+++ /dev/null
-/*
- * mxc_timer.h
- *
- * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
- *
- * Platform independent (i.MX1, i.MX2, i.MX3) definition for timer handling.
- *
- * 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., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- */
-
-#ifndef __PLAT_MXC_TIMER_H
-#define __PLAT_MXC_TIMER_H
-
-#include <linux/clk.h>
-#include <mach/hardware.h>
-
-#ifdef CONFIG_ARCH_MX1
-#define TIMER_BASE IO_ADDRESS(TIM1_BASE_ADDR)
-#define TIMER_INTERRUPT TIM1_INT
-
-#define TCTL_VAL TCTL_CLK_PCLK1
-#define TCTL_IRQEN (1<<4)
-#define TCTL_FRR (1<<8)
-#define TCTL_CLK_PCLK1 (1<<1)
-#define TCTL_CLK_PCLK1_4 (2<<1)
-#define TCTL_CLK_TIN (3<<1)
-#define TCTL_CLK_32 (4<<1)
-
-#define MXC_TCTL 0x00
-#define MXC_TPRER 0x04
-#define MXC_TCMP 0x08
-#define MXC_TCR 0x0c
-#define MXC_TCN 0x10
-#define MXC_TSTAT 0x14
-#define TSTAT_CAPT (1<<1)
-#define TSTAT_COMP (1<<0)
-
-static inline void gpt_irq_disable(void)
-{
- unsigned int tmp;
-
- tmp = __raw_readl(TIMER_BASE + MXC_TCTL);
- __raw_writel(tmp & ~TCTL_IRQEN, TIMER_BASE + MXC_TCTL);
-}
-
-static inline void gpt_irq_enable(void)
-{
- __raw_writel(__raw_readl(TIMER_BASE + MXC_TCTL) | TCTL_IRQEN,
- TIMER_BASE + MXC_TCTL);
-}
-
-static void gpt_irq_acknowledge(void)
-{
- __raw_writel(0, TIMER_BASE + MXC_TSTAT);
-}
-#endif /* CONFIG_ARCH_MX1 */
-
-#ifdef CONFIG_ARCH_MX2
-#define TIMER_BASE IO_ADDRESS(GPT1_BASE_ADDR)
-#define TIMER_INTERRUPT MXC_INT_GPT1
-
-#define MXC_TCTL 0x00
-#define TCTL_VAL TCTL_CLK_PCLK1
-#define TCTL_CLK_PCLK1 (1<<1)
-#define TCTL_CLK_PCLK1_4 (2<<1)
-#define TCTL_IRQEN (1<<4)
-#define TCTL_FRR (1<<8)
-#define MXC_TPRER 0x04
-#define MXC_TCMP 0x08
-#define MXC_TCR 0x0c
-#define MXC_TCN 0x10
-#define MXC_TSTAT 0x14
-#define TSTAT_CAPT (1<<1)
-#define TSTAT_COMP (1<<0)
-
-static inline void gpt_irq_disable(void)
-{
- unsigned int tmp;
-
- tmp = __raw_readl(TIMER_BASE + MXC_TCTL);
- __raw_writel(tmp & ~TCTL_IRQEN, TIMER_BASE + MXC_TCTL);
-}
-
-static inline void gpt_irq_enable(void)
-{
- __raw_writel(__raw_readl(TIMER_BASE + MXC_TCTL) | TCTL_IRQEN,
- TIMER_BASE + MXC_TCTL);
-}
-
-static void gpt_irq_acknowledge(void)
-{
- __raw_writel(TSTAT_CAPT | TSTAT_COMP, TIMER_BASE + MXC_TSTAT);
-}
-#endif /* CONFIG_ARCH_MX2 */
-
-#ifdef CONFIG_ARCH_MX3
-#define TIMER_BASE IO_ADDRESS(GPT1_BASE_ADDR)
-#define TIMER_INTERRUPT MXC_INT_GPT
-
-#define MXC_TCTL 0x00
-#define TCTL_VAL (TCTL_CLK_IPG | TCTL_WAITEN)
-#define TCTL_CLK_IPG (1<<6)
-#define TCTL_FRR (1<<9)
-#define TCTL_WAITEN (1<<3)
-
-#define MXC_TPRER 0x04
-#define MXC_TSTAT 0x08
-#define TSTAT_OF1 (1<<0)
-#define TSTAT_OF2 (1<<1)
-#define TSTAT_OF3 (1<<2)
-#define TSTAT_IF1 (1<<3)
-#define TSTAT_IF2 (1<<4)
-#define TSTAT_ROV (1<<5)
-#define MXC_IR 0x0c
-#define MXC_TCMP 0x10
-#define MXC_TCMP2 0x14
-#define MXC_TCMP3 0x18
-#define MXC_TCR 0x1c
-#define MXC_TCN 0x24
-
-static inline void gpt_irq_disable(void)
-{
- __raw_writel(0, TIMER_BASE + MXC_IR);
-}
-
-static inline void gpt_irq_enable(void)
-{
- __raw_writel(1<<0, TIMER_BASE + MXC_IR);
-}
-
-static inline void gpt_irq_acknowledge(void)
-{
- __raw_writel(TSTAT_OF1, TIMER_BASE + MXC_TSTAT);
-}
-#endif /* CONFIG_ARCH_MX3 */
-
-#define TCTL_SWR (1<<15)
-#define TCTL_CC (1<<10)
-#define TCTL_OM (1<<9)
-#define TCTL_CAP_RIS (1<<6)
-#define TCTL_CAP_FAL (2<<6)
-#define TCTL_CAP_RIS_FAL (3<<6)
-#define TCTL_CAP_ENA (1<<5)
-#define TCTL_TEN (1<<0)
-
-#endif
#include <mach/hardware.h>
#include <asm/mach/time.h>
#include <mach/common.h>
-#include <mach/mxc_timer.h>
+
+/* defines common for all i.MX */
+#define MXC_TCTL 0x00
+#define MXC_TCTL_TEN (1 << 0)
+#define MXC_TPRER 0x04
+
+/* MX1, MX21, MX27 */
+#define MX1_2_TCTL_CLK_PCLK1 (1 << 1)
+#define MX1_2_TCTL_IRQEN (1 << 4)
+#define MX1_2_TCTL_FRR (1 << 8)
+#define MX1_2_TCMP 0x08
+#define MX1_2_TCN 0x10
+#define MX1_2_TSTAT 0x14
+
+/* MX21, MX27 */
+#define MX2_TSTAT_CAPT (1 << 1)
+#define MX2_TSTAT_COMP (1 << 0)
+
+/* MX31, MX35 */
+#define MX3_TCTL_WAITEN (1 << 3)
+#define MX3_TCTL_CLK_IPG (1 << 6)
+#define MX3_TCTL_FRR (1 << 9)
+#define MX3_IR 0x0c
+#define MX3_TSTAT 0x08
+#define MX3_TSTAT_OF1 (1 << 0)
+#define MX3_TCN 0x24
+#define MX3_TCMP 0x10
static struct clock_event_device clockevent_mxc;
static enum clock_event_mode clockevent_mode = CLOCK_EVT_MODE_UNUSED;
-/* clock source */
+static void __iomem *timer_base;
-static cycle_t mxc_get_cycles(struct clocksource *cs)
+static inline void gpt_irq_disable(void)
{
- return __raw_readl(TIMER_BASE + MXC_TCN);
+ unsigned int tmp;
+
+ if (cpu_is_mx3())
+ __raw_writel(0, timer_base + MX3_IR);
+ else {
+ tmp = __raw_readl(timer_base + MXC_TCTL);
+ __raw_writel(tmp & ~MX1_2_TCTL_IRQEN, timer_base + MXC_TCTL);
+ }
+}
+
+static inline void gpt_irq_enable(void)
+{
+ if (cpu_is_mx3())
+ __raw_writel(1<<0, timer_base + MX3_IR);
+ else {
+ __raw_writel(__raw_readl(timer_base + MXC_TCTL) | MX1_2_TCTL_IRQEN,
+ timer_base + MXC_TCTL);
+ }
+}
+
+static void gpt_irq_acknowledge(void)
+{
+ if (cpu_is_mx1())
+ __raw_writel(0, timer_base + MX1_2_TSTAT);
+ if (cpu_is_mx2())
+ __raw_writel(MX2_TSTAT_CAPT | MX2_TSTAT_COMP, timer_base + MX1_2_TSTAT);
+ if (cpu_is_mx3())
+ __raw_writel(MX3_TSTAT_OF1, timer_base + MX3_TSTAT);
+}
+
+static cycle_t mx1_2_get_cycles(struct clocksource *cs)
+{
+ return __raw_readl(timer_base + MX1_2_TCN);
+}
+
+static cycle_t mx3_get_cycles(struct clocksource *cs)
+{
+ return __raw_readl(timer_base + MX3_TCN);
}
static struct clocksource clocksource_mxc = {
.name = "mxc_timer1",
.rating = 200,
- .read = mxc_get_cycles,
+ .read = mx1_2_get_cycles,
.mask = CLOCKSOURCE_MASK(32),
.shift = 20,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
{
unsigned int c = clk_get_rate(timer_clk);
+ if (cpu_is_mx3())
+ clocksource_mxc.read = mx3_get_cycles;
+
clocksource_mxc.mult = clocksource_hz2mult(c,
clocksource_mxc.shift);
clocksource_register(&clocksource_mxc);
/* clock event */
-static int mxc_set_next_event(unsigned long evt,
+static int mx1_2_set_next_event(unsigned long evt,
struct clock_event_device *unused)
{
unsigned long tcmp;
- tcmp = __raw_readl(TIMER_BASE + MXC_TCN) + evt;
- __raw_writel(tcmp, TIMER_BASE + MXC_TCMP);
+ tcmp = __raw_readl(timer_base + MX1_2_TCN) + evt;
- return (int)(tcmp - __raw_readl(TIMER_BASE + MXC_TCN)) < 0 ?
+ __raw_writel(tcmp, timer_base + MX1_2_TCMP);
+
+ return (int)(tcmp - __raw_readl(timer_base + MX1_2_TCN)) < 0 ?
+ -ETIME : 0;
+}
+
+static int mx3_set_next_event(unsigned long evt,
+ struct clock_event_device *unused)
+{
+ unsigned long tcmp;
+
+ tcmp = __raw_readl(timer_base + MX3_TCN) + evt;
+
+ __raw_writel(tcmp, timer_base + MX3_TCMP);
+
+ return (int)(tcmp - __raw_readl(timer_base + MX3_TCN)) < 0 ?
-ETIME : 0;
}
if (mode != clockevent_mode) {
/* Set event time into far-far future */
- __raw_writel(__raw_readl(TIMER_BASE + MXC_TCN) - 3,
- TIMER_BASE + MXC_TCMP);
+ if (cpu_is_mx3())
+ __raw_writel(__raw_readl(timer_base + MX3_TCN) - 3,
+ timer_base + MX3_TCMP);
+ else
+ __raw_writel(__raw_readl(timer_base + MX1_2_TCN) - 3,
+ timer_base + MX1_2_TCMP);
+
/* Clear pending interrupt */
gpt_irq_acknowledge();
}
struct clock_event_device *evt = &clockevent_mxc;
uint32_t tstat;
- tstat = __raw_readl(TIMER_BASE + MXC_TSTAT);
+ if (cpu_is_mx3())
+ tstat = __raw_readl(timer_base + MX1_2_TSTAT);
+ else
+ tstat = __raw_readl(timer_base + MX3_TSTAT);
gpt_irq_acknowledge();
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 32,
.set_mode = mxc_set_mode,
- .set_next_event = mxc_set_next_event,
+ .set_next_event = mx1_2_set_next_event,
.rating = 200,
};
{
unsigned int c = clk_get_rate(timer_clk);
+ if (cpu_is_mx3())
+ clockevent_mxc.set_next_event = mx3_set_next_event;
+
clockevent_mxc.mult = div_sc(c, NSEC_PER_SEC,
clockevent_mxc.shift);
clockevent_mxc.max_delta_ns =
void __init mxc_timer_init(struct clk *timer_clk)
{
+ uint32_t tctl_val;
+ int irq;
+
clk_enable(timer_clk);
+ if (cpu_is_mx1()) {
+#ifdef CONFIG_ARCH_MX1
+ timer_base = IO_ADDRESS(TIM1_BASE_ADDR);
+ irq = TIM1_INT;
+#endif
+ } else if (cpu_is_mx2()) {
+#ifdef CONFIG_ARCH_MX2
+ timer_base = IO_ADDRESS(GPT1_BASE_ADDR);
+ irq = MXC_INT_GPT1;
+#endif
+ } else if (cpu_is_mx3()) {
+#ifdef CONFIG_ARCH_MX3
+ timer_base = IO_ADDRESS(GPT1_BASE_ADDR);
+ irq = MXC_INT_GPT;
+#endif
+ } else
+ BUG();
+
/*
* Initialise to a known state (all timers off, and timing reset)
*/
- __raw_writel(0, TIMER_BASE + MXC_TCTL);
- __raw_writel(0, TIMER_BASE + MXC_TPRER); /* see datasheet note */
- __raw_writel(TCTL_FRR | /* free running */
- TCTL_VAL | /* set clocksource and arch specific bits */
- TCTL_TEN, /* start the timer */
- TIMER_BASE + MXC_TCTL);
+ __raw_writel(0, timer_base + MXC_TCTL);
+ __raw_writel(0, timer_base + MXC_TPRER); /* see datasheet note */
+
+ if (cpu_is_mx3())
+ tctl_val = MX3_TCTL_CLK_IPG | MX3_TCTL_FRR | MX3_TCTL_WAITEN | MXC_TCTL_TEN;
+ else
+ tctl_val = MX1_2_TCTL_FRR | MX1_2_TCTL_CLK_PCLK1 | MXC_TCTL_TEN;
+
+ __raw_writel(tctl_val, timer_base + MXC_TCTL);
/* init and register the timer to the framework */
mxc_clocksource_init(timer_clk);
mxc_clockevent_init(timer_clk);
/* Make irqs happen */
- setup_irq(TIMER_INTERRUPT, &mxc_timer_irq);
+ setup_irq(irq, &mxc_timer_irq);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff