1 // SPDX-License-Identifier: GPL-2.0
7  * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
10 #include <linux/extcon-provider.h>
22 #include <linux/usb/role.h>
24 #include "extcon-intel.h"
67 /* 0 - open drain, 1 - regular push-pull output */
69 /* 0 - pin is controlled by SW, 1 - by HW */
125 	 * According to the spec. we should read the USB-ID pin ADC value here  in cht_wc_extcon_get_id()
126 	 * to determine the resistance of the used pull-down resister and then  in cht_wc_extcon_get_id()
129 	 * a combination of a charging port with one or more USB-A ports, so  in cht_wc_extcon_get_id()
131 	 * is hard to read / badly-worded so some of them actually indicate  in cht_wc_extcon_get_id()
152 		ret = regmap_read(ext->regmap, CHT_WC_USBSRC, &usbsrc);  in cht_wc_extcon_get_charger()
154 			dev_err(ext->dev, "Error reading usbsrc: %d\n", ret);  in cht_wc_extcon_get_charger()
169 				dev_warn(ext->dev, "Could not detect charger type\n");  in cht_wc_extcon_get_charger()
171 				dev_warn(ext->dev, "Timeout detecting charger type\n");  in cht_wc_extcon_get_charger()
181 		dev_warn(ext->dev,  in cht_wc_extcon_get_charger()
182 			"Unhandled charger type %d, defaulting to SDP\n",  in cht_wc_extcon_get_charger()
184 		ext->usb_type = POWER_SUPPLY_USB_TYPE_SDP;  in cht_wc_extcon_get_charger()
189 		ext->usb_type = POWER_SUPPLY_USB_TYPE_SDP;  in cht_wc_extcon_get_charger()
192 		ext->usb_type = POWER_SUPPLY_USB_TYPE_CDP;  in cht_wc_extcon_get_charger()
197 		ext->usb_type = POWER_SUPPLY_USB_TYPE_DCP;  in cht_wc_extcon_get_charger()
200 		ext->usb_type = POWER_SUPPLY_USB_TYPE_ACA;  in cht_wc_extcon_get_charger()
209 	ret = regmap_write(ext->regmap, CHT_WC_PHYCTRL, state);  in cht_wc_extcon_set_phymux()
211 		dev_err(ext->dev, "Error writing phyctrl: %d\n", ret);  in cht_wc_extcon_set_phymux()
227 	ret = regmap_write(ext->regmap, CHT_WC_VBUS_GPIO_CTLO, val);  in cht_wc_extcon_set_5v_boost()
229 		dev_err(ext->dev, "Error writing Vbus GPIO CTLO: %d\n", ret);  in cht_wc_extcon_set_5v_boost()
238 	ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL1,  in cht_wc_extcon_set_otgmode()
241 		dev_err(ext->dev, "Error updating CHGRCTRL1 reg: %d\n", ret);  in cht_wc_extcon_set_otgmode()
243 	if (ext->vbus_boost && ext->vbus_boost_enabled != enable) {  in cht_wc_extcon_set_otgmode()
245 			ret = regulator_enable(ext->vbus_boost);  in cht_wc_extcon_set_otgmode()
247 			ret = regulator_disable(ext->vbus_boost);  in cht_wc_extcon_set_otgmode()
250 			dev_err(ext->dev, "Error updating Vbus boost regulator: %d\n", ret);  in cht_wc_extcon_set_otgmode()
252 			ext->vbus_boost_enabled = enable;  in cht_wc_extcon_set_otgmode()
262 	ret = regmap_update_bits(ext->regmap, CHT_WC_CHGDISCTRL,  in cht_wc_extcon_enable_charging()
265 		dev_err(ext->dev, "Error updating CHGDISCTRL reg: %d\n", ret);  in cht_wc_extcon_enable_charging()
272 	extcon_set_state_sync(ext->edev, cable, state);  in cht_wc_extcon_set_state()
274 		extcon_set_state_sync(ext->edev, EXTCON_USB, state);  in cht_wc_extcon_set_state()
282 	bool ignore_get_charger_errors = ext->usb_host;  in cht_wc_extcon_pwrsrc_event()
285 	ext->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in cht_wc_extcon_pwrsrc_event()
287 	ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts);  in cht_wc_extcon_pwrsrc_event()
289 		dev_err(ext->dev, "Error reading pwrsrc status: %d\n", ret);  in cht_wc_extcon_pwrsrc_event()
298 		/* The 5v boost causes a false VBUS / SDP detect, skip */  in cht_wc_extcon_pwrsrc_event()
307 		/* Route D+ and D- to PMIC for future charger detection */  in cht_wc_extcon_pwrsrc_event()
317 	/* Route D+ and D- to SoC for the host or gadget controller */  in cht_wc_extcon_pwrsrc_event()
321 	if (cable != ext->previous_cable) {  in cht_wc_extcon_pwrsrc_event()
323 		cht_wc_extcon_set_state(ext, ext->previous_cable, false);  in cht_wc_extcon_pwrsrc_event()
324 		ext->previous_cable = cable;  in cht_wc_extcon_pwrsrc_event()
327 	ext->usb_host = ((id == INTEL_USB_ID_GND) || (id == INTEL_USB_RID_A));  in cht_wc_extcon_pwrsrc_event()
328 	extcon_set_state_sync(ext->edev, EXTCON_USB_HOST, ext->usb_host);  in cht_wc_extcon_pwrsrc_event()
330 	if (ext->usb_host)  in cht_wc_extcon_pwrsrc_event()
337 	/* Note: this is a no-op when ext->role_sw is NULL */  in cht_wc_extcon_pwrsrc_event()
338 	ret = usb_role_switch_set_role(ext->role_sw, role);  in cht_wc_extcon_pwrsrc_event()
340 		dev_err(ext->dev, "Error setting USB-role: %d\n", ret);  in cht_wc_extcon_pwrsrc_event()
342 	if (ext->psy)  in cht_wc_extcon_pwrsrc_event()
343 		power_supply_changed(ext->psy);  in cht_wc_extcon_pwrsrc_event()
351 	ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_IRQ, &irqs);  in cht_wc_extcon_isr()
353 		dev_err(ext->dev, "Error reading irqs: %d\n", ret);  in cht_wc_extcon_isr()
359 	ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ, irqs);  in cht_wc_extcon_isr()
361 		dev_err(ext->dev, "Error writing irqs: %d\n", ret);  in cht_wc_extcon_isr()
373 	ret = regmap_update_bits(ext->regmap, CHT_WC_CHGDISCTRL,  in cht_wc_extcon_sw_control()
376 		dev_err(ext->dev,  in cht_wc_extcon_sw_control()
382 	ret = regmap_update_bits(ext->regmap, CHT_WC_CHGRCTRL0, mask, val);  in cht_wc_extcon_sw_control()
384 		dev_err(ext->dev, "Error setting sw control: %d\n", ret);  in cht_wc_extcon_sw_control()
394 	swnode = software_node_find_by_name(NULL, "intel-xhci-usb-sw");  in cht_wc_extcon_find_role_sw()
396 		return -EPROBE_DEFER;  in cht_wc_extcon_find_role_sw()
399 	ext->role_sw = usb_role_switch_find_by_fwnode(fwnode);  in cht_wc_extcon_find_role_sw()
402 	return ext->role_sw ? 0 : -EPROBE_DEFER;  in cht_wc_extcon_find_role_sw()
409 	usb_role_switch_put(ext->role_sw);  in cht_wc_extcon_put_role_sw()
412 /* Some boards require controlling the role-sw and Vbus based on the id-pin */
421 	ret = devm_add_action_or_reset(ext->dev, cht_wc_extcon_put_role_sw, ext);  in cht_wc_extcon_get_role_sw_and_regulator()
426 	 * On x86/ACPI platforms the regulator <-> consumer link is provided  in cht_wc_extcon_get_role_sw_and_regulator()
432 	ext->vbus_boost = devm_regulator_get_optional(ext->dev, "vbus");  in cht_wc_extcon_get_role_sw_and_regulator()
433 	if (IS_ERR(ext->vbus_boost)) {  in cht_wc_extcon_get_role_sw_and_regulator()
434 		ret = PTR_ERR(ext->vbus_boost);  in cht_wc_extcon_get_role_sw_and_regulator()
435 		if (ret == -ENODEV)  in cht_wc_extcon_get_role_sw_and_regulator()
436 			ret = -EPROBE_DEFER;  in cht_wc_extcon_get_role_sw_and_regulator()
438 		return dev_err_probe(ext->dev, ret, "getting Vbus regulator");  in cht_wc_extcon_get_role_sw_and_regulator()
452 		val->intval = ext->usb_type;  in cht_wc_extcon_psy_get_prop()
455 		val->intval = ext->usb_type ? 1 : 0;  in cht_wc_extcon_psy_get_prop()
458 		return -EINVAL;  in cht_wc_extcon_psy_get_prop()
486 	ext->psy = devm_power_supply_register(ext->dev,  in cht_wc_extcon_register_psy()
489 	return PTR_ERR_OR_ZERO(ext->psy);  in cht_wc_extcon_register_psy()
494 	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);  in cht_wc_extcon_probe()
504 	ext = devm_kzalloc(&pdev->dev, sizeof(*ext), GFP_KERNEL);  in cht_wc_extcon_probe()
506 		return -ENOMEM;  in cht_wc_extcon_probe()
508 	ext->dev = &pdev->dev;  in cht_wc_extcon_probe()
509 	ext->regmap = pmic->regmap;  in cht_wc_extcon_probe()
510 	ext->previous_cable = EXTCON_NONE;  in cht_wc_extcon_probe()
513 	ext->edev = devm_extcon_dev_allocate(ext->dev, cht_wc_extcon_cables);  in cht_wc_extcon_probe()
514 	if (IS_ERR(ext->edev))  in cht_wc_extcon_probe()
515 		return PTR_ERR(ext->edev);  in cht_wc_extcon_probe()
517 	switch (pmic->cht_wc_model) {  in cht_wc_extcon_probe()
520 		 * When a host-cable is detected the BIOS enables an external 5v boost  in cht_wc_extcon_probe()
525 		 *    (and unless we drive the external-charger-disable pin high it  in cht_wc_extcon_probe()
527 		 * 2) This gets seen by the pwrsrc block as a SDP USB Vbus supply  in cht_wc_extcon_probe()
536 		/* Do this first, as it may very well return -EPROBE_DEFER. */  in cht_wc_extcon_probe()
541 		 * The bq25890 used here relies on this driver's BC-1.2 charger  in cht_wc_extcon_probe()
544 		 * models the detected charger (idem to how the Type-C TCPM code  in cht_wc_extcon_probe()
569 	ret = devm_extcon_dev_register(ext->dev, ext->edev);  in cht_wc_extcon_probe()
571 		dev_err(ext->dev, "Error registering extcon device: %d\n", ret);  in cht_wc_extcon_probe()
575 	ret = regmap_read(ext->regmap, CHT_WC_PWRSRC_STS, &pwrsrc_sts);  in cht_wc_extcon_probe()
577 		dev_err(ext->dev, "Error reading pwrsrc status: %d\n", ret);  in cht_wc_extcon_probe()
582 	 * If no USB host or device connected, route D+ and D- to PMIC for  in cht_wc_extcon_probe()
592 	ret = devm_request_threaded_irq(ext->dev, irq, NULL, cht_wc_extcon_isr,  in cht_wc_extcon_probe()
593 					IRQF_ONESHOT, pdev->name, ext);  in cht_wc_extcon_probe()
595 		dev_err(ext->dev, "Error requesting interrupt: %d\n", ret);  in cht_wc_extcon_probe()
600 	ret = regmap_write(ext->regmap, CHT_WC_PWRSRC_IRQ_MASK, mask);  in cht_wc_extcon_probe()
602 		dev_err(ext->dev, "Error writing irq-mask: %d\n", ret);  in cht_wc_extcon_probe()