src/soc/rockchip/rk3399/timer.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <device/mmio.h>
  16 #include <delay.h>
  17 #include <soc/timer.h>
  18 #include <stdint.h>
  19 #include <timer.h>
  20
  21 static uint64_t timer_raw_value(void)
  22 {
  23         uint64_t value0;
  24         uint64_t value1;
  25
  26         value0 = (uint64_t)read32(&timer0_ptr->timer_cur_value0);
  27         value1 = (uint64_t)read32(&timer0_ptr->timer_cur_value1);
  28
  29         return value0 | value1<<32;
  30 }
  31
  32 void timer_monotonic_get(struct mono_time *mt)
  33 {
  34         mono_time_set_usecs(mt, timer_raw_value() / clocks_per_usec);
  35 }
  36
  37 void init_timer(void)
  38 {
  39         write32(&timer0_ptr->timer_load_count0, TIMER_LOAD_VAL);
  40         write32(&timer0_ptr->timer_load_count1, TIMER_LOAD_VAL);
  41         write32(&timer0_ptr->timer_load_count2, 0);
  42         write32(&timer0_ptr->timer_load_count3, 0);
  43         write32(&timer0_ptr->timer_ctrl_reg, 1);
  44 }