2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2019 Ian Lepore <ian@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/types.h>
32 #include <sys/condvar.h>
34 #include <dev/fdt/fdt_common.h>
35 #include <dev/ofw/ofw_bus_subr.h>
36 #include <dev/ofw/openfirm.h>
38 #include <dev/usb/usb.h>
39 #include <dev/usb/usbdi.h>
40 #include <dev/usb/usb_process.h>
41 #include <dev/usb/usb_busdma.h>
42 #include <dev/usb/usb_controller.h>
43 #include <dev/usb/usb_bus.h>
44 #include <dev/usb/usb_device.h>
45 #include <dev/usb/usb_freebsd.h>
46 #include <dev/usb/usb_fdt_support.h>
47 #include <dev/usb/net/usb_ethernet.h>
50 * Define a constant for allocating an array pointers to serve as a stack of
51 * devices between the controller and any arbitrary device on the bus. The
52 * stack ends with the device itself, so add 1 to the max hub nesting depth.
54 #define MAX_UDEV_NEST (MAX(USB_HUB_MAX_DEPTH, USB_SS_HUB_DEPTH_MAX) + 1)
57 find_udev_in_children(phandle_t parent, struct usb_device *udev)
62 char compat[16]; /* big enough for "usb1234,abcd" */
65 * USB device nodes in FDT have a compatible string of "usb" followed by
66 * the vendorId,productId rendered in hex. The port number is encoded
67 * in the standard 'reg' property; it is one-based in the FDT data, but
68 * usb_device.port_index is zero-based. To uniquely identify a device,
69 * both the compatible string and the port number must match.
71 snprintf(compat, sizeof(compat), "usb%x,%x",
72 UGETW(udev->ddesc.idVendor), UGETW(udev->ddesc.idProduct));
73 for (child = OF_child(parent); child != 0; child = OF_peer(child)) {
74 if (!ofw_bus_node_is_compatible(child, compat))
76 proplen = OF_getencprop(child, "reg", &port, sizeof(port));
77 if (proplen != sizeof(port))
79 if (port == (udev->port_index + 1))
86 is_valid_mac_addr(uint8_t *addr)
90 * All-bits-zero and all-bits-one are a couple common cases of what
91 * might get read from unprogrammed eeprom or OTP data, weed them out.
93 if ((addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5]) == 0x00)
95 if ((addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff)
101 usb_fdt_get_mac_addr(device_t dev, struct usb_ether* ue)
105 uint8_t mac[sizeof(ue->ue_eaddr)];
106 static const char *properties[] = {
111 if ((node = usb_fdt_get_node(ue->ue_dev, ue->ue_udev)) == -1)
113 for (i = 0; i < nitems(properties); ++i) {
114 proplen = OF_getprop(node, properties[i], mac, sizeof(mac));
115 if (proplen == sizeof(mac) && is_valid_mac_addr(mac)) {
116 memcpy(ue->ue_eaddr, mac, sizeof(ue->ue_eaddr));
124 usb_fdt_get_node(device_t dev, struct usb_device *udev)
126 struct usb_device *ud;
127 struct usb_device *udev_stack[MAX_UDEV_NEST];
128 phandle_t controller_node, node;
132 * Start searching at the controller node. The usb_device links to the
133 * bus, and its parent is the controller. If we can't get the
134 * controller node, the requesting device cannot be in the fdt data.
136 if ((controller_node = ofw_bus_get_node(udev->bus->parent)) == -1)
140 * Walk up the usb hub ancestor hierarchy, building a stack of devices
141 * that begins with the requesting device and includes all the hubs
142 * between it and the controller, NOT including the root hub (the FDT
143 * bindings treat the controller and root hub as the same thing).
145 for (ud = udev, idx = 0; ud->parent_hub != NULL; ud = ud->parent_hub) {
146 KASSERT(idx < nitems(udev_stack), ("Too many hubs"));
147 udev_stack[idx++] = ud;
151 * Now walk down the stack of udevs from the controller to the
152 * requesting device, and also down the hierarchy of nested children of
153 * the controller node in the fdt data. At each nesting level of fdt
154 * data look for a child node whose properties match the vID,pID,portIdx
155 * tuple for the udev at the corresponding layer of the udev stack. As
156 * long as we keep matching up child nodes with udevs, loop and search
157 * within the children of the just-found child for the next-deepest hub.
158 * If at any level we fail to find a matching node, stop searching and
159 * return. When we hit the end of the stack (the requesting device) we
160 * return whatever the result was for the search at that nesting level.
162 for (node = controller_node;;) {
163 node = find_udev_in_children(node, udev_stack[--idx]);
164 if (idx == 0 || node == -1)