diff options
Diffstat (limited to 'lib_sh')
| -rw-r--r-- | lib_sh/Makefile | 6 | ||||
| -rw-r--r-- | lib_sh/time.c | 83 | ||||
| -rw-r--r-- | lib_sh/time_sh2.c | 111 |
3 files changed, 182 insertions, 18 deletions
diff --git a/lib_sh/Makefile b/lib_sh/Makefile index 4034381..f7c6479 100644 --- a/lib_sh/Makefile +++ b/lib_sh/Makefile @@ -26,7 +26,11 @@ SOBJS-y += COBJS-y += board.o COBJS-y += bootm.o -# COBJS-y += time.o +ifeq ($(CONFIG_SH2),y) +COBJS-y += time_sh2.o +else +COBJS-y += time.o +endif SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) diff --git a/lib_sh/time.c b/lib_sh/time.c index e637e95..2bd7715 100644 --- a/lib_sh/time.c +++ b/lib_sh/time.c @@ -1,6 +1,9 @@ /* - * Copyright (c) 2007 - * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * (C) Copyright 2007-2008 + * 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. @@ -23,50 +26,96 @@ #include <common.h> #include <asm/processor.h> +#include <asm/io.h> + +#define TMU_MAX_COUNTER (~0UL) +static int clk_adj = 1; static void tmu_timer_start (unsigned int timer) { if (timer > 2) return; + writeb(readb(TSTR) | (1 << timer), TSTR); +} - *((volatile unsigned char *) TSTR0) |= (1 << timer); +static void tmu_timer_stop (unsigned int timer) +{ + if (timer > 2) + return; + writeb(readb(TSTR) & ~(1 << timer), TSTR); } int timer_init (void) { - *(volatile u16 *)TCR0 = 0; + /* Divide clock by TMU_CLK_DIVIDER */ + u16 bit = 0; + switch( TMU_CLK_DIVIDER ){ + case 4: + bit = 0; + break; + case 16: + bit = 1; + break; + case 64: bit = 2; + break; + case 256: + bit = 3; + break; + case 1024: + bit = 4; + break; + default: + bit = 0; + break; + } + writew(readw(TCR0) | bit, TCR0); + + /* Clock adjustment calc */ + clk_adj = (int)(1.0/((1.0/CONFIG_SYS_HZ)*1000000)); + if (clk_adj < 1) + clk_adj = 1; + + tmu_timer_stop(0); + tmu_timer_start(0); - tmu_timer_start (0); return 0; } unsigned long long get_ticks (void) { - return (0 - *((volatile unsigned int *) TCNT0)); + return 0 - readl(TCNT0); } -unsigned long get_timer (unsigned long base) +static unsigned long get_usec (void) { - return ((0 - *((volatile unsigned int *) TCNT0)) - base); + return (0 - readl(TCNT0)); } -void set_timer (unsigned long t) +void udelay (unsigned long usec) { - *((volatile unsigned int *) TCNT0) = (0 - t); + unsigned int start = get_usec(); + unsigned int end = start + (usec * clk_adj); + + while (get_usec() < end) + continue; } -void reset_timer (void) +unsigned long get_timer (unsigned long base) { - set_timer (0); + /* return msec */ + return ((get_usec()/clk_adj)/1000) - base; } -void udelay (unsigned long usec) +void set_timer (unsigned long t) { - unsigned int start = get_timer (0); - unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000)); + writel((0 - t), TCNT0); +} - while (get_timer (0) < end) - continue; +void reset_timer (void) +{ + tmu_timer_stop(0); + set_timer (0); + tmu_timer_start(0); } unsigned long get_tbclk (void) diff --git a/lib_sh/time_sh2.c b/lib_sh/time_sh2.c new file mode 100644 index 0000000..fcbb921 --- /dev/null +++ b/lib_sh/time_sh2.c @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2007,2008 Nobobuhiro Iwamatsu <iwamatsu@nigauri.org> + * Copyright (C) 2008 Renesas Solutions Corp. + * + * (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 <asm/io.h> +#include <asm/processor.h> + +#define CMT_CMCSR_INIT 0x0001 /* PCLK/32 */ +#define CMT_CMCSR_CALIB 0x0000 +#define CMT_MAX_COUNTER (0xFFFFFFFF) +#define CMT_TIMER_RESET (0xFFFF) + +static vu_long cmt0_timer; + +static void cmt_timer_start(unsigned int timer) +{ + writew(readw(CMSTR) | 0x01, CMSTR); +} + +static void cmt_timer_stop(unsigned int timer) +{ + writew(readw(CMSTR) & ~0x01, CMSTR); +} + +int timer_init(void) +{ + cmt0_timer = 0; + /* Divide clock by 32 */ + readw(CMCSR_0); + writew(CMT_CMCSR_INIT, CMCSR_0); + + /* User Device 0 only */ + cmt_timer_stop(0); + set_timer(CMT_TIMER_RESET); + cmt_timer_start(0); + + return 0; +} + +unsigned long long get_ticks(void) +{ + return cmt0_timer; +} + +static vu_long cmcnt; +ulong get_timer(ulong base) +{ + ulong data = readw(CMCNT_0); + + if (data >= cmcnt) + cmcnt = data - cmcnt; + else + cmcnt = (CMT_TIMER_RESET - cmcnt) + data; + + if ((cmt0_timer + cmcnt) > CMT_MAX_COUNTER) + cmt0_timer = ((cmt0_timer + cmcnt) - CMT_MAX_COUNTER); + else + cmt0_timer += cmcnt; + + cmcnt = data; + return cmt0_timer - base; +} + +void set_timer(ulong t) +{ + writew((u16) t, CMCOR_0); +} + +void reset_timer(void) +{ + cmt_timer_stop(0); + set_timer(CMT_TIMER_RESET); + cmt0_timer = 0; + cmt_timer_start(0); +} + +void udelay(unsigned long usec) +{ + unsigned int start = get_timer(0); + + while (get_timer((ulong) start) < (usec * (CONFIG_SYS_HZ / 1000000))) + continue; +} + +unsigned long get_tbclk(void) +{ + return CONFIG_SYS_HZ; +} |