| Ralf Baechle | 334955e | 2011-06-01 19:04:57 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| Ralf Baechle | cb2455a | 2011-06-01 19:04:58 +0100 | [diff] [blame] | 5 | * |
| 6 | * Machine specific IO port address definition for generic. |
| 7 | * Written by Osamu Tomita <tomita@cinet.co.jp> |
| Ralf Baechle | 334955e | 2011-06-01 19:04:57 +0100 | [diff] [blame] | 8 | */ |
| 9 | #ifndef __LINUX_I8253_H |
| 10 | #define __LINUX_I8253_H |
| 11 | |
| Ralf Baechle | 49cf3f2 | 2011-06-01 19:05:07 +0100 | [diff] [blame] | 12 | #include <linux/param.h> |
| Ralf Baechle | cb2455a | 2011-06-01 19:04:58 +0100 | [diff] [blame] | 13 | #include <linux/spinlock.h> |
| Ralf Baechle | 49cf3f2 | 2011-06-01 19:05:07 +0100 | [diff] [blame] | 14 | #include <linux/timex.h> |
| Ralf Baechle | 334955e | 2011-06-01 19:04:57 +0100 | [diff] [blame] | 15 | |
| Ralf Baechle | cb2455a | 2011-06-01 19:04:58 +0100 | [diff] [blame] | 16 | /* i8253A PIT registers */ |
| 17 | #define PIT_MODE 0x43 |
| 18 | #define PIT_CH0 0x40 |
| 19 | #define PIT_CH2 0x42 |
| 20 | |
| Ralf Baechle | 49cf3f2 | 2011-06-01 19:05:07 +0100 | [diff] [blame] | 21 | #define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ) |
| 22 | |
| Ralf Baechle | cb2455a | 2011-06-01 19:04:58 +0100 | [diff] [blame] | 23 | extern raw_spinlock_t i8253_lock; |
| Michael Kelley | f6939db | 2018-11-04 03:48:54 +0000 | [diff] [blame] | 24 | extern bool i8253_clear_counter_on_shutdown; |
| Thomas Gleixner | e6220bd | 2011-06-09 13:08:25 +0000 | [diff] [blame] | 25 | extern struct clock_event_device i8253_clockevent; |
| 26 | extern void clockevent_i8253_init(bool oneshot); |
| Ralf Baechle | cb2455a | 2011-06-01 19:04:58 +0100 | [diff] [blame] | 27 | |
| Ralf Baechle | 8504927 | 2011-06-01 19:05:08 +0100 | [diff] [blame] | 28 | extern void setup_pit_timer(void); |
| 29 | |
| Ralf Baechle | 334955e | 2011-06-01 19:04:57 +0100 | [diff] [blame] | 30 | #endif /* __LINUX_I8253_H */ |