include/linux/hpet.h

   1 #ifndef __HPET__
   2 #define __HPET__ 1
   3
   4 #include <linux/compiler.h>
   5
   6 /*
   7  * Offsets into HPET Registers
   8  */
   9
  10 struct hpet {
  11         u64 hpet_cap;           /* capabilities */
  12         u64 res0;               /* reserved */
  13         u64 hpet_config;        /* configuration */
  14         u64 res1;               /* reserved */
  15         u64 hpet_isr;           /* interrupt status reg */
  16         u64 res2[25];           /* reserved */
  17         union {                 /* main counter */
  18                 u64 _hpet_mc64;
  19                 u32 _hpet_mc32;
  20                 unsigned long _hpet_mc;
  21         } _u0;
  22         u64 res3;               /* reserved */
  23         struct hpet_timer {
  24                 u64 hpet_config;        /* configuration/cap */
  25                 union {         /* timer compare register */
  26                         u64 _hpet_hc64;
  27                         u32 _hpet_hc32;
  28                         unsigned long _hpet_compare;
  29                 } _u1;
  30                 u64 hpet_fsb[2];        /* FSB route */
  31         } hpet_timers[1];
  32 };
  33
  34 #define hpet_mc         _u0._hpet_mc
  35 #define hpet_compare    _u1._hpet_compare
  36
  37 #define HPET_MAX_TIMERS (32)
  38
  39 /*
  40  * HPET general capabilities register
  41  */
  42
  43 #define HPET_COUNTER_CLK_PERIOD_MASK    (0xffffffff00000000ULL)
  44 #define HPET_COUNTER_CLK_PERIOD_SHIFT   (32UL)
  45 #define HPET_VENDOR_ID_MASK             (0x00000000ffff0000ULL)
  46 #define HPET_VENDOR_ID_SHIFT            (16ULL)
  47 #define HPET_LEG_RT_CAP_MASK            (0x8000)
  48 #define HPET_COUNTER_SIZE_MASK          (0x2000)
  49 #define HPET_NUM_TIM_CAP_MASK           (0x1f00)
  50 #define HPET_NUM_TIM_CAP_SHIFT          (8ULL)
  51
  52 /*
  53  * HPET general configuration register
  54  */
  55
  56 #define HPET_LEG_RT_CNF_MASK            (2UL)
  57 #define HPET_ENABLE_CNF_MASK            (1UL)
  58
  59
  60 /*
  61  * Timer configuration register
  62  */
  63
  64 #define Tn_INT_ROUTE_CAP_MASK           (0xffffffff00000000ULL)
  65 #define Tn_INI_ROUTE_CAP_SHIFT          (32UL)
  66 #define Tn_FSB_INT_DELCAP_MASK          (0x8000UL)
  67 #define Tn_FSB_INT_DELCAP_SHIFT         (15)
  68 #define Tn_FSB_EN_CNF_MASK              (0x4000UL)
  69 #define Tn_FSB_EN_CNF_SHIFT             (14)
  70 #define Tn_INT_ROUTE_CNF_MASK           (0x3e00UL)
  71 #define Tn_INT_ROUTE_CNF_SHIFT          (9)
  72 #define Tn_32MODE_CNF_MASK              (0x0100UL)
  73 #define Tn_VAL_SET_CNF_MASK             (0x0040UL)
  74 #define Tn_SIZE_CAP_MASK                (0x0020UL)
  75 #define Tn_PER_INT_CAP_MASK             (0x0010UL)
  76 #define Tn_TYPE_CNF_MASK                (0x0008UL)
  77 #define Tn_INT_ENB_CNF_MASK             (0x0004UL)
  78 #define Tn_INT_TYPE_CNF_MASK            (0x0002UL)
  79
  80 /*
  81  * Timer FSB Interrupt Route Register
  82  */
  83
  84 #define Tn_FSB_INT_ADDR_MASK            (0xffffffff00000000ULL)
  85 #define Tn_FSB_INT_ADDR_SHIFT           (32UL)
  86 #define Tn_FSB_INT_VAL_MASK             (0x00000000ffffffffULL)
  87
  88 struct hpet_info {
  89         unsigned long hi_ireqfreq;      /* Hz */
  90         unsigned long hi_flags; /* information */
  91         unsigned short hi_hpet;
  92         unsigned short hi_timer;
  93 };
  94
  95 #define HPET_INFO_PERIODIC      0x0001  /* timer is periodic */
  96
  97 #define HPET_IE_ON      _IO('h', 0x01)  /* interrupt on */
  98 #define HPET_IE_OFF     _IO('h', 0x02)  /* interrupt off */
  99 #define HPET_INFO       _IOR('h', 0x03, struct hpet_info)
 100 #define HPET_EPI        _IO('h', 0x04)  /* enable periodic */
 101 #define HPET_DPI        _IO('h', 0x05)  /* disable periodic */
 102 #define HPET_IRQFREQ    _IOW('h', 0x6, unsigned long)   /* IRQFREQ usec */
 103
 104 /*
 105  * exported interfaces
 106  */
 107
 108 struct hpet_task {
 109         void (*ht_func) (void *);
 110         void *ht_data;
 111         void *ht_opaque;
 112 };
 113
 114 struct hpet_data {
 115         unsigned long hd_phys_address;
 116         void __iomem *hd_address;
 117         unsigned short hd_nirqs;
 118         unsigned short hd_flags;
 119         unsigned int hd_state;  /* timer allocated */
 120         unsigned int hd_irq[HPET_MAX_TIMERS];
 121 };
 122
 123 #define HPET_DATA_PLATFORM      0x0001  /* platform call to hpet_alloc */
 124
 125 static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
 126 {
 127         hd->hd_state |= (1 << timer);
 128         return;
 129 }
 130
 131 int hpet_alloc(struct hpet_data *);
 132 int hpet_register(struct hpet_task *, int);
 133 int hpet_unregister(struct hpet_task *);
 134 int hpet_control(struct hpet_task *, unsigned int, unsigned long);
 135
 136 #endif                          /* !__HPET__ */