diff options
author | Chris Wang <chriswang@ami.corp-partner.google.com> | 2017-10-05 20:42:56 +0800 |
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committer | chrome-bot <chrome-bot@chromium.org> | 2017-10-23 04:28:27 -0700 |
commit | ca013a9780b7d043fc2c126377f297cd557a0e31 (patch) | |
tree | 000d6e47591a793287959c1636c72972e0155578 /board/nautilus/battery.c | |
parent | f45c06abc665d3114d67e5138531c81be0d43b59 (diff) | |
download | chrome-ec-ca013a9780b7d043fc2c126377f297cd557a0e31.tar.gz |
ec: add initial nautilus board
For now use the files from poppy. To be changed later on.
BUG=b:66458931
TEST=emerge-nautilus chromeos-ec/make buildall -j
Change-Id: If829d7307f834f1f30878934623c0e9ee77b907d
Signed-off-by: Chris Wang <chriswang@ami.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/701996
Commit-Ready: Grace Kao <grace.kao@intel.com>
Tested-by: Grace Kao <grace.kao@intel.com>
Reviewed-by: Philip Chen <philipchen@chromium.org>
Diffstat (limited to 'board/nautilus/battery.c')
-rw-r--r-- | board/nautilus/battery.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/board/nautilus/battery.c b/board/nautilus/battery.c new file mode 100644 index 0000000000..246250a88c --- /dev/null +++ b/board/nautilus/battery.c @@ -0,0 +1,172 @@ +/* Copyright 2016 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 parameter 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 = 9100, + /* Pre-charge values. */ + .precharge_current = 256, /* mA */ + + .start_charging_min_c = 0, + .start_charging_max_c = 50, + .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); +} + +int charger_profile_override(struct charge_state_data *curr) +{ + const struct battery_info *batt_info; + int bat_temp_c; + + batt_info = battery_get_info(); + + if ((curr->batt.flags & BATT_FLAG_BAD_ANY) == BATT_FLAG_BAD_ANY) { + curr->requested_current = batt_info->precharge_current; + curr->requested_voltage = batt_info->voltage_max; + return 1000; + } + + /* battery temp in 0.1 deg C */ + bat_temp_c = curr->batt.temperature - 2731; + + /* Don't charge if outside of allowable temperature range */ + if (bat_temp_c >= batt_info->charging_max_c * 10 || + bat_temp_c < batt_info->charging_min_c * 10) { + curr->requested_current = 0; + curr->requested_voltage = 0; + curr->batt.flags &= ~BATT_FLAG_WANT_CHARGE; + curr->state = ST_IDLE; + } + return 0; +} + +/* Customs options controllable by host command. */ +#define PARAM_FASTCHARGE (CS_PARAM_CUSTOM_PROFILE_MIN + 0) + +enum ec_status charger_profile_override_get_param(uint32_t param, + uint32_t *value) +{ + return EC_RES_INVALID_PARAM; +} + +enum ec_status charger_profile_override_set_param(uint32_t param, + uint32_t value) +{ + return EC_RES_INVALID_PARAM; +} + +enum battery_present battery_hw_present(void) +{ + /* The GPIO is low when the battery is physically present */ + return gpio_get_level(GPIO_BATTERY_PRESENT_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 + * success & 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; +} + |