drivers/usb/serial/keyspan_usa49msg.h - kernel/common - Git at Google

 /*
 	usa49msg.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 USA49W

 	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.

 	4th revision: USA49W version

 	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.
 	(4)	a control message specifying disablePort will be answered
 		with a status message, but no further status will be sent
 		until a control messages with enablePort is sent

 	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
 	2000mar08	clone from usa26msg.h -> usa49msg.h
 	2000mar09	change to support 4 ports
 	2000may03	change external clocking to match USA-49W hardware
 	2000jun01	add extended BSD-style copyright text
 	2001jul05	change message format to improve OVERRUN case
 */

 #ifndef	__USA49MSG__
 #define	__USA49MSG__


 /*
 	Host->device messages sent on the global control endpoint:

 	portNumber	message
 	----------	--------------------
 	0,1,2,3		portControlMessage
 	0x80		globalControlMessage
 */

 struct keyspan_usa49_portControlMessage
 {
 	/*
 		0.	0/1/2/3 	port control message follows
 			0x80 set	non-port control message follows
 	*/
 	u8	portNumber,

 	/*
 		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):
 	*/
 		setClocking,	// host requests baud rate be set
 		baudLo,			// host does baud divisor calculation
 		baudHi,			// baudHi is only used for first port (gives lower rates)
 		prescaler,		// specified as N/8; values 8-ff are valid
 						// must be set any time internal baud rate is set;
 		txClocking,		// 0=internal, 1=external/DSR
 		rxClocking,		// 0=internal, 1=external/DSR

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

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

 		setRts,			// host requests RTS output be set
 		rts,			// 1=active, 0=inactive

 		setDtr,			// host requests DTR output be set
 		dtr;			// 1=on, 0=off


 	/*
 		3.	configuration data which is simply used as is (no overhead,
 			but must be specified correctly in every host message).
 	*/
 	u8	forwardingLength,  // forward when this number of chars available
 		dsrFlowControl,	// 1=use DSR flow control, 0=don't
 		txAckThreshold,	// 0=not allowed, 1=normal, 2-255 deliver ACK faster
 		loopbackMode;	// 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,			// enable transmitting (and continue if there's data)
 		_txOff,			// stop transmitting
 		txFlush,		// toss outbound data
 		txBreak,		// turn on break (cleared by _txOn)
 		rxOn,			// turn on receiver
 		rxOff,			// turn off receiver
 		rxFlush,		// toss inbound data
 		rxForward,		// forward all inbound data, NOW (as if fwdLen==1)
 		returnStatus,	// return current status (even if it hasn't changed)
 		resetDataToggle,// reset data toggle state to DATA0
 		enablePort,		// start servicing port (move data, check status)
 		disablePort;	// stop servicing port (does implicit tx/rx flush/off)

 };

 // 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

 /*
 	during normal operation, status messages are returned
 	to the host whenever the board detects changes.  In some
 	circumstances (e.g. Windows), status messages from the
 	device cause problems; to shut them off, the host issues
 	a control message with the disableStatusMessages flags
 	set (to any non-zero value).  The device will respond to
 	this message, and then suppress further status messages;
 	it will resume sending status messages any time the host
 	sends any control message (either global or port-specific).
 */

 struct keyspan_usa49_globalControlMessage
 {
 	u8	portNumber,			// 0x80
 		sendGlobalStatus,	// 1/2=number of status responses requested
 		resetStatusToggle,	// 1=reset global status toggle
 		resetStatusCount,	// a cycling value
 		remoteWakeupEnable,		// 0x10=P1, 0x20=P2, 0x40=P3, 0x80=P4
 		disableStatusMessages;	// 1=send no status until host talks
 };

 /*
 	Device->host messages send on the global status endpoint

 	portNumber			message
 	----------			--------------------
 	0x00,0x01,0x02,0x03	portStatusMessage
 	0x80				globalStatusMessage
 	0x81				globalDebugMessage
 */

 struct keyspan_usa49_portStatusMessage	// one for each port
 {
 	u8	portNumber,		// 0,1,2,3
 		cts,			// reports CTS pin
 		dcd,			// reports DCD pin
 		dsr,			// reports DSR pin
 		ri,				// reports RI pin
 		_txOff,			// transmit has been disabled (by host)
 		_txXoff,		// transmit 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
 		txAck,			// ACK (data TX complete)
 		rs232valid;		// RS-232 signal valid
 };

 // 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_usa49_globalStatusMessage
 {
 	u8	portNumber,			// 0x80=globalStatusMessage
 		sendGlobalStatus,	// from request, decremented
 		resetStatusCount;	// as in request
 };

 struct keyspan_usa49_globalDebugMessage
 {
 	u8	portNumber,			// 0x81=globalDebugMessage
 		n,					// typically a count/status byte
 		b;					// typically a data byte
 };

 // 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
	/*
	usa49msg.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 USA49W

	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.

	4th revision: USA49W version

	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.
	(4) a control message specifying disablePort will be answered
	with a status message, but no further status will be sent
	until a control messages with enablePort is sent

	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
	2000mar08 clone from usa26msg.h -> usa49msg.h
	2000mar09 change to support 4 ports
	2000may03 change external clocking to match USA-49W hardware
	2000jun01 add extended BSD-style copyright text
	2001jul05 change message format to improve OVERRUN case
	*/

	#ifndef __USA49MSG__
	#define __USA49MSG__


	/*
	Host->device messages sent on the global control endpoint:

	portNumber message
	---------- --------------------
	0,1,2,3 portControlMessage
	0x80 globalControlMessage
	*/

	struct keyspan_usa49_portControlMessage
	{
	/*
	0. 0/1/2/3 port control message follows
	0x80 set non-port control message follows
	*/
	u8 portNumber,

	/*
	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):
	*/
	setClocking, // host requests baud rate be set
	baudLo, // host does baud divisor calculation
	baudHi, // baudHi is only used for first port (gives lower rates)
	prescaler, // specified as N/8; values 8-ff are valid
	// must be set any time internal baud rate is set;
	txClocking, // 0=internal, 1=external/DSR
	rxClocking, // 0=internal, 1=external/DSR

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

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

	setRts, // host requests RTS output be set
	rts, // 1=active, 0=inactive

	setDtr, // host requests DTR output be set
	dtr; // 1=on, 0=off


	/*
	3. configuration data which is simply used as is (no overhead,
	but must be specified correctly in every host message).
	*/
	u8 forwardingLength, // forward when this number of chars available
	dsrFlowControl, // 1=use DSR flow control, 0=don't
	txAckThreshold, // 0=not allowed, 1=normal, 2-255 deliver ACK faster
	loopbackMode; // 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, // enable transmitting (and continue if there's data)
	_txOff, // stop transmitting
	txFlush, // toss outbound data
	txBreak, // turn on break (cleared by _txOn)
	rxOn, // turn on receiver
	rxOff, // turn off receiver
	rxFlush, // toss inbound data
	rxForward, // forward all inbound data, NOW (as if fwdLen==1)
	returnStatus, // return current status (even if it hasn't changed)
	resetDataToggle,// reset data toggle state to DATA0
	enablePort, // start servicing port (move data, check status)
	disablePort; // stop servicing port (does implicit tx/rx flush/off)

	};

	// 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

	/*
	during normal operation, status messages are returned
	to the host whenever the board detects changes. In some
	circumstances (e.g. Windows), status messages from the
	device cause problems; to shut them off, the host issues
	a control message with the disableStatusMessages flags
	set (to any non-zero value). The device will respond to
	this message, and then suppress further status messages;
	it will resume sending status messages any time the host
	sends any control message (either global or port-specific).
	*/

	struct keyspan_usa49_globalControlMessage
	{
	u8 portNumber, // 0x80
	sendGlobalStatus, // 1/2=number of status responses requested
	resetStatusToggle, // 1=reset global status toggle
	resetStatusCount, // a cycling value
	remoteWakeupEnable, // 0x10=P1, 0x20=P2, 0x40=P3, 0x80=P4
	disableStatusMessages; // 1=send no status until host talks
	};

	/*
	Device->host messages send on the global status endpoint

	portNumber message
	---------- --------------------
	0x00,0x01,0x02,0x03 portStatusMessage
	0x80 globalStatusMessage
	0x81 globalDebugMessage
	*/

	struct keyspan_usa49_portStatusMessage // one for each port
	{
	u8 portNumber, // 0,1,2,3
	cts, // reports CTS pin
	dcd, // reports DCD pin
	dsr, // reports DSR pin
	ri, // reports RI pin
	_txOff, // transmit has been disabled (by host)
	_txXoff, // transmit 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
	txAck, // ACK (data TX complete)
	rs232valid; // RS-232 signal valid
	};

	// 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_usa49_globalStatusMessage
	{
	u8 portNumber, // 0x80=globalStatusMessage
	sendGlobalStatus, // from request, decremented
	resetStatusCount; // as in request
	};

	struct keyspan_usa49_globalDebugMessage
	{
	u8 portNumber, // 0x81=globalDebugMessage
	n, // typically a count/status byte
	b; // typically a data byte
	};

	// 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