WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/mips32/src/drivers/serial.c


/*
 * Copyright (C) 2005 Ondrej Palkovsky
 * 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.
 */
 
#include <interrupt.h>
#include <arch/cp0.h>
#include <arch/drivers/serial.h>
#include <console/chardev.h>
#include <console/console.h>
 
static chardev_t console;
static serial_t sconf[SERIAL_MAX];
static bool kb_enabled;
 
static void serial_write(chardev_t *d, const char ch)
{
    serial_t *sd = (serial_t *)d->data;
 
    if (ch == '\n')
        serial_write(d, '\r');
    /* Wait until transmit buffer empty */
    while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))
        ;
    SERIAL_WRITE(sd->port, ch);
}
 
static void serial_enable(chardev_t *d)
{
    kb_enabled = true;
}
 
static void serial_disable(chardev_t *d)
{
    kb_enabled = false;
}
 
int serial_init(void)
{
    int i = 0;
    if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {
        sconf[i].port = SERIAL_COM1;
        sconf[i].irq = SERIAL_COM1_IRQ;
        /* Enable interrupt on available data */
        i++;
    }
    return i;
}
 
/** Read character from serial port, wait until available */
static char serial_do_read(chardev_t *dev)
{
    serial_t *sd = (serial_t *)dev->data;
    char ch;
 
    while (!(SERIAL_READ_LSR(sd->port) & 1))
        ;
    ch = SERIAL_READ(sd->port);
 
    if (ch =='\r')
        ch = '\n';
    return ch;
}
 
 
/** Process keyboard interrupt. Does not work in simics? */
static void serial_interrupt(int n, void *stack)
{
    serial_t *sd = (serial_t *)console.data;
    char ch;
 
    if (!(SERIAL_READ_LSR(sd->port) & 1))
        return;
    ch = SERIAL_READ(sd->port);
 
    if (ch =='\r')
        ch = '\n';
    chardev_push_character(&console, ch);
}
 
 
 
static chardev_operations_t serial_ops = {
    .resume = serial_enable,
    .suspend = serial_disable,
    .write = serial_write,
    .read = serial_do_read
};
 
iroutine old_timer;
/** Do polling on timer interrupt */
static void timer_replace(int n, istate_t *istate)
{
    old_timer(n, istate);
    serial_interrupt(n, istate);
}
 
void serial_console(void)
{
    serial_t *sd = &sconf[0];
 
 
    chardev_initialize("serial_console", &console, &serial_ops);
    console.data = sd;
    kb_enabled = true;
 
//  int_register(2, "serial_drvr", serial_interrupt);
    /* I don't know why, but the serial interrupts simply
     * don't work on simics
     */
    old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace);
   
    stdin = &console;
    stdout = &console;
}
 

Rev 625	Rev 958
1	/*	1	/*
2	* Copyright (C) 2005 Ondrej Palkovsky	2	* Copyright (C) 2005 Ondrej Palkovsky
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	#include <interrupt.h>	29	#include <interrupt.h>
30	#include <arch/cp0.h>	30	#include <arch/cp0.h>
31	#include <arch/drivers/serial.h>	31	#include <arch/drivers/serial.h>
32	#include <console/chardev.h>	32	#include <console/chardev.h>
33	#include <console/console.h>	33	#include <console/console.h>
34		34
35	static chardev_t console;	35	static chardev_t console;
36	static serial_t sconf[SERIAL_MAX];	36	static serial_t sconf[SERIAL_MAX];
37	static bool kb_enabled;	37	static bool kb_enabled;
38		38
39	static void serial_write(chardev_t *d, const char ch)	39	static void serial_write(chardev_t *d, const char ch)
40	{	40	{
41	serial_t sd = (serial_t )d->data;	41	serial_t sd = (serial_t )d->data;
42		42
43	if (ch == '\n')	43	if (ch == '\n')
44	serial_write(d, '\r');	44	serial_write(d, '\r');
45	/* Wait until transmit buffer empty */	45	/* Wait until transmit buffer empty */
46	while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))	46	while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))
47	;	47	;
48	SERIAL_WRITE(sd->port, ch);	48	SERIAL_WRITE(sd->port, ch);
49	}	49	}
50		50
51	static void serial_enable(chardev_t *d)	51	static void serial_enable(chardev_t *d)
52	{	52	{
53	kb_enabled = true;	53	kb_enabled = true;
54	}	54	}
55		55
56	static void serial_disable(chardev_t *d)	56	static void serial_disable(chardev_t *d)
57	{	57	{
58	kb_enabled = false;	58	kb_enabled = false;
59	}	59	}
60		60
61	int serial_init(void)	61	int serial_init(void)
62	{	62	{
63	int i = 0;	63	int i = 0;
64	if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {	64	if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {
65	sconf[i].port = SERIAL_COM1;	65	sconf[i].port = SERIAL_COM1;
66	sconf[i].irq = SERIAL_COM1_IRQ;	66	sconf[i].irq = SERIAL_COM1_IRQ;
67	/* Enable interrupt on available data */	67	/* Enable interrupt on available data */
68	i++;	68	i++;
69	}	69	}
70	return i;	70	return i;
71	}	71	}
72		72
73	/** Read character from serial port, wait until available */	73	/** Read character from serial port, wait until available */
74	static char serial_do_read(chardev_t *dev)	74	static char serial_do_read(chardev_t *dev)
75	{	75	{
76	serial_t sd = (serial_t )dev->data;	76	serial_t sd = (serial_t )dev->data;
77	char ch;	77	char ch;
78		78
79	while (!(SERIAL_READ_LSR(sd->port) & 1))	79	while (!(SERIAL_READ_LSR(sd->port) & 1))
80	;	80	;
81	ch = SERIAL_READ(sd->port);	81	ch = SERIAL_READ(sd->port);
82		82
83	if (ch =='\r')	83	if (ch =='\r')
84	ch = '\n';	84	ch = '\n';
85	return ch;	85	return ch;
86	}	86	}
87		87
88		88
89	/** Process keyboard interrupt. Does not work in simics? */	89	/** Process keyboard interrupt. Does not work in simics? */
90	static void serial_interrupt(int n, void *stack)	90	static void serial_interrupt(int n, void *stack)
91	{	91	{
92	serial_t sd = (serial_t )console.data;	92	serial_t sd = (serial_t )console.data;
93	char ch;	93	char ch;
94		94
95	if (!(SERIAL_READ_LSR(sd->port) & 1))	95	if (!(SERIAL_READ_LSR(sd->port) & 1))
96	return;	96	return;
97	ch = SERIAL_READ(sd->port);	97	ch = SERIAL_READ(sd->port);
98		98
99	if (ch =='\r')	99	if (ch =='\r')
100	ch = '\n';	100	ch = '\n';
101	chardev_push_character(&console, ch);	101	chardev_push_character(&console, ch);
102	}	102	}
103		103
104		104
105		105
106	static chardev_operations_t serial_ops = {	106	static chardev_operations_t serial_ops = {
107	.resume = serial_enable,	107	.resume = serial_enable,
108	.suspend = serial_disable,	108	.suspend = serial_disable,
109	.write = serial_write,	109	.write = serial_write,
110	.read = serial_do_read	110	.read = serial_do_read
111	};	111	};
112		112
113	iroutine old_timer;	113	iroutine old_timer;
114	/** Do polling on timer interrupt */	114	/** Do polling on timer interrupt */
115	static void timer_replace(int n, void *stack)	115	static void timer_replace(int n, istate_t *istate)
116	{	116	{
117	old_timer(n, stack);	117	old_timer(n, istate);
118	serial_interrupt(n, stack);	118	serial_interrupt(n, istate);
119	}	119	}
120		120
121	void serial_console(void)	121	void serial_console(void)
122	{	122	{
123	serial_t *sd = &sconf[0];	123	serial_t *sd = &sconf[0];
124		124
125		125
126	chardev_initialize("serial_console", &console, &serial_ops);	126	chardev_initialize("serial_console", &console, &serial_ops);
127	console.data = sd;	127	console.data = sd;
128	kb_enabled = true;	128	kb_enabled = true;
129		129
130	// int_register(2, "serial_drvr", serial_interrupt);	130	// int_register(2, "serial_drvr", serial_interrupt);
131	/* I don't know why, but the serial interrupts simply	131	/* I don't know why, but the serial interrupts simply
132	* don't work on simics	132	* don't work on simics
133	*/	133	*/
134	old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace);	134	old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace);
135		135
136	stdin = &console;	136	stdin = &console;
137	stdout = &console;	137	stdout = &console;
138	}	138	}
139		139

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/mips32/src/drivers/serial.c @ 1702 – Rev 625 → 958