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1/*
2 * OMAP4 Keypad Driver
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * Author: Abraham Arce <x0066660@ti.com>
7 * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#include <linux/module.h>
25#include <linux/interrupt.h>
26#include <linux/platform_device.h>
27#include <linux/errno.h>
28#include <linux/io.h>
29#include <linux/of.h>
30#include <linux/input.h>
31#include <linux/input/matrix_keypad.h>
32#include <linux/slab.h>
33#include <linux/pm_runtime.h>
34
35/* OMAP4 registers */
36#define OMAP4_KBD_REVISION 0x00
37#define OMAP4_KBD_SYSCONFIG 0x10
38#define OMAP4_KBD_SYSSTATUS 0x14
39#define OMAP4_KBD_IRQSTATUS 0x18
40#define OMAP4_KBD_IRQENABLE 0x1C
41#define OMAP4_KBD_WAKEUPENABLE 0x20
42#define OMAP4_KBD_PENDING 0x24
43#define OMAP4_KBD_CTRL 0x28
44#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
45#define OMAP4_KBD_LONGKEYTIME 0x30
46#define OMAP4_KBD_TIMEOUT 0x34
47#define OMAP4_KBD_STATEMACHINE 0x38
48#define OMAP4_KBD_ROWINPUTS 0x3C
49#define OMAP4_KBD_COLUMNOUTPUTS 0x40
50#define OMAP4_KBD_FULLCODE31_0 0x44
51#define OMAP4_KBD_FULLCODE63_32 0x48
52
53/* OMAP4 bit definitions */
54#define OMAP4_DEF_IRQENABLE_EVENTEN BIT(0)
55#define OMAP4_DEF_IRQENABLE_LONGKEY BIT(1)
56#define OMAP4_DEF_WUP_EVENT_ENA BIT(0)
57#define OMAP4_DEF_WUP_LONG_KEY_ENA BIT(1)
58#define OMAP4_DEF_CTRL_NOSOFTMODE BIT(1)
59#define OMAP4_DEF_CTRL_PTV_SHIFT 2
60
61/* OMAP4 values */
62#define OMAP4_VAL_IRQDISABLE 0x0
63#define OMAP4_VAL_DEBOUNCINGTIME 0x7
64#define OMAP4_VAL_PVT 0x7
65
66enum {
67 KBD_REVISION_OMAP4 = 0,
68 KBD_REVISION_OMAP5,
69};
70
71struct omap4_keypad {
72 struct input_dev *input;
73
74 void __iomem *base;
75 bool irq_wake_enabled;
76 unsigned int irq;
77
78 unsigned int rows;
79 unsigned int cols;
80 u32 reg_offset;
81 u32 irqreg_offset;
82 unsigned int row_shift;
83 bool no_autorepeat;
84 unsigned char key_state[8];
85 unsigned short *keymap;
86};
87
88static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
89{
90 return __raw_readl(keypad_data->base +
91 keypad_data->reg_offset + offset);
92}
93
94static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
95{
96 __raw_writel(value,
97 keypad_data->base + keypad_data->reg_offset + offset);
98}
99
100static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
101{
102 return __raw_readl(keypad_data->base +
103 keypad_data->irqreg_offset + offset);
104}
105
106static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
107 u32 offset, u32 value)
108{
109 __raw_writel(value,
110 keypad_data->base + keypad_data->irqreg_offset + offset);
111}
112
113
114/* Interrupt handlers */
115static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
116{
117 struct omap4_keypad *keypad_data = dev_id;
118
119 if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) {
120 /* Disable interrupts */
121 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
122 OMAP4_VAL_IRQDISABLE);
123 return IRQ_WAKE_THREAD;
124 }
125
126 return IRQ_NONE;
127}
128
129static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
130{
131 struct omap4_keypad *keypad_data = dev_id;
132 struct input_dev *input_dev = keypad_data->input;
133 unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
134 unsigned int col, row, code, changed;
135 u32 *new_state = (u32 *) key_state;
136
137 *new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
138 *(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
139
140 for (row = 0; row < keypad_data->rows; row++) {
141 changed = key_state[row] ^ keypad_data->key_state[row];
142 if (!changed)
143 continue;
144
145 for (col = 0; col < keypad_data->cols; col++) {
146 if (changed & (1 << col)) {
147 code = MATRIX_SCAN_CODE(row, col,
148 keypad_data->row_shift);
149 input_event(input_dev, EV_MSC, MSC_SCAN, code);
150 input_report_key(input_dev,
151 keypad_data->keymap[code],
152 key_state[row] & (1 << col));
153 }
154 }
155 }
156
157 input_sync(input_dev);
158
159 memcpy(keypad_data->key_state, key_state,
160 sizeof(keypad_data->key_state));
161
162 /* clear pending interrupts */
163 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
164 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
165
166 /* enable interrupts */
167 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
168 OMAP4_DEF_IRQENABLE_EVENTEN |
169 OMAP4_DEF_IRQENABLE_LONGKEY);
170
171 return IRQ_HANDLED;
172}
173
174static int omap4_keypad_open(struct input_dev *input)
175{
176 struct omap4_keypad *keypad_data = input_get_drvdata(input);
177
178 pm_runtime_get_sync(input->dev.parent);
179
180 disable_irq(keypad_data->irq);
181
182 kbd_writel(keypad_data, OMAP4_KBD_CTRL,
183 OMAP4_DEF_CTRL_NOSOFTMODE |
184 (OMAP4_VAL_PVT << OMAP4_DEF_CTRL_PTV_SHIFT));
185 kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
186 OMAP4_VAL_DEBOUNCINGTIME);
187 /* clear pending interrupts */
188 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
189 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
190 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
191 OMAP4_DEF_IRQENABLE_EVENTEN |
192 OMAP4_DEF_IRQENABLE_LONGKEY);
193 kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
194 OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);
195
196 enable_irq(keypad_data->irq);
197
198 return 0;
199}
200
201static void omap4_keypad_close(struct input_dev *input)
202{
203 struct omap4_keypad *keypad_data = input_get_drvdata(input);
204
205 disable_irq(keypad_data->irq);
206
207 /* Disable interrupts */
208 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
209 OMAP4_VAL_IRQDISABLE);
210
211 /* clear pending interrupts */
212 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
213 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
214
215 enable_irq(keypad_data->irq);
216
217 pm_runtime_put_sync(input->dev.parent);
218}
219
220static int omap4_keypad_parse_dt(struct device *dev,
221 struct omap4_keypad *keypad_data)
222{
223 struct device_node *np = dev->of_node;
224 int err;
225
226 err = matrix_keypad_parse_of_params(dev, &keypad_data->rows,
227 &keypad_data->cols);
228 if (err)
229 return err;
230
231 if (of_get_property(np, "linux,input-no-autorepeat", NULL))
232 keypad_data->no_autorepeat = true;
233
234 return 0;
235}
236
237static int omap4_keypad_probe(struct platform_device *pdev)
238{
239 struct omap4_keypad *keypad_data;
240 struct input_dev *input_dev;
241 struct resource *res;
242 unsigned int max_keys;
243 int rev;
244 int irq;
245 int error;
246
247 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
248 if (!res) {
249 dev_err(&pdev->dev, "no base address specified\n");
250 return -EINVAL;
251 }
252
253 irq = platform_get_irq(pdev, 0);
254 if (!irq) {
255 dev_err(&pdev->dev, "no keyboard irq assigned\n");
256 return -EINVAL;
257 }
258
259 keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
260 if (!keypad_data) {
261 dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
262 return -ENOMEM;
263 }
264
265 keypad_data->irq = irq;
266
267 error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
268 if (error)
269 goto err_free_keypad;
270
271 res = request_mem_region(res->start, resource_size(res), pdev->name);
272 if (!res) {
273 dev_err(&pdev->dev, "can't request mem region\n");
274 error = -EBUSY;
275 goto err_free_keypad;
276 }
277
278 keypad_data->base = ioremap(res->start, resource_size(res));
279 if (!keypad_data->base) {
280 dev_err(&pdev->dev, "can't ioremap mem resource\n");
281 error = -ENOMEM;
282 goto err_release_mem;
283 }
284
285
286 /*
287 * Enable clocks for the keypad module so that we can read
288 * revision register.
289 */
290 pm_runtime_enable(&pdev->dev);
291 error = pm_runtime_get_sync(&pdev->dev);
292 if (error) {
293 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
294 goto err_unmap;
295 }
296 rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
297 rev &= 0x03 << 30;
298 rev >>= 30;
299 switch (rev) {
300 case KBD_REVISION_OMAP4:
301 keypad_data->reg_offset = 0x00;
302 keypad_data->irqreg_offset = 0x00;
303 break;
304 case KBD_REVISION_OMAP5:
305 keypad_data->reg_offset = 0x10;
306 keypad_data->irqreg_offset = 0x0c;
307 break;
308 default:
309 dev_err(&pdev->dev,
310 "Keypad reports unsupported revision %d", rev);
311 error = -EINVAL;
312 goto err_pm_put_sync;
313 }
314
315 /* input device allocation */
316 keypad_data->input = input_dev = input_allocate_device();
317 if (!input_dev) {
318 error = -ENOMEM;
319 goto err_pm_put_sync;
320 }
321
322 input_dev->name = pdev->name;
323 input_dev->dev.parent = &pdev->dev;
324 input_dev->id.bustype = BUS_HOST;
325 input_dev->id.vendor = 0x0001;
326 input_dev->id.product = 0x0001;
327 input_dev->id.version = 0x0001;
328
329 input_dev->open = omap4_keypad_open;
330 input_dev->close = omap4_keypad_close;
331
332 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
333 if (!keypad_data->no_autorepeat)
334 __set_bit(EV_REP, input_dev->evbit);
335
336 input_set_drvdata(input_dev, keypad_data);
337
338 keypad_data->row_shift = get_count_order(keypad_data->cols);
339 max_keys = keypad_data->rows << keypad_data->row_shift;
340 keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
341 GFP_KERNEL);
342 if (!keypad_data->keymap) {
343 dev_err(&pdev->dev, "Not enough memory for keymap\n");
344 error = -ENOMEM;
345 goto err_free_input;
346 }
347
348 error = matrix_keypad_build_keymap(NULL, NULL,
349 keypad_data->rows, keypad_data->cols,
350 keypad_data->keymap, input_dev);
351 if (error) {
352 dev_err(&pdev->dev, "failed to build keymap\n");
353 goto err_free_keymap;
354 }
355
356 error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
357 omap4_keypad_irq_thread_fn, 0,
358 "omap4-keypad", keypad_data);
359 if (error) {
360 dev_err(&pdev->dev, "failed to register interrupt\n");
361 goto err_free_input;
362 }
363
364 device_init_wakeup(&pdev->dev, true);
365 pm_runtime_put_sync(&pdev->dev);
366
367 error = input_register_device(keypad_data->input);
368 if (error < 0) {
369 dev_err(&pdev->dev, "failed to register input device\n");
370 goto err_pm_disable;
371 }
372
373 platform_set_drvdata(pdev, keypad_data);
374 return 0;
375
376err_pm_disable:
377 pm_runtime_disable(&pdev->dev);
378 device_init_wakeup(&pdev->dev, false);
379 free_irq(keypad_data->irq, keypad_data);
380err_free_keymap:
381 kfree(keypad_data->keymap);
382err_free_input:
383 input_free_device(input_dev);
384err_pm_put_sync:
385 pm_runtime_put_sync(&pdev->dev);
386err_unmap:
387 iounmap(keypad_data->base);
388err_release_mem:
389 release_mem_region(res->start, resource_size(res));
390err_free_keypad:
391 kfree(keypad_data);
392 return error;
393}
394
395static int omap4_keypad_remove(struct platform_device *pdev)
396{
397 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
398 struct resource *res;
399
400 free_irq(keypad_data->irq, keypad_data);
401
402 pm_runtime_disable(&pdev->dev);
403
404 device_init_wakeup(&pdev->dev, false);
405
406 input_unregister_device(keypad_data->input);
407
408 iounmap(keypad_data->base);
409
410 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
411 release_mem_region(res->start, resource_size(res));
412
413 kfree(keypad_data->keymap);
414 kfree(keypad_data);
415
416 return 0;
417}
418
419static const struct of_device_id omap_keypad_dt_match[] = {
420 { .compatible = "ti,omap4-keypad" },
421 {},
422};
423MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
424
425#ifdef CONFIG_PM_SLEEP
426static int omap4_keypad_suspend(struct device *dev)
427{
428 struct platform_device *pdev = to_platform_device(dev);
429 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
430 int error;
431
432 if (device_may_wakeup(&pdev->dev)) {
433 error = enable_irq_wake(keypad_data->irq);
434 if (!error)
435 keypad_data->irq_wake_enabled = true;
436 }
437
438 return 0;
439}
440
441static int omap4_keypad_resume(struct device *dev)
442{
443 struct platform_device *pdev = to_platform_device(dev);
444 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
445
446 if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
447 disable_irq_wake(keypad_data->irq);
448 keypad_data->irq_wake_enabled = false;
449 }
450
451 return 0;
452}
453#endif
454
455static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
456 omap4_keypad_suspend, omap4_keypad_resume);
457
458static struct platform_driver omap4_keypad_driver = {
459 .probe = omap4_keypad_probe,
460 .remove = omap4_keypad_remove,
461 .driver = {
462 .name = "omap4-keypad",
463 .pm = &omap4_keypad_pm_ops,
464 .of_match_table = omap_keypad_dt_match,
465 },
466};
467module_platform_driver(omap4_keypad_driver);
468
469MODULE_AUTHOR("Texas Instruments");
470MODULE_DESCRIPTION("OMAP4 Keypad Driver");
471MODULE_LICENSE("GPL");
472MODULE_ALIAS("platform:omap4-keypad");
1/*
2 * OMAP4 Keypad Driver
3 *
4 * Copyright (C) 2010 Texas Instruments
5 *
6 * Author: Abraham Arce <x0066660@ti.com>
7 * Initial Code: Syed Rafiuddin <rafiuddin.syed@ti.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24#include <linux/module.h>
25#include <linux/interrupt.h>
26#include <linux/platform_device.h>
27#include <linux/errno.h>
28#include <linux/io.h>
29#include <linux/of.h>
30#include <linux/input.h>
31#include <linux/slab.h>
32#include <linux/pm_runtime.h>
33
34#include <linux/platform_data/omap4-keypad.h>
35
36/* OMAP4 registers */
37#define OMAP4_KBD_REVISION 0x00
38#define OMAP4_KBD_SYSCONFIG 0x10
39#define OMAP4_KBD_SYSSTATUS 0x14
40#define OMAP4_KBD_IRQSTATUS 0x18
41#define OMAP4_KBD_IRQENABLE 0x1C
42#define OMAP4_KBD_WAKEUPENABLE 0x20
43#define OMAP4_KBD_PENDING 0x24
44#define OMAP4_KBD_CTRL 0x28
45#define OMAP4_KBD_DEBOUNCINGTIME 0x2C
46#define OMAP4_KBD_LONGKEYTIME 0x30
47#define OMAP4_KBD_TIMEOUT 0x34
48#define OMAP4_KBD_STATEMACHINE 0x38
49#define OMAP4_KBD_ROWINPUTS 0x3C
50#define OMAP4_KBD_COLUMNOUTPUTS 0x40
51#define OMAP4_KBD_FULLCODE31_0 0x44
52#define OMAP4_KBD_FULLCODE63_32 0x48
53
54/* OMAP4 bit definitions */
55#define OMAP4_DEF_IRQENABLE_EVENTEN BIT(0)
56#define OMAP4_DEF_IRQENABLE_LONGKEY BIT(1)
57#define OMAP4_DEF_WUP_EVENT_ENA BIT(0)
58#define OMAP4_DEF_WUP_LONG_KEY_ENA BIT(1)
59#define OMAP4_DEF_CTRL_NOSOFTMODE BIT(1)
60#define OMAP4_DEF_CTRL_PTV_SHIFT 2
61
62/* OMAP4 values */
63#define OMAP4_VAL_IRQDISABLE 0x0
64#define OMAP4_VAL_DEBOUNCINGTIME 0x7
65#define OMAP4_VAL_PVT 0x7
66
67enum {
68 KBD_REVISION_OMAP4 = 0,
69 KBD_REVISION_OMAP5,
70};
71
72struct omap4_keypad {
73 struct input_dev *input;
74
75 void __iomem *base;
76 bool irq_wake_enabled;
77 unsigned int irq;
78
79 unsigned int rows;
80 unsigned int cols;
81 u32 reg_offset;
82 u32 irqreg_offset;
83 unsigned int row_shift;
84 bool no_autorepeat;
85 unsigned char key_state[8];
86 unsigned short *keymap;
87};
88
89static int kbd_readl(struct omap4_keypad *keypad_data, u32 offset)
90{
91 return __raw_readl(keypad_data->base +
92 keypad_data->reg_offset + offset);
93}
94
95static void kbd_writel(struct omap4_keypad *keypad_data, u32 offset, u32 value)
96{
97 __raw_writel(value,
98 keypad_data->base + keypad_data->reg_offset + offset);
99}
100
101static int kbd_read_irqreg(struct omap4_keypad *keypad_data, u32 offset)
102{
103 return __raw_readl(keypad_data->base +
104 keypad_data->irqreg_offset + offset);
105}
106
107static void kbd_write_irqreg(struct omap4_keypad *keypad_data,
108 u32 offset, u32 value)
109{
110 __raw_writel(value,
111 keypad_data->base + keypad_data->irqreg_offset + offset);
112}
113
114
115/* Interrupt handlers */
116static irqreturn_t omap4_keypad_irq_handler(int irq, void *dev_id)
117{
118 struct omap4_keypad *keypad_data = dev_id;
119
120 if (kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS)) {
121 /* Disable interrupts */
122 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
123 OMAP4_VAL_IRQDISABLE);
124 return IRQ_WAKE_THREAD;
125 }
126
127 return IRQ_NONE;
128}
129
130static irqreturn_t omap4_keypad_irq_thread_fn(int irq, void *dev_id)
131{
132 struct omap4_keypad *keypad_data = dev_id;
133 struct input_dev *input_dev = keypad_data->input;
134 unsigned char key_state[ARRAY_SIZE(keypad_data->key_state)];
135 unsigned int col, row, code, changed;
136 u32 *new_state = (u32 *) key_state;
137
138 *new_state = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE31_0);
139 *(new_state + 1) = kbd_readl(keypad_data, OMAP4_KBD_FULLCODE63_32);
140
141 for (row = 0; row < keypad_data->rows; row++) {
142 changed = key_state[row] ^ keypad_data->key_state[row];
143 if (!changed)
144 continue;
145
146 for (col = 0; col < keypad_data->cols; col++) {
147 if (changed & (1 << col)) {
148 code = MATRIX_SCAN_CODE(row, col,
149 keypad_data->row_shift);
150 input_event(input_dev, EV_MSC, MSC_SCAN, code);
151 input_report_key(input_dev,
152 keypad_data->keymap[code],
153 key_state[row] & (1 << col));
154 }
155 }
156 }
157
158 input_sync(input_dev);
159
160 memcpy(keypad_data->key_state, key_state,
161 sizeof(keypad_data->key_state));
162
163 /* clear pending interrupts */
164 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
165 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
166
167 /* enable interrupts */
168 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
169 OMAP4_DEF_IRQENABLE_EVENTEN |
170 OMAP4_DEF_IRQENABLE_LONGKEY);
171
172 return IRQ_HANDLED;
173}
174
175static int omap4_keypad_open(struct input_dev *input)
176{
177 struct omap4_keypad *keypad_data = input_get_drvdata(input);
178
179 pm_runtime_get_sync(input->dev.parent);
180
181 disable_irq(keypad_data->irq);
182
183 kbd_writel(keypad_data, OMAP4_KBD_CTRL,
184 OMAP4_DEF_CTRL_NOSOFTMODE |
185 (OMAP4_VAL_PVT << OMAP4_DEF_CTRL_PTV_SHIFT));
186 kbd_writel(keypad_data, OMAP4_KBD_DEBOUNCINGTIME,
187 OMAP4_VAL_DEBOUNCINGTIME);
188 /* clear pending interrupts */
189 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
190 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
191 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
192 OMAP4_DEF_IRQENABLE_EVENTEN |
193 OMAP4_DEF_IRQENABLE_LONGKEY);
194 kbd_writel(keypad_data, OMAP4_KBD_WAKEUPENABLE,
195 OMAP4_DEF_WUP_EVENT_ENA | OMAP4_DEF_WUP_LONG_KEY_ENA);
196
197 enable_irq(keypad_data->irq);
198
199 return 0;
200}
201
202static void omap4_keypad_close(struct input_dev *input)
203{
204 struct omap4_keypad *keypad_data = input_get_drvdata(input);
205
206 disable_irq(keypad_data->irq);
207
208 /* Disable interrupts */
209 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQENABLE,
210 OMAP4_VAL_IRQDISABLE);
211
212 /* clear pending interrupts */
213 kbd_write_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS,
214 kbd_read_irqreg(keypad_data, OMAP4_KBD_IRQSTATUS));
215
216 enable_irq(keypad_data->irq);
217
218 pm_runtime_put_sync(input->dev.parent);
219}
220
221#ifdef CONFIG_OF
222static int omap4_keypad_parse_dt(struct device *dev,
223 struct omap4_keypad *keypad_data)
224{
225 struct device_node *np = dev->of_node;
226 int err;
227
228 err = matrix_keypad_parse_of_params(dev, &keypad_data->rows,
229 &keypad_data->cols);
230 if (err)
231 return err;
232
233 if (of_get_property(np, "linux,input-no-autorepeat", NULL))
234 keypad_data->no_autorepeat = true;
235
236 return 0;
237}
238#else
239static inline int omap4_keypad_parse_dt(struct device *dev,
240 struct omap4_keypad *keypad_data)
241{
242 return -ENOSYS;
243}
244#endif
245
246static int omap4_keypad_probe(struct platform_device *pdev)
247{
248 const struct omap4_keypad_platform_data *pdata =
249 dev_get_platdata(&pdev->dev);
250 const struct matrix_keymap_data *keymap_data =
251 pdata ? pdata->keymap_data : NULL;
252 struct omap4_keypad *keypad_data;
253 struct input_dev *input_dev;
254 struct resource *res;
255 unsigned int max_keys;
256 int rev;
257 int irq;
258 int error;
259
260 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
261 if (!res) {
262 dev_err(&pdev->dev, "no base address specified\n");
263 return -EINVAL;
264 }
265
266 irq = platform_get_irq(pdev, 0);
267 if (!irq) {
268 dev_err(&pdev->dev, "no keyboard irq assigned\n");
269 return -EINVAL;
270 }
271
272 keypad_data = kzalloc(sizeof(struct omap4_keypad), GFP_KERNEL);
273 if (!keypad_data) {
274 dev_err(&pdev->dev, "keypad_data memory allocation failed\n");
275 return -ENOMEM;
276 }
277
278 keypad_data->irq = irq;
279
280 if (pdata) {
281 keypad_data->rows = pdata->rows;
282 keypad_data->cols = pdata->cols;
283 } else {
284 error = omap4_keypad_parse_dt(&pdev->dev, keypad_data);
285 if (error)
286 return error;
287 }
288
289 res = request_mem_region(res->start, resource_size(res), pdev->name);
290 if (!res) {
291 dev_err(&pdev->dev, "can't request mem region\n");
292 error = -EBUSY;
293 goto err_free_keypad;
294 }
295
296 keypad_data->base = ioremap(res->start, resource_size(res));
297 if (!keypad_data->base) {
298 dev_err(&pdev->dev, "can't ioremap mem resource\n");
299 error = -ENOMEM;
300 goto err_release_mem;
301 }
302
303
304 /*
305 * Enable clocks for the keypad module so that we can read
306 * revision register.
307 */
308 pm_runtime_enable(&pdev->dev);
309 error = pm_runtime_get_sync(&pdev->dev);
310 if (error) {
311 dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
312 goto err_unmap;
313 }
314 rev = __raw_readl(keypad_data->base + OMAP4_KBD_REVISION);
315 rev &= 0x03 << 30;
316 rev >>= 30;
317 switch (rev) {
318 case KBD_REVISION_OMAP4:
319 keypad_data->reg_offset = 0x00;
320 keypad_data->irqreg_offset = 0x00;
321 break;
322 case KBD_REVISION_OMAP5:
323 keypad_data->reg_offset = 0x10;
324 keypad_data->irqreg_offset = 0x0c;
325 break;
326 default:
327 dev_err(&pdev->dev,
328 "Keypad reports unsupported revision %d", rev);
329 error = -EINVAL;
330 goto err_pm_put_sync;
331 }
332
333 /* input device allocation */
334 keypad_data->input = input_dev = input_allocate_device();
335 if (!input_dev) {
336 error = -ENOMEM;
337 goto err_pm_put_sync;
338 }
339
340 input_dev->name = pdev->name;
341 input_dev->dev.parent = &pdev->dev;
342 input_dev->id.bustype = BUS_HOST;
343 input_dev->id.vendor = 0x0001;
344 input_dev->id.product = 0x0001;
345 input_dev->id.version = 0x0001;
346
347 input_dev->open = omap4_keypad_open;
348 input_dev->close = omap4_keypad_close;
349
350 input_set_capability(input_dev, EV_MSC, MSC_SCAN);
351 if (!keypad_data->no_autorepeat)
352 __set_bit(EV_REP, input_dev->evbit);
353
354 input_set_drvdata(input_dev, keypad_data);
355
356 keypad_data->row_shift = get_count_order(keypad_data->cols);
357 max_keys = keypad_data->rows << keypad_data->row_shift;
358 keypad_data->keymap = kzalloc(max_keys * sizeof(keypad_data->keymap[0]),
359 GFP_KERNEL);
360 if (!keypad_data->keymap) {
361 dev_err(&pdev->dev, "Not enough memory for keymap\n");
362 error = -ENOMEM;
363 goto err_free_input;
364 }
365
366 error = matrix_keypad_build_keymap(keymap_data, NULL,
367 keypad_data->rows, keypad_data->cols,
368 keypad_data->keymap, input_dev);
369 if (error) {
370 dev_err(&pdev->dev, "failed to build keymap\n");
371 goto err_free_keymap;
372 }
373
374 error = request_threaded_irq(keypad_data->irq, omap4_keypad_irq_handler,
375 omap4_keypad_irq_thread_fn, 0,
376 "omap4-keypad", keypad_data);
377 if (error) {
378 dev_err(&pdev->dev, "failed to register interrupt\n");
379 goto err_free_input;
380 }
381
382 device_init_wakeup(&pdev->dev, true);
383 pm_runtime_put_sync(&pdev->dev);
384
385 error = input_register_device(keypad_data->input);
386 if (error < 0) {
387 dev_err(&pdev->dev, "failed to register input device\n");
388 goto err_pm_disable;
389 }
390
391 platform_set_drvdata(pdev, keypad_data);
392 return 0;
393
394err_pm_disable:
395 pm_runtime_disable(&pdev->dev);
396 device_init_wakeup(&pdev->dev, false);
397 free_irq(keypad_data->irq, keypad_data);
398err_free_keymap:
399 kfree(keypad_data->keymap);
400err_free_input:
401 input_free_device(input_dev);
402err_pm_put_sync:
403 pm_runtime_put_sync(&pdev->dev);
404err_unmap:
405 iounmap(keypad_data->base);
406err_release_mem:
407 release_mem_region(res->start, resource_size(res));
408err_free_keypad:
409 kfree(keypad_data);
410 return error;
411}
412
413static int omap4_keypad_remove(struct platform_device *pdev)
414{
415 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
416 struct resource *res;
417
418 free_irq(keypad_data->irq, keypad_data);
419
420 pm_runtime_disable(&pdev->dev);
421
422 device_init_wakeup(&pdev->dev, false);
423
424 input_unregister_device(keypad_data->input);
425
426 iounmap(keypad_data->base);
427
428 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
429 release_mem_region(res->start, resource_size(res));
430
431 kfree(keypad_data->keymap);
432 kfree(keypad_data);
433
434 return 0;
435}
436
437#ifdef CONFIG_OF
438static const struct of_device_id omap_keypad_dt_match[] = {
439 { .compatible = "ti,omap4-keypad" },
440 {},
441};
442MODULE_DEVICE_TABLE(of, omap_keypad_dt_match);
443#endif
444
445#ifdef CONFIG_PM_SLEEP
446static int omap4_keypad_suspend(struct device *dev)
447{
448 struct platform_device *pdev = to_platform_device(dev);
449 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
450 int error;
451
452 if (device_may_wakeup(&pdev->dev)) {
453 error = enable_irq_wake(keypad_data->irq);
454 if (!error)
455 keypad_data->irq_wake_enabled = true;
456 }
457
458 return 0;
459}
460
461static int omap4_keypad_resume(struct device *dev)
462{
463 struct platform_device *pdev = to_platform_device(dev);
464 struct omap4_keypad *keypad_data = platform_get_drvdata(pdev);
465
466 if (device_may_wakeup(&pdev->dev) && keypad_data->irq_wake_enabled) {
467 disable_irq_wake(keypad_data->irq);
468 keypad_data->irq_wake_enabled = false;
469 }
470
471 return 0;
472}
473#endif
474
475static SIMPLE_DEV_PM_OPS(omap4_keypad_pm_ops,
476 omap4_keypad_suspend, omap4_keypad_resume);
477
478static struct platform_driver omap4_keypad_driver = {
479 .probe = omap4_keypad_probe,
480 .remove = omap4_keypad_remove,
481 .driver = {
482 .name = "omap4-keypad",
483 .owner = THIS_MODULE,
484 .pm = &omap4_keypad_pm_ops,
485 .of_match_table = of_match_ptr(omap_keypad_dt_match),
486 },
487};
488module_platform_driver(omap4_keypad_driver);
489
490MODULE_AUTHOR("Texas Instruments");
491MODULE_DESCRIPTION("OMAP4 Keypad Driver");
492MODULE_LICENSE("GPL");
493MODULE_ALIAS("platform:omap4-keypad");