diff options
Diffstat (limited to 'src/soc/qualcomm/ipq806x/timer.c')
| -rw-r--r-- | src/soc/qualcomm/ipq806x/timer.c | 145 |
1 files changed, 128 insertions, 17 deletions
diff --git a/src/soc/qualcomm/ipq806x/timer.c b/src/soc/qualcomm/ipq806x/timer.c index c4e250ebe1..691ccbd2c5 100644 --- a/src/soc/qualcomm/ipq806x/timer.c +++ b/src/soc/qualcomm/ipq806x/timer.c @@ -1,28 +1,139 @@ /* - * This file is part of the coreboot project. + * Copyright (c) 2012 - 2013 The Linux Foundation. All rights reserved. + * Source : APQ8064 LK boot * - * Copyright 2013 Google Inc. + * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved. * - * 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 - * the Free Software Foundation; version 2 of the License. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google, Inc. nor the names of its contributors + * may be used to endorse or promote products derived from this + * software without specific prior written permission. * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <asm/arch-ipq806x/iomap.h> +#include <asm/io.h> +#include <common.h> +#include <asm/types.h> +#include <asm/arch-ipq806x/timer.h> + +static ulong timestamp; +static ulong lastinc; + +#define GPT_FREQ_KHZ 32 +#define GPT_FREQ (GPT_FREQ_KHZ * 1000) /* 32 KHz */ + +/** + * timer_init - initialize timer + */ +int timer_init(void) +{ + writel(0, GPT_ENABLE); + writel(GPT_ENABLE_EN, GPT_ENABLE); + return 0; +} + +/** + * get_timer - returns time lapsed + * @base: base/start time * - * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + * Returns time lapsed, since the specified base time value. */ +ulong get_timer(ulong base) +{ + return get_timer_masked() - base; +} + +/** + * __udelay - generates micro second delay. + * @usec: delay duration in microseconds + * + * With 32KHz clock, minimum possible delay is 31.25 Micro seconds and + * its multiples. In Rumi GPT clock is 32 KHz + */ +void __udelay(unsigned long usec) +{ + unsigned int val; + ulong now, last; + ulong runcount; -#include <console/console.h> -#include <timer.h> -#include <delay.h> -#include <thread.h> + usec = (usec + GPT_FREQ_KHZ - 1) / GPT_FREQ_KHZ; + last = readl(GPT_COUNT_VAL); + runcount = last; + val = usec + last; + + do { + now = readl(GPT_COUNT_VAL); + if (last > now) + runcount += ((GPT_FREQ - last) + now); + else + runcount += (now - last); + last = now; + } while (runcount < val); +} -void init_timer(void) + +inline ulong gpt_to_sys_freq(unsigned int gpt) +{ + /* + * get_timer() expects the timer increments to be in terms + * of CONFIG_SYS_HZ. Convert GPT timer values to CONFIG_SYS_HZ + * units. + */ + return (((ulong)gpt) / (GPT_FREQ / CONFIG_SYS_HZ)); +} + +/** + * get_timer_masked - returns current ticks + * + * Returns the current timer ticks, since boot. + */ +ulong get_timer_masked(void) +{ + ulong now = gpt_to_sys_freq(readl(GPT_COUNT_VAL)); + + if (lastinc <= now) { /* normal mode (non roll) */ + /* normal mode */ + timestamp += now - lastinc; + /* move stamp forward with absolute diff ticks */ + } else { /* we have overflow of the count down timer */ + timestamp += now + (TIMER_LOAD_VAL - lastinc); + } + + lastinc = now; + + return timestamp; +} + +unsigned long long get_ticks(void) { + return readl(GPT_COUNT_VAL); } +/* + * Return the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + return GPT_FREQ; +} |