Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | /*
* 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");
|