1 // SPDX-License-Identifier: GPL-2.0-only
3  * axp288_charger.c - X-power AXP288 PMIC Charger driver
5  * Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
18 #include <linux/usb/otg.h>
134 	/* SDP/CDP/DCP USB charging cable notifications */
160 	else if (cc > info->max_cc)  in axp288_charger_set_cc()
161 		cc = info->max_cc;  in axp288_charger_set_cc()
163 	reg_val = (cc - CHRG_CCCV_CC_OFFSET) / CHRG_CCCV_CC_LSB_RES;  in axp288_charger_set_cc()
167 	ret = regmap_update_bits(info->regmap,  in axp288_charger_set_cc()
171 		info->cc = cc;  in axp288_charger_set_cc()
197 	ret = regmap_update_bits(info->regmap,  in axp288_charger_set_cv()
202 		info->cv = cv;  in axp288_charger_set_cv()
211 	val = info->backend_control;  in axp288_charger_get_vbus_inlmt()
262 	ret = regmap_update_bits(info->regmap, AXP20X_CHRG_BAK_CTRL,  in axp288_charger_set_vbus_inlmt()
265 		dev_err(&info->pdev->dev, "charger BAK control %d\n", ret);  in axp288_charger_set_vbus_inlmt()
276 		ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,  in axp288_charger_vbus_path_select()
279 		ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,  in axp288_charger_vbus_path_select()
283 		dev_err(&info->pdev->dev, "axp288 vbus path select %d\n", ret);  in axp288_charger_vbus_path_select()
294 		ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,  in axp288_charger_enable_charger()
297 		ret = regmap_update_bits(info->regmap, AXP20X_CHRG_CTRL1,  in axp288_charger_enable_charger()
300 		dev_err(&info->pdev->dev, "axp288 enable charger %d\n", ret);  in axp288_charger_enable_charger()
307 	if (!(info->input_status & PS_STAT_VBUS_PRESENT))  in axp288_get_charger_health()
310 	if (!(info->input_status & PS_STAT_VBUS_VALID))  in axp288_get_charger_health()
312 	else if (info->op_mode & CHRG_STAT_PMIC_OTP)  in axp288_get_charger_health()
314 	else if (info->op_mode & CHRG_STAT_BAT_SAFE_MODE)  in axp288_get_charger_health()
328 	mutex_lock(&info->lock);  in axp288_charger_usb_set_property()
331 		scaled_val = min(val->intval, info->max_cc);  in axp288_charger_usb_set_property()
335 			dev_warn(&info->pdev->dev, "set charge current failed\n");  in axp288_charger_usb_set_property()
340 		scaled_val = DIV_ROUND_CLOSEST(val->intval, 1000);  in axp288_charger_usb_set_property()
341 		scaled_val = min(scaled_val, info->max_cv);  in axp288_charger_usb_set_property()
344 			dev_warn(&info->pdev->dev, "set charge voltage failed\n");  in axp288_charger_usb_set_property()
349 		ret = axp288_charger_set_vbus_inlmt(info, val->intval);  in axp288_charger_usb_set_property()
351 			dev_warn(&info->pdev->dev, "set input current limit failed\n");  in axp288_charger_usb_set_property()
354 		info->valid = false;  in axp288_charger_usb_set_property()
357 		ret = -EINVAL;  in axp288_charger_usb_set_property()
361 	mutex_unlock(&info->lock);  in axp288_charger_usb_set_property()
369 	ret = regmap_read(info->regmap, reg, ret_val);  in axp288_charger_reg_readb()
371 		dev_err(&info->pdev->dev, "Error %d on reading value from register 0x%04x\n",  in axp288_charger_reg_readb()
383 	if (info->valid && time_before(jiffies, info->last_updated + AXP288_REG_UPDATE_INTERVAL))  in axp288_charger_usb_update_property()
386 	dev_dbg(&info->pdev->dev, "Charger updating register values...\n");  in axp288_charger_usb_update_property()
392 	ret = axp288_charger_reg_readb(info, AXP20X_PWR_INPUT_STATUS, &info->input_status);  in axp288_charger_usb_update_property()
396 	ret = axp288_charger_reg_readb(info, AXP20X_PWR_OP_MODE, &info->op_mode);  in axp288_charger_usb_update_property()
400 	ret = axp288_charger_reg_readb(info, AXP20X_CHRG_BAK_CTRL, &info->backend_control);  in axp288_charger_usb_update_property()
404 	info->last_updated = jiffies;  in axp288_charger_usb_update_property()
405 	info->valid = true;  in axp288_charger_usb_update_property()
418 	mutex_lock(&info->lock);  in axp288_charger_usb_get_property()
426 		if (info->otg.id_short) {  in axp288_charger_usb_get_property()
427 			val->intval = 0;  in axp288_charger_usb_get_property()
430 		val->intval = (info->input_status & PS_STAT_VBUS_PRESENT) ? 1 : 0;  in axp288_charger_usb_get_property()
434 		if (info->otg.id_short) {  in axp288_charger_usb_get_property()
435 			val->intval = 0;  in axp288_charger_usb_get_property()
438 		val->intval = (info->input_status & PS_STAT_VBUS_VALID) ? 1 : 0;  in axp288_charger_usb_get_property()
441 		val->intval = axp288_get_charger_health(info);  in axp288_charger_usb_get_property()
444 		val->intval = info->cc * 1000;  in axp288_charger_usb_get_property()
447 		val->intval = info->max_cc * 1000;  in axp288_charger_usb_get_property()
450 		val->intval = info->cv * 1000;  in axp288_charger_usb_get_property()
453 		val->intval = info->max_cv * 1000;  in axp288_charger_usb_get_property()
456 		val->intval = axp288_charger_get_vbus_inlmt(info);  in axp288_charger_usb_get_property()
459 		ret = -EINVAL;  in axp288_charger_usb_get_property()
463 	mutex_unlock(&info->lock);  in axp288_charger_usb_get_property()
513 		if (info->irq[i] == irq)  in axp288_charger_irq_thread_handler()
518 		dev_warn(&info->pdev->dev, "spurious interrupt!!\n");  in axp288_charger_irq_thread_handler()
524 		dev_dbg(&info->pdev->dev, "VBUS Over Voltage INTR\n");  in axp288_charger_irq_thread_handler()
527 		dev_dbg(&info->pdev->dev, "Charging Done INTR\n");  in axp288_charger_irq_thread_handler()
530 		dev_dbg(&info->pdev->dev, "Start Charging IRQ\n");  in axp288_charger_irq_thread_handler()
533 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
537 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
541 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
545 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
549 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
553 		dev_dbg(&info->pdev->dev,  in axp288_charger_irq_thread_handler()
557 		dev_warn(&info->pdev->dev, "Spurious Interrupt!!!\n");  in axp288_charger_irq_thread_handler()
560 	mutex_lock(&info->lock);  in axp288_charger_irq_thread_handler()
561 	info->valid = false;  in axp288_charger_irq_thread_handler()
562 	mutex_unlock(&info->lock);  in axp288_charger_irq_thread_handler()
563 	power_supply_changed(info->psy_usb);  in axp288_charger_irq_thread_handler()
570  * Bay Trail SoC    + AXP288 PMIC, Micro-USB, DMI_BOARD_NAME: "8021"
571  * Bay Trail SoC    + AXP288 PMIC, Type-C,    DMI_BOARD_NAME: "815D"
572  * Cherry Trail SoC + AXP288 PMIC, Type-C,    DMI_BOARD_NAME: "813E"
573  * Cherry Trail SoC + TI PMIC,     Type-C,    DMI_BOARD_NAME: "827C" or "82F4"
575  * The variants with the AXP288 + Type-C connector are all kinds of special:
577  * 1. They use a Type-C connector which the AXP288 does not support, so when
578  * using a Type-C charger it is not recognized. Unlike most AXP288 devices,
585  * 2. If no charger is connected the machine boots with the vbus-path disabled.
588  * an OTG host cable is inserted and the ID pin on the micro-B receptacle is
590  * which re-enables the vbus-path when the ID pin is pulled high when the
591  * OTG host cable is removed. The Type-C connector has no ID pin, there is
593  * end up not charging because the vbus-path is disabled, until we unplug
594  * the charger which automatically clears the vbus-path disable bit and then
595  * on the second plug-in of the adapter we start charging. To solve the not
596  * charging on first charger plugin we unconditionally enable the vbus-path at
602 			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
622 	struct extcon_dev *edev = info->cable.edev;  in axp288_charger_extcon_evt_worker()
625 	ret = regmap_read(info->regmap, AXP20X_PWR_INPUT_STATUS, &val);  in axp288_charger_extcon_evt_worker()
627 		dev_err(&info->pdev->dev, "Error reading status (%d)\n", ret);  in axp288_charger_extcon_evt_worker()
633 		dev_dbg(&info->pdev->dev, "USB charger disconnected\n");  in axp288_charger_extcon_evt_worker()
635 		mutex_lock(&info->lock);  in axp288_charger_extcon_evt_worker()
636 		info->valid = false;  in axp288_charger_extcon_evt_worker()
637 		mutex_unlock(&info->lock);  in axp288_charger_extcon_evt_worker()
638 		power_supply_changed(info->psy_usb);  in axp288_charger_extcon_evt_worker()
645 		dev_dbg(&info->pdev->dev, "HP X2 with Type-C, setting inlmt to 3A\n");  in axp288_charger_extcon_evt_worker()
648 		dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n");  in axp288_charger_extcon_evt_worker()
651 		dev_dbg(&info->pdev->dev, "USB CDP charger is connected\n");  in axp288_charger_extcon_evt_worker()
654 		dev_dbg(&info->pdev->dev, "USB DCP charger is connected\n");  in axp288_charger_extcon_evt_worker()
666 		dev_err(&info->pdev->dev,  in axp288_charger_extcon_evt_worker()
669 	mutex_lock(&info->lock);  in axp288_charger_extcon_evt_worker()
670 	info->valid = false;  in axp288_charger_extcon_evt_worker()
671 	mutex_unlock(&info->lock);  in axp288_charger_extcon_evt_worker()
672 	power_supply_changed(info->psy_usb);  in axp288_charger_extcon_evt_worker()
680 	schedule_work(&info->cable.work);  in axp288_charger_handle_cable_evt()
688 	struct extcon_dev *edev = info->otg.cable;  in axp288_charger_otg_evt_worker()
691 	dev_dbg(&info->pdev->dev, "external connector USB-Host is %s\n",  in axp288_charger_otg_evt_worker()
696 	 * in case usb host.  in axp288_charger_otg_evt_worker()
698 	info->otg.id_short = usb_host;  in axp288_charger_otg_evt_worker()
701 	ret = axp288_charger_vbus_path_select(info, !info->otg.id_short);  in axp288_charger_otg_evt_worker()
703 		dev_warn(&info->pdev->dev, "vbus path disable failed\n");  in axp288_charger_otg_evt_worker()
712 	schedule_work(&info->otg.work);  in axp288_charger_handle_otg_evt()
723 	ret = regmap_write(info->regmap, AXP20X_V_LTF_CHRG, CHRG_VLTFC_0C);  in charger_init_hw_regs()
725 		dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
730 	ret = regmap_write(info->regmap, AXP20X_V_HTF_CHRG, CHRG_VHTFC_45C);  in charger_init_hw_regs()
732 		dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
737 	/* Do not turn-off charger o/p after charge cycle ends */  in charger_init_hw_regs()
738 	ret = regmap_update_bits(info->regmap,  in charger_init_hw_regs()
742 		dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
748 	ret = regmap_update_bits(info->regmap,  in charger_init_hw_regs()
752 		dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
757 	/* Disable OCV-SOC curve calibration */  in charger_init_hw_regs()
758 	ret = regmap_update_bits(info->regmap,  in charger_init_hw_regs()
762 		dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
775 		ret = regmap_update_bits(info->regmap, AXP20X_VBUS_IPSOUT_MGMT,  in charger_init_hw_regs()
778 			dev_err(&info->pdev->dev, "register(%x) write error(%d)\n",  in charger_init_hw_regs()
785 	ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);  in charger_init_hw_regs()
787 		dev_err(&info->pdev->dev, "register(%x) read error(%d)\n",  in charger_init_hw_regs()
796 		info->cv = CV_4100MV;  in charger_init_hw_regs()
799 		info->cv = CV_4150MV;  in charger_init_hw_regs()
802 		info->cv = CV_4200MV;  in charger_init_hw_regs()
805 		info->cv = CV_4350MV;  in charger_init_hw_regs()
812 	info->cc = cc;  in charger_init_hw_regs()
818 	info->max_cv = info->cv;  in charger_init_hw_regs()
819 	info->max_cc = info->cc;  in charger_init_hw_regs()
828 	cancel_work_sync(&info->otg.work);  in axp288_charger_cancel_work()
829 	cancel_work_sync(&info->cable.work);  in axp288_charger_cancel_work()
836 	struct device *dev = &pdev->dev;  in axp288_charger_probe()
837 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);  in axp288_charger_probe()
847 		return -ENODEV;  in axp288_charger_probe()
853 	ret = regmap_read(axp20x->regmap, AXP20X_CC_CTRL, &val);  in axp288_charger_probe()
857 		return -ENODEV;  in axp288_charger_probe()
861 		return -ENOMEM;  in axp288_charger_probe()
863 	mutex_init(&info->lock);  in axp288_charger_probe()
864 	info->pdev = pdev;  in axp288_charger_probe()
865 	info->regmap = axp20x->regmap;  in axp288_charger_probe()
866 	info->regmap_irqc = axp20x->regmap_irqc;  in axp288_charger_probe()
868 	info->cable.edev = extcon_get_extcon_dev(AXP288_EXTCON_DEV_NAME);  in axp288_charger_probe()
869 	if (IS_ERR(info->cable.edev)) {  in axp288_charger_probe()
870 		dev_err_probe(dev, PTR_ERR(info->cable.edev),  in axp288_charger_probe()
873 		return PTR_ERR(info->cable.edev);  in axp288_charger_probe()
878 	 * "INT3496" (USB_HOST_EXTCON_HID) device. x86-android-tablets.ko  in axp288_charger_probe()
879 	 * instantiates an "intel-int3496" extcon on these devs as a workaround.  in axp288_charger_probe()
882 		extcon_name = "intel-int3496";  in axp288_charger_probe()
883 	else if (acpi_dev_present(USB_HOST_EXTCON_HID, NULL, -1))  in axp288_charger_probe()
887 		info->otg.cable = extcon_get_extcon_dev(extcon_name);  in axp288_charger_probe()
888 		if (IS_ERR(info->otg.cable)) {  in axp288_charger_probe()
889 			dev_err_probe(dev, PTR_ERR(info->otg.cable),  in axp288_charger_probe()
892 			return PTR_ERR(info->otg.cable);  in axp288_charger_probe()
894 		dev_info(dev, "Using " USB_HOST_EXTCON_HID " extcon for usb-id\n");  in axp288_charger_probe()
905 	info->psy_usb = devm_power_supply_register(dev, &axp288_charger_desc,  in axp288_charger_probe()
907 	if (IS_ERR(info->psy_usb)) {  in axp288_charger_probe()
908 		ret = PTR_ERR(info->psy_usb);  in axp288_charger_probe()
919 	INIT_WORK(&info->cable.work, axp288_charger_extcon_evt_worker);  in axp288_charger_probe()
920 	info->cable.nb.notifier_call = axp288_charger_handle_cable_evt;  in axp288_charger_probe()
921 	ret = devm_extcon_register_notifier_all(dev, info->cable.edev,  in axp288_charger_probe()
922 						&info->cable.nb);  in axp288_charger_probe()
927 	schedule_work(&info->cable.work);  in axp288_charger_probe()
930 	INIT_WORK(&info->otg.work, axp288_charger_otg_evt_worker);  in axp288_charger_probe()
931 	info->otg.id_nb.notifier_call = axp288_charger_handle_otg_evt;  in axp288_charger_probe()
932 	if (info->otg.cable) {  in axp288_charger_probe()
933 		ret = devm_extcon_register_notifier(dev, info->otg.cable,  in axp288_charger_probe()
934 					EXTCON_USB_HOST, &info->otg.id_nb);  in axp288_charger_probe()
939 		schedule_work(&info->otg.work);  in axp288_charger_probe()
944 		pirq = platform_get_irq(info->pdev, i);  in axp288_charger_probe()
948 		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);  in axp288_charger_probe()
949 		if (info->irq[i] < 0) {  in axp288_charger_probe()
950 			dev_warn(&info->pdev->dev,  in axp288_charger_probe()
952 			return info->irq[i];  in axp288_charger_probe()
954 		ret = devm_request_threaded_irq(&info->pdev->dev, info->irq[i],  in axp288_charger_probe()
956 					IRQF_ONESHOT, info->pdev->name, info);  in axp288_charger_probe()
959 								info->irq[i]);  in axp288_charger_probe()
984 MODULE_DESCRIPTION("X-power AXP288 Charger Driver");