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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __HPET__
2#define __HPET__ 1
3
4#include <linux/compiler.h>
5
Randy Dunlap878a9f32006-03-26 01:37:23 -08006#ifdef __KERNEL__
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008/*
9 * Offsets into HPET Registers
10 */
11
12struct 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)
Thomas Gleixner5761d642008-04-04 16:26:10 +020067#define Tn_INI_ROUTE_CAP_SHIFT (32UL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070090/*
91 * exported interfaces
92 */
93
94struct hpet_task {
95 void (*ht_func) (void *);
96 void *ht_data;
97 void *ht_opaque;
98};
99
100struct 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
111static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
112{
113 hd->hd_state |= (1 << timer);
114 return;
115}
116
117int hpet_alloc(struct hpet_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
Randy Dunlap878a9f32006-03-26 01:37:23 -0800119#endif /* __KERNEL__ */
120
121struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137#endif /* !__HPET__ */