Add driver for Atmel AT42QT1070 QTouch sensor chip.
The AT42QT1070 QTouch sensor support up to 7 keys.
The driver has been tested on Atmel AT91SAM9M10-G45-EK board, it should work fine on other platform.
Signed-off-by: Shen Bo <voice.shen@xxxxxxxxx>
---
drivers/input/keyboard/Kconfig | 9 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/qt1070.c | 328 +++++++++++++++++++++++++++++++++++++++
3 files changed, 338 insertions(+), 0 deletions(-)
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 9cc488d..2e7af9f 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -124,6 +124,15 @@ config KEYBOARD_ATKBD_RDI_KEYCODES
right-hand column will be interpreted as the key shown in the
left-hand column.
+config KEYBOARD_QT1070
+ tristate "Atmel AT42QT1070 Touch Sensor Chip"
+ depends on I2C
+ help
+ Say Y here if you want to use Atmel AT42QT1070 QTouch
+ Sensor chip as input device.
+ To compile this driver as a module, choose M here:
+ the module will be called qt1070
+
config KEYBOARD_QT2160
tristate "Atmel AT42QT2160 Touch Sensor Chip"
depends on I2C && EXPERIMENTAL
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 504b591..23ecb51 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o
obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
+obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o
diff --git a/drivers/input/keyboard/qt1070.c b/drivers/input/keyboard/qt1070.c
new file mode 100755
index 0000000..37b25d3
--- /dev/null
+++ b/drivers/input/keyboard/qt1070.c
@@ -0,0 +1,328 @@
+/*
+ * qt1070.c - Atmel AT42QT1070 QTouch Sensor Controller
+ *
+ * Copyright (C) 2011 Atmel
+ *
+ * Authors: Bo Shen <voice.shen@xxxxxxxxx>
+ *
+ * Base on qt2160.c by:
+ * Raphael Derosso Pereira <raphaelpereira@xxxxxxxxx>
+ * 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>
+
+/* QT1070 I2C Slave Address */
+#define QT1070_ADDR 0x1B
+
+/* 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
+
+/* Reset */
+#define nRESET 0x39
+
+/* Key number will be used in system */
+#define KEY_NUMBER 0x7
+
+static unsigned char qt1070_key2code[] = {
+ KEY_1, KEY_2, KEY_3, KEY_4,
+ KEY_4, KEY_5, KEY_6,
+};
+
+struct qt1070_data {
+ struct i2c_client *client;
+ struct input_dev *input;
+ struct delayed_work dwork;
+ spinlock_t lock;
+ unsigned char keycodes[ARRAY_SIZE(qt1070_key2code)];
+ unsigned char key;
+};
+
+static int qt1070_read(struct i2c_client *client, u8 reg)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte(client, reg);
+ if (ret) {
+ dev_err(&client->dev,
+ "can not send request, returned %d\n", ret);
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte(client);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "can not read register, returned %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int qt1070_write(struct i2c_client *client, u8 reg, u8 data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte(client, reg);
+ if (ret) {
+ dev_err(&client->dev,
+ "can not send request, returned %d\n", ret);
+ return ret;
+ }
+
+ ret = i2c_smbus_write_byte(client, data);
+ if (ret) {
+ dev_err(&client->dev,
+ "can not write register, returned %d\n", ret);
+ return 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 int qt1070_read_key(struct qt1070_data *data)
+{
+ struct i2c_client *client = data->client;
+ struct input_dev *input = data->input;
+ u8 new_key, old_key, keyval;
+ int ret, i, mask;
+
+ /* Read the detected status register */
+ ret = qt1070_read(client, DET_STATUS);
+
+ /* Read which key changed */
+ ret = qt1070_read(client, KEY_STATUS);
+ old_key = data->key;
+ data->key = new_key = ret;
+
+ mask = 0x01;
+ for (i = 0; i < KEY_NUMBER; i++) {
+ keyval = new_key & mask;
+ if ((old_key & mask) != keyval)
+ input_report_key(input, data->keycodes[i], keyval);
+ mask <<= 1;
+ }
+ input_sync(input);
+
+ return 0;
+}
+
+static irqreturn_t qt1070_irq(int irq, void *data)
+{
+ struct qt1070_data *qt1070 = data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&qt1070->lock, flags);
+
+ cancel_delayed_work(&qt1070->dwork);
+ schedule_delayed_work(&qt1070->dwork, 0);
+
+ spin_unlock_irqrestore(&qt1070->lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+static void qt1070_schedule_read(struct qt1070_data *data)
+{
+ spin_lock_irq(&data->lock);
+ schedule_delayed_work(&data->dwork, 0);
+ spin_unlock_irq(&data->lock);
+}
+
+static void qt1070_worker(struct delayed_work *work)
+{
+ struct qt1070_data *data = container_of(work,
+ struct qt1070_data, dwork.work);
+ qt1070_read_key(data);
+}
+
+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;
+ }
+
+ /* 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;
+ INIT_DELAYED_WORK(&data->dwork, qt1070_worker);
+ spin_lock_init(&data->lock);
+
+ input->name = "AT42QT1070 Touch Sense Keyboard";
+ 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);
+ __clear_bit(EV_REP, input->evbit);
+ for (i = 0; i < ARRAY_SIZE(qt1070_key2code); i++) {
+ data->keycodes[i] = qt1070_key2code[i];
+ __set_bit(qt1070_key2code[i], input->keybit);
+ }
+
+ __clear_bit(KEY_RESERVED, input->keybit);
+
+ /* Calibrate device */
+ err = qt1070_write(client, CALIBRATE_CMD, 1);
+ if (err) {
+ dev_err(&client->dev, "Failure to calibrate device\n");
+ goto err_free_mem;
+ }
+ msleep(100);
+
+ if (client->irq) {
+ err = request_irq(client->irq, qt1070_irq, 0, "qt1070", 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_schedule_read(data);
+
+ return 0;
+
+err_free_irq:
+ if (client->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 */
+ if (client->irq)
+ free_irq(client->irq, data);
+
+ input_unregister_device(data->input);
+ kfree(data);
+
+ i2c_set_clientdata(client, NULL);
+
+ return 0;
+}
+
+static const struct i2c_device_id qt1070_id[] = {
+ { "qt1070", 0 },
+ { },
+};
+
+static struct i2c_driver qt1070_driver = {
+ .driver = {
+ .name = "qt1070",
+ .owner = THIS_MODULE,
+ },
+ .id_table = qt1070_id,
+ .probe = qt1070_probe,
+ .remove = __devexit_p(qt1070_remove),
+};
+
+static int __init qt1070_init(void)
+{
+ return i2c_add_driver(&qt1070_driver);
+}
+module_init(qt1070_init);
+
+static void __exit qt1070_exit(void)
+{
+ i2c_del_driver(&qt1070_driver);
+}
+module_exit(qt1070_exit);
+
+MODULE_AUTHOR("Bo Shen <voice.shen@xxxxxxxxx>");
+MODULE_DESCRIPTION("Driver for AT42QT1070 QTouch sensor");
+MODULE_LICENSE("GPL");
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
