62f548d0c2
In TSG4, register map is 512bytes long and to access all of it, one bit from address byte is used (which bit to use differs for I2C and SPI); Since common code used for TSG3 and TSG4 for I2C, this parameter wrongly used as u8. TSG3 does not access beyond 255 bytes but TSG4 may. Tested-on:TMA3XX DVB && TMA4XX DVB Signed-off-by: Ferruh Yigit <fery@cypress.com> Acked-by: Javier Martinez Canillas <javier@dowhile0.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
|
|
* cyttsp_i2c_common.c
|
|
* Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
|
|
* For use with Cypress Txx3xx and Txx4xx parts.
|
|
* Supported parts include:
|
|
* CY8CTST341
|
|
* CY8CTMA340
|
|
* TMA4XX
|
|
* TMA1036
|
|
*
|
|
* 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.
|
|
*
|
|
* Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
|
|
*
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/export.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
|
|
int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
|
|
u16 addr, u8 length, void *values)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
u8 client_addr = client->addr | ((addr >> 8) & 0x1);
|
|
u8 addr_lo = addr & 0xFF;
|
|
struct i2c_msg msgs[] = {
|
|
{
|
|
.addr = client_addr,
|
|
.flags = 0,
|
|
.len = 1,
|
|
.buf = &addr_lo,
|
|
},
|
|
{
|
|
.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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
|
|
|
|
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
|
|
u16 addr, u8 length, const void *values)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
u8 client_addr = client->addr | ((addr >> 8) & 0x1);
|
|
u8 addr_lo = addr & 0xFF;
|
|
struct i2c_msg msgs[] = {
|
|
{
|
|
.addr = client_addr,
|
|
.flags = 0,
|
|
.len = length + 1,
|
|
.buf = xfer_buf,
|
|
},
|
|
};
|
|
int retval;
|
|
|
|
xfer_buf[0] = addr_lo;
|
|
memcpy(&xfer_buf[1], values, length);
|
|
|
|
retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Cypress");
|