Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 1 | /* |
| 2 | * ADXL345/346 Three-Axis Digital Accelerometers |
| 3 | * |
| 4 | * Enter bugs at http://blackfin.uclinux.org/ |
| 5 | * |
| 6 | * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. |
| 7 | * Licensed under the GPL-2 or later. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/input.h> |
| 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/workqueue.h> |
| 17 | #include <linux/input/adxl34x.h> |
| 18 | #include <linux/module.h> |
| 19 | |
| 20 | #include "adxl34x.h" |
| 21 | |
| 22 | /* ADXL345/6 Register Map */ |
| 23 | #define DEVID 0x00 /* R Device ID */ |
| 24 | #define THRESH_TAP 0x1D /* R/W Tap threshold */ |
| 25 | #define OFSX 0x1E /* R/W X-axis offset */ |
| 26 | #define OFSY 0x1F /* R/W Y-axis offset */ |
| 27 | #define OFSZ 0x20 /* R/W Z-axis offset */ |
| 28 | #define DUR 0x21 /* R/W Tap duration */ |
| 29 | #define LATENT 0x22 /* R/W Tap latency */ |
| 30 | #define WINDOW 0x23 /* R/W Tap window */ |
| 31 | #define THRESH_ACT 0x24 /* R/W Activity threshold */ |
| 32 | #define THRESH_INACT 0x25 /* R/W Inactivity threshold */ |
| 33 | #define TIME_INACT 0x26 /* R/W Inactivity time */ |
| 34 | #define ACT_INACT_CTL 0x27 /* R/W Axis enable control for activity and */ |
| 35 | /* inactivity detection */ |
| 36 | #define THRESH_FF 0x28 /* R/W Free-fall threshold */ |
| 37 | #define TIME_FF 0x29 /* R/W Free-fall time */ |
| 38 | #define TAP_AXES 0x2A /* R/W Axis control for tap/double tap */ |
| 39 | #define ACT_TAP_STATUS 0x2B /* R Source of tap/double tap */ |
| 40 | #define BW_RATE 0x2C /* R/W Data rate and power mode control */ |
| 41 | #define POWER_CTL 0x2D /* R/W Power saving features control */ |
| 42 | #define INT_ENABLE 0x2E /* R/W Interrupt enable control */ |
| 43 | #define INT_MAP 0x2F /* R/W Interrupt mapping control */ |
| 44 | #define INT_SOURCE 0x30 /* R Source of interrupts */ |
| 45 | #define DATA_FORMAT 0x31 /* R/W Data format control */ |
| 46 | #define DATAX0 0x32 /* R X-Axis Data 0 */ |
| 47 | #define DATAX1 0x33 /* R X-Axis Data 1 */ |
| 48 | #define DATAY0 0x34 /* R Y-Axis Data 0 */ |
| 49 | #define DATAY1 0x35 /* R Y-Axis Data 1 */ |
| 50 | #define DATAZ0 0x36 /* R Z-Axis Data 0 */ |
| 51 | #define DATAZ1 0x37 /* R Z-Axis Data 1 */ |
| 52 | #define FIFO_CTL 0x38 /* R/W FIFO control */ |
| 53 | #define FIFO_STATUS 0x39 /* R FIFO status */ |
| 54 | #define TAP_SIGN 0x3A /* R Sign and source for tap/double tap */ |
| 55 | /* Orientation ADXL346 only */ |
| 56 | #define ORIENT_CONF 0x3B /* R/W Orientation configuration */ |
| 57 | #define ORIENT 0x3C /* R Orientation status */ |
| 58 | |
| 59 | /* DEVIDs */ |
| 60 | #define ID_ADXL345 0xE5 |
| 61 | #define ID_ADXL346 0xE6 |
| 62 | |
| 63 | /* INT_ENABLE/INT_MAP/INT_SOURCE Bits */ |
| 64 | #define DATA_READY (1 << 7) |
| 65 | #define SINGLE_TAP (1 << 6) |
| 66 | #define DOUBLE_TAP (1 << 5) |
| 67 | #define ACTIVITY (1 << 4) |
| 68 | #define INACTIVITY (1 << 3) |
| 69 | #define FREE_FALL (1 << 2) |
| 70 | #define WATERMARK (1 << 1) |
| 71 | #define OVERRUN (1 << 0) |
| 72 | |
| 73 | /* ACT_INACT_CONTROL Bits */ |
| 74 | #define ACT_ACDC (1 << 7) |
| 75 | #define ACT_X_EN (1 << 6) |
| 76 | #define ACT_Y_EN (1 << 5) |
| 77 | #define ACT_Z_EN (1 << 4) |
| 78 | #define INACT_ACDC (1 << 3) |
| 79 | #define INACT_X_EN (1 << 2) |
| 80 | #define INACT_Y_EN (1 << 1) |
| 81 | #define INACT_Z_EN (1 << 0) |
| 82 | |
| 83 | /* TAP_AXES Bits */ |
| 84 | #define SUPPRESS (1 << 3) |
| 85 | #define TAP_X_EN (1 << 2) |
| 86 | #define TAP_Y_EN (1 << 1) |
| 87 | #define TAP_Z_EN (1 << 0) |
| 88 | |
| 89 | /* ACT_TAP_STATUS Bits */ |
| 90 | #define ACT_X_SRC (1 << 6) |
| 91 | #define ACT_Y_SRC (1 << 5) |
| 92 | #define ACT_Z_SRC (1 << 4) |
| 93 | #define ASLEEP (1 << 3) |
| 94 | #define TAP_X_SRC (1 << 2) |
| 95 | #define TAP_Y_SRC (1 << 1) |
| 96 | #define TAP_Z_SRC (1 << 0) |
| 97 | |
| 98 | /* BW_RATE Bits */ |
| 99 | #define LOW_POWER (1 << 4) |
| 100 | #define RATE(x) ((x) & 0xF) |
| 101 | |
| 102 | /* POWER_CTL Bits */ |
| 103 | #define PCTL_LINK (1 << 5) |
| 104 | #define PCTL_AUTO_SLEEP (1 << 4) |
| 105 | #define PCTL_MEASURE (1 << 3) |
| 106 | #define PCTL_SLEEP (1 << 2) |
| 107 | #define PCTL_WAKEUP(x) ((x) & 0x3) |
| 108 | |
| 109 | /* DATA_FORMAT Bits */ |
| 110 | #define SELF_TEST (1 << 7) |
| 111 | #define SPI (1 << 6) |
| 112 | #define INT_INVERT (1 << 5) |
| 113 | #define FULL_RES (1 << 3) |
| 114 | #define JUSTIFY (1 << 2) |
| 115 | #define RANGE(x) ((x) & 0x3) |
| 116 | #define RANGE_PM_2g 0 |
| 117 | #define RANGE_PM_4g 1 |
| 118 | #define RANGE_PM_8g 2 |
| 119 | #define RANGE_PM_16g 3 |
| 120 | |
| 121 | /* |
| 122 | * Maximum value our axis may get in full res mode for the input device |
| 123 | * (signed 13 bits) |
| 124 | */ |
| 125 | #define ADXL_FULLRES_MAX_VAL 4096 |
| 126 | |
| 127 | /* |
| 128 | * Maximum value our axis may get in fixed res mode for the input device |
| 129 | * (signed 10 bits) |
| 130 | */ |
| 131 | #define ADXL_FIXEDRES_MAX_VAL 512 |
| 132 | |
| 133 | /* FIFO_CTL Bits */ |
| 134 | #define FIFO_MODE(x) (((x) & 0x3) << 6) |
| 135 | #define FIFO_BYPASS 0 |
| 136 | #define FIFO_FIFO 1 |
| 137 | #define FIFO_STREAM 2 |
| 138 | #define FIFO_TRIGGER 3 |
| 139 | #define TRIGGER (1 << 5) |
| 140 | #define SAMPLES(x) ((x) & 0x1F) |
| 141 | |
| 142 | /* FIFO_STATUS Bits */ |
| 143 | #define FIFO_TRIG (1 << 7) |
| 144 | #define ENTRIES(x) ((x) & 0x3F) |
| 145 | |
| 146 | /* TAP_SIGN Bits ADXL346 only */ |
| 147 | #define XSIGN (1 << 6) |
| 148 | #define YSIGN (1 << 5) |
| 149 | #define ZSIGN (1 << 4) |
| 150 | #define XTAP (1 << 3) |
| 151 | #define YTAP (1 << 2) |
| 152 | #define ZTAP (1 << 1) |
| 153 | |
| 154 | /* ORIENT_CONF ADXL346 only */ |
| 155 | #define ORIENT_DEADZONE(x) (((x) & 0x7) << 4) |
| 156 | #define ORIENT_DIVISOR(x) ((x) & 0x7) |
| 157 | |
| 158 | /* ORIENT ADXL346 only */ |
| 159 | #define ADXL346_2D_VALID (1 << 6) |
| 160 | #define ADXL346_2D_ORIENT(x) (((x) & 0x30) >> 4) |
| 161 | #define ADXL346_3D_VALID (1 << 3) |
| 162 | #define ADXL346_3D_ORIENT(x) ((x) & 0x7) |
| 163 | #define ADXL346_2D_PORTRAIT_POS 0 /* +X */ |
| 164 | #define ADXL346_2D_PORTRAIT_NEG 1 /* -X */ |
| 165 | #define ADXL346_2D_LANDSCAPE_POS 2 /* +Y */ |
| 166 | #define ADXL346_2D_LANDSCAPE_NEG 3 /* -Y */ |
| 167 | |
| 168 | #define ADXL346_3D_FRONT 3 /* +X */ |
| 169 | #define ADXL346_3D_BACK 4 /* -X */ |
| 170 | #define ADXL346_3D_RIGHT 2 /* +Y */ |
| 171 | #define ADXL346_3D_LEFT 5 /* -Y */ |
| 172 | #define ADXL346_3D_TOP 1 /* +Z */ |
| 173 | #define ADXL346_3D_BOTTOM 6 /* -Z */ |
| 174 | |
| 175 | #undef ADXL_DEBUG |
| 176 | |
| 177 | #define ADXL_X_AXIS 0 |
| 178 | #define ADXL_Y_AXIS 1 |
| 179 | #define ADXL_Z_AXIS 2 |
| 180 | |
| 181 | #define AC_READ(ac, reg) ((ac)->bops->read((ac)->dev, reg)) |
| 182 | #define AC_WRITE(ac, reg, val) ((ac)->bops->write((ac)->dev, reg, val)) |
| 183 | |
| 184 | struct axis_triple { |
| 185 | int x; |
| 186 | int y; |
| 187 | int z; |
| 188 | }; |
| 189 | |
| 190 | struct adxl34x { |
| 191 | struct device *dev; |
| 192 | struct input_dev *input; |
| 193 | struct mutex mutex; /* reentrant protection for struct */ |
| 194 | struct adxl34x_platform_data pdata; |
| 195 | struct axis_triple swcal; |
| 196 | struct axis_triple hwcal; |
| 197 | struct axis_triple saved; |
| 198 | char phys[32]; |
| 199 | unsigned orient2d_saved; |
| 200 | unsigned orient3d_saved; |
| 201 | bool disabled; /* P: mutex */ |
| 202 | bool opened; /* P: mutex */ |
| 203 | bool suspended; /* P: mutex */ |
| 204 | bool fifo_delay; |
| 205 | int irq; |
| 206 | unsigned model; |
| 207 | unsigned int_mask; |
| 208 | |
| 209 | const struct adxl34x_bus_ops *bops; |
| 210 | }; |
| 211 | |
| 212 | static const struct adxl34x_platform_data adxl34x_default_init = { |
| 213 | .tap_threshold = 35, |
| 214 | .tap_duration = 3, |
| 215 | .tap_latency = 20, |
| 216 | .tap_window = 20, |
| 217 | .tap_axis_control = ADXL_TAP_X_EN | ADXL_TAP_Y_EN | ADXL_TAP_Z_EN, |
| 218 | .act_axis_control = 0xFF, |
| 219 | .activity_threshold = 6, |
| 220 | .inactivity_threshold = 4, |
| 221 | .inactivity_time = 3, |
| 222 | .free_fall_threshold = 8, |
| 223 | .free_fall_time = 0x20, |
| 224 | .data_rate = 8, |
| 225 | .data_range = ADXL_FULL_RES, |
| 226 | |
| 227 | .ev_type = EV_ABS, |
| 228 | .ev_code_x = ABS_X, /* EV_REL */ |
| 229 | .ev_code_y = ABS_Y, /* EV_REL */ |
| 230 | .ev_code_z = ABS_Z, /* EV_REL */ |
| 231 | |
| 232 | .ev_code_tap = {BTN_TOUCH, BTN_TOUCH, BTN_TOUCH}, /* EV_KEY {x,y,z} */ |
| 233 | .power_mode = ADXL_AUTO_SLEEP | ADXL_LINK, |
| 234 | .fifo_mode = ADXL_FIFO_STREAM, |
| 235 | .watermark = 0, |
| 236 | }; |
| 237 | |
| 238 | static void adxl34x_get_triple(struct adxl34x *ac, struct axis_triple *axis) |
| 239 | { |
| 240 | short buf[3]; |
| 241 | |
| 242 | ac->bops->read_block(ac->dev, DATAX0, DATAZ1 - DATAX0 + 1, buf); |
| 243 | |
| 244 | mutex_lock(&ac->mutex); |
| 245 | ac->saved.x = (s16) le16_to_cpu(buf[0]); |
| 246 | axis->x = ac->saved.x; |
| 247 | |
| 248 | ac->saved.y = (s16) le16_to_cpu(buf[1]); |
| 249 | axis->y = ac->saved.y; |
| 250 | |
| 251 | ac->saved.z = (s16) le16_to_cpu(buf[2]); |
| 252 | axis->z = ac->saved.z; |
| 253 | mutex_unlock(&ac->mutex); |
| 254 | } |
| 255 | |
| 256 | static void adxl34x_service_ev_fifo(struct adxl34x *ac) |
| 257 | { |
| 258 | struct adxl34x_platform_data *pdata = &ac->pdata; |
| 259 | struct axis_triple axis; |
| 260 | |
| 261 | adxl34x_get_triple(ac, &axis); |
| 262 | |
| 263 | input_event(ac->input, pdata->ev_type, pdata->ev_code_x, |
| 264 | axis.x - ac->swcal.x); |
| 265 | input_event(ac->input, pdata->ev_type, pdata->ev_code_y, |
| 266 | axis.y - ac->swcal.y); |
| 267 | input_event(ac->input, pdata->ev_type, pdata->ev_code_z, |
| 268 | axis.z - ac->swcal.z); |
| 269 | } |
| 270 | |
| 271 | static void adxl34x_report_key_single(struct input_dev *input, int key) |
| 272 | { |
| 273 | input_report_key(input, key, true); |
| 274 | input_sync(input); |
| 275 | input_report_key(input, key, false); |
| 276 | } |
| 277 | |
| 278 | static void adxl34x_send_key_events(struct adxl34x *ac, |
| 279 | struct adxl34x_platform_data *pdata, int status, int press) |
| 280 | { |
| 281 | int i; |
| 282 | |
| 283 | for (i = ADXL_X_AXIS; i <= ADXL_Z_AXIS; i++) { |
| 284 | if (status & (1 << (ADXL_Z_AXIS - i))) |
| 285 | input_report_key(ac->input, |
| 286 | pdata->ev_code_tap[i], press); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | static void adxl34x_do_tap(struct adxl34x *ac, |
| 291 | struct adxl34x_platform_data *pdata, int status) |
| 292 | { |
| 293 | adxl34x_send_key_events(ac, pdata, status, true); |
| 294 | input_sync(ac->input); |
| 295 | adxl34x_send_key_events(ac, pdata, status, false); |
| 296 | } |
| 297 | |
| 298 | static irqreturn_t adxl34x_irq(int irq, void *handle) |
| 299 | { |
| 300 | struct adxl34x *ac = handle; |
| 301 | struct adxl34x_platform_data *pdata = &ac->pdata; |
| 302 | int int_stat, tap_stat, samples, orient, orient_code; |
| 303 | |
| 304 | /* |
| 305 | * ACT_TAP_STATUS should be read before clearing the interrupt |
| 306 | * Avoid reading ACT_TAP_STATUS in case TAP detection is disabled |
| 307 | */ |
| 308 | |
| 309 | if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) |
| 310 | tap_stat = AC_READ(ac, ACT_TAP_STATUS); |
| 311 | else |
| 312 | tap_stat = 0; |
| 313 | |
| 314 | int_stat = AC_READ(ac, INT_SOURCE); |
| 315 | |
| 316 | if (int_stat & FREE_FALL) |
| 317 | adxl34x_report_key_single(ac->input, pdata->ev_code_ff); |
| 318 | |
| 319 | if (int_stat & OVERRUN) |
| 320 | dev_dbg(ac->dev, "OVERRUN\n"); |
| 321 | |
| 322 | if (int_stat & (SINGLE_TAP | DOUBLE_TAP)) { |
| 323 | adxl34x_do_tap(ac, pdata, tap_stat); |
| 324 | |
| 325 | if (int_stat & DOUBLE_TAP) |
| 326 | adxl34x_do_tap(ac, pdata, tap_stat); |
| 327 | } |
| 328 | |
| 329 | if (pdata->ev_code_act_inactivity) { |
| 330 | if (int_stat & ACTIVITY) |
| 331 | input_report_key(ac->input, |
| 332 | pdata->ev_code_act_inactivity, 1); |
| 333 | if (int_stat & INACTIVITY) |
| 334 | input_report_key(ac->input, |
| 335 | pdata->ev_code_act_inactivity, 0); |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * ORIENTATION SENSING ADXL346 only |
| 340 | */ |
| 341 | if (pdata->orientation_enable) { |
| 342 | orient = AC_READ(ac, ORIENT); |
| 343 | if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_2D) && |
| 344 | (orient & ADXL346_2D_VALID)) { |
| 345 | |
| 346 | orient_code = ADXL346_2D_ORIENT(orient); |
| 347 | /* Report orientation only when it changes */ |
| 348 | if (ac->orient2d_saved != orient_code) { |
| 349 | ac->orient2d_saved = orient_code; |
| 350 | adxl34x_report_key_single(ac->input, |
| 351 | pdata->ev_codes_orient_2d[orient_code]); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | if ((pdata->orientation_enable & ADXL_EN_ORIENTATION_3D) && |
| 356 | (orient & ADXL346_3D_VALID)) { |
| 357 | |
| 358 | orient_code = ADXL346_3D_ORIENT(orient) - 1; |
| 359 | /* Report orientation only when it changes */ |
| 360 | if (ac->orient3d_saved != orient_code) { |
| 361 | ac->orient3d_saved = orient_code; |
| 362 | adxl34x_report_key_single(ac->input, |
| 363 | pdata->ev_codes_orient_3d[orient_code]); |
| 364 | } |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | if (int_stat & (DATA_READY | WATERMARK)) { |
| 369 | |
| 370 | if (pdata->fifo_mode) |
| 371 | samples = ENTRIES(AC_READ(ac, FIFO_STATUS)) + 1; |
| 372 | else |
| 373 | samples = 1; |
| 374 | |
| 375 | for (; samples > 0; samples--) { |
| 376 | adxl34x_service_ev_fifo(ac); |
| 377 | /* |
| 378 | * To ensure that the FIFO has |
| 379 | * completely popped, there must be at least 5 us between |
| 380 | * the end of reading the data registers, signified by the |
| 381 | * transition to register 0x38 from 0x37 or the CS pin |
| 382 | * going high, and the start of new reads of the FIFO or |
| 383 | * reading the FIFO_STATUS register. For SPI operation at |
| 384 | * 1.5 MHz or lower, the register addressing portion of the |
| 385 | * transmission is sufficient delay to ensure the FIFO has |
| 386 | * completely popped. It is necessary for SPI operation |
| 387 | * greater than 1.5 MHz to de-assert the CS pin to ensure a |
| 388 | * total of 5 us, which is at most 3.4 us at 5 MHz |
| 389 | * operation. |
| 390 | */ |
| 391 | if (ac->fifo_delay && (samples > 1)) |
| 392 | udelay(3); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | input_sync(ac->input); |
| 397 | |
| 398 | return IRQ_HANDLED; |
| 399 | } |
| 400 | |
| 401 | static void __adxl34x_disable(struct adxl34x *ac) |
| 402 | { |
| 403 | /* |
| 404 | * A '0' places the ADXL34x into standby mode |
| 405 | * with minimum power consumption. |
| 406 | */ |
| 407 | AC_WRITE(ac, POWER_CTL, 0); |
| 408 | } |
| 409 | |
| 410 | static void __adxl34x_enable(struct adxl34x *ac) |
| 411 | { |
| 412 | AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); |
| 413 | } |
| 414 | |
| 415 | void adxl34x_suspend(struct adxl34x *ac) |
| 416 | { |
| 417 | mutex_lock(&ac->mutex); |
| 418 | |
| 419 | if (!ac->suspended && !ac->disabled && ac->opened) |
| 420 | __adxl34x_disable(ac); |
| 421 | |
| 422 | ac->suspended = true; |
| 423 | |
| 424 | mutex_unlock(&ac->mutex); |
| 425 | } |
| 426 | EXPORT_SYMBOL_GPL(adxl34x_suspend); |
| 427 | |
| 428 | void adxl34x_resume(struct adxl34x *ac) |
| 429 | { |
| 430 | mutex_lock(&ac->mutex); |
| 431 | |
| 432 | if (ac->suspended && !ac->disabled && ac->opened) |
| 433 | __adxl34x_enable(ac); |
| 434 | |
| 435 | ac->suspended = false; |
| 436 | |
| 437 | mutex_unlock(&ac->mutex); |
| 438 | } |
| 439 | EXPORT_SYMBOL_GPL(adxl34x_resume); |
| 440 | |
| 441 | static ssize_t adxl34x_disable_show(struct device *dev, |
| 442 | struct device_attribute *attr, char *buf) |
| 443 | { |
| 444 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 445 | |
| 446 | return sprintf(buf, "%u\n", ac->disabled); |
| 447 | } |
| 448 | |
| 449 | static ssize_t adxl34x_disable_store(struct device *dev, |
| 450 | struct device_attribute *attr, |
| 451 | const char *buf, size_t count) |
| 452 | { |
| 453 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 454 | unsigned int val; |
| 455 | int error; |
| 456 | |
| 457 | error = kstrtouint(buf, 10, &val); |
| 458 | if (error) |
| 459 | return error; |
| 460 | |
| 461 | mutex_lock(&ac->mutex); |
| 462 | |
| 463 | if (!ac->suspended && ac->opened) { |
| 464 | if (val) { |
| 465 | if (!ac->disabled) |
| 466 | __adxl34x_disable(ac); |
| 467 | } else { |
| 468 | if (ac->disabled) |
| 469 | __adxl34x_enable(ac); |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | ac->disabled = !!val; |
| 474 | |
| 475 | mutex_unlock(&ac->mutex); |
| 476 | |
| 477 | return count; |
| 478 | } |
| 479 | |
| 480 | static DEVICE_ATTR(disable, 0664, adxl34x_disable_show, adxl34x_disable_store); |
| 481 | |
| 482 | static ssize_t adxl34x_calibrate_show(struct device *dev, |
| 483 | struct device_attribute *attr, char *buf) |
| 484 | { |
| 485 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 486 | ssize_t count; |
| 487 | |
| 488 | mutex_lock(&ac->mutex); |
| 489 | count = sprintf(buf, "%d,%d,%d\n", |
| 490 | ac->hwcal.x * 4 + ac->swcal.x, |
| 491 | ac->hwcal.y * 4 + ac->swcal.y, |
| 492 | ac->hwcal.z * 4 + ac->swcal.z); |
| 493 | mutex_unlock(&ac->mutex); |
| 494 | |
| 495 | return count; |
| 496 | } |
| 497 | |
| 498 | static ssize_t adxl34x_calibrate_store(struct device *dev, |
| 499 | struct device_attribute *attr, |
| 500 | const char *buf, size_t count) |
| 501 | { |
| 502 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 503 | |
| 504 | /* |
| 505 | * Hardware offset calibration has a resolution of 15.6 mg/LSB. |
| 506 | * We use HW calibration and handle the remaining bits in SW. (4mg/LSB) |
| 507 | */ |
| 508 | |
| 509 | mutex_lock(&ac->mutex); |
| 510 | ac->hwcal.x -= (ac->saved.x / 4); |
| 511 | ac->swcal.x = ac->saved.x % 4; |
| 512 | |
| 513 | ac->hwcal.y -= (ac->saved.y / 4); |
| 514 | ac->swcal.y = ac->saved.y % 4; |
| 515 | |
| 516 | ac->hwcal.z -= (ac->saved.z / 4); |
| 517 | ac->swcal.z = ac->saved.z % 4; |
| 518 | |
| 519 | AC_WRITE(ac, OFSX, (s8) ac->hwcal.x); |
| 520 | AC_WRITE(ac, OFSY, (s8) ac->hwcal.y); |
| 521 | AC_WRITE(ac, OFSZ, (s8) ac->hwcal.z); |
| 522 | mutex_unlock(&ac->mutex); |
| 523 | |
| 524 | return count; |
| 525 | } |
| 526 | |
| 527 | static DEVICE_ATTR(calibrate, 0664, |
| 528 | adxl34x_calibrate_show, adxl34x_calibrate_store); |
| 529 | |
| 530 | static ssize_t adxl34x_rate_show(struct device *dev, |
| 531 | struct device_attribute *attr, char *buf) |
| 532 | { |
| 533 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 534 | |
| 535 | return sprintf(buf, "%u\n", RATE(ac->pdata.data_rate)); |
| 536 | } |
| 537 | |
| 538 | static ssize_t adxl34x_rate_store(struct device *dev, |
| 539 | struct device_attribute *attr, |
| 540 | const char *buf, size_t count) |
| 541 | { |
| 542 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 543 | unsigned char val; |
| 544 | int error; |
| 545 | |
| 546 | error = kstrtou8(buf, 10, &val); |
| 547 | if (error) |
| 548 | return error; |
| 549 | |
| 550 | mutex_lock(&ac->mutex); |
| 551 | |
| 552 | ac->pdata.data_rate = RATE(val); |
| 553 | AC_WRITE(ac, BW_RATE, |
| 554 | ac->pdata.data_rate | |
| 555 | (ac->pdata.low_power_mode ? LOW_POWER : 0)); |
| 556 | |
| 557 | mutex_unlock(&ac->mutex); |
| 558 | |
| 559 | return count; |
| 560 | } |
| 561 | |
| 562 | static DEVICE_ATTR(rate, 0664, adxl34x_rate_show, adxl34x_rate_store); |
| 563 | |
| 564 | static ssize_t adxl34x_autosleep_show(struct device *dev, |
| 565 | struct device_attribute *attr, char *buf) |
| 566 | { |
| 567 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 568 | |
| 569 | return sprintf(buf, "%u\n", |
| 570 | ac->pdata.power_mode & (PCTL_AUTO_SLEEP | PCTL_LINK) ? 1 : 0); |
| 571 | } |
| 572 | |
| 573 | static ssize_t adxl34x_autosleep_store(struct device *dev, |
| 574 | struct device_attribute *attr, |
| 575 | const char *buf, size_t count) |
| 576 | { |
| 577 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 578 | unsigned int val; |
| 579 | int error; |
| 580 | |
| 581 | error = kstrtouint(buf, 10, &val); |
| 582 | if (error) |
| 583 | return error; |
| 584 | |
| 585 | mutex_lock(&ac->mutex); |
| 586 | |
| 587 | if (val) |
| 588 | ac->pdata.power_mode |= (PCTL_AUTO_SLEEP | PCTL_LINK); |
| 589 | else |
| 590 | ac->pdata.power_mode &= ~(PCTL_AUTO_SLEEP | PCTL_LINK); |
| 591 | |
| 592 | if (!ac->disabled && !ac->suspended && ac->opened) |
| 593 | AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); |
| 594 | |
| 595 | mutex_unlock(&ac->mutex); |
| 596 | |
| 597 | return count; |
| 598 | } |
| 599 | |
| 600 | static DEVICE_ATTR(autosleep, 0664, |
| 601 | adxl34x_autosleep_show, adxl34x_autosleep_store); |
| 602 | |
| 603 | static ssize_t adxl34x_position_show(struct device *dev, |
| 604 | struct device_attribute *attr, char *buf) |
| 605 | { |
| 606 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 607 | ssize_t count; |
| 608 | |
| 609 | mutex_lock(&ac->mutex); |
| 610 | count = sprintf(buf, "(%d, %d, %d)\n", |
| 611 | ac->saved.x, ac->saved.y, ac->saved.z); |
| 612 | mutex_unlock(&ac->mutex); |
| 613 | |
| 614 | return count; |
| 615 | } |
| 616 | |
| 617 | static DEVICE_ATTR(position, S_IRUGO, adxl34x_position_show, NULL); |
| 618 | |
| 619 | #ifdef ADXL_DEBUG |
| 620 | static ssize_t adxl34x_write_store(struct device *dev, |
| 621 | struct device_attribute *attr, |
| 622 | const char *buf, size_t count) |
| 623 | { |
| 624 | struct adxl34x *ac = dev_get_drvdata(dev); |
| 625 | unsigned int val; |
| 626 | int error; |
| 627 | |
| 628 | /* |
| 629 | * This allows basic ADXL register write access for debug purposes. |
| 630 | */ |
| 631 | error = kstrtouint(buf, 16, &val); |
| 632 | if (error) |
| 633 | return error; |
| 634 | |
| 635 | mutex_lock(&ac->mutex); |
| 636 | AC_WRITE(ac, val >> 8, val & 0xFF); |
| 637 | mutex_unlock(&ac->mutex); |
| 638 | |
| 639 | return count; |
| 640 | } |
| 641 | |
| 642 | static DEVICE_ATTR(write, 0664, NULL, adxl34x_write_store); |
| 643 | #endif |
| 644 | |
| 645 | static struct attribute *adxl34x_attributes[] = { |
| 646 | &dev_attr_disable.attr, |
| 647 | &dev_attr_calibrate.attr, |
| 648 | &dev_attr_rate.attr, |
| 649 | &dev_attr_autosleep.attr, |
| 650 | &dev_attr_position.attr, |
| 651 | #ifdef ADXL_DEBUG |
| 652 | &dev_attr_write.attr, |
| 653 | #endif |
| 654 | NULL |
| 655 | }; |
| 656 | |
| 657 | static const struct attribute_group adxl34x_attr_group = { |
| 658 | .attrs = adxl34x_attributes, |
| 659 | }; |
| 660 | |
| 661 | static int adxl34x_input_open(struct input_dev *input) |
| 662 | { |
| 663 | struct adxl34x *ac = input_get_drvdata(input); |
| 664 | |
| 665 | mutex_lock(&ac->mutex); |
| 666 | |
| 667 | if (!ac->suspended && !ac->disabled) |
| 668 | __adxl34x_enable(ac); |
| 669 | |
| 670 | ac->opened = true; |
| 671 | |
| 672 | mutex_unlock(&ac->mutex); |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | static void adxl34x_input_close(struct input_dev *input) |
| 678 | { |
| 679 | struct adxl34x *ac = input_get_drvdata(input); |
| 680 | |
| 681 | mutex_lock(&ac->mutex); |
| 682 | |
| 683 | if (!ac->suspended && !ac->disabled) |
| 684 | __adxl34x_disable(ac); |
| 685 | |
| 686 | ac->opened = false; |
| 687 | |
| 688 | mutex_unlock(&ac->mutex); |
| 689 | } |
| 690 | |
| 691 | struct adxl34x *adxl34x_probe(struct device *dev, int irq, |
| 692 | bool fifo_delay_default, |
| 693 | const struct adxl34x_bus_ops *bops) |
| 694 | { |
| 695 | struct adxl34x *ac; |
| 696 | struct input_dev *input_dev; |
| 697 | const struct adxl34x_platform_data *pdata; |
| 698 | int err, range, i; |
| 699 | unsigned char revid; |
| 700 | |
| 701 | if (!irq) { |
| 702 | dev_err(dev, "no IRQ?\n"); |
| 703 | err = -ENODEV; |
| 704 | goto err_out; |
| 705 | } |
| 706 | |
| 707 | ac = kzalloc(sizeof(*ac), GFP_KERNEL); |
| 708 | input_dev = input_allocate_device(); |
| 709 | if (!ac || !input_dev) { |
| 710 | err = -ENOMEM; |
| 711 | goto err_free_mem; |
| 712 | } |
| 713 | |
| 714 | ac->fifo_delay = fifo_delay_default; |
| 715 | |
| 716 | pdata = dev_get_platdata(dev); |
| 717 | if (!pdata) { |
| 718 | dev_dbg(dev, |
| 719 | "No platform data: Using default initialization\n"); |
| 720 | pdata = &adxl34x_default_init; |
| 721 | } |
| 722 | |
| 723 | ac->pdata = *pdata; |
| 724 | pdata = &ac->pdata; |
| 725 | |
| 726 | ac->input = input_dev; |
| 727 | ac->dev = dev; |
| 728 | ac->irq = irq; |
| 729 | ac->bops = bops; |
| 730 | |
| 731 | mutex_init(&ac->mutex); |
| 732 | |
| 733 | input_dev->name = "ADXL34x accelerometer"; |
| 734 | revid = AC_READ(ac, DEVID); |
| 735 | |
| 736 | switch (revid) { |
| 737 | case ID_ADXL345: |
| 738 | ac->model = 345; |
| 739 | break; |
| 740 | case ID_ADXL346: |
| 741 | ac->model = 346; |
| 742 | break; |
| 743 | default: |
| 744 | dev_err(dev, "Failed to probe %s\n", input_dev->name); |
| 745 | err = -ENODEV; |
| 746 | goto err_free_mem; |
| 747 | } |
| 748 | |
| 749 | snprintf(ac->phys, sizeof(ac->phys), "%s/input0", dev_name(dev)); |
| 750 | |
| 751 | input_dev->phys = ac->phys; |
| 752 | input_dev->dev.parent = dev; |
| 753 | input_dev->id.product = ac->model; |
| 754 | input_dev->id.bustype = bops->bustype; |
| 755 | input_dev->open = adxl34x_input_open; |
| 756 | input_dev->close = adxl34x_input_close; |
| 757 | |
| 758 | input_set_drvdata(input_dev, ac); |
| 759 | |
| 760 | __set_bit(ac->pdata.ev_type, input_dev->evbit); |
| 761 | |
| 762 | if (ac->pdata.ev_type == EV_REL) { |
| 763 | __set_bit(REL_X, input_dev->relbit); |
| 764 | __set_bit(REL_Y, input_dev->relbit); |
| 765 | __set_bit(REL_Z, input_dev->relbit); |
| 766 | } else { |
| 767 | /* EV_ABS */ |
| 768 | __set_bit(ABS_X, input_dev->absbit); |
| 769 | __set_bit(ABS_Y, input_dev->absbit); |
| 770 | __set_bit(ABS_Z, input_dev->absbit); |
| 771 | |
| 772 | if (pdata->data_range & FULL_RES) |
| 773 | range = ADXL_FULLRES_MAX_VAL; /* Signed 13-bit */ |
| 774 | else |
| 775 | range = ADXL_FIXEDRES_MAX_VAL; /* Signed 10-bit */ |
| 776 | |
| 777 | input_set_abs_params(input_dev, ABS_X, -range, range, 3, 3); |
| 778 | input_set_abs_params(input_dev, ABS_Y, -range, range, 3, 3); |
| 779 | input_set_abs_params(input_dev, ABS_Z, -range, range, 3, 3); |
| 780 | } |
| 781 | |
| 782 | __set_bit(EV_KEY, input_dev->evbit); |
| 783 | __set_bit(pdata->ev_code_tap[ADXL_X_AXIS], input_dev->keybit); |
| 784 | __set_bit(pdata->ev_code_tap[ADXL_Y_AXIS], input_dev->keybit); |
| 785 | __set_bit(pdata->ev_code_tap[ADXL_Z_AXIS], input_dev->keybit); |
| 786 | |
| 787 | if (pdata->ev_code_ff) { |
| 788 | ac->int_mask = FREE_FALL; |
| 789 | __set_bit(pdata->ev_code_ff, input_dev->keybit); |
| 790 | } |
| 791 | |
| 792 | if (pdata->ev_code_act_inactivity) |
| 793 | __set_bit(pdata->ev_code_act_inactivity, input_dev->keybit); |
| 794 | |
| 795 | ac->int_mask |= ACTIVITY | INACTIVITY; |
| 796 | |
| 797 | if (pdata->watermark) { |
| 798 | ac->int_mask |= WATERMARK; |
| 799 | if (!FIFO_MODE(pdata->fifo_mode)) |
| 800 | ac->pdata.fifo_mode |= FIFO_STREAM; |
| 801 | } else { |
| 802 | ac->int_mask |= DATA_READY; |
| 803 | } |
| 804 | |
| 805 | if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) |
| 806 | ac->int_mask |= SINGLE_TAP | DOUBLE_TAP; |
| 807 | |
| 808 | if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS) |
| 809 | ac->fifo_delay = false; |
| 810 | |
| 811 | AC_WRITE(ac, POWER_CTL, 0); |
| 812 | |
| 813 | err = request_threaded_irq(ac->irq, NULL, adxl34x_irq, |
| 814 | IRQF_TRIGGER_HIGH | IRQF_ONESHOT, |
| 815 | dev_name(dev), ac); |
| 816 | if (err) { |
| 817 | dev_err(dev, "irq %d busy?\n", ac->irq); |
| 818 | goto err_free_mem; |
| 819 | } |
| 820 | |
| 821 | err = sysfs_create_group(&dev->kobj, &adxl34x_attr_group); |
| 822 | if (err) |
| 823 | goto err_free_irq; |
| 824 | |
| 825 | err = input_register_device(input_dev); |
| 826 | if (err) |
| 827 | goto err_remove_attr; |
| 828 | |
| 829 | AC_WRITE(ac, OFSX, pdata->x_axis_offset); |
| 830 | ac->hwcal.x = pdata->x_axis_offset; |
| 831 | AC_WRITE(ac, OFSY, pdata->y_axis_offset); |
| 832 | ac->hwcal.y = pdata->y_axis_offset; |
| 833 | AC_WRITE(ac, OFSZ, pdata->z_axis_offset); |
| 834 | ac->hwcal.z = pdata->z_axis_offset; |
| 835 | AC_WRITE(ac, THRESH_TAP, pdata->tap_threshold); |
| 836 | AC_WRITE(ac, DUR, pdata->tap_duration); |
| 837 | AC_WRITE(ac, LATENT, pdata->tap_latency); |
| 838 | AC_WRITE(ac, WINDOW, pdata->tap_window); |
| 839 | AC_WRITE(ac, THRESH_ACT, pdata->activity_threshold); |
| 840 | AC_WRITE(ac, THRESH_INACT, pdata->inactivity_threshold); |
| 841 | AC_WRITE(ac, TIME_INACT, pdata->inactivity_time); |
| 842 | AC_WRITE(ac, THRESH_FF, pdata->free_fall_threshold); |
| 843 | AC_WRITE(ac, TIME_FF, pdata->free_fall_time); |
| 844 | AC_WRITE(ac, TAP_AXES, pdata->tap_axis_control); |
| 845 | AC_WRITE(ac, ACT_INACT_CTL, pdata->act_axis_control); |
| 846 | AC_WRITE(ac, BW_RATE, RATE(ac->pdata.data_rate) | |
| 847 | (pdata->low_power_mode ? LOW_POWER : 0)); |
| 848 | AC_WRITE(ac, DATA_FORMAT, pdata->data_range); |
| 849 | AC_WRITE(ac, FIFO_CTL, FIFO_MODE(pdata->fifo_mode) | |
| 850 | SAMPLES(pdata->watermark)); |
| 851 | |
| 852 | if (pdata->use_int2) { |
| 853 | /* Map all INTs to INT2 */ |
| 854 | AC_WRITE(ac, INT_MAP, ac->int_mask | OVERRUN); |
| 855 | } else { |
| 856 | /* Map all INTs to INT1 */ |
| 857 | AC_WRITE(ac, INT_MAP, 0); |
| 858 | } |
| 859 | |
| 860 | if (ac->model == 346 && ac->pdata.orientation_enable) { |
| 861 | AC_WRITE(ac, ORIENT_CONF, |
| 862 | ORIENT_DEADZONE(ac->pdata.deadzone_angle) | |
| 863 | ORIENT_DIVISOR(ac->pdata.divisor_length)); |
| 864 | |
| 865 | ac->orient2d_saved = 1234; |
| 866 | ac->orient3d_saved = 1234; |
| 867 | |
| 868 | if (pdata->orientation_enable & ADXL_EN_ORIENTATION_3D) |
| 869 | for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_3d); i++) |
| 870 | __set_bit(pdata->ev_codes_orient_3d[i], |
| 871 | input_dev->keybit); |
| 872 | |
| 873 | if (pdata->orientation_enable & ADXL_EN_ORIENTATION_2D) |
| 874 | for (i = 0; i < ARRAY_SIZE(pdata->ev_codes_orient_2d); i++) |
| 875 | __set_bit(pdata->ev_codes_orient_2d[i], |
| 876 | input_dev->keybit); |
| 877 | } else { |
| 878 | ac->pdata.orientation_enable = 0; |
| 879 | } |
| 880 | |
| 881 | AC_WRITE(ac, INT_ENABLE, ac->int_mask | OVERRUN); |
| 882 | |
| 883 | ac->pdata.power_mode &= (PCTL_AUTO_SLEEP | PCTL_LINK); |
| 884 | |
| 885 | return ac; |
| 886 | |
| 887 | err_remove_attr: |
| 888 | sysfs_remove_group(&dev->kobj, &adxl34x_attr_group); |
| 889 | err_free_irq: |
| 890 | free_irq(ac->irq, ac); |
| 891 | err_free_mem: |
| 892 | input_free_device(input_dev); |
| 893 | kfree(ac); |
| 894 | err_out: |
| 895 | return ERR_PTR(err); |
| 896 | } |
| 897 | EXPORT_SYMBOL_GPL(adxl34x_probe); |
| 898 | |
| 899 | int adxl34x_remove(struct adxl34x *ac) |
| 900 | { |
| 901 | sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group); |
| 902 | free_irq(ac->irq, ac); |
| 903 | input_unregister_device(ac->input); |
| 904 | dev_dbg(ac->dev, "unregistered accelerometer\n"); |
| 905 | kfree(ac); |
| 906 | |
| 907 | return 0; |
| 908 | } |
| 909 | EXPORT_SYMBOL_GPL(adxl34x_remove); |
| 910 | |
| 911 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 912 | MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer Driver"); |
| 913 | MODULE_LICENSE("GPL"); |