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keyspan_usa49msg.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:9k
源码类别:
Linux/Unix编程
开发平台:
Unix_Linux
- /*
- usa49msg.h
- Copyright (c) 1998-2000 InnoSys Incorporated. All Rights Reserved
- This file is available under a BSD-style copyright
- Keyspan USB Async Firmware to run on Anchor EZ-USB
- 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. 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.
- 3. The name of InnoSys Incorprated 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