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 */
64extern unsigned long hpet_address;
65extern unsigned long force_hpet_address;
66extern int boot_hpet_disable;
67extern u8 hpet_blockid;
68extern int hpet_force_user;
69extern u8 hpet_msi_disable;
70extern int is_hpet_enabled(void);
71extern int hpet_enable(void);
72extern void hpet_disable(void);
73extern unsigned int hpet_readl(unsigned int a);
74extern void force_hpet_resume(void);
75
76struct irq_data;
77extern void hpet_msi_unmask(struct irq_data *data);
78extern void hpet_msi_mask(struct irq_data *data);
79struct hpet_dev;
80extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg);
81extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg);
82
83#ifdef CONFIG_PCI_MSI
84extern int default_setup_hpet_msi(unsigned int irq, unsigned int id);
85#else
86static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id)
87{
88	return -EINVAL;
89}
90#endif
91
92#ifdef CONFIG_HPET_EMULATE_RTC
93
94#include <linux/interrupt.h>
95
96typedef irqreturn_t (*rtc_irq_handler)(int interrupt, void *cookie);
97extern int hpet_mask_rtc_irq_bit(unsigned long bit_mask);
98extern int hpet_set_rtc_irq_bit(unsigned long bit_mask);
99extern int hpet_set_alarm_time(unsigned char hrs, unsigned char min,
100			       unsigned char sec);
101extern int hpet_set_periodic_freq(unsigned long freq);
102extern int hpet_rtc_dropped_irq(void);
103extern int hpet_rtc_timer_init(void);
104extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
105extern int hpet_register_irq_handler(rtc_irq_handler handler);
106extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
107
108#endif /* CONFIG_HPET_EMULATE_RTC */
109
110#else /* CONFIG_HPET_TIMER */
111
112static inline int hpet_enable(void) { return 0; }
113static inline int is_hpet_enabled(void) { return 0; }
114#define hpet_readl(a) 0
115#define default_setup_hpet_msi	NULL
116
117#endif
118#endif /* _ASM_X86_HPET_H */
119