diff options
Diffstat (limited to 'arch/arm/mach-tegra/timer.c')
| -rw-r--r-- | arch/arm/mach-tegra/timer.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c deleted file mode 100644 index 9057d6fd1d3..00000000000 --- a/arch/arm/mach-tegra/timer.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * arch/arch/mach-tegra/timer.c - * - * Copyright (C) 2010 Google, Inc. - * - * Author: - * Colin Cross <ccross@google.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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. - * - */ - -#include <linux/init.h> -#include <linux/time.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/clockchips.h> -#include <linux/clocksource.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/cnt32_to_63.h> - -#include <asm/mach/time.h> -#include <asm/localtimer.h> - -#include <mach/iomap.h> -#include <mach/irqs.h> - -#include "board.h" -#include "clock.h" - -#define TIMERUS_CNTR_1US 0x10 -#define TIMERUS_USEC_CFG 0x14 -#define TIMERUS_CNTR_FREEZE 0x4c - -#define TIMER1_BASE 0x0 -#define TIMER2_BASE 0x8 -#define TIMER3_BASE 0x50 -#define TIMER4_BASE 0x58 - -#define TIMER_PTV 0x0 -#define TIMER_PCR 0x4 - -struct tegra_timer; - -static void __iomem *timer_reg_base = IO_ADDRESS(TEGRA_TMR1_BASE); - -#define timer_writel(value, reg) \ - __raw_writel(value, (u32)timer_reg_base + (reg)) -#define timer_readl(reg) \ - __raw_readl((u32)timer_reg_base + (reg)) - -static int tegra_timer_set_next_event(unsigned long cycles, - struct clock_event_device *evt) -{ - u32 reg; - - reg = 0x80000000 | ((cycles > 1) ? (cycles-1) : 0); - timer_writel(reg, TIMER3_BASE + TIMER_PTV); - - return 0; -} - -static void tegra_timer_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - u32 reg; - - timer_writel(0, TIMER3_BASE + TIMER_PTV); - - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - reg = 0xC0000000 | ((1000000/HZ)-1); - timer_writel(reg, TIMER3_BASE + TIMER_PTV); - break; - case CLOCK_EVT_MODE_ONESHOT: - break; - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_RESUME: - break; - } -} - -static cycle_t tegra_clocksource_read(struct clocksource *cs) -{ - return cnt32_to_63(timer_readl(TIMERUS_CNTR_1US)); -} - -static struct clock_event_device tegra_clockevent = { - .name = "timer0", - .rating = 300, - .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, - .set_next_event = tegra_timer_set_next_event, - .set_mode = tegra_timer_set_mode, -}; - -static struct clocksource tegra_clocksource = { - .name = "timer_us", - .rating = 300, - .read = tegra_clocksource_read, - .mask = 0x7FFFFFFFFFFFFFFFULL, - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -unsigned long long sched_clock(void) -{ - return clocksource_cyc2ns(tegra_clocksource.read(&tegra_clocksource), - tegra_clocksource.mult, tegra_clocksource.shift); -} - -static irqreturn_t tegra_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = (struct clock_event_device *)dev_id; - timer_writel(1<<30, TIMER3_BASE + TIMER_PCR); - evt->event_handler(evt); - return IRQ_HANDLED; -} - -static struct irqaction tegra_timer_irq = { - .name = "timer0", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_HIGH, - .handler = tegra_timer_interrupt, - .dev_id = &tegra_clockevent, - .irq = INT_TMR3, -}; - -static void __init tegra_init_timer(void) -{ - unsigned long rate = clk_measure_input_freq(); - int ret; - -#ifdef CONFIG_HAVE_ARM_TWD - twd_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x600); -#endif - - switch (rate) { - case 12000000: - timer_writel(0x000b, TIMERUS_USEC_CFG); - break; - case 13000000: - timer_writel(0x000c, TIMERUS_USEC_CFG); - break; - case 19200000: - timer_writel(0x045f, TIMERUS_USEC_CFG); - break; - case 26000000: - timer_writel(0x0019, TIMERUS_USEC_CFG); - break; - default: - WARN(1, "Unknown clock rate"); - } - - if (clocksource_register_hz(&tegra_clocksource, 1000000)) { - printk(KERN_ERR "Failed to register clocksource\n"); - BUG(); - } - - ret = setup_irq(tegra_timer_irq.irq, &tegra_timer_irq); - if (ret) { - printk(KERN_ERR "Failed to register timer IRQ: %d\n", ret); - BUG(); - } - - clockevents_calc_mult_shift(&tegra_clockevent, 1000000, 5); - tegra_clockevent.max_delta_ns = - clockevent_delta2ns(0x1fffffff, &tegra_clockevent); - tegra_clockevent.min_delta_ns = - clockevent_delta2ns(0x1, &tegra_clockevent); - tegra_clockevent.cpumask = cpu_all_mask; - tegra_clockevent.irq = tegra_timer_irq.irq; - clockevents_register_device(&tegra_clockevent); - - return; -} - -struct sys_timer tegra_timer = { - .init = tegra_init_timer, -}; |