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changeset 1839:12386c4b2c0c

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* Added watchdog driver for ARM LPC2XXX based on the AT91 code.
author asl
date Sun, 14 Nov 2004 14:11:45 +0000
parents afa0c55e7d89
children cc0f35e15ab8
files packages/devs/watchdog/arm/lpc2xxx/current/ChangeLog packages/devs/watchdog/arm/lpc2xxx/current/cdl/watchdog_lpc2xxx.cdl packages/devs/watchdog/arm/lpc2xxx/current/src/watchdog_lpc2xxx.cxx
diffstat 3 files changed, 366 insertions(+), 0 deletions(-) [+]
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new file mode 100644
--- /dev/null
+++ b/packages/devs/watchdog/arm/lpc2xxx/current/ChangeLog
@@ -0,0 +1,35 @@
+2004-10-04 Jani Monoses <jani@iv.ro>
+
+	* Added watchdog driver for ARM LPC2XXX based on the AT91 code.
+
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+// Copyright (C) 2003 Nick Garnett <nickg@calivar.com>
+// Copyright (C) 2004 eCosCentric Limited 
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
new file mode 100644
--- /dev/null
+++ b/packages/devs/watchdog/arm/lpc2xxx/current/cdl/watchdog_lpc2xxx.cdl
@@ -0,0 +1,132 @@
+# ====================================================================
+#
+#      watchdog_lpc2xxx.cdl
+#
+#      eCos watchdog for ARM LPC2XXX driver configuration data
+#
+# ====================================================================
+#####ECOSGPLCOPYRIGHTBEGIN####
+## -------------------------------------------
+## This file is part of eCos, the Embedded Configurable Operating System.
+## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+## Copyright (C) 2003 Nick Garnett <nickg@calivar.com>
+## Copyright (C) 2004 eCosCentric Limited 
+##
+## eCos is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free
+## Software Foundation; either version 2 or (at your option) any later version.
+##
+## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+## WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+## for more details.
+##
+## You should have received a copy of the GNU General Public License along
+## with eCos; if not, write to the Free Software Foundation, Inc.,
+## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+##
+## As a special exception, if other files instantiate templates or use macros
+## or inline functions from this file, or you compile this file and link it
+## with other works to produce a work based on this file, this file does not
+## by itself cause the resulting work to be covered by the GNU General Public
+## License. However the source code for this file must still be made available
+## in accordance with section (3) of the GNU General Public License.
+##
+## This exception does not invalidate any other reasons why a work based on
+## this file might be covered by the GNU General Public License.
+## -------------------------------------------
+#####ECOSGPLCOPYRIGHTEND####
+# ====================================================================
+######DESCRIPTIONBEGIN####
+#
+# Author(s):      tkoeller
+# Contributors:   tkoeller, nickg
+# Date:           2000-05-05
+#
+#####DESCRIPTIONEND####
+#
+# ====================================================================
+
+cdl_package CYGPKG_DEVICES_WATCHDOG_ARM_LPC2XXX {
+    parent        CYGPKG_IO_WATCHDOG
+    active_if     CYGPKG_IO_WATCHDOG
+    display       "ARM LPC2XXX watchdog driver"
+    requires      CYGPKG_HAL_ARM_LPC2XXX
+    requires      CYGPKG_KERNEL
+    hardware
+    define_header devs_watchdog_arm_lpc2xxx.h
+    compile       watchdog_lpc2xxx.cxx
+    implements    CYGINT_WATCHDOG_HW_IMPLEMENTATIONS
+    active_if     CYGIMP_WATCHDOG_HARDWARE
+    description   "
+      This package uses the watchdog device integrated
+      in the LPC2XXX to execute a predefined action if the
+      application fails to call the reset function for
+      longer than a given timeout interval."
+
+    cdl_option CYGIMP_WATCHDOG_HARDWARE {
+        parent	      CYGPKG_IO_WATCHDOG_IMPLEMENTATION
+        display       "Hardware watchdog"
+        calculated    1
+        implements    CYGINT_WATCHDOG_IMPLEMENTATIONS
+    }
+    
+    cdl_option CYGNUM_DEVS_WATCHDOG_ARM_LPC2XXX_DESIRED_TIMEOUT_MS {
+      	display       	"Desired timeout value"
+	flavor        	data
+	legal_values  	1 to 2047
+	default_value 	100
+	description "
+	    This parameter controls the watchdog timeout interval.
+	    Note that you may not get the exact value requested
+	    here, the timeout interval may have to be adjusted
+	    because of hardware limitations. The actual timeout
+	    used will be the smallest possible value that is not
+	    less than this parameter."
+    }
+    
+    cdl_option CYGSEM_DEVS_WATCHDOG_ARM_LPC2XXX_RESET {
+      	display       "Generate reset on watchdog expiration"
+	flavor	      bool
+	default_value 1
+      	implements    CYGINT_WATCHDOG_RESETS_ON_TIMEOUT
+	description   "
+	  Enabling this option changes the watchdog operation mode
+	  to generate a system reset upon expiration instead of
+	  invoking an application-defined action."
+    }
+
+    cdl_component CYGPKG_DEVICES_WATCHDOG_ARM_LPC2XXX_OPTIONS {
+        display       "LPC2XXX watchdog build options"
+        flavor	      none
+        description   "
+	    Package specific build options including control over
+	    compiler flags used only in building this package,
+	    and details of which tests are built."
+
+        cdl_option CYGPKG_DEVICES_WATCHDOG_ARM_LPC2XXX_CFLAGS_ADD {
+            display   	  "Additional compiler flags"
+            flavor    	  data
+            no_define
+            default_value { "" }
+            description   "
+                This option modifies the set of compiler flags for
+                building the watchdog device. These flags are used in addition
+                to the set of global flags."
+        }
+
+        cdl_option CYGPKG_DEVICES_WATCHDOG_ARM_LPC2XXX_CFLAGS_REMOVE {
+            display   	  "Suppressed compiler flags"
+            flavor    	  data
+            no_define
+            default_value { "" }
+            description   "
+                This option modifies the set of compiler flags for
+                building the watchdog device. These flags are removed from
+                the set of global flags if present."
+        }
+
+    }
+}
+
+# EOF watchdog_lpc2xxx.cdl
new file mode 100644
--- /dev/null
+++ b/packages/devs/watchdog/arm/lpc2xxx/current/src/watchdog_lpc2xxx.cxx
@@ -0,0 +1,199 @@
+//==========================================================================
+//
+//      devs/watchdog/arm/lpc2xxx/watchdog_lpc2xxx.cxx
+//
+//      Watchdog implementation for ARM LPC2XXX CPU
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+// Copyright (C) 2003 Nick Garnett <nickg@calivar.com>
+// Copyright (C) 2004 eCosCentric Limited 
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    jani 
+// Contributors: tkoeller, nickg
+// Date:         2004-10-05
+// Purpose:      Watchdog class implementation
+// Description:  Contains an implementation of the Watchdog class for use
+//               with the Philips LPC2XXX watchdog timer.
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <pkgconf/kernel.h>
+#include <pkgconf/infra.h>
+#include <pkgconf/kernel.h>
+#include <pkgconf/watchdog.h>
+#include <pkgconf/devs_watchdog_arm_lpc2xxx.h>
+
+#include <cyg/infra/cyg_type.h>
+#include <cyg/infra/cyg_ass.h>
+#include <cyg/infra/cyg_trac.h>
+#include <cyg/hal/hal_io.h>
+#include <cyg/hal/hal_diag.h>
+
+#include <cyg/io/watchdog.hxx>
+
+#include <cyg/hal/hal_var_ints.h>
+#if !defined(CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT)
+#include <cyg/kernel/intr.hxx>
+#endif
+
+//==========================================================================
+
+#define TICKS (CYG_HAL_ARM_LPC2XXX_PCLK()/4000 * \
+               CYGNUM_DEVS_WATCHDOG_ARM_LPC2XXX_DESIRED_TIMEOUT_MS)
+
+#define RESOLUTION CYGNUM_DEVS_WATCHDOG_ARM_LPC2XXX_DESIRED_TIMEOUT_MS*1000000
+
+//==========================================================================
+
+#if defined(CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT)
+
+#define MODVAL	(CYGARC_HAL_LPC2XXX_REG_WDMOD_WDEN | \
+                 CYGARC_HAL_LPC2XXX_REG_WDMOD_WDRESET)
+
+void
+Cyg_Watchdog::init_hw(void)
+{
+  CYG_REPORT_FUNCTION();
+  CYG_REPORT_FUNCARGVOID();
+  resolution = RESOLUTION;
+  CYG_REPORT_RETURN();
+}
+
+#else /* defined(CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT) */
+
+//==========================================================================
+
+#define MODVAL	(CYGARC_HAL_LPC2XXX_REG_WDMOD_WDEN | \
+                 CYGARC_HAL_LPC2XXX_REG_WDMOD_WDINT)
+#define INT_PRIO    7
+
+//==========================================================================
+
+static Cyg_Watchdog *wd;
+
+//==========================================================================
+
+static cyg_uint32
+isr(cyg_vector vector, CYG_ADDRWORD data)
+{
+  CYG_REPORT_FUNCTION();
+  CYG_REPORT_FUNCARG2XV(vector, data);
+
+  wd->trigger();
+  Cyg_Interrupt::acknowledge_interrupt(CYGNUM_HAL_INTERRUPT_WD);
+  CYG_REPORT_RETVAL(Cyg_Interrupt::HANDLED);
+  return Cyg_Interrupt::HANDLED;
+}
+
+//==========================================================================
+
+static Cyg_Interrupt wdint(
+    CYGNUM_HAL_INTERRUPT_WD,
+    INT_PRIO,
+    0,
+    isr,
+    NULL
+  );
+
+//==========================================================================
+
+void
+Cyg_Watchdog::init_hw(void)
+{
+  CYG_REPORT_FUNCTION();
+  CYG_REPORT_FUNCARGVOID();
+
+  wd = this;
+  resolution = RESOLUTION;
+  wdint.configure_interrupt(CYGNUM_HAL_INTERRUPT_WD, false, true);
+  wdint.attach();
+  wdint.acknowledge_interrupt(CYGNUM_HAL_INTERRUPT_WD);
+  wdint.unmask_interrupt(CYGNUM_HAL_INTERRUPT_WD);
+  CYG_REPORT_RETURN();
+}
+
+#endif	/* defined(CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT) */
+
+//==========================================================================
+/*
+ * Reset watchdog timer. This needs to be called regularly to prevent
+ * the watchdog from firing.
+ */
+
+void
+Cyg_Watchdog::reset(void)
+{
+  CYG_REPORT_FUNCTION();
+  CYG_REPORT_FUNCARGVOID();
+
+  /* Feed magic values to reset the watchdog. */
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED, 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED_MAGIC1);
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED, 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED_MAGIC2);
+  CYG_REPORT_RETURN();
+}
+
+//==========================================================================
+/*
+ * Start watchdog to generate a hardware reset
+ * or interrupt when expiring.
+ */
+
+void
+Cyg_Watchdog::start(void)
+{
+  CYG_REPORT_FUNCTION();
+  CYG_REPORT_FUNCARGVOID();
+  
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDTC, TICKS);
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDMOD, MODVAL);
+  /* Feed magic values to reset the watchdog. */
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED, 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED_MAGIC1);
+  HAL_WRITE_UINT32(CYGARC_HAL_LPC2XXX_REG_WD_BASE + 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED, 
+                   CYGARC_HAL_LPC2XXX_REG_WDFEED_MAGIC2);
+  CYG_REPORT_RETURN();
+}
+
+//==========================================================================
+// End of watchdog_lpc2xxx.cxx