| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 Rockchip Inc. |
| * |
| * 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; version 2 of the License. |
| * |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <console/console.h> |
| #include <timer.h> |
| #include <delay.h> |
| #include <arch/io.h> |
| #include "timer.h" |
| |
| void init_timer(void) |
| { |
| } |
| |
| void rk3288_init_timer(void) |
| { |
| write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count0); |
| write32(TIMER_LOAD_VAL, &timer7_ptr->timer_load_count1); |
| write32(1, &timer7_ptr->timer_ctrl_reg); |
| } |
| |
| /* delay x useconds */ |
| void udelay(unsigned usec) |
| { |
| struct mono_time current, end; |
| |
| timer_monotonic_get(¤t); |
| end = current; |
| mono_time_add_usecs(&end, usec); |
| |
| if (mono_time_after(¤t, &end)) { |
| printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n", |
| usec); |
| /* There's not much we can do if usec is too big. Use a long, |
| * paranoid delay value and hope for the best... */ |
| end = current; |
| mono_time_add_usecs(&end, USECS_PER_SEC); |
| } |
| |
| while (mono_time_before(¤t, &end)) |
| timer_monotonic_get(¤t); |
| } |
| |