adb.c revision 1.60
1 /* $NetBSD: adb.c,v 1.60 2024/09/14 20:56:50 nat Exp $ */ 2 3 /* 4 * Copyright (C) 1994 Bradley A. Grantham 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: adb.c,v 1.60 2024/09/14 20:56:50 nat Exp $"); 30 31 #include "opt_adb.h" 32 33 #include <sys/param.h> 34 #include <sys/device.h> 35 #include <sys/fcntl.h> 36 #include <sys/poll.h> 37 #include <sys/select.h> 38 #include <sys/proc.h> 39 #include <sys/signalvar.h> 40 #include <sys/systm.h> 41 #include <sys/cpu.h> 42 #include <sys/intr.h> 43 44 #include <machine/autoconf.h> 45 46 #include <mac68k/mac68k/macrom.h> 47 #include <mac68k/dev/adbvar.h> 48 #include <mac68k/dev/akbdvar.h> 49 50 #include "aed.h" /* ADB Event Device for compatibility */ 51 52 /* 53 * Function declarations. 54 */ 55 static int adbmatch(device_t, cfdata_t, void *); 56 static void adbattach(device_t, device_t, void *); 57 static int adbprint(void *, const char *); 58 void adb_config_interrupts(device_t); 59 60 extern void adb_jadbproc(void); 61 62 /* 63 * Global variables. 64 */ 65 int adb_polling = 0; /* Are we polling? (Debugger mode) */ 66 #ifdef ADB_DEBUG 67 int adb_debug = 0; /* Output debugging messages */ 68 #endif /* ADB_DEBUG */ 69 70 extern struct mac68k_machine_S mac68k_machine; 71 extern int adbHardware; 72 extern char *adbHardwareDescr[]; 73 74 /* 75 * Driver definition. 76 */ 77 CFATTACH_DECL_NEW(adb, 0, 78 adbmatch, adbattach, NULL, NULL); 79 80 static int 81 adbmatch(device_t parent, cfdata_t cf, void *aux) 82 { 83 static bool adb_matched; 84 85 /* Allow only one instance. */ 86 if (adb_matched) 87 return (0); 88 89 adb_matched = true; 90 return (1); 91 } 92 93 static void 94 adbattach(device_t parent, device_t self, void *aux) 95 { 96 97 printf("... Waiting 5 seconds for adb devices to settle."); 98 kpause("adb-slp", false, mstohz(5000), NULL); 99 100 adb_softintr_cookie = softint_establish(SOFTINT_SERIAL, 101 (void (*)(void *))adb_soft_intr, NULL); 102 printf("\n"); 103 104 /* 105 * Defer configuration until interrupts are enabled. 106 */ 107 config_interrupts(self, adb_config_interrupts); 108 } 109 110 void 111 adb_config_interrupts(device_t self) 112 { 113 ADBDataBlock adbdata; 114 struct adb_attach_args aa_args; 115 int totaladbs; 116 int adbindex, adbaddr; 117 118 printf("%s", device_xname(self)); 119 adb_polling = 1; 120 121 #ifdef MRG_ADB 122 if (!mrg_romready()) { 123 printf(": no ROM ADB driver in this kernel for this machine\n"); 124 return; 125 } 126 127 #ifdef ADB_DEBUG 128 if (adb_debug) 129 printf("adb: call mrg_initadbintr\n"); 130 #endif 131 132 mrg_initadbintr(); /* Mac ROM Glue okay to do ROM intr */ 133 #ifdef ADB_DEBUG 134 if (adb_debug) 135 printf("adb: returned from mrg_initadbintr\n"); 136 #endif 137 138 /* ADBReInit pre/post-processing */ 139 JADBProc = adb_jadbproc; 140 141 /* Initialize ADB */ 142 #ifdef ADB_DEBUG 143 if (adb_debug) 144 printf("adb: calling ADBAlternateInit.\n"); 145 #endif 146 147 printf(" (mrg)"); 148 ADBAlternateInit(); 149 #else 150 ADBReInit(); 151 printf(" (direct, %s)", adbHardwareDescr[adbHardware]); 152 #endif /* MRG_ADB */ 153 154 #ifdef ADB_DEBUG 155 if (adb_debug) 156 printf("adb: done with ADBReInit\n"); 157 #endif 158 159 totaladbs = CountADBs(); 160 161 printf(": %d target%s\n", totaladbs, (totaladbs == 1) ? "" : "s"); 162 163 #if NAED > 0 164 /* ADB event device for compatibility */ 165 aa_args.origaddr = 0; 166 aa_args.adbaddr = 0; 167 aa_args.handler_id = 0; 168 (void)config_found(self, &aa_args, adbprint, CFARGS_NONE); 169 #endif 170 171 /* for each ADB device */ 172 for (adbindex = 1; adbindex <= totaladbs; adbindex++) { 173 /* Get the ADB information */ 174 adbaddr = GetIndADB(&adbdata, adbindex); 175 176 aa_args.origaddr = (int)(adbdata.origADBAddr); 177 aa_args.adbaddr = adbaddr; 178 aa_args.handler_id = (int)(adbdata.devType); 179 180 (void)config_found(self, &aa_args, adbprint, CFARGS_NONE); 181 } 182 adb_polling = 0; 183 } 184 185 186 int 187 adbprint(void *args, const char *name) 188 { 189 struct adb_attach_args *aa_args = (struct adb_attach_args *)args; 190 int rv = UNCONF; 191 192 if (name) { /* no configured device matched */ 193 rv = UNSUPP; /* most ADB device types are unsupported */ 194 195 /* print out what kind of ADB device we have found */ 196 aprint_normal("%s addr %d: ", name, aa_args->adbaddr); 197 switch(aa_args->origaddr) { 198 case 0: 199 #ifdef DIAGNOSTIC 200 aprint_normal("ADB event device"); 201 #endif 202 rv = UNCONF; 203 break; 204 #ifdef DIAGNOSTIC 205 case ADBADDR_SECURE: 206 aprint_normal("security dongle (%d)", 207 aa_args->handler_id); 208 break; 209 #endif 210 case ADBADDR_MAP: 211 aprint_normal("mapped device (%d)", 212 aa_args->handler_id); 213 rv = UNCONF; 214 break; 215 case ADBADDR_REL: 216 aprint_normal("relative positioning device (%d)", 217 aa_args->handler_id); 218 rv = UNCONF; 219 break; 220 #ifdef DIAGNOSTIC 221 case ADBADDR_ABS: 222 switch (aa_args->handler_id) { 223 case ADB_ARTPAD: 224 aprint_normal("WACOM ArtPad II"); 225 break; 226 default: 227 aprint_normal("absolute positioning device (%d)", 228 aa_args->handler_id); 229 break; 230 } 231 break; 232 case ADBADDR_DATATX: 233 aprint_normal("data transfer device (modem?) (%d)", 234 aa_args->handler_id); 235 break; 236 case ADBADDR_MISC: 237 switch (aa_args->handler_id) { 238 case ADB_POWERKEY: 239 aprint_normal("Sophisticated Circuits PowerKey"); 240 break; 241 default: 242 aprint_normal("misc. device (remote control?) (%d)", 243 aa_args->handler_id); 244 break; 245 } 246 break; 247 default: 248 aprint_normal("unknown type device, (handler %d)", 249 aa_args->handler_id); 250 break; 251 #endif /* DIAGNOSTIC */ 252 } 253 } else /* a device matched and was configured */ 254 aprint_normal(" addr %d: ", aa_args->adbaddr); 255 256 return (rv); 257 } 258 259 260 /* 261 * adb_op_sync 262 * 263 * This routine does exactly what the adb_op routine does, except that after 264 * the adb_op is called, it waits until the return value is present before 265 * returning. 266 * 267 * NOTE: The user specified compRout is ignored, since this routine specifies 268 * its own to adb_op, which is why you really called this in the first place 269 * anyway. 270 */ 271 int 272 adb_op_sync(Ptr buffer, Ptr compRout, Ptr data, short command) 273 { 274 int result; 275 volatile int flag = 0; 276 277 result = ADBOp(buffer, (void *)adb_op_comprout, __UNVOLATILE(&flag), 278 command); /* send command */ 279 if (result == 0) { /* send ok? */ 280 adb_spin(&flag); 281 if (!flag) 282 result = -2; 283 } 284 285 return result; 286 } 287 288 /* 289 * adb_spin 290 * 291 * Implements a spin-wait with timeout to be used for synchronous 292 * operations on the ADB bus. 293 * 294 * Total time to wait is calculated as follows: 295 * - Tlt (stop to start time): 260 usec 296 * - start bit: 100 usec 297 * - up to 8 data bytes: 64 * 100 usec = 6400 usec 298 * - stop bit (with SRQ): 140 usec 299 * Total: 6900 usec 300 * 301 * This is the total time allowed by the specification. Any device that 302 * doesn't conform to this will fail to operate properly on some Apple 303 * systems. In spite of this we double the time to wait; Cuda-based 304 * systems apparently queue commands and allow the main CPU to continue 305 * processing (how radical!). To be safe, allow time for two complete 306 * ADB transactions to occur. 307 */ 308 void 309 adb_spin(volatile int *fp) 310 { 311 int tmout; 312 313 for (tmout = 13800; *fp == 0 && tmout >= 10; tmout -= 10) 314 delay(10); 315 if (*fp == 0 && tmout > 0) 316 delay(tmout); 317 } 318 319 320 /* 321 * adb_op_comprout 322 * 323 * This function is used by the adb_op_sync routine so it knows when the 324 * function is done. 325 */ 326 void 327 adb_op_comprout(void) 328 { 329 __asm("movw #1,%a2@ | update flag value"); 330 } 331
Indexes created Mon Sep 22 10:09:38 GMT 2025