diff options
Diffstat (limited to 'arch/arm/plat-mxc')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/mxc_timer.h | 158 | ||||
| -rw-r--r-- | arch/arm/plat-mxc/time.c | 155 |
2 files changed, 135 insertions, 178 deletions
diff --git a/arch/arm/plat-mxc/include/mach/mxc_timer.h b/arch/arm/plat-mxc/include/mach/mxc_timer.h deleted file mode 100644 index 6c19a134744b..000000000000 --- a/arch/arm/plat-mxc/include/mach/mxc_timer.h +++ /dev/null @@ -1,158 +0,0 @@ -/* - * 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 diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c index dab3357196fb..85f002e7f1e5 100644 --- a/arch/arm/plat-mxc/time.c +++ b/arch/arm/plat-mxc/time.c @@ -29,22 +29,85 @@ #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, @@ -54,6 +117,9 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) { 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); @@ -63,15 +129,29 @@ static int __init mxc_clocksource_init(struct clk *timer_clk) /* 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; } @@ -100,8 +180,13 @@ static void mxc_set_mode(enum clock_event_mode mode, 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(); } @@ -148,7 +233,10 @@ static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id) 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(); @@ -168,7 +256,7 @@ static struct clock_event_device clockevent_mxc = { .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, }; @@ -176,6 +264,9 @@ static int __init mxc_clockevent_init(struct clk *timer_clk) { 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 = @@ -192,23 +283,47 @@ static int __init mxc_clockevent_init(struct clk *timer_clk) 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); } |