diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/qt1070.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/qt1070.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/qt1070.c b/ANDROID_3.4.5/drivers/input/keyboard/qt1070.c deleted file mode 100644 index 0b7b2f89..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/qt1070.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * Atmel AT42QT1070 QTouch Sensor Controller - * - * Copyright (C) 2011 Atmel - * - * Authors: Bo Shen <voice.shen@atmel.com> - * - * Base on AT42QT2160 driver by: - * Raphael Derosso Pereira <raphaelpereira@gmail.com> - * Copyright (C) 2009 - * - * 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/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/input.h> -#include <linux/slab.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/jiffies.h> -#include <linux/delay.h> - -/* Address for each register */ -#define CHIP_ID 0x00 -#define QT1070_CHIP_ID 0x2E - -#define FW_VERSION 0x01 -#define QT1070_FW_VERSION 0x15 - -#define DET_STATUS 0x02 - -#define KEY_STATUS 0x03 - -/* Calibrate */ -#define CALIBRATE_CMD 0x38 -#define QT1070_CAL_TIME 200 - -/* Reset */ -#define RESET 0x39 -#define QT1070_RESET_TIME 255 - -/* AT42QT1070 support up to 7 keys */ -static const unsigned short qt1070_key2code[] = { - KEY_0, KEY_1, KEY_2, KEY_3, - KEY_4, KEY_5, KEY_6, -}; - -struct qt1070_data { - struct i2c_client *client; - struct input_dev *input; - unsigned int irq; - unsigned short keycodes[ARRAY_SIZE(qt1070_key2code)]; - u8 last_keys; -}; - -static int qt1070_read(struct i2c_client *client, u8 reg) -{ - int ret; - - ret = i2c_smbus_read_byte_data(client, reg); - if (ret < 0) - dev_err(&client->dev, - "can not read register, returned %d\n", ret); - - return ret; -} - -static int qt1070_write(struct i2c_client *client, u8 reg, u8 data) -{ - int ret; - - ret = i2c_smbus_write_byte_data(client, reg, data); - if (ret < 0) - dev_err(&client->dev, - "can not write register, returned %d\n", ret); - - return ret; -} - -static bool __devinit qt1070_identify(struct i2c_client *client) -{ - int id, ver; - - /* Read Chip ID */ - id = qt1070_read(client, CHIP_ID); - if (id != QT1070_CHIP_ID) { - dev_err(&client->dev, "ID %d not supported\n", id); - return false; - } - - /* Read firmware version */ - ver = qt1070_read(client, FW_VERSION); - if (ver < 0) { - dev_err(&client->dev, "could not read the firmware version\n"); - return false; - } - - dev_info(&client->dev, "AT42QT1070 firmware version %x\n", ver); - - return true; -} - -static irqreturn_t qt1070_interrupt(int irq, void *dev_id) -{ - struct qt1070_data *data = dev_id; - struct i2c_client *client = data->client; - struct input_dev *input = data->input; - int i; - u8 new_keys, keyval, mask = 0x01; - - /* Read the detected status register, thus clearing interrupt */ - qt1070_read(client, DET_STATUS); - - /* Read which key changed */ - new_keys = qt1070_read(client, KEY_STATUS); - - for (i = 0; i < ARRAY_SIZE(qt1070_key2code); i++) { - keyval = new_keys & mask; - if ((data->last_keys & mask) != keyval) - input_report_key(input, data->keycodes[i], keyval); - mask <<= 1; - } - input_sync(input); - - data->last_keys = new_keys; - return IRQ_HANDLED; -} - -static int __devinit qt1070_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct qt1070_data *data; - struct input_dev *input; - int i; - int err; - - err = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE); - if (!err) { - dev_err(&client->dev, "%s adapter not supported\n", - dev_driver_string(&client->adapter->dev)); - return -ENODEV; - } - - if (!client->irq) { - dev_err(&client->dev, "please assign the irq to this device\n"); - return -EINVAL; - } - - /* Identify the qt1070 chip */ - if (!qt1070_identify(client)) - return -ENODEV; - - data = kzalloc(sizeof(struct qt1070_data), GFP_KERNEL); - input = input_allocate_device(); - if (!data || !input) { - dev_err(&client->dev, "insufficient memory\n"); - err = -ENOMEM; - goto err_free_mem; - } - - data->client = client; - data->input = input; - data->irq = client->irq; - - input->name = "AT42QT1070 QTouch Sensor"; - input->dev.parent = &client->dev; - input->id.bustype = BUS_I2C; - - /* Add the keycode */ - input->keycode = data->keycodes; - input->keycodesize = sizeof(data->keycodes[0]); - input->keycodemax = ARRAY_SIZE(qt1070_key2code); - - __set_bit(EV_KEY, input->evbit); - - for (i = 0; i < ARRAY_SIZE(qt1070_key2code); i++) { - data->keycodes[i] = qt1070_key2code[i]; - __set_bit(qt1070_key2code[i], input->keybit); - } - - /* Calibrate device */ - qt1070_write(client, CALIBRATE_CMD, 1); - msleep(QT1070_CAL_TIME); - - /* Soft reset */ - qt1070_write(client, RESET, 1); - msleep(QT1070_RESET_TIME); - - err = request_threaded_irq(client->irq, NULL, qt1070_interrupt, - IRQF_TRIGGER_NONE, client->dev.driver->name, data); - if (err) { - dev_err(&client->dev, "fail to request irq\n"); - goto err_free_mem; - } - - /* Register the input device */ - err = input_register_device(data->input); - if (err) { - dev_err(&client->dev, "Failed to register input device\n"); - goto err_free_irq; - } - - i2c_set_clientdata(client, data); - - /* Read to clear the chang line */ - qt1070_read(client, DET_STATUS); - - return 0; - -err_free_irq: - free_irq(client->irq, data); -err_free_mem: - input_free_device(input); - kfree(data); - return err; -} - -static int __devexit qt1070_remove(struct i2c_client *client) -{ - struct qt1070_data *data = i2c_get_clientdata(client); - - /* Release IRQ */ - free_irq(client->irq, data); - - input_unregister_device(data->input); - kfree(data); - - return 0; -} - -static const struct i2c_device_id qt1070_id[] = { - { "qt1070", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(i2c, qt1070_id); - -static struct i2c_driver qt1070_driver = { - .driver = { - .name = "qt1070", - .owner = THIS_MODULE, - }, - .id_table = qt1070_id, - .probe = qt1070_probe, - .remove = __devexit_p(qt1070_remove), -}; - -module_i2c_driver(qt1070_driver); - -MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>"); -MODULE_DESCRIPTION("Driver for AT42QT1070 QTouch sensor"); -MODULE_LICENSE("GPL"); |