WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/kbd/ns16550.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   NS 16550 serial port / keyboard driver.
 */
 
#include <genarch/kbd/ns16550.h>
#include <genarch/kbd/key.h>
#include <genarch/kbd/scanc.h>
#include <genarch/kbd/scanc_sun.h>
#include <arch/drivers/ns16550.h>
#include <arch/interrupt.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch.h>
#include <typedefs.h>
#include <console/chardev.h>
#include <console/console.h>
#include <interrupt.h>
#include <sysinfo/sysinfo.h>
 
#define LSR_DATA_READY  0x01
 
/*
 * These codes read from ns16550 data register are silently ignored.
 */
#define IGNORE_CODE 0x7f        /* all keys up */
 
static void ns16550_suspend(chardev_t *);
static void ns16550_resume(chardev_t *);
 
static chardev_operations_t ops = {
    .suspend = ns16550_suspend,
    .resume = ns16550_resume,
    .read = ns16550_key_read
};
 
void ns16550_interrupt(int n, istate_t *istate);
void ns16550_wait(void);
 
/** Initialize keyboard and service interrupts using kernel routine */
void ns16550_grab(void)
{
    /* TODO */
}
 
/** Resume the former interrupt vector */
void ns16550_release(void)
{
    /* TODO */
}
 
/** Initialize ns16550. */
void ns16550_init(void)
{
    ns16550_grab();
    chardev_initialize("ns16550_kbd", &kbrd, &ops);
    stdin = &kbrd;
   
    sysinfo_set_item_val("kbd", NULL, true);
    sysinfo_set_item_val("kbd.irq", NULL, 0);
    sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
   
    ns16550_ier_write(IER_ERBFI);               /* enable receiver interrupt */
   
    while (ns16550_lsr_read() & LSR_DATA_READY)
        (void) ns16550_rbr_read();
}
 
/** Process ns16550 interrupt.
 *
 * @param n Interrupt vector.
 * @param istate Interrupted state.
 */
void ns16550_interrupt(int n, istate_t *istate)
{
    /* TODO */
}
 
/** Wait until the controller reads its data. */
void ns16550_wait(void)
{
}
 
/* Called from getc(). */
void ns16550_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void ns16550_suspend(chardev_t *d)
{
}
 
char ns16550_key_read(chardev_t *d)
{
    char ch;   
 
    while(!(ch = active_read_buff_read())) {
        uint8_t x;
        while (!(ns16550_lsr_read() & LSR_DATA_READY))
            ;
        x = ns16550_rbr_read();
        if (x != IGNORE_CODE) {
            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 ns16550_poll(void)
{
    uint8_t x;
 
    while (ns16550_lsr_read() & LSR_DATA_READY) {
        x = ns16550_rbr_read();
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
    }
}
 
/** @}
 */
 

Rev 1896	Rev 1911
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 NS 16550 serial port / keyboard driver.	34	* @brief NS 16550 serial port / keyboard driver.
35	*/	35	*/
36		36
37	#include <genarch/kbd/ns16550.h>	37	#include <genarch/kbd/ns16550.h>
38	#include <genarch/kbd/key.h>	38	#include <genarch/kbd/key.h>
39	#include <genarch/kbd/scanc.h>	39	#include <genarch/kbd/scanc.h>
40	#include <genarch/kbd/scanc_sun.h>	40	#include <genarch/kbd/scanc_sun.h>
41	#include <arch/drivers/ns16550.h>	41	#include <arch/drivers/ns16550.h>
42	#include <arch/interrupt.h>	42	#include <arch/interrupt.h>
43	#include <cpu.h>	43	#include <cpu.h>
44	#include <arch/asm.h>	44	#include <arch/asm.h>
45	#include <arch.h>	45	#include <arch.h>
46	#include <typedefs.h>	46	#include <typedefs.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		51
52	#define LSR_DATA_READY 0x01	52	#define LSR_DATA_READY 0x01
53		53
54	/*	54	/*
55	* These codes read from ns16550 data register are silently ignored.	55	* These codes read from ns16550 data register are silently ignored.
56	*/	56	*/
57	#define IGNORE_CODE 0x7f /* all keys up */	57	#define IGNORE_CODE 0x7f /* all keys up */
58		58
59	static void ns16550_suspend(chardev_t *);	59	static void ns16550_suspend(chardev_t *);
60	static void ns16550_resume(chardev_t *);	60	static void ns16550_resume(chardev_t *);
61		61
62	static chardev_operations_t ops = {	62	static chardev_operations_t ops = {
63	.suspend = ns16550_suspend,	63	.suspend = ns16550_suspend,
64	.resume = ns16550_resume,	64	.resume = ns16550_resume,
65	.read = ns16550_key_read	65	.read = ns16550_key_read
66	};	66	};
67		67
68	void ns16550_interrupt(int n, istate_t *istate);	68	void ns16550_interrupt(int n, istate_t *istate);
69	void ns16550_wait(void);	69	void ns16550_wait(void);
70		70
71	/** Initialize keyboard and service interrupts using kernel routine */	71	/** Initialize keyboard and service interrupts using kernel routine */
72	void ns16550_grab(void)	72	void ns16550_grab(void)
73	{	73	{
74	/* TODO */	74	/* TODO */
75	}	75	}
76		76
77	/** Resume the former interrupt vector */	77	/** Resume the former interrupt vector */
78	void ns16550_release(void)	78	void ns16550_release(void)
79	{	79	{
80	/* TODO */	80	/* TODO */
81	}	81	}
82		82
83	/** Initialize ns16550. */	83	/** Initialize ns16550. */
84	void ns16550_init(void)	84	void ns16550_init(void)
85	{	85	{
86	ns16550_grab();	86	ns16550_grab();
87	chardev_initialize("ns16550_kbd", &kbrd, &ops);	87	chardev_initialize("ns16550_kbd", &kbrd, &ops);
88	stdin = &kbrd;	88	stdin = &kbrd;
89		89
90	sysinfo_set_item_val("kbd", NULL, true);	90	sysinfo_set_item_val("kbd", NULL, true);
91	sysinfo_set_item_val("kbd.irq", NULL, 0);	91	sysinfo_set_item_val("kbd.irq", NULL, 0);
92	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);	92	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
-		93
-		94	ns16550_ier_write(IER_ERBFI); /* enable receiver interrupt */
-		95
-		96	while (ns16550_lsr_read() & LSR_DATA_READY)
-		97	(void) ns16550_rbr_read();
93	}	98	}
94		99
95	/** Process ns16550 interrupt.	100	/** Process ns16550 interrupt.
96	*	101	*
97	* @param n Interrupt vector.	102	* @param n Interrupt vector.
98	* @param istate Interrupted state.	103	* @param istate Interrupted state.
99	*/	104	*/
100	void ns16550_interrupt(int n, istate_t *istate)	105	void ns16550_interrupt(int n, istate_t *istate)
101	{	106	{
102	/* TODO */	107	/* TODO */
103	}	108	}
104		109
105	/** Wait until the controller reads its data. */	110	/** Wait until the controller reads its data. */
106	void ns16550_wait(void)	111	void ns16550_wait(void)
107	{	112	{
108	}	113	}
109		114
110	/* Called from getc(). */	115	/* Called from getc(). */
111	void ns16550_resume(chardev_t *d)	116	void ns16550_resume(chardev_t *d)
112	{	117	{
113	}	118	}
114		119
115	/* Called from getc(). */	120	/* Called from getc(). */
116	void ns16550_suspend(chardev_t *d)	121	void ns16550_suspend(chardev_t *d)
117	{	122	{
118	}	123	}
119		124
120	char ns16550_key_read(chardev_t *d)	125	char ns16550_key_read(chardev_t *d)
121	{	126	{
122	char ch;	127	char ch;
123		128
124	while(!(ch = active_read_buff_read())) {	129	while(!(ch = active_read_buff_read())) {
125	uint8_t x;	130	uint8_t x;
126	while (!(ns16550_lsr_read() & LSR_DATA_READY))	131	while (!(ns16550_lsr_read() & LSR_DATA_READY))
127	;	132	;
128	x = ns16550_rbr_read();	133	x = ns16550_rbr_read();
129	if (x != IGNORE_CODE) {	134	if (x != IGNORE_CODE) {
130	if (x & KEY_RELEASE)	135	if (x & KEY_RELEASE)
131	key_released(x ^ KEY_RELEASE);	136	key_released(x ^ KEY_RELEASE);
132	else	137	else
133	active_read_key_pressed(x);	138	active_read_key_pressed(x);
134	}	139	}
135	}	140	}
136	return ch;	141	return ch;
137	}	142	}
138		143
139	/** Poll for key press and release events.	144	/** Poll for key press and release events.
140	*	145	*
141	* This function can be used to implement keyboard polling.	146	* This function can be used to implement keyboard polling.
142	*/	147	*/
143	void ns16550_poll(void)	148	void ns16550_poll(void)
144	{	149	{
145	uint8_t x;	150	uint8_t x;
146		151
147	while (((x = ns16550_lsr_read() & LSR_DATA_READY))) {	152	while (ns16550_lsr_read() & LSR_DATA_READY) {
148	x = ns16550_rbr_read();	153	x = ns16550_rbr_read();
149	if (x != IGNORE_CODE) {	154	if (x != IGNORE_CODE) {
150	if (x & KEY_RELEASE)	155	if (x & KEY_RELEASE)
151	key_released(x ^ KEY_RELEASE);	156	key_released(x ^ KEY_RELEASE);
152	else	157	else
153	key_pressed(x);	158	key_pressed(x);
154	}	159	}
155	}	160	}
156	}	161	}
157		162
158	/** @}	163	/** @}
159	*/	164	*/
160		165

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 1896 → 1911