2011-03-06 08:20:21 +08:00
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/* Blackfin Real Time Clock (RTC) model.
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2014-01-01 11:54:24 +08:00
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Copyright (C) 2010-2014 Free Software Foundation, Inc.
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2011-03-06 08:20:21 +08:00
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Contributed by Analog Devices, Inc.
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This file is part of simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include <time.h>
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#include "sim-main.h"
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#include "dv-sockser.h"
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#include "devices.h"
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#include "dv-bfin_rtc.h"
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/* XXX: This read-only stub setup is based on host system clock. */
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struct bfin_rtc
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{
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bu32 base;
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bu32 stat_shadow;
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/* Order after here is important -- matches hardware MMR layout. */
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bu32 stat;
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bu16 BFIN_MMR_16(ictl);
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bu16 BFIN_MMR_16(istat);
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bu16 BFIN_MMR_16(swcnt);
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bu32 alarm;
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bu16 BFIN_MMR_16(pren);
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};
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#define mmr_base() offsetof(struct bfin_rtc, stat)
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#define mmr_offset(mmr) (offsetof(struct bfin_rtc, mmr) - mmr_base())
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2011-03-16 04:44:11 +08:00
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static const char * const mmr_names[] =
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{
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2011-03-06 08:20:21 +08:00
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"RTC_STAT", "RTC_ICTL", "RTC_ISTAT", "RTC_SWCNT", "RTC_ALARM", "RTC_PREN",
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};
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#define mmr_name(off) mmr_names[(off) / 4]
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static unsigned
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bfin_rtc_io_write_buffer (struct hw *me, const void *source,
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int space, address_word addr, unsigned nr_bytes)
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{
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struct bfin_rtc *rtc = hw_data (me);
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bu32 mmr_off;
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bu32 value;
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bu16 *value16p;
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bu32 *value32p;
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void *valuep;
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if (nr_bytes == 4)
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value = dv_load_4 (source);
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else
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value = dv_load_2 (source);
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mmr_off = addr - rtc->base;
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valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
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value16p = valuep;
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value32p = valuep;
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HW_TRACE_WRITE ();
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/* XXX: These probably need more work. */
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switch (mmr_off)
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{
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case mmr_offset(stat):
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/* XXX: Ignore these since we are wired to host. */
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break;
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case mmr_offset(istat):
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2011-03-24 11:17:14 +08:00
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dv_w1c_2 (value16p, value, ~(1 << 14));
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2011-03-06 08:20:21 +08:00
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break;
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case mmr_offset(alarm):
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break;
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case mmr_offset(ictl):
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/* XXX: This should schedule an event handler. */
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case mmr_offset(swcnt):
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case mmr_offset(pren):
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break;
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}
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return nr_bytes;
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}
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static unsigned
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bfin_rtc_io_read_buffer (struct hw *me, void *dest,
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int space, address_word addr, unsigned nr_bytes)
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{
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struct bfin_rtc *rtc = hw_data (me);
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bu32 mmr_off;
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bu16 *value16p;
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bu32 *value32p;
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void *valuep;
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mmr_off = addr - rtc->base;
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valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
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value16p = valuep;
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value32p = valuep;
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HW_TRACE_READ ();
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switch (mmr_off)
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{
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case mmr_offset(stat):
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{
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time_t t = time (NULL);
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struct tm *tm = localtime (&t);
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bu32 value =
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(((tm->tm_year - 70) * 365 + tm->tm_yday) << 17) |
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(tm->tm_hour << 12) |
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(tm->tm_min << 6) |
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(tm->tm_sec << 0);
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dv_store_4 (dest, value);
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break;
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}
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case mmr_offset(alarm):
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dv_store_4 (dest, *value32p);
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break;
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case mmr_offset(istat):
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case mmr_offset(ictl):
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case mmr_offset(swcnt):
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case mmr_offset(pren):
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dv_store_2 (dest, *value16p);
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break;
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}
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return nr_bytes;
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}
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2011-03-16 04:44:11 +08:00
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static const struct hw_port_descriptor bfin_rtc_ports[] =
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{
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2011-03-06 08:20:21 +08:00
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{ "rtc", 0, 0, output_port, },
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{ NULL, 0, 0, 0, },
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};
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static void
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attach_bfin_rtc_regs (struct hw *me, struct bfin_rtc *rtc)
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{
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address_word attach_address;
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int attach_space;
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unsigned attach_size;
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reg_property_spec reg;
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if (hw_find_property (me, "reg") == NULL)
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hw_abort (me, "Missing \"reg\" property");
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if (!hw_find_reg_array_property (me, "reg", 0, ®))
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hw_abort (me, "\"reg\" property must contain three addr/size entries");
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hw_unit_address_to_attach_address (hw_parent (me),
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®.address,
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&attach_space, &attach_address, me);
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hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
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if (attach_size != BFIN_MMR_RTC_SIZE)
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hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_RTC_SIZE);
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hw_attach_address (hw_parent (me),
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0, attach_space, attach_address, attach_size, me);
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rtc->base = attach_address;
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}
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static void
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bfin_rtc_finish (struct hw *me)
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{
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struct bfin_rtc *rtc;
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rtc = HW_ZALLOC (me, struct bfin_rtc);
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set_hw_data (me, rtc);
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set_hw_io_read_buffer (me, bfin_rtc_io_read_buffer);
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set_hw_io_write_buffer (me, bfin_rtc_io_write_buffer);
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set_hw_ports (me, bfin_rtc_ports);
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attach_bfin_rtc_regs (me, rtc);
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/* Initialize the RTC. */
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}
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2011-03-16 04:55:11 +08:00
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const struct hw_descriptor dv_bfin_rtc_descriptor[] =
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{
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2011-03-06 08:20:21 +08:00
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{"bfin_rtc", bfin_rtc_finish,},
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{NULL, NULL},
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};
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