317 lines
9.1 KiB
C
317 lines
9.1 KiB
C
/****************************************************************************
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* configs/sam4s-xplained-pro/src/sam_tc.c
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Bob Doiron
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* 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 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <debug.h>
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#include <sched.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <nuttx/arch.h>
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#include <nuttx/timers/timer.h>
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#include <nuttx/clock.h>
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#include <nuttx/kthread.h>
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#include <arch/board/board.h>
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#include "sam_lowputc.h"
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#include "sam_tc.h"
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#include "sam_rtt.h"
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#ifdef CONFIG_TIMER
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#if !(defined(CONFIG_SAM34_TC0) || defined(CONFIG_SAM34_TC1) || defined(CONFIG_SAM34_TC2) \
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|| defined(CONFIG_SAM34_TC3) || defined(CONFIG_SAM34_TC4) || defined(CONFIG_SAM34_RTT) )
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# warning "CONFIG_SAM34_TCx or CONFIG_SAM34_RTT must be defined"
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#endif
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/* Select the path to the registered watchdog timer device */
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#ifndef CONFIG_TIMER0_DEVPATH
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# define CONFIG_TIMER0_DEVPATH "/dev/tc0"
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#endif
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#ifndef CONFIG_TIMER1_DEVPATH
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# define CONFIG_TIMER1_DEVPATH "/dev/tc1"
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#endif
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#ifndef CONFIG_TIMER2_DEVPATH
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# define CONFIG_TIMER2_DEVPATH "/dev/tc2"
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#endif
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#ifndef CONFIG_TIMER3_DEVPATH
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# define CONFIG_TIMER3_DEVPATH "/dev/tc3"
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#endif
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#ifndef CONFIG_TIMER4_DEVPATH
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# define CONFIG_TIMER4_DEVPATH "/dev/tc4"
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#endif
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#ifndef CONFIG_TIMER5_DEVPATH
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# define CONFIG_TIMER5_DEVPATH "/dev/tc5"
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#endif
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#ifndef CONFIG_RTT_DEVPATH
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# define CONFIG_RTT_DEVPATH "/dev/rtt0"
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#endif
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/* Timer Definitions ********************************************************/
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/* Debug ********************************************************************/
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/* Non-standard debug that may be enabled just for testing the watchdog
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* timer
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*/
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#ifndef CONFIG_DEBUG
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# undef CONFIG_DEBUG_TIMER
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#endif
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#ifdef CONFIG_DEBUG_TIMER
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# define tcdbg dbg
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# define tclldbg lldbg
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# ifdef CONFIG_DEBUG_VERBOSE
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# define tcvdbg vdbg
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# define tcllvdbg llvdbg
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# else
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# define tcvdbg(x...)
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# define tcllvdbg(x...)
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# endif
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#else
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# define tcdbg(x...)
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# define tclldbg(x...)
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# define tcvdbg(x...)
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# define tcllvdbg(x...)
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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#if defined(CONFIG_SYSTEMTICK_EXTCLK) && !defined(CONFIG_SUPPRESS_INTERRUPTS) && \
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!defined(CONFIG_SUPPRESS_TIMER_INTS)
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static bool systemtick(FAR uint32_t *next_interval_us)
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{
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sched_process_timer();
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return true; // reload, no change to interval
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}
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#endif /* CONFIG_SYSTEMTICK_EXTCLK && !CONFIG_SUPPRESS_INTERRUPTS && !CONFIG_SUPPRESS_TIMER_INTS */
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#if defined(CONFIG_SCHED_CPULOAD) && defined(CONFIG_SCHED_CPULOAD_EXTCLK)
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static bool calc_cpuload(FAR uint32_t *next_interval_us)
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{
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sched_process_cpuload();
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return TRUE; /* Reload, no change to interval */
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}
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#endif /* CONFIG_SCHED_CPULOAD && CONFIG_SCHED_CPULOAD_EXTCLK */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sam_timerinitialize()
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*
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* Description:
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* Perform architecture-specific initialization of the timer hardware.
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*
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****************************************************************************/
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int sam_timerinitialize(void)
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{
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int fd;
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int ret;
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/* Initialize and register the timer devices */
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#if defined(CONFIG_SAM34_TC0)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER0_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER0_DEVPATH, SAM_IRQ_TC0);
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#endif
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#if defined(CONFIG_SAM34_TC1)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER1_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER1_DEVPATH, SAM_IRQ_TC1);
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#endif
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#if defined(CONFIG_SAM34_TC2)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER2_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER2_DEVPATH, SAM_IRQ_TC2);
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#endif
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#if defined(CONFIG_SAM34_TC3)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER3_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER3_DEVPATH, SAM_IRQ_TC3);
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#endif
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#if defined(CONFIG_SAM34_TC4)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER4_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER4_DEVPATH, SAM_IRQ_TC4);
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#endif
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#if defined(CONFIG_SAM34_TC5)
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tcvdbg("Initializing %s...\n", CONFIG_TIMER5_DEVPATH);
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sam_tcinitialize(CONFIG_TIMER5_DEVPATH, SAM_IRQ_TC5);
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#endif
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#if defined(CONFIG_SAM34_RTT)
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tcvdbg("Initializing %s...\n", CONFIG_RTT_DEVPATH);
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sam_rttinitialize(CONFIG_RTT_DEVPATH);
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#endif
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#if defined(CONFIG_SYSTEMTICK_EXTCLK) && !defined(CONFIG_SUPPRESS_INTERRUPTS) && \
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!defined(CONFIG_SUPPRESS_TIMER_INTS)
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/* System Timer Initialization */
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tcvdbg("Opening %s\n", CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH);
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fd = open(CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH, O_RDONLY);
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if (fd < 0)
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{
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tcdbg("open %s failed: %d\n",
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CONFIG_SAM4S_XPLAINED_PRO_SCHED_TIMER_DEVPATH, errno);
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goto errout;
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}
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/* Set the timeout */
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tcvdbg("Interval = %d us.\n", (unsigned long)USEC_PER_TICK);
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ret = ioctl(fd, TCIOC_SETTIMEOUT, (unsigned long)USEC_PER_TICK);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_SETTIMEOUT) failed: %d\n", errno);
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goto errout_with_dev;
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}
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/* install user callback */
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{
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struct timer_sethandler_s tccb;
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tccb.newhandler = systemtick;
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tccb.oldhandler = NULL;
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ret = ioctl(fd, TCIOC_SETHANDLER, (unsigned long)&tccb);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_SETHANDLER) failed: %d\n", errno);
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goto errout_with_dev;
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}
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}
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/* Start the timer */
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tcvdbg("Starting.\n");
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ret = ioctl(fd, TCIOC_START, 0);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_START) failed: %d\n", errno);
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goto errout_with_dev;
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}
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#endif
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#if defined(CONFIG_SCHED_CPULOAD) && defined(CONFIG_SCHED_CPULOAD_EXTCLK)
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/* CPU Load initialization */
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tcvdbg("Opening %s\n", CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH);
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fd = open(CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, O_RDONLY);
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if (fd < 0)
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{
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tcdbg("open %s failed: %d\n",
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CONFIG_SAM4S_XPLAINED_PRO_CPULOAD_TIMER_DEVPATH, errno);
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goto errout;
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}
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/* Set the timeout */
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tcvdbg("Interval = %d us.\n", (unsigned long)1000000 / CONFIG_SCHED_CPULOAD_TICKSPERSEC);
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ret = ioctl(fd, TCIOC_SETTIMEOUT,
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(unsigned long)1000000 / CONFIG_SCHED_CPULOAD_TICKSPERSEC);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_SETTIMEOUT) failed: %d\n", errno);
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goto errout_with_dev;
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}
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/* Install user callback */
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{
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struct timer_sethandler_s tccb;
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tccb.newhandler = calc_cpuload;
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tccb.oldhandler = NULL;
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ret = ioctl(fd, TCIOC_SETHANDLER, (unsigned long)&tccb);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_SETHANDLER) failed: %d\n", errno);
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goto errout_with_dev;
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}
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}
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/* Start the timer */
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tcvdbg("Starting.\n");
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ret = ioctl(fd, TCIOC_START, 0);
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if (ret < 0)
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{
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tcdbg("ioctl(TCIOC_START) failed: %d\n", errno);
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goto errout_with_dev;
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}
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#endif
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goto success;
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errout_with_dev:
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close(fd);
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errout:
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return ERROR;
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success:
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return OK;
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}
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#endif /* CONFIG_TIMER */
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