diff options
author | Caveh Jalali <caveh@chromium.org> | 2021-02-04 00:15:00 -0800 |
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committer | Commit Bot <commit-bot@chromium.org> | 2021-02-06 00:59:26 +0000 |
commit | 08aa55288e75eec80c66efff1a59c14a6048ac5d (patch) | |
tree | fa34ee5101829f3a8cea4c3d2617b40c3ca8ecb7 /power/alderlake_slg4bd44540.c | |
parent | 4eb7ace3ff728091862f400a26b569b2fb681b4c (diff) | |
download | chrome-ec-08aa55288e75eec80c66efff1a59c14a6048ac5d.tar.gz |
brya: Clone power sequencer from icelake
This clones the icelake power sequencer code as a baseline for brya's
custom power sequencer. This is solely intended to highlight the
customizations in following patches.
BRANCH=none
BUG=b:173575131
TEST=buildall passes
Change-Id: Ib9f0b986ab617002f987fed26e8aba1f9322a3e1
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2675308
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'power/alderlake_slg4bd44540.c')
-rw-r--r-- | power/alderlake_slg4bd44540.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/power/alderlake_slg4bd44540.c b/power/alderlake_slg4bd44540.c new file mode 100644 index 0000000000..f2e62d981d --- /dev/null +++ b/power/alderlake_slg4bd44540.c @@ -0,0 +1,344 @@ +/* Copyright 2018 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. + */ + +/* Icelake chipset power control module for Chrome EC */ + +#include "board_config.h" +#include "chipset.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "power.h" +#include "power/intel_x86.h" +#include "power_button.h" +#include "task.h" +#include "timer.h" + +/* Console output macros */ +#define CPRINTS(format, args...) cprints(CC_CHIPSET, format, ## args) + +#ifdef CONFIG_BRINGUP +#define GPIO_SET_LEVEL(signal, value) \ + gpio_set_level_verbose(CC_CHIPSET, signal, value) +#else +#define GPIO_SET_LEVEL(signal, value) \ + gpio_set_level(signal, value) +#endif + +/* The wait time is ~150 msec, allow for safety margin. */ +#define IN_PCH_SLP_SUS_WAIT_TIME_USEC (250 * MSEC) + +static int forcing_shutdown; /* Forced shutdown in progress? */ + +/* Power signals list. Must match order of enum power_signal. */ +const struct power_signal_info power_signal_list[] = { + [X86_SLP_S0_DEASSERTED] = { + .gpio = GPIO_PCH_SLP_S0_L, + .flags = POWER_SIGNAL_ACTIVE_HIGH | + POWER_SIGNAL_DISABLE_AT_BOOT, + .name = "SLP_S0_DEASSERTED", + }, + [X86_SLP_S3_DEASSERTED] = { + .gpio = SLP_S3_SIGNAL_L, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "SLP_S3_DEASSERTED", + }, + [X86_SLP_S4_DEASSERTED] = { + .gpio = SLP_S4_SIGNAL_L, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "SLP_S4_DEASSERTED", + }, + [X86_SLP_SUS_DEASSERTED] = { + .gpio = GPIO_SLP_SUS_L, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "SLP_SUS_DEASSERTED", + }, + [X86_RSMRST_L_PGOOD] = { + .gpio = GPIO_PG_EC_RSMRST_ODL, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "RSMRST_L_PGOOD", + }, + [X86_DSW_DPWROK] = { + .gpio = GPIO_PG_EC_DSW_PWROK, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "DSW_DPWROK", + }, + [X86_ALL_SYS_PGOOD] = { + .gpio = GPIO_PG_EC_ALL_SYS_PWRGD, + .flags = POWER_SIGNAL_ACTIVE_HIGH, + .name = "ALL_SYS_PWRGD", + }, +}; +BUILD_ASSERT(ARRAY_SIZE(power_signal_list) == POWER_SIGNAL_COUNT); + +__overridable int intel_x86_get_pg_ec_dsw_pwrok(void) +{ + return gpio_get_level(GPIO_PG_EC_DSW_PWROK); +} + +__overridable int intel_x86_get_pg_ec_all_sys_pwrgd(void) +{ + return gpio_get_level(GPIO_PG_EC_ALL_SYS_PWRGD); +} + +void chipset_force_shutdown(enum chipset_shutdown_reason reason) +{ + int timeout_ms = 50; + + CPRINTS("%s() %d", __func__, reason); + report_ap_reset(reason); + + /* Turn off RMSRST_L to meet tPCH12 */ + board_before_rsmrst(0); + GPIO_SET_LEVEL(GPIO_PCH_RSMRST_L, 0); + board_after_rsmrst(0); + + /* Turn off DSW_PWROK to meet tPCH14 */ + GPIO_SET_LEVEL(GPIO_PCH_DSW_PWROK, 0); + + /* Turn off DSW load switch. */ + GPIO_SET_LEVEL(GPIO_EN_PP3300_A, 0); + + /* + * For JSL, we need to wait 60ms before turning off PP5000_U to allow + * VCCIN_AUX time to discharge. + */ + if (IS_ENABLED(CONFIG_CHIPSET_JASPERLAKE)) + msleep(60); + + /* Turn off PP5000 rail */ + if (IS_ENABLED(CONFIG_POWER_PP5000_CONTROL)) + power_5v_enable(task_get_current(), 0); + else + GPIO_SET_LEVEL(GPIO_EN_PP5000, 0); + + /* + * TODO(b/111810925): Replace this wait with + * power_wait_signals_timeout() + */ + /* Now wait for DSW_PWROK and RSMRST_ODL to go away. */ + while (intel_x86_get_pg_ec_dsw_pwrok() && + gpio_get_level(GPIO_PG_EC_RSMRST_ODL) && (timeout_ms > 0)) { + msleep(1); + timeout_ms--; + }; + + if (!timeout_ms) + CPRINTS("DSW_PWROK or RSMRST_ODL didn't go low! Assuming G3."); +} + +void chipset_handle_espi_reset_assert(void) +{ + /* + * If eSPI_Reset# pin is asserted without SLP_SUS# being asserted, then + * it means that there is an unexpected power loss (global reset + * event). In this case, check if shutdown was being forced by pressing + * power button. If yes, release power button. + */ + if ((power_get_signals() & IN_PCH_SLP_SUS_DEASSERTED) && + forcing_shutdown) { + power_button_pch_release(); + forcing_shutdown = 0; + } +} + +enum power_state chipset_force_g3(void) +{ + chipset_force_shutdown(CHIPSET_SHUTDOWN_G3); + + return POWER_G3; +} + +static void enable_pp5000_rail(void) +{ + if (IS_ENABLED(CONFIG_POWER_PP5000_CONTROL)) + power_5v_enable(task_get_current(), 1); + else + GPIO_SET_LEVEL(GPIO_EN_PP5000, 1); + +} + +__overridable void intel_x86_dsw_pwrok_pass_thru(void) +{ + int dswpwrok_in = intel_x86_get_pg_ec_dsw_pwrok(); + + /* Pass-through DSW_PWROK to ICL. */ + if (dswpwrok_in != gpio_get_level(GPIO_PCH_DSW_PWROK)) { + if (IS_ENABLED(CONFIG_CHIPSET_SLP_S3_L_OVERRIDE) + && dswpwrok_in) { + /* + * Once DSW_PWROK is high, reconfigure SLP_S3_L back to + * an input after a short delay. + */ + msleep(1); + CPRINTS("Release SLP_S3_L"); + gpio_reset(SLP_S3_SIGNAL_L); + power_signal_enable_interrupt(SLP_S3_SIGNAL_L); + } + + CPRINTS("Pass thru GPIO_DSW_PWROK: %d", dswpwrok_in); + /* + * A minimum 10 msec delay is required between PP3300_A being + * stable and the DSW_PWROK signal being passed to the PCH. + */ + msleep(10); + GPIO_SET_LEVEL(GPIO_PCH_DSW_PWROK, dswpwrok_in); + } +} + +#ifndef CONFIG_PWRGD_PASS_THROUGH_CUSTOM +/* + * Return 0 if PWROK signal is deasserted, non-zero if asserted + */ +static int pwrok_signal_get(const struct intel_x86_pwrok_signal *signal) +{ + int level = gpio_get_level(signal->gpio); + + if (signal->active_low) + level = !level; + + return level; +} + +/* + * Set the PWROK signal state + * + * ¶m level 0 deasserts the signal, other values assert the signal + */ +static void pwrok_signal_set(const struct intel_x86_pwrok_signal *signal, + int level) +{ + GPIO_SET_LEVEL(signal->gpio, signal->active_low ? !level : level); +} + +/* + * Pass through the state of the ALL_SYS_PWRGD input to all the PWROK outputs + * defined by the board. + */ +static void all_sys_pwrgd_pass_thru(void) +{ + int all_sys_pwrgd_in = intel_x86_get_pg_ec_all_sys_pwrgd(); + const struct intel_x86_pwrok_signal *pwrok_signal; + int signal_count; + int i; + + if (all_sys_pwrgd_in) { + pwrok_signal = pwrok_signal_assert_list; + signal_count = pwrok_signal_assert_count; + } else { + pwrok_signal = pwrok_signal_deassert_list; + signal_count = pwrok_signal_deassert_count; + } + + /* + * Loop through all PWROK signals defined by the board and set + * to match the current ALL_SYS_PWRGD input. + */ + for (i = 0; i < signal_count; i++, pwrok_signal++) { + if ((!all_sys_pwrgd_in && !pwrok_signal_get(pwrok_signal)) + || (all_sys_pwrgd_in && pwrok_signal_get(pwrok_signal))) + continue; + + if (pwrok_signal->delay_ms > 0) + msleep(pwrok_signal->delay_ms); + + pwrok_signal_set(pwrok_signal, all_sys_pwrgd_in); + } +} +#endif /* CONFIG_PWRGD_PASS_THROUGH_CUSTOM */ + +enum power_state power_handle_state(enum power_state state) +{ +#ifdef CONFIG_CHIPSET_JASPERLAKE + int timeout_ms = 10; +#endif /* CONFIG_CHIPSET_JASPERLAKE */ + + intel_x86_dsw_pwrok_pass_thru(); + + all_sys_pwrgd_pass_thru(); + + common_intel_x86_handle_rsmrst(state); + + switch (state) { + + case POWER_G3S5: + if (IS_ENABLED(CONFIG_CHIPSET_SLP_S3_L_OVERRIDE)) { + /* + * Prevent glitches on the SLP_S3_L and PCH_PWROK + * signals while when the PP3300_A rail is turned on. + * Drive SLP_S3_L from the EC until DSW_PWROK is high. + */ + CPRINTS("Drive SLP_S3_L low during PP3300_A rampup"); + power_signal_disable_interrupt(SLP_S3_SIGNAL_L); + gpio_set_flags(SLP_S3_SIGNAL_L, GPIO_ODR_LOW); + } + + /* Default behavior - turn on PP5000 rail first */ + if (!IS_ENABLED(CONFIG_CHIPSET_PP3300_RAIL_FIRST)) + enable_pp5000_rail(); + + /* + * TODO(b/111121615): Should modify this to wait until the + * common power state machine indicates that it's ok to try an + * boot the AP prior to turning on the 3300_A rail. This could + * be done using chipset_pre_init_callback() + */ + /* Turn on the PP3300_DSW rail. */ + GPIO_SET_LEVEL(GPIO_EN_PP3300_A, 1); + if (power_wait_signals(IN_PGOOD_ALL_CORE)) + break; + + /* Pass thru DSW_PWROK again since we changed it. */ + intel_x86_dsw_pwrok_pass_thru(); + + /* Turn on PP5000 after PP3300 and DSW PWROK when enabled */ + if (IS_ENABLED(CONFIG_CHIPSET_PP3300_RAIL_FIRST)) + enable_pp5000_rail(); + + /* + * Now wait for SLP_SUS_L to go high based on tPCH32. If this + * signal doesn't go high within 250 msec then go back to G3. + */ + if (power_wait_signals_timeout(IN_PCH_SLP_SUS_DEASSERTED, + IN_PCH_SLP_SUS_WAIT_TIME_USEC) != EC_SUCCESS) { + CPRINTS("SLP_SUS_L didn't go high! Going back to G3."); + return POWER_S5G3; + } + break; + + case POWER_S5: + if (forcing_shutdown) { + power_button_pch_release(); + forcing_shutdown = 0; + } + /* If SLP_SUS_L is asserted, we're no longer in S5. */ + if (!power_has_signals(IN_PCH_SLP_SUS_DEASSERTED)) + return POWER_S5G3; + break; + +#ifdef CONFIG_CHIPSET_JASPERLAKE + case POWER_S3S0: + GPIO_SET_LEVEL(GPIO_EN_VCCIO_EXT, 1); + /* Now wait for ALL_SYS_PWRGD. */ + while (!intel_x86_get_pg_ec_all_sys_pwrgd() && + (timeout_ms > 0)) { + msleep(1); + timeout_ms--; + }; + if (!timeout_ms) + CPRINTS("ALL_SYS_PWRGD not received."); + break; + + case POWER_S0S3: + GPIO_SET_LEVEL(GPIO_EN_VCCIO_EXT, 0); + break; +#endif /* CONFIG_CHIPSET_JASPERLAKE */ + + default: + break; + } + + return common_intel_x86_power_handle_state(state); +} |