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Re: [PATCH v6] Touchscreen driver for FT5x06 based EDT displays | |
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Hi Simon,
On Sat, Jun 23, 2012 at 01:48:18AM +0200, simon.budig@xxxxxxxxxxxxxxxxx wrote:
> From: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx>
>
> This is a driver for the EDT "Polytouch" family of touch controllers
> based on the FocalTech FT5x06 line of chips.
>
This looks good to me. Henrik, are you OK with MT-B handling?
Thanks.
> Signed-off-by: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx>
> ---
> Documentation/input/edt-ft5x06.txt | 49 ++
> drivers/input/touchscreen/Kconfig | 13 +
> drivers/input/touchscreen/Makefile | 1 +
> drivers/input/touchscreen/edt-ft5x06.c | 783 ++++++++++++++++++++++++++++++++
> include/linux/input/edt-ft5x06.h | 17 +
> 5 files changed, 863 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/input/edt-ft5x06.txt
> create mode 100644 drivers/input/touchscreen/edt-ft5x06.c
> create mode 100644 include/linux/input/edt-ft5x06.h
>
> diff --git a/Documentation/input/edt-ft5x06.txt b/Documentation/input/edt-ft5x06.txt
> new file mode 100644
> index 0000000..4fc44fe
> --- /dev/null
> +++ b/Documentation/input/edt-ft5x06.txt
> @@ -0,0 +1,49 @@
> +EDT ft5x06 based Polytouch devices
> +----------------------------------
> +
> +The edt-ft5x06 driver is useful for the EDT "Polytouch" family of capacitive
> +touch screens. Note that it is *not* suitable for other devices based on the
> +focaltec ft5x06 devices, since they contain vendor-specific firmware. In
> +particular this driver is not suitable for the Nook tablet.
> +
> +It has been tested with the following devices:
> + * EP0350M06
> + * EP0430M06
> + * EP0570M06
> + * EP0700M06
> +
> +The driver allows configuration of the touch screen via a set of sysfs files:
> +
> +/sys/class/input/eventX/device/device/threshold:
> + allows setting the "click"-threshold in the range from 20 to 80.
> +
> +/sys/class/input/eventX/device/device/gain:
> + allows setting the sensitivity in the range from 0 to 31. Note that
> + lower values indicate higher sensitivity.
> +
> +/sys/class/input/eventX/device/device/offset:
> + allows setting the edge compensation in the range from 0 to 31.
> +
> +/sys/class/input/eventX/device/device/report_rate:
> + allows setting the report rate in the range from 3 to 14.
> +
> +
> +The touch screens have a "factory mode" that allows access to the raw sensor
> +data. However, the above mentioned settings are not available in this mode.
> +In particular this limits the use of the raw data for tuning the parameters
> +to a specific setup. Also the scan rate of the touch screen changes compared
> +to the regular operation mode.
> +
> +To access the raw data switch to factory mode:
> + echo 1 > /sys/class/input/eventX/device/device/mode
> +
> +then read out the "raw_data" file. It contains X*Y big endian 16 bit values
> +where X and Y are the number of sensor fields of the touch glass. These values
> +are model specific and get be determined by dividing maximum x and y
> +coordinate by 64.
> +
> +Note that reading raw_data gives a I/O error when the device is not in factory
> +mode. The same happens when reading/writing to the parameter files when the
> +device is not in regular operation mode.
> +
> +
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 98d2635..2008d72 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -460,6 +460,19 @@ config TOUCHSCREEN_PENMOUNT
> To compile this driver as a module, choose M here: the
> module will be called penmount.
>
> +config TOUCHSCREEN_EDT_FT5X06
> + tristate "EDT FocalTech FT5x06 I2C Touchscreen support"
> + depends on I2C
> + help
> + Say Y here if you have an EDT "Polytouch" touchscreen based
> + on the FocalTech FT5x06 family of controllers connected to
> + your system.
> +
> + If unsure, say N.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called edt-ft5x06.
> +
> config TOUCHSCREEN_MIGOR
> tristate "Renesas MIGO-R touchscreen"
> depends on SH_MIGOR && I2C
> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
> index eb8bfe1..bed430d7 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -24,6 +24,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o
> obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o
> obj-$(CONFIG_TOUCHSCREEN_DA9052) += da9052_tsi.o
> obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o
> +obj-$(CONFIG_TOUCHSCREEN_EDT_FT5X06) += edt-ft5x06.o
> obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o
> obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o
> obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o
> diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
> new file mode 100644
> index 0000000..f69d87b
> --- /dev/null
> +++ b/drivers/input/touchscreen/edt-ft5x06.c
> @@ -0,0 +1,783 @@
> +/*
> + * Copyright (C) 2011 Simon Budig, <simon.budig@xxxxxxxxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * 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 library; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +/*
> + * This is a driver for the EDT "Polytouch" family of touch controllers
> + * based on the FocalTech FT5x06 line of chips.
> + *
> + * Development of this driver has been sponsored by Glyn:
> + * http://www.glyn.com/Products/Displays
> + */
> +
> +#include <linux/module.h>
> +#include <linux/interrupt.h>
> +#include <linux/input.h>
> +#include <linux/i2c.h>
> +#include <linux/uaccess.h>
> +#include <linux/delay.h>
> +#include <linux/slab.h>
> +#include <linux/gpio.h>
> +#include <linux/input/mt.h>
> +#include <linux/input/edt-ft5x06.h>
> +
> +#define DRIVER_VERSION "v0.7"
> +
> +#define MAX_SUPPORT_POINTS 5
> +
> +#define WORK_REGISTER_THRESHOLD 0x00
> +#define WORK_REGISTER_REPORT_RATE 0x08
> +#define WORK_REGISTER_GAIN 0x30
> +#define WORK_REGISTER_OFFSET 0x31
> +#define WORK_REGISTER_NUM_X 0x33
> +#define WORK_REGISTER_NUM_Y 0x34
> +
> +#define WORK_REGISTER_OPMODE 0x3c
> +#define FACTORY_REGISTER_OPMODE 0x01
> +
> +#define TOUCH_EVENT_DOWN 0x00
> +#define TOUCH_EVENT_UP 0x01
> +#define TOUCH_EVENT_ON 0x02
> +#define TOUCH_EVENT_RESERVED 0x03
> +
> +#define EDT_NAME_LEN 23
> +#define EDT_SWITCH_MODE_RETRIES 10
> +#define EDT_SWITCH_MODE_DELAY 5 /* msec */
> +#define EDT_RAW_DATA_RETRIES 100
> +#define EDT_RAW_DATA_DELAY 1 /* msec */
> +
> +struct edt_ft5x06_i2c_ts_data {
> + struct i2c_client *client;
> + struct input_dev *input;
> + int num_x;
> + int num_y;
> +
> + struct mutex mutex;
> + bool factory_mode;
> + int threshold;
> + int gain;
> + int offset;
> + int report_rate;
> +
> + char name[EDT_NAME_LEN];
> +};
> +
> +static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
> + u16 wr_len, u8 *wr_buf,
> + u16 rd_len, u8 *rd_buf)
> +{
> + struct i2c_msg wrmsg[2];
> + int i = 0;
> + int ret;
> +
> + i = 0;
> + if (wr_len) {
> + wrmsg[i].addr = client->addr;
> + wrmsg[i].flags = 0;
> + wrmsg[i].len = wr_len;
> + wrmsg[i].buf = wr_buf;
> + i++;
> + }
> + if (rd_len) {
> + wrmsg[i].addr = client->addr;
> + wrmsg[i].flags = I2C_M_RD;
> + wrmsg[i].len = rd_len;
> + wrmsg[i].buf = rd_buf;
> + i++;
> + }
> +
> + ret = i2c_transfer(client->adapter, wrmsg, i);
> + if (ret < 0)
> + return ret;
> + if (ret != i)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
> +{
> + struct edt_ft5x06_i2c_ts_data *tsdata = dev_id;
> + u8 cmd = 0xf9;
> + u8 rdbuf[26];
> + int i, type, x, y, id;
> + int error;
> +
> + memset(rdbuf, 0, sizeof(rdbuf));
> +
> + error = edt_ft5x06_ts_readwrite(tsdata->client,
> + sizeof(cmd), &cmd,
> + sizeof(rdbuf), rdbuf);
> + if (error) {
> + dev_err(&tsdata->client->dev,
> + "Unable to write to fetch data, error: %d\n", error);
> + goto out;
> + }
> +
> + if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
> + dev_err(&tsdata->client->dev,
> + "Unexpected header: %02x%02x%02x!\n",
> + rdbuf[0], rdbuf[1], rdbuf[2]);
> + goto out;
> + }
> +
> + for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
> + u8 *buf = &rdbuf[i * 4];
> + bool down;
> +
> + type = buf[5] >> 6;
> + /* ignore Reserved events */
> + if (type == TOUCH_EVENT_RESERVED)
> + continue;
> +
> + x = ((buf[5] << 8) | buf[6]) & 0x0fff;
> + y = ((buf[7] << 8) | buf[8]) & 0x0fff;
> + id = (buf[7] >> 4) & 0x0f;
> + down = (type != TOUCH_EVENT_UP);
> +
> + input_mt_slot(tsdata->input, id);
> + input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
> +
> + if (!down)
> + continue;
> +
> + input_report_abs(tsdata->input, ABS_MT_POSITION_X, x);
> + input_report_abs(tsdata->input, ABS_MT_POSITION_Y, y);
> + }
> +
> + input_mt_report_pointer_emulation(tsdata->input, true);
> + input_sync(tsdata->input);
> +
> +out:
> + return IRQ_HANDLED;
> +}
> +
> +static int edt_ft5x06_i2c_register_write(struct edt_ft5x06_i2c_ts_data *tsdata,
> + u8 addr, u8 value)
> +{
> + u8 wrbuf[4];
> +
> + wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
> + wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
> + wrbuf[2] = value;
> + wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
> +
> + return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
> +}
> +
> +static int edt_ft5x06_i2c_register_read(struct edt_ft5x06_i2c_ts_data *tsdata,
> + u8 addr)
> +{
> + u8 wrbuf[2], rdbuf[2];
> + int error;
> +
> + wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
> + wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
> + wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
> +
> + error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
> + if (error)
> + return error;
> +
> + if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
> + dev_err(&tsdata->client->dev,
> + "crc error: 0x%02x expected, got 0x%02x\n",
> + wrbuf[0] ^ wrbuf[1] ^ rdbuf[0], rdbuf[1]);
> + return -EIO;
> + }
> +
> + return rdbuf[0];
> +}
> +
> +struct edt_ft5x06_attribute {
> + struct device_attribute dattr;
> + size_t field_offset;
> + u8 limit_low;
> + u8 limit_high;
> + u8 addr;
> +};
> +
> +#define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high) \
> + struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = { \
> + .dattr = __ATTR(_field, _mode, \
> + edt_ft5x06_i2c_setting_show, \
> + edt_ft5x06_i2c_setting_store), \
> + .field_offset = \
> + offsetof(struct edt_ft5x06_i2c_ts_data, _field),\
> + .limit_low = _limit_low, \
> + .limit_high = _limit_high, \
> + .addr = _addr, \
> + }
> +
> +static ssize_t edt_ft5x06_i2c_setting_show(struct device *dev,
> + struct device_attribute *dattr,
> + char *buf)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> + struct edt_ft5x06_attribute *attr =
> + container_of(dattr, struct edt_ft5x06_attribute, dattr);
> + u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
> + int val;
> + size_t count = 0;
> + int error = 0;
> +
> + mutex_lock(&tsdata->mutex);
> +
> + if (tsdata->factory_mode) {
> + error = -EIO;
> + goto out;
> + }
> +
> + val = edt_ft5x06_i2c_register_read(tsdata, attr->addr);
> + if (val < 0) {
> + error = val;
> + dev_err(&tsdata->client->dev,
> + "Failed to fetch attribute %s, error %d\n",
> + dattr->attr.name, error);
> + goto out;
> + }
> +
> + if (val != *field) {
> + dev_warn(&tsdata->client->dev,
> + "%s: read (%d) and stored value (%d) differ\n",
> + dattr->attr.name, val, *field);
> + *field = val;
> + }
> +
> + count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
> +out:
> + mutex_unlock(&tsdata->mutex);
> + return error ?: count;
> +}
> +
> +static ssize_t edt_ft5x06_i2c_setting_store(struct device *dev,
> + struct device_attribute *dattr,
> + const char *buf, size_t count)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> + struct edt_ft5x06_attribute *attr =
> + container_of(dattr, struct edt_ft5x06_attribute, dattr);
> + u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
> + unsigned int val;
> + int error;
> +
> + mutex_lock(&tsdata->mutex);
> +
> + if (tsdata->factory_mode) {
> + error = -EIO;
> + goto out;
> + }
> +
> + error = kstrtouint(buf, 0, &val);
> + if (error)
> + goto out;
> +
> + if (val < attr->limit_low || val > attr->limit_high) {
> + error = -ERANGE;
> + goto out;
> + }
> +
> + error = edt_ft5x06_i2c_register_write(tsdata, attr->addr, val);
> + if (error) {
> + dev_err(&tsdata->client->dev,
> + "Failed to update attribute %s, error: %d\n",
> + dattr->attr.name, error);
> + goto out;
> + }
> +
> + *field = val;
> +
> +out:
> + mutex_unlock(&tsdata->mutex);
> + return error ?: count;
> +}
> +
> +static ssize_t edt_ft5x06_i2c_mode_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> +
> + return sprintf(buf, "%d\n", tsdata->factory_mode);
> +}
> +
> +static int edt_ft5x06_i2c_factory_mode(struct edt_ft5x06_i2c_ts_data *tsdata)
> +{
> + int retries = EDT_SWITCH_MODE_RETRIES;
> + int ret;
> + int error;
> +
> + disable_irq(tsdata->client->irq);
> +
> + /* mode register is 0x3c when in the work mode */
> + error = edt_ft5x06_i2c_register_write(tsdata,
> + WORK_REGISTER_OPMODE, 0x03);
> + if (error) {
> + dev_err(&tsdata->client->dev,
> + "failed to switch to factory mode, error %d\n",
> + error);
> + goto err_out;
> + }
> +
> + tsdata->factory_mode = true;
> + do {
> + mdelay(EDT_SWITCH_MODE_DELAY);
> + /* mode register is 0x01 when in factory mode */
> + ret = edt_ft5x06_i2c_register_read(tsdata,
> + FACTORY_REGISTER_OPMODE);
> + if (ret == 0x03)
> + break;
> + } while (--retries > 0);
> +
> + if (retries == 0) {
> + dev_err(&tsdata->client->dev,
> + "not in factory mode after %dms.\n",
> + EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
> + error = -EIO;
> + goto err_out;
> + }
> +
> + return 0;
> +
> +err_out:
> + tsdata->factory_mode = false;
> + enable_irq(tsdata->client->irq);
> + return error;
> +}
> +
> +static int edt_ft5x06_i2c_work_mode(struct edt_ft5x06_i2c_ts_data *tsdata)
> +{
> + int retries = EDT_SWITCH_MODE_RETRIES;
> + int ret;
> + int error;
> +
> + /* mode register is 0x01 when in the factory mode */
> + error = edt_ft5x06_i2c_register_write(tsdata,
> + FACTORY_REGISTER_OPMODE, 0x01);
> + if (error) {
> + dev_err(&tsdata->client->dev,
> + "failed to switch to work mode, error: %d\n",
> + error);
> + return error;
> + }
> +
> + tsdata->factory_mode = false;
> +
> + do {
> + mdelay(EDT_SWITCH_MODE_DELAY);
> + /* mode register is 0x01 when in factory mode */
> + ret = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_OPMODE);
> + if (ret == 0x01)
> + break;
> + } while (--retries > 0);
> +
> + if (retries == 0) {
> + dev_err(&tsdata->client->dev,
> + "not in work mode after %dms.\n",
> + EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
> + tsdata->factory_mode = true;
> + return -EIO;
> + }
> +
> + /* restore parameters */
> + edt_ft5x06_i2c_register_write(tsdata,
> + WORK_REGISTER_THRESHOLD,
> + tsdata->threshold);
> + edt_ft5x06_i2c_register_write(tsdata,
> + WORK_REGISTER_GAIN,
> + tsdata->gain);
> + edt_ft5x06_i2c_register_write(tsdata,
> + WORK_REGISTER_OFFSET,
> + tsdata->offset);
> + edt_ft5x06_i2c_register_write(tsdata,
> + WORK_REGISTER_REPORT_RATE,
> + tsdata->report_rate);
> +
> + enable_irq(tsdata->client->irq);
> +
> + return 0;
> +}
> +
> +static ssize_t edt_ft5x06_i2c_mode_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> + unsigned int mode;
> + int error;
> +
> + error = kstrtouint(buf, 0, &mode);
> + if (error)
> + return error;
> +
> + if (mode > 1)
> + return -ERANGE;
> +
> + mutex_lock(&tsdata->mutex);
> +
> + if (mode != tsdata->factory_mode) {
> + error = mode ? edt_ft5x06_i2c_factory_mode(tsdata) :
> + edt_ft5x06_i2c_work_mode(tsdata);
> + }
> +
> + mutex_unlock(&tsdata->mutex);
> + return error ?: count;
> +}
> +
> +static ssize_t edt_ft5x06_i2c_raw_data_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> + int retries = EDT_RAW_DATA_RETRIES;
> + size_t count = 0;
> + int i, ret;
> + int error;
> + char wrbuf[3];
> +
> + /* Make sure we have enough space */
> + if (tsdata->num_x * tsdata->num_y * 2 >= PAGE_SIZE)
> + return -ENOBUFS;
> +
> + mutex_lock(&tsdata->mutex);
> +
> + if (!tsdata->factory_mode) {
> + error = -EIO;
> + goto out;
> + }
> +
> + error = edt_ft5x06_i2c_register_write(tsdata, 0x08, 0x01);
> + if (error) {
> + dev_dbg(dev, "failed to write 0x08 register, error %d\n",
> + error);
> + goto out;
> + }
> +
> + do {
> + msleep(EDT_RAW_DATA_DELAY);
> + ret = edt_ft5x06_i2c_register_read(tsdata, 0x08);
> + if (ret < 1)
> + break;
> + } while (--retries > 0);
> +
> + if (ret < 0) {
> + error = ret;
> + dev_dbg(dev, "failed to read 0x08 register, error %d\n", error);
> + goto out;
> + }
> +
> + if (retries == 0) {
> + dev_dbg(dev, "timed out waiting for register to settle\n");
> + error = -ETIMEDOUT;
> + goto out;
> + }
> +
> + wrbuf[0] = 0xf5;
> + wrbuf[1] = 0x0e;
> + for (i = 0; i < tsdata->num_x; i++) {
> + wrbuf[2] = i;
> + error = edt_ft5x06_ts_readwrite(tsdata->client,
> + sizeof(wrbuf), wrbuf,
> + tsdata->num_y * 2,
> + &buf[count]);
> + if (error)
> + goto out;
> +
> + count += tsdata->num_y * 2;
> + }
> +
> +out:
> + mutex_unlock(&tsdata->mutex);
> + return error ?: count;
> +}
> +
> +static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
> +static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
> +static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
> + WORK_REGISTER_THRESHOLD, 20, 80);
> +static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
> + WORK_REGISTER_REPORT_RATE, 3, 14);
> +
> +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO,
> + edt_ft5x06_i2c_mode_show, edt_ft5x06_i2c_mode_store);
> +static DEVICE_ATTR(raw_data, S_IRUGO, edt_ft5x06_i2c_raw_data_show, NULL);
> +
> +static struct attribute *edt_ft5x06_i2c_attrs[] = {
> + &edt_ft5x06_attr_gain.dattr.attr,
> + &edt_ft5x06_attr_offset.dattr.attr,
> + &edt_ft5x06_attr_threshold.dattr.attr,
> + &edt_ft5x06_attr_report_rate.dattr.attr,
> + &dev_attr_mode.attr,
> + &dev_attr_raw_data.attr,
> + NULL
> +};
> +
> +static const struct attribute_group edt_ft5x06_i2c_attr_group = {
> + .attrs = edt_ft5x06_i2c_attrs,
> +};
> +
> +static int __devinit edt_ft5x06_i2c_ts_reset(struct i2c_client *client,
> + int reset_pin)
> +{
> + int error;
> +
> + if (gpio_is_valid(reset_pin)) {
> + /* this pulls reset down, enabling the low active reset */
> + error = gpio_request_one(reset_pin, GPIOF_OUT_INIT_LOW,
> + "edt-ft5x06 reset");
> + if (error) {
> + dev_err(&client->dev,
> + "Failed to request GPIO %d as reset pin, error %d\n",
> + reset_pin, error);
> + return error;
> + }
> +
> + mdelay(50);
> + gpio_set_value(reset_pin, 1);
> + mdelay(100);
> + }
> +
> + return 0;
> +}
> +
> +static int __devinit edt_ft5x06_i2c_ts_identify(struct i2c_client *client,
> + char *model_name,
> + char *fw_version)
> +{
> + u8 rdbuf[EDT_NAME_LEN];
> + char *p;
> + int error;
> +
> + error = edt_ft5x06_ts_readwrite(client,
> + 1, "\xbb", EDT_NAME_LEN - 1, rdbuf);
> + if (error)
> + return error;
> +
> + /* remove last '$' end marker */
> + rdbuf[EDT_NAME_LEN - 1] = '\0';
> + if (rdbuf[EDT_NAME_LEN - 2] == '$')
> + rdbuf[EDT_NAME_LEN - 2] = '\0';
> +
> + /* look for Model/Version separator */
> + p = strchr(rdbuf, '*');
> + if (p)
> + *p++ = '\0';
> +
> + strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
> + strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
> +
> + return 0;
> +}
> +
> +static int __devinit edt_ft5x06_i2c_ts_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> +
> + const struct edt_ft5x06_platform_data *pdata =
> + client->dev.platform_data;
> + struct edt_ft5x06_i2c_ts_data *tsdata;
> + struct input_dev *input;
> + int error;
> + char fw_version[EDT_NAME_LEN];
> +
> + dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
> +
> + if (!pdata) {
> + dev_err(&client->dev, "no platform data?\n");
> + return -EINVAL;
> + }
> +
> + error = edt_ft5x06_i2c_ts_reset(client, pdata->reset_pin);
> + if (error)
> + return error;
> +
> + if (gpio_is_valid(pdata->irq_pin)) {
> + error = gpio_request_one(pdata->irq_pin,
> + GPIOF_IN, "edt-ft5x06 irq");
> + if (error) {
> + dev_err(&client->dev,
> + "Failed to request GPIO %d, error %d\n",
> + pdata->irq_pin, error);
> + return error;
> + }
> + }
> +
> + tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL);
> + input = input_allocate_device();
> + if (!tsdata || !input) {
> + dev_err(&client->dev, "failed to allocate driver data.\n");
> + error = -ENOMEM;
> + goto err_free_mem;
> + }
> +
> + mutex_init(&tsdata->mutex);
> + tsdata->client = client;
> + tsdata->input = input;
> + tsdata->factory_mode = false;
> +
> + error = edt_ft5x06_i2c_ts_identify(client, tsdata->name, fw_version);
> + if (error) {
> + dev_err(&client->dev, "touchscreen probe failed\n");
> + goto err_free_mem;
> + }
> +
> + tsdata->threshold = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_THRESHOLD);
> + tsdata->gain = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_GAIN);
> + tsdata->offset = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_OFFSET);
> + tsdata->report_rate = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_REPORT_RATE);
> + tsdata->num_x = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_NUM_X);
> + tsdata->num_y = edt_ft5x06_i2c_register_read(tsdata,
> + WORK_REGISTER_NUM_Y);
> +
> + dev_dbg(&client->dev,
> + "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
> + tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
> +
> + input->name = tsdata->name;
> + input->id.bustype = BUS_I2C;
> + input->dev.parent = &client->dev;
> +
> + __set_bit(EV_SYN, input->evbit);
> + __set_bit(EV_KEY, input->evbit);
> + __set_bit(EV_ABS, input->evbit);
> + __set_bit(BTN_TOUCH, input->keybit);
> + input_set_abs_params(input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
> + input_set_abs_params(input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
> + input_set_abs_params(input, ABS_MT_POSITION_X,
> + 0, tsdata->num_x * 64 - 1, 0, 0);
> + input_set_abs_params(input, ABS_MT_POSITION_Y,
> + 0, tsdata->num_y * 64 - 1, 0, 0);
> + input_mt_init_slots(input, MAX_SUPPORT_POINTS);
> +
> + input_set_drvdata(input, tsdata);
> + i2c_set_clientdata(client, tsdata);
> +
> + error = request_threaded_irq(client->irq, NULL, edt_ft5x06_ts_isr,
> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> + client->name, tsdata);
> + if (error) {
> + dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
> + goto err_free_mem;
> + }
> +
> + error = sysfs_create_group(&client->dev.kobj,
> + &edt_ft5x06_i2c_attr_group);
> + if (error)
> + goto err_free_irq;
> +
> + error = input_register_device(input);
> + if (error)
> + goto err_remove_attrs;
> +
> + device_init_wakeup(&client->dev, 1);
> +
> + dev_dbg(&tsdata->client->dev,
> + "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
> + pdata->irq_pin, pdata->reset_pin);
> +
> + return 0;
> +
> +err_remove_attrs:
> + sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_i2c_attr_group);
> +err_free_irq:
> + free_irq(client->irq, tsdata);
> +err_free_mem:
> + input_free_device(input);
> + kfree(tsdata);
> +
> + if (gpio_is_valid(pdata->irq_pin))
> + gpio_free(pdata->irq_pin);
> +
> + return error;
> +}
> +
> +static int __devexit edt_ft5x06_i2c_ts_remove(struct i2c_client *client)
> +{
> + const struct edt_ft5x06_platform_data *pdata =
> + client->dev.platform_data;
> + struct edt_ft5x06_i2c_ts_data *tsdata = i2c_get_clientdata(client);
> +
> + sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_i2c_attr_group);
> +
> + free_irq(client->irq, tsdata);
> + input_unregister_device(tsdata->input);
> + if (gpio_is_valid(pdata->irq_pin))
> + gpio_free(pdata->irq_pin);
> + if (gpio_is_valid(pdata->reset_pin))
> + gpio_free(pdata->reset_pin);
> + kfree(tsdata);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int edt_ft5x06_i2c_ts_suspend(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> +
> + if (device_may_wakeup(dev))
> + enable_irq_wake(client->irq);
> +
> + return 0;
> +}
> +
> +static int edt_ft5x06_i2c_ts_resume(struct device *dev)
> +{
> + struct i2c_client *client = to_i2c_client(dev);
> +
> + if (device_may_wakeup(dev))
> + disable_irq_wake(client->irq);
> +
> + return 0;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(edt_ft5x06_i2c_ts_pm_ops,
> + edt_ft5x06_i2c_ts_suspend, edt_ft5x06_i2c_ts_resume);
> +
> +static const struct i2c_device_id edt_ft5x06_i2c_ts_id[] = {
> + { "edt-ft5x06", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, edt_ft5x06_i2c_ts_id);
> +
> +static struct i2c_driver edt_ft5x06_i2c_ts_driver = {
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = "edt_ft5x06_i2c",
> + .pm = &edt_ft5x06_i2c_ts_pm_ops,
> + },
> + .id_table = edt_ft5x06_i2c_ts_id,
> + .probe = edt_ft5x06_i2c_ts_probe,
> + .remove = __devexit_p(edt_ft5x06_i2c_ts_remove),
> +};
> +
> +module_i2c_driver(edt_ft5x06_i2c_ts_driver);
> +
> +MODULE_AUTHOR("Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/input/edt-ft5x06.h b/include/linux/input/edt-ft5x06.h
> new file mode 100644
> index 0000000..db4130d
> --- /dev/null
> +++ b/include/linux/input/edt-ft5x06.h
> @@ -0,0 +1,17 @@
> +#ifndef _EDT_FT5X06_H
> +#define _EDT_FT5X06_H
> +
> +/*
> + * Copyright (c) 2011 Simon Budig, <simon.budig@xxxxxxxxxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + */
> +
> +struct edt_ft5x06_platform_data {
> + int irq_pin;
> + int reset_pin;
> +};
> +
> +#endif /* _EDT_FT5X06_H */
> --
> 1.7.2.5
>
--
Dmitry
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