Some rmobile SoC has TMU base timer function. This supports TMU.
Signed-off-by: Nobuhiro Iwamatsu nobuhiro.iwamatsu.yj@renesas.com --- V2: Remove unused variable.
arch/arm/cpu/armv7/rmobile/Makefile | 4 +- arch/arm/cpu/armv7/rmobile/timer_tmu.c | 161 +++++++++++++++++++++++++ arch/arm/include/asm/arch-rmobile/timer_tmu.h | 51 ++++++++ 3 files changed, 215 insertions(+), 1 deletion(-) create mode 100644 arch/arm/cpu/armv7/rmobile/timer_tmu.c create mode 100644 arch/arm/include/asm/arch-rmobile/timer_tmu.h
diff --git a/arch/arm/cpu/armv7/rmobile/Makefile b/arch/arm/cpu/armv7/rmobile/Makefile index f70af58..154a5da 100644 --- a/arch/arm/cpu/armv7/rmobile/Makefile +++ b/arch/arm/cpu/armv7/rmobile/Makefile @@ -26,7 +26,9 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(SOC).o
SOBJS = lowlevel_init.o -COBJS += cpu_info.o board.o timer.o +COBJS += cpu_info.o board.o +COBJS-$(CONFIG_GLOBAL_TIMER) += timer.o +COBJS-$(CONFIG_TMU_TIMER) += timer_tmu.o COBJS-$(CONFIG_SH73A0) += pfc-sh73a0.o cpu_info-sh73a0.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/rmobile/timer_tmu.c b/arch/arm/cpu/armv7/rmobile/timer_tmu.c new file mode 100644 index 0000000..78aee07 --- /dev/null +++ b/arch/arm/cpu/armv7/rmobile/timer_tmu.c @@ -0,0 +1,161 @@ +/* + * (C) Copyright 2012 + * Renesas Solutions Corp. + * + * This code is based on arch/sh/lib/time.c: + * + * (C) Copyright 2009 + * Jean-Christophe PLAGNIOL-VILLARD plagnioj@jcrosoft.com + * + * (C) Copyright 2007-2010 + * 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 + */ + +#include <common.h> +#include <div64.h> +#include <asm/io.h> +#include <asm/arch/timer_tmu.h> + +static struct tmu_regs *tmu = (struct tmu_regs *)TMU_BASE; + +static unsigned long last_tcnt; +static unsigned long long overflow_ticks; +static u16 bit; + +static inline unsigned long long tick_to_time(unsigned long long tick) +{ + ulong timer_freq; + timer_freq = get_tmu0_clk_rate() >> ((bit + 1) * 2); + tick *= CONFIG_SYS_HZ; + do_div(tick, timer_freq); + + return tick; +} + +static inline unsigned long long usec_to_tick(unsigned long long usec) +{ + ulong timer_freq; + timer_freq = get_tmu0_clk_rate() >> ((bit + 1) * 2); + usec *= timer_freq; + do_div(usec, 1000000); + + return usec; +} + +static void tmu_timer_start(unsigned int timer) +{ + if (timer > 2) + return; + writeb(readb(&tmu->tstr) | (1 << timer), &tmu->tstr); +} + +static void tmu_timer_stop(unsigned int timer) +{ + if (timer > 2) + return; + writeb(readb(&tmu->tstr) & ~(1 << timer), &tmu->tstr); +} + +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(&tmu->tcr0) | 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(&tmu->tcnt0); + unsigned long ticks = tcnt; + + if (last_tcnt > tcnt) { /* overflow */ + overflow_ticks++; + ticks = (0xffffffff - last_tcnt) + tcnt; + } + + 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; +} + +void set_timer(unsigned long t) +{ + writel((0 - t), &tmu->tcnt0); +} + +void reset_timer(void) +{ + tmu_timer_stop(0); + set_timer(0); + tmu_timer_start(0); +} + +unsigned long get_tbclk(void) +{ + return get_tmu0_clk_rate() >> ((bit + 1) * 2); +} diff --git a/arch/arm/include/asm/arch-rmobile/timer_tmu.h b/arch/arm/include/asm/arch-rmobile/timer_tmu.h new file mode 100644 index 0000000..c2ff6e4 --- /dev/null +++ b/arch/arm/include/asm/arch-rmobile/timer_tmu.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2012 Renesas Solutions Corp. + * + * 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. + * + * 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 + */ + +#ifndef __TIMER_TMU_H +#define __TIMER_TMU_H + +#include <asm/types.h> + +struct tmu_regs { + u32 reserved; + u8 tstr; + u8 reserved2[3]; + u32 tcor0; + u32 tcnt0; + u16 tcr0; + u16 reserved3; + u32 tcor1; + u32 tcnt1; + u16 tcr1; + u16 reserved4; + u32 tcor2; + u32 tcnt2; + u16 tcr2; + u16 reserved5; +}; + +static inline unsigned long get_tmu0_clk_rate(void) +{ + return CONFIG_SYS_CLK_FREQ; +} + +#endif /* __TIMER_TMU_H */