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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
669 lines
16 KiB
C
669 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2003
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* Gerry Hamel, geh@ti.com, Texas Instruments
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*
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* Based on
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* linux/drivers/usbd/usbd.c.c - USB Device Core Layer
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*
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* Copyright (c) 2000, 2001, 2002 Lineo
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* Copyright (c) 2001 Hewlett Packard
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*
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* By:
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* Stuart Lynne <sl@lineo.com>,
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* Tom Rushworth <tbr@lineo.com>,
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* Bruce Balden <balden@lineo.com>
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*/
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#include <malloc.h>
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#include <usbdevice.h>
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#define MAX_INTERFACES 2
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int maxstrings = 20;
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/* Global variables ************************************************************************** */
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struct usb_string_descriptor **usb_strings;
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int usb_devices;
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extern struct usb_function_driver ep0_driver;
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int registered_functions;
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int registered_devices;
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char *usbd_device_events[] = {
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"DEVICE_UNKNOWN",
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"DEVICE_INIT",
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"DEVICE_CREATE",
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"DEVICE_HUB_CONFIGURED",
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"DEVICE_RESET",
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"DEVICE_ADDRESS_ASSIGNED",
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"DEVICE_CONFIGURED",
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"DEVICE_SET_INTERFACE",
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"DEVICE_SET_FEATURE",
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"DEVICE_CLEAR_FEATURE",
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"DEVICE_DE_CONFIGURED",
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"DEVICE_BUS_INACTIVE",
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"DEVICE_BUS_ACTIVITY",
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"DEVICE_POWER_INTERRUPTION",
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"DEVICE_HUB_RESET",
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"DEVICE_DESTROY",
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"DEVICE_FUNCTION_PRIVATE",
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};
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char *usbd_device_states[] = {
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"STATE_INIT",
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"STATE_CREATED",
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"STATE_ATTACHED",
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"STATE_POWERED",
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"STATE_DEFAULT",
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"STATE_ADDRESSED",
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"STATE_CONFIGURED",
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"STATE_UNKNOWN",
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};
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char *usbd_device_requests[] = {
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"GET STATUS", /* 0 */
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"CLEAR FEATURE", /* 1 */
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"RESERVED", /* 2 */
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"SET FEATURE", /* 3 */
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"RESERVED", /* 4 */
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"SET ADDRESS", /* 5 */
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"GET DESCRIPTOR", /* 6 */
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"SET DESCRIPTOR", /* 7 */
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"GET CONFIGURATION", /* 8 */
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"SET CONFIGURATION", /* 9 */
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"GET INTERFACE", /* 10 */
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"SET INTERFACE", /* 11 */
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"SYNC FRAME", /* 12 */
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};
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char *usbd_device_descriptors[] = {
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"UNKNOWN", /* 0 */
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"DEVICE", /* 1 */
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"CONFIG", /* 2 */
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"STRING", /* 3 */
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"INTERFACE", /* 4 */
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"ENDPOINT", /* 5 */
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"DEVICE QUALIFIER", /* 6 */
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"OTHER SPEED", /* 7 */
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"INTERFACE POWER", /* 8 */
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};
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char *usbd_device_status[] = {
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"USBD_OPENING",
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"USBD_OK",
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"USBD_SUSPENDED",
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"USBD_CLOSING",
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};
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/* Descriptor support functions ************************************************************** */
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/**
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* usbd_get_string - find and return a string descriptor
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* @index: string index to return
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*
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* Find an indexed string and return a pointer to a it.
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*/
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struct usb_string_descriptor *usbd_get_string (__u8 index)
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{
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if (index >= maxstrings) {
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return NULL;
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}
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return usb_strings[index];
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}
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/* Access to device descriptor functions ***************************************************** */
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/* *
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* usbd_device_configuration_instance - find a configuration instance for this device
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* @device:
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* @configuration: index to configuration, 0 - N-1
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*
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* Get specifed device configuration. Index should be bConfigurationValue-1.
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*/
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static struct usb_configuration_instance *usbd_device_configuration_instance (struct usb_device_instance *device,
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unsigned int port, unsigned int configuration)
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{
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if (configuration >= device->configurations)
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return NULL;
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return device->configuration_instance_array + configuration;
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}
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/* *
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* usbd_device_interface_instance
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* @device:
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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*
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* Return the specified interface descriptor for the specified device.
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*/
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struct usb_interface_instance *usbd_device_interface_instance (struct usb_device_instance *device, int port, int configuration, int interface)
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{
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struct usb_configuration_instance *configuration_instance;
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if ((configuration_instance = usbd_device_configuration_instance (device, port, configuration)) == NULL) {
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return NULL;
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}
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if (interface >= configuration_instance->interfaces) {
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return NULL;
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}
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return configuration_instance->interface_instance_array + interface;
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}
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/* *
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* usbd_device_alternate_descriptor_list
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* @device:
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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* @alternate: alternate setting
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*
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* Return the specified alternate descriptor for the specified device.
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*/
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struct usb_alternate_instance *usbd_device_alternate_instance (struct usb_device_instance *device, int port, int configuration, int interface, int alternate)
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{
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struct usb_interface_instance *interface_instance;
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if ((interface_instance = usbd_device_interface_instance (device, port, configuration, interface)) == NULL) {
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return NULL;
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}
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if (alternate >= interface_instance->alternates) {
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return NULL;
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}
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return interface_instance->alternates_instance_array + alternate;
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}
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/* *
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* usbd_device_device_descriptor
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* @device: which device
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* @configuration: index to configuration, 0 - N-1
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* @port: which port
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*
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* Return the specified configuration descriptor for the specified device.
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*/
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struct usb_device_descriptor *usbd_device_device_descriptor (struct usb_device_instance *device, int port)
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{
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return (device->device_descriptor);
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}
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/**
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* usbd_device_configuration_descriptor
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* @device: which device
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* @port: which port
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* @configuration: index to configuration, 0 - N-1
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*
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* Return the specified configuration descriptor for the specified device.
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*/
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struct usb_configuration_descriptor *usbd_device_configuration_descriptor (struct
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usb_device_instance
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*device, int port, int configuration)
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{
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struct usb_configuration_instance *configuration_instance;
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if (!(configuration_instance = usbd_device_configuration_instance (device, port, configuration))) {
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return NULL;
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}
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return (configuration_instance->configuration_descriptor);
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}
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/**
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* usbd_device_interface_descriptor
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* @device: which device
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* @port: which port
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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* @alternate: alternate setting
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*
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* Return the specified interface descriptor for the specified device.
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*/
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struct usb_interface_descriptor *usbd_device_interface_descriptor (struct usb_device_instance
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*device, int port, int configuration, int interface, int alternate)
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{
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struct usb_interface_instance *interface_instance;
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if (!(interface_instance = usbd_device_interface_instance (device, port, configuration, interface))) {
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return NULL;
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}
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if ((alternate < 0) || (alternate >= interface_instance->alternates)) {
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return NULL;
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}
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return (interface_instance->alternates_instance_array[alternate].interface_descriptor);
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}
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/**
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* usbd_device_endpoint_descriptor_index
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* @device: which device
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* @port: which port
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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* @alternate: index setting
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* @index: which index
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*
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* Return the specified endpoint descriptor for the specified device.
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*/
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struct usb_endpoint_descriptor *usbd_device_endpoint_descriptor_index (struct usb_device_instance
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*device, int port, int configuration, int interface, int alternate, int index)
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{
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struct usb_alternate_instance *alternate_instance;
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if (!(alternate_instance = usbd_device_alternate_instance (device, port, configuration, interface, alternate))) {
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return NULL;
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}
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if (index >= alternate_instance->endpoints) {
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return NULL;
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}
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return *(alternate_instance->endpoints_descriptor_array + index);
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}
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/**
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* usbd_device_endpoint_transfersize
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* @device: which device
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* @port: which port
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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* @index: which index
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*
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* Return the specified endpoint transfer size;
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*/
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int usbd_device_endpoint_transfersize (struct usb_device_instance *device, int port, int configuration, int interface, int alternate, int index)
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{
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struct usb_alternate_instance *alternate_instance;
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if (!(alternate_instance = usbd_device_alternate_instance (device, port, configuration, interface, alternate))) {
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return 0;
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}
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if (index >= alternate_instance->endpoints) {
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return 0;
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}
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return *(alternate_instance->endpoint_transfersize_array + index);
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}
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/**
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* usbd_device_endpoint_descriptor
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* @device: which device
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* @port: which port
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* @configuration: index to configuration, 0 - N-1
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* @interface: index to interface
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* @alternate: alternate setting
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* @endpoint: which endpoint
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*
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* Return the specified endpoint descriptor for the specified device.
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*/
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struct usb_endpoint_descriptor *usbd_device_endpoint_descriptor (struct usb_device_instance *device, int port, int configuration, int interface, int alternate, int endpoint)
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{
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struct usb_endpoint_descriptor *endpoint_descriptor;
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int i;
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for (i = 0; !(endpoint_descriptor = usbd_device_endpoint_descriptor_index (device, port, configuration, interface, alternate, i)); i++) {
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if (endpoint_descriptor->bEndpointAddress == endpoint) {
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return endpoint_descriptor;
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}
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}
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return NULL;
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}
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/**
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* usbd_endpoint_halted
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* @device: point to struct usb_device_instance
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* @endpoint: endpoint to check
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*
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* Return non-zero if endpoint is halted.
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*/
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int usbd_endpoint_halted (struct usb_device_instance *device, int endpoint)
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{
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return (device->status == USB_STATUS_HALT);
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}
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/**
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* usbd_rcv_complete - complete a receive
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* @endpoint:
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* @len:
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* @urb_bad:
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*
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* Called from rcv interrupt to complete.
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*/
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void usbd_rcv_complete(struct usb_endpoint_instance *endpoint, int len, int urb_bad)
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{
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if (endpoint) {
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struct urb *rcv_urb;
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/*usbdbg("len: %d urb: %p\n", len, endpoint->rcv_urb); */
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/* if we had an urb then update actual_length, dispatch if neccessary */
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if ((rcv_urb = endpoint->rcv_urb)) {
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/*usbdbg("actual: %d buffer: %d\n", */
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/*rcv_urb->actual_length, rcv_urb->buffer_length); */
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/* check the urb is ok, are we adding data less than the packetsize */
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if (!urb_bad && (len <= endpoint->rcv_packetSize)) {
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/*usbdbg("updating actual_length by %d\n",len); */
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/* increment the received data size */
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rcv_urb->actual_length += len;
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} else {
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usberr(" RECV_ERROR actual: %d buffer: %d urb_bad: %d\n",
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rcv_urb->actual_length, rcv_urb->buffer_length, urb_bad);
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rcv_urb->actual_length = 0;
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rcv_urb->status = RECV_ERROR;
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}
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} else {
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usberr("no rcv_urb!");
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}
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} else {
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usberr("no endpoint!");
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}
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}
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/**
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* usbd_tx_complete - complete a transmit
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* @endpoint:
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* @resetart:
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*
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* Called from tx interrupt to complete.
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*/
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void usbd_tx_complete (struct usb_endpoint_instance *endpoint)
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{
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if (endpoint) {
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struct urb *tx_urb;
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/* if we have a tx_urb advance or reset, finish if complete */
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if ((tx_urb = endpoint->tx_urb)) {
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int sent = endpoint->last;
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endpoint->sent += sent;
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endpoint->last -= sent;
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if( (endpoint->tx_urb->actual_length - endpoint->sent) <= 0 ) {
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tx_urb->actual_length = 0;
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endpoint->sent = 0;
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endpoint->last = 0;
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/* Remove from active, save for re-use */
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urb_detach(tx_urb);
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urb_append(&endpoint->done, tx_urb);
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/*usbdbg("done->next %p, tx_urb %p, done %p", */
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/* endpoint->done.next, tx_urb, &endpoint->done); */
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endpoint->tx_urb = first_urb_detached(&endpoint->tx);
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if( endpoint->tx_urb ) {
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endpoint->tx_queue--;
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usbdbg("got urb from tx list");
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}
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if( !endpoint->tx_urb ) {
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/*usbdbg("taking urb from done list"); */
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endpoint->tx_urb = first_urb_detached(&endpoint->done);
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}
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if( !endpoint->tx_urb ) {
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usbdbg("allocating new urb for tx_urb");
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endpoint->tx_urb = usbd_alloc_urb(tx_urb->device, endpoint);
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}
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}
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}
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}
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}
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/* URB linked list functions ***************************************************** */
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/*
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* Initialize an urb_link to be a single element list.
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* If the urb_link is being used as a distinguished list head
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* the list is empty when the head is the only link in the list.
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*/
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void urb_link_init (urb_link * ul)
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{
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if (ul) {
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ul->prev = ul->next = ul;
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}
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}
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/*
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* Detach an urb_link from a list, and set it
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* up as a single element list, so no dangling
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* pointers can be followed, and so it can be
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* joined to another list if so desired.
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*/
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void urb_detach (struct urb *urb)
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{
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if (urb) {
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urb_link *ul = &urb->link;
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ul->next->prev = ul->prev;
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ul->prev->next = ul->next;
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urb_link_init (ul);
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}
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}
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/*
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* Return the first urb_link in a list with a distinguished
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* head "hd", or NULL if the list is empty. This will also
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* work as a predicate, returning NULL if empty, and non-NULL
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* otherwise.
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*/
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urb_link *first_urb_link (urb_link * hd)
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{
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urb_link *nx;
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if (NULL != hd && NULL != (nx = hd->next) && nx != hd) {
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/* There is at least one element in the list */
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/* (besides the distinguished head). */
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return (nx);
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}
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/* The list is empty */
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return (NULL);
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}
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/*
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* Return the first urb in a list with a distinguished
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* head "hd", or NULL if the list is empty.
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*/
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struct urb *first_urb (urb_link * hd)
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{
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urb_link *nx;
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if (NULL == (nx = first_urb_link (hd))) {
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/* The list is empty */
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return (NULL);
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}
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return (p2surround (struct urb, link, nx));
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}
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/*
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* Detach and return the first urb in a list with a distinguished
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* head "hd", or NULL if the list is empty.
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*
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*/
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struct urb *first_urb_detached (urb_link * hd)
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{
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struct urb *urb;
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if ((urb = first_urb (hd))) {
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urb_detach (urb);
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}
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return urb;
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}
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/*
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* Append an urb_link (or a whole list of
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* urb_links) to the tail of another list
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* of urb_links.
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*/
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void urb_append (urb_link * hd, struct urb *urb)
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{
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if (hd && urb) {
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urb_link *new = &urb->link;
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/* This allows the new urb to be a list of urbs, */
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/* with new pointing at the first, but the link */
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/* must be initialized. */
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/* Order is important here... */
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urb_link *pul = hd->prev;
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new->prev->next = hd;
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hd->prev = new->prev;
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new->prev = pul;
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pul->next = new;
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}
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}
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/* URB create/destroy functions ***************************************************** */
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/**
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* usbd_alloc_urb - allocate an URB appropriate for specified endpoint
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* @device: device instance
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* @endpoint: endpoint
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*
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* Allocate an urb structure. The usb device urb structure is used to
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* contain all data associated with a transfer, including a setup packet for
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* control transfers.
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*
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* NOTE: endpoint_address MUST contain a direction flag.
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*/
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struct urb *usbd_alloc_urb (struct usb_device_instance *device,
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struct usb_endpoint_instance *endpoint)
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{
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struct urb *urb;
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if (!(urb = (struct urb *) malloc (sizeof (struct urb)))) {
|
|
usberr (" F A T A L: malloc(%zu) FAILED!!!!",
|
|
sizeof (struct urb));
|
|
return NULL;
|
|
}
|
|
|
|
/* Fill in known fields */
|
|
memset (urb, 0, sizeof (struct urb));
|
|
urb->endpoint = endpoint;
|
|
urb->device = device;
|
|
urb->buffer = (u8 *) urb->buffer_data;
|
|
urb->buffer_length = sizeof (urb->buffer_data);
|
|
|
|
urb_link_init (&urb->link);
|
|
|
|
return urb;
|
|
}
|
|
|
|
/**
|
|
* usbd_dealloc_urb - deallocate an URB and associated buffer
|
|
* @urb: pointer to an urb structure
|
|
*
|
|
* Deallocate an urb structure and associated data.
|
|
*/
|
|
void usbd_dealloc_urb (struct urb *urb)
|
|
{
|
|
if (urb) {
|
|
free (urb);
|
|
}
|
|
}
|
|
|
|
/* Event signaling functions ***************************************************** */
|
|
|
|
/**
|
|
* usbd_device_event - called to respond to various usb events
|
|
* @device: pointer to struct device
|
|
* @event: event to respond to
|
|
*
|
|
* Used by a Bus driver to indicate an event.
|
|
*/
|
|
void usbd_device_event_irq (struct usb_device_instance *device, usb_device_event_t event, int data)
|
|
{
|
|
usb_device_state_t state;
|
|
|
|
if (!device || !device->bus) {
|
|
usberr("(%p,%d) NULL device or device->bus", device, event);
|
|
return;
|
|
}
|
|
|
|
state = device->device_state;
|
|
|
|
usbinfo("%s", usbd_device_events[event]);
|
|
|
|
switch (event) {
|
|
case DEVICE_UNKNOWN:
|
|
break;
|
|
case DEVICE_INIT:
|
|
device->device_state = STATE_INIT;
|
|
break;
|
|
|
|
case DEVICE_CREATE:
|
|
device->device_state = STATE_ATTACHED;
|
|
break;
|
|
|
|
case DEVICE_HUB_CONFIGURED:
|
|
device->device_state = STATE_POWERED;
|
|
break;
|
|
|
|
case DEVICE_RESET:
|
|
device->device_state = STATE_DEFAULT;
|
|
device->address = 0;
|
|
break;
|
|
|
|
case DEVICE_ADDRESS_ASSIGNED:
|
|
device->device_state = STATE_ADDRESSED;
|
|
break;
|
|
|
|
case DEVICE_CONFIGURED:
|
|
device->device_state = STATE_CONFIGURED;
|
|
break;
|
|
|
|
case DEVICE_DE_CONFIGURED:
|
|
device->device_state = STATE_ADDRESSED;
|
|
break;
|
|
|
|
case DEVICE_BUS_INACTIVE:
|
|
if (device->status != USBD_CLOSING) {
|
|
device->status = USBD_SUSPENDED;
|
|
}
|
|
break;
|
|
case DEVICE_BUS_ACTIVITY:
|
|
if (device->status != USBD_CLOSING) {
|
|
device->status = USBD_OK;
|
|
}
|
|
break;
|
|
|
|
case DEVICE_SET_INTERFACE:
|
|
break;
|
|
case DEVICE_SET_FEATURE:
|
|
break;
|
|
case DEVICE_CLEAR_FEATURE:
|
|
break;
|
|
|
|
case DEVICE_POWER_INTERRUPTION:
|
|
device->device_state = STATE_POWERED;
|
|
break;
|
|
case DEVICE_HUB_RESET:
|
|
device->device_state = STATE_ATTACHED;
|
|
break;
|
|
case DEVICE_DESTROY:
|
|
device->device_state = STATE_UNKNOWN;
|
|
break;
|
|
|
|
case DEVICE_FUNCTION_PRIVATE:
|
|
break;
|
|
|
|
default:
|
|
usbdbg("event %d - not handled",event);
|
|
break;
|
|
}
|
|
debug("%s event: %d oldstate: %d newstate: %d status: %d address: %d",
|
|
device->name, event, state,
|
|
device->device_state, device->status, device->address);
|
|
|
|
/* tell the bus interface driver */
|
|
if( device->event ) {
|
|
/* usbdbg("calling device->event"); */
|
|
device->event(device, event, data);
|
|
}
|
|
}
|