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455fbdd3 PM |
1 | /* |
2 | * lis3lv02d.c - ST LIS3LV02DL accelerometer driver | |
3 | * | |
4 | * Copyright (C) 2007-2008 Yan Burman | |
5 | * Copyright (C) 2008 Eric Piel | |
ef2cfc79 | 6 | * Copyright (C) 2008-2009 Pavel Machek |
455fbdd3 PM |
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 | ||
63366d37 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
455fbdd3 | 25 | #include <linux/kernel.h> |
174cd4b1 | 26 | #include <linux/sched/signal.h> |
455fbdd3 PM |
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> | |
dc6ea97b | 32 | #include <linux/input-polldev.h> |
455fbdd3 PM |
33 | #include <linux/delay.h> |
34 | #include <linux/wait.h> | |
35 | #include <linux/poll.h> | |
f9deb41f | 36 | #include <linux/slab.h> |
455fbdd3 | 37 | #include <linux/freezer.h> |
455fbdd3 | 38 | #include <linux/uaccess.h> |
ef2cfc79 | 39 | #include <linux/miscdevice.h> |
2a346996 | 40 | #include <linux/pm_runtime.h> |
ff606677 | 41 | #include <linux/atomic.h> |
cbac1a8b | 42 | #include <linux/of_device.h> |
455fbdd3 PM |
43 | #include "lis3lv02d.h" |
44 | ||
45 | #define DRIVER_NAME "lis3lv02d" | |
455fbdd3 PM |
46 | |
47 | /* joystick device poll interval in milliseconds */ | |
48 | #define MDPS_POLL_INTERVAL 50 | |
4a70a413 SO |
49 | #define MDPS_POLL_MIN 0 |
50 | #define MDPS_POLL_MAX 2000 | |
2a346996 SO |
51 | |
52 | #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */ | |
53 | ||
029756d0 SO |
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 | ||
455fbdd3 PM |
61 | /* |
62 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
bc62c147 | 63 | * because they are generated even if the data do not change. So it's better |
455fbdd3 PM |
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 | ||
641615ab SO |
70 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
71 | #define LIS3_PWRON_DELAY_WAI_8B (3000) | |
72 | ||
32496c76 SO |
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 | ||
0bf5a8be | 84 | /* |
e2b2ed83 AC |
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. | |
0bf5a8be AC |
89 | */ |
90 | #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024) | |
91 | #define SHIFT_ADJ_2G 4 | |
92 | ||
477bc918 SO |
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 | |
32496c76 | 97 | |
a38da2ed | 98 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 99 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 | 100 | }; |
be84cfc5 | 101 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 102 | |
2ee32144 TI |
103 | /* just like param_set_int() but does sanity-check so that it won't point |
104 | * over the axis array size | |
105 | */ | |
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 | ||
9c27847d | 119 | static const struct kernel_param_ops param_ops_axis = { |
2ee32144 TI |
120 | .set = param_set_axis, |
121 | .get = param_get_int, | |
122 | }; | |
123 | ||
bafeafea RR |
124 | #define param_check_axis(name, p) param_check_int(name, p) |
125 | ||
2ee32144 TI |
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 | ||
a38da2ed DM |
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 | ||
bc62c147 | 138 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
139 | { |
140 | u8 lo, hi; | |
141 | ||
a38da2ed DM |
142 | lis3->read(lis3, reg - 1, &lo); |
143 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
144 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
145 | return (s16)((hi << 8) | lo); | |
146 | } | |
147 | ||
0bf5a8be | 148 | /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */ |
e2b2ed83 | 149 | static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg) |
0bf5a8be AC |
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 | ||
455fbdd3 PM |
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 | */ | |
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 | |
a38da2ed DM |
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 | |
455fbdd3 PM |
182 | * |
183 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
184 | */ | |
a38da2ed | 185 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
186 | { |
187 | int position[3]; | |
32496c76 | 188 | int i; |
455fbdd3 | 189 | |
f10a5407 | 190 | if (lis3->blkread) { |
895c156c | 191 | if (lis3->whoami == WAI_12B) { |
f10a5407 SO |
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 | } | |
455fbdd3 | 208 | |
32496c76 SO |
209 | for (i = 0; i < 3; i++) |
210 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; | |
211 | ||
a002ee89 EP |
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); | |
455fbdd3 PM |
215 | } |
216 | ||
641615ab SO |
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}; | |
78537c3b | 220 | static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
0bf5a8be | 221 | static int lis3_3dlh_rates[4] = {50, 100, 400, 1000}; |
641615ab | 222 | |
a253aaef | 223 | /* ODR is Output Data Rate */ |
895c156c | 224 | static int lis3lv02d_get_odr(struct lis3lv02d *lis3) |
641615ab SO |
225 | { |
226 | u8 ctrl; | |
a253aaef | 227 | int shift; |
641615ab | 228 | |
895c156c ÉP |
229 | lis3->read(lis3, CTRL_REG1, &ctrl); |
230 | ctrl &= lis3->odr_mask; | |
231 | shift = ffs(lis3->odr_mask) - 1; | |
232 | return lis3->odrs[(ctrl >> shift)]; | |
a253aaef | 233 | } |
641615ab | 234 | |
1510dd59 ÉP |
235 | static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) |
236 | { | |
895c156c | 237 | int div = lis3lv02d_get_odr(lis3); |
1510dd59 ÉP |
238 | |
239 | if (WARN_ONCE(div == 0, "device returned spurious data")) | |
240 | return -ENXIO; | |
241 | ||
242 | /* LIS3 power on delay is quite long */ | |
243 | msleep(lis3->pwron_delay / div); | |
244 | return 0; | |
245 | } | |
246 | ||
895c156c | 247 | static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate) |
a253aaef SO |
248 | { |
249 | u8 ctrl; | |
250 | int i, len, shift; | |
251 | ||
78537c3b TI |
252 | if (!rate) |
253 | return -EINVAL; | |
254 | ||
895c156c ÉP |
255 | lis3->read(lis3, CTRL_REG1, &ctrl); |
256 | ctrl &= ~lis3->odr_mask; | |
257 | len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */ | |
258 | shift = ffs(lis3->odr_mask) - 1; | |
a253aaef SO |
259 | |
260 | for (i = 0; i < len; i++) | |
895c156c ÉP |
261 | if (lis3->odrs[i] == rate) { |
262 | lis3->write(lis3, CTRL_REG1, | |
a253aaef SO |
263 | ctrl | (i << shift)); |
264 | return 0; | |
265 | } | |
266 | return -EINVAL; | |
641615ab SO |
267 | } |
268 | ||
2db4a76d SO |
269 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
270 | { | |
78537c3b | 271 | u8 ctlreg, reg; |
2db4a76d SO |
272 | s16 x, y, z; |
273 | u8 selftest; | |
274 | int ret; | |
029756d0 SO |
275 | u8 ctrl_reg_data; |
276 | unsigned char irq_cfg; | |
2db4a76d SO |
277 | |
278 | mutex_lock(&lis3->mutex); | |
029756d0 SO |
279 | |
280 | irq_cfg = lis3->irq_cfg; | |
895c156c | 281 | if (lis3->whoami == WAI_8B) { |
029756d0 SO |
282 | lis3->data_ready_count[IRQ_LINE0] = 0; |
283 | lis3->data_ready_count[IRQ_LINE1] = 0; | |
284 | ||
285 | /* Change interrupt cfg to data ready for selftest */ | |
895c156c | 286 | atomic_inc(&lis3->wake_thread); |
029756d0 SO |
287 | lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; |
288 | lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); | |
289 | lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & | |
290 | ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | | |
291 | (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); | |
292 | } | |
293 | ||
0bf5a8be | 294 | if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) { |
78537c3b TI |
295 | ctlreg = CTRL_REG4; |
296 | selftest = CTRL4_ST0; | |
297 | } else { | |
298 | ctlreg = CTRL_REG1; | |
895c156c | 299 | if (lis3->whoami == WAI_12B) |
78537c3b TI |
300 | selftest = CTRL1_ST; |
301 | else | |
302 | selftest = CTRL1_STP; | |
303 | } | |
2db4a76d | 304 | |
78537c3b TI |
305 | lis3->read(lis3, ctlreg, ®); |
306 | lis3->write(lis3, ctlreg, (reg | selftest)); | |
1510dd59 ÉP |
307 | ret = lis3lv02d_get_pwron_wait(lis3); |
308 | if (ret) | |
309 | goto fail; | |
2db4a76d SO |
310 | |
311 | /* Read directly to avoid axis remap */ | |
312 | x = lis3->read_data(lis3, OUTX); | |
313 | y = lis3->read_data(lis3, OUTY); | |
314 | z = lis3->read_data(lis3, OUTZ); | |
315 | ||
316 | /* back to normal settings */ | |
78537c3b | 317 | lis3->write(lis3, ctlreg, reg); |
1510dd59 ÉP |
318 | ret = lis3lv02d_get_pwron_wait(lis3); |
319 | if (ret) | |
320 | goto fail; | |
2db4a76d SO |
321 | |
322 | results[0] = x - lis3->read_data(lis3, OUTX); | |
323 | results[1] = y - lis3->read_data(lis3, OUTY); | |
324 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
325 | ||
326 | ret = 0; | |
029756d0 | 327 | |
895c156c | 328 | if (lis3->whoami == WAI_8B) { |
029756d0 | 329 | /* Restore original interrupt configuration */ |
895c156c | 330 | atomic_dec(&lis3->wake_thread); |
029756d0 SO |
331 | lis3->write(lis3, CTRL_REG3, ctrl_reg_data); |
332 | lis3->irq_cfg = irq_cfg; | |
333 | ||
334 | if ((irq_cfg & LIS3_IRQ1_MASK) && | |
335 | lis3->data_ready_count[IRQ_LINE0] < 2) { | |
336 | ret = SELFTEST_IRQ; | |
337 | goto fail; | |
338 | } | |
339 | ||
340 | if ((irq_cfg & LIS3_IRQ2_MASK) && | |
341 | lis3->data_ready_count[IRQ_LINE1] < 2) { | |
342 | ret = SELFTEST_IRQ; | |
343 | goto fail; | |
344 | } | |
345 | } | |
346 | ||
2db4a76d SO |
347 | if (lis3->pdata) { |
348 | int i; | |
349 | for (i = 0; i < 3; i++) { | |
350 | /* Check against selftest acceptance limits */ | |
351 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
352 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
029756d0 | 353 | ret = SELFTEST_FAIL; |
2db4a76d SO |
354 | goto fail; |
355 | } | |
356 | } | |
357 | } | |
358 | ||
359 | /* test passed */ | |
360 | fail: | |
361 | mutex_unlock(&lis3->mutex); | |
362 | return ret; | |
363 | } | |
364 | ||
f9deb41f SO |
365 | /* |
366 | * Order of registers in the list affects to order of the restore process. | |
367 | * Perhaps it is a good idea to set interrupt enable register as a last one | |
368 | * after all other configurations | |
369 | */ | |
370 | static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, | |
371 | FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, | |
372 | CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, | |
373 | CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, | |
374 | CTRL_REG1, CTRL_REG2, CTRL_REG3}; | |
375 | ||
376 | static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, | |
377 | FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, | |
378 | DD_THSE_L, DD_THSE_H, | |
379 | CTRL_REG1, CTRL_REG3, CTRL_REG2}; | |
380 | ||
381 | static inline void lis3_context_save(struct lis3lv02d *lis3) | |
382 | { | |
383 | int i; | |
384 | for (i = 0; i < lis3->regs_size; i++) | |
385 | lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); | |
386 | lis3->regs_stored = true; | |
387 | } | |
388 | ||
389 | static inline void lis3_context_restore(struct lis3lv02d *lis3) | |
390 | { | |
391 | int i; | |
392 | if (lis3->regs_stored) | |
393 | for (i = 0; i < lis3->regs_size; i++) | |
394 | lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); | |
395 | } | |
396 | ||
a38da2ed | 397 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 398 | { |
f9deb41f SO |
399 | if (lis3->reg_ctrl) |
400 | lis3_context_save(lis3); | |
a002ee89 EP |
401 | /* disable X,Y,Z axis and power down */ |
402 | lis3->write(lis3, CTRL_REG1, 0x00); | |
f9deb41f SO |
403 | if (lis3->reg_ctrl) |
404 | lis3->reg_ctrl(lis3, LIS3_REG_OFF); | |
455fbdd3 | 405 | } |
cfce41a6 | 406 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 407 | |
1510dd59 | 408 | int lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 409 | { |
1510dd59 | 410 | int err; |
a002ee89 | 411 | u8 reg; |
455fbdd3 | 412 | |
a002ee89 | 413 | lis3->init(lis3); |
455fbdd3 | 414 | |
a002ee89 EP |
415 | /* |
416 | * Common configuration | |
4b5d95b3 ÉP |
417 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
418 | * both have been read. So the value read will always be correct. | |
2a7fade7 | 419 | * Set BOOT bit to refresh factory tuning values. |
a002ee89 | 420 | */ |
05faadcf TI |
421 | if (lis3->pdata) { |
422 | lis3->read(lis3, CTRL_REG2, ®); | |
423 | if (lis3->whoami == WAI_12B) | |
424 | reg |= CTRL2_BDU | CTRL2_BOOT; | |
0bf5a8be AC |
425 | else if (lis3->whoami == WAI_3DLH) |
426 | reg |= CTRL2_BOOT_3DLH; | |
05faadcf TI |
427 | else |
428 | reg |= CTRL2_BOOT_8B; | |
429 | lis3->write(lis3, CTRL_REG2, reg); | |
0bf5a8be AC |
430 | |
431 | if (lis3->whoami == WAI_3DLH) { | |
432 | lis3->read(lis3, CTRL_REG4, ®); | |
433 | reg |= CTRL4_BDU; | |
434 | lis3->write(lis3, CTRL_REG4, reg); | |
435 | } | |
05faadcf | 436 | } |
2a7fade7 | 437 | |
1510dd59 ÉP |
438 | err = lis3lv02d_get_pwron_wait(lis3); |
439 | if (err) | |
440 | return err; | |
2a7fade7 | 441 | |
f9deb41f SO |
442 | if (lis3->reg_ctrl) |
443 | lis3_context_restore(lis3); | |
1510dd59 ÉP |
444 | |
445 | return 0; | |
455fbdd3 | 446 | } |
a002ee89 EP |
447 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
448 | ||
455fbdd3 | 449 | |
6d94d408 SO |
450 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
451 | { | |
895c156c | 452 | struct lis3lv02d *lis3 = pidev->private; |
6d94d408 SO |
453 | int x, y, z; |
454 | ||
895c156c ÉP |
455 | mutex_lock(&lis3->mutex); |
456 | lis3lv02d_get_xyz(lis3, &x, &y, &z); | |
6d94d408 SO |
457 | input_report_abs(pidev->input, ABS_X, x); |
458 | input_report_abs(pidev->input, ABS_Y, y); | |
459 | input_report_abs(pidev->input, ABS_Z, z); | |
460 | input_sync(pidev->input); | |
895c156c | 461 | mutex_unlock(&lis3->mutex); |
6d94d408 SO |
462 | } |
463 | ||
2a346996 SO |
464 | static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) |
465 | { | |
895c156c | 466 | struct lis3lv02d *lis3 = pidev->private; |
e726111f | 467 | |
895c156c ÉP |
468 | if (lis3->pm_dev) |
469 | pm_runtime_get_sync(lis3->pm_dev); | |
470 | ||
471 | if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev) | |
472 | atomic_set(&lis3->wake_thread, 1); | |
821f6646 SO |
473 | /* |
474 | * Update coordinates for the case where poll interval is 0 and | |
475 | * the chip in running purely under interrupt control | |
476 | */ | |
477 | lis3lv02d_joystick_poll(pidev); | |
2a346996 SO |
478 | } |
479 | ||
480 | static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) | |
481 | { | |
895c156c ÉP |
482 | struct lis3lv02d *lis3 = pidev->private; |
483 | ||
484 | atomic_set(&lis3->wake_thread, 0); | |
485 | if (lis3->pm_dev) | |
486 | pm_runtime_put(lis3->pm_dev); | |
2a346996 SO |
487 | } |
488 | ||
895c156c | 489 | static irqreturn_t lis302dl_interrupt(int irq, void *data) |
ef2cfc79 | 490 | { |
895c156c ÉP |
491 | struct lis3lv02d *lis3 = data; |
492 | ||
493 | if (!test_bit(0, &lis3->misc_opened)) | |
92ba4fe4 SO |
494 | goto out; |
495 | ||
ef2cfc79 PM |
496 | /* |
497 | * Be careful: on some HP laptops the bios force DD when on battery and | |
498 | * the lid is closed. This leads to interrupts as soon as a little move | |
499 | * is done. | |
500 | */ | |
895c156c | 501 | atomic_inc(&lis3->count); |
ef2cfc79 | 502 | |
895c156c ÉP |
503 | wake_up_interruptible(&lis3->misc_wait); |
504 | kill_fasync(&lis3->async_queue, SIGIO, POLL_IN); | |
92ba4fe4 | 505 | out: |
895c156c | 506 | if (atomic_read(&lis3->wake_thread)) |
92ba4fe4 | 507 | return IRQ_WAKE_THREAD; |
ef2cfc79 PM |
508 | return IRQ_HANDLED; |
509 | } | |
510 | ||
6d94d408 SO |
511 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
512 | { | |
513 | struct input_dev *dev = lis3->idev->input; | |
514 | u8 click_src; | |
515 | ||
516 | mutex_lock(&lis3->mutex); | |
517 | lis3->read(lis3, CLICK_SRC, &click_src); | |
518 | ||
519 | if (click_src & CLICK_SINGLE_X) { | |
520 | input_report_key(dev, lis3->mapped_btns[0], 1); | |
521 | input_report_key(dev, lis3->mapped_btns[0], 0); | |
522 | } | |
523 | ||
524 | if (click_src & CLICK_SINGLE_Y) { | |
525 | input_report_key(dev, lis3->mapped_btns[1], 1); | |
526 | input_report_key(dev, lis3->mapped_btns[1], 0); | |
527 | } | |
528 | ||
529 | if (click_src & CLICK_SINGLE_Z) { | |
530 | input_report_key(dev, lis3->mapped_btns[2], 1); | |
531 | input_report_key(dev, lis3->mapped_btns[2], 0); | |
532 | } | |
533 | input_sync(dev); | |
534 | mutex_unlock(&lis3->mutex); | |
535 | } | |
536 | ||
029756d0 | 537 | static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
ef2cfc79 | 538 | { |
029756d0 SO |
539 | int dummy; |
540 | ||
541 | /* Dummy read to ack interrupt */ | |
542 | lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy); | |
543 | lis3->data_ready_count[index]++; | |
544 | } | |
6d94d408 | 545 | |
029756d0 SO |
546 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
547 | { | |
6d94d408 | 548 | struct lis3lv02d *lis3 = data; |
029756d0 | 549 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
6d94d408 | 550 | |
029756d0 | 551 | if (irq_cfg == LIS3_IRQ1_CLICK) |
6d94d408 | 552 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
553 | else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
554 | lis302dl_data_ready(lis3, IRQ_LINE0); | |
6d94d408 | 555 | else |
e726111f | 556 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 557 | |
92ba4fe4 SO |
558 | return IRQ_HANDLED; |
559 | } | |
ef2cfc79 | 560 | |
92ba4fe4 SO |
561 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
562 | { | |
6d94d408 | 563 | struct lis3lv02d *lis3 = data; |
029756d0 | 564 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
6d94d408 | 565 | |
029756d0 | 566 | if (irq_cfg == LIS3_IRQ2_CLICK) |
6d94d408 | 567 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
568 | else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
569 | lis302dl_data_ready(lis3, IRQ_LINE1); | |
6d94d408 | 570 | else |
e726111f | 571 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 572 | |
92ba4fe4 SO |
573 | return IRQ_HANDLED; |
574 | } | |
575 | ||
576 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
577 | { | |
895c156c ÉP |
578 | struct lis3lv02d *lis3 = container_of(file->private_data, |
579 | struct lis3lv02d, miscdev); | |
580 | ||
581 | if (test_and_set_bit(0, &lis3->misc_opened)) | |
ef2cfc79 PM |
582 | return -EBUSY; /* already open */ |
583 | ||
895c156c ÉP |
584 | if (lis3->pm_dev) |
585 | pm_runtime_get_sync(lis3->pm_dev); | |
2a346996 | 586 | |
895c156c | 587 | atomic_set(&lis3->count, 0); |
ef2cfc79 PM |
588 | return 0; |
589 | } | |
590 | ||
591 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
592 | { | |
895c156c ÉP |
593 | struct lis3lv02d *lis3 = container_of(file->private_data, |
594 | struct lis3lv02d, miscdev); | |
595 | ||
895c156c ÉP |
596 | clear_bit(0, &lis3->misc_opened); /* release the device */ |
597 | if (lis3->pm_dev) | |
598 | pm_runtime_put(lis3->pm_dev); | |
ef2cfc79 PM |
599 | return 0; |
600 | } | |
601 | ||
602 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
603 | size_t count, loff_t *pos) | |
604 | { | |
895c156c ÉP |
605 | struct lis3lv02d *lis3 = container_of(file->private_data, |
606 | struct lis3lv02d, miscdev); | |
607 | ||
ef2cfc79 PM |
608 | DECLARE_WAITQUEUE(wait, current); |
609 | u32 data; | |
610 | unsigned char byte_data; | |
611 | ssize_t retval = 1; | |
612 | ||
613 | if (count < 1) | |
614 | return -EINVAL; | |
615 | ||
895c156c | 616 | add_wait_queue(&lis3->misc_wait, &wait); |
ef2cfc79 PM |
617 | while (true) { |
618 | set_current_state(TASK_INTERRUPTIBLE); | |
895c156c | 619 | data = atomic_xchg(&lis3->count, 0); |
ef2cfc79 PM |
620 | if (data) |
621 | break; | |
622 | ||
623 | if (file->f_flags & O_NONBLOCK) { | |
624 | retval = -EAGAIN; | |
625 | goto out; | |
626 | } | |
627 | ||
628 | if (signal_pending(current)) { | |
629 | retval = -ERESTARTSYS; | |
630 | goto out; | |
631 | } | |
632 | ||
633 | schedule(); | |
634 | } | |
635 | ||
636 | if (data < 255) | |
637 | byte_data = data; | |
638 | else | |
639 | byte_data = 255; | |
640 | ||
641 | /* make sure we are not going into copy_to_user() with | |
642 | * TASK_INTERRUPTIBLE state */ | |
643 | set_current_state(TASK_RUNNING); | |
644 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
645 | retval = -EFAULT; | |
646 | ||
647 | out: | |
648 | __set_current_state(TASK_RUNNING); | |
895c156c | 649 | remove_wait_queue(&lis3->misc_wait, &wait); |
ef2cfc79 PM |
650 | |
651 | return retval; | |
652 | } | |
653 | ||
654 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
655 | { | |
895c156c ÉP |
656 | struct lis3lv02d *lis3 = container_of(file->private_data, |
657 | struct lis3lv02d, miscdev); | |
658 | ||
659 | poll_wait(file, &lis3->misc_wait, wait); | |
660 | if (atomic_read(&lis3->count)) | |
ef2cfc79 PM |
661 | return POLLIN | POLLRDNORM; |
662 | return 0; | |
663 | } | |
664 | ||
665 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
666 | { | |
895c156c ÉP |
667 | struct lis3lv02d *lis3 = container_of(file->private_data, |
668 | struct lis3lv02d, miscdev); | |
669 | ||
670 | return fasync_helper(fd, file, on, &lis3->async_queue); | |
ef2cfc79 PM |
671 | } |
672 | ||
673 | static const struct file_operations lis3lv02d_misc_fops = { | |
674 | .owner = THIS_MODULE, | |
675 | .llseek = no_llseek, | |
676 | .read = lis3lv02d_misc_read, | |
677 | .open = lis3lv02d_misc_open, | |
678 | .release = lis3lv02d_misc_release, | |
679 | .poll = lis3lv02d_misc_poll, | |
680 | .fasync = lis3lv02d_misc_fasync, | |
681 | }; | |
682 | ||
e1e5687d | 683 | int lis3lv02d_joystick_enable(struct lis3lv02d *lis3) |
455fbdd3 | 684 | { |
dc6ea97b | 685 | struct input_dev *input_dev; |
455fbdd3 | 686 | int err; |
32496c76 | 687 | int max_val, fuzz, flat; |
6d94d408 | 688 | int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
455fbdd3 | 689 | |
895c156c | 690 | if (lis3->idev) |
455fbdd3 PM |
691 | return -EINVAL; |
692 | ||
895c156c ÉP |
693 | lis3->idev = input_allocate_polled_device(); |
694 | if (!lis3->idev) | |
455fbdd3 PM |
695 | return -ENOMEM; |
696 | ||
895c156c ÉP |
697 | lis3->idev->poll = lis3lv02d_joystick_poll; |
698 | lis3->idev->open = lis3lv02d_joystick_open; | |
699 | lis3->idev->close = lis3lv02d_joystick_close; | |
700 | lis3->idev->poll_interval = MDPS_POLL_INTERVAL; | |
701 | lis3->idev->poll_interval_min = MDPS_POLL_MIN; | |
702 | lis3->idev->poll_interval_max = MDPS_POLL_MAX; | |
703 | lis3->idev->private = lis3; | |
704 | input_dev = lis3->idev->input; | |
dc6ea97b | 705 | |
dc6ea97b EP |
706 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
707 | input_dev->phys = DRIVER_NAME "/input0"; | |
708 | input_dev->id.bustype = BUS_HOST; | |
709 | input_dev->id.vendor = 0; | |
895c156c | 710 | input_dev->dev.parent = &lis3->pdev->dev; |
455fbdd3 | 711 | |
dc6ea97b | 712 | set_bit(EV_ABS, input_dev->evbit); |
895c156c ÉP |
713 | max_val = (lis3->mdps_max_val * lis3->scale) / LIS3_ACCURACY; |
714 | if (lis3->whoami == WAI_12B) { | |
477bc918 SO |
715 | fuzz = LIS3_DEFAULT_FUZZ_12B; |
716 | flat = LIS3_DEFAULT_FLAT_12B; | |
717 | } else { | |
718 | fuzz = LIS3_DEFAULT_FUZZ_8B; | |
719 | flat = LIS3_DEFAULT_FLAT_8B; | |
720 | } | |
895c156c ÉP |
721 | fuzz = (fuzz * lis3->scale) / LIS3_ACCURACY; |
722 | flat = (flat * lis3->scale) / LIS3_ACCURACY; | |
477bc918 | 723 | |
32496c76 SO |
724 | input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); |
725 | input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); | |
726 | input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); | |
455fbdd3 | 727 | |
895c156c ÉP |
728 | lis3->mapped_btns[0] = lis3lv02d_get_axis(abs(lis3->ac.x), btns); |
729 | lis3->mapped_btns[1] = lis3lv02d_get_axis(abs(lis3->ac.y), btns); | |
730 | lis3->mapped_btns[2] = lis3lv02d_get_axis(abs(lis3->ac.z), btns); | |
6d94d408 | 731 | |
895c156c | 732 | err = input_register_polled_device(lis3->idev); |
455fbdd3 | 733 | if (err) { |
895c156c ÉP |
734 | input_free_polled_device(lis3->idev); |
735 | lis3->idev = NULL; | |
455fbdd3 PM |
736 | } |
737 | ||
738 | return err; | |
739 | } | |
cfce41a6 | 740 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 741 | |
e1e5687d | 742 | void lis3lv02d_joystick_disable(struct lis3lv02d *lis3) |
455fbdd3 | 743 | { |
895c156c ÉP |
744 | if (lis3->irq) |
745 | free_irq(lis3->irq, lis3); | |
746 | if (lis3->pdata && lis3->pdata->irq2) | |
747 | free_irq(lis3->pdata->irq2, lis3); | |
92ba4fe4 | 748 | |
895c156c | 749 | if (!lis3->idev) |
455fbdd3 PM |
750 | return; |
751 | ||
895c156c ÉP |
752 | if (lis3->irq) |
753 | misc_deregister(&lis3->miscdev); | |
754 | input_unregister_polled_device(lis3->idev); | |
755 | input_free_polled_device(lis3->idev); | |
756 | lis3->idev = NULL; | |
455fbdd3 | 757 | } |
cfce41a6 | 758 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 759 | |
455fbdd3 | 760 | /* Sysfs stuff */ |
2a346996 SO |
761 | static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3) |
762 | { | |
763 | /* | |
764 | * SYSFS functions are fast visitors so put-call | |
765 | * immediately after the get-call. However, keep | |
766 | * chip running for a while and schedule delayed | |
767 | * suspend. This way periodic sysfs calls doesn't | |
768 | * suffer from relatively long power up time. | |
769 | */ | |
770 | ||
771 | if (lis3->pm_dev) { | |
772 | pm_runtime_get_sync(lis3->pm_dev); | |
773 | pm_runtime_put_noidle(lis3->pm_dev); | |
774 | pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY); | |
775 | } | |
776 | } | |
777 | ||
2db4a76d SO |
778 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
779 | struct device_attribute *attr, char *buf) | |
780 | { | |
895c156c | 781 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
2db4a76d SO |
782 | s16 values[3]; |
783 | ||
029756d0 SO |
784 | static const char ok[] = "OK"; |
785 | static const char fail[] = "FAIL"; | |
786 | static const char irq[] = "FAIL_IRQ"; | |
787 | const char *res; | |
788 | ||
895c156c ÉP |
789 | lis3lv02d_sysfs_poweron(lis3); |
790 | switch (lis3lv02d_selftest(lis3, values)) { | |
029756d0 SO |
791 | case SELFTEST_FAIL: |
792 | res = fail; | |
793 | break; | |
794 | case SELFTEST_IRQ: | |
795 | res = irq; | |
796 | break; | |
797 | case SELFTEST_OK: | |
798 | default: | |
799 | res = ok; | |
800 | break; | |
801 | } | |
802 | return sprintf(buf, "%s %d %d %d\n", res, | |
2db4a76d SO |
803 | values[0], values[1], values[2]); |
804 | } | |
805 | ||
455fbdd3 PM |
806 | static ssize_t lis3lv02d_position_show(struct device *dev, |
807 | struct device_attribute *attr, char *buf) | |
808 | { | |
895c156c | 809 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
455fbdd3 PM |
810 | int x, y, z; |
811 | ||
895c156c ÉP |
812 | lis3lv02d_sysfs_poweron(lis3); |
813 | mutex_lock(&lis3->mutex); | |
814 | lis3lv02d_get_xyz(lis3, &x, &y, &z); | |
815 | mutex_unlock(&lis3->mutex); | |
455fbdd3 PM |
816 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
817 | } | |
818 | ||
455fbdd3 PM |
819 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
820 | struct device_attribute *attr, char *buf) | |
821 | { | |
895c156c ÉP |
822 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
823 | ||
824 | lis3lv02d_sysfs_poweron(lis3); | |
825 | return sprintf(buf, "%d\n", lis3lv02d_get_odr(lis3)); | |
455fbdd3 PM |
826 | } |
827 | ||
a253aaef SO |
828 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
829 | struct device_attribute *attr, const char *buf, | |
830 | size_t count) | |
831 | { | |
895c156c | 832 | struct lis3lv02d *lis3 = dev_get_drvdata(dev); |
a253aaef | 833 | unsigned long rate; |
f7b41276 | 834 | int ret; |
a253aaef | 835 | |
f7b41276 JH |
836 | ret = kstrtoul(buf, 0, &rate); |
837 | if (ret) | |
838 | return ret; | |
a253aaef | 839 | |
895c156c ÉP |
840 | lis3lv02d_sysfs_poweron(lis3); |
841 | if (lis3lv02d_set_odr(lis3, rate)) | |
a253aaef SO |
842 | return -EINVAL; |
843 | ||
844 | return count; | |
845 | } | |
846 | ||
2db4a76d | 847 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 848 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
849 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
850 | lis3lv02d_rate_set); | |
455fbdd3 PM |
851 | |
852 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 853 | &dev_attr_selftest.attr, |
455fbdd3 | 854 | &dev_attr_position.attr, |
455fbdd3 PM |
855 | &dev_attr_rate.attr, |
856 | NULL | |
857 | }; | |
858 | ||
27c0823f | 859 | static const struct attribute_group lis3lv02d_attribute_group = { |
455fbdd3 PM |
860 | .attrs = lis3lv02d_attributes |
861 | }; | |
862 | ||
cfce41a6 | 863 | |
a38da2ed | 864 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 865 | { |
a002ee89 EP |
866 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
867 | if (IS_ERR(lis3->pdev)) | |
868 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 869 | |
895c156c | 870 | platform_set_drvdata(lis3->pdev, lis3); |
a002ee89 | 871 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
872 | } |
873 | ||
a002ee89 | 874 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 875 | { |
a002ee89 EP |
876 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
877 | platform_device_unregister(lis3->pdev); | |
2a346996 SO |
878 | if (lis3->pm_dev) { |
879 | /* Barrier after the sysfs remove */ | |
880 | pm_runtime_barrier(lis3->pm_dev); | |
881 | ||
882 | /* SYSFS may have left chip running. Turn off if necessary */ | |
883 | if (!pm_runtime_suspended(lis3->pm_dev)) | |
895c156c | 884 | lis3lv02d_poweroff(lis3); |
2a346996 SO |
885 | |
886 | pm_runtime_disable(lis3->pm_dev); | |
887 | pm_runtime_set_suspended(lis3->pm_dev); | |
888 | } | |
f9deb41f | 889 | kfree(lis3->reg_cache); |
455fbdd3 PM |
890 | return 0; |
891 | } | |
cfce41a6 | 892 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 893 | |
d7f81d42 | 894 | static void lis3lv02d_8b_configure(struct lis3lv02d *lis3, |
ecc437ae SO |
895 | struct lis3lv02d_platform_data *p) |
896 | { | |
92ba4fe4 | 897 | int err; |
342c5f12 SO |
898 | int ctrl2 = p->hipass_ctrl; |
899 | ||
ecc437ae | 900 | if (p->click_flags) { |
d7f81d42 ÉP |
901 | lis3->write(lis3, CLICK_CFG, p->click_flags); |
902 | lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit); | |
903 | lis3->write(lis3, CLICK_LATENCY, p->click_latency); | |
904 | lis3->write(lis3, CLICK_WINDOW, p->click_window); | |
905 | lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf); | |
906 | lis3->write(lis3, CLICK_THSY_X, | |
ecc437ae SO |
907 | (p->click_thresh_x & 0xf) | |
908 | (p->click_thresh_y << 4)); | |
6d94d408 | 909 | |
d7f81d42 | 910 | if (lis3->idev) { |
895c156c | 911 | struct input_dev *input_dev = lis3->idev->input; |
6d94d408 SO |
912 | input_set_capability(input_dev, EV_KEY, BTN_X); |
913 | input_set_capability(input_dev, EV_KEY, BTN_Y); | |
914 | input_set_capability(input_dev, EV_KEY, BTN_Z); | |
915 | } | |
ecc437ae SO |
916 | } |
917 | ||
918 | if (p->wakeup_flags) { | |
d7f81d42 ÉP |
919 | lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags); |
920 | lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
cc23aa1c | 921 | /* pdata value + 1 to keep this backward compatible*/ |
d7f81d42 | 922 | lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1); |
342c5f12 SO |
923 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
924 | } | |
925 | ||
926 | if (p->wakeup_flags2) { | |
d7f81d42 ÉP |
927 | lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2); |
928 | lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); | |
cc23aa1c | 929 | /* pdata value + 1 to keep this backward compatible*/ |
d7f81d42 | 930 | lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1); |
342c5f12 | 931 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
ecc437ae | 932 | } |
342c5f12 | 933 | /* Configure hipass filters */ |
d7f81d42 | 934 | lis3->write(lis3, CTRL_REG2, ctrl2); |
92ba4fe4 SO |
935 | |
936 | if (p->irq2) { | |
937 | err = request_threaded_irq(p->irq2, | |
938 | NULL, | |
939 | lis302dl_interrupt_thread2_8b, | |
cc23aa1c SO |
940 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
941 | (p->irq_flags2 & IRQF_TRIGGER_MASK), | |
895c156c | 942 | DRIVER_NAME, lis3); |
92ba4fe4 | 943 | if (err < 0) |
63366d37 | 944 | pr_err("No second IRQ. Limited functionality\n"); |
92ba4fe4 | 945 | } |
ecc437ae SO |
946 | } |
947 | ||
cbac1a8b | 948 | #ifdef CONFIG_OF |
0c83adba | 949 | int lis3lv02d_init_dt(struct lis3lv02d *lis3) |
cbac1a8b DM |
950 | { |
951 | struct lis3lv02d_platform_data *pdata; | |
952 | struct device_node *np = lis3->of_node; | |
953 | u32 val; | |
cdcd6f82 | 954 | s32 sval; |
cbac1a8b DM |
955 | |
956 | if (!lis3->of_node) | |
957 | return 0; | |
958 | ||
959 | pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); | |
960 | if (!pdata) | |
961 | return -ENOMEM; | |
962 | ||
963 | if (of_get_property(np, "st,click-single-x", NULL)) | |
964 | pdata->click_flags |= LIS3_CLICK_SINGLE_X; | |
965 | if (of_get_property(np, "st,click-double-x", NULL)) | |
966 | pdata->click_flags |= LIS3_CLICK_DOUBLE_X; | |
967 | ||
968 | if (of_get_property(np, "st,click-single-y", NULL)) | |
969 | pdata->click_flags |= LIS3_CLICK_SINGLE_Y; | |
970 | if (of_get_property(np, "st,click-double-y", NULL)) | |
971 | pdata->click_flags |= LIS3_CLICK_DOUBLE_Y; | |
972 | ||
973 | if (of_get_property(np, "st,click-single-z", NULL)) | |
974 | pdata->click_flags |= LIS3_CLICK_SINGLE_Z; | |
975 | if (of_get_property(np, "st,click-double-z", NULL)) | |
976 | pdata->click_flags |= LIS3_CLICK_DOUBLE_Z; | |
977 | ||
978 | if (!of_property_read_u32(np, "st,click-threshold-x", &val)) | |
979 | pdata->click_thresh_x = val; | |
980 | if (!of_property_read_u32(np, "st,click-threshold-y", &val)) | |
981 | pdata->click_thresh_y = val; | |
982 | if (!of_property_read_u32(np, "st,click-threshold-z", &val)) | |
983 | pdata->click_thresh_z = val; | |
984 | ||
985 | if (!of_property_read_u32(np, "st,click-time-limit", &val)) | |
986 | pdata->click_time_limit = val; | |
987 | if (!of_property_read_u32(np, "st,click-latency", &val)) | |
988 | pdata->click_latency = val; | |
989 | if (!of_property_read_u32(np, "st,click-window", &val)) | |
990 | pdata->click_window = val; | |
991 | ||
992 | if (of_get_property(np, "st,irq1-disable", NULL)) | |
993 | pdata->irq_cfg |= LIS3_IRQ1_DISABLE; | |
994 | if (of_get_property(np, "st,irq1-ff-wu-1", NULL)) | |
995 | pdata->irq_cfg |= LIS3_IRQ1_FF_WU_1; | |
996 | if (of_get_property(np, "st,irq1-ff-wu-2", NULL)) | |
997 | pdata->irq_cfg |= LIS3_IRQ1_FF_WU_2; | |
998 | if (of_get_property(np, "st,irq1-data-ready", NULL)) | |
999 | pdata->irq_cfg |= LIS3_IRQ1_DATA_READY; | |
1000 | if (of_get_property(np, "st,irq1-click", NULL)) | |
1001 | pdata->irq_cfg |= LIS3_IRQ1_CLICK; | |
1002 | ||
1003 | if (of_get_property(np, "st,irq2-disable", NULL)) | |
1004 | pdata->irq_cfg |= LIS3_IRQ2_DISABLE; | |
1005 | if (of_get_property(np, "st,irq2-ff-wu-1", NULL)) | |
1006 | pdata->irq_cfg |= LIS3_IRQ2_FF_WU_1; | |
1007 | if (of_get_property(np, "st,irq2-ff-wu-2", NULL)) | |
1008 | pdata->irq_cfg |= LIS3_IRQ2_FF_WU_2; | |
1009 | if (of_get_property(np, "st,irq2-data-ready", NULL)) | |
1010 | pdata->irq_cfg |= LIS3_IRQ2_DATA_READY; | |
1011 | if (of_get_property(np, "st,irq2-click", NULL)) | |
1012 | pdata->irq_cfg |= LIS3_IRQ2_CLICK; | |
1013 | ||
1014 | if (of_get_property(np, "st,irq-open-drain", NULL)) | |
1015 | pdata->irq_cfg |= LIS3_IRQ_OPEN_DRAIN; | |
1016 | if (of_get_property(np, "st,irq-active-low", NULL)) | |
1017 | pdata->irq_cfg |= LIS3_IRQ_ACTIVE_LOW; | |
1018 | ||
1019 | if (!of_property_read_u32(np, "st,wu-duration-1", &val)) | |
1020 | pdata->duration1 = val; | |
1021 | if (!of_property_read_u32(np, "st,wu-duration-2", &val)) | |
1022 | pdata->duration2 = val; | |
1023 | ||
1024 | if (of_get_property(np, "st,wakeup-x-lo", NULL)) | |
1025 | pdata->wakeup_flags |= LIS3_WAKEUP_X_LO; | |
1026 | if (of_get_property(np, "st,wakeup-x-hi", NULL)) | |
1027 | pdata->wakeup_flags |= LIS3_WAKEUP_X_HI; | |
1028 | if (of_get_property(np, "st,wakeup-y-lo", NULL)) | |
1029 | pdata->wakeup_flags |= LIS3_WAKEUP_Y_LO; | |
1030 | if (of_get_property(np, "st,wakeup-y-hi", NULL)) | |
1031 | pdata->wakeup_flags |= LIS3_WAKEUP_Y_HI; | |
1032 | if (of_get_property(np, "st,wakeup-z-lo", NULL)) | |
1033 | pdata->wakeup_flags |= LIS3_WAKEUP_Z_LO; | |
1034 | if (of_get_property(np, "st,wakeup-z-hi", NULL)) | |
1035 | pdata->wakeup_flags |= LIS3_WAKEUP_Z_HI; | |
c5131a37 SR |
1036 | if (of_get_property(np, "st,wakeup-threshold", &val)) |
1037 | pdata->wakeup_thresh = val; | |
1038 | ||
1039 | if (of_get_property(np, "st,wakeup2-x-lo", NULL)) | |
1040 | pdata->wakeup_flags2 |= LIS3_WAKEUP_X_LO; | |
1041 | if (of_get_property(np, "st,wakeup2-x-hi", NULL)) | |
1042 | pdata->wakeup_flags2 |= LIS3_WAKEUP_X_HI; | |
1043 | if (of_get_property(np, "st,wakeup2-y-lo", NULL)) | |
1044 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_LO; | |
1045 | if (of_get_property(np, "st,wakeup2-y-hi", NULL)) | |
1046 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Y_HI; | |
1047 | if (of_get_property(np, "st,wakeup2-z-lo", NULL)) | |
1048 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_LO; | |
1049 | if (of_get_property(np, "st,wakeup2-z-hi", NULL)) | |
1050 | pdata->wakeup_flags2 |= LIS3_WAKEUP_Z_HI; | |
1051 | if (of_get_property(np, "st,wakeup2-threshold", &val)) | |
1052 | pdata->wakeup_thresh2 = val; | |
cbac1a8b DM |
1053 | |
1054 | if (!of_property_read_u32(np, "st,highpass-cutoff-hz", &val)) { | |
1055 | switch (val) { | |
1056 | case 1: | |
1057 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_1HZ; | |
1058 | break; | |
1059 | case 2: | |
1060 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_2HZ; | |
1061 | break; | |
1062 | case 4: | |
1063 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_4HZ; | |
1064 | break; | |
1065 | case 8: | |
1066 | pdata->hipass_ctrl = LIS3_HIPASS_CUTFF_8HZ; | |
1067 | break; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | if (of_get_property(np, "st,hipass1-disable", NULL)) | |
1072 | pdata->hipass_ctrl |= LIS3_HIPASS1_DISABLE; | |
1073 | if (of_get_property(np, "st,hipass2-disable", NULL)) | |
1074 | pdata->hipass_ctrl |= LIS3_HIPASS2_DISABLE; | |
1075 | ||
cdcd6f82 SR |
1076 | if (of_property_read_s32(np, "st,axis-x", &sval) == 0) |
1077 | pdata->axis_x = sval; | |
1078 | if (of_property_read_s32(np, "st,axis-y", &sval) == 0) | |
1079 | pdata->axis_y = sval; | |
1080 | if (of_property_read_s32(np, "st,axis-z", &sval) == 0) | |
1081 | pdata->axis_z = sval; | |
cbac1a8b DM |
1082 | |
1083 | if (of_get_property(np, "st,default-rate", NULL)) | |
1084 | pdata->default_rate = val; | |
1085 | ||
cdcd6f82 SR |
1086 | if (of_property_read_s32(np, "st,min-limit-x", &sval) == 0) |
1087 | pdata->st_min_limits[0] = sval; | |
1088 | if (of_property_read_s32(np, "st,min-limit-y", &sval) == 0) | |
1089 | pdata->st_min_limits[1] = sval; | |
1090 | if (of_property_read_s32(np, "st,min-limit-z", &sval) == 0) | |
1091 | pdata->st_min_limits[2] = sval; | |
1092 | ||
1093 | if (of_property_read_s32(np, "st,max-limit-x", &sval) == 0) | |
1094 | pdata->st_max_limits[0] = sval; | |
1095 | if (of_property_read_s32(np, "st,max-limit-y", &sval) == 0) | |
1096 | pdata->st_max_limits[1] = sval; | |
1097 | if (of_property_read_s32(np, "st,max-limit-z", &sval) == 0) | |
1098 | pdata->st_max_limits[2] = sval; | |
cbac1a8b DM |
1099 | |
1100 | ||
1101 | lis3->pdata = pdata; | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | #else | |
0c83adba | 1107 | int lis3lv02d_init_dt(struct lis3lv02d *lis3) |
cbac1a8b DM |
1108 | { |
1109 | return 0; | |
1110 | } | |
1111 | #endif | |
1112 | EXPORT_SYMBOL_GPL(lis3lv02d_init_dt); | |
1113 | ||
ab337a63 DM |
1114 | /* |
1115 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 1116 | * Should be rather independent of the bus system. |
ab337a63 | 1117 | */ |
d7f81d42 | 1118 | int lis3lv02d_init_device(struct lis3lv02d *lis3) |
ab337a63 | 1119 | { |
92ba4fe4 SO |
1120 | int err; |
1121 | irq_handler_t thread_fn; | |
cc23aa1c | 1122 | int irq_flags = 0; |
92ba4fe4 | 1123 | |
d7f81d42 | 1124 | lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I); |
a38da2ed | 1125 | |
d7f81d42 | 1126 | switch (lis3->whoami) { |
bc62c147 | 1127 | case WAI_12B: |
63366d37 | 1128 | pr_info("12 bits sensor found\n"); |
d7f81d42 ÉP |
1129 | lis3->read_data = lis3lv02d_read_12; |
1130 | lis3->mdps_max_val = 2048; | |
1131 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; | |
1132 | lis3->odrs = lis3_12_rates; | |
1133 | lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
1134 | lis3->scale = LIS3_SENSITIVITY_12B; | |
1135 | lis3->regs = lis3_wai12_regs; | |
1136 | lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs); | |
a38da2ed | 1137 | break; |
bc62c147 | 1138 | case WAI_8B: |
63366d37 | 1139 | pr_info("8 bits sensor found\n"); |
d7f81d42 ÉP |
1140 | lis3->read_data = lis3lv02d_read_8; |
1141 | lis3->mdps_max_val = 128; | |
1142 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
1143 | lis3->odrs = lis3_8_rates; | |
1144 | lis3->odr_mask = CTRL1_DR; | |
1145 | lis3->scale = LIS3_SENSITIVITY_8B; | |
1146 | lis3->regs = lis3_wai8_regs; | |
1147 | lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs); | |
a38da2ed | 1148 | break; |
78537c3b | 1149 | case WAI_3DC: |
63366d37 | 1150 | pr_info("8 bits 3DC sensor found\n"); |
d7f81d42 ÉP |
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_3dc_rates; | |
1155 | lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; | |
1156 | lis3->scale = LIS3_SENSITIVITY_8B; | |
78537c3b | 1157 | break; |
0bf5a8be | 1158 | case WAI_3DLH: |
e2b2ed83 AC |
1159 | pr_info("16 bits lis331dlh sensor found\n"); |
1160 | lis3->read_data = lis331dlh_read_data; | |
0bf5a8be AC |
1161 | lis3->mdps_max_val = 2048; /* 12 bits for 2G */ |
1162 | lis3->shift_adj = SHIFT_ADJ_2G; | |
1163 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
1164 | lis3->odrs = lis3_3dlh_rates; | |
1165 | lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1; | |
1166 | lis3->scale = LIS3DLH_SENSITIVITY_2G; | |
1167 | break; | |
a38da2ed | 1168 | default: |
d7f81d42 | 1169 | pr_err("unknown sensor type 0x%X\n", lis3->whoami); |
a38da2ed DM |
1170 | return -EINVAL; |
1171 | } | |
1172 | ||
d7f81d42 | 1173 | lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
f9deb41f SO |
1174 | sizeof(lis3_wai12_regs)), GFP_KERNEL); |
1175 | ||
d7f81d42 | 1176 | if (lis3->reg_cache == NULL) { |
f9deb41f SO |
1177 | printk(KERN_ERR DRIVER_NAME "out of memory\n"); |
1178 | return -ENOMEM; | |
1179 | } | |
1180 | ||
d7f81d42 ÉP |
1181 | mutex_init(&lis3->mutex); |
1182 | atomic_set(&lis3->wake_thread, 0); | |
2db4a76d | 1183 | |
d7f81d42 ÉP |
1184 | lis3lv02d_add_fs(lis3); |
1185 | err = lis3lv02d_poweron(lis3); | |
1510dd59 | 1186 | if (err) { |
d7f81d42 | 1187 | lis3lv02d_remove_fs(lis3); |
1510dd59 ÉP |
1188 | return err; |
1189 | } | |
ab337a63 | 1190 | |
d7f81d42 ÉP |
1191 | if (lis3->pm_dev) { |
1192 | pm_runtime_set_active(lis3->pm_dev); | |
1193 | pm_runtime_enable(lis3->pm_dev); | |
2a346996 SO |
1194 | } |
1195 | ||
e1e5687d | 1196 | if (lis3lv02d_joystick_enable(lis3)) |
63366d37 | 1197 | pr_err("joystick initialization failed\n"); |
ab337a63 | 1198 | |
8f3128e7 DM |
1199 | /* passing in platform specific data is purely optional and only |
1200 | * used by the SPI transport layer at the moment */ | |
d7f81d42 ÉP |
1201 | if (lis3->pdata) { |
1202 | struct lis3lv02d_platform_data *p = lis3->pdata; | |
8f3128e7 | 1203 | |
d7f81d42 ÉP |
1204 | if (lis3->whoami == WAI_8B) |
1205 | lis3lv02d_8b_configure(lis3, p); | |
8873c334 | 1206 | |
cc23aa1c SO |
1207 | irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
1208 | ||
d7f81d42 | 1209 | lis3->irq_cfg = p->irq_cfg; |
8f3128e7 | 1210 | if (p->irq_cfg) |
d7f81d42 | 1211 | lis3->write(lis3, CTRL_REG3, p->irq_cfg); |
cc23aa1c SO |
1212 | |
1213 | if (p->default_rate) | |
895c156c | 1214 | lis3lv02d_set_odr(lis3, p->default_rate); |
8f3128e7 DM |
1215 | } |
1216 | ||
a38da2ed | 1217 | /* bail if we did not get an IRQ from the bus layer */ |
d7f81d42 | 1218 | if (!lis3->irq) { |
a20f0bc1 | 1219 | pr_debug("No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
1220 | goto out; |
1221 | } | |
1222 | ||
92ba4fe4 SO |
1223 | /* |
1224 | * The sensor can generate interrupts for free-fall and direction | |
1225 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
1226 | * the things simple and _fast_ we activate it only for free-fall, so | |
1227 | * no need to read register (very slow with ACPI). For the same reason, | |
1228 | * we forbid shared interrupts. | |
1229 | * | |
1230 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
1231 | * io-apic is not configurable (and generates a warning) but I keep it | |
1232 | * in case of support for other hardware. | |
1233 | */ | |
d7f81d42 | 1234 | if (lis3->pdata && lis3->whoami == WAI_8B) |
92ba4fe4 SO |
1235 | thread_fn = lis302dl_interrupt_thread1_8b; |
1236 | else | |
1237 | thread_fn = NULL; | |
1238 | ||
d7f81d42 | 1239 | err = request_threaded_irq(lis3->irq, lis302dl_interrupt, |
92ba4fe4 | 1240 | thread_fn, |
cc23aa1c SO |
1241 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
1242 | irq_flags, | |
895c156c | 1243 | DRIVER_NAME, lis3); |
92ba4fe4 SO |
1244 | |
1245 | if (err < 0) { | |
63366d37 | 1246 | pr_err("Cannot get IRQ\n"); |
92ba4fe4 SO |
1247 | goto out; |
1248 | } | |
1249 | ||
895c156c ÉP |
1250 | lis3->miscdev.minor = MISC_DYNAMIC_MINOR; |
1251 | lis3->miscdev.name = "freefall"; | |
1252 | lis3->miscdev.fops = &lis3lv02d_misc_fops; | |
1253 | ||
1254 | if (misc_register(&lis3->miscdev)) | |
63366d37 | 1255 | pr_err("misc_register failed\n"); |
ab337a63 | 1256 | out: |
ab337a63 DM |
1257 | return 0; |
1258 | } | |
1259 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
1260 | ||
455fbdd3 | 1261 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 1262 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 1263 | MODULE_LICENSE("GPL"); |