diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/common/timer-sp.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/common/timer-sp.c | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/ANDROID_3.4.5/arch/arm/common/timer-sp.c b/ANDROID_3.4.5/arch/arm/common/timer-sp.c deleted file mode 100644 index df13a3ff..00000000 --- a/ANDROID_3.4.5/arch/arm/common/timer-sp.c +++ /dev/null @@ -1,191 +0,0 @@ -/* - * 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 <linux/clk.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> -#include <linux/err.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/io.h> - -#include <asm/sched_clock.h> -#include <asm/hardware/arm_timer.h> - -static long __init sp804_get_clock_rate(const char *name) -{ - struct clk *clk; - long rate; - int err; - - clk = clk_get_sys("sp804", name); - if (IS_ERR(clk)) { - pr_err("sp804: %s clock not found: %d\n", name, - (int)PTR_ERR(clk)); - return PTR_ERR(clk); - } - - err = clk_prepare(clk); - if (err) { - pr_err("sp804: %s clock failed to prepare: %d\n", name, err); - clk_put(clk); - return err; - } - - err = clk_enable(clk); - if (err) { - pr_err("sp804: %s clock failed to enable: %d\n", name, err); - clk_unprepare(clk); - clk_put(clk); - return err; - } - - rate = clk_get_rate(clk); - if (rate < 0) { - pr_err("sp804: %s clock failed to get rate: %ld\n", name, rate); - clk_disable(clk); - clk_unprepare(clk); - clk_put(clk); - } - - return rate; -} - -static void __iomem *sched_clock_base; - -static u32 sp804_read(void) -{ - return ~readl_relaxed(sched_clock_base + TIMER_VALUE); -} - -void __init __sp804_clocksource_and_sched_clock_init(void __iomem *base, - const char *name, - int use_sched_clock) -{ - long rate = sp804_get_clock_rate(name); - - if (rate < 0) - return; - - /* setup timer 0 as free-running clocksource */ - writel(0, base + TIMER_CTRL); - writel(0xffffffff, base + TIMER_LOAD); - writel(0xffffffff, base + TIMER_VALUE); - writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, - base + TIMER_CTRL); - - clocksource_mmio_init(base + TIMER_VALUE, name, - rate, 200, 32, clocksource_mmio_readl_down); - - if (use_sched_clock) { - sched_clock_base = base; - setup_sched_clock(sp804_read, 32, rate); - } -} - - -static void __iomem *clkevt_base; -static unsigned long clkevt_reload; - -/* - * 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(clkevt_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 = { - .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 irq, - const char *name) -{ - struct clock_event_device *evt = &sp804_clockevent; - long rate = sp804_get_clock_rate(name); - - if (rate < 0) - return; - - clkevt_base = base; - clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ); - evt->name = name; - evt->irq = irq; - - setup_irq(irq, &sp804_timer_irq); - clockevents_config_and_register(evt, rate, 0xf, 0xffffffff); -} |