Input: add ST1232 touchscreen controller driver (56a8bd6d) · Commits · 戴 / test

drivers/input/touchscreen/Kconfig

+17 −5

Original line number	Diff line number	Diff line
		@@ -659,17 +659,17 @@ config TOUCHSCREEN_PCAP
		To compile this driver as a module, choose M here: the
		module will be called pcap_ts.

		config TOUCHSCREEN_TPS6507X
		tristate "TPS6507x based touchscreens"
		config TOUCHSCREEN_ST1232
		tristate "Sitronix ST1232 touchscreen controllers"
		depends on I2C
		help
		Say Y here if you have a TPS6507x based touchscreen
		controller.
		Say Y here if you want to support Sitronix ST1232
		touchscreen controller.

		If unsure, say N.

		To compile this driver as a module, choose M here: the
		module will be called tps6507x_ts.
		module will be called st1232_ts.

		config TOUCHSCREEN_STMPE
		tristate "STMicroelectronics STMPE touchscreens"
		@@ -681,4 +681,16 @@ config TOUCHSCREEN_STMPE
		To compile this driver as a module, choose M here: the
		module will be called stmpe-ts.

		config TOUCHSCREEN_TPS6507X
		tristate "TPS6507x based touchscreens"
		depends on I2C
		help
		Say Y here if you have a TPS6507x based touchscreen
		controller.

		If unsure, say N.

		To compile this driver as a module, choose M here: the
		module will be called tps6507x_ts.

		endif

drivers/input/touchscreen/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o
		obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o
		obj-$(CONFIG_TOUCHSCREEN_QT602240) += qt602240_ts.o
		obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
		obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
		obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
		obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o
		obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o

drivers/input/touchscreen/st1232.c

0 → 100644

+274 −0

Original line number	Diff line number	Diff line
		/*
		* ST1232 Touchscreen Controller Driver
		*
		* Copyright (C) 2010 Renesas Solutions Corp.
		* Tony SIM <chinyeow.sim.xt@renesas.com>
		*
		* Using code from:
		* - android.git.kernel.org: projects/kernel/common.git: synaptics_i2c_rmi.c
		* Copyright (C) 2007 Google, Inc.
		*
		* 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.
		*/

		#include <linux/delay.h>
		#include <linux/i2c.h>
		#include <linux/input.h>
		#include <linux/interrupt.h>
		#include <linux/module.h>
		#include <linux/slab.h>
		#include <linux/types.h>

		#define ST1232_TS_NAME "st1232-ts"

		#define MIN_X 0x00
		#define MIN_Y 0x00
		#define MAX_X 0x31f /* (800 - 1) */
		#define MAX_Y 0x1df /* (480 - 1) */
		#define MAX_AREA 0xff
		#define MAX_FINGERS 2

		struct st1232_ts_finger {
		u16 x;
		u16 y;
		u8 t;
		bool is_valid;
		};

		struct st1232_ts_data {
		struct i2c_client *client;
		struct input_dev *input_dev;
		struct st1232_ts_finger finger[MAX_FINGERS];
		};

		static int st1232_ts_read_data(struct st1232_ts_data *ts)
		{
		struct st1232_ts_finger *finger = ts->finger;
		struct i2c_client *client = ts->client;
		struct i2c_msg msg[2];
		int error;
		u8 start_reg;
		u8 buf[10];

		/* read touchscreen data from ST1232 */
		msg[0].addr = client->addr;
		msg[0].flags = 0;
		msg[0].len = 1;
		msg[0].buf = &start_reg;
		start_reg = 0x10;

		msg[1].addr = ts->client->addr;
		msg[1].flags = I2C_M_RD;
		msg[1].len = sizeof(buf);
		msg[1].buf = buf;

		error = i2c_transfer(client->adapter, msg, 2);
		if (error < 0)
		return error;

		/* get "valid" bits */
		finger[0].is_valid = buf[2] >> 7;
		finger[1].is_valid = buf[5] >> 7;

		/* get xy coordinate */
		if (finger[0].is_valid) {
		finger[0].x = ((buf[2] & 0x0070) << 4) \| buf[3];
		finger[0].y = ((buf[2] & 0x0007) << 8) \| buf[4];
		finger[0].t = buf[8];
		}

		if (finger[1].is_valid) {
		finger[1].x = ((buf[5] & 0x0070) << 4) \| buf[6];
		finger[1].y = ((buf[5] & 0x0007) << 8) \| buf[7];
		finger[1].t = buf[9];
		}

		return 0;
		}

		static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id)
		{
		struct st1232_ts_data *ts = dev_id;
		struct st1232_ts_finger *finger = ts->finger;
		struct input_dev *input_dev = ts->input_dev;
		int count = 0;
		int i, ret;

		ret = st1232_ts_read_data(ts);
		if (ret < 0)
		goto end;

		/* multi touch protocol */
		for (i = 0; i < MAX_FINGERS; i++) {
		if (!finger[i].is_valid)
		continue;

		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, finger[i].t);
		input_report_abs(input_dev, ABS_MT_POSITION_X, finger[i].x);
		input_report_abs(input_dev, ABS_MT_POSITION_Y, finger[i].y);
		input_mt_sync(input_dev);
		count++;
		}

		/* SYN_MT_REPORT only if no contact */
		if (!count)
		input_mt_sync(input_dev);

		/* SYN_REPORT */
		input_sync(input_dev);

		end:
		return IRQ_HANDLED;
		}

		static int __devinit st1232_ts_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		struct st1232_ts_data *ts;
		struct input_dev *input_dev;
		int error;

		if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "need I2C_FUNC_I2C\n");
		return -EIO;
		}

		if (!client->irq) {
		dev_err(&client->dev, "no IRQ?\n");
		return -EINVAL;
		}


		ts = kzalloc(sizeof(struct st1232_ts_data), GFP_KERNEL);
		input_dev = input_allocate_device();
		if (!ts \|\| !input_dev) {
		error = -ENOMEM;
		goto err_free_mem;
		}

		ts->client = client;
		ts->input_dev = input_dev;

		input_dev->name = "st1232-touchscreen";
		input_dev->id.bustype = BUS_I2C;
		input_dev->dev.parent = &client->dev;

		__set_bit(EV_SYN, input_dev->evbit);
		__set_bit(EV_KEY, input_dev->evbit);
		__set_bit(EV_ABS, input_dev->evbit);

		input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, MAX_AREA, 0, 0);
		input_set_abs_params(input_dev, ABS_MT_POSITION_X, MIN_X, MAX_X, 0, 0);
		input_set_abs_params(input_dev, ABS_MT_POSITION_Y, MIN_Y, MAX_Y, 0, 0);

		error = request_threaded_irq(client->irq, NULL, st1232_ts_irq_handler,
		IRQF_ONESHOT, client->name, ts);
		if (error) {
		dev_err(&client->dev, "Failed to register interrupt\n");
		goto err_free_mem;
		}

		error = input_register_device(ts->input_dev);
		if (error) {
		dev_err(&client->dev, "Unable to register %s input device\n",
		input_dev->name);
		goto err_free_irq;
		}

		i2c_set_clientdata(client, ts);
		device_init_wakeup(&client->dev, 1);

		return 0;

		err_free_irq:
		free_irq(client->irq, ts);
		err_free_mem:
		input_free_device(input_dev);
		kfree(ts);
		return error;
		}

		static int __devexit st1232_ts_remove(struct i2c_client *client)
		{
		struct st1232_ts_data *ts = i2c_get_clientdata(client);

		device_init_wakeup(&client->dev, 0);
		free_irq(client->irq, ts);
		input_unregister_device(ts->input_dev);
		kfree(ts);

		return 0;
		}

		#ifdef CONFIG_PM
		static int st1232_ts_suspend(struct device *dev)
		{
		struct i2c_client *client = to_i2c_client(dev);

		if (device_may_wakeup(&client->dev))
		enable_irq_wake(client->irq);
		else
		disable_irq(client->irq);

		return 0;
		}

		static int st1232_ts_resume(struct device *dev)
		{
		struct i2c_client *client = to_i2c_client(dev);

		if (device_may_wakeup(&client->dev))
		disable_irq_wake(client->irq);
		else
		enable_irq(client->irq);

		return 0;
		}

		static const struct dev_pm_ops st1232_ts_pm_ops = {
		.suspend = st1232_ts_suspend,
		.resume = st1232_ts_resume,
		};
		#endif

		static const struct i2c_device_id st1232_ts_id[] = {
		{ ST1232_TS_NAME, 0 },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, st1232_ts_id);

		static struct i2c_driver st1232_ts_driver = {
		.probe = st1232_ts_probe,
		.remove = __devexit_p(st1232_ts_remove),
		.id_table = st1232_ts_id,
		.driver = {
		.name = ST1232_TS_NAME,
		.owner = THIS_MODULE,
		#ifdef CONFIG_PM
		.pm = &st1232_ts_pm_ops,
		#endif
		},
		};

		static int __init st1232_ts_init(void)
		{
		return i2c_add_driver(&st1232_ts_driver);
		}
		module_init(st1232_ts_init);

		static void __exit st1232_ts_exit(void)
		{
		i2c_del_driver(&st1232_ts_driver);
		}
		module_exit(st1232_ts_exit);

		MODULE_AUTHOR("Tony SIM <chinyeow.sim.xt@renesas.com>");
		MODULE_DESCRIPTION("SITRONIX ST1232 Touchscreen Controller Driver");
		MODULE_LICENSE("GPL");

Admin message