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path: root/net/ipv4/ip_tunnel_core.c

Age	Commit message (Expand)	Author
2014-10-17	ipv4: fix a potential use after free in ip_tunnel_core.c	Li RongQing
2014-06-04	net: Support for multiple checksums with gso	Tom Herbert
2014-06-02	inetpeer: get rid of ip_id_count	Eric Dumazet
2014-04-15	ipv4: add a sock pointer to dst->output() path.	Eric Dumazet
2014-03-29	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	David S. Miller
2014-03-26	ip_tunnel: Fix dst ref-count.	Pravin B Shelar
2014-03-14	net: Replace u64_stats_fetch_begin_bh to u64_stats_fetch_begin_irq	Eric W. Biederman
2014-03-03	ip_tunnel:multicast process cause panic due to skb->_skb_refdst NULL pointer	Xin Long
2014-02-20	ip_tunnel: Move ip_tunnel_get_stats64 into ip_tunnel_core.c	David S. Miller
2013-12-17	net: Add utility functions to clear rxhash	Tom Herbert
2013-10-19	ipv4: generalize gre_handle_offloads	Eric Dumazet
2013-10-01	ip_tunnel_core: Change __skb_push back to skb_push	Steffen Klassert
2013-09-04	tunnels: harmonize cleanup done on skb on xmit path	Nicolas Dichtel
2013-09-04	iptunnels: remove net arg from iptunnel_xmit()	Nicolas Dichtel
2013-08-13	ip_tunnel: Do not use inner ip-header-id for tunnel ip-header-id.	Pravin B Shelar
2013-06-19	ip_tunnel: push generic protocol handling to ip_tunnel module.	Pravin B Shelar
2013-06-19	ip_tunnels: extend iptunnel_xmit()	Pravin B Shelar

generated by cgit v1.2.3 (git 2.25.1) at 2024-08-23 01:51:39 +0000

/*
 * max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver
 *
 * Copyright (C) 2011 Samsung Electronics
 * MyungJoo Ham <myungjoo.ham@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/power_supply.h>
#include <linux/platform_device.h>
#include <linux/power/max8903_charger.h>

struct max8903_data {
	struct max8903_pdata *pdata;
	struct device *dev;
	struct power_supply *psy;
	struct power_supply_desc psy_desc;
	bool fault;
	bool usb_in;
	bool ta_in;
};

static enum power_supply_property max8903_charger_props[] = {
	POWER_SUPPLY_PROP_STATUS, /* Charger status output */
	POWER_SUPPLY_PROP_ONLINE, /* External power source */
	POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */
};

static int max8903_get_property(struct power_supply *psy,
		enum power_supply_property psp,
		union power_supply_propval *val)
{
	struct max8903_data *data = power_supply_get_drvdata(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
		if (gpio_is_valid(data->pdata->chg)) {
			if (gpio_get_value(data->pdata->chg) == 0)
				val->intval = POWER_SUPPLY_STATUS_CHARGING;
			else if (data->usb_in || data->ta_in)
				val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
			else
				val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
		}
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = 0;
		if (data->usb_in || data->ta_in)
			val->intval = 1;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		val->intval = POWER_SUPPLY_HEALTH_GOOD;
		if (data->fault)
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static irqreturn_t max8903_dcin(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = data->pdata;
	bool ta_in;
	enum power_supply_type old_type;

	ta_in = gpio_get_value(pdata->dok) ? false : true;

	if (ta_in == data->ta_in)
		return IRQ_HANDLED;

	data->ta_in = ta_in;

	/* Set Current-Limit-Mode 1:DC 0:USB */
	if (gpio_is_valid(pdata->dcm))
		gpio_set_value(pdata->dcm, ta_in ? 1 : 0);

	/* Charger Enable / Disable (cen is negated) */
	if (gpio_is_valid(pdata->cen))
		gpio_set_value(pdata->cen, ta_in ? 0 :
				(data->usb_in ? 0 : 1));

	dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ?
			"Connected" : "Disconnected");

	old_type = data->psy_desc.type;

	if (data->ta_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
	else if (data->usb_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
	else
		data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;

	if (old_type != data->psy_desc.type)
		power_supply_changed(data->psy);

	return IRQ_HANDLED;
}

static irqreturn_t max8903_usbin(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = data->pdata;
	bool usb_in;
	enum power_supply_type old_type;

	usb_in = gpio_get_value(pdata->uok) ? false : true;

	if (usb_in == data->usb_in)
		return IRQ_HANDLED;

	data->usb_in = usb_in;

	/* Do not touch Current-Limit-Mode */

	/* Charger Enable / Disable (cen is negated) */
	if (gpio_is_valid(pdata->cen))
		gpio_set_value(pdata->cen, usb_in ? 0 :
				(data->ta_in ? 0 : 1));

	dev_dbg(data->dev, "USB Charger %s.\n", usb_in ?
			"Connected" : "Disconnected");

	old_type = data->psy_desc.type;

	if (data->ta_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_MAINS;
	else if (data->usb_in)
		data->psy_desc.type = POWER_SUPPLY_TYPE_USB;
	else
		data->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;

	if (old_type != data->psy_desc.type)
		power_supply_changed(data->psy);

	return IRQ_HANDLED;
}

static irqreturn_t max8903_fault(int irq, void *_data)
{
	struct max8903_data *data = _data;
	struct max8903_pdata *pdata = data->pdata;
	bool fault;

	fault = gpio_get_value(pdata->flt) ? false : true;

	if (fault == data->fault)
		return IRQ_HANDLED;

	data->fault = fault;

	if (fault)
		dev_err(data->dev, "Charger suffers a fault and stops.\n");
	else
		dev_err(data->dev, "Charger recovered from a fault.\n");

	return IRQ_HANDLED;
}

static struct max8903_pdata *max8903_parse_dt_data(struct device *dev)
{
	struct device_node *np = dev->of_node;
	struct max8903_pdata *pdata = NULL;

	if (!np)
		return NULL;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return NULL;

	pdata->dc_valid = false;
	pdata->usb_valid = false;

	pdata->cen = of_get_named_gpio(np, "cen-gpios", 0);
	if (!gpio_is_valid(pdata->cen))
		pdata->cen = -EINVAL;

	pdata->chg = of_get_named_gpio(np, "chg-gpios", 0);
	if (!gpio_is_valid(pdata->chg))
		pdata->chg = -EINVAL;

	pdata->flt = of_get_named_gpio(np, "flt-gpios", 0);
	if (!gpio_is_valid(pdata->flt))
		pdata->flt = -EINVAL;

	pdata->usus = of_get_named_gpio(np, "usus-gpios", 0);
	if (!gpio_is_valid(pdata->usus))
		pdata->usus = -EINVAL;

	pdata->dcm = of_get_named_gpio(np, "dcm-gpios", 0);
	if (!gpio_is_valid(pdata->dcm))
		pdata->dcm = -EINVAL;

	pdata->dok = of_get_named_gpio(np, "dok-gpios", 0);
	if (!gpio_is_valid(pdata->dok))
		pdata->dok = -EINVAL;
	else
		pdata->dc_valid = true;

	pdata->uok = of_get_named_gpio(np, "uok-gpios", 0);
	if (!gpio_is_valid(pdata->uok))
		pdata->uok = -EINVAL;
	else
		pdata->usb_valid = true;

	return pdata;
}

static int max8903_setup_gpios(struct platform_device *pdev)
{
	struct max8903_data *data = platform_get_drvdata(pdev);
	struct device *dev = &pdev->dev;
	struct max8903_pdata *pdata = pdev<