src/soc/rockchip/rk3288/timer.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2014 Rockchip Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/io.h>
  17 #include <delay.h>
  18 #include <soc/timer.h>
  19 #include <stdint.h>
  20 #include <timer.h>
  21
  22 static uint64_t timer_raw_value(void)
  23 {
  24         uint64_t value0;
  25         uint64_t value1;
  26
  27         value0 = (uint64_t)read32(&timer7_ptr->timer_curr_value0);
  28         value1 = (uint64_t)read32(&timer7_ptr->timer_curr_value1);
  29         value0 = value0 | value1<<32;
  30         return value0;
  31 }
  32
  33 void timer_monotonic_get(struct mono_time *mt)
  34 {
  35         mono_time_set_usecs(mt, timer_raw_value() / clocks_per_usec);
  36 }
  37
  38 void init_timer(void)
  39 {
  40         write32(&timer7_ptr->timer_load_count0, TIMER_LOAD_VAL);
  41         write32(&timer7_ptr->timer_load_count1, TIMER_LOAD_VAL);
  42         write32(&timer7_ptr->timer_ctrl_reg, 1);
  43 }