enum power_state power_chipset_init(void) { /* * 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 ((power_get_signals() & IN_ALL_S0) == IN_ALL_S0) { /* Disable idle task deep sleep when in S0. */ disable_sleep(SLEEP_MASK_AP_RUN); CPRINTS("already in S0"); return POWER_S0; } else { /* Force all signals to their G3 states */ CPRINTS("forcing G3"); gpio_set_level(GPIO_PCH_PWROK, 0); gpio_set_level(GPIO_SYS_PWROK, 0); gpio_set_level(GPIO_PP1050_EN, 0); gpio_set_level(GPIO_PP1200_EN, 0); gpio_set_level(GPIO_PP1800_EN, 0); gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 0); gpio_set_level(GPIO_PP5000_USB_EN, 0); gpio_set_level(GPIO_PP5000_EN, 0); gpio_set_level(GPIO_PCH_DPWROK, 0); gpio_set_level(GPIO_PP3300_DSW_EN, 0); wireless_set_state(WIRELESS_OFF); } } return POWER_G3; }
enum power_state power_handle_state(enum power_state state) { /* * Pass through RSMRST asynchronously, as PCH may not react * immediately to power changes. */ int rsmrst_in = gpio_get_level(GPIO_RSMRST_L_PGOOD); int rsmrst_out = gpio_get_level(GPIO_PCH_RSMRST_L); #ifdef GLADOS_BOARD_V2 int tries = 0; #endif if (rsmrst_in != rsmrst_out) { /* * Wait at least 10ms between power signals going high * and deasserting RSMRST to PCH. */ if (rsmrst_in) msleep(10); gpio_set_level(GPIO_PCH_RSMRST_L, rsmrst_in); CPRINTS("RSMRST: %d", rsmrst_in); } switch (state) { case POWER_G3: if (forcing_shutdown) { power_button_pch_release(); forcing_shutdown = 0; } break; case POWER_S5: if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1) return POWER_S5S3; /* Power up to next state */ break; case POWER_S3: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S3S5; } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { /* Power up to next state */ return POWER_S3S0; } else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) { /* Power down to next state */ return POWER_S3S5; } break; case POWER_S0: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { chipset_force_shutdown(); return POWER_S0S3; } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { /* Power down to next state */ return POWER_S0S3; } break; case POWER_G3S5: /* Call hooks to initialize PMIC */ hook_notify(HOOK_CHIPSET_PRE_INIT); if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) { chipset_force_shutdown(); return POWER_G3; } #ifdef GLADOS_BOARD_V2 /* * Allow up to 1s for charger to be initialized, in case * we're trying to boot the AP with no battery. */ while (charge_prevent_power_on() && tries++ < CHARGER_INITIALIZED_TRIES) { msleep(CHARGER_INITIALIZED_DELAY_MS); } /* Return to G3 if battery level is too low */ if (charge_want_shutdown() || tries == CHARGER_INITIALIZED_TRIES) { CPRINTS("power-up inhibited"); chipset_force_shutdown(); return POWER_G3; } /* Allow AP to power on */ gpio_set_level(GPIO_PMIC_SLP_SUS_L, 1); gpio_set_level(GPIO_PCH_BATLOW_L, 1); #endif return POWER_S5; case POWER_S5S3: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S5G3; } /* Enable TP + USB so that they can wake the system */ gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1); gpio_set_level(GPIO_USB1_ENABLE, 1); gpio_set_level(GPIO_USB2_ENABLE, 1); /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_STARTUP); return POWER_S3; case POWER_S3S0: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S3S5; } gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1); /* Enable wireless */ wireless_set_state(WIRELESS_ON); /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_RESUME); /* * Disable idle task deep sleep. This means that the low * power idle task will not go into deep sleep while in S0. */ disable_sleep(SLEEP_MASK_AP_RUN); /* * 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); return POWER_S0; case POWER_S0S3: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SUSPEND); gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0); /* Suspend wireless */ wireless_set_state(WIRELESS_SUSPEND); /* * Enable idle task deep sleep. Allow the low power idle task * to go into deep sleep in S3 or lower. */ enable_sleep(SLEEP_MASK_AP_RUN); return POWER_S3; case POWER_S3S5: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SHUTDOWN); /* Disable wireless */ wireless_set_state(WIRELESS_OFF); gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); gpio_set_level(GPIO_USB1_ENABLE, 0); gpio_set_level(GPIO_USB2_ENABLE, 0); return POWER_S5G3; case POWER_S5G3: #ifdef CONFIG_G3_SLEEP gpio_set_level(GPIO_G3_SLEEP_EN, 1); #endif chipset_force_g3(); return POWER_G3; default: break; } return state; }
static enum power_state _power_handle_state(enum power_state state) { int tries = 0; switch (state) { case POWER_G3: break; case POWER_S5: if (forcing_shutdown) { power_button_pch_release(); forcing_shutdown = 0; } #ifdef CONFIG_BOARD_HAS_RTC_RESET /* Wait for S5 exit and attempt RTC reset it supported */ if (power_s5_up) return power_wait_s5_rtc_reset(); #endif if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 1) return POWER_S5S3; /* Power up to next state */ break; case POWER_S3: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S3S5; } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { /* Power up to next state */ return POWER_S3S0; } else if (gpio_get_level(GPIO_PCH_SLP_S4_L) == 0) { /* Power down to next state */ return POWER_S3S5; } break; case POWER_S0: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { chipset_force_shutdown(); return POWER_S0S3; #ifdef CONFIG_POWER_S0IX } else if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 0) && (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) { return POWER_S0S0ix; #endif } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { /* Power down to next state */ return POWER_S0S3; } break; #ifdef CONFIG_POWER_S0IX case POWER_S0ix: /* * TODO: add code for unexpected power loss */ if ((gpio_get_level(GPIO_PCH_SLP_S0_L) == 1) && (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1)) { return POWER_S0ixS0; } break; #endif case POWER_G3S5: /* Call hooks to initialize PMIC */ hook_notify(HOOK_CHIPSET_PRE_INIT); /* * Allow up to 1s for charger to be initialized, in case * we're trying to boot the AP with no battery. */ while (charge_prevent_power_on(0) && tries++ < CHARGER_INITIALIZED_TRIES) { msleep(CHARGER_INITIALIZED_DELAY_MS); } /* Return to G3 if battery level is too low */ if (charge_want_shutdown() || tries > CHARGER_INITIALIZED_TRIES) { CPRINTS("power-up inhibited"); chipset_force_shutdown(); return POWER_G3; } if (power_wait_signals(IN_PCH_SLP_SUS_DEASSERTED)) { chipset_force_shutdown(); return POWER_G3; } power_s5_up = 1; return POWER_S5; case POWER_S5S3: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S5G3; } /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_STARTUP); return POWER_S3; case POWER_S3S0: if (!power_has_signals(IN_PGOOD_ALL_CORE)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S3S5; } gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1); /* Enable wireless */ wireless_set_state(WIRELESS_ON); /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_RESUME); /* * Disable idle task deep sleep. This means that the low * power idle task will not go into deep sleep while in S0. */ disable_sleep(SLEEP_MASK_AP_RUN); /* * 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); return POWER_S0; case POWER_S0S3: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SUSPEND); gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0); /* Suspend wireless */ wireless_set_state(WIRELESS_SUSPEND); /* * Enable idle task deep sleep. Allow the low power idle task * to go into deep sleep in S3 or lower. */ enable_sleep(SLEEP_MASK_AP_RUN); return POWER_S3; #ifdef CONFIG_POWER_S0IX case POWER_S0S0ix: /* call hooks before standby */ hook_notify(HOOK_CHIPSET_SUSPEND); lpc_enable_wake_mask_for_lid_open(); /* * Enable idle task deep sleep. Allow the low power idle task * to go into deep sleep in S0ix. */ enable_sleep(SLEEP_MASK_AP_RUN); return POWER_S0ix; case POWER_S0ixS0: lpc_disable_wake_mask_for_lid_open(); /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_RESUME); /* * Disable idle task deep sleep. This means that the low * power idle task will not go into deep sleep while in S0. */ disable_sleep(SLEEP_MASK_AP_RUN); return POWER_S0; #endif case POWER_S3S5: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SHUTDOWN); /* Disable wireless */ wireless_set_state(WIRELESS_OFF); /* Always enter into S5 state. The S5 state is required to * correctly handle global resets which have a bit of delay * while the SLP_Sx_L signals are asserted then deasserted. */ power_s5_up = 0; return POWER_S5; case POWER_S5G3: chipset_force_g3(); return POWER_G3; default: break; } return state; }
enum power_state power_handle_state(enum power_state state) { switch (state) { case POWER_G3: break; case POWER_S5: if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 1) return POWER_S5S3; /* Power up to next state */ break; case POWER_S3: /* Check for state transitions */ if (!power_has_signals(IN_PGOOD_S3)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S3S5; } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 1) { /* Power up to next state */ return POWER_S3S0; } else if (gpio_get_level(GPIO_PCH_SLP_S5_L) == 0) { /* Power down to next state */ return POWER_S3S5; } break; case POWER_S0: if (!power_has_signals(IN_PGOOD_S0)) { /* Required rail went away */ chipset_force_shutdown(); return POWER_S0S3; } else if (gpio_get_level(GPIO_PCH_SLP_S3_L) == 0) { /* Power down to next state */ return POWER_S0S3; } break; case POWER_G3S5: /* Enable 3.3V DSW */ gpio_set_level(GPIO_PP3300_DSW_EN, 1); /* * Wait 10ms after +3VALW good, since that powers VccDSW and * VccSUS. */ msleep(10); /* Enable PP5000 (5V) rail as 1.05V and 1.2V rails need 5V * rail to regulate properly. */ gpio_set_level(GPIO_PP5000_EN, 1); /* Wait for PP1050/PP1200 PGOOD to go LOW to * indicate that PP5000 is stable */ while ((power_get_signals() & IN_PGOOD_PP5000) != 0) { if (task_wait_event(SECOND) == TASK_EVENT_TIMER) { CPRINTS("timeout waiting for PP5000"); gpio_set_level(GPIO_PP5000_EN, 0); chipset_force_shutdown(); return POWER_G3; } } /* Turn on 3.3V DSW gated rail for core regulator */ gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 1); /* Assert DPWROK */ gpio_set_level(GPIO_PCH_DPWROK, 1); /* Enable PP1050 rail. */ gpio_set_level(GPIO_PP1050_EN, 1); /* Wait for 1.05V to come up and CPU to notice */ if (power_wait_signals(IN_PGOOD_PP1050 | IN_PCH_SLP_SUS_DEASSERTED)) { gpio_set_level(GPIO_PP1050_EN, 0); gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 0); gpio_set_level(GPIO_PP5000_EN, 0); chipset_force_shutdown(); return POWER_G3; } /* Wait 5ms for SUSCLK to stabilize */ msleep(5); /* Call hook to indicate out of G3 state */ hook_notify(HOOK_CHIPSET_PRE_INIT); return POWER_S5; case POWER_S5S3: /* Turn on power to RAM */ gpio_set_level(GPIO_PP1800_EN, 1); gpio_set_level(GPIO_PP1200_EN, 1); if (power_wait_signals(IN_PGOOD_S3)) { gpio_set_level(GPIO_PP1800_EN, 0); gpio_set_level(GPIO_PP1200_EN, 0); chipset_force_shutdown(); return POWER_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); /* * Enable touchpad power so it can wake the system from * suspend. */ gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1); /* Turn on USB power rail. */ gpio_set_level(GPIO_PP5000_USB_EN, 1); /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_STARTUP); return POWER_S3; case POWER_S3S0: /* Wait 20ms before allowing VCCST_PGOOD to rise. */ msleep(20); /* Enable wireless. */ wireless_set_state(WIRELESS_ON); /* Make sure the touchscreen is on, too. */ gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 1); /* Wait for non-core power rails good */ if (power_wait_signals(IN_PGOOD_S0)) { chipset_force_shutdown(); wireless_set_state(WIRELESS_OFF); return POWER_S3; } /* Call hooks now that rails are up */ hook_notify(HOOK_CHIPSET_RESUME); /* * Disable idle task deep sleep. This means that the low * power idle task will not go into deep sleep while in S0. */ disable_sleep(SLEEP_MASK_AP_RUN); /* 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); gpio_set_level(GPIO_SYS_PWROK, 1); return POWER_S0; case POWER_S0S3: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SUSPEND); /* Clear PCH_PWROK */ gpio_set_level(GPIO_SYS_PWROK, 0); gpio_set_level(GPIO_PCH_PWROK, 0); /* Wait 40ns */ udelay(1); /* Suspend wireless */ wireless_set_state(WIRELESS_SUSPEND); /* * Enable idle task deep sleep. Allow the low power idle task * to go into deep sleep in S3 or lower. */ enable_sleep(SLEEP_MASK_AP_RUN); /* * Deassert prochot since CPU is off and we're about to drop * +VCCP. */ gpio_set_level(GPIO_CPU_PROCHOT, 0); return POWER_S3; case POWER_S3S5: /* Call hooks before we remove power rails */ hook_notify(HOOK_CHIPSET_SHUTDOWN); /* Disable wireless */ wireless_set_state(WIRELESS_OFF); /* Disable peripheral power */ gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0); gpio_set_level(GPIO_PP5000_USB_EN, 0); /* Turn off power to RAM */ gpio_set_level(GPIO_PP1800_EN, 0); gpio_set_level(GPIO_PP1200_EN, 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); return pause_in_s5 ? POWER_S5 : POWER_S5G3; case POWER_S5G3: /* Deassert DPWROK */ gpio_set_level(GPIO_PCH_DPWROK, 0); /* Turn off power rails enabled in S5 */ gpio_set_level(GPIO_PP1050_EN, 0); gpio_set_level(GPIO_PP3300_DSW_GATED_EN, 0); gpio_set_level(GPIO_PP5000_EN, 0); /* Disable 3.3V DSW */ gpio_set_level(GPIO_PP3300_DSW_EN, 0); return POWER_G3; } return state; }