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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 PM |
25 | #include <linux/kernel.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/dmi.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/interrupt.h> | |
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> |
455fbdd3 PM |
42 | #include "lis3lv02d.h" |
43 | ||
44 | #define DRIVER_NAME "lis3lv02d" | |
455fbdd3 PM |
45 | |
46 | /* joystick device poll interval in milliseconds */ | |
47 | #define MDPS_POLL_INTERVAL 50 | |
4a70a413 SO |
48 | #define MDPS_POLL_MIN 0 |
49 | #define MDPS_POLL_MAX 2000 | |
2a346996 SO |
50 | |
51 | #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */ | |
52 | ||
029756d0 SO |
53 | #define SELFTEST_OK 0 |
54 | #define SELFTEST_FAIL -1 | |
55 | #define SELFTEST_IRQ -2 | |
56 | ||
57 | #define IRQ_LINE0 0 | |
58 | #define IRQ_LINE1 1 | |
59 | ||
455fbdd3 PM |
60 | /* |
61 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
bc62c147 | 62 | * because they are generated even if the data do not change. So it's better |
455fbdd3 PM |
63 | * to keep the interrupt for the free-fall event. The values are updated at |
64 | * 40Hz (at the lowest frequency), but as it can be pretty time consuming on | |
65 | * some low processor, we poll the sensor only at 20Hz... enough for the | |
66 | * joystick. | |
67 | */ | |
68 | ||
641615ab SO |
69 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
70 | #define LIS3_PWRON_DELAY_WAI_8B (3000) | |
71 | ||
32496c76 SO |
72 | /* |
73 | * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG | |
74 | * LIS302D spec says: 18 mG / digit | |
75 | * LIS3_ACCURACY is used to increase accuracy of the intermediate | |
76 | * calculation results. | |
77 | */ | |
78 | #define LIS3_ACCURACY 1024 | |
79 | /* Sensitivity values for -2G +2G scale */ | |
80 | #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) | |
81 | #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) | |
82 | ||
0bf5a8be | 83 | /* |
e2b2ed83 AC |
84 | * LIS331DLH spec says 1LSBs corresponds 4G/4096 -> 1LSB is 1000/1024 mG. |
85 | * Below macros defines sensitivity values for +/-2G. Dataout bits for | |
86 | * +/-2G range is 12 bits so 4 bits adjustment must be done to get 12bit | |
87 | * data from 16bit value. Currently this driver supports only 2G range. | |
0bf5a8be AC |
88 | */ |
89 | #define LIS3DLH_SENSITIVITY_2G ((LIS3_ACCURACY * 1000) / 1024) | |
90 | #define SHIFT_ADJ_2G 4 | |
91 | ||
477bc918 SO |
92 | #define LIS3_DEFAULT_FUZZ_12B 3 |
93 | #define LIS3_DEFAULT_FLAT_12B 3 | |
94 | #define LIS3_DEFAULT_FUZZ_8B 1 | |
95 | #define LIS3_DEFAULT_FLAT_8B 1 | |
32496c76 | 96 | |
a38da2ed | 97 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 98 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 | 99 | }; |
be84cfc5 | 100 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 101 | |
2ee32144 TI |
102 | /* just like param_set_int() but does sanity-check so that it won't point |
103 | * over the axis array size | |
104 | */ | |
105 | static int param_set_axis(const char *val, const struct kernel_param *kp) | |
106 | { | |
107 | int ret = param_set_int(val, kp); | |
108 | if (!ret) { | |
109 | int val = *(int *)kp->arg; | |
110 | if (val < 0) | |
111 | val = -val; | |
112 | if (!val || val > 3) | |
113 | return -EINVAL; | |
114 | } | |
115 | return ret; | |
116 | } | |
117 | ||
118 | static struct kernel_param_ops param_ops_axis = { | |
119 | .set = param_set_axis, | |
120 | .get = param_get_int, | |
121 | }; | |
122 | ||
bafeafea RR |
123 | #define param_check_axis(name, p) param_check_int(name, p) |
124 | ||
2ee32144 TI |
125 | module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644); |
126 | MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions"); | |
127 | ||
a38da2ed DM |
128 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
129 | { | |
130 | s8 lo; | |
131 | if (lis3->read(lis3, reg, &lo) < 0) | |
132 | return 0; | |
133 | ||
134 | return lo; | |
135 | } | |
136 | ||
bc62c147 | 137 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
138 | { |
139 | u8 lo, hi; | |
140 | ||
a38da2ed DM |
141 | lis3->read(lis3, reg - 1, &lo); |
142 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
143 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
144 | return (s16)((hi << 8) | lo); | |
145 | } | |
146 | ||
0bf5a8be | 147 | /* 12bits for 2G range, 13 bits for 4G range and 14 bits for 8G range */ |
e2b2ed83 | 148 | static s16 lis331dlh_read_data(struct lis3lv02d *lis3, int reg) |
0bf5a8be AC |
149 | { |
150 | u8 lo, hi; | |
151 | int v; | |
152 | ||
153 | lis3->read(lis3, reg - 1, &lo); | |
154 | lis3->read(lis3, reg, &hi); | |
155 | v = (int) ((hi << 8) | lo); | |
156 | ||
157 | return (s16) v >> lis3->shift_adj; | |
158 | } | |
159 | ||
455fbdd3 PM |
160 | /** |
161 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
162 | * @axis: 1,2,3 - can also be negative | |
163 | * @hw_values: raw values returned by the hardware | |
164 | * | |
165 | * Returns the converted value. | |
166 | */ | |
167 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
168 | { | |
169 | if (axis > 0) | |
170 | return hw_values[axis - 1]; | |
171 | else | |
172 | return -hw_values[-axis - 1]; | |
173 | } | |
174 | ||
175 | /** | |
176 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
177 | * @lis3: pointer to the device struct |
178 | * @x: where to store the X axis value | |
179 | * @y: where to store the Y axis value | |
180 | * @z: where to store the Z axis value | |
455fbdd3 PM |
181 | * |
182 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
183 | */ | |
a38da2ed | 184 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
185 | { |
186 | int position[3]; | |
32496c76 | 187 | int i; |
455fbdd3 | 188 | |
f10a5407 | 189 | if (lis3->blkread) { |
895c156c | 190 | if (lis3->whoami == WAI_12B) { |
f10a5407 SO |
191 | u16 data[3]; |
192 | lis3->blkread(lis3, OUTX_L, 6, (u8 *)data); | |
193 | for (i = 0; i < 3; i++) | |
194 | position[i] = (s16)le16_to_cpu(data[i]); | |
195 | } else { | |
196 | u8 data[5]; | |
197 | /* Data: x, dummy, y, dummy, z */ | |
198 | lis3->blkread(lis3, OUTX, 5, data); | |
199 | for (i = 0; i < 3; i++) | |
200 | position[i] = (s8)data[i * 2]; | |
201 | } | |
202 | } else { | |
203 | position[0] = lis3->read_data(lis3, OUTX); | |
204 | position[1] = lis3->read_data(lis3, OUTY); | |
205 | position[2] = lis3->read_data(lis3, OUTZ); | |
206 | } | |
455fbdd3 | 207 | |
32496c76 SO |
208 | for (i = 0; i < 3; i++) |
209 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; | |
210 | ||
a002ee89 EP |
211 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
212 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
213 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
214 | } |
215 | ||
641615ab SO |
216 | /* conversion btw sampling rate and the register values */ |
217 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; | |
218 | static int lis3_8_rates[2] = {100, 400}; | |
78537c3b | 219 | static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
0bf5a8be | 220 | static int lis3_3dlh_rates[4] = {50, 100, 400, 1000}; |
641615ab | 221 | |
a253aaef | 222 | /* ODR is Output Data Rate */ |
895c156c | 223 | static int lis3lv02d_get_odr(struct lis3lv02d *lis3) |
641615ab SO |
224 | { |
225 | u8 ctrl; | |
a253aaef | 226 | int shift; |
641615ab | 227 | |
895c156c ÉP |
228 | lis3->read(lis3, CTRL_REG1, &ctrl); |
229 | ctrl &= lis3->odr_mask; | |
230 | shift = ffs(lis3->odr_mask) - 1; | |
231 | return lis3->odrs[(ctrl >> shift)]; | |
a253aaef | 232 | } |
641615ab | 233 | |
1510dd59 ÉP |
234 | static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) |
235 | { | |
895c156c | 236 | int div = lis3lv02d_get_odr(lis3); |
1510dd59 ÉP |
237 | |
238 | if (WARN_ONCE(div == 0, "device returned spurious data")) | |
239 | return -ENXIO; | |
240 | ||
241 | /* LIS3 power on delay is quite long */ | |
242 | msleep(lis3->pwron_delay / div); | |
243 | return 0; | |
244 | } | |
245 | ||
895c156c | 246 | static int lis3lv02d_set_odr(struct lis3lv02d *lis3, int rate) |
a253aaef SO |
247 | { |
248 | u8 ctrl; | |
249 | int i, len, shift; | |
250 | ||
78537c3b TI |
251 | if (!rate) |
252 | return -EINVAL; | |
253 | ||
895c156c ÉP |
254 | lis3->read(lis3, CTRL_REG1, &ctrl); |
255 | ctrl &= ~lis3->odr_mask; | |
256 | len = 1 << hweight_long(lis3->odr_mask); /* # of possible values */ | |
257 | shift = ffs(lis3->odr_mask) - 1; | |
a253aaef SO |
258 | |
259 | for (i = 0; i < len; i++) | |
895c156c ÉP |
260 | if (lis3->odrs[i] == rate) { |
261 | lis3->write(lis3, CTRL_REG1, | |
a253aaef SO |
262 | ctrl | (i << shift)); |
263 | return 0; | |
264 | } | |
265 | return -EINVAL; | |
641615ab SO |
266 | } |
267 | ||
2db4a76d SO |
268 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
269 | { | |
78537c3b | 270 | u8 ctlreg, reg; |
2db4a76d SO |
271 | s16 x, y, z; |
272 | u8 selftest; | |
273 | int ret; | |
029756d0 SO |
274 | u8 ctrl_reg_data; |
275 | unsigned char irq_cfg; | |
2db4a76d SO |
276 | |
277 | mutex_lock(&lis3->mutex); | |
029756d0 SO |
278 | |
279 | irq_cfg = lis3->irq_cfg; | |
895c156c | 280 | if (lis3->whoami == WAI_8B) { |
029756d0 SO |
281 | lis3->data_ready_count[IRQ_LINE0] = 0; |
282 | lis3->data_ready_count[IRQ_LINE1] = 0; | |
283 | ||
284 | /* Change interrupt cfg to data ready for selftest */ | |
895c156c | 285 | atomic_inc(&lis3->wake_thread); |
029756d0 SO |
286 | lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; |
287 | lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); | |
288 | lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & | |
289 | ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | | |
290 | (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); | |
291 | } | |
292 | ||
0bf5a8be | 293 | if ((lis3->whoami == WAI_3DC) || (lis3->whoami == WAI_3DLH)) { |
78537c3b TI |
294 | ctlreg = CTRL_REG4; |
295 | selftest = CTRL4_ST0; | |
296 | } else { | |
297 | ctlreg = CTRL_REG1; | |
895c156c | 298 | if (lis3->whoami == WAI_12B) |
78537c3b TI |
299 | selftest = CTRL1_ST; |
300 | else | |
301 | selftest = CTRL1_STP; | |
302 | } | |
2db4a76d | 303 | |
78537c3b TI |
304 | lis3->read(lis3, ctlreg, ®); |
305 | lis3->write(lis3, ctlreg, (reg | selftest)); | |
1510dd59 ÉP |
306 | ret = lis3lv02d_get_pwron_wait(lis3); |
307 | if (ret) | |
308 | goto fail; | |
2db4a76d SO |
309 | |
310 | /* Read directly to avoid axis remap */ | |
311 | x = lis3->read_data(lis3, OUTX); | |
312 | y = lis3->read_data(lis3, OUTY); | |
313 | z = lis3->read_data(lis3, OUTZ); | |
314 | ||
315 | /* back to normal settings */ | |
78537c3b | 316 | lis3->write(lis3, ctlreg, reg); |
1510dd59 ÉP |
317 | ret = lis3lv02d_get_pwron_wait(lis3); |
318 | if (ret) | |
319 | goto fail; | |
2db4a76d SO |
320 | |
321 | results[0] = x - lis3->read_data(lis3, OUTX); | |
322 | results[1] = y - lis3->read_data(lis3, OUTY); | |
323 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
324 | ||
325 | ret = 0; | |
029756d0 | 326 | |
895c156c | 327 | if (lis3->whoami == WAI_8B) { |
029756d0 | 328 | /* Restore original interrupt configuration */ |
895c156c | 329 | atomic_dec(&lis3->wake_thread); |
029756d0 SO |
330 | lis3->write(lis3, CTRL_REG3, ctrl_reg_data); |
331 | lis3->irq_cfg = irq_cfg; | |
332 | ||
333 | if ((irq_cfg & LIS3_IRQ1_MASK) && | |
334 | lis3->data_ready_count[IRQ_LINE0] < 2) { | |
335 | ret = SELFTEST_IRQ; | |
336 | goto fail; | |
337 | } | |
338 | ||
339 | if ((irq_cfg & LIS3_IRQ2_MASK) && | |
340 | lis3->data_ready_count[IRQ_LINE1] < 2) { | |
341 | ret = SELFTEST_IRQ; | |
342 | goto fail; | |
343 | } | |
344 | } | |
345 | ||
2db4a76d SO |
346 | if (lis3->pdata) { |
347 | int i; | |
348 | for (i = 0; i < 3; i++) { | |
349 | /* Check against selftest acceptance limits */ | |
350 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
351 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
029756d0 | 352 | ret = SELFTEST_FAIL; |
2db4a76d SO |
353 | goto fail; |
354 | } | |
355 | } | |
356 | } | |
357 | ||
358 | /* test passed */ | |
359 | fail: | |
360 | mutex_unlock(&lis3->mutex); | |
361 | return ret; | |
362 | } | |
363 | ||
f9deb41f SO |
364 | /* |
365 | * Order of registers in the list affects to order of the restore process. | |
366 | * Perhaps it is a good idea to set interrupt enable register as a last one | |
367 | * after all other configurations | |
368 | */ | |
369 | static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, | |
370 | FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, | |
371 | CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, | |
372 | CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, | |
373 | CTRL_REG1, CTRL_REG2, CTRL_REG3}; | |
374 | ||
375 | static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, | |
376 | FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, | |
377 | DD_THSE_L, DD_THSE_H, | |
378 | CTRL_REG1, CTRL_REG3, CTRL_REG2}; | |
379 | ||
380 | static inline void lis3_context_save(struct lis3lv02d *lis3) | |
381 | { | |
382 | int i; | |
383 | for (i = 0; i < lis3->regs_size; i++) | |
384 | lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); | |
385 | lis3->regs_stored = true; | |
386 | } | |
387 | ||
388 | static inline void lis3_context_restore(struct lis3lv02d *lis3) | |
389 | { | |
390 | int i; | |
391 | if (lis3->regs_stored) | |
392 | for (i = 0; i < lis3->regs_size; i++) | |
393 | lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); | |
394 | } | |
395 | ||
a38da2ed | 396 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 397 | { |
f9deb41f SO |
398 | if (lis3->reg_ctrl) |
399 | lis3_context_save(lis3); | |
a002ee89 EP |
400 | /* disable X,Y,Z axis and power down */ |
401 | lis3->write(lis3, CTRL_REG1, 0x00); | |
f9deb41f SO |
402 | if (lis3->reg_ctrl) |
403 | lis3->reg_ctrl(lis3, LIS3_REG_OFF); | |
455fbdd3 | 404 | } |
cfce41a6 | 405 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 406 | |
1510dd59 | 407 | int lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 408 | { |
1510dd59 | 409 | int err; |
a002ee89 | 410 | u8 reg; |
455fbdd3 | 411 | |
a002ee89 | 412 | lis3->init(lis3); |
455fbdd3 | 413 | |
a002ee89 EP |
414 | /* |
415 | * Common configuration | |
4b5d95b3 ÉP |
416 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
417 | * both have been read. So the value read will always be correct. | |
2a7fade7 | 418 | * Set BOOT bit to refresh factory tuning values. |
a002ee89 | 419 | */ |
05faadcf TI |
420 | if (lis3->pdata) { |
421 | lis3->read(lis3, CTRL_REG2, ®); | |
422 | if (lis3->whoami == WAI_12B) | |
423 | reg |= CTRL2_BDU | CTRL2_BOOT; | |
0bf5a8be AC |
424 | else if (lis3->whoami == WAI_3DLH) |
425 | reg |= CTRL2_BOOT_3DLH; | |
05faadcf TI |
426 | else |
427 | reg |= CTRL2_BOOT_8B; | |
428 | lis3->write(lis3, CTRL_REG2, reg); | |
0bf5a8be AC |
429 | |
430 | if (lis3->whoami == WAI_3DLH) { | |
431 | lis3->read(lis3, CTRL_REG4, ®); | |
432 | reg |= CTRL4_BDU; | |
433 | lis3->write(lis3, CTRL_REG4, reg); | |
434 | } | |
05faadcf | 435 | } |
2a7fade7 | 436 | |
1510dd59 ÉP |
437 | err = lis3lv02d_get_pwron_wait(lis3); |
438 | if (err) | |
439 | return err; | |
2a7fade7 | 440 | |
f9deb41f SO |
441 | if (lis3->reg_ctrl) |
442 | lis3_context_restore(lis3); | |
1510dd59 ÉP |
443 | |
444 | return 0; | |
455fbdd3 | 445 | } |
a002ee89 EP |
446 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
447 | ||
455fbdd3 | 448 | |
6d94d408 SO |
449 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
450 | { | |
895c156c | 451 | struct lis3lv02d *lis3 = pidev->private; |
6d94d408 SO |
452 | int x, y, z; |
453 | ||
895c156c ÉP |
454 | mutex_lock(&lis3->mutex); |
455 | lis3lv02d_get_xyz(lis3, &x, &y, &z); | |
6d94d408 SO |
456 | input_report_abs(pidev->input, ABS_X, x); |
457 | input_report_abs(pidev->input, ABS_Y, y); | |
458 | input_report_abs(pidev->input, ABS_Z, z); | |
459 | input_sync(pidev->input); | |
895c156c | 460 | mutex_unlock(&lis3->mutex); |
6d94d408 SO |
461 | } |
462 | ||
2a346996 SO |
463 | static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) |
464 | { | |
895c156c | 465 | struct lis3lv02d *lis3 = pidev->private; |
e726111f | 466 | |
895c156c ÉP |
467 | if (lis3->pm_dev) |
468 | pm_runtime_get_sync(lis3->pm_dev); | |
469 | ||
470 | if (lis3->pdata && lis3->whoami == WAI_8B && lis3->idev) | |
471 | atomic_set(&lis3->wake_thread, 1); | |
821f6646 SO |
472 | /* |
473 | * Update coordinates for the case where poll interval is 0 and | |
474 | * the chip in running purely under interrupt control | |
475 | */ | |
476 | lis3lv02d_joystick_poll(pidev); | |
2a346996 SO |
477 | } |
478 | ||
479 | static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) | |
480 | { | |
895c156c ÉP |
481 | struct lis3lv02d *lis3 = pidev->private; |
482 | ||
483 | atomic_set(&lis3->wake_thread, 0); | |
484 | if (lis3->pm_dev) | |
485 | pm_runtime_put(lis3->pm_dev); | |
2a346996 SO |
486 | } |
487 | ||
895c156c | 488 | static irqreturn_t lis302dl_interrupt(int irq, void *data) |
ef2cfc79 | 489 | { |
895c156c ÉP |
490 | struct lis3lv02d *lis3 = data; |
491 | ||
492 | if (!test_bit(0, &lis3->misc_opened)) | |
92ba4fe4 SO |
493 | goto out; |
494 | ||
ef2cfc79 PM |
495 | /* |
496 | * Be careful: on some HP laptops the bios force DD when on battery and | |
497 | * the lid is closed. This leads to interrupts as soon as a little move | |
498 | * is done. | |
499 | */ | |
895c156c | 500 | atomic_inc(&lis3->count); |
ef2cfc79 | 501 | |
895c156c ÉP |
502 | wake_up_interruptible(&lis3->misc_wait); |
503 | kill_fasync(&lis3->async_queue, SIGIO, POLL_IN); | |
92ba4fe4 | 504 | out: |
895c156c | 505 | if (atomic_read(&lis3->wake_thread)) |
92ba4fe4 | 506 | return IRQ_WAKE_THREAD; |
ef2cfc79 PM |
507 | return IRQ_HANDLED; |
508 | } | |
509 | ||
6d94d408 SO |
510 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
511 | { | |
512 | struct input_dev *dev = lis3->idev->input; | |
513 | u8 click_src; | |
514 | ||
515 | mutex_lock(&lis3->mutex); | |
516 | lis3->read(lis3, CLICK_SRC, &click_src); | |
517 | ||
518 | if (click_src & CLICK_SINGLE_X) { | |
519 | input_report_key(dev, lis3->mapped_btns[0], 1); | |
520 | input_report_key(dev, lis3->mapped_btns[0], 0); | |
521 | } | |
522 | ||
523 | if (click_src & CLICK_SINGLE_Y) { | |
524 | input_report_key(dev, lis3->mapped_btns[1], 1); | |
525 | input_report_key(dev, lis3->mapped_btns[1], 0); | |
526 | } | |
527 | ||
528 | if (click_src & CLICK_SINGLE_Z) { | |
529 | input_report_key(dev, lis3->mapped_btns[2], 1); | |
530 | input_report_key(dev, lis3->mapped_btns[2], 0); | |
531 | } | |
532 | input_sync(dev); | |
533 | mutex_unlock(&lis3->mutex); | |
534 | } | |
535 | ||
029756d0 | 536 | static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
ef2cfc79 | 537 | { |
029756d0 SO |
538 | int dummy; |
539 | ||
540 | /* Dummy read to ack interrupt */ | |
541 | lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy); | |
542 | lis3->data_ready_count[index]++; | |
543 | } | |
6d94d408 | 544 | |
029756d0 SO |
545 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
546 | { | |
6d94d408 | 547 | struct lis3lv02d *lis3 = data; |
029756d0 | 548 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
6d94d408 | 549 | |
029756d0 | 550 | if (irq_cfg == LIS3_IRQ1_CLICK) |
6d94d408 | 551 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
552 | else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
553 | lis302dl_data_ready(lis3, IRQ_LINE0); | |
6d94d408 | 554 | else |
e726111f | 555 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 556 | |
92ba4fe4 SO |
557 | return IRQ_HANDLED; |
558 | } | |
ef2cfc79 | 559 | |
92ba4fe4 SO |
560 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
561 | { | |
6d94d408 | 562 | struct lis3lv02d *lis3 = data; |
029756d0 | 563 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
6d94d408 | 564 | |
029756d0 | 565 | if (irq_cfg == LIS3_IRQ2_CLICK) |
6d94d408 | 566 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
567 | else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
568 | lis302dl_data_ready(lis3, IRQ_LINE1); | |
6d94d408 | 569 | else |
e726111f | 570 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 571 | |
92ba4fe4 SO |
572 | return IRQ_HANDLED; |
573 | } | |
574 | ||
575 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
576 | { | |
895c156c ÉP |
577 | struct lis3lv02d *lis3 = container_of(file->private_data, |
578 | struct lis3lv02d, miscdev); | |
579 | ||
580 | if (test_and_set_bit(0, &lis3->misc_opened)) | |
ef2cfc79 PM |
581 | return -EBUSY; /* already open */ |
582 | ||
895c156c ÉP |
583 | if (lis3->pm_dev) |
584 | pm_runtime_get_sync(lis3->pm_dev); | |
2a346996 | 585 | |
895c156c | 586 | atomic_set(&lis3->count, 0); |
ef2cfc79 PM |
587 | return 0; |
588 | } | |
589 | ||
590 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
591 | { | |
895c156c ÉP |
592 | struct lis3lv02d *lis3 = container_of(file->private_data, |
593 | struct lis3lv02d, miscdev); | |
594 | ||
595 | fasync_helper(-1, file, 0, &lis3->async_queue); | |
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 SO |
833 | unsigned long rate; |
834 | ||
835 | if (strict_strtoul(buf, 0, &rate)) | |
836 | return -EINVAL; | |
837 | ||
895c156c ÉP |
838 | lis3lv02d_sysfs_poweron(lis3); |
839 | if (lis3lv02d_set_odr(lis3, rate)) | |
a253aaef SO |
840 | return -EINVAL; |
841 | ||
842 | return count; | |
843 | } | |
844 | ||
2db4a76d | 845 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 846 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
847 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
848 | lis3lv02d_rate_set); | |
455fbdd3 PM |
849 | |
850 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 851 | &dev_attr_selftest.attr, |
455fbdd3 | 852 | &dev_attr_position.attr, |
455fbdd3 PM |
853 | &dev_attr_rate.attr, |
854 | NULL | |
855 | }; | |
856 | ||
857 | static struct attribute_group lis3lv02d_attribute_group = { | |
858 | .attrs = lis3lv02d_attributes | |
859 | }; | |
860 | ||
cfce41a6 | 861 | |
a38da2ed | 862 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 863 | { |
a002ee89 EP |
864 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
865 | if (IS_ERR(lis3->pdev)) | |
866 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 867 | |
895c156c | 868 | platform_set_drvdata(lis3->pdev, lis3); |
a002ee89 | 869 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
870 | } |
871 | ||
a002ee89 | 872 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 873 | { |
a002ee89 EP |
874 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
875 | platform_device_unregister(lis3->pdev); | |
2a346996 SO |
876 | if (lis3->pm_dev) { |
877 | /* Barrier after the sysfs remove */ | |
878 | pm_runtime_barrier(lis3->pm_dev); | |
879 | ||
880 | /* SYSFS may have left chip running. Turn off if necessary */ | |
881 | if (!pm_runtime_suspended(lis3->pm_dev)) | |
895c156c | 882 | lis3lv02d_poweroff(lis3); |
2a346996 SO |
883 | |
884 | pm_runtime_disable(lis3->pm_dev); | |
885 | pm_runtime_set_suspended(lis3->pm_dev); | |
886 | } | |
f9deb41f | 887 | kfree(lis3->reg_cache); |
455fbdd3 PM |
888 | return 0; |
889 | } | |
cfce41a6 | 890 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 891 | |
d7f81d42 | 892 | static void lis3lv02d_8b_configure(struct lis3lv02d *lis3, |
ecc437ae SO |
893 | struct lis3lv02d_platform_data *p) |
894 | { | |
92ba4fe4 | 895 | int err; |
342c5f12 SO |
896 | int ctrl2 = p->hipass_ctrl; |
897 | ||
ecc437ae | 898 | if (p->click_flags) { |
d7f81d42 ÉP |
899 | lis3->write(lis3, CLICK_CFG, p->click_flags); |
900 | lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit); | |
901 | lis3->write(lis3, CLICK_LATENCY, p->click_latency); | |
902 | lis3->write(lis3, CLICK_WINDOW, p->click_window); | |
903 | lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf); | |
904 | lis3->write(lis3, CLICK_THSY_X, | |
ecc437ae SO |
905 | (p->click_thresh_x & 0xf) | |
906 | (p->click_thresh_y << 4)); | |
6d94d408 | 907 | |
d7f81d42 | 908 | if (lis3->idev) { |
895c156c | 909 | struct input_dev *input_dev = lis3->idev->input; |
6d94d408 SO |
910 | input_set_capability(input_dev, EV_KEY, BTN_X); |
911 | input_set_capability(input_dev, EV_KEY, BTN_Y); | |
912 | input_set_capability(input_dev, EV_KEY, BTN_Z); | |
913 | } | |
ecc437ae SO |
914 | } |
915 | ||
916 | if (p->wakeup_flags) { | |
d7f81d42 ÉP |
917 | lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags); |
918 | lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
cc23aa1c | 919 | /* pdata value + 1 to keep this backward compatible*/ |
d7f81d42 | 920 | lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1); |
342c5f12 SO |
921 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
922 | } | |
923 | ||
924 | if (p->wakeup_flags2) { | |
d7f81d42 ÉP |
925 | lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2); |
926 | lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); | |
cc23aa1c | 927 | /* pdata value + 1 to keep this backward compatible*/ |
d7f81d42 | 928 | lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1); |
342c5f12 | 929 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
ecc437ae | 930 | } |
342c5f12 | 931 | /* Configure hipass filters */ |
d7f81d42 | 932 | lis3->write(lis3, CTRL_REG2, ctrl2); |
92ba4fe4 SO |
933 | |
934 | if (p->irq2) { | |
935 | err = request_threaded_irq(p->irq2, | |
936 | NULL, | |
937 | lis302dl_interrupt_thread2_8b, | |
cc23aa1c SO |
938 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
939 | (p->irq_flags2 & IRQF_TRIGGER_MASK), | |
895c156c | 940 | DRIVER_NAME, lis3); |
92ba4fe4 | 941 | if (err < 0) |
63366d37 | 942 | pr_err("No second IRQ. Limited functionality\n"); |
92ba4fe4 | 943 | } |
ecc437ae SO |
944 | } |
945 | ||
ab337a63 DM |
946 | /* |
947 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 948 | * Should be rather independent of the bus system. |
ab337a63 | 949 | */ |
d7f81d42 | 950 | int lis3lv02d_init_device(struct lis3lv02d *lis3) |
ab337a63 | 951 | { |
92ba4fe4 SO |
952 | int err; |
953 | irq_handler_t thread_fn; | |
cc23aa1c | 954 | int irq_flags = 0; |
92ba4fe4 | 955 | |
d7f81d42 | 956 | lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I); |
a38da2ed | 957 | |
d7f81d42 | 958 | switch (lis3->whoami) { |
bc62c147 | 959 | case WAI_12B: |
63366d37 | 960 | pr_info("12 bits sensor found\n"); |
d7f81d42 ÉP |
961 | lis3->read_data = lis3lv02d_read_12; |
962 | lis3->mdps_max_val = 2048; | |
963 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; | |
964 | lis3->odrs = lis3_12_rates; | |
965 | lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
966 | lis3->scale = LIS3_SENSITIVITY_12B; | |
967 | lis3->regs = lis3_wai12_regs; | |
968 | lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs); | |
a38da2ed | 969 | break; |
bc62c147 | 970 | case WAI_8B: |
63366d37 | 971 | pr_info("8 bits sensor found\n"); |
d7f81d42 ÉP |
972 | lis3->read_data = lis3lv02d_read_8; |
973 | lis3->mdps_max_val = 128; | |
974 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
975 | lis3->odrs = lis3_8_rates; | |
976 | lis3->odr_mask = CTRL1_DR; | |
977 | lis3->scale = LIS3_SENSITIVITY_8B; | |
978 | lis3->regs = lis3_wai8_regs; | |
979 | lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs); | |
a38da2ed | 980 | break; |
78537c3b | 981 | case WAI_3DC: |
63366d37 | 982 | pr_info("8 bits 3DC sensor found\n"); |
d7f81d42 ÉP |
983 | lis3->read_data = lis3lv02d_read_8; |
984 | lis3->mdps_max_val = 128; | |
985 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
986 | lis3->odrs = lis3_3dc_rates; | |
987 | lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; | |
988 | lis3->scale = LIS3_SENSITIVITY_8B; | |
78537c3b | 989 | break; |
0bf5a8be | 990 | case WAI_3DLH: |
e2b2ed83 AC |
991 | pr_info("16 bits lis331dlh sensor found\n"); |
992 | lis3->read_data = lis331dlh_read_data; | |
0bf5a8be AC |
993 | lis3->mdps_max_val = 2048; /* 12 bits for 2G */ |
994 | lis3->shift_adj = SHIFT_ADJ_2G; | |
995 | lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
996 | lis3->odrs = lis3_3dlh_rates; | |
997 | lis3->odr_mask = CTRL1_DR0 | CTRL1_DR1; | |
998 | lis3->scale = LIS3DLH_SENSITIVITY_2G; | |
999 | break; | |
a38da2ed | 1000 | default: |
d7f81d42 | 1001 | pr_err("unknown sensor type 0x%X\n", lis3->whoami); |
a38da2ed DM |
1002 | return -EINVAL; |
1003 | } | |
1004 | ||
d7f81d42 | 1005 | lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
f9deb41f SO |
1006 | sizeof(lis3_wai12_regs)), GFP_KERNEL); |
1007 | ||
d7f81d42 | 1008 | if (lis3->reg_cache == NULL) { |
f9deb41f SO |
1009 | printk(KERN_ERR DRIVER_NAME "out of memory\n"); |
1010 | return -ENOMEM; | |
1011 | } | |
1012 | ||
d7f81d42 ÉP |
1013 | mutex_init(&lis3->mutex); |
1014 | atomic_set(&lis3->wake_thread, 0); | |
2db4a76d | 1015 | |
d7f81d42 ÉP |
1016 | lis3lv02d_add_fs(lis3); |
1017 | err = lis3lv02d_poweron(lis3); | |
1510dd59 | 1018 | if (err) { |
d7f81d42 | 1019 | lis3lv02d_remove_fs(lis3); |
1510dd59 ÉP |
1020 | return err; |
1021 | } | |
ab337a63 | 1022 | |
d7f81d42 ÉP |
1023 | if (lis3->pm_dev) { |
1024 | pm_runtime_set_active(lis3->pm_dev); | |
1025 | pm_runtime_enable(lis3->pm_dev); | |
2a346996 SO |
1026 | } |
1027 | ||
e1e5687d | 1028 | if (lis3lv02d_joystick_enable(lis3)) |
63366d37 | 1029 | pr_err("joystick initialization failed\n"); |
ab337a63 | 1030 | |
8f3128e7 DM |
1031 | /* passing in platform specific data is purely optional and only |
1032 | * used by the SPI transport layer at the moment */ | |
d7f81d42 ÉP |
1033 | if (lis3->pdata) { |
1034 | struct lis3lv02d_platform_data *p = lis3->pdata; | |
8f3128e7 | 1035 | |
d7f81d42 ÉP |
1036 | if (lis3->whoami == WAI_8B) |
1037 | lis3lv02d_8b_configure(lis3, p); | |
8873c334 | 1038 | |
cc23aa1c SO |
1039 | irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
1040 | ||
d7f81d42 | 1041 | lis3->irq_cfg = p->irq_cfg; |
8f3128e7 | 1042 | if (p->irq_cfg) |
d7f81d42 | 1043 | lis3->write(lis3, CTRL_REG3, p->irq_cfg); |
cc23aa1c SO |
1044 | |
1045 | if (p->default_rate) | |
895c156c | 1046 | lis3lv02d_set_odr(lis3, p->default_rate); |
8f3128e7 DM |
1047 | } |
1048 | ||
a38da2ed | 1049 | /* bail if we did not get an IRQ from the bus layer */ |
d7f81d42 | 1050 | if (!lis3->irq) { |
a20f0bc1 | 1051 | pr_debug("No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
1052 | goto out; |
1053 | } | |
1054 | ||
92ba4fe4 SO |
1055 | /* |
1056 | * The sensor can generate interrupts for free-fall and direction | |
1057 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
1058 | * the things simple and _fast_ we activate it only for free-fall, so | |
1059 | * no need to read register (very slow with ACPI). For the same reason, | |
1060 | * we forbid shared interrupts. | |
1061 | * | |
1062 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
1063 | * io-apic is not configurable (and generates a warning) but I keep it | |
1064 | * in case of support for other hardware. | |
1065 | */ | |
d7f81d42 | 1066 | if (lis3->pdata && lis3->whoami == WAI_8B) |
92ba4fe4 SO |
1067 | thread_fn = lis302dl_interrupt_thread1_8b; |
1068 | else | |
1069 | thread_fn = NULL; | |
1070 | ||
d7f81d42 | 1071 | err = request_threaded_irq(lis3->irq, lis302dl_interrupt, |
92ba4fe4 | 1072 | thread_fn, |
cc23aa1c SO |
1073 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
1074 | irq_flags, | |
895c156c | 1075 | DRIVER_NAME, lis3); |
92ba4fe4 SO |
1076 | |
1077 | if (err < 0) { | |
63366d37 | 1078 | pr_err("Cannot get IRQ\n"); |
92ba4fe4 SO |
1079 | goto out; |
1080 | } | |
1081 | ||
895c156c ÉP |
1082 | lis3->miscdev.minor = MISC_DYNAMIC_MINOR; |
1083 | lis3->miscdev.name = "freefall"; | |
1084 | lis3->miscdev.fops = &lis3lv02d_misc_fops; | |
1085 | ||
1086 | if (misc_register(&lis3->miscdev)) | |
63366d37 | 1087 | pr_err("misc_register failed\n"); |
ab337a63 | 1088 | out: |
ab337a63 DM |
1089 | return 0; |
1090 | } | |
1091 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
1092 | ||
455fbdd3 | 1093 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 1094 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 1095 | MODULE_LICENSE("GPL"); |