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/* 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
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