1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * 3-Byte Mouse Protocol 28 */ 29 30 #include <sys/param.h> 31 #include <sys/stream.h> 32 #include <sys/strsun.h> 33 #include <sys/vuid_event.h> 34 #include "vuidmice.h" 35 36 #define VUID_BUT(b) BUT((b*2)+1) 37 38 /* 39 * VUID_BUT(0) BUT(1) LEFT BUTTON 40 * VUID_BUT(1) BUT(3) RIGHT BUTTON 41 */ 42 43 #define MOUSE_BUTTON_L (uchar_t)(0x20) /* Left button pressed */ 44 #define MOUSE_BUTTON_R (uchar_t)(0x10) /* Right button pressed */ 45 46 #define MOUSE_START_CODE (uchar_t)(0x40) /* Start code in char */ 47 48 #define MOUSE_START 0 /* Beginning of packet */ 49 #define MOUSE_BUTTON 1 /* Got button status */ 50 #define MOUSE_DELTA_X 2 /* got delta X */ 51 52 extern void VUID_PUTNEXT(queue_t *const, uchar_t, uchar_t, uchar_t, int); 53 54 int 55 VUID_OPEN(queue_t *const qp) 56 { 57 STATEP->nbuttons = 2; 58 59 return (0); 60 } 61 62 static void 63 vuidm3p_sendButtonEvent(queue_t *const qp) 64 { 65 int b; 66 67 if ((STATEP->buttons == 0x30) && (!STATEP->oldbuttons)) { 68 /* 69 * both buttons going down simultaneously means button 70 * two going down 71 */ 72 vuidm3p_putnext(qp, (uchar_t)MS_MIDDLE, FE_PAIR_NONE, 0, 1); 73 return; 74 } else if ((!STATEP->buttons) && (STATEP->oldbuttons == 0x30)) { 75 /* 76 * both buttons going up simultaneously means button 77 * two going up 78 */ 79 vuidm3p_putnext(qp, (uchar_t)MS_MIDDLE, FE_PAIR_NONE, 0, 0); 80 return; 81 } 82 83 /* 84 * for each button, see if it has changed 85 */ 86 for (b = 0; b < 2; b++) { 87 uchar_t mask = 0x20 >> b; 88 89 if ((STATEP->buttons & mask) != (STATEP->oldbuttons & mask)) 90 VUID_PUTNEXT(qp, VUID_BUT(b), FE_PAIR_NONE, 0, 91 (STATEP->buttons & mask ? 1 : 0)); 92 } 93 } 94 95 void 96 vuidm3p(queue_t *const qp, mblk_t *mp) 97 { 98 int r, code; 99 uchar_t *bufp; 100 101 bufp = mp->b_rptr; 102 r = MBLKL(mp); 103 104 for (r--; r >= 0; r--) { 105 code = *bufp++; 106 107 /* strip the high-order bit (mouse sends 7-bit data) */ 108 code &= 0x7f; 109 110 switch (STATEP->state) { 111 112 /* 113 * Start state. We stay here if the start code is not 114 * received thus forcing us back into sync. When we 115 * get a start code the button mask comes with it 116 * forcing us to the next state. 117 */ 118 119 default: 120 case MOUSE_START: 121 start_code: 122 STATEP->deltax = STATEP->deltay = 0; 123 124 /* look for sync */ 125 if ((code & MOUSE_START_CODE) == 0) 126 break; 127 128 STATEP->buttons = code & 0x30; 129 130 if (STATEP->buttons != STATEP->oldbuttons) { 131 vuidm3p_sendButtonEvent(qp); 132 /* 133 * remember state 134 */ 135 STATEP->oldbuttons = STATEP->buttons; 136 } 137 138 /* 139 * bits 0 & 1 are bits 6 & 7 of X value 140 * (Sign extend them with the cast.) 141 */ 142 STATEP->deltax = (signed char)((code & 0x03) << 6); 143 144 /* 145 * bits 2 & 3 are bits 6 & 7 of Y value 146 * (Sign extend them with the cast.) 147 */ 148 STATEP->deltay = (signed char)((code & 0x0c) << 4); 149 150 /* 151 * go to the next state 152 */ 153 STATEP->state = MOUSE_BUTTON; 154 break; 155 156 /* 157 * We receive the remaining 6 bits of delta x, forcing 158 * us to the next state. We just piece the value of 159 * delta x together. 160 */ 161 case MOUSE_BUTTON: 162 if (code & MOUSE_START_CODE) { 163 STATEP->state = MOUSE_START; 164 goto start_code; /* restart */ 165 } 166 167 STATEP->deltax |= code & 0x3f; 168 STATEP->state = MOUSE_DELTA_X; 169 break; 170 171 /* 172 * The last part of delta Y, and the packet 173 * *may be* complete 174 */ 175 case MOUSE_DELTA_X: 176 if (code & MOUSE_START_CODE) { 177 STATEP->state = MOUSE_START; 178 goto start_code; /* restart */ 179 } 180 181 STATEP->deltay |= code & 0x3f; 182 183 /* 184 * generate motion Event 185 */ 186 if (STATEP->deltax) 187 VUID_PUTNEXT(qp, (uchar_t)LOC_X_DELTA, 188 FE_PAIR_ABSOLUTE, (uchar_t)LOC_X_ABSOLUTE, 189 STATEP->deltax); 190 191 if (STATEP->deltay) 192 VUID_PUTNEXT(qp, (uchar_t)LOC_Y_DELTA, 193 FE_PAIR_ABSOLUTE, (uchar_t)LOC_Y_ABSOLUTE, 194 -STATEP->deltay); 195 196 STATEP->deltax = STATEP->deltay = 0; 197 break; 198 } 199 } 200 201 freemsg(mp); 202 } 203