136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
|
|
* Source for:
|
|
* Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
|
|
* For use with Cypress Txx3xx parts.
|
|
* Supported parts include:
|
|
* CY8CTST341
|
|
* CY8CTMA340
|
|
*
|
|
* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
|
|
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
|
|
*
|
|
*/
|
|
|
|
#include "cyttsp_core.h"
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/input.h>
|
|
|
|
#define CY_I2C_DATA_SIZE 128
|
|
|
|
static int cyttsp_i2c_read_block_data(struct cyttsp *ts,
|
|
u8 addr, u8 length, void *values)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(ts->dev);
|
|
struct i2c_msg msgs[] = {
|
|
{
|
|
.addr = client->addr,
|
|
.flags = 0,
|
|
.len = 1,
|
|
.buf = &addr,
|
|
},
|
|
{
|
|
.addr = client->addr,
|
|
.flags = I2C_M_RD,
|
|
.len = length,
|
|
.buf = values,
|
|
},
|
|
};
|
|
int retval;
|
|
|
|
retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
|
|
}
|
|
|
|
static int cyttsp_i2c_write_block_data(struct cyttsp *ts,
|
|
u8 addr, u8 length, const void *values)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(ts->dev);
|
|
int retval;
|
|
|
|
ts->xfer_buf[0] = addr;
|
|
memcpy(&ts->xfer_buf[1], values, length);
|
|
|
|
retval = i2c_master_send(client, ts->xfer_buf, length + 1);
|
|
|
|
return retval < 0 ? retval : 0;
|
|
}
|
|
|
|
static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
|
|
.bustype = BUS_I2C,
|
|
.write = cyttsp_i2c_write_block_data,
|
|
.read = cyttsp_i2c_read_block_data,
|
|
};
|
|
|
|
static int __devinit cyttsp_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct cyttsp *ts;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
|
|
dev_err(&client->dev, "I2C functionality not Supported\n");
|
|
return -EIO;
|
|
}
|
|
|
|
ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
|
|
CY_I2C_DATA_SIZE);
|
|
|
|
if (IS_ERR(ts))
|
|
return PTR_ERR(ts);
|
|
|
|
i2c_set_clientdata(client, ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit cyttsp_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct cyttsp *ts = i2c_get_clientdata(client);
|
|
|
|
cyttsp_remove(ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id cyttsp_i2c_id[] = {
|
|
{ CY_I2C_NAME, 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
|
|
|
|
static struct i2c_driver cyttsp_i2c_driver = {
|
|
.driver = {
|
|
.name = CY_I2C_NAME,
|
|
.owner = THIS_MODULE,
|
|
.pm = &cyttsp_pm_ops,
|
|
},
|
|
.probe = cyttsp_i2c_probe,
|
|
.remove = __devexit_p(cyttsp_i2c_remove),
|
|
.id_table = cyttsp_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(cyttsp_i2c_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
|
|
MODULE_AUTHOR("Cypress");
|
|
MODULE_ALIAS("i2c:cyttsp");
|