Commit | Line | Data |
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0fffed27 JS |
1 | /* |
2 | * Samsung keypad driver | |
3 | * | |
4 | * Copyright (C) 2010 Samsung Electronics Co.Ltd | |
5 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> | |
6 | * Author: Donghwa Lee <dh09.lee@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/clk.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/err.h> | |
0fffed27 JS |
17 | #include <linux/input.h> |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/platform_device.h> | |
48c98b1b MB |
22 | #include <linux/pm.h> |
23 | #include <linux/pm_runtime.h> | |
0fffed27 | 24 | #include <linux/slab.h> |
b3d6ac3e | 25 | #include <linux/of.h> |
0fffed27 | 26 | #include <linux/sched.h> |
8d964a28 | 27 | #include <linux/input/samsung-keypad.h> |
0fffed27 JS |
28 | |
29 | #define SAMSUNG_KEYIFCON 0x00 | |
30 | #define SAMSUNG_KEYIFSTSCLR 0x04 | |
31 | #define SAMSUNG_KEYIFCOL 0x08 | |
32 | #define SAMSUNG_KEYIFROW 0x0c | |
33 | #define SAMSUNG_KEYIFFC 0x10 | |
34 | ||
35 | /* SAMSUNG_KEYIFCON */ | |
36 | #define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0) | |
37 | #define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1) | |
38 | #define SAMSUNG_KEYIFCON_DF_EN (1 << 2) | |
39 | #define SAMSUNG_KEYIFCON_FC_EN (1 << 3) | |
40 | #define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4) | |
41 | ||
42 | /* SAMSUNG_KEYIFSTSCLR */ | |
43 | #define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0) | |
44 | #define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8) | |
45 | #define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8 | |
46 | #define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0) | |
47 | #define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16) | |
48 | #define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16 | |
49 | ||
50 | /* SAMSUNG_KEYIFCOL */ | |
51 | #define SAMSUNG_KEYIFCOL_MASK (0xff << 0) | |
52 | #define S5PV210_KEYIFCOLEN_MASK (0xff << 8) | |
53 | ||
54 | /* SAMSUNG_KEYIFROW */ | |
55 | #define SAMSUNG_KEYIFROW_MASK (0xff << 0) | |
56 | #define S5PV210_KEYIFROW_MASK (0x3fff << 0) | |
57 | ||
58 | /* SAMSUNG_KEYIFFC */ | |
59 | #define SAMSUNG_KEYIFFC_MASK (0x3ff << 0) | |
60 | ||
61 | enum samsung_keypad_type { | |
62 | KEYPAD_TYPE_SAMSUNG, | |
63 | KEYPAD_TYPE_S5PV210, | |
64 | }; | |
65 | ||
66 | struct samsung_keypad { | |
67 | struct input_dev *input_dev; | |
48c98b1b | 68 | struct platform_device *pdev; |
0fffed27 JS |
69 | struct clk *clk; |
70 | void __iomem *base; | |
71 | wait_queue_head_t wait; | |
72 | bool stopped; | |
48c98b1b | 73 | bool wake_enabled; |
0fffed27 | 74 | int irq; |
b3d6ac3e | 75 | enum samsung_keypad_type type; |
0fffed27 JS |
76 | unsigned int row_shift; |
77 | unsigned int rows; | |
78 | unsigned int cols; | |
79 | unsigned int row_state[SAMSUNG_MAX_COLS]; | |
80 | unsigned short keycodes[]; | |
81 | }; | |
82 | ||
0fffed27 JS |
83 | static void samsung_keypad_scan(struct samsung_keypad *keypad, |
84 | unsigned int *row_state) | |
85 | { | |
0fffed27 JS |
86 | unsigned int col; |
87 | unsigned int val; | |
88 | ||
89 | for (col = 0; col < keypad->cols; col++) { | |
b3d6ac3e | 90 | if (keypad->type == KEYPAD_TYPE_S5PV210) { |
0fffed27 JS |
91 | val = S5PV210_KEYIFCOLEN_MASK; |
92 | val &= ~(1 << col) << 8; | |
93 | } else { | |
94 | val = SAMSUNG_KEYIFCOL_MASK; | |
95 | val &= ~(1 << col); | |
96 | } | |
97 | ||
98 | writel(val, keypad->base + SAMSUNG_KEYIFCOL); | |
99 | mdelay(1); | |
100 | ||
101 | val = readl(keypad->base + SAMSUNG_KEYIFROW); | |
102 | row_state[col] = ~val & ((1 << keypad->rows) - 1); | |
103 | } | |
104 | ||
105 | /* KEYIFCOL reg clear */ | |
106 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); | |
107 | } | |
108 | ||
109 | static bool samsung_keypad_report(struct samsung_keypad *keypad, | |
110 | unsigned int *row_state) | |
111 | { | |
112 | struct input_dev *input_dev = keypad->input_dev; | |
113 | unsigned int changed; | |
114 | unsigned int pressed; | |
115 | unsigned int key_down = 0; | |
116 | unsigned int val; | |
117 | unsigned int col, row; | |
118 | ||
119 | for (col = 0; col < keypad->cols; col++) { | |
120 | changed = row_state[col] ^ keypad->row_state[col]; | |
121 | key_down |= row_state[col]; | |
122 | if (!changed) | |
123 | continue; | |
124 | ||
125 | for (row = 0; row < keypad->rows; row++) { | |
126 | if (!(changed & (1 << row))) | |
127 | continue; | |
128 | ||
129 | pressed = row_state[col] & (1 << row); | |
130 | ||
131 | dev_dbg(&keypad->input_dev->dev, | |
132 | "key %s, row: %d, col: %d\n", | |
133 | pressed ? "pressed" : "released", row, col); | |
134 | ||
135 | val = MATRIX_SCAN_CODE(row, col, keypad->row_shift); | |
136 | ||
137 | input_event(input_dev, EV_MSC, MSC_SCAN, val); | |
138 | input_report_key(input_dev, | |
139 | keypad->keycodes[val], pressed); | |
140 | } | |
141 | input_sync(keypad->input_dev); | |
142 | } | |
143 | ||
144 | memcpy(keypad->row_state, row_state, sizeof(keypad->row_state)); | |
145 | ||
146 | return key_down; | |
147 | } | |
148 | ||
149 | static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) | |
150 | { | |
151 | struct samsung_keypad *keypad = dev_id; | |
152 | unsigned int row_state[SAMSUNG_MAX_COLS]; | |
153 | unsigned int val; | |
154 | bool key_down; | |
155 | ||
48c98b1b MB |
156 | pm_runtime_get_sync(&keypad->pdev->dev); |
157 | ||
0fffed27 JS |
158 | do { |
159 | val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR); | |
160 | /* Clear interrupt. */ | |
161 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); | |
162 | ||
163 | samsung_keypad_scan(keypad, row_state); | |
164 | ||
165 | key_down = samsung_keypad_report(keypad, row_state); | |
166 | if (key_down) | |
167 | wait_event_timeout(keypad->wait, keypad->stopped, | |
168 | msecs_to_jiffies(50)); | |
169 | ||
170 | } while (key_down && !keypad->stopped); | |
171 | ||
69898e51 | 172 | pm_runtime_put(&keypad->pdev->dev); |
48c98b1b | 173 | |
0fffed27 JS |
174 | return IRQ_HANDLED; |
175 | } | |
176 | ||
177 | static void samsung_keypad_start(struct samsung_keypad *keypad) | |
178 | { | |
179 | unsigned int val; | |
180 | ||
48c98b1b MB |
181 | pm_runtime_get_sync(&keypad->pdev->dev); |
182 | ||
0fffed27 JS |
183 | /* Tell IRQ thread that it may poll the device. */ |
184 | keypad->stopped = false; | |
185 | ||
186 | clk_enable(keypad->clk); | |
187 | ||
188 | /* Enable interrupt bits. */ | |
189 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
190 | val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN; | |
191 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
192 | ||
193 | /* KEYIFCOL reg clear. */ | |
194 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); | |
48c98b1b | 195 | |
69898e51 | 196 | pm_runtime_put(&keypad->pdev->dev); |
0fffed27 JS |
197 | } |
198 | ||
199 | static void samsung_keypad_stop(struct samsung_keypad *keypad) | |
200 | { | |
201 | unsigned int val; | |
202 | ||
48c98b1b MB |
203 | pm_runtime_get_sync(&keypad->pdev->dev); |
204 | ||
0fffed27 JS |
205 | /* Signal IRQ thread to stop polling and disable the handler. */ |
206 | keypad->stopped = true; | |
207 | wake_up(&keypad->wait); | |
208 | disable_irq(keypad->irq); | |
209 | ||
210 | /* Clear interrupt. */ | |
211 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); | |
212 | ||
213 | /* Disable interrupt bits. */ | |
214 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
215 | val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN); | |
216 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
217 | ||
218 | clk_disable(keypad->clk); | |
219 | ||
220 | /* | |
221 | * Now that chip should not generate interrupts we can safely | |
222 | * re-enable the handler. | |
223 | */ | |
224 | enable_irq(keypad->irq); | |
48c98b1b | 225 | |
69898e51 | 226 | pm_runtime_put(&keypad->pdev->dev); |
0fffed27 JS |
227 | } |
228 | ||
229 | static int samsung_keypad_open(struct input_dev *input_dev) | |
230 | { | |
231 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); | |
232 | ||
233 | samsung_keypad_start(keypad); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static void samsung_keypad_close(struct input_dev *input_dev) | |
239 | { | |
240 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); | |
241 | ||
242 | samsung_keypad_stop(keypad); | |
243 | } | |
244 | ||
b3d6ac3e | 245 | #ifdef CONFIG_OF |
670d2072 DT |
246 | static struct samsung_keypad_platdata * |
247 | samsung_keypad_parse_dt(struct device *dev) | |
b3d6ac3e TA |
248 | { |
249 | struct samsung_keypad_platdata *pdata; | |
250 | struct matrix_keymap_data *keymap_data; | |
251 | uint32_t *keymap, num_rows = 0, num_cols = 0; | |
252 | struct device_node *np = dev->of_node, *key_np; | |
31b95bfb | 253 | unsigned int key_count; |
b3d6ac3e | 254 | |
670d2072 DT |
255 | if (!np) { |
256 | dev_err(dev, "missing device tree data\n"); | |
257 | return ERR_PTR(-EINVAL); | |
258 | } | |
259 | ||
b3d6ac3e TA |
260 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
261 | if (!pdata) { | |
262 | dev_err(dev, "could not allocate memory for platform data\n"); | |
670d2072 | 263 | return ERR_PTR(-ENOMEM); |
b3d6ac3e TA |
264 | } |
265 | ||
266 | of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); | |
267 | of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); | |
268 | if (!num_rows || !num_cols) { | |
269 | dev_err(dev, "number of keypad rows/columns not specified\n"); | |
670d2072 | 270 | return ERR_PTR(-EINVAL); |
b3d6ac3e TA |
271 | } |
272 | pdata->rows = num_rows; | |
273 | pdata->cols = num_cols; | |
274 | ||
275 | keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); | |
276 | if (!keymap_data) { | |
277 | dev_err(dev, "could not allocate memory for keymap data\n"); | |
670d2072 | 278 | return ERR_PTR(-ENOMEM); |
b3d6ac3e TA |
279 | } |
280 | pdata->keymap_data = keymap_data; | |
281 | ||
31b95bfb | 282 | key_count = of_get_child_count(np); |
b3d6ac3e TA |
283 | keymap_data->keymap_size = key_count; |
284 | keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); | |
285 | if (!keymap) { | |
286 | dev_err(dev, "could not allocate memory for keymap\n"); | |
670d2072 | 287 | return ERR_PTR(-ENOMEM); |
b3d6ac3e TA |
288 | } |
289 | keymap_data->keymap = keymap; | |
290 | ||
291 | for_each_child_of_node(np, key_np) { | |
292 | u32 row, col, key_code; | |
293 | of_property_read_u32(key_np, "keypad,row", &row); | |
294 | of_property_read_u32(key_np, "keypad,column", &col); | |
295 | of_property_read_u32(key_np, "linux,code", &key_code); | |
296 | *keymap++ = KEY(row, col, key_code); | |
297 | } | |
298 | ||
299 | if (of_get_property(np, "linux,input-no-autorepeat", NULL)) | |
300 | pdata->no_autorepeat = true; | |
670d2072 | 301 | |
43b7be3b DT |
302 | pdata->wakeup = of_property_read_bool(np, "wakeup-source") || |
303 | /* legacy name */ | |
304 | of_property_read_bool(np, "linux,input-wakeup"); | |
305 | ||
b3d6ac3e TA |
306 | |
307 | return pdata; | |
308 | } | |
b3d6ac3e | 309 | #else |
670d2072 DT |
310 | static struct samsung_keypad_platdata * |
311 | samsung_keypad_parse_dt(struct device *dev) | |
b3d6ac3e | 312 | { |
670d2072 DT |
313 | dev_err(dev, "no platform data defined\n"); |
314 | ||
315 | return ERR_PTR(-EINVAL); | |
b3d6ac3e | 316 | } |
b3d6ac3e TA |
317 | #endif |
318 | ||
5298cc4c | 319 | static int samsung_keypad_probe(struct platform_device *pdev) |
0fffed27 JS |
320 | { |
321 | const struct samsung_keypad_platdata *pdata; | |
322 | const struct matrix_keymap_data *keymap_data; | |
323 | struct samsung_keypad *keypad; | |
324 | struct resource *res; | |
325 | struct input_dev *input_dev; | |
326 | unsigned int row_shift; | |
327 | unsigned int keymap_size; | |
328 | int error; | |
329 | ||
670d2072 | 330 | pdata = dev_get_platdata(&pdev->dev); |
0fffed27 | 331 | if (!pdata) { |
670d2072 DT |
332 | pdata = samsung_keypad_parse_dt(&pdev->dev); |
333 | if (IS_ERR(pdata)) | |
334 | return PTR_ERR(pdata); | |
0fffed27 JS |
335 | } |
336 | ||
337 | keymap_data = pdata->keymap_data; | |
338 | if (!keymap_data) { | |
339 | dev_err(&pdev->dev, "no keymap data defined\n"); | |
340 | return -EINVAL; | |
341 | } | |
342 | ||
343 | if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS) | |
344 | return -EINVAL; | |
345 | ||
346 | if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS) | |
347 | return -EINVAL; | |
348 | ||
349 | /* initialize the gpio */ | |
350 | if (pdata->cfg_gpio) | |
351 | pdata->cfg_gpio(pdata->rows, pdata->cols); | |
352 | ||
353 | row_shift = get_count_order(pdata->cols); | |
354 | keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]); | |
355 | ||
a57da347 SK |
356 | keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad) + keymap_size, |
357 | GFP_KERNEL); | |
358 | input_dev = devm_input_allocate_device(&pdev->dev); | |
359 | if (!keypad || !input_dev) | |
360 | return -ENOMEM; | |
0fffed27 JS |
361 | |
362 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
a57da347 SK |
363 | if (!res) |
364 | return -ENODEV; | |
0fffed27 | 365 | |
a57da347 SK |
366 | keypad->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); |
367 | if (!keypad->base) | |
368 | return -EBUSY; | |
0fffed27 | 369 | |
a57da347 | 370 | keypad->clk = devm_clk_get(&pdev->dev, "keypad"); |
0fffed27 JS |
371 | if (IS_ERR(keypad->clk)) { |
372 | dev_err(&pdev->dev, "failed to get keypad clk\n"); | |
a57da347 | 373 | return PTR_ERR(keypad->clk); |
0fffed27 JS |
374 | } |
375 | ||
aba828ce TA |
376 | error = clk_prepare(keypad->clk); |
377 | if (error) { | |
378 | dev_err(&pdev->dev, "keypad clock prepare failed\n"); | |
a57da347 | 379 | return error; |
aba828ce TA |
380 | } |
381 | ||
0fffed27 | 382 | keypad->input_dev = input_dev; |
48c98b1b | 383 | keypad->pdev = pdev; |
0fffed27 JS |
384 | keypad->row_shift = row_shift; |
385 | keypad->rows = pdata->rows; | |
386 | keypad->cols = pdata->cols; | |
48c98b1b | 387 | keypad->stopped = true; |
0fffed27 JS |
388 | init_waitqueue_head(&keypad->wait); |
389 | ||
41cc2aaf | 390 | if (pdev->dev.of_node) |
b3d6ac3e TA |
391 | keypad->type = of_device_is_compatible(pdev->dev.of_node, |
392 | "samsung,s5pv210-keypad"); | |
41cc2aaf | 393 | else |
b3d6ac3e | 394 | keypad->type = platform_get_device_id(pdev)->driver_data; |
b3d6ac3e | 395 | |
0fffed27 JS |
396 | input_dev->name = pdev->name; |
397 | input_dev->id.bustype = BUS_HOST; | |
398 | input_dev->dev.parent = &pdev->dev; | |
0fffed27 JS |
399 | |
400 | input_dev->open = samsung_keypad_open; | |
401 | input_dev->close = samsung_keypad_close; | |
402 | ||
1932811f DT |
403 | error = matrix_keypad_build_keymap(keymap_data, NULL, |
404 | pdata->rows, pdata->cols, | |
405 | keypad->keycodes, input_dev); | |
406 | if (error) { | |
407 | dev_err(&pdev->dev, "failed to build keymap\n"); | |
aba828ce | 408 | goto err_unprepare_clk; |
1932811f | 409 | } |
0fffed27 JS |
410 | |
411 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); | |
1932811f DT |
412 | if (!pdata->no_autorepeat) |
413 | __set_bit(EV_REP, input_dev->evbit); | |
0fffed27 | 414 | |
1932811f | 415 | input_set_drvdata(input_dev, keypad); |
0fffed27 JS |
416 | |
417 | keypad->irq = platform_get_irq(pdev, 0); | |
418 | if (keypad->irq < 0) { | |
419 | error = keypad->irq; | |
a57da347 | 420 | goto err_unprepare_clk; |
0fffed27 JS |
421 | } |
422 | ||
a57da347 SK |
423 | error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL, |
424 | samsung_keypad_irq, IRQF_ONESHOT, | |
425 | dev_name(&pdev->dev), keypad); | |
0fffed27 JS |
426 | if (error) { |
427 | dev_err(&pdev->dev, "failed to register keypad interrupt\n"); | |
a57da347 | 428 | goto err_unprepare_clk; |
0fffed27 JS |
429 | } |
430 | ||
48c98b1b MB |
431 | device_init_wakeup(&pdev->dev, pdata->wakeup); |
432 | platform_set_drvdata(pdev, keypad); | |
433 | pm_runtime_enable(&pdev->dev); | |
434 | ||
0fffed27 JS |
435 | error = input_register_device(keypad->input_dev); |
436 | if (error) | |
a57da347 | 437 | goto err_disable_runtime_pm; |
0fffed27 | 438 | |
b3d6ac3e TA |
439 | if (pdev->dev.of_node) { |
440 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); | |
441 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data); | |
442 | devm_kfree(&pdev->dev, (void *)pdata); | |
443 | } | |
0fffed27 JS |
444 | return 0; |
445 | ||
a57da347 | 446 | err_disable_runtime_pm: |
48c98b1b MB |
447 | pm_runtime_disable(&pdev->dev); |
448 | device_init_wakeup(&pdev->dev, 0); | |
aba828ce TA |
449 | err_unprepare_clk: |
450 | clk_unprepare(keypad->clk); | |
0fffed27 JS |
451 | return error; |
452 | } | |
453 | ||
e2619cf7 | 454 | static int samsung_keypad_remove(struct platform_device *pdev) |
0fffed27 JS |
455 | { |
456 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
457 | ||
48c98b1b | 458 | pm_runtime_disable(&pdev->dev); |
0fffed27 | 459 | device_init_wakeup(&pdev->dev, 0); |
0fffed27 JS |
460 | |
461 | input_unregister_device(keypad->input_dev); | |
462 | ||
aba828ce | 463 | clk_unprepare(keypad->clk); |
0fffed27 JS |
464 | |
465 | return 0; | |
466 | } | |
467 | ||
dc5686e4 | 468 | #ifdef CONFIG_PM |
48c98b1b MB |
469 | static int samsung_keypad_runtime_suspend(struct device *dev) |
470 | { | |
471 | struct platform_device *pdev = to_platform_device(dev); | |
472 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
473 | unsigned int val; | |
474 | int error; | |
475 | ||
476 | if (keypad->stopped) | |
477 | return 0; | |
478 | ||
479 | /* This may fail on some SoCs due to lack of controller support */ | |
480 | error = enable_irq_wake(keypad->irq); | |
481 | if (!error) | |
482 | keypad->wake_enabled = true; | |
483 | ||
484 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
485 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; | |
486 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
487 | ||
488 | clk_disable(keypad->clk); | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int samsung_keypad_runtime_resume(struct device *dev) | |
494 | { | |
495 | struct platform_device *pdev = to_platform_device(dev); | |
496 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
497 | unsigned int val; | |
498 | ||
499 | if (keypad->stopped) | |
500 | return 0; | |
501 | ||
502 | clk_enable(keypad->clk); | |
503 | ||
504 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
505 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; | |
506 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
507 | ||
508 | if (keypad->wake_enabled) | |
509 | disable_irq_wake(keypad->irq); | |
510 | ||
511 | return 0; | |
512 | } | |
513 | #endif | |
514 | ||
400bf299 | 515 | #ifdef CONFIG_PM_SLEEP |
0fffed27 JS |
516 | static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, |
517 | bool enable) | |
518 | { | |
0fffed27 JS |
519 | unsigned int val; |
520 | ||
521 | clk_enable(keypad->clk); | |
522 | ||
523 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
524 | if (enable) { | |
525 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; | |
48c98b1b | 526 | if (device_may_wakeup(&keypad->pdev->dev)) |
0fffed27 JS |
527 | enable_irq_wake(keypad->irq); |
528 | } else { | |
529 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; | |
48c98b1b | 530 | if (device_may_wakeup(&keypad->pdev->dev)) |
0fffed27 JS |
531 | disable_irq_wake(keypad->irq); |
532 | } | |
533 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
534 | ||
535 | clk_disable(keypad->clk); | |
536 | } | |
537 | ||
538 | static int samsung_keypad_suspend(struct device *dev) | |
539 | { | |
540 | struct platform_device *pdev = to_platform_device(dev); | |
541 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
542 | struct input_dev *input_dev = keypad->input_dev; | |
543 | ||
544 | mutex_lock(&input_dev->mutex); | |
545 | ||
546 | if (input_dev->users) | |
547 | samsung_keypad_stop(keypad); | |
548 | ||
549 | samsung_keypad_toggle_wakeup(keypad, true); | |
550 | ||
551 | mutex_unlock(&input_dev->mutex); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static int samsung_keypad_resume(struct device *dev) | |
557 | { | |
558 | struct platform_device *pdev = to_platform_device(dev); | |
559 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
560 | struct input_dev *input_dev = keypad->input_dev; | |
561 | ||
562 | mutex_lock(&input_dev->mutex); | |
563 | ||
564 | samsung_keypad_toggle_wakeup(keypad, false); | |
565 | ||
566 | if (input_dev->users) | |
567 | samsung_keypad_start(keypad); | |
568 | ||
569 | mutex_unlock(&input_dev->mutex); | |
570 | ||
571 | return 0; | |
572 | } | |
0fffed27 JS |
573 | #endif |
574 | ||
48c98b1b MB |
575 | static const struct dev_pm_ops samsung_keypad_pm_ops = { |
576 | SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume) | |
577 | SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend, | |
578 | samsung_keypad_runtime_resume, NULL) | |
579 | }; | |
400bf299 | 580 | |
b3d6ac3e TA |
581 | #ifdef CONFIG_OF |
582 | static const struct of_device_id samsung_keypad_dt_match[] = { | |
583 | { .compatible = "samsung,s3c6410-keypad" }, | |
584 | { .compatible = "samsung,s5pv210-keypad" }, | |
585 | {}, | |
586 | }; | |
587 | MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match); | |
b3d6ac3e TA |
588 | #endif |
589 | ||
8550b073 | 590 | static const struct platform_device_id samsung_keypad_driver_ids[] = { |
0fffed27 JS |
591 | { |
592 | .name = "samsung-keypad", | |
593 | .driver_data = KEYPAD_TYPE_SAMSUNG, | |
594 | }, { | |
595 | .name = "s5pv210-keypad", | |
596 | .driver_data = KEYPAD_TYPE_S5PV210, | |
597 | }, | |
598 | { }, | |
599 | }; | |
600 | MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids); | |
601 | ||
602 | static struct platform_driver samsung_keypad_driver = { | |
603 | .probe = samsung_keypad_probe, | |
1cb0aa88 | 604 | .remove = samsung_keypad_remove, |
0fffed27 JS |
605 | .driver = { |
606 | .name = "samsung-keypad", | |
f4d4661b | 607 | .of_match_table = of_match_ptr(samsung_keypad_dt_match), |
0fffed27 | 608 | .pm = &samsung_keypad_pm_ops, |
0fffed27 JS |
609 | }, |
610 | .id_table = samsung_keypad_driver_ids, | |
611 | }; | |
5146c84f | 612 | module_platform_driver(samsung_keypad_driver); |
0fffed27 JS |
613 | |
614 | MODULE_DESCRIPTION("Samsung keypad driver"); | |
615 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
616 | MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); | |
617 | MODULE_LICENSE("GPL"); |