// SPDX-License-Identifier: GPL-2.0-only /* * Elan Microelectronics touch panels with I2C interface * * Copyright (C) 2014 Elan Microelectronics Corporation. * Scott Liu <[email protected]> * * This code is partly based on hid-multitouch.c: * * Copyright (c) 2010-2012 Stephane Chatty <[email protected]> * Copyright (c) 2010-2012 Benjamin Tissoires <[email protected]> * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France * * This code is partly based on i2c-hid.c: * * Copyright (c) 2012 Benjamin Tissoires <[email protected]> * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France * Copyright (c) 2012 Red Hat, Inc */ #include <linux/bits.h> #include <linux/module.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/platform_device.h> #include <linux/async.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/uaccess.h> #include <linux/buffer_head.h> #include <linux/slab.h> #include <linux/firmware.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/acpi.h> #include <linux/of.h> #include <linux/pm_wakeirq.h> #include <linux/gpio/consumer.h> #include <linux/regulator/consumer.h> #include <linux/uuid.h> #include <linux/unaligned.h> /* Device, Driver information */ #define DEVICE_NAME … /* Convert from rows or columns into resolution */ #define ELAN_TS_RESOLUTION(n, m) … /* FW header data */ #define HEADER_SIZE … #define FW_HDR_TYPE … #define FW_HDR_COUNT … #define FW_HDR_LENGTH … /* Buffer mode Queue Header information */ #define QUEUE_HEADER_SINGLE … #define QUEUE_HEADER_NORMAL … #define QUEUE_HEADER_WAIT … #define QUEUE_HEADER_NORMAL2 … /* Command header definition */ #define CMD_HEADER_WRITE … #define CMD_HEADER_READ … #define CMD_HEADER_6B_READ … #define CMD_HEADER_ROM_READ … #define CMD_HEADER_RESP … #define CMD_HEADER_6B_RESP … #define CMD_HEADER_ROM_RESP … #define CMD_HEADER_HELLO … #define CMD_HEADER_REK … /* FW position data */ #define PACKET_SIZE_OLD … #define PACKET_SIZE … #define MAX_CONTACT_NUM … #define FW_POS_HEADER … #define FW_POS_STATE … #define FW_POS_TOTAL … #define FW_POS_XY … #define FW_POS_TOOL_TYPE … #define FW_POS_CHECKSUM … #define FW_POS_WIDTH … #define FW_POS_PRESSURE … #define HEADER_REPORT_10_FINGER … /* Header (4 bytes) plus 3 full 10-finger packets */ #define MAX_PACKET_SIZE … #define BOOT_TIME_DELAY_MS … /* FW read command, 0x53 0x?? 0x0, 0x01 */ #define E_ELAN_INFO_FW_VER … #define E_ELAN_INFO_BC_VER … #define E_ELAN_INFO_X_RES … #define E_ELAN_INFO_Y_RES … #define E_ELAN_INFO_REK … #define E_ELAN_INFO_TEST_VER … #define E_ELAN_INFO_FW_ID … #define E_INFO_OSR … #define E_INFO_PHY_SCAN … #define E_INFO_PHY_DRIVER … /* FW write command, 0x54 0x?? 0x0, 0x01 */ #define E_POWER_STATE_SLEEP … #define E_POWER_STATE_RESUME … #define MAX_RETRIES … #define MAX_FW_UPDATE_RETRIES … #define ELAN_FW_PAGESIZE … /* calibration timeout definition */ #define ELAN_CALI_TIMEOUT_MSEC … #define ELAN_POWERON_DELAY_USEC … #define ELAN_RESET_DELAY_MSEC … /* FW boot code version */ #define BC_VER_H_BYTE_FOR_EKTH3900x1_I2C … #define BC_VER_H_BYTE_FOR_EKTH3900x2_I2C … #define BC_VER_H_BYTE_FOR_EKTH3900x3_I2C … #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C … #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C … #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C … #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C … #define BC_VER_H_BYTE_FOR_EKTH5312x1_I2C_USB … #define BC_VER_H_BYTE_FOR_EKTH5312x2_I2C_USB … #define BC_VER_H_BYTE_FOR_EKTH5312cx1_I2C_USB … #define BC_VER_H_BYTE_FOR_EKTH5312cx2_I2C_USB … enum elants_chip_id { … }; enum elants_state { … }; enum elants_iap_mode { … }; /* struct elants_data - represents state of Elan touchscreen device */ struct elants_data { … }; static int elants_i2c_send(struct i2c_client *client, const void *data, size_t size) { … } static int elants_i2c_read(struct i2c_client *client, void *data, size_t size) { … } static int elants_i2c_execute_command(struct i2c_client *client, const u8 *cmd, size_t cmd_size, u8 *resp, size_t resp_size, int retries, const char *cmd_name) { … } static int elants_i2c_calibrate(struct elants_data *ts) { … } static int elants_i2c_sw_reset(struct i2c_client *client) { … } static u16 elants_i2c_parse_version(u8 *buf) { … } static int elants_i2c_query_hw_version(struct elants_data *ts) { … } static int elants_i2c_query_fw_version(struct elants_data *ts) { … } static int elants_i2c_query_test_version(struct elants_data *ts) { … } static int elants_i2c_query_bc_version(struct elants_data *ts) { … } static int elants_i2c_query_ts_info_ektf(struct elants_data *ts) { … } static int elants_i2c_query_ts_info_ekth(struct elants_data *ts) { … } static int elants_i2c_fastboot(struct i2c_client *client) { … } static int elants_i2c_initialize(struct elants_data *ts) { … } /* * Firmware update interface. */ static int elants_i2c_fw_write_page(struct i2c_client *client, const void *page) { … } static int elants_i2c_validate_remark_id(struct elants_data *ts, const struct firmware *fw) { … } static bool elants_i2c_should_check_remark_id(struct elants_data *ts) { … } static int elants_i2c_do_update_firmware(struct i2c_client *client, const struct firmware *fw, bool force) { … } static int elants_i2c_fw_update(struct elants_data *ts) { … } /* * Event reporting. */ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf, size_t packet_size) { … } static u8 elants_i2c_calculate_checksum(u8 *buf) { … } static void elants_i2c_event(struct elants_data *ts, u8 *buf, size_t packet_size) { … } static irqreturn_t elants_i2c_irq(int irq, void *_dev) { … } /* * sysfs interface */ static ssize_t calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t write_update_fw(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_iap_mode(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_calibration_count(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_WO(calibrate); static DEVICE_ATTR(iap_mode, S_IRUGO, show_iap_mode, NULL); static DEVICE_ATTR(calibration_count, S_IRUGO, show_calibration_count, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, write_update_fw); struct elants_version_attribute { … }; #define __ELANTS_FIELD_SIZE(_field) … #define __ELANTS_VERIFY_SIZE(_field) … #define ELANTS_VERSION_ATTR(_field) … static ssize_t elants_version_attribute_show(struct device *dev, struct device_attribute *dattr, char *buf) { … } static ELANTS_VERSION_ATTR(fw_version); static ELANTS_VERSION_ATTR(hw_version); static ELANTS_VERSION_ATTR(test_version); static ELANTS_VERSION_ATTR(solution_version); static ELANTS_VERSION_ATTR(bc_version); static ELANTS_VERSION_ATTR(iap_version); static struct attribute *elants_i2c_attrs[] = …; ATTRIBUTE_GROUPS(…); static int elants_i2c_power_on(struct elants_data *ts) { … } static void elants_i2c_power_off(void *_data) { … } #ifdef CONFIG_ACPI static const struct acpi_device_id i2c_hid_ids[] = …; static const guid_t i2c_hid_guid = …; static bool elants_acpi_is_hid_device(struct device *dev) { … } #else static bool elants_acpi_is_hid_device(struct device *dev) { return false; } #endif static int elants_i2c_probe(struct i2c_client *client) { … } static int elants_i2c_suspend(struct device *dev) { … } static int elants_i2c_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(elants_i2c_pm_ops, elants_i2c_suspend, elants_i2c_resume); static const struct i2c_device_id elants_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, elants_i2c_id); #ifdef CONFIG_ACPI static const struct acpi_device_id elants_acpi_id[] = …; MODULE_DEVICE_TABLE(acpi, elants_acpi_id); #endif #ifdef CONFIG_OF static const struct of_device_id elants_of_match[] = …; MODULE_DEVICE_TABLE(of, elants_of_match); #endif static struct i2c_driver elants_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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