/* * Weida HiTech WDT87xx TouchScreen I2C driver * * Copyright (c) 2015 Weida Hi-Tech Co., Ltd. * HN Chen <[email protected]> * * This software is licensed under the terms of the GNU General Public * License, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. */ #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/irq.h> #include <linux/io.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/firmware.h> #include <linux/input/mt.h> #include <linux/acpi.h> #include <linux/unaligned.h> #define WDT87XX_NAME … #define WDT87XX_FW_NAME … #define WDT87XX_CFG_NAME … #define MODE_ACTIVE … #define MODE_READY … #define MODE_IDLE … #define MODE_SLEEP … #define MODE_STOP … #define WDT_MAX_FINGER … #define WDT_RAW_BUF_COUNT … #define WDT_V1_RAW_BUF_COUNT … #define WDT_FIRMWARE_ID … #define PG_SIZE … #define MAX_RETRIES … #define MAX_UNIT_AXIS … #define PKT_READ_SIZE … #define PKT_WRITE_SIZE … /* the finger definition of the report event */ #define FINGER_EV_OFFSET_ID … #define FINGER_EV_OFFSET_X … #define FINGER_EV_OFFSET_Y … #define FINGER_EV_SIZE … #define FINGER_EV_V1_OFFSET_ID … #define FINGER_EV_V1_OFFSET_W … #define FINGER_EV_V1_OFFSET_P … #define FINGER_EV_V1_OFFSET_X … #define FINGER_EV_V1_OFFSET_Y … #define FINGER_EV_V1_SIZE … /* The definition of a report packet */ #define TOUCH_PK_OFFSET_REPORT_ID … #define TOUCH_PK_OFFSET_EVENT … #define TOUCH_PK_OFFSET_SCAN_TIME … #define TOUCH_PK_OFFSET_FNGR_NUM … #define TOUCH_PK_V1_OFFSET_REPORT_ID … #define TOUCH_PK_V1_OFFSET_EVENT … #define TOUCH_PK_V1_OFFSET_SCAN_TIME … #define TOUCH_PK_V1_OFFSET_FNGR_NUM … /* The definition of the controller parameters */ #define CTL_PARAM_OFFSET_FW_ID … #define CTL_PARAM_OFFSET_PLAT_ID … #define CTL_PARAM_OFFSET_XMLS_ID1 … #define CTL_PARAM_OFFSET_XMLS_ID2 … #define CTL_PARAM_OFFSET_PHY_CH_X … #define CTL_PARAM_OFFSET_PHY_CH_Y … #define CTL_PARAM_OFFSET_PHY_X0 … #define CTL_PARAM_OFFSET_PHY_X1 … #define CTL_PARAM_OFFSET_PHY_Y0 … #define CTL_PARAM_OFFSET_PHY_Y1 … #define CTL_PARAM_OFFSET_PHY_W … #define CTL_PARAM_OFFSET_PHY_H … #define CTL_PARAM_OFFSET_FACTOR … /* The definition of the device descriptor */ #define WDT_GD_DEVICE … #define DEV_DESC_OFFSET_VID … #define DEV_DESC_OFFSET_PID … /* Communication commands */ #define PACKET_SIZE … #define VND_REQ_READ … #define VND_READ_DATA … #define VND_REQ_WRITE … #define VND_CMD_START … #define VND_CMD_STOP … #define VND_CMD_RESET … #define VND_CMD_ERASE … #define VND_GET_CHECKSUM … #define VND_SET_DATA … #define VND_SET_COMMAND_DATA … #define VND_SET_CHECKSUM_CALC … #define VND_SET_CHECKSUM_LENGTH … #define VND_CMD_SFLCK … #define VND_CMD_SFUNL … #define CMD_SFLCK_KEY … #define CMD_SFUNL_KEY … #define STRIDX_PLATFORM_ID … #define STRIDX_PARAMETERS … #define CMD_BUF_SIZE … #define PKT_BUF_SIZE … /* The definition of the command packet */ #define CMD_REPORT_ID_OFFSET … #define CMD_TYPE_OFFSET … #define CMD_INDEX_OFFSET … #define CMD_KEY_OFFSET … #define CMD_LENGTH_OFFSET … #define CMD_DATA_OFFSET … /* The definition of firmware chunk tags */ #define FOURCC_ID_RIFF … #define FOURCC_ID_WHIF … #define FOURCC_ID_FRMT … #define FOURCC_ID_FRWR … #define FOURCC_ID_CNFG … #define CHUNK_ID_FRMT … #define CHUNK_ID_FRWR … #define CHUNK_ID_CNFG … #define FW_FOURCC1_OFFSET … #define FW_SIZE_OFFSET … #define FW_FOURCC2_OFFSET … #define FW_PAYLOAD_OFFSET … #define FW_CHUNK_ID_OFFSET … #define FW_CHUNK_SIZE_OFFSET … #define FW_CHUNK_TGT_START_OFFSET … #define FW_CHUNK_PAYLOAD_LEN_OFFSET … #define FW_CHUNK_SRC_START_OFFSET … #define FW_CHUNK_VERSION_OFFSET … #define FW_CHUNK_ATTR_OFFSET … #define FW_CHUNK_PAYLOAD_OFFSET … /* Controller requires minimum 300us between commands */ #define WDT_COMMAND_DELAY_MS … #define WDT_FLASH_WRITE_DELAY_MS … #define WDT_FLASH_ERASE_DELAY_MS … #define WDT_FW_RESET_TIME … struct wdt87xx_sys_param { … }; struct wdt87xx_data { … }; static int wdt87xx_i2c_xfer(struct i2c_client *client, void *txdata, size_t txlen, void *rxdata, size_t rxlen) { … } static int wdt87xx_get_desc(struct i2c_client *client, u8 desc_idx, u8 *buf, size_t len) { … } static int wdt87xx_get_string(struct i2c_client *client, u8 str_idx, u8 *buf, size_t len) { … } static int wdt87xx_get_feature(struct i2c_client *client, u8 *buf, size_t buf_size) { … } static int wdt87xx_set_feature(struct i2c_client *client, const u8 *buf, size_t buf_size) { … } static int wdt87xx_send_command(struct i2c_client *client, int cmd, int value) { … } static int wdt87xx_sw_reset(struct i2c_client *client) { … } static const void *wdt87xx_get_fw_chunk(const struct firmware *fw, u32 id) { … } static int wdt87xx_get_sysparam(struct i2c_client *client, struct wdt87xx_sys_param *param) { … } static int wdt87xx_validate_firmware(struct wdt87xx_data *wdt, const struct firmware *fw) { … } static int wdt87xx_validate_fw_chunk(const void *data, int id) { … } static int wdt87xx_write_data(struct i2c_client *client, const char *data, u32 address, int length) { … } static u16 misr(u16 cur_value, u8 new_value) { … } static u16 wdt87xx_calculate_checksum(const u8 *data, size_t length) { … } static int wdt87xx_get_checksum(struct i2c_client *client, u16 *checksum, u32 address, int length) { … } static int wdt87xx_write_firmware(struct i2c_client *client, const void *chunk) { … } static int wdt87xx_load_chunk(struct i2c_client *client, const struct firmware *fw, u32 ck_id) { … } static int wdt87xx_do_update_firmware(struct i2c_client *client, const struct firmware *fw, unsigned int chunk_id) { … } static int wdt87xx_update_firmware(struct device *dev, const char *fw_name, unsigned int chunk_id) { … } static ssize_t config_csum_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t fw_version_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t plat_id_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t update_config_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RO(config_csum); static DEVICE_ATTR_RO(fw_version); static DEVICE_ATTR_RO(plat_id); static DEVICE_ATTR_WO(update_config); static DEVICE_ATTR_WO(update_fw); static struct attribute *wdt87xx_attrs[] = …; ATTRIBUTE_GROUPS(…); static void wdt87xx_report_contact(struct input_dev *input, struct wdt87xx_sys_param *param, u8 *buf) { … } static irqreturn_t wdt87xx_ts_interrupt(int irq, void *dev_id) { … } static int wdt87xx_ts_create_input_device(struct wdt87xx_data *wdt) { … } static int wdt87xx_ts_probe(struct i2c_client *client) { … } static int wdt87xx_suspend(struct device *dev) { … } static int wdt87xx_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume); static const struct i2c_device_id wdt87xx_dev_id[] = …; MODULE_DEVICE_TABLE(i2c, wdt87xx_dev_id); static const struct acpi_device_id wdt87xx_acpi_id[] = …; MODULE_DEVICE_TABLE(acpi, wdt87xx_acpi_id); static struct i2c_driver wdt87xx_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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