forked from Minki/linux
50dd64d57e
Sensorhub is MCU dedicated to collect data and manage several sensors. Sensorhub is a spi device which provides a layer for IIO devices. It provides some data parsing and common mechanism for sensorhub sensors. Adds common sensorhub library for sensorhub driver and iio drivers which uses sensorhub MCU to communicate with sensors. Signed-off-by: Karol Wrona <k.wrona@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
258 lines
7.8 KiB
C
258 lines
7.8 KiB
C
/*
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* Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __SSP_SENSORHUB_H__
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#define __SSP_SENSORHUB_H__
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/iio/common/ssp_sensors.h>
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#include <linux/iio/iio.h>
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#include <linux/spi/spi.h>
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#define SSP_DEVICE_ID 0x55
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#ifdef SSP_DBG
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#define ssp_dbg(format, ...) pr_info("[SSP] "format, ##__VA_ARGS__)
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#else
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#define ssp_dbg(format, ...)
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#endif
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#define SSP_SW_RESET_TIME 3000
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/* Sensor polling in ms */
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#define SSP_DEFAULT_POLLING_DELAY 200
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#define SSP_DEFAULT_RETRIES 3
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#define SSP_DATA_PACKET_SIZE 960
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#define SSP_HEADER_BUFFER_SIZE 4
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enum {
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SSP_KERNEL_BINARY = 0,
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SSP_KERNEL_CRASHED_BINARY,
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};
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enum {
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SSP_INITIALIZATION_STATE = 0,
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SSP_NO_SENSOR_STATE,
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SSP_ADD_SENSOR_STATE,
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SSP_RUNNING_SENSOR_STATE,
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};
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/* Firmware download STATE */
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enum {
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SSP_FW_DL_STATE_FAIL = -1,
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SSP_FW_DL_STATE_NONE = 0,
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SSP_FW_DL_STATE_NEED_TO_SCHEDULE,
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SSP_FW_DL_STATE_SCHEDULED,
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SSP_FW_DL_STATE_DOWNLOADING,
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SSP_FW_DL_STATE_SYNC,
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SSP_FW_DL_STATE_DONE,
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};
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#define SSP_INVALID_REVISION 99999
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#define SSP_INVALID_REVISION2 0xffffff
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/* AP -> SSP Instruction */
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#define SSP_MSG2SSP_INST_BYPASS_SENSOR_ADD 0xa1
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#define SSP_MSG2SSP_INST_BYPASS_SENSOR_RM 0xa2
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#define SSP_MSG2SSP_INST_REMOVE_ALL 0xa3
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#define SSP_MSG2SSP_INST_CHANGE_DELAY 0xa4
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#define SSP_MSG2SSP_INST_LIBRARY_ADD 0xb1
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#define SSP_MSG2SSP_INST_LIBRARY_REMOVE 0xb2
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#define SSP_MSG2SSP_INST_LIB_NOTI 0xb4
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#define SSP_MSG2SSP_INST_LIB_DATA 0xc1
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#define SSP_MSG2SSP_AP_MCU_SET_GYRO_CAL 0xcd
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#define SSP_MSG2SSP_AP_MCU_SET_ACCEL_CAL 0xce
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#define SSP_MSG2SSP_AP_STATUS_SHUTDOWN 0xd0
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#define SSP_MSG2SSP_AP_STATUS_WAKEUP 0xd1
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#define SSP_MSG2SSP_AP_STATUS_SLEEP 0xd2
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#define SSP_MSG2SSP_AP_STATUS_RESUME 0xd3
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#define SSP_MSG2SSP_AP_STATUS_SUSPEND 0xd4
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#define SSP_MSG2SSP_AP_STATUS_RESET 0xd5
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#define SSP_MSG2SSP_AP_STATUS_POW_CONNECTED 0xd6
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#define SSP_MSG2SSP_AP_STATUS_POW_DISCONNECTED 0xd7
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#define SSP_MSG2SSP_AP_TEMPHUMIDITY_CAL_DONE 0xda
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#define SSP_MSG2SSP_AP_MCU_SET_DUMPMODE 0xdb
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#define SSP_MSG2SSP_AP_MCU_DUMP_CHECK 0xdc
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#define SSP_MSG2SSP_AP_MCU_BATCH_FLUSH 0xdd
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#define SSP_MSG2SSP_AP_MCU_BATCH_COUNT 0xdf
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#define SSP_MSG2SSP_AP_WHOAMI 0x0f
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#define SSP_MSG2SSP_AP_FIRMWARE_REV 0xf0
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#define SSP_MSG2SSP_AP_SENSOR_FORMATION 0xf1
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#define SSP_MSG2SSP_AP_SENSOR_PROXTHRESHOLD 0xf2
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#define SSP_MSG2SSP_AP_SENSOR_BARCODE_EMUL 0xf3
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#define SSP_MSG2SSP_AP_SENSOR_SCANNING 0xf4
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#define SSP_MSG2SSP_AP_SET_MAGNETIC_HWOFFSET 0xf5
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#define SSP_MSG2SSP_AP_GET_MAGNETIC_HWOFFSET 0xf6
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#define SSP_MSG2SSP_AP_SENSOR_GESTURE_CURRENT 0xf7
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#define SSP_MSG2SSP_AP_GET_THERM 0xf8
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#define SSP_MSG2SSP_AP_GET_BIG_DATA 0xf9
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#define SSP_MSG2SSP_AP_SET_BIG_DATA 0xfa
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#define SSP_MSG2SSP_AP_START_BIG_DATA 0xfb
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#define SSP_MSG2SSP_AP_SET_MAGNETIC_STATIC_MATRIX 0xfd
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#define SSP_MSG2SSP_AP_SENSOR_TILT 0xea
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#define SSP_MSG2SSP_AP_MCU_SET_TIME 0xfe
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#define SSP_MSG2SSP_AP_MCU_GET_TIME 0xff
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#define SSP_MSG2SSP_AP_FUSEROM 0x01
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/* voice data */
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#define SSP_TYPE_WAKE_UP_VOICE_SERVICE 0x01
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#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_AM 0x01
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#define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_GRAMMER 0x02
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/* Factory Test */
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#define SSP_ACCELEROMETER_FACTORY 0x80
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#define SSP_GYROSCOPE_FACTORY 0x81
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#define SSP_GEOMAGNETIC_FACTORY 0x82
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#define SSP_PRESSURE_FACTORY 0x85
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#define SSP_GESTURE_FACTORY 0x86
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#define SSP_TEMPHUMIDITY_CRC_FACTORY 0x88
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#define SSP_GYROSCOPE_TEMP_FACTORY 0x8a
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#define SSP_GYROSCOPE_DPS_FACTORY 0x8b
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#define SSP_MCU_FACTORY 0x8c
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#define SSP_MCU_SLEEP_FACTORY 0x8d
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/* SSP -> AP ACK about write CMD */
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#define SSP_MSG_ACK 0x80 /* ACK from SSP to AP */
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#define SSP_MSG_NAK 0x70 /* NAK from SSP to AP */
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struct ssp_sensorhub_info {
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char *fw_name;
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char *fw_crashed_name;
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unsigned int fw_rev;
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const u8 * const mag_table;
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const unsigned int mag_length;
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};
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/* ssp_msg options bit */
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#define SSP_RW 0
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#define SSP_INDEX 3
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#define SSP_AP2HUB_READ 0
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#define SSP_AP2HUB_WRITE 1
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#define SSP_HUB2AP_WRITE 2
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#define SSP_AP2HUB_READY 3
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#define SSP_AP2HUB_RETURN 4
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/**
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* struct ssp_data - ssp platformdata structure
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* @spi: spi device
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* @sensorhub_info: info about sensorhub board specific features
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* @wdt_timer: watchdog timer
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* @work_wdt: watchdog work
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* @work_firmware: firmware upgrade work queue
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* @work_refresh: refresh work queue for reset request from MCU
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* @shut_down: shut down flag
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* @mcu_dump_mode: mcu dump mode for debug
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* @time_syncing: time syncing indication flag
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* @timestamp: previous time in ns calculated for time syncing
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* @check_status: status table for each sensor
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* @com_fail_cnt: communication fail count
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* @reset_cnt: reset count
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* @timeout_cnt: timeout count
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* @available_sensors: available sensors seen by sensorhub (bit array)
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* @cur_firm_rev: cached current firmware revision
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* @last_resume_state: last AP resume/suspend state used to handle the PM
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* state of ssp
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* @last_ap_state: (obsolete) sleep notification for MCU
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* @sensor_enable: sensor enable mask
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* @delay_buf: data acquisition intervals table
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* @batch_latency_buf: yet unknown but existing in communication protocol
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* @batch_opt_buf: yet unknown but existing in communication protocol
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* @accel_position: yet unknown but existing in communication protocol
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* @mag_position: yet unknown but existing in communication protocol
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* @fw_dl_state: firmware download state
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* @comm_lock: lock protecting the handshake
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* @pending_lock: lock protecting pending list and completion
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* @mcu_reset_gpio: mcu reset line
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* @ap_mcu_gpio: ap to mcu gpio line
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* @mcu_ap_gpio: mcu to ap gpio line
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* @pending_list: pending list for messages queued to be sent/read
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* @sensor_devs: registered IIO devices table
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* @enable_refcount: enable reference count for wdt (watchdog timer)
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* @header_buffer: cache aligned buffer for packet header
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*/
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struct ssp_data {
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struct spi_device *spi;
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struct ssp_sensorhub_info *sensorhub_info;
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struct timer_list wdt_timer;
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struct work_struct work_wdt;
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struct delayed_work work_refresh;
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bool shut_down;
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bool mcu_dump_mode;
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bool time_syncing;
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int64_t timestamp;
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int check_status[SSP_SENSOR_MAX];
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unsigned int com_fail_cnt;
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unsigned int reset_cnt;
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unsigned int timeout_cnt;
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unsigned int available_sensors;
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unsigned int cur_firm_rev;
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char last_resume_state;
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char last_ap_state;
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unsigned int sensor_enable;
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u32 delay_buf[SSP_SENSOR_MAX];
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s32 batch_latency_buf[SSP_SENSOR_MAX];
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s8 batch_opt_buf[SSP_SENSOR_MAX];
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int accel_position;
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int mag_position;
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int fw_dl_state;
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struct mutex comm_lock;
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struct mutex pending_lock;
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int mcu_reset_gpio;
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int ap_mcu_gpio;
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int mcu_ap_gpio;
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struct list_head pending_list;
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struct iio_dev *sensor_devs[SSP_SENSOR_MAX];
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atomic_t enable_refcount;
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__le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)]
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____cacheline_aligned;
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};
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void ssp_clean_pending_list(struct ssp_data *data);
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int ssp_command(struct ssp_data *data, char command, int arg);
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int ssp_send_instruction(struct ssp_data *data, u8 inst, u8 sensor_type,
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u8 *send_buf, u8 length);
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int ssp_irq_msg(struct ssp_data *data);
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int ssp_get_chipid(struct ssp_data *data);
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int ssp_set_magnetic_matrix(struct ssp_data *data);
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unsigned int ssp_get_sensor_scanning_info(struct ssp_data *data);
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unsigned int ssp_get_firmware_rev(struct ssp_data *data);
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int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay);
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#endif /* __SSP_SENSORHUB_H__ */
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