1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Copyright (c) 2009-2011, NVIDIA Corporation.
80 	unsigned char num;  member
156 			val = readl(kbc->mmio + KBC_KP_ENT0_0 + i);  in tegra_kbc_report_keys()
165 			keycodes[num_down] = kbc->keycode[scancode];  in tegra_kbc_report_keys()
167 			if ((keycodes[num_down] == KEY_FN) && kbc->use_fn_map)  in tegra_kbc_report_keys()
178 	 * Ghosting occurs if there are 3 keys such that -  in tegra_kbc_report_keys()
182 	if (kbc->use_ghost_filter && num_down >= 3) {  in tegra_kbc_report_keys()
190 			 * and the other is in the same column as the i-th key.  in tegra_kbc_report_keys()
210 			scancodes[i] += kbc->max_keys;  in tegra_kbc_report_keys()
211 			keycodes[i] = kbc->keycode[scancodes[i]];  in tegra_kbc_report_keys()
219 	tegra_kbc_report_released_keys(kbc->idev,  in tegra_kbc_report_keys()
220 				       kbc->current_keys, kbc->num_pressed_keys,  in tegra_kbc_report_keys()
222 	tegra_kbc_report_pressed_keys(kbc->idev, scancodes, keycodes, num_down);  in tegra_kbc_report_keys()
223 	input_sync(kbc->idev);  in tegra_kbc_report_keys()
225 	memcpy(kbc->current_keys, keycodes, sizeof(kbc->current_keys));  in tegra_kbc_report_keys()
226 	kbc->num_pressed_keys = num_down;  in tegra_kbc_report_keys()
233 	val = readl(kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_set_fifo_interrupt()
238 	writel(val, kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_set_fifo_interrupt()
248 	spin_lock_irqsave(&kbc->lock, flags);  in tegra_kbc_keypress_timer()
250 	val = (readl(kbc->mmio + KBC_INT_0) >> 4) & 0xf;  in tegra_kbc_keypress_timer()
260 		dly = (val == 1) ? kbc->repoll_dly : 1;  in tegra_kbc_keypress_timer()
261 		mod_timer(&kbc->timer, jiffies + msecs_to_jiffies(dly));  in tegra_kbc_keypress_timer()
264 		for (i = 0; i < kbc->num_pressed_keys; i++)  in tegra_kbc_keypress_timer()
265 			input_report_key(kbc->idev, kbc->current_keys[i], 0);  in tegra_kbc_keypress_timer()
266 		input_sync(kbc->idev);  in tegra_kbc_keypress_timer()
268 		kbc->num_pressed_keys = 0;  in tegra_kbc_keypress_timer()
274 	spin_unlock_irqrestore(&kbc->lock, flags);  in tegra_kbc_keypress_timer()
283 	spin_lock_irqsave(&kbc->lock, flags);  in tegra_kbc_isr()
289 	val = readl(kbc->mmio + KBC_INT_0);  in tegra_kbc_isr()
290 	writel(val, kbc->mmio + KBC_INT_0);  in tegra_kbc_isr()
298 		mod_timer(&kbc->timer, jiffies + kbc->cp_dly_jiffies);  in tegra_kbc_isr()
301 		kbc->keypress_caused_wake = true;  in tegra_kbc_isr()
304 	spin_unlock_irqrestore(&kbc->lock, flags);  in tegra_kbc_isr()
315 	rst_val = (filter && !kbc->wakeup) ? ~0 : 0;  in tegra_kbc_setup_wakekeys()
317 	for (i = 0; i < kbc->hw_support->max_rows; i++)  in tegra_kbc_setup_wakekeys()
318 		writel(rst_val, kbc->mmio + KBC_ROW0_MASK_0 + i * 4);  in tegra_kbc_setup_wakekeys()
332 		u32 row_cfg = readl(kbc->mmio + r_offs);  in tegra_kbc_config_pins()
333 		u32 col_cfg = readl(kbc->mmio + c_offs);  in tegra_kbc_config_pins()
338 		switch (kbc->pin_cfg[i].type) {  in tegra_kbc_config_pins()
340 			row_cfg |= ((kbc->pin_cfg[i].num << 1) | 1) << r_shft;  in tegra_kbc_config_pins()
344 			col_cfg |= ((kbc->pin_cfg[i].num << 1) | 1) << c_shft;  in tegra_kbc_config_pins()
351 		writel(row_cfg, kbc->mmio + r_offs);  in tegra_kbc_config_pins()
352 		writel(col_cfg, kbc->mmio + c_offs);  in tegra_kbc_config_pins()
362 	ret = clk_prepare_enable(kbc->clk);  in tegra_kbc_start()
367 	reset_control_assert(kbc->rst);  in tegra_kbc_start()
369 	reset_control_deassert(kbc->rst);  in tegra_kbc_start()
375 	writel(kbc->repeat_cnt, kbc->mmio + KBC_RPT_DLY_0);  in tegra_kbc_start()
378 	debounce_cnt = min(kbc->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);  in tegra_kbc_start()
383 	writel(val, kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_start()
389 	val = readl(kbc->mmio + KBC_INIT_DLY_0);  in tegra_kbc_start()
390 	kbc->cp_dly_jiffies = usecs_to_jiffies((val & 0xfffff) * 32);  in tegra_kbc_start()
392 	kbc->num_pressed_keys = 0;  in tegra_kbc_start()
399 		val = readl(kbc->mmio + KBC_INT_0);  in tegra_kbc_start()
404 		val = readl(kbc->mmio + KBC_KP_ENT0_0);  in tegra_kbc_start()
405 		val = readl(kbc->mmio + KBC_KP_ENT1_0);  in tegra_kbc_start()
407 	writel(0x7, kbc->mmio + KBC_INT_0);  in tegra_kbc_start()
409 	enable_irq(kbc->irq);  in tegra_kbc_start()
419 	spin_lock_irqsave(&kbc->lock, flags);  in tegra_kbc_stop()
420 	val = readl(kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_stop()
422 	writel(val, kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_stop()
423 	spin_unlock_irqrestore(&kbc->lock, flags);  in tegra_kbc_stop()
425 	disable_irq(kbc->irq);  in tegra_kbc_stop()
426 	del_timer_sync(&kbc->timer);  in tegra_kbc_stop()
428 	clk_disable_unprepare(kbc->clk);  in tegra_kbc_stop()
453 		const struct tegra_kbc_pin_cfg *pin_cfg = &kbc->pin_cfg[i];  in tegra_kbc_check_pin_cfg()
455 		switch (pin_cfg->type) {  in tegra_kbc_check_pin_cfg()
457 			if (pin_cfg->num >= kbc->hw_support->max_rows) {  in tegra_kbc_check_pin_cfg()
458 				dev_err(kbc->dev,  in tegra_kbc_check_pin_cfg()
460 					i, pin_cfg->num);  in tegra_kbc_check_pin_cfg()
467 			if (pin_cfg->num >= kbc->hw_support->max_columns) {  in tegra_kbc_check_pin_cfg()
468 				dev_err(kbc->dev,  in tegra_kbc_check_pin_cfg()
470 					i, pin_cfg->num);  in tegra_kbc_check_pin_cfg()
479 			dev_err(kbc->dev,  in tegra_kbc_check_pin_cfg()
481 				pin_cfg->type, pin_cfg->num);  in tegra_kbc_check_pin_cfg()
491 	struct device_node *np = kbc->dev->of_node;  in tegra_kbc_parse_dt()
501 	if (!of_property_read_u32(np, "nvidia,debounce-delay-ms", &prop))  in tegra_kbc_parse_dt()
502 		kbc->debounce_cnt = prop;  in tegra_kbc_parse_dt()
504 	if (!of_property_read_u32(np, "nvidia,repeat-delay-ms", &prop))  in tegra_kbc_parse_dt()
505 		kbc->repeat_cnt = prop;  in tegra_kbc_parse_dt()
507 	if (of_find_property(np, "nvidia,needs-ghost-filter", NULL))  in tegra_kbc_parse_dt()
508 		kbc->use_ghost_filter = true;  in tegra_kbc_parse_dt()
510 	if (of_property_read_bool(np, "wakeup-source") ||  in tegra_kbc_parse_dt()
511 	    of_property_read_bool(np, "nvidia,wakeup-source")) /* legacy */  in tegra_kbc_parse_dt()
512 		kbc->wakeup = true;  in tegra_kbc_parse_dt()
514 	if (!of_get_property(np, "nvidia,kbc-row-pins", &proplen)) {  in tegra_kbc_parse_dt()
515 		dev_err(kbc->dev, "property nvidia,kbc-row-pins not found\n");  in tegra_kbc_parse_dt()
516 		return -ENOENT;  in tegra_kbc_parse_dt()
520 	if (!of_get_property(np, "nvidia,kbc-col-pins", &proplen)) {  in tegra_kbc_parse_dt()
521 		dev_err(kbc->dev, "property nvidia,kbc-col-pins not found\n");  in tegra_kbc_parse_dt()
522 		return -ENOENT;  in tegra_kbc_parse_dt()
526 	if (num_rows > kbc->hw_support->max_rows) {  in tegra_kbc_parse_dt()
527 		dev_err(kbc->dev,  in tegra_kbc_parse_dt()
528 			"Number of rows is more than supported by hardware\n");  in tegra_kbc_parse_dt()
529 		return -EINVAL;  in tegra_kbc_parse_dt()
532 	if (num_cols > kbc->hw_support->max_columns) {  in tegra_kbc_parse_dt()
533 		dev_err(kbc->dev,  in tegra_kbc_parse_dt()
535 		return -EINVAL;  in tegra_kbc_parse_dt()
539 		dev_err(kbc->dev, "property linux,keymap not found\n");  in tegra_kbc_parse_dt()
540 		return -ENOENT;  in tegra_kbc_parse_dt()
544 		dev_err(kbc->dev,  in tegra_kbc_parse_dt()
545 			"keypad rows/columns not properly specified\n");  in tegra_kbc_parse_dt()
546 		return -EINVAL;  in tegra_kbc_parse_dt()
549 	/* Set all pins as non-configured */  in tegra_kbc_parse_dt()
550 	for (i = 0; i < kbc->num_rows_and_columns; i++)  in tegra_kbc_parse_dt()
551 		kbc->pin_cfg[i].type = PIN_CFG_IGNORE;  in tegra_kbc_parse_dt()
553 	ret = of_property_read_u32_array(np, "nvidia,kbc-row-pins",  in tegra_kbc_parse_dt()
556 		dev_err(kbc->dev, "Rows configurations are not proper\n");  in tegra_kbc_parse_dt()
557 		return -EINVAL;  in tegra_kbc_parse_dt()
560 	ret = of_property_read_u32_array(np, "nvidia,kbc-col-pins",  in tegra_kbc_parse_dt()
563 		dev_err(kbc->dev, "Cols configurations are not proper\n");  in tegra_kbc_parse_dt()
564 		return -EINVAL;  in tegra_kbc_parse_dt()
568 		kbc->pin_cfg[rows_cfg[i]].type = PIN_CFG_ROW;  in tegra_kbc_parse_dt()
569 		kbc->pin_cfg[rows_cfg[i]].num = i;  in tegra_kbc_parse_dt()
573 		kbc->pin_cfg[cols_cfg[i]].type = PIN_CFG_COL;  in tegra_kbc_parse_dt()
574 		kbc->pin_cfg[cols_cfg[i]].num = i;  in tegra_kbc_parse_dt()
591 	{ .compatible = "nvidia,tegra114-kbc", .data = &tegra11_kbc_hw_support},
592 	{ .compatible = "nvidia,tegra30-kbc", .data = &tegra20_kbc_hw_support},
593 	{ .compatible = "nvidia,tegra20-kbc", .data = &tegra20_kbc_hw_support},
609 	match = of_match_device(tegra_kbc_of_match, &pdev->dev);  in tegra_kbc_probe()
611 	kbc = devm_kzalloc(&pdev->dev, sizeof(*kbc), GFP_KERNEL);  in tegra_kbc_probe()
613 		dev_err(&pdev->dev, "failed to alloc memory for kbc\n");  in tegra_kbc_probe()
614 		return -ENOMEM;  in tegra_kbc_probe()
617 	kbc->dev = &pdev->dev;  in tegra_kbc_probe()
618 	kbc->hw_support = match->data;  in tegra_kbc_probe()
619 	kbc->max_keys = kbc->hw_support->max_rows *  in tegra_kbc_probe()
620 				kbc->hw_support->max_columns;  in tegra_kbc_probe()
621 	kbc->num_rows_and_columns = kbc->hw_support->max_rows +  in tegra_kbc_probe()
622 					kbc->hw_support->max_columns;  in tegra_kbc_probe()
623 	keymap_rows = kbc->max_keys;  in tegra_kbc_probe()
624 	spin_lock_init(&kbc->lock);  in tegra_kbc_probe()
631 		return -EINVAL;  in tegra_kbc_probe()
633 	kbc->irq = platform_get_irq(pdev, 0);  in tegra_kbc_probe()
634 	if (kbc->irq < 0)  in tegra_kbc_probe()
635 		return -ENXIO;  in tegra_kbc_probe()
637 	kbc->idev = devm_input_allocate_device(&pdev->dev);  in tegra_kbc_probe()
638 	if (!kbc->idev) {  in tegra_kbc_probe()
639 		dev_err(&pdev->dev, "failed to allocate input device\n");  in tegra_kbc_probe()
640 		return -ENOMEM;  in tegra_kbc_probe()
643 	timer_setup(&kbc->timer, tegra_kbc_keypress_timer, 0);  in tegra_kbc_probe()
646 	kbc->mmio = devm_ioremap_resource(&pdev->dev, res);  in tegra_kbc_probe()
647 	if (IS_ERR(kbc->mmio))  in tegra_kbc_probe()
648 		return PTR_ERR(kbc->mmio);  in tegra_kbc_probe()
650 	kbc->clk = devm_clk_get(&pdev->dev, NULL);  in tegra_kbc_probe()
651 	if (IS_ERR(kbc->clk)) {  in tegra_kbc_probe()
652 		dev_err(&pdev->dev, "failed to get keyboard clock\n");  in tegra_kbc_probe()
653 		return PTR_ERR(kbc->clk);  in tegra_kbc_probe()
656 	kbc->rst = devm_reset_control_get(&pdev->dev, "kbc");  in tegra_kbc_probe()
657 	if (IS_ERR(kbc->rst)) {  in tegra_kbc_probe()
658 		dev_err(&pdev->dev, "failed to get keyboard reset\n");  in tegra_kbc_probe()
659 		return PTR_ERR(kbc->rst);  in tegra_kbc_probe()
665 	 * the rows. There is an additional delay before the row scanning  in tegra_kbc_probe()
668 	debounce_cnt = min(kbc->debounce_cnt, KBC_MAX_DEBOUNCE_CNT);  in tegra_kbc_probe()
670 	kbc->repoll_dly = KBC_ROW_SCAN_DLY + scan_time_rows + kbc->repeat_cnt;  in tegra_kbc_probe()
671 	kbc->repoll_dly = DIV_ROUND_UP(kbc->repoll_dly, KBC_CYCLE_MS);  in tegra_kbc_probe()
673 	kbc->idev->name = pdev->name;  in tegra_kbc_probe()
674 	kbc->idev->id.bustype = BUS_HOST;  in tegra_kbc_probe()
675 	kbc->idev->dev.parent = &pdev->dev;  in tegra_kbc_probe()
676 	kbc->idev->open = tegra_kbc_open;  in tegra_kbc_probe()
677 	kbc->idev->close = tegra_kbc_close;  in tegra_kbc_probe()
679 	if (kbc->keymap_data && kbc->use_fn_map)  in tegra_kbc_probe()
682 	err = matrix_keypad_build_keymap(kbc->keymap_data, NULL,  in tegra_kbc_probe()
684 					 kbc->hw_support->max_columns,  in tegra_kbc_probe()
685 					 kbc->keycode, kbc->idev);  in tegra_kbc_probe()
687 		dev_err(&pdev->dev, "failed to setup keymap\n");  in tegra_kbc_probe()
691 	__set_bit(EV_REP, kbc->idev->evbit);  in tegra_kbc_probe()
692 	input_set_capability(kbc->idev, EV_MSC, MSC_SCAN);  in tegra_kbc_probe()
694 	input_set_drvdata(kbc->idev, kbc);  in tegra_kbc_probe()
696 	err = devm_request_irq(&pdev->dev, kbc->irq, tegra_kbc_isr,  in tegra_kbc_probe()
698 			       pdev->name, kbc);  in tegra_kbc_probe()
700 		dev_err(&pdev->dev, "failed to request keyboard IRQ\n");  in tegra_kbc_probe()
704 	err = input_register_device(kbc->idev);  in tegra_kbc_probe()
706 		dev_err(&pdev->dev, "failed to register input device\n");  in tegra_kbc_probe()
711 	device_init_wakeup(&pdev->dev, kbc->wakeup);  in tegra_kbc_probe()
721 	val = readl(kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_set_keypress_interrupt()
726 	writel(val, kbc->mmio + KBC_CONTROL_0);  in tegra_kbc_set_keypress_interrupt()
734 	mutex_lock(&kbc->idev->mutex);  in tegra_kbc_suspend()
735 	if (device_may_wakeup(&pdev->dev)) {  in tegra_kbc_suspend()
736 		disable_irq(kbc->irq);  in tegra_kbc_suspend()
737 		del_timer_sync(&kbc->timer);  in tegra_kbc_suspend()
741 		writel(0x7, kbc->mmio + KBC_INT_0);  in tegra_kbc_suspend()
746 		kbc->cp_to_wkup_dly = readl(kbc->mmio + KBC_TO_CNT_0);  in tegra_kbc_suspend()
747 		writel(0, kbc->mmio + KBC_TO_CNT_0);  in tegra_kbc_suspend()
752 		kbc->keypress_caused_wake = false;  in tegra_kbc_suspend()
755 		enable_irq(kbc->irq);  in tegra_kbc_suspend()
756 		enable_irq_wake(kbc->irq);  in tegra_kbc_suspend()
758 		if (input_device_enabled(kbc->idev))  in tegra_kbc_suspend()
761 	mutex_unlock(&kbc->idev->mutex);  in tegra_kbc_suspend()
772 	mutex_lock(&kbc->idev->mutex);  in tegra_kbc_resume()
773 	if (device_may_wakeup(&pdev->dev)) {  in tegra_kbc_resume()
774 		disable_irq_wake(kbc->irq);  in tegra_kbc_resume()
780 		writel(kbc->cp_to_wkup_dly, kbc->mmio + KBC_TO_CNT_0);  in tegra_kbc_resume()
784 		if (kbc->keypress_caused_wake && kbc->wakeup_key) {  in tegra_kbc_resume()
792 			input_report_key(kbc->idev, kbc->wakeup_key, 1);  in tegra_kbc_resume()
793 			input_sync(kbc->idev);  in tegra_kbc_resume()
794 			input_report_key(kbc->idev, kbc->wakeup_key, 0);  in tegra_kbc_resume()
795 			input_sync(kbc->idev);  in tegra_kbc_resume()
798 		if (input_device_enabled(kbc->idev))  in tegra_kbc_resume()
801 	mutex_unlock(&kbc->idev->mutex);  in tegra_kbc_resume()
812 		.name	= "tegra-kbc",
822 MODULE_ALIAS("platform:tegra-kbc");