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/kbd.h>
#ifndef ia64
#include <arch/drivers/ns16550.h>
#endif
#include <ddi/irq.h>
#include <ipc/irq.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch.h>
#include <console/chardev.h>
#include <console/console.h>
#include <interrupt.h>
#include <arch/interrupt.h>
#include <sysinfo/sysinfo.h>
#include <synch/spinlock.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(void);
 
/** Initialize keyboard and service interrupts using kernel routine */
void ns16550_grab(void)
{
    ipl_t ipl = interrupts_disable();
 
    ns16550_ier_write(&ns16550, IER_ERBFI);     /* enable receiver interrupt */
   
    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
        (void) ns16550_rbr_read(&ns16550);
 
    spinlock_lock(&ns16550_irq.lock);
    ns16550_irq.notif_cfg.notify = false;
    spinlock_unlock(&ns16550_irq.lock);
    interrupts_restore(ipl);
}
 
/** Resume the former interrupt vector */
void ns16550_release(void)
{
    ipl_t ipl = interrupts_disable();
    spinlock_lock(&ns16550_irq.lock);
    if (ns16550_irq.notif_cfg.answerbox)
        ns16550_irq.notif_cfg.notify = true;
    spinlock_unlock(&ns16550_irq.lock);
    interrupts_restore(ipl);
}
 
/** Initialize ns16550.
 *
 * @param devno     Device number.
 * @param port      Virtual/IO address of device's registers.
 * @param inr       Interrupt number.
 * @param cir       Clear interrupt function.
 * @param cir_arg   First argument to cir.
 */
void
ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)
{
    chardev_initialize("ns16550_kbd", &kbrd, &ops);
    stdin = &kbrd;
   
    ns16550.devno = devno;
    ns16550.io_port = port;
   
    irq_initialize(&ns16550_irq);
    ns16550_irq.devno = devno;
    ns16550_irq.inr = inr;
    ns16550_irq.claim = ns16550_claim;
    ns16550_irq.handler = ns16550_irq_handler;
    ns16550_irq.cir = cir;
    ns16550_irq.cir_arg = cir_arg;
    irq_register(&ns16550_irq);
 
 
    while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
        ns16550_rbr_read(&ns16550);
 
   
    sysinfo_set_item_val("kbd", NULL, true);
 
    sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
 
    sysinfo_set_item_val("kbd.devno", NULL, devno);
    sysinfo_set_item_val("kbd.inr", NULL, inr);
    sysinfo_set_item_val("kbd.address.virtual", NULL, port);
    sysinfo_set_item_val("kbd.port", NULL, port);
 
#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN
    /* Enable interrupts */
        ns16550_ier_write(&ns16550, IER_ERBFI);
    ns16550_mcr_write(&ns16550, MCR_OUT2);
#endif
 
#ifdef ia64
        uint8_t c;
        // This switches rbr & ier to mode when accept baudrate constant
        c = ns16550_lcr_read(&ns16550);
        ns16550_lcr_write(&ns16550, 0x80 | c);
        ns16550_rbr_write(&ns16550, 0x0c);
        ns16550_ier_write(&ns16550, 0x00);
        ns16550_lcr_write(&ns16550, c);
#endif
   
    ns16550_grab();
}
 
/** Process ns16550 interrupt. */
void ns16550_interrupt(void)
{
    ns16550_poll();
}
 
/* 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);
#ifndef ia64
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                active_read_key_pressed(x);
        }
#else
        extern chardev_t kbrd;
        if(x != 0x0d) {
            if(x == 0x7f)
                x = '\b';
             chardev_push_character(&kbrd, x);
        }    
#endif      
 
    }
    return ch;
}
 
/** Poll for key press and release events.
 *
 * This function can be used to implement keyboard polling.
 */
void ns16550_poll(void)
{
#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN 
    ipl_t ipl;
 
    ipl = interrupts_disable();
    spinlock_lock(&ns16550_irq.lock);
 
    if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
        if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {
            /*
             * Send IPC notification.
             */
            ipc_irq_send_notif(&ns16550_irq);
            spinlock_unlock(&ns16550_irq.lock);
            interrupts_restore(ipl);
            return;
        }
    }
 
    spinlock_unlock(&ns16550_irq.lock);
    interrupts_restore(ipl);
#endif
 
    while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
        uint8_t x;
       
        x = ns16550_rbr_read(&ns16550);
#ifndef ia64
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
#else
        extern chardev_t kbrd;
        if(x != 0x0d) {
            if (x == 0x7f)
                x = '\b';
            chardev_push_character(&kbrd, x);
        }    
#endif      
 
    }
}
 
irq_ownership_t ns16550_claim(void)
{
    return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);
}
 
void ns16550_irq_handler(irq_t *irq, void *arg, ...)
{
    if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
        ipc_irq_send_notif(irq);
    else
        ns16550_interrupt();
}
 
/** @}
 */
 

Rev 3655	Rev 3657
1	/*	1	/*
2	* Copyright (c) 2001-2006 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	#ifndef ia64	-
42	#include <arch/drivers/kbd.h>	41	#include <arch/drivers/kbd.h>
-		42	#ifndef ia64
43	#include <arch/drivers/ns16550.h>	43	#include <arch/drivers/ns16550.h>
44	#endif	44	#endif
45	#include <ddi/irq.h>	45	#include <ddi/irq.h>
46	#include <ipc/irq.h>	46	#include <ipc/irq.h>
47	#include <cpu.h>	47	#include <cpu.h>
48	#include <arch/asm.h>	48	#include <arch/asm.h>
49	#include <arch.h>	49	#include <arch.h>
50	#include <console/chardev.h>	50	#include <console/chardev.h>
51	#include <console/console.h>	51	#include <console/console.h>
52	#include <interrupt.h>	52	#include <interrupt.h>
53	#include <arch/interrupt.h>	53	#include <arch/interrupt.h>
54	#include <sysinfo/sysinfo.h>	54	#include <sysinfo/sysinfo.h>
55	#include <synch/spinlock.h>	55	#include <synch/spinlock.h>
56		56
57	#define LSR_DATA_READY 0x01	57	#define LSR_DATA_READY 0x01
58		58
59	/** Structure representing the ns16550. */	59	/** Structure representing the ns16550. */
60	static ns16550_t ns16550;	60	static ns16550_t ns16550;
61		61
62	/** Structure for ns16550's IRQ. */	62	/** Structure for ns16550's IRQ. */
63	static irq_t ns16550_irq;	63	static irq_t ns16550_irq;
64		64
65	/*	65	/*
66	* These codes read from ns16550 data register are silently ignored.	66	* These codes read from ns16550 data register are silently ignored.
67	*/	67	*/
68	#define IGNORE_CODE 0x7f /* all keys up */	68	#define IGNORE_CODE 0x7f /* all keys up */
69		69
70	static void ns16550_suspend(chardev_t *);	70	static void ns16550_suspend(chardev_t *);
71	static void ns16550_resume(chardev_t *);	71	static void ns16550_resume(chardev_t *);
72		72
73	static chardev_operations_t ops = {	73	static chardev_operations_t ops = {
74	.suspend = ns16550_suspend,	74	.suspend = ns16550_suspend,
75	.resume = ns16550_resume,	75	.resume = ns16550_resume,
76	.read = ns16550_key_read	76	.read = ns16550_key_read
77	};	77	};
78		78
79	void ns16550_interrupt(void);	79	void ns16550_interrupt(void);
80		80
81	/** Initialize keyboard and service interrupts using kernel routine */	81	/** Initialize keyboard and service interrupts using kernel routine */
82	void ns16550_grab(void)	82	void ns16550_grab(void)
83	{	83	{
84	ipl_t ipl = interrupts_disable();	84	ipl_t ipl = interrupts_disable();
85		85
86	ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */	86	ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */
87		87
88	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)	88	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
89	(void) ns16550_rbr_read(&ns16550);	89	(void) ns16550_rbr_read(&ns16550);
90		90
91	spinlock_lock(&ns16550_irq.lock);	91	spinlock_lock(&ns16550_irq.lock);
92	ns16550_irq.notif_cfg.notify = false;	92	ns16550_irq.notif_cfg.notify = false;
93	spinlock_unlock(&ns16550_irq.lock);	93	spinlock_unlock(&ns16550_irq.lock);
94	interrupts_restore(ipl);	94	interrupts_restore(ipl);
95	}	95	}
96		96
97	/** Resume the former interrupt vector */	97	/** Resume the former interrupt vector */
98	void ns16550_release(void)	98	void ns16550_release(void)
99	{	99	{
100	ipl_t ipl = interrupts_disable();	100	ipl_t ipl = interrupts_disable();
101	spinlock_lock(&ns16550_irq.lock);	101	spinlock_lock(&ns16550_irq.lock);
102	if (ns16550_irq.notif_cfg.answerbox)	102	if (ns16550_irq.notif_cfg.answerbox)
103	ns16550_irq.notif_cfg.notify = true;	103	ns16550_irq.notif_cfg.notify = true;
104	spinlock_unlock(&ns16550_irq.lock);	104	spinlock_unlock(&ns16550_irq.lock);
105	interrupts_restore(ipl);	105	interrupts_restore(ipl);
106	}	106	}
107		107
108	/** Initialize ns16550.	108	/** Initialize ns16550.
109	*	109	*
110	* @param devno Device number.	110	* @param devno Device number.
111	* @param port Virtual/IO address of device's registers.	111	* @param port Virtual/IO address of device's registers.
112	* @param inr Interrupt number.	112	* @param inr Interrupt number.
113	* @param cir Clear interrupt function.	113	* @param cir Clear interrupt function.
114	* @param cir_arg First argument to cir.	114	* @param cir_arg First argument to cir.
115	*/	115	*/
116	void	116	void
117	ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)	117	ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)
118	{	118	{
119	chardev_initialize("ns16550_kbd", &kbrd, &ops);	119	chardev_initialize("ns16550_kbd", &kbrd, &ops);
120	stdin = &kbrd;	120	stdin = &kbrd;
121		121
122	ns16550.devno = devno;	122	ns16550.devno = devno;
123	ns16550.io_port = port;	123	ns16550.io_port = port;
124		124
125	irq_initialize(&ns16550_irq);	125	irq_initialize(&ns16550_irq);
126	ns16550_irq.devno = devno;	126	ns16550_irq.devno = devno;
127	ns16550_irq.inr = inr;	127	ns16550_irq.inr = inr;
128	ns16550_irq.claim = ns16550_claim;	128	ns16550_irq.claim = ns16550_claim;
129	ns16550_irq.handler = ns16550_irq_handler;	129	ns16550_irq.handler = ns16550_irq_handler;
130	ns16550_irq.cir = cir;	130	ns16550_irq.cir = cir;
131	ns16550_irq.cir_arg = cir_arg;	131	ns16550_irq.cir_arg = cir_arg;
132	irq_register(&ns16550_irq);	132	irq_register(&ns16550_irq);
-		133
-		134
-		135	while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
-		136	ns16550_rbr_read(&ns16550);
-		137
133		138
134	sysinfo_set_item_val("kbd", NULL, true);	139	sysinfo_set_item_val("kbd", NULL, true);
135	#ifndef ia64	-
136	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);	140	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
137	#endif	-
138	sysinfo_set_item_val("kbd.devno", NULL, devno);	141	sysinfo_set_item_val("kbd.devno", NULL, devno);
139	sysinfo_set_item_val("kbd.inr", NULL, inr);	142	sysinfo_set_item_val("kbd.inr", NULL, inr);
140	sysinfo_set_item_val("kbd.address.virtual", NULL, port);	143	sysinfo_set_item_val("kbd.address.virtual", NULL, port);
-		144	sysinfo_set_item_val("kbd.port", NULL, port);
141		145
142	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN	146	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN
143	/* Enable interrupts */	147	/* Enable interrupts */
144	ns16550_ier_write(&ns16550, IER_ERBFI);	148	ns16550_ier_write(&ns16550, IER_ERBFI);
145	ns16550_mcr_write(&ns16550, MCR_OUT2);	149	ns16550_mcr_write(&ns16550, MCR_OUT2);
146	#endif	150	#endif
147		151
148	#ifdef ia64	152	#ifdef ia64
149	uint8_t c;	153	uint8_t c;
-		154	// This switches rbr & ier to mode when accept baudrate constant
150	c = ns16550_lcr_read(&ns16550);	155	c = ns16550_lcr_read(&ns16550);
151	ns16550_lcr_write(&ns16550, 0x80 \| c);	156	ns16550_lcr_write(&ns16550, 0x80 \| c);
152	ns16550_rbr_write(&ns16550, 0x0c);	157	ns16550_rbr_write(&ns16550, 0x0c);
153	ns16550_ier_write(&ns16550, 0x00);	158	ns16550_ier_write(&ns16550, 0x00);
154	ns16550_lcr_write(&ns16550, c);	159	ns16550_lcr_write(&ns16550, c);
155	#endif	160	#endif
156		161
157	ns16550_grab();	162	ns16550_grab();
158	}	163	}
159		164
160	/** Process ns16550 interrupt. */	165	/** Process ns16550 interrupt. */
161	void ns16550_interrupt(void)	166	void ns16550_interrupt(void)
162	{	167	{
163	ns16550_poll();	168	ns16550_poll();
164	}	169	}
165		170
166	/* Called from getc(). */	171	/* Called from getc(). */
167	void ns16550_resume(chardev_t *d)	172	void ns16550_resume(chardev_t *d)
168	{	173	{
169	}	174	}
170		175
171	/* Called from getc(). */	176	/* Called from getc(). */
172	void ns16550_suspend(chardev_t *d)	177	void ns16550_suspend(chardev_t *d)
173	{	178	{
174	}	179	}
175		180
176		181
177	char ns16550_key_read(chardev_t *d)	182	char ns16550_key_read(chardev_t *d)
178	{	183	{
179	char ch;	184	char ch;
180		185
181	while(!(ch = active_read_buff_read())) {	186	while(!(ch = active_read_buff_read())) {
182	uint8_t x;	187	uint8_t x;
183	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))	188	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
184	;	189	;
185	x = ns16550_rbr_read(&ns16550);	190	x = ns16550_rbr_read(&ns16550);
186	#ifndef ia64	191	#ifndef ia64
187	if (x != IGNORE_CODE) {	192	if (x != IGNORE_CODE) {
188	if (x & KEY_RELEASE)	193	if (x & KEY_RELEASE)
189	key_released(x ^ KEY_RELEASE);	194	key_released(x ^ KEY_RELEASE);
190	else	195	else
191	active_read_key_pressed(x);	196	active_read_key_pressed(x);
192	}	197	}
193	#else	198	#else
194	extern chardev_t kbrd;	199	extern chardev_t kbrd;
195	if(x != 0x0d) {	200	if(x != 0x0d) {
196	if(x == 0x7f)	201	if(x == 0x7f)
197	x = '\b';	202	x = '\b';
198	chardev_push_character(&kbrd, x);	203	chardev_push_character(&kbrd, x);
199	}	204	}
200	#endif	205	#endif
201		206
202	}	207	}
203	return ch;	208	return ch;
204	}	209	}
205		210
206	/** Poll for key press and release events.	211	/** Poll for key press and release events.
207	*	212	*
208	* This function can be used to implement keyboard polling.	213	* This function can be used to implement keyboard polling.
209	*/	214	*/
210	void ns16550_poll(void)	215	void ns16550_poll(void)
211	{	216	{
212	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN	217	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN
213	ipl_t ipl;	218	ipl_t ipl;
214		219
215	ipl = interrupts_disable();	220	ipl = interrupts_disable();
216	spinlock_lock(&ns16550_irq.lock);	221	spinlock_lock(&ns16550_irq.lock);
217		222
218	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	223	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
219	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {	224	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {
220	/*	225	/*
221	* Send IPC notification.	226	* Send IPC notification.
222	*/	227	*/
223	ipc_irq_send_notif(&ns16550_irq);	228	ipc_irq_send_notif(&ns16550_irq);
224	spinlock_unlock(&ns16550_irq.lock);	229	spinlock_unlock(&ns16550_irq.lock);
225	interrupts_restore(ipl);	230	interrupts_restore(ipl);
226	return;	231	return;
227	}	232	}
228	}	233	}
229		234
230	spinlock_unlock(&ns16550_irq.lock);	235	spinlock_unlock(&ns16550_irq.lock);
231	interrupts_restore(ipl);	236	interrupts_restore(ipl);
232	#endif	237	#endif
233		238
234	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	239	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
235	uint8_t x;	240	uint8_t x;
236		241
237	x = ns16550_rbr_read(&ns16550);	242	x = ns16550_rbr_read(&ns16550);
238	#ifndef ia64	243	#ifndef ia64
239	if (x != IGNORE_CODE) {	244	if (x != IGNORE_CODE) {
240	if (x & KEY_RELEASE)	245	if (x & KEY_RELEASE)
241	key_released(x ^ KEY_RELEASE);	246	key_released(x ^ KEY_RELEASE);
242	else	247	else
243	key_pressed(x);	248	key_pressed(x);
244	}	249	}
245	#else	250	#else
246	extern chardev_t kbrd;	251	extern chardev_t kbrd;
247	if(x != 0x0d) {	252	if(x != 0x0d) {
248	if (x == 0x7f)	253	if (x == 0x7f)
249	x = '\b';	254	x = '\b';
250	chardev_push_character(&kbrd, x);	255	chardev_push_character(&kbrd, x);
251	}	256	}
252	#endif	257	#endif
253		258
254	}	259	}
255	}	260	}
256		261
257	irq_ownership_t ns16550_claim(void)	262	irq_ownership_t ns16550_claim(void)
258	{	263	{
259	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);	264	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);
260	}	265	}
261		266
262	void ns16550_irq_handler(irq_t irq, void arg, ...)	267	void ns16550_irq_handler(irq_t irq, void arg, ...)
263	{	268	{
264	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)	269	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
265	ipc_irq_send_notif(irq);	270	ipc_irq_send_notif(irq);
266	else	271	else
267	ns16550_interrupt();	272	ns16550_interrupt();
268	}	273	}
269		274
270	/** @}	275	/** @}
271	*/	276	*/
272		277

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 3655 → 3657