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kevin: battery: Revive batteries in soft-disconnect state

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ESC+F3+Power+AC removal puts the battery into a soft-disconnect state
where is stops supplying current. Revive batteries in this state by
supplying a precharge current.

BUG=chrome-os-partner:55617
BRANCH=None
TEST=Manual on kevin. Put battery into soft-disconnect state. Attach
charger and verify EC doesn't lose power and battery again supplies
current.

Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I8dfcfa90c723d627636d9bebca48429b9f1106f7
Reviewed-on: https://chromium-review.googlesource.com/363004
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
This commit is contained in:
Shawn Nematbakhsh
2016-07-25 16:25:52 -07:00
committed by chrome-bot
parent 4ffe42b427
commit e8a95db059
2 changed files with 54 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
board/kevin/battery.c
View File

@@ -10,6 +10,7 @@
#include "charge_state.h"
#include "console.h"
#include "ec_commands.h"
#include "extpower.h"
#include "util.h"
/* Shutdown mode parameter to write to manufacturer access register */
@@ -61,6 +62,58 @@ int board_cut_off_battery(void)
return rv ? EC_RES_ERROR : EC_RES_SUCCESS;
}
enum battery_disconnect_state battery_get_disconnect_state(void)
{
uint8_t data[6];
int rv;
/*
* Take note if we find that the battery isn't in disconnect state,
* and always return NOT_DISCONNECTED without probing the battery.
* This assumes the battery will not go to disconnect state during
* runtime.
*/
static int not_disconnected;
if (not_disconnected)
return BATTERY_NOT_DISCONNECTED;
if (extpower_is_present()) {
/* Check if battery charging + discharging is disabled. */
rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_OPERATION_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || (~data[3] & (BATTERY_DISCHARGING_DISABLED |
BATTERY_CHARGING_DISABLED))) {
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
/*
* Battery is neither charging nor discharging. Verify that
* we didn't enter this state due to a safety fault.
*/
rv = sb_write(SB_MANUFACTURER_ACCESS, PARAM_SAFETY_STATUS);
if (rv)
return BATTERY_DISCONNECT_ERROR;
rv = sb_read_string(I2C_PORT_BATTERY, BATTERY_ADDR,
SB_ALT_MANUFACTURER_ACCESS, data, 6);
if (rv || data[2] || data[3] || data[4] || data[5])
return BATTERY_DISCONNECT_ERROR;
/* No safety fault, battery is disconnected */
return BATTERY_DISCONNECTED;
}
not_disconnected = 1;
return BATTERY_NOT_DISCONNECTED;
}
int charger_profile_override(struct charge_state_data *curr)
{
const struct battery_info *batt_info;

1
board/kevin/board.h
View File

@@ -91,6 +91,7 @@
#define CONFIG_BATTERY_CUT_OFF
#define CONFIG_BATTERY_PRESENT_GPIO GPIO_EC_BATT_PRES_L
#define CONFIG_BATTERY_REVIVE_DISCONNECT
#define CONFIG_BATTERY_SMART
#ifdef BOARD_KEVIN