xref: /haiku/src/add-ons/kernel/busses/usb/xhci_rh.cpp (revision 6e2bbbb162987586a1df6c9d36e18493702e6ceb)

/*
 * Copyright 2011, Haiku Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Michael Lotz <mmlr@mlotz.ch>
 * 		Jian Chiang <j.jian.chiang@gmail.com>
 */


#include "xhci.h"

#define USB_MODULE_NAME "xhci roothub"

static usb_device_descriptor sXHCIRootHubDevice =
{
	18,								// Descriptor length
	USB_DESCRIPTOR_DEVICE,			// Descriptor type
	0x300,							// USB 3.0
	0x09,							// Class (9 = Hub)
	0,								// Subclass
	3,								// Protocol
	9,								// Max packet size on endpoint 0
	0,								// Vendor ID
	0,								// Product ID
	0x300,							// Version
	1,								// Index of manufacturer string
	2,								// Index of product string
	0,								// Index of serial number string
	1								// Number of configurations
};


struct xhci_root_hub_configuration_s {
	usb_configuration_descriptor	configuration;
	usb_interface_descriptor		interface;
	usb_endpoint_descriptor			endpoint;
	usb_endpoint_companion_descriptor endpc;
	usb_hub_descriptor				hub;
} _PACKED;


static xhci_root_hub_configuration_s sXHCIRootHubConfig =
{
	{ // configuration descriptor
		9,								// Descriptor length
		USB_DESCRIPTOR_CONFIGURATION,	// Descriptor type
		sizeof(sXHCIRootHubConfig),		// Total length of configuration (including
										// interface, endpoint and hub descriptors)
		1,								// Number of interfaces
		1,								// Value of this configuration
		0,								// Index of configuration string
		0x40,							// Attributes (0x40 = self powered)
		0								// Max power (0, since self powered)
	},

	{ // interface descriptor
		9,								// Descriptor length
		USB_DESCRIPTOR_INTERFACE,		// Descriptor type
		0,								// Interface number
		0,								// Alternate setting
		1,								// Number of endpoints
		0x09,							// Interface class (9 = Hub)
		0,								// Interface subclass
		0,								// Interface protocol
		0								// Index of interface string
	},

	{ // endpoint descriptor
		7,								// Descriptor length
		USB_DESCRIPTOR_ENDPOINT,		// Descriptor type
		USB_REQTYPE_DEVICE_IN | 1,		// Endpoint address (first in IN endpoint)
		0x03,							// Attributes (0x03 = interrupt endpoint)
		2,								// Max packet size
		0xff							// Interval
	},

	{ // endpoint companion descriptor
		7,
		USB_DESCRIPTOR_ENDPOINT_COMPANION,
		0,
		0,
		0
	},

	{ // hub descriptor
		9,								// Descriptor length (including
										// deprecated power control mask)
		USB_DESCRIPTOR_HUB,				// Descriptor type
		0x0f,							// Number of ports
		0x0000,							// Hub characteristics
		10,								// Power on to power good (in 2ms units)
		0,								// Maximum current (in mA)
		0x00,							// All ports are removable
		0xff							// Deprecated power control mask
	}
};


struct xhci_root_hub_string_s {
	uint8	length;
	uint8	descriptor_type;
	uint16	unicode_string[12];
} _PACKED;


static xhci_root_hub_string_s sXHCIRootHubStrings[3] = {
	{
		4,								// Descriptor length
		USB_DESCRIPTOR_STRING,			// Descriptor type
		{
			0x0409						// Supported language IDs (English US)
		}
	},

	{
		22,								// Descriptor length
		USB_DESCRIPTOR_STRING,			// Descriptor type
		{
			'H', 'A', 'I', 'K', 'U',	// Characters
			' ', 'I', 'n', 'c', '.'
		}
	},

	{
		26,								// Descriptor length
		USB_DESCRIPTOR_STRING,			// Descriptor type
		{
			'X', 'H', 'C', 'I', ' ',	// Characters
			'R', 'o', 'o', 't', 'H',
			'u', 'b'
		}
	}
};


XHCIRootHub::XHCIRootHub(Object *rootObject, int8 deviceAddress)
	:	Hub(rootObject, 0, rootObject->GetStack()->IndexOfBusManager(rootObject->GetBusManager()),
			sXHCIRootHubDevice, deviceAddress, USB_SPEED_SUPERSPEED, true)
{
}


status_t
XHCIRootHub::ProcessTransfer(XHCI *xhci, Transfer *transfer)
{
	if ((transfer->TransferPipe()->Type() & USB_OBJECT_CONTROL_PIPE) == 0)
		return B_ERROR;

	usb_request_data *request = transfer->RequestData();
	TRACE_MODULE("request: %d\n", request->Request);

	status_t status = B_TIMED_OUT;
	size_t actualLength = 0;
	switch (request->Request) {
		case USB_REQUEST_GET_STATUS: {
			if (request->Index == 0) {
				// get hub status
				actualLength = MIN(sizeof(usb_port_status),
					transfer->DataLength());
				// the hub reports whether the local power failed (bit 0)
				// and if there is a over-current condition (bit 1).
				// everything as 0 means all is ok.
				memset(transfer->Data(), 0, actualLength);
				status = B_OK;
				break;
			}

			usb_port_status portStatus;
			if (xhci->GetPortStatus(request->Index - 1, &portStatus) >= B_OK) {
				actualLength = MIN(sizeof(usb_port_status), transfer->DataLength());
				memcpy(transfer->Data(), (void *)&portStatus, actualLength);
				status = B_OK;
			}

			break;
		}

		case USB_REQUEST_SET_ADDRESS:
			if (request->Value >= 128) {
				status = B_TIMED_OUT;
				break;
			}

			TRACE_MODULE("set address: %d\n", request->Value);
			status = B_OK;
			break;

		case USB_REQUEST_GET_DESCRIPTOR:
			TRACE_MODULE("get descriptor: %d\n", request->Value >> 8);

			switch (request->Value >> 8) {
				case USB_DESCRIPTOR_DEVICE: {
					actualLength = MIN(sizeof(usb_device_descriptor),
						transfer->DataLength());
					memcpy(transfer->Data(), (void *)&sXHCIRootHubDevice,
						actualLength);
					status = B_OK;
					break;
				}

				case USB_DESCRIPTOR_CONFIGURATION: {
					actualLength = MIN(sizeof(xhci_root_hub_configuration_s),
						transfer->DataLength());
					sXHCIRootHubConfig.hub.num_ports = xhci->PortCount();
					memcpy(transfer->Data(), (void *)&sXHCIRootHubConfig,
						actualLength);
					status = B_OK;
					break;
				}

				case USB_DESCRIPTOR_STRING: {
					uint8 index = request->Value & 0x00ff;
					if (index > 2)
						break;

					actualLength = MIN(sXHCIRootHubStrings[index].length,
						transfer->DataLength());
					memcpy(transfer->Data(), (void *)&sXHCIRootHubStrings[index],
						actualLength);
					status = B_OK;
					break;
				}

				case USB_DESCRIPTOR_HUB: {
					actualLength = MIN(sizeof(usb_hub_descriptor),
						transfer->DataLength());
					sXHCIRootHubConfig.hub.num_ports = xhci->PortCount();
					memcpy(transfer->Data(), (void *)&sXHCIRootHubConfig.hub,
						actualLength);
					status = B_OK;
					break;
				}
			}
			break;

		case USB_REQUEST_SET_CONFIGURATION:
			status = B_OK;
			break;

		case USB_REQUEST_CLEAR_FEATURE: {
			if (request->Index == 0) {
				// we don't support any hub changes
				TRACE_MODULE_ERROR("clear feature: no hub changes\n");
				break;
			}

			TRACE_MODULE("clear feature: %d\n", request->Value);
			if (xhci->ClearPortFeature(request->Index - 1, request->Value) >= B_OK)
				status = B_OK;
			break;
		}

		case USB_REQUEST_SET_FEATURE: {
			if (request->Index == 0) {
				// we don't support any hub changes
				TRACE_MODULE_ERROR("set feature: no hub changes\n");
				break;
			}

			TRACE_MODULE("set feature: %d\n", request->Value);
			if (xhci->SetPortFeature(request->Index - 1, request->Value) >= B_OK)
				status = B_OK;
			break;
		}
	}

	transfer->Finished(status, actualLength);
	delete transfer;
	return B_OK;
}