/* * Cypress APA trackpad with I2C interface * * Author: Dudley Du * * Copyright (C) 2014 Cypress Semiconductor, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. */ #ifndef _CYAPA_H #define _CYAPA_H #include /* APA trackpad firmware generation number. */ #define CYAPA_GEN_UNKNOWN 0x00 /* unknown protocol. */ #define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */ #define CYAPA_GEN5 0x05 /* support TrueTouch GEN5 trackpad device. */ #define CYAPA_NAME "Cypress APA Trackpad (cyapa)" /* * Macros for SMBus communication */ #define SMBUS_READ 0x01 #define SMBUS_WRITE 0x00 #define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1)) #define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01)) #define SMBUS_BYTE_BLOCK_CMD_MASK 0x80 #define SMBUS_GROUP_BLOCK_CMD_MASK 0x40 /* Commands for read/write registers of Cypress trackpad */ #define CYAPA_CMD_SOFT_RESET 0x00 #define CYAPA_CMD_POWER_MODE 0x01 #define CYAPA_CMD_DEV_STATUS 0x02 #define CYAPA_CMD_GROUP_DATA 0x03 #define CYAPA_CMD_GROUP_CMD 0x04 #define CYAPA_CMD_GROUP_QUERY 0x05 #define CYAPA_CMD_BL_STATUS 0x06 #define CYAPA_CMD_BL_HEAD 0x07 #define CYAPA_CMD_BL_CMD 0x08 #define CYAPA_CMD_BL_DATA 0x09 #define CYAPA_CMD_BL_ALL 0x0a #define CYAPA_CMD_BLK_PRODUCT_ID 0x0b #define CYAPA_CMD_BLK_HEAD 0x0c #define CYAPA_CMD_MAX_BASELINE 0x0d #define CYAPA_CMD_MIN_BASELINE 0x0e #define BL_HEAD_OFFSET 0x00 #define BL_DATA_OFFSET 0x10 #define BL_STATUS_SIZE 3 /* Length of gen3 bootloader status registers */ #define CYAPA_REG_MAP_SIZE 256 /* * Gen3 Operational Device Status Register * * bit 7: Valid interrupt source * bit 6 - 4: Reserved * bit 3 - 2: Power status * bit 1 - 0: Device status */ #define REG_OP_STATUS 0x00 #define OP_STATUS_SRC 0x80 #define OP_STATUS_POWER 0x0c #define OP_STATUS_DEV 0x03 #define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV) /* * Operational Finger Count/Button Flags Register * * bit 7 - 4: Number of touched finger * bit 3: Valid data * bit 2: Middle Physical Button * bit 1: Right Physical Button * bit 0: Left physical Button */ #define REG_OP_DATA1 0x01 #define OP_DATA_VALID 0x08 #define OP_DATA_MIDDLE_BTN 0x04 #define OP_DATA_RIGHT_BTN 0x02 #define OP_DATA_LEFT_BTN 0x01 #define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \ OP_DATA_LEFT_BTN) /* * Write-only command file register used to issue commands and * parameters to the bootloader. * The default value read from it is always 0x00. */ #define REG_BL_FILE 0x00 #define BL_FILE 0x00 /* * Bootloader Status Register * * bit 7: Busy * bit 6 - 5: Reserved * bit 4: Bootloader running * bit 3 - 2: Reserved * bit 1: Watchdog Reset * bit 0: Checksum valid */ #define REG_BL_STATUS 0x01 #define BL_STATUS_REV_6_5 0x60 #define BL_STATUS_BUSY 0x80 #define BL_STATUS_RUNNING 0x10 #define BL_STATUS_REV_3_2 0x0c #define BL_STATUS_WATCHDOG 0x02 #define BL_STATUS_CSUM_VALID 0x01 #define BL_STATUS_REV_MASK (BL_STATUS_WATCHDOG | BL_STATUS_REV_3_2 | \ BL_STATUS_REV_6_5) /* * Bootloader Error Register * * bit 7: Invalid * bit 6: Invalid security key * bit 5: Bootloading * bit 4: Command checksum * bit 3: Flash protection error * bit 2: Flash checksum error * bit 1 - 0: Reserved */ #define REG_BL_ERROR 0x02 #define BL_ERROR_INVALID 0x80 #define BL_ERROR_INVALID_KEY 0x40 #define BL_ERROR_BOOTLOADING 0x20 #define BL_ERROR_CMD_CSUM 0x10 #define BL_ERROR_FLASH_PROT 0x08 #define BL_ERROR_FLASH_CSUM 0x04 #define BL_ERROR_RESERVED 0x03 #define BL_ERROR_NO_ERR_IDLE 0x00 #define BL_ERROR_NO_ERR_ACTIVE (BL_ERROR_BOOTLOADING) #define CAPABILITY_BTN_SHIFT 3 #define CAPABILITY_LEFT_BTN_MASK (0x01 << 3) #define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4) #define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5) #define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \ CAPABILITY_RIGHT_BTN_MASK | \ CAPABILITY_MIDDLE_BTN_MASK) #define PWR_MODE_MASK 0xfc #define PWR_MODE_FULL_ACTIVE (0x3f << 2) #define PWR_MODE_IDLE (0x03 << 2) /* Default rt suspend scanrate: 30ms */ #define PWR_MODE_SLEEP (0x05 << 2) /* Default suspend scanrate: 50ms */ #define PWR_MODE_BTN_ONLY (0x01 << 2) #define PWR_MODE_OFF (0x00 << 2) #define PWR_STATUS_MASK 0x0c #define PWR_STATUS_ACTIVE (0x03 << 2) #define PWR_STATUS_IDLE (0x02 << 2) #define PWR_STATUS_BTN_ONLY (0x01 << 2) #define PWR_STATUS_OFF (0x00 << 2) #define AUTOSUSPEND_DELAY 2000 /* unit : ms */ #define UNINIT_SLEEP_TIME 0xFFFF #define UNINIT_PWR_MODE 0xFF #define BTN_ONLY_MODE_NAME "buttononly" #define OFF_MODE_NAME "off" /* The touch.id is used as the MT slot id, thus max MT slot is 15 */ #define CYAPA_MAX_MT_SLOTS 15 struct cyapa; typedef bool (*cb_sort)(struct cyapa *, u8 *, int); struct cyapa_dev_ops { int (*check_fw)(struct cyapa *, const struct firmware *); int (*bl_enter)(struct cyapa *); int (*bl_activate)(struct cyapa *); int (*bl_initiate)(struct cyapa *, const struct firmware *); int (*update_fw)(struct cyapa *, const struct firmware *); int (*bl_deactivate)(struct cyapa *); ssize_t (*show_baseline)(struct device *, struct device_attribute *, char *); ssize_t (*calibrate_store)(struct device *, struct device_attribute *, const char *, size_t); int (*initialize)(struct cyapa *cyapa); int (*state_parse)(struct cyapa *cyapa, u8 *reg_status, int len); int (*operational_check)(struct cyapa *cyapa); int (*irq_handler)(struct cyapa *); bool (*irq_cmd_handler)(struct cyapa *); int (*sort_empty_output_data)(struct cyapa *, u8 *, int *, cb_sort); int (*set_power_mode)(struct cyapa *, u8, u16); }; struct cyapa_gen5_cmd_states { struct mutex cmd_lock; struct completion cmd_ready; atomic_t cmd_issued; u8 in_progress_cmd; bool is_irq_mode; cb_sort resp_sort_func; u8 *resp_data; int *resp_len; u8 irq_cmd_buf[CYAPA_REG_MAP_SIZE]; u8 empty_buf[CYAPA_REG_MAP_SIZE]; }; union cyapa_cmd_states { struct cyapa_gen5_cmd_states gen5; }; enum cyapa_state { CYAPA_STATE_NO_DEVICE, CYAPA_STATE_BL_BUSY, CYAPA_STATE_BL_IDLE, CYAPA_STATE_BL_ACTIVE, CYAPA_STATE_OP, CYAPA_STATE_GEN5_BL, CYAPA_STATE_GEN5_APP, }; /* The main device structure */ struct cyapa { enum cyapa_state state; u8 status[BL_STATUS_SIZE]; bool operational; /* true: ready for data reporting; false: not. */ struct i2c_client *client; struct input_dev *input; char phys[32]; /* Device physical location */ bool irq_wake; /* Irq wake is enabled */ bool smbus; /* power mode settings */ u8 suspend_power_mode; u16 suspend_sleep_time; u8 dev_pwr_mode; u16 dev_sleep_time; /* Read from query data region. */ char product_id[16]; u8 fw_maj_ver; /* Firmware major version. */ u8 fw_min_ver; /* Firmware minor version. */ u8 btn_capability; u8 gen; int max_abs_x; int max_abs_y; int physical_size_x; int physical_size_y; /* Used in ttsp and truetouch based trackpad devices. */ u8 x_origin; /* X Axis Origin: 0 = left side; 1 = rigth side. */ u8 y_origin; /* Y Axis Origin: 0 = top; 1 = bottom. */ int electrodes_x; /* Number of electrodes on the X Axis*/ int electrodes_y; /* Number of electrodes on the Y Axis*/ int max_z; /* * Used to synchronize the access or update the device state. * And since update firmware and read firmware image process will take * quite long time, maybe more than 10 seconds, so use mutex_lock * to sync and wait other interface and detecting are done or ready. */ struct mutex state_sync_lock; const struct cyapa_dev_ops *ops; union cyapa_cmd_states cmd_states; }; ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len, u8 *values); ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len, u8 *values); ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values); int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout); u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time); u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode); extern const char product_id[]; extern const struct cyapa_dev_ops cyapa_gen3_ops; #endif