ENGR00139238-2 Touch: add p1003 and egalax

Add p1003 and egalax touch driver

Signed-off-by: Frank Li <Frank.Li@freescale.com>

4 files changed, 382 insertions, 7 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 7cd31c031096..c698e138e86c 100755
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -177,6 +177,16 @@ config TOUCHSCREEN_EETI
 	  To compile this driver as a module, choose M here: the
 	  module will be called eeti_ts.
 
+config TOUCHSCREEN_EGALAX
+	tristate "EETI eGalax multi-touchscreen panel support"
+	depends on I2C
+	help
+	  Say Y here to enable support for I2C connected EETI
+	  eGalax multiple touch panels.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called egalax_ts.
+
 config TOUCHSCREEN_FUJITSU
 	tristate "Fujitsu serial touchscreen"
 	select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 4a4dfe2fe4f2..63c23d061916 100755
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -64,3 +64,4 @@ obj-$(CONFIG_TOUCHSCREEN_W90X900)	+= w90p910_ts.o
 obj-$(CONFIG_TOUCHSCREEN_P1003)		+= p1003_ts.o
 obj-$(CONFIG_TOUCHSCREEN_TPS6507X)	+= tps6507x-ts.o
 obj-$(CONFIG_TOUCHSCREEN_MAX11801)	+= max11801_ts.o
+obj-$(CONFIG_TOUCHSCREEN_EGALAX)	+= egalax_ts.o
diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c
new file mode 100644
index 000000000000..58273b9e3567
--- /dev/null
+++ b/drivers/input/touchscreen/egalax_ts.c
@@ -0,0 +1,357 @@
+/*
+ * Driver for EETI eGalax Multiple Touch Controller
+ *
+ * Copyright (C) 2011 Freescale Semiconductor, Inc.
+ *
+ * based on max11801_ts.c
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* EETI eGalax serial touch screen controller is a I2C based multiple
+ * touch screen controller, it can supports 5 pointer multiple
+ * touch. */
+
+/* TODO:
+  - auto idle mode support
+  - early suspend support for android
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+
+#define REPORT_MODE_SINGLE		0x1
+#define REPORT_MODE_VENDOR		0x3
+#define REPORT_MODE_MTTOUCH		0x4
+
+#define MAX_SUPPORT_POINTS		5
+
+#define EVENT_MODE		0
+#define EVENT_STATUS		1
+#define EVENT_VALID_OFFSET	7
+#define EVENT_VAILD_MASK	(0x1 << EVENT_VALID_OFFSET)
+#define EVENT_ID_OFFSET		2
+#define EVENT_ID_MASK		(0xf << EVENT_ID_OFFSET)
+#define EVENT_IN_RANGE		(0x1 << 1)
+#define EVENT_DOWN_UP		(0X1 << 0)
+
+#define MAX_I2C_DATA_LEN	10
+
+struct egalax_pointer {
+	bool valid;
+	bool status;
+	u16 x;
+	u16 y;
+};
+
+struct egalax_ts {
+	struct i2c_client		*client;
+	struct input_dev		*input_dev;
+	struct egalax_pointer		events[MAX_SUPPORT_POINTS];
+};
+
+static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)
+{
+	struct egalax_ts *data = dev_id;
+	struct input_dev *input_dev = data->input_dev;
+	struct i2c_client *client = data->client;
+	struct egalax_pointer *events = data->events;
+	u8 buf[MAX_I2C_DATA_LEN];
+	int i, id, ret, x, y;
+	bool down, valid;
+	u8 state;
+
+retry:
+	ret = i2c_master_recv(client, buf, MAX_I2C_DATA_LEN);
+	if (ret == -EAGAIN)
+		goto retry;
+
+	if (ret < 0)
+		return IRQ_HANDLED;
+
+	dev_dbg(&client->dev, "recv ret:%d", ret);
+	for (i = 0; i < MAX_I2C_DATA_LEN; i++)
+		printk(KERN_DEBUG " %x ", buf[i]);
+
+	if (buf[0] != REPORT_MODE_VENDOR
+	    && buf[0] != REPORT_MODE_SINGLE
+	    && buf[0] != REPORT_MODE_MTTOUCH) {
+		/* invalid point */
+		return IRQ_HANDLED;
+	}
+
+	if (buf[0] == REPORT_MODE_VENDOR) {
+		dev_dbg(&client->dev, "vendor message, ignored\n");
+		return IRQ_HANDLED;
+	}
+
+	state = buf[1];
+	x = (buf[3] << 8) | buf[2];
+	y = (buf[5] << 8) | buf[4];
+
+	/* Currently, the panel Freescale using on SMD board _NOT_
+	 * support single pointer mode. All event are going to
+	 * multiple pointer mode.  Add single pointer mode according
+	 * to EETI eGalax I2C programming manual.
+	 */
+	if (buf[0] == REPORT_MODE_SINGLE) {
+		input_report_abs(input_dev, ABS_X, x);
+		input_report_abs(input_dev, ABS_Y, y);
+		input_report_key(input_dev, BTN_TOUCH, !!state);
+		input_sync(input_dev);
+		return IRQ_HANDLED;
+	}
+
+	/* deal with multiple touch  */
+	valid = state & EVENT_VAILD_MASK;
+	id = (state & EVENT_ID_MASK) >> EVENT_ID_OFFSET;
+	down = state & EVENT_DOWN_UP;
+
+	if (!valid || id > MAX_SUPPORT_POINTS) {
+		dev_dbg(&client->dev, "point invalid\n");
+		return IRQ_HANDLED;
+	}
+
+	if (down) {
+		/* should also report old pointers */
+		events[id].valid = valid;
+		events[id].status = down;
+		events[id].x = x;
+		events[id].y = y;
+
+#ifdef FORCE_SINGLE_POINTER_SUPPORT
+		input_report_abs(input_dev, ABS_X, x);
+		input_report_abs(input_dev, ABS_Y, y);
+		input_event(data->input_dev, EV_KEY, BTN_TOUCH, 1);
+		input_report_abs(input_dev, ABS_PRESSURE, 1);
+#else
+		for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
+			if (!events[i].valid)
+				continue;
+			dev_dbg(&client->dev, "report id:%d valid:%d x:%d y:%d",
+				i, valid, x, y);
+
+			input_report_abs(input_dev,
+					 ABS_MT_TRACKING_ID, i);
+			input_report_abs(input_dev,
+					 ABS_MT_TOUCH_MAJOR, 1);
+			input_report_abs(input_dev,
+					 ABS_MT_POSITION_X, events[i].x);
+			input_report_abs(input_dev,
+					 ABS_MT_POSITION_Y, events[i].y);
+			input_mt_sync(input_dev);
+		}
+#endif
+	} else {
+		dev_dbg(&client->dev, "release id:%d\n", id);
+		events[id].valid = 0;
+		events[id].status = 0;
+#ifdef FORCE_SINGLE_POINTER_SUPPORT
+		input_report_key(input_dev, BTN_TOUCH, 0);
+		input_report_abs(input_dev, ABS_PRESSURE, 0);
+#else
+		input_report_abs(input_dev, ABS_MT_TRACKING_ID, id);
+		input_event(input_dev, EV_ABS, ABS_MT_TOUCH_MAJOR, 0);
+		input_mt_sync(input_dev);
+#endif
+	}
+
+	input_sync(input_dev);
+	return IRQ_HANDLED;
+}
+
+static int egalax_wake_up_device(struct i2c_client *client)
+{
+	int gpio = irq_to_gpio(client->irq);
+	int ret;
+
+	ret = gpio_request(gpio, "egalax_irq");
+	if (ret < 0) {
+		dev_err(&client->dev, "request gpio failed:%d\n", ret);
+		return ret;
+	}
+	/* wake up controller via an falling edge on IRQ. */
+	gpio_direction_output(gpio, 0);
+	gpio_set_value(gpio, 1);
+	/* controller should be waken up, return irq.  */
+	gpio_direction_input(gpio);
+	gpio_free(gpio);
+	return 0;
+}
+
+static int egalax_7200_firmware_version(struct i2c_client *client)
+{
+	static const u8 cmd[MAX_I2C_DATA_LEN] = { 0x03, 0x03, 0xa, 0x01, 0x41 };
+	int ret;
+	ret = i2c_master_send(client, cmd, MAX_I2C_DATA_LEN);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static int __devinit egalax_ts_probe(struct i2c_client *client,
+				       const struct i2c_device_id *id)
+{
+	struct egalax_ts *data;
+	struct input_dev *input_dev;
+	int ret;
+
+	data = kzalloc(sizeof(struct egalax_ts), GFP_KERNEL);
+	if (!data) {
+		dev_err(&client->dev, "Failed to allocate memory\n");
+		return -ENOMEM;
+	}
+
+	input_dev = input_allocate_device();
+	if (!input_dev) {
+		dev_err(&client->dev, "Failed to allocate memory\n");
+		ret = -ENOMEM;
+		goto err_free_data;
+	}
+
+	data->client = client;
+	data->input_dev = input_dev;
+	egalax_wake_up_device(client);
+	ret = egalax_7200_firmware_version(client);
+	if (ret < 0) {
+		dev_err(&client->dev,
+			"egalax_ts: failed to read firmware version\n");
+		ret = -EIO;
+		goto err_free_dev;
+	}
+
+	input_dev->name = "eGalax Touch Screen";
+	input_dev->phys = "I2C",
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->id.vendor = 0x0EEF;
+	input_dev->id.product = 0x0020;
+	input_dev->id.version = 0x0001;
+	input_dev->dev.parent = &client->dev;
+
+	__set_bit(EV_ABS, input_dev->evbit);
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_TOUCH, input_dev->keybit);
+	__set_bit(ABS_X, input_dev->absbit);
+	__set_bit(ABS_Y, input_dev->absbit);
+	__set_bit(ABS_PRESSURE, input_dev->absbit);
+	input_set_abs_params(input_dev, ABS_X, 0, 32767, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y, 0, 32767, 0, 0);
+
+#ifndef FORCE_SINGLE_POINTER_SUPPORT
+	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 32767, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 32767, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
+			     MAX_SUPPORT_POINTS, 0, 0);
+#endif
+	input_set_drvdata(input_dev, data);
+
+	ret = request_threaded_irq(client->irq, NULL, egalax_ts_interrupt,
+				   IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+				   "egalax_ts", data);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to register interrupt\n");
+		goto err_free_dev;
+	}
+
+	ret = input_register_device(data->input_dev);
+	if (ret < 0)
+		goto err_free_irq;
+	i2c_set_clientdata(client, data);
+	return 0;
+
+err_free_irq:
+	free_irq(client->irq, data);
+err_free_dev:
+	input_free_device(input_dev);
+err_free_data:
+	kfree(data);
+
+	return ret;
+}
+
+static __devexit int egalax_ts_remove(struct i2c_client *client)
+{
+	struct egalax_ts *data = i2c_get_clientdata(client);
+
+	free_irq(client->irq, data);
+	input_unregister_device(data->input_dev);
+	input_free_device(data->input_dev);
+	kfree(data);
+
+	return 0;
+}
+
+static const struct i2c_device_id egalax_ts_id[] = {
+	{"egalax_ts", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, egalax_ts_id);
+
+#ifdef CONFIG_PM_SLEEP
+static int egalax_ts_suspend(struct device *dev)
+{
+	int ret;
+	u8 suspend_cmd[MAX_I2C_DATA_LEN] = {0x3, 0x6, 0xa, 0x3, 0x36,
+					    0x3f, 0x2, 0, 0, 0};
+	struct i2c_client *client = to_i2c_client(dev);
+	ret = i2c_master_send(client, suspend_cmd,
+			       MAX_I2C_DATA_LEN);
+	return ret > 0 ? 0 : ret;
+}
+
+static int egalax_ts_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	return egalax_wake_up_device(client);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(egalax_ts_pm_ops, egalax_ts_suspend, egalax_ts_resume);
+static struct i2c_driver egalax_ts_driver = {
+	.driver = {
+		.name = "egalax_ts",
+		.pm	= &egalax_ts_pm_ops,
+	},
+	.id_table	= egalax_ts_id,
+	.probe		= egalax_ts_probe,
+	.remove		= __devexit_p(egalax_ts_remove),
+};
+
+static int __init egalax_ts_init(void)
+{
+	return i2c_add_driver(&egalax_ts_driver);
+}
+
+static void __exit egalax_ts_exit(void)
+{
+	i2c_del_driver(&egalax_ts_driver);
+}
+
+module_init(egalax_ts_init);
+module_exit(egalax_ts_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Touchscreen driver for EETI eGalax touch controller");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/p1003_ts.c b/drivers/input/touchscreen/p1003_ts.c
index 653f7f523133..39e9c6573727 100644
--- a/drivers/input/touchscreen/p1003_ts.c
+++ b/drivers/input/touchscreen/p1003_ts.c
@@ -24,7 +24,6 @@
 #include <linux/i2c.h>
 #include <linux/input.h>
 #include <linux/irq.h>
-#include <linux/gpio.h>
 #include <linux/platform_device.h>
 #include <linux/fsl_devices.h>
 
@@ -41,7 +40,6 @@ struct p1003_priv {
 	struct input_dev *input;
 	char phys[32];
 	unsigned int irq;
-	unsigned int gpio;
 	struct work_struct work;
 	struct point_state old_state;
 	struct workqueue_struct *workqueue;
@@ -121,13 +119,14 @@ static void p1003_work(struct work_struct *work)
 {
 	struct p1003_priv *p1003 = container_of(work, struct p1003_priv, work);
 	struct i2c_client *client = p1003->client;
+	struct p1003_ts_platform_data *pdata = client->dev.platform_data;
 	struct input_dev *input = p1003->input;
 	struct point_state *old_state = &p1003->old_state;
 	char data[POINTER_DATA_LEN];
 	int x1, x2, y1, y2;
 
 	/* the sample can only be read when intr pin low */
-	while (!gpio_get_value(p1003->gpio)) {
+	while (!pdata->hw_status()) {
 		if (p1003_i2c_read_packet(client, data) < 0) {
 			dev_err(&client->dev, "read i2c packet failed\n");
 			continue;
@@ -151,6 +150,7 @@ static void p1003_work(struct work_struct *work)
 			input_event(input, EV_ABS, ABS_X, x1);
 			input_event(input, EV_ABS, ABS_Y, y1);
 			input_event(input, EV_KEY, BTN_TOUCH, 1);
+			input_report_abs(input, ABS_PRESSURE, 1);
 			input_sync(input);
 			old_state->x1 = x1;
 			old_state->y1 = y1;
@@ -191,6 +191,7 @@ static void p1003_work(struct work_struct *work)
 	input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, 0);
 	input_mt_sync(input);
 	input_event(input, EV_KEY, BTN_TOUCH, 0);
+	input_report_abs(input, ABS_PRESSURE, 0);
 	input_sync(input);
 	old_state->state = data[0];
 }
@@ -230,6 +231,7 @@ static int __devinit p1003_probe(struct i2c_client *client,
 	int ret, xmax, ymax;
 	struct p1003_priv *p1003;
 	struct input_dev *input_dev;
+	struct p1003_ts_platform_data *pdata = client->dev.platform_data;
 
 	if (!i2c_check_functionality(client->adapter,
 				     I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
@@ -237,6 +239,11 @@ static int __devinit p1003_probe(struct i2c_client *client,
 		return -EIO;
 	}
 
+	if (!pdata || !pdata->hw_status) {
+		dev_err(&client->dev, "No hw status function!\n");
+		return -EIO;
+	}
+
 	p1003 = kzalloc(sizeof(struct p1003_priv), GFP_KERNEL);
 	if (!p1003)
 		return -ENOMEM;
@@ -250,7 +257,6 @@ static int __devinit p1003_probe(struct i2c_client *client,
 	p1003->client = client;
 	p1003->irq = client->irq;
 	p1003->input = input_dev;
-	p1003->gpio = irq_to_gpio(client->irq);
 	p1003->workqueue = create_singlethread_workqueue("p1003");
 	INIT_WORK(&p1003->work, p1003_work);
 
@@ -278,6 +284,7 @@ static int __devinit p1003_probe(struct i2c_client *client,
 	__set_bit(BTN_TOUCH, input_dev->keybit);
 	__set_bit(ABS_X, input_dev->absbit);
 	__set_bit(ABS_Y, input_dev->absbit);
+	__set_bit(ABS_PRESSURE, input_dev->absbit);
 
 	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, xmax, 0, 0);
 	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ymax, 0, 0);
@@ -303,7 +310,7 @@ static int __devinit p1003_probe(struct i2c_client *client,
 		goto err_unreg_dev;
 	}
 
-	if (!gpio_get_value(p1003->gpio))
+	if (!pdata->hw_status())
 		queue_work(p1003->workqueue, &p1003->work);
 
 	return 0;
@@ -332,7 +339,7 @@ static int __devexit p1003_remove(struct i2c_client *client)
 }
 
 static const struct i2c_device_id p1003_idtable[] = {
-	{"p1003_ts", 0},
+	{"p1003_fwv33", 0},
 	{}
 };
 
@@ -342,7 +349,7 @@ static struct i2c_driver p1003_driver = {
 
 	.driver = {
 		   .owner = THIS_MODULE,
-		   .name = "p1003",
+		   .name = "p1003_fwv33",
 		   },
 	.id_table = p1003_idtable,
 	.probe = p1003_probe,