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>
 
 
 
#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
   
 
    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);
 
   
    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);
       
        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)
{
#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);
       
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
 
 
 
 
 
 
 
 
 
    }
}
 
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 3657	Rev 3877
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	#include <arch/drivers/kbd.h>	41	#include <arch/drivers/kbd.h>
42	#ifndef ia64	-
43	#include <arch/drivers/ns16550.h>	-
44	#endif	-
45	#include <ddi/irq.h>	42	#include <ddi/irq.h>
46	#include <ipc/irq.h>	43	#include <ipc/irq.h>
47	#include <cpu.h>	44	#include <cpu.h>
48	#include <arch/asm.h>	45	#include <arch/asm.h>
49	#include <arch.h>	46	#include <arch.h>
50	#include <console/chardev.h>	47	#include <console/chardev.h>
51	#include <console/console.h>	48	#include <console/console.h>
52	#include <interrupt.h>	49	#include <interrupt.h>
53	#include <arch/interrupt.h>	50	#include <arch/interrupt.h>
54	#include <sysinfo/sysinfo.h>	51	#include <sysinfo/sysinfo.h>
55	#include <synch/spinlock.h>	52	#include <synch/spinlock.h>
56		53
57	#define LSR_DATA_READY 0x01	54	#define LSR_DATA_READY 0x01
58		55
59	/** Structure representing the ns16550. */	56	/** Structure representing the ns16550. */
60	static ns16550_t ns16550;	57	static ns16550_t ns16550;
61		58
62	/** Structure for ns16550's IRQ. */	59	/** Structure for ns16550's IRQ. */
63	static irq_t ns16550_irq;	60	static irq_t ns16550_irq;
64		61
65	/*	62	/*
66	* These codes read from ns16550 data register are silently ignored.	63	* These codes read from ns16550 data register are silently ignored.
67	*/	64	*/
68	#define IGNORE_CODE 0x7f /* all keys up */	65	#define IGNORE_CODE 0x7f /* all keys up */
69		66
70	static void ns16550_suspend(chardev_t *);	67	static void ns16550_suspend(chardev_t *);
71	static void ns16550_resume(chardev_t *);	68	static void ns16550_resume(chardev_t *);
72		69
73	static chardev_operations_t ops = {	70	static chardev_operations_t ops = {
74	.suspend = ns16550_suspend,	71	.suspend = ns16550_suspend,
75	.resume = ns16550_resume,	72	.resume = ns16550_resume,
76	.read = ns16550_key_read	73	.read = ns16550_key_read
77	};	74	};
78		75
79	void ns16550_interrupt(void);	76	void ns16550_interrupt(void);
80		77
81	/** Initialize keyboard and service interrupts using kernel routine */	78	/** Initialize keyboard and service interrupts using kernel routine */
82	void ns16550_grab(void)	79	void ns16550_grab(void)
83	{	80	{
84	ipl_t ipl = interrupts_disable();	81	ipl_t ipl = interrupts_disable();
85		82
86	ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */	83	ns16550_ier_write(&ns16550, IER_ERBFI); /* enable receiver interrupt */
87		84
88	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)	85	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY)
89	(void) ns16550_rbr_read(&ns16550);	86	(void) ns16550_rbr_read(&ns16550);
90		87
91	spinlock_lock(&ns16550_irq.lock);	88	spinlock_lock(&ns16550_irq.lock);
92	ns16550_irq.notif_cfg.notify = false;	89	ns16550_irq.notif_cfg.notify = false;
93	spinlock_unlock(&ns16550_irq.lock);	90	spinlock_unlock(&ns16550_irq.lock);
94	interrupts_restore(ipl);	91	interrupts_restore(ipl);
95	}	92	}
96		93
97	/** Resume the former interrupt vector */	94	/** Resume the former interrupt vector */
98	void ns16550_release(void)	95	void ns16550_release(void)
99	{	96	{
100	ipl_t ipl = interrupts_disable();	97	ipl_t ipl = interrupts_disable();
101	spinlock_lock(&ns16550_irq.lock);	98	spinlock_lock(&ns16550_irq.lock);
102	if (ns16550_irq.notif_cfg.answerbox)	99	if (ns16550_irq.notif_cfg.answerbox)
103	ns16550_irq.notif_cfg.notify = true;	100	ns16550_irq.notif_cfg.notify = true;
104	spinlock_unlock(&ns16550_irq.lock);	101	spinlock_unlock(&ns16550_irq.lock);
105	interrupts_restore(ipl);	102	interrupts_restore(ipl);
106	}	103	}
107		104
108	/** Initialize ns16550.	105	/** Initialize ns16550.
109	*	106	*
110	* @param devno Device number.	107	* @param devno Device number.
111	* @param port Virtual/IO address of device's registers.	108	* @param port Virtual/IO address of device's registers.
112	* @param inr Interrupt number.	109	* @param inr Interrupt number.
113	* @param cir Clear interrupt function.	110	* @param cir Clear interrupt function.
114	* @param cir_arg First argument to cir.	111	* @param cir_arg First argument to cir.
115	*/	112	*/
116	void	113	void
117	ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)	114	ns16550_init(devno_t devno, ioport_t port, inr_t inr, cir_t cir, void *cir_arg)
118	{	115	{
119	chardev_initialize("ns16550_kbd", &kbrd, &ops);	116	chardev_initialize("ns16550_kbd", &kbrd, &ops);
120	stdin = &kbrd;	117	stdin = &kbrd;
121		118
122	ns16550.devno = devno;	119	ns16550.devno = devno;
123	ns16550.io_port = port;	120	ns16550.io_port = port;
124		121
125	irq_initialize(&ns16550_irq);	122	irq_initialize(&ns16550_irq);
126	ns16550_irq.devno = devno;	123	ns16550_irq.devno = devno;
127	ns16550_irq.inr = inr;	124	ns16550_irq.inr = inr;
128	ns16550_irq.claim = ns16550_claim;	125	ns16550_irq.claim = ns16550_claim;
129	ns16550_irq.handler = ns16550_irq_handler;	126	ns16550_irq.handler = ns16550_irq_handler;
130	ns16550_irq.cir = cir;	127	ns16550_irq.cir = cir;
131	ns16550_irq.cir_arg = cir_arg;	128	ns16550_irq.cir_arg = cir_arg;
132	irq_register(&ns16550_irq);	129	irq_register(&ns16550_irq);
133		130
134		-
135	while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY))	131	while ((ns16550_lsr_read(&ns16550) & LSR_DATA_READY))
136	ns16550_rbr_read(&ns16550);	132	ns16550_rbr_read(&ns16550);
137		133
138		-
139	sysinfo_set_item_val("kbd", NULL, true);	134	sysinfo_set_item_val("kbd", NULL, true);
140	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);	135	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);
141	sysinfo_set_item_val("kbd.devno", NULL, devno);	136	sysinfo_set_item_val("kbd.devno", NULL, devno);
142	sysinfo_set_item_val("kbd.inr", NULL, inr);	137	sysinfo_set_item_val("kbd.inr", NULL, inr);
143	sysinfo_set_item_val("kbd.address.virtual", NULL, port);	138	sysinfo_set_item_val("kbd.address.virtual", NULL, port);
144	sysinfo_set_item_val("kbd.port", NULL, port);	139	sysinfo_set_item_val("kbd.port", NULL, port);
145		140
146	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN	141	#ifdef CONFIG_NS16550_INTERRUPT_DRIVEN
147	/* Enable interrupts */	142	/* Enable interrupts */
148	ns16550_ier_write(&ns16550, IER_ERBFI);	143	ns16550_ier_write(&ns16550, IER_ERBFI);
149	ns16550_mcr_write(&ns16550, MCR_OUT2);	144	ns16550_mcr_write(&ns16550, MCR_OUT2);
150	#endif	145	#endif
151		146
152	#ifdef ia64	-
153	uint8_t c;	147	uint8_t c;
154	// This switches rbr & ier to mode when accept baudrate constant	148	// This switches rbr & ier to mode when accept baudrate constant
155	c = ns16550_lcr_read(&ns16550);	149	c = ns16550_lcr_read(&ns16550);
156	ns16550_lcr_write(&ns16550, 0x80 \| c);	150	ns16550_lcr_write(&ns16550, 0x80 \| c);
157	ns16550_rbr_write(&ns16550, 0x0c);	151	ns16550_rbr_write(&ns16550, 0x0c);
158	ns16550_ier_write(&ns16550, 0x00);	152	ns16550_ier_write(&ns16550, 0x00);
159	ns16550_lcr_write(&ns16550, c);	153	ns16550_lcr_write(&ns16550, c);
160	#endif	-
161		154
162	ns16550_grab();	155	ns16550_grab();
163	}	156	}
164		157
165	/** Process ns16550 interrupt. */	158	/** Process ns16550 interrupt. */
166	void ns16550_interrupt(void)	159	void ns16550_interrupt(void)
167	{	160	{
168	ns16550_poll();	161	ns16550_poll();
169	}	162	}
170		163
171	/* Called from getc(). */	164	/* Called from getc(). */
172	void ns16550_resume(chardev_t *d)	165	void ns16550_resume(chardev_t *d)
173	{	166	{
174	}	167	}
175		168
176	/* Called from getc(). */	169	/* Called from getc(). */
177	void ns16550_suspend(chardev_t *d)	170	void ns16550_suspend(chardev_t *d)
178	{	171	{
179	}	172	}
180		173
181		174
182	char ns16550_key_read(chardev_t *d)	175	char ns16550_key_read(chardev_t *d)
183	{	176	{
184	char ch;	177	char ch;
185		178
186	while(!(ch = active_read_buff_read())) {	179	while(!(ch = active_read_buff_read())) {
187	uint8_t x;	180	uint8_t x;
188	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY))	181	while (!(ns16550_lsr_read(&ns16550) & LSR_DATA_READY));
189	;	182
190	x = ns16550_rbr_read(&ns16550);	183	x = ns16550_rbr_read(&ns16550);
191	#ifndef ia64	184
192	if (x != IGNORE_CODE) {	185	if (x != IGNORE_CODE) {
193	if (x & KEY_RELEASE)	186	if (x & KEY_RELEASE)
194	key_released(x ^ KEY_RELEASE);	187	key_released(x ^ KEY_RELEASE);
195	else	188	else
196	active_read_key_pressed(x);	189	active_read_key_pressed(x);
197	}	190	}
198	#else	-
199	extern chardev_t kbrd;	-
200	if(x != 0x0d) {	-
201	if(x == 0x7f)	-
202	x = '\b';	-
203	chardev_push_character(&kbrd, x);	-
204	}	-
205	#endif	-
206		-
207	}	191	}
208	return ch;	192	return ch;
209	}	193	}
210		194
211	/** Poll for key press and release events.	195	/** Poll for key press and release events.
212	*	196	*
213	* This function can be used to implement keyboard polling.	197	* This function can be used to implement keyboard polling.
214	*/	198	*/
215	void ns16550_poll(void)	199	void ns16550_poll(void)
216	{	200	{
217	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN	201	#ifndef CONFIG_NS16550_INTERRUPT_DRIVEN
218	ipl_t ipl;	202	ipl_t ipl;
219		203
220	ipl = interrupts_disable();	204	ipl = interrupts_disable();
221	spinlock_lock(&ns16550_irq.lock);	205	spinlock_lock(&ns16550_irq.lock);
222		206
223	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	207	if (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
224	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {	208	if (ns16550_irq.notif_cfg.notify && ns16550_irq.notif_cfg.answerbox) {
225	/*	209	/*
226	* Send IPC notification.	210	* Send IPC notification.
227	*/	211	*/
228	ipc_irq_send_notif(&ns16550_irq);	212	ipc_irq_send_notif(&ns16550_irq);
229	spinlock_unlock(&ns16550_irq.lock);	213	spinlock_unlock(&ns16550_irq.lock);
230	interrupts_restore(ipl);	214	interrupts_restore(ipl);
231	return;	215	return;
232	}	216	}
233	}	217	}
234		218
235	spinlock_unlock(&ns16550_irq.lock);	219	spinlock_unlock(&ns16550_irq.lock);
236	interrupts_restore(ipl);	220	interrupts_restore(ipl);
237	#endif	221	#endif
238		222
239	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {	223	while (ns16550_lsr_read(&ns16550) & LSR_DATA_READY) {
240	uint8_t x;	224	uint8_t x;
241		225
242	x = ns16550_rbr_read(&ns16550);	226	x = ns16550_rbr_read(&ns16550);
243	#ifndef ia64	227
244	if (x != IGNORE_CODE) {	228	if (x != IGNORE_CODE) {
245	if (x & KEY_RELEASE)	229	if (x & KEY_RELEASE)
246	key_released(x ^ KEY_RELEASE);	230	key_released(x ^ KEY_RELEASE);
247	else	231	else
248	key_pressed(x);	232	key_pressed(x);
249	}	233	}
250	#else	-
251	extern chardev_t kbrd;	-
252	if(x != 0x0d) {	-
253	if (x == 0x7f)	-
254	x = '\b';	-
255	chardev_push_character(&kbrd, x);	-
256	}	-
257	#endif	-
258		-
259	}	234	}
260	}	235	}
261		236
262	irq_ownership_t ns16550_claim(void)	237	irq_ownership_t ns16550_claim(void)
263	{	238	{
264	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);	239	return (ns16550_lsr_read(&ns16550) & LSR_DATA_READY);
265	}	240	}
266		241
267	void ns16550_irq_handler(irq_t irq, void arg, ...)	242	void ns16550_irq_handler(irq_t irq, void arg, ...)
268	{	243	{
269	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)	244	if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
270	ipc_irq_send_notif(irq);	245	ipc_irq_send_notif(irq);
271	else	246	else
272	ns16550_interrupt();	247	ns16550_interrupt();
273	}	248	}
274		249
275	/** @}	250	/** @}
276	*/	251	*/
277		252

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/ns16550.c – Rev 3657 → 3877