diff options
Diffstat (limited to 'chip/npcx/lct.c')
| -rw-r--r-- | chip/npcx/lct.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/chip/npcx/lct.c b/chip/npcx/lct.c deleted file mode 100644 index e23fa3bf6a..0000000000 --- a/chip/npcx/lct.c +++ /dev/null @@ -1,176 +0,0 @@ -/* Copyright 2020 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* LCT (Long Countdown Timer) module for Chrome EC */ -#include "lct_chip.h" -#include "console.h" -#include "hooks.h" -#include "registers.h" -#include "rtc.h" -#include "task.h" -#include "timer.h" -#include "util.h" - -#define LCT_CLK_ENABLE_DELAY_USEC 150 - -#define CPRINTF(format, args...) cprintf(CC_CLOCK, format, ## args) -#define CPRINTS(format, args...) cprints(CC_CLOCK, format, ## args) - -void npcx_lct_sel_power_src(enum NPCX_LCT_PWR_SRC pwr_src) -{ - if (IS_BIT_SET(NPCX_LCTCONT, NPCX_LCTCONT_EN)) { - CPRINTS("Don't set power source when LCT is enabled"); - return; - } - - if (pwr_src == NPCX_LCT_PWR_SRC_VSBY) - SET_BIT(NPCX_LCTCONT, NPCX_LCTCONT_VSBY_PWR); - else - CLEAR_BIT(NPCX_LCTCONT, NPCX_LCTCONT_VSBY_PWR); -} - -void npcx_lct_enable_clk(uint8_t enable) -{ - if (IS_BIT_SET(NPCX_LCTCONT, NPCX_LCTCONT_EN)) { - CPRINTS("Don't set/unset clock when LCT is enabled"); - return; - } - - if (enable) { - SET_BIT(NPCX_LCTCONT, NPCX_LCTCONT_CLK_EN); - /* - * This bit must be set to 1 at least tLCTCKEN (150 us) - * before the LCT is enabled. - */ - udelay(LCT_CLK_ENABLE_DELAY_USEC); - } else { - CLEAR_BIT(NPCX_LCTCONT, NPCX_LCTCONT_CLK_EN); - } -} - -void npcx_lct_enable(uint8_t enable) -{ - enable = !!enable; - SET_FIELD(NPCX_LCTCONT, NPCX_LCTCONT_EN_FIELD, enable); - /* Wait until the bit value equals to what is set */ - while (IS_BIT_SET(NPCX_LCTCONT, NPCX_LCTCONT_EN) != enable) - ; -} - -void npcx_lct_config(int seconds, int psl_ena, int int_ena) -{ - if (IS_BIT_SET(NPCX_LCTCONT, NPCX_LCTCONT_EN)) { - CPRINTS("Don't config LCT when LCT is enabled"); - return; - } - - /* LCT can count max to (16 weeks - 1 second) */ - if (seconds > NPCX_LCT_MAX) { - CPRINTS("LCT time is out of range"); - return; - } - - /* Clear pending LCT event first */ - NPCX_LCTSTAT = BIT(NPCX_LCTSTAT_EVST); - - NPCX_LCTWEEK = seconds / SECS_PER_WEEK; - seconds %= SECS_PER_WEEK; - NPCX_LCTDAY = seconds / SECS_PER_DAY; - seconds %= SECS_PER_DAY; - NPCX_LCTHOUR = seconds / SECS_PER_HOUR; - seconds %= SECS_PER_HOUR; - NPCX_LCTMINUTE = seconds / SECS_PER_MINUTE; - NPCX_LCTSECOND = seconds % SECS_PER_MINUTE; - - if (psl_ena) { - if (IS_BIT_SET(NPCX_LCTCONT, NPCX_LCTCONT_VSBY_PWR)) - SET_BIT(NPCX_LCTCONT, NPCX_LCTCONT_PSL_EN); - else - CPRINTS("LCT must source VSBY to support PSL wakeup"); - } - - if (int_ena) - SET_BIT(NPCX_LCTCONT, NPCX_LCTCONT_EVEN); - -} - -uint32_t npcx_lct_get_time(void) -{ - uint32_t second; - uint8_t week, day, hour, minute; - - do { - week = NPCX_LCTWEEK; - day = NPCX_LCTDAY; - hour = NPCX_LCTHOUR; - minute = NPCX_LCTMINUTE; - second = NPCX_LCTSECOND; - } while (week != NPCX_LCTWEEK || - day != NPCX_LCTDAY || - hour != NPCX_LCTHOUR || - minute != NPCX_LCTMINUTE || - second != NPCX_LCTSECOND); - - second += minute * SECS_PER_MINUTE + - hour * SECS_PER_HOUR + - day * SECS_PER_DAY + - week * SECS_PER_WEEK; - - return second; -} - -void npcx_lct_clear_event(void) -{ - NPCX_LCTSTAT = BIT(NPCX_LCTSTAT_EVST); -} - -int npcx_lct_is_event_set(void) -{ - return IS_BIT_SET(NPCX_LCTSTAT, NPCX_LCTSTAT_EVST); -} - -static void npcx_lct_init(void) -{ - /* Disable LCT */ - npcx_lct_enable(0); - /* Clear control and status registers */ - NPCX_LCTCONT = 0x0; - npcx_lct_clear_event(); - /* Clear all timer registers */ - NPCX_LCTSECOND = 0x0; - NPCX_LCTMINUTE = 0x0; - NPCX_LCTHOUR = 0x0; - NPCX_LCTDAY = 0x0; - NPCX_LCTWEEK = 0x0; -} -DECLARE_HOOK(HOOK_INIT, npcx_lct_init, HOOK_PRIO_DEFAULT); - -#ifdef CONFIG_CMD_RTC_ALARM -static int command_lctalarm(int argc, char **argv) -{ - char *e; - int seconds; - - seconds = strtoi(argv[1], &e, 0); - if (*e) - return EC_ERROR_PARAM2; - - npcx_lct_enable(0); - npcx_lct_sel_power_src(NPCX_LCT_PWR_SRC_VSBY); - npcx_lct_enable_clk(1); - /* Enable LCT event interrupt and MIWU */ - npcx_lct_config(seconds, 0, 1); - task_disable_irq(NPCX_IRQ_LCT_WKINTF_2); - /* Enable wake-up input sources & clear pending bit */ - NPCX_WKPCL(MIWU_TABLE_2, LCT_WUI_GROUP) |= LCT_WUI_MASK; - NPCX_WKINEN(MIWU_TABLE_2, LCT_WUI_GROUP) |= LCT_WUI_MASK; - NPCX_WKEN(MIWU_TABLE_2, LCT_WUI_GROUP) |= LCT_WUI_MASK; - task_enable_irq(NPCX_IRQ_LCT_WKINTF_2); - npcx_lct_enable(1); - - return 0; -} -DECLARE_CONSOLE_COMMAND(lctalarm, command_lctalarm, "", ""); -#endif |