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USB: add Printer Gadget Driver

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G_PRINTER: Adds a USB printer gadget driver for use in printer firmware.

This adds a USB printer gadget driver for use in printer firmware.
The printer gadget channels data between the USB host and a userspace
program driving the print engine. The user space program reads and
writes the device file /dev/g_printer to receive or send printer data.
It can use ioctl calls to the device file to get or set printer status.

Signed-off-by: Craig W. Nadler <craig@nadler.us>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Craig W. Nadler 2007-11-11 15:00:15 -08:00 • committed by Greg Kroah-Hartman
parent 676d3aa16f
commit 25a010c8c1
7 changed files with 2156 additions and 0 deletions
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31
include/linux/usb/g_printer.h Normal file
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/*
* g_printer.h -- Header file for USB Printer gadget driver
*
* Copyright (C) 2007 Craig W. Nadler
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define PRINTER_NOT_ERROR 0x08
#define PRINTER_SELECTED 0x10
#define PRINTER_PAPER_EMPTY 0x20
/* The 'g' code is also used by gadgetfs ioctl requests.
* Don't add any colliding codes to either driver, and keep
* them in unique ranges (size 0x20 for now).
*/
#define GADGET_GET_PRINTER_STATUS _IOR('g', 0x21, unsigned char)
#define GADGET_SET_PRINTER_STATUS _IOWR('g', 0x22, unsigned char)