1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Azoteq IQS269A Capacitive Touch Controller |
4 | * |
5 | * Copyright (C) 2020 Jeff LaBundy <jeff@labundy.com> |
6 | * |
7 | * This driver registers up to 3 input devices: one representing capacitive or |
8 | * inductive keys as well as Hall-effect switches, and one for each of the two |
9 | * axial sliders presented by the device. |
10 | */ |
11 | |
12 | #include <linux/bits.h> |
13 | #include <linux/completion.h> |
14 | #include <linux/delay.h> |
15 | #include <linux/device.h> |
16 | #include <linux/err.h> |
17 | #include <linux/i2c.h> |
18 | #include <linux/input.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/kernel.h> |
21 | #include <linux/mod_devicetable.h> |
22 | #include <linux/module.h> |
23 | #include <linux/mutex.h> |
24 | #include <linux/property.h> |
25 | #include <linux/regmap.h> |
26 | #include <linux/slab.h> |
27 | |
28 | #define IQS269_VER_INFO 0x00 |
29 | #define IQS269_VER_INFO_PROD_NUM 0x4F |
30 | #define IQS269_VER_INFO_FW_NUM_2 0x03 |
31 | #define IQS269_VER_INFO_FW_NUM_3 0x10 |
32 | |
33 | #define IQS269_SYS_FLAGS 0x02 |
34 | #define IQS269_SYS_FLAGS_SHOW_RESET BIT(15) |
35 | #define IQS269_SYS_FLAGS_PWR_MODE_MASK GENMASK(12, 11) |
36 | #define IQS269_SYS_FLAGS_PWR_MODE_SHIFT 11 |
37 | #define IQS269_SYS_FLAGS_IN_ATI BIT(10) |
38 | |
39 | #define IQS269_CHx_COUNTS 0x08 |
40 | |
41 | #define IQS269_SLIDER_X 0x30 |
42 | |
43 | #define IQS269_CAL_DATA_A 0x35 |
44 | #define IQS269_CAL_DATA_A_HALL_BIN_L_MASK GENMASK(15, 12) |
45 | #define IQS269_CAL_DATA_A_HALL_BIN_L_SHIFT 12 |
46 | #define IQS269_CAL_DATA_A_HALL_BIN_R_MASK GENMASK(11, 8) |
47 | #define IQS269_CAL_DATA_A_HALL_BIN_R_SHIFT 8 |
48 | |
49 | #define IQS269_SYS_SETTINGS 0x80 |
50 | #define IQS269_SYS_SETTINGS_CLK_DIV BIT(15) |
51 | #define IQS269_SYS_SETTINGS_ULP_AUTO BIT(14) |
52 | #define IQS269_SYS_SETTINGS_DIS_AUTO BIT(13) |
53 | #define IQS269_SYS_SETTINGS_PWR_MODE_MASK GENMASK(12, 11) |
54 | #define IQS269_SYS_SETTINGS_PWR_MODE_SHIFT 11 |
55 | #define IQS269_SYS_SETTINGS_PWR_MODE_MAX 3 |
56 | #define IQS269_SYS_SETTINGS_ULP_UPDATE_MASK GENMASK(10, 8) |
57 | #define IQS269_SYS_SETTINGS_ULP_UPDATE_SHIFT 8 |
58 | #define IQS269_SYS_SETTINGS_ULP_UPDATE_MAX 7 |
59 | #define IQS269_SYS_SETTINGS_SLIDER_SWIPE BIT(7) |
60 | #define IQS269_SYS_SETTINGS_RESEED_OFFSET BIT(6) |
61 | #define IQS269_SYS_SETTINGS_EVENT_MODE BIT(5) |
62 | #define IQS269_SYS_SETTINGS_EVENT_MODE_LP BIT(4) |
63 | #define IQS269_SYS_SETTINGS_REDO_ATI BIT(2) |
64 | #define IQS269_SYS_SETTINGS_ACK_RESET BIT(0) |
65 | |
66 | #define IQS269_FILT_STR_LP_LTA_MASK GENMASK(7, 6) |
67 | #define IQS269_FILT_STR_LP_LTA_SHIFT 6 |
68 | #define IQS269_FILT_STR_LP_CNT_MASK GENMASK(5, 4) |
69 | #define IQS269_FILT_STR_LP_CNT_SHIFT 4 |
70 | #define IQS269_FILT_STR_NP_LTA_MASK GENMASK(3, 2) |
71 | #define IQS269_FILT_STR_NP_LTA_SHIFT 2 |
72 | #define IQS269_FILT_STR_NP_CNT_MASK GENMASK(1, 0) |
73 | #define IQS269_FILT_STR_MAX 3 |
74 | |
75 | #define IQS269_EVENT_MASK_SYS BIT(6) |
76 | #define IQS269_EVENT_MASK_GESTURE BIT(3) |
77 | #define IQS269_EVENT_MASK_DEEP BIT(2) |
78 | #define IQS269_EVENT_MASK_TOUCH BIT(1) |
79 | #define IQS269_EVENT_MASK_PROX BIT(0) |
80 | |
81 | #define IQS269_RATE_NP_MS_MAX 255 |
82 | #define IQS269_RATE_LP_MS_MAX 255 |
83 | #define IQS269_RATE_ULP_MS_MAX 4080 |
84 | #define IQS269_TIMEOUT_PWR_MS_MAX 130560 |
85 | #define IQS269_TIMEOUT_LTA_MS_MAX 130560 |
86 | |
87 | #define IQS269_MISC_A_ATI_BAND_DISABLE BIT(15) |
88 | #define IQS269_MISC_A_ATI_LP_ONLY BIT(14) |
89 | #define IQS269_MISC_A_ATI_BAND_TIGHTEN BIT(13) |
90 | #define IQS269_MISC_A_FILT_DISABLE BIT(12) |
91 | #define IQS269_MISC_A_GPIO3_SELECT_MASK GENMASK(10, 8) |
92 | #define IQS269_MISC_A_GPIO3_SELECT_SHIFT 8 |
93 | #define IQS269_MISC_A_DUAL_DIR BIT(6) |
94 | #define IQS269_MISC_A_TX_FREQ_MASK GENMASK(5, 4) |
95 | #define IQS269_MISC_A_TX_FREQ_SHIFT 4 |
96 | #define IQS269_MISC_A_TX_FREQ_MAX 3 |
97 | #define IQS269_MISC_A_GLOBAL_CAP_SIZE BIT(0) |
98 | |
99 | #define IQS269_MISC_B_RESEED_UI_SEL_MASK GENMASK(7, 6) |
100 | #define IQS269_MISC_B_RESEED_UI_SEL_SHIFT 6 |
101 | #define IQS269_MISC_B_RESEED_UI_SEL_MAX 3 |
102 | #define IQS269_MISC_B_TRACKING_UI_ENABLE BIT(4) |
103 | #define IQS269_MISC_B_FILT_STR_SLIDER GENMASK(1, 0) |
104 | |
105 | #define IQS269_TOUCH_HOLD_SLIDER_SEL 0x89 |
106 | #define IQS269_TOUCH_HOLD_DEFAULT 0x14 |
107 | #define IQS269_TOUCH_HOLD_MS_MIN 256 |
108 | #define IQS269_TOUCH_HOLD_MS_MAX 65280 |
109 | |
110 | #define IQS269_TIMEOUT_TAP_MS_MAX 4080 |
111 | #define IQS269_TIMEOUT_SWIPE_MS_MAX 4080 |
112 | #define IQS269_THRESH_SWIPE_MAX 255 |
113 | |
114 | #define IQS269_CHx_ENG_A_MEAS_CAP_SIZE BIT(15) |
115 | #define IQS269_CHx_ENG_A_RX_GND_INACTIVE BIT(13) |
116 | #define IQS269_CHx_ENG_A_LOCAL_CAP_SIZE BIT(12) |
117 | #define IQS269_CHx_ENG_A_ATI_MODE_MASK GENMASK(9, 8) |
118 | #define IQS269_CHx_ENG_A_ATI_MODE_SHIFT 8 |
119 | #define IQS269_CHx_ENG_A_ATI_MODE_MAX 3 |
120 | #define IQS269_CHx_ENG_A_INV_LOGIC BIT(7) |
121 | #define IQS269_CHx_ENG_A_PROJ_BIAS_MASK GENMASK(6, 5) |
122 | #define IQS269_CHx_ENG_A_PROJ_BIAS_SHIFT 5 |
123 | #define IQS269_CHx_ENG_A_PROJ_BIAS_MAX 3 |
124 | #define IQS269_CHx_ENG_A_SENSE_MODE_MASK GENMASK(3, 0) |
125 | #define IQS269_CHx_ENG_A_SENSE_MODE_MAX 15 |
126 | |
127 | #define IQS269_CHx_ENG_B_LOCAL_CAP_ENABLE BIT(13) |
128 | #define IQS269_CHx_ENG_B_SENSE_FREQ_MASK GENMASK(10, 9) |
129 | #define IQS269_CHx_ENG_B_SENSE_FREQ_SHIFT 9 |
130 | #define IQS269_CHx_ENG_B_SENSE_FREQ_MAX 3 |
131 | #define IQS269_CHx_ENG_B_STATIC_ENABLE BIT(8) |
132 | #define IQS269_CHx_ENG_B_ATI_BASE_MASK GENMASK(7, 6) |
133 | #define IQS269_CHx_ENG_B_ATI_BASE_75 0x00 |
134 | #define IQS269_CHx_ENG_B_ATI_BASE_100 0x40 |
135 | #define IQS269_CHx_ENG_B_ATI_BASE_150 0x80 |
136 | #define IQS269_CHx_ENG_B_ATI_BASE_200 0xC0 |
137 | #define IQS269_CHx_ENG_B_ATI_TARGET_MASK GENMASK(5, 0) |
138 | #define IQS269_CHx_ENG_B_ATI_TARGET_MAX 2016 |
139 | |
140 | #define IQS269_CHx_WEIGHT_MAX 255 |
141 | #define IQS269_CHx_THRESH_MAX 255 |
142 | #define IQS269_CHx_HYST_DEEP_MASK GENMASK(7, 4) |
143 | #define IQS269_CHx_HYST_DEEP_SHIFT 4 |
144 | #define IQS269_CHx_HYST_TOUCH_MASK GENMASK(3, 0) |
145 | #define IQS269_CHx_HYST_MAX 15 |
146 | |
147 | #define IQS269_CHx_HALL_INACTIVE 6 |
148 | #define IQS269_CHx_HALL_ACTIVE 7 |
149 | |
150 | #define IQS269_HALL_PAD_R BIT(0) |
151 | #define IQS269_HALL_PAD_L BIT(1) |
152 | #define IQS269_HALL_PAD_INV BIT(6) |
153 | |
154 | #define IQS269_HALL_UI 0xF5 |
155 | #define IQS269_HALL_UI_ENABLE BIT(15) |
156 | |
157 | #define IQS269_MAX_REG 0xFF |
158 | |
159 | #define IQS269_OTP_OPTION_DEFAULT 0x00 |
160 | #define IQS269_OTP_OPTION_TWS 0xD0 |
161 | #define IQS269_OTP_OPTION_HOLD BIT(7) |
162 | |
163 | #define IQS269_NUM_CH 8 |
164 | #define IQS269_NUM_SL 2 |
165 | |
166 | #define iqs269_irq_wait() usleep_range(200, 250) |
167 | |
168 | enum iqs269_local_cap_size { |
169 | IQS269_LOCAL_CAP_SIZE_0, |
170 | IQS269_LOCAL_CAP_SIZE_GLOBAL_ONLY, |
171 | IQS269_LOCAL_CAP_SIZE_GLOBAL_0pF5, |
172 | }; |
173 | |
174 | enum iqs269_st_offs { |
175 | IQS269_ST_OFFS_PROX, |
176 | IQS269_ST_OFFS_DIR, |
177 | IQS269_ST_OFFS_TOUCH, |
178 | IQS269_ST_OFFS_DEEP, |
179 | }; |
180 | |
181 | enum iqs269_th_offs { |
182 | IQS269_TH_OFFS_PROX, |
183 | IQS269_TH_OFFS_TOUCH, |
184 | IQS269_TH_OFFS_DEEP, |
185 | }; |
186 | |
187 | enum iqs269_event_id { |
188 | IQS269_EVENT_PROX_DN, |
189 | IQS269_EVENT_PROX_UP, |
190 | IQS269_EVENT_TOUCH_DN, |
191 | IQS269_EVENT_TOUCH_UP, |
192 | IQS269_EVENT_DEEP_DN, |
193 | IQS269_EVENT_DEEP_UP, |
194 | }; |
195 | |
196 | enum iqs269_slider_id { |
197 | IQS269_SLIDER_NONE, |
198 | IQS269_SLIDER_KEY, |
199 | IQS269_SLIDER_RAW, |
200 | }; |
201 | |
202 | enum iqs269_gesture_id { |
203 | IQS269_GESTURE_TAP, |
204 | IQS269_GESTURE_HOLD, |
205 | IQS269_GESTURE_FLICK_POS, |
206 | IQS269_GESTURE_FLICK_NEG, |
207 | IQS269_NUM_GESTURES, |
208 | }; |
209 | |
210 | struct iqs269_switch_desc { |
211 | unsigned int code; |
212 | bool enabled; |
213 | }; |
214 | |
215 | struct iqs269_event_desc { |
216 | const char *name; |
217 | enum iqs269_st_offs st_offs; |
218 | enum iqs269_th_offs th_offs; |
219 | bool dir_up; |
220 | u8 mask; |
221 | }; |
222 | |
223 | static const struct iqs269_event_desc iqs269_events[] = { |
224 | [IQS269_EVENT_PROX_DN] = { |
225 | .name = "event-prox" , |
226 | .st_offs = IQS269_ST_OFFS_PROX, |
227 | .th_offs = IQS269_TH_OFFS_PROX, |
228 | .mask = IQS269_EVENT_MASK_PROX, |
229 | }, |
230 | [IQS269_EVENT_PROX_UP] = { |
231 | .name = "event-prox-alt" , |
232 | .st_offs = IQS269_ST_OFFS_PROX, |
233 | .th_offs = IQS269_TH_OFFS_PROX, |
234 | .dir_up = true, |
235 | .mask = IQS269_EVENT_MASK_PROX, |
236 | }, |
237 | [IQS269_EVENT_TOUCH_DN] = { |
238 | .name = "event-touch" , |
239 | .st_offs = IQS269_ST_OFFS_TOUCH, |
240 | .th_offs = IQS269_TH_OFFS_TOUCH, |
241 | .mask = IQS269_EVENT_MASK_TOUCH, |
242 | }, |
243 | [IQS269_EVENT_TOUCH_UP] = { |
244 | .name = "event-touch-alt" , |
245 | .st_offs = IQS269_ST_OFFS_TOUCH, |
246 | .th_offs = IQS269_TH_OFFS_TOUCH, |
247 | .dir_up = true, |
248 | .mask = IQS269_EVENT_MASK_TOUCH, |
249 | }, |
250 | [IQS269_EVENT_DEEP_DN] = { |
251 | .name = "event-deep" , |
252 | .st_offs = IQS269_ST_OFFS_DEEP, |
253 | .th_offs = IQS269_TH_OFFS_DEEP, |
254 | .mask = IQS269_EVENT_MASK_DEEP, |
255 | }, |
256 | [IQS269_EVENT_DEEP_UP] = { |
257 | .name = "event-deep-alt" , |
258 | .st_offs = IQS269_ST_OFFS_DEEP, |
259 | .th_offs = IQS269_TH_OFFS_DEEP, |
260 | .dir_up = true, |
261 | .mask = IQS269_EVENT_MASK_DEEP, |
262 | }, |
263 | }; |
264 | |
265 | struct iqs269_ver_info { |
266 | u8 prod_num; |
267 | u8 sw_num; |
268 | u8 hw_num; |
269 | u8 fw_num; |
270 | } __packed; |
271 | |
272 | struct iqs269_ch_reg { |
273 | u8 rx_enable; |
274 | u8 tx_enable; |
275 | __be16 engine_a; |
276 | __be16 engine_b; |
277 | __be16 ati_comp; |
278 | u8 thresh[3]; |
279 | u8 hyst; |
280 | u8 assoc_select; |
281 | u8 assoc_weight; |
282 | } __packed; |
283 | |
284 | struct iqs269_sys_reg { |
285 | __be16 general; |
286 | u8 active; |
287 | u8 filter; |
288 | u8 reseed; |
289 | u8 event_mask; |
290 | u8 rate_np; |
291 | u8 rate_lp; |
292 | u8 rate_ulp; |
293 | u8 timeout_pwr; |
294 | u8 timeout_rdy; |
295 | u8 timeout_lta; |
296 | __be16 misc_a; |
297 | __be16 misc_b; |
298 | u8 blocking; |
299 | u8 padding; |
300 | u8 slider_select[IQS269_NUM_SL]; |
301 | u8 timeout_tap; |
302 | u8 timeout_swipe; |
303 | u8 thresh_swipe; |
304 | u8 redo_ati; |
305 | struct iqs269_ch_reg ch_reg[IQS269_NUM_CH]; |
306 | } __packed; |
307 | |
308 | struct iqs269_flags { |
309 | __be16 system; |
310 | u8 gesture; |
311 | u8 padding; |
312 | u8 states[4]; |
313 | } __packed; |
314 | |
315 | struct iqs269_private { |
316 | struct i2c_client *client; |
317 | struct regmap *regmap; |
318 | struct mutex lock; |
319 | struct iqs269_switch_desc switches[ARRAY_SIZE(iqs269_events)]; |
320 | struct iqs269_ver_info ver_info; |
321 | struct iqs269_sys_reg sys_reg; |
322 | struct completion ati_done; |
323 | struct input_dev *keypad; |
324 | struct input_dev *slider[IQS269_NUM_SL]; |
325 | unsigned int keycode[ARRAY_SIZE(iqs269_events) * IQS269_NUM_CH]; |
326 | unsigned int sl_code[IQS269_NUM_SL][IQS269_NUM_GESTURES]; |
327 | unsigned int otp_option; |
328 | unsigned int ch_num; |
329 | bool hall_enable; |
330 | bool ati_current; |
331 | }; |
332 | |
333 | static enum iqs269_slider_id iqs269_slider_type(struct iqs269_private *iqs269, |
334 | int slider_num) |
335 | { |
336 | int i; |
337 | |
338 | /* |
339 | * Slider 1 is unavailable if the touch-and-hold option is enabled via |
340 | * OTP. In that case, the channel selection register is repurposed for |
341 | * the touch-and-hold timer ceiling. |
342 | */ |
343 | if (slider_num && (iqs269->otp_option & IQS269_OTP_OPTION_HOLD)) |
344 | return IQS269_SLIDER_NONE; |
345 | |
346 | if (!iqs269->sys_reg.slider_select[slider_num]) |
347 | return IQS269_SLIDER_NONE; |
348 | |
349 | for (i = 0; i < IQS269_NUM_GESTURES; i++) |
350 | if (iqs269->sl_code[slider_num][i] != KEY_RESERVED) |
351 | return IQS269_SLIDER_KEY; |
352 | |
353 | return IQS269_SLIDER_RAW; |
354 | } |
355 | |
356 | static int iqs269_ati_mode_set(struct iqs269_private *iqs269, |
357 | unsigned int ch_num, unsigned int mode) |
358 | { |
359 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
360 | u16 engine_a; |
361 | |
362 | if (ch_num >= IQS269_NUM_CH) |
363 | return -EINVAL; |
364 | |
365 | if (mode > IQS269_CHx_ENG_A_ATI_MODE_MAX) |
366 | return -EINVAL; |
367 | |
368 | mutex_lock(&iqs269->lock); |
369 | |
370 | engine_a = be16_to_cpu(ch_reg[ch_num].engine_a); |
371 | |
372 | engine_a &= ~IQS269_CHx_ENG_A_ATI_MODE_MASK; |
373 | engine_a |= (mode << IQS269_CHx_ENG_A_ATI_MODE_SHIFT); |
374 | |
375 | ch_reg[ch_num].engine_a = cpu_to_be16(engine_a); |
376 | iqs269->ati_current = false; |
377 | |
378 | mutex_unlock(lock: &iqs269->lock); |
379 | |
380 | return 0; |
381 | } |
382 | |
383 | static int iqs269_ati_mode_get(struct iqs269_private *iqs269, |
384 | unsigned int ch_num, unsigned int *mode) |
385 | { |
386 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
387 | u16 engine_a; |
388 | |
389 | if (ch_num >= IQS269_NUM_CH) |
390 | return -EINVAL; |
391 | |
392 | mutex_lock(&iqs269->lock); |
393 | engine_a = be16_to_cpu(ch_reg[ch_num].engine_a); |
394 | mutex_unlock(lock: &iqs269->lock); |
395 | |
396 | engine_a &= IQS269_CHx_ENG_A_ATI_MODE_MASK; |
397 | *mode = (engine_a >> IQS269_CHx_ENG_A_ATI_MODE_SHIFT); |
398 | |
399 | return 0; |
400 | } |
401 | |
402 | static int iqs269_ati_base_set(struct iqs269_private *iqs269, |
403 | unsigned int ch_num, unsigned int base) |
404 | { |
405 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
406 | u16 engine_b; |
407 | |
408 | if (ch_num >= IQS269_NUM_CH) |
409 | return -EINVAL; |
410 | |
411 | switch (base) { |
412 | case 75: |
413 | base = IQS269_CHx_ENG_B_ATI_BASE_75; |
414 | break; |
415 | |
416 | case 100: |
417 | base = IQS269_CHx_ENG_B_ATI_BASE_100; |
418 | break; |
419 | |
420 | case 150: |
421 | base = IQS269_CHx_ENG_B_ATI_BASE_150; |
422 | break; |
423 | |
424 | case 200: |
425 | base = IQS269_CHx_ENG_B_ATI_BASE_200; |
426 | break; |
427 | |
428 | default: |
429 | return -EINVAL; |
430 | } |
431 | |
432 | mutex_lock(&iqs269->lock); |
433 | |
434 | engine_b = be16_to_cpu(ch_reg[ch_num].engine_b); |
435 | |
436 | engine_b &= ~IQS269_CHx_ENG_B_ATI_BASE_MASK; |
437 | engine_b |= base; |
438 | |
439 | ch_reg[ch_num].engine_b = cpu_to_be16(engine_b); |
440 | iqs269->ati_current = false; |
441 | |
442 | mutex_unlock(lock: &iqs269->lock); |
443 | |
444 | return 0; |
445 | } |
446 | |
447 | static int iqs269_ati_base_get(struct iqs269_private *iqs269, |
448 | unsigned int ch_num, unsigned int *base) |
449 | { |
450 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
451 | u16 engine_b; |
452 | |
453 | if (ch_num >= IQS269_NUM_CH) |
454 | return -EINVAL; |
455 | |
456 | mutex_lock(&iqs269->lock); |
457 | engine_b = be16_to_cpu(ch_reg[ch_num].engine_b); |
458 | mutex_unlock(lock: &iqs269->lock); |
459 | |
460 | switch (engine_b & IQS269_CHx_ENG_B_ATI_BASE_MASK) { |
461 | case IQS269_CHx_ENG_B_ATI_BASE_75: |
462 | *base = 75; |
463 | return 0; |
464 | |
465 | case IQS269_CHx_ENG_B_ATI_BASE_100: |
466 | *base = 100; |
467 | return 0; |
468 | |
469 | case IQS269_CHx_ENG_B_ATI_BASE_150: |
470 | *base = 150; |
471 | return 0; |
472 | |
473 | case IQS269_CHx_ENG_B_ATI_BASE_200: |
474 | *base = 200; |
475 | return 0; |
476 | |
477 | default: |
478 | return -EINVAL; |
479 | } |
480 | } |
481 | |
482 | static int iqs269_ati_target_set(struct iqs269_private *iqs269, |
483 | unsigned int ch_num, unsigned int target) |
484 | { |
485 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
486 | u16 engine_b; |
487 | |
488 | if (ch_num >= IQS269_NUM_CH) |
489 | return -EINVAL; |
490 | |
491 | if (target > IQS269_CHx_ENG_B_ATI_TARGET_MAX) |
492 | return -EINVAL; |
493 | |
494 | mutex_lock(&iqs269->lock); |
495 | |
496 | engine_b = be16_to_cpu(ch_reg[ch_num].engine_b); |
497 | |
498 | engine_b &= ~IQS269_CHx_ENG_B_ATI_TARGET_MASK; |
499 | engine_b |= target / 32; |
500 | |
501 | ch_reg[ch_num].engine_b = cpu_to_be16(engine_b); |
502 | iqs269->ati_current = false; |
503 | |
504 | mutex_unlock(lock: &iqs269->lock); |
505 | |
506 | return 0; |
507 | } |
508 | |
509 | static int iqs269_ati_target_get(struct iqs269_private *iqs269, |
510 | unsigned int ch_num, unsigned int *target) |
511 | { |
512 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
513 | u16 engine_b; |
514 | |
515 | if (ch_num >= IQS269_NUM_CH) |
516 | return -EINVAL; |
517 | |
518 | mutex_lock(&iqs269->lock); |
519 | engine_b = be16_to_cpu(ch_reg[ch_num].engine_b); |
520 | mutex_unlock(lock: &iqs269->lock); |
521 | |
522 | *target = (engine_b & IQS269_CHx_ENG_B_ATI_TARGET_MASK) * 32; |
523 | |
524 | return 0; |
525 | } |
526 | |
527 | static int iqs269_parse_mask(const struct fwnode_handle *fwnode, |
528 | const char *propname, u8 *mask) |
529 | { |
530 | unsigned int val[IQS269_NUM_CH]; |
531 | int count, error, i; |
532 | |
533 | count = fwnode_property_count_u32(fwnode, propname); |
534 | if (count < 0) |
535 | return 0; |
536 | |
537 | if (count > IQS269_NUM_CH) |
538 | return -EINVAL; |
539 | |
540 | error = fwnode_property_read_u32_array(fwnode, propname, val, nval: count); |
541 | if (error) |
542 | return error; |
543 | |
544 | *mask = 0; |
545 | |
546 | for (i = 0; i < count; i++) { |
547 | if (val[i] >= IQS269_NUM_CH) |
548 | return -EINVAL; |
549 | |
550 | *mask |= BIT(val[i]); |
551 | } |
552 | |
553 | return 0; |
554 | } |
555 | |
556 | static int iqs269_parse_chan(struct iqs269_private *iqs269, |
557 | const struct fwnode_handle *ch_node) |
558 | { |
559 | struct i2c_client *client = iqs269->client; |
560 | struct fwnode_handle *ev_node; |
561 | struct iqs269_ch_reg *ch_reg; |
562 | u16 engine_a, engine_b; |
563 | unsigned int reg, val; |
564 | int error, i; |
565 | |
566 | error = fwnode_property_read_u32(fwnode: ch_node, propname: "reg" , val: ®); |
567 | if (error) { |
568 | dev_err(&client->dev, "Failed to read channel number: %d\n" , |
569 | error); |
570 | return error; |
571 | } else if (reg >= IQS269_NUM_CH) { |
572 | dev_err(&client->dev, "Invalid channel number: %u\n" , reg); |
573 | return -EINVAL; |
574 | } |
575 | |
576 | iqs269->sys_reg.active |= BIT(reg); |
577 | if (!fwnode_property_present(fwnode: ch_node, propname: "azoteq,reseed-disable" )) |
578 | iqs269->sys_reg.reseed |= BIT(reg); |
579 | |
580 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,blocking-enable" )) |
581 | iqs269->sys_reg.blocking |= BIT(reg); |
582 | |
583 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,slider0-select" )) |
584 | iqs269->sys_reg.slider_select[0] |= BIT(reg); |
585 | |
586 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,slider1-select" ) && |
587 | !(iqs269->otp_option & IQS269_OTP_OPTION_HOLD)) |
588 | iqs269->sys_reg.slider_select[1] |= BIT(reg); |
589 | |
590 | ch_reg = &iqs269->sys_reg.ch_reg[reg]; |
591 | |
592 | error = iqs269_parse_mask(fwnode: ch_node, propname: "azoteq,rx-enable" , |
593 | mask: &ch_reg->rx_enable); |
594 | if (error) { |
595 | dev_err(&client->dev, "Invalid channel %u RX enable mask: %d\n" , |
596 | reg, error); |
597 | return error; |
598 | } |
599 | |
600 | error = iqs269_parse_mask(fwnode: ch_node, propname: "azoteq,tx-enable" , |
601 | mask: &ch_reg->tx_enable); |
602 | if (error) { |
603 | dev_err(&client->dev, "Invalid channel %u TX enable mask: %d\n" , |
604 | reg, error); |
605 | return error; |
606 | } |
607 | |
608 | engine_a = be16_to_cpu(ch_reg->engine_a); |
609 | engine_b = be16_to_cpu(ch_reg->engine_b); |
610 | |
611 | engine_a |= IQS269_CHx_ENG_A_MEAS_CAP_SIZE; |
612 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,meas-cap-decrease" )) |
613 | engine_a &= ~IQS269_CHx_ENG_A_MEAS_CAP_SIZE; |
614 | |
615 | engine_a |= IQS269_CHx_ENG_A_RX_GND_INACTIVE; |
616 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,rx-float-inactive" )) |
617 | engine_a &= ~IQS269_CHx_ENG_A_RX_GND_INACTIVE; |
618 | |
619 | engine_a &= ~IQS269_CHx_ENG_A_LOCAL_CAP_SIZE; |
620 | engine_b &= ~IQS269_CHx_ENG_B_LOCAL_CAP_ENABLE; |
621 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,local-cap-size" , val: &val)) { |
622 | switch (val) { |
623 | case IQS269_LOCAL_CAP_SIZE_0: |
624 | break; |
625 | |
626 | case IQS269_LOCAL_CAP_SIZE_GLOBAL_0pF5: |
627 | engine_a |= IQS269_CHx_ENG_A_LOCAL_CAP_SIZE; |
628 | fallthrough; |
629 | |
630 | case IQS269_LOCAL_CAP_SIZE_GLOBAL_ONLY: |
631 | engine_b |= IQS269_CHx_ENG_B_LOCAL_CAP_ENABLE; |
632 | break; |
633 | |
634 | default: |
635 | dev_err(&client->dev, |
636 | "Invalid channel %u local cap. size: %u\n" , reg, |
637 | val); |
638 | return -EINVAL; |
639 | } |
640 | } |
641 | |
642 | engine_a &= ~IQS269_CHx_ENG_A_INV_LOGIC; |
643 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,invert-enable" )) |
644 | engine_a |= IQS269_CHx_ENG_A_INV_LOGIC; |
645 | |
646 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,proj-bias" , val: &val)) { |
647 | if (val > IQS269_CHx_ENG_A_PROJ_BIAS_MAX) { |
648 | dev_err(&client->dev, |
649 | "Invalid channel %u bias current: %u\n" , reg, |
650 | val); |
651 | return -EINVAL; |
652 | } |
653 | |
654 | engine_a &= ~IQS269_CHx_ENG_A_PROJ_BIAS_MASK; |
655 | engine_a |= (val << IQS269_CHx_ENG_A_PROJ_BIAS_SHIFT); |
656 | } |
657 | |
658 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,sense-mode" , val: &val)) { |
659 | if (val > IQS269_CHx_ENG_A_SENSE_MODE_MAX) { |
660 | dev_err(&client->dev, |
661 | "Invalid channel %u sensing mode: %u\n" , reg, |
662 | val); |
663 | return -EINVAL; |
664 | } |
665 | |
666 | engine_a &= ~IQS269_CHx_ENG_A_SENSE_MODE_MASK; |
667 | engine_a |= val; |
668 | } |
669 | |
670 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,sense-freq" , val: &val)) { |
671 | if (val > IQS269_CHx_ENG_B_SENSE_FREQ_MAX) { |
672 | dev_err(&client->dev, |
673 | "Invalid channel %u sensing frequency: %u\n" , |
674 | reg, val); |
675 | return -EINVAL; |
676 | } |
677 | |
678 | engine_b &= ~IQS269_CHx_ENG_B_SENSE_FREQ_MASK; |
679 | engine_b |= (val << IQS269_CHx_ENG_B_SENSE_FREQ_SHIFT); |
680 | } |
681 | |
682 | engine_b &= ~IQS269_CHx_ENG_B_STATIC_ENABLE; |
683 | if (fwnode_property_present(fwnode: ch_node, propname: "azoteq,static-enable" )) |
684 | engine_b |= IQS269_CHx_ENG_B_STATIC_ENABLE; |
685 | |
686 | ch_reg->engine_a = cpu_to_be16(engine_a); |
687 | ch_reg->engine_b = cpu_to_be16(engine_b); |
688 | |
689 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,ati-mode" , val: &val)) { |
690 | error = iqs269_ati_mode_set(iqs269, ch_num: reg, mode: val); |
691 | if (error) { |
692 | dev_err(&client->dev, |
693 | "Invalid channel %u ATI mode: %u\n" , reg, val); |
694 | return error; |
695 | } |
696 | } |
697 | |
698 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,ati-base" , val: &val)) { |
699 | error = iqs269_ati_base_set(iqs269, ch_num: reg, base: val); |
700 | if (error) { |
701 | dev_err(&client->dev, |
702 | "Invalid channel %u ATI base: %u\n" , reg, val); |
703 | return error; |
704 | } |
705 | } |
706 | |
707 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,ati-target" , val: &val)) { |
708 | error = iqs269_ati_target_set(iqs269, ch_num: reg, target: val); |
709 | if (error) { |
710 | dev_err(&client->dev, |
711 | "Invalid channel %u ATI target: %u\n" , reg, |
712 | val); |
713 | return error; |
714 | } |
715 | } |
716 | |
717 | error = iqs269_parse_mask(fwnode: ch_node, propname: "azoteq,assoc-select" , |
718 | mask: &ch_reg->assoc_select); |
719 | if (error) { |
720 | dev_err(&client->dev, "Invalid channel %u association: %d\n" , |
721 | reg, error); |
722 | return error; |
723 | } |
724 | |
725 | if (!fwnode_property_read_u32(fwnode: ch_node, propname: "azoteq,assoc-weight" , val: &val)) { |
726 | if (val > IQS269_CHx_WEIGHT_MAX) { |
727 | dev_err(&client->dev, |
728 | "Invalid channel %u associated weight: %u\n" , |
729 | reg, val); |
730 | return -EINVAL; |
731 | } |
732 | |
733 | ch_reg->assoc_weight = val; |
734 | } |
735 | |
736 | for (i = 0; i < ARRAY_SIZE(iqs269_events); i++) { |
737 | ev_node = fwnode_get_named_child_node(fwnode: ch_node, |
738 | childname: iqs269_events[i].name); |
739 | if (!ev_node) |
740 | continue; |
741 | |
742 | if (!fwnode_property_read_u32(fwnode: ev_node, propname: "azoteq,thresh" , val: &val)) { |
743 | if (val > IQS269_CHx_THRESH_MAX) { |
744 | dev_err(&client->dev, |
745 | "Invalid channel %u threshold: %u\n" , |
746 | reg, val); |
747 | fwnode_handle_put(fwnode: ev_node); |
748 | return -EINVAL; |
749 | } |
750 | |
751 | ch_reg->thresh[iqs269_events[i].th_offs] = val; |
752 | } |
753 | |
754 | if (!fwnode_property_read_u32(fwnode: ev_node, propname: "azoteq,hyst" , val: &val)) { |
755 | u8 *hyst = &ch_reg->hyst; |
756 | |
757 | if (val > IQS269_CHx_HYST_MAX) { |
758 | dev_err(&client->dev, |
759 | "Invalid channel %u hysteresis: %u\n" , |
760 | reg, val); |
761 | fwnode_handle_put(fwnode: ev_node); |
762 | return -EINVAL; |
763 | } |
764 | |
765 | if (i == IQS269_EVENT_DEEP_DN || |
766 | i == IQS269_EVENT_DEEP_UP) { |
767 | *hyst &= ~IQS269_CHx_HYST_DEEP_MASK; |
768 | *hyst |= (val << IQS269_CHx_HYST_DEEP_SHIFT); |
769 | } else if (i == IQS269_EVENT_TOUCH_DN || |
770 | i == IQS269_EVENT_TOUCH_UP) { |
771 | *hyst &= ~IQS269_CHx_HYST_TOUCH_MASK; |
772 | *hyst |= val; |
773 | } |
774 | } |
775 | |
776 | error = fwnode_property_read_u32(fwnode: ev_node, propname: "linux,code" , val: &val); |
777 | fwnode_handle_put(fwnode: ev_node); |
778 | if (error == -EINVAL) { |
779 | continue; |
780 | } else if (error) { |
781 | dev_err(&client->dev, |
782 | "Failed to read channel %u code: %d\n" , reg, |
783 | error); |
784 | return error; |
785 | } |
786 | |
787 | switch (reg) { |
788 | case IQS269_CHx_HALL_ACTIVE: |
789 | if (iqs269->hall_enable) { |
790 | iqs269->switches[i].code = val; |
791 | iqs269->switches[i].enabled = true; |
792 | } |
793 | fallthrough; |
794 | |
795 | case IQS269_CHx_HALL_INACTIVE: |
796 | if (iqs269->hall_enable) |
797 | break; |
798 | fallthrough; |
799 | |
800 | default: |
801 | iqs269->keycode[i * IQS269_NUM_CH + reg] = val; |
802 | } |
803 | |
804 | iqs269->sys_reg.event_mask &= ~iqs269_events[i].mask; |
805 | } |
806 | |
807 | return 0; |
808 | } |
809 | |
810 | static int iqs269_parse_prop(struct iqs269_private *iqs269) |
811 | { |
812 | struct iqs269_sys_reg *sys_reg = &iqs269->sys_reg; |
813 | struct i2c_client *client = iqs269->client; |
814 | struct fwnode_handle *ch_node; |
815 | u16 general, misc_a, misc_b; |
816 | unsigned int val; |
817 | int error; |
818 | |
819 | iqs269->hall_enable = device_property_present(dev: &client->dev, |
820 | propname: "azoteq,hall-enable" ); |
821 | |
822 | error = regmap_raw_read(map: iqs269->regmap, IQS269_SYS_SETTINGS, val: sys_reg, |
823 | val_len: sizeof(*sys_reg)); |
824 | if (error) |
825 | return error; |
826 | |
827 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,filt-str-lp-lta" , |
828 | val: &val)) { |
829 | if (val > IQS269_FILT_STR_MAX) { |
830 | dev_err(&client->dev, "Invalid filter strength: %u\n" , |
831 | val); |
832 | return -EINVAL; |
833 | } |
834 | |
835 | sys_reg->filter &= ~IQS269_FILT_STR_LP_LTA_MASK; |
836 | sys_reg->filter |= (val << IQS269_FILT_STR_LP_LTA_SHIFT); |
837 | } |
838 | |
839 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,filt-str-lp-cnt" , |
840 | val: &val)) { |
841 | if (val > IQS269_FILT_STR_MAX) { |
842 | dev_err(&client->dev, "Invalid filter strength: %u\n" , |
843 | val); |
844 | return -EINVAL; |
845 | } |
846 | |
847 | sys_reg->filter &= ~IQS269_FILT_STR_LP_CNT_MASK; |
848 | sys_reg->filter |= (val << IQS269_FILT_STR_LP_CNT_SHIFT); |
849 | } |
850 | |
851 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,filt-str-np-lta" , |
852 | val: &val)) { |
853 | if (val > IQS269_FILT_STR_MAX) { |
854 | dev_err(&client->dev, "Invalid filter strength: %u\n" , |
855 | val); |
856 | return -EINVAL; |
857 | } |
858 | |
859 | sys_reg->filter &= ~IQS269_FILT_STR_NP_LTA_MASK; |
860 | sys_reg->filter |= (val << IQS269_FILT_STR_NP_LTA_SHIFT); |
861 | } |
862 | |
863 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,filt-str-np-cnt" , |
864 | val: &val)) { |
865 | if (val > IQS269_FILT_STR_MAX) { |
866 | dev_err(&client->dev, "Invalid filter strength: %u\n" , |
867 | val); |
868 | return -EINVAL; |
869 | } |
870 | |
871 | sys_reg->filter &= ~IQS269_FILT_STR_NP_CNT_MASK; |
872 | sys_reg->filter |= val; |
873 | } |
874 | |
875 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,rate-np-ms" , |
876 | val: &val)) { |
877 | if (val > IQS269_RATE_NP_MS_MAX) { |
878 | dev_err(&client->dev, "Invalid report rate: %u\n" , val); |
879 | return -EINVAL; |
880 | } |
881 | |
882 | sys_reg->rate_np = val; |
883 | } |
884 | |
885 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,rate-lp-ms" , |
886 | val: &val)) { |
887 | if (val > IQS269_RATE_LP_MS_MAX) { |
888 | dev_err(&client->dev, "Invalid report rate: %u\n" , val); |
889 | return -EINVAL; |
890 | } |
891 | |
892 | sys_reg->rate_lp = val; |
893 | } |
894 | |
895 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,rate-ulp-ms" , |
896 | val: &val)) { |
897 | if (val > IQS269_RATE_ULP_MS_MAX) { |
898 | dev_err(&client->dev, "Invalid report rate: %u\n" , val); |
899 | return -EINVAL; |
900 | } |
901 | |
902 | sys_reg->rate_ulp = val / 16; |
903 | } |
904 | |
905 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,timeout-pwr-ms" , |
906 | val: &val)) { |
907 | if (val > IQS269_TIMEOUT_PWR_MS_MAX) { |
908 | dev_err(&client->dev, "Invalid timeout: %u\n" , val); |
909 | return -EINVAL; |
910 | } |
911 | |
912 | sys_reg->timeout_pwr = val / 512; |
913 | } |
914 | |
915 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,timeout-lta-ms" , |
916 | val: &val)) { |
917 | if (val > IQS269_TIMEOUT_LTA_MS_MAX) { |
918 | dev_err(&client->dev, "Invalid timeout: %u\n" , val); |
919 | return -EINVAL; |
920 | } |
921 | |
922 | sys_reg->timeout_lta = val / 512; |
923 | } |
924 | |
925 | misc_a = be16_to_cpu(sys_reg->misc_a); |
926 | misc_b = be16_to_cpu(sys_reg->misc_b); |
927 | |
928 | misc_a &= ~IQS269_MISC_A_ATI_BAND_DISABLE; |
929 | if (device_property_present(dev: &client->dev, propname: "azoteq,ati-band-disable" )) |
930 | misc_a |= IQS269_MISC_A_ATI_BAND_DISABLE; |
931 | |
932 | misc_a &= ~IQS269_MISC_A_ATI_LP_ONLY; |
933 | if (device_property_present(dev: &client->dev, propname: "azoteq,ati-lp-only" )) |
934 | misc_a |= IQS269_MISC_A_ATI_LP_ONLY; |
935 | |
936 | misc_a &= ~IQS269_MISC_A_ATI_BAND_TIGHTEN; |
937 | if (device_property_present(dev: &client->dev, propname: "azoteq,ati-band-tighten" )) |
938 | misc_a |= IQS269_MISC_A_ATI_BAND_TIGHTEN; |
939 | |
940 | misc_a &= ~IQS269_MISC_A_FILT_DISABLE; |
941 | if (device_property_present(dev: &client->dev, propname: "azoteq,filt-disable" )) |
942 | misc_a |= IQS269_MISC_A_FILT_DISABLE; |
943 | |
944 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,gpio3-select" , |
945 | val: &val)) { |
946 | if (val >= IQS269_NUM_CH) { |
947 | dev_err(&client->dev, "Invalid GPIO3 selection: %u\n" , |
948 | val); |
949 | return -EINVAL; |
950 | } |
951 | |
952 | misc_a &= ~IQS269_MISC_A_GPIO3_SELECT_MASK; |
953 | misc_a |= (val << IQS269_MISC_A_GPIO3_SELECT_SHIFT); |
954 | } |
955 | |
956 | misc_a &= ~IQS269_MISC_A_DUAL_DIR; |
957 | if (device_property_present(dev: &client->dev, propname: "azoteq,dual-direction" )) |
958 | misc_a |= IQS269_MISC_A_DUAL_DIR; |
959 | |
960 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,tx-freq" , val: &val)) { |
961 | if (val > IQS269_MISC_A_TX_FREQ_MAX) { |
962 | dev_err(&client->dev, |
963 | "Invalid excitation frequency: %u\n" , val); |
964 | return -EINVAL; |
965 | } |
966 | |
967 | misc_a &= ~IQS269_MISC_A_TX_FREQ_MASK; |
968 | misc_a |= (val << IQS269_MISC_A_TX_FREQ_SHIFT); |
969 | } |
970 | |
971 | misc_a &= ~IQS269_MISC_A_GLOBAL_CAP_SIZE; |
972 | if (device_property_present(dev: &client->dev, propname: "azoteq,global-cap-increase" )) |
973 | misc_a |= IQS269_MISC_A_GLOBAL_CAP_SIZE; |
974 | |
975 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,reseed-select" , |
976 | val: &val)) { |
977 | if (val > IQS269_MISC_B_RESEED_UI_SEL_MAX) { |
978 | dev_err(&client->dev, "Invalid reseed selection: %u\n" , |
979 | val); |
980 | return -EINVAL; |
981 | } |
982 | |
983 | misc_b &= ~IQS269_MISC_B_RESEED_UI_SEL_MASK; |
984 | misc_b |= (val << IQS269_MISC_B_RESEED_UI_SEL_SHIFT); |
985 | } |
986 | |
987 | misc_b &= ~IQS269_MISC_B_TRACKING_UI_ENABLE; |
988 | if (device_property_present(dev: &client->dev, propname: "azoteq,tracking-enable" )) |
989 | misc_b |= IQS269_MISC_B_TRACKING_UI_ENABLE; |
990 | |
991 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,filt-str-slider" , |
992 | val: &val)) { |
993 | if (val > IQS269_FILT_STR_MAX) { |
994 | dev_err(&client->dev, "Invalid filter strength: %u\n" , |
995 | val); |
996 | return -EINVAL; |
997 | } |
998 | |
999 | misc_b &= ~IQS269_MISC_B_FILT_STR_SLIDER; |
1000 | misc_b |= val; |
1001 | } |
1002 | |
1003 | sys_reg->misc_a = cpu_to_be16(misc_a); |
1004 | sys_reg->misc_b = cpu_to_be16(misc_b); |
1005 | |
1006 | sys_reg->active = 0; |
1007 | sys_reg->reseed = 0; |
1008 | |
1009 | sys_reg->blocking = 0; |
1010 | |
1011 | sys_reg->slider_select[0] = 0; |
1012 | |
1013 | /* |
1014 | * If configured via OTP to do so, the device asserts a pulse on the |
1015 | * GPIO4 pin for approximately 60 ms once a selected channel is held |
1016 | * in a state of touch for a configurable length of time. |
1017 | * |
1018 | * In that case, the register used for slider 1 channel selection is |
1019 | * repurposed for the touch-and-hold timer ceiling. |
1020 | */ |
1021 | if (iqs269->otp_option & IQS269_OTP_OPTION_HOLD) { |
1022 | if (!device_property_read_u32(dev: &client->dev, |
1023 | propname: "azoteq,touch-hold-ms" , val: &val)) { |
1024 | if (val < IQS269_TOUCH_HOLD_MS_MIN || |
1025 | val > IQS269_TOUCH_HOLD_MS_MAX) { |
1026 | dev_err(&client->dev, |
1027 | "Invalid touch-and-hold ceiling: %u\n" , |
1028 | val); |
1029 | return -EINVAL; |
1030 | } |
1031 | |
1032 | sys_reg->slider_select[1] = val / 256; |
1033 | } else if (iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) { |
1034 | /* |
1035 | * The default touch-and-hold timer ceiling initially |
1036 | * read from early revisions of silicon is invalid if |
1037 | * the device experienced a soft reset between power- |
1038 | * on and the read operation. |
1039 | * |
1040 | * To protect against this case, explicitly cache the |
1041 | * default value so that it is restored each time the |
1042 | * device is re-initialized. |
1043 | */ |
1044 | sys_reg->slider_select[1] = IQS269_TOUCH_HOLD_DEFAULT; |
1045 | } |
1046 | } else { |
1047 | sys_reg->slider_select[1] = 0; |
1048 | } |
1049 | |
1050 | sys_reg->event_mask = ~((u8)IQS269_EVENT_MASK_SYS); |
1051 | |
1052 | device_for_each_child_node(&client->dev, ch_node) { |
1053 | error = iqs269_parse_chan(iqs269, ch_node); |
1054 | if (error) { |
1055 | fwnode_handle_put(fwnode: ch_node); |
1056 | return error; |
1057 | } |
1058 | } |
1059 | |
1060 | /* |
1061 | * Volunteer all active channels to participate in ATI when REDO-ATI is |
1062 | * manually triggered. |
1063 | */ |
1064 | sys_reg->redo_ati = sys_reg->active; |
1065 | |
1066 | general = be16_to_cpu(sys_reg->general); |
1067 | |
1068 | if (device_property_present(dev: &client->dev, propname: "azoteq,clk-div" )) |
1069 | general |= IQS269_SYS_SETTINGS_CLK_DIV; |
1070 | |
1071 | /* |
1072 | * Configure the device to automatically switch between normal and low- |
1073 | * power modes as a function of sensing activity. Ultra-low-power mode, |
1074 | * if enabled, is reserved for suspend. |
1075 | */ |
1076 | general &= ~IQS269_SYS_SETTINGS_ULP_AUTO; |
1077 | general &= ~IQS269_SYS_SETTINGS_DIS_AUTO; |
1078 | general &= ~IQS269_SYS_SETTINGS_PWR_MODE_MASK; |
1079 | |
1080 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,suspend-mode" , |
1081 | val: &val)) { |
1082 | if (val > IQS269_SYS_SETTINGS_PWR_MODE_MAX) { |
1083 | dev_err(&client->dev, "Invalid suspend mode: %u\n" , |
1084 | val); |
1085 | return -EINVAL; |
1086 | } |
1087 | |
1088 | general |= (val << IQS269_SYS_SETTINGS_PWR_MODE_SHIFT); |
1089 | } |
1090 | |
1091 | if (!device_property_read_u32(dev: &client->dev, propname: "azoteq,ulp-update" , |
1092 | val: &val)) { |
1093 | if (val > IQS269_SYS_SETTINGS_ULP_UPDATE_MAX) { |
1094 | dev_err(&client->dev, "Invalid update rate: %u\n" , val); |
1095 | return -EINVAL; |
1096 | } |
1097 | |
1098 | general &= ~IQS269_SYS_SETTINGS_ULP_UPDATE_MASK; |
1099 | general |= (val << IQS269_SYS_SETTINGS_ULP_UPDATE_SHIFT); |
1100 | } |
1101 | |
1102 | if (device_property_present(dev: &client->dev, propname: "linux,keycodes" )) { |
1103 | int scale = 1; |
1104 | int count = device_property_count_u32(dev: &client->dev, |
1105 | propname: "linux,keycodes" ); |
1106 | if (count > IQS269_NUM_GESTURES * IQS269_NUM_SL) { |
1107 | dev_err(&client->dev, "Too many keycodes present\n" ); |
1108 | return -EINVAL; |
1109 | } else if (count < 0) { |
1110 | dev_err(&client->dev, "Failed to count keycodes: %d\n" , |
1111 | count); |
1112 | return count; |
1113 | } |
1114 | |
1115 | error = device_property_read_u32_array(dev: &client->dev, |
1116 | propname: "linux,keycodes" , |
1117 | val: *iqs269->sl_code, nval: count); |
1118 | if (error) { |
1119 | dev_err(&client->dev, "Failed to read keycodes: %d\n" , |
1120 | error); |
1121 | return error; |
1122 | } |
1123 | |
1124 | if (device_property_present(dev: &client->dev, |
1125 | propname: "azoteq,gesture-swipe" )) |
1126 | general |= IQS269_SYS_SETTINGS_SLIDER_SWIPE; |
1127 | |
1128 | /* |
1129 | * Early revisions of silicon use a more granular step size for |
1130 | * tap and swipe gesture timeouts; scale them appropriately. |
1131 | */ |
1132 | if (iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) |
1133 | scale = 4; |
1134 | |
1135 | if (!device_property_read_u32(dev: &client->dev, |
1136 | propname: "azoteq,timeout-tap-ms" , val: &val)) { |
1137 | if (val > IQS269_TIMEOUT_TAP_MS_MAX / scale) { |
1138 | dev_err(&client->dev, "Invalid timeout: %u\n" , |
1139 | val); |
1140 | return -EINVAL; |
1141 | } |
1142 | |
1143 | sys_reg->timeout_tap = val / (16 / scale); |
1144 | } |
1145 | |
1146 | if (!device_property_read_u32(dev: &client->dev, |
1147 | propname: "azoteq,timeout-swipe-ms" , |
1148 | val: &val)) { |
1149 | if (val > IQS269_TIMEOUT_SWIPE_MS_MAX / scale) { |
1150 | dev_err(&client->dev, "Invalid timeout: %u\n" , |
1151 | val); |
1152 | return -EINVAL; |
1153 | } |
1154 | |
1155 | sys_reg->timeout_swipe = val / (16 / scale); |
1156 | } |
1157 | |
1158 | if (!device_property_read_u32(dev: &client->dev, |
1159 | propname: "azoteq,thresh-swipe" , val: &val)) { |
1160 | if (val > IQS269_THRESH_SWIPE_MAX) { |
1161 | dev_err(&client->dev, "Invalid threshold: %u\n" , |
1162 | val); |
1163 | return -EINVAL; |
1164 | } |
1165 | |
1166 | sys_reg->thresh_swipe = val; |
1167 | } |
1168 | |
1169 | sys_reg->event_mask &= ~IQS269_EVENT_MASK_GESTURE; |
1170 | } |
1171 | |
1172 | general &= ~IQS269_SYS_SETTINGS_RESEED_OFFSET; |
1173 | if (device_property_present(dev: &client->dev, propname: "azoteq,reseed-offset" )) |
1174 | general |= IQS269_SYS_SETTINGS_RESEED_OFFSET; |
1175 | |
1176 | general |= IQS269_SYS_SETTINGS_EVENT_MODE; |
1177 | |
1178 | /* |
1179 | * As per the datasheet, enable streaming during normal-power mode if |
1180 | * raw coordinates will be read from either slider. In that case, the |
1181 | * device returns to event mode during low-power mode. |
1182 | */ |
1183 | if (iqs269_slider_type(iqs269, slider_num: 0) == IQS269_SLIDER_RAW || |
1184 | iqs269_slider_type(iqs269, slider_num: 1) == IQS269_SLIDER_RAW) |
1185 | general |= IQS269_SYS_SETTINGS_EVENT_MODE_LP; |
1186 | |
1187 | general |= IQS269_SYS_SETTINGS_REDO_ATI; |
1188 | general |= IQS269_SYS_SETTINGS_ACK_RESET; |
1189 | |
1190 | sys_reg->general = cpu_to_be16(general); |
1191 | |
1192 | return 0; |
1193 | } |
1194 | |
1195 | static const struct reg_sequence iqs269_tws_init[] = { |
1196 | { IQS269_TOUCH_HOLD_SLIDER_SEL, IQS269_TOUCH_HOLD_DEFAULT }, |
1197 | { 0xF0, 0x580F }, |
1198 | { 0xF0, 0x59EF }, |
1199 | }; |
1200 | |
1201 | static int iqs269_dev_init(struct iqs269_private *iqs269) |
1202 | { |
1203 | int error; |
1204 | |
1205 | mutex_lock(&iqs269->lock); |
1206 | |
1207 | /* |
1208 | * Early revisions of silicon require the following workaround in order |
1209 | * to restore any OTP-enabled functionality after a soft reset. |
1210 | */ |
1211 | if (iqs269->otp_option == IQS269_OTP_OPTION_TWS && |
1212 | iqs269->ver_info.fw_num < IQS269_VER_INFO_FW_NUM_3) { |
1213 | error = regmap_multi_reg_write(map: iqs269->regmap, regs: iqs269_tws_init, |
1214 | ARRAY_SIZE(iqs269_tws_init)); |
1215 | if (error) |
1216 | goto err_mutex; |
1217 | } |
1218 | |
1219 | error = regmap_update_bits(map: iqs269->regmap, IQS269_HALL_UI, |
1220 | IQS269_HALL_UI_ENABLE, |
1221 | val: iqs269->hall_enable ? ~0 : 0); |
1222 | if (error) |
1223 | goto err_mutex; |
1224 | |
1225 | error = regmap_raw_write(map: iqs269->regmap, IQS269_SYS_SETTINGS, |
1226 | val: &iqs269->sys_reg, val_len: sizeof(iqs269->sys_reg)); |
1227 | if (error) |
1228 | goto err_mutex; |
1229 | |
1230 | /* |
1231 | * The following delay gives the device time to deassert its RDY output |
1232 | * so as to prevent an interrupt from being serviced prematurely. |
1233 | */ |
1234 | usleep_range(min: 2000, max: 2100); |
1235 | |
1236 | iqs269->ati_current = true; |
1237 | |
1238 | err_mutex: |
1239 | mutex_unlock(lock: &iqs269->lock); |
1240 | |
1241 | return error; |
1242 | } |
1243 | |
1244 | static int iqs269_input_init(struct iqs269_private *iqs269) |
1245 | { |
1246 | struct i2c_client *client = iqs269->client; |
1247 | unsigned int sw_code, keycode; |
1248 | int error, i, j; |
1249 | |
1250 | iqs269->keypad = devm_input_allocate_device(&client->dev); |
1251 | if (!iqs269->keypad) |
1252 | return -ENOMEM; |
1253 | |
1254 | iqs269->keypad->keycodemax = ARRAY_SIZE(iqs269->keycode); |
1255 | iqs269->keypad->keycode = iqs269->keycode; |
1256 | iqs269->keypad->keycodesize = sizeof(*iqs269->keycode); |
1257 | |
1258 | iqs269->keypad->name = "iqs269a_keypad" ; |
1259 | iqs269->keypad->id.bustype = BUS_I2C; |
1260 | |
1261 | for (i = 0; i < ARRAY_SIZE(iqs269_events); i++) { |
1262 | sw_code = iqs269->switches[i].code; |
1263 | |
1264 | for (j = 0; j < IQS269_NUM_CH; j++) { |
1265 | keycode = iqs269->keycode[i * IQS269_NUM_CH + j]; |
1266 | |
1267 | /* |
1268 | * Hall-effect sensing repurposes a pair of dedicated |
1269 | * channels, only one of which reports events. |
1270 | */ |
1271 | switch (j) { |
1272 | case IQS269_CHx_HALL_ACTIVE: |
1273 | if (iqs269->hall_enable && |
1274 | iqs269->switches[i].enabled) |
1275 | input_set_capability(dev: iqs269->keypad, |
1276 | EV_SW, code: sw_code); |
1277 | fallthrough; |
1278 | |
1279 | case IQS269_CHx_HALL_INACTIVE: |
1280 | if (iqs269->hall_enable) |
1281 | continue; |
1282 | fallthrough; |
1283 | |
1284 | default: |
1285 | if (keycode != KEY_RESERVED) |
1286 | input_set_capability(dev: iqs269->keypad, |
1287 | EV_KEY, code: keycode); |
1288 | } |
1289 | } |
1290 | } |
1291 | |
1292 | for (i = 0; i < IQS269_NUM_SL; i++) { |
1293 | if (iqs269_slider_type(iqs269, slider_num: i) == IQS269_SLIDER_NONE) |
1294 | continue; |
1295 | |
1296 | iqs269->slider[i] = devm_input_allocate_device(&client->dev); |
1297 | if (!iqs269->slider[i]) |
1298 | return -ENOMEM; |
1299 | |
1300 | iqs269->slider[i]->keycodemax = ARRAY_SIZE(iqs269->sl_code[i]); |
1301 | iqs269->slider[i]->keycode = iqs269->sl_code[i]; |
1302 | iqs269->slider[i]->keycodesize = sizeof(**iqs269->sl_code); |
1303 | |
1304 | iqs269->slider[i]->name = i ? "iqs269a_slider_1" |
1305 | : "iqs269a_slider_0" ; |
1306 | iqs269->slider[i]->id.bustype = BUS_I2C; |
1307 | |
1308 | for (j = 0; j < IQS269_NUM_GESTURES; j++) |
1309 | if (iqs269->sl_code[i][j] != KEY_RESERVED) |
1310 | input_set_capability(dev: iqs269->slider[i], EV_KEY, |
1311 | code: iqs269->sl_code[i][j]); |
1312 | |
1313 | /* |
1314 | * Present the slider as a narrow trackpad if one or more chan- |
1315 | * nels have been selected to participate, but no gestures have |
1316 | * been mapped to a keycode. |
1317 | */ |
1318 | if (iqs269_slider_type(iqs269, slider_num: i) == IQS269_SLIDER_RAW) { |
1319 | input_set_capability(dev: iqs269->slider[i], |
1320 | EV_KEY, BTN_TOUCH); |
1321 | input_set_abs_params(dev: iqs269->slider[i], |
1322 | ABS_X, min: 0, max: 255, fuzz: 0, flat: 0); |
1323 | } |
1324 | |
1325 | error = input_register_device(iqs269->slider[i]); |
1326 | if (error) { |
1327 | dev_err(&client->dev, |
1328 | "Failed to register slider %d: %d\n" , i, error); |
1329 | return error; |
1330 | } |
1331 | } |
1332 | |
1333 | return 0; |
1334 | } |
1335 | |
1336 | static int iqs269_report(struct iqs269_private *iqs269) |
1337 | { |
1338 | struct i2c_client *client = iqs269->client; |
1339 | struct iqs269_flags flags; |
1340 | unsigned int sw_code, keycode; |
1341 | int error, i, j; |
1342 | u8 slider_x[IQS269_NUM_SL]; |
1343 | u8 dir_mask, state; |
1344 | |
1345 | error = regmap_raw_read(map: iqs269->regmap, IQS269_SYS_FLAGS, val: &flags, |
1346 | val_len: sizeof(flags)); |
1347 | if (error) { |
1348 | dev_err(&client->dev, "Failed to read device status: %d\n" , |
1349 | error); |
1350 | return error; |
1351 | } |
1352 | |
1353 | /* |
1354 | * The device resets itself if its own watchdog bites, which can happen |
1355 | * in the event of an I2C communication error. In this case, the device |
1356 | * asserts a SHOW_RESET interrupt and all registers must be restored. |
1357 | */ |
1358 | if (be16_to_cpu(flags.system) & IQS269_SYS_FLAGS_SHOW_RESET) { |
1359 | dev_err(&client->dev, "Unexpected device reset\n" ); |
1360 | |
1361 | error = iqs269_dev_init(iqs269); |
1362 | if (error) |
1363 | dev_err(&client->dev, |
1364 | "Failed to re-initialize device: %d\n" , error); |
1365 | |
1366 | return error; |
1367 | } |
1368 | |
1369 | if (be16_to_cpu(flags.system) & IQS269_SYS_FLAGS_IN_ATI) |
1370 | return 0; |
1371 | |
1372 | if (iqs269_slider_type(iqs269, slider_num: 0) == IQS269_SLIDER_RAW || |
1373 | iqs269_slider_type(iqs269, slider_num: 1) == IQS269_SLIDER_RAW) { |
1374 | error = regmap_raw_read(map: iqs269->regmap, IQS269_SLIDER_X, |
1375 | val: slider_x, val_len: sizeof(slider_x)); |
1376 | if (error) { |
1377 | dev_err(&client->dev, |
1378 | "Failed to read slider position: %d\n" , error); |
1379 | return error; |
1380 | } |
1381 | } |
1382 | |
1383 | for (i = 0; i < IQS269_NUM_SL; i++) { |
1384 | flags.gesture >>= (i * IQS269_NUM_GESTURES); |
1385 | |
1386 | switch (iqs269_slider_type(iqs269, slider_num: i)) { |
1387 | case IQS269_SLIDER_NONE: |
1388 | continue; |
1389 | |
1390 | case IQS269_SLIDER_KEY: |
1391 | for (j = 0; j < IQS269_NUM_GESTURES; j++) |
1392 | input_report_key(dev: iqs269->slider[i], |
1393 | code: iqs269->sl_code[i][j], |
1394 | value: flags.gesture & BIT(j)); |
1395 | |
1396 | if (!(flags.gesture & (BIT(IQS269_GESTURE_FLICK_NEG) | |
1397 | BIT(IQS269_GESTURE_FLICK_POS) | |
1398 | BIT(IQS269_GESTURE_TAP)))) |
1399 | break; |
1400 | |
1401 | input_sync(dev: iqs269->slider[i]); |
1402 | |
1403 | /* |
1404 | * Momentary gestures are followed by a complementary |
1405 | * release cycle so as to emulate a full keystroke. |
1406 | */ |
1407 | for (j = 0; j < IQS269_NUM_GESTURES; j++) |
1408 | if (j != IQS269_GESTURE_HOLD) |
1409 | input_report_key(dev: iqs269->slider[i], |
1410 | code: iqs269->sl_code[i][j], |
1411 | value: 0); |
1412 | break; |
1413 | |
1414 | case IQS269_SLIDER_RAW: |
1415 | /* |
1416 | * The slider is considered to be in a state of touch |
1417 | * if any selected channels are in a state of touch. |
1418 | */ |
1419 | state = flags.states[IQS269_ST_OFFS_TOUCH]; |
1420 | state &= iqs269->sys_reg.slider_select[i]; |
1421 | |
1422 | input_report_key(dev: iqs269->slider[i], BTN_TOUCH, value: state); |
1423 | |
1424 | if (state) |
1425 | input_report_abs(dev: iqs269->slider[i], |
1426 | ABS_X, value: slider_x[i]); |
1427 | break; |
1428 | } |
1429 | |
1430 | input_sync(dev: iqs269->slider[i]); |
1431 | } |
1432 | |
1433 | for (i = 0; i < ARRAY_SIZE(iqs269_events); i++) { |
1434 | dir_mask = flags.states[IQS269_ST_OFFS_DIR]; |
1435 | if (!iqs269_events[i].dir_up) |
1436 | dir_mask = ~dir_mask; |
1437 | |
1438 | state = flags.states[iqs269_events[i].st_offs] & dir_mask; |
1439 | |
1440 | sw_code = iqs269->switches[i].code; |
1441 | |
1442 | for (j = 0; j < IQS269_NUM_CH; j++) { |
1443 | keycode = iqs269->keycode[i * IQS269_NUM_CH + j]; |
1444 | |
1445 | switch (j) { |
1446 | case IQS269_CHx_HALL_ACTIVE: |
1447 | if (iqs269->hall_enable && |
1448 | iqs269->switches[i].enabled) |
1449 | input_report_switch(dev: iqs269->keypad, |
1450 | code: sw_code, |
1451 | value: state & BIT(j)); |
1452 | fallthrough; |
1453 | |
1454 | case IQS269_CHx_HALL_INACTIVE: |
1455 | if (iqs269->hall_enable) |
1456 | continue; |
1457 | fallthrough; |
1458 | |
1459 | default: |
1460 | input_report_key(dev: iqs269->keypad, code: keycode, |
1461 | value: state & BIT(j)); |
1462 | } |
1463 | } |
1464 | } |
1465 | |
1466 | input_sync(dev: iqs269->keypad); |
1467 | |
1468 | /* |
1469 | * The following completion signals that ATI has finished, any initial |
1470 | * switch states have been reported and the keypad can be registered. |
1471 | */ |
1472 | complete_all(&iqs269->ati_done); |
1473 | |
1474 | return 0; |
1475 | } |
1476 | |
1477 | static irqreturn_t iqs269_irq(int irq, void *context) |
1478 | { |
1479 | struct iqs269_private *iqs269 = context; |
1480 | |
1481 | if (iqs269_report(iqs269)) |
1482 | return IRQ_NONE; |
1483 | |
1484 | /* |
1485 | * The device does not deassert its interrupt (RDY) pin until shortly |
1486 | * after receiving an I2C stop condition; the following delay ensures |
1487 | * the interrupt handler does not return before this time. |
1488 | */ |
1489 | iqs269_irq_wait(); |
1490 | |
1491 | return IRQ_HANDLED; |
1492 | } |
1493 | |
1494 | static ssize_t counts_show(struct device *dev, |
1495 | struct device_attribute *attr, char *buf) |
1496 | { |
1497 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1498 | struct i2c_client *client = iqs269->client; |
1499 | __le16 counts; |
1500 | int error; |
1501 | |
1502 | if (!iqs269->ati_current || iqs269->hall_enable) |
1503 | return -EPERM; |
1504 | |
1505 | if (!completion_done(x: &iqs269->ati_done)) |
1506 | return -EBUSY; |
1507 | |
1508 | /* |
1509 | * Unsolicited I2C communication prompts the device to assert its RDY |
1510 | * pin, so disable the interrupt line until the operation is finished |
1511 | * and RDY has been deasserted. |
1512 | */ |
1513 | disable_irq(irq: client->irq); |
1514 | |
1515 | error = regmap_raw_read(map: iqs269->regmap, |
1516 | IQS269_CHx_COUNTS + iqs269->ch_num * 2, |
1517 | val: &counts, val_len: sizeof(counts)); |
1518 | |
1519 | iqs269_irq_wait(); |
1520 | enable_irq(irq: client->irq); |
1521 | |
1522 | if (error) |
1523 | return error; |
1524 | |
1525 | return sysfs_emit(buf, fmt: "%u\n" , le16_to_cpu(counts)); |
1526 | } |
1527 | |
1528 | static ssize_t hall_bin_show(struct device *dev, |
1529 | struct device_attribute *attr, char *buf) |
1530 | { |
1531 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1532 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
1533 | struct i2c_client *client = iqs269->client; |
1534 | unsigned int val; |
1535 | int error; |
1536 | |
1537 | disable_irq(irq: client->irq); |
1538 | |
1539 | error = regmap_read(map: iqs269->regmap, IQS269_CAL_DATA_A, val: &val); |
1540 | |
1541 | iqs269_irq_wait(); |
1542 | enable_irq(irq: client->irq); |
1543 | |
1544 | if (error) |
1545 | return error; |
1546 | |
1547 | switch (ch_reg[IQS269_CHx_HALL_ACTIVE].rx_enable & |
1548 | ch_reg[IQS269_CHx_HALL_INACTIVE].rx_enable) { |
1549 | case IQS269_HALL_PAD_R: |
1550 | val &= IQS269_CAL_DATA_A_HALL_BIN_R_MASK; |
1551 | val >>= IQS269_CAL_DATA_A_HALL_BIN_R_SHIFT; |
1552 | break; |
1553 | |
1554 | case IQS269_HALL_PAD_L: |
1555 | val &= IQS269_CAL_DATA_A_HALL_BIN_L_MASK; |
1556 | val >>= IQS269_CAL_DATA_A_HALL_BIN_L_SHIFT; |
1557 | break; |
1558 | |
1559 | default: |
1560 | return -EINVAL; |
1561 | } |
1562 | |
1563 | return sysfs_emit(buf, fmt: "%u\n" , val); |
1564 | } |
1565 | |
1566 | static ssize_t hall_enable_show(struct device *dev, |
1567 | struct device_attribute *attr, char *buf) |
1568 | { |
1569 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1570 | |
1571 | return sysfs_emit(buf, fmt: "%u\n" , iqs269->hall_enable); |
1572 | } |
1573 | |
1574 | static ssize_t hall_enable_store(struct device *dev, |
1575 | struct device_attribute *attr, const char *buf, |
1576 | size_t count) |
1577 | { |
1578 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1579 | unsigned int val; |
1580 | int error; |
1581 | |
1582 | error = kstrtouint(s: buf, base: 10, res: &val); |
1583 | if (error) |
1584 | return error; |
1585 | |
1586 | mutex_lock(&iqs269->lock); |
1587 | |
1588 | iqs269->hall_enable = val; |
1589 | iqs269->ati_current = false; |
1590 | |
1591 | mutex_unlock(lock: &iqs269->lock); |
1592 | |
1593 | return count; |
1594 | } |
1595 | |
1596 | static ssize_t ch_number_show(struct device *dev, |
1597 | struct device_attribute *attr, char *buf) |
1598 | { |
1599 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1600 | |
1601 | return sysfs_emit(buf, fmt: "%u\n" , iqs269->ch_num); |
1602 | } |
1603 | |
1604 | static ssize_t ch_number_store(struct device *dev, |
1605 | struct device_attribute *attr, const char *buf, |
1606 | size_t count) |
1607 | { |
1608 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1609 | unsigned int val; |
1610 | int error; |
1611 | |
1612 | error = kstrtouint(s: buf, base: 10, res: &val); |
1613 | if (error) |
1614 | return error; |
1615 | |
1616 | if (val >= IQS269_NUM_CH) |
1617 | return -EINVAL; |
1618 | |
1619 | iqs269->ch_num = val; |
1620 | |
1621 | return count; |
1622 | } |
1623 | |
1624 | static ssize_t rx_enable_show(struct device *dev, |
1625 | struct device_attribute *attr, char *buf) |
1626 | { |
1627 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1628 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
1629 | |
1630 | return sysfs_emit(buf, fmt: "%u\n" , ch_reg[iqs269->ch_num].rx_enable); |
1631 | } |
1632 | |
1633 | static ssize_t rx_enable_store(struct device *dev, |
1634 | struct device_attribute *attr, const char *buf, |
1635 | size_t count) |
1636 | { |
1637 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1638 | struct iqs269_ch_reg *ch_reg = iqs269->sys_reg.ch_reg; |
1639 | unsigned int val; |
1640 | int error; |
1641 | |
1642 | error = kstrtouint(s: buf, base: 10, res: &val); |
1643 | if (error) |
1644 | return error; |
1645 | |
1646 | if (val > 0xFF) |
1647 | return -EINVAL; |
1648 | |
1649 | mutex_lock(&iqs269->lock); |
1650 | |
1651 | ch_reg[iqs269->ch_num].rx_enable = val; |
1652 | iqs269->ati_current = false; |
1653 | |
1654 | mutex_unlock(lock: &iqs269->lock); |
1655 | |
1656 | return count; |
1657 | } |
1658 | |
1659 | static ssize_t ati_mode_show(struct device *dev, |
1660 | struct device_attribute *attr, char *buf) |
1661 | { |
1662 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1663 | unsigned int val; |
1664 | int error; |
1665 | |
1666 | error = iqs269_ati_mode_get(iqs269, ch_num: iqs269->ch_num, mode: &val); |
1667 | if (error) |
1668 | return error; |
1669 | |
1670 | return sysfs_emit(buf, fmt: "%u\n" , val); |
1671 | } |
1672 | |
1673 | static ssize_t ati_mode_store(struct device *dev, |
1674 | struct device_attribute *attr, const char *buf, |
1675 | size_t count) |
1676 | { |
1677 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1678 | unsigned int val; |
1679 | int error; |
1680 | |
1681 | error = kstrtouint(s: buf, base: 10, res: &val); |
1682 | if (error) |
1683 | return error; |
1684 | |
1685 | error = iqs269_ati_mode_set(iqs269, ch_num: iqs269->ch_num, mode: val); |
1686 | if (error) |
1687 | return error; |
1688 | |
1689 | return count; |
1690 | } |
1691 | |
1692 | static ssize_t ati_base_show(struct device *dev, |
1693 | struct device_attribute *attr, char *buf) |
1694 | { |
1695 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1696 | unsigned int val; |
1697 | int error; |
1698 | |
1699 | error = iqs269_ati_base_get(iqs269, ch_num: iqs269->ch_num, base: &val); |
1700 | if (error) |
1701 | return error; |
1702 | |
1703 | return sysfs_emit(buf, fmt: "%u\n" , val); |
1704 | } |
1705 | |
1706 | static ssize_t ati_base_store(struct device *dev, |
1707 | struct device_attribute *attr, const char *buf, |
1708 | size_t count) |
1709 | { |
1710 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1711 | unsigned int val; |
1712 | int error; |
1713 | |
1714 | error = kstrtouint(s: buf, base: 10, res: &val); |
1715 | if (error) |
1716 | return error; |
1717 | |
1718 | error = iqs269_ati_base_set(iqs269, ch_num: iqs269->ch_num, base: val); |
1719 | if (error) |
1720 | return error; |
1721 | |
1722 | return count; |
1723 | } |
1724 | |
1725 | static ssize_t ati_target_show(struct device *dev, |
1726 | struct device_attribute *attr, char *buf) |
1727 | { |
1728 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1729 | unsigned int val; |
1730 | int error; |
1731 | |
1732 | error = iqs269_ati_target_get(iqs269, ch_num: iqs269->ch_num, target: &val); |
1733 | if (error) |
1734 | return error; |
1735 | |
1736 | return sysfs_emit(buf, fmt: "%u\n" , val); |
1737 | } |
1738 | |
1739 | static ssize_t ati_target_store(struct device *dev, |
1740 | struct device_attribute *attr, const char *buf, |
1741 | size_t count) |
1742 | { |
1743 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1744 | unsigned int val; |
1745 | int error; |
1746 | |
1747 | error = kstrtouint(s: buf, base: 10, res: &val); |
1748 | if (error) |
1749 | return error; |
1750 | |
1751 | error = iqs269_ati_target_set(iqs269, ch_num: iqs269->ch_num, target: val); |
1752 | if (error) |
1753 | return error; |
1754 | |
1755 | return count; |
1756 | } |
1757 | |
1758 | static ssize_t ati_trigger_show(struct device *dev, |
1759 | struct device_attribute *attr, char *buf) |
1760 | { |
1761 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1762 | |
1763 | return sysfs_emit(buf, fmt: "%u\n" , |
1764 | iqs269->ati_current && |
1765 | completion_done(x: &iqs269->ati_done)); |
1766 | } |
1767 | |
1768 | static ssize_t ati_trigger_store(struct device *dev, |
1769 | struct device_attribute *attr, const char *buf, |
1770 | size_t count) |
1771 | { |
1772 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1773 | struct i2c_client *client = iqs269->client; |
1774 | unsigned int val; |
1775 | int error; |
1776 | |
1777 | error = kstrtouint(s: buf, base: 10, res: &val); |
1778 | if (error) |
1779 | return error; |
1780 | |
1781 | if (!val) |
1782 | return count; |
1783 | |
1784 | disable_irq(irq: client->irq); |
1785 | reinit_completion(x: &iqs269->ati_done); |
1786 | |
1787 | error = iqs269_dev_init(iqs269); |
1788 | |
1789 | iqs269_irq_wait(); |
1790 | enable_irq(irq: client->irq); |
1791 | |
1792 | if (error) |
1793 | return error; |
1794 | |
1795 | if (!wait_for_completion_timeout(x: &iqs269->ati_done, |
1796 | timeout: msecs_to_jiffies(m: 2000))) |
1797 | return -ETIMEDOUT; |
1798 | |
1799 | return count; |
1800 | } |
1801 | |
1802 | static DEVICE_ATTR_RO(counts); |
1803 | static DEVICE_ATTR_RO(hall_bin); |
1804 | static DEVICE_ATTR_RW(hall_enable); |
1805 | static DEVICE_ATTR_RW(ch_number); |
1806 | static DEVICE_ATTR_RW(rx_enable); |
1807 | static DEVICE_ATTR_RW(ati_mode); |
1808 | static DEVICE_ATTR_RW(ati_base); |
1809 | static DEVICE_ATTR_RW(ati_target); |
1810 | static DEVICE_ATTR_RW(ati_trigger); |
1811 | |
1812 | static struct attribute *iqs269_attrs[] = { |
1813 | &dev_attr_counts.attr, |
1814 | &dev_attr_hall_bin.attr, |
1815 | &dev_attr_hall_enable.attr, |
1816 | &dev_attr_ch_number.attr, |
1817 | &dev_attr_rx_enable.attr, |
1818 | &dev_attr_ati_mode.attr, |
1819 | &dev_attr_ati_base.attr, |
1820 | &dev_attr_ati_target.attr, |
1821 | &dev_attr_ati_trigger.attr, |
1822 | NULL, |
1823 | }; |
1824 | ATTRIBUTE_GROUPS(iqs269); |
1825 | |
1826 | static const struct regmap_config iqs269_regmap_config = { |
1827 | .reg_bits = 8, |
1828 | .val_bits = 16, |
1829 | .max_register = IQS269_MAX_REG, |
1830 | }; |
1831 | |
1832 | static int iqs269_probe(struct i2c_client *client) |
1833 | { |
1834 | struct iqs269_private *iqs269; |
1835 | int error; |
1836 | |
1837 | iqs269 = devm_kzalloc(dev: &client->dev, size: sizeof(*iqs269), GFP_KERNEL); |
1838 | if (!iqs269) |
1839 | return -ENOMEM; |
1840 | |
1841 | i2c_set_clientdata(client, data: iqs269); |
1842 | iqs269->client = client; |
1843 | |
1844 | iqs269->regmap = devm_regmap_init_i2c(client, &iqs269_regmap_config); |
1845 | if (IS_ERR(ptr: iqs269->regmap)) { |
1846 | error = PTR_ERR(ptr: iqs269->regmap); |
1847 | dev_err(&client->dev, "Failed to initialize register map: %d\n" , |
1848 | error); |
1849 | return error; |
1850 | } |
1851 | |
1852 | mutex_init(&iqs269->lock); |
1853 | init_completion(x: &iqs269->ati_done); |
1854 | |
1855 | iqs269->otp_option = (uintptr_t)device_get_match_data(dev: &client->dev); |
1856 | |
1857 | error = regmap_raw_read(map: iqs269->regmap, IQS269_VER_INFO, |
1858 | val: &iqs269->ver_info, val_len: sizeof(iqs269->ver_info)); |
1859 | if (error) |
1860 | return error; |
1861 | |
1862 | if (iqs269->ver_info.prod_num != IQS269_VER_INFO_PROD_NUM) { |
1863 | dev_err(&client->dev, "Unrecognized product number: 0x%02X\n" , |
1864 | iqs269->ver_info.prod_num); |
1865 | return -EINVAL; |
1866 | } |
1867 | |
1868 | error = iqs269_parse_prop(iqs269); |
1869 | if (error) |
1870 | return error; |
1871 | |
1872 | error = iqs269_dev_init(iqs269); |
1873 | if (error) { |
1874 | dev_err(&client->dev, "Failed to initialize device: %d\n" , |
1875 | error); |
1876 | return error; |
1877 | } |
1878 | |
1879 | error = iqs269_input_init(iqs269); |
1880 | if (error) |
1881 | return error; |
1882 | |
1883 | error = devm_request_threaded_irq(dev: &client->dev, irq: client->irq, |
1884 | NULL, thread_fn: iqs269_irq, IRQF_ONESHOT, |
1885 | devname: client->name, dev_id: iqs269); |
1886 | if (error) { |
1887 | dev_err(&client->dev, "Failed to request IRQ: %d\n" , error); |
1888 | return error; |
1889 | } |
1890 | |
1891 | if (!wait_for_completion_timeout(x: &iqs269->ati_done, |
1892 | timeout: msecs_to_jiffies(m: 2000))) { |
1893 | dev_err(&client->dev, "Failed to complete ATI\n" ); |
1894 | return -ETIMEDOUT; |
1895 | } |
1896 | |
1897 | /* |
1898 | * The keypad may include one or more switches and is not registered |
1899 | * until ATI is complete and the initial switch states are read. |
1900 | */ |
1901 | error = input_register_device(iqs269->keypad); |
1902 | if (error) { |
1903 | dev_err(&client->dev, "Failed to register keypad: %d\n" , error); |
1904 | return error; |
1905 | } |
1906 | |
1907 | return error; |
1908 | } |
1909 | |
1910 | static u16 iqs269_general_get(struct iqs269_private *iqs269) |
1911 | { |
1912 | u16 general = be16_to_cpu(iqs269->sys_reg.general); |
1913 | |
1914 | general &= ~IQS269_SYS_SETTINGS_REDO_ATI; |
1915 | general &= ~IQS269_SYS_SETTINGS_ACK_RESET; |
1916 | |
1917 | return general | IQS269_SYS_SETTINGS_DIS_AUTO; |
1918 | } |
1919 | |
1920 | static int iqs269_suspend(struct device *dev) |
1921 | { |
1922 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1923 | struct i2c_client *client = iqs269->client; |
1924 | int error; |
1925 | u16 general = iqs269_general_get(iqs269); |
1926 | |
1927 | if (!(general & IQS269_SYS_SETTINGS_PWR_MODE_MASK)) |
1928 | return 0; |
1929 | |
1930 | disable_irq(irq: client->irq); |
1931 | |
1932 | error = regmap_write(map: iqs269->regmap, IQS269_SYS_SETTINGS, val: general); |
1933 | |
1934 | iqs269_irq_wait(); |
1935 | enable_irq(irq: client->irq); |
1936 | |
1937 | return error; |
1938 | } |
1939 | |
1940 | static int iqs269_resume(struct device *dev) |
1941 | { |
1942 | struct iqs269_private *iqs269 = dev_get_drvdata(dev); |
1943 | struct i2c_client *client = iqs269->client; |
1944 | int error; |
1945 | u16 general = iqs269_general_get(iqs269); |
1946 | |
1947 | if (!(general & IQS269_SYS_SETTINGS_PWR_MODE_MASK)) |
1948 | return 0; |
1949 | |
1950 | disable_irq(irq: client->irq); |
1951 | |
1952 | error = regmap_write(map: iqs269->regmap, IQS269_SYS_SETTINGS, |
1953 | val: general & ~IQS269_SYS_SETTINGS_PWR_MODE_MASK); |
1954 | if (!error) |
1955 | error = regmap_write(map: iqs269->regmap, IQS269_SYS_SETTINGS, |
1956 | val: general & ~IQS269_SYS_SETTINGS_DIS_AUTO); |
1957 | |
1958 | iqs269_irq_wait(); |
1959 | enable_irq(irq: client->irq); |
1960 | |
1961 | return error; |
1962 | } |
1963 | |
1964 | static DEFINE_SIMPLE_DEV_PM_OPS(iqs269_pm, iqs269_suspend, iqs269_resume); |
1965 | |
1966 | static const struct of_device_id iqs269_of_match[] = { |
1967 | { |
1968 | .compatible = "azoteq,iqs269a" , |
1969 | .data = (void *)IQS269_OTP_OPTION_DEFAULT, |
1970 | }, |
1971 | { |
1972 | .compatible = "azoteq,iqs269a-00" , |
1973 | .data = (void *)IQS269_OTP_OPTION_DEFAULT, |
1974 | }, |
1975 | { |
1976 | .compatible = "azoteq,iqs269a-d0" , |
1977 | .data = (void *)IQS269_OTP_OPTION_TWS, |
1978 | }, |
1979 | { } |
1980 | }; |
1981 | MODULE_DEVICE_TABLE(of, iqs269_of_match); |
1982 | |
1983 | static struct i2c_driver iqs269_i2c_driver = { |
1984 | .driver = { |
1985 | .name = "iqs269a" , |
1986 | .dev_groups = iqs269_groups, |
1987 | .of_match_table = iqs269_of_match, |
1988 | .pm = pm_sleep_ptr(&iqs269_pm), |
1989 | }, |
1990 | .probe = iqs269_probe, |
1991 | }; |
1992 | module_i2c_driver(iqs269_i2c_driver); |
1993 | |
1994 | MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>" ); |
1995 | MODULE_DESCRIPTION("Azoteq IQS269A Capacitive Touch Controller" ); |
1996 | MODULE_LICENSE("GPL" ); |
1997 | |