upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
3.2 KiB
107 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* usb/gadget/config.c -- simplify building config descriptors
|
|
*
|
|
* Copyright (C) 2003 David Brownell
|
|
*
|
|
* Ported to U-Boot by: Thomas Smits <ts.smits@gmail.com> and
|
|
* Remy Bohmer <linux@bohmer.net>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/unaligned.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/list.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/gadget.h>
|
|
|
|
|
|
/**
|
|
* usb_descriptor_fillbuf - fill buffer with descriptors
|
|
* @buf: Buffer to be filled
|
|
* @buflen: Size of buf
|
|
* @src: Array of descriptor pointers, terminated by null pointer.
|
|
*
|
|
* Copies descriptors into the buffer, returning the length or a
|
|
* negative error code if they can't all be copied. Useful when
|
|
* assembling descriptors for an associated set of interfaces used
|
|
* as part of configuring a composite device; or in other cases where
|
|
* sets of descriptors need to be marshaled.
|
|
*/
|
|
int
|
|
usb_descriptor_fillbuf(void *buf, unsigned buflen,
|
|
const struct usb_descriptor_header **src)
|
|
{
|
|
u8 *dest = buf;
|
|
|
|
if (!src)
|
|
return -EINVAL;
|
|
|
|
/* fill buffer from src[] until null descriptor ptr */
|
|
for (; NULL != *src; src++) {
|
|
unsigned len = (*src)->bLength;
|
|
|
|
if (len > buflen)
|
|
return -EINVAL;
|
|
memcpy(dest, *src, len);
|
|
buflen -= len;
|
|
dest += len;
|
|
}
|
|
return dest - (u8 *)buf;
|
|
}
|
|
|
|
|
|
/**
|
|
* usb_gadget_config_buf - builts a complete configuration descriptor
|
|
* @config: Header for the descriptor, including characteristics such
|
|
* as power requirements and number of interfaces.
|
|
* @desc: Null-terminated vector of pointers to the descriptors (interface,
|
|
* endpoint, etc) defining all functions in this device configuration.
|
|
* @buf: Buffer for the resulting configuration descriptor.
|
|
* @length: Length of buffer. If this is not big enough to hold the
|
|
* entire configuration descriptor, an error code will be returned.
|
|
*
|
|
* This copies descriptors into the response buffer, building a descriptor
|
|
* for that configuration. It returns the buffer length or a negative
|
|
* status code. The config.wTotalLength field is set to match the length
|
|
* of the result, but other descriptor fields (including power usage and
|
|
* interface count) must be set by the caller.
|
|
*
|
|
* Gadget drivers could use this when constructing a config descriptor
|
|
* in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
|
|
* resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
|
|
*/
|
|
int usb_gadget_config_buf(
|
|
const struct usb_config_descriptor *config,
|
|
void *buf,
|
|
unsigned length,
|
|
const struct usb_descriptor_header **desc
|
|
)
|
|
{
|
|
struct usb_config_descriptor *cp = buf;
|
|
int len;
|
|
|
|
/* config descriptor first */
|
|
if (length < USB_DT_CONFIG_SIZE || !desc)
|
|
return -EINVAL;
|
|
/* config need not be aligned */
|
|
memcpy(cp, config, sizeof(*cp));
|
|
|
|
/* then interface/endpoint/class/vendor/... */
|
|
len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8 *)buf,
|
|
length - USB_DT_CONFIG_SIZE, desc);
|
|
if (len < 0)
|
|
return len;
|
|
len += USB_DT_CONFIG_SIZE;
|
|
if (len > 0xffff)
|
|
return -EINVAL;
|
|
|
|
/* patch up the config descriptor */
|
|
cp->bLength = USB_DT_CONFIG_SIZE;
|
|
cp->bDescriptorType = USB_DT_CONFIG;
|
|
put_unaligned_le16(len, &cp->wTotalLength);
|
|
cp->bmAttributes |= USB_CONFIG_ATT_ONE;
|
|
return len;
|
|
}
|
|
|