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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 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/dmi.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/interrupt.h> | |
dc6ea97b | 30 | #include <linux/input-polldev.h> |
455fbdd3 PM |
31 | #include <linux/delay.h> |
32 | #include <linux/wait.h> | |
33 | #include <linux/poll.h> | |
f9deb41f | 34 | #include <linux/slab.h> |
455fbdd3 | 35 | #include <linux/freezer.h> |
455fbdd3 | 36 | #include <linux/uaccess.h> |
ef2cfc79 | 37 | #include <linux/miscdevice.h> |
2a346996 | 38 | #include <linux/pm_runtime.h> |
455fbdd3 PM |
39 | #include <asm/atomic.h> |
40 | #include "lis3lv02d.h" | |
41 | ||
42 | #define DRIVER_NAME "lis3lv02d" | |
455fbdd3 PM |
43 | |
44 | /* joystick device poll interval in milliseconds */ | |
45 | #define MDPS_POLL_INTERVAL 50 | |
4a70a413 SO |
46 | #define MDPS_POLL_MIN 0 |
47 | #define MDPS_POLL_MAX 2000 | |
2a346996 SO |
48 | |
49 | #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */ | |
50 | ||
029756d0 SO |
51 | #define SELFTEST_OK 0 |
52 | #define SELFTEST_FAIL -1 | |
53 | #define SELFTEST_IRQ -2 | |
54 | ||
55 | #define IRQ_LINE0 0 | |
56 | #define IRQ_LINE1 1 | |
57 | ||
455fbdd3 PM |
58 | /* |
59 | * The sensor can also generate interrupts (DRDY) but it's pretty pointless | |
bc62c147 | 60 | * because they are generated even if the data do not change. So it's better |
455fbdd3 PM |
61 | * to keep the interrupt for the free-fall event. The values are updated at |
62 | * 40Hz (at the lowest frequency), but as it can be pretty time consuming on | |
63 | * some low processor, we poll the sensor only at 20Hz... enough for the | |
64 | * joystick. | |
65 | */ | |
66 | ||
641615ab SO |
67 | #define LIS3_PWRON_DELAY_WAI_12B (5000) |
68 | #define LIS3_PWRON_DELAY_WAI_8B (3000) | |
69 | ||
32496c76 SO |
70 | /* |
71 | * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG | |
72 | * LIS302D spec says: 18 mG / digit | |
73 | * LIS3_ACCURACY is used to increase accuracy of the intermediate | |
74 | * calculation results. | |
75 | */ | |
76 | #define LIS3_ACCURACY 1024 | |
77 | /* Sensitivity values for -2G +2G scale */ | |
78 | #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) | |
79 | #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) | |
80 | ||
477bc918 SO |
81 | #define LIS3_DEFAULT_FUZZ_12B 3 |
82 | #define LIS3_DEFAULT_FLAT_12B 3 | |
83 | #define LIS3_DEFAULT_FUZZ_8B 1 | |
84 | #define LIS3_DEFAULT_FLAT_8B 1 | |
32496c76 | 85 | |
a38da2ed | 86 | struct lis3lv02d lis3_dev = { |
be84cfc5 | 87 | .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
ef2cfc79 PM |
88 | }; |
89 | ||
be84cfc5 | 90 | EXPORT_SYMBOL_GPL(lis3_dev); |
455fbdd3 | 91 | |
2ee32144 TI |
92 | /* just like param_set_int() but does sanity-check so that it won't point |
93 | * over the axis array size | |
94 | */ | |
95 | static int param_set_axis(const char *val, const struct kernel_param *kp) | |
96 | { | |
97 | int ret = param_set_int(val, kp); | |
98 | if (!ret) { | |
99 | int val = *(int *)kp->arg; | |
100 | if (val < 0) | |
101 | val = -val; | |
102 | if (!val || val > 3) | |
103 | return -EINVAL; | |
104 | } | |
105 | return ret; | |
106 | } | |
107 | ||
108 | static struct kernel_param_ops param_ops_axis = { | |
109 | .set = param_set_axis, | |
110 | .get = param_get_int, | |
111 | }; | |
112 | ||
113 | module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644); | |
114 | MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions"); | |
115 | ||
a38da2ed DM |
116 | static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg) |
117 | { | |
118 | s8 lo; | |
119 | if (lis3->read(lis3, reg, &lo) < 0) | |
120 | return 0; | |
121 | ||
122 | return lo; | |
123 | } | |
124 | ||
bc62c147 | 125 | static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg) |
be84cfc5 PM |
126 | { |
127 | u8 lo, hi; | |
128 | ||
a38da2ed DM |
129 | lis3->read(lis3, reg - 1, &lo); |
130 | lis3->read(lis3, reg, &hi); | |
be84cfc5 PM |
131 | /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */ |
132 | return (s16)((hi << 8) | lo); | |
133 | } | |
134 | ||
455fbdd3 PM |
135 | /** |
136 | * lis3lv02d_get_axis - For the given axis, give the value converted | |
137 | * @axis: 1,2,3 - can also be negative | |
138 | * @hw_values: raw values returned by the hardware | |
139 | * | |
140 | * Returns the converted value. | |
141 | */ | |
142 | static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) | |
143 | { | |
144 | if (axis > 0) | |
145 | return hw_values[axis - 1]; | |
146 | else | |
147 | return -hw_values[-axis - 1]; | |
148 | } | |
149 | ||
150 | /** | |
151 | * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer | |
a38da2ed DM |
152 | * @lis3: pointer to the device struct |
153 | * @x: where to store the X axis value | |
154 | * @y: where to store the Y axis value | |
155 | * @z: where to store the Z axis value | |
455fbdd3 PM |
156 | * |
157 | * Note that 40Hz input device can eat up about 10% CPU at 800MHZ | |
158 | */ | |
a38da2ed | 159 | static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z) |
455fbdd3 PM |
160 | { |
161 | int position[3]; | |
32496c76 | 162 | int i; |
455fbdd3 | 163 | |
f10a5407 SO |
164 | if (lis3->blkread) { |
165 | if (lis3_dev.whoami == WAI_12B) { | |
166 | u16 data[3]; | |
167 | lis3->blkread(lis3, OUTX_L, 6, (u8 *)data); | |
168 | for (i = 0; i < 3; i++) | |
169 | position[i] = (s16)le16_to_cpu(data[i]); | |
170 | } else { | |
171 | u8 data[5]; | |
172 | /* Data: x, dummy, y, dummy, z */ | |
173 | lis3->blkread(lis3, OUTX, 5, data); | |
174 | for (i = 0; i < 3; i++) | |
175 | position[i] = (s8)data[i * 2]; | |
176 | } | |
177 | } else { | |
178 | position[0] = lis3->read_data(lis3, OUTX); | |
179 | position[1] = lis3->read_data(lis3, OUTY); | |
180 | position[2] = lis3->read_data(lis3, OUTZ); | |
181 | } | |
455fbdd3 | 182 | |
32496c76 SO |
183 | for (i = 0; i < 3; i++) |
184 | position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; | |
185 | ||
a002ee89 EP |
186 | *x = lis3lv02d_get_axis(lis3->ac.x, position); |
187 | *y = lis3lv02d_get_axis(lis3->ac.y, position); | |
188 | *z = lis3lv02d_get_axis(lis3->ac.z, position); | |
455fbdd3 PM |
189 | } |
190 | ||
641615ab SO |
191 | /* conversion btw sampling rate and the register values */ |
192 | static int lis3_12_rates[4] = {40, 160, 640, 2560}; | |
193 | static int lis3_8_rates[2] = {100, 400}; | |
78537c3b | 194 | static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
641615ab | 195 | |
a253aaef | 196 | /* ODR is Output Data Rate */ |
641615ab SO |
197 | static int lis3lv02d_get_odr(void) |
198 | { | |
199 | u8 ctrl; | |
a253aaef | 200 | int shift; |
641615ab SO |
201 | |
202 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); | |
a253aaef SO |
203 | ctrl &= lis3_dev.odr_mask; |
204 | shift = ffs(lis3_dev.odr_mask) - 1; | |
205 | return lis3_dev.odrs[(ctrl >> shift)]; | |
206 | } | |
641615ab | 207 | |
a253aaef SO |
208 | static int lis3lv02d_set_odr(int rate) |
209 | { | |
210 | u8 ctrl; | |
211 | int i, len, shift; | |
212 | ||
78537c3b TI |
213 | if (!rate) |
214 | return -EINVAL; | |
215 | ||
a253aaef SO |
216 | lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); |
217 | ctrl &= ~lis3_dev.odr_mask; | |
218 | len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */ | |
219 | shift = ffs(lis3_dev.odr_mask) - 1; | |
220 | ||
221 | for (i = 0; i < len; i++) | |
222 | if (lis3_dev.odrs[i] == rate) { | |
223 | lis3_dev.write(&lis3_dev, CTRL_REG1, | |
224 | ctrl | (i << shift)); | |
225 | return 0; | |
226 | } | |
227 | return -EINVAL; | |
641615ab SO |
228 | } |
229 | ||
2db4a76d SO |
230 | static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
231 | { | |
78537c3b | 232 | u8 ctlreg, reg; |
2db4a76d SO |
233 | s16 x, y, z; |
234 | u8 selftest; | |
235 | int ret; | |
029756d0 SO |
236 | u8 ctrl_reg_data; |
237 | unsigned char irq_cfg; | |
2db4a76d SO |
238 | |
239 | mutex_lock(&lis3->mutex); | |
029756d0 SO |
240 | |
241 | irq_cfg = lis3->irq_cfg; | |
242 | if (lis3_dev.whoami == WAI_8B) { | |
243 | lis3->data_ready_count[IRQ_LINE0] = 0; | |
244 | lis3->data_ready_count[IRQ_LINE1] = 0; | |
245 | ||
246 | /* Change interrupt cfg to data ready for selftest */ | |
247 | atomic_inc(&lis3_dev.wake_thread); | |
248 | lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; | |
249 | lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); | |
250 | lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & | |
251 | ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | | |
252 | (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); | |
253 | } | |
254 | ||
78537c3b TI |
255 | if (lis3_dev.whoami == WAI_3DC) { |
256 | ctlreg = CTRL_REG4; | |
257 | selftest = CTRL4_ST0; | |
258 | } else { | |
259 | ctlreg = CTRL_REG1; | |
260 | if (lis3_dev.whoami == WAI_12B) | |
261 | selftest = CTRL1_ST; | |
262 | else | |
263 | selftest = CTRL1_STP; | |
264 | } | |
2db4a76d | 265 | |
78537c3b TI |
266 | lis3->read(lis3, ctlreg, ®); |
267 | lis3->write(lis3, ctlreg, (reg | selftest)); | |
2db4a76d SO |
268 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); |
269 | ||
270 | /* Read directly to avoid axis remap */ | |
271 | x = lis3->read_data(lis3, OUTX); | |
272 | y = lis3->read_data(lis3, OUTY); | |
273 | z = lis3->read_data(lis3, OUTZ); | |
274 | ||
275 | /* back to normal settings */ | |
78537c3b | 276 | lis3->write(lis3, ctlreg, reg); |
2db4a76d SO |
277 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); |
278 | ||
279 | results[0] = x - lis3->read_data(lis3, OUTX); | |
280 | results[1] = y - lis3->read_data(lis3, OUTY); | |
281 | results[2] = z - lis3->read_data(lis3, OUTZ); | |
282 | ||
283 | ret = 0; | |
029756d0 SO |
284 | |
285 | if (lis3_dev.whoami == WAI_8B) { | |
286 | /* Restore original interrupt configuration */ | |
287 | atomic_dec(&lis3_dev.wake_thread); | |
288 | lis3->write(lis3, CTRL_REG3, ctrl_reg_data); | |
289 | lis3->irq_cfg = irq_cfg; | |
290 | ||
291 | if ((irq_cfg & LIS3_IRQ1_MASK) && | |
292 | lis3->data_ready_count[IRQ_LINE0] < 2) { | |
293 | ret = SELFTEST_IRQ; | |
294 | goto fail; | |
295 | } | |
296 | ||
297 | if ((irq_cfg & LIS3_IRQ2_MASK) && | |
298 | lis3->data_ready_count[IRQ_LINE1] < 2) { | |
299 | ret = SELFTEST_IRQ; | |
300 | goto fail; | |
301 | } | |
302 | } | |
303 | ||
2db4a76d SO |
304 | if (lis3->pdata) { |
305 | int i; | |
306 | for (i = 0; i < 3; i++) { | |
307 | /* Check against selftest acceptance limits */ | |
308 | if ((results[i] < lis3->pdata->st_min_limits[i]) || | |
309 | (results[i] > lis3->pdata->st_max_limits[i])) { | |
029756d0 | 310 | ret = SELFTEST_FAIL; |
2db4a76d SO |
311 | goto fail; |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | /* test passed */ | |
317 | fail: | |
318 | mutex_unlock(&lis3->mutex); | |
319 | return ret; | |
320 | } | |
321 | ||
f9deb41f SO |
322 | /* |
323 | * Order of registers in the list affects to order of the restore process. | |
324 | * Perhaps it is a good idea to set interrupt enable register as a last one | |
325 | * after all other configurations | |
326 | */ | |
327 | static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, | |
328 | FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, | |
329 | CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, | |
330 | CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, | |
331 | CTRL_REG1, CTRL_REG2, CTRL_REG3}; | |
332 | ||
333 | static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, | |
334 | FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, | |
335 | DD_THSE_L, DD_THSE_H, | |
336 | CTRL_REG1, CTRL_REG3, CTRL_REG2}; | |
337 | ||
338 | static inline void lis3_context_save(struct lis3lv02d *lis3) | |
339 | { | |
340 | int i; | |
341 | for (i = 0; i < lis3->regs_size; i++) | |
342 | lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); | |
343 | lis3->regs_stored = true; | |
344 | } | |
345 | ||
346 | static inline void lis3_context_restore(struct lis3lv02d *lis3) | |
347 | { | |
348 | int i; | |
349 | if (lis3->regs_stored) | |
350 | for (i = 0; i < lis3->regs_size; i++) | |
351 | lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); | |
352 | } | |
353 | ||
a38da2ed | 354 | void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
455fbdd3 | 355 | { |
f9deb41f SO |
356 | if (lis3->reg_ctrl) |
357 | lis3_context_save(lis3); | |
a002ee89 EP |
358 | /* disable X,Y,Z axis and power down */ |
359 | lis3->write(lis3, CTRL_REG1, 0x00); | |
f9deb41f SO |
360 | if (lis3->reg_ctrl) |
361 | lis3->reg_ctrl(lis3, LIS3_REG_OFF); | |
455fbdd3 | 362 | } |
cfce41a6 | 363 | EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
455fbdd3 | 364 | |
a38da2ed | 365 | void lis3lv02d_poweron(struct lis3lv02d *lis3) |
455fbdd3 | 366 | { |
a002ee89 | 367 | u8 reg; |
455fbdd3 | 368 | |
a002ee89 | 369 | lis3->init(lis3); |
455fbdd3 | 370 | |
a002ee89 EP |
371 | /* |
372 | * Common configuration | |
4b5d95b3 ÉP |
373 | * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
374 | * both have been read. So the value read will always be correct. | |
2a7fade7 | 375 | * Set BOOT bit to refresh factory tuning values. |
a002ee89 | 376 | */ |
2a7fade7 SO |
377 | lis3->read(lis3, CTRL_REG2, ®); |
378 | if (lis3->whoami == WAI_12B) | |
379 | reg |= CTRL2_BDU | CTRL2_BOOT; | |
380 | else | |
381 | reg |= CTRL2_BOOT_8B; | |
382 | lis3->write(lis3, CTRL_REG2, reg); | |
383 | ||
384 | /* LIS3 power on delay is quite long */ | |
385 | msleep(lis3->pwron_delay / lis3lv02d_get_odr()); | |
386 | ||
f9deb41f SO |
387 | if (lis3->reg_ctrl) |
388 | lis3_context_restore(lis3); | |
455fbdd3 | 389 | } |
a002ee89 EP |
390 | EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
391 | ||
455fbdd3 | 392 | |
6d94d408 SO |
393 | static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
394 | { | |
395 | int x, y, z; | |
396 | ||
397 | mutex_lock(&lis3_dev.mutex); | |
398 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); | |
399 | input_report_abs(pidev->input, ABS_X, x); | |
400 | input_report_abs(pidev->input, ABS_Y, y); | |
401 | input_report_abs(pidev->input, ABS_Z, z); | |
402 | input_sync(pidev->input); | |
403 | mutex_unlock(&lis3_dev.mutex); | |
404 | } | |
405 | ||
2a346996 SO |
406 | static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) |
407 | { | |
408 | if (lis3_dev.pm_dev) | |
409 | pm_runtime_get_sync(lis3_dev.pm_dev); | |
e726111f SO |
410 | |
411 | if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev) | |
412 | atomic_set(&lis3_dev.wake_thread, 1); | |
821f6646 SO |
413 | /* |
414 | * Update coordinates for the case where poll interval is 0 and | |
415 | * the chip in running purely under interrupt control | |
416 | */ | |
417 | lis3lv02d_joystick_poll(pidev); | |
2a346996 SO |
418 | } |
419 | ||
420 | static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) | |
421 | { | |
e726111f | 422 | atomic_set(&lis3_dev.wake_thread, 0); |
2a346996 SO |
423 | if (lis3_dev.pm_dev) |
424 | pm_runtime_put(lis3_dev.pm_dev); | |
425 | } | |
426 | ||
ef2cfc79 PM |
427 | static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
428 | { | |
92ba4fe4 SO |
429 | if (!test_bit(0, &lis3_dev.misc_opened)) |
430 | goto out; | |
431 | ||
ef2cfc79 PM |
432 | /* |
433 | * Be careful: on some HP laptops the bios force DD when on battery and | |
434 | * the lid is closed. This leads to interrupts as soon as a little move | |
435 | * is done. | |
436 | */ | |
be84cfc5 | 437 | atomic_inc(&lis3_dev.count); |
ef2cfc79 | 438 | |
be84cfc5 PM |
439 | wake_up_interruptible(&lis3_dev.misc_wait); |
440 | kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); | |
92ba4fe4 | 441 | out: |
e726111f | 442 | if (atomic_read(&lis3_dev.wake_thread)) |
92ba4fe4 | 443 | return IRQ_WAKE_THREAD; |
ef2cfc79 PM |
444 | return IRQ_HANDLED; |
445 | } | |
446 | ||
6d94d408 SO |
447 | static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
448 | { | |
449 | struct input_dev *dev = lis3->idev->input; | |
450 | u8 click_src; | |
451 | ||
452 | mutex_lock(&lis3->mutex); | |
453 | lis3->read(lis3, CLICK_SRC, &click_src); | |
454 | ||
455 | if (click_src & CLICK_SINGLE_X) { | |
456 | input_report_key(dev, lis3->mapped_btns[0], 1); | |
457 | input_report_key(dev, lis3->mapped_btns[0], 0); | |
458 | } | |
459 | ||
460 | if (click_src & CLICK_SINGLE_Y) { | |
461 | input_report_key(dev, lis3->mapped_btns[1], 1); | |
462 | input_report_key(dev, lis3->mapped_btns[1], 0); | |
463 | } | |
464 | ||
465 | if (click_src & CLICK_SINGLE_Z) { | |
466 | input_report_key(dev, lis3->mapped_btns[2], 1); | |
467 | input_report_key(dev, lis3->mapped_btns[2], 0); | |
468 | } | |
469 | input_sync(dev); | |
470 | mutex_unlock(&lis3->mutex); | |
471 | } | |
472 | ||
029756d0 | 473 | static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
ef2cfc79 | 474 | { |
029756d0 SO |
475 | int dummy; |
476 | ||
477 | /* Dummy read to ack interrupt */ | |
478 | lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy); | |
479 | lis3->data_ready_count[index]++; | |
480 | } | |
6d94d408 | 481 | |
029756d0 SO |
482 | static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
483 | { | |
6d94d408 | 484 | struct lis3lv02d *lis3 = data; |
029756d0 | 485 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
6d94d408 | 486 | |
029756d0 | 487 | if (irq_cfg == LIS3_IRQ1_CLICK) |
6d94d408 | 488 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
489 | else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
490 | lis302dl_data_ready(lis3, IRQ_LINE0); | |
6d94d408 | 491 | else |
e726111f | 492 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 493 | |
92ba4fe4 SO |
494 | return IRQ_HANDLED; |
495 | } | |
ef2cfc79 | 496 | |
92ba4fe4 SO |
497 | static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
498 | { | |
6d94d408 | 499 | struct lis3lv02d *lis3 = data; |
029756d0 | 500 | u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
6d94d408 | 501 | |
029756d0 | 502 | if (irq_cfg == LIS3_IRQ2_CLICK) |
6d94d408 | 503 | lis302dl_interrupt_handle_click(lis3); |
029756d0 SO |
504 | else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
505 | lis302dl_data_ready(lis3, IRQ_LINE1); | |
6d94d408 | 506 | else |
e726111f | 507 | lis3lv02d_joystick_poll(lis3->idev); |
6d94d408 | 508 | |
92ba4fe4 SO |
509 | return IRQ_HANDLED; |
510 | } | |
511 | ||
512 | static int lis3lv02d_misc_open(struct inode *inode, struct file *file) | |
513 | { | |
be84cfc5 | 514 | if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
ef2cfc79 PM |
515 | return -EBUSY; /* already open */ |
516 | ||
2a346996 SO |
517 | if (lis3_dev.pm_dev) |
518 | pm_runtime_get_sync(lis3_dev.pm_dev); | |
519 | ||
be84cfc5 | 520 | atomic_set(&lis3_dev.count, 0); |
ef2cfc79 PM |
521 | return 0; |
522 | } | |
523 | ||
524 | static int lis3lv02d_misc_release(struct inode *inode, struct file *file) | |
525 | { | |
be84cfc5 | 526 | fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
be84cfc5 | 527 | clear_bit(0, &lis3_dev.misc_opened); /* release the device */ |
2a346996 SO |
528 | if (lis3_dev.pm_dev) |
529 | pm_runtime_put(lis3_dev.pm_dev); | |
ef2cfc79 PM |
530 | return 0; |
531 | } | |
532 | ||
533 | static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, | |
534 | size_t count, loff_t *pos) | |
535 | { | |
536 | DECLARE_WAITQUEUE(wait, current); | |
537 | u32 data; | |
538 | unsigned char byte_data; | |
539 | ssize_t retval = 1; | |
540 | ||
541 | if (count < 1) | |
542 | return -EINVAL; | |
543 | ||
be84cfc5 | 544 | add_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
545 | while (true) { |
546 | set_current_state(TASK_INTERRUPTIBLE); | |
be84cfc5 | 547 | data = atomic_xchg(&lis3_dev.count, 0); |
ef2cfc79 PM |
548 | if (data) |
549 | break; | |
550 | ||
551 | if (file->f_flags & O_NONBLOCK) { | |
552 | retval = -EAGAIN; | |
553 | goto out; | |
554 | } | |
555 | ||
556 | if (signal_pending(current)) { | |
557 | retval = -ERESTARTSYS; | |
558 | goto out; | |
559 | } | |
560 | ||
561 | schedule(); | |
562 | } | |
563 | ||
564 | if (data < 255) | |
565 | byte_data = data; | |
566 | else | |
567 | byte_data = 255; | |
568 | ||
569 | /* make sure we are not going into copy_to_user() with | |
570 | * TASK_INTERRUPTIBLE state */ | |
571 | set_current_state(TASK_RUNNING); | |
572 | if (copy_to_user(buf, &byte_data, sizeof(byte_data))) | |
573 | retval = -EFAULT; | |
574 | ||
575 | out: | |
576 | __set_current_state(TASK_RUNNING); | |
be84cfc5 | 577 | remove_wait_queue(&lis3_dev.misc_wait, &wait); |
ef2cfc79 PM |
578 | |
579 | return retval; | |
580 | } | |
581 | ||
582 | static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait) | |
583 | { | |
be84cfc5 PM |
584 | poll_wait(file, &lis3_dev.misc_wait, wait); |
585 | if (atomic_read(&lis3_dev.count)) | |
ef2cfc79 PM |
586 | return POLLIN | POLLRDNORM; |
587 | return 0; | |
588 | } | |
589 | ||
590 | static int lis3lv02d_misc_fasync(int fd, struct file *file, int on) | |
591 | { | |
be84cfc5 | 592 | return fasync_helper(fd, file, on, &lis3_dev.async_queue); |
ef2cfc79 PM |
593 | } |
594 | ||
595 | static const struct file_operations lis3lv02d_misc_fops = { | |
596 | .owner = THIS_MODULE, | |
597 | .llseek = no_llseek, | |
598 | .read = lis3lv02d_misc_read, | |
599 | .open = lis3lv02d_misc_open, | |
600 | .release = lis3lv02d_misc_release, | |
601 | .poll = lis3lv02d_misc_poll, | |
602 | .fasync = lis3lv02d_misc_fasync, | |
603 | }; | |
604 | ||
605 | static struct miscdevice lis3lv02d_misc_device = { | |
606 | .minor = MISC_DYNAMIC_MINOR, | |
607 | .name = "freefall", | |
608 | .fops = &lis3lv02d_misc_fops, | |
609 | }; | |
610 | ||
cfce41a6 | 611 | int lis3lv02d_joystick_enable(void) |
455fbdd3 | 612 | { |
dc6ea97b | 613 | struct input_dev *input_dev; |
455fbdd3 | 614 | int err; |
32496c76 | 615 | int max_val, fuzz, flat; |
6d94d408 | 616 | int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
455fbdd3 | 617 | |
be84cfc5 | 618 | if (lis3_dev.idev) |
455fbdd3 PM |
619 | return -EINVAL; |
620 | ||
dc6ea97b | 621 | lis3_dev.idev = input_allocate_polled_device(); |
be84cfc5 | 622 | if (!lis3_dev.idev) |
455fbdd3 PM |
623 | return -ENOMEM; |
624 | ||
dc6ea97b | 625 | lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
2a346996 SO |
626 | lis3_dev.idev->open = lis3lv02d_joystick_open; |
627 | lis3_dev.idev->close = lis3lv02d_joystick_close; | |
dc6ea97b | 628 | lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; |
4a70a413 SO |
629 | lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN; |
630 | lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX; | |
dc6ea97b EP |
631 | input_dev = lis3_dev.idev->input; |
632 | ||
dc6ea97b EP |
633 | input_dev->name = "ST LIS3LV02DL Accelerometer"; |
634 | input_dev->phys = DRIVER_NAME "/input0"; | |
635 | input_dev->id.bustype = BUS_HOST; | |
636 | input_dev->id.vendor = 0; | |
637 | input_dev->dev.parent = &lis3_dev.pdev->dev; | |
455fbdd3 | 638 | |
dc6ea97b | 639 | set_bit(EV_ABS, input_dev->evbit); |
32496c76 | 640 | max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY; |
477bc918 SO |
641 | if (lis3_dev.whoami == WAI_12B) { |
642 | fuzz = LIS3_DEFAULT_FUZZ_12B; | |
643 | flat = LIS3_DEFAULT_FLAT_12B; | |
644 | } else { | |
645 | fuzz = LIS3_DEFAULT_FUZZ_8B; | |
646 | flat = LIS3_DEFAULT_FLAT_8B; | |
647 | } | |
648 | fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY; | |
649 | flat = (flat * lis3_dev.scale) / LIS3_ACCURACY; | |
650 | ||
32496c76 SO |
651 | input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); |
652 | input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); | |
653 | input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); | |
455fbdd3 | 654 | |
6d94d408 SO |
655 | lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns); |
656 | lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns); | |
657 | lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns); | |
658 | ||
dc6ea97b | 659 | err = input_register_polled_device(lis3_dev.idev); |
455fbdd3 | 660 | if (err) { |
dc6ea97b | 661 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 662 | lis3_dev.idev = NULL; |
455fbdd3 PM |
663 | } |
664 | ||
665 | return err; | |
666 | } | |
cfce41a6 | 667 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
455fbdd3 | 668 | |
cfce41a6 | 669 | void lis3lv02d_joystick_disable(void) |
455fbdd3 | 670 | { |
92ba4fe4 SO |
671 | if (lis3_dev.irq) |
672 | free_irq(lis3_dev.irq, &lis3_dev); | |
673 | if (lis3_dev.pdata && lis3_dev.pdata->irq2) | |
674 | free_irq(lis3_dev.pdata->irq2, &lis3_dev); | |
675 | ||
be84cfc5 | 676 | if (!lis3_dev.idev) |
455fbdd3 PM |
677 | return; |
678 | ||
c2884242 EP |
679 | if (lis3_dev.irq) |
680 | misc_deregister(&lis3lv02d_misc_device); | |
dc6ea97b | 681 | input_unregister_polled_device(lis3_dev.idev); |
66c8569b | 682 | input_free_polled_device(lis3_dev.idev); |
be84cfc5 | 683 | lis3_dev.idev = NULL; |
455fbdd3 | 684 | } |
cfce41a6 | 685 | EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
455fbdd3 | 686 | |
455fbdd3 | 687 | /* Sysfs stuff */ |
2a346996 SO |
688 | static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3) |
689 | { | |
690 | /* | |
691 | * SYSFS functions are fast visitors so put-call | |
692 | * immediately after the get-call. However, keep | |
693 | * chip running for a while and schedule delayed | |
694 | * suspend. This way periodic sysfs calls doesn't | |
695 | * suffer from relatively long power up time. | |
696 | */ | |
697 | ||
698 | if (lis3->pm_dev) { | |
699 | pm_runtime_get_sync(lis3->pm_dev); | |
700 | pm_runtime_put_noidle(lis3->pm_dev); | |
701 | pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY); | |
702 | } | |
703 | } | |
704 | ||
2db4a76d SO |
705 | static ssize_t lis3lv02d_selftest_show(struct device *dev, |
706 | struct device_attribute *attr, char *buf) | |
707 | { | |
2db4a76d SO |
708 | s16 values[3]; |
709 | ||
029756d0 SO |
710 | static const char ok[] = "OK"; |
711 | static const char fail[] = "FAIL"; | |
712 | static const char irq[] = "FAIL_IRQ"; | |
713 | const char *res; | |
714 | ||
2a346996 | 715 | lis3lv02d_sysfs_poweron(&lis3_dev); |
029756d0 SO |
716 | switch (lis3lv02d_selftest(&lis3_dev, values)) { |
717 | case SELFTEST_FAIL: | |
718 | res = fail; | |
719 | break; | |
720 | case SELFTEST_IRQ: | |
721 | res = irq; | |
722 | break; | |
723 | case SELFTEST_OK: | |
724 | default: | |
725 | res = ok; | |
726 | break; | |
727 | } | |
728 | return sprintf(buf, "%s %d %d %d\n", res, | |
2db4a76d SO |
729 | values[0], values[1], values[2]); |
730 | } | |
731 | ||
455fbdd3 PM |
732 | static ssize_t lis3lv02d_position_show(struct device *dev, |
733 | struct device_attribute *attr, char *buf) | |
734 | { | |
735 | int x, y, z; | |
736 | ||
2a346996 | 737 | lis3lv02d_sysfs_poweron(&lis3_dev); |
6d94d408 | 738 | mutex_lock(&lis3_dev.mutex); |
a38da2ed | 739 | lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
6d94d408 | 740 | mutex_unlock(&lis3_dev.mutex); |
455fbdd3 PM |
741 | return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
742 | } | |
743 | ||
455fbdd3 PM |
744 | static ssize_t lis3lv02d_rate_show(struct device *dev, |
745 | struct device_attribute *attr, char *buf) | |
746 | { | |
2a346996 | 747 | lis3lv02d_sysfs_poweron(&lis3_dev); |
641615ab | 748 | return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
455fbdd3 PM |
749 | } |
750 | ||
a253aaef SO |
751 | static ssize_t lis3lv02d_rate_set(struct device *dev, |
752 | struct device_attribute *attr, const char *buf, | |
753 | size_t count) | |
754 | { | |
755 | unsigned long rate; | |
756 | ||
757 | if (strict_strtoul(buf, 0, &rate)) | |
758 | return -EINVAL; | |
759 | ||
2a346996 | 760 | lis3lv02d_sysfs_poweron(&lis3_dev); |
a253aaef SO |
761 | if (lis3lv02d_set_odr(rate)) |
762 | return -EINVAL; | |
763 | ||
764 | return count; | |
765 | } | |
766 | ||
2db4a76d | 767 | static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
455fbdd3 | 768 | static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
a253aaef SO |
769 | static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
770 | lis3lv02d_rate_set); | |
455fbdd3 PM |
771 | |
772 | static struct attribute *lis3lv02d_attributes[] = { | |
2db4a76d | 773 | &dev_attr_selftest.attr, |
455fbdd3 | 774 | &dev_attr_position.attr, |
455fbdd3 PM |
775 | &dev_attr_rate.attr, |
776 | NULL | |
777 | }; | |
778 | ||
779 | static struct attribute_group lis3lv02d_attribute_group = { | |
780 | .attrs = lis3lv02d_attributes | |
781 | }; | |
782 | ||
cfce41a6 | 783 | |
a38da2ed | 784 | static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
455fbdd3 | 785 | { |
a002ee89 EP |
786 | lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); |
787 | if (IS_ERR(lis3->pdev)) | |
788 | return PTR_ERR(lis3->pdev); | |
455fbdd3 | 789 | |
a002ee89 | 790 | return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
455fbdd3 PM |
791 | } |
792 | ||
a002ee89 | 793 | int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
455fbdd3 | 794 | { |
a002ee89 EP |
795 | sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
796 | platform_device_unregister(lis3->pdev); | |
2a346996 SO |
797 | if (lis3->pm_dev) { |
798 | /* Barrier after the sysfs remove */ | |
799 | pm_runtime_barrier(lis3->pm_dev); | |
800 | ||
801 | /* SYSFS may have left chip running. Turn off if necessary */ | |
802 | if (!pm_runtime_suspended(lis3->pm_dev)) | |
803 | lis3lv02d_poweroff(&lis3_dev); | |
804 | ||
805 | pm_runtime_disable(lis3->pm_dev); | |
806 | pm_runtime_set_suspended(lis3->pm_dev); | |
807 | } | |
f9deb41f | 808 | kfree(lis3->reg_cache); |
455fbdd3 PM |
809 | return 0; |
810 | } | |
cfce41a6 | 811 | EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
455fbdd3 | 812 | |
ecc437ae SO |
813 | static void lis3lv02d_8b_configure(struct lis3lv02d *dev, |
814 | struct lis3lv02d_platform_data *p) | |
815 | { | |
92ba4fe4 | 816 | int err; |
342c5f12 SO |
817 | int ctrl2 = p->hipass_ctrl; |
818 | ||
ecc437ae SO |
819 | if (p->click_flags) { |
820 | dev->write(dev, CLICK_CFG, p->click_flags); | |
821 | dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit); | |
822 | dev->write(dev, CLICK_LATENCY, p->click_latency); | |
823 | dev->write(dev, CLICK_WINDOW, p->click_window); | |
824 | dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf); | |
825 | dev->write(dev, CLICK_THSY_X, | |
826 | (p->click_thresh_x & 0xf) | | |
827 | (p->click_thresh_y << 4)); | |
6d94d408 SO |
828 | |
829 | if (dev->idev) { | |
830 | struct input_dev *input_dev = lis3_dev.idev->input; | |
831 | input_set_capability(input_dev, EV_KEY, BTN_X); | |
832 | input_set_capability(input_dev, EV_KEY, BTN_Y); | |
833 | input_set_capability(input_dev, EV_KEY, BTN_Z); | |
834 | } | |
ecc437ae SO |
835 | } |
836 | ||
837 | if (p->wakeup_flags) { | |
838 | dev->write(dev, FF_WU_CFG_1, p->wakeup_flags); | |
839 | dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f); | |
cc23aa1c SO |
840 | /* pdata value + 1 to keep this backward compatible*/ |
841 | dev->write(dev, FF_WU_DURATION_1, p->duration1 + 1); | |
342c5f12 SO |
842 | ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
843 | } | |
844 | ||
845 | if (p->wakeup_flags2) { | |
846 | dev->write(dev, FF_WU_CFG_2, p->wakeup_flags2); | |
847 | dev->write(dev, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); | |
cc23aa1c SO |
848 | /* pdata value + 1 to keep this backward compatible*/ |
849 | dev->write(dev, FF_WU_DURATION_2, p->duration2 + 1); | |
342c5f12 | 850 | ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
ecc437ae | 851 | } |
342c5f12 SO |
852 | /* Configure hipass filters */ |
853 | dev->write(dev, CTRL_REG2, ctrl2); | |
92ba4fe4 SO |
854 | |
855 | if (p->irq2) { | |
856 | err = request_threaded_irq(p->irq2, | |
857 | NULL, | |
858 | lis302dl_interrupt_thread2_8b, | |
cc23aa1c SO |
859 | IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
860 | (p->irq_flags2 & IRQF_TRIGGER_MASK), | |
92ba4fe4 SO |
861 | DRIVER_NAME, &lis3_dev); |
862 | if (err < 0) | |
863 | printk(KERN_ERR DRIVER_NAME | |
864 | "No second IRQ. Limited functionality\n"); | |
865 | } | |
ecc437ae SO |
866 | } |
867 | ||
ab337a63 DM |
868 | /* |
869 | * Initialise the accelerometer and the various subsystems. | |
bc62c147 | 870 | * Should be rather independent of the bus system. |
ab337a63 | 871 | */ |
a38da2ed | 872 | int lis3lv02d_init_device(struct lis3lv02d *dev) |
ab337a63 | 873 | { |
92ba4fe4 SO |
874 | int err; |
875 | irq_handler_t thread_fn; | |
cc23aa1c | 876 | int irq_flags = 0; |
92ba4fe4 | 877 | |
a38da2ed DM |
878 | dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I); |
879 | ||
880 | switch (dev->whoami) { | |
bc62c147 ÉP |
881 | case WAI_12B: |
882 | printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n"); | |
883 | dev->read_data = lis3lv02d_read_12; | |
a38da2ed | 884 | dev->mdps_max_val = 2048; |
641615ab | 885 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
a253aaef SO |
886 | dev->odrs = lis3_12_rates; |
887 | dev->odr_mask = CTRL1_DF0 | CTRL1_DF1; | |
32496c76 | 888 | dev->scale = LIS3_SENSITIVITY_12B; |
f9deb41f SO |
889 | dev->regs = lis3_wai12_regs; |
890 | dev->regs_size = ARRAY_SIZE(lis3_wai12_regs); | |
a38da2ed | 891 | break; |
bc62c147 ÉP |
892 | case WAI_8B: |
893 | printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n"); | |
a38da2ed DM |
894 | dev->read_data = lis3lv02d_read_8; |
895 | dev->mdps_max_val = 128; | |
641615ab | 896 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
a253aaef SO |
897 | dev->odrs = lis3_8_rates; |
898 | dev->odr_mask = CTRL1_DR; | |
32496c76 | 899 | dev->scale = LIS3_SENSITIVITY_8B; |
f9deb41f SO |
900 | dev->regs = lis3_wai8_regs; |
901 | dev->regs_size = ARRAY_SIZE(lis3_wai8_regs); | |
a38da2ed | 902 | break; |
78537c3b TI |
903 | case WAI_3DC: |
904 | printk(KERN_INFO DRIVER_NAME ": 8 bits 3DC sensor found\n"); | |
905 | dev->read_data = lis3lv02d_read_8; | |
906 | dev->mdps_max_val = 128; | |
907 | dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; | |
908 | dev->odrs = lis3_3dc_rates; | |
909 | dev->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; | |
910 | dev->scale = LIS3_SENSITIVITY_8B; | |
911 | break; | |
a38da2ed DM |
912 | default: |
913 | printk(KERN_ERR DRIVER_NAME | |
a002ee89 | 914 | ": unknown sensor type 0x%X\n", dev->whoami); |
a38da2ed DM |
915 | return -EINVAL; |
916 | } | |
917 | ||
f9deb41f SO |
918 | dev->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
919 | sizeof(lis3_wai12_regs)), GFP_KERNEL); | |
920 | ||
921 | if (dev->reg_cache == NULL) { | |
922 | printk(KERN_ERR DRIVER_NAME "out of memory\n"); | |
923 | return -ENOMEM; | |
924 | } | |
925 | ||
2db4a76d | 926 | mutex_init(&dev->mutex); |
e726111f | 927 | atomic_set(&dev->wake_thread, 0); |
2db4a76d | 928 | |
a38da2ed | 929 | lis3lv02d_add_fs(dev); |
a002ee89 | 930 | lis3lv02d_poweron(dev); |
ab337a63 | 931 | |
2a346996 SO |
932 | if (dev->pm_dev) { |
933 | pm_runtime_set_active(dev->pm_dev); | |
934 | pm_runtime_enable(dev->pm_dev); | |
935 | } | |
936 | ||
ab337a63 DM |
937 | if (lis3lv02d_joystick_enable()) |
938 | printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n"); | |
939 | ||
8f3128e7 DM |
940 | /* passing in platform specific data is purely optional and only |
941 | * used by the SPI transport layer at the moment */ | |
942 | if (dev->pdata) { | |
943 | struct lis3lv02d_platform_data *p = dev->pdata; | |
944 | ||
ecc437ae SO |
945 | if (dev->whoami == WAI_8B) |
946 | lis3lv02d_8b_configure(dev, p); | |
8873c334 | 947 | |
cc23aa1c SO |
948 | irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
949 | ||
e726111f | 950 | dev->irq_cfg = p->irq_cfg; |
8f3128e7 DM |
951 | if (p->irq_cfg) |
952 | dev->write(dev, CTRL_REG3, p->irq_cfg); | |
cc23aa1c SO |
953 | |
954 | if (p->default_rate) | |
955 | lis3lv02d_set_odr(p->default_rate); | |
8f3128e7 DM |
956 | } |
957 | ||
a38da2ed | 958 | /* bail if we did not get an IRQ from the bus layer */ |
ab337a63 DM |
959 | if (!dev->irq) { |
960 | printk(KERN_ERR DRIVER_NAME | |
a38da2ed | 961 | ": 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) { | |
988 | printk(KERN_ERR DRIVER_NAME "Cannot get IRQ\n"); | |
989 | goto out; | |
990 | } | |
991 | ||
ab337a63 DM |
992 | if (misc_register(&lis3lv02d_misc_device)) |
993 | printk(KERN_ERR DRIVER_NAME ": misc_register failed\n"); | |
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"); |