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linux/drivers/input/mouse/cyapa.h
Dudley Du 3cd4786943 Input: cyapa - fix for losing events during device power transitions 
When changing the scan rate as part of runtime-resume process we may lose
some of the events, because:

1) for gen3 trackpads, the driver must msleep() some time to ensure that
the device is ready to accept next command;

2) for gen5 and later trackpads, the queue dumping function will simply
ignore the events when waiting for the set power mode command response.

The solution is to keep polling and report those valid events when the set
power mode command is in progress.

Signed-off-by: Dudley Du <dudl@cypress.com>
Tested-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2016-03-04 11:32:13 -08:00

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/*
* Cypress APA trackpad with I2C interface
*
* Author: Dudley Du <dudl@cypress.com>
*
* Copyright (C) 2014-2015 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 <linux/firmware.h>
/* 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_GEN6 0x06 /* support TrueTouch GEN6 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 BTN_ONLY_MODE_NAME "buttononly"
#define OFF_MODE_NAME "off"
/* Common macros for PIP interface. */
#define PIP_HID_DESCRIPTOR_ADDR 0x0001
#define PIP_REPORT_DESCRIPTOR_ADDR 0x0002
#define PIP_INPUT_REPORT_ADDR 0x0003
#define PIP_OUTPUT_REPORT_ADDR 0x0004
#define PIP_CMD_DATA_ADDR 0x0006
#define PIP_RETRIEVE_DATA_STRUCTURE 0x24
#define PIP_CMD_CALIBRATE 0x28
#define PIP_BL_CMD_VERIFY_APP_INTEGRITY 0x31
#define PIP_BL_CMD_GET_BL_INFO 0x38
#define PIP_BL_CMD_PROGRAM_VERIFY_ROW 0x39
#define PIP_BL_CMD_LAUNCH_APP 0x3b
#define PIP_BL_CMD_INITIATE_BL 0x48
#define PIP_INVALID_CMD 0xff
#define PIP_HID_DESCRIPTOR_SIZE 32
#define PIP_HID_APP_REPORT_ID 0xf7
#define PIP_HID_BL_REPORT_ID 0xff
#define PIP_BL_CMD_REPORT_ID 0x40
#define PIP_BL_RESP_REPORT_ID 0x30
#define PIP_APP_CMD_REPORT_ID 0x2f
#define PIP_APP_RESP_REPORT_ID 0x1f
#define PIP_READ_SYS_INFO_CMD_LENGTH 7
#define PIP_BL_READ_APP_INFO_CMD_LENGTH 13
#define PIP_MIN_BL_CMD_LENGTH 13
#define PIP_MIN_BL_RESP_LENGTH 11
#define PIP_MIN_APP_CMD_LENGTH 7
#define PIP_MIN_APP_RESP_LENGTH 5
#define PIP_UNSUPPORTED_CMD_RESP_LENGTH 6
#define PIP_READ_SYS_INFO_RESP_LENGTH 71
#define PIP_BL_APP_INFO_RESP_LENGTH 30
#define PIP_BL_GET_INFO_RESP_LENGTH 19
#define PIP_BL_PLATFORM_VER_SHIFT 4
#define PIP_BL_PLATFORM_VER_MASK 0x0f
#define PIP_PRODUCT_FAMILY_MASK 0xf000
#define PIP_PRODUCT_FAMILY_TRACKPAD 0x1000
#define PIP_DEEP_SLEEP_STATE_ON 0x00
#define PIP_DEEP_SLEEP_STATE_OFF 0x01
#define PIP_DEEP_SLEEP_STATE_MASK 0x03
#define PIP_APP_DEEP_SLEEP_REPORT_ID 0xf0
#define PIP_DEEP_SLEEP_RESP_LENGTH 5
#define PIP_DEEP_SLEEP_OPCODE 0x08
#define PIP_DEEP_SLEEP_OPCODE_MASK 0x0f
#define PIP_RESP_LENGTH_OFFSET 0
#define PIP_RESP_LENGTH_SIZE 2
#define PIP_RESP_REPORT_ID_OFFSET 2
#define PIP_RESP_RSVD_OFFSET 3
#define PIP_RESP_RSVD_KEY 0x00
#define PIP_RESP_BL_SOP_OFFSET 4
#define PIP_SOP_KEY 0x01 /* Start of Packet */
#define PIP_EOP_KEY 0x17 /* End of Packet */
#define PIP_RESP_APP_CMD_OFFSET 4
#define GET_PIP_CMD_CODE(reg) ((reg) & 0x7f)
#define PIP_RESP_STATUS_OFFSET 5
#define VALID_CMD_RESP_HEADER(resp, cmd) \
(((resp)[PIP_RESP_REPORT_ID_OFFSET] == PIP_APP_RESP_REPORT_ID) && \
((resp)[PIP_RESP_RSVD_OFFSET] == PIP_RESP_RSVD_KEY) && \
(GET_PIP_CMD_CODE((resp)[PIP_RESP_APP_CMD_OFFSET]) == (cmd)))
#define PIP_CMD_COMPLETE_SUCCESS(resp_data) \
((resp_data)[PIP_RESP_STATUS_OFFSET] == 0x00)
/* Variables to record latest gen5 trackpad power states. */
#define UNINIT_SLEEP_TIME 0xffff
#define UNINIT_PWR_MODE 0xff
#define PIP_DEV_SET_PWR_STATE(cyapa, s) ((cyapa)->dev_pwr_mode = (s))
#define PIP_DEV_GET_PWR_STATE(cyapa) ((cyapa)->dev_pwr_mode)
#define PIP_DEV_SET_SLEEP_TIME(cyapa, t) ((cyapa)->dev_sleep_time = (t))
#define PIP_DEV_GET_SLEEP_TIME(cyapa) ((cyapa)->dev_sleep_time)
#define PIP_DEV_UNINIT_SLEEP_TIME(cyapa) \
(((cyapa)->dev_sleep_time) == UNINIT_SLEEP_TIME)
/* 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);
enum cyapa_pm_stage {
CYAPA_PM_DEACTIVE,
CYAPA_PM_ACTIVE,
CYAPA_PM_SUSPEND,
CYAPA_PM_RESUME,
CYAPA_PM_RUNTIME_SUSPEND,
CYAPA_PM_RUNTIME_RESUME,
};
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, enum cyapa_pm_stage);
int (*set_proximity)(struct cyapa *, bool);
};
struct cyapa_pip_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;
enum cyapa_pm_stage pm_stage;
struct mutex pm_stage_lock;
u8 irq_cmd_buf[CYAPA_REG_MAP_SIZE];
u8 empty_buf[CYAPA_REG_MAP_SIZE];
};
union cyapa_cmd_states {
struct cyapa_pip_cmd_states pip;
};
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,
CYAPA_STATE_GEN6_BL,
CYAPA_STATE_GEN6_APP,
};
struct gen6_interval_setting {
u16 active_interval;
u16 lp1_interval;
u16 lp2_interval;
};
/* 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 regulator *vcc;
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 runtime_suspend_power_mode;
u16 runtime_suspend_sleep_time;
u8 dev_pwr_mode;
u16 dev_sleep_time;
struct gen6_interval_setting gen6_interval_setting;
/* Read from query data region. */
char product_id[16];
u8 platform_ver; /* Platform version. */
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 = right 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 electrodes_rx; /* Number of Rx electrodes */
int aligned_electrodes_rx; /* 4 aligned */
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);
ssize_t cyapa_i2c_pip_read(struct cyapa *cyapa, u8 *buf, size_t size);
ssize_t cyapa_i2c_pip_write(struct cyapa *cyapa, u8 *buf, size_t size);
int cyapa_empty_pip_output_data(struct cyapa *cyapa,
u8 *buf, int *len, cb_sort func);
int cyapa_i2c_pip_cmd_irq_sync(struct cyapa *cyapa,
u8 *cmd, int cmd_len,
u8 *resp_data, int *resp_len,
unsigned long timeout,
cb_sort func,
bool irq_mode);
int cyapa_pip_state_parse(struct cyapa *cyapa, u8 *reg_data, int len);
bool cyapa_pip_sort_system_info_data(struct cyapa *cyapa, u8 *buf, int len);
bool cyapa_sort_tsg_pip_bl_resp_data(struct cyapa *cyapa, u8 *data, int len);
int cyapa_pip_deep_sleep(struct cyapa *cyapa, u8 state);
bool cyapa_sort_tsg_pip_app_resp_data(struct cyapa *cyapa, u8 *data, int len);
int cyapa_pip_bl_exit(struct cyapa *cyapa);
int cyapa_pip_bl_enter(struct cyapa *cyapa);
bool cyapa_is_pip_bl_mode(struct cyapa *cyapa);
bool cyapa_is_pip_app_mode(struct cyapa *cyapa);
int cyapa_pip_cmd_state_initialize(struct cyapa *cyapa);
int cyapa_pip_resume_scanning(struct cyapa *cyapa);
int cyapa_pip_suspend_scanning(struct cyapa *cyapa);
int cyapa_pip_check_fw(struct cyapa *cyapa, const struct firmware *fw);
int cyapa_pip_bl_initiate(struct cyapa *cyapa, const struct firmware *fw);
int cyapa_pip_do_fw_update(struct cyapa *cyapa, const struct firmware *fw);
int cyapa_pip_bl_activate(struct cyapa *cyapa);
int cyapa_pip_bl_deactivate(struct cyapa *cyapa);
ssize_t cyapa_pip_do_calibrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count);
int cyapa_pip_set_proximity(struct cyapa *cyapa, bool enable);
bool cyapa_pip_irq_cmd_handler(struct cyapa *cyapa);
int cyapa_pip_irq_handler(struct cyapa *cyapa);
extern u8 pip_read_sys_info[];
extern u8 pip_bl_read_app_info[];
extern const char product_id[];
extern const struct cyapa_dev_ops cyapa_gen3_ops;
extern const struct cyapa_dev_ops cyapa_gen5_ops;
extern const struct cyapa_dev_ops cyapa_gen6_ops;
#endif
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