| 1 |
/* |
| 2 |
* Copyright (C) 2006-2007 Anders Gavare. All rights reserved. |
| 3 |
* |
| 4 |
* Redistribution and use in source and binary forms, with or without |
| 5 |
* modification, are permitted provided that the following conditions are met: |
| 6 |
* |
| 7 |
* 1. Redistributions of source code must retain the above copyright |
| 8 |
* notice, this list of conditions and the following disclaimer. |
| 9 |
* 2. Redistributions in binary form must reproduce the above copyright |
| 10 |
* notice, this list of conditions and the following disclaimer in the |
| 11 |
* documentation and/or other materials provided with the distribution. |
| 12 |
* 3. The name of the author may not be used to endorse or promote products |
| 13 |
* derived from this software without specific prior written permission. |
| 14 |
* |
| 15 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 |
* SUCH DAMAGE. |
| 26 |
* |
| 27 |
* |
| 28 |
* $Id: dev_mk48txx.c,v 1.8 2007/06/15 19:57:33 debug Exp $ |
| 29 |
* |
| 30 |
* COMMENT: Mostek MK48Txx Real Time Clock |
| 31 |
* |
| 32 |
* TODO: |
| 33 |
* Only the MK48T08 is implemented so far. |
| 34 |
*/ |
| 35 |
|
| 36 |
#include <stdio.h> |
| 37 |
#include <stdlib.h> |
| 38 |
#include <string.h> |
| 39 |
#include <time.h> |
| 40 |
|
| 41 |
#include "cpu.h" |
| 42 |
#include "device.h" |
| 43 |
#include "emul.h" |
| 44 |
#include "machine.h" |
| 45 |
#include "memory.h" |
| 46 |
#include "misc.h" |
| 47 |
|
| 48 |
|
| 49 |
#include "mk48txxreg.h" |
| 50 |
|
| 51 |
|
| 52 |
#define MK48TXX_LEN MK48T08_CLKSZ |
| 53 |
|
| 54 |
#define BCD(x) ((((x) / 10) << 4) + ((x) % 10)) |
| 55 |
|
| 56 |
struct mk48txx_data { |
| 57 |
uint8_t reg[MK48TXX_LEN]; |
| 58 |
}; |
| 59 |
|
| 60 |
|
| 61 |
void mk48txx_update_regs(struct mk48txx_data *d) |
| 62 |
{ |
| 63 |
struct tm *tmp; |
| 64 |
time_t timet; |
| 65 |
|
| 66 |
timet = time(NULL); |
| 67 |
tmp = gmtime(&timet); |
| 68 |
|
| 69 |
d->reg[MK48T08_CLKOFF + MK48TXX_ISEC] = BCD(tmp->tm_sec); |
| 70 |
d->reg[MK48T08_CLKOFF + MK48TXX_IMIN] = BCD(tmp->tm_min); |
| 71 |
d->reg[MK48T08_CLKOFF + MK48TXX_IHOUR] = BCD(tmp->tm_hour); |
| 72 |
d->reg[MK48T08_CLKOFF + MK48TXX_IWDAY] = tmp->tm_wday + 1; |
| 73 |
d->reg[MK48T08_CLKOFF + MK48TXX_IDAY] = BCD(tmp->tm_mday); |
| 74 |
d->reg[MK48T08_CLKOFF + MK48TXX_IMON] = BCD(tmp->tm_mon + 1); |
| 75 |
d->reg[MK48T08_CLKOFF + MK48TXX_IYEAR] = BCD(tmp->tm_year % 100); |
| 76 |
} |
| 77 |
|
| 78 |
|
| 79 |
DEVICE_ACCESS(mk48txx) |
| 80 |
{ |
| 81 |
struct mk48txx_data *d = extra; |
| 82 |
uint64_t idata = 0, odata = 0; |
| 83 |
|
| 84 |
if (writeflag == MEM_WRITE) |
| 85 |
idata = memory_readmax64(cpu, data, len); |
| 86 |
|
| 87 |
if (writeflag == MEM_READ) |
| 88 |
odata = d->reg[relative_addr]; |
| 89 |
|
| 90 |
if (relative_addr < MK48T08_CLKOFF || |
| 91 |
relative_addr >= MK48T08_CLKOFF + MK48TXX_ISEC) { |
| 92 |
/* Reads and writes to the RAM part of the mk48txx, or |
| 93 |
the clock registers, are OK: */ |
| 94 |
if (writeflag == MEM_WRITE) |
| 95 |
d->reg[relative_addr] = idata; |
| 96 |
goto ret; |
| 97 |
} |
| 98 |
|
| 99 |
switch (relative_addr) { |
| 100 |
|
| 101 |
case MK48T08_CLKOFF + MK48TXX_ICSR: |
| 102 |
if (writeflag == MEM_WRITE) { |
| 103 |
if ((idata & MK48TXX_CSR_READ) && |
| 104 |
!(d->reg[relative_addr] & MK48TXX_CSR_READ)) { |
| 105 |
/* Switching the read bit from 0 to 1 causes |
| 106 |
registers to be "froozen". In the emulator, |
| 107 |
simply updating them with data from the |
| 108 |
host should be good enough. */ |
| 109 |
mk48txx_update_regs(d); |
| 110 |
} |
| 111 |
d->reg[relative_addr] = idata; |
| 112 |
} |
| 113 |
break; |
| 114 |
|
| 115 |
default:if (writeflag == MEM_READ) |
| 116 |
fatal("[ mk48txx: unimplemented READ from offset 0x%x ]" |
| 117 |
"\n", (int)relative_addr); |
| 118 |
else |
| 119 |
fatal("[ mk48txx: unimplemented WRITE to offset 0x%x: " |
| 120 |
"0x%x ]\n", (int)relative_addr, (int)idata); |
| 121 |
exit(1); |
| 122 |
} |
| 123 |
|
| 124 |
ret: |
| 125 |
if (writeflag == MEM_READ) |
| 126 |
memory_writemax64(cpu, data, len, odata); |
| 127 |
|
| 128 |
return 1; |
| 129 |
} |
| 130 |
|
| 131 |
|
| 132 |
DEVINIT(mk48txx) |
| 133 |
{ |
| 134 |
struct mk48txx_data *d; |
| 135 |
|
| 136 |
CHECK_ALLOCATION(d = malloc(sizeof(struct mk48txx_data))); |
| 137 |
memset(d, 0, sizeof(struct mk48txx_data)); |
| 138 |
|
| 139 |
mk48txx_update_regs(d); |
| 140 |
|
| 141 |
memory_device_register(devinit->machine->memory, devinit->name, |
| 142 |
devinit->addr, MK48TXX_LEN, dev_mk48txx_access, (void *)d, |
| 143 |
DM_DEFAULT, NULL); |
| 144 |
|
| 145 |
return 1; |
| 146 |
} |
| 147 |
|
Parent Directory
| 
Revision Log