root/drivers/iio/common/ssp_sensors/ssp.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
   4  */
   5 
   6 #ifndef __SSP_SENSORHUB_H__
   7 #define __SSP_SENSORHUB_H__
   8 
   9 #include <linux/delay.h>
  10 #include <linux/gpio.h>
  11 #include <linux/iio/common/ssp_sensors.h>
  12 #include <linux/iio/iio.h>
  13 #include <linux/spi/spi.h>
  14 
  15 #define SSP_DEVICE_ID           0x55
  16 
  17 #ifdef SSP_DBG
  18 #define ssp_dbg(format, ...) pr_info("[SSP] "format, ##__VA_ARGS__)
  19 #else
  20 #define ssp_dbg(format, ...)
  21 #endif
  22 
  23 #define SSP_SW_RESET_TIME               3000
  24 /* Sensor polling in ms */
  25 #define SSP_DEFAULT_POLLING_DELAY       200
  26 #define SSP_DEFAULT_RETRIES             3
  27 #define SSP_DATA_PACKET_SIZE            960
  28 #define SSP_HEADER_BUFFER_SIZE          4
  29 
  30 enum {
  31         SSP_KERNEL_BINARY = 0,
  32         SSP_KERNEL_CRASHED_BINARY,
  33 };
  34 
  35 enum {
  36         SSP_INITIALIZATION_STATE = 0,
  37         SSP_NO_SENSOR_STATE,
  38         SSP_ADD_SENSOR_STATE,
  39         SSP_RUNNING_SENSOR_STATE,
  40 };
  41 
  42 /* Firmware download STATE */
  43 enum {
  44         SSP_FW_DL_STATE_FAIL = -1,
  45         SSP_FW_DL_STATE_NONE = 0,
  46         SSP_FW_DL_STATE_NEED_TO_SCHEDULE,
  47         SSP_FW_DL_STATE_SCHEDULED,
  48         SSP_FW_DL_STATE_DOWNLOADING,
  49         SSP_FW_DL_STATE_SYNC,
  50         SSP_FW_DL_STATE_DONE,
  51 };
  52 
  53 #define SSP_INVALID_REVISION                    99999
  54 #define SSP_INVALID_REVISION2                   0xffffff
  55 
  56 /* AP -> SSP Instruction */
  57 #define SSP_MSG2SSP_INST_BYPASS_SENSOR_ADD      0xa1
  58 #define SSP_MSG2SSP_INST_BYPASS_SENSOR_RM       0xa2
  59 #define SSP_MSG2SSP_INST_REMOVE_ALL             0xa3
  60 #define SSP_MSG2SSP_INST_CHANGE_DELAY           0xa4
  61 #define SSP_MSG2SSP_INST_LIBRARY_ADD            0xb1
  62 #define SSP_MSG2SSP_INST_LIBRARY_REMOVE         0xb2
  63 #define SSP_MSG2SSP_INST_LIB_NOTI               0xb4
  64 #define SSP_MSG2SSP_INST_LIB_DATA               0xc1
  65 
  66 #define SSP_MSG2SSP_AP_MCU_SET_GYRO_CAL         0xcd
  67 #define SSP_MSG2SSP_AP_MCU_SET_ACCEL_CAL        0xce
  68 #define SSP_MSG2SSP_AP_STATUS_SHUTDOWN          0xd0
  69 #define SSP_MSG2SSP_AP_STATUS_WAKEUP            0xd1
  70 #define SSP_MSG2SSP_AP_STATUS_SLEEP             0xd2
  71 #define SSP_MSG2SSP_AP_STATUS_RESUME            0xd3
  72 #define SSP_MSG2SSP_AP_STATUS_SUSPEND           0xd4
  73 #define SSP_MSG2SSP_AP_STATUS_RESET             0xd5
  74 #define SSP_MSG2SSP_AP_STATUS_POW_CONNECTED     0xd6
  75 #define SSP_MSG2SSP_AP_STATUS_POW_DISCONNECTED  0xd7
  76 #define SSP_MSG2SSP_AP_TEMPHUMIDITY_CAL_DONE    0xda
  77 #define SSP_MSG2SSP_AP_MCU_SET_DUMPMODE         0xdb
  78 #define SSP_MSG2SSP_AP_MCU_DUMP_CHECK           0xdc
  79 #define SSP_MSG2SSP_AP_MCU_BATCH_FLUSH          0xdd
  80 #define SSP_MSG2SSP_AP_MCU_BATCH_COUNT          0xdf
  81 
  82 #define SSP_MSG2SSP_AP_WHOAMI                           0x0f
  83 #define SSP_MSG2SSP_AP_FIRMWARE_REV                     0xf0
  84 #define SSP_MSG2SSP_AP_SENSOR_FORMATION                 0xf1
  85 #define SSP_MSG2SSP_AP_SENSOR_PROXTHRESHOLD             0xf2
  86 #define SSP_MSG2SSP_AP_SENSOR_BARCODE_EMUL              0xf3
  87 #define SSP_MSG2SSP_AP_SENSOR_SCANNING                  0xf4
  88 #define SSP_MSG2SSP_AP_SET_MAGNETIC_HWOFFSET            0xf5
  89 #define SSP_MSG2SSP_AP_GET_MAGNETIC_HWOFFSET            0xf6
  90 #define SSP_MSG2SSP_AP_SENSOR_GESTURE_CURRENT           0xf7
  91 #define SSP_MSG2SSP_AP_GET_THERM                        0xf8
  92 #define SSP_MSG2SSP_AP_GET_BIG_DATA                     0xf9
  93 #define SSP_MSG2SSP_AP_SET_BIG_DATA                     0xfa
  94 #define SSP_MSG2SSP_AP_START_BIG_DATA                   0xfb
  95 #define SSP_MSG2SSP_AP_SET_MAGNETIC_STATIC_MATRIX       0xfd
  96 #define SSP_MSG2SSP_AP_SENSOR_TILT                      0xea
  97 #define SSP_MSG2SSP_AP_MCU_SET_TIME                     0xfe
  98 #define SSP_MSG2SSP_AP_MCU_GET_TIME                     0xff
  99 
 100 #define SSP_MSG2SSP_AP_FUSEROM                          0x01
 101 
 102 /* voice data */
 103 #define SSP_TYPE_WAKE_UP_VOICE_SERVICE                  0x01
 104 #define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_AM          0x01
 105 #define SSP_TYPE_WAKE_UP_VOICE_SOUND_SOURCE_GRAMMER     0x02
 106 
 107 /* Factory Test */
 108 #define SSP_ACCELEROMETER_FACTORY                       0x80
 109 #define SSP_GYROSCOPE_FACTORY                           0x81
 110 #define SSP_GEOMAGNETIC_FACTORY                         0x82
 111 #define SSP_PRESSURE_FACTORY                            0x85
 112 #define SSP_GESTURE_FACTORY                             0x86
 113 #define SSP_TEMPHUMIDITY_CRC_FACTORY                    0x88
 114 #define SSP_GYROSCOPE_TEMP_FACTORY                      0x8a
 115 #define SSP_GYROSCOPE_DPS_FACTORY                       0x8b
 116 #define SSP_MCU_FACTORY                                 0x8c
 117 #define SSP_MCU_SLEEP_FACTORY                           0x8d
 118 
 119 /* SSP -> AP ACK about write CMD */
 120 #define SSP_MSG_ACK             0x80    /* ACK from SSP to AP */
 121 #define SSP_MSG_NAK             0x70    /* NAK from SSP to AP */
 122 
 123 struct ssp_sensorhub_info {
 124         char *fw_name;
 125         char *fw_crashed_name;
 126         unsigned int fw_rev;
 127         const u8 * const mag_table;
 128         const unsigned int mag_length;
 129 };
 130 
 131 /* ssp_msg options bit */
 132 #define SSP_RW          0
 133 #define SSP_INDEX       3
 134 
 135 #define SSP_AP2HUB_READ         0
 136 #define SSP_AP2HUB_WRITE        1
 137 #define SSP_HUB2AP_WRITE        2
 138 #define SSP_AP2HUB_READY        3
 139 #define SSP_AP2HUB_RETURN       4
 140 
 141 /**
 142  * struct ssp_data - ssp platformdata structure
 143  * @spi:                spi device
 144  * @sensorhub_info:     info about sensorhub board specific features
 145  * @wdt_timer:          watchdog timer
 146  * @work_wdt:           watchdog work
 147  * @work_firmware:      firmware upgrade work queue
 148  * @work_refresh:       refresh work queue for reset request from MCU
 149  * @shut_down:          shut down flag
 150  * @mcu_dump_mode:      mcu dump mode for debug
 151  * @time_syncing:       time syncing indication flag
 152  * @timestamp:          previous time in ns calculated for time syncing
 153  * @check_status:       status table for each sensor
 154  * @com_fail_cnt:       communication fail count
 155  * @reset_cnt:          reset count
 156  * @timeout_cnt:        timeout count
 157  * @available_sensors:  available sensors seen by sensorhub (bit array)
 158  * @cur_firm_rev:       cached current firmware revision
 159  * @last_resume_state:  last AP resume/suspend state used to handle the PM
 160  *                      state of ssp
 161  * @last_ap_state:      (obsolete) sleep notification for MCU
 162  * @sensor_enable:      sensor enable mask
 163  * @delay_buf:          data acquisition intervals table
 164  * @batch_latency_buf:  yet unknown but existing in communication protocol
 165  * @batch_opt_buf:      yet unknown but existing in communication protocol
 166  * @accel_position:     yet unknown but existing in communication protocol
 167  * @mag_position:       yet unknown but existing in communication protocol
 168  * @fw_dl_state:        firmware download state
 169  * @comm_lock:          lock protecting the handshake
 170  * @pending_lock:       lock protecting pending list and completion
 171  * @mcu_reset_gpio:     mcu reset line
 172  * @ap_mcu_gpio:        ap to mcu gpio line
 173  * @mcu_ap_gpio:        mcu to ap gpio line
 174  * @pending_list:       pending list for messages queued to be sent/read
 175  * @sensor_devs:        registered IIO devices table
 176  * @enable_refcount:    enable reference count for wdt (watchdog timer)
 177  * @header_buffer:      cache aligned buffer for packet header
 178  */
 179 struct ssp_data {
 180         struct spi_device *spi;
 181         const struct ssp_sensorhub_info *sensorhub_info;
 182         struct timer_list wdt_timer;
 183         struct work_struct work_wdt;
 184         struct delayed_work work_refresh;
 185 
 186         bool shut_down;
 187         bool mcu_dump_mode;
 188         bool time_syncing;
 189         int64_t timestamp;
 190 
 191         int check_status[SSP_SENSOR_MAX];
 192 
 193         unsigned int com_fail_cnt;
 194         unsigned int reset_cnt;
 195         unsigned int timeout_cnt;
 196 
 197         unsigned int available_sensors;
 198         unsigned int cur_firm_rev;
 199 
 200         char last_resume_state;
 201         char last_ap_state;
 202 
 203         unsigned int sensor_enable;
 204         u32 delay_buf[SSP_SENSOR_MAX];
 205         s32 batch_latency_buf[SSP_SENSOR_MAX];
 206         s8 batch_opt_buf[SSP_SENSOR_MAX];
 207 
 208         int accel_position;
 209         int mag_position;
 210         int fw_dl_state;
 211 
 212         struct mutex comm_lock;
 213         struct mutex pending_lock;
 214 
 215         int mcu_reset_gpio;
 216         int ap_mcu_gpio;
 217         int mcu_ap_gpio;
 218 
 219         struct list_head pending_list;
 220 
 221         struct iio_dev *sensor_devs[SSP_SENSOR_MAX];
 222         atomic_t enable_refcount;
 223 
 224         __le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)]
 225                 ____cacheline_aligned;
 226 };
 227 
 228 void ssp_clean_pending_list(struct ssp_data *data);
 229 
 230 int ssp_command(struct ssp_data *data, char command, int arg);
 231 
 232 int ssp_send_instruction(struct ssp_data *data, u8 inst, u8 sensor_type,
 233                          u8 *send_buf, u8 length);
 234 
 235 int ssp_irq_msg(struct ssp_data *data);
 236 
 237 int ssp_get_chipid(struct ssp_data *data);
 238 
 239 int ssp_set_magnetic_matrix(struct ssp_data *data);
 240 
 241 unsigned int ssp_get_sensor_scanning_info(struct ssp_data *data);
 242 
 243 unsigned int ssp_get_firmware_rev(struct ssp_data *data);
 244 
 245 int ssp_queue_ssp_refresh_task(struct ssp_data *data, unsigned int delay);
 246 
 247 #endif /* __SSP_SENSORHUB_H__ */