1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * lis3lv02d.c - ST LIS3LV02DL accelerometer driver |
4 | * |
5 | * Copyright (C) 2007-2008 Yan Burman |
6 | * Copyright (C) 2008 Eric Piel |
7 | * Copyright (C) 2008-2009 Pavel Machek |
8 | */ |
9 | |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | |
12 | #include <linux/kernel.h> |
13 | #include <linux/sched/signal.h> |
14 | #include <linux/dmi.h> |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/interrupt.h> |
19 | #include <linux/input.h> |
20 | #include <linux/delay.h> |
21 | #include <linux/wait.h> |
22 | #include <linux/poll.h> |
23 | #include <linux/slab.h> |
24 | #include <linux/freezer.h> |
25 | #include <linux/uaccess.h> |
26 | #include <linux/miscdevice.h> |
27 | #include <linux/pm_runtime.h> |
28 | #include <linux/atomic.h> |
29 | #include <linux/of.h> |
30 | #include "lis3lv02d.h" |
31 | |
32 | #define DRIVER_NAME "lis3lv02d" |
33 | |
34 | /* joystick device poll interval in milliseconds */ |
35 | #define MDPS_POLL_INTERVAL 50 |
36 | #define MDPS_POLL_MIN 0 |
37 | #define MDPS_POLL_MAX 2000 |
38 | |
39 | #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */ |
40 | |
41 | #define SELFTEST_OK 0 |
42 | #define SELFTEST_FAIL -1 |
43 | #define SELFTEST_IRQ -2 |
44 | |
45 | #define IRQ_LINE0 0 |
46 | #define IRQ_LINE1 1 |
47 | |
48 | /* |
49 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless |
50 | * because they are generated even if the data do not change. So it's better |
51 | * to keep the interrupt for the free-fall event. The values are updated at |
52 | * 40Hz (at the lowest frequency), but as it can be pretty time consuming on |
53 | * some low processor, we poll the sensor only at 20Hz... enough for the |
54 | * joystick. |
55 | */ |
56 | |
57 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
58 | #define LIS3_PWRON_DELAY_WAI_8B (3000) |
59 | |
60 | /* |
61 | * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG |
62 | * LIS302D spec says: 18 mG / digit |
63 | * LIS3_ACCURACY is used to increase accuracy of the intermediate |
64 | * calculation results. |
65 | */ |
66 | #define LIS3_ACCURACY 1024 |
67 | /* Sensitivity values for -2G +2G scale */ |
68 | #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) |
69 | #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) |
70 | |
71 | /* |
72 | * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG. |
73 | * Below macros defines sensitivity values for +/-2G. Dataout bits for |
74 | * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit |
75 | * data from 16bit value. Currently this driver supports only 2G range. |
76 | */ |
77 | #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024) |
78 | #define SHIFT_ADJ_2G 4 |
79 | |
80 | #define LIS3_DEFAULT_FUZZ_12B 3 |
81 | #define LIS3_DEFAULT_FLAT_12B 3 |
82 | #define LIS3_DEFAULT_FUZZ_8B 1 |
83 | #define LIS3_DEFAULT_FLAT_8B 1 |
84 | |
85 | struct lis3lv02d lis3_dev = { |
86 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
87 | }; |
88 | EXPORT_SYMBOL_GPL(lis3_dev); |
89 | |
90 | /* just like param_set_int() but does sanity-check so that it won't point |
91 | * over the axis array size |
92 | */ |
93 | static int param_set_axis(const char *val, const struct kernel_param *kp) |
94 | { |
95 | int ret = param_set_int(val, kp); |
96 | if (!ret) { |
97 | int val = *(int *)kp->arg; |
98 | if (val < 0) |
99 | val = -val; |
100 | if (!val || val > 3) |
101 | return -EINVAL; |
102 | } |
103 | return ret; |
104 | } |
105 | |
106 | static const struct kernel_param_ops param_ops_axis = { |
107 | .set = param_set_axis, |
108 | .get = param_get_int, |
109 | }; |
110 | |
111 | #define param_check_axis(name, p) param_check_int(name, p) |
112 | |
113 | module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644); |
114 | MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions" ); |
115 | |
116 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
117 | { |
118 | s8 lo; |
119 | if (lis3->read(lis3, reg, &lo) < 0) |
120 | return 0; |
121 | |
122 | return lo; |
123 | } |
124 | |
125 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
126 | { |
127 | u8 lo, hi; |
128 | |
129 | lis3->read(lis3, reg - 1, &lo); |
130 | lis3->read(lis3, reg, &hi); |
131 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
132 | return (s16)((hi << 8) | lo); |
133 | } |
134 | |
135 | /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */ |
136 | static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg) |
137 | { |
138 | u8 lo, hi; |
139 | int v; |
140 | |
141 | lis3->read(lis3, reg - 1, &lo); |
142 | lis3->read(lis3, reg, &hi); |
143 | v = (int) ((hi << 8) | lo); |
144 | |
145 | return (s16) v >> lis3->shift_adj; |
146 | } |
147 | |
148 | /** |
149 | * lis3lv02d_get_axis - For the given axis, give the value converted |
150 | * @axis: 1,2,3 - can also be negative |
151 | * @hw_values: raw values returned by the hardware |
152 | * |
153 | * Returns the converted value. |
154 | */ |
155 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) |
156 | { |
157 | if (axis > 0) |
158 | return hw_values[axis - 1]; |
159 | else |
160 | return -hw_values[-axis - 1]; |
161 | } |
162 | |
163 | /** |
164 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer |
165 | * @lis3: pointer to the device struct |
166 | * @x: where to store the X axis value |
167 | * @y: where to store the Y axis value |
168 | * @z: where to store the Z axis value |
169 | * |
170 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ |
171 | */ |
172 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
173 | { |
174 | int position[3]; |
175 | int i; |
176 | |
177 | if (lis3->blkread) { |
178 | if (lis3->whoami == WAI_12B) { |
179 | u16 data[3]; |
180 | lis3->blkread(lis3, OUTX_L, 6, (u8 *)data); |
181 | for (i = 0; i < 3; i++) |
182 | position[i] = (s16)le16_to_cpu(data[i]); |
183 | } else { |
184 | u8 data[5]; |
185 | /* Data: x, dummy, y, dummy, z */ |
186 | lis3->blkread(lis3, OUTX, 5, data); |
187 | for (i = 0; i < 3; i++) |
188 | position[i] = (s8)data[i * 2]; |
189 | } |
190 | } else { |
191 | position[0] = lis3->read_data(lis3, OUTX); |
192 | position[1] = lis3->read_data(lis3, OUTY); |
193 | position[2] = lis3->read_data(lis3, OUTZ); |
194 | } |
195 | |
196 | for (i = 0; i < 3; i++) |
197 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; |
198 | |
199 | *x = lis3lv02d_get_axis(axis: lis3->ac.x, hw_values: position); |
200 | *y = lis3lv02d_get_axis(axis: lis3->ac.y, hw_values: position); |
201 | *z = lis3lv02d_get_axis(axis: lis3->ac.z, hw_values: position); |
202 | } |
203 | |
204 | /* conversion btw sampling rate and the register values */ |
205 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; |
206 | static int lis3_8_rates[2] = {100, 400}; |
207 | static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
208 | static int lis3_3dlh_rates[4] = {50, 100, 400, 1000}; |
209 | |
210 | /* ODR is Output Data Rate */ |
211 | static int lis3lv02d_get_odr_index(struct lis3lv02d *lis3) |
212 | { |
213 | u8 ctrl; |
214 | int shift; |
215 | |
216 | lis3->read(lis3, CTRL_REG1, &ctrl); |
217 | ctrl &= lis3->odr_mask; |
218 | shift = ffs(lis3->odr_mask) - 1; |
219 | return (ctrl >> shift); |
220 | } |
221 | |
222 | static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) |
223 | { |
224 | int odr_idx = lis3lv02d_get_odr_index(lis3); |
225 | int div = lis3->odrs[odr_idx]; |
226 | |
227 | if (div == 0) { |
228 | if (odr_idx == 0) { |
229 | /* Power-down mode, not sampling no need to sleep */ |
230 | return 0; |
231 | } |
232 | |
233 | dev_err(&lis3->pdev->dev, "Error unknown odrs-index: %d\n" , odr_idx); |
234 | return -ENXIO; |
235 | } |
236 | |
237 | /* LIS3 power on delay is quite long */ |
238 | msleep(msecs: lis3->pwron_delay / div); |
239 | return 0; |
240 | } |
241 | |
242 | static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate) |
243 | { |
244 | u8 ctrl; |
245 | int i, len, shift; |
246 | |
247 | if (!rate) |
248 | return -EINVAL; |
249 | |
250 | lis3->read(lis3, CTRL_REG1, &ctrl); |
251 | ctrl &= ~lis3->odr_mask; |
252 | len = 1 << hweight_long(w: lis3->odr_mask); /* # of possible values */ |
253 | shift = ffs(lis3->odr_mask) - 1; |
254 | |
255 | for (i = 0; i < len; i++) |
256 | if (lis3->odrs[i] == rate) { |
257 | lis3->write(lis3, CTRL_REG1, |
258 | ctrl | (i << shift)); |
259 | return 0; |
260 | } |
261 | return -EINVAL; |
262 | } |
263 | |
264 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
265 | { |
266 | u8 ctlreg, reg; |
267 | s16 x, y, z; |
268 | u8 selftest; |
269 | int ret; |
270 | u8 ctrl_reg_data; |
271 | unsigned char irq_cfg; |
272 | |
273 | mutex_lock(&lis3->mutex); |
274 | |
275 | irq_cfg = lis3->irq_cfg; |
276 | if (lis3->whoami == WAI_8B) { |
277 | lis3->data_ready_count[IRQ_LINE0] = 0; |
278 | lis3->data_ready_count[IRQ_LINE1] = 0; |
279 | |
280 | /* Change interrupt cfg to data ready for selftest */ |
281 | atomic_inc(v: &lis3->wake_thread); |
282 | lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; |
283 | lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); |
284 | lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & |
285 | ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | |
286 | (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); |
287 | } |
288 | |
289 | if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) { |
290 | ctlreg = CTRL_REG4; |
291 | selftest = CTRL4_ST0; |
292 | } else { |
293 | ctlreg = CTRL_REG1; |
294 | if (lis3->whoami == WAI_12B) |
295 | selftest = CTRL1_ST; |
296 | else |
297 | selftest = CTRL1_STP; |
298 | } |
299 | |
300 | lis3->read(lis3, ctlreg, ®); |
301 | lis3->write(lis3, ctlreg, (reg | selftest)); |
302 | ret = lis3lv02d_get_pwron_wait(lis3); |
303 | if (ret) |
304 | goto fail; |
305 | |
306 | /* Read directly to avoid axis remap */ |
307 | x = lis3->read_data(lis3, OUTX); |
308 | y = lis3->read_data(lis3, OUTY); |
309 | z = lis3->read_data(lis3, OUTZ); |
310 | |
311 | /* back to normal settings */ |
312 | lis3->write(lis3, ctlreg, reg); |
313 | ret = lis3lv02d_get_pwron_wait(lis3); |
314 | if (ret) |
315 | goto fail; |
316 | |
317 | results[0] = x - lis3->read_data(lis3, OUTX); |
318 | results[1] = y - lis3->read_data(lis3, OUTY); |
319 | results[2] = z - lis3->read_data(lis3, OUTZ); |
320 | |
321 | ret = 0; |
322 | |
323 | if (lis3->whoami == WAI_8B) { |
324 | /* Restore original interrupt configuration */ |
325 | atomic_dec(v: &lis3->wake_thread); |
326 | lis3->write(lis3, CTRL_REG3, ctrl_reg_data); |
327 | lis3->irq_cfg = irq_cfg; |
328 | |
329 | if ((irq_cfg & LIS3_IRQ1_MASK) && |
330 | lis3->data_ready_count[IRQ_LINE0] < 2) { |
331 | ret = SELFTEST_IRQ; |
332 | goto fail; |
333 | } |
334 | |
335 | if ((irq_cfg & LIS3_IRQ2_MASK) && |
336 | lis3->data_ready_count[IRQ_LINE1] < 2) { |
337 | ret = SELFTEST_IRQ; |
338 | goto fail; |
339 | } |
340 | } |
341 | |
342 | if (lis3->pdata) { |
343 | int i; |
344 | for (i = 0; i < 3; i++) { |
345 | /* Check against selftest acceptance limits */ |
346 | if ((results[i] < lis3->pdata->st_min_limits[i]) || |
347 | (results[i] > lis3->pdata->st_max_limits[i])) { |
348 | ret = SELFTEST_FAIL; |
349 | goto fail; |
350 | } |
351 | } |
352 | } |
353 | |
354 | /* test passed */ |
355 | fail: |
356 | mutex_unlock(lock: &lis3->mutex); |
357 | return ret; |
358 | } |
359 | |
360 | /* |
361 | * Order of registers in the list affects to order of the restore process. |
362 | * Perhaps it is a good idea to set interrupt enable register as a last one |
363 | * after all other configurations |
364 | */ |
365 | static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, |
366 | FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, |
367 | CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, |
368 | CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, |
369 | CTRL_REG1, CTRL_REG2, CTRL_REG3}; |
370 | |
371 | static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, |
372 | FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, |
373 | DD_THSE_L, DD_THSE_H, |
374 | CTRL_REG1, CTRL_REG3, CTRL_REG2}; |
375 | |
376 | static inline void lis3_context_save(struct lis3lv02d *lis3) |
377 | { |
378 | int i; |
379 | for (i = 0; i < lis3->regs_size; i++) |
380 | lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); |
381 | lis3->regs_stored = true; |
382 | } |
383 | |
384 | static inline void lis3_context_restore(struct lis3lv02d *lis3) |
385 | { |
386 | int i; |
387 | if (lis3->regs_stored) |
388 | for (i = 0; i < lis3->regs_size; i++) |
389 | lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); |
390 | } |
391 | |
392 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
393 | { |
394 | if (lis3->reg_ctrl) |
395 | lis3_context_save(lis3); |
396 | /* disable X,Y,Z axis and power down */ |
397 | lis3->write(lis3, CTRL_REG1, 0x00); |
398 | if (lis3->reg_ctrl) |
399 | lis3->reg_ctrl(lis3, LIS3_REG_OFF); |
400 | } |
401 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
402 | |
403 | int lis3lv02d_poweron(struct lis3lv02d *lis3) |
404 | { |
405 | int err; |
406 | u8 reg; |
407 | |
408 | lis3->init(lis3); |
409 | |
410 | /* |
411 | * Common configuration |
412 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
413 | * both have been read. So the value read will always be correct. |
414 | * Set BOOT bit to refresh factory tuning values. |
415 | */ |
416 | if (lis3->pdata) { |
417 | lis3->read(lis3, CTRL_REG2, ®); |
418 | if (lis3->whoami == WAI_12B) |
419 | reg |= CTRL2_BDU | CTRL2_BOOT; |
420 | else if (lis3->whoami == WAI_3DLH) |
421 | reg |= CTRL2_BOOT_3DLH; |
422 | else |
423 | reg |= CTRL2_BOOT_8B; |
424 | lis3->write(lis3, CTRL_REG2, reg); |
425 | |
426 | if (lis3->whoami == WAI_3DLH) { |
427 | lis3->read(lis3, CTRL_REG4, ®); |
428 | reg |= CTRL4_BDU; |
429 | lis3->write(lis3, CTRL_REG4, reg); |
430 | } |
431 | } |
432 | |
433 | err = lis3lv02d_get_pwron_wait(lis3); |
434 | if (err) |
435 | return err; |
436 | |
437 | if (lis3->reg_ctrl) |
438 | lis3_context_restore(lis3); |
439 | |
440 | return 0; |
441 | } |
442 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
443 | |
444 | |
445 | static void lis3lv02d_joystick_poll(struct input_dev *input) |
446 | { |
447 | struct lis3lv02d *lis3 = input_get_drvdata(dev: input); |
448 | int x, y, z; |
449 | |
450 | mutex_lock(&lis3->mutex); |
451 | lis3lv02d_get_xyz(lis3, x: &x, y: &y, z: &z); |
452 | input_report_abs(dev: input, ABS_X, value: x); |
453 | input_report_abs(dev: input, ABS_Y, value: y); |
454 | input_report_abs(dev: input, ABS_Z, value: z); |
455 | input_sync(dev: input); |
456 | mutex_unlock(lock: &lis3->mutex); |
457 | } |
458 | |
459 | static int lis3lv02d_joystick_open(struct input_dev *input) |
460 | { |
461 | struct lis3lv02d *lis3 = input_get_drvdata(dev: input); |
462 | |
463 | if (lis3->pm_dev) |
464 | pm_runtime_get_sync(dev: lis3->pm_dev); |
465 | |
466 | if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev) |
467 | atomic_set(v: &lis3->wake_thread, i: 1); |
468 | /* |
469 | * Update coordinates for the case where poll interval is 0 and |
470 | * the chip in running purely under interrupt control |
471 | */ |
472 | lis3lv02d_joystick_poll(input); |
473 | |
474 | return 0; |
475 | } |
476 | |
477 | static void lis3lv02d_joystick_close(struct input_dev *input) |
478 | { |
479 | struct lis3lv02d *lis3 = input_get_drvdata(dev: input); |
480 | |
481 | atomic_set(v: &lis3->wake_thread, i: 0); |
482 | if (lis3->pm_dev) |
483 | pm_runtime_put(dev: lis3->pm_dev); |
484 | } |
485 | |
486 | static irqreturn_t lis302dl_interrupt(int irq, void *data) |
487 | { |
488 | struct lis3lv02d *lis3 = data; |
489 | |
490 | if (!test_bit(0, &lis3->misc_opened)) |
491 | goto out; |
492 | |
493 | /* |
494 | * Be careful: on some HP laptops the bios force DD when on battery and |
495 | * the lid is closed. This leads to interrupts as soon as a little move |
496 | * is done. |
497 | */ |
498 | atomic_inc(v: &lis3->count); |
499 | |
500 | wake_up_interruptible(&lis3->misc_wait); |
501 | kill_fasync(&lis3->async_queue, SIGIO, POLL_IN); |
502 | out: |
503 | if (atomic_read(v: &lis3->wake_thread)) |
504 | return IRQ_WAKE_THREAD; |
505 | return IRQ_HANDLED; |
506 | } |
507 | |
508 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
509 | { |
510 | struct input_dev *dev = lis3->idev; |
511 | u8 click_src; |
512 | |
513 | mutex_lock(&lis3->mutex); |
514 | lis3->read(lis3, CLICK_SRC, &click_src); |
515 | |
516 | if (click_src & CLICK_SINGLE_X) { |
517 | input_report_key(dev, code: lis3->mapped_btns[0], value: 1); |
518 | input_report_key(dev, code: lis3->mapped_btns[0], value: 0); |
519 | } |
520 | |
521 | if (click_src & CLICK_SINGLE_Y) { |
522 | input_report_key(dev, code: lis3->mapped_btns[1], value: 1); |
523 | input_report_key(dev, code: lis3->mapped_btns[1], value: 0); |
524 | } |
525 | |
526 | if (click_src & CLICK_SINGLE_Z) { |
527 | input_report_key(dev, code: lis3->mapped_btns[2], value: 1); |
528 | input_report_key(dev, code: lis3->mapped_btns[2], value: 0); |
529 | } |
530 | input_sync(dev); |
531 | mutex_unlock(lock: &lis3->mutex); |
532 | } |
533 | |
534 | static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
535 | { |
536 | int dummy; |
537 | |
538 | /* Dummy read to ack interrupt */ |
539 | lis3lv02d_get_xyz(lis3, x: &dummy, y: &dummy, z: &dummy); |
540 | lis3->data_ready_count[index]++; |
541 | } |
542 | |
543 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
544 | { |
545 | struct lis3lv02d *lis3 = data; |
546 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
547 | |
548 | if (irq_cfg == LIS3_IRQ1_CLICK) |
549 | lis302dl_interrupt_handle_click(lis3); |
550 | else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
551 | lis302dl_data_ready(lis3, IRQ_LINE0); |
552 | else |
553 | lis3lv02d_joystick_poll(input: lis3->idev); |
554 | |
555 | return IRQ_HANDLED; |
556 | } |
557 | |
558 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
559 | { |
560 | struct lis3lv02d *lis3 = data; |
561 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
562 | |
563 | if (irq_cfg == LIS3_IRQ2_CLICK) |
564 | lis302dl_interrupt_handle_click(lis3); |
565 | else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
566 | lis302dl_data_ready(lis3, IRQ_LINE1); |
567 | else |
568 | lis3lv02d_joystick_poll(input: lis3->idev); |
569 | |
570 | return IRQ_HANDLED; |
571 | } |
572 | |
573 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) |
574 | { |
575 | struct lis3lv02d *lis3 = container_of(file->private_data, |
576 | struct lis3lv02d, miscdev); |
577 | |
578 | if (test_and_set_bit(nr: 0, addr: &lis3->misc_opened)) |
579 | return -EBUSY; /* already open */ |
580 | |
581 | if (lis3->pm_dev) |
582 | pm_runtime_get_sync(dev: lis3->pm_dev); |
583 | |
584 | atomic_set(v: &lis3->count, i: 0); |
585 | return 0; |
586 | } |
587 | |
588 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) |
589 | { |
590 | struct lis3lv02d *lis3 = container_of(file->private_data, |
591 | struct lis3lv02d, miscdev); |
592 | |
593 | clear_bit(nr: 0, addr: &lis3->misc_opened); /* release the device */ |
594 | if (lis3->pm_dev) |
595 | pm_runtime_put(dev: lis3->pm_dev); |
596 | return 0; |
597 | } |
598 | |
599 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, |
600 | size_t count, loff_t *pos) |
601 | { |
602 | struct lis3lv02d *lis3 = container_of(file->private_data, |
603 | struct lis3lv02d, miscdev); |
604 | |
605 | DECLARE_WAITQUEUE(wait, current); |
606 | u32 data; |
607 | unsigned char byte_data; |
608 | ssize_t retval = 1; |
609 | |
610 | if (count < 1) |
611 | return -EINVAL; |
612 | |
613 | add_wait_queue(wq_head: &lis3->misc_wait, wq_entry: &wait); |
614 | while (true) { |
615 | set_current_state(TASK_INTERRUPTIBLE); |
616 | data = atomic_xchg(v: &lis3->count, new: 0); |
617 | if (data) |
618 | break; |
619 | |
620 | if (file->f_flags & O_NONBLOCK) { |
621 | retval = -EAGAIN; |
622 | goto out; |
623 | } |
624 | |
625 | if (signal_pending(current)) { |
626 | retval = -ERESTARTSYS; |
627 | goto out; |
628 | } |
629 | |
630 | schedule(); |
631 | } |
632 | |
633 | if (data < 255) |
634 | byte_data = data; |
635 | else |
636 | byte_data = 255; |
637 | |
638 | /* make sure we are not going into copy_to_user() with |
639 | * TASK_INTERRUPTIBLE state */ |
640 | set_current_state(TASK_RUNNING); |
641 | if (copy_to_user(to: buf, from: &byte_data, n: sizeof(byte_data))) |
642 | retval = -EFAULT; |
643 | |
644 | out: |
645 | __set_current_state(TASK_RUNNING); |
646 | remove_wait_queue(wq_head: &lis3->misc_wait, wq_entry: &wait); |
647 | |
648 | return retval; |
649 | } |
650 | |
651 | static __poll_t lis3lv02d_misc_poll(struct file *file, poll_table *wait) |
652 | { |
653 | struct lis3lv02d *lis3 = container_of(file->private_data, |
654 | struct lis3lv02d, miscdev); |
655 | |
656 | poll_wait(filp: file, wait_address: &lis3->misc_wait, p: wait); |
657 | if (atomic_read(v: &lis3->count)) |
658 | return EPOLLIN | EPOLLRDNORM; |
659 | return 0; |
660 | } |
661 | |
662 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) |
663 | { |
664 | struct lis3lv02d *lis3 = container_of(file->private_data, |
665 | struct lis3lv02d, miscdev); |
666 | |
667 | return fasync_helper(fd, file, on, &lis3->async_queue); |
668 | } |
669 | |
670 | static const struct file_operations lis3lv02d_misc_fops = { |
671 | .owner = THIS_MODULE, |
672 | .llseek = no_llseek, |
673 | .read = lis3lv02d_misc_read, |
674 | .open = lis3lv02d_misc_open, |
675 | .release = lis3lv02d_misc_release, |
676 | .poll = lis3lv02d_misc_poll, |
677 | .fasync = lis3lv02d_misc_fasync, |
678 | }; |
679 | |
680 | int lis3lv02d_joystick_enable(struct lis3lv02d *lis3) |
681 | { |
682 | struct input_dev *input_dev; |
683 | int err; |
684 | int max_val, fuzz, flat; |
685 | int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
686 | |
687 | if (lis3->idev) |
688 | return -EINVAL; |
689 | |
690 | input_dev = input_allocate_device(); |
691 | if (!input_dev) |
692 | return -ENOMEM; |
693 | |
694 | input_dev->name = "ST LIS3LV02DL Accelerometer" ; |
695 | input_dev->phys = DRIVER_NAME "/input0" ; |
696 | input_dev->id.bustype = BUS_HOST; |
697 | input_dev->id.vendor = 0; |
698 | input_dev->dev.parent = &lis3->pdev->dev; |
699 | |
700 | input_dev->open = lis3lv02d_joystick_open; |
701 | input_dev->close = lis3lv02d_joystick_close; |
702 | |
703 | max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY; |
704 | if (lis3->whoami == WAI_12B) { |
705 | fuzz = LIS3_DEFAULT_FUZZ_12B; |
706 | flat = LIS3_DEFAULT_FLAT_12B; |
707 | } else { |
708 | fuzz = LIS3_DEFAULT_FUZZ_8B; |
709 | flat = LIS3_DEFAULT_FLAT_8B; |
710 | } |
711 | fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY; |
712 | flat = (flat * lis3->scale) / LIS3_ACCURACY; |
713 | |
714 | input_set_abs_params(dev: input_dev, ABS_X, min: -max_val, max: max_val, fuzz, flat); |
715 | input_set_abs_params(dev: input_dev, ABS_Y, min: -max_val, max: max_val, fuzz, flat); |
716 | input_set_abs_params(dev: input_dev, ABS_Z, min: -max_val, max: max_val, fuzz, flat); |
717 | |
718 | input_set_drvdata(dev: input_dev, data: lis3); |
719 | lis3->idev = input_dev; |
720 | |
721 | err = input_setup_polling(dev: input_dev, poll_fn: lis3lv02d_joystick_poll); |
722 | if (err) |
723 | goto err_free_input; |
724 | |
725 | input_set_poll_interval(dev: input_dev, MDPS_POLL_INTERVAL); |
726 | input_set_min_poll_interval(dev: input_dev, MDPS_POLL_MIN); |
727 | input_set_max_poll_interval(dev: input_dev, MDPS_POLL_MAX); |
728 | |
729 | lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), hw_values: btns); |
730 | lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), hw_values: btns); |
731 | lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), hw_values: btns); |
732 | |
733 | err = input_register_device(lis3->idev); |
734 | if (err) |
735 | goto err_free_input; |
736 | |
737 | return 0; |
738 | |
739 | err_free_input: |
740 | input_free_device(dev: input_dev); |
741 | lis3->idev = NULL; |
742 | return err; |
743 | |
744 | } |
745 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
746 | |
747 | void lis3lv02d_joystick_disable(struct lis3lv02d *lis3) |
748 | { |
749 | if (lis3->irq) |
750 | free_irq(lis3->irq, lis3); |
751 | if (lis3->pdata && lis3->pdata->irq2) |
752 | free_irq(lis3->pdata->irq2, lis3); |
753 | |
754 | if (!lis3->idev) |
755 | return; |
756 | |
757 | if (lis3->irq) |
758 | misc_deregister(misc: &lis3->miscdev); |
759 | input_unregister_device(lis3->idev); |
760 | lis3->idev = NULL; |
761 | } |
762 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
763 | |
764 | /* Sysfs stuff */ |
765 | static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3) |
766 | { |
767 | /* |
768 | * SYSFS functions are fast visitors so put-call |
769 | * immediately after the get-call. However, keep |
770 | * chip running for a while and schedule delayed |
771 | * suspend. This way periodic sysfs calls doesn't |
772 | * suffer from relatively long power up time. |
773 | */ |
774 | |
775 | if (lis3->pm_dev) { |
776 | pm_runtime_get_sync(dev: lis3->pm_dev); |
777 | pm_runtime_put_noidle(dev: lis3->pm_dev); |
778 | pm_schedule_suspend(dev: lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY); |
779 | } |
780 | } |
781 | |
782 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
783 | struct device_attribute *attr, char *buf) |
784 | { |
785 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
786 | s16 values[3]; |
787 | |
788 | static const char ok[] = "OK" ; |
789 | static const char fail[] = "FAIL" ; |
790 | static const char irq[] = "FAIL_IRQ" ; |
791 | const char *res; |
792 | |
793 | lis3lv02d_sysfs_poweron(lis3); |
794 | switch (lis3lv02d_selftest(lis3, results: values)) { |
795 | case SELFTEST_FAIL: |
796 | res = fail; |
797 | break; |
798 | case SELFTEST_IRQ: |
799 | res = irq; |
800 | break; |
801 | case SELFTEST_OK: |
802 | default: |
803 | res = ok; |
804 | break; |
805 | } |
806 | return sprintf(buf, fmt: "%s %d %d %d\n" , res, |
807 | values[0], values[1], values[2]); |
808 | } |
809 | |
810 | static ssize_t lis3lv02d_position_show(struct device *dev, |
811 | struct device_attribute *attr, char *buf) |
812 | { |
813 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
814 | int x, y, z; |
815 | |
816 | lis3lv02d_sysfs_poweron(lis3); |
817 | mutex_lock(&lis3->mutex); |
818 | lis3lv02d_get_xyz(lis3, x: &x, y: &y, z: &z); |
819 | mutex_unlock(lock: &lis3->mutex); |
820 | return sprintf(buf, fmt: "(%d,%d,%d)\n" , x, y, z); |
821 | } |
822 | |
823 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
824 | struct device_attribute *attr, char *buf) |
825 | { |
826 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
827 | int odr_idx; |
828 | |
829 | lis3lv02d_sysfs_poweron(lis3); |
830 | |
831 | odr_idx = lis3lv02d_get_odr_index(lis3); |
832 | return sprintf(buf, fmt: "%d\n" , lis3->odrs[odr_idx]); |
833 | } |
834 | |
835 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
836 | struct device_attribute *attr, const char *buf, |
837 | size_t count) |
838 | { |
839 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
840 | unsigned long rate; |
841 | int ret; |
842 | |
843 | ret = kstrtoul(s: buf, base: 0, res: &rate); |
844 | if (ret) |
845 | return ret; |
846 | |
847 | lis3lv02d_sysfs_poweron(lis3); |
848 | if (lis3lv02d_set_odr(lis3, rate)) |
849 | return -EINVAL; |
850 | |
851 | return count; |
852 | } |
853 | |
854 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
855 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
856 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
857 | lis3lv02d_rate_set); |
858 | |
859 | static struct attribute *lis3lv02d_attributes[] = { |
860 | &dev_attr_selftest.attr, |
861 | &dev_attr_position.attr, |
862 | &dev_attr_rate.attr, |
863 | NULL |
864 | }; |
865 | |
866 | static const struct attribute_group lis3lv02d_attribute_group = { |
867 | .attrs = lis3lv02d_attributes |
868 | }; |
869 | |
870 | |
871 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
872 | { |
873 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, id: -1, NULL, num: 0); |
874 | if (IS_ERR(ptr: lis3->pdev)) |
875 | return PTR_ERR(ptr: lis3->pdev); |
876 | |
877 | platform_set_drvdata(pdev: lis3->pdev, data: lis3); |
878 | return sysfs_create_group(kobj: &lis3->pdev->dev.kobj, grp: &lis3lv02d_attribute_group); |
879 | } |
880 | |
881 | void lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
882 | { |
883 | sysfs_remove_group(kobj: &lis3->pdev->dev.kobj, grp: &lis3lv02d_attribute_group); |
884 | platform_device_unregister(lis3->pdev); |
885 | if (lis3->pm_dev) { |
886 | /* Barrier after the sysfs remove */ |
887 | pm_runtime_barrier(dev: lis3->pm_dev); |
888 | |
889 | /* SYSFS may have left chip running. Turn off if necessary */ |
890 | if (!pm_runtime_suspended(dev: lis3->pm_dev)) |
891 | lis3lv02d_poweroff(lis3); |
892 | |
893 | pm_runtime_disable(dev: lis3->pm_dev); |
894 | pm_runtime_set_suspended(dev: lis3->pm_dev); |
895 | } |
896 | kfree(objp: lis3->reg_cache); |
897 | } |
898 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
899 | |
900 | static void lis3lv02d_8b_configure(struct lis3lv02d *lis3, |
901 | struct lis3lv02d_platform_data *p) |
902 | { |
903 | int err; |
904 | int ctrl2 = p->hipass_ctrl; |
905 | |
906 | if (p->click_flags) { |
907 | lis3->write(lis3, CLICK_CFG, p->click_flags); |
908 | lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit); |
909 | lis3->write(lis3, CLICK_LATENCY, p->click_latency); |
910 | lis3->write(lis3, CLICK_WINDOW, p->click_window); |
911 | lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf); |
912 | lis3->write(lis3, CLICK_THSY_X, |
913 | (p->click_thresh_x & 0xf) | |
914 | (p->click_thresh_y << 4)); |
915 | |
916 | if (lis3->idev) { |
917 | input_set_capability(dev: lis3->idev, EV_KEY, BTN_X); |
918 | input_set_capability(dev: lis3->idev, EV_KEY, BTN_Y); |
919 | input_set_capability(dev: lis3->idev, EV_KEY, BTN_Z); |
920 | } |
921 | } |
922 | |
923 | if (p->wakeup_flags) { |
924 | lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags); |
925 | lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f); |
926 | /* pdata value + 1 to keep this backward compatible*/ |
927 | lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1); |
928 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
929 | } |
930 | |
931 | if (p->wakeup_flags2) { |
932 | lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2); |
933 | lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); |
934 | /* pdata value + 1 to keep this backward compatible*/ |
935 | lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1); |
936 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
937 | } |
938 | /* Configure hipass filters */ |
939 | lis3->write(lis3, CTRL_REG2, ctrl2); |
940 | |
941 | if (p->irq2) { |
942 | err = request_threaded_irq(irq: p->irq2, |
943 | NULL, |
944 | thread_fn: lis302dl_interrupt_thread2_8b, |
945 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
946 | (p->irq_flags2 & IRQF_TRIGGER_MASK), |
947 | DRIVER_NAME, dev: lis3); |
948 | if (err < 0) |
949 | pr_err("No second IRQ. Limited functionality\n" ); |
950 | } |
951 | } |
952 | |
953 | #ifdef CONFIG_OF |
954 | int lis3lv02d_init_dt(struct lis3lv02d *lis3) |
955 | { |
956 | struct lis3lv02d_platform_data *pdata; |
957 | struct device_node *np = lis3->of_node; |
958 | u32 val; |
959 | s32 sval; |
960 | |
961 | if (!lis3->of_node) |
962 | return 0; |
963 | |
964 | pdata = kzalloc(size: sizeof(*pdata), GFP_KERNEL); |
965 | if (!pdata) |
966 | return -ENOMEM; |
967 | |
968 | if (of_property_read_bool(np, propname: "st,click-single-x" )) |
969 | pdata->click_flags |= LIS3_CLICK_SINGLE_X; |
970 | if (of_property_read_bool(np, propname: "st,click-double-x" )) |
971 | pdata->click_flags |= LIS3_CLICK_DOUBLE_X; |
972 | |
973 | if (of_property_read_bool(np, propname: "st,click-single-y" )) |
974 | pdata->click_flags |= LIS3_CLICK_SINGLE_Y; |
975 | if (of_property_read_bool(np, propname: "st,click-double-y" )) |
976 | pdata->click_flags |= LIS3_CLICK_DOUBLE_Y; |
977 | |
978 | if (of_property_read_bool(np, propname: "st,click-single-z" )) |
979 | pdata->click_flags |= LIS3_CLICK_SINGLE_Z; |
980 | if (of_property_read_bool(np, propname: "st,click-double-z" )) |
981 | pdata->click_flags |= LIS3_CLICK_DOUBLE_Z; |
982 | |
983 | if (!of_property_read_u32(np, propname: "st,click-threshold-x" , out_value: &val)) |
984 | pdata->click_thresh_x = val; |
985 | if (!of_property_read_u32(np, propname: "st,click-threshold-y" , out_value: &val)) |
986 | pdata->click_thresh_y = val; |
987 | if (!of_property_read_u32(np, propname: "st,click-threshold-z" , out_value: &val)) |
988 | pdata->click_thresh_z = val; |
989 | |
990 | if (!of_property_read_u32(np, propname: "st,click-time-limit" , out_value: &val)) |
991 | pdata->click_time_limit = val; |
992 | if (!of_property_read_u32(np, propname: "st,click-latency" , out_value: &val)) |
993 | pdata->click_latency = val; |
994 | if (!of_property_read_u32(np, propname: "st,click-window" , out_value: &val)) |
995 | pdata->click_window = val; |
996 | |
997 | if (of_property_read_bool(np, propname: "st,irq1-disable" )) |
998 | pdata->irq_cfg |= LIS3_IRQ1_DISABLE; |
999 | if (of_property_read_bool(np, propname: "st,irq1-ff-wu-1" )) |
1000 | pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1; |
1001 | if (of_property_read_bool(np, propname: "st,irq1-ff-wu-2" )) |
1002 | pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2; |
1003 | if (of_property_read_bool(np, propname: "st,irq1-data-ready" )) |
1004 | pdata->irq_cfg |= LIS3_IRQ1_DATA_READY; |
1005 | if (of_property_read_bool(np, propname: "st,irq1-click" )) |
1006 | pdata->irq_cfg |= LIS3_IRQ1_CLICK; |
1007 | |
1008 | if (of_property_read_bool(np, propname: "st,irq2-disable" )) |
1009 | pdata->irq_cfg |= LIS3_IRQ2_DISABLE; |
1010 | if (of_property_read_bool(np, propname: "st,irq2-ff-wu-1" )) |
1011 | pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1; |
1012 | if (of_property_read_bool(np, propname: "st,irq2-ff-wu-2" )) |
1013 | pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2; |
1014 | if (of_property_read_bool(np, propname: "st,irq2-data-ready" )) |
1015 | pdata->irq_cfg |= LIS3_IRQ2_DATA_READY; |
1016 | if (of_property_read_bool(np, propname: "st,irq2-click" )) |
1017 | pdata->irq_cfg |= LIS3_IRQ2_CLICK; |
1018 | |
1019 | if (of_property_read_bool(np, propname: "st,irq-open-drain" )) |
1020 | pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN; |
1021 | if (of_property_read_bool(np, propname: "st,irq-active-low" )) |
1022 | pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW; |
1023 | |
1024 | if (!of_property_read_u32(np, propname: "st,wu-duration-1" , out_value: &val)) |
1025 | pdata->duration1 = val; |
1026 | if (!of_property_read_u32(np, propname: "st,wu-duration-2" , out_value: &val)) |
1027 | pdata->duration2 = val; |
1028 | |
1029 | if (of_property_read_bool(np, propname: "st,wakeup-x-lo" )) |
1030 | pdata->wakeup_flags |= LIS3_WAKEUP_X_LO; |
1031 | if (of_property_read_bool(np, propname: "st,wakeup-x-hi" )) |
1032 | pdata->wakeup_flags |= LIS3_WAKEUP_X_HI; |
1033 | if (of_property_read_bool(np, propname: "st,wakeup-y-lo" )) |
1034 | pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO; |
1035 | if (of_property_read_bool(np, propname: "st,wakeup-y-hi" )) |
1036 | pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI; |
1037 | if (of_property_read_bool(np, propname: "st,wakeup-z-lo" )) |
1038 | pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO; |
1039 | if (of_property_read_bool(np, propname: "st,wakeup-z-hi" )) |
1040 | pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI; |
1041 | if (of_get_property(node: np, name: "st,wakeup-threshold" , lenp: &val)) |
1042 | pdata->wakeup_thresh = val; |
1043 | |
1044 | if (of_property_read_bool(np, propname: "st,wakeup2-x-lo" )) |
1045 | pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO; |
1046 | if (of_property_read_bool(np, propname: "st,wakeup2-x-hi" )) |
1047 | pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI; |
1048 | if (of_property_read_bool(np, propname: "st,wakeup2-y-lo" )) |
1049 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO; |
1050 | if (of_property_read_bool(np, propname: "st,wakeup2-y-hi" )) |
1051 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI; |
1052 | if (of_property_read_bool(np, propname: "st,wakeup2-z-lo" )) |
1053 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO; |
1054 | if (of_property_read_bool(np, propname: "st,wakeup2-z-hi" )) |
1055 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI; |
1056 | if (of_get_property(node: np, name: "st,wakeup2-threshold" , lenp: &val)) |
1057 | pdata->wakeup_thresh2 = val; |
1058 | |
1059 | if (!of_property_read_u32(np, propname: "st,highpass-cutoff-hz" , out_value: &val)) { |
1060 | switch (val) { |
1061 | case 1: |
1062 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ; |
1063 | break; |
1064 | case 2: |
1065 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ; |
1066 | break; |
1067 | case 4: |
1068 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ; |
1069 | break; |
1070 | case 8: |
1071 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ; |
1072 | break; |
1073 | } |
1074 | } |
1075 | |
1076 | if (of_property_read_bool(np, propname: "st,hipass1-disable" )) |
1077 | pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE; |
1078 | if (of_property_read_bool(np, propname: "st,hipass2-disable" )) |
1079 | pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE; |
1080 | |
1081 | if (of_property_read_s32(np, propname: "st,axis-x" , out_value: &sval) == 0) |
1082 | pdata->axis_x = sval; |
1083 | if (of_property_read_s32(np, propname: "st,axis-y" , out_value: &sval) == 0) |
1084 | pdata->axis_y = sval; |
1085 | if (of_property_read_s32(np, propname: "st,axis-z" , out_value: &sval) == 0) |
1086 | pdata->axis_z = sval; |
1087 | |
1088 | if (of_property_read_u32(np, propname: "st,default-rate" , out_value: &val) == 0) |
1089 | pdata->default_rate = val; |
1090 | |
1091 | if (of_property_read_s32(np, propname: "st,min-limit-x" , out_value: &sval) == 0) |
1092 | pdata->st_min_limits[0] = sval; |
1093 | if (of_property_read_s32(np, propname: "st,min-limit-y" , out_value: &sval) == 0) |
1094 | pdata->st_min_limits[1] = sval; |
1095 | if (of_property_read_s32(np, propname: "st,min-limit-z" , out_value: &sval) == 0) |
1096 | pdata->st_min_limits[2] = sval; |
1097 | |
1098 | if (of_property_read_s32(np, propname: "st,max-limit-x" , out_value: &sval) == 0) |
1099 | pdata->st_max_limits[0] = sval; |
1100 | if (of_property_read_s32(np, propname: "st,max-limit-y" , out_value: &sval) == 0) |
1101 | pdata->st_max_limits[1] = sval; |
1102 | if (of_property_read_s32(np, propname: "st,max-limit-z" , out_value: &sval) == 0) |
1103 | pdata->st_max_limits[2] = sval; |
1104 | |
1105 | |
1106 | lis3->pdata = pdata; |
1107 | |
1108 | return 0; |
1109 | } |
1110 | |
1111 | #else |
1112 | int lis3lv02d_init_dt(struct lis3lv02d *lis3) |
1113 | { |
1114 | return 0; |
1115 | } |
1116 | #endif |
1117 | EXPORT_SYMBOL_GPL(lis3lv02d_init_dt); |
1118 | |
1119 | /* |
1120 | * Initialise the accelerometer and the various subsystems. |
1121 | * Should be rather independent of the bus system. |
1122 | */ |
1123 | int lis3lv02d_init_device(struct lis3lv02d *lis3) |
1124 | { |
1125 | int err; |
1126 | irq_handler_t thread_fn; |
1127 | int irq_flags = 0; |
1128 | |
1129 | lis3->whoami = lis3lv02d_read_8(lis3, reg: WHO_AM_I); |
1130 | |
1131 | switch (lis3->whoami) { |
1132 | case WAI_12B: |
1133 | pr_info("12 bits sensor found\n" ); |
1134 | lis3->read_data = lis3lv02d_read_12; |
1135 | lis3->mdps_max_val = 2048; |
1136 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
1137 | lis3->odrs = lis3_12_rates; |
1138 | lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1; |
1139 | lis3->scale = LIS3_SENSITIVITY_12B; |
1140 | lis3->regs = lis3_wai12_regs; |
1141 | lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs); |
1142 | break; |
1143 | case WAI_8B: |
1144 | pr_info("8 bits sensor found\n" ); |
1145 | lis3->read_data = lis3lv02d_read_8; |
1146 | lis3->mdps_max_val = 128; |
1147 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
1148 | lis3->odrs = lis3_8_rates; |
1149 | lis3->odr_mask = CTRL1_DR; |
1150 | lis3->scale = LIS3_SENSITIVITY_8B; |
1151 | lis3->regs = lis3_wai8_regs; |
1152 | lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs); |
1153 | break; |
1154 | case WAI_3DC: |
1155 | pr_info("8 bits 3DC sensor found\n" ); |
1156 | lis3->read_data = lis3lv02d_read_8; |
1157 | lis3->mdps_max_val = 128; |
1158 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
1159 | lis3->odrs = lis3_3dc_rates; |
1160 | lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; |
1161 | lis3->scale = LIS3_SENSITIVITY_8B; |
1162 | break; |
1163 | case WAI_3DLH: |
1164 | pr_info("16 bits lis331dlh sensor found\n" ); |
1165 | lis3->read_data = lis331dlh_read_data; |
1166 | lis3->mdps_max_val = 2048; /* 12 bits for 2G */ |
1167 | lis3->shift_adj = SHIFT_ADJ_2G; |
1168 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
1169 | lis3->odrs = lis3_3dlh_rates; |
1170 | lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1; |
1171 | lis3->scale = LIS3DLH_SENSITIVITY_2G; |
1172 | break; |
1173 | default: |
1174 | pr_err("unknown sensor type 0x%X\n" , lis3->whoami); |
1175 | return -ENODEV; |
1176 | } |
1177 | |
1178 | lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
1179 | sizeof(lis3_wai12_regs)), GFP_KERNEL); |
1180 | |
1181 | if (lis3->reg_cache == NULL) |
1182 | return -ENOMEM; |
1183 | |
1184 | mutex_init(&lis3->mutex); |
1185 | atomic_set(v: &lis3->wake_thread, i: 0); |
1186 | |
1187 | lis3lv02d_add_fs(lis3); |
1188 | err = lis3lv02d_poweron(lis3); |
1189 | if (err) { |
1190 | lis3lv02d_remove_fs(lis3); |
1191 | return err; |
1192 | } |
1193 | |
1194 | if (lis3->pm_dev) { |
1195 | pm_runtime_set_active(dev: lis3->pm_dev); |
1196 | pm_runtime_enable(dev: lis3->pm_dev); |
1197 | } |
1198 | |
1199 | if (lis3lv02d_joystick_enable(lis3)) |
1200 | pr_err("joystick initialization failed\n" ); |
1201 | |
1202 | /* passing in platform specific data is purely optional and only |
1203 | * used by the SPI transport layer at the moment */ |
1204 | if (lis3->pdata) { |
1205 | struct lis3lv02d_platform_data *p = lis3->pdata; |
1206 | |
1207 | if (lis3->whoami == WAI_8B) |
1208 | lis3lv02d_8b_configure(lis3, p); |
1209 | |
1210 | irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
1211 | |
1212 | lis3->irq_cfg = p->irq_cfg; |
1213 | if (p->irq_cfg) |
1214 | lis3->write(lis3, CTRL_REG3, p->irq_cfg); |
1215 | |
1216 | if (p->default_rate) |
1217 | lis3lv02d_set_odr(lis3, rate: p->default_rate); |
1218 | } |
1219 | |
1220 | /* bail if we did not get an IRQ from the bus layer */ |
1221 | if (!lis3->irq) { |
1222 | pr_debug("No IRQ. Disabling /dev/freefall\n" ); |
1223 | goto out; |
1224 | } |
1225 | |
1226 | /* |
1227 | * The sensor can generate interrupts for free-fall and direction |
1228 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep |
1229 | * the things simple and _fast_ we activate it only for free-fall, so |
1230 | * no need to read register (very slow with ACPI). For the same reason, |
1231 | * we forbid shared interrupts. |
1232 | * |
1233 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the |
1234 | * io-apic is not configurable (and generates a warning) but I keep it |
1235 | * in case of support for other hardware. |
1236 | */ |
1237 | if (lis3->pdata && lis3->whoami == WAI_8B) |
1238 | thread_fn = lis302dl_interrupt_thread1_8b; |
1239 | else |
1240 | thread_fn = NULL; |
1241 | |
1242 | err = request_threaded_irq(irq: lis3->irq, handler: lis302dl_interrupt, |
1243 | thread_fn, |
1244 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
1245 | irq_flags, |
1246 | DRIVER_NAME, dev: lis3); |
1247 | |
1248 | if (err < 0) { |
1249 | pr_err("Cannot get IRQ\n" ); |
1250 | goto out; |
1251 | } |
1252 | |
1253 | lis3->miscdev.minor = MISC_DYNAMIC_MINOR; |
1254 | lis3->miscdev.name = "freefall" ; |
1255 | lis3->miscdev.fops = &lis3lv02d_misc_fops; |
1256 | |
1257 | if (misc_register(misc: &lis3->miscdev)) |
1258 | pr_err("misc_register failed\n" ); |
1259 | out: |
1260 | return 0; |
1261 | } |
1262 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); |
1263 | |
1264 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver" ); |
1265 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek" ); |
1266 | MODULE_LICENSE("GPL" ); |
1267 | |