convert aruba to the new structure

[openwrt/svn-archive/archive.git] / target / linux / aruba-2.6 / files / arch / mips / aruba / time.c

diff --git a/target/linux/aruba-2.6/files/arch/mips/aruba/time.c b/target/linux/aruba-2.6/files/arch/mips/aruba/time.c
new file mode 100644 (file)
index 0000000..3c63816
--- /dev/null
+++ b/target/linux/aruba-2.6/files/arch/mips/aruba/time.c
@@ -0,0 +1,110 @@
+/**************************************************************************
+ *
+ *  BRIEF MODULE DESCRIPTION
+ *     timer routines for IDT EB434 boards
+ *
+ *  Copyright 2004 IDT Inc. (rischelp@idt.com)
+ *         
+ *  This program 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 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``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  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.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ **************************************************************************
+ * May 2004 rkt, neb
+ *
+ * Initial Release
+ *
+ * 
+ *
+ **************************************************************************
+ */
+
+#include <linux/autoconf.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/mc146818rtc.h>
+#include <linux/irq.h>
+#include <linux/timex.h>
+
+#include <linux/param.h>
+#include <asm/mipsregs.h>
+#include <asm/ptrace.h>
+#include <asm/time.h>
+#include <asm/hardirq.h>
+
+#include <asm/mipsregs.h>
+#include <asm/ptrace.h>
+#include <asm/debug.h>
+#include <asm/time.h>
+
+#include <asm/idt-boards/rc32434/rc32434.h>
+
+static unsigned long r4k_offset;       /* Amount to incr compare reg each time */
+static unsigned long r4k_cur;  /* What counter should be at next timer irq */
+
+extern unsigned int idt_cpu_freq;
+
+static unsigned long __init cal_r4koff(void)
+{
+       mips_hpt_frequency = idt_cpu_freq * IDT_CLOCK_MULT / 2;
+       return (mips_hpt_frequency / HZ);
+}
+
+void __init aruba_time_init(void)
+{
+       unsigned int est_freq, flags;
+       local_irq_save(flags);
+
+       printk("calculating r4koff... ");
+       r4k_offset = cal_r4koff();
+       printk("%08lx(%d)\n", r4k_offset, (int)r4k_offset);
+
+       est_freq = 2 * r4k_offset * HZ;
+       est_freq += 5000;       /* round */
+       est_freq -= est_freq % 10000;
+       printk("CPU frequency %d.%02d MHz\n", est_freq / 1000000,
+              (est_freq % 1000000) * 100 / 1000000);
+       local_irq_restore(flags);
+
+}
+
+void __init plat_timer_setup(struct irqaction *irq)
+{
+       /* we are using the cpu counter for timer interrupts */
+       setup_irq(MIPS_CPU_TIMER_IRQ, irq);
+
+       /* to generate the first timer interrupt */
+       r4k_cur = (read_c0_count() + r4k_offset);
+       write_c0_compare(r4k_cur);
+
+}
+
+asmlinkage void aruba_timer_interrupt(struct pt_regs *regs)
+{
+       int irq = MIPS_CPU_TIMER_IRQ;
+
+       irq_enter();
+       kstat_this_cpu.irqs[irq]++;
+
+       timer_interrupt(irq, NULL);
+       irq_exit();
+}