WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/kbd/ns16550.c


/*
 * Copyright (C) 2001-2006 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
 
/** Structure representing the ns16550. */
static ns16550_t ns16550;
 
/** Structure for ns16550's IRQ. */
static irq_t ns16550_irq;
 
/*
 * 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.
 *
 * @param devno Device number.
 * @param inr Interrupt number.
 * @param vaddr Virtual address of device's registers.
 */
void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr)
{
    ns16550_grab();
    chardev_initialize("ns16550_kbd", &kbrd, &ops);
    stdin = &kbrd;
   
    ns16550.devno = devno;
    ns16550.reg = (uint8_t *) vaddr;
   
    irq_initialize(&ns16550_irq);
    ns16550_irq.devno = devno;
    ns16550_irq.inr = inr;
    ns16550_irq.claim = ns16550_claim;
    ns16550_irq.handler = ns16550_irq_handler;
    irq_register(&ns16550_irq);
   
    sysinfo_set_item_val("kbd", NULL, true);
    sysinfo_set_item_val("kbd.devno", NULL, devno);
    sysinfo_set_item_val("kbd.inr", NULL, inr);
    sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr);
   
    ns16550_ier_write(&ns16550, IER_ERBFI);     /* enable receiver interrupt */
   
    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
        (void) ns16550_rbr_read(&ns16550);
}
 
/** 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(&ns16550) & LSR_DATA_READY))
            ;
        x = ns16550_rbr_read(&ns16550);
        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(&ns16550) & LSR_DATA_READY) {
        x = ns16550_rbr_read(&ns16550);
        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 1920	Rev 1921
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2006 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 <ddi/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	/** Structure representing the ns16550. */
-		56	static ns16550_t ns16550;
-		57
-		58	/** Structure for ns16550's IRQ. */
-		59	static irq_t ns16550_irq;
-		60
55	/*	61	/*
56	* These codes read from ns16550 data register are silently ignored.	62	* These codes read from ns16550 data register are silently ignored.
57	*/	63	*/
58	#define IGNORE_CODE 0x7f /* all keys up */	64	#define IGNORE_CODE 0x7f /* all keys up */
59		65
60	static void ns16550_suspend(chardev_t *);	66	static void ns16550_suspend(chardev_t *);
61	static void ns16550_resume(chardev_t *);	67	static void ns16550_resume(chardev_t *);
62		68
63	static chardev_operations_t ops = {	69	static chardev_operations_t ops = {
64	.suspend = ns16550_suspend,	70	.suspend = ns16550_suspend,
65	.resume = ns16550_resume,	71	.resume = ns16550_resume,
66	.read = ns16550_key_read	72	.read = ns16550_key_read
67	};	73	};
68		74
69	void ns16550_interrupt(int n, istate_t *istate);	75	void ns16550_interrupt(int n, istate_t *istate);
70	void ns16550_wait(void);	76	void ns16550_wait(void);
71		77
72	/** Initialize keyboard and service interrupts using kernel routine */	78	/** Initialize keyboard and service interrupts using kernel routine */
73	void ns16550_grab(void)	79	void ns16550_grab(void)
74	{	80	{
75	/* TODO */	81	/* TODO */
76	}	82	}
77		83
78	/** Resume the former interrupt vector */	84	/** Resume the former interrupt vector */
79	void ns16550_release(void)	85	void ns16550_release(void)
80	{	86	{
81	/* TODO */	87	/* TODO */
82	}	88	}
83		89
84	/** Initialize ns16550. */	90	/** Initialize ns16550.
-		91	*
-		92	* @param devno Device number.
-		93	* @param inr Interrupt number.
-		94	* @param vaddr Virtual address of device's registers.
-		95	*/
85	void ns16550_init(void)	96	void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr)
86	{	97	{
87	ns16550_grab();	98	ns16550_grab();
88	chardev_initialize("ns16550_kbd", &kbrd, &ops);	99	chardev_initialize("ns16550_kbd", &kbrd, &ops);
89	stdin = &kbrd;	100	stdin = &kbrd;
90		101
-		102	ns16550.devno = devno;
-		103	ns16550.reg = (uint8_t *) vaddr;
-		104
-		105	irq_initialize(&ns16550_irq);
-		106	ns16550_irq.devno = devno;
-		107	ns16550_irq.inr = inr;
-		108	ns16550_irq.claim = ns16550_claim;
-		109	ns16550_irq.handler = ns16550_irq_handler;
-		110	irq_register(&ns16550_irq);
-		111
91	sysinfo_set_item_val("kbd", NULL, true);	112	sysinfo_set_item_val("kbd", NULL, true);
-		113	sysinfo_set_item_val("kbd.devno", NULL, devno);
92	sysinfo_set_item_val("kbd.irq", NULL, 0);	114	sysinfo_set_item_val("kbd.inr", NULL, inr);
93	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) kbd_virt_address);	115	sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr);
94		116
95	ns16550_ier_write(IER_ERBFI); /* enable receiver interrupt */	117	ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */
96		118
97	while (ns16550_lsr_read() & LSR_DATA_READY)	119	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
98	(void) ns16550_rbr_read();	120	(void) ns16550_rbr_read(&ns16550);
99	}	121	}
100		122
101	/** Process ns16550 interrupt.	123	/** Process ns16550 interrupt.
102	*	124	*
103	* @param n Interrupt vector.	125	* @param n Interrupt vector.
104	* @param istate Interrupted state.	126	* @param istate Interrupted state.
105	*/	127	*/
106	void ns16550_interrupt(int n, istate_t *istate)	128	void ns16550_interrupt(int n, istate_t *istate)
107	{	129	{
108	/* TODO */	130	/* TODO */
109	}	131	}
110		132
111	/** Wait until the controller reads its data. */	133	/** Wait until the controller reads its data. */
112	void ns16550_wait(void)	134	void ns16550_wait(void)
113	{	135	{
114	}	136	}
115		137
116	/* Called from getc(). */	138	/* Called from getc(). */
117	void ns16550_resume(chardev_t *d)	139	void ns16550_resume(chardev_t *d)
118	{	140	{
119	}	141	}
120		142
121	/* Called from getc(). */	143	/* Called from getc(). */
122	void ns16550_suspend(chardev_t *d)	144	void ns16550_suspend(chardev_t *d)
123	{	145	{
124	}	146	}
125		147
126	char ns16550_key_read(chardev_t *d)	148	char ns16550_key_read(chardev_t *d)
127	{	149	{
128	char ch;	150	char ch;
129		151
130	while(!(ch = active_read_buff_read())) {	152	while(!(ch = active_read_buff_read())) {
131	uint8_t x;	153	uint8_t x;
132	while (!(ns16550_lsr_read() & LSR_DATA_READY))	154	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
133	;	155	;
134	x = ns16550_rbr_read();	156	x = ns16550_rbr_read(&ns16550);
135	if (x != IGNORE_CODE) {	157	if (x != IGNORE_CODE) {
136	if (x & KEY_RELEASE)	158	if (x & KEY_RELEASE)
137	key_released(x ^ KEY_RELEASE);	159	key_released(x ^ KEY_RELEASE);
138	else	160	else
139	active_read_key_pressed(x);	161	active_read_key_pressed(x);
140	}	162	}
141	}	163	}
142	return ch;	164	return ch;
143	}	165	}
144		166
145	/** Poll for key press and release events.	167	/** Poll for key press and release events.
146	*	168	*
147	* This function can be used to implement keyboard polling.	169	* This function can be used to implement keyboard polling.
148	*/	170	*/
149	void ns16550_poll(void)	171	void ns16550_poll(void)
150	{	172	{
151	uint8_t x;	173	uint8_t x;
152		174
153	while (ns16550_lsr_read() & LSR_DATA_READY) {	175	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
154	x = ns16550_rbr_read();	176	x = ns16550_rbr_read(&ns16550);
155	if (x != IGNORE_CODE) {	177	if (x != IGNORE_CODE) {
156	if (x & KEY_RELEASE)	178	if (x & KEY_RELEASE)
157	key_released(x ^ KEY_RELEASE);	179	key_released(x ^ KEY_RELEASE);
158	else	180	else
159	key_pressed(x);	181	key_pressed(x);
160	}	182	}
161	}	183	}
162	}	184	}
163		185
164	irq_ownership_t ns16550_claim(void)	186	irq_ownership_t ns16550_claim(void)
165	{	187	{
166	/* TODO */	188	/* TODO */
167	return IRQ_ACCEPT;	189	return IRQ_ACCEPT;
168	}	190	}
169		191
170	void ns16550_irq_handler(irq_t irq, void arg, ...)	192	void ns16550_irq_handler(irq_t irq, void arg, ...)
171	{	193	{
172	panic("Not yet implemented.\n");	194	panic("Not yet implemented.\n");
173	}	195	}
174		196
175	/** @}	197	/** @}
176	*/	198	*/
177		199

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 1920 → 1921