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f9d96095e4
Add support for the Microchip USB5744 USB3.0 and USB2.0 Hub. The usb5744 driver trigger hub reset signal after soft reset. The usb5744 hub need to reset after the phy initialization, which toggles the gpio. Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com> Reviewed-by: Marek Vasut <marex@denx.de>
121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for onboard USB hubs
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*
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* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
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*
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* Mostly inspired by Linux kernel v6.1 onboard_usb_hub driver
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*/
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#include <asm/gpio.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <linux/delay.h>
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#include <power/regulator.h>
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struct onboard_hub {
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struct udevice *vdd;
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struct gpio_desc *reset_gpio;
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};
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struct onboard_hub_data {
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unsigned long reset_us;
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unsigned long power_on_delay_us;
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};
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int usb_onboard_hub_reset(struct udevice *dev)
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{
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struct onboard_hub_data *data =
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(struct onboard_hub_data *)dev_get_driver_data(dev);
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struct onboard_hub *hub = dev_get_priv(dev);
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int ret;
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hub->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_IS_OUT);
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/* property is optional, don't return error! */
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if (!hub->reset_gpio)
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return 0;
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ret = dm_gpio_set_value(hub->reset_gpio, 1);
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if (ret)
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return ret;
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udelay(data->reset_us);
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ret = dm_gpio_set_value(hub->reset_gpio, 0);
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if (ret)
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return ret;
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udelay(data->power_on_delay_us);
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return 0;
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}
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static int usb_onboard_hub_probe(struct udevice *dev)
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{
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struct onboard_hub *hub = dev_get_priv(dev);
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int ret;
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ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd);
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if (ret && ret != -ENOENT) {
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dev_err(dev, "can't get vdd-supply: %d\n", ret);
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return ret;
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}
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if (hub->vdd) {
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ret = regulator_set_enable_if_allowed(hub->vdd, true);
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if (ret && ret != -ENOSYS) {
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dev_err(dev, "can't enable vdd-supply: %d\n", ret);
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return ret;
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}
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}
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return usb_onboard_hub_reset(dev);
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}
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static int usb_onboard_hub_remove(struct udevice *dev)
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{
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struct onboard_hub *hub = dev_get_priv(dev);
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int ret;
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if (hub->reset_gpio)
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dm_gpio_free(hub->reset_gpio->dev, hub->reset_gpio);
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ret = regulator_set_enable_if_allowed(hub->vdd, false);
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if (ret)
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dev_err(dev, "can't disable vdd-supply: %d\n", ret);
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return ret;
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}
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static const struct onboard_hub_data usb2514_data = {
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.power_on_delay_us = 500,
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.reset_us = 1,
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};
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static const struct onboard_hub_data usb5744_data = {
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.power_on_delay_us = 1000,
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.reset_us = 5,
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};
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static const struct udevice_id usb_onboard_hub_ids[] = {
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/* Use generic usbVID,PID dt-bindings (usb-device.yaml) */
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{ .compatible = "usb424,2514", /* USB2514B USB 2.0 */
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.data = (ulong)&usb2514_data,
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}, {
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.compatible = "usb424,2744", /* USB2744 USB 2.0 */
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.data = (ulong)&usb5744_data,
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}, {
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.compatible = "usb424,5744", /* USB5744 USB 3.0 */
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.data = (ulong)&usb5744_data,
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}
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};
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U_BOOT_DRIVER(usb_onboard_hub) = {
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.name = "usb_onboard_hub",
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.id = UCLASS_USB_HUB,
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.probe = usb_onboard_hub_probe,
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.remove = usb_onboard_hub_remove,
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.of_match = usb_onboard_hub_ids,
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.priv_auto = sizeof(struct onboard_hub),
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};
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