| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Elantech Touchpad driver (v6) |
| * |
| * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> |
| * |
| * Trademarks are the property of their respective owners. |
| */ |
| |
| #ifndef _ELANTECH_H |
| #define _ELANTECH_H |
| |
| /* |
| * Command values for Synaptics style queries |
| */ |
| #define ETP_FW_ID_QUERY 0x00 |
| #define ETP_FW_VERSION_QUERY 0x01 |
| #define ETP_CAPABILITIES_QUERY 0x02 |
| #define ETP_SAMPLE_QUERY 0x03 |
| #define ETP_RESOLUTION_QUERY 0x04 |
| |
| /* |
| * Command values for register reading or writing |
| */ |
| #define ETP_REGISTER_READ 0x10 |
| #define ETP_REGISTER_WRITE 0x11 |
| #define ETP_REGISTER_READWRITE 0x00 |
| |
| /* |
| * Hardware version 2 custom PS/2 command value |
| */ |
| #define ETP_PS2_CUSTOM_COMMAND 0xf8 |
| |
| /* |
| * Times to retry a ps2_command and millisecond delay between tries |
| */ |
| #define ETP_PS2_COMMAND_TRIES 3 |
| #define ETP_PS2_COMMAND_DELAY 500 |
| |
| /* |
| * Times to try to read back a register and millisecond delay between tries |
| */ |
| #define ETP_READ_BACK_TRIES 5 |
| #define ETP_READ_BACK_DELAY 2000 |
| |
| /* |
| * Register bitmasks for hardware version 1 |
| */ |
| #define ETP_R10_ABSOLUTE_MODE 0x04 |
| #define ETP_R11_4_BYTE_MODE 0x02 |
| |
| /* |
| * Capability bitmasks |
| */ |
| #define ETP_CAP_HAS_ROCKER 0x04 |
| |
| /* |
| * One hard to find application note states that X axis range is 0 to 576 |
| * and Y axis range is 0 to 384 for harware version 1. |
| * Edge fuzz might be necessary because of bezel around the touchpad |
| */ |
| #define ETP_EDGE_FUZZ_V1 32 |
| |
| #define ETP_XMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) |
| #define ETP_XMAX_V1 (576 - ETP_EDGE_FUZZ_V1) |
| #define ETP_YMIN_V1 ( 0 + ETP_EDGE_FUZZ_V1) |
| #define ETP_YMAX_V1 (384 - ETP_EDGE_FUZZ_V1) |
| |
| /* |
| * The resolution for older v2 hardware doubled. |
| * (newer v2's firmware provides command so we can query) |
| */ |
| #define ETP_XMIN_V2 0 |
| #define ETP_XMAX_V2 1152 |
| #define ETP_YMIN_V2 0 |
| #define ETP_YMAX_V2 768 |
| |
| #define ETP_PMIN_V2 0 |
| #define ETP_PMAX_V2 255 |
| #define ETP_WMIN_V2 0 |
| #define ETP_WMAX_V2 15 |
| |
| /* |
| * v3 hardware has 2 kinds of packet types, |
| * v4 hardware has 3. |
| */ |
| #define PACKET_UNKNOWN 0x01 |
| #define PACKET_DEBOUNCE 0x02 |
| #define PACKET_V3_HEAD 0x03 |
| #define PACKET_V3_TAIL 0x04 |
| #define PACKET_V4_HEAD 0x05 |
| #define PACKET_V4_MOTION 0x06 |
| #define PACKET_V4_STATUS 0x07 |
| #define PACKET_TRACKPOINT 0x08 |
| |
| /* |
| * track up to 5 fingers for v4 hardware |
| */ |
| #define ETP_MAX_FINGERS 5 |
| |
| /* |
| * weight value for v4 hardware |
| */ |
| #define ETP_WEIGHT_VALUE 5 |
| |
| /* |
| * Bus information on 3rd byte of query ETP_RESOLUTION_QUERY(0x04) |
| */ |
| #define ETP_BUS_PS2_ONLY 0 |
| #define ETP_BUS_SMB_ALERT_ONLY 1 |
| #define ETP_BUS_SMB_HST_NTFY_ONLY 2 |
| #define ETP_BUS_PS2_SMB_ALERT 3 |
| #define ETP_BUS_PS2_SMB_HST_NTFY 4 |
| |
| /* |
| * New ICs are either using SMBus Host Notify or just plain PS2. |
| * |
| * ETP_FW_VERSION_QUERY is: |
| * Byte 1: |
| * - bit 0..3: IC BODY |
| * Byte 2: |
| * - bit 4: HiddenButton |
| * - bit 5: PS2_SMBUS_NOTIFY |
| * - bit 6: PS2CRCCheck |
| */ |
| #define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version) \ |
| ((((fw_version) & 0x0f2000) == 0x0f2000) && \ |
| ((fw_version) & 0x0000ff) > 0) |
| |
| /* |
| * The base position for one finger, v4 hardware |
| */ |
| struct finger_pos { |
| unsigned int x; |
| unsigned int y; |
| }; |
| |
| struct elantech_device_info { |
| unsigned char capabilities[3]; |
| unsigned char samples[3]; |
| unsigned char debug; |
| unsigned char hw_version; |
| unsigned int fw_version; |
| unsigned int x_min; |
| unsigned int y_min; |
| unsigned int x_max; |
| unsigned int y_max; |
| unsigned int x_res; |
| unsigned int y_res; |
| unsigned int x_traces; |
| unsigned int y_traces; |
| unsigned int width; |
| unsigned int bus; |
| bool paritycheck; |
| bool jumpy_cursor; |
| bool reports_pressure; |
| bool crc_enabled; |
| bool set_hw_resolution; |
| bool has_trackpoint; |
| bool has_middle_button; |
| int (*send_cmd)(struct psmouse *psmouse, unsigned char c, |
| unsigned char *param); |
| }; |
| |
| struct elantech_data { |
| struct input_dev *tp_dev; /* Relative device for trackpoint */ |
| char tp_phys[32]; |
| unsigned char reg_07; |
| unsigned char reg_10; |
| unsigned char reg_11; |
| unsigned char reg_20; |
| unsigned char reg_21; |
| unsigned char reg_22; |
| unsigned char reg_23; |
| unsigned char reg_24; |
| unsigned char reg_25; |
| unsigned char reg_26; |
| unsigned int single_finger_reports; |
| unsigned int y_max; |
| unsigned int width; |
| struct finger_pos mt[ETP_MAX_FINGERS]; |
| unsigned char parity[256]; |
| struct elantech_device_info info; |
| void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate); |
| }; |
| |
| int elantech_detect(struct psmouse *psmouse, bool set_properties); |
| int elantech_init_ps2(struct psmouse *psmouse); |
| |
| #ifdef CONFIG_MOUSE_PS2_ELANTECH |
| int elantech_init(struct psmouse *psmouse); |
| #else |
| static inline int elantech_init(struct psmouse *psmouse) |
| { |
| return -ENOSYS; |
| } |
| #endif /* CONFIG_MOUSE_PS2_ELANTECH */ |
| |
| int elantech_init_smbus(struct psmouse *psmouse); |
| |
| #endif |
