/* * Copyright (C) 2003 David Brownell * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published * by the Free Software Foundation; either version 2.1 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include /** * usb_gadget_get_string - fill out a string descriptor * @table: of c strings encoded using UTF-8 * @id: string id, from low byte of wValue in get string descriptor * @buf: at least 256 bytes, must be 16-bit aligned * * Finds the UTF-8 string matching the ID, and converts it into a * string descriptor in utf16-le. * Returns length of descriptor (always even) or negative errno * * If your driver needs stings in multiple languages, you'll probably * "switch (wIndex) { ... }" in your ep0 string descriptor logic, * using this routine after choosing which set of UTF-8 strings to use. * Note that US-ASCII is a strict subset of UTF-8; any string bytes with * the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1 * characters (which are also widely used in C strings). */ int usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf) { struct usb_string *s; int len; /* descriptor 0 has the language id */ if (id == 0) { buf [0] = 4; buf [1] = USB_DT_STRING; buf [2] = (u8) table->language; buf [3] = (u8) (table->language >> 8); return 4; } for (s = table->strings; s && s->s; s++) if (s->id == id) break; /* unrecognized: stall. */ if (!s || !s->s) return -EINVAL; /* string descriptors have length, tag, then UTF16-LE text */ len = min ((size_t) 126, strlen (s->s)); len = utf8s_to_utf16s(s->s, len, UTF16_LITTLE_ENDIAN, (wchar_t *) &buf[2], 126); if (len < 0) return -EINVAL; buf [0] = (len + 1) * 2; buf [1] = USB_DT_STRING; return buf [0]; } EXPORT_SYMBOL_GPL(usb_gadget_get_string); vate-remove&id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>diff
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authorAleksander Morgado <aleksander@aleksander.es>2017-01-18 21:31:31 +0100
committerJohan Hovold <johan@kernel.org>2017-01-19 09:08:37 +0100
commit24d615a694d649aa2e167c3f97f62bdad07e3f84 (patch)
tree2fe33c115bdec6bf4b01e27afd90bb16fa668e22 /sound/soc
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
USB: serial: qcserial: add Dell DW5570 QDL
The Dell DW5570 is a re-branded Sierra Wireless MC8805 which will by default boot with vid 0x413c and pid 0x81a3. When triggered QDL download mode, the device switches to pid 0x81a6 and provides the standard TTY used for firmware upgrade. Cc: <stable@vger.kernel.org> Signed-off-by: Aleksander Morgado <aleksander@aleksander.es> Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'sound/soc')