diff options
Diffstat (limited to 'arch/arm/cpu/armv7/imx-common/timer.c')
-rw-r--r-- | arch/arm/cpu/armv7/imx-common/timer.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/arch/arm/cpu/armv7/imx-common/timer.c b/arch/arm/cpu/armv7/imx-common/timer.c deleted file mode 100644 index e2725e1a64..0000000000 --- a/arch/arm/cpu/armv7/imx-common/timer.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * (C) Copyright 2007 - * Sascha Hauer, Pengutronix - * - * (C) Copyright 2009 Freescale Semiconductor, Inc. - * - * 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 <div64.h> -#include <asm/arch/imx-regs.h> - -/* General purpose timers registers */ -struct mxc_gpt { - unsigned int control; - unsigned int prescaler; - unsigned int status; - unsigned int nouse[6]; - unsigned int counter; -}; - -static struct mxc_gpt *cur_gpt = (struct mxc_gpt *)GPT1_BASE_ADDR; - -/* General purpose timers bitfields */ -#define GPTCR_SWR (1 << 15) /* Software reset */ -#define GPTCR_FRR (1 << 9) /* Freerun / restart */ -#define GPTCR_CLKSOURCE_32 (4 << 6) /* Clock source */ -#define GPTCR_TEN 1 /* Timer enable */ -#define CLK_32KHZ 32768 /* 32Khz input */ - -DECLARE_GLOBAL_DATA_PTR; - -#define timestamp (gd->tbl) -#define lastinc (gd->lastinc) - -static inline unsigned long long tick_to_time(unsigned long long tick) -{ - tick *= CONFIG_SYS_HZ; - do_div(tick, CLK_32KHZ); - - return tick; -} - -static inline unsigned long long us_to_tick(unsigned long long usec) -{ - usec = usec * CLK_32KHZ + 999999; - do_div(usec, 1000000); - - return usec; -} - -int timer_init(void) -{ - int i; - ulong val; - - /* setup GP Timer 1 */ - __raw_writel(GPTCR_SWR, &cur_gpt->control); - - /* We have no udelay by now */ - for (i = 0; i < 100; i++) - __raw_writel(0, &cur_gpt->control); - - __raw_writel(0, &cur_gpt->prescaler); /* 32Khz */ - - /* Freerun Mode, PERCLK1 input */ - i = __raw_readl(&cur_gpt->control); - __raw_writel(i | GPTCR_CLKSOURCE_32 | GPTCR_TEN, &cur_gpt->control); - - val = __raw_readl(&cur_gpt->counter); - lastinc = val / (CLK_32KHZ / CONFIG_SYS_HZ); - timestamp = 0; - - return 0; -} - -unsigned long long get_ticks(void) -{ - ulong now = __raw_readl(&cur_gpt->counter); /* current tick value */ - - 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; -} - -ulong get_timer_masked(void) -{ - /* - * get_ticks() returns a long long (64 bit), it wraps in - * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~ - * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in - * 5 * 10^6 days - long enough. - */ - return tick_to_time(get_ticks()); -} - -ulong get_timer(ulong base) -{ - return get_timer_masked() - base; -} - -/* delay x useconds AND preserve advance timstamp value */ -void __udelay(unsigned long usec) -{ - unsigned long long tmp; - ulong tmo; - - tmo = us_to_tick(usec); - tmp = get_ticks() + tmo; /* get current timestamp */ - - while (get_ticks() < tmp) /* loop till event */ - /*NOP*/; -} - -/* - * 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 CLK_32KHZ; -} |