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.
162 lines
3.2 KiB
162 lines
3.2 KiB
/*
|
|
* Copyright (c) 2006
|
|
* Ingenic Semiconductor, <jlwei@ingenic.cn>
|
|
*
|
|
* 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 <config.h>
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/jz4740.h>
|
|
|
|
#define TIMER_CHAN 0
|
|
#define TIMER_FDATA 0xffff /* Timer full data value */
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static struct jz4740_tcu *tcu = (struct jz4740_tcu *)JZ4740_TCU_BASE;
|
|
|
|
void reset_timer_masked(void)
|
|
{
|
|
/* reset time */
|
|
gd->lastinc = readl(&tcu->tcnt0);
|
|
gd->tbl = 0;
|
|
}
|
|
|
|
ulong get_timer_masked(void)
|
|
{
|
|
ulong now = readl(&tcu->tcnt0);
|
|
|
|
if (gd->lastinc <= now)
|
|
gd->tbl += now - gd->lastinc; /* normal mode */
|
|
else {
|
|
/* we have an overflow ... */
|
|
gd->tbl += TIMER_FDATA + now - gd->lastinc;
|
|
}
|
|
|
|
gd->lastinc = now;
|
|
|
|
return gd->tbl;
|
|
}
|
|
|
|
void udelay_masked(unsigned long usec)
|
|
{
|
|
ulong tmo;
|
|
ulong endtime;
|
|
signed long diff;
|
|
|
|
/* normalize */
|
|
if (usec >= 1000) {
|
|
tmo = usec / 1000;
|
|
tmo *= CONFIG_SYS_HZ;
|
|
tmo /= 1000;
|
|
} else {
|
|
if (usec > 1) {
|
|
tmo = usec * CONFIG_SYS_HZ;
|
|
tmo /= 1000*1000;
|
|
} else
|
|
tmo = 1;
|
|
}
|
|
|
|
endtime = get_timer_masked() + tmo;
|
|
|
|
do {
|
|
ulong now = get_timer_masked();
|
|
diff = endtime - now;
|
|
} while (diff >= 0);
|
|
}
|
|
|
|
int timer_init(void)
|
|
{
|
|
writel(TCU_TCSR_PRESCALE256 | TCU_TCSR_EXT_EN, &tcu->tcsr0);
|
|
|
|
writel(0, &tcu->tcnt0);
|
|
writel(0, &tcu->tdhr0);
|
|
writel(TIMER_FDATA, &tcu->tdfr0);
|
|
|
|
/* mask irqs */
|
|
writel((1 << TIMER_CHAN) | (1 << (TIMER_CHAN + 16)), &tcu->tmsr);
|
|
writel(1 << TIMER_CHAN, &tcu->tscr); /* enable timer clock */
|
|
writeb(1 << TIMER_CHAN, &tcu->tesr); /* start counting up */
|
|
|
|
gd->lastinc = 0;
|
|
gd->tbl = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void reset_timer(void)
|
|
{
|
|
reset_timer_masked();
|
|
}
|
|
|
|
ulong get_timer(ulong base)
|
|
{
|
|
return get_timer_masked() - base;
|
|
}
|
|
|
|
void set_timer(ulong t)
|
|
{
|
|
gd->tbl = t;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
ulong tmo, tmp;
|
|
|
|
/* normalize */
|
|
if (usec >= 1000) {
|
|
tmo = usec / 1000;
|
|
tmo *= CONFIG_SYS_HZ;
|
|
tmo /= 1000;
|
|
} else {
|
|
if (usec >= 1) {
|
|
tmo = usec * CONFIG_SYS_HZ;
|
|
tmo /= 1000 * 1000;
|
|
} else
|
|
tmo = 1;
|
|
}
|
|
|
|
/* check for rollover during this delay */
|
|
tmp = get_timer(0);
|
|
if ((tmp + tmo) < tmp)
|
|
reset_timer_masked(); /* timer would roll over */
|
|
else
|
|
tmo += tmp;
|
|
|
|
while (get_timer_masked() < tmo)
|
|
;
|
|
}
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (read timebase as long long).
|
|
* On MIPS it just returns the timer value.
|
|
*/
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
return get_timer(0);
|
|
}
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (timebase clock frequency).
|
|
* On MIPS it returns the number of timer ticks per second.
|
|
*/
|
|
ulong get_tbclk(void)
|
|
{
|
|
return CONFIG_SYS_HZ;
|
|
}
|
|
|