arch/x86/include/asm/hpet.h

   1 #ifndef _ASM_X86_HPET_H
   2 #define _ASM_X86_HPET_H
   3
   4 #include <linux/msi.h>
   5
   6 #ifdef CONFIG_HPET_TIMER
   7
   8 #define HPET_MMAP_SIZE          1024
   9
  10 #define HPET_ID                 0x000
  11 #define HPET_PERIOD             0x004
  12 #define HPET_CFG                0x010
  13 #define HPET_STATUS             0x020
  14 #define HPET_COUNTER            0x0f0
  15
  16 #define HPET_Tn_CFG(n)          (0x100 + 0x20 * n)
  17 #define HPET_Tn_CMP(n)          (0x108 + 0x20 * n)
  18 #define HPET_Tn_ROUTE(n)        (0x110 + 0x20 * n)
  19
  20 #define HPET_T0_CFG             0x100
  21 #define HPET_T0_CMP             0x108
  22 #define HPET_T0_ROUTE           0x110
  23 #define HPET_T1_CFG             0x120
  24 #define HPET_T1_CMP             0x128
  25 #define HPET_T1_ROUTE           0x130
  26 #define HPET_T2_CFG             0x140
  27 #define HPET_T2_CMP             0x148
  28 #define HPET_T2_ROUTE           0x150
  29
  30 #define HPET_ID_REV             0x000000ff
  31 #define HPET_ID_NUMBER          0x00001f00
  32 #define HPET_ID_64BIT           0x00002000
  33 #define HPET_ID_LEGSUP          0x00008000
  34 #define HPET_ID_VENDOR          0xffff0000
  35 #define HPET_ID_NUMBER_SHIFT    8
  36 #define HPET_ID_VENDOR_SHIFT    16
  37
  38 #define HPET_CFG_ENABLE         0x001
  39 #define HPET_CFG_LEGACY         0x002
  40 #define HPET_LEGACY_8254        2
  41 #define HPET_LEGACY_RTC         8
  42
  43 #define HPET_TN_LEVEL           0x0002
  44 #define HPET_TN_ENABLE          0x0004
  45 #define HPET_TN_PERIODIC        0x0008
  46 #define HPET_TN_PERIODIC_CAP    0x0010
  47 #define HPET_TN_64BIT_CAP       0x0020
  48 #define HPET_TN_SETVAL          0x0040
  49 #define HPET_TN_32BIT           0x0100
  50 #define HPET_TN_ROUTE           0x3e00
  51 #define HPET_TN_FSB             0x4000
  52 #define HPET_TN_FSB_CAP         0x8000
  53 #define HPET_TN_ROUTE_SHIFT     9
  54
  55 /* Max HPET Period is 10^8 femto sec as in HPET spec */
  56 #define HPET_MAX_PERIOD         100000000UL
  57 /*
  58  * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
  59  * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
  60  */
  61 #define HPET_MIN_PERIOD         100000UL
  62
  63 /* hpet memory map physical address */
  64 extern unsigned long hpet_address;
  65 extern unsigned long force_hpet_address;
  66 extern bool boot_hpet_disable;
  67 extern u8 hpet_blockid;
  68 extern bool hpet_force_user;
  69 extern bool hpet_msi_disable;
  70 extern int is_hpet_enabled(void);
  71 extern int hpet_enable(void);
  72 extern void hpet_disable(void);
  73 extern unsigned int hpet_readl(unsigned int a);
  74 extern void force_hpet_resume(void);
  75
  76 struct irq_data;
  77 struct hpet_dev;
  78 struct irq_domain;
  79
  80 extern void hpet_msi_unmask(struct irq_data *data);
  81 extern void hpet_msi_mask(struct irq_data *data);
  82 extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg);
  83 extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg);
  84 extern struct irq_domain *hpet_create_irq_domain(int hpet_id);
  85 extern int hpet_assign_irq(struct irq_domain *domain,
  86                            struct hpet_dev *dev, int dev_num);
  87
  88 #ifdef CONFIG_HPET_EMULATE_RTC
  89
  90 #include <linux/interrupt.h>
  91
  92 typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie);
  93 extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
  94 extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
  95 extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
  96                                unsigned char sec);
  97 extern int hpet_set_periodic_freq(unsigned long freq);
  98 extern int hpet_rtc_dropped_irq(void);
  99 extern int hpet_rtc_timer_init(void);
 100 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 101 extern int hpet_register_irq_handler(rtc_irq_handler handler);
 102 extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
 103
 104 #endif /* CONFIG_HPET_EMULATE_RTC */
 105
 106 #else /* CONFIG_HPET_TIMER */
 107
 108 static inline int hpet_enable(void) { return 0; }
 109 static inline int is_hpet_enabled(void) { return 0; }
 110 #define hpet_readl(a) 0
 111 #define default_setup_hpet_msi  NULL
 112
 113 #endif
 114 #endif /* _ASM_X86_HPET_H */