include/linux/dw_apb_timer.h

   1 /*
   2  * (C) Copyright 2009 Intel Corporation
   3  * Author: Jacob Pan (jacob.jun.pan@intel.com)
   4  *
   5  * Shared with ARM platforms, Jamie Iles, Picochip 2011
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Support for the Synopsys DesignWare APB Timers.
  12  */
  13 #ifndef __DW_APB_TIMER_H__
  14 #define __DW_APB_TIMER_H__
  15
  16 #include <linux/clockchips.h>
  17 #include <linux/clocksource.h>
  18 #include <linux/interrupt.h>
  19
  20 #define APBTMRS_REG_SIZE       0x14
  21
  22 struct dw_apb_timer {
  23         void __iomem                            *base;
  24         unsigned long                           freq;
  25         int                                     irq;
  26 };
  27
  28 struct dw_apb_clock_event_device {
  29         struct clock_event_device               ced;
  30         struct dw_apb_timer                     timer;
  31         struct irqaction                        irqaction;
  32         void                                    (*eoi)(struct dw_apb_timer *);
  33 };
  34
  35 struct dw_apb_clocksource {
  36         struct dw_apb_timer                     timer;
  37         struct clocksource                      cs;
  38 };
  39
  40 void dw_apb_clockevent_register(struct dw_apb_clock_event_device *dw_ced);
  41 void dw_apb_clockevent_pause(struct dw_apb_clock_event_device *dw_ced);
  42 void dw_apb_clockevent_resume(struct dw_apb_clock_event_device *dw_ced);
  43 void dw_apb_clockevent_stop(struct dw_apb_clock_event_device *dw_ced);
  44
  45 struct dw_apb_clock_event_device *
  46 dw_apb_clockevent_init(int cpu, const char *name, unsigned rating,
  47                        void __iomem *base, int irq, unsigned long freq);
  48 struct dw_apb_clocksource *
  49 dw_apb_clocksource_init(unsigned rating, const char *name, void __iomem *base,
  50                         unsigned long freq);
  51 void dw_apb_clocksource_register(struct dw_apb_clocksource *dw_cs);
  52 void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
  53 cycle_t dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
  54 void dw_apb_clocksource_unregister(struct dw_apb_clocksource *dw_cs);
  55
  56 extern void dw_apb_timer_init(void);
  57 #endif /* __DW_APB_TIMER_H__ */