Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756555AbZFZIjS (ORCPT ); Fri, 26 Jun 2009 04:39:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752456AbZFZIjG (ORCPT ); Fri, 26 Jun 2009 04:39:06 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:60610 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751555AbZFZIjD (ORCPT ); Fri, 26 Jun 2009 04:39:03 -0400 Date: Fri, 26 Jun 2009 17:39:02 +0900 From: Minkyu Kang Subject: [PATCH] hwmon: add GP2A002 proximity/ambient sensor To: linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, lm-sensors@lm-sensors.org Cc: suchang.woo@samsung.com, kyungmin.park@samsung.com Message-id: <4A448926.1030701@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Content-transfer-encoding: 7BIT User-Agent: Thunderbird 2.0.0.17 (Windows/20080914) X-OriginalArrivalTime: 26 Jun 2009 08:39:04.0198 (UTC) FILETIME=[8FBEBA60:01C9F639] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 13956 Lines: 555 The GP2A002 is a I2C interfaced Sensor for Proximity/Ambient This patch adds support the GP2A002 sensor Signed-off-by: Minkyu Kang Signed-off-by: Suchang Woo --- drivers/hwmon/Kconfig | 7 + drivers/hwmon/Makefile | 1 + drivers/hwmon/gp2ap002.c | 471 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/gp2ap002.h | 21 ++ 4 files changed, 500 insertions(+), 0 deletions(-) create mode 100644 drivers/hwmon/gp2ap002.c create mode 100644 include/linux/gp2ap002.h diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 2d50166..cc4e200 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1017,6 +1017,13 @@ config SENSORS_APPLESMC Say Y here if you have an applicable laptop and want to experience the awesome power of applesmc. +config SENSORS_GP2AP002 + tristate "GP2AP002 series Proximity/Ambient Sensor" + depends on HWMON && I2C + help + This driver provides support for Proximity/Ambient Sensor. + + config HWMON_DEBUG_CHIP bool "Hardware Monitoring Chip debugging messages" default n diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b793dce..5dd1671 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_FSCPOS) += fscpos.o obj-$(CONFIG_SENSORS_G760A) += g760a.o obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o +obj-$(CONFIG_SENSORS_GP2AP002) += gp2ap002.o obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o diff --git a/drivers/hwmon/gp2ap002.c b/drivers/hwmon/gp2ap002.c new file mode 100644 index 0000000..6861584 --- /dev/null +++ b/drivers/hwmon/gp2ap002.c @@ -0,0 +1,471 @@ +/* + * gp2ap002.c - Proximity/Ambient light sensor + * + * Copyright (C) 2009 Samsung Electronics + * Minkyu Kang + * Suchang Woo + * Kyungmin Park + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GP2AP002_PROX 0x00 /* Read Only */ +#define GP2AP002_GAIN 0x01 +#define GP2AP002_HYS 0x02 +#define GP2AP002_CYCLE 0x03 +#define GP2AP002_OPMOD 0x04 +#define GP2AP002_CON 0x06 + +#define PROX_VO_NO_DETECT (0 << 0) +#define PROX_VO_DETECT (1 << 0) + +#define GAIN_LED0_SMALL (0 << 3) +#define GAIN_LED0_LARGE (1 << 3) + +#define HYS_HYSD (1 << 7) +#define HYS_HYSC1 (1 << 6) +#define HYS_HYSC0 (1 << 5) +#define HYS_HYSF3 (1 << 3) +#define HYS_HYSF2 (1 << 2) +#define HYS_HYSF1 (1 << 1) +#define HYS_HYSF0 (1 << 0) + +#define OPMOD_SSD_SHUTDOWN (0 << 0) +#define OPMOD_SSD_OPERATING (1 << 0) +#define OPMOD_VCON_NORMAL (0 << 1) +#define OPMOD_VCON_IRQ (1 << 1) + +#define CON_OCON1 (1 << 4) +#define CON_OCON0 (1 << 3) + +#define GP2AP002_MAX_LUX 10 + +static int lux_table[GP2AP002_MAX_LUX] = { + 1, 165, 288, 497, 869, 1532, 2692, 4692, 8280, 100000, +}; + +struct gp2ap002_chip { + struct i2c_client *client; + struct device *dev; + struct input_dev *idev; + struct work_struct work; + struct mutex lock; + + void (*power_enable)(int onoff); + int (*get_adc)(void); + int vo_gpio; + + /* Proximity */ + int enable; + int mode; + int vo; + /* Ambient Light */ + int adc; + int level; +}; + +static int gp2ap002_write_reg(struct i2c_client *client, int reg, u8 value) +{ + int ret; + + ret = i2c_smbus_write_byte_data(client, reg, value); + + if (ret < 0) + dev_err(&client->dev, "%s: err %d\n", __func__, ret); + + return ret; +} + +static int gp2ap002_read_reg(struct i2c_client *client, int reg) +{ + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) + dev_err(&client->dev, "%s: err %d\n", __func__, ret); + + return ret; +} + +static void gp2ap002_get_vo(struct gp2ap002_chip *chip) +{ + if (chip->mode == OPMOD_VCON_IRQ) { + chip->vo = gp2ap002_read_reg(chip->client, + GP2AP002_PROX) & PROX_VO_DETECT; + } else { + chip->vo = !gpio_get_value(chip->vo_gpio); + } +} + +static void gp2ap002_get_adc(struct gp2ap002_chip *chip) +{ + if (chip->get_adc) + chip->adc = chip->get_adc(); +} + +static void gp2ap002_get_level(struct gp2ap002_chip *chip) +{ + int i; + + gp2ap002_get_adc(chip); + + for (i = 0; i < GP2AP002_MAX_LUX; i++) { + if (lux_table[i] > chip->adc) { + chip->level = i; + break; + } + } +} + +static void gp2ap002_set_mode(struct gp2ap002_chip *chip, int enable) +{ + if (enable == chip->enable) + return; + + chip->enable = enable; + chip->vo = 0; + + gp2ap002_write_reg(chip->client, GP2AP002_OPMOD, OPMOD_SSD_SHUTDOWN); + + if (enable) { + gp2ap002_write_reg(chip->client, GP2AP002_OPMOD, + OPMOD_SSD_OPERATING | chip->mode); + gp2ap002_get_vo(chip); + } +} + +static void gp2ap002_set_enable(struct gp2ap002_chip *chip, const char *buf) +{ + if (!strncmp(buf, "1", 1)) + gp2ap002_set_mode(chip, 1); + else if (!strncmp(buf, "0", 1)) + gp2ap002_set_mode(chip, 0); +} + +static void gp2ap002_update_data(struct gp2ap002_chip *chip) +{ + gp2ap002_get_vo(chip); + enable_irq(chip->client->irq); +} + +static void gp2ap002_work(struct work_struct *work) +{ + struct gp2ap002_chip *chip = container_of(work, + struct gp2ap002_chip, work); + + mutex_lock(&chip->lock); + + gp2ap002_update_data(chip); + + input_report_abs(chip->idev, ABS_DISTANCE, chip->vo); + input_sync(chip->idev); + + mutex_unlock(&chip->lock); +} + +static irqreturn_t gp2ap002_irq(int irq, void *data) +{ + struct gp2ap002_chip *chip = data; + + if (!work_pending(&chip->work)) { + disable_irq_nosync(irq); + schedule_work(&chip->work); + } else { + dev_err(&chip->client->dev, "work pending\n"); + } + + return IRQ_HANDLED; +} + +#define GP2AP002_OUTPUT(name, field) \ +static ssize_t gp2ap002_show_##name(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + struct gp2ap002_chip *chip = dev_get_drvdata(dev); \ + gp2ap002_get_##name(chip); \ + return sprintf(buf, "%d\n", chip->field); \ +} \ +static SENSOR_DEVICE_ATTR(name, S_IRUGO, gp2ap002_show_##name, NULL, 0); + +#define GP2AP002_INPUT(name, field) \ +static ssize_t gp2ap002_store_##name(struct device *dev, \ + struct device_attribute *attr, const char *buf, size_t count) \ +{ \ + struct gp2ap002_chip *chip = dev_get_drvdata(dev); \ + if (!count) \ + return -EINVAL; \ + gp2ap002_set_##name(chip, buf); \ + return count; \ +} \ +static ssize_t gp2ap002_show_##name(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + struct gp2ap002_chip *chip = dev_get_drvdata(dev); \ + return sprintf(buf, "%d\n", chip->field); \ +} \ +static SENSOR_DEVICE_ATTR(name, S_IRUGO | S_IWUSR, \ + gp2ap002_show_##name, gp2ap002_store_##name, 0); + +GP2AP002_OUTPUT(vo, vo); +GP2AP002_INPUT(enable, enable); +GP2AP002_OUTPUT(adc, adc); +GP2AP002_OUTPUT(level, level); + +static struct attribute *proximity_attributes[] = { + &sensor_dev_attr_vo.dev_attr.attr, + &sensor_dev_attr_enable.dev_attr.attr, + NULL +}; + +static struct attribute *ambient_attributes[] = { + &sensor_dev_attr_adc.dev_attr.attr, + &sensor_dev_attr_level.dev_attr.attr, + NULL +}; + +static const struct attribute_group proximity_group = { + .name = "proximity", + .attrs = proximity_attributes, +}; + +static const struct attribute_group ambient_group = { + .name = "ambient", + .attrs = ambient_attributes, +}; + +static void gp2ap002_unregister_input_device(struct gp2ap002_chip *chip) +{ + struct i2c_client *client = chip->client; + + if (client->irq > 0) + free_irq(client->irq, chip); + + input_unregister_device(chip->idev); + input_free_device(chip->idev); +} + +static int gp2ap002_register_input_device(struct gp2ap002_chip *chip) +{ + struct i2c_client *client = chip->client; + struct input_dev *idev; + int ret; + + idev = chip->idev = input_allocate_device(); + if (!idev) { + dev_err(&client->dev, "allocating input device is failed\n"); + ret = -ENOMEM; + goto error_alloc; + } + + idev->name = "GP2AP002 OpticalSensor"; + idev->id.bustype = BUS_I2C; + idev->dev.parent = &client->dev; + idev->evbit[0] = BIT_MASK(EV_ABS); + + input_set_abs_params(idev, ABS_DISTANCE, 0, 1, 0, 0); + + input_set_drvdata(idev, chip); + + ret = input_register_device(idev); + if (ret) { + dev_err(&client->dev, "registering input device is failed\n"); + goto error_reg; + } + + if (client->irq > 0) { + unsigned long irq_flag = IRQF_DISABLED; + + if (chip->mode == OPMOD_VCON_IRQ) + irq_flag |= IRQF_TRIGGER_FALLING; + else + irq_flag |= IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING; + + ret = request_irq(client->irq, gp2ap002_irq, irq_flag, + "GP2AP002 OpticalSensor", chip); + if (ret) { + dev_err(&client->dev, "can't get IRQ %d, ret %d\n", + client->irq, ret); + goto error_irq; + } + } + + return 0; + +error_irq: + input_unregister_device(idev); +error_reg: + input_free_device(idev); +error_alloc: + return ret; +} + + +static int gp2ap002_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); + struct gp2ap002_chip *chip; + struct gp2ap002_platform_data *pdata; + int ret; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) + return -EIO; + + chip = kzalloc(sizeof(struct gp2ap002_chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + pdata = client->dev.platform_data; + + chip->client = client; + i2c_set_clientdata(client, chip); + + chip->dev = hwmon_device_register(&client->dev); + if (IS_ERR(chip->dev)) { + dev_err(&client->dev, + "Registering to hwmon device is failed\n"); + ret = PTR_ERR(chip->dev); + goto error_hwmon; + } + + ret = sysfs_create_group(&client->dev.kobj, &proximity_group); + if (ret) { + dev_err(&client->dev, + "Creating proximity attribute group failed\n"); + goto error_sysfs1; + } + + ret = sysfs_create_group(&client->dev.kobj, &ambient_group); + if (ret) { + dev_err(&client->dev, + "Creating light attribute group failed\n"); + goto error_sysfs2; + } + + ret = gp2ap002_register_input_device(chip); + if (ret) { + dev_err(&client->dev, "Registering input device is failed\n"); + goto error_input; + } + + chip->power_enable = pdata->power_enable; + chip->get_adc = pdata->get_adc; + chip->vo_gpio = pdata->vo_gpio; + chip->mode = pdata->prox_mode; + + INIT_WORK(&chip->work, gp2ap002_work); + mutex_init(&chip->lock); + + if (chip->power_enable) + chip->power_enable(0); + + gp2ap002_set_mode(chip, pdata->enable); + + return 0; + +error_input: + sysfs_remove_group(&client->dev.kobj, &ambient_group); +error_sysfs2: + sysfs_remove_group(&client->dev.kobj, &proximity_group); +error_sysfs1: + hwmon_device_unregister(chip->dev); +error_hwmon: + i2c_set_clientdata(client, NULL); + kfree(chip); + return ret; +} + +static int __exit gp2ap002_remove(struct i2c_client *client) +{ + struct gp2ap002_chip *chip = i2c_get_clientdata(client); + + gp2ap002_unregister_input_device(chip); + hwmon_device_unregister(chip->dev); + + sysfs_remove_group(&client->dev.kobj, &proximity_group); + sysfs_remove_group(&client->dev.kobj, &ambient_group); + + i2c_set_clientdata(client, NULL); + + if (chip->power_enable) + chip->power_enable(0); + + kfree(chip); + return 0; +} + +#ifdef CONFIG_PM + +static int gp2ap002_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct gp2ap002_chip *chip = i2c_get_clientdata(client); + gp2ap002_set_mode(chip, 0); + + return 0; +} + +static int gp2ap002_resume(struct i2c_client *client) +{ + struct gp2ap002_chip *chip = i2c_get_clientdata(client); + gp2ap002_set_mode(chip, 1); + + return 0; +} + +#else + +#define gp2ap002_suspend NULL +#define gp2ap002_resume NULL + +#endif /* CONFIG_PM */ + +static const struct i2c_device_id gp2ap002_id[] = { + { "GP2AP002", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, gp2ap002_id); + +static struct i2c_driver gp2ap002_i2c_driver = { + .driver = { + .name = "GP2AP002", + }, + .probe = gp2ap002_probe, + .remove = __exit_p(gp2ap002_remove), + .suspend = gp2ap002_suspend, + .resume = gp2ap002_resume, + .id_table = gp2ap002_id, +}; + +static int __init gp2ap002_init(void) +{ + return i2c_add_driver(&gp2ap002_i2c_driver); +} +module_init(gp2ap002_init); + +static void __exit gp2ap002_exit(void) +{ + i2c_del_driver(&gp2ap002_i2c_driver); +} +module_exit(gp2ap002_exit); + +MODULE_AUTHOR("Minkyu Kang "); +MODULE_DESCRIPTION("GP2AP002 Proximity/Ambient Light Sensor driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/gp2ap002.h b/include/linux/gp2ap002.h new file mode 100644 index 0000000..b6a950b --- /dev/null +++ b/include/linux/gp2ap002.h @@ -0,0 +1,21 @@ +/* + * Copyright (C) 2009 Samsung Electronics + * Minkyu Kang + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __GP2AP002_H_ +#define __GP2AP002_H_ + +struct gp2ap002_platform_data { + int (*get_adc)(void); + void (*power_enable)(int); + int vo_gpio; + int prox_mode; + int enable; +}; + +#endif -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/