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. Signed-off-by: Simon Budig <simon.budig@xxxxxxxxxxxxxxxxx> --- drivers/input/touchscreen/Kconfig | 13 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/edt-ft5x06.c | 771 ++++++++++++++++++++++++++++++++ include/linux/input/edt-ft5x06.h | 17 + 4 files changed, 802 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/edt-ft5x06.c create mode 100644 include/linux/input/edt-ft5x06.h diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 2a21419..0166a15 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -431,6 +431,19 @@ 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 3d5cf8c..8a68c84 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI) += cyttsp_spi.o obj-$(CONFIG_TOUCHSCREEN_DA9034) += da9034-ts.o obj-$(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..7c4f9f5 --- /dev/null +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -0,0 +1,771 @@ +/* + * 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/edt-ft5x06.h> + +#define DRIVER_VERSION "v0.5" + +#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 + +struct edt_ft5x06_i2c_ts_data { + struct i2c_client *client; + struct input_dev *input; + int irq; + int irq_pin; + int reset_pin; + int num_x; + int num_y; + + struct mutex mutex; + bool factory_mode; + int threshold; + int gain; + int offset; + int report_rate; +}; + +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, 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) { + dev_err(&client->dev, "i2c_transfer failed: %d\n", ret); + return ret; + } + + return ret; +} + + +static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_id; + unsigned char touching = 0; + unsigned char rdbuf[26], wrbuf[1]; + int i, have_abs, type, ret; + + memset(wrbuf, 0, sizeof(wrbuf)); + memset(rdbuf, 0, sizeof(rdbuf)); + + wrbuf[0] = 0xf9; + + mutex_lock(&tsdata->mutex); + ret = edt_ft5x06_ts_readwrite(tsdata->client, + 1, wrbuf, + sizeof(rdbuf), rdbuf); + mutex_unlock(&tsdata->mutex); + if (ret < 0) { + dev_err(&tsdata->client->dev, + "Unable to write to i2c touchscreen!\n"); + 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]); + } + + have_abs = 0; + touching = rdbuf[3]; + for (i = 0; i < touching; i++) { + type = rdbuf[i*4+5] >> 6; + /* ignore Touch Down and Reserved events */ + if (type == 0x01 || type == 0x03) + continue; + + if (!have_abs) { + input_report_key(tsdata->input, BTN_TOUCH, 1); + input_report_abs(tsdata->input, ABS_PRESSURE, 1); + input_report_abs(tsdata->input, ABS_X, + ((rdbuf[i*4+5] << 8) | + rdbuf[i*4+6]) & 0x0fff); + input_report_abs(tsdata->input, ABS_Y, + ((rdbuf[i*4+7] << 8) | + rdbuf[i*4+8]) & 0x0fff); + have_abs = 1; + } + input_report_abs(tsdata->input, ABS_MT_POSITION_X, + ((rdbuf[i*4+5] << 8) | rdbuf[i*4+6]) & 0x0fff); + input_report_abs(tsdata->input, ABS_MT_POSITION_Y, + ((rdbuf[i*4+7] << 8) | rdbuf[i*4+8]) & 0x0fff); + input_report_abs(tsdata->input, ABS_MT_TRACKING_ID, + (rdbuf[i*4+7] >> 4) & 0x0f); + input_mt_sync(tsdata->input); + } + if (!have_abs) { + input_report_key(tsdata->input, BTN_TOUCH, 0); + input_report_abs(tsdata->input, ABS_PRESSURE, 0); + } + 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]; + int ret; + + 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]; + + disable_irq(tsdata->irq); + + ret = edt_ft5x06_ts_readwrite(tsdata->client, + 4, wrbuf, + 0, NULL); + + enable_irq(tsdata->irq); + + return ret; +} + +static int edt_ft5x06_i2c_register_read(struct edt_ft5x06_i2c_ts_data *tsdata, + u8 addr) +{ + u8 wrbuf[2], rdbuf[2]; + int ret; + + wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc; + wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f; + wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40; + + disable_irq(tsdata->irq); + + ret = edt_ft5x06_ts_readwrite(tsdata->client, + 2, wrbuf, + 2, rdbuf); + + enable_irq(tsdata->irq); + + 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 ret < 0 ? ret : rdbuf[0]; +} + +static ssize_t edt_ft5x06_i2c_setting_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + struct i2c_client *client = tsdata->client; + int ret = 0; + int *value; + u8 addr; + + switch (attr->attr.name[0]) { + case 't': /* threshold */ + addr = WORK_REGISTER_THRESHOLD; + value = &tsdata->threshold; + break; + case 'g': /* gain */ + addr = WORK_REGISTER_GAIN; + value = &tsdata->gain; + break; + case 'o': /* offset */ + addr = WORK_REGISTER_OFFSET; + value = &tsdata->offset; + break; + case 'r': /* report rate */ + addr = WORK_REGISTER_REPORT_RATE; + value = &tsdata->report_rate; + break; + default: + dev_err(&client->dev, + "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n", + attr->attr.name); + return -EINVAL; + } + + mutex_lock(&tsdata->mutex); + + if (tsdata->factory_mode) { + dev_err(dev, + "setting register not available in factory mode\n"); + mutex_unlock(&tsdata->mutex); + return -EIO; + } + + ret = edt_ft5x06_i2c_register_read(tsdata, addr); + if (ret < 0) { + dev_err(&tsdata->client->dev, + "Unable to write to i2c touchscreen!\n"); + mutex_unlock(&tsdata->mutex); + return ret; + } + mutex_unlock(&tsdata->mutex); + + if (ret != *value) { + dev_info(&tsdata->client->dev, + "i2c read (%d) and stored value (%d) differ. Huh?\n", + ret, *value); + *value = ret; + } + + return sprintf(buf, "%d\n", ret); +} + +static ssize_t edt_ft5x06_i2c_setting_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + struct i2c_client *client = tsdata->client; + int ret = 0; + u8 addr; + unsigned int val; + + mutex_lock(&tsdata->mutex); + + if (tsdata->factory_mode) { + dev_err(dev, + "setting register not available in factory mode\n"); + ret = -EIO; + goto out; + } + + if (sscanf(buf, "%u", &val) != 1) { + dev_err(dev, "Invalid value for attribute %s\n", + attr->attr.name); + ret = -EINVAL; + goto out; + } + + switch (attr->attr.name[0]) { + case 't': /* threshold */ + addr = WORK_REGISTER_THRESHOLD; + val = val < 20 ? 20 : val > 80 ? 80 : val; + tsdata->threshold = val; + break; + case 'g': /* gain */ + addr = WORK_REGISTER_GAIN; + val = val < 0 ? 0 : val > 31 ? 31 : val; + tsdata->gain = val; + break; + case 'o': /* offset */ + addr = WORK_REGISTER_OFFSET; + val = val < 0 ? 0 : val > 31 ? 31 : val; + tsdata->offset = val; + break; + case 'r': /* report rate */ + addr = WORK_REGISTER_REPORT_RATE; + val = val < 3 ? 3 : val > 14 ? 14 : val; + tsdata->report_rate = val; + break; + default: + dev_err(&client->dev, + "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n", + attr->attr.name); + ret = -EINVAL; + goto out; + } + + ret = edt_ft5x06_i2c_register_write(tsdata, addr, val); + + if (ret < 0) { + dev_err(&tsdata->client->dev, + "Unable to write to i2c touchscreen!\n"); + goto out; + } + +out: + mutex_unlock(&tsdata->mutex); + return ret < 0 ? ret : count; +} + + +static ssize_t edt_ft5x06_i2c_mode_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", tsdata->factory_mode ? 1 : 0); +} + +static ssize_t edt_ft5x06_i2c_mode_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + int i, ret = 0; + unsigned int mode; + + if (sscanf(buf, "%u", &mode) != 1 || (mode | 1) != 1) { + dev_err(dev, "Invalid value for operation mode\n"); + return -EINVAL; + } + + /* no change, return without doing anything */ + if (mode == tsdata->factory_mode) + return count; + + mutex_lock(&tsdata->mutex); + if (!tsdata->factory_mode) { /* switch to factory mode */ + disable_irq(tsdata->irq); + /* mode register is 0x3c when in the work mode */ + ret = edt_ft5x06_i2c_register_write(tsdata, + WORK_REGISTER_OPMODE, 0x03); + if (ret < 0) { + dev_err(dev, "failed to switch to factory mode (%d)\n", + ret); + } else { + tsdata->factory_mode = 1; + for (i = 0; i < 10; i++) { + mdelay(5); + /* mode register is 0x01 when in factory mode */ + ret = edt_ft5x06_i2c_register_read(tsdata, FACTORY_REGISTER_OPMODE); + if (ret == 0x03) + break; + } + if (i == 10) + dev_err(dev, + "not in factory mode after %dms.\n", + i*5); + } + } else { /* switch to work mode */ + /* mode register is 0x01 when in the factory mode */ + ret = edt_ft5x06_i2c_register_write(tsdata, + FACTORY_REGISTER_OPMODE, + 0x01); + if (ret < 0) { + dev_err(dev, "failed to switch to work mode (%d)\n", + ret); + } else { + tsdata->factory_mode = 0; + for (i = 0; i < 10; i++) { + mdelay(5); + /* mode register is 0x01 when in factory mode */ + ret = edt_ft5x06_i2c_register_read(tsdata, WORK_REGISTER_OPMODE); + if (ret == 0x01) + break; + } + if (i == 10) + dev_err(dev, "not in work mode after %dms.\n", + i*5); + + /* 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->irq); + } + } + + mutex_unlock(&tsdata->mutex); + return count; +} + + +static ssize_t edt_ft5x06_i2c_raw_data_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + int i, ret; + char *ptr, wrbuf[3]; + + if (!tsdata->factory_mode) { + dev_err(dev, "raw data not available in work mode\n"); + return -EIO; + } + + mutex_lock(&tsdata->mutex); + ret = edt_ft5x06_i2c_register_write(tsdata, 0x08, 0x01); + for (i = 0; i < 100; i++) { + ret = edt_ft5x06_i2c_register_read(tsdata, 0x08); + if (ret < 1) + break; + udelay(1000); + } + + if (i == 100 || ret < 0) { + dev_err(dev, "waiting time exceeded or error: %d\n", ret); + mutex_unlock(&tsdata->mutex); + return ret < 0 ? ret : -ETIMEDOUT; + } + + ptr = buf; + wrbuf[0] = 0xf5; + wrbuf[1] = 0x0e; + for (i = 0; i <= tsdata->num_x; i++) { + wrbuf[2] = i; + ret = edt_ft5x06_ts_readwrite(tsdata->client, + 3, wrbuf, + tsdata->num_y * 2, ptr); + if (ret < 0) { + mutex_unlock(&tsdata->mutex); + return ret; + } + + ptr += tsdata->num_y * 2; + } + + mutex_unlock(&tsdata->mutex); + return ptr - buf; +} + + +static DEVICE_ATTR(gain, 0664, + edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store); +static DEVICE_ATTR(offset, 0664, + edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store); +static DEVICE_ATTR(threshold, 0664, + edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store); +static DEVICE_ATTR(report_rate, 0664, + edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store); +static DEVICE_ATTR(mode, 0664, + edt_ft5x06_i2c_mode_show, edt_ft5x06_i2c_mode_store); +static DEVICE_ATTR(raw_data, 0444, + edt_ft5x06_i2c_raw_data_show, NULL); + +static struct attribute *edt_ft5x06_i2c_attrs[] = { + &dev_attr_gain.attr, + &dev_attr_offset.attr, + &dev_attr_threshold.attr, + &dev_attr_report_rate.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 edt_ft5x06_i2c_ts_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + + struct edt_ft5x06_i2c_ts_data *tsdata; + struct edt_ft5x06_platform_data *pdata; + struct input_dev *input; + int error; + u8 rdbuf[23]; + char *model_name, *fw_version; + + dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n"); + + if (!client->dev.platform_data) { + dev_err(&client->dev, "no platform data?\n"); + return -ENODEV; + } + + tsdata = kzalloc(sizeof(*tsdata), GFP_KERNEL); + if (!tsdata) { + dev_err(&client->dev, "failed to allocate driver data!\n"); + dev_set_drvdata(&client->dev, NULL); + return -ENOMEM; + } + + dev_set_drvdata(&client->dev, tsdata); + tsdata->client = client; + pdata = client->dev.platform_data; + + tsdata->reset_pin = pdata->reset_pin; + mutex_init(&tsdata->mutex); + + if (tsdata->reset_pin >= 0) { + error = gpio_request(tsdata->reset_pin, "edt-ft5x06 reset"); + if (error < 0) { + dev_err(&client->dev, + "Failed to request GPIO %d as reset pin, error %d\n", + tsdata->reset_pin, error); + goto err_free_tsdata; + } + + /* this pulls reset down, enabling the low active reset */ + if (gpio_direction_output(tsdata->reset_pin, 0) < 0) { + dev_info(&client->dev, "switching to output failed\n"); + goto err_free_reset_pin; + } + } + + /* request IRQ pin */ + tsdata->irq_pin = pdata->irq_pin; + tsdata->irq = gpio_to_irq(tsdata->irq_pin); + + error = gpio_request(tsdata->irq_pin, "edt-ft5x06 irq"); + if (error < 0) { + dev_err(&client->dev, + "Failed to request GPIO %d for IRQ %d, error %d\n", + tsdata->irq_pin, tsdata->irq, error); + goto err_free_reset_pin; + } + gpio_direction_input(tsdata->irq_pin); + + if (tsdata->reset_pin >= 0) { + /* release reset */ + mdelay(50); + gpio_set_value(tsdata->reset_pin, 1); + mdelay(100); + } + + mutex_lock(&tsdata->mutex); + + tsdata->factory_mode = 0; + + if (edt_ft5x06_ts_readwrite(client, 1, "\xbb", 22, rdbuf) < 0) { + dev_err(&client->dev, "probing failed\n"); + error = -ENODEV; + goto err_free_irq_pin; + } + + 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); + + mutex_unlock(&tsdata->mutex); + + /* remove last '$' end marker */ + rdbuf[22] = '\0'; + if (rdbuf[21] == '$') + rdbuf[21] = '\0'; + + model_name = rdbuf + 1; + /* look for Model/Version separator */ + fw_version = strchr(rdbuf, '*'); + + if (fw_version) { + fw_version[0] = '\0'; + fw_version++; + dev_info(&client->dev, + "Model \"%s\", Rev. \"%s\", %dx%d sensors\n", + model_name, fw_version, tsdata->num_x, tsdata->num_y); + } else { + dev_info(&client->dev, "Product ID \"%s\"\n", model_name); + } + + input = input_allocate_device(); + if (!input) { + dev_err(&client->dev, "failed to allocate input device!\n"); + error = -ENOMEM; + goto err_free_irq_pin; + } + + __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_PRESSURE, 0, 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_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0); + + input->name = kstrdup(model_name, GFP_NOIO); + input->id.bustype = BUS_I2C; + input->dev.parent = &client->dev; + + input_set_drvdata(input, tsdata); + + tsdata->input = input; + + error = input_register_device(input); + if (error) + goto err_free_input_device; + + if (request_threaded_irq(tsdata->irq, NULL, edt_ft5x06_ts_isr, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + client->name, tsdata)) { + dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); + input = NULL; + error = -ENOMEM; + goto err_unregister_device; + } + + error = sysfs_create_group(&client->dev.kobj, + &edt_ft5x06_i2c_attr_group); + if (error) + goto err_free_irq; + + device_init_wakeup(&client->dev, 1); + + dev_dbg(&tsdata->client->dev, + "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n", + tsdata->irq_pin, tsdata->reset_pin); + + return 0; + +err_free_irq: + free_irq(tsdata->irq, tsdata); +err_unregister_device: + input_unregister_device(input); + input = NULL; +err_free_input_device: + if (input) { + kfree(input->name); + input_free_device(input); + } +err_free_irq_pin: + gpio_free(tsdata->irq_pin); +err_free_reset_pin: + if (tsdata->reset_pin >= 0) + gpio_free(tsdata->reset_pin); +err_free_tsdata: + kfree(tsdata); + return error; +} + +static int edt_ft5x06_i2c_ts_remove(struct i2c_client *client) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(&client->dev); + + sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_i2c_attr_group); + + free_irq(tsdata->irq, tsdata); + kfree(tsdata->input->name); + input_unregister_device(tsdata->input); + gpio_free(tsdata->irq_pin); + if (tsdata->reset_pin >= 0) + gpio_free(tsdata->reset_pin); + kfree(tsdata); + + return 0; +} + +static int edt_ft5x06_i2c_ts_suspend(struct device *dev) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(tsdata->irq); + + return 0; +} + +static int edt_ft5x06_i2c_ts_resume(struct device *dev) +{ + struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(tsdata->irq); + + return 0; +} + +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 = edt_ft5x06_i2c_ts_remove, +}; + +static int __init edt_ft5x06_i2c_ts_init(void) +{ + return i2c_add_driver(&edt_ft5x06_i2c_ts_driver); +} +module_init(edt_ft5x06_i2c_ts_init); + +static void __exit edt_ft5x06_i2c_ts_exit(void) +{ + i2c_del_driver(&edt_ft5x06_i2c_ts_driver); +} +module_exit(edt_ft5x06_i2c_ts_exit); + +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 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
