diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/kernel/timer.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/microblaze/kernel/timer.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/kernel/timer.c b/ANDROID_3.4.5/arch/microblaze/kernel/timer.c deleted file mode 100644 index 522defa7..00000000 --- a/ANDROID_3.4.5/arch/microblaze/kernel/timer.c +++ /dev/null @@ -1,306 +0,0 @@ -/* - * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2007-2009 PetaLogix - * Copyright (C) 2006 Atmark Techno, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/interrupt.h> -#include <linux/profile.h> -#include <linux/irq.h> -#include <linux/delay.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/err.h> -#include <linux/clk.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> -#include <linux/io.h> -#include <linux/bug.h> -#include <asm/cpuinfo.h> -#include <asm/setup.h> -#include <asm/prom.h> -#include <asm/irq.h> -#include <linux/cnt32_to_63.h> - -#ifdef CONFIG_SELFMOD_TIMER -#include <asm/selfmod.h> -#define TIMER_BASE BARRIER_BASE_ADDR -#else -static unsigned int timer_baseaddr; -#define TIMER_BASE timer_baseaddr -#endif - -static unsigned int freq_div_hz; -static unsigned int timer_clock_freq; - -#define TCSR0 (0x00) -#define TLR0 (0x04) -#define TCR0 (0x08) -#define TCSR1 (0x10) -#define TLR1 (0x14) -#define TCR1 (0x18) - -#define TCSR_MDT (1<<0) -#define TCSR_UDT (1<<1) -#define TCSR_GENT (1<<2) -#define TCSR_CAPT (1<<3) -#define TCSR_ARHT (1<<4) -#define TCSR_LOAD (1<<5) -#define TCSR_ENIT (1<<6) -#define TCSR_ENT (1<<7) -#define TCSR_TINT (1<<8) -#define TCSR_PWMA (1<<9) -#define TCSR_ENALL (1<<10) - -static inline void microblaze_timer0_stop(void) -{ - out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0) & ~TCSR_ENT); -} - -static inline void microblaze_timer0_start_periodic(unsigned long load_val) -{ - if (!load_val) - load_val = 1; - out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */ - - /* load the initial value */ - out_be32(TIMER_BASE + TCSR0, TCSR_LOAD); - - /* see timer data sheet for detail - * !ENALL - don't enable 'em all - * !PWMA - disable pwm - * TINT - clear interrupt status - * ENT- enable timer itself - * ENIT - enable interrupt - * !LOAD - clear the bit to let go - * ARHT - auto reload - * !CAPT - no external trigger - * !GENT - no external signal - * UDT - set the timer as down counter - * !MDT0 - generate mode - */ - out_be32(TIMER_BASE + TCSR0, - TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT); -} - -static inline void microblaze_timer0_start_oneshot(unsigned long load_val) -{ - if (!load_val) - load_val = 1; - out_be32(TIMER_BASE + TLR0, load_val); /* loading value to timer reg */ - - /* load the initial value */ - out_be32(TIMER_BASE + TCSR0, TCSR_LOAD); - - out_be32(TIMER_BASE + TCSR0, - TCSR_TINT|TCSR_ENIT|TCSR_ENT|TCSR_ARHT|TCSR_UDT); -} - -static int microblaze_timer_set_next_event(unsigned long delta, - struct clock_event_device *dev) -{ - pr_debug("%s: next event, delta %x\n", __func__, (u32)delta); - microblaze_timer0_start_oneshot(delta); - return 0; -} - -static void microblaze_timer_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - printk(KERN_INFO "%s: periodic\n", __func__); - microblaze_timer0_start_periodic(freq_div_hz); - break; - case CLOCK_EVT_MODE_ONESHOT: - printk(KERN_INFO "%s: oneshot\n", __func__); - break; - case CLOCK_EVT_MODE_UNUSED: - printk(KERN_INFO "%s: unused\n", __func__); - break; - case CLOCK_EVT_MODE_SHUTDOWN: - printk(KERN_INFO "%s: shutdown\n", __func__); - microblaze_timer0_stop(); - break; - case CLOCK_EVT_MODE_RESUME: - printk(KERN_INFO "%s: resume\n", __func__); - break; - } -} - -static struct clock_event_device clockevent_microblaze_timer = { - .name = "microblaze_clockevent", - .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, - .shift = 8, - .rating = 300, - .set_next_event = microblaze_timer_set_next_event, - .set_mode = microblaze_timer_set_mode, -}; - -static inline void timer_ack(void) -{ - out_be32(TIMER_BASE + TCSR0, in_be32(TIMER_BASE + TCSR0)); -} - -static irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = &clockevent_microblaze_timer; -#ifdef CONFIG_HEART_BEAT - heartbeat(); -#endif - timer_ack(); - evt->event_handler(evt); - return IRQ_HANDLED; -} - -static struct irqaction timer_irqaction = { - .handler = timer_interrupt, - .flags = IRQF_DISABLED | IRQF_TIMER, - .name = "timer", - .dev_id = &clockevent_microblaze_timer, -}; - -static __init void microblaze_clockevent_init(void) -{ - clockevent_microblaze_timer.mult = - div_sc(timer_clock_freq, NSEC_PER_SEC, - clockevent_microblaze_timer.shift); - clockevent_microblaze_timer.max_delta_ns = - clockevent_delta2ns((u32)~0, &clockevent_microblaze_timer); - clockevent_microblaze_timer.min_delta_ns = - clockevent_delta2ns(1, &clockevent_microblaze_timer); - clockevent_microblaze_timer.cpumask = cpumask_of(0); - clockevents_register_device(&clockevent_microblaze_timer); -} - -static cycle_t microblaze_read(struct clocksource *cs) -{ - /* reading actual value of timer 1 */ - return (cycle_t) (in_be32(TIMER_BASE + TCR1)); -} - -static struct timecounter microblaze_tc = { - .cc = NULL, -}; - -static cycle_t microblaze_cc_read(const struct cyclecounter *cc) -{ - return microblaze_read(NULL); -} - -static struct cyclecounter microblaze_cc = { - .read = microblaze_cc_read, - .mask = CLOCKSOURCE_MASK(32), - .shift = 8, -}; - -static int __init init_microblaze_timecounter(void) -{ - microblaze_cc.mult = div_sc(timer_clock_freq, NSEC_PER_SEC, - microblaze_cc.shift); - - timecounter_init(µblaze_tc, µblaze_cc, sched_clock()); - - return 0; -} - -static struct clocksource clocksource_microblaze = { - .name = "microblaze_clocksource", - .rating = 300, - .read = microblaze_read, - .mask = CLOCKSOURCE_MASK(32), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -static int __init microblaze_clocksource_init(void) -{ - if (clocksource_register_hz(&clocksource_microblaze, timer_clock_freq)) - panic("failed to register clocksource"); - - /* stop timer1 */ - out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT); - /* start timer1 - up counting without interrupt */ - out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT); - - /* register timecounter - for ftrace support */ - init_microblaze_timecounter(); - return 0; -} - -/* - * We have to protect accesses before timer initialization - * and return 0 for sched_clock function below. - */ -static int timer_initialized; - -void __init time_init(void) -{ - u32 irq; - u32 timer_num = 1; - struct device_node *timer = NULL; - const void *prop; -#ifdef CONFIG_SELFMOD_TIMER - unsigned int timer_baseaddr = 0; - int arr_func[] = { - (int)µblaze_read, - (int)&timer_interrupt, - (int)µblaze_clocksource_init, - (int)µblaze_timer_set_mode, - (int)µblaze_timer_set_next_event, - 0 - }; -#endif - timer = of_find_compatible_node(NULL, NULL, "xlnx,xps-timer-1.00.a"); - BUG_ON(!timer); - - timer_baseaddr = be32_to_cpup(of_get_property(timer, "reg", NULL)); - timer_baseaddr = (unsigned long) ioremap(timer_baseaddr, PAGE_SIZE); - irq = irq_of_parse_and_map(timer, 0); - timer_num = be32_to_cpup(of_get_property(timer, - "xlnx,one-timer-only", NULL)); - if (timer_num) { - printk(KERN_EMERG "Please enable two timers in HW\n"); - BUG(); - } - -#ifdef CONFIG_SELFMOD_TIMER - selfmod_function((int *) arr_func, timer_baseaddr); -#endif - printk(KERN_INFO "%s #0 at 0x%08x, irq=%d\n", - timer->name, timer_baseaddr, irq); - - /* If there is clock-frequency property than use it */ - prop = of_get_property(timer, "clock-frequency", NULL); - if (prop) - timer_clock_freq = be32_to_cpup(prop); - else - timer_clock_freq = cpuinfo.cpu_clock_freq; - - freq_div_hz = timer_clock_freq / HZ; - - setup_irq(irq, &timer_irqaction); -#ifdef CONFIG_HEART_BEAT - setup_heartbeat(); -#endif - microblaze_clocksource_init(); - microblaze_clockevent_init(); - timer_initialized = 1; -} - -unsigned long long notrace sched_clock(void) -{ - if (timer_initialized) { - struct clocksource *cs = &clocksource_microblaze; - - cycle_t cyc = cnt32_to_63(cs->read(NULL)) & LLONG_MAX; - return clocksource_cyc2ns(cyc, cs->mult, cs->shift); - } - return 0; -} |