diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/keyboard/qt2160.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/input/keyboard/qt2160.c | 386 |
1 files changed, 0 insertions, 386 deletions
diff --git a/ANDROID_3.4.5/drivers/input/keyboard/qt2160.c b/ANDROID_3.4.5/drivers/input/keyboard/qt2160.c deleted file mode 100644 index e7a5e36e..00000000 --- a/ANDROID_3.4.5/drivers/input/keyboard/qt2160.c +++ /dev/null @@ -1,386 +0,0 @@ -/* - * qt2160.c - Atmel AT42QT2160 Touch Sense Controller - * - * Copyright (C) 2009 Raphael Derosso Pereira <raphaelpereira@gmail.com> - * - * 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/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <linux/i2c.h> -#include <linux/irq.h> -#include <linux/interrupt.h> -#include <linux/input.h> - -#define QT2160_VALID_CHIPID 0x11 - -#define QT2160_CMD_CHIPID 0 -#define QT2160_CMD_CODEVER 1 -#define QT2160_CMD_GSTAT 2 -#define QT2160_CMD_KEYS3 3 -#define QT2160_CMD_KEYS4 4 -#define QT2160_CMD_SLIDE 5 -#define QT2160_CMD_GPIOS 6 -#define QT2160_CMD_SUBVER 7 -#define QT2160_CMD_CALIBRATE 10 - -#define QT2160_CYCLE_INTERVAL (2*HZ) - -static unsigned char qt2160_key2code[] = { - KEY_0, KEY_1, KEY_2, KEY_3, - KEY_4, KEY_5, KEY_6, KEY_7, - KEY_8, KEY_9, KEY_A, KEY_B, - KEY_C, KEY_D, KEY_E, KEY_F, -}; - -struct qt2160_data { - struct i2c_client *client; - struct input_dev *input; - struct delayed_work dwork; - spinlock_t lock; /* Protects canceling/rescheduling of dwork */ - unsigned short keycodes[ARRAY_SIZE(qt2160_key2code)]; - u16 key_matrix; -}; - -static int qt2160_read_block(struct i2c_client *client, - u8 inireg, u8 *buffer, unsigned int count) -{ - int error, idx = 0; - - /* - * Can't use SMBus block data read. Check for I2C functionality to speed - * things up whenever possible. Otherwise we will be forced to read - * sequentially. - */ - if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - - error = i2c_smbus_write_byte(client, inireg + idx); - if (error) { - dev_err(&client->dev, - "couldn't send request. Returned %d\n", error); - return error; - } - - error = i2c_master_recv(client, buffer, count); - if (error != count) { - dev_err(&client->dev, - "couldn't read registers. Returned %d bytes\n", error); - return error; - } - } else { - - while (count--) { - int data; - - error = i2c_smbus_write_byte(client, inireg + idx); - if (error) { - dev_err(&client->dev, - "couldn't send request. Returned %d\n", error); - return error; - } - - data = i2c_smbus_read_byte(client); - if (data < 0) { - dev_err(&client->dev, - "couldn't read register. Returned %d\n", data); - return data; - } - - buffer[idx++] = data; - } - } - - return 0; -} - -static int qt2160_get_key_matrix(struct qt2160_data *qt2160) -{ - struct i2c_client *client = qt2160->client; - struct input_dev *input = qt2160->input; - u8 regs[6]; - u16 old_matrix, new_matrix; - int ret, i, mask; - - dev_dbg(&client->dev, "requesting keys...\n"); - - /* - * Read all registers from General Status Register - * to GPIOs register - */ - ret = qt2160_read_block(client, QT2160_CMD_GSTAT, regs, 6); - if (ret) { - dev_err(&client->dev, - "could not perform chip read.\n"); - return ret; - } - - old_matrix = qt2160->key_matrix; - qt2160->key_matrix = new_matrix = (regs[2] << 8) | regs[1]; - - mask = 0x01; - for (i = 0; i < 16; ++i, mask <<= 1) { - int keyval = new_matrix & mask; - - if ((old_matrix & mask) != keyval) { - input_report_key(input, qt2160->keycodes[i], keyval); - dev_dbg(&client->dev, "key %d %s\n", - i, keyval ? "pressed" : "released"); - } - } - - input_sync(input); - - return 0; -} - -static irqreturn_t qt2160_irq(int irq, void *_qt2160) -{ - struct qt2160_data *qt2160 = _qt2160; - unsigned long flags; - - spin_lock_irqsave(&qt2160->lock, flags); - - __cancel_delayed_work(&qt2160->dwork); - schedule_delayed_work(&qt2160->dwork, 0); - - spin_unlock_irqrestore(&qt2160->lock, flags); - - return IRQ_HANDLED; -} - -static void qt2160_schedule_read(struct qt2160_data *qt2160) -{ - spin_lock_irq(&qt2160->lock); - schedule_delayed_work(&qt2160->dwork, QT2160_CYCLE_INTERVAL); - spin_unlock_irq(&qt2160->lock); -} - -static void qt2160_worker(struct work_struct *work) -{ - struct qt2160_data *qt2160 = - container_of(work, struct qt2160_data, dwork.work); - - dev_dbg(&qt2160->client->dev, "worker\n"); - - qt2160_get_key_matrix(qt2160); - - /* Avoid device lock up by checking every so often */ - qt2160_schedule_read(qt2160); -} - -static int __devinit qt2160_read(struct i2c_client *client, u8 reg) -{ - int ret; - - ret = i2c_smbus_write_byte(client, reg); - if (ret) { - dev_err(&client->dev, - "couldn't send request. Returned %d\n", ret); - return ret; - } - - ret = i2c_smbus_read_byte(client); - if (ret < 0) { - dev_err(&client->dev, - "couldn't read register. Returned %d\n", ret); - return ret; - } - - return ret; -} - -static int __devinit qt2160_write(struct i2c_client *client, u8 reg, u8 data) -{ - int error; - - error = i2c_smbus_write_byte(client, reg); - if (error) { - dev_err(&client->dev, - "couldn't send request. Returned %d\n", error); - return error; - } - - error = i2c_smbus_write_byte(client, data); - if (error) { - dev_err(&client->dev, - "couldn't write data. Returned %d\n", error); - return error; - } - - return error; -} - - -static bool __devinit qt2160_identify(struct i2c_client *client) -{ - int id, ver, rev; - - /* Read Chid ID to check if chip is valid */ - id = qt2160_read(client, QT2160_CMD_CHIPID); - if (id != QT2160_VALID_CHIPID) { - dev_err(&client->dev, "ID %d not supported\n", id); - return false; - } - - /* Read chip firmware version */ - ver = qt2160_read(client, QT2160_CMD_CODEVER); - if (ver < 0) { - dev_err(&client->dev, "could not get firmware version\n"); - return false; - } - - /* Read chip firmware revision */ - rev = qt2160_read(client, QT2160_CMD_SUBVER); - if (rev < 0) { - dev_err(&client->dev, "could not get firmware revision\n"); - return false; - } - - dev_info(&client->dev, "AT42QT2160 firmware version %d.%d.%d\n", - ver >> 4, ver & 0xf, rev); - - return true; -} - -static int __devinit qt2160_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct qt2160_data *qt2160; - struct input_dev *input; - int i; - int error; - - /* Check functionality */ - error = i2c_check_functionality(client->adapter, - I2C_FUNC_SMBUS_BYTE); - if (!error) { - dev_err(&client->dev, "%s adapter not supported\n", - dev_driver_string(&client->adapter->dev)); - return -ENODEV; - } - - if (!qt2160_identify(client)) - return -ENODEV; - - /* Chip is valid and active. Allocate structure */ - qt2160 = kzalloc(sizeof(struct qt2160_data), GFP_KERNEL); - input = input_allocate_device(); - if (!qt2160 || !input) { - dev_err(&client->dev, "insufficient memory\n"); - error = -ENOMEM; - goto err_free_mem; - } - - qt2160->client = client; - qt2160->input = input; - INIT_DELAYED_WORK(&qt2160->dwork, qt2160_worker); - spin_lock_init(&qt2160->lock); - - input->name = "AT42QT2160 Touch Sense Keyboard"; - input->id.bustype = BUS_I2C; - - input->keycode = qt2160->keycodes; - input->keycodesize = sizeof(qt2160->keycodes[0]); - input->keycodemax = ARRAY_SIZE(qt2160_key2code); - - __set_bit(EV_KEY, input->evbit); - __clear_bit(EV_REP, input->evbit); - for (i = 0; i < ARRAY_SIZE(qt2160_key2code); i++) { - qt2160->keycodes[i] = qt2160_key2code[i]; - __set_bit(qt2160_key2code[i], input->keybit); - } - __clear_bit(KEY_RESERVED, input->keybit); - - /* Calibrate device */ - error = qt2160_write(client, QT2160_CMD_CALIBRATE, 1); - if (error) { - dev_err(&client->dev, "failed to calibrate device\n"); - goto err_free_mem; - } - - if (client->irq) { - error = request_irq(client->irq, qt2160_irq, - IRQF_TRIGGER_FALLING, "qt2160", qt2160); - if (error) { - dev_err(&client->dev, - "failed to allocate irq %d\n", client->irq); - goto err_free_mem; - } - } - - error = input_register_device(qt2160->input); - if (error) { - dev_err(&client->dev, - "Failed to register input device\n"); - goto err_free_irq; - } - - i2c_set_clientdata(client, qt2160); - qt2160_schedule_read(qt2160); - - return 0; - -err_free_irq: - if (client->irq) - free_irq(client->irq, qt2160); -err_free_mem: - input_free_device(input); - kfree(qt2160); - return error; -} - -static int __devexit qt2160_remove(struct i2c_client *client) -{ - struct qt2160_data *qt2160 = i2c_get_clientdata(client); - - /* Release IRQ so no queue will be scheduled */ - if (client->irq) - free_irq(client->irq, qt2160); - - cancel_delayed_work_sync(&qt2160->dwork); - - input_unregister_device(qt2160->input); - kfree(qt2160); - - return 0; -} - -static const struct i2c_device_id qt2160_idtable[] = { - { "qt2160", 0, }, - { } -}; - -MODULE_DEVICE_TABLE(i2c, qt2160_idtable); - -static struct i2c_driver qt2160_driver = { - .driver = { - .name = "qt2160", - .owner = THIS_MODULE, - }, - - .id_table = qt2160_idtable, - .probe = qt2160_probe, - .remove = __devexit_p(qt2160_remove), -}; - -module_i2c_driver(qt2160_driver); - -MODULE_AUTHOR("Raphael Derosso Pereira <raphaelpereira@gmail.com>"); -MODULE_DESCRIPTION("Driver for AT42QT2160 Touch Sensor"); -MODULE_LICENSE("GPL"); |