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https://github.com/oliverschmidt/contiki.git
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23e8090257
All drivers implemented so far are for chips which are only available on legacy x86 PCs. This commit moves them into a more appropriate folder, also making the cpu/x86/drivers/ folder ready for other x86 based SoCs.
120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/*
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* Copyright (C) 2015, Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sys/clock.h"
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#include "sys/etimer.h"
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#include "contiki-conf.h"
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#include "drivers/legacy_pc/rtc.h"
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#if CLOCK_CONF_SECOND == 2
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#define FREQ RTC_2_HZ
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#elif CLOCK_CONF_SECOND == 4
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#define FREQ RTC_4_HZ
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#elif CLOCK_CONF_SECOND == 8
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#define FREQ RTC_8_HZ
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#elif CLOCK_CONF_SECOND == 16
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#define FREQ RTC_16_HZ
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#elif CLOCK_CONF_SECOND == 32
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#define FREQ RTC_32_HZ
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#elif CLOCK_CONF_SECOND == 64
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#define FREQ RTC_64_HZ
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#elif CLOCK_CONF_SECOND == 128
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#define FREQ RTC_128_HZ
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#elif CLOCK_CONF_SECOND == 256
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#define FREQ RTC_256_HZ
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#elif CLOCK_CONF_SECOND == 512
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#define FREQ RTC_512_HZ
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#elif CLOCK_CONF_SECOND == 1024
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#define FREQ RTC_1024_HZ
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#elif CLOCK_CONF_SECOND == 2048
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#define FREQ RTC_2048_HZ
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#elif CLOCK_CONF_SECOND == 4096
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#define FREQ RTC_4096_HZ
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#elif CLOCK_CONF_SECOND == 8192
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#define FREQ RTC_8192_HZ
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#else
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#define FREQ -1
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#error "RTC is being used thus CLOCK_CONF_SECOND has to be a value defined by rtc_frequency_t."
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#endif
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static volatile clock_time_t tick_count = 0;
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static void
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update_ticks(void)
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{
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clock_time_t expire = etimer_next_expiration_time();
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tick_count++;
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/* Notify etimer library if the next event timer has expired */
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if(expire != 0 && tick_count >= expire) {
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etimer_request_poll();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_init(void)
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{
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rtc_init(FREQ, update_ticks);
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}
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/*---------------------------------------------------------------------------*/
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clock_time_t
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clock_time(void)
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{
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return tick_count;
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}
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/*---------------------------------------------------------------------------*/
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unsigned long
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clock_seconds(void)
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{
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return tick_count / CLOCK_CONF_SECOND;
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_wait(clock_time_t t)
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{
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clock_time_t initial = tick_count;
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while(tick_count < t + initial);
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_set_seconds(unsigned long sec)
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{
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/* Stubbed function */
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_delay_usec(uint16_t t)
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{
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/* Stubbed function */
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}
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