1 /*
2 * lis3lv02d.c - ST LIS3LV02DL accelerometer driver
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #include <linux/kernel.h>
26 #include <linux/sched/signal.h>
27 #include <linux/dmi.h>
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/input-polldev.h>
33 #include <linux/delay.h>
34 #include <linux/wait.h>
35 #include <linux/poll.h>
36 #include <linux/slab.h>
37 #include <linux/freezer.h>
38 #include <linux/uaccess.h>
39 #include <linux/miscdevice.h>
40 #include <linux/pm_runtime.h>
41 #include <linux/atomic.h>
42 #include <linux/of_device.h>
43 #include "lis3lv02d.h"
44
45 #define DRIVER_NAME "lis3lv02d"
46
47 /* joystick device poll interval in milliseconds */
48 #define MDPS_POLL_INTERVAL 50
49 #define MDPS_POLL_MIN 0
50 #define MDPS_POLL_MAX 2000
51
52 #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */
53
54 #define SELFTEST_OK 0
55 #define SELFTEST_FAIL -1
56 #define SELFTEST_IRQ -2
57
58 #define IRQ_LINE0 0
59 #define IRQ_LINE1 1
60
61 /*
62 * The sensor can also generate interrupts (DRDY) but it's pretty pointless
63 * because they are generated even if the data do not change. So it's better
64 * to keep the interrupt for the free-fall event. The values are updated at
65 * 40Hz (at the lowest frequency), but as it can be pretty time consuming on
66 * some low processor, we poll the sensor only at 20Hz... enough for the
67 * joystick.
68 */
69
70 #define LIS3_PWRON_DELAY_WAI_12B (5000)
71 #define LIS3_PWRON_DELAY_WAI_8B (3000)
72
73 /*
74 * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
75 * LIS302D spec says: 18 mG / digit
76 * LIS3_ACCURACY is used to increase accuracy of the intermediate
77 * calculation results.
78 */
79 #define LIS3_ACCURACY 1024
80 /* Sensitivity values for -2G +2G scale */
81 #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
82 #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
83
84 /*
85 * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG.
86 * Below macros defines sensitivity values for +/-2G. Dataout bits for
87 * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit
88 * data from 16bit value. Currently this driver supports only 2G range.
89 */
90 #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024)
91 #define SHIFT_ADJ_2G 4
92
93 #define LIS3_DEFAULT_FUZZ_12B 3
94 #define LIS3_DEFAULT_FLAT_12B 3
95 #define LIS3_DEFAULT_FUZZ_8B 1
96 #define LIS3_DEFAULT_FLAT_8B 1
97
98 struct lis3lv02d lis3_dev = {
99 .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
100 };
101 EXPORT_SYMBOL_GPL(lis3_dev);
102
103 /* just like param_set_int() but does sanity-check so that it won't point
104 * over the axis array size
105 */
param_set_axis(const char * val,const struct kernel_param * kp)106 static int param_set_axis(const char *val, const struct kernel_param *kp)
107 {
108 int ret = param_set_int(val, kp);
109 if (!ret) {
110 int val = *(int *)kp->arg;
111 if (val < 0)
112 val = -val;
113 if (!val || val > 3)
114 return -EINVAL;
115 }
116 return ret;
117 }
118
119 static const struct kernel_param_ops param_ops_axis = {
120 .set = param_set_axis,
121 .get = param_get_int,
122 };
123
124 #define param_check_axis(name, p) param_check_int(name, p)
125
126 module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644);
127 MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions");
128
lis3lv02d_read_8(struct lis3lv02d * lis3,int reg)129 static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
130 {
131 s8 lo;
132 if (lis3->read(lis3, reg, &lo) < 0)
133 return 0;
134
135 return lo;
136 }
137
lis3lv02d_read_12(struct lis3lv02d * lis3,int reg)138 static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
139 {
140 u8 lo, hi;
141
142 lis3->read(lis3, reg - 1, &lo);
143 lis3->read(lis3, reg, &hi);
144 /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
145 return (s16)((hi << 8) | lo);
146 }
147
148 /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */
lis331dlh_read_data(struct lis3lv02d * lis3,int reg)149 static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg)
150 {
151 u8 lo, hi;
152 int v;
153
154 lis3->read(lis3, reg - 1, &lo);
155 lis3->read(lis3, reg, &hi);
156 v = (int) ((hi << 8) | lo);
157
158 return (s16) v >> lis3->shift_adj;
159 }
160
161 /**
162 * lis3lv02d_get_axis - For the given axis, give the value converted
163 * @axis: 1,2,3 - can also be negative
164 * @hw_values: raw values returned by the hardware
165 *
166 * Returns the converted value.
167 */
lis3lv02d_get_axis(s8 axis,int hw_values[3])168 static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3])
169 {
170 if (axis > 0)
171 return hw_values[axis - 1];
172 else
173 return -hw_values[-axis - 1];
174 }
175
176 /**
177 * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
178 * @lis3: pointer to the device struct
179 * @x: where to store the X axis value
180 * @y: where to store the Y axis value
181 * @z: where to store the Z axis value
182 *
183 * Note that 40Hz input device can eat up about 10% CPU at 800MHZ
184 */
lis3lv02d_get_xyz(struct lis3lv02d * lis3,int * x,int * y,int * z)185 static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
186 {
187 int position[3];
188 int i;
189
190 if (lis3->blkread) {
191 if (lis3->whoami == WAI_12B) {
192 u16 data[3];
193 lis3->blkread(lis3, OUTX_L, 6, (u8 *)data);
194 for (i = 0; i < 3; i++)
195 position[i] = (s16)le16_to_cpu(data[i]);
196 } else {
197 u8 data[5];
198 /* Data: x, dummy, y, dummy, z */
199 lis3->blkread(lis3, OUTX, 5, data);
200 for (i = 0; i < 3; i++)
201 position[i] = (s8)data[i * 2];
202 }
203 } else {
204 position[0] = lis3->read_data(lis3, OUTX);
205 position[1] = lis3->read_data(lis3, OUTY);
206 position[2] = lis3->read_data(lis3, OUTZ);
207 }
208
209 for (i = 0; i < 3; i++)
210 position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
211
212 *x = lis3lv02d_get_axis(lis3->ac.x, position);
213 *y = lis3lv02d_get_axis(lis3->ac.y, position);
214 *z = lis3lv02d_get_axis(lis3->ac.z, position);
215 }
216
217 /* conversion btw sampling rate and the register values */
218 static int lis3_12_rates[4] = {40, 160, 640, 2560};
219 static int lis3_8_rates[2] = {100, 400};
220 static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000};
221 static int lis3_3dlh_rates[4] = {50, 100, 400, 1000};
222
223 /* ODR is Output Data Rate */
lis3lv02d_get_odr_index(struct lis3lv02d * lis3)224 static int lis3lv02d_get_odr_index(struct lis3lv02d *lis3)
225 {
226 u8 ctrl;
227 int shift;
228
229 lis3->read(lis3, CTRL_REG1, &ctrl);
230 ctrl &= lis3->odr_mask;
231 shift = ffs(lis3->odr_mask) - 1;
232 return (ctrl >> shift);
233 }
234
lis3lv02d_get_pwron_wait(struct lis3lv02d * lis3)235 static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3)
236 {
237 int odr_idx = lis3lv02d_get_odr_index(lis3);
238 int div = lis3->odrs[odr_idx];
239
240 if (div == 0) {
241 if (odr_idx == 0) {
242 /* Power-down mode, not sampling no need to sleep */
243 return 0;
244 }
245
246 dev_err(&lis3->pdev->dev, "Error unknown odrs-index: %d\n", odr_idx);
247 return -ENXIO;
248 }
249
250 /* LIS3 power on delay is quite long */
251 msleep(lis3->pwron_delay / div);
252 return 0;
253 }
254
lis3lv02d_set_odr(struct lis3lv02d * lis3,int rate)255 static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate)
256 {
257 u8 ctrl;
258 int i, len, shift;
259
260 if (!rate)
261 return -EINVAL;
262
263 lis3->read(lis3, CTRL_REG1, &ctrl);
264 ctrl &= ~lis3->odr_mask;
265 len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */
266 shift = ffs(lis3->odr_mask) - 1;
267
268 for (i = 0; i < len; i++)
269 if (lis3->odrs[i] == rate) {
270 lis3->write(lis3, CTRL_REG1,
271 ctrl | (i << shift));
272 return 0;
273 }
274 return -EINVAL;
275 }
276
lis3lv02d_selftest(struct lis3lv02d * lis3,s16 results[3])277 static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
278 {
279 u8 ctlreg, reg;
280 s16 x, y, z;
281 u8 selftest;
282 int ret;
283 u8 ctrl_reg_data;
284 unsigned char irq_cfg;
285
286 mutex_lock(&lis3->mutex);
287
288 irq_cfg = lis3->irq_cfg;
289 if (lis3->whoami == WAI_8B) {
290 lis3->data_ready_count[IRQ_LINE0] = 0;
291 lis3->data_ready_count[IRQ_LINE1] = 0;
292
293 /* Change interrupt cfg to data ready for selftest */
294 atomic_inc(&lis3->wake_thread);
295 lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY;
296 lis3->read(lis3, CTRL_REG3, &ctrl_reg_data);
297 lis3->write(lis3, CTRL_REG3, (ctrl_reg_data &
298 ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) |
299 (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY));
300 }
301
302 if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) {
303 ctlreg = CTRL_REG4;
304 selftest = CTRL4_ST0;
305 } else {
306 ctlreg = CTRL_REG1;
307 if (lis3->whoami == WAI_12B)
308 selftest = CTRL1_ST;
309 else
310 selftest = CTRL1_STP;
311 }
312
313 lis3->read(lis3, ctlreg, ®);
314 lis3->write(lis3, ctlreg, (reg | selftest));
315 ret = lis3lv02d_get_pwron_wait(lis3);
316 if (ret)
317 goto fail;
318
319 /* Read directly to avoid axis remap */
320 x = lis3->read_data(lis3, OUTX);
321 y = lis3->read_data(lis3, OUTY);
322 z = lis3->read_data(lis3, OUTZ);
323
324 /* back to normal settings */
325 lis3->write(lis3, ctlreg, reg);
326 ret = lis3lv02d_get_pwron_wait(lis3);
327 if (ret)
328 goto fail;
329
330 results[0] = x - lis3->read_data(lis3, OUTX);
331 results[1] = y - lis3->read_data(lis3, OUTY);
332 results[2] = z - lis3->read_data(lis3, OUTZ);
333
334 ret = 0;
335
336 if (lis3->whoami == WAI_8B) {
337 /* Restore original interrupt configuration */
338 atomic_dec(&lis3->wake_thread);
339 lis3->write(lis3, CTRL_REG3, ctrl_reg_data);
340 lis3->irq_cfg = irq_cfg;
341
342 if ((irq_cfg & LIS3_IRQ1_MASK) &&
343 lis3->data_ready_count[IRQ_LINE0] < 2) {
344 ret = SELFTEST_IRQ;
345 goto fail;
346 }
347
348 if ((irq_cfg & LIS3_IRQ2_MASK) &&
349 lis3->data_ready_count[IRQ_LINE1] < 2) {
350 ret = SELFTEST_IRQ;
351 goto fail;
352 }
353 }
354
355 if (lis3->pdata) {
356 int i;
357 for (i = 0; i < 3; i++) {
358 /* Check against selftest acceptance limits */
359 if ((results[i] < lis3->pdata->st_min_limits[i]) ||
360 (results[i] > lis3->pdata->st_max_limits[i])) {
361 ret = SELFTEST_FAIL;
362 goto fail;
363 }
364 }
365 }
366
367 /* test passed */
368 fail:
369 mutex_unlock(&lis3->mutex);
370 return ret;
371 }
372
373 /*
374 * Order of registers in the list affects to order of the restore process.
375 * Perhaps it is a good idea to set interrupt enable register as a last one
376 * after all other configurations
377 */
378 static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1,
379 FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2,
380 CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ,
381 CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW,
382 CTRL_REG1, CTRL_REG2, CTRL_REG3};
383
384 static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H,
385 FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H,
386 DD_THSE_L, DD_THSE_H,
387 CTRL_REG1, CTRL_REG3, CTRL_REG2};
388
lis3_context_save(struct lis3lv02d * lis3)389 static inline void lis3_context_save(struct lis3lv02d *lis3)
390 {
391 int i;
392 for (i = 0; i < lis3->regs_size; i++)
393 lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]);
394 lis3->regs_stored = true;
395 }
396
lis3_context_restore(struct lis3lv02d * lis3)397 static inline void lis3_context_restore(struct lis3lv02d *lis3)
398 {
399 int i;
400 if (lis3->regs_stored)
401 for (i = 0; i < lis3->regs_size; i++)
402 lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]);
403 }
404
lis3lv02d_poweroff(struct lis3lv02d * lis3)405 void lis3lv02d_poweroff(struct lis3lv02d *lis3)
406 {
407 if (lis3->reg_ctrl)
408 lis3_context_save(lis3);
409 /* disable X,Y,Z axis and power down */
410 lis3->write(lis3, CTRL_REG1, 0x00);
411 if (lis3->reg_ctrl)
412 lis3->reg_ctrl(lis3, LIS3_REG_OFF);
413 }
414 EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
415
lis3lv02d_poweron(struct lis3lv02d * lis3)416 int lis3lv02d_poweron(struct lis3lv02d *lis3)
417 {
418 int err;
419 u8 reg;
420
421 lis3->init(lis3);
422
423 /*
424 * Common configuration
425 * BDU: (12 bits sensors only) LSB and MSB values are not updated until
426 * both have been read. So the value read will always be correct.
427 * Set BOOT bit to refresh factory tuning values.
428 */
429 if (lis3->pdata) {
430 lis3->read(lis3, CTRL_REG2, ®);
431 if (lis3->whoami == WAI_12B)
432 reg |= CTRL2_BDU | CTRL2_BOOT;
433 else if (lis3->whoami == WAI_3DLH)
434 reg |= CTRL2_BOOT_3DLH;
435 else
436 reg |= CTRL2_BOOT_8B;
437 lis3->write(lis3, CTRL_REG2, reg);
438
439 if (lis3->whoami == WAI_3DLH) {
440 lis3->read(lis3, CTRL_REG4, ®);
441 reg |= CTRL4_BDU;
442 lis3->write(lis3, CTRL_REG4, reg);
443 }
444 }
445
446 err = lis3lv02d_get_pwron_wait(lis3);
447 if (err)
448 return err;
449
450 if (lis3->reg_ctrl)
451 lis3_context_restore(lis3);
452
453 return 0;
454 }
455 EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
456
457
lis3lv02d_joystick_poll(struct input_polled_dev * pidev)458 static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
459 {
460 struct lis3lv02d *lis3 = pidev->private;
461 int x, y, z;
462
463 mutex_lock(&lis3->mutex);
464 lis3lv02d_get_xyz(lis3, &x, &y, &z);
465 input_report_abs(pidev->input, ABS_X, x);
466 input_report_abs(pidev->input, ABS_Y, y);
467 input_report_abs(pidev->input, ABS_Z, z);
468 input_sync(pidev->input);
469 mutex_unlock(&lis3->mutex);
470 }
471
lis3lv02d_joystick_open(struct input_polled_dev * pidev)472 static void lis3lv02d_joystick_open(struct input_polled_dev *pidev)
473 {
474 struct lis3lv02d *lis3 = pidev->private;
475
476 if (lis3->pm_dev)
477 pm_runtime_get_sync(lis3->pm_dev);
478
479 if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev)
480 atomic_set(&lis3->wake_thread, 1);
481 /*
482 * Update coordinates for the case where poll interval is 0 and
483 * the chip in running purely under interrupt control
484 */
485 lis3lv02d_joystick_poll(pidev);
486 }
487
lis3lv02d_joystick_close(struct input_polled_dev * pidev)488 static void lis3lv02d_joystick_close(struct input_polled_dev *pidev)
489 {
490 struct lis3lv02d *lis3 = pidev->private;
491
492 atomic_set(&lis3->wake_thread, 0);
493 if (lis3->pm_dev)
494 pm_runtime_put(lis3->pm_dev);
495 }
496
lis302dl_interrupt(int irq,void * data)497 static irqreturn_t lis302dl_interrupt(int irq, void *data)
498 {
499 struct lis3lv02d *lis3 = data;
500
501 if (!test_bit(0, &lis3->misc_opened))
502 goto out;
503
504 /*
505 * Be careful: on some HP laptops the bios force DD when on battery and
506 * the lid is closed. This leads to interrupts as soon as a little move
507 * is done.
508 */
509 atomic_inc(&lis3->count);
510
511 wake_up_interruptible(&lis3->misc_wait);
512 kill_fasync(&lis3->async_queue, SIGIO, POLL_IN);
513 out:
514 if (atomic_read(&lis3->wake_thread))
515 return IRQ_WAKE_THREAD;
516 return IRQ_HANDLED;
517 }
518
lis302dl_interrupt_handle_click(struct lis3lv02d * lis3)519 static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3)
520 {
521 struct input_dev *dev = lis3->idev->input;
522 u8 click_src;
523
524 mutex_lock(&lis3->mutex);
525 lis3->read(lis3, CLICK_SRC, &click_src);
526
527 if (click_src & CLICK_SINGLE_X) {
528 input_report_key(dev, lis3->mapped_btns[0], 1);
529 input_report_key(dev, lis3->mapped_btns[0], 0);
530 }
531
532 if (click_src & CLICK_SINGLE_Y) {
533 input_report_key(dev, lis3->mapped_btns[1], 1);
534 input_report_key(dev, lis3->mapped_btns[1], 0);
535 }
536
537 if (click_src & CLICK_SINGLE_Z) {
538 input_report_key(dev, lis3->mapped_btns[2], 1);
539 input_report_key(dev, lis3->mapped_btns[2], 0);
540 }
541 input_sync(dev);
542 mutex_unlock(&lis3->mutex);
543 }
544
lis302dl_data_ready(struct lis3lv02d * lis3,int index)545 static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index)
546 {
547 int dummy;
548
549 /* Dummy read to ack interrupt */
550 lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy);
551 lis3->data_ready_count[index]++;
552 }
553
lis302dl_interrupt_thread1_8b(int irq,void * data)554 static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data)
555 {
556 struct lis3lv02d *lis3 = data;
557 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK;
558
559 if (irq_cfg == LIS3_IRQ1_CLICK)
560 lis302dl_interrupt_handle_click(lis3);
561 else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY))
562 lis302dl_data_ready(lis3, IRQ_LINE0);
563 else
564 lis3lv02d_joystick_poll(lis3->idev);
565
566 return IRQ_HANDLED;
567 }
568
lis302dl_interrupt_thread2_8b(int irq,void * data)569 static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data)
570 {
571 struct lis3lv02d *lis3 = data;
572 u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK;
573
574 if (irq_cfg == LIS3_IRQ2_CLICK)
575 lis302dl_interrupt_handle_click(lis3);
576 else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY))
577 lis302dl_data_ready(lis3, IRQ_LINE1);
578 else
579 lis3lv02d_joystick_poll(lis3->idev);
580
581 return IRQ_HANDLED;
582 }
583
lis3lv02d_misc_open(struct inode * inode,struct file * file)584 static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
585 {
586 struct lis3lv02d *lis3 = container_of(file->private_data,
587 struct lis3lv02d, miscdev);
588
589 if (test_and_set_bit(0, &lis3->misc_opened))
590 return -EBUSY; /* already open */
591
592 if (lis3->pm_dev)
593 pm_runtime_get_sync(lis3->pm_dev);
594
595 atomic_set(&lis3->count, 0);
596 return 0;
597 }
598
lis3lv02d_misc_release(struct inode * inode,struct file * file)599 static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
600 {
601 struct lis3lv02d *lis3 = container_of(file->private_data,
602 struct lis3lv02d, miscdev);
603
604 clear_bit(0, &lis3->misc_opened); /* release the device */
605 if (lis3->pm_dev)
606 pm_runtime_put(lis3->pm_dev);
607 return 0;
608 }
609
lis3lv02d_misc_read(struct file * file,char __user * buf,size_t count,loff_t * pos)610 static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf,
611 size_t count, loff_t *pos)
612 {
613 struct lis3lv02d *lis3 = container_of(file->private_data,
614 struct lis3lv02d, miscdev);
615
616 DECLARE_WAITQUEUE(wait, current);
617 u32 data;
618 unsigned char byte_data;
619 ssize_t retval = 1;
620
621 if (count < 1)
622 return -EINVAL;
623
624 add_wait_queue(&lis3->misc_wait, &wait);
625 while (true) {
626 set_current_state(TASK_INTERRUPTIBLE);
627 data = atomic_xchg(&lis3->count, 0);
628 if (data)
629 break;
630
631 if (file->f_flags & O_NONBLOCK) {
632 retval = -EAGAIN;
633 goto out;
634 }
635
636 if (signal_pending(current)) {
637 retval = -ERESTARTSYS;
638 goto out;
639 }
640
641 schedule();
642 }
643
644 if (data < 255)
645 byte_data = data;
646 else
647 byte_data = 255;
648
649 /* make sure we are not going into copy_to_user() with
650 * TASK_INTERRUPTIBLE state */
651 set_current_state(TASK_RUNNING);
652 if (copy_to_user(buf, &byte_data, sizeof(byte_data)))
653 retval = -EFAULT;
654
655 out:
656 __set_current_state(TASK_RUNNING);
657 remove_wait_queue(&lis3->misc_wait, &wait);
658
659 return retval;
660 }
661
lis3lv02d_misc_poll(struct file * file,poll_table * wait)662 static __poll_t lis3lv02d_misc_poll(struct file *file, poll_table *wait)
663 {
664 struct lis3lv02d *lis3 = container_of(file->private_data,
665 struct lis3lv02d, miscdev);
666
667 poll_wait(file, &lis3->misc_wait, wait);
668 if (atomic_read(&lis3->count))
669 return EPOLLIN | EPOLLRDNORM;
670 return 0;
671 }
672
lis3lv02d_misc_fasync(int fd,struct file * file,int on)673 static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
674 {
675 struct lis3lv02d *lis3 = container_of(file->private_data,
676 struct lis3lv02d, miscdev);
677
678 return fasync_helper(fd, file, on, &lis3->async_queue);
679 }
680
681 static const struct file_operations lis3lv02d_misc_fops = {
682 .owner = THIS_MODULE,
683 .llseek = no_llseek,
684 .read = lis3lv02d_misc_read,
685 .open = lis3lv02d_misc_open,
686 .release = lis3lv02d_misc_release,
687 .poll = lis3lv02d_misc_poll,
688 .fasync = lis3lv02d_misc_fasync,
689 };
690
lis3lv02d_joystick_enable(struct lis3lv02d * lis3)691 int lis3lv02d_joystick_enable(struct lis3lv02d *lis3)
692 {
693 struct input_dev *input_dev;
694 int err;
695 int max_val, fuzz, flat;
696 int btns[] = {BTN_X, BTN_Y, BTN_Z};
697
698 if (lis3->idev)
699 return -EINVAL;
700
701 lis3->idev = input_allocate_polled_device();
702 if (!lis3->idev)
703 return -ENOMEM;
704
705 lis3->idev->poll = lis3lv02d_joystick_poll;
706 lis3->idev->open = lis3lv02d_joystick_open;
707 lis3->idev->close = lis3lv02d_joystick_close;
708 lis3->idev->poll_interval = MDPS_POLL_INTERVAL;
709 lis3->idev->poll_interval_min = MDPS_POLL_MIN;
710 lis3->idev->poll_interval_max = MDPS_POLL_MAX;
711 lis3->idev->private = lis3;
712 input_dev = lis3->idev->input;
713
714 input_dev->name = "ST LIS3LV02DL Accelerometer";
715 input_dev->phys = DRIVER_NAME "/input0";
716 input_dev->id.bustype = BUS_HOST;
717 input_dev->id.vendor = 0;
718 input_dev->dev.parent = &lis3->pdev->dev;
719
720 set_bit(EV_ABS, input_dev->evbit);
721 max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY;
722 if (lis3->whoami == WAI_12B) {
723 fuzz = LIS3_DEFAULT_FUZZ_12B;
724 flat = LIS3_DEFAULT_FLAT_12B;
725 } else {
726 fuzz = LIS3_DEFAULT_FUZZ_8B;
727 flat = LIS3_DEFAULT_FLAT_8B;
728 }
729 fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY;
730 flat = (flat * lis3->scale) / LIS3_ACCURACY;
731
732 input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
733 input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
734 input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
735
736 lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns);
737 lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns);
738 lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns);
739
740 err = input_register_polled_device(lis3->idev);
741 if (err) {
742 input_free_polled_device(lis3->idev);
743 lis3->idev = NULL;
744 }
745
746 return err;
747 }
748 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable);
749
lis3lv02d_joystick_disable(struct lis3lv02d * lis3)750 void lis3lv02d_joystick_disable(struct lis3lv02d *lis3)
751 {
752 if (lis3->irq)
753 free_irq(lis3->irq, lis3);
754 if (lis3->pdata && lis3->pdata->irq2)
755 free_irq(lis3->pdata->irq2, lis3);
756
757 if (!lis3->idev)
758 return;
759
760 if (lis3->irq)
761 misc_deregister(&lis3->miscdev);
762 input_unregister_polled_device(lis3->idev);
763 input_free_polled_device(lis3->idev);
764 lis3->idev = NULL;
765 }
766 EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
767
768 /* Sysfs stuff */
lis3lv02d_sysfs_poweron(struct lis3lv02d * lis3)769 static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3)
770 {
771 /*
772 * SYSFS functions are fast visitors so put-call
773 * immediately after the get-call. However, keep
774 * chip running for a while and schedule delayed
775 * suspend. This way periodic sysfs calls doesn't
776 * suffer from relatively long power up time.
777 */
778
779 if (lis3->pm_dev) {
780 pm_runtime_get_sync(lis3->pm_dev);
781 pm_runtime_put_noidle(lis3->pm_dev);
782 pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY);
783 }
784 }
785
lis3lv02d_selftest_show(struct device * dev,struct device_attribute * attr,char * buf)786 static ssize_t lis3lv02d_selftest_show(struct device *dev,
787 struct device_attribute *attr, char *buf)
788 {
789 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
790 s16 values[3];
791
792 static const char ok[] = "OK";
793 static const char fail[] = "FAIL";
794 static const char irq[] = "FAIL_IRQ";
795 const char *res;
796
797 lis3lv02d_sysfs_poweron(lis3);
798 switch (lis3lv02d_selftest(lis3, values)) {
799 case SELFTEST_FAIL:
800 res = fail;
801 break;
802 case SELFTEST_IRQ:
803 res = irq;
804 break;
805 case SELFTEST_OK:
806 default:
807 res = ok;
808 break;
809 }
810 return sprintf(buf, "%s %d %d %d\n", res,
811 values[0], values[1], values[2]);
812 }
813
lis3lv02d_position_show(struct device * dev,struct device_attribute * attr,char * buf)814 static ssize_t lis3lv02d_position_show(struct device *dev,
815 struct device_attribute *attr, char *buf)
816 {
817 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
818 int x, y, z;
819
820 lis3lv02d_sysfs_poweron(lis3);
821 mutex_lock(&lis3->mutex);
822 lis3lv02d_get_xyz(lis3, &x, &y, &z);
823 mutex_unlock(&lis3->mutex);
824 return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
825 }
826
lis3lv02d_rate_show(struct device * dev,struct device_attribute * attr,char * buf)827 static ssize_t lis3lv02d_rate_show(struct device *dev,
828 struct device_attribute *attr, char *buf)
829 {
830 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
831 int odr_idx;
832
833 lis3lv02d_sysfs_poweron(lis3);
834
835 odr_idx = lis3lv02d_get_odr_index(lis3);
836 return sprintf(buf, "%d\n", lis3->odrs[odr_idx]);
837 }
838
lis3lv02d_rate_set(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)839 static ssize_t lis3lv02d_rate_set(struct device *dev,
840 struct device_attribute *attr, const char *buf,
841 size_t count)
842 {
843 struct lis3lv02d *lis3 = dev_get_drvdata(dev);
844 unsigned long rate;
845 int ret;
846
847 ret = kstrtoul(buf, 0, &rate);
848 if (ret)
849 return ret;
850
851 lis3lv02d_sysfs_poweron(lis3);
852 if (lis3lv02d_set_odr(lis3, rate))
853 return -EINVAL;
854
855 return count;
856 }
857
858 static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
859 static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
860 static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
861 lis3lv02d_rate_set);
862
863 static struct attribute *lis3lv02d_attributes[] = {
864 &dev_attr_selftest.attr,
865 &dev_attr_position.attr,
866 &dev_attr_rate.attr,
867 NULL
868 };
869
870 static const struct attribute_group lis3lv02d_attribute_group = {
871 .attrs = lis3lv02d_attributes
872 };
873
874
lis3lv02d_add_fs(struct lis3lv02d * lis3)875 static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
876 {
877 lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
878 if (IS_ERR(lis3->pdev))
879 return PTR_ERR(lis3->pdev);
880
881 platform_set_drvdata(lis3->pdev, lis3);
882 return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
883 }
884
lis3lv02d_remove_fs(struct lis3lv02d * lis3)885 int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
886 {
887 sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
888 platform_device_unregister(lis3->pdev);
889 if (lis3->pm_dev) {
890 /* Barrier after the sysfs remove */
891 pm_runtime_barrier(lis3->pm_dev);
892
893 /* SYSFS may have left chip running. Turn off if necessary */
894 if (!pm_runtime_suspended(lis3->pm_dev))
895 lis3lv02d_poweroff(lis3);
896
897 pm_runtime_disable(lis3->pm_dev);
898 pm_runtime_set_suspended(lis3->pm_dev);
899 }
900 kfree(lis3->reg_cache);
901 return 0;
902 }
903 EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
904
lis3lv02d_8b_configure(struct lis3lv02d * lis3,struct lis3lv02d_platform_data * p)905 static void lis3lv02d_8b_configure(struct lis3lv02d *lis3,
906 struct lis3lv02d_platform_data *p)
907 {
908 int err;
909 int ctrl2 = p->hipass_ctrl;
910
911 if (p->click_flags) {
912 lis3->write(lis3, CLICK_CFG, p->click_flags);
913 lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit);
914 lis3->write(lis3, CLICK_LATENCY, p->click_latency);
915 lis3->write(lis3, CLICK_WINDOW, p->click_window);
916 lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf);
917 lis3->write(lis3, CLICK_THSY_X,
918 (p->click_thresh_x & 0xf) |
919 (p->click_thresh_y << 4));
920
921 if (lis3->idev) {
922 struct input_dev *input_dev = lis3->idev->input;
923 input_set_capability(input_dev, EV_KEY, BTN_X);
924 input_set_capability(input_dev, EV_KEY, BTN_Y);
925 input_set_capability(input_dev, EV_KEY, BTN_Z);
926 }
927 }
928
929 if (p->wakeup_flags) {
930 lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags);
931 lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
932 /* pdata value + 1 to keep this backward compatible*/
933 lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1);
934 ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/
935 }
936
937 if (p->wakeup_flags2) {
938 lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2);
939 lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f);
940 /* pdata value + 1 to keep this backward compatible*/
941 lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1);
942 ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/
943 }
944 /* Configure hipass filters */
945 lis3->write(lis3, CTRL_REG2, ctrl2);
946
947 if (p->irq2) {
948 err = request_threaded_irq(p->irq2,
949 NULL,
950 lis302dl_interrupt_thread2_8b,
951 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
952 (p->irq_flags2 & IRQF_TRIGGER_MASK),
953 DRIVER_NAME, lis3);
954 if (err < 0)
955 pr_err("No second IRQ. Limited functionality\n");
956 }
957 }
958
959 #ifdef CONFIG_OF
lis3lv02d_init_dt(struct lis3lv02d * lis3)960 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
961 {
962 struct lis3lv02d_platform_data *pdata;
963 struct device_node *np = lis3->of_node;
964 u32 val;
965 s32 sval;
966
967 if (!lis3->of_node)
968 return 0;
969
970 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
971 if (!pdata)
972 return -ENOMEM;
973
974 if (of_get_property(np, "st,click-single-x", NULL))
975 pdata->click_flags |= LIS3_CLICK_SINGLE_X;
976 if (of_get_property(np, "st,click-double-x", NULL))
977 pdata->click_flags |= LIS3_CLICK_DOUBLE_X;
978
979 if (of_get_property(np, "st,click-single-y", NULL))
980 pdata->click_flags |= LIS3_CLICK_SINGLE_Y;
981 if (of_get_property(np, "st,click-double-y", NULL))
982 pdata->click_flags |= LIS3_CLICK_DOUBLE_Y;
983
984 if (of_get_property(np, "st,click-single-z", NULL))
985 pdata->click_flags |= LIS3_CLICK_SINGLE_Z;
986 if (of_get_property(np, "st,click-double-z", NULL))
987 pdata->click_flags |= LIS3_CLICK_DOUBLE_Z;
988
989 if (!of_property_read_u32(np, "st,click-threshold-x", &val))
990 pdata->click_thresh_x = val;
991 if (!of_property_read_u32(np, "st,click-threshold-y", &val))
992 pdata->click_thresh_y = val;
993 if (!of_property_read_u32(np, "st,click-threshold-z", &val))
994 pdata->click_thresh_z = val;
995
996 if (!of_property_read_u32(np, "st,click-time-limit", &val))
997 pdata->click_time_limit = val;
998 if (!of_property_read_u32(np, "st,click-latency", &val))
999 pdata->click_latency = val;
1000 if (!of_property_read_u32(np, "st,click-window", &val))
1001 pdata->click_window = val;
1002
1003 if (of_get_property(np, "st,irq1-disable", NULL))
1004 pdata->irq_cfg |= LIS3_IRQ1_DISABLE;
1005 if (of_get_property(np, "st,irq1-ff-wu-1", NULL))
1006 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1;
1007 if (of_get_property(np, "st,irq1-ff-wu-2", NULL))
1008 pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2;
1009 if (of_get_property(np, "st,irq1-data-ready", NULL))
1010 pdata->irq_cfg |= LIS3_IRQ1_DATA_READY;
1011 if (of_get_property(np, "st,irq1-click", NULL))
1012 pdata->irq_cfg |= LIS3_IRQ1_CLICK;
1013
1014 if (of_get_property(np, "st,irq2-disable", NULL))
1015 pdata->irq_cfg |= LIS3_IRQ2_DISABLE;
1016 if (of_get_property(np, "st,irq2-ff-wu-1", NULL))
1017 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1;
1018 if (of_get_property(np, "st,irq2-ff-wu-2", NULL))
1019 pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2;
1020 if (of_get_property(np, "st,irq2-data-ready", NULL))
1021 pdata->irq_cfg |= LIS3_IRQ2_DATA_READY;
1022 if (of_get_property(np, "st,irq2-click", NULL))
1023 pdata->irq_cfg |= LIS3_IRQ2_CLICK;
1024
1025 if (of_get_property(np, "st,irq-open-drain", NULL))
1026 pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN;
1027 if (of_get_property(np, "st,irq-active-low", NULL))
1028 pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW;
1029
1030 if (!of_property_read_u32(np, "st,wu-duration-1", &val))
1031 pdata->duration1 = val;
1032 if (!of_property_read_u32(np, "st,wu-duration-2", &val))
1033 pdata->duration2 = val;
1034
1035 if (of_get_property(np, "st,wakeup-x-lo", NULL))
1036 pdata->wakeup_flags |= LIS3_WAKEUP_X_LO;
1037 if (of_get_property(np, "st,wakeup-x-hi", NULL))
1038 pdata->wakeup_flags |= LIS3_WAKEUP_X_HI;
1039 if (of_get_property(np, "st,wakeup-y-lo", NULL))
1040 pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO;
1041 if (of_get_property(np, "st,wakeup-y-hi", NULL))
1042 pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI;
1043 if (of_get_property(np, "st,wakeup-z-lo", NULL))
1044 pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO;
1045 if (of_get_property(np, "st,wakeup-z-hi", NULL))
1046 pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI;
1047 if (of_get_property(np, "st,wakeup-threshold", &val))
1048 pdata->wakeup_thresh = val;
1049
1050 if (of_get_property(np, "st,wakeup2-x-lo", NULL))
1051 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO;
1052 if (of_get_property(np, "st,wakeup2-x-hi", NULL))
1053 pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI;
1054 if (of_get_property(np, "st,wakeup2-y-lo", NULL))
1055 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO;
1056 if (of_get_property(np, "st,wakeup2-y-hi", NULL))
1057 pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI;
1058 if (of_get_property(np, "st,wakeup2-z-lo", NULL))
1059 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO;
1060 if (of_get_property(np, "st,wakeup2-z-hi", NULL))
1061 pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI;
1062 if (of_get_property(np, "st,wakeup2-threshold", &val))
1063 pdata->wakeup_thresh2 = val;
1064
1065 if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) {
1066 switch (val) {
1067 case 1:
1068 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ;
1069 break;
1070 case 2:
1071 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ;
1072 break;
1073 case 4:
1074 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ;
1075 break;
1076 case 8:
1077 pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ;
1078 break;
1079 }
1080 }
1081
1082 if (of_get_property(np, "st,hipass1-disable", NULL))
1083 pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE;
1084 if (of_get_property(np, "st,hipass2-disable", NULL))
1085 pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE;
1086
1087 if (of_property_read_s32(np, "st,axis-x", &sval) == 0)
1088 pdata->axis_x = sval;
1089 if (of_property_read_s32(np, "st,axis-y", &sval) == 0)
1090 pdata->axis_y = sval;
1091 if (of_property_read_s32(np, "st,axis-z", &sval) == 0)
1092 pdata->axis_z = sval;
1093
1094 if (of_get_property(np, "st,default-rate", NULL))
1095 pdata->default_rate = val;
1096
1097 if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0)
1098 pdata->st_min_limits[0] = sval;
1099 if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0)
1100 pdata->st_min_limits[1] = sval;
1101 if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0)
1102 pdata->st_min_limits[2] = sval;
1103
1104 if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0)
1105 pdata->st_max_limits[0] = sval;
1106 if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0)
1107 pdata->st_max_limits[1] = sval;
1108 if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0)
1109 pdata->st_max_limits[2] = sval;
1110
1111
1112 lis3->pdata = pdata;
1113
1114 return 0;
1115 }
1116
1117 #else
lis3lv02d_init_dt(struct lis3lv02d * lis3)1118 int lis3lv02d_init_dt(struct lis3lv02d *lis3)
1119 {
1120 return 0;
1121 }
1122 #endif
1123 EXPORT_SYMBOL_GPL(lis3lv02d_init_dt);
1124
1125 /*
1126 * Initialise the accelerometer and the various subsystems.
1127 * Should be rather independent of the bus system.
1128 */
lis3lv02d_init_device(struct lis3lv02d * lis3)1129 int lis3lv02d_init_device(struct lis3lv02d *lis3)
1130 {
1131 int err;
1132 irq_handler_t thread_fn;
1133 int irq_flags = 0;
1134
1135 lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I);
1136
1137 switch (lis3->whoami) {
1138 case WAI_12B:
1139 pr_info("12 bits sensor found\n");
1140 lis3->read_data = lis3lv02d_read_12;
1141 lis3->mdps_max_val = 2048;
1142 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
1143 lis3->odrs = lis3_12_rates;
1144 lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1;
1145 lis3->scale = LIS3_SENSITIVITY_12B;
1146 lis3->regs = lis3_wai12_regs;
1147 lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs);
1148 break;
1149 case WAI_8B:
1150 pr_info("8 bits sensor found\n");
1151 lis3->read_data = lis3lv02d_read_8;
1152 lis3->mdps_max_val = 128;
1153 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1154 lis3->odrs = lis3_8_rates;
1155 lis3->odr_mask = CTRL1_DR;
1156 lis3->scale = LIS3_SENSITIVITY_8B;
1157 lis3->regs = lis3_wai8_regs;
1158 lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs);
1159 break;
1160 case WAI_3DC:
1161 pr_info("8 bits 3DC sensor found\n");
1162 lis3->read_data = lis3lv02d_read_8;
1163 lis3->mdps_max_val = 128;
1164 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1165 lis3->odrs = lis3_3dc_rates;
1166 lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3;
1167 lis3->scale = LIS3_SENSITIVITY_8B;
1168 break;
1169 case WAI_3DLH:
1170 pr_info("16 bits lis331dlh sensor found\n");
1171 lis3->read_data = lis331dlh_read_data;
1172 lis3->mdps_max_val = 2048; /* 12 bits for 2G */
1173 lis3->shift_adj = SHIFT_ADJ_2G;
1174 lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
1175 lis3->odrs = lis3_3dlh_rates;
1176 lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1;
1177 lis3->scale = LIS3DLH_SENSITIVITY_2G;
1178 break;
1179 default:
1180 pr_err("unknown sensor type 0x%X\n", lis3->whoami);
1181 return -EINVAL;
1182 }
1183
1184 lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs),
1185 sizeof(lis3_wai12_regs)), GFP_KERNEL);
1186
1187 if (lis3->reg_cache == NULL) {
1188 printk(KERN_ERR DRIVER_NAME "out of memory\n");
1189 return -ENOMEM;
1190 }
1191
1192 mutex_init(&lis3->mutex);
1193 atomic_set(&lis3->wake_thread, 0);
1194
1195 lis3lv02d_add_fs(lis3);
1196 err = lis3lv02d_poweron(lis3);
1197 if (err) {
1198 lis3lv02d_remove_fs(lis3);
1199 return err;
1200 }
1201
1202 if (lis3->pm_dev) {
1203 pm_runtime_set_active(lis3->pm_dev);
1204 pm_runtime_enable(lis3->pm_dev);
1205 }
1206
1207 if (lis3lv02d_joystick_enable(lis3))
1208 pr_err("joystick initialization failed\n");
1209
1210 /* passing in platform specific data is purely optional and only
1211 * used by the SPI transport layer at the moment */
1212 if (lis3->pdata) {
1213 struct lis3lv02d_platform_data *p = lis3->pdata;
1214
1215 if (lis3->whoami == WAI_8B)
1216 lis3lv02d_8b_configure(lis3, p);
1217
1218 irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK;
1219
1220 lis3->irq_cfg = p->irq_cfg;
1221 if (p->irq_cfg)
1222 lis3->write(lis3, CTRL_REG3, p->irq_cfg);
1223
1224 if (p->default_rate)
1225 lis3lv02d_set_odr(lis3, p->default_rate);
1226 }
1227
1228 /* bail if we did not get an IRQ from the bus layer */
1229 if (!lis3->irq) {
1230 pr_debug("No IRQ. Disabling /dev/freefall\n");
1231 goto out;
1232 }
1233
1234 /*
1235 * The sensor can generate interrupts for free-fall and direction
1236 * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep
1237 * the things simple and _fast_ we activate it only for free-fall, so
1238 * no need to read register (very slow with ACPI). For the same reason,
1239 * we forbid shared interrupts.
1240 *
1241 * IRQF_TRIGGER_RISING seems pointless on HP laptops because the
1242 * io-apic is not configurable (and generates a warning) but I keep it
1243 * in case of support for other hardware.
1244 */
1245 if (lis3->pdata && lis3->whoami == WAI_8B)
1246 thread_fn = lis302dl_interrupt_thread1_8b;
1247 else
1248 thread_fn = NULL;
1249
1250 err = request_threaded_irq(lis3->irq, lis302dl_interrupt,
1251 thread_fn,
1252 IRQF_TRIGGER_RISING | IRQF_ONESHOT |
1253 irq_flags,
1254 DRIVER_NAME, lis3);
1255
1256 if (err < 0) {
1257 pr_err("Cannot get IRQ\n");
1258 goto out;
1259 }
1260
1261 lis3->miscdev.minor = MISC_DYNAMIC_MINOR;
1262 lis3->miscdev.name = "freefall";
1263 lis3->miscdev.fops = &lis3lv02d_misc_fops;
1264
1265 if (misc_register(&lis3->miscdev))
1266 pr_err("misc_register failed\n");
1267 out:
1268 return 0;
1269 }
1270 EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
1271
1272 MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
1273 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
1274 MODULE_LICENSE("GPL");
1275