upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
142 lines
3.3 KiB
142 lines
3.3 KiB
/*
|
|
* (C) Copyright 2007-2008
|
|
* Stelian Pop <stelian.pop@leadtechdesign.com>
|
|
* Lead Tech Design <www.leadtechdesign.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_pit.h>
|
|
#include <asm/arch/at91_pmc.h>
|
|
#include <asm/arch/clk.h>
|
|
#include <asm/arch/io.h>
|
|
#include <div64.h>
|
|
|
|
/*
|
|
* We're using the AT91CAP9/SAM9 PITC in 32 bit mode, by
|
|
* setting the 20 bit counter period to its maximum (0xfffff).
|
|
*/
|
|
#define TIMER_LOAD_VAL 0xfffff
|
|
|
|
static ulong timestamp;
|
|
static ulong lastinc;
|
|
static ulong timer_freq;
|
|
|
|
static inline unsigned long long tick_to_time(unsigned long long tick)
|
|
{
|
|
tick *= CONFIG_SYS_HZ;
|
|
do_div(tick, timer_freq);
|
|
|
|
return tick;
|
|
}
|
|
|
|
static inline unsigned long long usec_to_tick(unsigned long long usec)
|
|
{
|
|
usec *= timer_freq;
|
|
do_div(usec, 1000000);
|
|
|
|
return usec;
|
|
}
|
|
|
|
/* nothing really to do with interrupts, just starts up a counter. */
|
|
int timer_init(void)
|
|
{
|
|
at91_pmc_t *pmc = (at91_pmc_t *) AT91_PMC_BASE;
|
|
at91_pit_t *pit = (at91_pit_t *) AT91_PIT_BASE;
|
|
/*
|
|
* Enable PITC Clock
|
|
* The clock is already enabled for system controller in boot
|
|
*/
|
|
writel(1 << AT91_ID_SYS, &pmc->pcer);
|
|
|
|
/* Enable PITC */
|
|
writel(TIMER_LOAD_VAL | AT91_PIT_MR_EN , &pit->mr);
|
|
|
|
reset_timer_masked();
|
|
|
|
timer_freq = get_mck_clk_rate() >> 4;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* timer without interrupts
|
|
*/
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
at91_pit_t *pit = (at91_pit_t *) AT91_PIT_BASE;
|
|
|
|
ulong now = readl(&pit->piir);
|
|
|
|
if (now >= lastinc) /* normal mode (non roll) */
|
|
/* move stamp forward with absolut diff ticks */
|
|
timestamp += (now - lastinc);
|
|
else /* we have rollover of incrementer */
|
|
timestamp += (0xFFFFFFFF - lastinc) + now;
|
|
lastinc = now;
|
|
return timestamp;
|
|
}
|
|
|
|
void reset_timer_masked(void)
|
|
{
|
|
/* reset time */
|
|
at91_pit_t *pit = (at91_pit_t *) AT91_PIT_BASE;
|
|
|
|
/* capture current incrementer value time */
|
|
lastinc = readl(&pit->piir);
|
|
timestamp = 0; /* start "advancing" time stamp from 0 */
|
|
}
|
|
|
|
ulong get_timer_masked(void)
|
|
{
|
|
return tick_to_time(get_ticks());
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
unsigned long long tmp;
|
|
ulong tmo;
|
|
|
|
tmo = usec_to_tick(usec);
|
|
tmp = get_ticks() + tmo; /* get current timestamp */
|
|
|
|
while (get_ticks() < tmp) /* loop till event */
|
|
/*NOP*/;
|
|
}
|
|
|
|
void reset_timer(void)
|
|
{
|
|
reset_timer_masked();
|
|
}
|
|
|
|
ulong get_timer(ulong base)
|
|
{
|
|
return get_timer_masked () - base;
|
|
}
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (timebase clock frequency).
|
|
* On ARM it returns the number of timer ticks per second.
|
|
*/
|
|
ulong get_tbclk(void)
|
|
{
|
|
return timer_freq;
|
|
}
|
|
|