diff options
Diffstat (limited to 'arch/arm/mach-pnx4008/time.c')
| -rw-r--r-- | arch/arm/mach-pnx4008/time.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/arch/arm/mach-pnx4008/time.c b/arch/arm/mach-pnx4008/time.c deleted file mode 100644 index 0cfe8af3d3b..00000000000 --- a/arch/arm/mach-pnx4008/time.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * arch/arm/mach-pnx4008/time.c - * - * PNX4008 Timers - * - * Authors: Vitaly Wool, Dmitry Chigirev, Grigory Tolstolytkin <source@mvista.com> - * - * 2005 (c) MontaVista Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/module.h> -#include <linux/kallsyms.h> -#include <linux/time.h> -#include <linux/timex.h> -#include <linux/irq.h> -#include <linux/io.h> - -#include <mach/hardware.h> -#include <asm/leds.h> -#include <asm/mach/time.h> -#include <asm/errno.h> - -#include "time.h" - -/*! Note: all timers are UPCOUNTING */ - -/*! - * Returns number of us since last clock interrupt. Note that interrupts - * will have been disabled by do_gettimeoffset() - */ -static unsigned long pnx4008_gettimeoffset(void) -{ - u32 ticks_to_match = - __raw_readl(HSTIM_MATCH0) - __raw_readl(HSTIM_COUNTER); - u32 elapsed = LATCH - ticks_to_match; - return (elapsed * (tick_nsec / 1000)) / LATCH; -} - -/*! - * IRQ handler for the timer - */ -static irqreturn_t pnx4008_timer_interrupt(int irq, void *dev_id) -{ - if (__raw_readl(HSTIM_INT) & MATCH0_INT) { - - do { - timer_tick(); - - /* - * this algorithm takes care of possible delay - * for this interrupt handling longer than a normal - * timer period - */ - __raw_writel(__raw_readl(HSTIM_MATCH0) + LATCH, - HSTIM_MATCH0); - __raw_writel(MATCH0_INT, HSTIM_INT); /* clear interrupt */ - - /* - * The goal is to keep incrementing HSTIM_MATCH0 - * register until HSTIM_MATCH0 indicates time after - * what HSTIM_COUNTER indicates. - */ - } while ((signed) - (__raw_readl(HSTIM_MATCH0) - - __raw_readl(HSTIM_COUNTER)) < 0); - } - - return IRQ_HANDLED; -} - -static struct irqaction pnx4008_timer_irq = { - .name = "PNX4008 Tick Timer", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, - .handler = pnx4008_timer_interrupt -}; - -/*! - * Set up timer and timer interrupt. - */ -static __init void pnx4008_setup_timer(void) -{ - __raw_writel(RESET_COUNT, MSTIM_CTRL); - while (__raw_readl(MSTIM_COUNTER)) ; /* wait for reset to complete. 100% guarantee event */ - __raw_writel(0, MSTIM_CTRL); /* stop the timer */ - __raw_writel(0, MSTIM_MCTRL); - - __raw_writel(RESET_COUNT, HSTIM_CTRL); - while (__raw_readl(HSTIM_COUNTER)) ; /* wait for reset to complete. 100% guarantee event */ - __raw_writel(0, HSTIM_CTRL); - __raw_writel(0, HSTIM_MCTRL); - __raw_writel(0, HSTIM_CCR); - __raw_writel(12, HSTIM_PMATCH); /* scale down to 1 MHZ */ - __raw_writel(LATCH, HSTIM_MATCH0); - __raw_writel(MR0_INT, HSTIM_MCTRL); - - setup_irq(HSTIMER_INT, &pnx4008_timer_irq); - - __raw_writel(COUNT_ENAB | DEBUG_EN, HSTIM_CTRL); /*start timer, stop when JTAG active */ -} - -/* Timer Clock Control in PM register */ -#define TIMCLK_CTRL_REG IO_ADDRESS((PNX4008_PWRMAN_BASE + 0xBC)) -#define WATCHDOG_CLK_EN 1 -#define TIMER_CLK_EN 2 /* HS and MS timers? */ - -static u32 timclk_ctrl_reg_save; - -void pnx4008_timer_suspend(void) -{ - timclk_ctrl_reg_save = __raw_readl(TIMCLK_CTRL_REG); - __raw_writel(0, TIMCLK_CTRL_REG); /* disable timers */ -} - -void pnx4008_timer_resume(void) -{ - __raw_writel(timclk_ctrl_reg_save, TIMCLK_CTRL_REG); /* enable timers */ -} - -struct sys_timer pnx4008_timer = { - .init = pnx4008_setup_timer, - .offset = pnx4008_gettimeoffset, - .suspend = pnx4008_timer_suspend, - .resume = pnx4008_timer_resume, -}; - |