Subversion Repositories HelenOS

Rev

Rev 3593 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1844 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1844 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup genarch
30
 * @{
31
 */
32
/**
33
 * @file
34
 * @brief   Headers for NS 16550 serial port / keyboard driver.
35
 */
36
 
37
#ifndef KERN_NS16550_H_
38
#define KERN_NS16550_H_
39
 
2089 decky 40
#include <console/chardev.h> 
3665 rimsky 41
#include <ddi/irq.h>
2089 decky 42
#include <ipc/irq.h>
1896 jermar 43
 
3665 rimsky 44
extern void ns16550_init(devno_t, uintptr_t, inr_t, cir_t, void *);
1844 jermar 45
extern void ns16550_poll(void);
46
extern void ns16550_grab(void);
47
extern void ns16550_release(void);
3665 rimsky 48
extern char ns16550_key_read(chardev_t *);
1919 jermar 49
extern irq_ownership_t ns16550_claim(void);
3665 rimsky 50
extern void ns16550_irq_handler(irq_t *, void *, ...);
1844 jermar 51
 
3593 rimsky 52
#include <arch/types.h>
53
#ifndef ia64
54
#include <arch/drivers/kbd.h>
1844 jermar 55
#endif
3593 rimsky 56
/* NS16550 registers */
57
#define RBR_REG     0   /** Receiver Buffer Register. */
58
#define IER_REG     1   /** Interrupt Enable Register. */
59
#define IIR_REG     2   /** Interrupt Ident Register (read). */
60
#define FCR_REG     2   /** FIFO control register (write). */
61
#define LCR_REG     3   /** Line Control register. */
3665 rimsky 62
#define MCR_REG     4   /** Modem Control Register. */
3593 rimsky 63
#define LSR_REG     5   /** Line Status Register. */
1844 jermar 64
 
3593 rimsky 65
#define IER_ERBFI   0x01    /** Enable Receive Buffer Full Interrupt. */
66
 
67
#define LCR_DLAB    0x80    /** Divisor Latch Access bit. */
68
 
3665 rimsky 69
#define MCR_OUT2    0x08    /** OUT2. */
70
 
3593 rimsky 71
/** Structure representing the ns16550 device. */
72
typedef struct {
73
    devno_t devno;
3665 rimsky 74
    /** Memory mapped registers of the ns16550. */
75
    volatile ioport_t io_port;
3593 rimsky 76
} ns16550_t;
77
 
78
static inline uint8_t ns16550_rbr_read(ns16550_t *dev)
79
{
3665 rimsky 80
    return inb(dev->io_port + RBR_REG);
3593 rimsky 81
}
82
static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v)
83
{
3665 rimsky 84
    outb(dev->io_port + RBR_REG, v);
3593 rimsky 85
}
86
 
87
static inline uint8_t ns16550_ier_read(ns16550_t *dev)
88
{
3665 rimsky 89
    return inb(dev->io_port + IER_REG);
3593 rimsky 90
}
91
 
92
static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v)
93
{
3665 rimsky 94
    outb(dev->io_port + IER_REG, v);
3593 rimsky 95
}
96
 
97
static inline uint8_t ns16550_iir_read(ns16550_t *dev)
98
{
3665 rimsky 99
    return inb(dev->io_port + IIR_REG);
3593 rimsky 100
}
101
 
102
static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v)
103
{
3665 rimsky 104
    outb(dev->io_port + FCR_REG, v);
3593 rimsky 105
}
106
 
107
static inline uint8_t ns16550_lcr_read(ns16550_t *dev)
108
{
3665 rimsky 109
    return inb(dev->io_port + LCR_REG);
3593 rimsky 110
}
111
 
112
static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v)
113
{
3665 rimsky 114
    outb(dev->io_port + LCR_REG, v);
3593 rimsky 115
}
116
 
117
static inline uint8_t ns16550_lsr_read(ns16550_t *dev)
118
{
3665 rimsky 119
    return inb(dev->io_port + LSR_REG);
3593 rimsky 120
}
121
 
3665 rimsky 122
static inline uint8_t ns16550_mcr_read(ns16550_t *dev)
123
{
124
    return inb(dev->io_port + MCR_REG);
125
}
3593 rimsky 126
 
3665 rimsky 127
static inline void ns16550_mcr_write(ns16550_t *dev, uint8_t v)
128
{
129
    outb(dev->io_port + MCR_REG, v);
130
}
3593 rimsky 131
 
132
#endif
133
 
1844 jermar 134
/** @}
135
 */