11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usa28msg.h 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This file is available under a BSD-style copyright 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Keyspan USB Async Message Formats for the USA26X 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Redistribution and use in source and binary forms, with or without 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds modification, are permitted provided that the following conditions are 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds met: 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1. Redistributions of source code must retain this licence text 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds without modification, this list of conditions, and the following 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disclaimer. The following copyright notice must appear immediately at 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the beginning of all source files: 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Copyright (C) 1998-2000 InnoSys Incorporated. All Rights Reserved 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This file is available under a BSD-style copyright 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2. The name of InnoSys Incorporated may not be used to endorse or promote 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds products derived from this software without specific prior written 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds permission. 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds THIS SOFTWARE IS PROVIDED BY INNOSYS CORP. ``AS IS'' AND ANY EXPRESS OR 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SUCH DAMAGE. 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: these message formats are common to USA18, USA19, and USA28; 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (for USA28X, see usa26msg.h) 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Buffer formats for RX/TX data messages are not defined by 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds a structure, but are described here: 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB OUT (host -> USA28, transmit) messages contain a 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds REQUEST_ACK indicator (set to 0xff to request an ACK at the 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds completion of transmit; 0x00 otherwise), followed by data. 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If the port is configured for parity, the data will be an 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds alternating string of parity and data bytes, so the message 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds format will be: 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RQSTACK PAR DAT PAR DAT ... 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds so the maximum length is 63 bytes (1 + 62, or 31 data bytes); 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds always an odd number for the total message length. 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If there is no parity, the format is simply: 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RQSTACK DAT DAT DAT ... 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds with a total data length of 63. 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB IN (USA28 -> host, receive) messages contain data and parity 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if parity is configred, thusly: 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DAT PAR DAT PAR DAT PAR ... 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for a total of 32 data bytes; 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If parity is not configured, the format is: 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DAT DAT DAT ... 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for a total of 64 data bytes. 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds In the TX messages (USB OUT), the 0x01 bit of the PARity byte is 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the parity bit. In the RX messages (USB IN), the PARity byte is 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the content of the 8051's status register; the parity bit 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (RX_PARITY_BIT) is the 0x04 bit. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds revision history: 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1999may06 add resetDataToggle to control message 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2000mar21 add rs232invalid to status response message 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2000apr04 add 230.4Kb definition to setBaudRate 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2000apr13 add/remove loopbackMode switch 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2000apr13 change definition of setBaudRate to cover 115.2Kb, too 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2000jun01 add extended BSD-style copyright text 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef __USA28MSG__ 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define __USA28MSG__ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct keyspan_usa28_portControlMessage 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds there are four types of "commands" sent in the control message: 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1. configuration changes which must be requested by setting 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the corresponding "set" flag (and should only be requested 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds when necessary, to reduce overhead on the USA28): 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 setBaudRate, // 0=don't set, 1=baudLo/Hi, 2=115.2K, 3=230.4K 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds baudLo, // host does baud divisor calculation 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds baudHi; // baudHi is only used for first port (gives lower rates) 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2. configuration changes which are done every time (because it's 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hardly more trouble to do them than to check whether to do them): 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 parity, // 1=use parity, 0=don't 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctsFlowControl, // all except 19Q: 1=use CTS flow control, 0=don't 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // 19Q: 0x08:CTSflowControl 0x10:DSRflowControl 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xonFlowControl, // 1=use XON/XOFF flow control, 0=don't 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rts, // 1=on, 0=off 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dtr; // 1=on, 0=off 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3. configuration data which is simply used as is (no overhead, 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds but must be correct in every host message). 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 forwardingLength, // forward when this number of chars available 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds forwardMs, // forward this many ms after last rx data 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds breakThreshold, // specified in ms, 1-255 (see note below) 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xonChar, // specified in current character format 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xoffChar; // specified in current character format 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4. commands which are flags only; these are processed in order 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (so that, e.g., if both _txOn and _txOff flags are set, the 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds port ends in a TX_OFF state); any non-zero value is respected 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 _txOn, // enable transmitting (and continue if there's data) 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _txOff, // stop transmitting 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds txFlush, // toss outbound data 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds txForceXoff, // pretend we've received XOFF 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds txBreak, // turn on break (leave on until txOn clears it) 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxOn, // turn on receiver 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxOff, // turn off receiver 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxFlush, // toss inbound data 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxForward, // forward all inbound data, NOW 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds returnStatus, // return current status n times (1 or 2) 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resetDataToggle;// reset data toggle state to DATA0 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct keyspan_usa28_portStatusMessage 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 port, // 0=first, 1=second, 2=global (see below) 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cts, 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dsr, // (not used in all products) 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dcd, 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ri, // (not used in all products) 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _txOff, // port has been disabled (by host) 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds _txXoff, // port is in XOFF state (either host or RX XOFF) 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dataLost, // count of lost chars; wraps; not guaranteed exact 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxEnabled, // as configured by rxOn/rxOff 1=on, 0=off 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rxBreak, // 1=we're in break state 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rs232invalid, // 1=no valid signals on rs-232 inputs 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds controlResponse;// 1=a control messages has been processed 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// bit defines in txState 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TX_OFF 0x01 // requested by host txOff command 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TX_XOFF 0x02 // either real, or simulated by host 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct keyspan_usa28_globalControlMessage 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 sendGlobalStatus, // 2=request for two status responses 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resetStatusToggle, // 1=reset global status toggle 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resetStatusCount; // a cycling value 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct keyspan_usa28_globalStatusMessage 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 port, // 3 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sendGlobalStatus, // from request, decremented 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resetStatusCount; // as in request 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct keyspan_usa28_globalDebugMessage 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 port, // 2 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n, // typically a count/status byte 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b; // typically a data byte 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// ie: the maximum length of an EZUSB endpoint buffer 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_DATA_LEN 64 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// the parity bytes have only one significant bit 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define RX_PARITY_BIT 0x04 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define TX_PARITY_BIT 0x01 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds// update status approx. 60 times a second (16.6666 ms) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STATUS_UPDATE_INTERVAL 16 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 202