545 lines
27 KiB
Zig
545 lines
27 KiB
Zig
//! /system/drivers/usb-xhci-bus — the xHCI (USB 3) host-controller bus driver.
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//! The device manager spawns **one instance per controller** it discovers (a
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//! machine can carry several), passing the controller's device-tree id as
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//! argv[1]; this instance claims that device and no other, so multiple
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//! instances never fight over hardware.
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//!
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//! M18.2 (this increment): after the hello, real hardware — map the xHC's
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//! register window (the first memory BAR; resource 0 is the ECAM config
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//! space), read the capability registers, and walk the root-hub ports: one
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//! `child_added` report to the manager per connected port, carrying the port
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//! number and the PORTSC speed class as identity. No transfer rings yet —
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//! descriptors and USB class matching are the USB track; the connect bit and
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//! speed come straight from PORTSC, which reflects hardware state whether or
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//! not the controller is running.
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const std = @import("std");
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const runtime = @import("runtime");
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const protocol = runtime.device_manager_protocol;
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const device = runtime.device;
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const usb_ids = @import("usb-ids");
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const usb_abi = @import("usb-abi");
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const transfer = @import("usb-transfer-protocol");
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const library = @import("usb-xhci-library.zig");
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/// The controller engine (reset, rings, transfers), stood up in `initialise`.
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var controller: ?library.Controller = null;
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/// This driver's service endpoint (registered as `.usb_bus`), where class-driver
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/// requests, signals, and the interrupt-poll timer all arrive.
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var service_endpoint: runtime.ipc.Handle = 0;
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/// How often the driver drains the event ring for interrupt reports (~125 Hz),
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/// re-armed each tick. Frequent enough for responsive input.
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const poll_interval_ms: u64 = 8;
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/// The class driver endpoints that opened each device, so interrupt reports can
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/// be pushed back to them. Keyed by the device token (the interface's device id).
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const Open = struct {
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used: bool = false,
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device_token: u64 = 0,
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report_endpoint: usize = 0,
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};
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var opens = [_]Open{.{}} ** 16;
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fn recordOpen(device_token: u64, report_endpoint: usize) void {
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for (&opens) |*open| {
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if (open.used and open.device_token == device_token) {
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open.report_endpoint = report_endpoint;
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return;
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}
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}
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for (&opens) |*open| {
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if (!open.used) {
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open.* = .{ .used = true, .device_token = device_token, .report_endpoint = report_endpoint };
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return;
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}
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}
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}
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fn reportEndpointFor(device_token: u64) ?usize {
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for (&opens) |*open| {
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if (open.used and open.device_token == device_token) return open.report_endpoint;
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}
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return null;
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}
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var controller_id: u64 = protocol.no_device;
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/// Claim the assigned controller, find its register window, and hello the
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/// manager. Any failure returns false: the process exits cleanly, which the
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/// manager reads as "meant to stop" — a missing assignment is not a crash loop.
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fn initialise(endpoint: runtime.ipc.Handle) bool {
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service_endpoint = endpoint;
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if (!device.claim(controller_id)) {
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std.log.info("unable to claim controller device {d}", .{controller_id});
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return false;
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}
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// Fetch our own descriptor back for the controller's resources.
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const buffer = runtime.allocator().alloc(device.DeviceDescriptor, 64) catch {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: out of memory\n");
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return false;
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};
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const total = device.enumerate(buffer);
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const descriptor = for (buffer[0..@min(total, buffer.len)]) |d| {
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if (d.id == controller_id) break d;
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} else {
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std.log.info("device {d} not in the device tree", .{controller_id});
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return false;
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};
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// The xHC's registers live behind the first memory BAR. Resource 0 is the
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// function's ECAM configuration space (M15), so the walk starts at 1.
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var register_index: u64 = 0;
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const register_window = for (descriptor.resources[1..@intCast(descriptor.resource_count)], 1..) |resource, index| {
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if (resource.kind == @intFromEnum(device.ResourceKind.memory)) {
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register_index = index;
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break resource;
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}
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} else {
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std.log.info("controller device {d} has no register BAR", .{controller_id});
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return false;
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};
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std.log.info("claimed controller device {d} (registers at 0x{x}, {d} bytes)", .{
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controller_id,
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register_window.start,
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register_window.len,
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});
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register_base = device.mmioMap(controller_id, register_index) orelse {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: mmio_map failed\n");
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return false;
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};
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// Bring the controller up: reset it, stand up the command and event rings,
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// and start it running (the hardware half lives in usb-xhci-library.zig).
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controller = library.Controller.init(register_base) orelse {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: controller reset/bring-up failed\n");
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return false;
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};
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std.log.info("controller running ({d} slots, {d}-byte contexts)", .{
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controller.?.max_slots,
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controller.?.context_size,
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});
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// The proof of life: a No-Op command round-trips the command ring, the event
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// ring, the doorbell, and the cycle-bit bookkeeping. If this completes, the
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// engine is sound; transfers build on exactly this machinery.
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if (controller.?.noOpCommand()) {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: command ring running (no-op ok)\n");
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} else {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: no-op command did not complete\n");
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return false;
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}
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// The handshake: role, protocol version, assignment — inside the manager's
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// deadline (the lookup retries cover the manager still registering).
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var manager: ?runtime.ipc.Handle = null;
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var tries: u32 = 0;
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while (manager == null and tries < 100) : (tries += 1) {
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manager = runtime.ipc.lookup(.device_manager);
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if (manager == null) runtime.system.sleep(20);
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}
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const h = manager orelse {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: no device manager to hello\n");
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return false;
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};
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manager_handle = h; // the tick's hot-plug dispatch reports through this
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const hello = protocol.Hello{ .role = @intFromEnum(protocol.Role.bus), .device_id = controller_id };
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var reply: [protocol.message_maximum]u8 = undefined;
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const n = runtime.ipc.call(h, std.mem.asBytes(&hello), &reply) catch {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: hello call failed\n");
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return false;
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};
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if (n < protocol.reply_size or std.mem.bytesToValue(protocol.HelloReply, reply[0..protocol.reply_size]).status != 0) {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: hello refused\n");
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return false;
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}
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: hello acknowledged\n");
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scanPorts(h);
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// Arm the poll timer that drains interrupt reports from the event ring. It is
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// re-armed on each tick in onNotification; class drivers subscribe later.
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_ = runtime.system.timerOnce(service_endpoint, poll_interval_ms);
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return true;
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}
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var register_base: usize = 0;
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/// The xHCI default Protocol Speed IDs (the PORTSC port-speed field, bits 13:10)
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/// decoded to human names — the boot-log breadcrumb for what actually enumerated on
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/// a port, the USB analog of the pci-bus class-code line. A controller may redefine
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/// these through its Supported Protocol capability, but the defaults cover every
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/// speed QEMU and real hardware report at this (pre-descriptor) stage.
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fn speedName(speed: u32) []const u8 {
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return switch (speed) {
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1 => "Full-speed (USB 2.0, 12 Mb/s)",
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2 => "Low-speed (USB 2.0, 1.5 Mb/s)",
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3 => "High-speed (USB 2.0, 480 Mb/s)",
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4 => "SuperSpeed (USB 3.0, 5 Gb/s)",
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5 => "SuperSpeedPlus (USB 3.1, 10 Gb/s)",
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else => "unknown speed",
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};
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}
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/// The root-hub scan and enumeration: for each connected port, bring the device
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/// up (reset → enable slot → address), read its descriptors, and register +
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/// report one child per interface — carrying the interface's (class, subclass,
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/// protocol) triple as identity, which is what the device manager matches a
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/// class driver against.
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var manager_handle: ?runtime.ipc.Handle = null;
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fn scanPorts(manager: runtime.ipc.Handle) void {
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const engine = if (controller) |*c| c else {
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_ = runtime.system.write("/system/drivers/usb-xhci-bus: controller not initialised\n");
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return;
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};
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std.log.info("{d} root-hub ports", .{engine.max_ports});
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var port: u32 = 1;
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var connected: u32 = 0;
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while (port <= engine.max_ports) : (port += 1) {
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if (!engine.portConnected(port)) continue;
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connected += 1;
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bringUpPort(manager, engine, port);
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}
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if (connected == 0) _ = runtime.system.write("/system/drivers/usb-xhci-bus: no devices connected\n");
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}
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/// Bring up whatever is on `port`: setup + enumerate + register/report one child
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/// per interface. Shared by the boot scan and hot-plug (a port-change event with
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/// the port now connected).
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fn bringUpPort(manager: runtime.ipc.Handle, engine: *library.Controller, port: u32) void {
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const speed = (engine.portStatus(port) >> 10) & 0xF; // the PORTSC port-speed class
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std.log.info("port {d} connected — {s} (speed class {d})", .{ port, speedName(speed), speed });
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const usb_device = engine.setupDevice(port, speed) orelse {
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std.log.info("port {d} device setup failed", .{port});
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return;
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};
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if (!engine.enumerate(usb_device)) {
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std.log.info("port {d} enumeration failed", .{port});
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return;
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}
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std.log.info("port {d} device vendor 0x{x:0>4} product 0x{x:0>4}, {d} interface(s)", .{
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port,
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usb_device.device_descriptor.vendor_id,
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usb_device.device_descriptor.product_id,
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usb_device.interface_count,
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});
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for (usb_device.interfaces[0..usb_device.interface_count]) |*interface| {
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// Record the id each interface was registered as, so a class driver
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// opening the interface (by that id) resolves to it.
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if (reportInterface(manager, port, interface.*)) |registered| {
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interface.registered_device_id = registered;
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}
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}
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// A hub (class 9) is bus infrastructure the bus drives itself: configure it
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// and power its downstream ports (docs/usb-hub.md). Its interfaces are still
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// reported above, but no external class driver binds it.
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if (deviceIsHub(usb_device)) _ = engine.setupHub(usb_device);
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}
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// A compact topology-unique port key for a hub downstream port: 1000 + slot*100
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// + port. Stays a few digits (the id tag "P<key>I<iface>" has an 8-byte cap)
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// while never colliding with a root port (1..N) or another (hub, port).
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fn hubPortKey(hub_slot: u8, port: u16) u32 {
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return 1000 + @as(u32, hub_slot) * 100 + port;
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}
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/// Service a change on hub downstream `port`: dispatch a connect (enumerate the
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/// new device) or a disconnect (tear the old one down). Recurses for a hub
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/// behind a hub — a nested hub is set up on connect and its downstream devices
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/// torn down first on disconnect.
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fn bringUpBehindHub(manager: runtime.ipc.Handle, engine: *library.Controller, hub: *library.Device, port: u16) void {
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const status = engine.hubPortStatusAck(hub, port) orelse return;
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const connected = library.Controller.hubPortConnected(status);
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std.log.info("hub slot {d} port {d} status 0x{x:0>8} ({s})", .{ hub.slot_id, port, status, if (connected) "connected" else "empty" });
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const existing = engine.deviceOnHubPort(hub, port);
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if (!connected) {
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if (existing) |dev| tearDownHubDevice(manager, engine, dev);
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return;
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}
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if (existing != null) return; // already up
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const usb_device = engine.serviceHubPort(hub, port) orelse return;
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if (!engine.enumerate(usb_device)) {
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std.log.info("hub slot {d} port {d}: enumeration failed", .{ hub.slot_id, port });
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return;
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}
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std.log.info("hub slot {d} port {d} device vendor 0x{x:0>4} product 0x{x:0>4}, {d} interface(s)", .{
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hub.slot_id, port,
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usb_device.device_descriptor.vendor_id,
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usb_device.device_descriptor.product_id,
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usb_device.interface_count,
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});
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for (usb_device.interfaces[0..usb_device.interface_count]) |*interface| {
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if (reportInterface(manager, hubPortKey(hub.slot_id, port), interface.*)) |registered| {
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interface.registered_device_id = registered;
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}
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}
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if (deviceIsHub(usb_device)) _ = engine.setupHub(usb_device);
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}
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/// Tear down a device that disconnected from a hub: recursively tear down its
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/// own downstream devices first if it is a hub, report each interface removed,
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/// then Disable Slot. Mirrors tearDownPort for a hub-attached device.
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fn tearDownHubDevice(manager: runtime.ipc.Handle, engine: *library.Controller, dev: *library.Device) void {
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// A hub that left takes its whole subtree with it — tear children down first.
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if (dev.is_hub) {
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while (engine.nextChildOf(dev.slot_id, 0)) |child| tearDownHubDevice(manager, engine, child);
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}
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std.log.info("hub device slot {d} disconnected", .{dev.slot_id});
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const key = hubPortKey(dev.parent_slot, dev.parent_port);
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for (dev.interfaces[0..dev.interface_count]) |*interface| {
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if (interface.registered_device_id == 0) continue;
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const event = protocol.ChildRemoved{
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.parent = controller_id,
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.bus_address = (@as(u64, key) << 8) | interface.number,
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};
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var reply: [protocol.message_maximum]u8 = undefined;
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_ = runtime.ipc.call(manager, std.mem.asBytes(&event), &reply) catch {};
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interface.registered_device_id = 0;
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}
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engine.tearDownDevice(dev);
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}
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/// Whether an enumerated device is a hub — class 9 at the device or the
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/// interface level (a hub's single interface is class 9/0/0).
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fn deviceIsHub(usb_device: *const library.Device) bool {
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if (usb_device.device_descriptor.device_class == @intFromEnum(usb_ids.Class.hub)) return true;
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for (usb_device.interfaces[0..usb_device.interface_count]) |interface| {
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if (interface.class == @intFromEnum(usb_ids.Class.hub)) return true;
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}
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return false;
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}
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/// Tear down whatever was on `port` after an unplug: report each registered
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/// interface as removed (the manager prunes the node, notifies watchers, and
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/// stops the class driver's world honestly), then release the controller-side
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/// device state (Disable Slot).
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fn tearDownPort(manager: runtime.ipc.Handle, engine: *library.Controller, port: u32) void {
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const usb_device = engine.deviceOnPort(port) orelse return;
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std.log.info("port {d} disconnected", .{port});
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for (usb_device.interfaces[0..usb_device.interface_count]) |*interface| {
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if (interface.registered_device_id == 0) continue;
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const event = protocol.ChildRemoved{
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.parent = controller_id,
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.bus_address = (@as(u64, port) << 8) | interface.number,
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};
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var reply: [protocol.message_maximum]u8 = undefined;
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_ = runtime.ipc.call(manager, std.mem.asBytes(&event), &reply) catch {
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std.log.info("child-removed report for port {d} interface {d} failed", .{ port, interface.number });
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};
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interface.registered_device_id = 0;
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}
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engine.tearDownDevice(usb_device);
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}
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/// Register one interface as a resource-less child of the controller and report
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/// it to the device manager. The identity is the packed USB class triple, so the
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/// manager can match a class driver (HID keyboard, mouse, mass storage); the
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/// registered device id becomes that driver's argv[1] assignment. Returns the
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/// registered device id, or null if registration or the report failed.
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fn reportInterface(manager: runtime.ipc.Handle, port: u32, interface: library.InterfaceInfo) ?u64 {
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const identity = usb_ids.packTriple(interface.class, interface.subclass, interface.protocol);
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// A USB device is reached through its controller, not by MMIO, so the child
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// carries no resources; register() allows that. Its bus-local identity — the
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// (port, interface) address, written as a short "P<port>I<interface>" tag in
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// the hid field — makes each interface a distinct kernel node (the register
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// dedup keys on class/pci_class/hid/resources, all otherwise identical here)
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// and keeps re-registration idempotent across a bus restart: the same port
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// and interface always map back to the same device id.
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var descriptor = std.mem.zeroes(device.DeviceDescriptor);
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descriptor.class = @intFromEnum(device.DeviceClass.usb_device);
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descriptor.pci_class = device.no_pci_class;
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descriptor.resource_count = 0;
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var hid_buffer: [8]u8 = undefined;
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const hid_text = std.fmt.bufPrint(&hid_buffer, "P{d}I{d}", .{ port, interface.number }) catch "";
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descriptor.hid_len = hid_text.len;
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@memcpy(descriptor.hid[0..hid_text.len], hid_text);
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const registered = device.register(controller_id, &descriptor) orelse {
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std.log.info("register refused for port {d} interface {d}", .{ port, interface.number });
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return null;
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};
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const report = protocol.ChildAdded{
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.parent = controller_id,
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.bus_address = (@as(u64, port) << 8) | interface.number,
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.identity = identity,
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.device_id = registered,
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};
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var reply: [protocol.message_maximum]u8 = undefined;
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_ = runtime.ipc.call(manager, std.mem.asBytes(&report), &reply) catch {
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std.log.info("child report for port {d} interface {d} failed", .{ port, interface.number });
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return null;
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};
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std.log.info("port {d} interface {d} class {d}/{d}/{d} registered as device {d}", .{
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port,
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interface.number,
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interface.class,
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interface.subclass,
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interface.protocol,
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registered,
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});
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return registered;
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}
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/// Serve the USB transfer protocol: a class driver opens its device, then issues
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/// control / interrupt-subscribe / bulk requests against it.
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fn onMessage(message: []const u8, reply: []u8, sender: u32, capability: ?runtime.ipc.Handle) usize {
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_ = sender;
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if (message.len < 4) return 0;
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const operation = std.mem.readInt(u32, message[0..4], .little);
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return switch (operation) {
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@intFromEnum(transfer.Operation.open) => handleOpen(message, reply, capability),
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@intFromEnum(transfer.Operation.control) => handleControl(message, reply),
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@intFromEnum(transfer.Operation.interrupt_subscribe) => handleSubscribe(message, reply),
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@intFromEnum(transfer.Operation.bulk) => handleBulk(message, reply),
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else => 0,
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};
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}
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fn writeReply(reply: []u8, value: anytype) usize {
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const bytes = std.mem.asBytes(&value);
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@memcpy(reply[0..bytes.len], bytes);
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return bytes.len;
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}
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/// open: resolve the assigned device id to an interface, remember the caller's
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/// endpoint (for interrupt reports), and answer with a device token + the
|
|
/// interface's endpoints so the class driver need not re-read the config.
|
|
fn handleOpen(message: []const u8, reply: []u8, capability: ?runtime.ipc.Handle) usize {
|
|
if (message.len < @sizeOf(transfer.OpenRequest)) return writeReply(reply, transfer.OpenReply{ .status = -1, .endpoint_count = 0, .device_token = 0, .interface_class = 0, .interface_subclass = 0, .interface_protocol = 0, .interface_number = 0 });
|
|
const request = std.mem.bytesToValue(transfer.OpenRequest, message[0..@sizeOf(transfer.OpenRequest)]);
|
|
const engine = if (controller) |*c| c else return writeReply(reply, transfer.OpenReply{ .status = -1, .endpoint_count = 0, .device_token = 0, .interface_class = 0, .interface_subclass = 0, .interface_protocol = 0, .interface_number = 0 });
|
|
const found = engine.findInterface(request.device_id) orelse return writeReply(reply, transfer.OpenReply{ .status = -1, .endpoint_count = 0, .device_token = 0, .interface_class = 0, .interface_subclass = 0, .interface_protocol = 0, .interface_number = 0 });
|
|
|
|
if (capability) |endpoint| recordOpen(request.device_id, endpoint);
|
|
|
|
var open_reply = transfer.OpenReply{
|
|
.status = 0,
|
|
.endpoint_count = found.interface.endpoint_count,
|
|
.device_token = request.device_id,
|
|
.interface_class = found.interface.class,
|
|
.interface_subclass = found.interface.subclass,
|
|
.interface_protocol = found.interface.protocol,
|
|
.interface_number = found.interface.number,
|
|
};
|
|
const count = @min(found.interface.endpoint_count, transfer.max_reported_endpoints);
|
|
for (found.interface.endpoints[0..count], 0..) |endpoint, index| {
|
|
open_reply.endpoints[index] = .{
|
|
.address = endpoint.address,
|
|
.transfer_type = endpoint.transfer_type,
|
|
.max_packet_size = endpoint.max_packet_size,
|
|
.interval = endpoint.interval,
|
|
};
|
|
}
|
|
return writeReply(reply, open_reply);
|
|
}
|
|
|
|
/// control: one EP0 control transfer, small data inline both ways.
|
|
fn handleControl(message: []const u8, reply: []u8) usize {
|
|
if (message.len < @sizeOf(transfer.ControlRequest)) return writeReply(reply, transfer.ControlReply{ .status = -1, .actual_length = 0 });
|
|
const request = std.mem.bytesToValue(transfer.ControlRequest, message[0..@sizeOf(transfer.ControlRequest)]);
|
|
const engine = if (controller) |*c| c else return writeReply(reply, transfer.ControlReply{ .status = -1, .actual_length = 0 });
|
|
const found = engine.findInterface(request.device_token) orelse return writeReply(reply, transfer.ControlReply{ .status = -1, .actual_length = 0 });
|
|
|
|
const setup = std.mem.bytesToValue(usb_abi.Request, &request.setup);
|
|
const direction_in = request.direction_in != 0;
|
|
const data_length = @min(request.data_length, transfer.max_inline_data);
|
|
var data: [transfer.max_inline_data]u8 = undefined;
|
|
if (!direction_in) @memcpy(data[0..data_length], request.data[0..data_length]);
|
|
|
|
const ok = engine.controlTransfer(found.device, setup, data[0..data_length], direction_in);
|
|
var control_reply = transfer.ControlReply{ .status = if (ok) 0 else -1, .actual_length = if (ok) data_length else 0 };
|
|
if (ok and direction_in) @memcpy(control_reply.data[0..data_length], data[0..data_length]);
|
|
return writeReply(reply, control_reply);
|
|
}
|
|
|
|
/// interrupt_subscribe: arm periodic IN polling; reports flow back asynchronously.
|
|
fn handleSubscribe(message: []const u8, reply: []u8) usize {
|
|
if (message.len < @sizeOf(transfer.InterruptSubscribeRequest)) return writeReply(reply, transfer.InterruptSubscribeReply{ .status = -1 });
|
|
const request = std.mem.bytesToValue(transfer.InterruptSubscribeRequest, message[0..@sizeOf(transfer.InterruptSubscribeRequest)]);
|
|
const engine = if (controller) |*c| c else return writeReply(reply, transfer.InterruptSubscribeReply{ .status = -1 });
|
|
const found = engine.findInterface(request.device_token) orelse return writeReply(reply, transfer.InterruptSubscribeReply{ .status = -1 });
|
|
const endpoint = library.Controller.endpointForAddress(found.interface, request.endpoint_address) orelse return writeReply(reply, transfer.InterruptSubscribeReply{ .status = -1 });
|
|
const report_endpoint = reportEndpointFor(request.device_token) orelse return writeReply(reply, transfer.InterruptSubscribeReply{ .status = -1 });
|
|
const ok = engine.subscribeInterrupt(found.device, endpoint, request.device_token, report_endpoint);
|
|
return writeReply(reply, transfer.InterruptSubscribeReply{ .status = if (ok) 0 else -1 });
|
|
}
|
|
|
|
/// bulk: one bulk transfer to/from the class driver's own DMA buffer (by physical
|
|
/// address), so sector-sized data never crosses IPC.
|
|
fn handleBulk(message: []const u8, reply: []u8) usize {
|
|
if (message.len < @sizeOf(transfer.BulkRequest)) return writeReply(reply, transfer.BulkReply{ .status = -1, .actual_length = 0 });
|
|
const request = std.mem.bytesToValue(transfer.BulkRequest, message[0..@sizeOf(transfer.BulkRequest)]);
|
|
const engine = if (controller) |*c| c else return writeReply(reply, transfer.BulkReply{ .status = -1, .actual_length = 0 });
|
|
const found = engine.findInterface(request.device_token) orelse return writeReply(reply, transfer.BulkReply{ .status = -1, .actual_length = 0 });
|
|
const endpoint = library.Controller.endpointForAddress(found.interface, request.endpoint_address) orelse return writeReply(reply, transfer.BulkReply{ .status = -1, .actual_length = 0 });
|
|
const transferred = engine.bulkTransfer(found.device, endpoint, request.physical_address, request.length);
|
|
return writeReply(reply, transfer.BulkReply{ .status = if (transferred != null) 0 else -1, .actual_length = transferred orelse 0 });
|
|
}
|
|
|
|
/// The poll timer landed: drain any interrupt reports off the event ring and push
|
|
/// each to the class driver that subscribed, then re-arm the timer.
|
|
fn onNotification(badge: u64) void {
|
|
if (badge & runtime.ipc.notify_timer_bit == 0) return;
|
|
if (controller) |*engine| {
|
|
engine.pump();
|
|
while (engine.takePortChange()) |port| {
|
|
const manager = manager_handle orelse break;
|
|
if (engine.portConnected(port)) {
|
|
if (engine.deviceOnPort(port) == null) bringUpPort(manager, engine, port);
|
|
} else {
|
|
tearDownPort(manager, engine, port);
|
|
}
|
|
}
|
|
// Downstream hub-port changes (docs/usb-hub.md): a device connected on a
|
|
// hub's downstream port is enumerated and registered here, so a keyboard
|
|
// behind a hub reaches its class driver like one on a root port.
|
|
// Cap per tick: even if a hub's change bits refuse to clear, the driver
|
|
// must not spin here — it services a bounded batch and yields to the
|
|
// next tick (and to storage, input, everything else).
|
|
var serviced: u32 = 0;
|
|
while (engine.takeHubChange()) |change| {
|
|
const manager = manager_handle orelse break;
|
|
bringUpBehindHub(manager, engine, change.hub, change.port);
|
|
serviced += 1;
|
|
if (serviced >= 32) break;
|
|
}
|
|
while (engine.takeReport()) |report| {
|
|
var message = transfer.InterruptReport{
|
|
.device_token = report.device_token,
|
|
.endpoint_address = report.endpoint_address,
|
|
.length = @intCast(@min(report.length, transfer.max_report_data)),
|
|
};
|
|
const n = @min(report.length, transfer.max_report_data);
|
|
@memcpy(message.data[0..n], report.data[0..n]);
|
|
_ = runtime.ipc.send(report.report_endpoint, std.mem.asBytes(&message));
|
|
}
|
|
}
|
|
_ = runtime.system.timerOnce(service_endpoint, poll_interval_ms);
|
|
}
|
|
|
|
pub fn main(init: runtime.process.Init) void {
|
|
const argument = init.arguments.get(1) orelse {
|
|
_ = runtime.system.write("/system/drivers/usb-xhci-bus: missing controller device id (argv[1])\n");
|
|
return;
|
|
};
|
|
controller_id = std.fmt.parseInt(u64, argument, 10) catch {
|
|
std.log.info("malformed controller device id '{s}'", .{argument});
|
|
return;
|
|
};
|
|
runtime.service.run(transfer.message_maximum, .{
|
|
.service = .usb_bus,
|
|
.init = initialise,
|
|
.on_message = onMessage,
|
|
.on_notification = onNotification,
|
|
});
|
|
}
|