#include <linux/dw_apb_timer.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/slab.h>

Macros
#define	APBT_MIN_PERIOD 4

#define	APBT_MIN_DELTA_USEC 200

#define	APBTMR_N_LOAD_COUNT 0x00

#define	APBTMR_N_CURRENT_VALUE 0x04

#define	APBTMR_N_CONTROL 0x08

#define	APBTMR_N_EOI 0x0c

#define	APBTMR_N_INT_STATUS 0x10

#define	APBTMRS_INT_STATUS 0xa0

#define	APBTMRS_EOI 0xa4

#define	APBTMRS_RAW_INT_STATUS 0xa8

#define	APBTMRS_COMP_VERSION 0xac

#define	APBTMR_CONTROL_ENABLE (1 << 0)

#define	APBTMR_CONTROL_MODE_PERIODIC (1 << 1)

#define	APBTMR_CONTROL_INT (1 << 2)

Functions
void	dw_apb_clockevent_pause (struct dw_apb_clock_event_device *dw_ced)

: The name used for the timer and the IRQ for it.
dw_apb_clockevent_init() - use an APB timer as a clock_event_device : The CPU the events will be targeted at. : The rating to give the timer. : I/O base for the timer registers. : The interrupt number to use for the timer. : The frequency that the timer counts at. This creates a clock_event_device for using with the generic clock layer but does not start and register it. This should be done with dw_apb_clockevent_register() as the next step. If this is the first time it has been called for a timer then the IRQ will be requested, if not it just be enabled to allow CPU hotplug to avoid repeatedly requesting and releasing the IRQ.
struct dw_apb_clock_event_device *	dw_apb_clockevent_init (int cpu, const char name, unsigned rating, void __iomem base, int irq, unsigned long freq)

void	dw_apb_clockevent_resume (struct dw_apb_clock_event_device *dw_ced)

void	dw_apb_clockevent_stop (struct dw_apb_clock_event_device *dw_ced)

void	dw_apb_clockevent_register (struct dw_apb_clock_event_device *dw_ced)

void	dw_apb_clocksource_start (struct dw_apb_clocksource *dw_cs)

: The name for the clocksource.
dw_apb_clocksource_init() - use an APB timer as a clocksource. : The rating to give the clocksource. : The I/O base for the timer registers. : The frequency that the timer counts at. This creates a clocksource using an APB timer but does not yet register it with the clocksource system. This should be done with dw_apb_clocksource_register() as the next step.
struct dw_apb_clocksource *	dw_apb_clocksource_init (unsigned rating, const char name, void __iomem base, unsigned long freq)

void	dw_apb_clocksource_register (struct dw_apb_clocksource *dw_cs)

cycle_t	dw_apb_clocksource_read (struct dw_apb_clocksource *dw_cs)

void	dw_apb_clocksource_unregister (struct dw_apb_clocksource *dw_cs)

Macro Definition Documentation

#define APBT_MIN_DELTA_USEC 200

Definition at line 22 of file dw_apb_timer.c.

#define APBT_MIN_PERIOD 4

Definition at line 21 of file dw_apb_timer.c.

#define APBTMR_CONTROL_ENABLE (1 << 0)

Definition at line 35 of file dw_apb_timer.c.

#define APBTMR_CONTROL_INT (1 << 2)

Definition at line 38 of file dw_apb_timer.c.

#define APBTMR_CONTROL_MODE_PERIODIC (1 << 1)

Definition at line 37 of file dw_apb_timer.c.

#define APBTMR_N_CONTROL 0x08

Definition at line 26 of file dw_apb_timer.c.

#define APBTMR_N_CURRENT_VALUE 0x04

Definition at line 25 of file dw_apb_timer.c.

#define APBTMR_N_EOI 0x0c

Definition at line 27 of file dw_apb_timer.c.

#define APBTMR_N_INT_STATUS 0x10

Definition at line 28 of file dw_apb_timer.c.

#define APBTMR_N_LOAD_COUNT 0x00

Definition at line 24 of file dw_apb_timer.c.

#define APBTMRS_COMP_VERSION 0xac

Definition at line 33 of file dw_apb_timer.c.

#define APBTMRS_EOI 0xa4

Definition at line 31 of file dw_apb_timer.c.

#define APBTMRS_INT_STATUS 0xa0

Definition at line 30 of file dw_apb_timer.c.

#define APBTMRS_RAW_INT_STATUS 0xa8

Definition at line 32 of file dw_apb_timer.c.

Function Documentation

struct dw_apb_clock_event_device* dw_apb_clockevent_init	(	int	cpu,
		const char *	name,
		unsigned	rating,
		void __iomem *	base,
		int	irq,
		unsigned long	freq
	)

read

Definition at line 215 of file dw_apb_timer.c.

void dw_apb_clockevent_pause ( struct dw_apb_clock_event_device * dw_ced )

dw_apb_clockevent_pause() - stop the clock_event_device from running

: The APB clock to stop generating events.

Definition at line 76 of file dw_apb_timer.c.

void dw_apb_clockevent_register ( struct dw_apb_clock_event_device * dw_ced )

dw_apb_clockevent_register() - register the clock with the generic layer

: The APB clock to register as a clock_event_device.

Definition at line 285 of file dw_apb_timer.c.

void dw_apb_clockevent_resume ( struct dw_apb_clock_event_device * dw_ced )

dw_apb_clockevent_resume() - resume a clock that has been paused.

: The APB clock to resume.

Definition at line 265 of file dw_apb_timer.c.

void dw_apb_clockevent_stop ( struct dw_apb_clock_event_device * dw_ced )

dw_apb_clockevent_stop() - stop the clock_event_device and release the IRQ.

: The APB clock to stop generating the events.

Definition at line 275 of file dw_apb_timer.c.

struct dw_apb_clocksource* dw_apb_clocksource_init	(	unsigned	rating,
		const char *	name,
		void __iomem *	base,
		unsigned long	freq
	)

read

Definition at line 351 of file dw_apb_timer.c.

cycle_t dw_apb_clocksource_read ( struct dw_apb_clocksource * dw_cs )

dw_apb_clocksource_read() - read the current value of a clocksource.

: The clocksource to read.

Definition at line 386 of file dw_apb_timer.c.

void dw_apb_clocksource_register ( struct dw_apb_clocksource * dw_cs )

dw_apb_clocksource_register() - register the APB clocksource.

: The clocksource to register.

Definition at line 376 of file dw_apb_timer.c.

void dw_apb_clocksource_start ( struct dw_apb_clocksource * dw_cs )

dw_apb_clocksource_start() - start the clocksource counting.

: The clocksource to start.

This is used to start the clocksource before registration and can be used to enable calibration of timers.

Definition at line 300 of file dw_apb_timer.c.

void dw_apb_clocksource_unregister ( struct dw_apb_clocksource * dw_cs )

dw_apb_clocksource_unregister() - unregister and free a clocksource.

: The clocksource to unregister/free.

Definition at line 396 of file dw_apb_timer.c.

Macros

Functions

Macro Definition Documentation

Function Documentation