		134
139	irq_initialize(&instance->irq);	135	irq_initialize(&instance->irq);
140	instance->irq.devno = devno;	136	instance->irq.devno = devno;
141	instance->irq.inr = inr;	137	instance->irq.inr = inr;
142	instance->irq.claim = i8042_claim;	138	instance->irq.claim = i8042_claim;
143	instance->irq.handler = i8042_irq_handler;	139	instance->irq.handler = i8042_irq_handler;
144	instance->irq.instance = instance;	140	instance->irq.instance = instance;
145	irq_register(&instance->irq);	141	irq_register(&instance->irq);
146		142
147	trap_virtual_enable_irqs(1 << inr);	143	trap_virtual_enable_irqs(1 << inr);
148		144
149	/*	145	/*
150	* Clear input buffer.	146	* Clear input buffer.
151	*/	147	*/
152	while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)	148	while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
153	(void) pio_read_8(&dev->data);	149	(void) pio_read_8(&dev->data);
154		150
155	/*	151	/*
156	* This is the necessary evil until the userspace driver is entirely	152	* This is the necessary evil until the userspace driver is entirely
157	* self-sufficient.	153	* self-sufficient.
158	*/	154	*/
159	sysinfo_set_item_val("kbd", NULL, true);	155	sysinfo_set_item_val("kbd", NULL, true);
160	sysinfo_set_item_val("kbd.devno", NULL, devno);	156	sysinfo_set_item_val("kbd.devno", NULL, devno);
161	sysinfo_set_item_val("kbd.inr", NULL, inr);	157	sysinfo_set_item_val("kbd.inr", NULL, inr);
162	#ifdef KBD_LEGACY	158	#ifdef KBD_LEGACY
163	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);	159	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);
164	#endif	160	#endif
165		161
166	return true;	162	return true;
167	}	163	}
168		164
169	/* Called from getc(). */	165	/* Called from getc(). */
170	void i8042_resume(chardev_t *d)	166	void i8042_resume(chardev_t *d)
171	{	167	{
172	}	168	}
173		169
174	/* Called from getc(). */	170	/* Called from getc(). */
175	void i8042_suspend(chardev_t *d)	171	void i8042_suspend(chardev_t *d)
176	{	172	{
177	}	173	}
178		174
179	/** @}	175	/** @}
180	*/	176	*/
181		177

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/drivers/i8042/i8042.c @ 4313 – Rev 3963 → 3981