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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> | |
17 | #include <linux/init.h> | |
18 | #include <linux/input.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/platform_device.h> | |
48c98b1b MB |
23 | #include <linux/pm.h> |
24 | #include <linux/pm_runtime.h> | |
0fffed27 | 25 | #include <linux/slab.h> |
b3d6ac3e TA |
26 | #include <linux/of.h> |
27 | #include <linux/of_gpio.h> | |
0fffed27 | 28 | #include <linux/sched.h> |
8d964a28 | 29 | #include <linux/input/samsung-keypad.h> |
0fffed27 JS |
30 | |
31 | #define SAMSUNG_KEYIFCON 0x00 | |
32 | #define SAMSUNG_KEYIFSTSCLR 0x04 | |
33 | #define SAMSUNG_KEYIFCOL 0x08 | |
34 | #define SAMSUNG_KEYIFROW 0x0c | |
35 | #define SAMSUNG_KEYIFFC 0x10 | |
36 | ||
37 | /* SAMSUNG_KEYIFCON */ | |
38 | #define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0) | |
39 | #define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1) | |
40 | #define SAMSUNG_KEYIFCON_DF_EN (1 << 2) | |
41 | #define SAMSUNG_KEYIFCON_FC_EN (1 << 3) | |
42 | #define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4) | |
43 | ||
44 | /* SAMSUNG_KEYIFSTSCLR */ | |
45 | #define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0) | |
46 | #define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8) | |
47 | #define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8 | |
48 | #define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0) | |
49 | #define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16) | |
50 | #define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16 | |
51 | ||
52 | /* SAMSUNG_KEYIFCOL */ | |
53 | #define SAMSUNG_KEYIFCOL_MASK (0xff << 0) | |
54 | #define S5PV210_KEYIFCOLEN_MASK (0xff << 8) | |
55 | ||
56 | /* SAMSUNG_KEYIFROW */ | |
57 | #define SAMSUNG_KEYIFROW_MASK (0xff << 0) | |
58 | #define S5PV210_KEYIFROW_MASK (0x3fff << 0) | |
59 | ||
60 | /* SAMSUNG_KEYIFFC */ | |
61 | #define SAMSUNG_KEYIFFC_MASK (0x3ff << 0) | |
62 | ||
63 | enum samsung_keypad_type { | |
64 | KEYPAD_TYPE_SAMSUNG, | |
65 | KEYPAD_TYPE_S5PV210, | |
66 | }; | |
67 | ||
68 | struct samsung_keypad { | |
69 | struct input_dev *input_dev; | |
48c98b1b | 70 | struct platform_device *pdev; |
0fffed27 JS |
71 | struct clk *clk; |
72 | void __iomem *base; | |
73 | wait_queue_head_t wait; | |
74 | bool stopped; | |
48c98b1b | 75 | bool wake_enabled; |
0fffed27 | 76 | int irq; |
b3d6ac3e | 77 | enum samsung_keypad_type type; |
0fffed27 JS |
78 | unsigned int row_shift; |
79 | unsigned int rows; | |
80 | unsigned int cols; | |
81 | unsigned int row_state[SAMSUNG_MAX_COLS]; | |
b3d6ac3e TA |
82 | #ifdef CONFIG_OF |
83 | int row_gpios[SAMSUNG_MAX_ROWS]; | |
84 | int col_gpios[SAMSUNG_MAX_COLS]; | |
85 | #endif | |
0fffed27 JS |
86 | unsigned short keycodes[]; |
87 | }; | |
88 | ||
0fffed27 JS |
89 | static void samsung_keypad_scan(struct samsung_keypad *keypad, |
90 | unsigned int *row_state) | |
91 | { | |
0fffed27 JS |
92 | unsigned int col; |
93 | unsigned int val; | |
94 | ||
95 | for (col = 0; col < keypad->cols; col++) { | |
b3d6ac3e | 96 | if (keypad->type == KEYPAD_TYPE_S5PV210) { |
0fffed27 JS |
97 | val = S5PV210_KEYIFCOLEN_MASK; |
98 | val &= ~(1 << col) << 8; | |
99 | } else { | |
100 | val = SAMSUNG_KEYIFCOL_MASK; | |
101 | val &= ~(1 << col); | |
102 | } | |
103 | ||
104 | writel(val, keypad->base + SAMSUNG_KEYIFCOL); | |
105 | mdelay(1); | |
106 | ||
107 | val = readl(keypad->base + SAMSUNG_KEYIFROW); | |
108 | row_state[col] = ~val & ((1 << keypad->rows) - 1); | |
109 | } | |
110 | ||
111 | /* KEYIFCOL reg clear */ | |
112 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); | |
113 | } | |
114 | ||
115 | static bool samsung_keypad_report(struct samsung_keypad *keypad, | |
116 | unsigned int *row_state) | |
117 | { | |
118 | struct input_dev *input_dev = keypad->input_dev; | |
119 | unsigned int changed; | |
120 | unsigned int pressed; | |
121 | unsigned int key_down = 0; | |
122 | unsigned int val; | |
123 | unsigned int col, row; | |
124 | ||
125 | for (col = 0; col < keypad->cols; col++) { | |
126 | changed = row_state[col] ^ keypad->row_state[col]; | |
127 | key_down |= row_state[col]; | |
128 | if (!changed) | |
129 | continue; | |
130 | ||
131 | for (row = 0; row < keypad->rows; row++) { | |
132 | if (!(changed & (1 << row))) | |
133 | continue; | |
134 | ||
135 | pressed = row_state[col] & (1 << row); | |
136 | ||
137 | dev_dbg(&keypad->input_dev->dev, | |
138 | "key %s, row: %d, col: %d\n", | |
139 | pressed ? "pressed" : "released", row, col); | |
140 | ||
141 | val = MATRIX_SCAN_CODE(row, col, keypad->row_shift); | |
142 | ||
143 | input_event(input_dev, EV_MSC, MSC_SCAN, val); | |
144 | input_report_key(input_dev, | |
145 | keypad->keycodes[val], pressed); | |
146 | } | |
147 | input_sync(keypad->input_dev); | |
148 | } | |
149 | ||
150 | memcpy(keypad->row_state, row_state, sizeof(keypad->row_state)); | |
151 | ||
152 | return key_down; | |
153 | } | |
154 | ||
155 | static irqreturn_t samsung_keypad_irq(int irq, void *dev_id) | |
156 | { | |
157 | struct samsung_keypad *keypad = dev_id; | |
158 | unsigned int row_state[SAMSUNG_MAX_COLS]; | |
159 | unsigned int val; | |
160 | bool key_down; | |
161 | ||
48c98b1b MB |
162 | pm_runtime_get_sync(&keypad->pdev->dev); |
163 | ||
0fffed27 JS |
164 | do { |
165 | val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR); | |
166 | /* Clear interrupt. */ | |
167 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); | |
168 | ||
169 | samsung_keypad_scan(keypad, row_state); | |
170 | ||
171 | key_down = samsung_keypad_report(keypad, row_state); | |
172 | if (key_down) | |
173 | wait_event_timeout(keypad->wait, keypad->stopped, | |
174 | msecs_to_jiffies(50)); | |
175 | ||
176 | } while (key_down && !keypad->stopped); | |
177 | ||
69898e51 | 178 | pm_runtime_put(&keypad->pdev->dev); |
48c98b1b | 179 | |
0fffed27 JS |
180 | return IRQ_HANDLED; |
181 | } | |
182 | ||
183 | static void samsung_keypad_start(struct samsung_keypad *keypad) | |
184 | { | |
185 | unsigned int val; | |
186 | ||
48c98b1b MB |
187 | pm_runtime_get_sync(&keypad->pdev->dev); |
188 | ||
0fffed27 JS |
189 | /* Tell IRQ thread that it may poll the device. */ |
190 | keypad->stopped = false; | |
191 | ||
192 | clk_enable(keypad->clk); | |
193 | ||
194 | /* Enable interrupt bits. */ | |
195 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
196 | val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN; | |
197 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
198 | ||
199 | /* KEYIFCOL reg clear. */ | |
200 | writel(0, keypad->base + SAMSUNG_KEYIFCOL); | |
48c98b1b | 201 | |
69898e51 | 202 | pm_runtime_put(&keypad->pdev->dev); |
0fffed27 JS |
203 | } |
204 | ||
205 | static void samsung_keypad_stop(struct samsung_keypad *keypad) | |
206 | { | |
207 | unsigned int val; | |
208 | ||
48c98b1b MB |
209 | pm_runtime_get_sync(&keypad->pdev->dev); |
210 | ||
0fffed27 JS |
211 | /* Signal IRQ thread to stop polling and disable the handler. */ |
212 | keypad->stopped = true; | |
213 | wake_up(&keypad->wait); | |
214 | disable_irq(keypad->irq); | |
215 | ||
216 | /* Clear interrupt. */ | |
217 | writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR); | |
218 | ||
219 | /* Disable interrupt bits. */ | |
220 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
221 | val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN); | |
222 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
223 | ||
224 | clk_disable(keypad->clk); | |
225 | ||
226 | /* | |
227 | * Now that chip should not generate interrupts we can safely | |
228 | * re-enable the handler. | |
229 | */ | |
230 | enable_irq(keypad->irq); | |
48c98b1b | 231 | |
69898e51 | 232 | pm_runtime_put(&keypad->pdev->dev); |
0fffed27 JS |
233 | } |
234 | ||
235 | static int samsung_keypad_open(struct input_dev *input_dev) | |
236 | { | |
237 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); | |
238 | ||
239 | samsung_keypad_start(keypad); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static void samsung_keypad_close(struct input_dev *input_dev) | |
245 | { | |
246 | struct samsung_keypad *keypad = input_get_drvdata(input_dev); | |
247 | ||
248 | samsung_keypad_stop(keypad); | |
249 | } | |
250 | ||
b3d6ac3e TA |
251 | #ifdef CONFIG_OF |
252 | static struct samsung_keypad_platdata *samsung_keypad_parse_dt( | |
253 | struct device *dev) | |
254 | { | |
255 | struct samsung_keypad_platdata *pdata; | |
256 | struct matrix_keymap_data *keymap_data; | |
257 | uint32_t *keymap, num_rows = 0, num_cols = 0; | |
258 | struct device_node *np = dev->of_node, *key_np; | |
259 | unsigned int key_count = 0; | |
260 | ||
261 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
262 | if (!pdata) { | |
263 | dev_err(dev, "could not allocate memory for platform data\n"); | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows); | |
268 | of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols); | |
269 | if (!num_rows || !num_cols) { | |
270 | dev_err(dev, "number of keypad rows/columns not specified\n"); | |
271 | return NULL; | |
272 | } | |
273 | pdata->rows = num_rows; | |
274 | pdata->cols = num_cols; | |
275 | ||
276 | keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL); | |
277 | if (!keymap_data) { | |
278 | dev_err(dev, "could not allocate memory for keymap data\n"); | |
279 | return NULL; | |
280 | } | |
281 | pdata->keymap_data = keymap_data; | |
282 | ||
283 | for_each_child_of_node(np, key_np) | |
284 | key_count++; | |
285 | ||
286 | keymap_data->keymap_size = key_count; | |
287 | keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL); | |
288 | if (!keymap) { | |
289 | dev_err(dev, "could not allocate memory for keymap\n"); | |
290 | return NULL; | |
291 | } | |
292 | keymap_data->keymap = keymap; | |
293 | ||
294 | for_each_child_of_node(np, key_np) { | |
295 | u32 row, col, key_code; | |
296 | of_property_read_u32(key_np, "keypad,row", &row); | |
297 | of_property_read_u32(key_np, "keypad,column", &col); | |
298 | of_property_read_u32(key_np, "linux,code", &key_code); | |
299 | *keymap++ = KEY(row, col, key_code); | |
300 | } | |
301 | ||
302 | if (of_get_property(np, "linux,input-no-autorepeat", NULL)) | |
303 | pdata->no_autorepeat = true; | |
304 | if (of_get_property(np, "linux,input-wakeup", NULL)) | |
305 | pdata->wakeup = true; | |
306 | ||
307 | return pdata; | |
308 | } | |
309 | ||
310 | static void samsung_keypad_parse_dt_gpio(struct device *dev, | |
311 | struct samsung_keypad *keypad) | |
312 | { | |
313 | struct device_node *np = dev->of_node; | |
314 | int gpio, ret, row, col; | |
315 | ||
316 | for (row = 0; row < keypad->rows; row++) { | |
317 | gpio = of_get_named_gpio(np, "row-gpios", row); | |
318 | keypad->row_gpios[row] = gpio; | |
319 | if (!gpio_is_valid(gpio)) { | |
320 | dev_err(dev, "keypad row[%d]: invalid gpio %d\n", | |
321 | row, gpio); | |
322 | continue; | |
323 | } | |
324 | ||
325 | ret = gpio_request(gpio, "keypad-row"); | |
326 | if (ret) | |
327 | dev_err(dev, "keypad row[%d] gpio request failed\n", | |
328 | row); | |
329 | } | |
330 | ||
331 | for (col = 0; col < keypad->cols; col++) { | |
332 | gpio = of_get_named_gpio(np, "col-gpios", col); | |
333 | keypad->col_gpios[col] = gpio; | |
334 | if (!gpio_is_valid(gpio)) { | |
335 | dev_err(dev, "keypad column[%d]: invalid gpio %d\n", | |
336 | col, gpio); | |
337 | continue; | |
338 | } | |
339 | ||
340 | ret = gpio_request(gpio, "keypad-col"); | |
341 | if (ret) | |
342 | dev_err(dev, "keypad column[%d] gpio request failed\n", | |
343 | col); | |
344 | } | |
345 | } | |
346 | ||
347 | static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) | |
348 | { | |
349 | int cnt; | |
350 | ||
351 | for (cnt = 0; cnt < keypad->rows; cnt++) | |
352 | if (gpio_is_valid(keypad->row_gpios[cnt])) | |
353 | gpio_free(keypad->row_gpios[cnt]); | |
354 | ||
355 | for (cnt = 0; cnt < keypad->cols; cnt++) | |
356 | if (gpio_is_valid(keypad->col_gpios[cnt])) | |
357 | gpio_free(keypad->col_gpios[cnt]); | |
358 | } | |
359 | #else | |
360 | static | |
361 | struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev) | |
362 | { | |
363 | return NULL; | |
364 | } | |
365 | ||
366 | static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad) | |
367 | { | |
368 | } | |
369 | #endif | |
370 | ||
0fffed27 JS |
371 | static int __devinit samsung_keypad_probe(struct platform_device *pdev) |
372 | { | |
373 | const struct samsung_keypad_platdata *pdata; | |
374 | const struct matrix_keymap_data *keymap_data; | |
375 | struct samsung_keypad *keypad; | |
376 | struct resource *res; | |
377 | struct input_dev *input_dev; | |
378 | unsigned int row_shift; | |
379 | unsigned int keymap_size; | |
380 | int error; | |
381 | ||
b3d6ac3e TA |
382 | if (pdev->dev.of_node) |
383 | pdata = samsung_keypad_parse_dt(&pdev->dev); | |
384 | else | |
385 | pdata = pdev->dev.platform_data; | |
0fffed27 JS |
386 | if (!pdata) { |
387 | dev_err(&pdev->dev, "no platform data defined\n"); | |
388 | return -EINVAL; | |
389 | } | |
390 | ||
391 | keymap_data = pdata->keymap_data; | |
392 | if (!keymap_data) { | |
393 | dev_err(&pdev->dev, "no keymap data defined\n"); | |
394 | return -EINVAL; | |
395 | } | |
396 | ||
397 | if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS) | |
398 | return -EINVAL; | |
399 | ||
400 | if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS) | |
401 | return -EINVAL; | |
402 | ||
403 | /* initialize the gpio */ | |
404 | if (pdata->cfg_gpio) | |
405 | pdata->cfg_gpio(pdata->rows, pdata->cols); | |
406 | ||
407 | row_shift = get_count_order(pdata->cols); | |
408 | keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]); | |
409 | ||
410 | keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL); | |
411 | input_dev = input_allocate_device(); | |
412 | if (!keypad || !input_dev) { | |
413 | error = -ENOMEM; | |
414 | goto err_free_mem; | |
415 | } | |
416 | ||
417 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
418 | if (!res) { | |
419 | error = -ENODEV; | |
420 | goto err_free_mem; | |
421 | } | |
422 | ||
423 | keypad->base = ioremap(res->start, resource_size(res)); | |
424 | if (!keypad->base) { | |
425 | error = -EBUSY; | |
426 | goto err_free_mem; | |
427 | } | |
428 | ||
429 | keypad->clk = clk_get(&pdev->dev, "keypad"); | |
430 | if (IS_ERR(keypad->clk)) { | |
431 | dev_err(&pdev->dev, "failed to get keypad clk\n"); | |
432 | error = PTR_ERR(keypad->clk); | |
433 | goto err_unmap_base; | |
434 | } | |
435 | ||
436 | keypad->input_dev = input_dev; | |
48c98b1b | 437 | keypad->pdev = pdev; |
0fffed27 JS |
438 | keypad->row_shift = row_shift; |
439 | keypad->rows = pdata->rows; | |
440 | keypad->cols = pdata->cols; | |
48c98b1b | 441 | keypad->stopped = true; |
0fffed27 JS |
442 | init_waitqueue_head(&keypad->wait); |
443 | ||
b3d6ac3e TA |
444 | if (pdev->dev.of_node) { |
445 | #ifdef CONFIG_OF | |
446 | samsung_keypad_parse_dt_gpio(&pdev->dev, keypad); | |
447 | keypad->type = of_device_is_compatible(pdev->dev.of_node, | |
448 | "samsung,s5pv210-keypad"); | |
449 | #endif | |
450 | } else { | |
451 | keypad->type = platform_get_device_id(pdev)->driver_data; | |
452 | } | |
453 | ||
0fffed27 JS |
454 | input_dev->name = pdev->name; |
455 | input_dev->id.bustype = BUS_HOST; | |
456 | input_dev->dev.parent = &pdev->dev; | |
0fffed27 JS |
457 | |
458 | input_dev->open = samsung_keypad_open; | |
459 | input_dev->close = samsung_keypad_close; | |
460 | ||
1932811f DT |
461 | error = matrix_keypad_build_keymap(keymap_data, NULL, |
462 | pdata->rows, pdata->cols, | |
463 | keypad->keycodes, input_dev); | |
464 | if (error) { | |
465 | dev_err(&pdev->dev, "failed to build keymap\n"); | |
466 | goto err_put_clk; | |
467 | } | |
0fffed27 JS |
468 | |
469 | input_set_capability(input_dev, EV_MSC, MSC_SCAN); | |
1932811f DT |
470 | if (!pdata->no_autorepeat) |
471 | __set_bit(EV_REP, input_dev->evbit); | |
0fffed27 | 472 | |
1932811f | 473 | input_set_drvdata(input_dev, keypad); |
0fffed27 JS |
474 | |
475 | keypad->irq = platform_get_irq(pdev, 0); | |
476 | if (keypad->irq < 0) { | |
477 | error = keypad->irq; | |
478 | goto err_put_clk; | |
479 | } | |
480 | ||
481 | error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq, | |
482 | IRQF_ONESHOT, dev_name(&pdev->dev), keypad); | |
483 | if (error) { | |
484 | dev_err(&pdev->dev, "failed to register keypad interrupt\n"); | |
485 | goto err_put_clk; | |
486 | } | |
487 | ||
48c98b1b MB |
488 | device_init_wakeup(&pdev->dev, pdata->wakeup); |
489 | platform_set_drvdata(pdev, keypad); | |
490 | pm_runtime_enable(&pdev->dev); | |
491 | ||
0fffed27 JS |
492 | error = input_register_device(keypad->input_dev); |
493 | if (error) | |
494 | goto err_free_irq; | |
495 | ||
b3d6ac3e TA |
496 | if (pdev->dev.of_node) { |
497 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap); | |
498 | devm_kfree(&pdev->dev, (void *)pdata->keymap_data); | |
499 | devm_kfree(&pdev->dev, (void *)pdata); | |
500 | } | |
0fffed27 JS |
501 | return 0; |
502 | ||
503 | err_free_irq: | |
504 | free_irq(keypad->irq, keypad); | |
48c98b1b MB |
505 | pm_runtime_disable(&pdev->dev); |
506 | device_init_wakeup(&pdev->dev, 0); | |
507 | platform_set_drvdata(pdev, NULL); | |
0fffed27 JS |
508 | err_put_clk: |
509 | clk_put(keypad->clk); | |
b3d6ac3e | 510 | samsung_keypad_dt_gpio_free(keypad); |
0fffed27 JS |
511 | err_unmap_base: |
512 | iounmap(keypad->base); | |
513 | err_free_mem: | |
514 | input_free_device(input_dev); | |
515 | kfree(keypad); | |
516 | ||
517 | return error; | |
518 | } | |
519 | ||
520 | static int __devexit samsung_keypad_remove(struct platform_device *pdev) | |
521 | { | |
522 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
523 | ||
48c98b1b | 524 | pm_runtime_disable(&pdev->dev); |
0fffed27 JS |
525 | device_init_wakeup(&pdev->dev, 0); |
526 | platform_set_drvdata(pdev, NULL); | |
527 | ||
528 | input_unregister_device(keypad->input_dev); | |
529 | ||
530 | /* | |
531 | * It is safe to free IRQ after unregistering device because | |
532 | * samsung_keypad_close will shut off interrupts. | |
533 | */ | |
534 | free_irq(keypad->irq, keypad); | |
535 | ||
536 | clk_put(keypad->clk); | |
b3d6ac3e | 537 | samsung_keypad_dt_gpio_free(keypad); |
0fffed27 JS |
538 | |
539 | iounmap(keypad->base); | |
540 | kfree(keypad); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
48c98b1b MB |
545 | #ifdef CONFIG_PM_RUNTIME |
546 | static int samsung_keypad_runtime_suspend(struct device *dev) | |
547 | { | |
548 | struct platform_device *pdev = to_platform_device(dev); | |
549 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
550 | unsigned int val; | |
551 | int error; | |
552 | ||
553 | if (keypad->stopped) | |
554 | return 0; | |
555 | ||
556 | /* This may fail on some SoCs due to lack of controller support */ | |
557 | error = enable_irq_wake(keypad->irq); | |
558 | if (!error) | |
559 | keypad->wake_enabled = true; | |
560 | ||
561 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
562 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; | |
563 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
564 | ||
565 | clk_disable(keypad->clk); | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
570 | static int samsung_keypad_runtime_resume(struct device *dev) | |
571 | { | |
572 | struct platform_device *pdev = to_platform_device(dev); | |
573 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
574 | unsigned int val; | |
575 | ||
576 | if (keypad->stopped) | |
577 | return 0; | |
578 | ||
579 | clk_enable(keypad->clk); | |
580 | ||
581 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
582 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; | |
583 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
584 | ||
585 | if (keypad->wake_enabled) | |
586 | disable_irq_wake(keypad->irq); | |
587 | ||
588 | return 0; | |
589 | } | |
590 | #endif | |
591 | ||
400bf299 | 592 | #ifdef CONFIG_PM_SLEEP |
0fffed27 JS |
593 | static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad, |
594 | bool enable) | |
595 | { | |
0fffed27 JS |
596 | unsigned int val; |
597 | ||
598 | clk_enable(keypad->clk); | |
599 | ||
600 | val = readl(keypad->base + SAMSUNG_KEYIFCON); | |
601 | if (enable) { | |
602 | val |= SAMSUNG_KEYIFCON_WAKEUPEN; | |
48c98b1b | 603 | if (device_may_wakeup(&keypad->pdev->dev)) |
0fffed27 JS |
604 | enable_irq_wake(keypad->irq); |
605 | } else { | |
606 | val &= ~SAMSUNG_KEYIFCON_WAKEUPEN; | |
48c98b1b | 607 | if (device_may_wakeup(&keypad->pdev->dev)) |
0fffed27 JS |
608 | disable_irq_wake(keypad->irq); |
609 | } | |
610 | writel(val, keypad->base + SAMSUNG_KEYIFCON); | |
611 | ||
612 | clk_disable(keypad->clk); | |
613 | } | |
614 | ||
615 | static int samsung_keypad_suspend(struct device *dev) | |
616 | { | |
617 | struct platform_device *pdev = to_platform_device(dev); | |
618 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
619 | struct input_dev *input_dev = keypad->input_dev; | |
620 | ||
621 | mutex_lock(&input_dev->mutex); | |
622 | ||
623 | if (input_dev->users) | |
624 | samsung_keypad_stop(keypad); | |
625 | ||
626 | samsung_keypad_toggle_wakeup(keypad, true); | |
627 | ||
628 | mutex_unlock(&input_dev->mutex); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static int samsung_keypad_resume(struct device *dev) | |
634 | { | |
635 | struct platform_device *pdev = to_platform_device(dev); | |
636 | struct samsung_keypad *keypad = platform_get_drvdata(pdev); | |
637 | struct input_dev *input_dev = keypad->input_dev; | |
638 | ||
639 | mutex_lock(&input_dev->mutex); | |
640 | ||
641 | samsung_keypad_toggle_wakeup(keypad, false); | |
642 | ||
643 | if (input_dev->users) | |
644 | samsung_keypad_start(keypad); | |
645 | ||
646 | mutex_unlock(&input_dev->mutex); | |
647 | ||
648 | return 0; | |
649 | } | |
0fffed27 JS |
650 | #endif |
651 | ||
48c98b1b MB |
652 | static const struct dev_pm_ops samsung_keypad_pm_ops = { |
653 | SET_SYSTEM_SLEEP_PM_OPS(samsung_keypad_suspend, samsung_keypad_resume) | |
654 | SET_RUNTIME_PM_OPS(samsung_keypad_runtime_suspend, | |
655 | samsung_keypad_runtime_resume, NULL) | |
656 | }; | |
400bf299 | 657 | |
b3d6ac3e TA |
658 | #ifdef CONFIG_OF |
659 | static const struct of_device_id samsung_keypad_dt_match[] = { | |
660 | { .compatible = "samsung,s3c6410-keypad" }, | |
661 | { .compatible = "samsung,s5pv210-keypad" }, | |
662 | {}, | |
663 | }; | |
664 | MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match); | |
665 | #else | |
666 | #define samsung_keypad_dt_match NULL | |
667 | #endif | |
668 | ||
0fffed27 JS |
669 | static struct platform_device_id samsung_keypad_driver_ids[] = { |
670 | { | |
671 | .name = "samsung-keypad", | |
672 | .driver_data = KEYPAD_TYPE_SAMSUNG, | |
673 | }, { | |
674 | .name = "s5pv210-keypad", | |
675 | .driver_data = KEYPAD_TYPE_S5PV210, | |
676 | }, | |
677 | { }, | |
678 | }; | |
679 | MODULE_DEVICE_TABLE(platform, samsung_keypad_driver_ids); | |
680 | ||
681 | static struct platform_driver samsung_keypad_driver = { | |
682 | .probe = samsung_keypad_probe, | |
683 | .remove = __devexit_p(samsung_keypad_remove), | |
684 | .driver = { | |
685 | .name = "samsung-keypad", | |
686 | .owner = THIS_MODULE, | |
b3d6ac3e | 687 | .of_match_table = samsung_keypad_dt_match, |
0fffed27 | 688 | .pm = &samsung_keypad_pm_ops, |
0fffed27 JS |
689 | }, |
690 | .id_table = samsung_keypad_driver_ids, | |
691 | }; | |
5146c84f | 692 | module_platform_driver(samsung_keypad_driver); |
0fffed27 JS |
693 | |
694 | MODULE_DESCRIPTION("Samsung keypad driver"); | |
695 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
696 | MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); | |
697 | MODULE_LICENSE("GPL"); |