2 * carl9170 firmware - used by the ar9170 wireless device
4 * Clock, Timer & Timing
6 * Copyright (c) 2000-2005 ZyDAS Technology Corporation
7 * Copyright (c) 2007-2009 Atheros Communications, Inc.
8 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2009, 2010 Christian Lamparter <chunkeey@googlemail.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #ifndef __CARL9170FW_TIMER_H
27 #define __CARL9170FW_TIMER_H
38 #define AR9170_TICKS_PER_MICROSECOND 80
40 static inline __inline uint32_t get_clock_counter(void)
42 return (get(AR9170_TIMER_REG_CLOCK_HIGH) << 16) | get(AR9170_TIMER_REG_CLOCK_LOW);
45 static inline __inline bool is_after_msecs(uint32_t t0, uint32_t msecs)
47 return (get_clock_counter() - t0) / (AR9170_TICKS_PER_MICROSECOND * 1000) > msecs;
50 static inline __inline void delay(uint32_t msec)
54 t1 = get_clock_counter();
56 t2 = get_clock_counter();
57 dt = (t2 - t1) / AR9170_TICKS_PER_MICROSECOND / 1000;
63 static inline __inline void udelay(uint32_t usec)
67 t1 = get_clock_counter();
69 t2 = get_clock_counter();
70 dt = (t2 - t1) / AR9170_TICKS_PER_MICROSECOND;
76 static inline void clock_set(const bool on, const enum cpu_clock_t _clock)
80 * This setting does more than just mess with the CPU Clock.
81 * So watch out, if you need _stable_ timer interrupts.
84 set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | _clock));
87 #endif /* __CARL9170FW_TIMER_H */