/*	$NetBSD: ucomvar.h,v 1.20 2011/12/19 19:34:52 jakllsch Exp $	*/

/*
 * Copyright (c) 1999 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (lennart@augustsson.net) at
 * Carlstedt Research & Technology.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */


/* just for ucom_attach_args, not in the config namespace */
#define UCOM_UNK_PORTNO (-1)

struct	ucom_softc;

struct ucom_methods {
	void (*ucom_get_status)(void *sc, int portno, u_char *lsr, u_char *msr);
	void (*ucom_set)(void *sc, int portno, int reg, int onoff);
#define UCOM_SET_DTR 1
#define UCOM_SET_RTS 2
#define UCOM_SET_BREAK 3
	int (*ucom_param)(void *sc, int portno, struct termios *);
	int (*ucom_ioctl)(void *sc, int portno, u_long cmd,
			  void *data, int flag, proc_t *p);
	int (*ucom_open)(void *sc, int portno);
	void (*ucom_close)(void *sc, int portno);
	/*
	 * Note: The 'ptr' and 'count' pointers can be adjusted as follows:
	 *  ptr: If consuming characters from the start of the buffer,
	 *       advance '*ptr' to skip the data consumed.
	 *  count: If consuming characters at the end of the buffer,
	 *         decrement '*count' by the number of characters consumed.
	 * If consuming all characters, set '*count' to zero.
	 */
	void (*ucom_read)(void *sc, int portno, u_char **ptr, u_int32_t *count);
	void (*ucom_write)(void *sc, int portno, u_char *to, u_char *from,
			   u_int32_t *count);
};

/* modem control register */
#define	UMCR_RTS	0x02	/* Request To Send */
#define	UMCR_DTR	0x01	/* Data Terminal Ready */

/* line status register */
#define	ULSR_RCV_FIFO	0x80
#define	ULSR_TSRE	0x40	/* Transmitter empty: byte sent */
#define	ULSR_TXRDY	0x20	/* Transmitter buffer empty */
#define	ULSR_BI		0x10	/* Break detected */
#define	ULSR_FE		0x08	/* Framing error: bad stop bit */
#define	ULSR_PE		0x04	/* Parity error */
#define	ULSR_OE		0x02	/* Overrun, lost incoming byte */
#define	ULSR_RXRDY	0x01	/* Byte ready in Receive Buffer */
#define	ULSR_RCV_MASK	0x1f	/* Mask for incoming data or error */

/* modem status register */
/* All deltas are from the last read of the MSR. */
#define	UMSR_DCD	0x80	/* Current Data Carrier Detect */
#define	UMSR_RI		0x40	/* Current Ring Indicator */
#define	UMSR_DSR	0x20	/* Current Data Set Ready */
#define	UMSR_CTS	0x10	/* Current Clear to Send */
#define	UMSR_DDCD	0x08	/* DCD has changed state */
#define	UMSR_TERI	0x04	/* RI has toggled low to high */
#define	UMSR_DDSR	0x02	/* DSR has changed state */
#define	UMSR_DCTS	0x01	/* CTS has changed state */

struct ucom_attach_args {
	int portno;
	int bulkin;
	int bulkout;
	u_int ibufsize;
	u_int ibufsizepad;
	u_int obufsize;
	u_int opkthdrlen;
	const char *info;	/* attach message */
	usbd_device_handle device;
	usbd_interface_handle iface;
	const struct ucom_methods *methods;
	void *arg;
};

int ucomprint(void *, const char *);
int ucomsubmatch(device_t t, cfdata_t, const int *, void *);
void ucom_status_change(struct ucom_softc *);