[linux-block.git] / include / linux / hpet.h

#ifndef	__HPET__
#define	__HPET__ 1

#include <linux/compiler.h>

/*
 * Offsets into HPET Registers
 */

struct hpet {
	u64 hpet_cap;		/* capabilities */
	u64 res0;		/* reserved */
	u64 hpet_config;	/* configuration */
	u64 res1;		/* reserved */
	u64 hpet_isr;		/* interrupt status reg */
	u64 res2[25];		/* reserved */
	union {			/* main counter */
		u64 _hpet_mc64;
		u32 _hpet_mc32;
		unsigned long _hpet_mc;
	} _u0;
	u64 res3;		/* reserved */
	struct hpet_timer {
		u64 hpet_config;	/* configuration/cap */
		union {		/* timer compare register */
			u64 _hpet_hc64;
			u32 _hpet_hc32;
			unsigned long _hpet_compare;
		} _u1;
		u64 hpet_fsb[2];	/* FSB route */
	} hpet_timers[1];
};

#define	hpet_mc		_u0._hpet_mc
#define	hpet_compare	_u1._hpet_compare

#define	HPET_MAX_TIMERS	(32)

/*
 * HPET general capabilities register
 */

#define	HPET_COUNTER_CLK_PERIOD_MASK	(0xffffffff00000000ULL)
#define	HPET_COUNTER_CLK_PERIOD_SHIFT	(32UL)
#define	HPET_VENDOR_ID_MASK		(0x00000000ffff0000ULL)
#define	HPET_VENDOR_ID_SHIFT		(16ULL)
#define	HPET_LEG_RT_CAP_MASK		(0x8000)
#define	HPET_COUNTER_SIZE_MASK		(0x2000)
#define	HPET_NUM_TIM_CAP_MASK		(0x1f00)
#define	HPET_NUM_TIM_CAP_SHIFT		(8ULL)

/*
 * HPET general configuration register
 */

#define	HPET_LEG_RT_CNF_MASK		(2UL)
#define	HPET_ENABLE_CNF_MASK		(1UL)


/*
 * Timer configuration register
 */

#define	Tn_INT_ROUTE_CAP_MASK		(0xffffffff00000000ULL)
#define	Tn_INI_ROUTE_CAP_SHIFT		(32UL)
#define	Tn_FSB_INT_DELCAP_MASK		(0x8000UL)
#define	Tn_FSB_INT_DELCAP_SHIFT		(15)
#define	Tn_FSB_EN_CNF_MASK		(0x4000UL)
#define	Tn_FSB_EN_CNF_SHIFT		(14)
#define	Tn_INT_ROUTE_CNF_MASK		(0x3e00UL)
#define	Tn_INT_ROUTE_CNF_SHIFT		(9)
#define	Tn_32MODE_CNF_MASK		(0x0100UL)
#define	Tn_VAL_SET_CNF_MASK		(0x0040UL)
#define	Tn_SIZE_CAP_MASK		(0x0020UL)
#define	Tn_PER_INT_CAP_MASK		(0x0010UL)
#define	Tn_TYPE_CNF_MASK		(0x0008UL)
#define	Tn_INT_ENB_CNF_MASK		(0x0004UL)
#define	Tn_INT_TYPE_CNF_MASK		(0x0002UL)

/*
 * Timer FSB Interrupt Route Register
 */

#define	Tn_FSB_INT_ADDR_MASK		(0xffffffff00000000ULL)
#define	Tn_FSB_INT_ADDR_SHIFT		(32UL)
#define	Tn_FSB_INT_VAL_MASK		(0x00000000ffffffffULL)

struct hpet_info {
	unsigned long hi_ireqfreq;	/* Hz */
	unsigned long hi_flags;	/* information */
	unsigned short hi_hpet;
	unsigned short hi_timer;
};

#define	HPET_INFO_PERIODIC	0x0001	/* timer is periodic */

#define	HPET_IE_ON	_IO('h', 0x01)	/* interrupt on */
#define	HPET_IE_OFF	_IO('h', 0x02)	/* interrupt off */
#define	HPET_INFO	_IOR('h', 0x03, struct hpet_info)
#define	HPET_EPI	_IO('h', 0x04)	/* enable periodic */
#define	HPET_DPI	_IO('h', 0x05)	/* disable periodic */
#define	HPET_IRQFREQ	_IOW('h', 0x6, unsigned long)	/* IRQFREQ usec */

/*
 * exported interfaces
 */

struct hpet_task {
	void (*ht_func) (void *);
	void *ht_data;
	void *ht_opaque;
};

struct hpet_data {
	unsigned long hd_phys_address;
	void __iomem *hd_address;
	unsigned short hd_nirqs;
	unsigned short hd_flags;
	unsigned int hd_state;	/* timer allocated */
	unsigned int hd_irq[HPET_MAX_TIMERS];
};

#define	HPET_DATA_PLATFORM	0x0001	/* platform call to hpet_alloc */

static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
{
	hd->hd_state |= (1 << timer);
	return;
}

int hpet_alloc(struct hpet_data *);
int hpet_register(struct hpet_task *, int);
int hpet_unregister(struct hpet_task *);
int hpet_control(struct hpet_task *, unsigned int, unsigned long);

#endif				/* !__HPET__ */
Commit	Line	Data
1da177e4 LT	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__ */