1 #ifndef __HPET__
2 #define __HPET__ 1
3
4 #include <linux/compiler.h>
5
6 #ifdef __KERNEL__
7
8 /*
9 * Offsets into HPET Registers
10 */
11
12 struct hpet {
13 u64 hpet_cap; /* capabilities */
14 u64 res0; /* reserved */
15 u64 hpet_config; /* configuration */
16 u64 res1; /* reserved */
17 u64 hpet_isr; /* interrupt status reg */
18 u64 res2[25]; /* reserved */
19 union { /* main counter */
20 u64 _hpet_mc64;
21 u32 _hpet_mc32;
22 unsigned long _hpet_mc;
23 } _u0;
24 u64 res3; /* reserved */
25 struct hpet_timer {
26 u64 hpet_config; /* configuration/cap */
27 union { /* timer compare register */
28 u64 _hpet_hc64;
29 u32 _hpet_hc32;
30 unsigned long _hpet_compare;
31 } _u1;
32 u64 hpet_fsb[2]; /* FSB route */
33 } hpet_timers[1];
34 };
35
36 #define hpet_mc _u0._hpet_mc
37 #define hpet_compare _u1._hpet_compare
38
39 #define HPET_MAX_TIMERS (32)
40
41 /*
42 * HPET general capabilities register
43 */
44
45 #define HPET_COUNTER_CLK_PERIOD_MASK (0xffffffff00000000ULL)
46 #define HPET_COUNTER_CLK_PERIOD_SHIFT (32UL)
47 #define HPET_VENDOR_ID_MASK (0x00000000ffff0000ULL)
48 #define HPET_VENDOR_ID_SHIFT (16ULL)
49 #define HPET_LEG_RT_CAP_MASK (0x8000)
50 #define HPET_COUNTER_SIZE_MASK (0x2000)
51 #define HPET_NUM_TIM_CAP_MASK (0x1f00)
52 #define HPET_NUM_TIM_CAP_SHIFT (8ULL)
53
54 /*
55 * HPET general configuration register
56 */
57
58 #define HPET_LEG_RT_CNF_MASK (2UL)
59 #define HPET_ENABLE_CNF_MASK (1UL)
60
61
62 /*
63 * Timer configuration register
64 */
65
66 #define Tn_INT_ROUTE_CAP_MASK (0xffffffff00000000ULL)
67 #define Tn_INI_ROUTE_CAP_SHIFT (32UL)
68 #define Tn_FSB_INT_DELCAP_MASK (0x8000UL)
69 #define Tn_FSB_INT_DELCAP_SHIFT (15)
70 #define Tn_FSB_EN_CNF_MASK (0x4000UL)
71 #define Tn_FSB_EN_CNF_SHIFT (14)
72 #define Tn_INT_ROUTE_CNF_MASK (0x3e00UL)
73 #define Tn_INT_ROUTE_CNF_SHIFT (9)
74 #define Tn_32MODE_CNF_MASK (0x0100UL)
75 #define Tn_VAL_SET_CNF_MASK (0x0040UL)
76 #define Tn_SIZE_CAP_MASK (0x0020UL)
77 #define Tn_PER_INT_CAP_MASK (0x0010UL)
78 #define Tn_TYPE_CNF_MASK (0x0008UL)
79 #define Tn_INT_ENB_CNF_MASK (0x0004UL)
80 #define Tn_INT_TYPE_CNF_MASK (0x0002UL)
81
82 /*
83 * Timer FSB Interrupt Route Register
84 */
85
86 #define Tn_FSB_INT_ADDR_MASK (0xffffffff00000000ULL)
87 #define Tn_FSB_INT_ADDR_SHIFT (32UL)
88 #define Tn_FSB_INT_VAL_MASK (0x00000000ffffffffULL)
89
90 /*
91 * exported interfaces
92 */
93
94 struct hpet_task {
95 void (*ht_func) (void *);
96 void *ht_data;
97 void *ht_opaque;
98 };
99
100 struct hpet_data {
101 unsigned long hd_phys_address;
102 void __iomem *hd_address;
103 unsigned short hd_nirqs;
104 unsigned short hd_flags;
105 unsigned int hd_state; /* timer allocated */
106 unsigned int hd_irq[HPET_MAX_TIMERS];
107 };
108
109 #define HPET_DATA_PLATFORM 0x0001 /* platform call to hpet_alloc */
110
111 static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
112 {
113 hd->hd_state |= (1 << timer);
114 return;
115 }
116
117 int hpet_alloc(struct hpet_data *);
118
119 #endif /* __KERNEL__ */
120
121 struct hpet_info {
122 unsigned long hi_ireqfreq; /* Hz */
123 unsigned long hi_flags; /* information */
124 unsigned short hi_hpet;
125 unsigned short hi_timer;
126 };
127
128 #define HPET_INFO_PERIODIC 0x0001 /* timer is periodic */
129
130 #define HPET_IE_ON _IO('h', 0x01) /* interrupt on */
131 #define HPET_IE_OFF _IO('h', 0x02) /* interrupt off */
132 #define HPET_INFO _IOR('h', 0x03, struct hpet_info)
133 #define HPET_EPI _IO('h', 0x04) /* enable periodic */
134 #define HPET_DPI _IO('h', 0x05) /* disable periodic */
135 #define HPET_IRQFREQ _IOW('h', 0x6, unsigned long) /* IRQFREQ usec */
136
137 #endif /* !__HPET__ */
138
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