static irqreturn_t pm860x_temp_handler(int irq, void *data)
{
struct power_supply *psy;
struct pm860x_charger_info *info = data;
union power_supply_propval temp;
int value;
int ret;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
return IRQ_HANDLED;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp);
if (ret)
goto out;
value = temp.intval / 10;
mutex_lock(&info->lock);
/* Temperature < -10 C or >40 C, Will not allow charge */
if (value < -10 || value > 40)
info->allowed = 0;
else
info->allowed = 1;
dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
mutex_unlock(&info->lock);
set_charging_fsm(info);
out:
power_supply_put(psy);
return IRQ_HANDLED;
}
static void ac_status_changed(void)
{
struct power_supply *psy = power_supply_get_by_name("olpc-ac");
if (psy) {
power_supply_changed(psy);
power_supply_put(psy);
}
}
static void raumfeld_power_signal_charged(void)
{
struct power_supply *psy =
power_supply_get_by_name(raumfeld_power_supplicants[0]);
if (psy) {
power_supply_set_battery_charged(psy);
power_supply_put(psy);
}
}
static irqreturn_t pm860x_done_handler(int irq, void *data)
{
struct pm860x_charger_info *info = data;
struct power_supply *psy;
union power_supply_propval val;
int ret;
int vbatt;
mutex_lock(&info->lock);
/* pre-charge done, will transimit to fast-charge stage */
if (info->state == FSM_PRECHARGE) {
info->allowed = 1;
goto out;
}
/*
* Fast charge done, delay to read
* the correct status of CHG_DET.
*/
mdelay(5);
info->allowed = 0;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
goto out;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&val);
if (ret)
goto out_psy_put;
vbatt = val.intval / 1000;
/*
* CHG_DONE interrupt is faster than CHG_DET interrupt when
* plug in/out usb, So we can not rely on info->online, we
* need check pm8607 status register to check usb is online
* or not, then we can decide it is real charge done
* automatically or it is triggered by usb plug out;
*/
ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
if (ret < 0)
goto out_psy_put;
if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG)
power_supply_set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL,
&val);
out_psy_put:
power_supply_put(psy);
out:
mutex_unlock(&info->lock);
dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed);
set_charging_fsm(info);
return IRQ_HANDLED;
}
static void olpc_xo175_ec_complete(void *arg)
{
struct olpc_xo175_ec *priv = arg;
struct device *dev = &priv->spi->dev;
struct power_supply *psy;
unsigned long flags;
u8 channel;
u8 byte;
int ret;
ret = priv->msg.status;
if (ret) {
dev_err(dev, "SPI transfer failed: %d\n", ret);
spin_lock_irqsave(&priv->cmd_state_lock, flags);
if (priv->cmd_running) {
priv->resp_len = 0;
priv->cmd_state = CMD_STATE_ERROR_RECEIVED;
complete(&priv->cmd_done);
}
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
if (ret != -EINTR)
olpc_xo175_ec_read_packet(priv);
return;
}
channel = priv->rx_buf.resp.channel;
byte = priv->rx_buf.resp.byte;
switch (channel) {
case CHAN_NONE:
spin_lock_irqsave(&priv->cmd_state_lock, flags);
if (!priv->cmd_running) {
/* We can safely ignore these */
dev_err(dev, "spurious FIFO read packet\n");
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
return;
}
priv->cmd_state = CMD_STATE_CMD_SENT;
if (!priv->expected_resp_len)
complete(&priv->cmd_done);
olpc_xo175_ec_read_packet(priv);
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
return;
case CHAN_SWITCH:
spin_lock_irqsave(&priv->cmd_state_lock, flags);
if (!priv->cmd_running) {
/* Just go with the flow */
dev_err(dev, "spurious SWITCH packet\n");
memset(&priv->cmd, 0, sizeof(priv->cmd));
priv->cmd.command = CMD_ECHO;
}
priv->cmd_state = CMD_STATE_CMD_IN_TX_FIFO;
/* Throw command into TxFIFO */
gpiod_set_value_cansleep(priv->gpio_cmd, 0);
olpc_xo175_ec_send_command(priv, &priv->cmd, sizeof(priv->cmd));
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
return;
case CHAN_CMD_RESP:
spin_lock_irqsave(&priv->cmd_state_lock, flags);
if (!priv->cmd_running) {
dev_err(dev, "spurious response packet\n");
} else if (priv->resp_len >= priv->expected_resp_len) {
dev_err(dev, "too many response packets\n");
} else {
priv->resp_data[priv->resp_len++] = byte;
if (priv->resp_len == priv->expected_resp_len) {
priv->cmd_state = CMD_STATE_RESP_RECEIVED;
complete(&priv->cmd_done);
}
}
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
break;
case CHAN_CMD_ERROR:
spin_lock_irqsave(&priv->cmd_state_lock, flags);
if (!priv->cmd_running) {
dev_err(dev, "spurious cmd error packet\n");
} else {
priv->resp_data[0] = byte;
priv->resp_len = 1;
priv->cmd_state = CMD_STATE_ERROR_RECEIVED;
complete(&priv->cmd_done);
}
spin_unlock_irqrestore(&priv->cmd_state_lock, flags);
break;
case CHAN_KEYBOARD:
dev_warn(dev, "keyboard is not supported\n");
break;
case CHAN_TOUCHPAD:
dev_warn(dev, "touchpad is not supported\n");
break;
case CHAN_EVENT:
dev_dbg(dev, "got event %.2x\n", byte);
switch (byte) {
case EVENT_AC_CHANGE:
psy = power_supply_get_by_name("olpc-ac");
if (psy) {
power_supply_changed(psy);
power_supply_put(psy);
}
break;
case EVENT_BATTERY_STATUS:
case EVENT_BATTERY_CRITICAL:
case EVENT_BATTERY_SOC_CHANGE:
case EVENT_BATTERY_ERROR:
psy = power_supply_get_by_name("olpc-battery");
if (psy) {
power_supply_changed(psy);
power_supply_put(psy);
}
break;
case EVENT_POWER_PRESSED:
input_report_key(priv->pwrbtn, KEY_POWER, 1);
input_sync(priv->pwrbtn);
input_report_key(priv->pwrbtn, KEY_POWER, 0);
input_sync(priv->pwrbtn);
/* fall through */
case EVENT_POWER_PRESS_WAKE:
case EVENT_TIMED_HOST_WAKE:
pm_wakeup_event(priv->pwrbtn->dev.parent,
PM_WAKEUP_TIME);
break;
default:
dev_dbg(dev, "ignored unknown event %.2x\n", byte);
break;
}
break;
case CHAN_DEBUG:
if (byte == '\n') {
olpc_xo175_ec_flush_logbuf(priv);
} else if (isprint(byte)) {
priv->logbuf[priv->logbuf_len++] = byte;
if (priv->logbuf_len == LOG_BUF_SIZE)
olpc_xo175_ec_flush_logbuf(priv);
}
break;
default:
dev_warn(dev, "unknown channel: %d, %.2x\n", channel, byte);
break;
}
/* Most non-command packets get the TxFIFO refilled and an ACK. */
olpc_xo175_ec_read_packet(priv);
}
static int set_charging_fsm(struct pm860x_charger_info *info)
{
struct power_supply *psy;
union power_supply_propval data;
unsigned char fsm_state[][16] = { "init", "discharge", "precharge",
"fastcharge",
};
int ret;
int vbatt;
psy = power_supply_get_by_name(pm860x_supplied_to[0]);
if (!psy)
return -EINVAL;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW,
&data);
if (ret) {
power_supply_put(psy);
return ret;
}
vbatt = data.intval / 1000;
ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data);
if (ret) {
power_supply_put(psy);
return ret;
}
power_supply_put(psy);
mutex_lock(&info->lock);
info->present = data.intval;
dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, "
"Allowed:%d\n",
&fsm_state[info->state][0],
(info->online) ? "online" : "N/A",
(info->present) ? "present" : "N/A", info->allowed);
dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt);
switch (info->state) {
case FSM_INIT:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
} else if (vbatt > DISCHARGE_THRESHOLD) {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
} else if (vbatt < DISCHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
if (vbatt < POWEROFF_THRESHOLD) {
power_off_notification(info);
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
}
break;
case FSM_PRECHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt > PRECHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
break;
case FSM_FASTCHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
}
} else {
info->state = FSM_DISCHARGE;
stop_charge(info, vbatt);
}
break;
case FSM_DISCHARGE:
if (info->online && info->present && info->allowed) {
if (vbatt < PRECHARGE_THRESHOLD) {
info->state = FSM_PRECHARGE;
start_precharge(info);
} else if (vbatt < DISCHARGE_THRESHOLD) {
info->state = FSM_FASTCHARGE;
start_fastcharge(info);
}
} else {
if (vbatt < POWEROFF_THRESHOLD)
power_off_notification(info);
else if (vbatt > CHARGE_THRESHOLD && info->online)
set_vbatt_threshold(info, CHARGE_THRESHOLD, 0);
}
break;
default:
dev_warn(info->dev, "FSM meets wrong state:%d\n",
info->state);
break;
}
dev_dbg(info->dev,
"Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n",
&fsm_state[info->state][0],
(info->online) ? "online" : "N/A",
(info->present) ? "present" : "N/A", info->allowed);
mutex_unlock(&info->lock);
return 0;
}
