3  * Samsung keypad driver
23 #include <linux/input/samsung-keypad.h>
79 static void samsung_keypad_scan(struct samsung_keypad *keypad,  in samsung_keypad_scan()  argument
85 	for (col = 0; col < keypad->cols; col++) {  in samsung_keypad_scan()
86 		if (keypad->type == KEYPAD_TYPE_S5PV210) {  in samsung_keypad_scan()
94 		writel(val, keypad->base + SAMSUNG_KEYIFCOL);  in samsung_keypad_scan()
97 		val = readl(keypad->base + SAMSUNG_KEYIFROW);  in samsung_keypad_scan()
98 		row_state[col] = ~val & ((1 << keypad->rows) - 1);  in samsung_keypad_scan()
102 	writel(0, keypad->base + SAMSUNG_KEYIFCOL);  in samsung_keypad_scan()
105 static bool samsung_keypad_report(struct samsung_keypad *keypad,  in samsung_keypad_report()  argument
108 	struct input_dev *input_dev = keypad->input_dev;  in samsung_keypad_report()
115 	for (col = 0; col < keypad->cols; col++) {  in samsung_keypad_report()
116 		changed = row_state[col] ^ keypad->row_state[col];  in samsung_keypad_report()
121 		for (row = 0; row < keypad->rows; row++) {  in samsung_keypad_report()
127 			dev_dbg(&keypad->input_dev->dev,  in samsung_keypad_report()
131 			val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);  in samsung_keypad_report()
135 					keypad->keycodes[val], pressed);  in samsung_keypad_report()
137 		input_sync(keypad->input_dev);  in samsung_keypad_report()
140 	memcpy(keypad->row_state, row_state, sizeof(keypad->row_state));  in samsung_keypad_report()
147 	struct samsung_keypad *keypad = dev_id;  in samsung_keypad_irq()  local
151 	pm_runtime_get_sync(&keypad->pdev->dev);  in samsung_keypad_irq()
154 		readl(keypad->base + SAMSUNG_KEYIFSTSCLR);  in samsung_keypad_irq()
156 		writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);  in samsung_keypad_irq()
158 		samsung_keypad_scan(keypad, row_state);  in samsung_keypad_irq()
160 		key_down = samsung_keypad_report(keypad, row_state);  in samsung_keypad_irq()
162 			wait_event_timeout(keypad->wait, keypad->stopped,  in samsung_keypad_irq()
165 	} while (key_down && !keypad->stopped);  in samsung_keypad_irq()
167 	pm_runtime_put(&keypad->pdev->dev);  in samsung_keypad_irq()
172 static void samsung_keypad_start(struct samsung_keypad *keypad)  in samsung_keypad_start()  argument
176 	pm_runtime_get_sync(&keypad->pdev->dev);  in samsung_keypad_start()
179 	keypad->stopped = false;  in samsung_keypad_start()
181 	clk_enable(keypad->clk);  in samsung_keypad_start()
184 	val = readl(keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_start()
186 	writel(val, keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_start()
189 	writel(0, keypad->base + SAMSUNG_KEYIFCOL);  in samsung_keypad_start()
191 	pm_runtime_put(&keypad->pdev->dev);  in samsung_keypad_start()
194 static void samsung_keypad_stop(struct samsung_keypad *keypad)  in samsung_keypad_stop()  argument
198 	pm_runtime_get_sync(&keypad->pdev->dev);  in samsung_keypad_stop()
201 	keypad->stopped = true;  in samsung_keypad_stop()
202 	wake_up(&keypad->wait);  in samsung_keypad_stop()
203 	disable_irq(keypad->irq);  in samsung_keypad_stop()
206 	writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);  in samsung_keypad_stop()
209 	val = readl(keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_stop()
211 	writel(val, keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_stop()
213 	clk_disable(keypad->clk);  in samsung_keypad_stop()
219 	enable_irq(keypad->irq);  in samsung_keypad_stop()
221 	pm_runtime_put(&keypad->pdev->dev);  in samsung_keypad_stop()
226 	struct samsung_keypad *keypad = input_get_drvdata(input_dev);  in samsung_keypad_open()  local
228 	samsung_keypad_start(keypad);  in samsung_keypad_open()
235 	struct samsung_keypad *keypad = input_get_drvdata(input_dev);  in samsung_keypad_close()  local
237 	samsung_keypad_stop(keypad);  in samsung_keypad_close()
261 	of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows);  in samsung_keypad_parse_dt()
262 	of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols);  in samsung_keypad_parse_dt()
264 		dev_err(dev, "number of keypad rows/columns not specified\n");  in samsung_keypad_parse_dt()
288 		of_property_read_u32(key_np, "keypad,row", &row);  in samsung_keypad_parse_dt()
289 		of_property_read_u32(key_np, "keypad,column", &col);  in samsung_keypad_parse_dt()
317 	struct samsung_keypad *keypad;  in samsung_keypad_probe()  local
348 	keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);  in samsung_keypad_probe()
350 	keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad) + keymap_size,  in samsung_keypad_probe()
353 	if (!keypad || !input_dev)  in samsung_keypad_probe()
360 	keypad->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));  in samsung_keypad_probe()
361 	if (!keypad->base)  in samsung_keypad_probe()
364 	keypad->clk = devm_clk_get(&pdev->dev, "keypad");  in samsung_keypad_probe()
365 	if (IS_ERR(keypad->clk)) {  in samsung_keypad_probe()
366 		dev_err(&pdev->dev, "failed to get keypad clk\n");  in samsung_keypad_probe()
367 		return PTR_ERR(keypad->clk);  in samsung_keypad_probe()
370 	error = clk_prepare(keypad->clk);  in samsung_keypad_probe()
372 		dev_err(&pdev->dev, "keypad clock prepare failed\n");  in samsung_keypad_probe()
376 	keypad->input_dev = input_dev;  in samsung_keypad_probe()
377 	keypad->pdev = pdev;  in samsung_keypad_probe()
378 	keypad->row_shift = row_shift;  in samsung_keypad_probe()
379 	keypad->rows = pdata->rows;  in samsung_keypad_probe()
380 	keypad->cols = pdata->cols;  in samsung_keypad_probe()
381 	keypad->stopped = true;  in samsung_keypad_probe()
382 	init_waitqueue_head(&keypad->wait);  in samsung_keypad_probe()
385 		keypad->type = of_device_is_compatible(pdev->dev.of_node,  in samsung_keypad_probe()
386 					"samsung,s5pv210-keypad");  in samsung_keypad_probe()
388 		keypad->type = platform_get_device_id(pdev)->driver_data;  in samsung_keypad_probe()
399 					   keypad->keycodes, input_dev);  in samsung_keypad_probe()
409 	input_set_drvdata(input_dev, keypad);  in samsung_keypad_probe()
411 	keypad->irq = platform_get_irq(pdev, 0);  in samsung_keypad_probe()
412 	if (keypad->irq < 0) {  in samsung_keypad_probe()
413 		error = keypad->irq;  in samsung_keypad_probe()
417 	error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL,  in samsung_keypad_probe()
419 					  dev_name(&pdev->dev), keypad);  in samsung_keypad_probe()
421 		dev_err(&pdev->dev, "failed to register keypad interrupt\n");  in samsung_keypad_probe()
426 	platform_set_drvdata(pdev, keypad);  in samsung_keypad_probe()
429 	error = input_register_device(keypad->input_dev);  in samsung_keypad_probe()
443 	clk_unprepare(keypad->clk);  in samsung_keypad_probe()
449 	struct samsung_keypad *keypad = platform_get_drvdata(pdev);  in samsung_keypad_remove()  local
453 	input_unregister_device(keypad->input_dev);  in samsung_keypad_remove()
455 	clk_unprepare(keypad->clk);  in samsung_keypad_remove()
463 	struct samsung_keypad *keypad = platform_get_drvdata(pdev);  in samsung_keypad_runtime_suspend()  local
467 	if (keypad->stopped)  in samsung_keypad_runtime_suspend()
471 	error = enable_irq_wake(keypad->irq);  in samsung_keypad_runtime_suspend()
473 		keypad->wake_enabled = true;  in samsung_keypad_runtime_suspend()
475 	val = readl(keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_runtime_suspend()
477 	writel(val, keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_runtime_suspend()
479 	clk_disable(keypad->clk);  in samsung_keypad_runtime_suspend()
487 	struct samsung_keypad *keypad = platform_get_drvdata(pdev);  in samsung_keypad_runtime_resume()  local
490 	if (keypad->stopped)  in samsung_keypad_runtime_resume()
493 	clk_enable(keypad->clk);  in samsung_keypad_runtime_resume()
495 	val = readl(keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_runtime_resume()
497 	writel(val, keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_runtime_resume()
499 	if (keypad->wake_enabled)  in samsung_keypad_runtime_resume()
500 		disable_irq_wake(keypad->irq);  in samsung_keypad_runtime_resume()
505 static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,  in samsung_keypad_toggle_wakeup()  argument
510 	clk_enable(keypad->clk);  in samsung_keypad_toggle_wakeup()
512 	val = readl(keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_toggle_wakeup()
515 		if (device_may_wakeup(&keypad->pdev->dev))  in samsung_keypad_toggle_wakeup()
516 			enable_irq_wake(keypad->irq);  in samsung_keypad_toggle_wakeup()
519 		if (device_may_wakeup(&keypad->pdev->dev))  in samsung_keypad_toggle_wakeup()
520 			disable_irq_wake(keypad->irq);  in samsung_keypad_toggle_wakeup()
522 	writel(val, keypad->base + SAMSUNG_KEYIFCON);  in samsung_keypad_toggle_wakeup()
524 	clk_disable(keypad->clk);  in samsung_keypad_toggle_wakeup()
530 	struct samsung_keypad *keypad = platform_get_drvdata(pdev);  in samsung_keypad_suspend()  local
531 	struct input_dev *input_dev = keypad->input_dev;  in samsung_keypad_suspend()
536 		samsung_keypad_stop(keypad);  in samsung_keypad_suspend()
538 	samsung_keypad_toggle_wakeup(keypad, true);  in samsung_keypad_suspend()
548 	struct samsung_keypad *keypad = platform_get_drvdata(pdev);  in samsung_keypad_resume()  local
549 	struct input_dev *input_dev = keypad->input_dev;  in samsung_keypad_resume()
553 	samsung_keypad_toggle_wakeup(keypad, false);  in samsung_keypad_resume()
556 		samsung_keypad_start(keypad);  in samsung_keypad_resume()
571 	{ .compatible = "samsung,s3c6410-keypad" },
572 	{ .compatible = "samsung,s5pv210-keypad" },
580 		.name		= "samsung-keypad",
583 		.name		= "s5pv210-keypad",
594 		.name	= "samsung-keypad",
602 MODULE_DESCRIPTION("Samsung keypad driver");