1 files changed, 113 insertions, 0 deletions
diff --git a/bsps/m68k/mcf5206elite/dev/ckinit.c b/bsps/m68k/mcf5206elite/dev/ckinit.c
new file mode 100644
index 0000000000..80962a1d58
--- /dev/null
+++ b/bsps/m68k/mcf5206elite/dev/ckinit.c
@@ -0,0 +1,113 @@
+/*
+ *  Clock Driver for MCF5206eLITE board
+ *
+ *  This driver initailizes timer1 on the MCF5206E as the
+ *  main system clock
+ */
+
+/*
+ *  Author: Victor V. Vengerov <vvv@oktet.ru>
+ *
+ *  Based on work:
+ *    David Fiddes, D.J@fiddes.surfaid.org
+ *    http://www.calm.hw.ac.uk/davidf/coldfire/
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#include <stdlib.h>
+#include <bsp.h>
+#include <rtems/libio.h>
+#include <rtems/clockdrv.h>
+#include "mcf5206/mcf5206e.h"
+
+/*
+ * Clock_driver_ticks is a monotonically increasing counter of the
+ * number of clock ticks since the driver was initialized.
+ */
+volatile uint32_t   Clock_driver_ticks;
+
+rtems_isr (*rtems_clock_hook)(rtems_vector_number) = NULL;
+
+static rtems_isr
+Clock_isr (rtems_vector_number vector)
+{
+  /* Clear pending interrupt... */
+  *MCF5206E_TER(MBAR,1) = MCF5206E_TER_REF | MCF5206E_TER_CAP;
+
+  /* Announce the clock tick */
+  Clock_driver_ticks++;
+  rtems_clock_tick();
+  if (rtems_clock_hook != NULL)
+      rtems_clock_hook(vector);
+}
+
+void
+Clock_exit(void)
+{
+  /* disable all timer1 interrupts */
+  *MCF5206E_IMR(MBAR) |= MCF5206E_INTR_BIT(MCF5206E_INTR_TIMER_1);
+
+  /* reset timer1 */
+  *MCF5206E_TMR(MBAR,1) = MCF5206E_TMR_ICLK_STOP;
+
+  /* clear pending */
+  *MCF5206E_TER(MBAR,1) = MCF5206E_TER_REF | MCF5206E_TER_CAP;
+}
+
+
+static void
+Install_clock(rtems_isr_entry clock_isr)
+{
+  Clock_driver_ticks = 0;
+
+  /* Configure timer1 interrupts */
+  *MCF5206E_ICR(MBAR,MCF5206E_INTR_TIMER_1) =
+      MCF5206E_ICR_AVEC |
+      ((BSP_INTLVL_TIMER1 << MCF5206E_ICR_IL_S) & MCF5206E_ICR_IL) |
+      ((BSP_INTPRIO_TIMER1 << MCF5206E_ICR_IP_S) & MCF5206E_ICR_IP);
+
+  /* Register the interrupt handler */
+  set_vector(clock_isr, BSP_INTVEC_TIMER1, 1);
+
+  /* Reset timer 1 */
+  *MCF5206E_TMR(MBAR, 1) = MCF5206E_TMR_RST;
+  *MCF5206E_TMR(MBAR, 1) = MCF5206E_TMR_ICLK_STOP;
+  *MCF5206E_TMR(MBAR, 1) = MCF5206E_TMR_RST;
+  *MCF5206E_TCN(MBAR, 1) = 0; /* Reset counter */
+  *MCF5206E_TER(MBAR, 1) = MCF5206E_TER_REF | MCF5206E_TER_CAP;
+
+  /* Set Timer 1 prescaler so that it counts in microseconds */
+  *MCF5206E_TMR(MBAR, 1) =
+      (((BSP_SYSTEM_FREQUENCY/1000000 - 1) << MCF5206E_TMR_PS_S) &
+       MCF5206E_TMR_PS) |
+      MCF5206E_TMR_CE_NONE | MCF5206E_TMR_ORI | MCF5206E_TMR_FRR |
+      MCF5206E_TMR_RST;
+
+  /* Set the timer timeout value from the BSP config */
+  *MCF5206E_TRR(MBAR, 1) = rtems_configuration_get_microseconds_per_tick() - 1;
+
+  /* Feed system frequency to the timer */
+  *MCF5206E_TMR(MBAR, 1) |= MCF5206E_TMR_ICLK_MSCLK;
+
+  /* Enable timer 1 interrupts */
+  *MCF5206E_IMR(MBAR) &= ~MCF5206E_INTR_BIT(MCF5206E_INTR_TIMER_1);
+
+  /* Register the driver exit procedure so we can shutdown */
+  atexit(Clock_exit);
+}
+
+rtems_device_driver
+Clock_initialize(rtems_device_major_number major,
+                 rtems_device_minor_number minor,
+                 void *pargp)
+{
+  Install_clock (Clock_isr);
+
+  return RTEMS_SUCCESSFUL;
+}