diff options
Diffstat (limited to 'board/rammus/battery.c')
-rw-r--r-- | board/rammus/battery.c | 130 |
1 files changed, 0 insertions, 130 deletions
diff --git a/board/rammus/battery.c b/board/rammus/battery.c deleted file mode 100644 index 916aac5fd3..0000000000 --- a/board/rammus/battery.c +++ /dev/null @@ -1,130 +0,0 @@ -/* 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. - * - * Placeholder values for temporary battery pack. - */ - -#include "battery.h" -#include "battery_smart.h" -#include "charge_state.h" -#include "console.h" -#include "ec_commands.h" -#include "extpower.h" -#include "gpio.h" -#include "util.h" - -static enum battery_present batt_pres_prev = BP_NOT_SURE; - -/* Shutdown mode parameters to write to manufacturer access register */ -#define SB_SHIP_MODE_REG SB_MANUFACTURER_ACCESS -#define SB_SHUTDOWN_DATA 0x0010 - -static const struct battery_info info = { - .voltage_max = 13200, - .voltage_normal = 11550, - .voltage_min = 9000, - /* Pre-charge values. */ - .precharge_current = 256, /* mA */ - - .start_charging_min_c = 0, - .start_charging_max_c = 45, - .charging_min_c = 0, - .charging_max_c = 60, - .discharging_min_c = 0, - .discharging_max_c = 60, -}; - -const struct battery_info *battery_get_info(void) -{ - return &info; -} - -int board_cut_off_battery(void) -{ - int rv; - - /* Ship mode command must be sent twice to take effect */ - rv = sb_write(SB_SHIP_MODE_REG, SB_SHUTDOWN_DATA); - - if (rv != EC_SUCCESS) - return rv; - - return sb_write(SB_SHIP_MODE_REG, SB_SHUTDOWN_DATA); -} - -enum battery_present battery_hw_present(void) -{ - /* The GPIO is low when the battery is physically present */ - return gpio_get_level(GPIO_BATT_PRES_L) ? BP_NO : BP_YES; -} - -static int battery_init(void) -{ - int batt_status; - - return battery_status(&batt_status) ? 0 : - !!(batt_status & STATUS_INITIALIZED); -} - -/* - * Check for case where both XCHG and XDSG bits are set indicating that even - * though the FG can be read from the battery, the battery is not able to be - * charged or discharged. This situation will happen if a battery disconnect was - * intiaited via H1 setting the DISCONN signal to the battery. This will put the - * battery pack into a sleep state and when power is reconnected, the FG can be - * read, but the battery is still not able to provide power to the system. The - * calling function returns batt_pres = BP_NO, which instructs the charging - * state machine to prevent powering up the AP on battery alone which could lead - * to a brownout event when the battery isn't able yet to provide power to the - * system. . - */ -static int battery_check_disconnect(void) -{ - int rv; - uint8_t data[6]; - - /* Check if battery charging + discharging is disabled. */ - rv = sb_read_mfgacc(PARAM_OPERATION_STATUS, - SB_ALT_MANUFACTURER_ACCESS, data, sizeof(data)); - if (rv) - return BATTERY_DISCONNECT_ERROR; - - if ((data[3] & (BATTERY_DISCHARGING_DISABLED | - BATTERY_CHARGING_DISABLED)) == - (BATTERY_DISCHARGING_DISABLED | BATTERY_CHARGING_DISABLED)) - return BATTERY_DISCONNECTED; - - return BATTERY_NOT_DISCONNECTED; -} - -enum battery_present battery_is_present(void) -{ - enum battery_present batt_pres; - - /* Get the physical hardware status */ - batt_pres = battery_hw_present(); - - /* - * Make sure battery status is implemented, I2C transactions are - * successful & the battery status is initialized to find out if it - * is a working battery and it is not in the cut-off mode. - * - * If battery I2C fails but VBATT is high, battery is booting from - * cut-off mode. - * - * FETs are turned off after Power Shutdown time. - * The device will wake up when a voltage is applied to PACK. - * Battery status will be inactive until it is initialized. - */ - if (batt_pres == BP_YES && batt_pres_prev != batt_pres && - (battery_is_cut_off() != BATTERY_CUTOFF_STATE_NORMAL || - battery_check_disconnect() != BATTERY_NOT_DISCONNECTED || - battery_init() == 0)) { - batt_pres = BP_NO; - } - - batt_pres_prev = batt_pres; - return batt_pres; -} - |