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/*
* Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __SSP_SENSORHUB_H__
#define __SSP_SENSORHUB_H__
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/iio/common/ssp_sensors.h>
#include <linux/iio/iio.h>
#include <linux/spi/spi.h>
#define SSP_DEVICE_ID 0x55
#ifdef SSP_DBG
#define ssp_dbg(format, ...) pr_info("[SSP] "format, ##__VA_ARGS__)
#else
#define ssp_dbg(format, ...)
#endif
#define SSP_SW_RESET_TIME 3000
/* Sensor polling in ms */
#define SSP_DEFAULT_POLLING_DELAY 200
#define SSP_DEFAULT_RETRIES 3
#define SSP_DATA_PACKET_SIZE 960
#define SSP_HEADER_BUFFER_SIZE 4
enum {
SSP_KERNEL_BINARY = 0,
SSP_KERNEL_CRASHED_BINARY,
};
enum {
SSP_INITIALIZATION_STATE = 0,
SSP_NO_SENSOR_STATE,
SSP_ADD_SENSOR_STATE,
SSP_RUNNING_SENSOR_STATE,
};
/* Firmware download STATE */
enum {
SSP_FW_DL_STATE_FAIL = -1,
SSP_FW_DL_STATE_NONE = 0,
SSP_FW_DL_STATE_NEED_TO_SCHEDULE,
SSP_FW_DL_STATE_SCHEDULED,
SSP_FW_DL_STATE_DOWNLOADING,
SSP_FW_DL_STATE_SYNC,
SSP_FW_DL_STATE_DONE,
};
#define SSP_INVALID_REVISION 99999
#define SSP_INVALID_REVISION2 0xffffff
/* AP -> SSP Instruction */
#define SSP_MSG2SSP_INST_BYPASS_SENSOR_ADD 0xa1
#define SSP_MSG2SSP_INST_BYPASS_SENSOR_RM 0xa2
#define SSP_MSG2SSP_INST_REMOVE_ALL 0xa3
#define SSP_MSG2SSP_INST_CHANGE_DELAY 0xa4
#define SSP_MSG2SSP_INST_LIBRARY_ADD 0xb1
#define SSP_MSG2SSP_INST_LIBRARY_REMOVE 0xb2
#define SSP_MSG2SSP_INST_LIB_NOTI 0xb4
#define SSP_MSG2SSP_INST_LIB_DATA 0xc1
#define SSP_MSG2SSP_AP_MCU_SET_GYRO_CAL 0xcd
#define SSP_MSG2SSP_AP_MCU_SET_ACCEL_CAL 0xce
#define SSP_MSG2SSP_AP_STATUS_SHUTDOWN 0xd0
#define SSP_MSG2SSP_AP_STATUS_WAKEUP 0xd1
#define SSP_MSG2SSP_AP_STATUS_SLEEP 0xd2
#define SSP_MSG2SSP_AP_STATUS_RESUME 0xd3
#define SSP_MSG2SSP_AP_STATUS_SUSPEND 0xd4
#define SSP_MSG2SSP_AP_STATUS_RESET 0xd5
#define SSP_MSG2SSP_AP_STATUS_POW_CONNECTED 0xd6
#define SSP_MSG2SSP_AP_STATUS_POW_DISCONNECTED 0xd7
#define SSP_MSG2SSP_AP_TEMPHUMIDITY_CAL_DONE 0xda
#define SSP_MSG2SSP_AP_MCU_SET_DUMPMODE 0xdb
#define SSP_MSG2SSP_AP_MCU_DUMP_CHECK 0xdc
#define SSP_MSG2SSP_AP_MCU_BATCH_FLUSH 0xdd
#define SSP_MSG2SSP_AP_MCU_BATCH_COUNT 0xdf
#define SSP_MSG2SSP_AP_WHOAMI 0x0f
#define SSP_MSG2SSP_AP_FIRMWARE_REV 0xf0
#define SSP_MSG2SSP_AP_SENSOR_FORMATION 0xf1
#define SSP_MSG2SSP_AP_SENSOR_PROXTHRESHOLD 0xf2
#define SSP_MSG2SSP_AP_SENSOR_BARCODE_EMUL 0xf3
#define SSP_MSG2SSP_AP_SENSOR_SCANNING 0xf4
#define SSP_MSG2SSP_AP_SET_MAGNETIC_HWOFFSET 0xf5
#define SSP_MSG2SSP_AP_GET_MAGNETIC_HWOFFSET 0xf6
#define SSP_MSG2SSP_AP_SENSOR_GESTURE_CURRENT 0xf7
#define SSP_MSG2SSP_AP_GET_THERM 0xf8
#define SSP_MSG2SSP_AP_GET_BIG_DATA 0xf9
#define SSP_MSG2SSP_AP_SET_BIG_DATA 0xfa
#define SSP_MSG2SSP_AP_START_BIG_DATA 0xfb
#define SSP_MSG2SSP_AP_SET_MAGNETIC_STATIC_MATRIX 0xfd
#define SSP_MSG2SSP_AP_SENSOR_TILT 0xea
#define SSP_MSG2SSP_AP_MCU_SET_TIME 0xfe
#define SSP_MSG2SSP_AP_MCU_GET_TIME 0xff
#define SSP_MSG2SSP_AP_FUSEROM 0x01
/* voice data */
#define SSP_TYPE_WAKE_UP_VOICE_SERVICE 0x01
#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_AM 0x01
#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_GRAMMER 0x02
/* Factory Test */
#define SSP_ACCELEROMETER_FACTORY 0x80
#define SSP_GYROSCOPE_FACTORY 0x81
#define SSP_GEOMAGNETIC_FACTORY 0x82
#define SSP_PRESSURE_FACTORY 0x85
#define SSP_GESTURE_FACTORY 0x86
#define SSP_TEMPHUMIDITY_CRC_FACTORY 0x88
#define SSP_GYROSCOPE_TEMP_FACTORY 0x8a
#define SSP_GYROSCOPE_DPS_FACTORY 0x8b
#define SSP_MCU_FACTORY 0x8c
#define SSP_MCU_SLEEP_FACTORY 0x8d
/* SSP -> AP ACK about write CMD */
#define SSP_MSG_ACK 0x80 /* ACK from SSP to AP */
#define SSP_MSG_NAK 0x70 /* NAK from SSP to AP */
struct ssp_sensorhub_info {
char *fw_name;
char *fw_crashed_name;
unsigned int fw_rev;
const u8 * const mag_table;
const unsigned int mag_length;
};
/* ssp_msg options bit */
#define SSP_RW 0
#define SSP_INDEX 3
#define SSP_AP2HUB_READ 0
#define SSP_AP2HUB_WRITE 1
#define SSP_HUB2AP_WRITE 2
#define SSP_AP2HUB_READY 3
#define SSP_AP2HUB_RETURN 4
/**
* struct ssp_data - ssp platformdata structure
* @spi: spi device
* @sensorhub_info: info about sensorhub board specific features
* @wdt_timer: watchdog timer
* @work_wdt: watchdog work
* @work_firmware: firmware upgrade work queue
* @work_refresh: refresh work queue for reset request from MCU
* @shut_down: shut down flag
* @mcu_dump_mode: mcu dump mode for debug
* @time_syncing: time syncing indication flag
* @timestamp: previous time in ns calculated for time syncing
* @check_status: status table for each sensor
* @com_fail_cnt: communication fail count
* @reset_cnt: reset count
* @timeout_cnt: timeout count
* @available_sensors: available sensors seen by sensorhub (bit array)
* @cur_firm_rev: cached current firmware revision
* @last_resume_state: last AP resume/suspend state used to handle the PM
* state of ssp
* @last_ap_state: (obsolete) sleep notification for MCU
* @sensor_enable: sensor enable mask
* @delay_buf: data acquisition intervals table
* @batch_latency_buf: yet unknown but existing in communication protocol
* @batch_opt_buf: yet unknown but existing in communication protocol
* @accel_position: yet unknown but existing in communication protocol
* @mag_position: yet unknown but existing in communication protocol
* @fw_dl_state: firmware download state
* @comm_lock: lock protecting the handshake
* @pending_lock: lock protecting pending list and completion
* @mcu_reset_gpio: mcu reset line
* @ap_mcu_gpio: ap to mcu gpio line
* @mcu_ap_gpio: mcu to ap gpio line
* @pending_list: pending list for messages queued to be sent/read
* @sensor_devs: registered IIO devices table
* @enable_refcount: enable reference count for wdt (watchdog timer)
* @header_buffer: cache aligned buffer for packet header
*/
struct ssp_data {
struct spi_device *spi;
struct ssp_sensorhub_info *sensorhub_info;
struct timer_list wdt_timer;
struct work_struct work_wdt;
struct delayed_work work_refresh;
bool shut_down;
bool mcu_dump_mode;
bool time_syncing;
int64_t timestamp;
int check_status[SSP_SENSOR_MAX];
unsigned int com_fail_cnt;
unsigned int reset_cnt;
unsigned int timeout_cnt;
unsigned int available_sensors;
unsigned int cur_firm_rev;
char last_resume_state;
char last_ap_state;
unsigned int sensor_enable;
u32 delay_buf[SSP_SENSOR_MAX];
s32 batch_latency_buf[SSP_SENSOR_MAX];
s8 batch_opt_buf[SSP_SENSOR_MAX];
int accel_position;
int mag_position;
int fw_dl_state;
struct mutex comm_lock;
struct mutex pending_lock;
int mcu_reset_gpio;
int ap_mcu_gpio;
int mcu_ap_gpio;
struct list_head pending_list;
struct iio_dev *sensor_devs[SSP_SENSOR_MAX];
atomic_t enable_refcount;
__le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)]
____cacheline_aligned;
};
void ssp_clean_pending_list(struct ssp_data *data);
int ssp_command(struct ssp_data *data, char command, int arg);
int ssp_send_instruction(struct ssp_data *data, u8 inst, u8 sensor_type,
u8 *send_buf, u8 length);
int ssp_irq_msg(struct ssp_data *data);
int ssp_get_chipid(struct ssp_data *data);
int ssp_set_magnetic_matrix(struct ssp_data *data);
unsigned int ssp_get_sensor_scanning_info(struct ssp_data *data);
unsigned int ssp_get_firmware_rev(struct ssp_data *data);
int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay);
#endif /* __SSP_SENSORHUB_H__ */
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