* (C) Copyright 2009
* Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
- * (C) Copyright 2007-2010
+ * (C) Copyright 2007-2012
* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <div64.h>
#include <asm/processor.h>
-#include <asm/clk.h>
#include <asm/io.h>
+#include <sh_tmu.h>
-#define TMU_MAX_COUNTER (~0UL)
+#define TCR_TPSC 0x07
-static ulong timer_freq;
-static unsigned long last_tcnt;
-static unsigned long long overflow_ticks;
+static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE;
-static inline unsigned long long tick_to_time(unsigned long long tick)
+unsigned long get_tbclk(void)
{
- tick *= CONFIG_SYS_HZ;
- do_div(tick, timer_freq);
-
- return tick;
+ u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+ return get_tmu0_clk_rate() >> ((tmu_bit + 1) * 2);
}
-static inline unsigned long long usec_to_tick(unsigned long long usec)
+unsigned long timer_read_counter(void)
{
- usec *= timer_freq;
- do_div(usec, 1000000);
-
- return usec;
+ return ~readl(&tmu->tcnt0);
}
-static void tmu_timer_start (unsigned int timer)
+static void tmu_timer_start(unsigned int timer)
{
if (timer > 2)
return;
- writeb(readb(TSTR) | (1 << timer), TSTR);
+ writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr);
}
-static void tmu_timer_stop (unsigned int timer)
+static void tmu_timer_stop(unsigned int timer)
{
if (timer > 2)
return;
- writeb(readb(TSTR) & ~(1 << timer), TSTR);
+ writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr);
}
-int timer_init (void)
+int timer_init(void)
{
- /* Divide clock by CONFIG_SYS_TMU_CLK_DIV */
- u16 bit = 0;
-
- switch (CONFIG_SYS_TMU_CLK_DIV) {
- case 1024:
- bit = 4;
- break;
- case 256:
- bit = 3;
- break;
- case 64:
- bit = 2;
- break;
- case 16:
- bit = 1;
- break;
- case 4:
- default:
- break;
- }
- writew(readw(TCR0) | bit, TCR0);
-
- /* Calc clock rate */
- timer_freq = get_tmu0_clk_rate() >> ((bit + 1) * 2);
+ u16 tmu_bit = (ffs(CONFIG_SYS_TMU_CLK_DIV) >> 1) - 1;
+ writew((readw(&tmu->tcr0) & ~TCR_TPSC) | tmu_bit, &tmu->tcr0);
tmu_timer_stop(0);
tmu_timer_start(0);
- last_tcnt = 0;
- overflow_ticks = 0;
-
return 0;
}
-unsigned long long get_ticks (void)
-{
- unsigned long tcnt = 0 - readl(TCNT0);
-
- if (last_tcnt > tcnt) /* overflow */
- overflow_ticks++;
- last_tcnt = tcnt;
-
- return (overflow_ticks << 32) | tcnt;
-}
-
-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*/;
-}
-
-unsigned long get_timer (unsigned long base)
-{
- /* return msec */
- return tick_to_time(get_ticks()) - base;
-}
-
-unsigned long get_tbclk (void)
-{
- return timer_freq;
-}