// SPDX-License-Identifier: GPL-2.0-or-later /* * MELFAS MIP4 Touchscreen * * Copyright (C) 2016 MELFAS Inc. * * Author : Sangwon Jee <[email protected]> */ #include <linux/acpi.h> #include <linux/delay.h> #include <linux/firmware.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> #include <linux/slab.h> #include <asm/unaligned.h> #define MIP4_DEVICE_NAME … /***************************************************************** * Protocol * Version : MIP 4.0 Rev 5.4 *****************************************************************/ /* Address */ #define MIP4_R0_BOOT … #define MIP4_R1_BOOT_MODE … #define MIP4_R1_BOOT_BUF_ADDR … #define MIP4_R1_BOOT_STATUS … #define MIP4_R1_BOOT_CMD … #define MIP4_R1_BOOT_TARGET_ADDR … #define MIP4_R1_BOOT_SIZE … #define MIP4_R0_INFO … #define MIP4_R1_INFO_PRODUCT_NAME … #define MIP4_R1_INFO_RESOLUTION_X … #define MIP4_R1_INFO_RESOLUTION_Y … #define MIP4_R1_INFO_NODE_NUM_X … #define MIP4_R1_INFO_NODE_NUM_Y … #define MIP4_R1_INFO_KEY_NUM … #define MIP4_R1_INFO_PRESSURE_NUM … #define MIP4_R1_INFO_LENGTH_X … #define MIP4_R1_INFO_LENGTH_Y … #define MIP4_R1_INFO_PPM_X … #define MIP4_R1_INFO_PPM_Y … #define MIP4_R1_INFO_VERSION_BOOT … #define MIP4_R1_INFO_VERSION_CORE … #define MIP4_R1_INFO_VERSION_APP … #define MIP4_R1_INFO_VERSION_PARAM … #define MIP4_R1_INFO_SECT_BOOT_START … #define MIP4_R1_INFO_SECT_BOOT_END … #define MIP4_R1_INFO_SECT_CORE_START … #define MIP4_R1_INFO_SECT_CORE_END … #define MIP4_R1_INFO_SECT_APP_START … #define MIP4_R1_INFO_SECT_APP_END … #define MIP4_R1_INFO_SECT_PARAM_START … #define MIP4_R1_INFO_SECT_PARAM_END … #define MIP4_R1_INFO_BUILD_DATE … #define MIP4_R1_INFO_BUILD_TIME … #define MIP4_R1_INFO_CHECKSUM_PRECALC … #define MIP4_R1_INFO_CHECKSUM_REALTIME … #define MIP4_R1_INFO_PROTOCOL_NAME … #define MIP4_R1_INFO_PROTOCOL_VERSION … #define MIP4_R1_INFO_IC_ID … #define MIP4_R1_INFO_IC_NAME … #define MIP4_R1_INFO_IC_VENDOR_ID … #define MIP4_R1_INFO_IC_HW_CATEGORY … #define MIP4_R1_INFO_CONTACT_THD_SCR … #define MIP4_R1_INFO_CONTACT_THD_KEY … #define MIP4_R1_INFO_PID … #define MIP4_R1_INFO_VID … #define MIP4_R1_INFO_SLAVE_ADDR … #define MIP4_R0_EVENT … #define MIP4_R1_EVENT_SUPPORTED_FUNC … #define MIP4_R1_EVENT_FORMAT … #define MIP4_R1_EVENT_SIZE … #define MIP4_R1_EVENT_PACKET_INFO … #define MIP4_R1_EVENT_PACKET_DATA … #define MIP4_R0_CTRL … #define MIP4_R1_CTRL_READY_STATUS … #define MIP4_R1_CTRL_EVENT_READY … #define MIP4_R1_CTRL_MODE … #define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE … #define MIP4_R1_CTRL_RECALIBRATE … #define MIP4_R1_CTRL_POWER_STATE … #define MIP4_R1_CTRL_GESTURE_TYPE … #define MIP4_R1_CTRL_DISABLE_ESD_ALERT … #define MIP4_R1_CTRL_CHARGER_MODE … #define MIP4_R1_CTRL_HIGH_SENS_MODE … #define MIP4_R1_CTRL_WINDOW_MODE … #define MIP4_R1_CTRL_PALM_REJECTION … #define MIP4_R1_CTRL_EDGE_CORRECTION … #define MIP4_R1_CTRL_ENTER_GLOVE_MODE … #define MIP4_R1_CTRL_I2C_ON_LPM … #define MIP4_R1_CTRL_GESTURE_DEBUG … #define MIP4_R1_CTRL_PALM_EVENT … #define MIP4_R1_CTRL_PROXIMITY_SENSING … /* Value */ #define MIP4_BOOT_MODE_BOOT … #define MIP4_BOOT_MODE_APP … #define MIP4_BOOT_STATUS_BUSY … #define MIP4_BOOT_STATUS_ERROR … #define MIP4_BOOT_STATUS_DONE … #define MIP4_BOOT_CMD_MASS_ERASE … #define MIP4_BOOT_CMD_PROGRAM … #define MIP4_BOOT_CMD_ERASE … #define MIP4_BOOT_CMD_WRITE … #define MIP4_BOOT_CMD_READ … #define MIP4_EVENT_INPUT_TYPE_KEY … #define MIP4_EVENT_INPUT_TYPE_SCREEN … #define MIP4_EVENT_INPUT_TYPE_PROXIMITY … #define I2C_RETRY_COUNT … #define MIP4_BUF_SIZE … #define MIP4_MAX_FINGERS … #define MIP4_MAX_KEYS … #define MIP4_TOUCH_MAJOR_MIN … #define MIP4_TOUCH_MAJOR_MAX … #define MIP4_TOUCH_MINOR_MIN … #define MIP4_TOUCH_MINOR_MAX … #define MIP4_PRESSURE_MIN … #define MIP4_PRESSURE_MAX … #define MIP4_FW_NAME … #define MIP4_FW_UPDATE_DEBUG … struct mip4_fw_version { … }; struct mip4_ts { … }; static int mip4_i2c_xfer(struct mip4_ts *ts, char *write_buf, unsigned int write_len, char *read_buf, unsigned int read_len) { … } static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v) { … } /* * Read chip firmware version */ static int mip4_get_fw_version(struct mip4_ts *ts) { … } /* * Fetch device characteristics */ static int mip4_query_device(struct mip4_ts *ts) { … } static int mip4_power_on(struct mip4_ts *ts) { … } static void mip4_power_off(struct mip4_ts *ts) { … } /* * Clear touch input event status */ static void mip4_clear_input(struct mip4_ts *ts) { … } static int mip4_enable(struct mip4_ts *ts) { … } static void mip4_disable(struct mip4_ts *ts) { … } /***************************************************************** * Input handling *****************************************************************/ static void mip4_report_keys(struct mip4_ts *ts, u8 *packet) { … } static void mip4_report_touch(struct mip4_ts *ts, u8 *packet) { … } static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet) { … } static irqreturn_t mip4_interrupt(int irq, void *dev_id) { … } static int mip4_input_open(struct input_dev *dev) { … } static void mip4_input_close(struct input_dev *dev) { … } /***************************************************************** * Firmware update *****************************************************************/ /* Firmware Info */ #define MIP4_BL_PAGE_SIZE … #define MIP4_BL_PACKET_SIZE … /* * Firmware binary tail info */ struct mip4_bin_tail { … } __packed; #define MIP4_BIN_TAIL_MARK … #define MIP4_BIN_TAIL_SIZE … /* * Bootloader - Read status */ static int mip4_bl_read_status(struct mip4_ts *ts) { … } /* * Bootloader - Change mode */ static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode) { … } /* * Bootloader - Start bootloader mode */ static int mip4_bl_enter(struct mip4_ts *ts) { … } /* * Bootloader - Exit bootloader mode */ static int mip4_bl_exit(struct mip4_ts *ts) { … } static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr) { … } static int mip4_bl_program_page(struct mip4_ts *ts, int offset, const u8 *data, int length, u16 buf_addr) { … } static int mip4_bl_verify_page(struct mip4_ts *ts, int offset, const u8 *data, int length, int buf_addr) { … } /* * Flash chip firmware */ static int mip4_flash_fw(struct mip4_ts *ts, const u8 *fw_data, u32 fw_size, u32 fw_offset) { … } static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw, u32 *fw_offset_start, u32 *fw_size, const struct mip4_bin_tail **pfw_info) { … } static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw) { … } static ssize_t mip4_sysfs_fw_update(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update); static ssize_t mip4_sysfs_read_fw_version(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL); static ssize_t mip4_sysfs_read_hw_version(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL); static ssize_t mip4_sysfs_read_product_id(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(product_id, S_IRUGO, mip4_sysfs_read_product_id, NULL); static ssize_t mip4_sysfs_read_ic_name(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(ic_name, S_IRUGO, mip4_sysfs_read_ic_name, NULL); static struct attribute *mip4_attrs[] = …; ATTRIBUTE_GROUPS(…); static int mip4_probe(struct i2c_client *client) { … } static int mip4_suspend(struct device *dev) { … } static int mip4_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume); #ifdef CONFIG_OF static const struct of_device_id mip4_of_match[] = …; MODULE_DEVICE_TABLE(of, mip4_of_match); #endif #ifdef CONFIG_ACPI static const struct acpi_device_id mip4_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, mip4_acpi_match); #endif static const struct i2c_device_id mip4_i2c_ids[] = …; MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids); static struct i2c_driver mip4_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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