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>
#ifndef ia64
#include <arch/drivers/kbd.h>
#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);
   
    sysinfo_set_item_val("kbd", NULL, true);
#ifndef ia64
    sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
#endif
    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);
 
#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;
        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 3646	Rev 3655
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	41	#ifndef ia64
42	#include <arch/drivers/kbd.h>	42	#include <arch/drivers/kbd.h>
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 inr Interrupt number.	112	* @param inr Interrupt number.
-		113	* @param cir Clear interrupt function.
112	* @param vaddr Virtual address of device's registers.	114	* @param cir_arg First argument to cir.
113	*/	115	*/
-		116	void
114	void ns16550_init(devno_t devno, inr_t inr, ioport_t port)	117	ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)
115	{	118	{
116	chardev_initialize("ns16550_kbd", &kbrd, &ops);	119	chardev_initialize("ns16550_kbd", &kbrd, &ops);
117	stdin = &kbrd;	120	stdin = &kbrd;
118		121
119	ns16550.devno = devno;	122	ns16550.devno = devno;
120	ns16550.io_port = port;	123	ns16550.io_port = port;
121		124
122	irq_initialize(&ns16550_irq);	125	irq_initialize(&ns16550_irq);
123	ns16550_irq.devno = devno;	126	ns16550_irq.devno = devno;
124	ns16550_irq.inr = inr;	127	ns16550_irq.inr = inr;
125	ns16550_irq.claim = ns16550_claim;	128	ns16550_irq.claim = ns16550_claim;
126	ns16550_irq.handler = ns16550_irq_handler;	129	ns16550_irq.handler = ns16550_irq_handler;
-		130	ns16550_irq.cir = cir;
-		131	ns16550_irq.cir_arg = cir_arg;
127	irq_register(&ns16550_irq);	132	irq_register(&ns16550_irq);
128		133
129	sysinfo_set_item_val("kbd", NULL, true);	134	sysinfo_set_item_val("kbd", NULL, true);
130	#ifndef ia64	135	#ifndef ia64
131	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);	136	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
132	#endif	137	#endif
133	sysinfo_set_item_val("kbd.devno", NULL, devno);	138	sysinfo_set_item_val("kbd.devno", NULL, devno);
134	sysinfo_set_item_val("kbd.inr", NULL, inr);	139	sysinfo_set_item_val("kbd.inr", NULL, inr);
135	sysinfo_set_item_val("kbd.address.virtual", NULL, port);	140	sysinfo_set_item_val("kbd.address.virtual", NULL, port);
136		141
137	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN	142	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN
138	/* Enable interrupts */	143	/* Enable interrupts */
139	ns16550_ier_write(&ns16550, IER_ERBFI);	144	ns16550_ier_write(&ns16550, IER_ERBFI);
140	ns16550_mcr_write(&ns16550, MCR_OUT2);	145	ns16550_mcr_write(&ns16550, MCR_OUT2);
141	#endif	146	#endif
142		147
143	#ifdef ia64	148	#ifdef ia64
144	uint8_t c;	149	uint8_t c;
145	c = ns16550_lcr_read(&ns16550);	150	c = ns16550_lcr_read(&ns16550);
146	ns16550_lcr_write(&ns16550, 0x80 \| c);	151	ns16550_lcr_write(&ns16550, 0x80 \| c);
147	ns16550_rbr_write(&ns16550, 0x0c);	152	ns16550_rbr_write(&ns16550, 0x0c);
148	ns16550_ier_write(&ns16550, 0x00);	153	ns16550_ier_write(&ns16550, 0x00);
149	ns16550_lcr_write(&ns16550, c);	154	ns16550_lcr_write(&ns16550, c);
150	#endif	155	#endif
151		156
152	ns16550_grab();	157	ns16550_grab();
153	}	158	}
154		159
155	/** Process ns16550 interrupt. */	160	/** Process ns16550 interrupt. */
156	void ns16550_interrupt(void)	161	void ns16550_interrupt(void)
157	{	162	{
158	ns16550_poll();	163	ns16550_poll();
159	}	164	}
160		165
161	/* Called from getc(). */	166	/* Called from getc(). */
162	void ns16550_resume(chardev_t *d)	167	void ns16550_resume(chardev_t *d)
163	{	168	{
164	}	169	}
165		170
166	/* Called from getc(). */	171	/* Called from getc(). */
167	void ns16550_suspend(chardev_t *d)	172	void ns16550_suspend(chardev_t *d)
168	{	173	{
169	}	174	}
170		175
171		176
172	char ns16550_key_read(chardev_t *d)	177	char ns16550_key_read(chardev_t *d)
173	{	178	{
174	char ch;	179	char ch;
175		180
176	while(!(ch = active_read_buff_read())) {	181	while(!(ch = active_read_buff_read())) {
177	uint8_t x;	182	uint8_t x;
178	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))	183	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
179	;	184	;
180	x = ns16550_rbr_read(&ns16550);	185	x = ns16550_rbr_read(&ns16550);
181	#ifndef ia64	186	#ifndef ia64
182	if (x != IGNORE_CODE) {	187	if (x != IGNORE_CODE) {
183	if (x & KEY_RELEASE)	188	if (x & KEY_RELEASE)
184	key_released(x ^ KEY_RELEASE);	189	key_released(x ^ KEY_RELEASE);
185	else	190	else
186	active_read_key_pressed(x);	191	active_read_key_pressed(x);
187	}	192	}
188	#else	193	#else
189	extern chardev_t kbrd;	194	extern chardev_t kbrd;
190	if(x != 0x0d) {	195	if(x != 0x0d) {
191	if(x == 0x7f)	196	if(x == 0x7f)
192	x = '\b';	197	x = '\b';
193	chardev_push_character(&kbrd, x);	198	chardev_push_character(&kbrd, x);
194	}	199	}
195	#endif	200	#endif
196		201
197	}	202	}
198	return ch;	203	return ch;
199	}	204	}
200		205
201	/** Poll for key press and release events.	206	/** Poll for key press and release events.
202	*	207	*
203	* This function can be used to implement keyboard polling.	208	* This function can be used to implement keyboard polling.
204	*/	209	*/
205	void ns16550_poll(void)	210	void ns16550_poll(void)
206	{	211	{
207	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN	212	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN
208	ipl_t ipl;	213	ipl_t ipl;
209		214
210	ipl = interrupts_disable();	215	ipl = interrupts_disable();
211	spinlock_lock(&ns16550_irq.lock);	216	spinlock_lock(&ns16550_irq.lock);
212		217
213	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	218	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
214	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {	219	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {
215	/*	220	/*
216	* Send IPC notification.	221	* Send IPC notification.
217	*/	222	*/
218	ipc_irq_send_notif(&ns16550_irq);	223	ipc_irq_send_notif(&ns16550_irq);
219	spinlock_unlock(&ns16550_irq.lock);	224	spinlock_unlock(&ns16550_irq.lock);
220	interrupts_restore(ipl);	225	interrupts_restore(ipl);
221	return;	226	return;
222	}	227	}
223	}	228	}
224		229
225	spinlock_unlock(&ns16550_irq.lock);	230	spinlock_unlock(&ns16550_irq.lock);
226	interrupts_restore(ipl);	231	interrupts_restore(ipl);
227	#endif	232	#endif
228		233
229	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	234	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
230	uint8_t x;	235	uint8_t x;
231		236
232	x = ns16550_rbr_read(&ns16550);	237	x = ns16550_rbr_read(&ns16550);
233	#ifndef ia64	238	#ifndef ia64
234	if (x != IGNORE_CODE) {	239	if (x != IGNORE_CODE) {
235	if (x & KEY_RELEASE)	240	if (x & KEY_RELEASE)
236	key_released(x ^ KEY_RELEASE);	241	key_released(x ^ KEY_RELEASE);
237	else	242	else
238	key_pressed(x);	243	key_pressed(x);
239	}	244	}
240	#else	245	#else
241	extern chardev_t kbrd;	246	extern chardev_t kbrd;
242	if(x != 0x0d) {	247	if(x != 0x0d) {
243	if (x == 0x7f)	248	if (x == 0x7f)
244	x = '\b';	249	x = '\b';
245	chardev_push_character(&kbrd, x);	250	chardev_push_character(&kbrd, x);
246	}	251	}
247	#endif	252	#endif
248		253
249	}	254	}
250	}	255	}
251		256
252	irq_ownership_t ns16550_claim(void)	257	irq_ownership_t ns16550_claim(void)
253	{	258	{
254	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);	259	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);
255	}	260	}
256		261
257	void ns16550_irq_handler(irq_t irq, void arg, ...)	262	void ns16550_irq_handler(irq_t irq, void arg, ...)
258	{	263	{
259	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)	264	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
260	ipc_irq_send_notif(irq);	265	ipc_irq_send_notif(irq);
261	else	266	else
262	ns16550_interrupt();	267	ns16550_interrupt();
263	}	268	}
264		269
265	/** @}	270	/** @}
266	*/	271	*/
267		272

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 3646 → 3655