[U-Boot] [PATCH] arm:samsung:timer: Move common timer related code to ./samsung-common/ directory
Lukasz Majewski
l.majewski at majess.pl
Sun Jul 21 23:51:55 CEST 2013
Common Samsung's timer/pwm code has been moved one level up - to
./samsung-common directory.
This would allow other - non S5P based targets to reuse it.
As a side effect, duplicated header files have been removed.
Signed-off-by: Lukasz Majewski <l.majewski at majess.pl>
Cc: Minkyu Kang <mk7.kang at samsung.com>
---
Makefile | 7 +-
arch/arm/cpu/armv7/s5p-common/Makefile | 2 -
arch/arm/cpu/armv7/s5p-common/pwm.c | 187 ----------------------------
arch/arm/cpu/armv7/s5p-common/timer.c | 148 -----------------------
arch/arm/cpu/samsung-common/Makefile | 48 ++++++++
arch/arm/cpu/samsung-common/pwm.c | 188 +++++++++++++++++++++++++++++
arch/arm/cpu/samsung-common/timer.c | 149 +++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/pwm.h | 68 -----------
arch/arm/include/asm/arch-s5pc1xx/pwm.h | 68 -----------
arch/arm/include/asm/samsung-common/pwm.h | 68 +++++++++++
10 files changed, 457 insertions(+), 476 deletions(-)
delete mode 100644 arch/arm/cpu/armv7/s5p-common/pwm.c
delete mode 100644 arch/arm/cpu/armv7/s5p-common/timer.c
create mode 100644 arch/arm/cpu/samsung-common/Makefile
create mode 100644 arch/arm/cpu/samsung-common/pwm.c
create mode 100644 arch/arm/cpu/samsung-common/timer.c
delete mode 100644 arch/arm/include/asm/arch-exynos/pwm.h
delete mode 100644 arch/arm/include/asm/arch-s5pc1xx/pwm.h
create mode 100644 arch/arm/include/asm/samsung-common/pwm.h
diff --git a/Makefile b/Makefile
index f100b83..d53ccd2 100644
--- a/Makefile
+++ b/Makefile
@@ -346,12 +346,13 @@ ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35 mxs vf610))
LIBS-y += arch/$(ARCH)/imx-common/libimx-common.o
endif
-ifeq ($(SOC),s5pc1xx)
+ifeq ($(CPU),armv7)
+LIBS-y += arch/$(ARCH)/cpu/samsung-common/libsamsung-common.o
+ifneq (,$(filter $(SOC), exynos s5pc1xx))
LIBS-y += $(CPUDIR)/s5p-common/libs5p-common.o
endif
-ifeq ($(SOC),exynos)
-LIBS-y += $(CPUDIR)/s5p-common/libs5p-common.o
endif
+
ifneq ($(CONFIG_TEGRA),)
LIBS-y += arch/$(ARCH)/cpu/$(SOC)-common/lib$(SOC)-common.o
LIBS-y += arch/$(ARCH)/cpu/tegra-common/libcputegra-common.o
diff --git a/arch/arm/cpu/armv7/s5p-common/Makefile b/arch/arm/cpu/armv7/s5p-common/Makefile
index 0c38bd0..e48ecd7 100644
--- a/arch/arm/cpu/armv7/s5p-common/Makefile
+++ b/arch/arm/cpu/armv7/s5p-common/Makefile
@@ -27,9 +27,7 @@ LIB = $(obj)libs5p-common.o
COBJS-y += cpu_info.o
ifndef CONFIG_SPL_BUILD
-COBJS-y += timer.o
COBJS-y += sromc.o
-COBJS-$(CONFIG_PWM) += pwm.o
endif
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
diff --git a/arch/arm/cpu/armv7/s5p-common/pwm.c b/arch/arm/cpu/armv7/s5p-common/pwm.c
deleted file mode 100644
index 6f401b8..0000000
--- a/arch/arm/cpu/armv7/s5p-common/pwm.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * Copyright (C) 2011 Samsung Electronics
- *
- * Donghwa Lee <dh09.lee at samsung.com>
- *
- * 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 <errno.h>
-#include <pwm.h>
-#include <asm/io.h>
-#include <asm/arch/pwm.h>
-#include <asm/arch/clk.h>
-
-int pwm_enable(int pwm_id)
-{
- const struct s5p_timer *pwm =
- (struct s5p_timer *)samsung_get_base_timer();
- unsigned long tcon;
-
- tcon = readl(&pwm->tcon);
- tcon |= TCON_START(pwm_id);
-
- writel(tcon, &pwm->tcon);
-
- return 0;
-}
-
-void pwm_disable(int pwm_id)
-{
- const struct s5p_timer *pwm =
- (struct s5p_timer *)samsung_get_base_timer();
- unsigned long tcon;
-
- tcon = readl(&pwm->tcon);
- tcon &= ~TCON_START(pwm_id);
-
- writel(tcon, &pwm->tcon);
-}
-
-static unsigned long pwm_calc_tin(int pwm_id, unsigned long freq)
-{
- unsigned long tin_parent_rate;
- unsigned int div;
-
- tin_parent_rate = get_pwm_clk();
-
- for (div = 2; div <= 16; div *= 2) {
- if ((tin_parent_rate / (div << 16)) < freq)
- return tin_parent_rate / div;
- }
-
- return tin_parent_rate / 16;
-}
-
-#define NS_IN_SEC 1000000000UL
-
-int pwm_config(int pwm_id, int duty_ns, int period_ns)
-{
- const struct s5p_timer *pwm =
- (struct s5p_timer *)samsung_get_base_timer();
- unsigned int offset;
- unsigned long tin_rate;
- unsigned long tin_ns;
- unsigned long frequency;
- unsigned long tcon;
- unsigned long tcnt;
- unsigned long tcmp;
-
- /*
- * We currently avoid using 64bit arithmetic by using the
- * fact that anything faster than 1GHz is easily representable
- * by 32bits.
- */
- if (period_ns > NS_IN_SEC || duty_ns > NS_IN_SEC || period_ns == 0)
- return -ERANGE;
-
- if (duty_ns > period_ns)
- return -EINVAL;
-
- frequency = NS_IN_SEC / period_ns;
-
- /* Check to see if we are changing the clock rate of the PWM */
- tin_rate = pwm_calc_tin(pwm_id, frequency);
-
- tin_ns = NS_IN_SEC / tin_rate;
- tcnt = period_ns / tin_ns;
-
- /* Note, counters count down */
- tcmp = duty_ns / tin_ns;
- tcmp = tcnt - tcmp;
-
- /* Update the PWM register block. */
- offset = pwm_id * 3;
- if (pwm_id < 4) {
- writel(tcnt, &pwm->tcntb0 + offset);
- writel(tcmp, &pwm->tcmpb0 + offset);
- }
-
- tcon = readl(&pwm->tcon);
- tcon |= TCON_UPDATE(pwm_id);
- if (pwm_id < 4)
- tcon |= TCON_AUTO_RELOAD(pwm_id);
- else
- tcon |= TCON4_AUTO_RELOAD;
- writel(tcon, &pwm->tcon);
-
- tcon &= ~TCON_UPDATE(pwm_id);
- writel(tcon, &pwm->tcon);
-
- return 0;
-}
-
-int pwm_init(int pwm_id, int div, int invert)
-{
- u32 val;
- const struct s5p_timer *pwm =
- (struct s5p_timer *)samsung_get_base_timer();
- unsigned long ticks_per_period;
- unsigned int offset, prescaler;
-
- /*
- * Timer Freq(HZ) =
- * PWM_CLK / { (prescaler_value + 1) * (divider_value) }
- */
-
- val = readl(&pwm->tcfg0);
- if (pwm_id < 2) {
- prescaler = PRESCALER_0;
- val &= ~0xff;
- val |= (prescaler & 0xff);
- } else {
- prescaler = PRESCALER_1;
- val &= ~(0xff << 8);
- val |= (prescaler & 0xff) << 8;
- }
- writel(val, &pwm->tcfg0);
- val = readl(&pwm->tcfg1);
- val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));
- val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);
- writel(val, &pwm->tcfg1);
-
- if (pwm_id == 4) {
- /*
- * TODO(sjg): Use this as a countdown timer for now. We count
- * down from the maximum value to 0, then reset.
- */
- ticks_per_period = -1UL;
- } else {
- const unsigned long pwm_hz = 1000;
- unsigned long timer_rate_hz = get_pwm_clk() /
- ((prescaler + 1) * (1 << div));
-
- ticks_per_period = timer_rate_hz / pwm_hz;
- }
-
- /* set count value */
- offset = pwm_id * 3;
-
- writel(ticks_per_period, &pwm->tcntb0 + offset);
-
- val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));
- if (invert && (pwm_id < 4))
- val |= TCON_INVERTER(pwm_id);
- writel(val, &pwm->tcon);
-
- pwm_enable(pwm_id);
-
- return 0;
-}
diff --git a/arch/arm/cpu/armv7/s5p-common/timer.c b/arch/arm/cpu/armv7/s5p-common/timer.c
deleted file mode 100644
index 637593c..0000000
--- a/arch/arm/cpu/armv7/s5p-common/timer.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Copyright (C) 2009 Samsung Electronics
- * Heungjun Kim <riverful.kim at samsung.com>
- * Inki Dae <inki.dae at samsung.com>
- * Minkyu Kang <mk7.kang at samsung.com>
- *
- * 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 <div64.h>
-#include <asm/io.h>
-#include <asm/arch/pwm.h>
-#include <asm/arch/clk.h>
-#include <pwm.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-unsigned long get_current_tick(void);
-
-/* macro to read the 16 bit timer */
-static inline struct s5p_timer *s5p_get_base_timer(void)
-{
- return (struct s5p_timer *)samsung_get_base_timer();
-}
-
-/**
- * Read the countdown timer.
- *
- * This operates at 1MHz and counts downwards. It will wrap about every
- * hour (2^32 microseconds).
- *
- * @return current value of timer
- */
-static unsigned long timer_get_us_down(void)
-{
- struct s5p_timer *const timer = s5p_get_base_timer();
-
- return readl(&timer->tcnto4);
-}
-
-int timer_init(void)
-{
- /* PWM Timer 4 */
- pwm_init(4, MUX_DIV_4, 0);
- pwm_config(4, 100000, 100000);
- pwm_enable(4);
-
- /* Use this as the current monotonic time in us */
- gd->arch.timer_reset_value = 0;
-
- /* Use this as the last timer value we saw */
- gd->arch.lastinc = timer_get_us_down();
- reset_timer_masked();
-
- return 0;
-}
-
-/*
- * timer without interrupts
- */
-unsigned long get_timer(unsigned long base)
-{
- unsigned long long time_ms;
-
- ulong now = timer_get_us_down();
-
- /*
- * Increment the time by the amount elapsed since the last read.
- * The timer may have wrapped around, but it makes no difference to
- * our arithmetic here.
- */
- gd->arch.timer_reset_value += gd->arch.lastinc - now;
- gd->arch.lastinc = now;
-
- /* Divide by 1000 to convert from us to ms */
- time_ms = gd->arch.timer_reset_value;
- do_div(time_ms, 1000);
- return time_ms - base;
-}
-
-unsigned long __attribute__((no_instrument_function)) timer_get_us(void)
-{
- static unsigned long base_time_us;
-
- struct s5p_timer *const timer =
- (struct s5p_timer *)samsung_get_base_timer();
- unsigned long now_downward_us = readl(&timer->tcnto4);
-
- if (!base_time_us)
- base_time_us = now_downward_us;
-
- /* Note that this timer counts downward. */
- return base_time_us - now_downward_us;
-}
-
-/* delay x useconds */
-void __udelay(unsigned long usec)
-{
- unsigned long count_value;
-
- count_value = timer_get_us_down();
- while ((int)(count_value - timer_get_us_down()) < (int)usec)
- ;
-}
-
-void reset_timer_masked(void)
-{
- struct s5p_timer *const timer = s5p_get_base_timer();
-
- /* reset time */
- gd->arch.lastinc = readl(&timer->tcnto4);
- gd->arch.tbl = 0;
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
- return get_timer(0);
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
-unsigned long get_tbclk(void)
-{
- return CONFIG_SYS_HZ;
-}
diff --git a/arch/arm/cpu/samsung-common/Makefile b/arch/arm/cpu/samsung-common/Makefile
new file mode 100644
index 0000000..cae22e8
--- /dev/null
+++ b/arch/arm/cpu/samsung-common/Makefile
@@ -0,0 +1,48 @@
+#
+# Copyright (C) 2009 Samsung Electronics
+# Minkyu Kang <mk7.kang at samsung.com>
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB = $(obj)libsamsung-common.o
+
+ifndef CONFIG_SPL_BUILD
+COBJS-$(CONFIG_PWM) += pwm.o
+COBJS-y += timer.o
+endif
+
+SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS-y) $(SOBJS))
+
+all: $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/samsung-common/pwm.c b/arch/arm/cpu/samsung-common/pwm.c
new file mode 100644
index 0000000..6a6057f
--- /dev/null
+++ b/arch/arm/cpu/samsung-common/pwm.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ *
+ * Donghwa Lee <dh09.lee at samsung.com>
+ *
+ * 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 <errno.h>
+#include <pwm.h>
+#include <asm/io.h>
+#include <asm/samsung-common/pwm.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/cpu.h>
+
+int pwm_enable(int pwm_id)
+{
+ const struct s5p_timer *pwm =
+ (struct s5p_timer *)samsung_get_base_timer();
+ unsigned long tcon;
+
+ tcon = readl(&pwm->tcon);
+ tcon |= TCON_START(pwm_id);
+
+ writel(tcon, &pwm->tcon);
+
+ return 0;
+}
+
+void pwm_disable(int pwm_id)
+{
+ const struct s5p_timer *pwm =
+ (struct s5p_timer *)samsung_get_base_timer();
+ unsigned long tcon;
+
+ tcon = readl(&pwm->tcon);
+ tcon &= ~TCON_START(pwm_id);
+
+ writel(tcon, &pwm->tcon);
+}
+
+static unsigned long pwm_calc_tin(int pwm_id, unsigned long freq)
+{
+ unsigned long tin_parent_rate;
+ unsigned int div;
+
+ tin_parent_rate = get_pwm_clk();
+
+ for (div = 2; div <= 16; div *= 2) {
+ if ((tin_parent_rate / (div << 16)) < freq)
+ return tin_parent_rate / div;
+ }
+
+ return tin_parent_rate / 16;
+}
+
+#define NS_IN_SEC 1000000000UL
+
+int pwm_config(int pwm_id, int duty_ns, int period_ns)
+{
+ const struct s5p_timer *pwm =
+ (struct s5p_timer *)samsung_get_base_timer();
+ unsigned int offset;
+ unsigned long tin_rate;
+ unsigned long tin_ns;
+ unsigned long frequency;
+ unsigned long tcon;
+ unsigned long tcnt;
+ unsigned long tcmp;
+
+ /*
+ * We currently avoid using 64bit arithmetic by using the
+ * fact that anything faster than 1GHz is easily representable
+ * by 32bits.
+ */
+ if (period_ns > NS_IN_SEC || duty_ns > NS_IN_SEC || period_ns == 0)
+ return -ERANGE;
+
+ if (duty_ns > period_ns)
+ return -EINVAL;
+
+ frequency = NS_IN_SEC / period_ns;
+
+ /* Check to see if we are changing the clock rate of the PWM */
+ tin_rate = pwm_calc_tin(pwm_id, frequency);
+
+ tin_ns = NS_IN_SEC / tin_rate;
+ tcnt = period_ns / tin_ns;
+
+ /* Note, counters count down */
+ tcmp = duty_ns / tin_ns;
+ tcmp = tcnt - tcmp;
+
+ /* Update the PWM register block. */
+ offset = pwm_id * 3;
+ if (pwm_id < 4) {
+ writel(tcnt, &pwm->tcntb0 + offset);
+ writel(tcmp, &pwm->tcmpb0 + offset);
+ }
+
+ tcon = readl(&pwm->tcon);
+ tcon |= TCON_UPDATE(pwm_id);
+ if (pwm_id < 4)
+ tcon |= TCON_AUTO_RELOAD(pwm_id);
+ else
+ tcon |= TCON4_AUTO_RELOAD;
+ writel(tcon, &pwm->tcon);
+
+ tcon &= ~TCON_UPDATE(pwm_id);
+ writel(tcon, &pwm->tcon);
+
+ return 0;
+}
+
+int pwm_init(int pwm_id, int div, int invert)
+{
+ u32 val;
+ const struct s5p_timer *pwm =
+ (struct s5p_timer *)samsung_get_base_timer();
+ unsigned long ticks_per_period;
+ unsigned int offset, prescaler;
+
+ /*
+ * Timer Freq(HZ) =
+ * PWM_CLK / { (prescaler_value + 1) * (divider_value) }
+ */
+
+ val = readl(&pwm->tcfg0);
+ if (pwm_id < 2) {
+ prescaler = PRESCALER_0;
+ val &= ~0xff;
+ val |= (prescaler & 0xff);
+ } else {
+ prescaler = PRESCALER_1;
+ val &= ~(0xff << 8);
+ val |= (prescaler & 0xff) << 8;
+ }
+ writel(val, &pwm->tcfg0);
+ val = readl(&pwm->tcfg1);
+ val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));
+ val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);
+ writel(val, &pwm->tcfg1);
+
+ if (pwm_id == 4) {
+ /*
+ * TODO(sjg): Use this as a countdown timer for now. We count
+ * down from the maximum value to 0, then reset.
+ */
+ ticks_per_period = -1UL;
+ } else {
+ const unsigned long pwm_hz = 1000;
+ unsigned long timer_rate_hz = get_pwm_clk() /
+ ((prescaler + 1) * (1 << div));
+
+ ticks_per_period = timer_rate_hz / pwm_hz;
+ }
+
+ /* set count value */
+ offset = pwm_id * 3;
+
+ writel(ticks_per_period, &pwm->tcntb0 + offset);
+
+ val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));
+ if (invert && (pwm_id < 4))
+ val |= TCON_INVERTER(pwm_id);
+ writel(val, &pwm->tcon);
+
+ pwm_enable(pwm_id);
+
+ return 0;
+}
diff --git a/arch/arm/cpu/samsung-common/timer.c b/arch/arm/cpu/samsung-common/timer.c
new file mode 100644
index 0000000..2b105e9
--- /dev/null
+++ b/arch/arm/cpu/samsung-common/timer.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2009 Samsung Electronics
+ * Heungjun Kim <riverful.kim at samsung.com>
+ * Inki Dae <inki.dae at samsung.com>
+ * Minkyu Kang <mk7.kang at samsung.com>
+ *
+ * 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 <div64.h>
+#include <asm/io.h>
+#include <asm/samsung-common/pwm.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clk.h>
+#include <pwm.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+unsigned long get_current_tick(void);
+
+/* macro to read the 16 bit timer */
+static inline struct s5p_timer *s5p_get_base_timer(void)
+{
+ return (struct s5p_timer *)samsung_get_base_timer();
+}
+
+/**
+ * Read the countdown timer.
+ *
+ * This operates at 1MHz and counts downwards. It will wrap about every
+ * hour (2^32 microseconds).
+ *
+ * @return current value of timer
+ */
+static unsigned long timer_get_us_down(void)
+{
+ struct s5p_timer *const timer = s5p_get_base_timer();
+
+ return readl(&timer->tcnto4);
+}
+
+int timer_init(void)
+{
+ /* PWM Timer 4 */
+ pwm_init(4, MUX_DIV_4, 0);
+ pwm_config(4, 100000, 100000);
+ pwm_enable(4);
+
+ /* Use this as the current monotonic time in us */
+ gd->arch.timer_reset_value = 0;
+
+ /* Use this as the last timer value we saw */
+ gd->arch.lastinc = timer_get_us_down();
+ reset_timer_masked();
+
+ return 0;
+}
+
+/*
+ * timer without interrupts
+ */
+unsigned long get_timer(unsigned long base)
+{
+ unsigned long long time_ms;
+
+ ulong now = timer_get_us_down();
+
+ /*
+ * Increment the time by the amount elapsed since the last read.
+ * The timer may have wrapped around, but it makes no difference to
+ * our arithmetic here.
+ */
+ gd->arch.timer_reset_value += gd->arch.lastinc - now;
+ gd->arch.lastinc = now;
+
+ /* Divide by 1000 to convert from us to ms */
+ time_ms = gd->arch.timer_reset_value;
+ do_div(time_ms, 1000);
+ return time_ms - base;
+}
+
+unsigned long __attribute__((no_instrument_function)) timer_get_us(void)
+{
+ static unsigned long base_time_us;
+
+ struct s5p_timer *const timer =
+ (struct s5p_timer *)samsung_get_base_timer();
+ unsigned long now_downward_us = readl(&timer->tcnto4);
+
+ if (!base_time_us)
+ base_time_us = now_downward_us;
+
+ /* Note that this timer counts downward. */
+ return base_time_us - now_downward_us;
+}
+
+/* delay x useconds */
+void __udelay(unsigned long usec)
+{
+ unsigned long count_value;
+
+ count_value = timer_get_us_down();
+ while ((int)(count_value - timer_get_us_down()) < (int)usec)
+ ;
+}
+
+void reset_timer_masked(void)
+{
+ struct s5p_timer *const timer = s5p_get_base_timer();
+
+ /* reset time */
+ gd->arch.lastinc = readl(&timer->tcnto4);
+ gd->arch.tbl = 0;
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+ return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+unsigned long get_tbclk(void)
+{
+ return CONFIG_SYS_HZ;
+}
diff --git a/arch/arm/include/asm/arch-exynos/pwm.h b/arch/arm/include/asm/arch-exynos/pwm.h
deleted file mode 100644
index 3e95160..0000000
--- a/arch/arm/include/asm/arch-exynos/pwm.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2009 Samsung Electronics
- * Kyungmin Park <kyungmin.park at samsung.com>
- * Minkyu Kang <mk7.kang at samsung.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 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
- */
-
-#ifndef __ASM_ARM_ARCH_PWM_H_
-#define __ASM_ARM_ARCH_PWM_H_
-
-#define PRESCALER_0 (8 - 1) /* prescaler of timer 0, 1 */
-#define PRESCALER_1 (16 - 1) /* prescaler of timer 2, 3, 4 */
-
-/* Divider MUX */
-#define MUX_DIV_1 0 /* 1/1 period */
-#define MUX_DIV_2 1 /* 1/2 period */
-#define MUX_DIV_4 2 /* 1/4 period */
-#define MUX_DIV_8 3 /* 1/8 period */
-#define MUX_DIV_16 4 /* 1/16 period */
-
-#define MUX_DIV_SHIFT(x) (x * 4)
-
-#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
-
-#define TCON_START(x) (1 << TCON_OFFSET(x))
-#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
-#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
-#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
-#define TCON4_AUTO_RELOAD (1 << 22)
-
-#ifndef __ASSEMBLY__
-struct s5p_timer {
- unsigned int tcfg0;
- unsigned int tcfg1;
- unsigned int tcon;
- unsigned int tcntb0;
- unsigned int tcmpb0;
- unsigned int tcnto0;
- unsigned int tcntb1;
- unsigned int tcmpb1;
- unsigned int tcnto1;
- unsigned int tcntb2;
- unsigned int tcmpb2;
- unsigned int tcnto2;
- unsigned int tcntb3;
- unsigned int tcmpb3;
- unsigned int tcnto3;
- unsigned int tcntb4;
- unsigned int tcnto4;
- unsigned int tintcstat;
-};
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/include/asm/arch-s5pc1xx/pwm.h b/arch/arm/include/asm/arch-s5pc1xx/pwm.h
deleted file mode 100644
index d0cf3cb..0000000
--- a/arch/arm/include/asm/arch-s5pc1xx/pwm.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) 2009 Samsung Electronics
- * Kyungmin Park <kyungmin.park at samsung.com>
- * Minkyu Kang <mk7.kang at samsung.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 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
- */
-
-#ifndef __ASM_ARM_ARCH_PWM_H_
-#define __ASM_ARM_ARCH_PWM_H_
-
-#define PRESCALER_0 (8 - 1) /* prescaler of timer 0, 1 */
-#define PRESCALER_1 (16 - 1) /* prescaler of timer 2, 3, 4 */
-
-/* Divider MUX */
-#define MUX_DIV_1 0 /* 1/1 period */
-#define MUX_DIV_2 1 /* 1/2 period */
-#define MUX_DIV_4 2 /* 1/4 period */
-#define MUX_DIV_8 3 /* 1/8 period */
-#define MUX_DIV_16 4 /* 1/16 period */
-
-#define MUX_DIV_SHIFT(x) (x * 4)
-
-#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
-
-#define TCON_START(x) (1 << TCON_OFFSET(x))
-#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
-#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
-#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
-#define TCON4_AUTO_RELOAD (1 << 22)
-
-#ifndef __ASSEMBLY__
-struct s5p_timer {
- unsigned int tcfg0;
- unsigned int tcfg1;
- unsigned int tcon;
- unsigned int tcntb0;
- unsigned int tcmpb0;
- unsigned int tcnto0;
- unsigned int tcntb1;
- unsigned int tcmpb1;
- unsigned int tcnto1;
- unsigned int tcntb2;
- unsigned int tcmpb2;
- unsigned int tcnto2;
- unsigned int tcntb3;
- unsigned int res1;
- unsigned int tcnto3;
- unsigned int tcntb4;
- unsigned int tcnto4;
- unsigned int tintcstat;
-};
-#endif /* __ASSEMBLY__ */
-
-#endif
diff --git a/arch/arm/include/asm/samsung-common/pwm.h b/arch/arm/include/asm/samsung-common/pwm.h
new file mode 100644
index 0000000..3e95160
--- /dev/null
+++ b/arch/arm/include/asm/samsung-common/pwm.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2009 Samsung Electronics
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ * Minkyu Kang <mk7.kang at samsung.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 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
+ */
+
+#ifndef __ASM_ARM_ARCH_PWM_H_
+#define __ASM_ARM_ARCH_PWM_H_
+
+#define PRESCALER_0 (8 - 1) /* prescaler of timer 0, 1 */
+#define PRESCALER_1 (16 - 1) /* prescaler of timer 2, 3, 4 */
+
+/* Divider MUX */
+#define MUX_DIV_1 0 /* 1/1 period */
+#define MUX_DIV_2 1 /* 1/2 period */
+#define MUX_DIV_4 2 /* 1/4 period */
+#define MUX_DIV_8 3 /* 1/8 period */
+#define MUX_DIV_16 4 /* 1/16 period */
+
+#define MUX_DIV_SHIFT(x) (x * 4)
+
+#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
+
+#define TCON_START(x) (1 << TCON_OFFSET(x))
+#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
+#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
+#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
+#define TCON4_AUTO_RELOAD (1 << 22)
+
+#ifndef __ASSEMBLY__
+struct s5p_timer {
+ unsigned int tcfg0;
+ unsigned int tcfg1;
+ unsigned int tcon;
+ unsigned int tcntb0;
+ unsigned int tcmpb0;
+ unsigned int tcnto0;
+ unsigned int tcntb1;
+ unsigned int tcmpb1;
+ unsigned int tcnto1;
+ unsigned int tcntb2;
+ unsigned int tcmpb2;
+ unsigned int tcnto2;
+ unsigned int tcntb3;
+ unsigned int tcmpb3;
+ unsigned int tcnto3;
+ unsigned int tcntb4;
+ unsigned int tcnto4;
+ unsigned int tintcstat;
+};
+#endif /* __ASSEMBLY__ */
+
+#endif
--
1.7.10.4
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