// SPDX-License-Identifier: GPL-2.0-only /* * Elantech Touchpad driver (v6) * * Copyright (C) 2007-2009 Arjan Opmeer <[email protected]> * * Trademarks are the property of their respective owners. */ #include <linux/delay.h> #include <linux/dmi.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/platform_device.h> #include <linux/serio.h> #include <linux/libps2.h> #include <linux/unaligned.h> #include "psmouse.h" #include "elantech.h" #include "elan_i2c.h" #define elantech_debug(fmt, ...) … /* * Send a Synaptics style sliced query command */ static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { … } /* * V3 and later support this fast command */ static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) { … } /* * A retrying version of ps2_command */ static int elantech_ps2_command(struct psmouse *psmouse, unsigned char *param, int command) { … } /* * Send an Elantech style special command to read 3 bytes from a register */ static int elantech_read_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { … } /* * Send an Elantech style special command to write a register with a parameter */ static int elantech_write_reg_params(struct psmouse *psmouse, u8 reg, u8 *param) { … } /* * Send an Elantech style special command to read a value from a register */ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, unsigned char *val) { … } /* * Send an Elantech style special command to write a register with a value */ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, unsigned char val) { … } /* * Dump a complete mouse movement packet to the syslog */ static void elantech_packet_dump(struct psmouse *psmouse) { … } /* * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in * fw_version for this is based on the following fw_version & caps table: * * Laptop-model: fw_version: caps: buttons: * Acer S3 0x461f00 10, 13, 0e clickpad * Acer S7-392 0x581f01 50, 17, 0d clickpad * Acer V5-131 0x461f02 01, 16, 0c clickpad * Acer V5-551 0x461f00 ? clickpad * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons * Asus TP500LN 0x381f17 10, 14, 0e clickpad * Asus X750JN 0x381f17 10, 14, 0e clickpad * Asus UX31 0x361f00 20, 15, 0e clickpad * Asus UX32VD 0x361f02 00, 15, 0e clickpad * Avatar AVIU-145A2 0x361f00 ? clickpad * Fujitsu CELSIUS H760 0x570f02 40, 14, 0c 3 hw buttons (**) * Fujitsu CELSIUS H780 0x5d0f02 41, 16, 0d 3 hw buttons (**) * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**) * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad * Samsung NP900X3E-A02 0x575f03 ? clickpad * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons * Samsung RF710 0x450f00 ? 2 hw buttons * System76 Pangolin 0x250f01 ? 2 hw buttons * (*) + 3 trackpoint buttons * (**) + 0 trackpoint buttons * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps */ static inline int elantech_is_buttonpad(struct elantech_device_info *info) { … } /* * Interpret complete data packets and report absolute mode input events for * hardware version 1. (4 byte packets) */ static void elantech_report_absolute_v1(struct psmouse *psmouse) { … } static void elantech_set_slot(struct input_dev *dev, int slot, bool active, unsigned int x, unsigned int y) { … } /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ static void elantech_report_semi_mt_data(struct input_dev *dev, unsigned int num_fingers, unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2) { … } /* * Interpret complete data packets and report absolute mode input events for * hardware version 2. (6 byte packets) */ static void elantech_report_absolute_v2(struct psmouse *psmouse) { … } static void elantech_report_trackpoint(struct psmouse *psmouse, int packet_type) { … } /* * Interpret complete data packets and report absolute mode input events for * hardware version 3. (12 byte packets for two fingers) */ static void elantech_report_absolute_v3(struct psmouse *psmouse, int packet_type) { … } static void elantech_input_sync_v4(struct psmouse *psmouse) { … } static void process_packet_status_v4(struct psmouse *psmouse) { … } static void process_packet_head_v4(struct psmouse *psmouse) { … } static void process_packet_motion_v4(struct psmouse *psmouse) { … } static void elantech_report_absolute_v4(struct psmouse *psmouse, int packet_type) { … } static int elantech_packet_check_v1(struct psmouse *psmouse) { … } static int elantech_debounce_check_v2(struct psmouse *psmouse) { … } static int elantech_packet_check_v2(struct psmouse *psmouse) { … } /* * We check the constant bits to determine what packet type we get, * so packet checking is mandatory for v3 and later hardware. */ static int elantech_packet_check_v3(struct psmouse *psmouse) { … } static int elantech_packet_check_v4(struct psmouse *psmouse) { … } /* * Process byte stream from mouse and handle complete packets */ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) { … } /* * This writes the reg_07 value again to the hardware at the end of every * set_rate call because the register loses its value. reg_07 allows setting * absolute mode on v4 hardware */ static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse, unsigned int rate) { … } /* * Put the touchpad into absolute mode */ static int elantech_set_absolute_mode(struct psmouse *psmouse) { … } /* * (value from firmware) * 10 + 790 = dpi * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) */ static unsigned int elantech_convert_res(unsigned int val) { … } static int elantech_get_resolution_v4(struct psmouse *psmouse, unsigned int *x_res, unsigned int *y_res, unsigned int *bus) { … } static void elantech_set_buttonpad_prop(struct psmouse *psmouse) { … } /* * Some hw_version 4 models do have a middle button */ static const struct dmi_system_id elantech_dmi_has_middle_button[] = …; /* * Set the appropriate event bits for the input subsystem */ static int elantech_set_input_params(struct psmouse *psmouse) { … } struct elantech_attr_data { … }; /* * Display a register value by reading a sysfs entry */ static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, char *buf) { … } /* * Write a register value by writing a sysfs entry */ static ssize_t elantech_set_int_attr(struct psmouse *psmouse, void *data, const char *buf, size_t count) { … } #define ELANTECH_INT_ATTR(_name, _register) … #define ELANTECH_INFO_ATTR(_name) … ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INT_ATTR(…); ELANTECH_INFO_ATTR(…); ELANTECH_INFO_ATTR(…); ELANTECH_INFO_ATTR(…); static struct attribute *elantech_attrs[] = …; static const struct attribute_group elantech_attr_group = …; static bool elantech_is_signature_valid(const unsigned char *param) { … } /* * Use magic knock to detect Elantech touchpad */ int elantech_detect(struct psmouse *psmouse, bool set_properties) { … } /* * Clean up sysfs entries when disconnecting */ static void elantech_disconnect(struct psmouse *psmouse) { … } /* * Some hw_version 4 models fail to properly activate absolute mode on * resume without going through disable/enable cycle. */ static const struct dmi_system_id elantech_needs_reenable[] = …; /* * Put the touchpad back into absolute mode when reconnecting */ static int elantech_reconnect(struct psmouse *psmouse) { … } /* * Some hw_version 4 models do not work with crc_disabled */ static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = …; /* * Some hw_version 3 models go into error state when we try to set * bit 3 and/or bit 1 of r10. */ static const struct dmi_system_id no_hw_res_dmi_table[] = …; /* * Change Report id 0x5E to 0x5F. */ static int elantech_change_report_id(struct psmouse *psmouse) { … } /* * determine hardware version and set some properties according to it. */ static int elantech_set_properties(struct elantech_device_info *info) { … } static int elantech_query_info(struct psmouse *psmouse, struct elantech_device_info *info) { … } #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) /* * The newest Elantech device can use a secondary bus (over SMBus) which * provides a better bandwidth and allow a better control of the touchpads. * This is used to decide if we need to use this bus or not. */ enum { … }; static int elantech_smbus = …; module_param_named(elantech_smbus, elantech_smbus, int, 0644); MODULE_PARM_DESC(…) …; static const char * const i2c_blacklist_pnp_ids[] = …; static int elantech_create_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { … } /* * elantech_setup_smbus - called once the PS/2 devices are enumerated * and decides to instantiate a SMBus InterTouch device. */ static int elantech_setup_smbus(struct psmouse *psmouse, struct elantech_device_info *info, bool leave_breadcrumbs) { … } static bool elantech_use_host_notify(struct psmouse *psmouse, struct elantech_device_info *info) { … } int elantech_init_smbus(struct psmouse *psmouse) { … } #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ /* * Initialize the touchpad and create sysfs entries */ static int elantech_setup_ps2(struct psmouse *psmouse, struct elantech_device_info *info) { … } int elantech_init_ps2(struct psmouse *psmouse) { … } int elantech_init(struct psmouse *psmouse) { … }
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