The stmfts (ST-Microelectronics FingerTip S) touchscreen device is a capacitive multi-touch controller mainly for mobile use.
It's connected through i2c bus at the address 0x49 and it interfaces with userspace through input event interface. At the current state it provides a touchscreen multitouch functionality up to 10 fingers. Each finger is enumerated with a distinctive id (from 0 to 9). If enabled the device can support single "touch" hovering, by providing three coordinates, x, y, z. The z coordinate is related to the distance between the finger and the touchscreen itself. It is possible to select the touchkey functionality which provides a basic two keys interface for "home" and "back" menu, typical in mobile phones. Signed-off-by: Andi Shyti <[email protected]> --- drivers/input/touchscreen/Kconfig | 12 + drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/stmfts.c | 759 +++++++++++++++++++++++++++++++++++++ 3 files changed, 772 insertions(+) create mode 100644 drivers/input/touchscreen/stmfts.c diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 8650c94e29d0..18c2f919eb79 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -1092,6 +1092,18 @@ config TOUCHSCREEN_ST1232 To compile this driver as a module, choose M here: the module will be called st1232_ts. +config TOUCHSCREEN_STMFTS + tristate "STMicroelectronics STMFTS touchscreen" + depends on I2C + depends on INPUT + depends on LEDS_CLASS + help + Say Y here if you want support for STMicroelectronics + STMFTS touchscreen. + + To compile this driver as a module, choose M here: the + module will be called stmfts. + config TOUCHSCREEN_STMPE tristate "STMicroelectronics STMPE touchscreens" depends on MFD_STMPE diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index e41e3c7aa427..be7673f9c71a 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o obj-$(CONFIG_TOUCHSCREEN_SILEAD) += silead.o obj-$(CONFIG_TOUCHSCREEN_SIS_I2C) += sis_i2c.o obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o +obj-$(CONFIG_TOUCHSCREEN_STMFTS) += stmfts.o obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o obj-$(CONFIG_TOUCHSCREEN_SUN4I) += sun4i-ts.o obj-$(CONFIG_TOUCHSCREEN_SUR40) += sur40.o diff --git a/drivers/input/touchscreen/stmfts.c b/drivers/input/touchscreen/stmfts.c new file mode 100644 index 000000000000..abccc14d06d2 --- /dev/null +++ b/drivers/input/touchscreen/stmfts.c @@ -0,0 +1,759 @@ +/* + * Copyright (c) 2017 Samsung Electronics Co., Ltd. + * Author: Andi Shyti <[email protected]> + * + * 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. + * + * STMicroelectronics FTS Touchscreen device driver + */ + +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/input/mt.h> +#include <linux/interrupt.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/regulator/consumer.h> + +/* I2C commands */ +#define STMFTS_READ_INFO 0x80 +#define STMFTS_READ_STATUS 0x84 +#define STMFTS_READ_ONE_EVENT 0x85 +#define STMFTS_SLEEP_IN 0x91 +#define STMFTS_SLEEP_OUT 0x91 +#define STMFTS_MS_MT_SENSE_OFF 0x92 +#define STMFTS_MS_MT_SENSE_ON 0x93 +#define STMFTS_SS_HOVER_SENSE_OFF 0x94 +#define STMFTS_SS_HOVER_SENSE_ON 0x95 +#define STMFTS_MS_KEY_SENSE_OFF 0x9a +#define STMFTS_MS_KEY_SENSE_ON 0x9b +#define STMFTS_SYSTEM_RESET 0xa0 +#define STMFTS_CLEAR_EVENT_STACK 0xa1 +#define STMFTS_FULL_FORCE_CALIBRATION 0xa2 +#define STMFTS_MS_CX_TUNING 0xa3 +#define STMFTS_SS_CX_TUNING 0xa4 + +/* events */ +#define STMFTS_EV_NO_EVENT 0x00 +#define STMFTS_EV_MULTI_TOUCH_DETECTED 0x02 +#define STMFTS_EV_MULTI_TOUCH_ENTER 0x03 +#define STMFTS_EV_MULTI_TOUCH_LEAVE 0x04 +#define STMFTS_EV_MULTI_TOUCH_MOTION 0x05 +#define STMFTS_EV_HOVER_ENTER 0x07 +#define STMFTS_EV_HOVER_LEAVE 0x08 +#define STMFTS_EV_HOVER_MOTION 0x09 +#define STMFTS_EV_KEY_STATUS 0x0e +#define STMFTS_EV_ERROR 0x0f +#define STMFTS_EV_CONTROLLER_READY 0x10 +#define STMFTS_EV_SLEEP_OUT_CONTROLLER_READY 0x11 +#define STMFTS_EV_STATUS 0x16 + +/* multi touch related event masks */ +#define STMFTS_MASK_EVENT_ID 0x0f +#define STMFTS_MASK_TOUCH_ID 0xf0 +#define STMFTS_MASK_LEFT_EVENT 0x0f +#define STMFTS_MASK_X_MSB 0x0f +#define STMFTS_MASK_Y_LSB 0xf0 + +/* key related event masks */ +#define STMFTS_MASK_KEY_NO_TOUCH 0x00 +#define STMFTS_MASK_KEY_BACK 0x01 +#define STMFTS_MASK_KEY_MENU 0x02 + +#define STMFTS_EVENT_SIZE 8 +#define STMFTS_MAX_FINGERS 10 +#define STMFTS_DEV_NAME "stmfts" + +enum stmfts_regulators { + STMFTS_REGULATOR_VDD, + STMFTS_REGULATOR_AVDD, +}; + +struct stmfts_data { + struct i2c_client *client; + struct input_dev *input_touch; + struct input_dev *input_key; + struct led_classdev led_cdev; + struct mutex mutex; + u32 x_size; + u32 y_size; + + struct regulator_bulk_data regulators[2]; + + /* ledvdd will be used also to check + * whether the LED is supported + */ + struct regulator *ledvdd; + + bool use_key; + bool signal; + bool led_status; + u8 users; + + u16 chip_id; + u8 chip_ver; + u16 fw_ver; + u8 config_id; + u8 config_ver; + u8 in_touch; + + wait_queue_head_t wq; + + bool hover_enabled; +}; + +static void stmfts_brightness_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct stmfts_data *sdata = container_of(led_cdev, + struct stmfts_data, led_cdev); + + if (value == sdata->led_status) + return; + + if (!value) { + regulator_disable(sdata->ledvdd); + } else { + int err = regulator_enable(sdata->ledvdd); + + if (err) + dev_warn(&sdata->client->dev, + "failed to disable ledvdd regulator\n"); + } + + sdata->led_status = value; +} + +static enum led_brightness stmfts_brightness_get(struct led_classdev *led_cdev) +{ + struct stmfts_data *sdata = container_of(led_cdev, + struct stmfts_data, led_cdev); + + return !!regulator_is_enabled(sdata->ledvdd); +} + +static void stmfts_parse_event(struct stmfts_data *sdata, u8 event[]) +{ + int ret; + u8 id, t_id = 0; + u16 x, y, z, maj, min, orientation, area; + + id = event[0]; + + do { + mutex_lock(&sdata->mutex); + if (sdata->in_touch) { + id = event[0] & STMFTS_MASK_EVENT_ID; + t_id = (event[0] & STMFTS_MASK_TOUCH_ID) >> 4; + } else { + id = event[0]; + t_id = 0; + } + + switch (id) { + case STMFTS_EV_NO_EVENT: + break; + + case STMFTS_EV_MULTI_TOUCH_ENTER: + case STMFTS_EV_MULTI_TOUCH_LEAVE: + case STMFTS_EV_MULTI_TOUCH_MOTION: + if (id == STMFTS_EV_MULTI_TOUCH_ENTER) { + if (!(sdata->in_touch++)) + input_mt_report_slot_state( + sdata->input_touch, + MT_TOOL_FINGER, true); + } else if (id == STMFTS_EV_MULTI_TOUCH_LEAVE) { + if (!(--sdata->in_touch)) + input_mt_report_slot_state( + sdata->input_touch, + MT_TOOL_FINGER, false); + } + + x = event[1] | ((event[2] & STMFTS_MASK_X_MSB) << 8); + y = (event[2] >> 4) | (event[3] << 4); + + maj = event[4]; + min = event[5]; + orientation = event[6]; + area = event[7]; + + input_mt_slot(sdata->input_touch, t_id); + input_report_abs(sdata->input_touch, + ABS_MT_POSITION_X, x); + input_report_abs(sdata->input_touch, + ABS_MT_POSITION_Y, y); + input_report_abs(sdata->input_touch, + ABS_MT_TOUCH_MAJOR, maj); + input_report_abs(sdata->input_touch, + ABS_MT_TOUCH_MINOR, min); + input_report_abs(sdata->input_touch, + ABS_MT_PRESSURE, area); + input_report_abs(sdata->input_touch, + ABS_MT_ORIENTATION, orientation); + input_sync(sdata->input_touch); + + break; + + case STMFTS_EV_HOVER_ENTER: + case STMFTS_EV_HOVER_LEAVE: + case STMFTS_EV_HOVER_MOTION: + x = (event[2] << 4) | (event[4] >> 4); + y = (event[3] << 4) | (event[4] & STMFTS_MASK_Y_LSB); + z = event[5]; + orientation = event[6] & STMFTS_MASK_Y_LSB; + + input_report_abs(sdata->input_touch, ABS_X, x); + input_report_abs(sdata->input_touch, ABS_Y, y); + input_report_abs(sdata->input_touch, ABS_Z, z); + input_sync(sdata->input_touch); + + break; + + case STMFTS_EV_KEY_STATUS: + if (!event[2]) { + input_report_key(sdata->input_key, KEY_BACK, 0); + input_report_key(sdata->input_key, KEY_MENU, 0); + } else { + if (event[2] == STMFTS_MASK_KEY_BACK) + input_report_key(sdata->input_key, + KEY_BACK, 1); + else if (event[2] == STMFTS_MASK_KEY_MENU) + input_report_key(sdata->input_key, + KEY_MENU, 1); + else /* quite impossible */ + break; + } + input_sync(sdata->input_key); + break; + + case STMFTS_EV_STATUS: + sdata->signal = true; + wake_up_interruptible(&sdata->wq); + break; + + case STMFTS_EV_ERROR: + dev_err(&sdata->client->dev, + "error code: 0x%x%x%x%x%x%x", + event[6], event[5], event[4], + event[3], event[2], event[1]); + break; + + default: + dev_err(&sdata->client->dev, + "unknown event 0x%x\n", event[0]); + } + mutex_unlock(&sdata->mutex); + + ret = i2c_smbus_read_i2c_block_data(sdata->client, + STMFTS_READ_ONE_EVENT, + STMFTS_EVENT_SIZE, event); + if (ret) { + i2c_smbus_write_byte(sdata->client, + STMFTS_CLEAR_EVENT_STACK); + break; + } + + } while (event[0]); +} + +static irqreturn_t stmfts_irq_handler(int irq, void *dev) +{ + struct stmfts_data *sdata = dev; + int ret; + u8 event[STMFTS_EVENT_SIZE]; + + ret = i2c_smbus_read_i2c_block_data(sdata->client, + STMFTS_READ_ONE_EVENT, + STMFTS_EVENT_SIZE, event); + + switch (event[0]) { + case STMFTS_EV_CONTROLLER_READY: + case STMFTS_EV_SLEEP_OUT_CONTROLLER_READY: + sdata->signal = true; + wake_up_interruptible(&sdata->wq); + break; + default: + stmfts_parse_event(sdata, event); + } + + return IRQ_HANDLED; +} + +static int stmfts_write_and_wait(struct stmfts_data *sdata, const u8 cmd) +{ + int err; + + err = i2c_smbus_write_byte(sdata->client, cmd); + if (err) + return err; + + sdata->signal = false; + err = wait_event_interruptible_timeout(sdata->wq, sdata->signal, + msecs_to_jiffies(1000)); + + return !err ? -ETIMEDOUT : 0; +} + +static void stmfts_sleep_in(struct stmfts_data *sdata) +{ + mutex_lock(&sdata->mutex); + + sdata->users--; + if (!sdata->users) + i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_IN); + + mutex_unlock(&sdata->mutex); +} + +static int stmfts_sleep_out(struct stmfts_data *sdata, u8 cmd) +{ + int ret = 0; + + mutex_lock(&sdata->mutex); + + if (!sdata->users) + ret = stmfts_write_and_wait(sdata, STMFTS_SLEEP_OUT); + + /* if sleep out succeeds users increments, otherwise not */ + sdata->users += !ret; + + mutex_unlock(&sdata->mutex); + + ret = i2c_smbus_write_byte(sdata->client, cmd); + if (ret) + stmfts_sleep_in(sdata); + + return ret; +} + +static int stmfts_input_touch_open(struct input_dev *dev) +{ + struct stmfts_data *sdata = input_get_drvdata(dev); + + return stmfts_sleep_out(sdata, STMFTS_MS_MT_SENSE_ON); +} + +static void stmfts_input_touch_close(struct input_dev *dev) +{ + struct stmfts_data *sdata = input_get_drvdata(dev); + + i2c_smbus_write_byte(sdata->client, STMFTS_MS_MT_SENSE_OFF); + + stmfts_sleep_in(sdata); +} + +static int stmfts_input_key_open(struct input_dev *dev) +{ + struct stmfts_data *sdata = input_get_drvdata(dev); + + return stmfts_sleep_out(sdata, STMFTS_MS_KEY_SENSE_ON); +} + +static void stmfts_input_key_close(struct input_dev *dev) +{ + struct stmfts_data *sdata = input_get_drvdata(dev); + + i2c_smbus_write_byte(sdata->client, STMFTS_MS_KEY_SENSE_OFF); + stmfts_sleep_in(sdata); +} + +static ssize_t stmfts_sysfs_hwid(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "ST-Microelectronics FTS 0x%x version %u\n", + sdata->chip_id, sdata->chip_ver); +} + +static ssize_t stmfts_sysfs_fw_ver(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", sdata->fw_ver); +} + +static ssize_t stmfts_sysfs_config_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "0x%x version %u\n", + sdata->config_id, sdata->config_ver); +} + +static ssize_t stmfts_sysfs_read_status(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + u8 status[4]; + int ret; + + ret = i2c_smbus_read_i2c_block_data(sdata->client, + STMFTS_READ_STATUS, 4, status); + + return sprintf(buf, "0x%x\n", status[0]); +} + +static ssize_t stmfts_sysfs_hover_enable_read(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", sdata->hover_enabled); +} + +static ssize_t stmfts_sysfs_hover_enable_write(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + unsigned long value; + int err; + struct stmfts_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if (value & sdata->hover_enabled) + return len; + + if (value) { + err = stmfts_sleep_out(sdata, STMFTS_SS_HOVER_SENSE_ON); + sdata->hover_enabled = !err; + } else { + err = i2c_smbus_write_byte(sdata->client, + STMFTS_SS_HOVER_SENSE_OFF); + stmfts_sleep_in(sdata); + sdata->hover_enabled = !!err; + } + + return len; +} + +static DEVICE_ATTR(hwid, 0444, stmfts_sysfs_hwid, NULL); +static DEVICE_ATTR(fw_ver, 0444, stmfts_sysfs_fw_ver, NULL); +static DEVICE_ATTR(config_id, 0444, stmfts_sysfs_config_id, NULL); +static DEVICE_ATTR(status, 0444, stmfts_sysfs_read_status, NULL); +static DEVICE_ATTR(hover_enable, 0644, stmfts_sysfs_hover_enable_read, + stmfts_sysfs_hover_enable_write); + +static struct attribute *stmfts_sysfs_attrs[] = { + &dev_attr_hwid.attr, + &dev_attr_fw_ver.attr, + &dev_attr_config_id.attr, + &dev_attr_status.attr, + &dev_attr_hover_enable.attr, + NULL +}; + +static struct attribute_group stmfts_attribute_group = { + .attrs = stmfts_sysfs_attrs +}; + +static int stmfts_parse_dt(struct stmfts_data *sdata) +{ + int ret; + struct device_node *np = sdata->client->dev.of_node; + + if (!np) + return -ENOENT; + + ret = of_property_read_u32(np, "touchscreen-size-x", &sdata->x_size); + if (ret) + return ret; + + ret = of_property_read_u32(np, "touchscreen-size-y", &sdata->y_size); + if (ret) + return ret; + + sdata->use_key = of_property_read_bool(np, "touch-key-connected"); + + return 0; +} + +static int stmfts_power_on(struct stmfts_data *sdata) +{ + int err; + u8 reg[8]; + + err = regulator_bulk_enable(ARRAY_SIZE(sdata->regulators), + sdata->regulators); + if (err) + return err; + + /* + * the datasheet does not specify the power on time, but considering + * that the reset time is < 10ms, I sleep 20ms to be sure + */ + msleep(20); + + err = i2c_smbus_read_i2c_block_data(sdata->client, + STMFTS_READ_INFO, 8, reg); + if (err < 0) + return err; + if (err != 8) + return -EIO; + + sdata->chip_id = (reg[6] << 8) | reg[7]; + sdata->chip_ver = reg[0]; + sdata->fw_ver = (reg[2] << 8) | reg[3]; + sdata->config_id = reg[4]; + sdata->config_ver = reg[5]; + + enable_irq(sdata->client->irq); + err = stmfts_write_and_wait(sdata, STMFTS_SYSTEM_RESET); + if (err) + return err; + + err = stmfts_write_and_wait(sdata, STMFTS_SLEEP_OUT); + if (err) + return err; + + /* optional tuning */ + err = stmfts_write_and_wait(sdata, STMFTS_MS_CX_TUNING); + if (err) + dev_warn(&sdata->client->dev, "failed to perform mutual auto tune\n"); + + /* optional tuning */ + err = stmfts_write_and_wait(sdata, STMFTS_SS_CX_TUNING); + if (err) + dev_warn(&sdata->client->dev, "failed to perform self auto tune\n"); + + err = stmfts_write_and_wait(sdata, STMFTS_FULL_FORCE_CALIBRATION); + if (err) + return err; + + /* at this point no one is using the touchscreen + * and I don't really care about the return value + */ + i2c_smbus_write_byte(sdata->client, STMFTS_SLEEP_IN); + + return 0; +} + +static void stmfts_power_off(void *data) +{ + struct stmfts_data *sdata = data; + + disable_irq(sdata->client->irq); + regulator_bulk_disable(ARRAY_SIZE(sdata->regulators), + sdata->regulators); +} + +static int stmfts_enable_key(struct stmfts_data *sdata) +{ + int err; + + sdata->input_key = devm_input_allocate_device(&sdata->client->dev); + if (!sdata->input_key) + return -ENOMEM; + + sdata->input_key->name = "stmfts_key"; + sdata->input_key->id.bustype = BUS_I2C; + sdata->input_key->open = stmfts_input_key_open; + sdata->input_key->close = stmfts_input_key_close; + + input_set_capability(sdata->input_key, EV_KEY, KEY_MENU); + input_set_capability(sdata->input_key, EV_KEY, KEY_BACK); + + input_set_drvdata(sdata->input_key, sdata); + err = input_register_device(sdata->input_key); + if (err) + return err; + + /* get the regulator for powering the leds on */ + sdata->ledvdd = devm_regulator_get(&sdata->client->dev, "ledvdd"); + if (IS_ERR(sdata->ledvdd)) + /* there is no LED connected to the touch key */ + sdata->ledvdd = NULL; + + sdata->led_cdev.name = STMFTS_DEV_NAME; + sdata->led_cdev.max_brightness = LED_ON; + sdata->led_cdev.brightness = LED_OFF; + sdata->led_cdev.brightness_set = stmfts_brightness_set; + sdata->led_cdev.brightness_get = stmfts_brightness_get; + + err = devm_led_classdev_register(&sdata->client->dev, &sdata->led_cdev); + if (err) { + dev_warn(&sdata->client->dev, "unable to register led, led might not work\n"); + sdata->ledvdd = NULL; + + /* I don't want to prevent using the touch key + * only because the LEDs don't get registered + */ + err = 0; + } + + return err; +} + +static int stmfts_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int err; + struct stmfts_data *sdata; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | + I2C_FUNC_SMBUS_BYTE_DATA | + I2C_FUNC_SMBUS_I2C_BLOCK)) + return -ENODEV; + + sdata = devm_kzalloc(&client->dev, sizeof(*sdata), GFP_KERNEL); + if (!sdata) + return -ENOMEM; + + i2c_set_clientdata(client, sdata); + + mutex_init(&sdata->mutex); + + sdata->regulators[STMFTS_REGULATOR_VDD].supply = "vdd"; + sdata->regulators[STMFTS_REGULATOR_AVDD].supply = "avdd"; + err = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(sdata->regulators), sdata->regulators); + if (err) + return err; + + err = devm_add_action_or_reset(&client->dev, stmfts_power_off, sdata); + if (err) + return err; + + sdata->client = client; + + err = stmfts_parse_dt(sdata); + if (err) + return err; + + init_waitqueue_head(&sdata->wq); + + err = sysfs_create_group(&sdata->client->dev.kobj, + &stmfts_attribute_group); + if (err) + return err; + + err = devm_request_threaded_irq(&client->dev, client->irq, + NULL, stmfts_irq_handler, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + "stmfts_irq", sdata); + if (err) + return err; + + disable_irq(sdata->client->irq); + + dev_info(&client->dev, "initializing ST-Microelectronics FTS...\n"); + err = stmfts_power_on(sdata); + if (err) + return err; + + sdata->input_touch = devm_input_allocate_device(&client->dev); + if (!sdata->input_touch) + return -ENOMEM; + + sdata->input_touch->name = STMFTS_DEV_NAME; + sdata->input_touch->id.bustype = BUS_I2C; + sdata->input_touch->open = stmfts_input_touch_open; + sdata->input_touch->close = stmfts_input_touch_close; + + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_POSITION_Y); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_POSITION_X); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_TOUCH_MAJOR); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_TOUCH_MINOR); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_ORIENTATION); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_PRESSURE); + input_set_capability(sdata->input_touch, EV_ABS, ABS_MT_POSITION_X); + + input_set_abs_params(sdata->input_touch, + ABS_MT_POSITION_X, 0, sdata->x_size, 0, 0); + input_set_abs_params(sdata->input_touch, + ABS_MT_POSITION_Y, 0, sdata->y_size, 0, 0); + input_set_abs_params(sdata->input_touch, + ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); + input_set_abs_params(sdata->input_touch, + ABS_MT_TOUCH_MINOR, 0, 255, 0, 0); + input_set_abs_params(sdata->input_touch, + ABS_MT_ORIENTATION, 0, 255, 0, 0); + input_set_abs_params(sdata->input_touch, + ABS_MT_PRESSURE, 0, 255, 0, 0); + input_mt_init_slots(sdata->input_touch, + STMFTS_MAX_FINGERS, INPUT_MT_DIRECT); + + /* for hover features */ + input_set_capability(sdata->input_touch, EV_ABS, ABS_X); + input_set_capability(sdata->input_touch, EV_ABS, ABS_Y); + input_set_capability(sdata->input_touch, EV_ABS, ABS_Z); + input_set_abs_params(sdata->input_touch, ABS_X, 0, sdata->x_size, 0, 0); + input_set_abs_params(sdata->input_touch, ABS_Y, 0, sdata->y_size, 0, 0); + input_set_abs_params(sdata->input_touch, ABS_Z, 0, 255, 0, 0); + + input_set_drvdata(sdata->input_touch, sdata); + err = input_register_device(sdata->input_touch); + if (err) + return err; + + if (sdata->use_key) { + err = stmfts_enable_key(sdata); + if (err) + dev_warn(&client->dev, "failed to enable touchkey\n"); + } + + return 0; +} + +static int stmfts_remove(struct i2c_client *client) +{ + struct stmfts_data *sdata = i2c_get_clientdata(client); + + sysfs_remove_group(&sdata->client->dev.kobj, &stmfts_attribute_group); + + return 0; +} + +static int __maybe_unused stmfts_suspend(struct device *dev) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + stmfts_power_off(sdata); + + return 0; +} + +static int __maybe_unused stmfts_resume(struct device *dev) +{ + struct stmfts_data *sdata = dev_get_drvdata(dev); + + return stmfts_power_on(sdata); +} + +static SIMPLE_DEV_PM_OPS(stmfts_pm_ops, stmfts_suspend, stmfts_resume); + +static const struct of_device_id stmfts_of_match[] = { + { .compatible = "st,stmfts", }, + { }, +}; +MODULE_DEVICE_TABLE(of, stmfts_of_match); + +static const struct i2c_device_id stmfts_id[] = { + { "stmfts", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, stmfts_id); + +static struct i2c_driver stmfts_driver = { + .driver = { + .name = STMFTS_DEV_NAME, + .of_match_table = of_match_ptr(stmfts_of_match), + .pm = &stmfts_pm_ops, + }, + .probe = stmfts_probe, + .remove = stmfts_remove, + .id_table = stmfts_id, +}; + +module_i2c_driver(stmfts_driver); + +MODULE_AUTHOR("Andi Shyti <[email protected]>"); +MODULE_DESCRIPTION("STMicroelectronics FTS Touch Screen"); +MODULE_LICENSE("GPL v2"); -- 2.11.0
