diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/apds9802als.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/apds9802als.c | 339 |
1 files changed, 0 insertions, 339 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/apds9802als.c b/ANDROID_3.4.5/drivers/misc/apds9802als.c deleted file mode 100644 index 0314773f..00000000 --- a/ANDROID_3.4.5/drivers/misc/apds9802als.c +++ /dev/null @@ -1,339 +0,0 @@ -/* - * apds9802als.c - apds9802 ALS Driver - * - * Copyright (C) 2009 Intel Corp - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * 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; version 2 of the License. - * - * 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/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/err.h> -#include <linux/delay.h> -#include <linux/mutex.h> -#include <linux/sysfs.h> -#include <linux/pm_runtime.h> - -#define ALS_MIN_RANGE_VAL 1 -#define ALS_MAX_RANGE_VAL 2 -#define POWER_STA_ENABLE 1 -#define POWER_STA_DISABLE 0 - -#define DRIVER_NAME "apds9802als" - -struct als_data { - struct mutex mutex; -}; - -static ssize_t als_sensing_range_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - int val; - - val = i2c_smbus_read_byte_data(client, 0x81); - if (val < 0) - return val; - if (val & 1) - return sprintf(buf, "4095\n"); - else - return sprintf(buf, "65535\n"); -} - -static int als_wait_for_data_ready(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - int ret; - int retry = 10; - - do { - msleep(30); - ret = i2c_smbus_read_byte_data(client, 0x86); - } while (!(ret & 0x80) && retry--); - - if (!retry) { - dev_warn(dev, "timeout waiting for data ready\n"); - return -ETIMEDOUT; - } - - return 0; -} - -static ssize_t als_lux0_input_data_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - struct als_data *data = i2c_get_clientdata(client); - int ret_val; - int temp; - - /* Protect against parallel reads */ - pm_runtime_get_sync(dev); - mutex_lock(&data->mutex); - - /* clear EOC interrupt status */ - i2c_smbus_write_byte(client, 0x40); - /* start measurement */ - temp = i2c_smbus_read_byte_data(client, 0x81); - i2c_smbus_write_byte_data(client, 0x81, temp | 0x08); - - ret_val = als_wait_for_data_ready(dev); - if (ret_val < 0) - goto failed; - - temp = i2c_smbus_read_byte_data(client, 0x8C); /* LSB data */ - if (temp < 0) { - ret_val = temp; - goto failed; - } - ret_val = i2c_smbus_read_byte_data(client, 0x8D); /* MSB data */ - if (ret_val < 0) - goto failed; - - mutex_unlock(&data->mutex); - pm_runtime_put_sync(dev); - - temp = (ret_val << 8) | temp; - return sprintf(buf, "%d\n", temp); -failed: - mutex_unlock(&data->mutex); - pm_runtime_put_sync(dev); - return ret_val; -} - -static ssize_t als_sensing_range_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - struct als_data *data = i2c_get_clientdata(client); - int ret_val; - unsigned long val; - - if (strict_strtoul(buf, 10, &val)) - return -EINVAL; - - if (val < 4096) - val = 1; - else if (val < 65536) - val = 2; - else - return -ERANGE; - - pm_runtime_get_sync(dev); - - /* Make sure nobody else reads/modifies/writes 0x81 while we - are active */ - mutex_lock(&data->mutex); - - ret_val = i2c_smbus_read_byte_data(client, 0x81); - if (ret_val < 0) - goto fail; - - /* Reset the bits before setting them */ - ret_val = ret_val & 0xFA; - - if (val == 1) /* Setting detection range up to 4k LUX */ - ret_val = (ret_val | 0x01); - else /* Setting detection range up to 64k LUX*/ - ret_val = (ret_val | 0x00); - - ret_val = i2c_smbus_write_byte_data(client, 0x81, ret_val); - - if (ret_val >= 0) { - /* All OK */ - mutex_unlock(&data->mutex); - pm_runtime_put_sync(dev); - return count; - } -fail: - mutex_unlock(&data->mutex); - pm_runtime_put_sync(dev); - return ret_val; -} - -static int als_set_power_state(struct i2c_client *client, bool on_off) -{ - int ret_val; - struct als_data *data = i2c_get_clientdata(client); - - mutex_lock(&data->mutex); - ret_val = i2c_smbus_read_byte_data(client, 0x80); - if (ret_val < 0) - goto fail; - if (on_off) - ret_val = ret_val | 0x01; - else - ret_val = ret_val & 0xFE; - ret_val = i2c_smbus_write_byte_data(client, 0x80, ret_val); -fail: - mutex_unlock(&data->mutex); - return ret_val; -} - -static DEVICE_ATTR(lux0_sensor_range, S_IRUGO | S_IWUSR, - als_sensing_range_show, als_sensing_range_store); -static DEVICE_ATTR(lux0_input, S_IRUGO, als_lux0_input_data_show, NULL); - -static struct attribute *mid_att_als[] = { - &dev_attr_lux0_sensor_range.attr, - &dev_attr_lux0_input.attr, - NULL -}; - -static struct attribute_group m_als_gr = { - .name = "apds9802als", - .attrs = mid_att_als -}; - -static int als_set_default_config(struct i2c_client *client) -{ - int ret_val; - /* Write the command and then switch on */ - ret_val = i2c_smbus_write_byte_data(client, 0x80, 0x01); - if (ret_val < 0) { - dev_err(&client->dev, "failed default switch on write\n"); - return ret_val; - } - /* detection range: 1~64K Lux, maunal measurement */ - ret_val = i2c_smbus_write_byte_data(client, 0x81, 0x08); - if (ret_val < 0) - dev_err(&client->dev, "failed default LUX on write\n"); - - /* We always get 0 for the 1st measurement after system power on, - * so make sure it is finished before user asks for data. - */ - als_wait_for_data_ready(&client->dev); - - return ret_val; -} - -static int apds9802als_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int res; - struct als_data *data; - - data = kzalloc(sizeof(struct als_data), GFP_KERNEL); - if (data == NULL) { - dev_err(&client->dev, "Memory allocation failed\n"); - return -ENOMEM; - } - i2c_set_clientdata(client, data); - res = sysfs_create_group(&client->dev.kobj, &m_als_gr); - if (res) { - dev_err(&client->dev, "device create file failed\n"); - goto als_error1; - } - dev_info(&client->dev, "ALS chip found\n"); - als_set_default_config(client); - mutex_init(&data->mutex); - - pm_runtime_set_active(&client->dev); - pm_runtime_enable(&client->dev); - - return res; -als_error1: - kfree(data); - return res; -} - -static int __devexit apds9802als_remove(struct i2c_client *client) -{ - struct als_data *data = i2c_get_clientdata(client); - - pm_runtime_get_sync(&client->dev); - - als_set_power_state(client, false); - sysfs_remove_group(&client->dev.kobj, &m_als_gr); - - pm_runtime_disable(&client->dev); - pm_runtime_set_suspended(&client->dev); - pm_runtime_put_noidle(&client->dev); - - kfree(data); - return 0; -} - -#ifdef CONFIG_PM -static int apds9802als_suspend(struct i2c_client *client, pm_message_t mesg) -{ - als_set_power_state(client, false); - return 0; -} - -static int apds9802als_resume(struct i2c_client *client) -{ - als_set_default_config(client); - return 0; -} - -static int apds9802als_runtime_suspend(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - - als_set_power_state(client, false); - return 0; -} - -static int apds9802als_runtime_resume(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - - als_set_power_state(client, true); - return 0; -} - -static const struct dev_pm_ops apds9802als_pm_ops = { - .runtime_suspend = apds9802als_runtime_suspend, - .runtime_resume = apds9802als_runtime_resume, -}; - -#define APDS9802ALS_PM_OPS (&apds9802als_pm_ops) - -#else /* CONFIG_PM */ -#define apds9802als_suspend NULL -#define apds9802als_resume NULL -#define APDS9802ALS_PM_OPS NULL -#endif /* CONFIG_PM */ - -static struct i2c_device_id apds9802als_id[] = { - { DRIVER_NAME, 0 }, - { } -}; - -MODULE_DEVICE_TABLE(i2c, apds9802als_id); - -static struct i2c_driver apds9802als_driver = { - .driver = { - .name = DRIVER_NAME, - .pm = APDS9802ALS_PM_OPS, - }, - .probe = apds9802als_probe, - .remove = __devexit_p(apds9802als_remove), - .suspend = apds9802als_suspend, - .resume = apds9802als_resume, - .id_table = apds9802als_id, -}; - -module_i2c_driver(apds9802als_driver); - -MODULE_AUTHOR("Anantha Narayanan <Anantha.Narayanan@intel.com"); -MODULE_DESCRIPTION("Avago apds9802als ALS Driver"); -MODULE_LICENSE("GPL v2"); |