From: Rob Herring Date: Wed, 6 Oct 2010 15:18:08 +0000 (+0100) Subject: ARM: 6432/1: move timer-sp.c from versatile to common X-Git-Tag: firefly_0821_release~7613^2~3117^2~5^9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8a9618f5dfca35edb0d7ab6374ff586e2e9e989b;p=firefly-linux-kernel-4.4.55.git ARM: 6432/1: move timer-sp.c from versatile to common From: Rob Herring The timer-sp h/w used on versatile platforms can also be used for other platforms, so move it to a common location. Signed-off-by: Rob Herring Signed-off-by: Russell King --- diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile index e6e8664a9413..e7521bca2c35 100644 --- a/arch/arm/common/Makefile +++ b/arch/arm/common/Makefile @@ -17,3 +17,4 @@ obj-$(CONFIG_ARCH_IXP2000) += uengine.o obj-$(CONFIG_ARCH_IXP23XX) += uengine.o obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o obj-$(CONFIG_COMMON_CLKDEV) += clkdev.o +obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c new file mode 100644 index 000000000000..4740313daa5b --- /dev/null +++ b/arch/arm/common/timer-sp.c @@ -0,0 +1,154 @@ +/* + * linux/arch/arm/common/timer-sp.c + * + * Copyright (C) 1999 - 2003 ARM Limited + * Copyright (C) 2000 Deep Blue Solutions Ltd + * + * 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 +#include +#include +#include +#include + +#include + +/* + * These timers are currently always setup to be clocked at 1MHz. + */ +#define TIMER_FREQ_KHZ (1000) +#define TIMER_RELOAD (TIMER_FREQ_KHZ * 1000 / HZ) + +static void __iomem *clksrc_base; + +static cycle_t sp804_read(struct clocksource *cs) +{ + return ~readl(clksrc_base + TIMER_VALUE); +} + +static struct clocksource clocksource_sp804 = { + .name = "timer3", + .rating = 200, + .read = sp804_read, + .mask = CLOCKSOURCE_MASK(32), + .shift = 20, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +void __init sp804_clocksource_init(void __iomem *base) +{ + struct clocksource *cs = &clocksource_sp804; + + clksrc_base = base; + + /* setup timer 0 as free-running clocksource */ + writel(0, clksrc_base + TIMER_CTRL); + writel(0xffffffff, clksrc_base + TIMER_LOAD); + writel(0xffffffff, clksrc_base + TIMER_VALUE); + writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, + clksrc_base + TIMER_CTRL); + + cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift); + clocksource_register(cs); +} + + +static void __iomem *clkevt_base; + +/* + * IRQ handler for the timer + */ +static irqreturn_t sp804_timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = dev_id; + + /* clear the interrupt */ + writel(1, clkevt_base + TIMER_INTCLR); + + evt->event_handler(evt); + + return IRQ_HANDLED; +} + +static void sp804_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE; + + writel(ctrl, clkevt_base + TIMER_CTRL); + + switch (mode) { + case CLOCK_EVT_MODE_PERIODIC: + writel(TIMER_RELOAD, clkevt_base + TIMER_LOAD); + ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE; + break; + + case CLOCK_EVT_MODE_ONESHOT: + /* period set, and timer enabled in 'next_event' hook */ + ctrl |= TIMER_CTRL_ONESHOT; + break; + + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + default: + break; + } + + writel(ctrl, clkevt_base + TIMER_CTRL); +} + +static int sp804_set_next_event(unsigned long next, + struct clock_event_device *evt) +{ + unsigned long ctrl = readl(clkevt_base + TIMER_CTRL); + + writel(next, clkevt_base + TIMER_LOAD); + writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL); + + return 0; +} + +static struct clock_event_device sp804_clockevent = { + .name = "timer0", + .shift = 32, + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_mode = sp804_set_mode, + .set_next_event = sp804_set_next_event, + .rating = 300, + .cpumask = cpu_all_mask, +}; + +static struct irqaction sp804_timer_irq = { + .name = "timer", + .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, + .handler = sp804_timer_interrupt, + .dev_id = &sp804_clockevent, +}; + +void __init sp804_clockevents_init(void __iomem *base, unsigned int timer_irq) +{ + struct clock_event_device *evt = &sp804_clockevent; + + clkevt_base = base; + + evt->irq = timer_irq; + evt->mult = div_sc(TIMER_FREQ_KHZ, NSEC_PER_MSEC, evt->shift); + evt->max_delta_ns = clockevent_delta2ns(0xffffffff, evt); + evt->min_delta_ns = clockevent_delta2ns(0xf, evt); + + setup_irq(timer_irq, &sp804_timer_irq); + clockevents_register_device(evt); +} diff --git a/arch/arm/include/asm/hardware/timer-sp.h b/arch/arm/include/asm/hardware/timer-sp.h new file mode 100644 index 000000000000..21e75e30d497 --- /dev/null +++ b/arch/arm/include/asm/hardware/timer-sp.h @@ -0,0 +1,2 @@ +void sp804_clocksource_init(void __iomem *); +void sp804_clockevents_init(void __iomem *, unsigned int); diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c index 6258c90d020c..1713ecf0c95f 100644 --- a/arch/arm/mach-integrator/integrator_cp.c +++ b/arch/arm/mach-integrator/integrator_cp.c @@ -41,7 +41,7 @@ #include #include -#include +#include #include "common.h" diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c index 07c08151dfe6..aa54b577fc1e 100644 --- a/arch/arm/mach-realview/core.c +++ b/arch/arm/mach-realview/core.c @@ -50,7 +50,7 @@ #include #include #include -#include +#include #include "core.h" diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c index e38acb0f89c8..6b93bd600271 100644 --- a/arch/arm/mach-versatile/core.c +++ b/arch/arm/mach-versatile/core.c @@ -49,7 +49,7 @@ #include #include #include -#include +#include #include "core.h" diff --git a/arch/arm/mach-vexpress/ct-ca9x4.c b/arch/arm/mach-vexpress/ct-ca9x4.c index c2e405a9e025..101e79fd5ab6 100644 --- a/arch/arm/mach-vexpress/ct-ca9x4.c +++ b/arch/arm/mach-vexpress/ct-ca9x4.c @@ -21,7 +21,7 @@ #include #include -#include +#include #include #include diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c index 7eaa232180a5..91ff2e0df856 100644 --- a/arch/arm/mach-vexpress/v2m.c +++ b/arch/arm/mach-vexpress/v2m.c @@ -22,7 +22,7 @@ #include #include -#include +#include #include "core.h" diff --git a/arch/arm/plat-versatile/Makefile b/arch/arm/plat-versatile/Makefile index 5cf88e8427b1..aaa571d17924 100644 --- a/arch/arm/plat-versatile/Makefile +++ b/arch/arm/plat-versatile/Makefile @@ -1,5 +1,4 @@ obj-y := clock.o -obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o obj-$(CONFIG_ARCH_REALVIEW) += sched-clock.o obj-$(CONFIG_ARCH_VERSATILE) += sched-clock.o ifeq ($(CONFIG_LEDS_CLASS),y) diff --git a/arch/arm/plat-versatile/include/plat/timer-sp.h b/arch/arm/plat-versatile/include/plat/timer-sp.h deleted file mode 100644 index 21e75e30d497..000000000000 --- a/arch/arm/plat-versatile/include/plat/timer-sp.h +++ /dev/null @@ -1,2 +0,0 @@ -void sp804_clocksource_init(void __iomem *); -void sp804_clockevents_init(void __iomem *, unsigned int); diff --git a/arch/arm/plat-versatile/timer-sp.c b/arch/arm/plat-versatile/timer-sp.c deleted file mode 100644 index fb0d1c299718..000000000000 --- a/arch/arm/plat-versatile/timer-sp.c +++ /dev/null @@ -1,156 +0,0 @@ -/* - * linux/arch/arm/plat-versatile/timer-sp.c - * - * Copyright (C) 1999 - 2003 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd - * - * 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 -#include -#include -#include -#include - -#include - -#include - -/* - * These timers are currently always setup to be clocked at 1MHz. - */ -#define TIMER_FREQ_KHZ (1000) -#define TIMER_RELOAD (TIMER_FREQ_KHZ * 1000 / HZ) - -static void __iomem *clksrc_base; - -static cycle_t sp804_read(struct clocksource *cs) -{ - return ~readl(clksrc_base + TIMER_VALUE); -} - -static struct clocksource clocksource_sp804 = { - .name = "timer3", - .rating = 200, - .read = sp804_read, - .mask = CLOCKSOURCE_MASK(32), - .shift = 20, - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -void __init sp804_clocksource_init(void __iomem *base) -{ - struct clocksource *cs = &clocksource_sp804; - - clksrc_base = base; - - /* setup timer 0 as free-running clocksource */ - writel(0, clksrc_base + TIMER_CTRL); - writel(0xffffffff, clksrc_base + TIMER_LOAD); - writel(0xffffffff, clksrc_base + TIMER_VALUE); - writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, - clksrc_base + TIMER_CTRL); - - cs->mult = clocksource_khz2mult(TIMER_FREQ_KHZ, cs->shift); - clocksource_register(cs); -} - - -static void __iomem *clkevt_base; - -/* - * IRQ handler for the timer - */ -static irqreturn_t sp804_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; - - /* clear the interrupt */ - writel(1, clkevt_base + TIMER_INTCLR); - - evt->event_handler(evt); - - return IRQ_HANDLED; -} - -static void sp804_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - unsigned long ctrl = TIMER_CTRL_32BIT | TIMER_CTRL_IE; - - writel(ctrl, clkevt_base + TIMER_CTRL); - - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - writel(TIMER_RELOAD, clkevt_base + TIMER_LOAD); - ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE; - break; - - case CLOCK_EVT_MODE_ONESHOT: - /* period set, and timer enabled in 'next_event' hook */ - ctrl |= TIMER_CTRL_ONESHOT; - break; - - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - default: - break; - } - - writel(ctrl, clkevt_base + TIMER_CTRL); -} - -static int sp804_set_next_event(unsigned long next, - struct clock_event_device *evt) -{ - unsigned long ctrl = readl(clkevt_base + TIMER_CTRL); - - writel(next, clkevt_base + TIMER_LOAD); - writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL); - - return 0; -} - -static struct clock_event_device sp804_clockevent = { - .name = "timer0", - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_mode = sp804_set_mode, - .set_next_event = sp804_set_next_event, - .rating = 300, - .cpumask = cpu_all_mask, -}; - -static struct irqaction sp804_timer_irq = { - .name = "timer", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, - .handler = sp804_timer_interrupt, - .dev_id = &sp804_clockevent, -}; - -void __init sp804_clockevents_init(void __iomem *base, unsigned int timer_irq) -{ - struct clock_event_device *evt = &sp804_clockevent; - - clkevt_base = base; - - evt->irq = timer_irq; - evt->mult = div_sc(TIMER_FREQ_KHZ, NSEC_PER_MSEC, evt->shift); - evt->max_delta_ns = clockevent_delta2ns(0xffffffff, evt); - evt->min_delta_ns = clockevent_delta2ns(0xf, evt); - - setup_irq(timer_irq, &sp804_timer_irq); - clockevents_register_device(evt); -}