1 // SPDX-License-Identifier: GPL-2.0+
3 // extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
9 #include <linux/devm-helpers.h>
15 #include <linux/mfd/max14577.h>
16 #include <linux/mfd/max14577-private.h>
17 #include <linux/extcon-provider.h>
47 	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
48 	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
49 	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
50 	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
51 	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
52 	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
53 	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
54 	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
58 	{ MAX14577_IRQ_INT1_ADC,	"muic-ADC" },
59 	{ MAX14577_IRQ_INT1_ADCLOW,	"muic-ADCLOW" },
60 	{ MAX14577_IRQ_INT1_ADCERR,	"muic-ADCError" },
61 	{ MAX77836_IRQ_INT1_ADC1K,	"muic-ADC1K" },
62 	{ MAX14577_IRQ_INT2_CHGTYP,	"muic-CHGTYP" },
63 	{ MAX14577_IRQ_INT2_CHGDETRUN,	"muic-CHGDETRUN" },
64 	{ MAX14577_IRQ_INT2_DCDTMR,	"muic-DCDTMR" },
65 	{ MAX14577_IRQ_INT2_DBCHG,	"muic-DBCHG" },
66 	{ MAX14577_IRQ_INT2_VBVOLT,	"muic-VBVOLT" },
67 	{ MAX77836_IRQ_INT2_VIDRM,	"muic-VIDRM" },
72 	struct max14577 *max14577;  member
154  * max14577_muic_set_debounce_time - Set the debounce time of ADC
155  * @info: the instance including private data of max14577 MUIC
168 		ret = max14577_update_reg(info->max14577->regmap,  in max14577_muic_set_debounce_time()
173 			dev_err(info->dev, "failed to set ADC debounce time\n");  in max14577_muic_set_debounce_time()
178 		dev_err(info->dev, "invalid ADC debounce time\n");  in max14577_muic_set_debounce_time()
179 		return -EINVAL;  in max14577_muic_set_debounce_time()
186  * max14577_muic_set_path - Set hardware line according to attached cable
187  * @info: the instance including private data of max14577 MUIC
191  * The max14577 MUIC device share outside H/W line among a varity of cables
202 	ret = max14577_update_reg(info->max14577->regmap,  in max14577_muic_set_path()
206 		dev_err(info->dev, "failed to update MUIC register\n");  in max14577_muic_set_path()
215 	ret = max14577_update_reg(info->max14577->regmap,  in max14577_muic_set_path()
219 		dev_err(info->dev, "failed to update MUIC register\n");  in max14577_muic_set_path()
228 	ret = max14577_update_reg(info->max14577->regmap,  in max14577_muic_set_path()
232 		dev_err(info->dev, "failed to update MUIC register\n");  in max14577_muic_set_path()
236 	dev_dbg(info->dev,  in max14577_muic_set_path()
244  * max14577_muic_get_cable_type - Return cable type and check cable state
245  * @info: the instance including private data of max14577 MUIC
251  *	- max14577_CABLE_GROUP_ADC
252  *	- max14577_CABLE_GROUP_CHG
267 		adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;  in max14577_muic_get_cable_type()
272 		 * (info->prev_cable_type) for handling cable when cable is  in max14577_muic_get_cable_type()
278 			cable_type = info->prev_cable_type;  in max14577_muic_get_cable_type()
279 			info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;  in max14577_muic_get_cable_type()
283 			cable_type = info->prev_cable_type = adc;  in max14577_muic_get_cable_type()
288 		 * Read charger type to check cable type and decide cable state  in max14577_muic_get_cable_type()
289 		 * according to type of charger cable.  in max14577_muic_get_cable_type()
291 		chg_type = info->status[MAX14577_MUIC_STATUS2] &  in max14577_muic_get_cable_type()
298 			cable_type = info->prev_chg_type;  in max14577_muic_get_cable_type()
299 			info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;  in max14577_muic_get_cable_type()
305 			 * type(info->prev_chg_type) for handling cable when  in max14577_muic_get_cable_type()
306 			 * charger cable is detached.  in max14577_muic_get_cable_type()
308 			cable_type = info->prev_chg_type = chg_type;  in max14577_muic_get_cable_type()
313 		dev_err(info->dev, "Unknown cable group (%d)\n", group);  in max14577_muic_get_cable_type()
314 		cable_type = -EINVAL;  in max14577_muic_get_cable_type()
327 	dev_dbg(info->dev,  in max14577_muic_jig_handler()
342 		dev_err(info->dev, "failed to detect %s jig cable\n",  in max14577_muic_jig_handler()
344 		return -EINVAL;  in max14577_muic_jig_handler()
351 	extcon_set_state_sync(info->edev, EXTCON_JIG, attached);  in max14577_muic_jig_handler()
366 	dev_dbg(info->dev,  in max14577_muic_adc_handler()
369 		info->prev_cable_type);  in max14577_muic_adc_handler()
413 		dev_info(info->dev,  in max14577_muic_adc_handler()
416 		return -EAGAIN;  in max14577_muic_adc_handler()
418 		dev_err(info->dev,  in max14577_muic_adc_handler()
421 		return -EINVAL;  in max14577_muic_adc_handler()
436 	dev_dbg(info->dev,  in max14577_muic_chg_handler()
439 			chg_type, info->prev_chg_type);  in max14577_muic_chg_handler()
444 		ret = max14577_muic_set_path(info, info->path_usb, attached);  in max14577_muic_chg_handler()
448 		extcon_set_state_sync(info->edev, EXTCON_USB, attached);  in max14577_muic_chg_handler()
449 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,  in max14577_muic_chg_handler()
453 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,  in max14577_muic_chg_handler()
457 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,  in max14577_muic_chg_handler()
461 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,  in max14577_muic_chg_handler()
465 		extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,  in max14577_muic_chg_handler()
472 		dev_err(info->dev,  in max14577_muic_chg_handler()
475 		return -EINVAL;  in max14577_muic_chg_handler()
487 	if (!info->edev)  in max14577_muic_irq_work()
490 	mutex_lock(&info->mutex);  in max14577_muic_irq_work()
492 	ret = max14577_bulk_read(info->max14577->regmap,  in max14577_muic_irq_work()
493 			MAX14577_MUIC_REG_STATUS1, info->status, 2);  in max14577_muic_irq_work()
495 		dev_err(info->dev, "failed to read MUIC register\n");  in max14577_muic_irq_work()
496 		mutex_unlock(&info->mutex);  in max14577_muic_irq_work()
500 	if (info->irq_adc) {  in max14577_muic_irq_work()
502 		info->irq_adc = false;  in max14577_muic_irq_work()
504 	if (info->irq_chg) {  in max14577_muic_irq_work()
506 		info->irq_chg = false;  in max14577_muic_irq_work()
510 		dev_err(info->dev, "failed to handle MUIC interrupt\n");  in max14577_muic_irq_work()
512 	mutex_unlock(&info->mutex);  in max14577_muic_irq_work()
527 		 * type of charger accessory.  in max14577_parse_irq()
529 		info->irq_adc = true;  in max14577_parse_irq()
536 		/* Handle charger accessory */  in max14577_parse_irq()
537 		info->irq_chg = true;  in max14577_parse_irq()
550 	/* First check common max14577 interrupts */  in max77836_parse_irq()
556 		info->irq_adc = true;  in max77836_parse_irq()
559 		/* Handle charger accessory */  in max77836_parse_irq()
560 		info->irq_chg = true;  in max77836_parse_irq()
570 	int i, irq_type = -1;  in max14577_muic_irq_handler()
574 	 * We may be called multiple times for different nested IRQ-s.  in max14577_muic_irq_handler()
576 	 * However we only need to know whether it was ADC, charger  in max14577_muic_irq_handler()
579 	for (i = 0; i < info->muic_irqs_num; i++)  in max14577_muic_irq_handler()
580 		if (irq == info->muic_irqs[i].virq)  in max14577_muic_irq_handler()
581 			irq_type = info->muic_irqs[i].irq;  in max14577_muic_irq_handler()
583 	switch (info->max14577->dev_type) {  in max14577_muic_irq_handler()
594 		dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",  in max14577_muic_irq_handler()
598 	schedule_work(&info->irq_work);  in max14577_muic_irq_handler()
610 	mutex_lock(&info->mutex);  in max14577_muic_detect_accessory()
613 	ret = max14577_bulk_read(info->max14577->regmap,  in max14577_muic_detect_accessory()
614 			MAX14577_MUIC_REG_STATUS1, info->status, 2);  in max14577_muic_detect_accessory()
616 		dev_err(info->dev, "failed to read MUIC register\n");  in max14577_muic_detect_accessory()
617 		mutex_unlock(&info->mutex);  in max14577_muic_detect_accessory()
626 			dev_err(info->dev, "Cannot detect accessory\n");  in max14577_muic_detect_accessory()
627 			mutex_unlock(&info->mutex);  in max14577_muic_detect_accessory()
637 			dev_err(info->dev, "Cannot detect charger accessory\n");  in max14577_muic_detect_accessory()
638 			mutex_unlock(&info->mutex);  in max14577_muic_detect_accessory()
643 	mutex_unlock(&info->mutex);  in max14577_muic_detect_accessory()
658 	struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);  in max14577_muic_probe()  local
667 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);  in max14577_muic_probe()
669 		return -ENOMEM;  in max14577_muic_probe()
671 	info->dev = &pdev->dev;  in max14577_muic_probe()
672 	info->max14577 = max14577;  in max14577_muic_probe()
675 	mutex_init(&info->mutex);  in max14577_muic_probe()
677 	ret = devm_work_autocancel(&pdev->dev, &info->irq_work,  in max14577_muic_probe()
682 	switch (max14577->dev_type) {  in max14577_muic_probe()
684 		info->muic_irqs = max77836_muic_irqs;  in max14577_muic_probe()
685 		info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);  in max14577_muic_probe()
689 		info->muic_irqs = max14577_muic_irqs;  in max14577_muic_probe()
690 		info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);  in max14577_muic_probe()
693 	/* Support irq domain for max14577 MUIC device */  in max14577_muic_probe()
694 	for (i = 0; i < info->muic_irqs_num; i++) {  in max14577_muic_probe()
695 		struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];  in max14577_muic_probe()
698 		virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);  in max14577_muic_probe()
700 			return -EINVAL;  in max14577_muic_probe()
701 		muic_irq->virq = virq;  in max14577_muic_probe()
703 		ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,  in max14577_muic_probe()
706 				muic_irq->name, info);  in max14577_muic_probe()
708 			dev_err(&pdev->dev,  in max14577_muic_probe()
710 				muic_irq->irq, ret);  in max14577_muic_probe()
716 	info->edev = devm_extcon_dev_allocate(&pdev->dev,  in max14577_muic_probe()
718 	if (IS_ERR(info->edev)) {  in max14577_muic_probe()
719 		dev_err(&pdev->dev, "failed to allocate memory for extcon\n");  in max14577_muic_probe()
720 		return PTR_ERR(info->edev);  in max14577_muic_probe()
723 	ret = devm_extcon_dev_register(&pdev->dev, info->edev);  in max14577_muic_probe()
725 		dev_err(&pdev->dev, "failed to register extcon device\n");  in max14577_muic_probe()
730 	info->path_usb = CTRL1_SW_USB;  in max14577_muic_probe()
731 	info->path_uart = CTRL1_SW_UART;  in max14577_muic_probe()
735 	ret = max14577_bulk_read(info->max14577->regmap,  in max14577_muic_probe()
736 			MAX14577_MUIC_REG_STATUS1, info->status, 2);  in max14577_muic_probe()
738 		dev_err(info->dev, "Cannot read STATUS registers\n");  in max14577_muic_probe()
744 		max14577_muic_set_path(info, info->path_uart, true);  in max14577_muic_probe()
747 	ret = max14577_read_reg(info->max14577->regmap,  in max14577_muic_probe()
750 		dev_err(&pdev->dev, "failed to read revision number\n");  in max14577_muic_probe()
753 	dev_info(info->dev, "device ID : 0x%x\n", id);  in max14577_muic_probe()
761 	 * - Use delayed workqueue to detect cable state and then  in max14577_muic_probe()
766 	INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);  in max14577_muic_probe()
767 	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,  in max14577_muic_probe()
774 	{ "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
775 	{ "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
781 	{ .compatible = "maxim,max14577-muic",
783 	{ .compatible = "maxim,max77836-muic",
791 		.name	= "max14577-muic",
803 MODULE_ALIAS("platform:extcon-max14577");