mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-07 03:36:16 +09:00
6142e0ae0f
Fixes most of checkpatch warnings and errors in USB gadget stack.
The most frequently encountered problems are:
1) "(foo*)", "foo * bar", "foo* bar"
2) C99 // comments
3) No spaces before/after/around '?', ':', '=', '==', ',', '&', '('
4) Spaces before '['
5) Spaces between function names and '('
6) Block braces in wrong places
7) Spaces before tabs
8) Macros with complex values not enclosed in parenthesis
9) Multiline comments start just after /*
Signed-off-by: Vitaly Kuzmichev <vkuzmichev@mvista.com>
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
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* Copyright (C) 2003 David Brownell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* Ported to U-boot by: Thomas Smits <ts.smits@gmail.com> and
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* Remy Bohmer <linux@bohmer.net>
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*/
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#include <common.h>
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#include <asm/errno.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <asm/unaligned.h>
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static int utf8_to_utf16le(const char *s, __le16 *cp, unsigned len)
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{
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int count = 0;
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u8 c;
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u16 uchar;
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/*
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* this insists on correct encodings, though not minimal ones.
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* BUT it currently rejects legit 4-byte UTF-8 code points,
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* which need surrogate pairs. (Unicode 3.1 can use them.)
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*/
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while (len != 0 && (c = (u8) *s++) != 0) {
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if ((c & 0x80)) {
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/*
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* 2-byte sequence:
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* 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
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*/
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if ((c & 0xe0) == 0xc0) {
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uchar = (c & 0x1f) << 6;
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c = (u8) *s++;
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if ((c & 0xc0) != 0x80)
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goto fail;
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c &= 0x3f;
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uchar |= c;
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/*
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* 3-byte sequence (most CJKV characters):
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* zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
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*/
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} else if ((c & 0xf0) == 0xe0) {
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uchar = (c & 0x0f) << 12;
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c = (u8) *s++;
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if ((c & 0xc0) != 0x80)
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goto fail;
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c &= 0x3f;
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uchar |= c << 6;
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c = (u8) *s++;
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if ((c & 0xc0) != 0x80)
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goto fail;
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c &= 0x3f;
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uchar |= c;
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/* no bogus surrogates */
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if (0xd800 <= uchar && uchar <= 0xdfff)
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goto fail;
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/*
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* 4-byte sequence (surrogate pairs, currently rare):
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* 11101110wwwwzzzzyy + 110111yyyyxxxxxx
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* = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
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* (uuuuu = wwww + 1)
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* FIXME accept the surrogate code points (only)
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*/
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} else
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goto fail;
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} else
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uchar = c;
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put_unaligned_le16(uchar, cp++);
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count++;
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len--;
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}
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return count;
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fail:
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return -1;
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}
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/**
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* usb_gadget_get_string - fill out a string descriptor
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* @table: of c strings encoded using UTF-8
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* @id: string id, from low byte of wValue in get string descriptor
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* @buf: at least 256 bytes
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*
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* Finds the UTF-8 string matching the ID, and converts it into a
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* string descriptor in utf16-le.
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* Returns length of descriptor (always even) or negative errno
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*
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* If your driver needs stings in multiple languages, you'll probably
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* "switch (wIndex) { ... }" in your ep0 string descriptor logic,
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* using this routine after choosing which set of UTF-8 strings to use.
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* Note that US-ASCII is a strict subset of UTF-8; any string bytes with
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* the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1
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* characters (which are also widely used in C strings).
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*/
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int
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usb_gadget_get_string(struct usb_gadget_strings *table, int id, u8 *buf)
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{
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struct usb_string *s;
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int len;
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/* descriptor 0 has the language id */
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if (id == 0) {
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buf[0] = 4;
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buf[1] = USB_DT_STRING;
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buf[2] = (u8) table->language;
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buf[3] = (u8) (table->language >> 8);
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return 4;
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}
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for (s = table->strings; s && s->s; s++)
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if (s->id == id)
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break;
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/* unrecognized: stall. */
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if (!s || !s->s)
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return -EINVAL;
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/* string descriptors have length, tag, then UTF16-LE text */
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len = min((size_t) 126, strlen(s->s));
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memset(buf + 2, 0, 2 * len); /* zero all the bytes */
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len = utf8_to_utf16le(s->s, (__le16 *)&buf[2], len);
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if (len < 0)
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return -EINVAL;
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buf[0] = (len + 1) * 2;
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buf[1] = USB_DT_STRING;
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return buf[0];
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}
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