diff options
Diffstat (limited to 'payloads/libpayload/drivers/timer')
-rw-r--r-- | payloads/libpayload/drivers/timer/rktimer.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/timer/rktimer.c b/payloads/libpayload/drivers/timer/rktimer.c new file mode 100644 index 0000000000..040ac32fa2 --- /dev/null +++ b/payloads/libpayload/drivers/timer/rktimer.c @@ -0,0 +1,46 @@ + +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Rockchip Electronics + * + * 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 <arch/io.h> +#include <libpayload.h> +#include <stdint.h> +struct rk_timer { + u32 timer_load_count0; + u32 timer_load_count1; + u32 timer_curr_value0; + u32 timer_curr_value1; + u32 timer_ctrl_reg; + u32 timer_int_status; +}; + +uint64_t timer_hz(void) +{ + return 24000000; +} + +uint64_t timer_raw_value(void) +{ + uint64_t upper; + uint64_t lower; + struct rk_timer *rk_timer; + rk_timer = (struct rk_timer *) CONFIG_LP_TIMER_RK_ADDRESS; + lower = (uint64_t) rk_timer->timer_curr_value0; + upper = (uint64_t) rk_timer->timer_curr_value1; + return (upper << 32) | lower; +} |