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.
 */
 
 /** @addtogroup mips32
 * @{
 */
/** @file
 */
 
#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 958	Rev 1702
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	/** @addtogroup mips32
-		30	* @{
-		31	*/
-		32	/** @file
-		33	*/
-		34
29	#include <interrupt.h>	35	#include <interrupt.h>
30	#include <arch/cp0.h>	36	#include <arch/cp0.h>
31	#include <arch/drivers/serial.h>	37	#include <arch/drivers/serial.h>
32	#include <console/chardev.h>	38	#include <console/chardev.h>
33	#include <console/console.h>	39	#include <console/console.h>
34		40
35	static chardev_t console;	41	static chardev_t console;
36	static serial_t sconf[SERIAL_MAX];	42	static serial_t sconf[SERIAL_MAX];
37	static bool kb_enabled;	43	static bool kb_enabled;
38		44
39	static void serial_write(chardev_t *d, const char ch)	45	static void serial_write(chardev_t *d, const char ch)
40	{	46	{
41	serial_t sd = (serial_t )d->data;	47	serial_t sd = (serial_t )d->data;
42		48
43	if (ch == '\n')	49	if (ch == '\n')
44	serial_write(d, '\r');	50	serial_write(d, '\r');
45	/* Wait until transmit buffer empty */	51	/* Wait until transmit buffer empty */
46	while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))	52	while (! (SERIAL_READ_LSR(sd->port) & (1<<TRANSMIT_EMPTY_BIT)))
47	;	53	;
48	SERIAL_WRITE(sd->port, ch);	54	SERIAL_WRITE(sd->port, ch);
49	}	55	}
50		56
51	static void serial_enable(chardev_t *d)	57	static void serial_enable(chardev_t *d)
52	{	58	{
53	kb_enabled = true;	59	kb_enabled = true;
54	}	60	}
55		61
56	static void serial_disable(chardev_t *d)	62	static void serial_disable(chardev_t *d)
57	{	63	{
58	kb_enabled = false;	64	kb_enabled = false;
59	}	65	}
60		66
61	int serial_init(void)	67	int serial_init(void)
62	{	68	{
63	int i = 0;	69	int i = 0;
64	if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {	70	if (SERIAL_READ_LSR(SERIAL_COM1) == 0x60) {
65	sconf[i].port = SERIAL_COM1;	71	sconf[i].port = SERIAL_COM1;
66	sconf[i].irq = SERIAL_COM1_IRQ;	72	sconf[i].irq = SERIAL_COM1_IRQ;
67	/* Enable interrupt on available data */	73	/* Enable interrupt on available data */
68	i++;	74	i++;
69	}	75	}
70	return i;	76	return i;
71	}	77	}
72		78
73	/** Read character from serial port, wait until available */	79	/** Read character from serial port, wait until available */
74	static char serial_do_read(chardev_t *dev)	80	static char serial_do_read(chardev_t *dev)
75	{	81	{
76	serial_t sd = (serial_t )dev->data;	82	serial_t sd = (serial_t )dev->data;
77	char ch;	83	char ch;
78		84
79	while (!(SERIAL_READ_LSR(sd->port) & 1))	85	while (!(SERIAL_READ_LSR(sd->port) & 1))
80	;	86	;
81	ch = SERIAL_READ(sd->port);	87	ch = SERIAL_READ(sd->port);
82		88
83	if (ch =='\r')	89	if (ch =='\r')
84	ch = '\n';	90	ch = '\n';
85	return ch;	91	return ch;
86	}	92	}
87		93
88		94
89	/** Process keyboard interrupt. Does not work in simics? */	95	/** Process keyboard interrupt. Does not work in simics? */
90	static void serial_interrupt(int n, void *stack)	96	static void serial_interrupt(int n, void *stack)
91	{	97	{
92	serial_t sd = (serial_t )console.data;	98	serial_t sd = (serial_t )console.data;
93	char ch;	99	char ch;
94		100
95	if (!(SERIAL_READ_LSR(sd->port) & 1))	101	if (!(SERIAL_READ_LSR(sd->port) & 1))
96	return;	102	return;
97	ch = SERIAL_READ(sd->port);	103	ch = SERIAL_READ(sd->port);
98		104
99	if (ch =='\r')	105	if (ch =='\r')
100	ch = '\n';	106	ch = '\n';
101	chardev_push_character(&console, ch);	107	chardev_push_character(&console, ch);
102	}	108	}
103		109
104		110
105		111
106	static chardev_operations_t serial_ops = {	112	static chardev_operations_t serial_ops = {
107	.resume = serial_enable,	113	.resume = serial_enable,
108	.suspend = serial_disable,	114	.suspend = serial_disable,
109	.write = serial_write,	115	.write = serial_write,
110	.read = serial_do_read	116	.read = serial_do_read
111	};	117	};
112		118
113	iroutine old_timer;	119	iroutine old_timer;
114	/** Do polling on timer interrupt */	120	/** Do polling on timer interrupt */
115	static void timer_replace(int n, istate_t *istate)	121	static void timer_replace(int n, istate_t *istate)
116	{	122	{
117	old_timer(n, istate);	123	old_timer(n, istate);
118	serial_interrupt(n, istate);	124	serial_interrupt(n, istate);
119	}	125	}
120		126
121	void serial_console(void)	127	void serial_console(void)
122	{	128	{
123	serial_t *sd = &sconf[0];	129	serial_t *sd = &sconf[0];
124		130
125		131
126	chardev_initialize("serial_console", &console, &serial_ops);	132	chardev_initialize("serial_console", &console, &serial_ops);
127	console.data = sd;	133	console.data = sd;
128	kb_enabled = true;	134	kb_enabled = true;
129		135
130	// int_register(2, "serial_drvr", serial_interrupt);	136	// int_register(2, "serial_drvr", serial_interrupt);
131	/* I don't know why, but the serial interrupts simply	137	/* I don't know why, but the serial interrupts simply
132	* don't work on simics	138	* don't work on simics
133	*/	139	*/
134	old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace);	140	old_timer = int_register(TIMER_IRQ, "serial_drvr_poll", timer_replace);
135		141
136	stdin = &console;	142	stdin = &console;
137	stdout = &console;	143	stdout = &console;
138	}	144	}
-		145
-		146	/** @}
-		147	*/
-		148
139		149

Subversion Repositories HelenOS-historic

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