1 /* Blackfin Real Time Clock (RTC) model.
3 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "dv-sockser.h"
27 #include "dv-bfin_rtc.h"
29 /* XXX: This read-only stub setup is based on host system clock. */
36 /* Order after here is important -- matches hardware MMR layout. */
38 bu16 BFIN_MMR_16(ictl);
39 bu16 BFIN_MMR_16(istat);
40 bu16 BFIN_MMR_16(swcnt);
42 bu16 BFIN_MMR_16(pren);
44 #define mmr_base() offsetof(struct bfin_rtc, stat)
45 #define mmr_offset(mmr) (offsetof(struct bfin_rtc, mmr) - mmr_base())
47 static const char * const mmr_names[] =
49 "RTC_STAT", "RTC_ICTL", "RTC_ISTAT", "RTC_SWCNT", "RTC_ALARM", "RTC_PREN",
51 #define mmr_name(off) mmr_names[(off) / 4]
54 bfin_rtc_io_write_buffer (struct hw *me, const void *source,
55 int space, address_word addr, unsigned nr_bytes)
57 struct bfin_rtc *rtc = hw_data (me);
65 value = dv_load_4 (source);
67 value = dv_load_2 (source);
69 mmr_off = addr - rtc->base;
70 valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
76 /* XXX: These probably need more work. */
79 case mmr_offset(stat):
80 /* XXX: Ignore these since we are wired to host. */
82 case mmr_offset(istat):
83 dv_w1c_2 (value16p, value, ~(1 << 14));
85 case mmr_offset(alarm):
87 case mmr_offset(ictl):
88 /* XXX: This should schedule an event handler. */
89 case mmr_offset(swcnt):
90 case mmr_offset(pren):
98 bfin_rtc_io_read_buffer (struct hw *me, void *dest,
99 int space, address_word addr, unsigned nr_bytes)
101 struct bfin_rtc *rtc = hw_data (me);
107 mmr_off = addr - rtc->base;
108 valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
116 case mmr_offset(stat):
118 time_t t = time (NULL);
119 struct tm *tm = localtime (&t);
121 (((tm->tm_year - 70) * 365 + tm->tm_yday) << 17) |
122 (tm->tm_hour << 12) |
125 dv_store_4 (dest, value);
128 case mmr_offset(alarm):
129 dv_store_4 (dest, *value32p);
131 case mmr_offset(istat):
132 case mmr_offset(ictl):
133 case mmr_offset(swcnt):
134 case mmr_offset(pren):
135 dv_store_2 (dest, *value16p);
142 static const struct hw_port_descriptor bfin_rtc_ports[] =
144 { "rtc", 0, 0, output_port, },
149 attach_bfin_rtc_regs (struct hw *me, struct bfin_rtc *rtc)
151 address_word attach_address;
153 unsigned attach_size;
154 reg_property_spec reg;
156 if (hw_find_property (me, "reg") == NULL)
157 hw_abort (me, "Missing \"reg\" property");
159 if (!hw_find_reg_array_property (me, "reg", 0, ®))
160 hw_abort (me, "\"reg\" property must contain three addr/size entries");
162 hw_unit_address_to_attach_address (hw_parent (me),
164 &attach_space, &attach_address, me);
165 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
167 if (attach_size != BFIN_MMR_RTC_SIZE)
168 hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_RTC_SIZE);
170 hw_attach_address (hw_parent (me),
171 0, attach_space, attach_address, attach_size, me);
173 rtc->base = attach_address;
177 bfin_rtc_finish (struct hw *me)
179 struct bfin_rtc *rtc;
181 rtc = HW_ZALLOC (me, struct bfin_rtc);
183 set_hw_data (me, rtc);
184 set_hw_io_read_buffer (me, bfin_rtc_io_read_buffer);
185 set_hw_io_write_buffer (me, bfin_rtc_io_write_buffer);
186 set_hw_ports (me, bfin_rtc_ports);
188 attach_bfin_rtc_regs (me, rtc);
190 /* Initialize the RTC. */
193 const struct hw_descriptor dv_bfin_rtc_descriptor[] =
195 {"bfin_rtc", bfin_rtc_finish,},