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 apbt_quick_calibrate(void)64static inline unsigned long apbt_quick_calibrate(void) {return 0; } apbt_time_init(void)65static inline void apbt_time_init(void) {return 0; } 66 67 #endif 68 #endif /* ASM_X86_APBT_H */ 69