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39325b59 TS |
1 | /* Copyright (c) 2009-2011, Code Aurora Forum. All rights reserved. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License version 2 and | |
5 | * only version 2 as published by the Free Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/input.h> | |
19 | #include <linux/bitops.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/mutex.h> | |
22 | ||
23 | #include <linux/mfd/pm8xxx/core.h> | |
24 | #include <linux/mfd/pm8xxx/gpio.h> | |
25 | #include <linux/input/pmic8xxx-keypad.h> | |
26 | ||
27 | #define PM8XXX_MAX_ROWS 18 | |
28 | #define PM8XXX_MAX_COLS 8 | |
29 | #define PM8XXX_ROW_SHIFT 3 | |
30 | #define PM8XXX_MATRIX_MAX_SIZE (PM8XXX_MAX_ROWS * PM8XXX_MAX_COLS) | |
31 | ||
32 | #define PM8XXX_MIN_ROWS 5 | |
33 | #define PM8XXX_MIN_COLS 5 | |
34 | ||
35 | #define MAX_SCAN_DELAY 128 | |
36 | #define MIN_SCAN_DELAY 1 | |
37 | ||
38 | /* in nanoseconds */ | |
39 | #define MAX_ROW_HOLD_DELAY 122000 | |
40 | #define MIN_ROW_HOLD_DELAY 30500 | |
41 | ||
42 | #define MAX_DEBOUNCE_TIME 20 | |
43 | #define MIN_DEBOUNCE_TIME 5 | |
44 | ||
45 | #define KEYP_CTRL 0x148 | |
46 | ||
47 | #define KEYP_CTRL_EVNTS BIT(0) | |
48 | #define KEYP_CTRL_EVNTS_MASK 0x3 | |
49 | ||
50 | #define KEYP_CTRL_SCAN_COLS_SHIFT 5 | |
51 | #define KEYP_CTRL_SCAN_COLS_MIN 5 | |
52 | #define KEYP_CTRL_SCAN_COLS_BITS 0x3 | |
53 | ||
54 | #define KEYP_CTRL_SCAN_ROWS_SHIFT 2 | |
55 | #define KEYP_CTRL_SCAN_ROWS_MIN 5 | |
56 | #define KEYP_CTRL_SCAN_ROWS_BITS 0x7 | |
57 | ||
58 | #define KEYP_CTRL_KEYP_EN BIT(7) | |
59 | ||
60 | #define KEYP_SCAN 0x149 | |
61 | ||
62 | #define KEYP_SCAN_READ_STATE BIT(0) | |
63 | #define KEYP_SCAN_DBOUNCE_SHIFT 1 | |
64 | #define KEYP_SCAN_PAUSE_SHIFT 3 | |
65 | #define KEYP_SCAN_ROW_HOLD_SHIFT 6 | |
66 | ||
67 | #define KEYP_TEST 0x14A | |
68 | ||
69 | #define KEYP_TEST_CLEAR_RECENT_SCAN BIT(6) | |
70 | #define KEYP_TEST_CLEAR_OLD_SCAN BIT(5) | |
71 | #define KEYP_TEST_READ_RESET BIT(4) | |
72 | #define KEYP_TEST_DTEST_EN BIT(3) | |
73 | #define KEYP_TEST_ABORT_READ BIT(0) | |
74 | ||
75 | #define KEYP_TEST_DBG_SELECT_SHIFT 1 | |
76 | ||
77 | /* bits of these registers represent | |
78 | * '0' for key press | |
79 | * '1' for key release | |
80 | */ | |
81 | #define KEYP_RECENT_DATA 0x14B | |
82 | #define KEYP_OLD_DATA 0x14C | |
83 | ||
84 | #define KEYP_CLOCK_FREQ 32768 | |
85 | ||
86 | /** | |
87 | * struct pmic8xxx_kp - internal keypad data structure | |
88 | * @pdata - keypad platform data pointer | |
89 | * @input - input device pointer for keypad | |
90 | * @key_sense_irq - key press/release irq number | |
91 | * @key_stuck_irq - key stuck notification irq number | |
92 | * @keycodes - array to hold the key codes | |
93 | * @dev - parent device pointer | |
94 | * @keystate - present key press/release state | |
95 | * @stuckstate - present state when key stuck irq | |
96 | * @ctrl_reg - control register value | |
97 | */ | |
98 | struct pmic8xxx_kp { | |
99 | const struct pm8xxx_keypad_platform_data *pdata; | |
100 | struct input_dev *input; | |
101 | int key_sense_irq; | |
102 | int key_stuck_irq; | |
103 | ||
104 | unsigned short keycodes[PM8XXX_MATRIX_MAX_SIZE]; | |
105 | ||
106 | struct device *dev; | |
107 | u16 keystate[PM8XXX_MAX_ROWS]; | |
108 | u16 stuckstate[PM8XXX_MAX_ROWS]; | |
109 | ||
110 | u8 ctrl_reg; | |
111 | }; | |
112 | ||
113 | static int pmic8xxx_kp_write_u8(struct pmic8xxx_kp *kp, | |
114 | u8 data, u16 reg) | |
115 | { | |
116 | int rc; | |
117 | ||
118 | rc = pm8xxx_writeb(kp->dev->parent, reg, data); | |
119 | return rc; | |
120 | } | |
121 | ||
122 | static int pmic8xxx_kp_read(struct pmic8xxx_kp *kp, | |
123 | u8 *data, u16 reg, unsigned num_bytes) | |
124 | { | |
125 | int rc; | |
126 | ||
127 | rc = pm8xxx_read_buf(kp->dev->parent, reg, data, num_bytes); | |
128 | return rc; | |
129 | } | |
130 | ||
131 | static int pmic8xxx_kp_read_u8(struct pmic8xxx_kp *kp, | |
132 | u8 *data, u16 reg) | |
133 | { | |
134 | int rc; | |
135 | ||
136 | rc = pmic8xxx_kp_read(kp, data, reg, 1); | |
137 | return rc; | |
138 | } | |
139 | ||
140 | static u8 pmic8xxx_col_state(struct pmic8xxx_kp *kp, u8 col) | |
141 | { | |
142 | /* all keys pressed on that particular row? */ | |
143 | if (col == 0x00) | |
144 | return 1 << kp->pdata->num_cols; | |
145 | else | |
146 | return col & ((1 << kp->pdata->num_cols) - 1); | |
147 | } | |
148 | ||
149 | /* | |
150 | * Synchronous read protocol for RevB0 onwards: | |
151 | * | |
152 | * 1. Write '1' to ReadState bit in KEYP_SCAN register | |
153 | * 2. Wait 2*32KHz clocks, so that HW can successfully enter read mode | |
154 | * synchronously | |
155 | * 3. Read rows in old array first if events are more than one | |
156 | * 4. Read rows in recent array | |
157 | * 5. Wait 4*32KHz clocks | |
158 | * 6. Write '0' to ReadState bit of KEYP_SCAN register so that hw can | |
159 | * synchronously exit read mode. | |
160 | */ | |
161 | static int pmic8xxx_chk_sync_read(struct pmic8xxx_kp *kp) | |
162 | { | |
163 | int rc; | |
164 | u8 scan_val; | |
165 | ||
166 | rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN); | |
167 | if (rc < 0) { | |
168 | dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc); | |
169 | return rc; | |
170 | } | |
171 | ||
172 | scan_val |= 0x1; | |
173 | ||
174 | rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN); | |
175 | if (rc < 0) { | |
176 | dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); | |
177 | return rc; | |
178 | } | |
179 | ||
180 | /* 2 * 32KHz clocks */ | |
181 | udelay((2 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); | |
182 | ||
183 | return rc; | |
184 | } | |
185 | ||
186 | static int pmic8xxx_kp_read_data(struct pmic8xxx_kp *kp, u16 *state, | |
187 | u16 data_reg, int read_rows) | |
188 | { | |
189 | int rc, row; | |
190 | u8 new_data[PM8XXX_MAX_ROWS]; | |
191 | ||
192 | rc = pmic8xxx_kp_read(kp, new_data, data_reg, read_rows); | |
193 | if (rc) | |
194 | return rc; | |
195 | ||
196 | for (row = 0; row < kp->pdata->num_rows; row++) { | |
197 | dev_dbg(kp->dev, "new_data[%d] = %d\n", row, | |
198 | new_data[row]); | |
199 | state[row] = pmic8xxx_col_state(kp, new_data[row]); | |
200 | } | |
201 | ||
202 | return rc; | |
203 | } | |
204 | ||
205 | static int pmic8xxx_kp_read_matrix(struct pmic8xxx_kp *kp, u16 *new_state, | |
206 | u16 *old_state) | |
207 | { | |
208 | int rc, read_rows; | |
209 | u8 scan_val; | |
210 | ||
211 | if (kp->pdata->num_rows < PM8XXX_MIN_ROWS) | |
212 | read_rows = PM8XXX_MIN_ROWS; | |
213 | else | |
214 | read_rows = kp->pdata->num_rows; | |
215 | ||
216 | pmic8xxx_chk_sync_read(kp); | |
217 | ||
218 | if (old_state) { | |
219 | rc = pmic8xxx_kp_read_data(kp, old_state, KEYP_OLD_DATA, | |
220 | read_rows); | |
221 | if (rc < 0) { | |
222 | dev_err(kp->dev, | |
223 | "Error reading KEYP_OLD_DATA, rc=%d\n", rc); | |
224 | return rc; | |
225 | } | |
226 | } | |
227 | ||
228 | rc = pmic8xxx_kp_read_data(kp, new_state, KEYP_RECENT_DATA, | |
229 | read_rows); | |
230 | if (rc < 0) { | |
231 | dev_err(kp->dev, | |
232 | "Error reading KEYP_RECENT_DATA, rc=%d\n", rc); | |
233 | return rc; | |
234 | } | |
235 | ||
236 | /* 4 * 32KHz clocks */ | |
237 | udelay((4 * DIV_ROUND_UP(USEC_PER_SEC, KEYP_CLOCK_FREQ)) + 1); | |
238 | ||
239 | rc = pmic8xxx_kp_read_u8(kp, &scan_val, KEYP_SCAN); | |
240 | if (rc < 0) { | |
241 | dev_err(kp->dev, "Error reading KEYP_SCAN reg, rc=%d\n", rc); | |
242 | return rc; | |
243 | } | |
244 | ||
245 | scan_val &= 0xFE; | |
246 | rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN); | |
247 | if (rc < 0) | |
248 | dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); | |
249 | ||
250 | return rc; | |
251 | } | |
252 | ||
253 | static void __pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, u16 *new_state, | |
254 | u16 *old_state) | |
255 | { | |
256 | int row, col, code; | |
257 | ||
258 | for (row = 0; row < kp->pdata->num_rows; row++) { | |
259 | int bits_changed = new_state[row] ^ old_state[row]; | |
260 | ||
261 | if (!bits_changed) | |
262 | continue; | |
263 | ||
264 | for (col = 0; col < kp->pdata->num_cols; col++) { | |
265 | if (!(bits_changed & (1 << col))) | |
266 | continue; | |
267 | ||
268 | dev_dbg(kp->dev, "key [%d:%d] %s\n", row, col, | |
269 | !(new_state[row] & (1 << col)) ? | |
270 | "pressed" : "released"); | |
271 | ||
272 | code = MATRIX_SCAN_CODE(row, col, PM8XXX_ROW_SHIFT); | |
273 | ||
274 | input_event(kp->input, EV_MSC, MSC_SCAN, code); | |
275 | input_report_key(kp->input, | |
276 | kp->keycodes[code], | |
277 | !(new_state[row] & (1 << col))); | |
278 | ||
279 | input_sync(kp->input); | |
280 | } | |
281 | } | |
282 | } | |
283 | ||
284 | static bool pmic8xxx_detect_ghost_keys(struct pmic8xxx_kp *kp, u16 *new_state) | |
285 | { | |
286 | int row, found_first = -1; | |
287 | u16 check, row_state; | |
288 | ||
289 | check = 0; | |
290 | for (row = 0; row < kp->pdata->num_rows; row++) { | |
291 | row_state = (~new_state[row]) & | |
292 | ((1 << kp->pdata->num_cols) - 1); | |
293 | ||
294 | if (hweight16(row_state) > 1) { | |
295 | if (found_first == -1) | |
296 | found_first = row; | |
297 | if (check & row_state) { | |
298 | dev_dbg(kp->dev, "detected ghost key on row[%d]" | |
299 | " and row[%d]\n", found_first, row); | |
300 | return true; | |
301 | } | |
302 | } | |
303 | check |= row_state; | |
304 | } | |
305 | return false; | |
306 | } | |
307 | ||
308 | static int pmic8xxx_kp_scan_matrix(struct pmic8xxx_kp *kp, unsigned int events) | |
309 | { | |
310 | u16 new_state[PM8XXX_MAX_ROWS]; | |
311 | u16 old_state[PM8XXX_MAX_ROWS]; | |
312 | int rc; | |
313 | ||
314 | switch (events) { | |
315 | case 0x1: | |
316 | rc = pmic8xxx_kp_read_matrix(kp, new_state, NULL); | |
317 | if (rc < 0) | |
318 | return rc; | |
319 | ||
320 | /* detecting ghost key is not an error */ | |
321 | if (pmic8xxx_detect_ghost_keys(kp, new_state)) | |
322 | return 0; | |
323 | __pmic8xxx_kp_scan_matrix(kp, new_state, kp->keystate); | |
324 | memcpy(kp->keystate, new_state, sizeof(new_state)); | |
325 | break; | |
326 | case 0x3: /* two events - eventcounter is gray-coded */ | |
327 | rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); | |
328 | if (rc < 0) | |
329 | return rc; | |
330 | ||
331 | __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate); | |
332 | __pmic8xxx_kp_scan_matrix(kp, new_state, old_state); | |
333 | memcpy(kp->keystate, new_state, sizeof(new_state)); | |
334 | break; | |
335 | case 0x2: | |
336 | dev_dbg(kp->dev, "Some key events were lost\n"); | |
337 | rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); | |
338 | if (rc < 0) | |
339 | return rc; | |
340 | __pmic8xxx_kp_scan_matrix(kp, old_state, kp->keystate); | |
341 | __pmic8xxx_kp_scan_matrix(kp, new_state, old_state); | |
342 | memcpy(kp->keystate, new_state, sizeof(new_state)); | |
343 | break; | |
344 | default: | |
345 | rc = -EINVAL; | |
346 | } | |
347 | return rc; | |
348 | } | |
349 | ||
350 | /* | |
351 | * NOTE: We are reading recent and old data registers blindly | |
352 | * whenever key-stuck interrupt happens, because events counter doesn't | |
353 | * get updated when this interrupt happens due to key stuck doesn't get | |
354 | * considered as key state change. | |
355 | * | |
356 | * We are not using old data register contents after they are being read | |
357 | * because it might report the key which was pressed before the key being stuck | |
358 | * as stuck key because it's pressed status is stored in the old data | |
359 | * register. | |
360 | */ | |
361 | static irqreturn_t pmic8xxx_kp_stuck_irq(int irq, void *data) | |
362 | { | |
363 | u16 new_state[PM8XXX_MAX_ROWS]; | |
364 | u16 old_state[PM8XXX_MAX_ROWS]; | |
365 | int rc; | |
366 | struct pmic8xxx_kp *kp = data; | |
367 | ||
368 | rc = pmic8xxx_kp_read_matrix(kp, new_state, old_state); | |
369 | if (rc < 0) { | |
370 | dev_err(kp->dev, "failed to read keypad matrix\n"); | |
371 | return IRQ_HANDLED; | |
372 | } | |
373 | ||
374 | __pmic8xxx_kp_scan_matrix(kp, new_state, kp->stuckstate); | |
375 | ||
376 | return IRQ_HANDLED; | |
377 | } | |
378 | ||
379 | static irqreturn_t pmic8xxx_kp_irq(int irq, void *data) | |
380 | { | |
381 | struct pmic8xxx_kp *kp = data; | |
382 | u8 ctrl_val, events; | |
383 | int rc; | |
384 | ||
385 | rc = pmic8xxx_kp_read(kp, &ctrl_val, KEYP_CTRL, 1); | |
386 | if (rc < 0) { | |
387 | dev_err(kp->dev, "failed to read keyp_ctrl register\n"); | |
388 | return IRQ_HANDLED; | |
389 | } | |
390 | ||
391 | events = ctrl_val & KEYP_CTRL_EVNTS_MASK; | |
392 | ||
393 | rc = pmic8xxx_kp_scan_matrix(kp, events); | |
394 | if (rc < 0) | |
395 | dev_err(kp->dev, "failed to scan matrix\n"); | |
396 | ||
397 | return IRQ_HANDLED; | |
398 | } | |
399 | ||
400 | static int __devinit pmic8xxx_kpd_init(struct pmic8xxx_kp *kp) | |
401 | { | |
402 | int bits, rc, cycles; | |
403 | u8 scan_val = 0, ctrl_val = 0; | |
404 | static const u8 row_bits[] = { | |
405 | 0, 1, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, | |
406 | }; | |
407 | ||
408 | /* Find column bits */ | |
409 | if (kp->pdata->num_cols < KEYP_CTRL_SCAN_COLS_MIN) | |
410 | bits = 0; | |
411 | else | |
412 | bits = kp->pdata->num_cols - KEYP_CTRL_SCAN_COLS_MIN; | |
413 | ctrl_val = (bits & KEYP_CTRL_SCAN_COLS_BITS) << | |
414 | KEYP_CTRL_SCAN_COLS_SHIFT; | |
415 | ||
416 | /* Find row bits */ | |
417 | if (kp->pdata->num_rows < KEYP_CTRL_SCAN_ROWS_MIN) | |
418 | bits = 0; | |
419 | else | |
420 | bits = row_bits[kp->pdata->num_rows - KEYP_CTRL_SCAN_ROWS_MIN]; | |
421 | ||
422 | ctrl_val |= (bits << KEYP_CTRL_SCAN_ROWS_SHIFT); | |
423 | ||
424 | rc = pmic8xxx_kp_write_u8(kp, ctrl_val, KEYP_CTRL); | |
425 | if (rc < 0) { | |
426 | dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc); | |
427 | return rc; | |
428 | } | |
429 | ||
430 | bits = (kp->pdata->debounce_ms / 5) - 1; | |
431 | ||
432 | scan_val |= (bits << KEYP_SCAN_DBOUNCE_SHIFT); | |
433 | ||
434 | bits = fls(kp->pdata->scan_delay_ms) - 1; | |
435 | scan_val |= (bits << KEYP_SCAN_PAUSE_SHIFT); | |
436 | ||
437 | /* Row hold time is a multiple of 32KHz cycles. */ | |
438 | cycles = (kp->pdata->row_hold_ns * KEYP_CLOCK_FREQ) / NSEC_PER_SEC; | |
439 | ||
440 | scan_val |= (cycles << KEYP_SCAN_ROW_HOLD_SHIFT); | |
441 | ||
442 | rc = pmic8xxx_kp_write_u8(kp, scan_val, KEYP_SCAN); | |
443 | if (rc) | |
444 | dev_err(kp->dev, "Error writing KEYP_SCAN reg, rc=%d\n", rc); | |
445 | ||
446 | return rc; | |
447 | ||
448 | } | |
449 | ||
450 | static int __devinit pmic8xxx_kp_config_gpio(int gpio_start, int num_gpios, | |
451 | struct pmic8xxx_kp *kp, struct pm_gpio *gpio_config) | |
452 | { | |
453 | int rc, i; | |
454 | ||
455 | if (gpio_start < 0 || num_gpios < 0) | |
456 | return -EINVAL; | |
457 | ||
458 | for (i = 0; i < num_gpios; i++) { | |
459 | rc = pm8xxx_gpio_config(gpio_start + i, gpio_config); | |
460 | if (rc) { | |
461 | dev_err(kp->dev, "%s: FAIL pm8xxx_gpio_config():" | |
462 | "for PM GPIO [%d] rc=%d.\n", | |
463 | __func__, gpio_start + i, rc); | |
464 | return rc; | |
465 | } | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static int pmic8xxx_kp_enable(struct pmic8xxx_kp *kp) | |
472 | { | |
473 | int rc; | |
474 | ||
475 | kp->ctrl_reg |= KEYP_CTRL_KEYP_EN; | |
476 | ||
477 | rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL); | |
478 | if (rc < 0) | |
479 | dev_err(kp->dev, "Error writing KEYP_CTRL reg, rc=%d\n", rc); | |
480 | ||
481 | return rc; | |
482 | } | |
483 | ||
484 | static int pmic8xxx_kp_disable(struct pmic8xxx_kp *kp) | |
485 | { | |
486 | int rc; | |
487 | ||
488 | kp->ctrl_reg &= ~KEYP_CTRL_KEYP_EN; | |
489 | ||
490 | rc = pmic8xxx_kp_write_u8(kp, kp->ctrl_reg, KEYP_CTRL); | |
491 | if (rc < 0) | |
492 | return rc; | |
493 | ||
494 | return rc; | |
495 | } | |
496 | ||
497 | static int pmic8xxx_kp_open(struct input_dev *dev) | |
498 | { | |
499 | struct pmic8xxx_kp *kp = input_get_drvdata(dev); | |
500 | ||
501 | return pmic8xxx_kp_enable(kp); | |
502 | } | |
503 | ||
504 | static void pmic8xxx_kp_close(struct input_dev *dev) | |
505 | { | |
506 | struct pmic8xxx_kp *kp = input_get_drvdata(dev); | |
507 | ||
508 | pmic8xxx_kp_disable(kp); | |
509 | } | |
510 | ||
511 | /* | |
512 | * keypad controller should be initialized in the following sequence | |
513 | * only, otherwise it might get into FSM stuck state. | |
514 | * | |
515 | * - Initialize keypad control parameters, like no. of rows, columns, | |
516 | * timing values etc., | |
517 | * - configure rows and column gpios pull up/down. | |
518 | * - set irq edge type. | |
519 | * - enable the keypad controller. | |
520 | */ | |
521 | static int __devinit pmic8xxx_kp_probe(struct platform_device *pdev) | |
522 | { | |
1d08382a SO |
523 | const struct pm8xxx_keypad_platform_data *pdata = |
524 | dev_get_platdata(&pdev->dev); | |
39325b59 TS |
525 | const struct matrix_keymap_data *keymap_data; |
526 | struct pmic8xxx_kp *kp; | |
527 | int rc; | |
528 | u8 ctrl_val; | |
529 | ||
530 | struct pm_gpio kypd_drv = { | |
531 | .direction = PM_GPIO_DIR_OUT, | |
532 | .output_buffer = PM_GPIO_OUT_BUF_OPEN_DRAIN, | |
533 | .output_value = 0, | |
534 | .pull = PM_GPIO_PULL_NO, | |
535 | .vin_sel = PM_GPIO_VIN_S3, | |
536 | .out_strength = PM_GPIO_STRENGTH_LOW, | |
537 | .function = PM_GPIO_FUNC_1, | |
538 | .inv_int_pol = 1, | |
539 | }; | |
540 | ||
541 | struct pm_gpio kypd_sns = { | |
542 | .direction = PM_GPIO_DIR_IN, | |
543 | .pull = PM_GPIO_PULL_UP_31P5, | |
544 | .vin_sel = PM_GPIO_VIN_S3, | |
545 | .out_strength = PM_GPIO_STRENGTH_NO, | |
546 | .function = PM_GPIO_FUNC_NORMAL, | |
547 | .inv_int_pol = 1, | |
548 | }; | |
549 | ||
550 | ||
551 | if (!pdata || !pdata->num_cols || !pdata->num_rows || | |
552 | pdata->num_cols > PM8XXX_MAX_COLS || | |
553 | pdata->num_rows > PM8XXX_MAX_ROWS || | |
554 | pdata->num_cols < PM8XXX_MIN_COLS) { | |
555 | dev_err(&pdev->dev, "invalid platform data\n"); | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | if (!pdata->scan_delay_ms || | |
560 | pdata->scan_delay_ms > MAX_SCAN_DELAY || | |
561 | pdata->scan_delay_ms < MIN_SCAN_DELAY || | |
562 | !is_power_of_2(pdata->scan_delay_ms)) { | |
563 | dev_err(&pdev->dev, "invalid keypad scan time supplied\n"); | |
564 | return -EINVAL; | |
565 | } | |
566 | ||
567 | if (!pdata->row_hold_ns || | |
568 | pdata->row_hold_ns > MAX_ROW_HOLD_DELAY || | |
569 | pdata->row_hold_ns < MIN_ROW_HOLD_DELAY || | |
570 | ((pdata->row_hold_ns % MIN_ROW_HOLD_DELAY) != 0)) { | |
571 | dev_err(&pdev->dev, "invalid keypad row hold time supplied\n"); | |
572 | return -EINVAL; | |
573 | } | |
574 | ||
575 | if (!pdata->debounce_ms || | |
576 | ((pdata->debounce_ms % 5) != 0) || | |
577 | pdata->debounce_ms > MAX_DEBOUNCE_TIME || | |
578 | pdata->debounce_ms < MIN_DEBOUNCE_TIME) { | |
579 | dev_err(&pdev->dev, "invalid debounce time supplied\n"); | |
580 | return -EINVAL; | |
581 | } | |
582 | ||
583 | keymap_data = pdata->keymap_data; | |
584 | if (!keymap_data) { | |
585 | dev_err(&pdev->dev, "no keymap data supplied\n"); | |
586 | return -EINVAL; | |
587 | } | |
588 | ||
589 | kp = kzalloc(sizeof(*kp), GFP_KERNEL); | |
590 | if (!kp) | |
591 | return -ENOMEM; | |
592 | ||
593 | platform_set_drvdata(pdev, kp); | |
594 | ||
595 | kp->pdata = pdata; | |
596 | kp->dev = &pdev->dev; | |
597 | ||
598 | kp->input = input_allocate_device(); | |
599 | if (!kp->input) { | |
600 | dev_err(&pdev->dev, "unable to allocate input device\n"); | |
601 | rc = -ENOMEM; | |
602 | goto err_alloc_device; | |
603 | } | |
604 | ||
605 | kp->key_sense_irq = platform_get_irq(pdev, 0); | |
606 | if (kp->key_sense_irq < 0) { | |
607 | dev_err(&pdev->dev, "unable to get keypad sense irq\n"); | |
608 | rc = -ENXIO; | |
609 | goto err_get_irq; | |
610 | } | |
611 | ||
612 | kp->key_stuck_irq = platform_get_irq(pdev, 1); | |
613 | if (kp->key_stuck_irq < 0) { | |
614 | dev_err(&pdev->dev, "unable to get keypad stuck irq\n"); | |
615 | rc = -ENXIO; | |
616 | goto err_get_irq; | |
617 | } | |
618 | ||
619 | kp->input->name = pdata->input_name ? : "PMIC8XXX keypad"; | |
620 | kp->input->phys = pdata->input_phys_device ? : "pmic8xxx_keypad/input0"; | |
621 | ||
622 | kp->input->dev.parent = &pdev->dev; | |
623 | ||
624 | kp->input->id.bustype = BUS_I2C; | |
625 | kp->input->id.version = 0x0001; | |
626 | kp->input->id.product = 0x0001; | |
627 | kp->input->id.vendor = 0x0001; | |
628 | ||
39325b59 TS |
629 | kp->input->open = pmic8xxx_kp_open; |
630 | kp->input->close = pmic8xxx_kp_close; | |
631 | ||
1932811f DT |
632 | rc = matrix_keypad_build_keymap(keymap_data, NULL, |
633 | PM8XXX_MAX_ROWS, PM8XXX_MAX_COLS, | |
634 | kp->keycodes, kp->input); | |
635 | if (rc) { | |
636 | dev_err(&pdev->dev, "failed to build keymap\n"); | |
637 | goto err_get_irq; | |
638 | } | |
39325b59 | 639 | |
1932811f DT |
640 | if (pdata->rep) |
641 | __set_bit(EV_REP, kp->input->evbit); | |
39325b59 | 642 | input_set_capability(kp->input, EV_MSC, MSC_SCAN); |
1932811f | 643 | |
39325b59 TS |
644 | input_set_drvdata(kp->input, kp); |
645 | ||
646 | /* initialize keypad state */ | |
647 | memset(kp->keystate, 0xff, sizeof(kp->keystate)); | |
648 | memset(kp->stuckstate, 0xff, sizeof(kp->stuckstate)); | |
649 | ||
650 | rc = pmic8xxx_kpd_init(kp); | |
651 | if (rc < 0) { | |
652 | dev_err(&pdev->dev, "unable to initialize keypad controller\n"); | |
653 | goto err_get_irq; | |
654 | } | |
655 | ||
656 | rc = pmic8xxx_kp_config_gpio(pdata->cols_gpio_start, | |
657 | pdata->num_cols, kp, &kypd_sns); | |
658 | if (rc < 0) { | |
659 | dev_err(&pdev->dev, "unable to configure keypad sense lines\n"); | |
660 | goto err_gpio_config; | |
661 | } | |
662 | ||
663 | rc = pmic8xxx_kp_config_gpio(pdata->rows_gpio_start, | |
664 | pdata->num_rows, kp, &kypd_drv); | |
665 | if (rc < 0) { | |
666 | dev_err(&pdev->dev, "unable to configure keypad drive lines\n"); | |
667 | goto err_gpio_config; | |
668 | } | |
669 | ||
670 | rc = request_any_context_irq(kp->key_sense_irq, pmic8xxx_kp_irq, | |
671 | IRQF_TRIGGER_RISING, "pmic-keypad", kp); | |
672 | if (rc < 0) { | |
673 | dev_err(&pdev->dev, "failed to request keypad sense irq\n"); | |
674 | goto err_get_irq; | |
675 | } | |
676 | ||
677 | rc = request_any_context_irq(kp->key_stuck_irq, pmic8xxx_kp_stuck_irq, | |
678 | IRQF_TRIGGER_RISING, "pmic-keypad-stuck", kp); | |
679 | if (rc < 0) { | |
680 | dev_err(&pdev->dev, "failed to request keypad stuck irq\n"); | |
681 | goto err_req_stuck_irq; | |
682 | } | |
683 | ||
684 | rc = pmic8xxx_kp_read_u8(kp, &ctrl_val, KEYP_CTRL); | |
685 | if (rc < 0) { | |
686 | dev_err(&pdev->dev, "failed to read KEYP_CTRL register\n"); | |
687 | goto err_pmic_reg_read; | |
688 | } | |
689 | ||
690 | kp->ctrl_reg = ctrl_val; | |
691 | ||
692 | rc = input_register_device(kp->input); | |
693 | if (rc < 0) { | |
694 | dev_err(&pdev->dev, "unable to register keypad input device\n"); | |
695 | goto err_pmic_reg_read; | |
696 | } | |
697 | ||
698 | device_init_wakeup(&pdev->dev, pdata->wakeup); | |
699 | ||
700 | return 0; | |
701 | ||
702 | err_pmic_reg_read: | |
edf21d9c | 703 | free_irq(kp->key_stuck_irq, kp); |
39325b59 | 704 | err_req_stuck_irq: |
edf21d9c | 705 | free_irq(kp->key_sense_irq, kp); |
39325b59 TS |
706 | err_gpio_config: |
707 | err_get_irq: | |
708 | input_free_device(kp->input); | |
709 | err_alloc_device: | |
710 | platform_set_drvdata(pdev, NULL); | |
711 | kfree(kp); | |
712 | return rc; | |
713 | } | |
714 | ||
715 | static int __devexit pmic8xxx_kp_remove(struct platform_device *pdev) | |
716 | { | |
717 | struct pmic8xxx_kp *kp = platform_get_drvdata(pdev); | |
718 | ||
719 | device_init_wakeup(&pdev->dev, 0); | |
edf21d9c AL |
720 | free_irq(kp->key_stuck_irq, kp); |
721 | free_irq(kp->key_sense_irq, kp); | |
39325b59 TS |
722 | input_unregister_device(kp->input); |
723 | kfree(kp); | |
724 | ||
725 | platform_set_drvdata(pdev, NULL); | |
726 | return 0; | |
727 | } | |
728 | ||
729 | #ifdef CONFIG_PM_SLEEP | |
730 | static int pmic8xxx_kp_suspend(struct device *dev) | |
731 | { | |
732 | struct platform_device *pdev = to_platform_device(dev); | |
733 | struct pmic8xxx_kp *kp = platform_get_drvdata(pdev); | |
734 | struct input_dev *input_dev = kp->input; | |
735 | ||
736 | if (device_may_wakeup(dev)) { | |
737 | enable_irq_wake(kp->key_sense_irq); | |
738 | } else { | |
739 | mutex_lock(&input_dev->mutex); | |
740 | ||
741 | if (input_dev->users) | |
742 | pmic8xxx_kp_disable(kp); | |
743 | ||
744 | mutex_unlock(&input_dev->mutex); | |
745 | } | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | static int pmic8xxx_kp_resume(struct device *dev) | |
751 | { | |
752 | struct platform_device *pdev = to_platform_device(dev); | |
753 | struct pmic8xxx_kp *kp = platform_get_drvdata(pdev); | |
754 | struct input_dev *input_dev = kp->input; | |
755 | ||
756 | if (device_may_wakeup(dev)) { | |
757 | disable_irq_wake(kp->key_sense_irq); | |
758 | } else { | |
759 | mutex_lock(&input_dev->mutex); | |
760 | ||
761 | if (input_dev->users) | |
762 | pmic8xxx_kp_enable(kp); | |
763 | ||
764 | mutex_unlock(&input_dev->mutex); | |
765 | } | |
766 | ||
767 | return 0; | |
768 | } | |
769 | #endif | |
770 | ||
771 | static SIMPLE_DEV_PM_OPS(pm8xxx_kp_pm_ops, | |
772 | pmic8xxx_kp_suspend, pmic8xxx_kp_resume); | |
773 | ||
774 | static struct platform_driver pmic8xxx_kp_driver = { | |
775 | .probe = pmic8xxx_kp_probe, | |
776 | .remove = __devexit_p(pmic8xxx_kp_remove), | |
777 | .driver = { | |
778 | .name = PM8XXX_KEYPAD_DEV_NAME, | |
779 | .owner = THIS_MODULE, | |
780 | .pm = &pm8xxx_kp_pm_ops, | |
781 | }, | |
782 | }; | |
5146c84f | 783 | module_platform_driver(pmic8xxx_kp_driver); |
39325b59 TS |
784 | |
785 | MODULE_LICENSE("GPL v2"); | |
786 | MODULE_DESCRIPTION("PMIC8XXX keypad driver"); | |
787 | MODULE_VERSION("1.0"); | |
788 | MODULE_ALIAS("platform:pmic8xxx_keypad"); | |
789 | MODULE_AUTHOR("Trilok Soni <tsoni@codeaurora.org>"); |