* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2009, 2010 Christian Lamparter <chunkeey@googlemail.com>
+ * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __CARL9170FW_TIMER_H
AHB_80_88MHZ = 3
};
-#define AR9170_TICKS_PER_MICROSECOND 80
-
-void handle_timer(void);
-void timer_init(const unsigned int timer, const unsigned int interval);
-void clock_set(const bool on, const enum cpu_clock_t _clock);
-
static inline __inline uint32_t get_clock_counter(void)
{
return (get(AR9170_TIMER_REG_CLOCK_HIGH) << 16) | get(AR9170_TIMER_REG_CLOCK_LOW);
}
-static inline __inline bool is_after_msecs(uint32_t t0, uint32_t msecs)
+/*
+ * works only up to 97 secs [44 MHz] or 107 secs for 40 MHz
+ * Also, the delay wait will be affected by 2.4GHz<->5GHz
+ * band changes.
+ */
+static inline __inline bool is_after_msecs(const uint32_t t0, const uint32_t msecs)
{
- return (get_clock_counter() - t0) / (AR9170_TICKS_PER_MICROSECOND * 1000) > msecs;
+ return ((get_clock_counter() - t0) / 1000) > (msecs * fw.ticks_per_usec);
}
-static inline __inline void delay(uint32_t msec)
+/*
+ * Note: Be careful with [u]delay. They won't service the
+ * hardware watchdog timer. It might trigger if you
+ * wait long enough. Also they don't terminate if sec is
+ * above 97 sec [44MHz] or more than 107 sec [40MHz].
+ */
+static inline __inline void delay(const uint32_t msec)
{
- uint32_t t1, t2, dt;
+ uint32_t t1, t2, dt, wt;
+
+ wt = msec * fw.ticks_per_usec;
t1 = get_clock_counter();
while (1) {
t2 = get_clock_counter();
- dt = (t2 - t1) / AR9170_TICKS_PER_MICROSECOND / 1000;
- if (dt >= msec)
+ dt = (t2 - t1) / 1000;
+ if (dt >= wt)
break;
}
}
-static inline __inline void udelay(uint32_t usec)
+static inline __inline void udelay(const uint32_t usec)
{
uint32_t t1, t2, dt;
t1 = get_clock_counter();
while (1) {
t2 = get_clock_counter();
- dt = (t2 - t1) / AR9170_TICKS_PER_MICROSECOND;
- if (dt >= usec)
+ dt = (t2 - t1);
+ if (dt >= (usec * fw.ticks_per_usec))
break;
}
}
+void clock_set(enum cpu_clock_t _clock, bool on);
+void handle_timer(void);
+void timer_init(const unsigned int timer, const unsigned int interval);
+
#endif /* __CARL9170FW_TIMER_H */