// SPDX-License-Identifier: GPL-2.0-only /* * Raydium touchscreen I2C driver. * * Copyright (C) 2012-2014, Raydium Semiconductor Corporation. * * Raydium reserves the right to make changes without further notice * to the materials described herein. Raydium does not assume any * liability arising out of the application described herein. * * Contact Raydium Semiconductor Corporation at www.rad-ic.com */ #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/pm_wakeirq.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/unaligned.h> /* Slave I2C mode */ #define RM_BOOT_BLDR … #define RM_BOOT_MAIN … /* I2C bootoloader commands */ #define RM_CMD_BOOT_PAGE_WRT … #define RM_CMD_BOOT_WRT … #define RM_CMD_BOOT_ACK … #define RM_CMD_BOOT_CHK … #define RM_CMD_BOOT_READ … #define RM_BOOT_RDY … #define RM_BOOT_CMD_READHWID … /* I2C main commands */ #define RM_CMD_QUERY_BANK … #define RM_CMD_DATA_BANK … #define RM_CMD_ENTER_SLEEP … #define RM_CMD_BANK_SWITCH … #define RM_RESET_MSG_ADDR … #define RM_MAX_READ_SIZE … #define RM_PACKET_CRC_SIZE … /* Touch relative info */ #define RM_MAX_RETRIES … #define RM_RETRY_DELAY_MS … #define RM_MAX_TOUCH_NUM … #define RM_BOOT_DELAY_MS … /* Offsets in contact data */ #define RM_CONTACT_STATE_POS … #define RM_CONTACT_X_POS … #define RM_CONTACT_Y_POS … #define RM_CONTACT_PRESSURE_POS … #define RM_CONTACT_WIDTH_X_POS … #define RM_CONTACT_WIDTH_Y_POS … /* Bootloader relative info */ #define RM_BL_WRT_CMD_SIZE … #define RM_BL_WRT_PKG_SIZE … #define RM_BL_WRT_LEN … #define RM_FW_PAGE_SIZE … #define RM_MAX_FW_RETRIES … #define RM_MAX_FW_SIZE … #define RM_POWERON_DELAY_USEC … #define RM_RESET_DELAY_MSEC … enum raydium_bl_cmd { … }; enum raydium_bl_ack { … }; enum raydium_boot_mode { … }; /* Response to RM_CMD_DATA_BANK request */ struct raydium_data_info { … }; struct raydium_info { … }; /* struct raydium_data - represents state of Raydium touchscreen device */ struct raydium_data { … }; /* * Header to be sent for RM_CMD_BANK_SWITCH command. This is used by * raydium_i2c_{read|send} below. */ struct __packed raydium_bank_switch_header { … }; static int raydium_i2c_xfer(struct i2c_client *client, u32 addr, struct i2c_msg *xfer, size_t xfer_count) { … } static int raydium_i2c_send(struct i2c_client *client, u32 addr, const void *data, size_t len) { … } static int raydium_i2c_read(struct i2c_client *client, u32 addr, void *data, size_t len) { … } static int raydium_i2c_sw_reset(struct i2c_client *client) { … } static int raydium_i2c_query_ts_bootloader_info(struct raydium_data *ts) { … } static int raydium_i2c_query_ts_info(struct raydium_data *ts) { … } static int raydium_i2c_check_fw_status(struct raydium_data *ts) { … } static int raydium_i2c_initialize(struct raydium_data *ts) { … } static int raydium_i2c_bl_chk_state(struct i2c_client *client, enum raydium_bl_ack state) { … } static int raydium_i2c_write_object(struct i2c_client *client, const void *data, size_t len, enum raydium_bl_ack state) { … } static int raydium_i2c_boot_trigger(struct i2c_client *client) { … } static int raydium_i2c_fw_trigger(struct i2c_client *client) { … } static int raydium_i2c_check_path(struct i2c_client *client) { … } static int raydium_i2c_enter_bl(struct i2c_client *client) { … } static int raydium_i2c_leave_bl(struct i2c_client *client) { … } static int raydium_i2c_write_checksum(struct i2c_client *client, size_t length, u16 checksum) { … } static int raydium_i2c_disable_watch_dog(struct i2c_client *client) { … } static int raydium_i2c_fw_write_page(struct i2c_client *client, u16 page_idx, const void *data, size_t len) { … } static u16 raydium_calc_chksum(const u8 *buf, u16 len) { … } static int raydium_i2c_do_update_firmware(struct raydium_data *ts, const struct firmware *fw) { … } static int raydium_i2c_fw_update(struct raydium_data *ts) { … } static void raydium_mt_event(struct raydium_data *ts) { … } static irqreturn_t raydium_i2c_irq(int irq, void *_dev) { … } static ssize_t raydium_i2c_fw_ver_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t raydium_i2c_hw_ver_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t raydium_i2c_boot_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t raydium_i2c_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t raydium_i2c_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR(fw_version, S_IRUGO, raydium_i2c_fw_ver_show, NULL); static DEVICE_ATTR(hw_version, S_IRUGO, raydium_i2c_hw_ver_show, NULL); static DEVICE_ATTR(boot_mode, S_IRUGO, raydium_i2c_boot_mode_show, NULL); static DEVICE_ATTR(update_fw, S_IWUSR, NULL, raydium_i2c_update_fw_store); static DEVICE_ATTR(calibrate, S_IWUSR, NULL, raydium_i2c_calibrate_store); static struct attribute *raydium_i2c_attrs[] = …; ATTRIBUTE_GROUPS(…); static int raydium_i2c_power_on(struct raydium_data *ts) { … } static void raydium_i2c_power_off(void *_data) { … } static int raydium_i2c_probe(struct i2c_client *client) { … } static void raydium_enter_sleep(struct i2c_client *client) { … } static int raydium_i2c_suspend(struct device *dev) { … } static int raydium_i2c_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(raydium_i2c_pm_ops, raydium_i2c_suspend, raydium_i2c_resume); static const struct i2c_device_id raydium_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, raydium_i2c_id); #ifdef CONFIG_ACPI static const struct acpi_device_id raydium_acpi_id[] = …; MODULE_DEVICE_TABLE(acpi, raydium_acpi_id); #endif #ifdef CONFIG_OF static const struct of_device_id raydium_of_match[] = …; MODULE_DEVICE_TABLE(of, raydium_of_match); #endif static struct i2c_driver raydium_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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