adb.c revision 1.56
1 /* $NetBSD: adb.c,v 1.56 2014/10/18 08:33:25 snj 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 1.56 2014/10/18 08:33:25 snj 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 adb_softintr_cookie = softint_establish(SOFTINT_SERIAL, 98 (void (*)(void *))adb_soft_intr, NULL); 99 printf("\n"); 100 101 /* 102 * Defer configuration until interrupts are enabled. 103 */ 104 config_interrupts(self, adb_config_interrupts); 105 } 106 107 void 108 adb_config_interrupts(device_t self) 109 { 110 ADBDataBlock adbdata; 111 struct adb_attach_args aa_args; 112 int totaladbs; 113 int adbindex, adbaddr; 114 115 printf("%s", device_xname(self)); 116 adb_polling = 1; 117 118 #ifdef MRG_ADB 119 if (!mrg_romready()) { 120 printf(": no ROM ADB driver in this kernel for this machine\n"); 121 return; 122 } 123 124 #ifdef ADB_DEBUG 125 if (adb_debug) 126 printf("adb: call mrg_initadbintr\n"); 127 #endif 128 129 mrg_initadbintr(); /* Mac ROM Glue okay to do ROM intr */ 130 #ifdef ADB_DEBUG 131 if (adb_debug) 132 printf("adb: returned from mrg_initadbintr\n"); 133 #endif 134 135 /* ADBReInit pre/post-processing */ 136 JADBProc = adb_jadbproc; 137 138 /* Initialize ADB */ 139 #ifdef ADB_DEBUG 140 if (adb_debug) 141 printf("adb: calling ADBAlternateInit.\n"); 142 #endif 143 144 printf(" (mrg)"); 145 ADBAlternateInit(); 146 #else 147 ADBReInit(); 148 printf(" (direct, %s)", adbHardwareDescr[adbHardware]); 149 #endif /* MRG_ADB */ 150 151 #ifdef ADB_DEBUG 152 if (adb_debug) 153 printf("adb: done with ADBReInit\n"); 154 #endif 155 156 totaladbs = CountADBs(); 157 158 printf(": %d target%s\n", totaladbs, (totaladbs == 1) ? "" : "s"); 159 160 #if NAED > 0 161 /* ADB event device for compatibility */ 162 aa_args.origaddr = 0; 163 aa_args.adbaddr = 0; 164 aa_args.handler_id = 0; 165 (void)config_found(self, &aa_args, adbprint); 166 #endif 167 168 /* for each ADB device */ 169 for (adbindex = 1; adbindex <= totaladbs; adbindex++) { 170 /* Get the ADB information */ 171 adbaddr = GetIndADB(&adbdata, adbindex); 172 173 aa_args.origaddr = (int)(adbdata.origADBAddr); 174 aa_args.adbaddr = adbaddr; 175 aa_args.handler_id = (int)(adbdata.devType); 176 177 (void)config_found(self, &aa_args, adbprint); 178 } 179 adb_polling = 0; 180 } 181 182 183 int 184 adbprint(void *args, const char *name) 185 { 186 struct adb_attach_args *aa_args = (struct adb_attach_args *)args; 187 int rv = UNCONF; 188 189 if (name) { /* no configured device matched */ 190 rv = UNSUPP; /* most ADB device types are unsupported */ 191 192 /* print out what kind of ADB device we have found */ 193 aprint_normal("%s addr %d: ", name, aa_args->adbaddr); 194 switch(aa_args->origaddr) { 195 #ifdef DIAGNOSTIC 196 case 0: 197 aprint_normal("ADB event device"); 198 rv = UNCONF; 199 break; 200 case ADBADDR_SECURE: 201 aprint_normal("security dongle (%d)", 202 aa_args->handler_id); 203 break; 204 #endif 205 case ADBADDR_MAP: 206 aprint_normal("mapped device (%d)", 207 aa_args->handler_id); 208 rv = UNCONF; 209 break; 210 case ADBADDR_REL: 211 aprint_normal("relative positioning device (%d)", 212 aa_args->handler_id); 213 rv = UNCONF; 214 break; 215 #ifdef DIAGNOSTIC 216 case ADBADDR_ABS: 217 switch (aa_args->handler_id) { 218 case ADB_ARTPAD: 219 aprint_normal("WACOM ArtPad II"); 220 break; 221 default: 222 aprint_normal("absolute positioning device (%d)", 223 aa_args->handler_id); 224 break; 225 } 226 break; 227 case ADBADDR_DATATX: 228 aprint_normal("data transfer device (modem?) (%d)", 229 aa_args->handler_id); 230 break; 231 case ADBADDR_MISC: 232 switch (aa_args->handler_id) { 233 case ADB_POWERKEY: 234 aprint_normal("Sophisticated Circuits PowerKey"); 235 break; 236 default: 237 aprint_normal("misc. device (remote control?) (%d)", 238 aa_args->handler_id); 239 break; 240 } 241 break; 242 default: 243 aprint_normal("unknown type device, (handler %d)", 244 aa_args->handler_id); 245 break; 246 #endif /* DIAGNOSTIC */ 247 } 248 } else /* a device matched and was configured */ 249 aprint_normal(" addr %d: ", aa_args->adbaddr); 250 251 return (rv); 252 } 253 254 255 /* 256 * adb_op_sync 257 * 258 * This routine does exactly what the adb_op routine does, except that after 259 * the adb_op is called, it waits until the return value is present before 260 * returning. 261 * 262 * NOTE: The user specified compRout is ignored, since this routine specifies 263 * its own to adb_op, which is why you really called this in the first place 264 * anyway. 265 */ 266 int 267 adb_op_sync(Ptr buffer, Ptr compRout, Ptr data, short command) 268 { 269 int result; 270 volatile int flag = 0; 271 272 result = ADBOp(buffer, (void *)adb_op_comprout, __UNVOLATILE(&flag), 273 command); /* send command */ 274 if (result == 0) { /* send ok? */ 275 adb_spin(&flag); 276 if (!flag) 277 result = -2; 278 } 279 280 return result; 281 } 282 283 /* 284 * adb_spin 285 * 286 * Implements a spin-wait with timeout to be used for synchronous 287 * operations on the ADB bus. 288 * 289 * Total time to wait is calculated as follows: 290 * - Tlt (stop to start time): 260 usec 291 * - start bit: 100 usec 292 * - up to 8 data bytes: 64 * 100 usec = 6400 usec 293 * - stop bit (with SRQ): 140 usec 294 * Total: 6900 usec 295 * 296 * This is the total time allowed by the specification. Any device that 297 * doesn't conform to this will fail to operate properly on some Apple 298 * systems. In spite of this we double the time to wait; Cuda-based 299 * systems apparently queue commands and allow the main CPU to continue 300 * processing (how radical!). To be safe, allow time for two complete 301 * ADB transactions to occur. 302 */ 303 void 304 adb_spin(volatile int *fp) 305 { 306 int tmout; 307 308 for (tmout = 13800; *fp == 0 && tmout >= 10; tmout -= 10) 309 delay(10); 310 if (*fp == 0 && tmout > 0) 311 delay(tmout); 312 } 313 314 315 /* 316 * adb_op_comprout 317 * 318 * This function is used by the adb_op_sync routine so it knows when the 319 * function is done. 320 */ 321 void 322 adb_op_comprout(void) 323 { 324 __asm("movw #1,%a2@ | update flag value"); 325 } 326
Indexes created Sun Sep 21 16:09:51 GMT 2025