NetBSD-5.0.2/sys/arch/mac68k/dev/adb.c
/* $NetBSD: adb.c,v 1.52 2008/04/03 05:03:23 scottr Exp $ */
/*
* Copyright (C) 1994 Bradley A. Grantham
* All rights reserved.
*
* 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 the above copyright
* notice, this list of conditions and the following disclaimer.
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bradley A. Grantham.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: adb.c,v 1.52 2008/04/03 05:03:23 scottr Exp $");
#include "opt_adb.h"
#include <sys/param.h>
#include <sys/device.h>
#include <sys/fcntl.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/cpu.h>
#include <sys/intr.h>
#include <machine/autoconf.h>
#include <mac68k/mac68k/macrom.h>
#include <mac68k/dev/adbvar.h>
#include <mac68k/dev/akbdvar.h>
#include "aed.h" /* ADB Event Device for compatibility */
/*
* Function declarations.
*/
static int adbmatch(struct device *, struct cfdata *, void *);
static void adbattach(struct device *, struct device *, void *);
static int adbprint(void *, const char *);
void adb_config_interrupts(struct device *);
extern void adb_jadbproc(void);
/*
* Global variables.
*/
int adb_polling = 0; /* Are we polling? (Debugger mode) */
#ifdef ADB_DEBUG
int adb_debug = 0; /* Output debugging messages */
#endif /* ADB_DEBUG */
extern struct mac68k_machine_S mac68k_machine;
extern int adbHardware;
extern char *adbHardwareDescr[];
/*
* Driver definition.
*/
CFATTACH_DECL(adb, sizeof(struct device),
adbmatch, adbattach, NULL, NULL);
static int
adbmatch(struct device *parent, struct cfdata *cf, void *aux)
{
static int adb_matched = 0;
/* Allow only one instance. */
if (adb_matched)
return (0);
adb_matched = 1;
return (1);
}
static void
adbattach(struct device *parent, struct device *self, void *aux)
{
adb_softintr_cookie = softint_establish(SOFTINT_SERIAL,
(void (*)(void *))adb_soft_intr, NULL);
printf("\n");
/*
* Defer configuration until interrupts are enabled.
*/
config_interrupts(self, adb_config_interrupts);
}
void
adb_config_interrupts(struct device *self)
{
ADBDataBlock adbdata;
struct adb_attach_args aa_args;
int totaladbs;
int adbindex, adbaddr;
printf("%s", self->dv_xname);
adb_polling = 1;
#ifdef MRG_ADB
if (!mrg_romready()) {
printf(": no ROM ADB driver in this kernel for this machine\n");
return;
}
#ifdef ADB_DEBUG
if (adb_debug)
printf("adb: call mrg_initadbintr\n");
#endif
mrg_initadbintr(); /* Mac ROM Glue okay to do ROM intr */
#ifdef ADB_DEBUG
if (adb_debug)
printf("adb: returned from mrg_initadbintr\n");
#endif
/* ADBReInit pre/post-processing */
JADBProc = adb_jadbproc;
/* Initialize ADB */
#ifdef ADB_DEBUG
if (adb_debug)
printf("adb: calling ADBAlternateInit.\n");
#endif
printf(" (mrg)");
ADBAlternateInit();
#else
ADBReInit();
printf(" (direct, %s)", adbHardwareDescr[adbHardware]);
#endif /* MRG_ADB */
#ifdef ADB_DEBUG
if (adb_debug)
printf("adb: done with ADBReInit\n");
#endif
totaladbs = CountADBs();
printf(": %d target%s\n", totaladbs, (totaladbs == 1) ? "" : "s");
#if NAED > 0
/* ADB event device for compatibility */
aa_args.origaddr = 0;
aa_args.adbaddr = 0;
aa_args.handler_id = 0;
(void)config_found(self, &aa_args, adbprint);
#endif
/* for each ADB device */
for (adbindex = 1; adbindex <= totaladbs; adbindex++) {
/* Get the ADB information */
adbaddr = GetIndADB(&adbdata, adbindex);
aa_args.origaddr = (int)(adbdata.origADBAddr);
aa_args.adbaddr = adbaddr;
aa_args.handler_id = (int)(adbdata.devType);
(void)config_found(self, &aa_args, adbprint);
}
adb_polling = 0;
}
int
adbprint(void *args, const char *name)
{
struct adb_attach_args *aa_args = (struct adb_attach_args *)args;
int rv = UNCONF;
if (name) { /* no configured device matched */
rv = UNSUPP; /* most ADB device types are unsupported */
/* print out what kind of ADB device we have found */
aprint_normal("%s addr %d: ", name, aa_args->adbaddr);
switch(aa_args->origaddr) {
#ifdef DIAGNOSTIC
case 0:
aprint_normal("ADB event device");
rv = UNCONF;
break;
case ADBADDR_SECURE:
aprint_normal("security dongle (%d)",
aa_args->handler_id);
break;
#endif
case ADBADDR_MAP:
aprint_normal("mapped device (%d)",
aa_args->handler_id);
rv = UNCONF;
break;
case ADBADDR_REL:
aprint_normal("relative positioning device (%d)",
aa_args->handler_id);
rv = UNCONF;
break;
#ifdef DIAGNOSTIC
case ADBADDR_ABS:
switch (aa_args->handler_id) {
case ADB_ARTPAD:
aprint_normal("WACOM ArtPad II");
break;
default:
aprint_normal("absolute positioning device (%d)",
aa_args->handler_id);
break;
}
break;
case ADBADDR_DATATX:
aprint_normal("data transfer device (modem?) (%d)",
aa_args->handler_id);
break;
case ADBADDR_MISC:
switch (aa_args->handler_id) {
case ADB_POWERKEY:
aprint_normal("Sophisticated Circuits PowerKey");
break;
default:
aprint_normal("misc. device (remote control?) (%d)",
aa_args->handler_id);
break;
}
break;
default:
aprint_normal("unknown type device, (handler %d)",
aa_args->handler_id);
break;
#endif /* DIAGNOSTIC */
}
} else /* a device matched and was configured */
aprint_normal(" addr %d: ", aa_args->adbaddr);
return (rv);
}
/*
* adb_op_sync
*
* This routine does exactly what the adb_op routine does, except that after
* the adb_op is called, it waits until the return value is present before
* returning.
*
* NOTE: The user specified compRout is ignored, since this routine specifies
* it's own to adb_op, which is why you really called this in the first place
* anyway.
*/
int
adb_op_sync(Ptr buffer, Ptr compRout, Ptr data, short command)
{
int result;
volatile int flag = 0;
result = ADBOp(buffer, (void *)adb_op_comprout, __UNVOLATILE(&flag),
command); /* send command */
if (result == 0) { /* send ok? */
adb_spin(&flag);
if (!flag)
result = -2;
}
return result;
}
/*
* adb_spin
*
* Implements a spin-wait with timeout to be used for synchronous
* operations on the ADB bus.
*
* Total time to wait is calculated as follows:
* - Tlt (stop to start time): 260 usec
* - start bit: 100 usec
* - up to 8 data bytes: 64 * 100 usec = 6400 usec
* - stop bit (with SRQ): 140 usec
* Total: 6900 usec
*
* This is the total time allowed by the specification. Any device that
* doesn't conform to this will fail to operate properly on some Apple
* systems. In spite of this we double the time to wait; Cuda-based
* systems apparently queue commands and allow the main CPU to continue
* processing (how radical!). To be safe, allow time for two complete
* ADB transactions to occur.
*/
void
adb_spin(volatile int *fp)
{
int tmout;
for (tmout = 13800; *fp == 0 && tmout >= 10; tmout -= 10)
delay(10);
if (*fp == 0 && tmout > 0)
delay(tmout);
}
/*
* adb_op_comprout
*
* This function is used by the adb_op_sync routine so it knows when the
* function is done.
*/
void
adb_op_comprout(void)
{
__asm("movw #1,%a2@ | update flag value");
}