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Input: cyttsp - I2C driver split into two modules

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Existing I2C code is for TrueTouch Gen3 devices

TrueTouch Gen4 device is using same protocol, will split driver into
two pieces to use common code with both drivers.

Read/Write functions parameter list modified, since shared code will
be used by two separate drivers and these drivers are not sharing same
structs, parameters updated to use common structures.

Signed-off-by: Ferruh Yigit <fery@cypress.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ferruh Yigit 2013-06-30 18:46:56 -07:00 committed by Dmitry Torokhov
parent b56ece9a3a
commit 9664877ed8
6 changed files with 112 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/input/touchscreen/Makefile
View File

@ -18,7 +18,7 @@ obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR) += auo-pixcir-ts.o
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o cyttsp_i2c_common.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o
obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o
obj-$(CONFIG_TOUCHSCREEN_DA9052) += da9052_tsi.o

6
drivers/input/touchscreen/cyttsp_core.c
View File

@ -84,7 +84,8 @@ static int ttsp_read_block_data(struct cyttsp *ts, u8 command,
int tries;
for (tries = 0; tries < CY_NUM_RETRY; tries++) {
error = ts->bus_ops->read(ts, command, length, buf);
error = ts->bus_ops->read(ts->dev, ts->xfer_buf, command,
length, buf);
if (!error)
return 0;
@ -101,7 +102,8 @@ static int ttsp_write_block_data(struct cyttsp *ts, u8 command,
int tries;
for (tries = 0; tries < CY_NUM_RETRY; tries++) {
error = ts->bus_ops->write(ts, command, length, buf);
error = ts->bus_ops->write(ts->dev, ts->xfer_buf, command,
length, buf);
if (!error)
return 0;

11
drivers/input/touchscreen/cyttsp_core.h
View File

@ -112,9 +112,10 @@ struct cyttsp;
struct cyttsp_bus_ops {
u16 bustype;
int (*write)(struct cyttsp *ts,
u8 addr, u8 length, const void *values);
int (*read)(struct cyttsp *ts, u8 addr, u8 length, void *values);
int (*write)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
const void *values);
int (*read)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
void *values);
};
enum cyttsp_state {
@ -144,6 +145,10 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
struct device *dev, int irq, size_t xfer_buf_size);
void cyttsp_remove(struct cyttsp *ts);
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
u8 length, const void *values);
int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
u8 length, void *values);
extern const struct dev_pm_ops cyttsp_pm_ops;
#endif /* __CYTTSP_CORE_H__ */

50
drivers/input/touchscreen/cyttsp_i2c.c
View File

@ -1,5 +1,5 @@
/*
* Source for:
* cyttsp_i2c.c
* Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
* For use with Cypress Txx3xx parts.
* Supported parts include:
@ -19,11 +19,7 @@
* 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>
* Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
*
*/
@ -34,47 +30,6 @@
#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,
@ -98,7 +53,6 @@ static int cyttsp_i2c_probe(struct i2c_client *client,
return PTR_ERR(ts);
i2c_set_clientdata(client, ts);
return 0;
}

79
drivers/input/touchscreen/cyttsp_i2c_common.c Normal file
View File

@ -0,0 +1,79 @@
/*
* 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,
u8 addr, u8 length, void *values)
{
struct i2c_client *client = to_i2c_client(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;
}
EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
u8 addr, u8 length, const void *values)
{
struct i2c_client *client = to_i2c_client(dev);
int retval;
xfer_buf[0] = addr;
memcpy(&xfer_buf[1], values, length);
retval = i2c_master_send(client, xfer_buf, length + 1);
return retval < 0 ? retval : 0;
}
EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cypress");

38
drivers/input/touchscreen/cyttsp_spi.c
View File

@ -8,6 +8,7 @@
*
* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
* Copyright (C) 2013 Cypress Semiconductor
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@ -19,11 +20,7 @@
* 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>
* Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
*
*/
@ -43,19 +40,19 @@
#define CY_SPI_DATA_BUF_SIZE (CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
#define CY_SPI_BITS_PER_WORD 8
static int cyttsp_spi_xfer(struct cyttsp *ts,
static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
u8 op, u8 reg, u8 *buf, int length)
{
struct spi_device *spi = to_spi_device(ts->dev);
struct spi_device *spi = to_spi_device(dev);
struct spi_message msg;
struct spi_transfer xfer[2];
u8 *wr_buf = &ts->xfer_buf[0];
u8 *rd_buf = &ts->xfer_buf[CY_SPI_DATA_BUF_SIZE];
u8 *wr_buf = &xfer_buf[0];
u8 *rd_buf = &xfer_buf[CY_SPI_DATA_BUF_SIZE];
int retval;
int i;
if (length > CY_SPI_DATA_SIZE) {
dev_err(ts->dev, "%s: length %d is too big.\n",
dev_err(dev, "%s: length %d is too big.\n",
__func__, length);
return -EINVAL;
}
@ -95,13 +92,13 @@ static int cyttsp_spi_xfer(struct cyttsp *ts,
break;
default:
dev_err(ts->dev, "%s: bad operation code=%d\n", __func__, op);
dev_err(dev, "%s: bad operation code=%d\n", __func__, op);
return -EINVAL;
}
retval = spi_sync(spi, &msg);
if (retval < 0) {
dev_dbg(ts->dev, "%s: spi_sync() error %d, len=%d, op=%d\n",
dev_dbg(dev, "%s: spi_sync() error %d, len=%d, op=%d\n",
__func__, retval, xfer[1].len, op);
/*
@ -113,14 +110,13 @@ static int cyttsp_spi_xfer(struct cyttsp *ts,
if (rd_buf[CY_SPI_SYNC_BYTE] != CY_SPI_SYNC_ACK1 ||
rd_buf[CY_SPI_SYNC_BYTE + 1] != CY_SPI_SYNC_ACK2) {
dev_dbg(ts->dev, "%s: operation %d failed\n", __func__, op);
dev_dbg(dev, "%s: operation %d failed\n", __func__, op);
for (i = 0; i < CY_SPI_CMD_BYTES; i++)
dev_dbg(ts->dev, "%s: test rd_buf[%d]:0x%02x\n",
dev_dbg(dev, "%s: test rd_buf[%d]:0x%02x\n",
__func__, i, rd_buf[i]);
for (i = 0; i < length; i++)
dev_dbg(ts->dev, "%s: test buf[%d]:0x%02x\n",
dev_dbg(dev, "%s: test buf[%d]:0x%02x\n",
__func__, i, buf[i]);
return -EIO;
@ -129,16 +125,18 @@ static int cyttsp_spi_xfer(struct cyttsp *ts,
return 0;
}
static int cyttsp_spi_read_block_data(struct cyttsp *ts,
static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
u8 addr, u8 length, void *data)
{
return cyttsp_spi_xfer(ts, CY_SPI_RD_OP, addr, data, length);
return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_RD_OP, addr, data,
length);
}
static int cyttsp_spi_write_block_data(struct cyttsp *ts,
static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf,
u8 addr, u8 length, const void *data)
{
return cyttsp_spi_xfer(ts, CY_SPI_WR_OP, addr, (void *)data, length);
return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data,
length);
}
static const struct cyttsp_bus_ops cyttsp_spi_bus_ops = {