From e63aade5bd3553bd1a6fe7fa391edfb8b36c283e Mon Sep 17 00:00:00 2001 From: Bill Richardson Date: Mon, 29 Apr 2013 17:04:46 -0700 Subject: Split x86_power.c into Ivybridge and Haswell variants The voltage rails, inputs, and sequencing is completely different. Easiest to just handle it separately for each chipset. BUG=chrome-os-partner:18825 BRANCH=slippy TEST=manual Built Link, still works. Change-Id: Ibf26ef47cdf2284b7bfb3a2e5ccfb6841aba5ac6 Signed-off-by: Bill Richardson Reviewed-on: https://gerrit.chromium.org/gerrit/49559 Reviewed-by: Randall Spangler --- board/link/board.h | 2 +- board/slippy/board.h | 2 +- common/build.mk | 3 +- common/x86_power.c | 769 ------------------------------------------- common/x86_power_haswell.c | 768 ++++++++++++++++++++++++++++++++++++++++++ common/x86_power_ivybridge.c | 768 ++++++++++++++++++++++++++++++++++++++++++ include/x86_power.h | 4 - 7 files changed, 1540 insertions(+), 776 deletions(-) delete mode 100644 common/x86_power.c create mode 100644 common/x86_power_haswell.c create mode 100644 common/x86_power_ivybridge.c diff --git a/board/link/board.h b/board/link/board.h index 2902b7c011..0e68065c62 100644 --- a/board/link/board.h +++ b/board/link/board.h @@ -20,7 +20,7 @@ #define CONFIG_CHARGER #define CONFIG_CHARGER_BQ24725 #ifdef HAS_TASK_CHIPSET -#define CONFIG_CHIPSET_X86 +#define CONFIG_CHIPSET_X86_IVYBRIDGE #endif #define CONFIG_CUSTOM_KEYSCAN #define CONFIG_EXTPOWER_GPIO diff --git a/board/slippy/board.h b/board/slippy/board.h index 4b51c74c8e..9246e8fd31 100644 --- a/board/slippy/board.h +++ b/board/slippy/board.h @@ -20,7 +20,7 @@ #define CONFIG_CHARGER #define CONFIG_CHARGER_BQ24725 #ifdef HAS_TASK_CHIPSET -#define CONFIG_CHIPSET_X86 +#define CONFIG_CHIPSET_X86_HASWELL #endif #define CONFIG_CUSTOM_KEYSCAN #define CONFIG_EXTPOWER_GPIO diff --git a/common/build.mk b/common/build.mk index 8f0b819fd8..226b47f1bc 100644 --- a/common/build.mk +++ b/common/build.mk @@ -14,7 +14,8 @@ common-$(CONFIG_BATTERY_LINK)+=battery_link.o charge_state.o battery_precharge.o common-$(CONFIG_CHARGER_BQ24725)+=charger_bq24725.o common-$(CONFIG_CHARGER_TPS65090)+=pmu_tps65090_charger.o common-$(CONFIG_CHIPSET_GAIA)+=gaia_power.o -common-$(CONFIG_CHIPSET_X86)+=x86_power.o +common-$(CONFIG_CHIPSET_X86_IVYBRIDGE)+=x86_power_ivybridge.o +common-$(CONFIG_CHIPSET_X86_HASWELL)+=x86_power_haswell.o common-$(CONFIG_PMU_TPS65090)+=pmu_tps65090.o common-$(CONFIG_EOPTION)+=eoption.o common-$(CONFIG_EXTPOWER_GPIO)+=extpower_gpio.o diff --git a/common/x86_power.c b/common/x86_power.c deleted file mode 100644 index d704d32efe..0000000000 --- a/common/x86_power.c +++ /dev/null @@ -1,769 +0,0 @@ -/* Copyright (c) 2013 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. - */ - -/* X86 chipset power control module for Chrome EC */ - -#include "chipset.h" -#include "common.h" -#include "console.h" -#include "extpower.h" -#include "gpio.h" -#include "hooks.h" -#include "host_command.h" -#include "lid_switch.h" -#include "switch.h" -#include "system.h" -#include "task.h" -#include "timer.h" -#include "util.h" -#include "x86_power.h" - -/* Console output macros */ -#define CPUTS(outstr) cputs(CC_CHIPSET, outstr) -#define CPRINTF(format, args...) cprintf(CC_CHIPSET, format, ## args) - -/* - * Default timeout in us; if we've been waiting this long for an input - * transition, just jump to the next state. - */ -#define DEFAULT_TIMEOUT SECOND - -/* Timeout for dropping back from S5 to G3 */ -#define S5_INACTIVITY_TIMEOUT (10 * SECOND) - -enum x86_state { - X86_G3 = 0, /* - * System is off (not technically all the - * way into G3, which means totally - * unpowered...) - */ - X86_S5, /* System is soft-off */ - X86_S3, /* Suspend; RAM on, processor is asleep */ - X86_S0, /* System is on */ - - /* Transitions */ - X86_G3S5, /* G3 -> S5 (at system init time) */ - X86_S5S3, /* S5 -> S3 */ - X86_S3S0, /* S3 -> S0 */ - X86_S0S3, /* S0 -> S3 */ - X86_S3S5, /* S3 -> S5 */ - X86_S5G3, /* S5 -> G3 */ -}; - -static const char * const state_names[] = { - "G3", - "S5", - "S3", - "S0", - "G3->S5", - "S5->S3", - "S3->S0", - "S0->S3", - "S3->S5", - "S5->G3", -}; - -/* Input state flags */ -#define IN_PGOOD_5VALW 0x0001 -#define IN_PGOOD_1_5V_DDR 0x0002 -#define IN_PGOOD_1_5V_PCH 0x0004 -#define IN_PGOOD_1_8VS 0x0008 -#define IN_PGOOD_VCCP 0x0010 -#define IN_PGOOD_VCCSA 0x0020 -#define IN_PGOOD_CPU_CORE 0x0040 -#define IN_PGOOD_VGFX_CORE 0x0080 -#define IN_PCH_SLP_S3n_DEASSERTED 0x0100 -#define IN_PCH_SLP_S4n_DEASSERTED 0x0200 -#define IN_PCH_SLP_S5n_DEASSERTED 0x0400 -#define IN_PCH_SLP_An_DEASSERTED 0x0800 -#define IN_PCH_SLP_SUSn_DEASSERTED 0x1000 -#define IN_PCH_SLP_MEn_DEASSERTED 0x2000 -#define IN_PCH_SUSWARNn_DEASSERTED 0x4000 -/* All always-on supplies */ -#define IN_PGOOD_ALWAYS_ON (IN_PGOOD_5VALW) -/* All non-core power rails */ -#define IN_PGOOD_ALL_NONCORE (IN_PGOOD_1_5V_DDR | IN_PGOOD_1_5V_PCH | \ - IN_PGOOD_1_8VS | IN_PGOOD_VCCP | IN_PGOOD_VCCSA) -/* All core power rails */ -#define IN_PGOOD_ALL_CORE (IN_PGOOD_CPU_CORE | IN_PGOOD_VGFX_CORE) -/* Rails required for S3 */ -#define IN_PGOOD_S3 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_1_5V_DDR) -/* Rails required for S0 */ -#define IN_PGOOD_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE) - -/* All PM_SLP signals from PCH deasserted */ -#define IN_ALL_PM_SLP_DEASSERTED (IN_PCH_SLP_S3n_DEASSERTED | \ - IN_PCH_SLP_S4n_DEASSERTED | \ - IN_PCH_SLP_S5n_DEASSERTED | \ - IN_PCH_SLP_An_DEASSERTED) -/* All inputs in the right state for S0 */ -#define IN_ALL_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE | \ - IN_PGOOD_CPU_CORE | IN_ALL_PM_SLP_DEASSERTED) - -static enum x86_state state = X86_G3; /* Current state */ -static uint32_t in_signals; /* Current input signal states (IN_PGOOD_*) */ -static uint32_t in_want; /* Input signal state we're waiting for */ -static uint32_t in_debug; /* Signal values which print debug output */ -static int want_g3_exit; /* Should we exit the G3 state? */ -static int throttle_cpu; /* Throttle CPU? */ - -/* When did we enter G3? */ -static uint64_t last_shutdown_time; -/* Delay before go into hibernation in seconds*/ -static uint32_t hibernate_delay = 3600; /* 1 Hour */ - -/** - * Update input signal state. - */ -static void update_in_signals(void) -{ - uint32_t inew = 0; - int v; - - if (gpio_get_level(GPIO_PGOOD_5VALW)) - inew |= IN_PGOOD_5VALW; - - if (gpio_get_level(GPIO_PGOOD_1_5V_DDR)) - inew |= IN_PGOOD_1_5V_DDR; - if (gpio_get_level(GPIO_PGOOD_1_5V_PCH)) - inew |= IN_PGOOD_1_5V_PCH; - if (gpio_get_level(GPIO_PGOOD_1_8VS)) - inew |= IN_PGOOD_1_8VS; - if (gpio_get_level(GPIO_PGOOD_VCCP)) - inew |= IN_PGOOD_VCCP; - if (gpio_get_level(GPIO_PGOOD_VCCSA)) - inew |= IN_PGOOD_VCCSA; - - if (gpio_get_level(GPIO_PGOOD_CPU_CORE)) - inew |= IN_PGOOD_CPU_CORE; - if (gpio_get_level(GPIO_PGOOD_VGFX_CORE)) - inew |= IN_PGOOD_VGFX_CORE; - - if (gpio_get_level(GPIO_PCH_SLP_A_L)) - inew |= IN_PCH_SLP_An_DEASSERTED; - if (gpio_get_level(GPIO_PCH_SLP_S3_L)) - inew |= IN_PCH_SLP_S3n_DEASSERTED; - if (gpio_get_level(GPIO_PCH_SLP_S4_L)) - inew |= IN_PCH_SLP_S4n_DEASSERTED; - if (gpio_get_level(GPIO_PCH_SLP_S5_L)) - inew |= IN_PCH_SLP_S5n_DEASSERTED; - - if (gpio_get_level(GPIO_PCH_SLP_SUS_L)) - inew |= IN_PCH_SLP_SUSn_DEASSERTED; - if (gpio_get_level(GPIO_PCH_SLP_ME_CSW_DEV_L)) - inew |= IN_PCH_SLP_MEn_DEASSERTED; - - v = gpio_get_level(GPIO_PCH_SUSWARN_L); - if (v) - inew |= IN_PCH_SUSWARNn_DEASSERTED; - /* Copy SUSWARN# signal from PCH to SUSACK# */ - gpio_set_level(GPIO_PCH_SUSACK_L, v); - - if ((in_signals & in_debug) != (inew & in_debug)) - CPRINTF("[%T x86 in 0x%04x]\n", inew); - - in_signals = inew; -} - -/** - * Check for required inputs - * - * @param want Input flags which must be present (IN_*) - * - * @return Non-zero if all present; zero if a required signal is missing. - */ -static int have_all_in_signals(uint32_t want) -{ - if ((in_signals & want) == want) - return 1; - - CPRINTF("[%T x86 power lost input; wanted 0x%04x, got 0x%04x]\n", - want, in_signals & want); - - return 0; -} - -/** - * Wait for inputs to be present - * - * @param want Input flags which must be present (IN_*) - * - * @return EC_SUCCESS when all inputs are present, or ERROR_TIMEOUT if timeout - * before reaching the desired state. - */ -static int wait_in_signals(uint32_t want) -{ - in_want = want; - - while ((in_signals & in_want) != in_want) { - if (task_wait_event(DEFAULT_TIMEOUT) == TASK_EVENT_TIMER) { - update_in_signals(); - CPRINTF("[%T x86 power timeout on input; " - "wanted 0x%04x, got 0x%04x]\n", - in_want, in_signals & in_want); - return EC_ERROR_TIMEOUT; - } - /* - * TODO: should really shrink the remaining timeout if we woke - * up but didn't have all the signals we wanted. Also need to - * handle aborts if we're no longer in the same state we were - * when we started waiting. - */ - } - return EC_SUCCESS; -} - -/*****************************************************************************/ -/* Chipset interface */ - -void chipset_force_shutdown(void) -{ - CPRINTF("[%T chipset force shutdown]\n"); - - /* - * Force x86 off. This condition will reset once the state machine - * transitions to G3. - */ - gpio_set_level(GPIO_PCH_DPWROK, 0); - gpio_set_level(GPIO_PCH_RSMRST_L, 0); -} - -void chipset_reset(int cold_reset) -{ - if (cold_reset) { - /* - * Drop and restore PWROK. This causes the PCH to reboot, - * regardless of its after-G3 setting. This type of reboot - * causes the PCH to assert PLTRST#, SLP_S3#, and SLP_S5#, so - * we actually drop power to the rest of the system (hence, a - * "cold" reboot). - */ - - /* Ignore if PWROK is already low */ - if (gpio_get_level(GPIO_PCH_PWROK) == 0) - return; - - /* PWROK must deassert for at least 3 RTC clocks = 91 us */ - gpio_set_level(GPIO_PCH_PWROK, 0); - udelay(100); - gpio_set_level(GPIO_PCH_PWROK, 1); - - } else { - /* - * Send a RCIN# pulse to the PCH. This just causes it to - * assert INIT# to the CPU without dropping power or asserting - * PLTRST# to reset the rest of the system. - */ - - /* Pulse must be at least 16 PCI clocks long = 500 ns */ - gpio_set_level(GPIO_PCH_RCIN_L, 0); - udelay(10); - gpio_set_level(GPIO_PCH_RCIN_L, 1); - } -} - -int chipset_in_state(int state_mask) -{ - int need_mask = 0; - - /* - * TODO: what to do about state transitions? If the caller wants - * HARD_OFF|SOFT_OFF and we're in G3S5, we could still return - * non-zero. - */ - switch (state) { - case X86_G3: - need_mask = CHIPSET_STATE_HARD_OFF; - break; - case X86_G3S5: - case X86_S5G3: - /* - * In between hard and soft off states. Match only if caller - * will accept both. - */ - need_mask = CHIPSET_STATE_HARD_OFF | CHIPSET_STATE_SOFT_OFF; - break; - case X86_S5: - need_mask = CHIPSET_STATE_SOFT_OFF; - break; - case X86_S5S3: - case X86_S3S5: - need_mask = CHIPSET_STATE_SOFT_OFF | CHIPSET_STATE_SUSPEND; - break; - case X86_S3: - need_mask = CHIPSET_STATE_SUSPEND; - break; - case X86_S3S0: - case X86_S0S3: - need_mask = CHIPSET_STATE_SUSPEND | CHIPSET_STATE_ON; - break; - case X86_S0: - need_mask = CHIPSET_STATE_ON; - break; - } - - /* Return non-zero if all needed bits are present */ - return (state_mask & need_mask) == need_mask; -} - -void chipset_exit_hard_off(void) -{ - /* If not in the hard-off state nor headed there, nothing to do */ - if (state != X86_G3 && state != X86_S5G3) - return; - - /* Set a flag to leave G3, then wake the task */ - want_g3_exit = 1; - - if (task_start_called()) - task_wake(TASK_ID_CHIPSET); -} - -void chipset_throttle_cpu(int throttle) -{ - throttle_cpu = throttle; - - /* Immediately set throttling if CPU is on */ - if (state == X86_S0) - gpio_set_level(GPIO_CPU_PROCHOT, throttle); -} - -/*****************************************************************************/ -/* Hooks */ - -static void x86_lid_change(void) -{ - /* Wake up the task to update power state */ - task_wake(TASK_ID_CHIPSET); -} -DECLARE_HOOK(HOOK_LID_CHANGE, x86_lid_change, HOOK_PRIO_DEFAULT); - -static void x86_power_ac_change(void) -{ - if (extpower_is_present()) { - CPRINTF("[%T x86 AC on]\n"); - } else { - CPRINTF("[%T x86 AC off]\n"); - - if (state == X86_G3) { - last_shutdown_time = get_time().val; - task_wake(TASK_ID_CHIPSET); - } - } -} -DECLARE_HOOK(HOOK_AC_CHANGE, x86_power_ac_change, HOOK_PRIO_DEFAULT); - -static void x86_power_init(void) -{ - /* Update input state */ - update_in_signals(); - in_want = 0; - - /* The initial state is G3. Set shut down timestamp to now. */ - last_shutdown_time = get_time().val; - - /* - * If we're switching between images without rebooting, see if the x86 - * is already powered on; if so, leave it there instead of cycling - * through G3. - */ - if (system_jumped_to_this_image()) { - if ((in_signals & IN_ALL_S0) == IN_ALL_S0) { - CPRINTF("[%T x86 already in S0]\n"); - state = X86_S0; - } else { - /* Force all signals to their G3 states */ - CPRINTF("[%T x86 forcing G3]\n"); - gpio_set_level(GPIO_PCH_PWROK, 0); - gpio_set_level(GPIO_ENABLE_VCORE, 0); - gpio_set_level(GPIO_ENABLE_VS, 0); - gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); - gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); - gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); - gpio_set_level(GPIO_PCH_RSMRST_L, 0); - gpio_set_level(GPIO_PCH_DPWROK, 0); - } - } - - /* Enable interrupts for our GPIOs */ - gpio_enable_interrupt(GPIO_PCH_BKLTEN); - gpio_enable_interrupt(GPIO_PCH_SLP_A_L); - gpio_enable_interrupt(GPIO_PCH_SLP_ME_CSW_DEV_L); - gpio_enable_interrupt(GPIO_PCH_SLP_S3_L); - gpio_enable_interrupt(GPIO_PCH_SLP_S4_L); - gpio_enable_interrupt(GPIO_PCH_SLP_S5_L); - gpio_enable_interrupt(GPIO_PCH_SLP_SUS_L); - gpio_enable_interrupt(GPIO_PCH_SUSWARN_L); - gpio_enable_interrupt(GPIO_PGOOD_1_5V_DDR); - gpio_enable_interrupt(GPIO_PGOOD_1_5V_PCH); - gpio_enable_interrupt(GPIO_PGOOD_1_8VS); - gpio_enable_interrupt(GPIO_PGOOD_5VALW); - gpio_enable_interrupt(GPIO_PGOOD_CPU_CORE); - gpio_enable_interrupt(GPIO_PGOOD_VCCP); - gpio_enable_interrupt(GPIO_PGOOD_VCCSA); - gpio_enable_interrupt(GPIO_PGOOD_VGFX_CORE); -} -DECLARE_HOOK(HOOK_INIT, x86_power_init, HOOK_PRIO_INIT_CHIPSET); - -/*****************************************************************************/ -/* Interrupts */ - -void x86_power_interrupt(enum gpio_signal signal) -{ - /* Shadow signals and compare with our desired signal state. */ - update_in_signals(); - - /* Wake up the task */ - task_wake(TASK_ID_CHIPSET); -} - -/*****************************************************************************/ -/* Task function */ - -void chipset_task(void) -{ - uint64_t time_now; - - while (1) { - CPRINTF("[%T x86 power state %d = %s, in 0x%04x]\n", - state, state_names[state], in_signals); - - switch (state) { - case X86_G3: - if (want_g3_exit) { - want_g3_exit = 0; - state = X86_G3S5; - break; - } - - in_want = 0; - if (extpower_is_present()) - task_wait_event(-1); - else { - uint64_t target_time = last_shutdown_time + - hibernate_delay * 1000000ull; - time_now = get_time().val; - if (time_now > target_time) { - /* - * Time's up. Hibernate until wake pin - * asserted. - */ - CPRINTF("[%T x86 hibernating]\n"); - system_hibernate(0, 0); - } - else { - uint64_t wait = target_time - time_now; - if (wait > TASK_MAX_WAIT_US) - wait = TASK_MAX_WAIT_US; - - /* Wait for a message */ - task_wait_event(wait); - } - } - - break; - - case X86_S5: - if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 1) { - /* Power up to next state */ - state = X86_S5S3; - break; - } - - /* Wait for inactivity timeout */ - in_want = 0; - if (task_wait_event(S5_INACTIVITY_TIMEOUT) == - TASK_EVENT_TIMER) { - /* Drop to G3; wake not requested yet */ - want_g3_exit = 0; - state = X86_S5G3; - } - break; - - case X86_S3: - /* - * If lid is closed; hold touchscreen in reset to cut - * power usage. If lid is open, take touchscreen out - * of reset so it can wake the processor. - */ - gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, lid_is_open()); - - /* Check for state transitions */ - if (!have_all_in_signals(IN_PGOOD_S3)) { - /* Required rail went away */ - chipset_force_shutdown(); - state = X86_S3S5; - break; - } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { - /* Power up to next state */ - state = X86_S3S0; - break; - } else if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 0) { - /* Power down to next state */ - state = X86_S3S5; - break; - } - - /* Otherwise, steady state; wait for a message */ - in_want = 0; - task_wait_event(-1); - break; - - case X86_S0: - if (!have_all_in_signals(IN_PGOOD_S0)) { - /* Required rail went away */ - chipset_force_shutdown(); - state = X86_S0S3; - break; - } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { - /* Power down to next state */ - state = X86_S0S3; - break; - } - - /* Otherwise, steady state; wait for a message */ - in_want = 0; - task_wait_event(-1); - break; - - case X86_G3S5: - /* - * Wait 10ms after +3VALW good, since that powers - * VccDSW and VccSUS. - */ - msleep(10); - - /* Assert DPWROK, deassert RSMRST# */ - gpio_set_level(GPIO_PCH_DPWROK, 1); - gpio_set_level(GPIO_PCH_RSMRST_L, 1); - - /* Wait 5ms for SUSCLK to stabilize */ - msleep(5); - - state = X86_S5; - break; - - case X86_S5S3: - /* Wait for the always-on rails to be good */ - if (wait_in_signals(IN_PGOOD_ALWAYS_ON)) { - chipset_force_shutdown(); - state = X86_S5; - } - - /* - * Take lightbar out of reset, now that +5VALW is - * available and we won't leak +3VALW through the reset - * line. - */ - gpio_set_level(GPIO_LIGHTBAR_RESET_L, 1); - - /* Turn on power to RAM */ - gpio_set_level(GPIO_ENABLE_1_5V_DDR, 1); - if (wait_in_signals(IN_PGOOD_S3)) { - chipset_force_shutdown(); - state = X86_S5; - } - - /* - * Enable touchpad power so it can wake the system from - * suspend. - */ - gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1); - - /* Call hooks now that rails are up */ - hook_notify(HOOK_CHIPSET_STARTUP); - - state = X86_S3; - break; - - case X86_S3S0: - /* Turn on power rails */ - gpio_set_level(GPIO_ENABLE_VS, 1); - - /* Enable WLAN */ - gpio_set_level(GPIO_ENABLE_WLAN, 1); - gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 1); - gpio_set_level(GPIO_RADIO_ENABLE_BT, 1); - - /* - * Make sure touchscreen is out if reset (even if the - * lid is still closed); it may have been turned off if - * the lid was closed in S3. - */ - gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1); - - /* Wait for non-core power rails good */ - if (wait_in_signals(IN_PGOOD_S0)) { - chipset_force_shutdown(); - gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); - gpio_set_level(GPIO_ENABLE_WLAN, 0); - gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); - gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); - gpio_set_level(GPIO_ENABLE_VS, 0); - state = X86_S3; - } - - /* - * Enable +CPU_CORE and +VGFX_CORE regulator. The CPU - * itself will request the supplies when it's ready. - */ - gpio_set_level(GPIO_ENABLE_VCORE, 1); - - /* Call hooks now that rails are up */ - hook_notify(HOOK_CHIPSET_RESUME); - - /* Wait 99ms after all voltages good */ - msleep(99); - - /* - * Throttle CPU if necessary. This should only be - * asserted when +VCCP is powered (it is by now). - */ - gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu); - - /* Set PCH_PWROK */ - gpio_set_level(GPIO_PCH_PWROK, 1); - - state = X86_S0; - break; - - case X86_S0S3: - /* Call hooks before we remove power rails */ - hook_notify(HOOK_CHIPSET_SUSPEND); - - /* Clear PCH_PWROK */ - gpio_set_level(GPIO_PCH_PWROK, 0); - - /* Wait 40ns */ - udelay(1); - - /* Disable +CPU_CORE and +VGFX_CORE */ - gpio_set_level(GPIO_ENABLE_VCORE, 0); - - /* Disable WLAN */ - gpio_set_level(GPIO_ENABLE_WLAN, 0); - gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); - gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); - - /* - * Deassert prochot since CPU is off and we're about - * to drop +VCCP. - */ - gpio_set_level(GPIO_CPU_PROCHOT, 0); - - /* Turn off power rails */ - gpio_set_level(GPIO_ENABLE_VS, 0); - - state = X86_S3; - break; - - case X86_S3S5: - /* Call hooks before we remove power rails */ - hook_notify(HOOK_CHIPSET_SHUTDOWN); - - /* Disable touchpad power */ - gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); - - /* Turn off power to RAM */ - gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); - - /* - * Put touchscreen and lightbar in reset, so we won't - * leak +3VALW through the reset line to chips powered - * by +5VALW. - * - * (Note that we're no longer powering down +5VALW due - * to crosbug.com/p/16600, but to minimize side effects - * of that change we'll still reset these components in - * S5.) - */ - gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); - gpio_set_level(GPIO_LIGHTBAR_RESET_L, 0); - - state = X86_S5; - break; - - case X86_S5G3: - /* Deassert DPWROK, assert RSMRST# */ - gpio_set_level(GPIO_PCH_DPWROK, 0); - gpio_set_level(GPIO_PCH_RSMRST_L, 0); - - /* Record the time we go into G3 */ - last_shutdown_time = get_time().val; - - state = X86_G3; - break; - } - } -} - -/*****************************************************************************/ -/* Console commands */ - -static int command_powerinfo(int argc, char **argv) -{ - /* - * Print x86 power state in same format as state machine. This is - * used by FAFT tests, so must match exactly. - */ - ccprintf("[%T x86 power state %d = %s, in 0x%04x]\n", - state, state_names[state], in_signals); - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(powerinfo, command_powerinfo, - NULL, - "Show current x86 power state", - NULL); - -static int command_x86indebug(int argc, char **argv) -{ - char *e; - - /* If one arg, set the mask */ - if (argc == 2) { - int m = strtoi(argv[1], &e, 0); - if (*e) - return EC_ERROR_PARAM1; - - in_debug = m; - } - - /* Print the mask */ - ccprintf("x86 in: 0x%04x\n", in_signals); - ccprintf("debug mask: 0x%04x\n", in_debug); - return EC_SUCCESS; -}; -DECLARE_CONSOLE_COMMAND(x86indebug, command_x86indebug, - "[mask]", - "Get/set x86 input debug mask", - NULL); - -static int command_hibernation_delay(int argc, char **argv) -{ - char *e; - uint32_t time_g3 = ((uint32_t)(get_time().val - last_shutdown_time)) - / SECOND; - - if (argc >= 2) { - uint32_t s = strtoi(argv[1], &e, 0); - if (*e) - return EC_ERROR_PARAM1; - - hibernate_delay = s; - } - - /* Print the current setting */ - ccprintf("Hibernation delay: %d s\n", hibernate_delay); - if (state == X86_G3 && !extpower_is_present()) { - ccprintf("Time G3: %d s\n", time_g3); - ccprintf("Time left: %d s\n", hibernate_delay - time_g3); - } - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(hibdelay, command_hibernation_delay, - "[sec]", - "Set the delay before going into hibernation", - NULL); diff --git a/common/x86_power_haswell.c b/common/x86_power_haswell.c new file mode 100644 index 0000000000..469702b224 --- /dev/null +++ b/common/x86_power_haswell.c @@ -0,0 +1,768 @@ +/* Copyright (c) 2013 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. + */ + +/* X86 chipset power control module for Chrome EC */ + +#include "chipset.h" +#include "common.h" +#include "console.h" +#include "extpower.h" +#include "gpio.h" +#include "hooks.h" +#include "host_command.h" +#include "lid_switch.h" +#include "switch.h" +#include "system.h" +#include "task.h" +#include "timer.h" +#include "util.h" +#include "x86_power.h" + +/* Console output macros */ +#define CPUTS(outstr) cputs(CC_CHIPSET, outstr) +#define CPRINTF(format, args...) cprintf(CC_CHIPSET, format, ## args) + +/* + * Default timeout in us; if we've been waiting this long for an input + * transition, just jump to the next state. + */ +#define DEFAULT_TIMEOUT SECOND + +/* Timeout for dropping back from S5 to G3 */ +#define S5_INACTIVITY_TIMEOUT (10 * SECOND) + +enum x86_state { + X86_G3 = 0, /* + * System is off (not technically all the + * way into G3, which means totally + * unpowered...) + */ + X86_S5, /* System is soft-off */ + X86_S3, /* Suspend; RAM on, processor is asleep */ + X86_S0, /* System is on */ + + /* Transitions */ + X86_G3S5, /* G3 -> S5 (at system init time) */ + X86_S5S3, /* S5 -> S3 */ + X86_S3S0, /* S3 -> S0 */ + X86_S0S3, /* S0 -> S3 */ + X86_S3S5, /* S3 -> S5 */ + X86_S5G3, /* S5 -> G3 */ +}; + +static const char * const state_names[] = { + "G3", + "S5", + "S3", + "S0", + "G3->S5", + "S5->S3", + "S3->S0", + "S0->S3", + "S3->S5", + "S5->G3", +}; + +/* Input state flags */ +#define IN_PGOOD_5VALW 0x0001 +#define IN_PGOOD_1_5V_DDR 0x0002 +#define IN_PGOOD_1_5V_PCH 0x0004 +#define IN_PGOOD_1_8VS 0x0008 +#define IN_PGOOD_VCCP 0x0010 +#define IN_PGOOD_VCCSA 0x0020 +#define IN_PGOOD_CPU_CORE 0x0040 +#define IN_PGOOD_VGFX_CORE 0x0080 +#define IN_PCH_SLP_S3n_DEASSERTED 0x0100 +#define IN_PCH_SLP_S4n_DEASSERTED 0x0200 +#define IN_PCH_SLP_S5n_DEASSERTED 0x0400 +#define IN_PCH_SLP_An_DEASSERTED 0x0800 +#define IN_PCH_SLP_SUSn_DEASSERTED 0x1000 +#define IN_PCH_SLP_MEn_DEASSERTED 0x2000 +#define IN_PCH_SUSWARNn_DEASSERTED 0x4000 +/* All always-on supplies */ +#define IN_PGOOD_ALWAYS_ON (IN_PGOOD_5VALW) +/* All non-core power rails */ +#define IN_PGOOD_ALL_NONCORE (IN_PGOOD_1_5V_DDR | IN_PGOOD_1_5V_PCH | \ + IN_PGOOD_1_8VS | IN_PGOOD_VCCP | IN_PGOOD_VCCSA) +/* All core power rails */ +#define IN_PGOOD_ALL_CORE (IN_PGOOD_CPU_CORE | IN_PGOOD_VGFX_CORE) +/* Rails required for S3 */ +#define IN_PGOOD_S3 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_1_5V_DDR) +/* Rails required for S0 */ +#define IN_PGOOD_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE) + +/* All PM_SLP signals from PCH deasserted */ +#define IN_ALL_PM_SLP_DEASSERTED (IN_PCH_SLP_S3n_DEASSERTED | \ + IN_PCH_SLP_S4n_DEASSERTED | \ + IN_PCH_SLP_S5n_DEASSERTED | \ + IN_PCH_SLP_An_DEASSERTED) +/* All inputs in the right state for S0 */ +#define IN_ALL_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE | \ + IN_PGOOD_CPU_CORE | IN_ALL_PM_SLP_DEASSERTED) + +static enum x86_state state = X86_G3; /* Current state */ +static uint32_t in_signals; /* Current input signal states (IN_PGOOD_*) */ +static uint32_t in_want; /* Input signal state we're waiting for */ +static uint32_t in_debug; /* Signal values which print debug output */ +static int want_g3_exit; /* Should we exit the G3 state? */ +static int throttle_cpu; /* Throttle CPU? */ + +/* When did we enter G3? */ +static uint64_t last_shutdown_time; +/* Delay before go into hibernation in seconds*/ +static uint32_t hibernate_delay = 3600; /* 1 Hour */ + +/** + * Update input signal state. + */ +static void update_in_signals(void) +{ + uint32_t inew = 0; + int v; + + if (gpio_get_level(GPIO_PGOOD_5VALW)) + inew |= IN_PGOOD_5VALW; + + if (gpio_get_level(GPIO_PGOOD_1_5V_DDR)) + inew |= IN_PGOOD_1_5V_DDR; + if (gpio_get_level(GPIO_PGOOD_1_5V_PCH)) + inew |= IN_PGOOD_1_5V_PCH; + if (gpio_get_level(GPIO_PGOOD_1_8VS)) + inew |= IN_PGOOD_1_8VS; + if (gpio_get_level(GPIO_PGOOD_VCCP)) + inew |= IN_PGOOD_VCCP; + if (gpio_get_level(GPIO_PGOOD_VCCSA)) + inew |= IN_PGOOD_VCCSA; + + if (gpio_get_level(GPIO_PGOOD_CPU_CORE)) + inew |= IN_PGOOD_CPU_CORE; + if (gpio_get_level(GPIO_PGOOD_VGFX_CORE)) + inew |= IN_PGOOD_VGFX_CORE; + + if (gpio_get_level(GPIO_PCH_SLP_A_L)) + inew |= IN_PCH_SLP_An_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S3_L)) + inew |= IN_PCH_SLP_S3n_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S4_L)) + inew |= IN_PCH_SLP_S4n_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S5_L)) + inew |= IN_PCH_SLP_S5n_DEASSERTED; + + if (gpio_get_level(GPIO_PCH_SLP_SUS_L)) + inew |= IN_PCH_SLP_SUSn_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_ME_CSW_DEV_L)) + inew |= IN_PCH_SLP_MEn_DEASSERTED; + + v = gpio_get_level(GPIO_PCH_SUSWARN_L); + if (v) + inew |= IN_PCH_SUSWARNn_DEASSERTED; + /* Copy SUSWARN# signal from PCH to SUSACK# */ + gpio_set_level(GPIO_PCH_SUSACK_L, v); + + if ((in_signals & in_debug) != (inew & in_debug)) + CPRINTF("[%T x86 in 0x%04x]\n", inew); + + in_signals = inew; +} + +/** + * Check for required inputs + * + * @param want Input flags which must be present (IN_*) + * + * @return Non-zero if all present; zero if a required signal is missing. + */ +static int have_all_in_signals(uint32_t want) +{ + if ((in_signals & want) == want) + return 1; + + CPRINTF("[%T x86 power lost input; wanted 0x%04x, got 0x%04x]\n", + want, in_signals & want); + + return 0; +} + +/** + * Wait for inputs to be present + * + * @param want Input flags which must be present (IN_*) + * + * @return EC_SUCCESS when all inputs are present, or ERROR_TIMEOUT if timeout + * before reaching the desired state. + */ +static int wait_in_signals(uint32_t want) +{ + in_want = want; + + while ((in_signals & in_want) != in_want) { + if (task_wait_event(DEFAULT_TIMEOUT) == TASK_EVENT_TIMER) { + update_in_signals(); + CPRINTF("[%T x86 power timeout on input; " + "wanted 0x%04x, got 0x%04x]\n", + in_want, in_signals & in_want); + return EC_ERROR_TIMEOUT; + } + /* + * TODO: should really shrink the remaining timeout if we woke + * up but didn't have all the signals we wanted. Also need to + * handle aborts if we're no longer in the same state we were + * when we started waiting. + */ + } + return EC_SUCCESS; +} + +/*****************************************************************************/ +/* Chipset interface */ + +void chipset_force_shutdown(void) +{ + CPRINTF("[%T chipset force shutdown]\n"); + + /* + * Force x86 off. This condition will reset once the state machine + * transitions to G3. + */ + gpio_set_level(GPIO_PCH_DPWROK, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); +} + +void chipset_reset(int cold_reset) +{ + if (cold_reset) { + /* + * Drop and restore PWROK. This causes the PCH to reboot, + * regardless of its after-G3 setting. This type of reboot + * causes the PCH to assert PLTRST#, SLP_S3#, and SLP_S5#, so + * we actually drop power to the rest of the system (hence, a + * "cold" reboot). + */ + + /* Ignore if PWROK is already low */ + if (gpio_get_level(GPIO_PCH_PWROK) == 0) + return; + + /* PWROK must deassert for at least 3 RTC clocks = 91 us */ + gpio_set_level(GPIO_PCH_PWROK, 0); + udelay(100); + gpio_set_level(GPIO_PCH_PWROK, 1); + + } else { + /* + * Send a RCIN# pulse to the PCH. This just causes it to + * assert INIT# to the CPU without dropping power or asserting + * PLTRST# to reset the rest of the system. + */ + + /* Pulse must be at least 16 PCI clocks long = 500 ns */ + gpio_set_level(GPIO_PCH_RCIN_L, 0); + udelay(10); + gpio_set_level(GPIO_PCH_RCIN_L, 1); + } +} + +int chipset_in_state(int state_mask) +{ + int need_mask = 0; + + /* + * TODO: what to do about state transitions? If the caller wants + * HARD_OFF|SOFT_OFF and we're in G3S5, we could still return + * non-zero. + */ + switch (state) { + case X86_G3: + need_mask = CHIPSET_STATE_HARD_OFF; + break; + case X86_G3S5: + case X86_S5G3: + /* + * In between hard and soft off states. Match only if caller + * will accept both. + */ + need_mask = CHIPSET_STATE_HARD_OFF | CHIPSET_STATE_SOFT_OFF; + break; + case X86_S5: + need_mask = CHIPSET_STATE_SOFT_OFF; + break; + case X86_S5S3: + case X86_S3S5: + need_mask = CHIPSET_STATE_SOFT_OFF | CHIPSET_STATE_SUSPEND; + break; + case X86_S3: + need_mask = CHIPSET_STATE_SUSPEND; + break; + case X86_S3S0: + case X86_S0S3: + need_mask = CHIPSET_STATE_SUSPEND | CHIPSET_STATE_ON; + break; + case X86_S0: + need_mask = CHIPSET_STATE_ON; + break; + } + + /* Return non-zero if all needed bits are present */ + return (state_mask & need_mask) == need_mask; +} + +void chipset_exit_hard_off(void) +{ + /* If not in the hard-off state nor headed there, nothing to do */ + if (state != X86_G3 && state != X86_S5G3) + return; + + /* Set a flag to leave G3, then wake the task */ + want_g3_exit = 1; + + if (task_start_called()) + task_wake(TASK_ID_CHIPSET); +} + +void chipset_throttle_cpu(int throttle) +{ + throttle_cpu = throttle; + + /* Immediately set throttling if CPU is on */ + if (state == X86_S0) + gpio_set_level(GPIO_CPU_PROCHOT, throttle); +} + +/*****************************************************************************/ +/* Hooks */ + +static void x86_lid_change(void) +{ + /* Wake up the task to update power state */ + task_wake(TASK_ID_CHIPSET); +} +DECLARE_HOOK(HOOK_LID_CHANGE, x86_lid_change, HOOK_PRIO_DEFAULT); + +static void x86_power_ac_change(void) +{ + if (extpower_is_present()) { + CPRINTF("[%T x86 AC on]\n"); + } else { + CPRINTF("[%T x86 AC off]\n"); + + if (state == X86_G3) { + last_shutdown_time = get_time().val; + task_wake(TASK_ID_CHIPSET); + } + } +} +DECLARE_HOOK(HOOK_AC_CHANGE, x86_power_ac_change, HOOK_PRIO_DEFAULT); + +static void x86_power_init(void) +{ + /* Update input state */ + update_in_signals(); + in_want = 0; + + /* The initial state is G3. Set shut down timestamp to now. */ + last_shutdown_time = get_time().val; + + /* + * If we're switching between images without rebooting, see if the x86 + * is already powered on; if so, leave it there instead of cycling + * through G3. + */ + if (system_jumped_to_this_image()) { + if ((in_signals & IN_ALL_S0) == IN_ALL_S0) { + CPRINTF("[%T x86 already in S0]\n"); + state = X86_S0; + } else { + /* Force all signals to their G3 states */ + CPRINTF("[%T x86 forcing G3]\n"); + gpio_set_level(GPIO_PCH_PWROK, 0); + gpio_set_level(GPIO_ENABLE_VCORE, 0); + gpio_set_level(GPIO_ENABLE_VS, 0); + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); + gpio_set_level(GPIO_PCH_DPWROK, 0); + } + } + + /* Enable interrupts for our GPIOs */ + gpio_enable_interrupt(GPIO_PCH_BKLTEN); + gpio_enable_interrupt(GPIO_PCH_SLP_A_L); + gpio_enable_interrupt(GPIO_PCH_SLP_ME_CSW_DEV_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S3_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S4_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S5_L); + gpio_enable_interrupt(GPIO_PCH_SLP_SUS_L); + gpio_enable_interrupt(GPIO_PCH_SUSWARN_L); + gpio_enable_interrupt(GPIO_PGOOD_1_5V_DDR); + gpio_enable_interrupt(GPIO_PGOOD_1_5V_PCH); + gpio_enable_interrupt(GPIO_PGOOD_1_8VS); + gpio_enable_interrupt(GPIO_PGOOD_5VALW); + gpio_enable_interrupt(GPIO_PGOOD_CPU_CORE); + gpio_enable_interrupt(GPIO_PGOOD_VCCP); + gpio_enable_interrupt(GPIO_PGOOD_VCCSA); + gpio_enable_interrupt(GPIO_PGOOD_VGFX_CORE); +} +DECLARE_HOOK(HOOK_INIT, x86_power_init, HOOK_PRIO_INIT_CHIPSET); + +/*****************************************************************************/ +/* Interrupts */ + +void x86_power_interrupt(enum gpio_signal signal) +{ + /* Shadow signals and compare with our desired signal state. */ + update_in_signals(); + + /* Wake up the task */ + task_wake(TASK_ID_CHIPSET); +} + +/*****************************************************************************/ +/* Task function */ + +void chipset_task(void) +{ + uint64_t time_now; + + while (1) { + CPRINTF("[%T x86 power state %d = %s, in 0x%04x]\n", + state, state_names[state], in_signals); + + switch (state) { + case X86_G3: + if (want_g3_exit) { + want_g3_exit = 0; + state = X86_G3S5; + break; + } + + in_want = 0; + if (extpower_is_present()) + task_wait_event(-1); + else { + uint64_t target_time = last_shutdown_time + + hibernate_delay * 1000000ull; + time_now = get_time().val; + if (time_now > target_time) { + /* + * Time's up. Hibernate until wake pin + * asserted. + */ + CPRINTF("[%T x86 hibernating]\n"); + system_hibernate(0, 0); + } else { + uint64_t wait = target_time - time_now; + if (wait > TASK_MAX_WAIT_US) + wait = TASK_MAX_WAIT_US; + + /* Wait for a message */ + task_wait_event(wait); + } + } + + break; + + case X86_S5: + if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 1) { + /* Power up to next state */ + state = X86_S5S3; + break; + } + + /* Wait for inactivity timeout */ + in_want = 0; + if (task_wait_event(S5_INACTIVITY_TIMEOUT) == + TASK_EVENT_TIMER) { + /* Drop to G3; wake not requested yet */ + want_g3_exit = 0; + state = X86_S5G3; + } + break; + + case X86_S3: + /* + * If lid is closed; hold touchscreen in reset to cut + * power usage. If lid is open, take touchscreen out + * of reset so it can wake the processor. + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, lid_is_open()); + + /* Check for state transitions */ + if (!have_all_in_signals(IN_PGOOD_S3)) { + /* Required rail went away */ + chipset_force_shutdown(); + state = X86_S3S5; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { + /* Power up to next state */ + state = X86_S3S0; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 0) { + /* Power down to next state */ + state = X86_S3S5; + break; + } + + /* Otherwise, steady state; wait for a message */ + in_want = 0; + task_wait_event(-1); + break; + + case X86_S0: + if (!have_all_in_signals(IN_PGOOD_S0)) { + /* Required rail went away */ + chipset_force_shutdown(); + state = X86_S0S3; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { + /* Power down to next state */ + state = X86_S0S3; + break; + } + + /* Otherwise, steady state; wait for a message */ + in_want = 0; + task_wait_event(-1); + break; + + case X86_G3S5: + /* + * Wait 10ms after +3VALW good, since that powers + * VccDSW and VccSUS. + */ + msleep(10); + + /* Assert DPWROK, deassert RSMRST# */ + gpio_set_level(GPIO_PCH_DPWROK, 1); + gpio_set_level(GPIO_PCH_RSMRST_L, 1); + + /* Wait 5ms for SUSCLK to stabilize */ + msleep(5); + + state = X86_S5; + break; + + case X86_S5S3: + /* Wait for the always-on rails to be good */ + if (wait_in_signals(IN_PGOOD_ALWAYS_ON)) { + chipset_force_shutdown(); + state = X86_S5; + } + + /* + * Take lightbar out of reset, now that +5VALW is + * available and we won't leak +3VALW through the reset + * line. + */ + gpio_set_level(GPIO_LIGHTBAR_RESET_L, 1); + + /* Turn on power to RAM */ + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 1); + if (wait_in_signals(IN_PGOOD_S3)) { + chipset_force_shutdown(); + state = X86_S5; + } + + /* + * Enable touchpad power so it can wake the system from + * suspend. + */ + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1); + + /* Call hooks now that rails are up */ + hook_notify(HOOK_CHIPSET_STARTUP); + + state = X86_S3; + break; + + case X86_S3S0: + /* Turn on power rails */ + gpio_set_level(GPIO_ENABLE_VS, 1); + + /* Enable WLAN */ + gpio_set_level(GPIO_ENABLE_WLAN, 1); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 1); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 1); + + /* + * Make sure touchscreen is out if reset (even if the + * lid is still closed); it may have been turned off if + * the lid was closed in S3. + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1); + + /* Wait for non-core power rails good */ + if (wait_in_signals(IN_PGOOD_S0)) { + chipset_force_shutdown(); + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); + gpio_set_level(GPIO_ENABLE_VS, 0); + state = X86_S3; + } + + /* + * Enable +CPU_CORE and +VGFX_CORE regulator. The CPU + * itself will request the supplies when it's ready. + */ + gpio_set_level(GPIO_ENABLE_VCORE, 1); + + /* Call hooks now that rails are up */ + hook_notify(HOOK_CHIPSET_RESUME); + + /* Wait 99ms after all voltages good */ + msleep(99); + + /* + * Throttle CPU if necessary. This should only be + * asserted when +VCCP is powered (it is by now). + */ + gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu); + + /* Set PCH_PWROK */ + gpio_set_level(GPIO_PCH_PWROK, 1); + + state = X86_S0; + break; + + case X86_S0S3: + /* Call hooks before we remove power rails */ + hook_notify(HOOK_CHIPSET_SUSPEND); + + /* Clear PCH_PWROK */ + gpio_set_level(GPIO_PCH_PWROK, 0); + + /* Wait 40ns */ + udelay(1); + + /* Disable +CPU_CORE and +VGFX_CORE */ + gpio_set_level(GPIO_ENABLE_VCORE, 0); + + /* Disable WLAN */ + gpio_set_level(GPIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); + + /* + * Deassert prochot since CPU is off and we're about + * to drop +VCCP. + */ + gpio_set_level(GPIO_CPU_PROCHOT, 0); + + /* Turn off power rails */ + gpio_set_level(GPIO_ENABLE_VS, 0); + + state = X86_S3; + break; + + case X86_S3S5: + /* Call hooks before we remove power rails */ + hook_notify(HOOK_CHIPSET_SHUTDOWN); + + /* Disable touchpad power */ + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); + + /* Turn off power to RAM */ + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); + + /* + * Put touchscreen and lightbar in reset, so we won't + * leak +3VALW through the reset line to chips powered + * by +5VALW. + * + * (Note that we're no longer powering down +5VALW due + * to crosbug.com/p/16600, but to minimize side effects + * of that change we'll still reset these components in + * S5.) + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_LIGHTBAR_RESET_L, 0); + + state = X86_S5; + break; + + case X86_S5G3: + /* Deassert DPWROK, assert RSMRST# */ + gpio_set_level(GPIO_PCH_DPWROK, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); + + /* Record the time we go into G3 */ + last_shutdown_time = get_time().val; + + state = X86_G3; + break; + } + } +} + +/*****************************************************************************/ +/* Console commands */ + +static int command_powerinfo(int argc, char **argv) +{ + /* + * Print x86 power state in same format as state machine. This is + * used by FAFT tests, so must match exactly. + */ + ccprintf("[%T x86 power state %d = %s, in 0x%04x]\n", + state, state_names[state], in_signals); + + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(powerinfo, command_powerinfo, + NULL, + "Show current x86 power state", + NULL); + +static int command_x86indebug(int argc, char **argv) +{ + char *e; + + /* If one arg, set the mask */ + if (argc == 2) { + int m = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + + in_debug = m; + } + + /* Print the mask */ + ccprintf("x86 in: 0x%04x\n", in_signals); + ccprintf("debug mask: 0x%04x\n", in_debug); + return EC_SUCCESS; +}; +DECLARE_CONSOLE_COMMAND(x86indebug, command_x86indebug, + "[mask]", + "Get/set x86 input debug mask", + NULL); + +static int command_hibernation_delay(int argc, char **argv) +{ + char *e; + uint32_t time_g3 = ((uint32_t)(get_time().val - last_shutdown_time)) + / SECOND; + + if (argc >= 2) { + uint32_t s = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + + hibernate_delay = s; + } + + /* Print the current setting */ + ccprintf("Hibernation delay: %d s\n", hibernate_delay); + if (state == X86_G3 && !extpower_is_present()) { + ccprintf("Time G3: %d s\n", time_g3); + ccprintf("Time left: %d s\n", hibernate_delay - time_g3); + } + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(hibdelay, command_hibernation_delay, + "[sec]", + "Set the delay before going into hibernation", + NULL); diff --git a/common/x86_power_ivybridge.c b/common/x86_power_ivybridge.c new file mode 100644 index 0000000000..469702b224 --- /dev/null +++ b/common/x86_power_ivybridge.c @@ -0,0 +1,768 @@ +/* Copyright (c) 2013 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. + */ + +/* X86 chipset power control module for Chrome EC */ + +#include "chipset.h" +#include "common.h" +#include "console.h" +#include "extpower.h" +#include "gpio.h" +#include "hooks.h" +#include "host_command.h" +#include "lid_switch.h" +#include "switch.h" +#include "system.h" +#include "task.h" +#include "timer.h" +#include "util.h" +#include "x86_power.h" + +/* Console output macros */ +#define CPUTS(outstr) cputs(CC_CHIPSET, outstr) +#define CPRINTF(format, args...) cprintf(CC_CHIPSET, format, ## args) + +/* + * Default timeout in us; if we've been waiting this long for an input + * transition, just jump to the next state. + */ +#define DEFAULT_TIMEOUT SECOND + +/* Timeout for dropping back from S5 to G3 */ +#define S5_INACTIVITY_TIMEOUT (10 * SECOND) + +enum x86_state { + X86_G3 = 0, /* + * System is off (not technically all the + * way into G3, which means totally + * unpowered...) + */ + X86_S5, /* System is soft-off */ + X86_S3, /* Suspend; RAM on, processor is asleep */ + X86_S0, /* System is on */ + + /* Transitions */ + X86_G3S5, /* G3 -> S5 (at system init time) */ + X86_S5S3, /* S5 -> S3 */ + X86_S3S0, /* S3 -> S0 */ + X86_S0S3, /* S0 -> S3 */ + X86_S3S5, /* S3 -> S5 */ + X86_S5G3, /* S5 -> G3 */ +}; + +static const char * const state_names[] = { + "G3", + "S5", + "S3", + "S0", + "G3->S5", + "S5->S3", + "S3->S0", + "S0->S3", + "S3->S5", + "S5->G3", +}; + +/* Input state flags */ +#define IN_PGOOD_5VALW 0x0001 +#define IN_PGOOD_1_5V_DDR 0x0002 +#define IN_PGOOD_1_5V_PCH 0x0004 +#define IN_PGOOD_1_8VS 0x0008 +#define IN_PGOOD_VCCP 0x0010 +#define IN_PGOOD_VCCSA 0x0020 +#define IN_PGOOD_CPU_CORE 0x0040 +#define IN_PGOOD_VGFX_CORE 0x0080 +#define IN_PCH_SLP_S3n_DEASSERTED 0x0100 +#define IN_PCH_SLP_S4n_DEASSERTED 0x0200 +#define IN_PCH_SLP_S5n_DEASSERTED 0x0400 +#define IN_PCH_SLP_An_DEASSERTED 0x0800 +#define IN_PCH_SLP_SUSn_DEASSERTED 0x1000 +#define IN_PCH_SLP_MEn_DEASSERTED 0x2000 +#define IN_PCH_SUSWARNn_DEASSERTED 0x4000 +/* All always-on supplies */ +#define IN_PGOOD_ALWAYS_ON (IN_PGOOD_5VALW) +/* All non-core power rails */ +#define IN_PGOOD_ALL_NONCORE (IN_PGOOD_1_5V_DDR | IN_PGOOD_1_5V_PCH | \ + IN_PGOOD_1_8VS | IN_PGOOD_VCCP | IN_PGOOD_VCCSA) +/* All core power rails */ +#define IN_PGOOD_ALL_CORE (IN_PGOOD_CPU_CORE | IN_PGOOD_VGFX_CORE) +/* Rails required for S3 */ +#define IN_PGOOD_S3 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_1_5V_DDR) +/* Rails required for S0 */ +#define IN_PGOOD_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE) + +/* All PM_SLP signals from PCH deasserted */ +#define IN_ALL_PM_SLP_DEASSERTED (IN_PCH_SLP_S3n_DEASSERTED | \ + IN_PCH_SLP_S4n_DEASSERTED | \ + IN_PCH_SLP_S5n_DEASSERTED | \ + IN_PCH_SLP_An_DEASSERTED) +/* All inputs in the right state for S0 */ +#define IN_ALL_S0 (IN_PGOOD_ALWAYS_ON | IN_PGOOD_ALL_NONCORE | \ + IN_PGOOD_CPU_CORE | IN_ALL_PM_SLP_DEASSERTED) + +static enum x86_state state = X86_G3; /* Current state */ +static uint32_t in_signals; /* Current input signal states (IN_PGOOD_*) */ +static uint32_t in_want; /* Input signal state we're waiting for */ +static uint32_t in_debug; /* Signal values which print debug output */ +static int want_g3_exit; /* Should we exit the G3 state? */ +static int throttle_cpu; /* Throttle CPU? */ + +/* When did we enter G3? */ +static uint64_t last_shutdown_time; +/* Delay before go into hibernation in seconds*/ +static uint32_t hibernate_delay = 3600; /* 1 Hour */ + +/** + * Update input signal state. + */ +static void update_in_signals(void) +{ + uint32_t inew = 0; + int v; + + if (gpio_get_level(GPIO_PGOOD_5VALW)) + inew |= IN_PGOOD_5VALW; + + if (gpio_get_level(GPIO_PGOOD_1_5V_DDR)) + inew |= IN_PGOOD_1_5V_DDR; + if (gpio_get_level(GPIO_PGOOD_1_5V_PCH)) + inew |= IN_PGOOD_1_5V_PCH; + if (gpio_get_level(GPIO_PGOOD_1_8VS)) + inew |= IN_PGOOD_1_8VS; + if (gpio_get_level(GPIO_PGOOD_VCCP)) + inew |= IN_PGOOD_VCCP; + if (gpio_get_level(GPIO_PGOOD_VCCSA)) + inew |= IN_PGOOD_VCCSA; + + if (gpio_get_level(GPIO_PGOOD_CPU_CORE)) + inew |= IN_PGOOD_CPU_CORE; + if (gpio_get_level(GPIO_PGOOD_VGFX_CORE)) + inew |= IN_PGOOD_VGFX_CORE; + + if (gpio_get_level(GPIO_PCH_SLP_A_L)) + inew |= IN_PCH_SLP_An_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S3_L)) + inew |= IN_PCH_SLP_S3n_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S4_L)) + inew |= IN_PCH_SLP_S4n_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_S5_L)) + inew |= IN_PCH_SLP_S5n_DEASSERTED; + + if (gpio_get_level(GPIO_PCH_SLP_SUS_L)) + inew |= IN_PCH_SLP_SUSn_DEASSERTED; + if (gpio_get_level(GPIO_PCH_SLP_ME_CSW_DEV_L)) + inew |= IN_PCH_SLP_MEn_DEASSERTED; + + v = gpio_get_level(GPIO_PCH_SUSWARN_L); + if (v) + inew |= IN_PCH_SUSWARNn_DEASSERTED; + /* Copy SUSWARN# signal from PCH to SUSACK# */ + gpio_set_level(GPIO_PCH_SUSACK_L, v); + + if ((in_signals & in_debug) != (inew & in_debug)) + CPRINTF("[%T x86 in 0x%04x]\n", inew); + + in_signals = inew; +} + +/** + * Check for required inputs + * + * @param want Input flags which must be present (IN_*) + * + * @return Non-zero if all present; zero if a required signal is missing. + */ +static int have_all_in_signals(uint32_t want) +{ + if ((in_signals & want) == want) + return 1; + + CPRINTF("[%T x86 power lost input; wanted 0x%04x, got 0x%04x]\n", + want, in_signals & want); + + return 0; +} + +/** + * Wait for inputs to be present + * + * @param want Input flags which must be present (IN_*) + * + * @return EC_SUCCESS when all inputs are present, or ERROR_TIMEOUT if timeout + * before reaching the desired state. + */ +static int wait_in_signals(uint32_t want) +{ + in_want = want; + + while ((in_signals & in_want) != in_want) { + if (task_wait_event(DEFAULT_TIMEOUT) == TASK_EVENT_TIMER) { + update_in_signals(); + CPRINTF("[%T x86 power timeout on input; " + "wanted 0x%04x, got 0x%04x]\n", + in_want, in_signals & in_want); + return EC_ERROR_TIMEOUT; + } + /* + * TODO: should really shrink the remaining timeout if we woke + * up but didn't have all the signals we wanted. Also need to + * handle aborts if we're no longer in the same state we were + * when we started waiting. + */ + } + return EC_SUCCESS; +} + +/*****************************************************************************/ +/* Chipset interface */ + +void chipset_force_shutdown(void) +{ + CPRINTF("[%T chipset force shutdown]\n"); + + /* + * Force x86 off. This condition will reset once the state machine + * transitions to G3. + */ + gpio_set_level(GPIO_PCH_DPWROK, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); +} + +void chipset_reset(int cold_reset) +{ + if (cold_reset) { + /* + * Drop and restore PWROK. This causes the PCH to reboot, + * regardless of its after-G3 setting. This type of reboot + * causes the PCH to assert PLTRST#, SLP_S3#, and SLP_S5#, so + * we actually drop power to the rest of the system (hence, a + * "cold" reboot). + */ + + /* Ignore if PWROK is already low */ + if (gpio_get_level(GPIO_PCH_PWROK) == 0) + return; + + /* PWROK must deassert for at least 3 RTC clocks = 91 us */ + gpio_set_level(GPIO_PCH_PWROK, 0); + udelay(100); + gpio_set_level(GPIO_PCH_PWROK, 1); + + } else { + /* + * Send a RCIN# pulse to the PCH. This just causes it to + * assert INIT# to the CPU without dropping power or asserting + * PLTRST# to reset the rest of the system. + */ + + /* Pulse must be at least 16 PCI clocks long = 500 ns */ + gpio_set_level(GPIO_PCH_RCIN_L, 0); + udelay(10); + gpio_set_level(GPIO_PCH_RCIN_L, 1); + } +} + +int chipset_in_state(int state_mask) +{ + int need_mask = 0; + + /* + * TODO: what to do about state transitions? If the caller wants + * HARD_OFF|SOFT_OFF and we're in G3S5, we could still return + * non-zero. + */ + switch (state) { + case X86_G3: + need_mask = CHIPSET_STATE_HARD_OFF; + break; + case X86_G3S5: + case X86_S5G3: + /* + * In between hard and soft off states. Match only if caller + * will accept both. + */ + need_mask = CHIPSET_STATE_HARD_OFF | CHIPSET_STATE_SOFT_OFF; + break; + case X86_S5: + need_mask = CHIPSET_STATE_SOFT_OFF; + break; + case X86_S5S3: + case X86_S3S5: + need_mask = CHIPSET_STATE_SOFT_OFF | CHIPSET_STATE_SUSPEND; + break; + case X86_S3: + need_mask = CHIPSET_STATE_SUSPEND; + break; + case X86_S3S0: + case X86_S0S3: + need_mask = CHIPSET_STATE_SUSPEND | CHIPSET_STATE_ON; + break; + case X86_S0: + need_mask = CHIPSET_STATE_ON; + break; + } + + /* Return non-zero if all needed bits are present */ + return (state_mask & need_mask) == need_mask; +} + +void chipset_exit_hard_off(void) +{ + /* If not in the hard-off state nor headed there, nothing to do */ + if (state != X86_G3 && state != X86_S5G3) + return; + + /* Set a flag to leave G3, then wake the task */ + want_g3_exit = 1; + + if (task_start_called()) + task_wake(TASK_ID_CHIPSET); +} + +void chipset_throttle_cpu(int throttle) +{ + throttle_cpu = throttle; + + /* Immediately set throttling if CPU is on */ + if (state == X86_S0) + gpio_set_level(GPIO_CPU_PROCHOT, throttle); +} + +/*****************************************************************************/ +/* Hooks */ + +static void x86_lid_change(void) +{ + /* Wake up the task to update power state */ + task_wake(TASK_ID_CHIPSET); +} +DECLARE_HOOK(HOOK_LID_CHANGE, x86_lid_change, HOOK_PRIO_DEFAULT); + +static void x86_power_ac_change(void) +{ + if (extpower_is_present()) { + CPRINTF("[%T x86 AC on]\n"); + } else { + CPRINTF("[%T x86 AC off]\n"); + + if (state == X86_G3) { + last_shutdown_time = get_time().val; + task_wake(TASK_ID_CHIPSET); + } + } +} +DECLARE_HOOK(HOOK_AC_CHANGE, x86_power_ac_change, HOOK_PRIO_DEFAULT); + +static void x86_power_init(void) +{ + /* Update input state */ + update_in_signals(); + in_want = 0; + + /* The initial state is G3. Set shut down timestamp to now. */ + last_shutdown_time = get_time().val; + + /* + * If we're switching between images without rebooting, see if the x86 + * is already powered on; if so, leave it there instead of cycling + * through G3. + */ + if (system_jumped_to_this_image()) { + if ((in_signals & IN_ALL_S0) == IN_ALL_S0) { + CPRINTF("[%T x86 already in S0]\n"); + state = X86_S0; + } else { + /* Force all signals to their G3 states */ + CPRINTF("[%T x86 forcing G3]\n"); + gpio_set_level(GPIO_PCH_PWROK, 0); + gpio_set_level(GPIO_ENABLE_VCORE, 0); + gpio_set_level(GPIO_ENABLE_VS, 0); + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); + gpio_set_level(GPIO_PCH_DPWROK, 0); + } + } + + /* Enable interrupts for our GPIOs */ + gpio_enable_interrupt(GPIO_PCH_BKLTEN); + gpio_enable_interrupt(GPIO_PCH_SLP_A_L); + gpio_enable_interrupt(GPIO_PCH_SLP_ME_CSW_DEV_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S3_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S4_L); + gpio_enable_interrupt(GPIO_PCH_SLP_S5_L); + gpio_enable_interrupt(GPIO_PCH_SLP_SUS_L); + gpio_enable_interrupt(GPIO_PCH_SUSWARN_L); + gpio_enable_interrupt(GPIO_PGOOD_1_5V_DDR); + gpio_enable_interrupt(GPIO_PGOOD_1_5V_PCH); + gpio_enable_interrupt(GPIO_PGOOD_1_8VS); + gpio_enable_interrupt(GPIO_PGOOD_5VALW); + gpio_enable_interrupt(GPIO_PGOOD_CPU_CORE); + gpio_enable_interrupt(GPIO_PGOOD_VCCP); + gpio_enable_interrupt(GPIO_PGOOD_VCCSA); + gpio_enable_interrupt(GPIO_PGOOD_VGFX_CORE); +} +DECLARE_HOOK(HOOK_INIT, x86_power_init, HOOK_PRIO_INIT_CHIPSET); + +/*****************************************************************************/ +/* Interrupts */ + +void x86_power_interrupt(enum gpio_signal signal) +{ + /* Shadow signals and compare with our desired signal state. */ + update_in_signals(); + + /* Wake up the task */ + task_wake(TASK_ID_CHIPSET); +} + +/*****************************************************************************/ +/* Task function */ + +void chipset_task(void) +{ + uint64_t time_now; + + while (1) { + CPRINTF("[%T x86 power state %d = %s, in 0x%04x]\n", + state, state_names[state], in_signals); + + switch (state) { + case X86_G3: + if (want_g3_exit) { + want_g3_exit = 0; + state = X86_G3S5; + break; + } + + in_want = 0; + if (extpower_is_present()) + task_wait_event(-1); + else { + uint64_t target_time = last_shutdown_time + + hibernate_delay * 1000000ull; + time_now = get_time().val; + if (time_now > target_time) { + /* + * Time's up. Hibernate until wake pin + * asserted. + */ + CPRINTF("[%T x86 hibernating]\n"); + system_hibernate(0, 0); + } else { + uint64_t wait = target_time - time_now; + if (wait > TASK_MAX_WAIT_US) + wait = TASK_MAX_WAIT_US; + + /* Wait for a message */ + task_wait_event(wait); + } + } + + break; + + case X86_S5: + if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 1) { + /* Power up to next state */ + state = X86_S5S3; + break; + } + + /* Wait for inactivity timeout */ + in_want = 0; + if (task_wait_event(S5_INACTIVITY_TIMEOUT) == + TASK_EVENT_TIMER) { + /* Drop to G3; wake not requested yet */ + want_g3_exit = 0; + state = X86_S5G3; + } + break; + + case X86_S3: + /* + * If lid is closed; hold touchscreen in reset to cut + * power usage. If lid is open, take touchscreen out + * of reset so it can wake the processor. + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, lid_is_open()); + + /* Check for state transitions */ + if (!have_all_in_signals(IN_PGOOD_S3)) { + /* Required rail went away */ + chipset_force_shutdown(); + state = X86_S3S5; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { + /* Power up to next state */ + state = X86_S3S0; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 0) { + /* Power down to next state */ + state = X86_S3S5; + break; + } + + /* Otherwise, steady state; wait for a message */ + in_want = 0; + task_wait_event(-1); + break; + + case X86_S0: + if (!have_all_in_signals(IN_PGOOD_S0)) { + /* Required rail went away */ + chipset_force_shutdown(); + state = X86_S0S3; + break; + } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { + /* Power down to next state */ + state = X86_S0S3; + break; + } + + /* Otherwise, steady state; wait for a message */ + in_want = 0; + task_wait_event(-1); + break; + + case X86_G3S5: + /* + * Wait 10ms after +3VALW good, since that powers + * VccDSW and VccSUS. + */ + msleep(10); + + /* Assert DPWROK, deassert RSMRST# */ + gpio_set_level(GPIO_PCH_DPWROK, 1); + gpio_set_level(GPIO_PCH_RSMRST_L, 1); + + /* Wait 5ms for SUSCLK to stabilize */ + msleep(5); + + state = X86_S5; + break; + + case X86_S5S3: + /* Wait for the always-on rails to be good */ + if (wait_in_signals(IN_PGOOD_ALWAYS_ON)) { + chipset_force_shutdown(); + state = X86_S5; + } + + /* + * Take lightbar out of reset, now that +5VALW is + * available and we won't leak +3VALW through the reset + * line. + */ + gpio_set_level(GPIO_LIGHTBAR_RESET_L, 1); + + /* Turn on power to RAM */ + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 1); + if (wait_in_signals(IN_PGOOD_S3)) { + chipset_force_shutdown(); + state = X86_S5; + } + + /* + * Enable touchpad power so it can wake the system from + * suspend. + */ + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1); + + /* Call hooks now that rails are up */ + hook_notify(HOOK_CHIPSET_STARTUP); + + state = X86_S3; + break; + + case X86_S3S0: + /* Turn on power rails */ + gpio_set_level(GPIO_ENABLE_VS, 1); + + /* Enable WLAN */ + gpio_set_level(GPIO_ENABLE_WLAN, 1); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 1); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 1); + + /* + * Make sure touchscreen is out if reset (even if the + * lid is still closed); it may have been turned off if + * the lid was closed in S3. + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1); + + /* Wait for non-core power rails good */ + if (wait_in_signals(IN_PGOOD_S0)) { + chipset_force_shutdown(); + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); + gpio_set_level(GPIO_ENABLE_VS, 0); + state = X86_S3; + } + + /* + * Enable +CPU_CORE and +VGFX_CORE regulator. The CPU + * itself will request the supplies when it's ready. + */ + gpio_set_level(GPIO_ENABLE_VCORE, 1); + + /* Call hooks now that rails are up */ + hook_notify(HOOK_CHIPSET_RESUME); + + /* Wait 99ms after all voltages good */ + msleep(99); + + /* + * Throttle CPU if necessary. This should only be + * asserted when +VCCP is powered (it is by now). + */ + gpio_set_level(GPIO_CPU_PROCHOT, throttle_cpu); + + /* Set PCH_PWROK */ + gpio_set_level(GPIO_PCH_PWROK, 1); + + state = X86_S0; + break; + + case X86_S0S3: + /* Call hooks before we remove power rails */ + hook_notify(HOOK_CHIPSET_SUSPEND); + + /* Clear PCH_PWROK */ + gpio_set_level(GPIO_PCH_PWROK, 0); + + /* Wait 40ns */ + udelay(1); + + /* Disable +CPU_CORE and +VGFX_CORE */ + gpio_set_level(GPIO_ENABLE_VCORE, 0); + + /* Disable WLAN */ + gpio_set_level(GPIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_WLAN, 0); + gpio_set_level(GPIO_RADIO_ENABLE_BT, 0); + + /* + * Deassert prochot since CPU is off and we're about + * to drop +VCCP. + */ + gpio_set_level(GPIO_CPU_PROCHOT, 0); + + /* Turn off power rails */ + gpio_set_level(GPIO_ENABLE_VS, 0); + + state = X86_S3; + break; + + case X86_S3S5: + /* Call hooks before we remove power rails */ + hook_notify(HOOK_CHIPSET_SHUTDOWN); + + /* Disable touchpad power */ + gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); + + /* Turn off power to RAM */ + gpio_set_level(GPIO_ENABLE_1_5V_DDR, 0); + + /* + * Put touchscreen and lightbar in reset, so we won't + * leak +3VALW through the reset line to chips powered + * by +5VALW. + * + * (Note that we're no longer powering down +5VALW due + * to crosbug.com/p/16600, but to minimize side effects + * of that change we'll still reset these components in + * S5.) + */ + gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0); + gpio_set_level(GPIO_LIGHTBAR_RESET_L, 0); + + state = X86_S5; + break; + + case X86_S5G3: + /* Deassert DPWROK, assert RSMRST# */ + gpio_set_level(GPIO_PCH_DPWROK, 0); + gpio_set_level(GPIO_PCH_RSMRST_L, 0); + + /* Record the time we go into G3 */ + last_shutdown_time = get_time().val; + + state = X86_G3; + break; + } + } +} + +/*****************************************************************************/ +/* Console commands */ + +static int command_powerinfo(int argc, char **argv) +{ + /* + * Print x86 power state in same format as state machine. This is + * used by FAFT tests, so must match exactly. + */ + ccprintf("[%T x86 power state %d = %s, in 0x%04x]\n", + state, state_names[state], in_signals); + + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(powerinfo, command_powerinfo, + NULL, + "Show current x86 power state", + NULL); + +static int command_x86indebug(int argc, char **argv) +{ + char *e; + + /* If one arg, set the mask */ + if (argc == 2) { + int m = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + + in_debug = m; + } + + /* Print the mask */ + ccprintf("x86 in: 0x%04x\n", in_signals); + ccprintf("debug mask: 0x%04x\n", in_debug); + return EC_SUCCESS; +}; +DECLARE_CONSOLE_COMMAND(x86indebug, command_x86indebug, + "[mask]", + "Get/set x86 input debug mask", + NULL); + +static int command_hibernation_delay(int argc, char **argv) +{ + char *e; + uint32_t time_g3 = ((uint32_t)(get_time().val - last_shutdown_time)) + / SECOND; + + if (argc >= 2) { + uint32_t s = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + + hibernate_delay = s; + } + + /* Print the current setting */ + ccprintf("Hibernation delay: %d s\n", hibernate_delay); + if (state == X86_G3 && !extpower_is_present()) { + ccprintf("Time G3: %d s\n", time_g3); + ccprintf("Time left: %d s\n", hibernate_delay - time_g3); + } + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(hibdelay, command_hibernation_delay, + "[sec]", + "Set the delay before going into hibernation", + NULL); diff --git a/include/x86_power.h b/include/x86_power.h index 5693ea3d77..afdbd1b33b 100644 --- a/include/x86_power.h +++ b/include/x86_power.h @@ -10,13 +10,9 @@ #include "gpio.h" -#ifdef CONFIG_CHIPSET_X86 /** * Interrupt handler for x86 chipset GPIOs. */ void x86_power_interrupt(enum gpio_signal signal); -#else -#define x86_power_interrupt NULL -#endif #endif /* __CROS_EC_X86_POWER_H */ -- cgit v1.2.1