302 строки
8.4 KiB
C
302 строки
8.4 KiB
C
/*
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* Cypress APA trackpad with I2C interface
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*
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* Author: Dudley Du <dudl@cypress.com>
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*
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* Copyright (C) 2014 Cypress Semiconductor, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#ifndef _CYAPA_H
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#define _CYAPA_H
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#include <linux/firmware.h>
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/* APA trackpad firmware generation number. */
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#define CYAPA_GEN_UNKNOWN 0x00 /* unknown protocol. */
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#define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */
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#define CYAPA_GEN5 0x05 /* support TrueTouch GEN5 trackpad device. */
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#define CYAPA_NAME "Cypress APA Trackpad (cyapa)"
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/*
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* Macros for SMBus communication
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*/
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#define SMBUS_READ 0x01
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#define SMBUS_WRITE 0x00
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#define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1))
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#define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01))
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#define SMBUS_BYTE_BLOCK_CMD_MASK 0x80
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#define SMBUS_GROUP_BLOCK_CMD_MASK 0x40
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/* Commands for read/write registers of Cypress trackpad */
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#define CYAPA_CMD_SOFT_RESET 0x00
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#define CYAPA_CMD_POWER_MODE 0x01
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#define CYAPA_CMD_DEV_STATUS 0x02
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#define CYAPA_CMD_GROUP_DATA 0x03
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#define CYAPA_CMD_GROUP_CMD 0x04
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#define CYAPA_CMD_GROUP_QUERY 0x05
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#define CYAPA_CMD_BL_STATUS 0x06
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#define CYAPA_CMD_BL_HEAD 0x07
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#define CYAPA_CMD_BL_CMD 0x08
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#define CYAPA_CMD_BL_DATA 0x09
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#define CYAPA_CMD_BL_ALL 0x0a
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#define CYAPA_CMD_BLK_PRODUCT_ID 0x0b
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#define CYAPA_CMD_BLK_HEAD 0x0c
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#define CYAPA_CMD_MAX_BASELINE 0x0d
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#define CYAPA_CMD_MIN_BASELINE 0x0e
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#define BL_HEAD_OFFSET 0x00
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#define BL_DATA_OFFSET 0x10
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#define BL_STATUS_SIZE 3 /* Length of gen3 bootloader status registers */
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#define CYAPA_REG_MAP_SIZE 256
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/*
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* Gen3 Operational Device Status Register
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*
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* bit 7: Valid interrupt source
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* bit 6 - 4: Reserved
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* bit 3 - 2: Power status
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* bit 1 - 0: Device status
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*/
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#define REG_OP_STATUS 0x00
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#define OP_STATUS_SRC 0x80
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#define OP_STATUS_POWER 0x0c
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#define OP_STATUS_DEV 0x03
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#define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV)
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/*
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* Operational Finger Count/Button Flags Register
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*
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* bit 7 - 4: Number of touched finger
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* bit 3: Valid data
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* bit 2: Middle Physical Button
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* bit 1: Right Physical Button
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* bit 0: Left physical Button
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*/
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#define REG_OP_DATA1 0x01
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#define OP_DATA_VALID 0x08
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#define OP_DATA_MIDDLE_BTN 0x04
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#define OP_DATA_RIGHT_BTN 0x02
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#define OP_DATA_LEFT_BTN 0x01
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#define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \
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OP_DATA_LEFT_BTN)
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/*
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* Write-only command file register used to issue commands and
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* parameters to the bootloader.
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* The default value read from it is always 0x00.
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*/
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#define REG_BL_FILE 0x00
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#define BL_FILE 0x00
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/*
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* Bootloader Status Register
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*
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* bit 7: Busy
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* bit 6 - 5: Reserved
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* bit 4: Bootloader running
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* bit 3 - 2: Reserved
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* bit 1: Watchdog Reset
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* bit 0: Checksum valid
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*/
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#define REG_BL_STATUS 0x01
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#define BL_STATUS_REV_6_5 0x60
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#define BL_STATUS_BUSY 0x80
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#define BL_STATUS_RUNNING 0x10
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#define BL_STATUS_REV_3_2 0x0c
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#define BL_STATUS_WATCHDOG 0x02
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#define BL_STATUS_CSUM_VALID 0x01
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#define BL_STATUS_REV_MASK (BL_STATUS_WATCHDOG | BL_STATUS_REV_3_2 | \
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BL_STATUS_REV_6_5)
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/*
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* Bootloader Error Register
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*
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* bit 7: Invalid
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* bit 6: Invalid security key
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* bit 5: Bootloading
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* bit 4: Command checksum
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* bit 3: Flash protection error
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* bit 2: Flash checksum error
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* bit 1 - 0: Reserved
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*/
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#define REG_BL_ERROR 0x02
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#define BL_ERROR_INVALID 0x80
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#define BL_ERROR_INVALID_KEY 0x40
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#define BL_ERROR_BOOTLOADING 0x20
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#define BL_ERROR_CMD_CSUM 0x10
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#define BL_ERROR_FLASH_PROT 0x08
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#define BL_ERROR_FLASH_CSUM 0x04
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#define BL_ERROR_RESERVED 0x03
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#define BL_ERROR_NO_ERR_IDLE 0x00
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#define BL_ERROR_NO_ERR_ACTIVE (BL_ERROR_BOOTLOADING)
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#define CAPABILITY_BTN_SHIFT 3
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#define CAPABILITY_LEFT_BTN_MASK (0x01 << 3)
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#define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4)
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#define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5)
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#define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \
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CAPABILITY_RIGHT_BTN_MASK | \
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CAPABILITY_MIDDLE_BTN_MASK)
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#define PWR_MODE_MASK 0xfc
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#define PWR_MODE_FULL_ACTIVE (0x3f << 2)
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#define PWR_MODE_IDLE (0x03 << 2) /* Default rt suspend scanrate: 30ms */
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#define PWR_MODE_SLEEP (0x05 << 2) /* Default suspend scanrate: 50ms */
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#define PWR_MODE_BTN_ONLY (0x01 << 2)
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#define PWR_MODE_OFF (0x00 << 2)
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#define PWR_STATUS_MASK 0x0c
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#define PWR_STATUS_ACTIVE (0x03 << 2)
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#define PWR_STATUS_IDLE (0x02 << 2)
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#define PWR_STATUS_BTN_ONLY (0x01 << 2)
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#define PWR_STATUS_OFF (0x00 << 2)
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#define AUTOSUSPEND_DELAY 2000 /* unit : ms */
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#define UNINIT_SLEEP_TIME 0xFFFF
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#define UNINIT_PWR_MODE 0xFF
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#define BTN_ONLY_MODE_NAME "buttononly"
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#define OFF_MODE_NAME "off"
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/* The touch.id is used as the MT slot id, thus max MT slot is 15 */
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#define CYAPA_MAX_MT_SLOTS 15
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struct cyapa;
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typedef bool (*cb_sort)(struct cyapa *, u8 *, int);
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struct cyapa_dev_ops {
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int (*check_fw)(struct cyapa *, const struct firmware *);
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int (*bl_enter)(struct cyapa *);
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int (*bl_activate)(struct cyapa *);
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int (*bl_initiate)(struct cyapa *, const struct firmware *);
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int (*update_fw)(struct cyapa *, const struct firmware *);
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int (*bl_deactivate)(struct cyapa *);
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ssize_t (*show_baseline)(struct device *,
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struct device_attribute *, char *);
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ssize_t (*calibrate_store)(struct device *,
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struct device_attribute *, const char *, size_t);
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int (*initialize)(struct cyapa *cyapa);
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int (*state_parse)(struct cyapa *cyapa, u8 *reg_status, int len);
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int (*operational_check)(struct cyapa *cyapa);
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int (*irq_handler)(struct cyapa *);
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bool (*irq_cmd_handler)(struct cyapa *);
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int (*sort_empty_output_data)(struct cyapa *,
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u8 *, int *, cb_sort);
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int (*set_power_mode)(struct cyapa *, u8, u16);
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};
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struct cyapa_gen5_cmd_states {
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struct mutex cmd_lock;
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struct completion cmd_ready;
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atomic_t cmd_issued;
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u8 in_progress_cmd;
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bool is_irq_mode;
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cb_sort resp_sort_func;
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u8 *resp_data;
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int *resp_len;
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u8 irq_cmd_buf[CYAPA_REG_MAP_SIZE];
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u8 empty_buf[CYAPA_REG_MAP_SIZE];
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};
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union cyapa_cmd_states {
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struct cyapa_gen5_cmd_states gen5;
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};
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enum cyapa_state {
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CYAPA_STATE_NO_DEVICE,
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CYAPA_STATE_BL_BUSY,
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CYAPA_STATE_BL_IDLE,
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CYAPA_STATE_BL_ACTIVE,
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CYAPA_STATE_OP,
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CYAPA_STATE_GEN5_BL,
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CYAPA_STATE_GEN5_APP,
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};
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/* The main device structure */
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struct cyapa {
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enum cyapa_state state;
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u8 status[BL_STATUS_SIZE];
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bool operational; /* true: ready for data reporting; false: not. */
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struct i2c_client *client;
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struct input_dev *input;
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char phys[32]; /* Device physical location */
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bool irq_wake; /* Irq wake is enabled */
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bool smbus;
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/* power mode settings */
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u8 suspend_power_mode;
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u16 suspend_sleep_time;
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u8 runtime_suspend_power_mode;
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u16 runtime_suspend_sleep_time;
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u8 dev_pwr_mode;
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u16 dev_sleep_time;
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/* Read from query data region. */
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char product_id[16];
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u8 fw_maj_ver; /* Firmware major version. */
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u8 fw_min_ver; /* Firmware minor version. */
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u8 btn_capability;
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u8 gen;
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int max_abs_x;
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int max_abs_y;
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int physical_size_x;
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int physical_size_y;
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/* Used in ttsp and truetouch based trackpad devices. */
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u8 x_origin; /* X Axis Origin: 0 = left side; 1 = rigth side. */
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u8 y_origin; /* Y Axis Origin: 0 = top; 1 = bottom. */
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int electrodes_x; /* Number of electrodes on the X Axis*/
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int electrodes_y; /* Number of electrodes on the Y Axis*/
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int electrodes_rx; /* Number of Rx electrodes */
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int aligned_electrodes_rx; /* 4 aligned */
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int max_z;
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/*
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* Used to synchronize the access or update the device state.
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* And since update firmware and read firmware image process will take
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* quite long time, maybe more than 10 seconds, so use mutex_lock
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* to sync and wait other interface and detecting are done or ready.
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*/
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struct mutex state_sync_lock;
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const struct cyapa_dev_ops *ops;
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union cyapa_cmd_states cmd_states;
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};
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ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len,
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u8 *values);
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ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len,
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u8 *values);
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ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values);
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int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout);
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u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time);
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u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode);
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extern const char product_id[];
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extern const struct cyapa_dev_ops cyapa_gen3_ops;
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extern const struct cyapa_dev_ops cyapa_gen5_ops;
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#endif
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