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19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/interrupt.h>
23#include <linux/input.h>
24#include <linux/device.h>
25#include <linux/platform_device.h>
26#include <linux/clk.h>
27#include <linux/err.h>
28#include <linux/input/matrix_keypad.h>
29#include <linux/slab.h>
30
31#include <asm/mach/arch.h>
32#include <asm/mach/map.h>
33
34#include <mach/hardware.h>
35#include <plat/pxa27x_keypad.h>
36
37
38
39#define KPC 0x0000
40#define KPDK 0x0008
41#define KPREC 0x0010
42#define KPMK 0x0018
43#define KPAS 0x0020
44
45
46#define KPASMKP0 0x0028
47#define KPASMKP1 0x0030
48#define KPASMKP2 0x0038
49#define KPASMKP3 0x0040
50#define KPKDI 0x0048
51
52
53#define KPC_MKRN(n) ((((n) - 1) & 0x7) << 26)
54#define KPC_MKCN(n) ((((n) - 1) & 0x7) << 23)
55#define KPC_DKN(n) ((((n) - 1) & 0x7) << 6)
56
57#define KPC_AS (0x1 << 30)
58#define KPC_ASACT (0x1 << 29)
59#define KPC_MI (0x1 << 22)
60#define KPC_IMKP (0x1 << 21)
61
62#define KPC_MS(n) (0x1 << (13 + (n)))
63#define KPC_MS_ALL (0xff << 13)
64
65#define KPC_ME (0x1 << 12)
66#define KPC_MIE (0x1 << 11)
67#define KPC_DK_DEB_SEL (0x1 << 9)
68#define KPC_DI (0x1 << 5)
69#define KPC_RE_ZERO_DEB (0x1 << 4)
70#define KPC_REE1 (0x1 << 3)
71#define KPC_REE0 (0x1 << 2)
72#define KPC_DE (0x1 << 1)
73#define KPC_DIE (0x1 << 0)
74
75#define KPDK_DKP (0x1 << 31)
76#define KPDK_DK(n) ((n) & 0xff)
77
78#define KPREC_OF1 (0x1 << 31)
79#define kPREC_UF1 (0x1 << 30)
80#define KPREC_OF0 (0x1 << 15)
81#define KPREC_UF0 (0x1 << 14)
82
83#define KPREC_RECOUNT0(n) ((n) & 0xff)
84#define KPREC_RECOUNT1(n) (((n) >> 16) & 0xff)
85
86#define KPMK_MKP (0x1 << 31)
87#define KPAS_SO (0x1 << 31)
88#define KPASMKPx_SO (0x1 << 31)
89
90#define KPAS_MUKP(n) (((n) >> 26) & 0x1f)
91#define KPAS_RP(n) (((n) >> 4) & 0xf)
92#define KPAS_CP(n) ((n) & 0xf)
93
94#define KPASMKP_MKC_MASK (0xff)
95
96#define keypad_readl(off) __raw_readl(keypad->mmio_base + (off))
97#define keypad_writel(off, v) __raw_writel((v), keypad->mmio_base + (off))
98
99#define MAX_MATRIX_KEY_NUM (MAX_MATRIX_KEY_ROWS * MAX_MATRIX_KEY_COLS)
100#define MAX_KEYPAD_KEYS (MAX_MATRIX_KEY_NUM + MAX_DIRECT_KEY_NUM)
101
102struct pxa27x_keypad {
103 struct pxa27x_keypad_platform_data *pdata;
104
105 struct clk *clk;
106 struct input_dev *input_dev;
107 void __iomem *mmio_base;
108
109 int irq;
110
111 unsigned short keycodes[MAX_KEYPAD_KEYS];
112 int rotary_rel_code[2];
113
114
115 uint32_t matrix_key_state[MAX_MATRIX_KEY_COLS];
116 uint32_t direct_key_state;
117
118 unsigned int direct_key_mask;
119};
120
121static void pxa27x_keypad_build_keycode(struct pxa27x_keypad *keypad)
122{
123 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
124 struct input_dev *input_dev = keypad->input_dev;
125 unsigned short keycode;
126 int i;
127
128 for (i = 0; i < pdata->matrix_key_map_size; i++) {
129 unsigned int key = pdata->matrix_key_map[i];
130 unsigned int row = KEY_ROW(key);
131 unsigned int col = KEY_COL(key);
132 unsigned int scancode = MATRIX_SCAN_CODE(row, col,
133 MATRIX_ROW_SHIFT);
134
135 keycode = KEY_VAL(key);
136 keypad->keycodes[scancode] = keycode;
137 __set_bit(keycode, input_dev->keybit);
138 }
139
140 for (i = 0; i < pdata->direct_key_num; i++) {
141 keycode = pdata->direct_key_map[i];
142 keypad->keycodes[MAX_MATRIX_KEY_NUM + i] = keycode;
143 __set_bit(keycode, input_dev->keybit);
144 }
145
146 if (pdata->enable_rotary0) {
147 if (pdata->rotary0_up_key && pdata->rotary0_down_key) {
148 keycode = pdata->rotary0_up_key;
149 keypad->keycodes[MAX_MATRIX_KEY_NUM + 0] = keycode;
150 __set_bit(keycode, input_dev->keybit);
151
152 keycode = pdata->rotary0_down_key;
153 keypad->keycodes[MAX_MATRIX_KEY_NUM + 1] = keycode;
154 __set_bit(keycode, input_dev->keybit);
155
156 keypad->rotary_rel_code[0] = -1;
157 } else {
158 keypad->rotary_rel_code[0] = pdata->rotary0_rel_code;
159 __set_bit(pdata->rotary0_rel_code, input_dev->relbit);
160 }
161 }
162
163 if (pdata->enable_rotary1) {
164 if (pdata->rotary1_up_key && pdata->rotary1_down_key) {
165 keycode = pdata->rotary1_up_key;
166 keypad->keycodes[MAX_MATRIX_KEY_NUM + 2] = keycode;
167 __set_bit(keycode, input_dev->keybit);
168
169 keycode = pdata->rotary1_down_key;
170 keypad->keycodes[MAX_MATRIX_KEY_NUM + 3] = keycode;
171 __set_bit(keycode, input_dev->keybit);
172
173 keypad->rotary_rel_code[1] = -1;
174 } else {
175 keypad->rotary_rel_code[1] = pdata->rotary1_rel_code;
176 __set_bit(pdata->rotary1_rel_code, input_dev->relbit);
177 }
178 }
179
180 __clear_bit(KEY_RESERVED, input_dev->keybit);
181}
182
183static void pxa27x_keypad_scan_matrix(struct pxa27x_keypad *keypad)
184{
185 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
186 struct input_dev *input_dev = keypad->input_dev;
187 int row, col, num_keys_pressed = 0;
188 uint32_t new_state[MAX_MATRIX_KEY_COLS];
189 uint32_t kpas = keypad_readl(KPAS);
190
191 num_keys_pressed = KPAS_MUKP(kpas);
192
193 memset(new_state, 0, sizeof(new_state));
194
195 if (num_keys_pressed == 0)
196 goto scan;
197
198 if (num_keys_pressed == 1) {
199 col = KPAS_CP(kpas);
200 row = KPAS_RP(kpas);
201
202
203 if (col >= pdata->matrix_key_cols ||
204 row >= pdata->matrix_key_rows)
205 goto scan;
206
207 new_state[col] = (1 << row);
208 goto scan;
209 }
210
211 if (num_keys_pressed > 1) {
212 uint32_t kpasmkp0 = keypad_readl(KPASMKP0);
213 uint32_t kpasmkp1 = keypad_readl(KPASMKP1);
214 uint32_t kpasmkp2 = keypad_readl(KPASMKP2);
215 uint32_t kpasmkp3 = keypad_readl(KPASMKP3);
216
217 new_state[0] = kpasmkp0 & KPASMKP_MKC_MASK;
218 new_state[1] = (kpasmkp0 >> 16) & KPASMKP_MKC_MASK;
219 new_state[2] = kpasmkp1 & KPASMKP_MKC_MASK;
220 new_state[3] = (kpasmkp1 >> 16) & KPASMKP_MKC_MASK;
221 new_state[4] = kpasmkp2 & KPASMKP_MKC_MASK;
222 new_state[5] = (kpasmkp2 >> 16) & KPASMKP_MKC_MASK;
223 new_state[6] = kpasmkp3 & KPASMKP_MKC_MASK;
224 new_state[7] = (kpasmkp3 >> 16) & KPASMKP_MKC_MASK;
225 }
226scan:
227 for (col = 0; col < pdata->matrix_key_cols; col++) {
228 uint32_t bits_changed;
229 int code;
230
231 bits_changed = keypad->matrix_key_state[col] ^ new_state[col];
232 if (bits_changed == 0)
233 continue;
234
235 for (row = 0; row < pdata->matrix_key_rows; row++) {
236 if ((bits_changed & (1 << row)) == 0)
237 continue;
238
239 code = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
240 input_event(input_dev, EV_MSC, MSC_SCAN, code);
241 input_report_key(input_dev, keypad->keycodes[code],
242 new_state[col] & (1 << row));
243 }
244 }
245 input_sync(input_dev);
246 memcpy(keypad->matrix_key_state, new_state, sizeof(new_state));
247}
248
249#define DEFAULT_KPREC (0x007f007f)
250
251static inline int rotary_delta(uint32_t kprec)
252{
253 if (kprec & KPREC_OF0)
254 return (kprec & 0xff) + 0x7f;
255 else if (kprec & KPREC_UF0)
256 return (kprec & 0xff) - 0x7f - 0xff;
257 else
258 return (kprec & 0xff) - 0x7f;
259}
260
261static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
262{
263 struct input_dev *dev = keypad->input_dev;
264
265 if (delta == 0)
266 return;
267
268 if (keypad->rotary_rel_code[r] == -1) {
269 int code = MAX_MATRIX_KEY_NUM + 2 * r + (delta > 0 ? 0 : 1);
270 unsigned char keycode = keypad->keycodes[code];
271
272
273 input_event(dev, EV_MSC, MSC_SCAN, code);
274 input_report_key(dev, keycode, 1);
275 input_sync(dev);
276 input_event(dev, EV_MSC, MSC_SCAN, code);
277 input_report_key(dev, keycode, 0);
278 input_sync(dev);
279 } else {
280 input_report_rel(dev, keypad->rotary_rel_code[r], delta);
281 input_sync(dev);
282 }
283}
284
285static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
286{
287 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
288 uint32_t kprec;
289
290
291 kprec = keypad_readl(KPREC);
292 keypad_writel(KPREC, DEFAULT_KPREC);
293
294 if (pdata->enable_rotary0)
295 report_rotary_event(keypad, 0, rotary_delta(kprec));
296
297 if (pdata->enable_rotary1)
298 report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
299}
300
301static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
302{
303 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
304 struct input_dev *input_dev = keypad->input_dev;
305 unsigned int new_state;
306 uint32_t kpdk, bits_changed;
307 int i;
308
309 kpdk = keypad_readl(KPDK);
310
311 if (pdata->enable_rotary0 || pdata->enable_rotary1)
312 pxa27x_keypad_scan_rotary(keypad);
313
314 new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
315 bits_changed = keypad->direct_key_state ^ new_state;
316
317 if (bits_changed == 0)
318 return;
319
320 for (i = 0; i < pdata->direct_key_num; i++) {
321 if (bits_changed & (1 << i)) {
322 int code = MAX_MATRIX_KEY_NUM + i;
323
324 input_event(input_dev, EV_MSC, MSC_SCAN, code);
325 input_report_key(input_dev, keypad->keycodes[code],
326 new_state & (1 << i));
327 }
328 }
329 input_sync(input_dev);
330 keypad->direct_key_state = new_state;
331}
332
333static void clear_wakeup_event(struct pxa27x_keypad *keypad)
334{
335 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
336
337 if (pdata->clear_wakeup_event)
338 (pdata->clear_wakeup_event)();
339}
340
341static irqreturn_t pxa27x_keypad_irq_handler(int irq, void *dev_id)
342{
343 struct pxa27x_keypad *keypad = dev_id;
344 unsigned long kpc = keypad_readl(KPC);
345
346 clear_wakeup_event(keypad);
347
348 if (kpc & KPC_DI)
349 pxa27x_keypad_scan_direct(keypad);
350
351 if (kpc & KPC_MI)
352 pxa27x_keypad_scan_matrix(keypad);
353
354 return IRQ_HANDLED;
355}
356
357static void pxa27x_keypad_config(struct pxa27x_keypad *keypad)
358{
359 struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
360 unsigned int mask = 0, direct_key_num = 0;
361 unsigned long kpc = 0;
362
363
364 if (pdata->matrix_key_rows && pdata->matrix_key_cols) {
365 kpc |= KPC_ASACT | KPC_MIE | KPC_ME | KPC_MS_ALL;
366 kpc |= KPC_MKRN(pdata->matrix_key_rows) |
367 KPC_MKCN(pdata->matrix_key_cols);
368 }
369
370
371 if (pdata->enable_rotary0) {
372 mask |= 0x03;
373 direct_key_num = 2;
374 kpc |= KPC_REE0;
375 }
376
377 if (pdata->enable_rotary1) {
378 mask |= 0x0c;
379 direct_key_num = 4;
380 kpc |= KPC_REE1;
381 }
382
383 if (pdata->direct_key_num > direct_key_num)
384 direct_key_num = pdata->direct_key_num;
385
386 keypad->direct_key_mask = ((2 << direct_key_num) - 1) & ~mask;
387
388
389 if (direct_key_num)
390 kpc |= KPC_DE | KPC_DIE | KPC_DKN(direct_key_num);
391
392 keypad_writel(KPC, kpc | KPC_RE_ZERO_DEB);
393 keypad_writel(KPREC, DEFAULT_KPREC);
394 keypad_writel(KPKDI, pdata->debounce_interval);
395}
396
397static int pxa27x_keypad_open(struct input_dev *dev)
398{
399 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
400
401
402 clk_enable(keypad->clk);
403 pxa27x_keypad_config(keypad);
404
405 return 0;
406}
407
408static void pxa27x_keypad_close(struct input_dev *dev)
409{
410 struct pxa27x_keypad *keypad = input_get_drvdata(dev);
411
412
413 clk_disable(keypad->clk);
414}
415
416#ifdef CONFIG_PM
417static int pxa27x_keypad_suspend(struct device *dev)
418{
419 struct platform_device *pdev = to_platform_device(dev);
420 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
421
422 clk_disable(keypad->clk);
423
424 if (device_may_wakeup(&pdev->dev))
425 enable_irq_wake(keypad->irq);
426
427 return 0;
428}
429
430static int pxa27x_keypad_resume(struct device *dev)
431{
432 struct platform_device *pdev = to_platform_device(dev);
433 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
434 struct input_dev *input_dev = keypad->input_dev;
435
436 if (device_may_wakeup(&pdev->dev))
437 disable_irq_wake(keypad->irq);
438
439 mutex_lock(&input_dev->mutex);
440
441 if (input_dev->users) {
442
443 clk_enable(keypad->clk);
444 pxa27x_keypad_config(keypad);
445 }
446
447 mutex_unlock(&input_dev->mutex);
448
449 return 0;
450}
451
452static const struct dev_pm_ops pxa27x_keypad_pm_ops = {
453 .suspend = pxa27x_keypad_suspend,
454 .resume = pxa27x_keypad_resume,
455};
456#endif
457
458static int __devinit pxa27x_keypad_probe(struct platform_device *pdev)
459{
460 struct pxa27x_keypad_platform_data *pdata = pdev->dev.platform_data;
461 struct pxa27x_keypad *keypad;
462 struct input_dev *input_dev;
463 struct resource *res;
464 int irq, error;
465
466 if (pdata == NULL) {
467 dev_err(&pdev->dev, "no platform data defined\n");
468 return -EINVAL;
469 }
470
471 irq = platform_get_irq(pdev, 0);
472 if (irq < 0) {
473 dev_err(&pdev->dev, "failed to get keypad irq\n");
474 return -ENXIO;
475 }
476
477 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
478 if (res == NULL) {
479 dev_err(&pdev->dev, "failed to get I/O memory\n");
480 return -ENXIO;
481 }
482
483 keypad = kzalloc(sizeof(struct pxa27x_keypad), GFP_KERNEL);
484 input_dev = input_allocate_device();
485 if (!keypad || !input_dev) {
486 dev_err(&pdev->dev, "failed to allocate memory\n");
487 error = -ENOMEM;
488 goto failed_free;
489 }
490
491 keypad->pdata = pdata;
492 keypad->input_dev = input_dev;
493 keypad->irq = irq;
494
495 res = request_mem_region(res->start, resource_size(res), pdev->name);
496 if (res == NULL) {
497 dev_err(&pdev->dev, "failed to request I/O memory\n");
498 error = -EBUSY;
499 goto failed_free;
500 }
501
502 keypad->mmio_base = ioremap(res->start, resource_size(res));
503 if (keypad->mmio_base == NULL) {
504 dev_err(&pdev->dev, "failed to remap I/O memory\n");
505 error = -ENXIO;
506 goto failed_free_mem;
507 }
508
509 keypad->clk = clk_get(&pdev->dev, NULL);
510 if (IS_ERR(keypad->clk)) {
511 dev_err(&pdev->dev, "failed to get keypad clock\n");
512 error = PTR_ERR(keypad->clk);
513 goto failed_free_io;
514 }
515
516 input_dev->name = pdev->name;
517 input_dev->id.bustype = BUS_HOST;
518 input_dev->open = pxa27x_keypad_open;
519 input_dev->close = pxa27x_keypad_close;
520 input_dev->dev.parent = &pdev->dev;
521
522 input_dev->keycode = keypad->keycodes;
523 input_dev->keycodesize = sizeof(keypad->keycodes[0]);
524 input_dev->keycodemax = ARRAY_SIZE(keypad->keycodes);
525
526 input_set_drvdata(input_dev, keypad);
527
528 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
529 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
530
531 pxa27x_keypad_build_keycode(keypad);
532
533 if ((pdata->enable_rotary0 && keypad->rotary_rel_code[0] != -1) ||
534 (pdata->enable_rotary1 && keypad->rotary_rel_code[1] != -1)) {
535 input_dev->evbit[0] |= BIT_MASK(EV_REL);
536 }
537
538 error = request_irq(irq, pxa27x_keypad_irq_handler, 0,
539 pdev->name, keypad);
540 if (error) {
541 dev_err(&pdev->dev, "failed to request IRQ\n");
542 goto failed_put_clk;
543 }
544
545
546 error = input_register_device(input_dev);
547 if (error) {
548 dev_err(&pdev->dev, "failed to register input device\n");
549 goto failed_free_irq;
550 }
551
552 platform_set_drvdata(pdev, keypad);
553 device_init_wakeup(&pdev->dev, 1);
554
555 return 0;
556
557failed_free_irq:
558 free_irq(irq, pdev);
559failed_put_clk:
560 clk_put(keypad->clk);
561failed_free_io:
562 iounmap(keypad->mmio_base);
563failed_free_mem:
564 release_mem_region(res->start, resource_size(res));
565failed_free:
566 input_free_device(input_dev);
567 kfree(keypad);
568 return error;
569}
570
571static int __devexit pxa27x_keypad_remove(struct platform_device *pdev)
572{
573 struct pxa27x_keypad *keypad = platform_get_drvdata(pdev);
574 struct resource *res;
575
576 free_irq(keypad->irq, pdev);
577 clk_put(keypad->clk);
578
579 input_unregister_device(keypad->input_dev);
580 iounmap(keypad->mmio_base);
581
582 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
583 release_mem_region(res->start, resource_size(res));
584
585 platform_set_drvdata(pdev, NULL);
586 kfree(keypad);
587
588 return 0;
589}
590
591
592MODULE_ALIAS("platform:pxa27x-keypad");
593
594static struct platform_driver pxa27x_keypad_driver = {
595 .probe = pxa27x_keypad_probe,
596 .remove = __devexit_p(pxa27x_keypad_remove),
597 .driver = {
598 .name = "pxa27x-keypad",
599 .owner = THIS_MODULE,
600#ifdef CONFIG_PM
601 .pm = &pxa27x_keypad_pm_ops,
602#endif
603 },
604};
605
606static int __init pxa27x_keypad_init(void)
607{
608 return platform_driver_register(&pxa27x_keypad_driver);
609}
610
611static void __exit pxa27x_keypad_exit(void)
612{
613 platform_driver_unregister(&pxa27x_keypad_driver);
614}
615
616module_init(pxa27x_keypad_init);
617module_exit(pxa27x_keypad_exit);
618
619MODULE_DESCRIPTION("PXA27x Keypad Controller Driver");
620MODULE_LICENSE("GPL");
621
