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, 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 static inline __inline uint32_t get_clock_counter(void)
40 return (get(AR9170_TIMER_REG_CLOCK_HIGH) << 16) | get(AR9170_TIMER_REG_CLOCK_LOW);
44 * works only up to 97 secs [44 MHz] or 107 secs for 40 MHz
45 * Also, the delay wait will be affected by 2.4GHz<->5GHz
48 static inline __inline bool is_after_msecs(const uint32_t t0, const uint32_t msecs)
50 return ((get_clock_counter() - t0) / 1000) > (msecs * fw.ticks_per_usec);
53 static inline __inline bool is_after_usecs(const uint32_t t0, const uint32_t usecs)
55 return ((get_clock_counter() - t0)) > (usecs * fw.ticks_per_usec);
59 * Note: Be careful with [u]delay. They won't service the
60 * hardware watchdog timer. It might trigger if you
61 * wait long enough. Also they don't terminate if sec is
62 * above 97 sec [44MHz] or more than 107 sec [40MHz].
64 static inline __inline void delay(const uint32_t msec)
66 uint32_t t1, t2, dt, wt;
68 wt = msec * fw.ticks_per_usec;
70 t1 = get_clock_counter();
72 t2 = get_clock_counter();
73 dt = (t2 - t1) / 1000;
79 static inline __inline void udelay(const uint32_t usec)
83 t1 = get_clock_counter();
85 t2 = get_clock_counter();
87 if (dt >= (usec * fw.ticks_per_usec))
92 void clock_set(enum cpu_clock_t _clock, bool on);
93 #endif /* __CARL9170FW_TIMER_H */