Subversion Repositories HelenOS

Rev

Rev 4504 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3969 jermar 1
/*
2
 * Copyright (c) 2009 Jakub 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 fhc
30
 * @{
31
 */
32
 
33
/**
34
 * @file    fhc.c
3976 jermar 35
 * @brief   FHC bus controller driver.
3969 jermar 36
 */
37
 
38
#include <ipc/ipc.h>
39
#include <ipc/services.h>
40
#include <ipc/bus.h>
41
#include <ipc/ns.h>
42
#include <sysinfo.h>
43
#include <as.h>
44
#include <ddi.h>
45
#include <align.h>
46
#include <bool.h>
47
#include <errno.h>
48
#include <async.h>
49
#include <align.h>
50
#include <async.h>
51
#include <stdio.h>
52
#include <ipc/devmap.h>
53
 
54
#define NAME "fhc"
55
 
56
#define FHC_UART_INR    0x39    
57
 
58
#define FHC_UART_IMAP   0x0
59
#define FHC_UART_ICLR   0x4
60
 
61
static void *fhc_uart_phys;
62
static volatile uint32_t *fhc_uart_virt;
63
static size_t fhc_uart_size;
64
 
3976 jermar 65
/** Handle one connection to fhc.
3969 jermar 66
 *
67
 * @param iid       Hash of the request that opened the connection.
68
 * @param icall     Call data of the request that opened the connection.
69
 */
70
static void fhc_connection(ipc_callid_t iid, ipc_call_t *icall)
71
{
72
    ipc_callid_t callid;
73
    ipc_call_t call;
74
 
75
    /*
76
     * Answer the first IPC_M_CONNECT_ME_TO call.
77
     */
78
    ipc_answer_0(iid, EOK);
79
 
80
    while (1) {
81
        int inr;
82
 
83
        callid = async_get_call(&call);
84
        switch (IPC_GET_METHOD(call)) {
85
        case BUS_CLEAR_INTERRUPT:
86
            inr = IPC_GET_ARG1(call);
87
            switch (inr) {
88
            case FHC_UART_INR:
89
                fhc_uart_virt[FHC_UART_ICLR] = 0;
90
                ipc_answer_0(callid, EOK);
91
                break;
92
            default:
93
                ipc_answer_0(callid, ENOTSUP);
94
                break;
95
            }
96
            break;
97
        default:
98
            ipc_answer_0(callid, EINVAL);
99
            break;
100
        }
101
    }
102
}
103
 
104
/** Initialize the FHC driver.
105
 *
106
 * So far, the driver heavily depends on information provided by the kernel via
107
 * sysinfo. In the future, there should be a standalone FHC driver.
108
 */
109
static bool fhc_init(void)
110
{
111
    ipcarg_t phonead;
112
 
113
    fhc_uart_size = sysinfo_value("fhc.uart.size");
114
    fhc_uart_phys = (void *) sysinfo_value("fhc.uart.physical");
115
 
116
    if (!fhc_uart_size) {
117
        printf(NAME ": no FHC UART registers found\n");
118
        return false;
119
    }
120
 
121
    fhc_uart_virt = as_get_mappable_page(fhc_uart_size);
122
 
123
    int flags = AS_AREA_READ | AS_AREA_WRITE;
124
    int retval = physmem_map(fhc_uart_phys, (void *) fhc_uart_virt,
125
        ALIGN_UP(fhc_uart_size, PAGE_SIZE) >> PAGE_WIDTH, flags);
126
 
127
    if (retval < 0) {
128
        printf(NAME ": Error mapping FHC UART registers\n");
129
        return false;
130
    }
131
 
132
    printf(NAME ": FHC UART registers at %p, %d bytes\n", fhc_uart_phys,
133
        fhc_uart_size);
134
 
135
    async_set_client_connection(fhc_connection);
136
    ipc_connect_to_me(PHONE_NS, SERVICE_FHC, 0, 0, &phonead);
137
 
138
    return true;
139
}
140
 
141
int main(int argc, char **argv)
142
{
3977 jermar 143
    printf(NAME ": HelenOS FHC bus controller driver\n");
3969 jermar 144
 
145
    if (!fhc_init())
146
        return -1;
147
 
148
    printf(NAME ": Accepting connections\n");
149
    async_manager();
150
 
151
    /* Never reached */
152
    return 0;
153
}
154
 
155
/**
156
 * @}
157
 */