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 2009-2011 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, see <http://www.gnu.org/licenses/>.
25 #ifndef __CARL9170FW_TIMER_H
26 #define __CARL9170FW_TIMER_H
37 static inline __inline uint32_t get_clock_counter(void)
39 return (get(AR9170_TIMER_REG_CLOCK_HIGH) << 16) | get(AR9170_TIMER_REG_CLOCK_LOW);
43 * works only up to 97 secs [44 MHz] or 107 secs for 40 MHz
44 * Also, the delay wait will be affected by 2.4GHz<->5GHz
47 static inline __inline bool is_after_msecs(const uint32_t t0, const uint32_t msecs)
49 return ((get_clock_counter() - t0) / 1000) > (msecs * fw.ticks_per_usec);
53 * Note: Be careful with [u]delay. They won't service the
54 * hardware watchdog timer. It might trigger if you
55 * wait long enough. Also they don't terminate if sec is
56 * above 97 sec [44MHz] or more than 107 sec [40MHz].
58 static inline __inline void delay(const uint32_t msec)
60 uint32_t t1, t2, dt, wt;
62 wt = msec * fw.ticks_per_usec;
64 t1 = get_clock_counter();
66 t2 = get_clock_counter();
67 dt = (t2 - t1) / 1000;
73 static inline __inline void udelay(const uint32_t usec)
77 t1 = get_clock_counter();
79 t2 = get_clock_counter();
81 if (dt >= (usec * fw.ticks_per_usec))
86 void clock_set(enum cpu_clock_t _clock, bool on);
87 void handle_timer(void);
88 void timer_init(const unsigned int timer, const unsigned int interval);
90 #endif /* __CARL9170FW_TIMER_H */