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* lpc2xxx: driver for on-chip RTC unit
author asl
date Sat, 12 Jul 2008 15:54:31 +0000
parents 7b16b2d61ef3
children b5595b55da6a
files packages/devs/wallclock/arm/lpc2xxx/current/ChangeLog packages/devs/wallclock/arm/lpc2xxx/current/cdl/lpc2xxx_wallclock.cdl packages/devs/wallclock/arm/lpc2xxx/current/src/lpc2xxx_wallclock.cxx
diffstat 3 files changed, 284 insertions(+), 0 deletions(-) [+]
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new file mode 100644
--- /dev/null
+++ b/packages/devs/wallclock/arm/lpc2xxx/current/ChangeLog
@@ -0,0 +1,37 @@
+2007-07-12  Hans Rosenfeld  <rosenfeld@grumpf.hope-2000.org>
+
+	* lpc2xxx: driver for on-chip RTC unit
+
+//===========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Red Hat, Inc.
+//
+// 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/wallclock/arm/lpc2xxx/current/cdl/lpc2xxx_wallclock.cdl
@@ -0,0 +1,86 @@
+# ====================================================================
+#
+#      lpc2xxx_wallclock.cdl
+#
+#      eCos configuration data for LPC2xxx internal RTC
+#
+# ====================================================================
+#####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 Gary Thomas
+## Copyright (C) 2004 eCosCentric Ltd
+##
+## 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):      Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
+# Contributors:   jskov
+# Date:           2007-06-19
+#
+#####DESCRIPTIONEND####
+#
+# ====================================================================
+
+cdl_package CYGPKG_DEVICES_WALLCLOCK_ARM_LPC2XXX {
+    display       "LPC2xxx Real-time clock"
+    description   "RTC driver for the LPC2xxx controller"
+
+    parent        CYGPKG_IO_WALLCLOCK
+    active_if     CYGPKG_IO_WALLCLOCK
+    active_if     CYGPKG_HAL_ARM_LPC2XXX
+
+    requires      { CYGHWR_HAL_ARM_LPC2XXX_IDLE_PWRSAVE == 0 }
+    compile       lpc2xxx_wallclock.cxx
+
+    implements    CYGINT_WALLCLOCK_HW_IMPLEMENTATIONS
+    active_if     CYGIMP_WALLCLOCK_HARDWARE
+    implements    CYGINT_WALLCLOCK_SET_GET_MODE_SUPPORTED
+
+    cdl_option CYGIMP_WALLCLOCK_HARDWARE {
+        parent        CYGPKG_IO_WALLCLOCK_IMPLEMENTATION
+        display       "Hardware wallclock"
+        default_value 1
+        implements    CYGINT_WALLCLOCK_IMPLEMENTATIONS
+    }
+
+    cdl_option CYGNUM_HAL_ARM_LPC2XXX_RTCDEV_PREINT {
+        display    "RTC prescaler integer portion"
+        flavor     data
+        calculated { ((CYGNUM_HAL_ARM_LPC2XXX_CLOCK_SPEED / 
+                       CYGNUM_HAL_ARM_LPC2XXX_VPBDIV) / 32768) - 1 }
+    }
+
+    cdl_option CYGNUM_HAL_ARM_LPC2XXX_RTCDEV_PREFRAC {
+        display    "RTC prescaler fractional portion"
+        flavor     data
+        calculated { ((CYGNUM_HAL_ARM_LPC2XXX_CLOCK_SPEED / 
+                       CYGNUM_HAL_ARM_LPC2XXX_VPBDIV) -
+                      ((CYGNUM_HAL_ARM_LPC2XXX_RTCDEV_PREINT + 1) * 32768)) }
+    }
+}
new file mode 100644
--- /dev/null
+++ b/packages/devs/wallclock/arm/lpc2xxx/current/src/lpc2xxx_wallclock.cxx
@@ -0,0 +1,161 @@
+//==========================================================================
+//
+//      lpc2xxx_wallclock.cxx
+//
+//      Wallclock implementation for LPC2xxx
+//
+//==========================================================================
+//####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 Gary Thomas
+// Copyright (C) 2004 eCosCentric Ltd
+//
+// 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):     Hans Rosenfeld <rosenfeld@grumpf.hope-2000.org>
+// Contributors:  
+// Date:          2007-06-19
+// Purpose:       Wallclock driver for LPC2xxx
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <pkgconf/hal.h>
+#include <pkgconf/wallclock.h>
+#include <pkgconf/devices_wallclock_arm_lpc2xxx.h>
+
+#include <cyg/hal/hal_io.h>
+#include <cyg/hal/hal_intr.h>
+#include <cyg/infra/cyg_type.h>
+
+#include <cyg/io/wallclock.hxx>
+#include <cyg/io/wallclock/wallclock.inl>
+
+/*
+ * I don't like to write LOTS OF CAPITALIZED TEXT.
+ * This code is intended for LPC2xxx processors _only_, so there is nothing
+ * wrong with accessing this device directly without using the HAL macros.
+ */
+
+struct time {
+  volatile cyg_uint32 sec;
+  volatile cyg_uint32 min;
+  volatile cyg_uint32 hour;
+  volatile cyg_uint32 dom;
+  volatile cyg_uint32 dow;
+  volatile cyg_uint32 doy;
+  volatile cyg_uint32 month;
+  volatile cyg_uint32 year;
+};
+
+struct rtcdev {
+  volatile cyg_uint32 ilr;
+  volatile cyg_uint32 ctc;
+  volatile cyg_uint32 ccr;
+  volatile cyg_uint32 ciir;
+  volatile cyg_uint32 amr;
+  volatile cyg_uint32 ctime[3];
+  struct time time;
+  cyg_uint32 dummy[8];
+  struct time alarm;
+  volatile cyg_uint32 preint;
+  volatile cyg_uint32 prefrac;
+};
+
+static struct rtcdev * const rtc = 
+  (struct rtcdev *) CYGARC_HAL_LPC2XXX_REG_RTC_BASE;
+
+void
+Cyg_WallClock::init_hw_seconds(void)
+{
+  /* halt clock, disable interrupts, disable alarm */
+  rtc->ccr  = 0x2;
+  rtc->ciir = 0x0;
+  rtc->amr  = 0xf;
+  
+  /* initialize prescaler */
+  rtc->preint  = CYGNUM_HAL_ARM_LPC2XXX_RTCDEV_PREINT;
+  rtc->prefrac = CYGNUM_HAL_ARM_LPC2XXX_RTCDEV_PREFRAC;
+  
+#ifndef CYGSEM_WALLCLOCK_SET_GET_MODE
+  /* reset time to the Unix Epoch */
+  rtc->time.year  = 1970;
+  rtc->time.month = 1;
+  rtc->time.dom   = 1;
+  rtc->time.doy   = 1;
+  rtc->time.dow   = 4;
+  rtc->time.hour  = 0;
+  rtc->time.min   = 0;
+  rtc->time.sec   = 0;
+#endif
+  
+  /* reset alarm */
+  rtc->alarm.year = rtc->alarm.month = rtc->alarm.dom = rtc->alarm.doy =
+    rtc->alarm.dow = rtc->alarm.hour = rtc->alarm.min = 
+    rtc->alarm.sec = 0;
+  
+  /* start clock */
+  rtc->ccr = 0x1;
+}
+
+cyg_uint32
+Cyg_WallClock::get_hw_seconds(void)
+{
+  return _simple_mktime(rtc->time.year,
+                        rtc->time.month,
+                        rtc->time.dom,
+                        rtc->time.hour,
+                        rtc->time.min,
+                        rtc->time.sec);
+}
+
+#ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
+void
+Cyg_WallClock::set_hw_seconds(cyg_uint32 secs)
+{
+  cyg_uint32 year, month, dom, hour, min, sec;
+  
+  /* halt clock, reset counter */
+  rtc->ccr = 0x2;
+  
+  /* set time */
+  _simple_mkdate(secs, &year, &month, &dom, &hour, &min, &sec);
+  rtc->time.year  = year;
+  rtc->time.month = month;
+  rtc->time.dom   = dom;
+  rtc->time.hour  = hour;
+  rtc->time.min   = min;
+  rtc->time.sec   = sec;
+  
+  /* restart clock */
+  rtc->ccr = 0x1;
+}
+#endif