diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.36/800-n516-lpc.patch')
-rw-r--r-- | target/linux/xburst/patches-2.6.36/800-n516-lpc.patch | 510 |
1 files changed, 510 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.36/800-n516-lpc.patch b/target/linux/xburst/patches-2.6.36/800-n516-lpc.patch new file mode 100644 index 000000000..052e5ba6e --- /dev/null +++ b/target/linux/xburst/patches-2.6.36/800-n516-lpc.patch @@ -0,0 +1,510 @@ +From b3c2e7322c09f0ce2f7ba89b7c6fceb6e00c2da0 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] 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 +@@ -390,6 +390,14 @@ config BMP085 + To compile this driver as a module, choose M here: the + module will be called bmp085. + ++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 +@@ -35,3 +35,4 @@ obj-y += eeprom/ + obj-y += cb710/ + obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o + obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.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"); |