usbdcore.c

F:worksip2440a board可启动u-boot-like.tar.gz F:worksip2440a board可启动u-boot-like.tar.gz

/*
 * (C) Copyright 2003
 * Gerry Hamel, [e-mail], Texas Instruments
 *
 * Based on
 * linux/drivers/usbd/usbd.c.c - USB Device Core Layer
 *
 * Copyright (c) 2000, 2001, 2002 Lineo
 * Copyright (c) 2001 Hewlett Packard
 *
 * By:
 *	Stuart Lynne <[e-mail]>,
 *	Tom Rushworth <[e-mail]>,
 *	Bruce Balden <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <malloc.h>
#include "usbdcore.h"

#define MAX_INTERFACES 2


int maxstrings = 20;

/* Global variables ************************************************************************** */

struct usb_string_descriptor **usb_strings;

int usb_devices;

extern struct usb_function_driver ep0_driver;

int registered_functions;
int registered_devices;

char *usbd_device_events[] = {
	"DEVICE_UNKNOWN",
	"DEVICE_INIT",
	"DEVICE_CREATE",
	"DEVICE_HUB_CONFIGURED",
	"DEVICE_RESET",
	"DEVICE_ADDRESS_ASSIGNED",
	"DEVICE_CONFIGURED",
	"DEVICE_SET_INTERFACE",
	"DEVICE_SET_FEATURE",
	"DEVICE_CLEAR_FEATURE",
	"DEVICE_DE_CONFIGURED",
	"DEVICE_BUS_INACTIVE",
	"DEVICE_BUS_ACTIVITY",
	"DEVICE_POWER_INTERRUPTION",
	"DEVICE_HUB_RESET",
	"DEVICE_DESTROY",
	"DEVICE_FUNCTION_PRIVATE",
};

char *usbd_device_states[] = {
	"STATE_INIT",
	"STATE_CREATED",
	"STATE_ATTACHED",
	"STATE_POWERED",
	"STATE_DEFAULT",
	"STATE_ADDRESSED",
	"STATE_CONFIGURED",
	"STATE_UNKNOWN",
};

char *usbd_device_requests[] = {
	"GET STATUS",		/* 0 */
	"CLEAR FEATURE",	/* 1 */
	"RESERVED",		/* 2 */
	"SET FEATURE",		/* 3 */
	"RESERVED",		/* 4 */
	"SET ADDRESS",		/* 5 */
	"GET DESCRIPTOR",	/* 6 */
	"SET DESCRIPTOR",	/* 7 */
	"GET CONFIGURATION",	/* 8 */
	"SET CONFIGURATION",	/* 9 */
	"GET INTERFACE",	/* 10 */
	"SET INTERFACE",	/* 11 */
	"SYNC FRAME",		/* 12 */
};

char *usbd_device_descriptors[] = {
	"UNKNOWN",		/* 0 */
	"DEVICE",		/* 1 */
	"CONFIG",		/* 2 */
	"STRING",		/* 3 */
	"INTERFACE",		/* 4 */
	"ENDPOINT",		/* 5 */
	"DEVICE QUALIFIER",	/* 6 */
	"OTHER SPEED",		/* 7 */
	"INTERFACE POWER",	/* 8 */
};

char *usbd_device_status[] = {
	"USBD_OPENING",
	"USBD_OK",
	"USBD_SUSPENDED",
	"USBD_CLOSING",
};


/* Descriptor support functions ************************************************************** */


/**
 * usbd_get_string - find and return a string descriptor
 * @index: string index to return
 *
 * Find an indexed string and return a pointer to a it.
 */
struct usb_string_descriptor *usbd_get_string (__u8 index)
{
	if (index >= maxstrings) {
		return NULL;
	}
	return usb_strings[index];
}


/* Access to device descriptor functions ***************************************************** */


/* *
 * usbd_device_configuration_instance - find a configuration instance for this device
 * @device:
 * @configuration: index to configuration, 0 - N-1
 *
 * Get specifed device configuration. Index should be bConfigurationValue-1.
 */
static struct usb_configuration_instance *usbd_device_configuration_instance (struct usb_device_instance *device,
		unsigned int port, unsigned int configuration)
{
	/* XXX */
	configuration = configuration ? configuration - 1 : 0;

	if (configuration >= device->configurations) {
		return NULL;
	}
	return device->configuration_instance_array + configuration;
}


/* *
 * usbd_device_interface_instance
 * @device:
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 *
 * Return the specified interface descriptor for the specified device.
 */
struct usb_interface_instance *usbd_device_interface_instance (struct usb_device_instance *device, int port, int configuration, int interface)
{
	struct usb_configuration_instance *configuration_instance;

	if ((configuration_instance = usbd_device_configuration_instance (device, port, configuration)) == NULL) {
		return NULL;
	}
	if (interface >= configuration_instance->interfaces) {
		return NULL;
	}
	return configuration_instance->interface_instance_array + interface;
}

/* *
 * usbd_device_alternate_descriptor_list
 * @device:
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 * @alternate: alternate setting
 *
 * Return the specified alternate descriptor for the specified device.
 */
struct usb_alternate_instance *usbd_device_alternate_instance (struct usb_device_instance *device, int port, int configuration, int interface, int alternate)
{
	struct usb_interface_instance *interface_instance;

	if ((interface_instance = usbd_device_interface_instance (device, port, configuration, interface)) == NULL) {
		return NULL;
	}

	if (alternate >= interface_instance->alternates) {
		return NULL;
	}

	return interface_instance->alternates_instance_array + alternate;
}


/* *
 * usbd_device_device_descriptor
 * @device: which device
 * @configuration: index to configuration, 0 - N-1
 * @port: which port
 *
 * Return the specified configuration descriptor for the specified device.
 */
struct usb_device_descriptor *usbd_device_device_descriptor (struct usb_device_instance *device, int port)
{
	return (device->device_descriptor);
}


/**
 * usbd_device_configuration_descriptor
 * @device: which device
 * @port: which port
 * @configuration: index to configuration, 0 - N-1
 *
 * Return the specified configuration descriptor for the specified device.
 */
struct usb_configuration_descriptor *usbd_device_configuration_descriptor (struct
									   usb_device_instance
									   *device, int port, int configuration)
{
	struct usb_configuration_instance *configuration_instance;
	if (!(configuration_instance = usbd_device_configuration_instance (device, port, configuration))) {
		return NULL;
	}
	return (configuration_instance->configuration_descriptor);
}


/**
 * usbd_device_interface_descriptor
 * @device: which device
 * @port: which port
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 * @alternate: alternate setting
 *
 * Return the specified interface descriptor for the specified device.
 */
struct usb_interface_descriptor *usbd_device_interface_descriptor (struct usb_device_instance
								   *device, int port, int configuration, int interface, int alternate)
{
	struct usb_interface_instance *interface_instance;
	if (!(interface_instance = usbd_device_interface_instance (device, port, configuration, interface))) {
		return NULL;
	}
	if ((alternate < 0) || (alternate >= interface_instance->alternates)) {
		return NULL;
	}
	return (interface_instance->alternates_instance_array[alternate].interface_descriptor);
}

/**
 * usbd_device_endpoint_descriptor_index
 * @device: which device
 * @port: which port
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 * @alternate: index setting
 * @index: which index
 *
 * Return the specified endpoint descriptor for the specified device.
 */
struct usb_endpoint_descriptor *usbd_device_endpoint_descriptor_index (struct usb_device_instance
								       *device, int port, int configuration, int interface, int alternate, int index)
{
	struct usb_alternate_instance *alternate_instance;

	if (!(alternate_instance = usbd_device_alternate_instance (device, port, configuration, interface, alternate))) {
		return NULL;
	}
	if (index >= alternate_instance->endpoints) {
		return NULL;
	}
	return *(alternate_instance->endpoints_descriptor_array + index);
}


/**
 * usbd_device_endpoint_transfersize
 * @device: which device
 * @port: which port
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 * @index: which index
 *
 * Return the specified endpoint transfer size;
 */
int usbd_device_endpoint_transfersize (struct usb_device_instance *device, int port, int configuration, int interface, int alternate, int index)
{
	struct usb_alternate_instance *alternate_instance;

	if (!(alternate_instance = usbd_device_alternate_instance (device, port, configuration, interface, alternate))) {
		return 0;
	}
	if (index >= alternate_instance->endpoints) {
		return 0;
	}
	return *(alternate_instance->endpoint_transfersize_array + index);
}


/**
 * usbd_device_endpoint_descriptor
 * @device: which device
 * @port: which port
 * @configuration: index to configuration, 0 - N-1
 * @interface: index to interface
 * @alternate: alternate setting
 * @endpoint: which endpoint
 *
 * Return the specified endpoint descriptor for the specified device.
 */
struct usb_endpoint_descriptor *usbd_device_endpoint_descriptor (struct usb_device_instance *device, int port, int configuration, int interface, int alternate, int endpoint)
{
	struct usb_endpoint_descriptor *endpoint_descriptor;
	int i;

	for (i = 0; !(endpoint_descriptor = usbd_device_endpoint_descriptor_index (device, port, configuration, interface, alternate, i)); i++) {
		if (endpoint_descriptor->bEndpointAddress == endpoint) {
			return endpoint_descriptor;
		}
	}
	return NULL;
}

/**
 * usbd_endpoint_halted
 * @device: point to struct usb_device_instance
 * @endpoint: endpoint to check
 *
 * Return non-zero if endpoint is halted.
 */
int usbd_endpoint_halted (struct usb_device_instance *device, int endpoint)