1 /* 2 * Cypress APA trackpad with I2C interface 3 * 4 * Author: Dudley Du <[email protected]> 5 * 6 * Copyright (C) 2014-2015 Cypress Semiconductor, Inc. 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive for 10 * more details. 11 */ 12 13 #ifndef _CYAPA_H 14 #define _CYAPA_H 15 16 #include <linux/firmware.h> 17 18 /* APA trackpad firmware generation number. */ 19 #define CYAPA_GEN_UNKNOWN 0x00 /* unknown protocol. */ 20 #define CYAPA_GEN3 0x03 /* support MT-protocol B with tracking ID. */ 21 #define CYAPA_GEN5 0x05 /* support TrueTouch GEN5 trackpad device. */ 22 #define CYAPA_GEN6 0x06 /* support TrueTouch GEN6 trackpad device. */ 23 24 #define CYAPA_NAME "Cypress APA Trackpad (cyapa)" 25 26 /* 27 * Macros for SMBus communication 28 */ 29 #define SMBUS_READ 0x01 30 #define SMBUS_WRITE 0x00 31 #define SMBUS_ENCODE_IDX(cmd, idx) ((cmd) | (((idx) & 0x03) << 1)) 32 #define SMBUS_ENCODE_RW(cmd, rw) ((cmd) | ((rw) & 0x01)) 33 #define SMBUS_BYTE_BLOCK_CMD_MASK 0x80 34 #define SMBUS_GROUP_BLOCK_CMD_MASK 0x40 35 36 /* Commands for read/write registers of Cypress trackpad */ 37 #define CYAPA_CMD_SOFT_RESET 0x00 38 #define CYAPA_CMD_POWER_MODE 0x01 39 #define CYAPA_CMD_DEV_STATUS 0x02 40 #define CYAPA_CMD_GROUP_DATA 0x03 41 #define CYAPA_CMD_GROUP_CMD 0x04 42 #define CYAPA_CMD_GROUP_QUERY 0x05 43 #define CYAPA_CMD_BL_STATUS 0x06 44 #define CYAPA_CMD_BL_HEAD 0x07 45 #define CYAPA_CMD_BL_CMD 0x08 46 #define CYAPA_CMD_BL_DATA 0x09 47 #define CYAPA_CMD_BL_ALL 0x0a 48 #define CYAPA_CMD_BLK_PRODUCT_ID 0x0b 49 #define CYAPA_CMD_BLK_HEAD 0x0c 50 #define CYAPA_CMD_MAX_BASELINE 0x0d 51 #define CYAPA_CMD_MIN_BASELINE 0x0e 52 53 #define BL_HEAD_OFFSET 0x00 54 #define BL_DATA_OFFSET 0x10 55 56 #define BL_STATUS_SIZE 3 /* Length of gen3 bootloader status registers */ 57 #define CYAPA_REG_MAP_SIZE 256 58 59 /* 60 * Gen3 Operational Device Status Register 61 * 62 * bit 7: Valid interrupt source 63 * bit 6 - 4: Reserved 64 * bit 3 - 2: Power status 65 * bit 1 - 0: Device status 66 */ 67 #define REG_OP_STATUS 0x00 68 #define OP_STATUS_SRC 0x80 69 #define OP_STATUS_POWER 0x0c 70 #define OP_STATUS_DEV 0x03 71 #define OP_STATUS_MASK (OP_STATUS_SRC | OP_STATUS_POWER | OP_STATUS_DEV) 72 73 /* 74 * Operational Finger Count/Button Flags Register 75 * 76 * bit 7 - 4: Number of touched finger 77 * bit 3: Valid data 78 * bit 2: Middle Physical Button 79 * bit 1: Right Physical Button 80 * bit 0: Left physical Button 81 */ 82 #define REG_OP_DATA1 0x01 83 #define OP_DATA_VALID 0x08 84 #define OP_DATA_MIDDLE_BTN 0x04 85 #define OP_DATA_RIGHT_BTN 0x02 86 #define OP_DATA_LEFT_BTN 0x01 87 #define OP_DATA_BTN_MASK (OP_DATA_MIDDLE_BTN | OP_DATA_RIGHT_BTN | \ 88 OP_DATA_LEFT_BTN) 89 90 /* 91 * Write-only command file register used to issue commands and 92 * parameters to the bootloader. 93 * The default value read from it is always 0x00. 94 */ 95 #define REG_BL_FILE 0x00 96 #define BL_FILE 0x00 97 98 /* 99 * Bootloader Status Register 100 * 101 * bit 7: Busy 102 * bit 6 - 5: Reserved 103 * bit 4: Bootloader running 104 * bit 3 - 2: Reserved 105 * bit 1: Watchdog Reset 106 * bit 0: Checksum valid 107 */ 108 #define REG_BL_STATUS 0x01 109 #define BL_STATUS_REV_6_5 0x60 110 #define BL_STATUS_BUSY 0x80 111 #define BL_STATUS_RUNNING 0x10 112 #define BL_STATUS_REV_3_2 0x0c 113 #define BL_STATUS_WATCHDOG 0x02 114 #define BL_STATUS_CSUM_VALID 0x01 115 #define BL_STATUS_REV_MASK (BL_STATUS_WATCHDOG | BL_STATUS_REV_3_2 | \ 116 BL_STATUS_REV_6_5) 117 118 /* 119 * Bootloader Error Register 120 * 121 * bit 7: Invalid 122 * bit 6: Invalid security key 123 * bit 5: Bootloading 124 * bit 4: Command checksum 125 * bit 3: Flash protection error 126 * bit 2: Flash checksum error 127 * bit 1 - 0: Reserved 128 */ 129 #define REG_BL_ERROR 0x02 130 #define BL_ERROR_INVALID 0x80 131 #define BL_ERROR_INVALID_KEY 0x40 132 #define BL_ERROR_BOOTLOADING 0x20 133 #define BL_ERROR_CMD_CSUM 0x10 134 #define BL_ERROR_FLASH_PROT 0x08 135 #define BL_ERROR_FLASH_CSUM 0x04 136 #define BL_ERROR_RESERVED 0x03 137 #define BL_ERROR_NO_ERR_IDLE 0x00 138 #define BL_ERROR_NO_ERR_ACTIVE (BL_ERROR_BOOTLOADING) 139 140 #define CAPABILITY_BTN_SHIFT 3 141 #define CAPABILITY_LEFT_BTN_MASK (0x01 << 3) 142 #define CAPABILITY_RIGHT_BTN_MASK (0x01 << 4) 143 #define CAPABILITY_MIDDLE_BTN_MASK (0x01 << 5) 144 #define CAPABILITY_BTN_MASK (CAPABILITY_LEFT_BTN_MASK | \ 145 CAPABILITY_RIGHT_BTN_MASK | \ 146 CAPABILITY_MIDDLE_BTN_MASK) 147 148 #define PWR_MODE_MASK 0xfc 149 #define PWR_MODE_FULL_ACTIVE (0x3f << 2) 150 #define PWR_MODE_IDLE (0x03 << 2) /* Default rt suspend scanrate: 30ms */ 151 #define PWR_MODE_SLEEP (0x05 << 2) /* Default suspend scanrate: 50ms */ 152 #define PWR_MODE_BTN_ONLY (0x01 << 2) 153 #define PWR_MODE_OFF (0x00 << 2) 154 155 #define PWR_STATUS_MASK 0x0c 156 #define PWR_STATUS_ACTIVE (0x03 << 2) 157 #define PWR_STATUS_IDLE (0x02 << 2) 158 #define PWR_STATUS_BTN_ONLY (0x01 << 2) 159 #define PWR_STATUS_OFF (0x00 << 2) 160 161 #define AUTOSUSPEND_DELAY 2000 /* unit : ms */ 162 163 #define BTN_ONLY_MODE_NAME "buttononly" 164 #define OFF_MODE_NAME "off" 165 166 /* Common macros for PIP interface. */ 167 #define PIP_HID_DESCRIPTOR_ADDR 0x0001 168 #define PIP_REPORT_DESCRIPTOR_ADDR 0x0002 169 #define PIP_INPUT_REPORT_ADDR 0x0003 170 #define PIP_OUTPUT_REPORT_ADDR 0x0004 171 #define PIP_CMD_DATA_ADDR 0x0006 172 173 #define PIP_RETRIEVE_DATA_STRUCTURE 0x24 174 #define PIP_CMD_CALIBRATE 0x28 175 #define PIP_BL_CMD_VERIFY_APP_INTEGRITY 0x31 176 #define PIP_BL_CMD_GET_BL_INFO 0x38 177 #define PIP_BL_CMD_PROGRAM_VERIFY_ROW 0x39 178 #define PIP_BL_CMD_LAUNCH_APP 0x3b 179 #define PIP_BL_CMD_INITIATE_BL 0x48 180 #define PIP_INVALID_CMD 0xff 181 182 #define PIP_HID_DESCRIPTOR_SIZE 32 183 #define PIP_HID_APP_REPORT_ID 0xf7 184 #define PIP_HID_BL_REPORT_ID 0xff 185 186 #define PIP_BL_CMD_REPORT_ID 0x40 187 #define PIP_BL_RESP_REPORT_ID 0x30 188 #define PIP_APP_CMD_REPORT_ID 0x2f 189 #define PIP_APP_RESP_REPORT_ID 0x1f 190 191 #define PIP_READ_SYS_INFO_CMD_LENGTH 7 192 #define PIP_BL_READ_APP_INFO_CMD_LENGTH 13 193 #define PIP_MIN_BL_CMD_LENGTH 13 194 #define PIP_MIN_BL_RESP_LENGTH 11 195 #define PIP_MIN_APP_CMD_LENGTH 7 196 #define PIP_MIN_APP_RESP_LENGTH 5 197 #define PIP_UNSUPPORTED_CMD_RESP_LENGTH 6 198 #define PIP_READ_SYS_INFO_RESP_LENGTH 71 199 #define PIP_BL_APP_INFO_RESP_LENGTH 30 200 #define PIP_BL_GET_INFO_RESP_LENGTH 19 201 202 #define PIP_BL_PLATFORM_VER_SHIFT 4 203 #define PIP_BL_PLATFORM_VER_MASK 0x0f 204 205 #define PIP_PRODUCT_FAMILY_MASK 0xf000 206 #define PIP_PRODUCT_FAMILY_TRACKPAD 0x1000 207 208 #define PIP_DEEP_SLEEP_STATE_ON 0x00 209 #define PIP_DEEP_SLEEP_STATE_OFF 0x01 210 #define PIP_DEEP_SLEEP_STATE_MASK 0x03 211 #define PIP_APP_DEEP_SLEEP_REPORT_ID 0xf0 212 #define PIP_DEEP_SLEEP_RESP_LENGTH 5 213 #define PIP_DEEP_SLEEP_OPCODE 0x08 214 #define PIP_DEEP_SLEEP_OPCODE_MASK 0x0f 215 216 #define PIP_RESP_LENGTH_OFFSET 0 217 #define PIP_RESP_LENGTH_SIZE 2 218 #define PIP_RESP_REPORT_ID_OFFSET 2 219 #define PIP_RESP_RSVD_OFFSET 3 220 #define PIP_RESP_RSVD_KEY 0x00 221 #define PIP_RESP_BL_SOP_OFFSET 4 222 #define PIP_SOP_KEY 0x01 /* Start of Packet */ 223 #define PIP_EOP_KEY 0x17 /* End of Packet */ 224 #define PIP_RESP_APP_CMD_OFFSET 4 225 #define GET_PIP_CMD_CODE(reg) ((reg) & 0x7f) 226 #define PIP_RESP_STATUS_OFFSET 5 227 228 #define VALID_CMD_RESP_HEADER(resp, cmd) \ 229 (((resp)[PIP_RESP_REPORT_ID_OFFSET] == PIP_APP_RESP_REPORT_ID) && \ 230 ((resp)[PIP_RESP_RSVD_OFFSET] == PIP_RESP_RSVD_KEY) && \ 231 (GET_PIP_CMD_CODE((resp)[PIP_RESP_APP_CMD_OFFSET]) == (cmd))) 232 233 #define PIP_CMD_COMPLETE_SUCCESS(resp_data) \ 234 ((resp_data)[PIP_RESP_STATUS_OFFSET] == 0x00) 235 236 /* Variables to record latest gen5 trackpad power states. */ 237 #define UNINIT_SLEEP_TIME 0xffff 238 #define UNINIT_PWR_MODE 0xff 239 #define PIP_DEV_SET_PWR_STATE(cyapa, s) ((cyapa)->dev_pwr_mode = (s)) 240 #define PIP_DEV_GET_PWR_STATE(cyapa) ((cyapa)->dev_pwr_mode) 241 #define PIP_DEV_SET_SLEEP_TIME(cyapa, t) ((cyapa)->dev_sleep_time = (t)) 242 #define PIP_DEV_GET_SLEEP_TIME(cyapa) ((cyapa)->dev_sleep_time) 243 #define PIP_DEV_UNINIT_SLEEP_TIME(cyapa) \ 244 (((cyapa)->dev_sleep_time) == UNINIT_SLEEP_TIME) 245 246 /* The touch.id is used as the MT slot id, thus max MT slot is 15 */ 247 #define CYAPA_MAX_MT_SLOTS 15 248 249 struct cyapa; 250 251 typedef bool (*cb_sort)(struct cyapa *, u8 *, int); 252 253 enum cyapa_pm_stage { 254 CYAPA_PM_DEACTIVE, 255 CYAPA_PM_ACTIVE, 256 CYAPA_PM_SUSPEND, 257 CYAPA_PM_RESUME, 258 CYAPA_PM_RUNTIME_SUSPEND, 259 CYAPA_PM_RUNTIME_RESUME, 260 }; 261 262 struct cyapa_dev_ops { 263 int (*check_fw)(struct cyapa *, const struct firmware *); 264 int (*bl_enter)(struct cyapa *); 265 int (*bl_activate)(struct cyapa *); 266 int (*bl_initiate)(struct cyapa *, const struct firmware *); 267 int (*update_fw)(struct cyapa *, const struct firmware *); 268 int (*bl_deactivate)(struct cyapa *); 269 270 ssize_t (*show_baseline)(struct device *, 271 struct device_attribute *, char *); 272 ssize_t (*calibrate_store)(struct device *, 273 struct device_attribute *, const char *, size_t); 274 275 int (*initialize)(struct cyapa *cyapa); 276 277 int (*state_parse)(struct cyapa *cyapa, u8 *reg_status, int len); 278 int (*operational_check)(struct cyapa *cyapa); 279 280 int (*irq_handler)(struct cyapa *); 281 bool (*irq_cmd_handler)(struct cyapa *); 282 int (*sort_empty_output_data)(struct cyapa *, 283 u8 *, int *, cb_sort); 284 285 int (*set_power_mode)(struct cyapa *, u8, u16, enum cyapa_pm_stage); 286 287 int (*set_proximity)(struct cyapa *, bool); 288 }; 289 290 struct cyapa_pip_cmd_states { 291 struct mutex cmd_lock; 292 struct completion cmd_ready; 293 atomic_t cmd_issued; 294 u8 in_progress_cmd; 295 bool is_irq_mode; 296 297 cb_sort resp_sort_func; 298 u8 *resp_data; 299 int *resp_len; 300 301 enum cyapa_pm_stage pm_stage; 302 struct mutex pm_stage_lock; 303 304 u8 irq_cmd_buf[CYAPA_REG_MAP_SIZE]; 305 u8 empty_buf[CYAPA_REG_MAP_SIZE]; 306 }; 307 308 union cyapa_cmd_states { 309 struct cyapa_pip_cmd_states pip; 310 }; 311 312 enum cyapa_state { 313 CYAPA_STATE_NO_DEVICE, 314 CYAPA_STATE_BL_BUSY, 315 CYAPA_STATE_BL_IDLE, 316 CYAPA_STATE_BL_ACTIVE, 317 CYAPA_STATE_OP, 318 CYAPA_STATE_GEN5_BL, 319 CYAPA_STATE_GEN5_APP, 320 CYAPA_STATE_GEN6_BL, 321 CYAPA_STATE_GEN6_APP, 322 }; 323 324 struct gen6_interval_setting { 325 u16 active_interval; 326 u16 lp1_interval; 327 u16 lp2_interval; 328 }; 329 330 /* The main device structure */ 331 struct cyapa { 332 enum cyapa_state state; 333 u8 status[BL_STATUS_SIZE]; 334 bool operational; /* true: ready for data reporting; false: not. */ 335 336 struct regulator *vcc; 337 struct i2c_client *client; 338 struct input_dev *input; 339 char phys[32]; /* Device physical location */ 340 bool irq_wake; /* Irq wake is enabled */ 341 bool smbus; 342 343 /* power mode settings */ 344 u8 suspend_power_mode; 345 u16 suspend_sleep_time; 346 u8 runtime_suspend_power_mode; 347 u16 runtime_suspend_sleep_time; 348 u8 dev_pwr_mode; 349 u16 dev_sleep_time; 350 struct gen6_interval_setting gen6_interval_setting; 351 352 /* Read from query data region. */ 353 char product_id[16]; 354 u8 platform_ver; /* Platform version. */ 355 u8 fw_maj_ver; /* Firmware major version. */ 356 u8 fw_min_ver; /* Firmware minor version. */ 357 u8 btn_capability; 358 u8 gen; 359 int max_abs_x; 360 int max_abs_y; 361 int physical_size_x; 362 int physical_size_y; 363 364 /* Used in ttsp and truetouch based trackpad devices. */ 365 u8 x_origin; /* X Axis Origin: 0 = left side; 1 = right side. */ 366 u8 y_origin; /* Y Axis Origin: 0 = top; 1 = bottom. */ 367 int electrodes_x; /* Number of electrodes on the X Axis*/ 368 int electrodes_y; /* Number of electrodes on the Y Axis*/ 369 int electrodes_rx; /* Number of Rx electrodes */ 370 int aligned_electrodes_rx; /* 4 aligned */ 371 int max_z; 372 373 /* 374 * Used to synchronize the access or update the device state. 375 * And since update firmware and read firmware image process will take 376 * quite long time, maybe more than 10 seconds, so use mutex_lock 377 * to sync and wait other interface and detecting are done or ready. 378 */ 379 struct mutex state_sync_lock; 380 381 const struct cyapa_dev_ops *ops; 382 383 union cyapa_cmd_states cmd_states; 384 }; 385 386 387 ssize_t cyapa_i2c_reg_read_block(struct cyapa *cyapa, u8 reg, size_t len, 388 u8 *values); 389 ssize_t cyapa_smbus_read_block(struct cyapa *cyapa, u8 cmd, size_t len, 390 u8 *values); 391 392 ssize_t cyapa_read_block(struct cyapa *cyapa, u8 cmd_idx, u8 *values); 393 394 int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout); 395 396 u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time); 397 u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode); 398 399 ssize_t cyapa_i2c_pip_read(struct cyapa *cyapa, u8 *buf, size_t size); 400 ssize_t cyapa_i2c_pip_write(struct cyapa *cyapa, u8 *buf, size_t size); 401 int cyapa_empty_pip_output_data(struct cyapa *cyapa, 402 u8 *buf, int *len, cb_sort func); 403 int cyapa_i2c_pip_cmd_irq_sync(struct cyapa *cyapa, 404 u8 *cmd, int cmd_len, 405 u8 *resp_data, int *resp_len, 406 unsigned long timeout, 407 cb_sort func, 408 bool irq_mode); 409 int cyapa_pip_state_parse(struct cyapa *cyapa, u8 *reg_data, int len); 410 bool cyapa_pip_sort_system_info_data(struct cyapa *cyapa, u8 *buf, int len); 411 bool cyapa_sort_tsg_pip_bl_resp_data(struct cyapa *cyapa, u8 *data, int len); 412 int cyapa_pip_deep_sleep(struct cyapa *cyapa, u8 state); 413 bool cyapa_sort_tsg_pip_app_resp_data(struct cyapa *cyapa, u8 *data, int len); 414 int cyapa_pip_bl_exit(struct cyapa *cyapa); 415 int cyapa_pip_bl_enter(struct cyapa *cyapa); 416 417 418 bool cyapa_is_pip_bl_mode(struct cyapa *cyapa); 419 bool cyapa_is_pip_app_mode(struct cyapa *cyapa); 420 int cyapa_pip_cmd_state_initialize(struct cyapa *cyapa); 421 422 int cyapa_pip_resume_scanning(struct cyapa *cyapa); 423 int cyapa_pip_suspend_scanning(struct cyapa *cyapa); 424 425 int cyapa_pip_check_fw(struct cyapa *cyapa, const struct firmware *fw); 426 int cyapa_pip_bl_initiate(struct cyapa *cyapa, const struct firmware *fw); 427 int cyapa_pip_do_fw_update(struct cyapa *cyapa, const struct firmware *fw); 428 int cyapa_pip_bl_activate(struct cyapa *cyapa); 429 int cyapa_pip_bl_deactivate(struct cyapa *cyapa); 430 ssize_t cyapa_pip_do_calibrate(struct device *dev, 431 struct device_attribute *attr, 432 const char *buf, size_t count); 433 int cyapa_pip_set_proximity(struct cyapa *cyapa, bool enable); 434 435 bool cyapa_pip_irq_cmd_handler(struct cyapa *cyapa); 436 int cyapa_pip_irq_handler(struct cyapa *cyapa); 437 438 439 extern u8 pip_read_sys_info[]; 440 extern u8 pip_bl_read_app_info[]; 441 extern const char product_id[]; 442 extern const struct cyapa_dev_ops cyapa_gen3_ops; 443 extern const struct cyapa_dev_ops cyapa_gen5_ops; 444 extern const struct cyapa_dev_ops cyapa_gen6_ops; 445 446 #endif 447