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libpayload: add mediatek timer driver

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Change-Id: Ifb19cf97d4db6c7394521e549968a0cfb6ed1c75
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 0137652ca07e290bb3cb1cc82a00b44ac7bcc7bf
Original-Change-Id: Ica649927d3533c847b24e520e8fe73d75fb9e786
Original-Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/257375
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/10170
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Yidi Lin 2015-02-09 16:34:44 +08:00 committed by Patrick Georgi
parent 589e63ee7c
commit 7267ccbae8
3 changed files with 52 additions and 0 deletions
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17
payloads/libpayload/Config.in
View file

@ -405,6 +405,9 @@ config TIMER_CYGNUS
config TIMER_IMG_PISTACHIO
bool "Timer for IMG Pistachio"
config TIMER_MTK
bool "Timer for MediaTek MT8173"
endchoice
config TIMER_MCT_HZ
@ -447,6 +450,20 @@ config IPROC_PERIPH_GLB_TIM_REG_BASE
depends on TIMER_CYGNUS
default 0x19020200
config TIMER_MTK_HZ
int "MediaTek GPT frequency"
depends on TIMER_MTK
default 13000000
help
Clock frequency of MediaTek General Purpose Timer.
config TIMER_MTK_ADDRESS
hex "MTK GPT register address"
depends on TIMER_MTK
default 0x10008048
help
Address of GPT4's counter register to read the FREERUN-mode timer value.
config USB
bool "USB Support"
default n

1
payloads/libpayload/drivers/Makefile.inc
View file

@ -46,6 +46,7 @@ libc-$(CONFIG_LP_NVRAM) += nvram.c
libc-$(CONFIG_LP_NVRAM) += options.c
# Timer drivers
libc-$(CONFIG_LP_TIMER_MTK) += timer/mtk_timer.c
libc-$(CONFIG_LP_TIMER_MCT) += timer/mct.c
libc-$(CONFIG_LP_TIMER_RDTSC) += timer/rdtsc.c
libc-$(CONFIG_LP_TIMER_TEGRA_1US) += timer/tegra_1us.c

34
payloads/libpayload/drivers/timer/mtk_timer.c Normal file
View file

@ -0,0 +1,34 @@
/*
* This file is part of the coreboot project.
*
* Copyright 2014 MediaTek 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 <arch/io.h>
#include <libpayload.h>
#include <libpayload-config.h>
#include <stdint.h>
static uint32_t *const mtk_tmrus = (void*)CONFIG_LP_TIMER_MTK_ADDRESS;
uint64_t timer_hz(void)
{
return CONFIG_LP_TIMER_MTK_HZ;
}
uint64_t timer_raw_value(void)
{
return (uint64_t)readl(mtk_tmrus);
}