1 // SPDX-License-Identifier: GPL-2.0-only
3  * Motorola CPCAP PMIC USB PHY driver
7  * board-mapphone-usb.c and cpcap-usb-det.c:
8  * Copyright (C) 2007 - 2011 Motorola, Inc.
26 #include <linux/mfd/motorola-cpcap.h>
30 #include <linux/usb/musb.h>
110 	CPCAP_UNKNOWN_DISABLED,	/* Seems to disable USB lines */
124 	struct iio_channel *vbus;  member
136 	error = iio_read_channel_processed(ddata->vbus, &value);  in cpcap_usb_vbus_valid()
140 	dev_err(ddata->dev, "error reading VBUS: %i\n", error);  in cpcap_usb_vbus_valid()
147 	otg->host = host;  in cpcap_usb_phy_set_host()
149 		otg->state = OTG_STATE_UNDEFINED;  in cpcap_usb_phy_set_host()
157 	otg->gadget = gadget;  in cpcap_usb_phy_set_peripheral()
159 		otg->state = OTG_STATE_UNDEFINED;  in cpcap_usb_phy_set_peripheral()
173 	error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);  in cpcap_phy_get_ints_state()
177 	s->id_ground = val & BIT(15);  in cpcap_phy_get_ints_state()
178 	s->id_float = val & BIT(14);  in cpcap_phy_get_ints_state()
179 	s->vbusov = val & BIT(11);  in cpcap_phy_get_ints_state()
181 	error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);  in cpcap_phy_get_ints_state()
185 	s->vbusvld = val & BIT(3);  in cpcap_phy_get_ints_state()
186 	s->sessvld = val & BIT(2);  in cpcap_phy_get_ints_state()
187 	s->sessend = val & BIT(1);  in cpcap_phy_get_ints_state()
188 	s->se1 = val & BIT(0);  in cpcap_phy_get_ints_state()
190 	error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);  in cpcap_phy_get_ints_state()
194 	s->dm = val & BIT(1);  in cpcap_phy_get_ints_state()
195 	s->dp = val & BIT(0);  in cpcap_phy_get_ints_state()
212 	dev_dbg(ddata->dev, "%s: musb_mailbox failed: %i\n",  in cpcap_usb_try_musb_mailbox()
220 	bool vbus = false;  in cpcap_usb_detect()  local
229 	vbus = cpcap_usb_vbus_valid(ddata);  in cpcap_usb_detect()
231 	/* We need to kick the VBUS as USB A-host */  in cpcap_usb_detect()
232 	if (s.id_ground && ddata->vbus_provider) {  in cpcap_usb_detect()
233 		dev_dbg(ddata->dev, "still in USB A-host mode, kicking VBUS\n");  in cpcap_usb_detect()
237 		error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
247 	if (vbus && s.id_ground && ddata->docked) {  in cpcap_usb_detect()
248 		dev_dbg(ddata->dev, "still docked as A-host, signal ID down\n");  in cpcap_usb_detect()
255 	/* No VBUS needed with docks */  in cpcap_usb_detect()
256 	if (vbus && s.id_ground && !ddata->vbus_provider) {  in cpcap_usb_detect()
257 		dev_dbg(ddata->dev, "connected to a dock\n");  in cpcap_usb_detect()
259 		ddata->docked = true;  in cpcap_usb_detect()
272 		schedule_delayed_work(&ddata->detect_work,  in cpcap_usb_detect()
278 	if (s.id_ground && !ddata->docked) {  in cpcap_usb_detect()
279 		dev_dbg(ddata->dev, "id ground, USB host mode\n");  in cpcap_usb_detect()
281 		ddata->vbus_provider = true;  in cpcap_usb_detect()
289 		error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
299 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_detect()
305 	vbus = cpcap_usb_vbus_valid(ddata);  in cpcap_usb_detect()
307 	/* Otherwise assume we're connected to a USB host */  in cpcap_usb_detect()
308 	if (vbus) {  in cpcap_usb_detect()
309 		dev_dbg(ddata->dev, "connected to USB host\n");  in cpcap_usb_detect()
318 	ddata->vbus_provider = false;  in cpcap_usb_detect()
319 	ddata->docked = false;  in cpcap_usb_detect()
327 	dev_dbg(ddata->dev, "set UART mode\n");  in cpcap_usb_detect()
332 	dev_err(ddata->dev, "error setting cable state: %i\n", error);  in cpcap_usb_detect()
339 	if (!atomic_read(&ddata->active))  in cpcap_phy_irq_thread()
342 	schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));  in cpcap_phy_irq_thread()
355 		return -ENODEV;  in cpcap_usb_init_irq()
357 	error = devm_request_threaded_irq(ddata->dev, irq, NULL,  in cpcap_usb_init_irq()
363 		dev_err(ddata->dev, "could not get irq %s: %i\n",  in cpcap_usb_init_irq()
406 	if (!ddata->gpio[0] || !ddata->gpio[1])  in cpcap_usb_gpio_set_mode()
409 	gpiod_set_value(ddata->gpio[0], mode & 1);  in cpcap_usb_gpio_set_mode()
410 	gpiod_set_value(ddata->gpio[1], mode >> 1);  in cpcap_usb_gpio_set_mode()
424 	if (ddata->pins_uart) {  in cpcap_usb_set_uart_mode()
425 		error = pinctrl_select_state(ddata->pins, ddata->pins_uart);  in cpcap_usb_set_uart_mode()
430 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,  in cpcap_usb_set_uart_mode()
436 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,  in cpcap_usb_set_uart_mode()
442 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff,  in cpcap_usb_set_uart_mode()
455 	dev_err(ddata->dev, "%s failed with %i\n", __func__, error);  in cpcap_usb_set_uart_mode()
469 	if (ddata->pins_utmi) {  in cpcap_usb_set_usb_mode()
470 		error = pinctrl_select_state(ddata->pins, ddata->pins_utmi);  in cpcap_usb_set_usb_mode()
472 			dev_err(ddata->dev, "could not set usb mode: %i\n",  in cpcap_usb_set_usb_mode()
479 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,  in cpcap_usb_set_usb_mode()
484 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,  in cpcap_usb_set_usb_mode()
493 	error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,  in cpcap_usb_set_usb_mode()
499 	/* Enable USB mode */  in cpcap_usb_set_usb_mode()
507 	dev_err(ddata->dev, "%s failed with %i\n", __func__, error);  in cpcap_usb_set_usb_mode()
514 	ddata->pins = devm_pinctrl_get(ddata->dev);  in cpcap_usb_init_optional_pins()
515 	if (IS_ERR(ddata->pins)) {  in cpcap_usb_init_optional_pins()
516 		dev_info(ddata->dev, "default pins not configured: %ld\n",  in cpcap_usb_init_optional_pins()
517 			 PTR_ERR(ddata->pins));  in cpcap_usb_init_optional_pins()
518 		ddata->pins = NULL;  in cpcap_usb_init_optional_pins()
523 	ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi");  in cpcap_usb_init_optional_pins()
524 	if (IS_ERR(ddata->pins_ulpi)) {  in cpcap_usb_init_optional_pins()
525 		dev_info(ddata->dev, "ulpi pins not configured\n");  in cpcap_usb_init_optional_pins()
526 		ddata->pins_ulpi = NULL;  in cpcap_usb_init_optional_pins()
529 	ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi");  in cpcap_usb_init_optional_pins()
530 	if (IS_ERR(ddata->pins_utmi)) {  in cpcap_usb_init_optional_pins()
531 		dev_info(ddata->dev, "utmi pins not configured\n");  in cpcap_usb_init_optional_pins()
532 		ddata->pins_utmi = NULL;  in cpcap_usb_init_optional_pins()
535 	ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart");  in cpcap_usb_init_optional_pins()
536 	if (IS_ERR(ddata->pins_uart)) {  in cpcap_usb_init_optional_pins()
537 		dev_info(ddata->dev, "uart pins not configured\n");  in cpcap_usb_init_optional_pins()
538 		ddata->pins_uart = NULL;  in cpcap_usb_init_optional_pins()
541 	if (ddata->pins_uart)  in cpcap_usb_init_optional_pins()
542 		return pinctrl_select_state(ddata->pins, ddata->pins_uart);  in cpcap_usb_init_optional_pins()
552 		ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",  in cpcap_usb_init_optional_gpios()
554 		if (IS_ERR(ddata->gpio[i])) {  in cpcap_usb_init_optional_gpios()
555 			dev_info(ddata->dev, "no mode change GPIO%i: %li\n",  in cpcap_usb_init_optional_gpios()
556 				 i, PTR_ERR(ddata->gpio[i]));  in cpcap_usb_init_optional_gpios()
557 			ddata->gpio[i] = NULL;  in cpcap_usb_init_optional_gpios()
567 	ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus");  in cpcap_usb_init_iio()
568 	if (IS_ERR(ddata->vbus)) {  in cpcap_usb_init_iio()
569 		error = PTR_ERR(ddata->vbus);  in cpcap_usb_init_iio()
573 	if (!ddata->vbus->indio_dev) {  in cpcap_usb_init_iio()
574 		error = -ENXIO;  in cpcap_usb_init_iio()
578 	error = iio_get_channel_type(ddata->vbus, &type);  in cpcap_usb_init_iio()
583 		error = -EINVAL;  in cpcap_usb_init_iio()
590 	dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",  in cpcap_usb_init_iio()
599 		.compatible = "motorola,cpcap-usb-phy",
602 		.compatible = "motorola,mapphone-cpcap-usb-phy",
619 				&pdev->dev);  in cpcap_usb_phy_probe()
621 		return -EINVAL;  in cpcap_usb_phy_probe()
623 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);  in cpcap_usb_phy_probe()
625 		return -ENOMEM;  in cpcap_usb_phy_probe()
627 	ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);  in cpcap_usb_phy_probe()
628 	if (!ddata->reg)  in cpcap_usb_phy_probe()
629 		return -ENODEV;  in cpcap_usb_phy_probe()
631 	otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);  in cpcap_usb_phy_probe()
633 		return -ENOMEM;  in cpcap_usb_phy_probe()
635 	ddata->dev = &pdev->dev;  in cpcap_usb_phy_probe()
636 	ddata->phy.dev = ddata->dev;  in cpcap_usb_phy_probe()
637 	ddata->phy.label = "cpcap_usb_phy";  in cpcap_usb_phy_probe()
638 	ddata->phy.otg = otg;  in cpcap_usb_phy_probe()
639 	ddata->phy.type = USB_PHY_TYPE_USB2;  in cpcap_usb_phy_probe()
640 	otg->set_host = cpcap_usb_phy_set_host;  in cpcap_usb_phy_probe()
641 	otg->set_peripheral = cpcap_usb_phy_set_peripheral;  in cpcap_usb_phy_probe()
642 	otg->usb_phy = &ddata->phy;  in cpcap_usb_phy_probe()
643 	INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);  in cpcap_usb_phy_probe()
646 	ddata->vusb = devm_regulator_get(&pdev->dev, "vusb");  in cpcap_usb_phy_probe()
647 	if (IS_ERR(ddata->vusb))  in cpcap_usb_phy_probe()
648 		return PTR_ERR(ddata->vusb);  in cpcap_usb_phy_probe()
650 	error = regulator_enable(ddata->vusb);  in cpcap_usb_phy_probe()
654 	generic_phy = devm_phy_create(ddata->dev, NULL, &ops);  in cpcap_usb_phy_probe()
662 	phy_provider = devm_of_phy_provider_register(ddata->dev,  in cpcap_usb_phy_probe()
683 	usb_add_phy_dev(&ddata->phy);  in cpcap_usb_phy_probe()
684 	atomic_set(&ddata->active, 1);  in cpcap_usb_phy_probe()
685 	schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));  in cpcap_usb_phy_probe()
690 	regulator_disable(ddata->vusb);  in cpcap_usb_phy_probe()
700 	atomic_set(&ddata->active, 0);  in cpcap_usb_phy_remove()
703 		dev_err(ddata->dev, "could not set UART mode\n");  in cpcap_usb_phy_remove()
707 	usb_remove_phy(&ddata->phy);  in cpcap_usb_phy_remove()
708 	cancel_delayed_work_sync(&ddata->detect_work);  in cpcap_usb_phy_remove()
709 	regulator_disable(ddata->vusb);  in cpcap_usb_phy_remove()
716 		.name	= "cpcap-usb-phy",
725 MODULE_DESCRIPTION("CPCAP usb phy driver");