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https://github.com/AsahiLinux/u-boot
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6a6468f479
When the device tree indicates support for role switching through the "usb-role-switch" property, take the "role-switch-default-mode" property into account when deciding which role to put the controller into. This makes USB devices work on Apple M1 systems where the device tree may include a "dr_mode" property that is set to "otg", but where we need to put the controller into "host" mode to see devices connected to the type-C ports. Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Provides code common for host and device side USB.
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*
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* (C) Copyright 2016
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <asm/global_data.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/phy.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const char *const usb_dr_modes[] = {
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[USB_DR_MODE_UNKNOWN] = "",
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[USB_DR_MODE_HOST] = "host",
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[USB_DR_MODE_PERIPHERAL] = "peripheral",
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[USB_DR_MODE_OTG] = "otg",
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};
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enum usb_dr_mode usb_get_dr_mode(ofnode node)
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{
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const char *dr_mode;
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int i;
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dr_mode = ofnode_read_string(node, "dr_mode");
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if (!dr_mode) {
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pr_debug("usb dr_mode not found\n");
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return USB_DR_MODE_UNKNOWN;
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}
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for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
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if (!strcmp(dr_mode, usb_dr_modes[i]))
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return i;
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return USB_DR_MODE_UNKNOWN;
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}
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enum usb_dr_mode usb_get_role_switch_default_mode(ofnode node)
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{
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const char *dr_mode;
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int i;
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dr_mode = ofnode_read_string(node, "role-switch-default-mode");
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if (!dr_mode)
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return USB_DR_MODE_UNKNOWN;
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for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
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if (!strcmp(dr_mode, usb_dr_modes[i]))
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return i;
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return USB_DR_MODE_UNKNOWN;
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}
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static const char *const speed_names[] = {
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[USB_SPEED_UNKNOWN] = "UNKNOWN",
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[USB_SPEED_LOW] = "low-speed",
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[USB_SPEED_FULL] = "full-speed",
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[USB_SPEED_HIGH] = "high-speed",
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[USB_SPEED_WIRELESS] = "wireless",
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[USB_SPEED_SUPER] = "super-speed",
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[USB_SPEED_SUPER_PLUS] = "super-speed-plus",
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};
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const char *usb_speed_string(enum usb_device_speed speed)
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{
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if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
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speed = USB_SPEED_UNKNOWN;
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return speed_names[speed];
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}
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enum usb_device_speed usb_get_maximum_speed(ofnode node)
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{
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const char *max_speed;
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int i;
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max_speed = ofnode_read_string(node, "maximum-speed");
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if (!max_speed) {
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pr_debug("usb maximum-speed not found\n");
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return USB_SPEED_UNKNOWN;
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}
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for (i = 0; i < ARRAY_SIZE(speed_names); i++)
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if (!strcmp(max_speed, speed_names[i]))
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return i;
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return USB_SPEED_UNKNOWN;
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}
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#if CONFIG_IS_ENABLED(DM_USB)
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static const char *const usbphy_modes[] = {
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[USBPHY_INTERFACE_MODE_UNKNOWN] = "",
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[USBPHY_INTERFACE_MODE_UTMI] = "utmi",
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[USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide",
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[USBPHY_INTERFACE_MODE_ULPI] = "ulpi",
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[USBPHY_INTERFACE_MODE_SERIAL] = "serial",
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[USBPHY_INTERFACE_MODE_HSIC] = "hsic",
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};
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enum usb_phy_interface usb_get_phy_mode(ofnode node)
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{
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const char *phy_type;
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int i;
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phy_type = ofnode_get_property(node, "phy_type", NULL);
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if (!phy_type)
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return USBPHY_INTERFACE_MODE_UNKNOWN;
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for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++)
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if (!strcmp(phy_type, usbphy_modes[i]))
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return i;
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return USBPHY_INTERFACE_MODE_UNKNOWN;
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}
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#endif
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