3 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
4 * For use with Cypress Txx3xx parts.
5 * Supported parts include:
9 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
10 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * version 2, and only version 2, as published by the
15 * Free Software Foundation.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26 * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
30 #include "cyttsp_core.h"
32 #include <linux/i2c.h>
33 #include <linux/input.h>
35 #define CY_I2C_DATA_SIZE 128
37 static int cyttsp_i2c_read_block_data(struct cyttsp *ts,
38 u8 addr, u8 length, void *values)
40 struct i2c_client *client = to_i2c_client(ts->dev);
41 struct i2c_msg msgs[] = {
57 retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
61 return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
64 static int cyttsp_i2c_write_block_data(struct cyttsp *ts,
65 u8 addr, u8 length, const void *values)
67 struct i2c_client *client = to_i2c_client(ts->dev);
70 ts->xfer_buf[0] = addr;
71 memcpy(&ts->xfer_buf[1], values, length);
73 retval = i2c_master_send(client, ts->xfer_buf, length + 1);
75 return retval < 0 ? retval : 0;
78 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
80 .write = cyttsp_i2c_write_block_data,
81 .read = cyttsp_i2c_read_block_data,
84 static int cyttsp_i2c_probe(struct i2c_client *client,
85 const struct i2c_device_id *id)
89 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
90 dev_err(&client->dev, "I2C functionality not Supported\n");
94 ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
100 i2c_set_clientdata(client, ts);
105 static int cyttsp_i2c_remove(struct i2c_client *client)
107 struct cyttsp *ts = i2c_get_clientdata(client);
114 static const struct i2c_device_id cyttsp_i2c_id[] = {
118 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
120 static struct i2c_driver cyttsp_i2c_driver = {
123 .owner = THIS_MODULE,
124 .pm = &cyttsp_pm_ops,
126 .probe = cyttsp_i2c_probe,
127 .remove = cyttsp_i2c_remove,
128 .id_table = cyttsp_i2c_id,
131 module_i2c_driver(cyttsp_i2c_driver);
133 MODULE_LICENSE("GPL");
134 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
135 MODULE_AUTHOR("Cypress");
136 MODULE_ALIAS("i2c:cyttsp");