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Date: Thu, 10 Nov 2011 17:07:53 +0100
From: <oskar.andero@...yericsson.com>
To: <dmitry.torokhov@...il.com>
CC: <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<jic23@....ac.uk>, <aghayal@...eaurora.org>,
Courtney Cavin <courtney.cavin@...yericsson.com>,
Oskar Andero <oskar.andero@...yericsson.com>
Subject: [PATCH] input: add driver support for Sharp gp2ap002a00f proximity sensor
From: Courtney Cavin <courtney.cavin@...yericsson.com>
Signed-off-by: Courtney Cavin <courtney.cavin@...yericsson.com>
Signed-off-by: Oskar Andero <oskar.andero@...yericsson.com>
---
drivers/input/misc/Kconfig | 11 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/gp2ap002a00f.c | 265 +++++++++++++++++++++++++++++++++++++
include/linux/gp2ap002a00f.h | 13 ++
4 files changed, 290 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/gp2ap002a00f.c
create mode 100644 include/linux/gp2ap002a00f.h
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 22d875f..dee96a0 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -544,4 +544,15 @@ config INPUT_XEN_KBDDEV_FRONTEND
To compile this driver as a module, choose M here: the
module will be called xen-kbdfront.
+config INPUT_GP2A
+ tristate "Sharp GP2AP002A00F I2C Proximity/Opto sensor driver"
+ depends on I2C
+ default n
+ help
+ Say Y here if you have a Sharp GP2AP002A00F proximity/als combo-chip
+ hooked to an I2C bus.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gp2ap002a00f.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index a244fc6..1681993 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
+obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
diff --git a/drivers/input/misc/gp2ap002a00f.c b/drivers/input/misc/gp2ap002a00f.c
new file mode 100644
index 0000000..b1af83a
--- /dev/null
+++ b/drivers/input/misc/gp2ap002a00f.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2009,2010 Sony Ericsson Mobile Communications Inc.
+ *
+ * Author: Courtney Cavin <courtney.cavin@...yericsson.com>
+ * Prepared for up-stream by: Oskar Andero <oskar.andero@...yericsson.com>
+ *
+ * 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 <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/gp2ap002a00f.h>
+
+struct gp2a_data {
+ struct input_dev *device;
+ struct gp2a_platform_data *pdata;
+ struct i2c_client *i2c_client;
+};
+
+enum gp2a_addr {
+ GP2A_ADDR_PROX = 0x0,
+ GP2A_ADDR_GAIN = 0x1,
+ GP2A_ADDR_HYS = 0x2,
+ GP2A_ADDR_CYCLE = 0x3,
+ GP2A_ADDR_OPMOD = 0x4,
+ GP2A_ADDR_CON = 0x6
+};
+
+enum gp2a_controls {
+ GP2A_CTRL_SSD = 0x01
+};
+
+#define NUM_TRIES 5
+static int gp2a_write_byte(struct gp2a_data *dt, u8 reg, u8 val)
+{
+ int error;
+ int n;
+ struct device *dev = &dt->i2c_client->dev;
+
+ for (n = 0; n < NUM_TRIES; n++) {
+ error = i2c_smbus_write_byte_data(dt->i2c_client, reg, val);
+ if (error < 0)
+ dev_err(dev, "i2c_smbus write failed, %d\n", error);
+ else
+ return 0;
+ msleep(10);
+ }
+ return error;
+}
+
+static int gp2a_initialize(struct gp2a_data *dt)
+{
+ int error;
+
+ error = gp2a_write_byte(dt, GP2A_ADDR_GAIN, 0x08);
+ if (error < 0)
+ return error;
+
+ error = gp2a_write_byte(dt, GP2A_ADDR_HYS, 0xc2);
+ if (error < 0)
+ return error;
+
+ error = gp2a_write_byte(dt, GP2A_ADDR_CYCLE, 0x04);
+ if (error < 0)
+ return error;
+
+ error = gp2a_write_byte(dt, GP2A_ADDR_OPMOD, 0x00);
+
+ return error;
+}
+
+static int gp2a_report(struct gp2a_data *dt)
+{
+ int vo = gpio_get_value(dt->pdata->gpio);
+
+ input_report_abs(dt->device, ABS_DISTANCE, vo ? 255 : 0);
+ input_sync(dt->device);
+
+ return 0;
+}
+
+static irqreturn_t gp2a_irq(int irq, void *dev_id)
+{
+ struct device *dev = dev_id;
+ struct gp2a_data *dt = dev_get_drvdata(dev);
+
+ gp2a_report(dt);
+
+ return IRQ_HANDLED;
+}
+
+static int gp2a_device_open(struct input_dev *dev)
+{
+ struct gp2a_data *dt = input_get_drvdata(dev);
+ int error;
+
+ error = gp2a_write_byte(dt, GP2A_ADDR_OPMOD, GP2A_CTRL_SSD);
+ if (error < 0) {
+ dev_err(&dev->dev, "Unable to activate, err %d\n", error);
+ return error;
+ }
+
+ enable_irq(gpio_to_irq(dt->i2c_client->irq));
+
+ if (dt->pdata->wake)
+ enable_irq_wake(gpio_to_irq(dt->i2c_client->irq));
+
+ gp2a_report(dt);
+
+ return 0;
+}
+
+static void gp2a_device_close(struct input_dev *dev)
+{
+ struct gp2a_data *dt = input_get_drvdata(dev);
+ int error;
+
+ if (dt->pdata->wake)
+ disable_irq_wake(gpio_to_irq(dt->i2c_client->irq));
+
+ disable_irq(gpio_to_irq(dt->i2c_client->irq));
+ error = gp2a_write_byte(dt, GP2A_ADDR_OPMOD, 0);
+ if (error < 0)
+ dev_err(&dev->dev, "Unable to deactivate, err %d\n", error);
+}
+
+static int gp2a_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int gp2a_remove(struct i2c_client *client);
+
+static const struct i2c_device_id gp2a_i2c_id[] = {
+ {GP2A_I2C_NAME, 0},
+ {}
+};
+
+static struct i2c_driver gp2a_i2c_driver = {
+ .driver = {
+ .name = GP2A_I2C_NAME,
+ .owner = THIS_MODULE
+ },
+ .probe = gp2a_probe,
+ .remove = __devexit_p(gp2a_remove),
+ .id_table = gp2a_i2c_id
+};
+
+static int gp2a_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct gp2a_platform_data *pdata;
+ struct gp2a_data *dt;
+ int error;
+
+ pdata = client->dev.platform_data;
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->gpio_setup) {
+ error = pdata->gpio_setup();
+ if (error < 0)
+ return error;
+ }
+
+ error = gpio_direction_input(pdata->gpio);
+ if (error < 0)
+ goto err_gpio_shutdown;
+
+ dt = kzalloc(sizeof(struct gp2a_data), GFP_KERNEL);
+ if (!dt) {
+ error = -ENOMEM;
+ goto err_gpio_shutdown;
+ }
+
+ client->driver = &gp2a_i2c_driver;
+ dt->pdata = pdata;
+ dt->i2c_client = client;
+ i2c_set_clientdata(client, dt);
+
+ error = gp2a_initialize(dt);
+ if (error < 0)
+ goto err_free_dt;
+
+ dt->device = input_allocate_device();
+ if (!dt->device) {
+ error = -ENOMEM;
+ goto err_free_dt;
+ }
+
+ input_set_drvdata(dt->device, dt);
+
+ dt->device->open = gp2a_device_open;
+ dt->device->close = gp2a_device_close;
+ dt->device->name = GP2A_I2C_NAME;
+ dt->device->id.bustype = BUS_I2C;
+ set_bit(EV_ABS, dt->device->evbit);
+ set_bit(ABS_DISTANCE, dt->device->absbit);
+
+ input_set_abs_params(dt->device, ABS_DISTANCE, 0, 255, 0, 0);
+
+ error = input_register_device(dt->device);
+ if (error) {
+ dev_err(&dt->device->dev, "device registration failed\n");
+ input_free_device(dt->device);
+ goto err_free_dt;
+ }
+
+ error = request_threaded_irq(gpio_to_irq(dt->i2c_client->irq), NULL,
+ gp2a_irq, IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ GP2A_I2C_NAME, &dt->i2c_client->dev);
+ if (error) {
+ dev_err(&dt->device->dev, "irq request failed\n");
+ goto err_unreg_input;
+ }
+ disable_irq(gpio_to_irq(dt->i2c_client->irq));
+
+ return 0;
+
+err_unreg_input:
+ input_unregister_device(dt->device);
+err_free_dt:
+ kfree(dt);
+err_gpio_shutdown:
+ if (pdata->gpio_shutdown)
+ pdata->gpio_shutdown();
+ return error;
+}
+
+static int gp2a_remove(struct i2c_client *client)
+{
+ struct gp2a_data *dt = i2c_get_clientdata(client);
+
+ device_init_wakeup(&client->dev, 0);
+ if (dt->pdata->gpio_shutdown)
+ dt->pdata->gpio_shutdown();
+ free_irq(gpio_to_irq(dt->i2c_client->irq), &dt->i2c_client->dev);
+ input_unregister_device(dt->device);
+ kfree(dt);
+
+ return 0;
+}
+
+static int __init gp2a_init(void)
+{
+ return i2c_add_driver(&gp2a_i2c_driver);
+}
+
+static void __exit gp2a_exit(void)
+{
+ i2c_del_driver(&gp2a_i2c_driver);
+}
+
+module_init(gp2a_init);
+module_exit(gp2a_exit);
+
+MODULE_AUTHOR("Courtney Cavin <courtney.cavin@...yericsson.com>");
+MODULE_DESCRIPTION("Sharp GP2AP002A00F I2C Proximity/Opto sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/gp2ap002a00f.h b/include/linux/gp2ap002a00f.h
new file mode 100644
index 0000000..74e2610
--- /dev/null
+++ b/include/linux/gp2ap002a00f.h
@@ -0,0 +1,13 @@
+#ifndef _GP2AP002A00F_H_
+#define _GP2AP002A00F_H_
+
+#define GP2A_I2C_NAME "gp2ap002a00f"
+
+struct gp2a_platform_data {
+ int gpio;
+ int wake;
+ int (*gpio_setup)(void);
+ int (*gpio_shutdown)(void);
+};
+
+#endif
--
1.7.7
--
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