[rtems commit] bsp/imx: Implement bsp_reset()
Sebastian Huber
sebh at rtems.org
Thu Nov 2 10:26:04 UTC 2017
Module: rtems
Branch: master
Commit: c52a9682c19682f7d0cb4da69efff874f7d7f351
Changeset: http://git.rtems.org/rtems/commit/?id=c52a9682c19682f7d0cb4da69efff874f7d7f351
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Thu Nov 2 11:20:56 2017 +0100
bsp/imx: Implement bsp_reset()
Update #3090.
---
c/src/lib/libbsp/arm/imx/Makefile.am | 1 +
.../imx/include/arm/freescale/imx/imx_wdogreg.h | 62 ++++++++++++++++++++++
c/src/lib/libbsp/arm/imx/preinstall.am | 4 ++
c/src/lib/libbsp/arm/imx/startup/bspreset.c | 13 ++++-
4 files changed, 79 insertions(+), 1 deletion(-)
diff --git a/c/src/lib/libbsp/arm/imx/Makefile.am b/c/src/lib/libbsp/arm/imx/Makefile.am
index c131edc..322df3b 100644
--- a/c/src/lib/libbsp/arm/imx/Makefile.am
+++ b/c/src/lib/libbsp/arm/imx/Makefile.am
@@ -48,6 +48,7 @@ include_arm_freescale_imx_HEADERS += include/arm/freescale/imx/imx_iomuxreg.h
include_arm_freescale_imx_HEADERS += include/arm/freescale/imx/imx_iomuxvar.h
include_arm_freescale_imx_HEADERS += include/arm/freescale/imx/imx_srcreg.h
include_arm_freescale_imx_HEADERS += include/arm/freescale/imx/imx_uartreg.h
+include_arm_freescale_imx_HEADERS += include/arm/freescale/imx/imx_wdogreg.h
###############################################################################
# Data #
diff --git a/c/src/lib/libbsp/arm/imx/include/arm/freescale/imx/imx_wdogreg.h b/c/src/lib/libbsp/arm/imx/include/arm/freescale/imx/imx_wdogreg.h
new file mode 100644
index 0000000..e26dfb2
--- /dev/null
+++ b/c/src/lib/libbsp/arm/imx/include/arm/freescale/imx/imx_wdogreg.h
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2012, 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Oleksandr Rybalko under sponsorship
+ * from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: head/sys/arm/freescale/imx/imx_wdogreg.h 291367 2015-11-26 17:26:52Z ian $
+ */
+
+#define WDOG_CLK_FREQ 32768
+
+#define WDOG_CR_REG 0x00 /* Control Register */
+#define WDOG_CR_WT_MASK 0xff00 /* Count of 0.5 sec */
+#define WDOG_CR_WT_SHIFT 8
+#define WDOG_CR_WDW (1 << 7) /* Suspend WDog */
+#define WDOG_CR_WDA (1 << 5) /* Don't touch ipp_wdog */
+#define WDOG_CR_SRS (1 << 4) /* Don't touch sys_reset */
+#define WDOG_CR_WDT (1 << 3) /* Assert ipp_wdog on tout */
+#define WDOG_CR_WDE (1 << 2) /* WDog Enable */
+#define WDOG_CR_WDBG (1 << 1) /* Suspend when DBG mode */
+#define WDOG_CR_WDZST (1 << 0) /* Suspend when LP mode */
+
+#define WDOG_SR_REG 0x02 /* Service Register */
+#define WDOG_SR_STEP1 0x5555
+#define WDOG_SR_STEP2 0xaaaa
+
+#define WDOG_RSR_REG 0x04 /* Reset Status Register */
+#define WDOG_RSR_POR (1 << 4) /* Due to Power-On Reset */
+#define WDOG_RSR_TOUT (1 << 1) /* Due WDog timeout reset */
+#define WDOG_RSR_SFTW (1 << 0) /* Due Soft reset */
+
+#define WDOG_ICR_REG 0x06 /* Interrupt Control Register */
+#define WDOG_ICR_WIE (1 << 15) /* Enable Interrupt */
+#define WDOG_ICR_WTIS (1 << 14) /* Interrupt has occurred */
+#define WDOG_ICR_WTCT_MASK 0x00ff
+#define WDOG_ICR_WTCT_SHIFT 0 /* Interrupt hold time */
+
+#define WDOG_MCR_REG 0x08 /* Miscellaneous Control Register */
+#define WDOG_MCR_PDE (1 << 0)
+
diff --git a/c/src/lib/libbsp/arm/imx/preinstall.am b/c/src/lib/libbsp/arm/imx/preinstall.am
index a4cff95..ca01976 100644
--- a/c/src/lib/libbsp/arm/imx/preinstall.am
+++ b/c/src/lib/libbsp/arm/imx/preinstall.am
@@ -163,6 +163,10 @@ $(PROJECT_INCLUDE)/arm/freescale/imx/imx_uartreg.h: include/arm/freescale/imx/im
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/arm/freescale/imx/imx_uartreg.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/arm/freescale/imx/imx_uartreg.h
+$(PROJECT_INCLUDE)/arm/freescale/imx/imx_wdogreg.h: include/arm/freescale/imx/imx_wdogreg.h $(PROJECT_INCLUDE)/arm/freescale/imx/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/arm/freescale/imx/imx_wdogreg.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/arm/freescale/imx/imx_wdogreg.h
+
$(PROJECT_LIB)/start.$(OBJEXT): start.$(OBJEXT) $(PROJECT_LIB)/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_LIB)/start.$(OBJEXT)
TMPINSTALL_FILES += $(PROJECT_LIB)/start.$(OBJEXT)
diff --git a/c/src/lib/libbsp/arm/imx/startup/bspreset.c b/c/src/lib/libbsp/arm/imx/startup/bspreset.c
index 5d0ffe7..11eb039 100644
--- a/c/src/lib/libbsp/arm/imx/startup/bspreset.c
+++ b/c/src/lib/libbsp/arm/imx/startup/bspreset.c
@@ -14,7 +14,18 @@
#include <bsp/bootcard.h>
+#include <arm/freescale/imx/imx_wdogreg.h>
+
void bsp_reset(void)
{
- /* TODO */
+ volatile uint16_t *pcr;
+
+ pcr = (volatile uint16_t *) 0x30280000;
+ *pcr &= ~WDOG_CR_SRS;
+ *pcr &= ~WDOG_CR_SRS;
+ *pcr &= ~WDOG_CR_SRS;
+
+ while (true) {
+ /* Wait */
+ }
}
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