diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/isl29003.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/isl29003.c | 463 |
1 files changed, 0 insertions, 463 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/isl29003.c b/ANDROID_3.4.5/drivers/misc/isl29003.c deleted file mode 100644 index eb5de2e2..00000000 --- a/ANDROID_3.4.5/drivers/misc/isl29003.c +++ /dev/null @@ -1,463 +0,0 @@ -/* - * isl29003.c - Linux kernel module for - * Intersil ISL29003 ambient light sensor - * - * See file:Documentation/misc-devices/isl29003 - * - * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> - * - * Based on code written by - * Rodolfo Giometti <giometti@linux.it> - * Eurotech S.p.A. <info@eurotech.it> - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/mutex.h> -#include <linux/delay.h> - -#define ISL29003_DRV_NAME "isl29003" -#define DRIVER_VERSION "1.0" - -#define ISL29003_REG_COMMAND 0x00 -#define ISL29003_ADC_ENABLED (1 << 7) -#define ISL29003_ADC_PD (1 << 6) -#define ISL29003_TIMING_INT (1 << 5) -#define ISL29003_MODE_SHIFT (2) -#define ISL29003_MODE_MASK (0x3 << ISL29003_MODE_SHIFT) -#define ISL29003_RES_SHIFT (0) -#define ISL29003_RES_MASK (0x3 << ISL29003_RES_SHIFT) - -#define ISL29003_REG_CONTROL 0x01 -#define ISL29003_INT_FLG (1 << 5) -#define ISL29003_RANGE_SHIFT (2) -#define ISL29003_RANGE_MASK (0x3 << ISL29003_RANGE_SHIFT) -#define ISL29003_INT_PERSISTS_SHIFT (0) -#define ISL29003_INT_PERSISTS_MASK (0xf << ISL29003_INT_PERSISTS_SHIFT) - -#define ISL29003_REG_IRQ_THRESH_HI 0x02 -#define ISL29003_REG_IRQ_THRESH_LO 0x03 -#define ISL29003_REG_LSB_SENSOR 0x04 -#define ISL29003_REG_MSB_SENSOR 0x05 -#define ISL29003_REG_LSB_TIMER 0x06 -#define ISL29003_REG_MSB_TIMER 0x07 - -#define ISL29003_NUM_CACHABLE_REGS 4 - -struct isl29003_data { - struct i2c_client *client; - struct mutex lock; - u8 reg_cache[ISL29003_NUM_CACHABLE_REGS]; - u8 power_state_before_suspend; -}; - -static int gain_range[] = { - 1000, 4000, 16000, 64000 -}; - -/* - * register access helpers - */ - -static int __isl29003_read_reg(struct i2c_client *client, - u32 reg, u8 mask, u8 shift) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - return (data->reg_cache[reg] & mask) >> shift; -} - -static int __isl29003_write_reg(struct i2c_client *client, - u32 reg, u8 mask, u8 shift, u8 val) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - int ret = 0; - u8 tmp; - - if (reg >= ISL29003_NUM_CACHABLE_REGS) - return -EINVAL; - - mutex_lock(&data->lock); - - tmp = data->reg_cache[reg]; - tmp &= ~mask; - tmp |= val << shift; - - ret = i2c_smbus_write_byte_data(client, reg, tmp); - if (!ret) - data->reg_cache[reg] = tmp; - - mutex_unlock(&data->lock); - return ret; -} - -/* - * internally used functions - */ - -/* range */ -static int isl29003_get_range(struct i2c_client *client) -{ - return __isl29003_read_reg(client, ISL29003_REG_CONTROL, - ISL29003_RANGE_MASK, ISL29003_RANGE_SHIFT); -} - -static int isl29003_set_range(struct i2c_client *client, int range) -{ - return __isl29003_write_reg(client, ISL29003_REG_CONTROL, - ISL29003_RANGE_MASK, ISL29003_RANGE_SHIFT, range); -} - -/* resolution */ -static int isl29003_get_resolution(struct i2c_client *client) -{ - return __isl29003_read_reg(client, ISL29003_REG_COMMAND, - ISL29003_RES_MASK, ISL29003_RES_SHIFT); -} - -static int isl29003_set_resolution(struct i2c_client *client, int res) -{ - return __isl29003_write_reg(client, ISL29003_REG_COMMAND, - ISL29003_RES_MASK, ISL29003_RES_SHIFT, res); -} - -/* mode */ -static int isl29003_get_mode(struct i2c_client *client) -{ - return __isl29003_read_reg(client, ISL29003_REG_COMMAND, - ISL29003_RES_MASK, ISL29003_RES_SHIFT); -} - -static int isl29003_set_mode(struct i2c_client *client, int mode) -{ - return __isl29003_write_reg(client, ISL29003_REG_COMMAND, - ISL29003_RES_MASK, ISL29003_RES_SHIFT, mode); -} - -/* power_state */ -static int isl29003_set_power_state(struct i2c_client *client, int state) -{ - return __isl29003_write_reg(client, ISL29003_REG_COMMAND, - ISL29003_ADC_ENABLED | ISL29003_ADC_PD, 0, - state ? ISL29003_ADC_ENABLED : ISL29003_ADC_PD); -} - -static int isl29003_get_power_state(struct i2c_client *client) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - u8 cmdreg = data->reg_cache[ISL29003_REG_COMMAND]; - return ~cmdreg & ISL29003_ADC_PD; -} - -static int isl29003_get_adc_value(struct i2c_client *client) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - int lsb, msb, range, bitdepth; - - mutex_lock(&data->lock); - lsb = i2c_smbus_read_byte_data(client, ISL29003_REG_LSB_SENSOR); - - if (lsb < 0) { - mutex_unlock(&data->lock); - return lsb; - } - - msb = i2c_smbus_read_byte_data(client, ISL29003_REG_MSB_SENSOR); - mutex_unlock(&data->lock); - - if (msb < 0) - return msb; - - range = isl29003_get_range(client); - bitdepth = (4 - isl29003_get_resolution(client)) * 4; - return (((msb << 8) | lsb) * gain_range[range]) >> bitdepth; -} - -/* - * sysfs layer - */ - -/* range */ -static ssize_t isl29003_show_range(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%i\n", isl29003_get_range(client)); -} - -static ssize_t isl29003_store_range(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned long val; - int ret; - - if ((strict_strtoul(buf, 10, &val) < 0) || (val > 3)) - return -EINVAL; - - ret = isl29003_set_range(client, val); - if (ret < 0) - return ret; - - return count; -} - -static DEVICE_ATTR(range, S_IWUSR | S_IRUGO, - isl29003_show_range, isl29003_store_range); - - -/* resolution */ -static ssize_t isl29003_show_resolution(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%d\n", isl29003_get_resolution(client)); -} - -static ssize_t isl29003_store_resolution(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned long val; - int ret; - - if ((strict_strtoul(buf, 10, &val) < 0) || (val > 3)) - return -EINVAL; - - ret = isl29003_set_resolution(client, val); - if (ret < 0) - return ret; - - return count; -} - -static DEVICE_ATTR(resolution, S_IWUSR | S_IRUGO, - isl29003_show_resolution, isl29003_store_resolution); - -/* mode */ -static ssize_t isl29003_show_mode(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%d\n", isl29003_get_mode(client)); -} - -static ssize_t isl29003_store_mode(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned long val; - int ret; - - if ((strict_strtoul(buf, 10, &val) < 0) || (val > 2)) - return -EINVAL; - - ret = isl29003_set_mode(client, val); - if (ret < 0) - return ret; - - return count; -} - -static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, - isl29003_show_mode, isl29003_store_mode); - - -/* power state */ -static ssize_t isl29003_show_power_state(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%d\n", isl29003_get_power_state(client)); -} - -static ssize_t isl29003_store_power_state(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned long val; - int ret; - - if ((strict_strtoul(buf, 10, &val) < 0) || (val > 1)) - return -EINVAL; - - ret = isl29003_set_power_state(client, val); - return ret ? ret : count; -} - -static DEVICE_ATTR(power_state, S_IWUSR | S_IRUGO, - isl29003_show_power_state, isl29003_store_power_state); - - -/* lux */ -static ssize_t isl29003_show_lux(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - - /* No LUX data if not operational */ - if (!isl29003_get_power_state(client)) - return -EBUSY; - - return sprintf(buf, "%d\n", isl29003_get_adc_value(client)); -} - -static DEVICE_ATTR(lux, S_IRUGO, isl29003_show_lux, NULL); - -static struct attribute *isl29003_attributes[] = { - &dev_attr_range.attr, - &dev_attr_resolution.attr, - &dev_attr_mode.attr, - &dev_attr_power_state.attr, - &dev_attr_lux.attr, - NULL -}; - -static const struct attribute_group isl29003_attr_group = { - .attrs = isl29003_attributes, -}; - -static int isl29003_init_client(struct i2c_client *client) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - int i; - - /* read all the registers once to fill the cache. - * if one of the reads fails, we consider the init failed */ - for (i = 0; i < ARRAY_SIZE(data->reg_cache); i++) { - int v = i2c_smbus_read_byte_data(client, i); - if (v < 0) - return -ENODEV; - - data->reg_cache[i] = v; - } - - /* set defaults */ - isl29003_set_range(client, 0); - isl29003_set_resolution(client, 0); - isl29003_set_mode(client, 0); - isl29003_set_power_state(client, 0); - - return 0; -} - -/* - * I2C layer - */ - -static int __devinit isl29003_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); - struct isl29003_data *data; - int err = 0; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) - return -EIO; - - data = kzalloc(sizeof(struct isl29003_data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - data->client = client; - i2c_set_clientdata(client, data); - mutex_init(&data->lock); - - /* initialize the ISL29003 chip */ - err = isl29003_init_client(client); - if (err) - goto exit_kfree; - - /* register sysfs hooks */ - err = sysfs_create_group(&client->dev.kobj, &isl29003_attr_group); - if (err) - goto exit_kfree; - - dev_info(&client->dev, "driver version %s enabled\n", DRIVER_VERSION); - return 0; - -exit_kfree: - kfree(data); - return err; -} - -static int __devexit isl29003_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &isl29003_attr_group); - isl29003_set_power_state(client, 0); - kfree(i2c_get_clientdata(client)); - return 0; -} - -#ifdef CONFIG_PM -static int isl29003_suspend(struct i2c_client *client, pm_message_t mesg) -{ - struct isl29003_data *data = i2c_get_clientdata(client); - - data->power_state_before_suspend = isl29003_get_power_state(client); - return isl29003_set_power_state(client, 0); -} - -static int isl29003_resume(struct i2c_client *client) -{ - int i; - struct isl29003_data *data = i2c_get_clientdata(client); - - /* restore registers from cache */ - for (i = 0; i < ARRAY_SIZE(data->reg_cache); i++) - if (i2c_smbus_write_byte_data(client, i, data->reg_cache[i])) - return -EIO; - - return isl29003_set_power_state(client, - data->power_state_before_suspend); -} - -#else -#define isl29003_suspend NULL -#define isl29003_resume NULL -#endif /* CONFIG_PM */ - -static const struct i2c_device_id isl29003_id[] = { - { "isl29003", 0 }, - {} -}; -MODULE_DEVICE_TABLE(i2c, isl29003_id); - -static struct i2c_driver isl29003_driver = { - .driver = { - .name = ISL29003_DRV_NAME, - .owner = THIS_MODULE, - }, - .suspend = isl29003_suspend, - .resume = isl29003_resume, - .probe = isl29003_probe, - .remove = __devexit_p(isl29003_remove), - .id_table = isl29003_id, -}; - -module_i2c_driver(isl29003_driver); - -MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>"); -MODULE_DESCRIPTION("ISL29003 ambient light sensor driver"); -MODULE_LICENSE("GPL v2"); -MODULE_VERSION(DRIVER_VERSION); |