Add GPL-2.0+ SPDX-License-Identifier to source files

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / omap-common / timer.c

diff --git a/arch/arm/cpu/armv7/omap-common/timer.c b/arch/arm/cpu/armv7/omap-common/timer.c
index 69e285ff1dd9b86e0a285f065c64562edf5cac00..7c9924dc39ce1076a43c6ae620f66c06123ac10f 100644 (file)
--- a/arch/arm/cpu/armv7/omap-common/timer.c
+++ b/arch/arm/cpu/armv7/omap-common/timer.c
@@ -13,42 +13,25 @@
  * (C) Copyright 2002
  * Gary Jennejohn, DENX Software Engineering, <garyj@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 <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
 
-static ulong timestamp;
-static ulong lastinc;
 static struct gptimer *timer_base = (struct gptimer *)CONFIG_SYS_TIMERBASE;
 
 /*
  * Nothing really to do with interrupts, just starts up a counter.
- * We run the counter with 13MHz, divided by 8, resulting in timer
- * frequency of 1.625MHz. With 32bit counter register, counter
- * overflows in ~44min
  */
 
-/* 13MHz / 8 = 1.625MHz */
-#define TIMER_CLOCK    (V_SCLK / (2 << CONFIG_SYS_PTV))
-#define TIMER_LOAD_VAL 0xffffffff
+#define TIMER_CLOCK            (V_SCLK / (2 << CONFIG_SYS_PTV))
+#define TIMER_OVERFLOW_VAL     0xffffffff
+#define TIMER_LOAD_VAL         0
 
 int timer_init(void)
 {
@@ -58,7 +41,10 @@ int timer_init(void)
        writel((CONFIG_SYS_PTV << 2) | TCLR_PRE | TCLR_AR | TCLR_ST,
                &timer_base->tclr);
 
-       reset_timer_masked();   /* init the timestamp and lastinc value */
+       /* reset time, capture current incrementer value time */
+       gd->arch.lastinc = readl(&timer_base->tcrr) /
+                                       (TIMER_CLOCK / CONFIG_SYS_HZ);
+       gd->arch.tbl = 0;       /* start "advancing" time stamp from 0 */
 
        return 0;
 }
@@ -66,62 +52,41 @@ int timer_init(void)
 /*
  * timer without interrupts
  */
-void reset_timer(void)
-{
-       reset_timer_masked();
-}
-
 ulong get_timer(ulong base)
 {
        return get_timer_masked() - base;
 }
 
-void set_timer(ulong t)
-{
-       timestamp = t;
-}
-
 /* delay x useconds */
 void __udelay(unsigned long usec)
 {
-#if defined(CONFIG_OMAP44XX)
-       /* TODO temporary hack until OMAP4 clock setup routines are present */
-       if (usec > 1000)
-               usec = usec/1000;
-#endif
        long tmo = usec * (TIMER_CLOCK / 1000) / 1000;
        unsigned long now, last = readl(&timer_base->tcrr);
 
        while (tmo > 0) {
                now = readl(&timer_base->tcrr);
                if (last > now) /* count up timer overflow */
-                       tmo -= TIMER_LOAD_VAL - last + now;
+                       tmo -= TIMER_OVERFLOW_VAL - last + now + 1;
                else
                        tmo -= now - last;
                last = now;
        }
 }
 
-void reset_timer_masked(void)
-{
-       /* reset time, capture current incrementer value time */
-       lastinc = readl(&timer_base->tcrr) / (TIMER_CLOCK / CONFIG_SYS_HZ);
-       timestamp = 0;          /* start "advancing" time stamp from 0 */
-}
-
 ulong get_timer_masked(void)
 {
        /* current tick value */
        ulong now = readl(&timer_base->tcrr) / (TIMER_CLOCK / CONFIG_SYS_HZ);
 
-       if (now >= lastinc)     /* normal mode (non roll) */
+       if (now >= gd->arch.lastinc) {  /* normal mode (non roll) */
                /* move stamp fordward with absoulte diff ticks */
-               timestamp += (now - lastinc);
-       else    /* we have rollover of incrementer */
-               timestamp += ((TIMER_LOAD_VAL / (TIMER_CLOCK / CONFIG_SYS_HZ))
-                               - lastinc) + now;
-       lastinc = now;
-       return timestamp;
+               gd->arch.tbl += (now - gd->arch.lastinc);
+       } else {        /* we have rollover of incrementer */
+               gd->arch.tbl += ((TIMER_LOAD_VAL / (TIMER_CLOCK /
+                               CONFIG_SYS_HZ)) - gd->arch.lastinc) + now;
+       }
+       gd->arch.lastinc = now;
+       return gd->arch.tbl;
 }
 
 /*