drivers/usb/serial/keyspan_usa26msg.h - maze/linux - Git at Google

 /*
 	usa26msg.h

 	Copyright (C) 1998-2000 InnoSys Incorporated.  All Rights Reserved
 	This file is available under a BSD-style copyright

 	Keyspan USB Async Message Formats for the USA28X

 	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 this licence text
    	without modification, this list of conditions, and the following
    	disclaimer.  The following copyright notice must appear immediately at
    	the beginning of all source files:

         	Copyright (C) 1998-2000 InnoSys Incorporated.  All Rights Reserved

         	This file is available under a BSD-style copyright

 	2. The name of InnoSys Incorporated may not be used to endorse or promote
    	products derived from this software without specific prior written
    	permission.

 	THIS SOFTWARE IS PROVIDED BY INNOSYS CORP. ``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 AUTHOR 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.

 	Third revision: USA28X version (aka USA26)

 	Buffer formats for RX/TX data messages are not defined by
 	a structure, but are described here:

 	USB OUT (host -> USAxx, transmit) messages contain a
 	REQUEST_ACK indicator (set to 0xff to request an ACK at the
 	completion of transmit; 0x00 otherwise), followed by data:

 		RQSTACK DAT DAT DAT ...

 	with a total data length of 63.

 	USB IN (USAxx -> host, receive) messages begin with a status
 	byte in which the 0x80 bit is either:

 		(a)	0x80 bit clear
 			indicates that the bytes following it are all data
 			bytes:

 				STAT DATA DATA DATA DATA DATA ...

 			for a total of up to 63 DATA bytes,

 	or:

 		(b)	0x80 bit set
 			indiates that the bytes following alternate data and
 			status bytes:

 				STAT DATA STAT DATA STAT DATA STAT DATA ...

 			for a total of up to 32 DATA bytes.

 	The valid bits in the STAT bytes are:

 		OVERRUN	0x02
 		PARITY	0x04
 		FRAMING	0x08
 		BREAK	0x10

 	Notes:

 	(1) The OVERRUN bit can appear in either (a) or (b) format
 		messages, but the but the PARITY/FRAMING/BREAK bits
 		only appear in (b) format messages.
 	(2) For the host to determine the exact point at which the
 		overrun occurred (to identify the point in the data
 		stream at which the data was lost), it needs to count
 		128 characters, starting at the first character of the
 		message in which OVERRUN was reported; the lost character(s)
 		would have been received between the 128th and 129th
 		characters.
 	(3)	An RX data message in which the first byte has 0x80 clear
 		serves as a "break off" indicator.

 	revision history:

 	1999feb10	add reportHskiaChanges to allow us to ignore them
 	1999feb10	add txAckThreshold for fast+loose throughput enhancement
 	1999mar30	beef up support for RX error reporting
 	1999apr14	add resetDataToggle to control message
 	2000jan04	merge with usa17msg.h
 	2000jun01	add extended BSD-style copyright text
 	2001jul05	change message format to improve OVERRUN case

 	Note on shared names:

 	In the case of fields which have been merged between the USA17
 	and USA26 definitions, the USA26 definition is the first part
 	of the name and the USA17 definition is the second part of the
 	name; both meanings are described below.
 */

 #ifndef	__USA26MSG__
 #define	__USA26MSG__


 struct keyspan_usa26_portControlMessage
 {
 	/*
 		there are three types of "commands" sent in the control message:

 		1.	configuration changes which must be requested by setting
 			the corresponding "set" flag (and should only be requested
 			when necessary, to reduce overhead on the USA26):
 	*/
 	u8	setClocking,	// BOTH: host requests baud rate be set
 		baudLo,		// BOTH: host does baud divisor calculation
 		baudHi,		// BOTH: baudHi is only used for first port (gives lower rates)
 		externalClock_txClocking,
 					// USA26: 0=internal, other=external
 					// USA17: 0=internal, other=external/RI
 		rxClocking,		// USA17: 0=internal, 1=external/RI, other=external/DSR


 		setLcr,			// BOTH: host requests lcr be set
 		lcr,			// BOTH: use PARITY, STOPBITS, DATABITS below

 		setFlowControl,		// BOTH: host requests flow control be set
 		ctsFlowControl,		// BOTH: 1=use CTS flow control, 0=don't
 		xonFlowControl,		// BOTH: 1=use XON/XOFF flow control, 0=don't
 		xonChar,		// BOTH: specified in current character format
 		xoffChar,		// BOTH: specified in current character format

 		setTxTriState_setRts,
 					// USA26: host requests TX tri-state be set
 					// USA17: host requests RTS output be set
 		txTriState_rts,		// BOTH: 1=active (normal), 0=tristate (off)

 		setHskoa_setDtr,
 					// USA26: host requests HSKOA output be set
 					// USA17: host requests DTR output be set
 		hskoa_dtr,		// BOTH: 1=on, 0=off

 		setPrescaler,		// USA26: host requests prescalar be set (default: 13)
 		prescaler;		// BOTH: specified as N/8; values 8-ff are valid
 					// must be set any time internal baud rate is set;
 					// must not be set when external clocking is used
 					// note: in USA17, prescaler is applied whenever
 					// setClocking is requested

 	/*
 		3.	configuration data which is simply used as is (no overhead,
 			but must be specified correctly in every host message).
 	*/
 	u8	forwardingLength,  // BOTH: forward when this number of chars available
 		reportHskiaChanges_dsrFlowControl,
 						// USA26: 1=normal; 0=ignore external clock
 						// USA17: 1=use DSR flow control, 0=don't
 		txAckThreshold,	// BOTH: 0=not allowed, 1=normal, 2-255 deliver ACK faster
 		loopbackMode;	// BOTH: 0=no loopback, 1=loopback enabled

 	/*
 		4.	commands which are flags only; these are processed in order
 			(so that, e.g., if both _txOn and _txOff flags are set, the
 			port ends in a TX_OFF state); any non-zero value is respected
 	*/
 	u8	_txOn,			// BOTH: enable transmitting (and continue if there's data)
 		_txOff,			// BOTH: stop transmitting
 		txFlush,		// BOTH: toss outbound data
 		txBreak,		// BOTH: turn on break (cleared by _txOn)
 		rxOn,			// BOTH: turn on receiver
 		rxOff,			// BOTH: turn off receiver
 		rxFlush,		// BOTH: toss inbound data
 		rxForward,		// BOTH: forward all inbound data, NOW (as if fwdLen==1)
 		returnStatus,	// BOTH: return current status (even if it hasn't changed)
 		resetDataToggle;// BOTH: reset data toggle state to DATA0

 };

 // defines for bits in lcr
 #define	USA_DATABITS_5		0x00
 #define	USA_DATABITS_6		0x01
 #define	USA_DATABITS_7		0x02
 #define	USA_DATABITS_8		0x03
 #define	STOPBITS_5678_1	0x00	// 1 stop bit for all byte sizes
 #define	STOPBITS_5_1p5	0x04	// 1.5 stop bits for 5-bit byte
 #define	STOPBITS_678_2	0x04	// 2 stop bits for 6/7/8-bit byte
 #define	USA_PARITY_NONE		0x00
 #define	USA_PARITY_ODD		0x08
 #define	USA_PARITY_EVEN		0x18
 #define	PARITY_1		0x28
 #define	PARITY_0		0x38

 // all things called "StatusMessage" are sent on the status endpoint

 struct keyspan_usa26_portStatusMessage	// one for each port
 {
 	u8	port,			// BOTH: 0=first, 1=second, other=see below
 		hskia_cts,		// USA26: reports HSKIA pin
 						// USA17: reports CTS pin
 		gpia_dcd,		// USA26: reports GPIA pin
 						// USA17: reports DCD pin
 		dsr,			// USA17: reports DSR pin
 		ri,				// USA17: reports RI pin
 		_txOff,			// port has been disabled (by host)
 		_txXoff,		// port is in XOFF state (either host or RX XOFF)
 		rxEnabled,		// as configured by rxOn/rxOff 1=on, 0=off
 		controlResponse;// 1=a control message has been processed
 };

 // bits in RX data message when STAT byte is included
 #define	RXERROR_OVERRUN	0x02
 #define	RXERROR_PARITY	0x04
 #define	RXERROR_FRAMING	0x08
 #define	RXERROR_BREAK	0x10

 struct keyspan_usa26_globalControlMessage
 {
 	u8	sendGlobalStatus,	// 2=request for two status responses
 		resetStatusToggle,	// 1=reset global status toggle
 		resetStatusCount;	// a cycling value
 };

 struct keyspan_usa26_globalStatusMessage
 {
 	u8	port,				// 3
 		sendGlobalStatus,	// from request, decremented
 		resetStatusCount;	// as in request
 };

 struct keyspan_usa26_globalDebugMessage
 {
 	u8	port,				// 2
 		a,
 		b,
 		c,
 		d;
 };

 // ie: the maximum length of an EZUSB endpoint buffer
 #define	MAX_DATA_LEN			64

 // update status approx. 60 times a second (16.6666 ms)
 #define	STATUS_UPDATE_INTERVAL	16

 // status rationing tuning value (each port gets checked each n ms)
 #define	STATUS_RATION	10

 #endif
	/*
	usa26msg.h

	Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved
	This file is available under a BSD-style copyright

	Keyspan USB Async Message Formats for the USA28X

	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 this licence text
	without modification, this list of conditions, and the following
	disclaimer. The following copyright notice must appear immediately at
	the beginning of all source files:

	Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved

	This file is available under a BSD-style copyright

	2. The name of InnoSys Incorporated may not be used to endorse or promote
	products derived from this software without specific prior written
	permission.

	THIS SOFTWARE IS PROVIDED BY INNOSYS CORP. ``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 AUTHOR 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.

	Third revision: USA28X version (aka USA26)

	Buffer formats for RX/TX data messages are not defined by
	a structure, but are described here:

	USB OUT (host -> USAxx, transmit) messages contain a
	REQUEST_ACK indicator (set to 0xff to request an ACK at the
	completion of transmit; 0x00 otherwise), followed by data:

	RQSTACK DAT DAT DAT ...

	with a total data length of 63.

	USB IN (USAxx -> host, receive) messages begin with a status
	byte in which the 0x80 bit is either:

	(a) 0x80 bit clear
	indicates that the bytes following it are all data
	bytes:

	STAT DATA DATA DATA DATA DATA ...

	for a total of up to 63 DATA bytes,

	or:

	(b) 0x80 bit set
	indiates that the bytes following alternate data and
	status bytes:

	STAT DATA STAT DATA STAT DATA STAT DATA ...

	for a total of up to 32 DATA bytes.

	The valid bits in the STAT bytes are:

	OVERRUN 0x02
	PARITY 0x04
	FRAMING 0x08
	BREAK 0x10

	Notes:

	(1) The OVERRUN bit can appear in either (a) or (b) format
	messages, but the but the PARITY/FRAMING/BREAK bits
	only appear in (b) format messages.
	(2) For the host to determine the exact point at which the
	overrun occurred (to identify the point in the data
	stream at which the data was lost), it needs to count
	128 characters, starting at the first character of the
	message in which OVERRUN was reported; the lost character(s)
	would have been received between the 128th and 129th
	characters.
	(3) An RX data message in which the first byte has 0x80 clear
	serves as a "break off" indicator.

	revision history:

	1999feb10 add reportHskiaChanges to allow us to ignore them
	1999feb10 add txAckThreshold for fast+loose throughput enhancement
	1999mar30 beef up support for RX error reporting
	1999apr14 add resetDataToggle to control message
	2000jan04 merge with usa17msg.h
	2000jun01 add extended BSD-style copyright text
	2001jul05 change message format to improve OVERRUN case

	Note on shared names:

	In the case of fields which have been merged between the USA17
	and USA26 definitions, the USA26 definition is the first part
	of the name and the USA17 definition is the second part of the
	name; both meanings are described below.
	*/

	#ifndef __USA26MSG__
	#define __USA26MSG__


	struct keyspan_usa26_portControlMessage
	{
	/*
	there are three types of "commands" sent in the control message:

	1. configuration changes which must be requested by setting
	the corresponding "set" flag (and should only be requested
	when necessary, to reduce overhead on the USA26):
	*/
	u8 setClocking, // BOTH: host requests baud rate be set
	baudLo, // BOTH: host does baud divisor calculation
	baudHi, // BOTH: baudHi is only used for first port (gives lower rates)
	externalClock_txClocking,
	// USA26: 0=internal, other=external
	// USA17: 0=internal, other=external/RI
	rxClocking, // USA17: 0=internal, 1=external/RI, other=external/DSR


	setLcr, // BOTH: host requests lcr be set
	lcr, // BOTH: use PARITY, STOPBITS, DATABITS below

	setFlowControl, // BOTH: host requests flow control be set
	ctsFlowControl, // BOTH: 1=use CTS flow control, 0=don't
	xonFlowControl, // BOTH: 1=use XON/XOFF flow control, 0=don't
	xonChar, // BOTH: specified in current character format
	xoffChar, // BOTH: specified in current character format

	setTxTriState_setRts,
	// USA26: host requests TX tri-state be set
	// USA17: host requests RTS output be set
	txTriState_rts, // BOTH: 1=active (normal), 0=tristate (off)

	setHskoa_setDtr,
	// USA26: host requests HSKOA output be set
	// USA17: host requests DTR output be set
	hskoa_dtr, // BOTH: 1=on, 0=off

	setPrescaler, // USA26: host requests prescalar be set (default: 13)
	prescaler; // BOTH: specified as N/8; values 8-ff are valid
	// must be set any time internal baud rate is set;
	// must not be set when external clocking is used
	// note: in USA17, prescaler is applied whenever
	// setClocking is requested

	/*
	3. configuration data which is simply used as is (no overhead,
	but must be specified correctly in every host message).
	*/
	u8 forwardingLength, // BOTH: forward when this number of chars available
	reportHskiaChanges_dsrFlowControl,
	// USA26: 1=normal; 0=ignore external clock
	// USA17: 1=use DSR flow control, 0=don't
	txAckThreshold, // BOTH: 0=not allowed, 1=normal, 2-255 deliver ACK faster
	loopbackMode; // BOTH: 0=no loopback, 1=loopback enabled

	/*
	4. commands which are flags only; these are processed in order
	(so that, e.g., if both _txOn and _txOff flags are set, the
	port ends in a TX_OFF state); any non-zero value is respected
	*/
	u8 _txOn, // BOTH: enable transmitting (and continue if there's data)
	_txOff, // BOTH: stop transmitting
	txFlush, // BOTH: toss outbound data
	txBreak, // BOTH: turn on break (cleared by _txOn)
	rxOn, // BOTH: turn on receiver
	rxOff, // BOTH: turn off receiver
	rxFlush, // BOTH: toss inbound data
	rxForward, // BOTH: forward all inbound data, NOW (as if fwdLen==1)
	returnStatus, // BOTH: return current status (even if it hasn't changed)
	resetDataToggle;// BOTH: reset data toggle state to DATA0

	};

	// defines for bits in lcr
	#define USA_DATABITS_5 0x00
	#define USA_DATABITS_6 0x01
	#define USA_DATABITS_7 0x02
	#define USA_DATABITS_8 0x03
	#define STOPBITS_5678_1 0x00 // 1 stop bit for all byte sizes
	#define STOPBITS_5_1p5 0x04 // 1.5 stop bits for 5-bit byte
	#define STOPBITS_678_2 0x04 // 2 stop bits for 6/7/8-bit byte
	#define USA_PARITY_NONE 0x00
	#define USA_PARITY_ODD 0x08
	#define USA_PARITY_EVEN 0x18
	#define PARITY_1 0x28
	#define PARITY_0 0x38

	// all things called "StatusMessage" are sent on the status endpoint

	struct keyspan_usa26_portStatusMessage // one for each port
	{
	u8 port, // BOTH: 0=first, 1=second, other=see below
	hskia_cts, // USA26: reports HSKIA pin
	// USA17: reports CTS pin
	gpia_dcd, // USA26: reports GPIA pin
	// USA17: reports DCD pin
	dsr, // USA17: reports DSR pin
	ri, // USA17: reports RI pin
	_txOff, // port has been disabled (by host)
	_txXoff, // port is in XOFF state (either host or RX XOFF)
	rxEnabled, // as configured by rxOn/rxOff 1=on, 0=off
	controlResponse;// 1=a control message has been processed
	};

	// bits in RX data message when STAT byte is included
	#define RXERROR_OVERRUN 0x02
	#define RXERROR_PARITY 0x04
	#define RXERROR_FRAMING 0x08
	#define RXERROR_BREAK 0x10

	struct keyspan_usa26_globalControlMessage
	{
	u8 sendGlobalStatus, // 2=request for two status responses
	resetStatusToggle, // 1=reset global status toggle
	resetStatusCount; // a cycling value
	};

	struct keyspan_usa26_globalStatusMessage
	{
	u8 port, // 3
	sendGlobalStatus, // from request, decremented
	resetStatusCount; // as in request
	};

	struct keyspan_usa26_globalDebugMessage
	{
	u8 port, // 2
	a,
	b,
	c,
	d;
	};

	// ie: the maximum length of an EZUSB endpoint buffer
	#define MAX_DATA_LEN 64

	// update status approx. 60 times a second (16.6666 ms)
	#define STATUS_UPDATE_INTERVAL 16

	// status rationing tuning value (each port gets checked each n ms)
	#define STATUS_RATION 10

	#endif