sh: Update sh timer function
Change to write/readX function and fix timer problem.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/lib_sh/Makefile b/lib_sh/Makefile
index 4034381..f7c6479 100644
--- a/lib_sh/Makefile
+++ b/lib_sh/Makefile
@@ -26,7 +26,11 @@
COBJS-y += board.o
COBJS-y += bootm.o
-# COBJS-y += time.o
+ifeq ($(CONFIG_SH2),y)
+COBJS-y += time_sh2.o
+else
+COBJS-y += time.o
+endif
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
diff --git a/lib_sh/time.c b/lib_sh/time.c
index e637e95..2bd7715 100644
--- a/lib_sh/time.c
+++ b/lib_sh/time.c
@@ -1,6 +1,9 @@
/*
- * Copyright (c) 2007
- * Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ * (C) Copyright 2007-2008
+ * Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -23,50 +26,96 @@
#include <common.h>
#include <asm/processor.h>
+#include <asm/io.h>
+
+#define TMU_MAX_COUNTER (~0UL)
+static int clk_adj = 1;
static void tmu_timer_start (unsigned int timer)
{
if (timer > 2)
return;
+ writeb(readb(TSTR) | (1 << timer), TSTR);
+}
- *((volatile unsigned char *) TSTR0) |= (1 << timer);
+static void tmu_timer_stop (unsigned int timer)
+{
+ if (timer > 2)
+ return;
+ writeb(readb(TSTR) & ~(1 << timer), TSTR);
}
int timer_init (void)
{
- *(volatile u16 *)TCR0 = 0;
+ /* Divide clock by TMU_CLK_DIVIDER */
+ u16 bit = 0;
+ switch( TMU_CLK_DIVIDER ){
+ case 4:
+ bit = 0;
+ break;
+ case 16:
+ bit = 1;
+ break;
+ case 64: bit = 2;
+ break;
+ case 256:
+ bit = 3;
+ break;
+ case 1024:
+ bit = 4;
+ break;
+ default:
+ bit = 0;
+ break;
+ }
+ writew(readw(TCR0) | bit, TCR0);
- tmu_timer_start (0);
+ /* Clock adjustment calc */
+ clk_adj = (int)(1.0/((1.0/CONFIG_SYS_HZ)*1000000));
+ if (clk_adj < 1)
+ clk_adj = 1;
+
+ tmu_timer_stop(0);
+ tmu_timer_start(0);
+
return 0;
}
unsigned long long get_ticks (void)
{
- return (0 - *((volatile unsigned int *) TCNT0));
+ return 0 - readl(TCNT0);
}
-unsigned long get_timer (unsigned long base)
+static unsigned long get_usec (void)
{
- return ((0 - *((volatile unsigned int *) TCNT0)) - base);
+ return (0 - readl(TCNT0));
}
-void set_timer (unsigned long t)
+void udelay (unsigned long usec)
{
- *((volatile unsigned int *) TCNT0) = (0 - t);
+ unsigned int start = get_usec();
+ unsigned int end = start + (usec * clk_adj);
+
+ while (get_usec() < end)
+ continue;
}
-void reset_timer (void)
+unsigned long get_timer (unsigned long base)
{
- set_timer (0);
+ /* return msec */
+ return ((get_usec()/clk_adj)/1000) - base;
}
-void udelay (unsigned long usec)
+void set_timer (unsigned long t)
{
- unsigned int start = get_timer (0);
- unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000));
+ writel((0 - t), TCNT0);
+}
- while (get_timer (0) < end)
- continue;
+void reset_timer (void)
+{
+ tmu_timer_stop(0);
+ set_timer (0);
+ tmu_timer_start(0);
}
unsigned long get_tbclk (void)
diff --git a/lib_sh/time_sh2.c b/lib_sh/time_sh2.c
new file mode 100644
index 0000000..fcbb921
--- /dev/null
+++ b/lib_sh/time_sh2.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2007,2008 Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+
+#define CMT_CMCSR_INIT 0x0001 /* PCLK/32 */
+#define CMT_CMCSR_CALIB 0x0000
+#define CMT_MAX_COUNTER (0xFFFFFFFF)
+#define CMT_TIMER_RESET (0xFFFF)
+
+static vu_long cmt0_timer;
+
+static void cmt_timer_start(unsigned int timer)
+{
+ writew(readw(CMSTR) | 0x01, CMSTR);
+}
+
+static void cmt_timer_stop(unsigned int timer)
+{
+ writew(readw(CMSTR) & ~0x01, CMSTR);
+}
+
+int timer_init(void)
+{
+ cmt0_timer = 0;
+ /* Divide clock by 32 */
+ readw(CMCSR_0);
+ writew(CMT_CMCSR_INIT, CMCSR_0);
+
+ /* User Device 0 only */
+ cmt_timer_stop(0);
+ set_timer(CMT_TIMER_RESET);
+ cmt_timer_start(0);
+
+ return 0;
+}
+
+unsigned long long get_ticks(void)
+{
+ return cmt0_timer;
+}
+
+static vu_long cmcnt;
+ulong get_timer(ulong base)
+{
+ ulong data = readw(CMCNT_0);
+
+ if (data >= cmcnt)
+ cmcnt = data - cmcnt;
+ else
+ cmcnt = (CMT_TIMER_RESET - cmcnt) + data;
+
+ if ((cmt0_timer + cmcnt) > CMT_MAX_COUNTER)
+ cmt0_timer = ((cmt0_timer + cmcnt) - CMT_MAX_COUNTER);
+ else
+ cmt0_timer += cmcnt;
+
+ cmcnt = data;
+ return cmt0_timer - base;
+}
+
+void set_timer(ulong t)
+{
+ writew((u16) t, CMCOR_0);
+}
+
+void reset_timer(void)
+{
+ cmt_timer_stop(0);
+ set_timer(CMT_TIMER_RESET);
+ cmt0_timer = 0;
+ cmt_timer_start(0);
+}
+
+void udelay(unsigned long usec)
+{
+ unsigned int start = get_timer(0);
+
+ while (get_timer((ulong) start) < (usec * (CONFIG_SYS_HZ / 1000000)))
+ continue;
+}
+
+unsigned long get_tbclk(void)
+{
+ return CONFIG_SYS_HZ;
+}