WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/kbd/i8042.c


/*
 * Copyright (c) 2009 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>
 
 
/* 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);
   
 
 
 
 
 
 
 
 
 
 
 
    return true;
}
 
/* Called from getc(). */
void i8042_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void i8042_suspend(chardev_t *d)
{
}
 
/** @}
 */
 

Rev 3981	Rev 3982
1	/*	1	/*
2	* Copyright (c) 2001-2004 Jakub Jermar	2	* Copyright (c) 2009 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>	-
52		51
53	/* Keyboard commands. */	52	/* Keyboard commands. */
54	#define KBD_ENABLE 0xf4	53	#define KBD_ENABLE 0xf4
55	#define KBD_DISABLE 0xf5	54	#define KBD_DISABLE 0xf5
56	#define KBD_ACK 0xfa	55	#define KBD_ACK 0xfa
57		56
58	/*	57	/*
59	* 60 Write 8042 Command Byte: next data byte written to port 60h is	58	* 60 Write 8042 Command Byte: next data byte written to port 60h is
60	* placed in 8042 command register. Format:	59	* placed in 8042 command register. Format:
61	*	60	*
62	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte	61	* \|7\|6\|5\|4\|3\|2\|1\|0\|8042 Command Byte
63	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt	62	* \| \| \| \| \| \| \| `---- 1=enable output register full interrupt
64	* \| \| \| \| \| \| `----- should be 0	63	* \| \| \| \| \| \| `----- should be 0
65	* \| \| \| \| \| `------ 1=set status register system, 0=clear	64	* \| \| \| \| \| `------ 1=set status register system, 0=clear
66	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit	65	* \| \| \| \| `------- 1=override keyboard inhibit, 0=allow inhibit
67	* \| \| \| `-------- disable keyboard I/O by driving clock line low	66	* \| \| \| `-------- disable keyboard I/O by driving clock line low
68	* \| \| `--------- disable auxiliary device, drives clock line low	67	* \| \| `--------- disable auxiliary device, drives clock line low
69	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT	68	* \| `---------- IBM scancode translation 0=AT, 1=PC/XT
70	* `----------- reserved, should be 0	69	* `----------- reserved, should be 0
71	*/	70	*/
72		71
73	#define i8042_SET_COMMAND 0x60	72	#define i8042_SET_COMMAND 0x60
74	#define i8042_COMMAND 0x69	73	#define i8042_COMMAND 0x69
75		74
76	#define i8042_BUFFER_FULL_MASK 0x01	75	#define i8042_BUFFER_FULL_MASK 0x01
77	#define i8042_WAIT_MASK 0x02	76	#define i8042_WAIT_MASK 0x02
78	#define i8042_MOUSE_DATA 0x20	77	#define i8042_MOUSE_DATA 0x20
79		78
80	static void i8042_suspend(chardev_t *);	79	static void i8042_suspend(chardev_t *);
81	static void i8042_resume(chardev_t *);	80	static void i8042_resume(chardev_t *);
82		81
83	static chardev_operations_t ops = {	82	static chardev_operations_t ops = {
84	.suspend = i8042_suspend,	83	.suspend = i8042_suspend,
85	.resume = i8042_resume,	84	.resume = i8042_resume,
86	};	85	};
87		86
88	static irq_ownership_t i8042_claim(irq_t *irq)	87	static irq_ownership_t i8042_claim(irq_t *irq)
89	{	88	{
90	i8042_instance_t *i8042_instance = irq->instance;	89	i8042_instance_t *i8042_instance = irq->instance;
91	i8042_t *dev = i8042_instance->i8042;	90	i8042_t *dev = i8042_instance->i8042;
92	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)	91	if (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
93	return IRQ_ACCEPT;	92	return IRQ_ACCEPT;
94	else	93	else
95	return IRQ_DECLINE;	94	return IRQ_DECLINE;
96	}	95	}
97		96
98	static void i8042_irq_handler(irq_t *irq)	97	static void i8042_irq_handler(irq_t *irq)
99	{	98	{
100	i8042_instance_t *instance = irq->instance;	99	i8042_instance_t *instance = irq->instance;
101	i8042_t *dev = instance->i8042;	100	i8042_t *dev = instance->i8042;
102		101
103	uint8_t data;	102	uint8_t data;
104	uint8_t status;	103	uint8_t status;
105		104
106	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {	105	if (((status = pio_read_8(&dev->status)) & i8042_BUFFER_FULL_MASK)) {
107	data = pio_read_8(&dev->data);	106	data = pio_read_8(&dev->data);
108		107
109	if ((status & i8042_MOUSE_DATA))	108	if ((status & i8042_MOUSE_DATA))
110	return;	109	return;
111		110
112	if (data & KEY_RELEASE)	111	if (data & KEY_RELEASE)
113	key_released(data ^ KEY_RELEASE);	112	key_released(data ^ KEY_RELEASE);
114	else	113	else
115	key_pressed(data);	114	key_pressed(data);
116	}	115	}
117	}	116	}
118		117
119	/** Initialize i8042. */	118	/** Initialize i8042. */
120	bool	119	bool
121	i8042_init(i8042_t *dev, devno_t devno, inr_t inr)	120	i8042_init(i8042_t *dev, devno_t devno, inr_t inr)
122	{	121	{
123	i8042_instance_t *instance;	122	i8042_instance_t *instance;
124		123
125	chardev_initialize("i8042_kbd", &kbrd, &ops);	124	chardev_initialize("i8042_kbd", &kbrd, &ops);
126	stdin = &kbrd;	125	stdin = &kbrd;
127		126
128	instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC);	127	instance = malloc(sizeof(i8042_instance_t), FRAME_ATOMIC);
129	if (!instance)	128	if (!instance)
130	return false;	129	return false;
131		130
132	instance->devno = devno;	131	instance->devno = devno;
133	instance->i8042 = dev;	132	instance->i8042 = dev;
134		133
135	irq_initialize(&instance->irq);	134	irq_initialize(&instance->irq);
136	instance->irq.devno = devno;	135	instance->irq.devno = devno;
137	instance->irq.inr = inr;	136	instance->irq.inr = inr;
138	instance->irq.claim = i8042_claim;	137	instance->irq.claim = i8042_claim;
139	instance->irq.handler = i8042_irq_handler;	138	instance->irq.handler = i8042_irq_handler;
140	instance->irq.instance = instance;	139	instance->irq.instance = instance;
141	irq_register(&instance->irq);	140	irq_register(&instance->irq);
142		141
143	trap_virtual_enable_irqs(1 << inr);	142	trap_virtual_enable_irqs(1 << inr);
144		143
145	/*	144	/*
146	* Clear input buffer.	145	* Clear input buffer.
147	*/	146	*/
148	while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)	147	while (pio_read_8(&dev->status) & i8042_BUFFER_FULL_MASK)
149	(void) pio_read_8(&dev->data);	148	(void) pio_read_8(&dev->data);
150		149
151	/*	-
152	* This is the necessary evil until the userspace driver is entirely	-
153	* self-sufficient.	-
154	*/	-
155	sysinfo_set_item_val("kbd", NULL, true);	-
156	sysinfo_set_item_val("kbd.devno", NULL, devno);	-
157	sysinfo_set_item_val("kbd.inr", NULL, inr);	-
158	#ifdef KBD_LEGACY	-
159	sysinfo_set_item_val("kbd.type", NULL, KBD_LEGACY);	-
160	#endif	-
161		-
162	return true;	150	return true;
163	}	151	}
164		152
165	/* Called from getc(). */	153	/* Called from getc(). */
166	void i8042_resume(chardev_t *d)	154	void i8042_resume(chardev_t *d)
167	{	155	{
168	}	156	}
169		157
170	/* Called from getc(). */	158	/* Called from getc(). */
171	void i8042_suspend(chardev_t *d)	159	void i8042_suspend(chardev_t *d)
172	{	160	{
173	}	161	}
174		162
175	/** @}	163	/** @}
176	*/	164	*/
177		165

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/i8042.c – Rev 3981 → 3982