Subversion Repositories HelenOS

Rev

Rev 4026 | Rev 4284 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3924 svoboda 1
/*
2
 * Copyright (c) 2006 Josef Cejka
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 kbd_port
30
 * @ingroup  kbd
31
 * @{
32
 */
33
/** @file
34
 * @brief   NS16550 port driver.
35
 */
36
 
37
#include <ipc/ipc.h>
38
#include <async.h>
39
#include <sysinfo.h>
40
#include <kbd.h>
41
#include <kbd_port.h>
42
#include <ddi.h>
43
 
44
/* NS16550 registers */
45
#define RBR_REG     0   /** Receiver Buffer Register. */
46
#define IER_REG     1   /** Interrupt Enable Register. */
47
#define IIR_REG     2   /** Interrupt Ident Register (read). */
48
#define FCR_REG     2   /** FIFO control register (write). */
49
#define LCR_REG     3   /** Line Control register. */
50
#define MCR_REG     4   /** Modem Control Register. */
51
#define LSR_REG     5   /** Line Status Register. */
52
 
3954 jermar 53
#define LSR_DATA_READY  0x01
54
 
55
static irq_cmd_t ns16550_cmds[] = {
56
    {
57
        .cmd = CMD_PIO_READ_8,
58
        .addr = (void *) 0, /* will be patched in run-time */
59
        .dstarg = 1
60
    },
61
    {
62
        .cmd = CMD_BTEST,
63
        .value = LSR_DATA_READY,
64
        .srcarg = 1,
65
        .dstarg = 3
66
    },
67
    {
68
        .cmd = CMD_PREDICATE,
69
        .value = 2,
70
        .srcarg = 3
71
    },
72
    {
73
        .cmd = CMD_PIO_READ_8,
74
        .addr = (void *) 0, /* will be patched in run-time */
75
        .dstarg = 2
76
    },
77
    {
78
        .cmd = CMD_ACCEPT
79
    }
3924 svoboda 80
};
81
 
82
irq_code_t ns16550_kbd = {
3954 jermar 83
    sizeof(ns16550_cmds) / sizeof(irq_cmd_t),
3924 svoboda 84
    ns16550_cmds
85
};
86
 
87
static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call);
88
 
4026 jermar 89
static uintptr_t ns16550_physical;
90
static uintptr_t ns16550_kernel;
3924 svoboda 91
 
92
int kbd_port_init(void)
93
{
4026 jermar 94
    void *vaddr;
95
 
3924 svoboda 96
    async_set_interrupt_received(ns16550_irq_handler);
97
 
4026 jermar 98
    ns16550_physical = sysinfo_value("kbd.address.physical");
99
    ns16550_kernel = sysinfo_value("kbd.address.kernel");
100
    ns16550_kbd.cmds[0].addr = (void *) (ns16550_kernel + LSR_REG);
101
    ns16550_kbd.cmds[3].addr = (void *) (ns16550_kernel + RBR_REG);
4148 decky 102
    ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(),
3924 svoboda 103
        0, &ns16550_kbd);
4026 jermar 104
    return pio_enable((void *) ns16550_physical, 8, &vaddr);
3924 svoboda 105
}
106
 
107
static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call)
108
{
109
    int scan_code = IPC_GET_ARG2(*call);
110
    kbd_push_scancode(scan_code);
111
}
112
 
113
/**
114
 * @}
115
 */