Add 2.6.37 support

SVN-Revision: 24914

1 files changed, 510 insertions, 0 deletions

diff --git a/target/linux/xburst/patches-2.6.37/800-n516-lpc.patch b/target/linux/xburst/patches-2.6.37/800-n516-lpc.patch
new file mode 100644
index 0000000..9f908eb
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.37/800-n516-lpc.patch
@@ -0,0 +1,510 @@
+From 9d67bbbef07b0568d0541f79e3cd664d71d2d96c Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Wed, 12 May 2010 14:22:36 +0200
+Subject: [PATCH 4/5] Add n516 lpc driver
+
+---
+ drivers/misc/Kconfig    |    8 +
+ drivers/misc/Makefile   |    1 +
+ drivers/misc/n516-lpc.c |  471 +++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 480 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/misc/n516-lpc.c
+
+--- a/drivers/misc/Kconfig
++++ b/drivers/misc/Kconfig
+@@ -452,6 +452,14 @@ config PCH_PHUB
+ 	  To compile this driver as a module, choose M here: the module will
+ 	  be called pch_phub.
+ 
++config N516_LPC
++	tristate "N516 keys & power controller"
++	depends on I2C
++	depends on INPUT
++	depends on POWER_SUPPLY
++	help
++	  N516 keyboard & power controller driver
++
+ source "drivers/misc/c2port/Kconfig"
+ source "drivers/misc/eeprom/Kconfig"
+ source "drivers/misc/cb710/Kconfig"
+--- a/drivers/misc/Makefile
++++ b/drivers/misc/Makefile
+@@ -42,3 +42,4 @@ obj-$(CONFIG_ARM_CHARLCD)	+= arm-charlcd
+ obj-$(CONFIG_PCH_PHUB)		+= pch_phub.o
+ obj-y				+= ti-st/
+ obj-$(CONFIG_AB8500_PWM)	+= ab8500-pwm.o
++obj-$(CONFIG_N516_LPC)		+= n516-lpc.o
+--- /dev/null
++++ b/drivers/misc/n516-lpc.c
+@@ -0,0 +1,471 @@
++#include <linux/module.h>
++#include <linux/version.h>
++#include <linux/init.h>
++#include <linux/fs.h>
++#include <linux/interrupt.h>
++#include <linux/irq.h>
++#include <linux/sched.h>
++#include <linux/pm.h>
++#include <linux/sysctl.h>
++#include <linux/proc_fs.h>
++#include <linux/delay.h>
++#include <linux/platform_device.h>
++#include <linux/input.h>
++#include <linux/power_supply.h>
++#include <linux/suspend.h>
++
++#include <linux/i2c.h>
++
++#include <asm/mach-jz4740/irq.h>
++#include <asm/mach-jz4740/gpio.h>
++#include <asm/mach-jz4740/board-n516.h>
++
++static int batt_level=0;
++module_param(batt_level, int, 0);
++
++struct n516_lpc_chip {
++	struct i2c_client	*i2c_client;
++	struct input_dev	*input;
++	unsigned int		battery_level;
++	unsigned int		suspending:1, can_sleep:1;
++};
++
++static struct n516_lpc_chip *the_lpc;
++
++struct i2c_device_id n516_lpc_i2c_ids[] = {
++	{"LPC524", 0},
++	{},
++};
++
++MODULE_DEVICE_TABLE(i2c, n516_lpc_i2c_ids);
++
++static const unsigned short normal_i2c[] = I2C_ADDRS(0x54);
++
++static const unsigned int n516_lpc_keymap[] = {
++	[0x01] = KEY_4,
++	[0x02] = KEY_3,
++	[0x03] = KEY_2,
++	[0x04] = KEY_1,
++	[0x05] = KEY_0,
++	[0x07] = KEY_9,
++	[0x08] = KEY_8,
++	[0x09] = KEY_7,
++	[0x0a] = KEY_6,
++	[0x0b] = KEY_5,
++	[0x0d] = KEY_PLAYPAUSE,
++	[0x0e] = KEY_MENU,
++	[0x0f] = KEY_SEARCH,
++	[0x10] = KEY_DIRECTION,
++	[0x11] = KEY_SPACE,
++	[0x13] = KEY_ENTER,
++	[0x14] = KEY_UP,
++	[0x15] = KEY_DOWN,
++	[0x16] = KEY_RIGHT,
++	[0x17] = KEY_LEFT,
++	[0x19] = KEY_PAGEDOWN,
++	[0x1a] = KEY_PAGEUP,
++	[0x1c] = KEY_POWER,
++	[0x1d] = KEY_ESC,
++	[0x1e] = KEY_SLEEP,
++	[0x1f] = KEY_WAKEUP,
++};
++
++static const unsigned int batt_charge[] = {0, 7, 20, 45, 65, 80, 100};
++#define MAX_BAT_LEVEL	6
++
++static inline int n516_bat_charging(void)
++{
++	return !gpio_get_value(GPIO_CHARG_STAT_N);
++}
++
++static int n516_bat_get_status(struct power_supply *b)
++{
++	if (power_supply_am_i_supplied(b)) {
++		if (n516_bat_charging())
++			return POWER_SUPPLY_STATUS_CHARGING;
++		else
++			return POWER_SUPPLY_STATUS_FULL;
++	} else {
++		return POWER_SUPPLY_STATUS_DISCHARGING;
++	}
++}
++
++static int n516_bat_get_charge(struct power_supply *b)
++{
++	return batt_charge[the_lpc->battery_level];
++}
++
++static int n516_bat_get_property(struct power_supply *b,
++		enum power_supply_property psp,
++		union power_supply_propval *val)
++{
++	switch (psp) {
++	case POWER_SUPPLY_PROP_STATUS:
++		val->intval = n516_bat_get_status(b);
++		break;
++	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
++		val->intval = 100;
++		break;
++	case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
++		val->intval = 0;
++		break;
++	case POWER_SUPPLY_PROP_CHARGE_NOW:
++		val->intval = n516_bat_get_charge(b);
++		break;
++	default:
++		return -EINVAL;
++	}
++	return 0;
++}
++
++static void n516_bat_power_changed(struct power_supply *p)
++{
++	if (power_supply_am_i_supplied(p) && !n516_bat_charging())
++		the_lpc->battery_level = MAX_BAT_LEVEL;
++
++	power_supply_changed(p);
++}
++
++static enum power_supply_property n516_bat_properties[] = {
++	POWER_SUPPLY_PROP_STATUS,
++	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
++	POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
++	POWER_SUPPLY_PROP_CHARGE_NOW,
++};
++
++static struct power_supply n516_battery = {
++	.name		= "n516-battery",
++	.get_property	= n516_bat_get_property,
++	.properties	= n516_bat_properties,
++	.num_properties	= ARRAY_SIZE(n516_bat_properties),
++	.external_power_changed = n516_bat_power_changed,
++};
++
++static irqreturn_t n516_bat_charge_irq(int irq, void *dev)
++{
++	struct power_supply *psy = dev;
++
++	dev_dbg(psy->dev, "Battery charging IRQ\n");
++
++	if (power_supply_am_i_supplied(psy) && !n516_bat_charging())
++		the_lpc->battery_level = MAX_BAT_LEVEL;
++
++	power_supply_changed(psy);
++
++	return IRQ_HANDLED;
++}
++
++static int n516_lpc_send_message(struct n516_lpc_chip *chip, unsigned char val)
++{
++	struct i2c_client *client = chip->i2c_client;
++	struct i2c_msg msg = {client->addr, client->flags, 1, &val};
++	int ret = 0;
++
++	ret = i2c_transfer(client->adapter, &msg, 1);
++	return ret > 0 ? 0 : ret;
++}
++
++static void n516_key_event(struct n516_lpc_chip *chip, unsigned char keycode)
++{
++	struct i2c_client *client = chip->i2c_client;
++	bool long_press = false;
++
++	if (keycode & 0x40) {
++		keycode &= ~0x40;
++		long_press = true;
++	}
++
++	dev_dbg(&client->dev, "keycode: 0x%02x, long_press: 0x%02x\n", keycode, (unsigned int)long_press);
++
++	if (keycode >= ARRAY_SIZE(n516_lpc_keymap) || n516_lpc_keymap[keycode] == 0)
++		return;
++
++	if (long_press)
++		input_report_key(chip->input, KEY_LEFTALT, 1);
++
++	input_report_key(chip->input, n516_lpc_keymap[keycode], 1);
++	input_sync(chip->input);
++	input_report_key(chip->input, n516_lpc_keymap[keycode], 0);
++
++	if (long_press)
++		input_report_key(chip->input, KEY_LEFTALT, 0);
++	input_sync(chip->input);
++}
++
++static void n516_battery_event(struct n516_lpc_chip *chip, unsigned char battery_level)
++{
++	if (battery_level != chip->battery_level) {
++		chip->battery_level = battery_level;
++		power_supply_changed(&n516_battery);
++	}
++}
++
++static irqreturn_t n516_lpc_irq_thread(int irq, void *devid)
++{
++	struct n516_lpc_chip *chip = (struct n516_lpc_chip*)devid;
++	int ret;
++	unsigned char raw_msg;
++	struct i2c_client *client = chip->i2c_client;
++	struct i2c_msg msg = {client->addr, client->flags | I2C_M_RD, 1, &raw_msg};
++
++	if (client->dev.power.status >= DPM_OFF)
++		return IRQ_HANDLED;
++
++	ret = i2c_transfer(client->adapter, &msg, 1);
++	if (ret != 1) {
++		dev_dbg(&client->dev, "I2C error: %d\n", ret);
++		return IRQ_HANDLED;
++	}
++
++	dev_dbg(&client->dev, "msg: 0x%02x\n", raw_msg);
++
++	/* Ack wakeup event */
++	if ((raw_msg & ~0x40) < ARRAY_SIZE(n516_lpc_keymap))
++		n516_key_event(chip, raw_msg);
++	else if ((raw_msg >= 0x81) && (raw_msg <= 0x87))
++		n516_battery_event(chip, raw_msg - 0x81);
++	else if (raw_msg == 0x7e)
++		n516_lpc_send_message(chip, 0x00);
++	else
++		dev_warn(&client->dev, "Unknown message: %x\n", raw_msg);
++
++	if (chip->suspending)
++		chip->can_sleep = 0;
++
++	return IRQ_HANDLED;
++}
++
++static void n516_lpc_power_off(void)
++{
++	struct i2c_client *client = the_lpc->i2c_client;
++	unsigned char val = 0x01;
++	struct i2c_msg msg = {client->addr, client->flags, 1, &val};
++
++	printk("Issue LPC POWEROFF command...\n");
++	while (1)
++		i2c_transfer(client->adapter, &msg, 1);
++}
++
++static int n516_lpc_detect(struct i2c_client *client, struct i2c_board_info *info)
++{
++	return 0;
++}
++
++static int n516_lpc_suspend_notifier(struct notifier_block *nb,
++		                                unsigned long event,
++						void *dummy)
++{
++	switch(event) {
++	case PM_SUSPEND_PREPARE:
++		the_lpc->suspending = 1;
++		the_lpc->can_sleep = 1;
++		break;
++	case PM_POST_SUSPEND:
++		the_lpc->suspending = 0;
++		the_lpc->can_sleep = 1;
++		break;
++	default:
++		return NOTIFY_DONE;
++	}
++	return NOTIFY_OK;
++}
++
++static struct notifier_block n516_lpc_notif_block = {
++	.notifier_call = n516_lpc_suspend_notifier,
++};
++
++static int __devinit n516_lpc_probe(struct i2c_client *client, const struct i2c_device_id *id)
++{
++	struct n516_lpc_chip *chip;
++	struct input_dev *input;
++	int ret = 0;
++	int i;
++
++	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
++	if (!chip)
++		return -ENOMEM;
++
++	the_lpc = chip;
++	chip->i2c_client = client;
++	if ((batt_level > 0) && (batt_level < ARRAY_SIZE(batt_charge)))
++		chip->battery_level = batt_level;
++	else
++		chip->battery_level = 1;
++
++	i2c_set_clientdata(client, chip);
++
++	ret = gpio_request(GPIO_LPC_INT, "LPC interrupt request");
++	if (ret) {
++		dev_err(&client->dev, "Unable to reguest LPC INT GPIO\n");
++		goto err_gpio_req_lpcint;
++	}
++
++	ret = gpio_request(GPIO_CHARG_STAT_N, "LPC charging status");
++	if (ret) {
++		dev_err(&client->dev, "Unable to reguest CHARG STAT GPIO\n");
++		goto err_gpio_req_chargstat;
++	}
++
++	/* Enter normal mode */
++	n516_lpc_send_message(chip, 0x2);
++
++	input = input_allocate_device();
++	if (!input) {
++		dev_err(&client->dev, "Unable to allocate input device\n");
++		ret = -ENOMEM;
++		goto err_input_alloc;
++	}
++
++	chip->input = input;
++
++	__set_bit(EV_KEY, input->evbit);
++
++	for (i = 0; i < ARRAY_SIZE(n516_lpc_keymap); i++)
++		__set_bit(n516_lpc_keymap[i], input->keybit);
++
++	__set_bit(KEY_LEFTALT, input->keybit);
++
++	input->name = "n516-keys";
++	input->phys = "n516-keys/input0";
++	input->dev.parent = &client->dev;
++	input->id.bustype = BUS_I2C;
++	input->id.vendor = 0x0001;
++	input->id.product = 0x0001;
++	input->id.version = 0x0100;
++
++	ret = input_register_device(input);
++	if (ret < 0) {
++		dev_err(&client->dev, "Unable to register input device\n");
++		goto err_input_register;
++	}
++
++	ret = power_supply_register(NULL, &n516_battery);
++	if (ret) {
++		dev_err(&client->dev, "Unable to register N516 battery\n");
++		goto err_bat_reg;
++	}
++
++	ret = request_threaded_irq(gpio_to_irq(GPIO_LPC_INT), NULL,
++					n516_lpc_irq_thread,
++					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
++					"lpc", chip);
++	if (ret) {
++		dev_err(&client->dev, "request_irq failed: %d\n", ret);
++		goto err_request_lpc_irq;
++	}
++
++	ret = request_irq(gpio_to_irq(GPIO_CHARG_STAT_N), n516_bat_charge_irq,
++				IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
++				"battery charging", &n516_battery);
++	if (ret) {
++		dev_err(&client->dev, "Unable to claim battery charging IRQ\n");
++		goto err_request_chrg_irq;
++	}
++
++	pm_power_off = n516_lpc_power_off;
++	ret = register_pm_notifier(&n516_lpc_notif_block);
++	if (ret) {
++		dev_err(&client->dev, "Unable to register PM notify block\n");
++		goto err_reg_pm_notifier;
++	}
++
++	device_init_wakeup(&client->dev, 1);
++
++	return 0;
++
++	unregister_pm_notifier(&n516_lpc_notif_block);
++err_reg_pm_notifier:
++	free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
++err_request_chrg_irq:
++	free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
++err_request_lpc_irq:
++	power_supply_unregister(&n516_battery);
++err_bat_reg:
++	input_unregister_device(input);
++err_input_register:
++	input_free_device(input);
++err_input_alloc:
++	gpio_free(GPIO_CHARG_STAT_N);
++err_gpio_req_chargstat:
++	gpio_free(GPIO_LPC_INT);
++err_gpio_req_lpcint:
++	i2c_set_clientdata(client, NULL);
++	kfree(chip);
++
++	return ret;
++}
++
++static int __devexit n516_lpc_remove(struct i2c_client *client)
++{
++	struct n516_lpc_chip *chip = i2c_get_clientdata(client);
++
++	unregister_pm_notifier(&n516_lpc_notif_block);
++	pm_power_off = NULL;
++	free_irq(gpio_to_irq(GPIO_CHARG_STAT_N), &n516_battery);
++	free_irq(gpio_to_irq(GPIO_LPC_INT), chip);
++	power_supply_unregister(&n516_battery);
++	input_unregister_device(chip->input);
++	gpio_free(GPIO_CHARG_STAT_N);
++	gpio_free(GPIO_LPC_INT);
++	i2c_set_clientdata(client, NULL);
++	kfree(chip);
++
++	return 0;
++}
++
++#if CONFIG_PM
++static int n516_lpc_suspend(struct i2c_client *client, pm_message_t msg)
++{
++	if (!the_lpc->can_sleep)
++		return -EBUSY;
++
++	if (device_may_wakeup(&client->dev))
++		enable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
++
++	return 0;
++}
++
++static int n516_lpc_resume(struct i2c_client *client)
++{
++	if (device_may_wakeup(&client->dev))
++		disable_irq_wake(gpio_to_irq(GPIO_LPC_INT));
++
++	return 0;
++}
++#else
++#define n516_lpc_suspend NULL
++#define n516_lpc_resume NULL
++#endif
++
++
++static struct i2c_driver n516_lpc_driver = {
++	.class		= I2C_CLASS_HWMON,
++	.driver		= {
++		.name	= "n516-keys",
++		.owner	= THIS_MODULE,
++	},
++	.probe		= n516_lpc_probe,
++	.remove		= __devexit_p(n516_lpc_remove),
++	.detect		= n516_lpc_detect,
++	.id_table	= n516_lpc_i2c_ids,
++	.address_list	= normal_i2c,
++	.suspend	= n516_lpc_suspend,
++	.resume		= n516_lpc_resume,
++};
++
++static int __init n516_lpc_init(void)
++{
++	return i2c_add_driver(&n516_lpc_driver);
++}
++module_init(n516_lpc_init);
++
++static void __exit n516_lpc_exit(void)
++{
++	i2c_del_driver(&n516_lpc_driver);
++}
++module_exit(n516_lpc_exit);
++
++MODULE_AUTHOR("Yauhen Kharuzhy");
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("Keys and power controller driver for N516");
++MODULE_ALIAS("platform:n516-keys");