// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012-2013 MundoReader S.L. * Author: Heiko Stuebner <[email protected]> * * based in parts on Nook zforce driver * * Copyright (C) 2010 Barnes & Noble, Inc. * Author: Pieter Truter<[email protected]> */ #include <linux/module.h> #include <linux/hrtimer.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/device.h> #include <linux/sysfs.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> #include <linux/platform_data/zforce_ts.h> #include <linux/regulator/consumer.h> #include <linux/of.h> #define WAIT_TIMEOUT … #define FRAME_START … #define FRAME_MAXSIZE … /* Offsets of the different parts of the payload the controller sends */ #define PAYLOAD_HEADER … #define PAYLOAD_LENGTH … #define PAYLOAD_BODY … /* Response offsets */ #define RESPONSE_ID … #define RESPONSE_DATA … /* Commands */ #define COMMAND_DEACTIVATE … #define COMMAND_INITIALIZE … #define COMMAND_RESOLUTION … #define COMMAND_SETCONFIG … #define COMMAND_DATAREQUEST … #define COMMAND_SCANFREQ … #define COMMAND_STATUS … /* * Responses the controller sends as a result of * command requests */ #define RESPONSE_DEACTIVATE … #define RESPONSE_INITIALIZE … #define RESPONSE_RESOLUTION … #define RESPONSE_SETCONFIG … #define RESPONSE_SCANFREQ … #define RESPONSE_STATUS … /* * Notifications are sent by the touch controller without * being requested by the driver and include for example * touch indications */ #define NOTIFICATION_TOUCH … #define NOTIFICATION_BOOTCOMPLETE … #define NOTIFICATION_OVERRUN … #define NOTIFICATION_PROXIMITY … #define NOTIFICATION_INVALID_COMMAND … #define ZFORCE_REPORT_POINTS … #define ZFORCE_MAX_AREA … #define STATE_DOWN … #define STATE_MOVE … #define STATE_UP … #define SETCONFIG_DUALTOUCH … struct zforce_point { … }; /* * @client the i2c_client * @input the input device * @suspending in the process of going to suspend (don't emit wakeup * events for commands executed to suspend the device) * @suspended device suspended * @access_mutex serialize i2c-access, to keep multipart reads together * @command_done completion to wait for the command result * @command_mutex serialize commands sent to the ic * @command_waiting the id of the command that is currently waiting * for a result * @command_result returned result of the command */ struct zforce_ts { … }; static int zforce_command(struct zforce_ts *ts, u8 cmd) { … } static void zforce_reset_assert(struct zforce_ts *ts) { … } static void zforce_reset_deassert(struct zforce_ts *ts) { … } static int zforce_send_wait(struct zforce_ts *ts, const char *buf, int len) { … } static int zforce_command_wait(struct zforce_ts *ts, u8 cmd) { … } static int zforce_resolution(struct zforce_ts *ts, u16 x, u16 y) { … } static int zforce_scan_frequency(struct zforce_ts *ts, u16 idle, u16 finger, u16 stylus) { … } static int zforce_setconfig(struct zforce_ts *ts, char b1) { … } static int zforce_start(struct zforce_ts *ts) { … } static int zforce_stop(struct zforce_ts *ts) { … } static int zforce_touch_event(struct zforce_ts *ts, u8 *payload) { … } static int zforce_read_packet(struct zforce_ts *ts, u8 *buf) { … } static void zforce_complete(struct zforce_ts *ts, int cmd, int result) { … } static irqreturn_t zforce_irq(int irq, void *dev_id) { … } static irqreturn_t zforce_irq_thread(int irq, void *dev_id) { … } static int zforce_input_open(struct input_dev *dev) { … } static void zforce_input_close(struct input_dev *dev) { … } static int zforce_suspend(struct device *dev) { … } static int zforce_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(zforce_pm_ops, zforce_suspend, zforce_resume); static void zforce_reset(void *data) { … } static struct zforce_ts_platdata *zforce_parse_dt(struct device *dev) { … } static int zforce_probe(struct i2c_client *client) { … } static struct i2c_device_id zforce_idtable[] = …; MODULE_DEVICE_TABLE(i2c, zforce_idtable); #ifdef CONFIG_OF static const struct of_device_id zforce_dt_idtable[] = …; MODULE_DEVICE_TABLE(of, zforce_dt_idtable); #endif static struct i2c_driver zforce_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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