arch/x86/include/asm/apb_timer.h

   1 /*
   2  * apb_timer.h: Driver for Langwell APB timer based on Synopsis DesignWare
   3  *
   4  * (C) Copyright 2009 Intel Corporation
   5  * Author: Jacob Pan (jacob.jun.pan@intel.com)
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2
  10  * of the License.
  11  *
  12  * Note:
  13  */
  14
  15 #ifndef ASM_X86_APBT_H
  16 #define ASM_X86_APBT_H
  17 #include <linux/sfi.h>
  18
  19 #ifdef CONFIG_APB_TIMER
  20
  21 /* Langwell DW APB timer registers */
  22 #define APBTMR_N_LOAD_COUNT    0x00
  23 #define APBTMR_N_CURRENT_VALUE 0x04
  24 #define APBTMR_N_CONTROL       0x08
  25 #define APBTMR_N_EOI           0x0c
  26 #define APBTMR_N_INT_STATUS    0x10
  27
  28 #define APBTMRS_INT_STATUS     0xa0
  29 #define APBTMRS_EOI            0xa4
  30 #define APBTMRS_RAW_INT_STATUS 0xa8
  31 #define APBTMRS_COMP_VERSION   0xac
  32 #define APBTMRS_REG_SIZE       0x14
  33
  34 /* register bits */
  35 #define APBTMR_CONTROL_ENABLE  (1<<0)
  36 #define APBTMR_CONTROL_MODE_PERIODIC   (1<<1) /*1: periodic 0:free running */
  37 #define APBTMR_CONTROL_INT     (1<<2)
  38
  39 /* default memory mapped register base */
  40 #define LNW_SCU_ADDR           0xFF100000
  41 #define LNW_EXT_TIMER_OFFSET   0x1B800
  42 #define APBT_DEFAULT_BASE      (LNW_SCU_ADDR+LNW_EXT_TIMER_OFFSET)
  43 #define LNW_EXT_TIMER_PGOFFSET         0x800
  44
  45 /* APBT clock speed range from PCLK to fabric base, 25-100MHz */
  46 #define APBT_MAX_FREQ          50
  47 #define APBT_MIN_FREQ          1
  48 #define APBT_MMAP_SIZE         1024
  49
  50 #define APBT_DEV_USED  1
  51
  52 extern void apbt_time_init(void);
  53 extern struct clock_event_device *global_clock_event;
  54 extern unsigned long apbt_quick_calibrate(void);
  55 extern int arch_setup_apbt_irqs(int irq, int trigger, int mask, int cpu);
  56 extern void apbt_setup_secondary_clock(void);
  57
  58 extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint);
  59 extern void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr);
  60 extern int sfi_mtimer_num;
  61
  62 #else /* CONFIG_APB_TIMER */
  63
  64 static inline unsigned long apbt_quick_calibrate(void) {return 0; }
  65 static inline void apbt_time_init(void) {return 0; }
  66
  67 #endif
  68 #endif /* ASM_X86_APBT_H */