From 4c8d4872a56ea99feb3397619927db360b2f6339 Mon Sep 17 00:00:00 2001 From: Tristan Shieh Date: Wed, 6 Jun 2018 13:35:12 +0800 Subject: mediatek: Refactor to sharing code among similar SOCs This patch refactor cbmem and timer code which will be reused among similar SOCs. BUG=b:80501386 BRANCH=none TEST=the refactored code works fine on the new platform (with the rest of the patches applied) and Elm platform Change-Id: I397ebdc0c97c7616bd547022d2ce2a8f08f3c232 Signed-off-by: Tristan Shieh Reviewed-on: https://review.coreboot.org/26881 Reviewed-by: Patrick Georgi Reviewed-by: Hung-Te Lin Tested-by: build bot (Jenkins) --- src/soc/mediatek/mt8173/common_timer.c | 47 ++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 src/soc/mediatek/mt8173/common_timer.c (limited to 'src/soc/mediatek/mt8173/common_timer.c') diff --git a/src/soc/mediatek/mt8173/common_timer.c b/src/soc/mediatek/mt8173/common_timer.c new file mode 100644 index 0000000000..6e4315c7cf --- /dev/null +++ b/src/soc/mediatek/mt8173/common_timer.c @@ -0,0 +1,47 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 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. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +static struct mtk_gpt_regs *const mtk_gpt = (void *)GPT_BASE; + +__weak void timer_prepare(void) { /* do nothing */ } + +void timer_monotonic_get(struct mono_time *mt) +{ + mono_time_set_usecs(mt, read32(&mtk_gpt->gpt4_cnt) / GPT4_MHZ); +} + +void init_timer(void) +{ + timer_prepare(); + + /* Disable GPT4 and clear the counter */ + clrbits_le32(&mtk_gpt->gpt4_con, GPT_CON_EN); + setbits_le32(&mtk_gpt->gpt4_con, GPT_CON_CLR); + + /* Set clock source to system clock and set clock divider to 1 */ + write32(&mtk_gpt->gpt4_clk, GPT_SYS_CLK | GPT_CLK_DIV1); + /* Set operation mode to FREERUN mode and enable GTP4 */ + write32(&mtk_gpt->gpt4_con, GPT_CON_EN | GPT_MODE_FREERUN); +} -- cgit v1.2.3