WebSVN – HelenOS – Diff – /branches/dynload/kernel/genarch/src/drivers/ns16550/ns16550.c


/*
 * Copyright (c) 2009 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 <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 <synch/spinlock.h>
#include <mm/slab.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,
};
 
/** Initialize ns16550.
 *
 * @param dev       Addrress of the beginning of the device in I/O space.
 * @param devno     Device number.
 * @param inr       Interrupt number.
 * @param cir       Clear interrupt function.
 * @param cir_arg   First argument to cir.
 *
 * @return      True on success, false on failure.
 */
bool
ns16550_init(ns16550_t *dev, devno_t devno, inr_t inr, cir_t cir, void *cir_arg)
{
    ns16550_instance_t *instance;
 
    chardev_initialize("ns16550_kbd", &kbrd, &ops);
    stdin = &kbrd;
   
    instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
    if (!instance)
        return false;
 
    instance->devno = devno;
    instance->ns16550 = dev;
   
    irq_initialize(&instance->irq);
    instance->irq.devno = devno;
    instance->irq.inr = inr;
    instance->irq.claim = ns16550_claim;
    instance->irq.handler = ns16550_irq_handler;
    instance->irq.instance = instance;
    instance->irq.cir = cir;
    instance->irq.cir_arg = cir_arg;
    irq_register(&instance->irq);
 
    while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
        (void) pio_read_8(&dev->rbr);
   
 
 
 
 
 
 
 
 
 
 
 
    /* Enable interrupts */
    pio_write_8(&dev->ier, IER_ERBFI);
    pio_write_8(&dev->mcr, MCR_OUT2);
   
    return true;
}
 
/* Called from getc(). */
void ns16550_resume(chardev_t *d)
{
}
 
/* Called from getc(). */
void ns16550_suspend(chardev_t *d)
{
}
 
irq_ownership_t ns16550_claim(irq_t *irq)
{
    ns16550_instance_t *ns16550_instance = irq->instance;
    ns16550_t *dev = ns16550_instance->ns16550;
 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY)
        return IRQ_ACCEPT;
    else
        return IRQ_DECLINE;
}
 
void ns16550_irq_handler(irq_t *irq)
{
    ns16550_instance_t *ns16550_instance = irq->instance;
    ns16550_t *dev = ns16550_instance->ns16550;
 
    if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
        uint8_t x;
       
        x = pio_read_8(&dev->rbr);
       
        if (x != IGNORE_CODE) {
            if (x & KEY_RELEASE)
                key_released(x ^ KEY_RELEASE);
            else
                key_pressed(x);
        }
    }
 
}
 
/** @}
 */
 

Rev 3959	Rev 3982
1	/*	1	/*
2	* Copyright (c) 2001-2006 Jakub Jermar	2	* Copyright (c) 2009 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	#include <ddi/irq.h>	42	#include <ddi/irq.h>
43	#include <cpu.h>	43	#include <cpu.h>
44	#include <arch/asm.h>	44	#include <arch/asm.h>
45	#include <arch.h>	45	#include <arch.h>
46	#include <console/chardev.h>	46	#include <console/chardev.h>
47	#include <console/console.h>	47	#include <console/console.h>
48	#include <interrupt.h>	48	#include <interrupt.h>
49	#include <arch/interrupt.h>	49	#include <arch/interrupt.h>
50	#include <sysinfo/sysinfo.h>	-
51	#include <synch/spinlock.h>	50	#include <synch/spinlock.h>
52	#include <mm/slab.h>	51	#include <mm/slab.h>
53		52
54	#define LSR_DATA_READY 0x01	53	#define LSR_DATA_READY 0x01
55		54
56	/*	55	/*
57	* These codes read from ns16550 data register are silently ignored.	56	* These codes read from ns16550 data register are silently ignored.
58	*/	57	*/
59	#define IGNORE_CODE 0x7f /* all keys up */	58	#define IGNORE_CODE 0x7f /* all keys up */
60		59
61	static void ns16550_suspend(chardev_t *);	60	static void ns16550_suspend(chardev_t *);
62	static void ns16550_resume(chardev_t *);	61	static void ns16550_resume(chardev_t *);
63		62
64	static chardev_operations_t ops = {	63	static chardev_operations_t ops = {
65	.suspend = ns16550_suspend,	64	.suspend = ns16550_suspend,
66	.resume = ns16550_resume,	65	.resume = ns16550_resume,
67	};	66	};
68		67
69	/** Initialize ns16550.	68	/** Initialize ns16550.
70	*	69	*
71	* @param dev Addrress of the beginning of the device in I/O space.	70	* @param dev Addrress of the beginning of the device in I/O space.
72	* @param devno Device number.	71	* @param devno Device number.
73	* @param inr Interrupt number.	72	* @param inr Interrupt number.
74	* @param cir Clear interrupt function.	73	* @param cir Clear interrupt function.
75	* @param cir_arg First argument to cir.	74	* @param cir_arg First argument to cir.
76	*	75	*
77	* @return True on success, false on failure.	76	* @return True on success, false on failure.
78	*/	77	*/
79	bool	78	bool
80	ns16550_init(ns16550_t dev, devno_t devno, inr_t inr, cir_t cir, void cir_arg)	79	ns16550_init(ns16550_t dev, devno_t devno, inr_t inr, cir_t cir, void cir_arg)
81	{	80	{
82	ns16550_instance_t *instance;	81	ns16550_instance_t *instance;
83		82
84	chardev_initialize("ns16550_kbd", &kbrd, &ops);	83	chardev_initialize("ns16550_kbd", &kbrd, &ops);
85	stdin = &kbrd;	84	stdin = &kbrd;
86		85
87	instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);	86	instance = malloc(sizeof(ns16550_instance_t), FRAME_ATOMIC);
88	if (!instance)	87	if (!instance)
89	return false;	88	return false;
90		89
91	instance->devno = devno;	90	instance->devno = devno;
92	instance->ns16550 = dev;	91	instance->ns16550 = dev;
93		92
94	irq_initialize(&instance->irq);	93	irq_initialize(&instance->irq);
95	instance->irq.devno = devno;	94	instance->irq.devno = devno;
96	instance->irq.inr = inr;	95	instance->irq.inr = inr;
97	instance->irq.claim = ns16550_claim;	96	instance->irq.claim = ns16550_claim;
98	instance->irq.handler = ns16550_irq_handler;	97	instance->irq.handler = ns16550_irq_handler;
99	instance->irq.instance = instance;	98	instance->irq.instance = instance;
100	instance->irq.cir = cir;	99	instance->irq.cir = cir;
101	instance->irq.cir_arg = cir_arg;	100	instance->irq.cir_arg = cir_arg;
102	irq_register(&instance->irq);	101	irq_register(&instance->irq);
103		102
104	while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))	103	while ((pio_read_8(&dev->lsr) & LSR_DATA_READY))
105	(void) pio_read_8(&dev->rbr);	104	(void) pio_read_8(&dev->rbr);
106		105
107	/*	-
108	* This is the necessary evil until the userspace driver is entirely	-
109	* self-sufficient.	-
110	*/	-
111	sysinfo_set_item_val("kbd", NULL, true);	-
112	sysinfo_set_item_val("kbd.type", NULL, KBD_NS16550);	-
113	sysinfo_set_item_val("kbd.devno", NULL, devno);	-
114	sysinfo_set_item_val("kbd.inr", NULL, inr);	-
115	sysinfo_set_item_val("kbd.address.virtual", NULL, (uintptr_t) dev);	-
116	sysinfo_set_item_val("kbd.port", NULL, (uintptr_t) dev);	-
117		-
118	/* Enable interrupts */	106	/* Enable interrupts */
119	pio_write_8(&dev->ier, IER_ERBFI);	107	pio_write_8(&dev->ier, IER_ERBFI);
120	pio_write_8(&dev->mcr, MCR_OUT2);	108	pio_write_8(&dev->mcr, MCR_OUT2);
121		109
122	return true;	110	return true;
123	}	111	}
124		112
125	/* Called from getc(). */	113	/* Called from getc(). */
126	void ns16550_resume(chardev_t *d)	114	void ns16550_resume(chardev_t *d)
127	{	115	{
128	}	116	}
129		117
130	/* Called from getc(). */	118	/* Called from getc(). */
131	void ns16550_suspend(chardev_t *d)	119	void ns16550_suspend(chardev_t *d)
132	{	120	{
133	}	121	}
134		122
135	irq_ownership_t ns16550_claim(irq_t *irq)	123	irq_ownership_t ns16550_claim(irq_t *irq)
136	{	124	{
137	ns16550_instance_t *ns16550_instance = irq->instance;	125	ns16550_instance_t *ns16550_instance = irq->instance;
138	ns16550_t *dev = ns16550_instance->ns16550;	126	ns16550_t *dev = ns16550_instance->ns16550;
139		127
140	if (pio_read_8(&dev->lsr) & LSR_DATA_READY)	128	if (pio_read_8(&dev->lsr) & LSR_DATA_READY)
141	return IRQ_ACCEPT;	129	return IRQ_ACCEPT;
142	else	130	else
143	return IRQ_DECLINE;	131	return IRQ_DECLINE;
144	}	132	}
145		133
146	void ns16550_irq_handler(irq_t *irq)	134	void ns16550_irq_handler(irq_t *irq)
147	{	135	{
148	ns16550_instance_t *ns16550_instance = irq->instance;	136	ns16550_instance_t *ns16550_instance = irq->instance;
149	ns16550_t *dev = ns16550_instance->ns16550;	137	ns16550_t *dev = ns16550_instance->ns16550;
150		138
151	if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {	139	if (pio_read_8(&dev->lsr) & LSR_DATA_READY) {
152	uint8_t x;	140	uint8_t x;
153		141
154	x = pio_read_8(&dev->rbr);	142	x = pio_read_8(&dev->rbr);
155		143
156	if (x != IGNORE_CODE) {	144	if (x != IGNORE_CODE) {
157	if (x & KEY_RELEASE)	145	if (x & KEY_RELEASE)
158	key_released(x ^ KEY_RELEASE);	146	key_released(x ^ KEY_RELEASE);
159	else	147	else
160	key_pressed(x);	148	key_pressed(x);
161	}	149	}
162	}	150	}
163		151
164	}	152	}
165		153
166	/** @}	154	/** @}
167	*/	155	*/
168		156

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(root)/branches/dynload/kernel/genarch/src/drivers/ns16550/ns16550.c @ 4347 – Rev 3959 → 3982