[0/1] input: keyboard: add qci keyboard driver
diff mbox

Message ID 20100903203717.GA6412@core.coreip.homeip.net
State Rejected
Headers show

Commit Message

Dmitry Torokhov Sept. 3, 2010, 8:37 p.m. UTC
None

Patch
diff mbox

diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index d63f566..2f38feb 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -373,6 +373,18 @@  config KEYBOARD_SAMSUNG
 	  To compile this driver as a module, choose M here: the
 	  module will be called samsung-keypad.
 
+config KEYBOARD_QCIGKBD
+	tristate "Quanta Computer Inc. keyboard"
+	depends on I2C
+	help
+	  This driver supports the i2c keyboard on Quanta smartbook devices.
+
+	  Say Y here if you have a Quanta-based smartbook or notepad
+	  device and want to use the Quanta i2c keyboard driver.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called qci_gkbd.
+
 config KEYBOARD_STOWAWAY
 	tristate "Stowaway keyboard"
 	select SERIO
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index c13809c..82f69f7 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -34,6 +34,7 @@  obj-$(CONFIG_KEYBOARD_OMAP4)		+= omap4-keypad.o
 obj-$(CONFIG_KEYBOARD_OPENCORES)	+= opencores-kbd.o
 obj-$(CONFIG_KEYBOARD_PXA27x)		+= pxa27x_keypad.o
 obj-$(CONFIG_KEYBOARD_PXA930_ROTARY)	+= pxa930_rotary.o
+obj-$(CONFIG_KEYBOARD_QCIGKBD)		+= qci_gkbd.o
 obj-$(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/qci_gkbd.c b/drivers/input/keyboard/qci_gkbd.c
new file mode 100644
index 0000000..6cc06c4
--- /dev/null
+++ b/drivers/input/keyboard/qci_gkbd.c
@@ -0,0 +1,259 @@ 
+/* Quanta I2C Keyboard Driver
+ *
+ * Copyright (C) 2009 Quanta Computer Inc.
+ * Author: Hsin Wu <hsin.wu@quantatw.com>
+ * Author: Austin Lai <austin.lai@quantatw.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+/*
+ *  This driver communicates via I2C to the nuvoTon WPCE775x Embedded
+ *  Controller, which has the keyboard attached to it.
+ *
+ */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/keyboard.h>
+#include <linux/gpio.h>
+#include <linux/input/qci_keyboard.h>
+
+#define QCI_KEYBOARD_ID_NAME		"qci-gkbd"
+#define QCI_KEYBOARD_NAME		"Quanta Keyboard"
+#define QCI_KEYBOARD_DEVICE		"/qci-gkbd/input0"
+#define QCI_KEYBOARD_CMD_ENABLE		0xF4
+#define QCI_KEYBOARD_CMD_DISABLE	0xF5
+#define QCI_KEYBOARD_ACK		0xFA
+#define QCI_KEYBOARD_MAX_KEY		127
+
+struct qci_keyboard {
+	struct i2c_client *client;
+	struct input_dev *input;
+	unsigned int gpio;
+	unsigned int irq;
+};
+
+#ifdef CONFIG_PM
+static int qcikbd_suspend(struct device *dev)
+{
+	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+	struct qci_keyboard *qcikbd = i2c_get_clientdata(client);
+
+	disable_irq(qcikbd->irq);
+
+	return 0;
+}
+
+static int qcikbd_resume(struct device *dev)
+{
+	struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+	struct qci_keyboard *qcikbd = i2c_get_clientdata(client);
+
+	enable_irq(qcikbd->irq);
+
+	return 0;
+}
+
+static const struct dev_pm_ops qcikbd_pm_ops = {
+	.suspend  = qcikbd_suspend,
+	.resume   = qcikbd_resume,
+};
+#endif
+
+static irqreturn_t qcikbd_interrupt(int irq, void *dev_id)
+{
+	struct qci_keyboard *qcikbd = dev_id;
+	struct input_dev *input = qcikbd->input;
+	int rc;
+	unsigned int scancode;
+	unsigned char data;
+	bool down;
+
+	rc = i2c_master_recv(qcikbd->client, &data, 1);
+	if (rc != 1)
+		goto irq_exit;
+
+	if (data == QCI_KEYBOARD_ACK)
+		goto irq_exit;
+
+	scancode = data & 0x7f;
+	down = !(data & 0x80);
+
+	if (scancode) {
+		input_event(input, EV_MSC, MSC_SCAN, scancode);
+		input_report_key(input, scancode, down);
+		input_sync(input);
+	}
+
+irq_exit:
+	return IRQ_HANDLED;
+}
+
+static int qcikbd_open(struct input_dev *dev)
+{
+	struct qci_keyboard *qcikbd = input_get_drvdata(dev);
+	u8 buf[1] = { QCI_KEYBOARD_CMD_ENABLE };
+
+	i2c_master_send(qcikbd->client, buf, 1);
+
+	return 0;
+}
+
+static void qcikbd_close(struct input_dev *dev)
+{
+	struct qci_keyboard *qcikbd = input_get_drvdata(dev);
+	u8 buf[1] = { QCI_KEYBOARD_CMD_DISABLE };
+
+	i2c_master_send(qcikbd->client, buf, 1);
+}
+
+static int __devinit qcikbd_probe(struct i2c_client *client,
+				  const struct i2c_device_id *id)
+{
+	const struct qci_keyboard_platform_data *pd = client->dev.platform_data;
+	struct qci_keyboard *qcikbd;
+	struct input_dev *input;
+	int irq_trigger_type;
+	int err;
+	int i;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		pr_err("i2c functionality failed\n");
+		return -ENODEV;
+	}
+
+	qcikbd = kzalloc(sizeof(struct qci_keyboard), GFP_KERNEL);
+	input = input_allocate_device();
+	if (!qcikbd || input) {
+		err = -ENOMEM;
+		goto err_free_mem;
+	}
+
+	qcikbd->client = client;
+	qcikbd->input = input;
+	qcikbd->gpio = client->irq;
+
+	input->name       = QCI_KEYBOARD_NAME;
+	input->phys       = QCI_KEYBOARD_DEVICE;
+	input->id.bustype = BUS_I2C;
+	input->id.vendor  = 0x1050;
+	input->id.product = 0x0006;
+	input->id.version = 0x0004;
+	input->open       = qcikbd_open;
+	input->close      = qcikbd_close;
+
+	__set_bit(EV_KEY, input->evbit);
+	__set_bit(EV_REP, input->evbit);
+	__set_bit(MSC_SCAN, input->mscbit);
+
+	/* Enable all supported keys */
+	for (i = 1; i <= QCI_KEYBOARD_MAX_KEY; i++)
+		__set_bit(i, input->keybit);
+
+	input_set_drvdata(qcikbd->input, qcikbd);
+
+	err = gpio_request(qcikbd->gpio, "qci-gkbd");
+	if (err) {
+		pr_err("gpio request failed\n");
+		goto err_free_mem;
+	}
+
+	err = gpio_direction_input(qcikbd->gpio);
+	if (err) {
+		pr_err("gpio direction failed\n");
+		goto err_free_gpio;
+	}
+
+	qcikbd->irq = gpio_to_irq(qcikbd->gpio);
+	irq_trigger_type = pd ? pd->irq_trigger_type : IRQF_TRIGGER_FALLING;
+	err = request_threaded_irq(qcikbd->irq, NULL, qcikbd_interrupt,
+				   irq_trigger_type, client->name, qcikbd);
+	if (err) {
+		pr_err("unable to get IRQ\n");
+		goto err_free_gpio;
+	}
+
+	err = input_register_device(qcikbd->input);
+	if (err) {
+		pr_err("input register device failed\n");
+		goto err_free_irq;
+	}
+
+	i2c_set_clientdata(client, qcikbd);
+	return 0;
+
+err_free_irq:
+	free_irq(qcikbd->irq, qcikbd);
+err_free_gpio:
+	gpio_free(qcikbd->gpio);
+err_free_mem:
+	input_free_device(input);
+	kfree(qcikbd);
+
+	return err;
+}
+
+static int __devexit qcikbd_remove(struct i2c_client *dev)
+{
+	struct qci_keyboard *qcikbd = i2c_get_clientdata(dev);
+
+	free_irq(qcikbd->irq, qcikbd);
+	gpio_free(qcikbd->gpio);
+	input_unregister_device(qcikbd->input);
+	kfree(qcikbd);
+
+	return 0;
+}
+
+static const struct i2c_device_id qcikbd_idtable[] = {
+	{ "wpce775-keyboard", 0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(i2c, qcikbd_idtable);
+
+static struct i2c_driver i2ckbd_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= QCI_KEYBOARD_ID_NAME,
+#ifdef CONFIG_PM
+		.pm	= &qcikbd_pm_ops,
+#endif
+	},
+	.probe		= qcikbd_probe,
+	.remove		= __devexit_p(qcikbd_remove),
+	.id_table	= qcikbd_idtable,
+};
+
+static int __init qcikbd_init(void)
+{
+	return i2c_add_driver(&i2ckbd_driver);
+}
+
+static void __exit qcikbd_exit(void)
+{
+	i2c_del_driver(&i2ckbd_driver);
+}
+
+module_init(qcikbd_init);
+module_exit(qcikbd_exit);
+
+MODULE_AUTHOR("Quanta Computer Inc.");
+MODULE_DESCRIPTION("Quanta Embedded Controller I2C Keyboard Driver");
+MODULE_ALIAS("platform:qci-gkbd");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/input/qci_keyboard.h b/include/linux/input/qci_keyboard.h
new file mode 100644
index 0000000..b32b7fc
--- /dev/null
+++ b/include/linux/input/qci_keyboard.h
@@ -0,0 +1,25 @@ 
+/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef __QCI_KEYBOARD_H
+#define __QCI_KEYBOARD_H
+
+struct qci_keyboard_platform_data {
+	unsigned long irq_trigger_type;
+};
+
+#endif