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Diffstat (limited to '')
| -rw-r--r-- | drivers/input/mouse/elantech.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h new file mode 100644 index 000000000..571e6ca11 --- /dev/null +++ b/drivers/input/mouse/elantech.h @@ -0,0 +1,205 @@ +/* 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 +#define ETP_ICBODY_QUERY 0x05 + +/* + * 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 char pattern; + unsigned int fw_version; + unsigned int ic_version; + unsigned int product_id; + 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 |