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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 | ||
477bc918 SO |
83 | #define LIS3_DEFAULT_FUZZ_12B 3 |
84 | #define LIS3_DEFAULT_FLAT_12B 3 | |
85 | #define LIS3_DEFAULT_FUZZ_8B 1 | |
86 | #define LIS3_DEFAULT_FLAT_8B 1 | |
32496c76 | 87 | |
a38da2ed | 88 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 89 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 | 90 | }; |
be84cfc5 | 91 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 92 | |
2ee32144 TI |
93 | /* just like param_set_int() but does sanity-check so that it won't point |
94 | * over the axis array size | |
95 | */ | |
96 | static int param_set_axis(const char *val, const struct kernel_param *kp) | |
97 | { | |
98 | int ret = param_set_int(val, kp); | |
99 | if (!ret) { | |
100 | int val = *(int *)kp->arg; | |
101 | if (val < 0) | |
102 | val = -val; | |
103 | if (!val || val > 3) | |
104 | return -EINVAL; | |
105 | } | |
106 | return ret; | |
107 | } | |
108 | ||
109 | static struct kernel_param_ops param_ops_axis = { | |
110 | .set = param_set_axis, | |
111 | .get = param_get_int, | |
112 | }; | |
113 | ||
114 | module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644); | |
115 | MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions"); | |
116 | ||
a38da2ed DM |
117 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
118 | { | |
119 | s8 lo; | |
120 | if (lis3->read(lis3, reg, &lo) < 0) | |
121 | return 0; | |
122 | ||
123 | return lo; | |
124 | } | |
125 | ||
bc62c147 | 126 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
127 | { |
128 | u8 lo, hi; | |
129 | ||
a38da2ed DM |
130 | lis3->read(lis3, reg - 1, &lo); |
131 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
132 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
133 | return (s16)((hi << 8) | lo); | |
134 | } | |
135 | ||
455fbdd3 PM |
136 | /** |
137 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
138 | * @axis: 1,2,3 - can also be negative | |
139 | * @hw_values: raw values returned by the hardware | |
140 | * | |
141 | * Returns the converted value. | |
142 | */ | |
143 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
144 | { | |
145 | if (axis > 0) | |
146 | return hw_values[axis - 1]; | |
147 | else | |
148 | return -hw_values[-axis - 1]; | |
149 | } | |
150 | ||
151 | /** | |
152 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
153 | * @lis3: pointer to the device struct |
154 | * @x: where to store the X axis value | |
155 | * @y: where to store the Y axis value | |
156 | * @z: where to store the Z axis value | |
455fbdd3 PM |
157 | * |
158 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
159 | */ | |
a38da2ed | 160 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
161 | { |
162 | int position[3]; | |
32496c76 | 163 | int i; |
455fbdd3 | 164 | |
f10a5407 SO |
165 | if (lis3->blkread) { |
166 | if (lis3_dev.whoami == WAI_12B) { | |
167 | u16 data[3]; | |
168 | lis3->blkread(lis3, OUTX_L, 6, (u8 *)data); | |
169 | for (i = 0; i < 3; i++) | |
170 | position[i] = (s16)le16_to_cpu(data[i]); | |
171 | } else { | |
172 | u8 data[5]; | |
173 | /* Data: x, dummy, y, dummy, z */ | |
174 | lis3->blkread(lis3, OUTX, 5, data); | |
175 | for (i = 0; i < 3; i++) | |
176 | position[i] = (s8)data[i * 2]; | |
177 | } | |
178 | } else { | |
179 | position[0] = lis3->read_data(lis3, OUTX); | |
180 | position[1] = lis3->read_data(lis3, OUTY); | |
181 | position[2] = lis3->read_data(lis3, OUTZ); | |
182 | } | |
455fbdd3 | 183 | |
32496c76 SO |
184 | for (i = 0; i < 3; i++) |
185 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; | |
186 | ||
a002ee89 EP |
187 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
188 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
189 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
190 | } |
191 | ||
641615ab SO |
192 | /* conversion btw sampling rate and the register values */ |
193 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; | |
194 | static int lis3_8_rates[2] = {100, 400}; | |
78537c3b | 195 | static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
641615ab | 196 | |
a253aaef | 197 | /* ODR is Output Data Rate */ |
641615ab SO |
198 | static int lis3lv02d_get_odr(void) |
199 | { | |
200 | u8 ctrl; | |
a253aaef | 201 | int shift; |
641615ab SO |
202 | |
203 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); | |
a253aaef SO |
204 | ctrl &= lis3_dev.odr_mask; |
205 | shift = ffs(lis3_dev.odr_mask) - 1; | |
206 | return lis3_dev.odrs[(ctrl >> shift)]; | |
207 | } | |
641615ab | 208 | |
a253aaef SO |
209 | static int lis3lv02d_set_odr(int rate) |
210 | { | |
211 | u8 ctrl; | |
212 | int i, len, shift; | |
213 | ||
78537c3b TI |
214 | if (!rate) |
215 | return -EINVAL; | |
216 | ||
a253aaef SO |
217 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); |
218 | ctrl &= ~lis3_dev.odr_mask; | |
219 | len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */ | |
220 | shift = ffs(lis3_dev.odr_mask) - 1; | |
221 | ||
222 | for (i = 0; i < len; i++) | |
223 | if (lis3_dev.odrs[i] == rate) { | |
224 | lis3_dev.write(&lis3_dev, CTRL_REG1, | |
225 | ctrl | (i << shift)); | |
226 | return 0; | |
227 | } | |
228 | return -EINVAL; | |
641615ab SO |
229 | } |
230 | ||
2db4a76d SO |
231 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
232 | { | |
78537c3b | 233 | u8 ctlreg, reg; |
2db4a76d SO |
234 | s16 x, y, z; |
235 | u8 selftest; | |
236 | int ret; | |
029756d0 SO |
237 | u8 ctrl_reg_data; |
238 | unsigned char irq_cfg; | |
2db4a76d SO |
239 | |
240 | mutex_lock(&lis3->mutex); | |
029756d0 SO |
241 | |
242 | irq_cfg = lis3->irq_cfg; | |
243 | if (lis3_dev.whoami == WAI_8B) { | |
244 | lis3->data_ready_count[IRQ_LINE0] = 0; | |
245 | lis3->data_ready_count[IRQ_LINE1] = 0; | |
246 | ||
247 | /* Change interrupt cfg to data ready for selftest */ | |
248 | atomic_inc(&lis3_dev.wake_thread); | |
249 | lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; | |
250 | lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); | |
251 | lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & | |
252 | ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | | |
253 | (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); | |
254 | } | |
255 | ||
78537c3b TI |
256 | if (lis3_dev.whoami == WAI_3DC) { |
257 | ctlreg = CTRL_REG4; | |
258 | selftest = CTRL4_ST0; | |
259 | } else { | |
260 | ctlreg = CTRL_REG1; | |
261 | if (lis3_dev.whoami == WAI_12B) | |
262 | selftest = CTRL1_ST; | |
263 | else | |
264 | selftest = CTRL1_STP; | |
265 | } | |
2db4a76d | 266 | |
78537c3b TI |
267 | lis3->read(lis3, ctlreg, ®); |
268 | lis3->write(lis3, ctlreg, (reg | selftest)); | |
2db4a76d SO |
269 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); |
270 | ||
271 | /* Read directly to avoid axis remap */ | |
272 | x = lis3->read_data(lis3, OUTX); | |
273 | y = lis3->read_data(lis3, OUTY); | |
274 | z = lis3->read_data(lis3, OUTZ); | |
275 | ||
276 | /* back to normal settings */ | |
78537c3b | 277 | lis3->write(lis3, ctlreg, reg); |
2db4a76d SO |
278 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); |
279 | ||
280 | results[0] = x - lis3->read_data(lis3, OUTX); | |
281 | results[1] = y - lis3->read_data(lis3, OUTY); | |
282 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
283 | ||
284 | ret = 0; | |
029756d0 SO |
285 | |
286 | if (lis3_dev.whoami == WAI_8B) { | |
287 | /* Restore original interrupt configuration */ | |
288 | atomic_dec(&lis3_dev.wake_thread); | |
289 | lis3->write(lis3, CTRL_REG3, ctrl_reg_data); | |
290 | lis3->irq_cfg = irq_cfg; | |
291 | ||
292 | if ((irq_cfg & LIS3_IRQ1_MASK) && | |
293 | lis3->data_ready_count[IRQ_LINE0] < 2) { | |
294 | ret = SELFTEST_IRQ; | |
295 | goto fail; | |
296 | } | |
297 | ||
298 | if ((irq_cfg & LIS3_IRQ2_MASK) && | |
299 | lis3->data_ready_count[IRQ_LINE1] < 2) { | |
300 | ret = SELFTEST_IRQ; | |
301 | goto fail; | |
302 | } | |
303 | } | |
304 | ||
2db4a76d SO |
305 | if (lis3->pdata) { |
306 | int i; | |
307 | for (i = 0; i < 3; i++) { | |
308 | /* Check against selftest acceptance limits */ | |
309 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
310 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
029756d0 | 311 | ret = SELFTEST_FAIL; |
2db4a76d SO |
312 | goto fail; |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | /* test passed */ | |
318 | fail: | |
319 | mutex_unlock(&lis3->mutex); | |
320 | return ret; | |
321 | } | |
322 | ||
f9deb41f SO |
323 | /* |
324 | * Order of registers in the list affects to order of the restore process. | |
325 | * Perhaps it is a good idea to set interrupt enable register as a last one | |
326 | * after all other configurations | |
327 | */ | |
328 | static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, | |
329 | FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, | |
330 | CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, | |
331 | CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, | |
332 | CTRL_REG1, CTRL_REG2, CTRL_REG3}; | |
333 | ||
334 | static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, | |
335 | FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, | |
336 | DD_THSE_L, DD_THSE_H, | |
337 | CTRL_REG1, CTRL_REG3, CTRL_REG2}; | |
338 | ||
339 | static inline void lis3_context_save(struct lis3lv02d *lis3) | |
340 | { | |
341 | int i; | |
342 | for (i = 0; i < lis3->regs_size; i++) | |
343 | lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); | |
344 | lis3->regs_stored = true; | |
345 | } | |
346 | ||
347 | static inline void lis3_context_restore(struct lis3lv02d *lis3) | |
348 | { | |
349 | int i; | |
350 | if (lis3->regs_stored) | |
351 | for (i = 0; i < lis3->regs_size; i++) | |
352 | lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); | |
353 | } | |
354 | ||
a38da2ed | 355 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 356 | { |
f9deb41f SO |
357 | if (lis3->reg_ctrl) |
358 | lis3_context_save(lis3); | |
a002ee89 EP |
359 | /* disable X,Y,Z axis and power down */ |
360 | lis3->write(lis3, CTRL_REG1, 0x00); | |
f9deb41f SO |
361 | if (lis3->reg_ctrl) |
362 | lis3->reg_ctrl(lis3, LIS3_REG_OFF); | |
455fbdd3 | 363 | } |
cfce41a6 | 364 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 365 | |
a38da2ed | 366 | void lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 367 | { |
a002ee89 | 368 | u8 reg; |
455fbdd3 | 369 | |
a002ee89 | 370 | lis3->init(lis3); |
455fbdd3 | 371 | |
a002ee89 EP |
372 | /* |
373 | * Common configuration | |
4b5d95b3 ÉP |
374 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
375 | * both have been read. So the value read will always be correct. | |
2a7fade7 | 376 | * Set BOOT bit to refresh factory tuning values. |
a002ee89 | 377 | */ |
05faadcf TI |
378 | if (lis3->pdata) { |
379 | lis3->read(lis3, CTRL_REG2, ®); | |
380 | if (lis3->whoami == WAI_12B) | |
381 | reg |= CTRL2_BDU | CTRL2_BOOT; | |
382 | else | |
383 | reg |= CTRL2_BOOT_8B; | |
384 | lis3->write(lis3, CTRL_REG2, reg); | |
385 | } | |
2a7fade7 SO |
386 | |
387 | /* LIS3 power on delay is quite long */ | |
388 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
389 | ||
f9deb41f SO |
390 | if (lis3->reg_ctrl) |
391 | lis3_context_restore(lis3); | |
455fbdd3 | 392 | } |
a002ee89 EP |
393 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
394 | ||
455fbdd3 | 395 | |
6d94d408 SO |
396 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
397 | { | |
398 | int x, y, z; | |
399 | ||
400 | mutex_lock(&lis3_dev.mutex); | |
401 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); | |
402 | input_report_abs(pidev->input, ABS_X, x); | |
403 | input_report_abs(pidev->input, ABS_Y, y); | |
404 | input_report_abs(pidev->input, ABS_Z, z); | |
405 | input_sync(pidev->input); | |
406 | mutex_unlock(&lis3_dev.mutex); | |
407 | } | |
408 | ||
2a346996 SO |
409 | static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) |
410 | { | |
411 | if (lis3_dev.pm_dev) | |
412 | pm_runtime_get_sync(lis3_dev.pm_dev); | |
e726111f SO |
413 | |
414 | if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev) | |
415 | atomic_set(&lis3_dev.wake_thread, 1); | |
821f6646 SO |
416 | /* |
417 | * Update coordinates for the case where poll interval is 0 and | |
418 | * the chip in running purely under interrupt control | |
419 | */ | |
420 | lis3lv02d_joystick_poll(pidev); | |
2a346996 SO |
421 | } |
422 | ||
423 | static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) | |
424 | { | |
e726111f | 425 | atomic_set(&lis3_dev.wake_thread, 0); |
2a346996 SO |
426 | if (lis3_dev.pm_dev) |
427 | pm_runtime_put(lis3_dev.pm_dev); | |
428 | } | |
429 | ||
ef2cfc79 PM |
430 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
431 | { | |
92ba4fe4 SO |
432 | if (!test_bit(0, &lis3_dev.misc_opened)) |
433 | goto out; | |
434 | ||
ef2cfc79 PM |
435 | /* |
436 | * Be careful: on some HP laptops the bios force DD when on battery and | |
437 | * the lid is closed. This leads to interrupts as soon as a little move | |
438 | * is done. | |
439 | */ | |
be84cfc5 | 440 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 441 | |
be84cfc5 PM |
442 | wake_up_interruptible(&lis3_dev.misc_wait); |
443 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
92ba4fe4 | 444 | out: |
e726111f | 445 | if (atomic_read(&lis3_dev.wake_thread)) |
92ba4fe4 | 446 | return IRQ_WAKE_THREAD; |
ef2cfc79 PM |
447 | return IRQ_HANDLED; |
448 | } | |
449 | ||
6d94d408 SO |
450 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
451 | { | |
452 | struct input_dev *dev = lis3->idev->input; | |
453 | u8 click_src; | |
454 | ||
455 | mutex_lock(&lis3->mutex); | |
456 | lis3->read(lis3, CLICK_SRC, &click_src); | |
457 | ||
458 | if (click_src & CLICK_SINGLE_X) { | |
459 | input_report_key(dev, lis3->mapped_btns[0], 1); | |
460 | input_report_key(dev, lis3->mapped_btns[0], 0); | |
461 | } | |
462 | ||
463 | if (click_src & CLICK_SINGLE_Y) { | |
464 | input_report_key(dev, lis3->mapped_btns[1], 1); | |
465 | input_report_key(dev, lis3->mapped_btns[1], 0); | |
466 | } | |
467 | ||
468 | if (click_src & CLICK_SINGLE_Z) { | |
469 | input_report_key(dev, lis3->mapped_btns[2], 1); | |
470 | input_report_key(dev, lis3->mapped_btns[2], 0); | |
471 | } | |
472 | input_sync(dev); | |
473 | mutex_unlock(&lis3->mutex); | |
474 | } | |
475 | ||
029756d0 | 476 | static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
ef2cfc79 | 477 | { |
029756d0 SO |
478 | int dummy; |
479 | ||
480 | /* Dummy read to ack interrupt */ | |
481 | lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy); | |
482 | lis3->data_ready_count[index]++; | |
483 | } | |
6d94d408 | 484 | |
029756d0 SO |
485 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
486 | { | |
6d94d408 | 487 | struct lis3lv02d *lis3 = data; |
029756d0 | 488 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
6d94d408 | 489 | |
029756d0 | 490 | if (irq_cfg == LIS3_IRQ1_CLICK) |
6d94d408 | 491 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
492 | else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
493 | lis302dl_data_ready(lis3, IRQ_LINE0); | |
6d94d408 | 494 | else |
e726111f | 495 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 496 | |
92ba4fe4 SO |
497 | return IRQ_HANDLED; |
498 | } | |
ef2cfc79 | 499 | |
92ba4fe4 SO |
500 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
501 | { | |
6d94d408 | 502 | struct lis3lv02d *lis3 = data; |
029756d0 | 503 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
6d94d408 | 504 | |
029756d0 | 505 | if (irq_cfg == LIS3_IRQ2_CLICK) |
6d94d408 | 506 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
507 | else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
508 | lis302dl_data_ready(lis3, IRQ_LINE1); | |
6d94d408 | 509 | else |
e726111f | 510 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 511 | |
92ba4fe4 SO |
512 | return IRQ_HANDLED; |
513 | } | |
514 | ||
515 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
516 | { | |
be84cfc5 | 517 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
518 | return -EBUSY; /* already open */ |
519 | ||
2a346996 SO |
520 | if (lis3_dev.pm_dev) |
521 | pm_runtime_get_sync(lis3_dev.pm_dev); | |
522 | ||
be84cfc5 | 523 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
524 | return 0; |
525 | } | |
526 | ||
527 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
528 | { | |
be84cfc5 | 529 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 | 530 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ |
2a346996 SO |
531 | if (lis3_dev.pm_dev) |
532 | pm_runtime_put(lis3_dev.pm_dev); | |
ef2cfc79 PM |
533 | return 0; |
534 | } | |
535 | ||
536 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
537 | size_t count, loff_t *pos) | |
538 | { | |
539 | DECLARE_WAITQUEUE(wait, current); | |
540 | u32 data; | |
541 | unsigned char byte_data; | |
542 | ssize_t retval = 1; | |
543 | ||
544 | if (count < 1) | |
545 | return -EINVAL; | |
546 | ||
be84cfc5 | 547 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
548 | while (true) { |
549 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 550 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
551 | if (data) |
552 | break; | |
553 | ||
554 | if (file->f_flags & O_NONBLOCK) { | |
555 | retval = -EAGAIN; | |
556 | goto out; | |
557 | } | |
558 | ||
559 | if (signal_pending(current)) { | |
560 | retval = -ERESTARTSYS; | |
561 | goto out; | |
562 | } | |
563 | ||
564 | schedule(); | |
565 | } | |
566 | ||
567 | if (data < 255) | |
568 | byte_data = data; | |
569 | else | |
570 | byte_data = 255; | |
571 | ||
572 | /* make sure we are not going into copy_to_user() with | |
573 | * TASK_INTERRUPTIBLE state */ | |
574 | set_current_state(TASK_RUNNING); | |
575 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
576 | retval = -EFAULT; | |
577 | ||
578 | out: | |
579 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 580 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
581 | |
582 | return retval; | |
583 | } | |
584 | ||
585 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
586 | { | |
be84cfc5 PM |
587 | poll_wait(file, &lis3_dev.misc_wait, wait); |
588 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
589 | return POLLIN | POLLRDNORM; |
590 | return 0; | |
591 | } | |
592 | ||
593 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
594 | { | |
be84cfc5 | 595 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
596 | } |
597 | ||
598 | static const struct file_operations lis3lv02d_misc_fops = { | |
599 | .owner = THIS_MODULE, | |
600 | .llseek = no_llseek, | |
601 | .read = lis3lv02d_misc_read, | |
602 | .open = lis3lv02d_misc_open, | |
603 | .release = lis3lv02d_misc_release, | |
604 | .poll = lis3lv02d_misc_poll, | |
605 | .fasync = lis3lv02d_misc_fasync, | |
606 | }; | |
607 | ||
608 | static struct miscdevice lis3lv02d_misc_device = { | |
609 | .minor = MISC_DYNAMIC_MINOR, | |
610 | .name = "freefall", | |
611 | .fops = &lis3lv02d_misc_fops, | |
612 | }; | |
613 | ||
cfce41a6 | 614 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 615 | { |
dc6ea97b | 616 | struct input_dev *input_dev; |
455fbdd3 | 617 | int err; |
32496c76 | 618 | int max_val, fuzz, flat; |
6d94d408 | 619 | int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
455fbdd3 | 620 | |
be84cfc5 | 621 | if (lis3_dev.idev) |
455fbdd3 PM |
622 | return -EINVAL; |
623 | ||
dc6ea97b | 624 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 625 | if (!lis3_dev.idev) |
455fbdd3 PM |
626 | return -ENOMEM; |
627 | ||
dc6ea97b | 628 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
2a346996 SO |
629 | lis3_dev.idev->open = lis3lv02d_joystick_open; |
630 | lis3_dev.idev->close = lis3lv02d_joystick_close; | |
dc6ea97b | 631 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; |
4a70a413 SO |
632 | lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN; |
633 | lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX; | |
dc6ea97b EP |
634 | input_dev = lis3_dev.idev->input; |
635 | ||
dc6ea97b EP |
636 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
637 | input_dev->phys = DRIVER_NAME "/input0"; | |
638 | input_dev->id.bustype = BUS_HOST; | |
639 | input_dev->id.vendor = 0; | |
640 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 641 | |
dc6ea97b | 642 | set_bit(EV_ABS, input_dev->evbit); |
32496c76 | 643 | max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY; |
477bc918 SO |
644 | if (lis3_dev.whoami == WAI_12B) { |
645 | fuzz = LIS3_DEFAULT_FUZZ_12B; | |
646 | flat = LIS3_DEFAULT_FLAT_12B; | |
647 | } else { | |
648 | fuzz = LIS3_DEFAULT_FUZZ_8B; | |
649 | flat = LIS3_DEFAULT_FLAT_8B; | |
650 | } | |
651 | fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY; | |
652 | flat = (flat * lis3_dev.scale) / LIS3_ACCURACY; | |
653 | ||
32496c76 SO |
654 | input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); |
655 | input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); | |
656 | input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); | |
455fbdd3 | 657 | |
6d94d408 SO |
658 | lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns); |
659 | lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns); | |
660 | lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns); | |
661 | ||
dc6ea97b | 662 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 663 | if (err) { |
dc6ea97b | 664 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 665 | lis3_dev.idev = NULL; |
455fbdd3 PM |
666 | } |
667 | ||
668 | return err; | |
669 | } | |
cfce41a6 | 670 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 671 | |
cfce41a6 | 672 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 673 | { |
92ba4fe4 SO |
674 | if (lis3_dev.irq) |
675 | free_irq(lis3_dev.irq, &lis3_dev); | |
676 | if (lis3_dev.pdata && lis3_dev.pdata->irq2) | |
677 | free_irq(lis3_dev.pdata->irq2, &lis3_dev); | |
678 | ||
be84cfc5 | 679 | if (!lis3_dev.idev) |
455fbdd3 PM |
680 | return; |
681 | ||
c2884242 EP |
682 | if (lis3_dev.irq) |
683 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 684 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 685 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 686 | lis3_dev.idev = NULL; |
455fbdd3 | 687 | } |
cfce41a6 | 688 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 689 | |
455fbdd3 | 690 | /* Sysfs stuff */ |
2a346996 SO |
691 | static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3) |
692 | { | |
693 | /* | |
694 | * SYSFS functions are fast visitors so put-call | |
695 | * immediately after the get-call. However, keep | |
696 | * chip running for a while and schedule delayed | |
697 | * suspend. This way periodic sysfs calls doesn't | |
698 | * suffer from relatively long power up time. | |
699 | */ | |
700 | ||
701 | if (lis3->pm_dev) { | |
702 | pm_runtime_get_sync(lis3->pm_dev); | |
703 | pm_runtime_put_noidle(lis3->pm_dev); | |
704 | pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY); | |
705 | } | |
706 | } | |
707 | ||
2db4a76d SO |
708 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
709 | struct device_attribute *attr, char *buf) | |
710 | { | |
2db4a76d SO |
711 | s16 values[3]; |
712 | ||
029756d0 SO |
713 | static const char ok[] = "OK"; |
714 | static const char fail[] = "FAIL"; | |
715 | static const char irq[] = "FAIL_IRQ"; | |
716 | const char *res; | |
717 | ||
2a346996 | 718 | lis3lv02d_sysfs_poweron(&lis3_dev); |
029756d0 SO |
719 | switch (lis3lv02d_selftest(&lis3_dev, values)) { |
720 | case SELFTEST_FAIL: | |
721 | res = fail; | |
722 | break; | |
723 | case SELFTEST_IRQ: | |
724 | res = irq; | |
725 | break; | |
726 | case SELFTEST_OK: | |
727 | default: | |
728 | res = ok; | |
729 | break; | |
730 | } | |
731 | return sprintf(buf, "%s %d %d %d\n", res, | |
2db4a76d SO |
732 | values[0], values[1], values[2]); |
733 | } | |
734 | ||
455fbdd3 PM |
735 | static ssize_t lis3lv02d_position_show(struct device *dev, |
736 | struct device_attribute *attr, char *buf) | |
737 | { | |
738 | int x, y, z; | |
739 | ||
2a346996 | 740 | lis3lv02d_sysfs_poweron(&lis3_dev); |
6d94d408 | 741 | mutex_lock(&lis3_dev.mutex); |
a38da2ed | 742 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
6d94d408 | 743 | mutex_unlock(&lis3_dev.mutex); |
455fbdd3 PM |
744 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
745 | } | |
746 | ||
455fbdd3 PM |
747 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
748 | struct device_attribute *attr, char *buf) | |
749 | { | |
2a346996 | 750 | lis3lv02d_sysfs_poweron(&lis3_dev); |
641615ab | 751 | return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
455fbdd3 PM |
752 | } |
753 | ||
a253aaef SO |
754 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
755 | struct device_attribute *attr, const char *buf, | |
756 | size_t count) | |
757 | { | |
758 | unsigned long rate; | |
759 | ||
760 | if (strict_strtoul(buf, 0, &rate)) | |
761 | return -EINVAL; | |
762 | ||
2a346996 | 763 | lis3lv02d_sysfs_poweron(&lis3_dev); |
a253aaef SO |
764 | if (lis3lv02d_set_odr(rate)) |
765 | return -EINVAL; | |
766 | ||
767 | return count; | |
768 | } | |
769 | ||
2db4a76d | 770 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 771 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
772 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
773 | lis3lv02d_rate_set); | |
455fbdd3 PM |
774 | |
775 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 776 | &dev_attr_selftest.attr, |
455fbdd3 | 777 | &dev_attr_position.attr, |
455fbdd3 PM |
778 | &dev_attr_rate.attr, |
779 | NULL | |
780 | }; | |
781 | ||
782 | static struct attribute_group lis3lv02d_attribute_group = { | |
783 | .attrs = lis3lv02d_attributes | |
784 | }; | |
785 | ||
cfce41a6 | 786 | |
a38da2ed | 787 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 788 | { |
a002ee89 EP |
789 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
790 | if (IS_ERR(lis3->pdev)) | |
791 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 792 | |
a002ee89 | 793 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
794 | } |
795 | ||
a002ee89 | 796 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 797 | { |
a002ee89 EP |
798 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
799 | platform_device_unregister(lis3->pdev); | |
2a346996 SO |
800 | if (lis3->pm_dev) { |
801 | /* Barrier after the sysfs remove */ | |
802 | pm_runtime_barrier(lis3->pm_dev); | |
803 | ||
804 | /* SYSFS may have left chip running. Turn off if necessary */ | |
805 | if (!pm_runtime_suspended(lis3->pm_dev)) | |
806 | lis3lv02d_poweroff(&lis3_dev); | |
807 | ||
808 | pm_runtime_disable(lis3->pm_dev); | |
809 | pm_runtime_set_suspended(lis3->pm_dev); | |
810 | } | |
f9deb41f | 811 | kfree(lis3->reg_cache); |
455fbdd3 PM |
812 | return 0; |
813 | } | |
cfce41a6 | 814 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 815 | |
ecc437ae SO |
816 | static void lis3lv02d_8b_configure(struct lis3lv02d *dev, |
817 | struct lis3lv02d_platform_data *p) | |
818 | { | |
92ba4fe4 | 819 | int err; |
342c5f12 SO |
820 | int ctrl2 = p->hipass_ctrl; |
821 | ||
ecc437ae SO |
822 | if (p->click_flags) { |
823 | dev->write(dev, CLICK_CFG, p->click_flags); | |
824 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
825 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
826 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
827 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
828 | dev->write(dev, CLICK_THSY_X, | |
829 | (p->click_thresh_x & 0xf) | | |
830 | (p->click_thresh_y << 4)); | |
6d94d408 SO |
831 | |
832 | if (dev->idev) { | |
833 | struct input_dev *input_dev = lis3_dev.idev->input; | |
834 | input_set_capability(input_dev, EV_KEY, BTN_X); | |
835 | input_set_capability(input_dev, EV_KEY, BTN_Y); | |
836 | input_set_capability(input_dev, EV_KEY, BTN_Z); | |
837 | } | |
ecc437ae SO |
838 | } |
839 | ||
840 | if (p->wakeup_flags) { | |
841 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); | |
842 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
cc23aa1c SO |
843 | /* pdata value + 1 to keep this backward compatible*/ |
844 | dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1); | |
342c5f12 SO |
845 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
846 | } | |
847 | ||
848 | if (p->wakeup_flags2) { | |
849 | dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2); | |
850 | dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); | |
cc23aa1c SO |
851 | /* pdata value + 1 to keep this backward compatible*/ |
852 | dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1); | |
342c5f12 | 853 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
ecc437ae | 854 | } |
342c5f12 SO |
855 | /* Configure hipass filters */ |
856 | dev->write(dev, CTRL_REG2, ctrl2); | |
92ba4fe4 SO |
857 | |
858 | if (p->irq2) { | |
859 | err = request_threaded_irq(p->irq2, | |
860 | NULL, | |
861 | lis302dl_interrupt_thread2_8b, | |
cc23aa1c SO |
862 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
863 | (p->irq_flags2 & IRQF_TRIGGER_MASK), | |
92ba4fe4 SO |
864 | DRIVER_NAME, &lis3_dev); |
865 | if (err < 0) | |
63366d37 | 866 | pr_err("No second IRQ. Limited functionality\n"); |
92ba4fe4 | 867 | } |
ecc437ae SO |
868 | } |
869 | ||
ab337a63 DM |
870 | /* |
871 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 872 | * Should be rather independent of the bus system. |
ab337a63 | 873 | */ |
a38da2ed | 874 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 875 | { |
92ba4fe4 SO |
876 | int err; |
877 | irq_handler_t thread_fn; | |
cc23aa1c | 878 | int irq_flags = 0; |
92ba4fe4 | 879 | |
a38da2ed DM |
880 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
881 | ||
882 | switch (dev->whoami) { | |
bc62c147 | 883 | case WAI_12B: |
63366d37 | 884 | pr_info("12 bits sensor found\n"); |
bc62c147 | 885 | dev->read_data = lis3lv02d_read_12; |
a38da2ed | 886 | dev->mdps_max_val = 2048; |
641615ab | 887 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
a253aaef SO |
888 | dev->odrs = lis3_12_rates; |
889 | dev->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
32496c76 | 890 | dev->scale = LIS3_SENSITIVITY_12B; |
f9deb41f SO |
891 | dev->regs = lis3_wai12_regs; |
892 | dev->regs_size = ARRAY_SIZE(lis3_wai12_regs); | |
a38da2ed | 893 | break; |
bc62c147 | 894 | case WAI_8B: |
63366d37 | 895 | pr_info("8 bits sensor found\n"); |
a38da2ed DM |
896 | dev->read_data = lis3lv02d_read_8; |
897 | dev->mdps_max_val = 128; | |
641615ab | 898 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
a253aaef SO |
899 | dev->odrs = lis3_8_rates; |
900 | dev->odr_mask = CTRL1_DR; | |
32496c76 | 901 | dev->scale = LIS3_SENSITIVITY_8B; |
f9deb41f SO |
902 | dev->regs = lis3_wai8_regs; |
903 | dev->regs_size = ARRAY_SIZE(lis3_wai8_regs); | |
a38da2ed | 904 | break; |
78537c3b | 905 | case WAI_3DC: |
63366d37 | 906 | pr_info("8 bits 3DC sensor found\n"); |
78537c3b TI |
907 | dev->read_data = lis3lv02d_read_8; |
908 | dev->mdps_max_val = 128; | |
909 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
910 | dev->odrs = lis3_3dc_rates; | |
911 | dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; | |
912 | dev->scale = LIS3_SENSITIVITY_8B; | |
913 | break; | |
a38da2ed | 914 | default: |
63366d37 | 915 | pr_err("unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
916 | return -EINVAL; |
917 | } | |
918 | ||
f9deb41f SO |
919 | dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
920 | sizeof(lis3_wai12_regs)), GFP_KERNEL); | |
921 | ||
922 | if (dev->reg_cache == NULL) { | |
923 | printk(KERN_ERR DRIVER_NAME "out of memory\n"); | |
924 | return -ENOMEM; | |
925 | } | |
926 | ||
2db4a76d | 927 | mutex_init(&dev->mutex); |
e726111f | 928 | atomic_set(&dev->wake_thread, 0); |
2db4a76d | 929 | |
a38da2ed | 930 | lis3lv02d_add_fs(dev); |
a002ee89 | 931 | lis3lv02d_poweron(dev); |
ab337a63 | 932 | |
2a346996 SO |
933 | if (dev->pm_dev) { |
934 | pm_runtime_set_active(dev->pm_dev); | |
935 | pm_runtime_enable(dev->pm_dev); | |
936 | } | |
937 | ||
ab337a63 | 938 | if (lis3lv02d_joystick_enable()) |
63366d37 | 939 | pr_err("joystick initialization failed\n"); |
ab337a63 | 940 | |
8f3128e7 DM |
941 | /* passing in platform specific data is purely optional and only |
942 | * used by the SPI transport layer at the moment */ | |
943 | if (dev->pdata) { | |
944 | struct lis3lv02d_platform_data *p = dev->pdata; | |
945 | ||
ecc437ae SO |
946 | if (dev->whoami == WAI_8B) |
947 | lis3lv02d_8b_configure(dev, p); | |
8873c334 | 948 | |
cc23aa1c SO |
949 | irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
950 | ||
e726111f | 951 | dev->irq_cfg = p->irq_cfg; |
8f3128e7 DM |
952 | if (p->irq_cfg) |
953 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
cc23aa1c SO |
954 | |
955 | if (p->default_rate) | |
956 | lis3lv02d_set_odr(p->default_rate); | |
8f3128e7 DM |
957 | } |
958 | ||
a38da2ed | 959 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 | 960 | if (!dev->irq) { |
a20f0bc1 | 961 | pr_debug("No IRQ. Disabling /dev/freefall\n"); |
ab337a63 DM |
962 | goto out; |
963 | } | |
964 | ||
92ba4fe4 SO |
965 | /* |
966 | * The sensor can generate interrupts for free-fall and direction | |
967 | * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep | |
968 | * the things simple and _fast_ we activate it only for free-fall, so | |
969 | * no need to read register (very slow with ACPI). For the same reason, | |
970 | * we forbid shared interrupts. | |
971 | * | |
972 | * IRQF_TRIGGER_RISING seems pointless on HP laptops because the | |
973 | * io-apic is not configurable (and generates a warning) but I keep it | |
974 | * in case of support for other hardware. | |
975 | */ | |
f7c77a3d | 976 | if (dev->pdata && dev->whoami == WAI_8B) |
92ba4fe4 SO |
977 | thread_fn = lis302dl_interrupt_thread1_8b; |
978 | else | |
979 | thread_fn = NULL; | |
980 | ||
981 | err = request_threaded_irq(dev->irq, lis302dl_interrupt, | |
982 | thread_fn, | |
cc23aa1c SO |
983 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
984 | irq_flags, | |
92ba4fe4 SO |
985 | DRIVER_NAME, &lis3_dev); |
986 | ||
987 | if (err < 0) { | |
63366d37 | 988 | pr_err("Cannot get IRQ\n"); |
92ba4fe4 SO |
989 | goto out; |
990 | } | |
991 | ||
ab337a63 | 992 | if (misc_register(&lis3lv02d_misc_device)) |
63366d37 | 993 | pr_err("misc_register failed\n"); |
ab337a63 | 994 | out: |
ab337a63 DM |
995 | return 0; |
996 | } | |
997 | EXPORT_SYMBOL_GPL(lis3lv02d_init_device); | |
998 | ||
455fbdd3 | 999 | MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver"); |
ef2cfc79 | 1000 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
455fbdd3 | 1001 | MODULE_LICENSE("GPL"); |