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 <ddi/irq.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);
        }
    }
}
 
irq_ownership_t ns16550_claim(void)
{
    /* TODO */
    return IRQ_ACCEPT;
}
 
void ns16550_irq_handler(irq_t *irq, void *arg, ...)
{
    panic("Not yet implemented.\n");
}
 
/** @}
 */
 

Rev 1919	Rev 1920
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 <irq.h>	42	#include <ddi/irq.h>
43	#include <arch/interrupt.h>	43	#include <arch/interrupt.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 <typedefs.h>	47	#include <typedefs.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	#define LSR_DATA_READY 0x01	53	#define LSR_DATA_READY 0x01
54		54
55	/*	55	/*
56	* These codes read from ns16550 data register are silently ignored.	56	* These codes read from ns16550 data register are silently ignored.
57	*/	57	*/
58	#define IGNORE_CODE 0x7f /* all keys up */	58	#define IGNORE_CODE 0x7f /* all keys up */
59		59
60	static void ns16550_suspend(chardev_t *);	60	static void ns16550_suspend(chardev_t *);
61	static void ns16550_resume(chardev_t *);	61	static void ns16550_resume(chardev_t *);
62		62
63	static chardev_operations_t ops = {	63	static chardev_operations_t ops = {
64	.suspend = ns16550_suspend,	64	.suspend = ns16550_suspend,
65	.resume = ns16550_resume,	65	.resume = ns16550_resume,
66	.read = ns16550_key_read	66	.read = ns16550_key_read
67	};	67	};
68		68
69	void ns16550_interrupt(int n, istate_t *istate);	69	void ns16550_interrupt(int n, istate_t *istate);
70	void ns16550_wait(void);	70	void ns16550_wait(void);
71		71
72	/** Initialize keyboard and service interrupts using kernel routine */	72	/** Initialize keyboard and service interrupts using kernel routine */
73	void ns16550_grab(void)	73	void ns16550_grab(void)
74	{	74	{
75	/* TODO */	75	/* TODO */
76	}	76	}
77		77
78	/** Resume the former interrupt vector */	78	/** Resume the former interrupt vector */
79	void ns16550_release(void)	79	void ns16550_release(void)
80	{	80	{
81	/* TODO */	81	/* TODO */
82	}	82	}
83		83
84	/** Initialize ns16550. */	84	/** Initialize ns16550. */
85	void ns16550_init(void)	85	void ns16550_init(void)
86	{	86	{
87	ns16550_grab();	87	ns16550_grab();
88	chardev_initialize("ns16550_kbd", &kbrd, &ops);	88	chardev_initialize("ns16550_kbd", &kbrd, &ops);
89	stdin = &kbrd;	89	stdin = &kbrd;
90		90
91	sysinfo_set_item_val("kbd", NULL, true);	91	sysinfo_set_item_val("kbd", NULL, true);
92	sysinfo_set_item_val("kbd.irq", NULL, 0);	92	sysinfo_set_item_val("kbd.irq", NULL, 0);
93	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);	93	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);
94		94
95	ns16550_ier_write(IER_ERBFI); /* enable receiver interrupt */	95	ns16550_ier_write(IER_ERBFI); /* enable receiver interrupt */
96		96
97	while (ns16550_lsr_read() & LSR_DATA_READY)	97	while (ns16550_lsr_read() & LSR_DATA_READY)
98	(void) ns16550_rbr_read();	98	(void) ns16550_rbr_read();
99	}	99	}
100		100
101	/** Process ns16550 interrupt.	101	/** Process ns16550 interrupt.
102	*	102	*
103	* @param n Interrupt vector.	103	* @param n Interrupt vector.
104	* @param istate Interrupted state.	104	* @param istate Interrupted state.
105	*/	105	*/
106	void ns16550_interrupt(int n, istate_t *istate)	106	void ns16550_interrupt(int n, istate_t *istate)
107	{	107	{
108	/* TODO */	108	/* TODO */
109	}	109	}
110		110
111	/** Wait until the controller reads its data. */	111	/** Wait until the controller reads its data. */
112	void ns16550_wait(void)	112	void ns16550_wait(void)
113	{	113	{
114	}	114	}
115		115
116	/* Called from getc(). */	116	/* Called from getc(). */
117	void ns16550_resume(chardev_t *d)	117	void ns16550_resume(chardev_t *d)
118	{	118	{
119	}	119	}
120		120
121	/* Called from getc(). */	121	/* Called from getc(). */
122	void ns16550_suspend(chardev_t *d)	122	void ns16550_suspend(chardev_t *d)
123	{	123	{
124	}	124	}
125		125
126	char ns16550_key_read(chardev_t *d)	126	char ns16550_key_read(chardev_t *d)
127	{	127	{
128	char ch;	128	char ch;
129		129
130	while(!(ch = active_read_buff_read())) {	130	while(!(ch = active_read_buff_read())) {
131	uint8_t x;	131	uint8_t x;
132	while (!(ns16550_lsr_read() & LSR_DATA_READY))	132	while (!(ns16550_lsr_read() & LSR_DATA_READY))
133	;	133	;
134	x = ns16550_rbr_read();	134	x = ns16550_rbr_read();
135	if (x != IGNORE_CODE) {	135	if (x != IGNORE_CODE) {
136	if (x & KEY_RELEASE)	136	if (x & KEY_RELEASE)
137	key_released(x ^ KEY_RELEASE);	137	key_released(x ^ KEY_RELEASE);
138	else	138	else
139	active_read_key_pressed(x);	139	active_read_key_pressed(x);
140	}	140	}
141	}	141	}
142	return ch;	142	return ch;
143	}	143	}
144		144
145	/** Poll for key press and release events.	145	/** Poll for key press and release events.
146	*	146	*
147	* This function can be used to implement keyboard polling.	147	* This function can be used to implement keyboard polling.
148	*/	148	*/
149	void ns16550_poll(void)	149	void ns16550_poll(void)
150	{	150	{
151	uint8_t x;	151	uint8_t x;
152		152
153	while (ns16550_lsr_read() & LSR_DATA_READY) {	153	while (ns16550_lsr_read() & LSR_DATA_READY) {
154	x = ns16550_rbr_read();	154	x = ns16550_rbr_read();
155	if (x != IGNORE_CODE) {	155	if (x != IGNORE_CODE) {
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	irq_ownership_t ns16550_claim(void)	164	irq_ownership_t ns16550_claim(void)
165	{	165	{
166	/* TODO */	166	/* TODO */
167	return IRQ_ACCEPT;	167	return IRQ_ACCEPT;
168	}	168	}
169		169
170	void ns16550_irq_handler(irq_t irq, void arg, ...)	170	void ns16550_irq_handler(irq_t irq, void arg, ...)
171	{	171	{
172	panic("Not yet implemented.\n");	172	panic("Not yet implemented.\n");
173	}	173	}
174		174
175	/** @}	175	/** @}
176	*/	176	*/
177		177

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 1919 → 1920