1 // SPDX-License-Identifier: GPL-2.0-only
7  * board-mapphone-usb.c and cpcap-usb-det.c:
8  * Copyright (C) 2007 - 2011 Motorola, Inc.
24 #include <linux/gpio/consumer.h>
25 #include <linux/mfd/motorola-cpcap.h>
122 	struct gpio_desc *gpio[2];  member
135 	error = iio_read_channel_processed(ddata->vbus, &value);  in cpcap_usb_vbus_valid()
139 	dev_err(ddata->dev, "error reading VBUS: %i\n", error);  in cpcap_usb_vbus_valid()
144 static int cpcap_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)  in cpcap_usb_phy_set_host()  argument
146 	otg->host = host;  in cpcap_usb_phy_set_host()
148 		otg->state = OTG_STATE_UNDEFINED;  in cpcap_usb_phy_set_host()
153 static int cpcap_usb_phy_set_peripheral(struct usb_otg *otg,  in cpcap_usb_phy_set_peripheral()  argument
156 	otg->gadget = gadget;  in cpcap_usb_phy_set_peripheral()
158 		otg->state = OTG_STATE_UNDEFINED;  in cpcap_usb_phy_set_peripheral()
172 	error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);  in cpcap_phy_get_ints_state()
176 	s->id_ground = val & BIT(15);  in cpcap_phy_get_ints_state()
177 	s->id_float = val & BIT(14);  in cpcap_phy_get_ints_state()
178 	s->vbusov = val & BIT(11);  in cpcap_phy_get_ints_state()
180 	error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);  in cpcap_phy_get_ints_state()
184 	s->vbusvld = val & BIT(3);  in cpcap_phy_get_ints_state()
185 	s->sessvld = val & BIT(2);  in cpcap_phy_get_ints_state()
186 	s->sessend = val & BIT(1);  in cpcap_phy_get_ints_state()
187 	s->se1 = val & BIT(0);  in cpcap_phy_get_ints_state()
189 	error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);  in cpcap_phy_get_ints_state()
193 	s->dm = val & BIT(1);  in cpcap_phy_get_ints_state()
194 	s->dp = val & BIT(0);  in cpcap_phy_get_ints_state()
211 	dev_dbg(ddata->dev, "%s: musb_mailbox failed: %i\n",  in cpcap_usb_try_musb_mailbox()
230 	/* We need to kick the VBUS as USB A-host */  in cpcap_usb_detect()
231 	if (s.id_ground && ddata->vbus_provider) {  in cpcap_usb_detect()
232 		dev_dbg(ddata->dev, "still in USB A-host mode, kicking VBUS\n");  in cpcap_usb_detect()
236 		error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
246 	if (vbus && s.id_ground && ddata->docked) {  in cpcap_usb_detect()
247 		dev_dbg(ddata->dev, "still docked as A-host, signal ID down\n");  in cpcap_usb_detect()
255 	if (vbus && s.id_ground && !ddata->vbus_provider) {  in cpcap_usb_detect()
256 		dev_dbg(ddata->dev, "connected to a dock\n");  in cpcap_usb_detect()
258 		ddata->docked = true;  in cpcap_usb_detect()
271 		schedule_delayed_work(&ddata->detect_work,  in cpcap_usb_detect()
277 	if (s.id_ground && !ddata->docked) {  in cpcap_usb_detect()
278 		dev_dbg(ddata->dev, "id ground, USB host mode\n");  in cpcap_usb_detect()
280 		ddata->vbus_provider = true;  in cpcap_usb_detect()
288 		error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
298 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
308 		dev_dbg(ddata->dev, "connected to USB host\n");  in cpcap_usb_detect()
317 	ddata->vbus_provider = false;  in cpcap_usb_detect()
318 	ddata->docked = false;  in cpcap_usb_detect()
326 	dev_dbg(ddata->dev, "set UART mode\n");  in cpcap_usb_detect()
331 	dev_err(ddata->dev, "error setting cable state: %i\n", error);  in cpcap_usb_detect()
338 	if (!atomic_read(&ddata->active))  in cpcap_phy_irq_thread()
341 	schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));  in cpcap_phy_irq_thread()
354 		return -ENODEV;  in cpcap_usb_init_irq()
356 	error = devm_request_threaded_irq(ddata->dev, irq, NULL,  in cpcap_usb_init_irq()
362 		dev_err(ddata->dev, "could not get irq %s: %i\n",  in cpcap_usb_init_irq()
405 	if (!ddata->gpio[0] || !ddata->gpio[1])  in cpcap_usb_gpio_set_mode()
408 	gpiod_set_value(ddata->gpio[0], mode & 1);  in cpcap_usb_gpio_set_mode()
409 	gpiod_set_value(ddata->gpio[1], mode >> 1);  in cpcap_usb_gpio_set_mode()
423 	if (ddata->pins_uart) {  in cpcap_usb_set_uart_mode()
424 		error = pinctrl_select_state(ddata->pins, ddata->pins_uart);  in cpcap_usb_set_uart_mode()
429 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,  in cpcap_usb_set_uart_mode()
435 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,  in cpcap_usb_set_uart_mode()
441 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff,  in cpcap_usb_set_uart_mode()
454 	dev_err(ddata->dev, "%s failed with %i\n", __func__, error);  in cpcap_usb_set_uart_mode()
468 	if (ddata->pins_utmi) {  in cpcap_usb_set_usb_mode()
469 		error = pinctrl_select_state(ddata->pins, ddata->pins_utmi);  in cpcap_usb_set_usb_mode()
471 			dev_err(ddata->dev, "could not set usb mode: %i\n",  in cpcap_usb_set_usb_mode()
478 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,  in cpcap_usb_set_usb_mode()
483 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_set_usb_mode()
492 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,  in cpcap_usb_set_usb_mode()
506 	dev_err(ddata->dev, "%s failed with %i\n", __func__, error);  in cpcap_usb_set_usb_mode()
513 	ddata->pins = devm_pinctrl_get(ddata->dev);  in cpcap_usb_init_optional_pins()
514 	if (IS_ERR(ddata->pins)) {  in cpcap_usb_init_optional_pins()
515 		dev_info(ddata->dev, "default pins not configured: %ld\n",  in cpcap_usb_init_optional_pins()
516 			 PTR_ERR(ddata->pins));  in cpcap_usb_init_optional_pins()
517 		ddata->pins = NULL;  in cpcap_usb_init_optional_pins()
522 	ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi");  in cpcap_usb_init_optional_pins()
523 	if (IS_ERR(ddata->pins_ulpi)) {  in cpcap_usb_init_optional_pins()
524 		dev_info(ddata->dev, "ulpi pins not configured\n");  in cpcap_usb_init_optional_pins()
525 		ddata->pins_ulpi = NULL;  in cpcap_usb_init_optional_pins()
528 	ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi");  in cpcap_usb_init_optional_pins()
529 	if (IS_ERR(ddata->pins_utmi)) {  in cpcap_usb_init_optional_pins()
530 		dev_info(ddata->dev, "utmi pins not configured\n");  in cpcap_usb_init_optional_pins()
531 		ddata->pins_utmi = NULL;  in cpcap_usb_init_optional_pins()
534 	ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart");  in cpcap_usb_init_optional_pins()
535 	if (IS_ERR(ddata->pins_uart)) {  in cpcap_usb_init_optional_pins()
536 		dev_info(ddata->dev, "uart pins not configured\n");  in cpcap_usb_init_optional_pins()
537 		ddata->pins_uart = NULL;  in cpcap_usb_init_optional_pins()
540 	if (ddata->pins_uart)  in cpcap_usb_init_optional_pins()
541 		return pinctrl_select_state(ddata->pins, ddata->pins_uart);  in cpcap_usb_init_optional_pins()
551 		ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",  in cpcap_usb_init_optional_gpios()
553 		if (IS_ERR(ddata->gpio[i])) {  in cpcap_usb_init_optional_gpios()
554 			dev_info(ddata->dev, "no mode change GPIO%i: %li\n",  in cpcap_usb_init_optional_gpios()
555 				 i, PTR_ERR(ddata->gpio[i]));  in cpcap_usb_init_optional_gpios()
556 			ddata->gpio[i] = NULL;  in cpcap_usb_init_optional_gpios()
566 	ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus");  in cpcap_usb_init_iio()
567 	if (IS_ERR(ddata->vbus)) {  in cpcap_usb_init_iio()
568 		error = PTR_ERR(ddata->vbus);  in cpcap_usb_init_iio()
572 	if (!ddata->vbus->indio_dev) {  in cpcap_usb_init_iio()
573 		error = -ENXIO;  in cpcap_usb_init_iio()
577 	error = iio_get_channel_type(ddata->vbus, &type);  in cpcap_usb_init_iio()
582 		error = -EINVAL;  in cpcap_usb_init_iio()
589 	dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",  in cpcap_usb_init_iio()
598 		.compatible = "motorola,cpcap-usb-phy",
601 		.compatible = "motorola,mapphone-cpcap-usb-phy",
613 	struct usb_otg *otg;  in cpcap_usb_phy_probe()  local
616 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);  in cpcap_usb_phy_probe()
618 		return -ENOMEM;  in cpcap_usb_phy_probe()
620 	ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);  in cpcap_usb_phy_probe()
621 	if (!ddata->reg)  in cpcap_usb_phy_probe()
622 		return -ENODEV;  in cpcap_usb_phy_probe()
624 	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);  in cpcap_usb_phy_probe()
625 	if (!otg)  in cpcap_usb_phy_probe()
626 		return -ENOMEM;  in cpcap_usb_phy_probe()
628 	ddata->dev = &pdev->dev;  in cpcap_usb_phy_probe()
629 	ddata->phy.dev = ddata->dev;  in cpcap_usb_phy_probe()
630 	ddata->phy.label = "cpcap_usb_phy";  in cpcap_usb_phy_probe()
631 	ddata->phy.otg = otg;  in cpcap_usb_phy_probe()
632 	ddata->phy.type = USB_PHY_TYPE_USB2;  in cpcap_usb_phy_probe()
633 	otg->set_host = cpcap_usb_phy_set_host;  in cpcap_usb_phy_probe()
634 	otg->set_peripheral = cpcap_usb_phy_set_peripheral;  in cpcap_usb_phy_probe()
635 	otg->usb_phy = &ddata->phy;  in cpcap_usb_phy_probe()
636 	INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);  in cpcap_usb_phy_probe()
639 	ddata->vusb = devm_regulator_get(&pdev->dev, "vusb");  in cpcap_usb_phy_probe()
640 	if (IS_ERR(ddata->vusb))  in cpcap_usb_phy_probe()
641 		return PTR_ERR(ddata->vusb);  in cpcap_usb_phy_probe()
643 	error = regulator_enable(ddata->vusb);  in cpcap_usb_phy_probe()
647 	generic_phy = devm_phy_create(ddata->dev, NULL, &ops);  in cpcap_usb_phy_probe()
655 	phy_provider = devm_of_phy_provider_register(ddata->dev,  in cpcap_usb_phy_probe()
676 	usb_add_phy_dev(&ddata->phy);  in cpcap_usb_phy_probe()
677 	atomic_set(&ddata->active, 1);  in cpcap_usb_phy_probe()
678 	schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));  in cpcap_usb_phy_probe()
683 	regulator_disable(ddata->vusb);  in cpcap_usb_phy_probe()
693 	atomic_set(&ddata->active, 0);  in cpcap_usb_phy_remove()
696 		dev_err(ddata->dev, "could not set UART mode\n");  in cpcap_usb_phy_remove()
700 	usb_remove_phy(&ddata->phy);  in cpcap_usb_phy_remove()
701 	cancel_delayed_work_sync(&ddata->detect_work);  in cpcap_usb_phy_remove()
702 	regulator_disable(ddata->vusb);  in cpcap_usb_phy_remove()
709 		.name	= "cpcap-usb-phy",