582434bd08
my right mouse button and keyboard LEDs from working due to mangled configuration packets. Fixed several other races and associated problems in the main ADB stack that were exposed while fixing this.
405 lines
9.7 KiB
C
405 lines
9.7 KiB
C
/*-
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* Copyright (C) 2008 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <machine/bus.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include "adb.h"
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#include "adbvar.h"
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static int adb_bus_probe(device_t dev);
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static int adb_bus_attach(device_t dev);
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static int adb_bus_detach(device_t dev);
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static void adb_bus_enumerate(void *xdev);
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static void adb_probe_nomatch(device_t dev, device_t child);
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static int adb_print_child(device_t dev, device_t child);
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static int adb_send_raw_packet_sync(device_t dev, uint8_t to, uint8_t command, uint8_t reg, int len, u_char *data, u_char *reply);
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static char *adb_device_string[] = {
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"HOST", "dongle", "keyboard", "mouse", "tablet", "modem", "RESERVED", "misc"
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};
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static device_method_t adb_bus_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, adb_bus_probe),
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DEVMETHOD(device_attach, adb_bus_attach),
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DEVMETHOD(device_detach, adb_bus_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* Bus Interface */
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DEVMETHOD(bus_probe_nomatch, adb_probe_nomatch),
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DEVMETHOD(bus_print_child, adb_print_child),
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{ 0, 0 },
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};
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driver_t adb_driver = {
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"adb",
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adb_bus_methods,
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sizeof(struct adb_softc),
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};
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devclass_t adb_devclass;
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static int
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adb_bus_probe(device_t dev)
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{
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device_set_desc(dev, "Apple Desktop Bus");
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return (0);
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}
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static int
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adb_bus_attach(device_t dev)
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{
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struct adb_softc *sc = device_get_softc(dev);
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sc->enum_hook.ich_func = adb_bus_enumerate;
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sc->enum_hook.ich_arg = dev;
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/*
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* We should wait until interrupts are enabled to try to probe
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* the bus. Enumerating the ADB involves receiving packets,
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* which works best with interrupts enabled.
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*/
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if (config_intrhook_establish(&sc->enum_hook) != 0)
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return (ENOMEM);
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return (0);
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}
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static void
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adb_bus_enumerate(void *xdev)
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{
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device_t dev = (device_t)xdev;
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struct adb_softc *sc = device_get_softc(dev);
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uint8_t i, next_free;
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uint16_t r3;
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sc->sc_dev = dev;
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sc->parent = device_get_parent(dev);
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sc->packet_reply = 0;
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sc->autopoll_mask = 0;
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sc->sync_packet = 0xffff;
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/* Initialize devinfo */
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for (i = 0; i < 16; i++) {
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sc->devinfo[i].address = i;
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sc->devinfo[i].default_address = 0;
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}
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/* Reset ADB bus */
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adb_send_raw_packet_sync(dev,0,ADB_COMMAND_BUS_RESET,0,0,NULL,NULL);
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DELAY(1500);
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/* Enumerate bus */
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next_free = 8;
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for (i = 1; i <= 7; i++) {
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int8_t first_relocated = -1;
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int reply = 0;
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do {
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reply = adb_send_raw_packet_sync(dev,i,
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ADB_COMMAND_TALK,3,0,NULL,NULL);
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if (reply) {
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/* If we got a response, relocate to next_free */
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r3 = sc->devinfo[i].register3;
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r3 &= 0xf000;
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r3 |= ((uint16_t)(next_free) & 0x000f) << 8;
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r3 |= 0x00fe;
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adb_send_raw_packet_sync(dev,i, ADB_COMMAND_LISTEN,3,
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sizeof(uint16_t),(u_char *)(&r3),NULL);
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adb_send_raw_packet_sync(dev,next_free,
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ADB_COMMAND_TALK,3,0,NULL,NULL);
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sc->devinfo[next_free].default_address = i;
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if (first_relocated < 0)
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first_relocated = next_free;
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next_free++;
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} else if (first_relocated > 0) {
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/* Collisions removed, relocate first device back */
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r3 = sc->devinfo[i].register3;
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r3 &= 0xf000;
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r3 |= ((uint16_t)(i) & 0x000f) << 8;
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adb_send_raw_packet_sync(dev,first_relocated,
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ADB_COMMAND_LISTEN,3,
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sizeof(uint16_t),(u_char *)(&r3),NULL);
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adb_send_raw_packet_sync(dev,i,
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ADB_COMMAND_TALK,3,0,NULL,NULL);
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sc->devinfo[i].default_address = i;
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sc->devinfo[(int)(first_relocated)].default_address = 0;
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break;
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}
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} while (reply);
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}
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for (i = 0; i < 16; i++) {
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if (sc->devinfo[i].default_address) {
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sc->children[i] = device_add_child(dev, NULL, -1);
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device_set_ivars(sc->children[i], &sc->devinfo[i]);
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}
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}
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bus_generic_attach(dev);
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config_intrhook_disestablish(&sc->enum_hook);
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}
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static int adb_bus_detach(device_t dev)
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{
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return (bus_generic_detach(dev));
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}
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static void
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adb_probe_nomatch(device_t dev, device_t child)
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{
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struct adb_devinfo *dinfo;
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if (bootverbose) {
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dinfo = device_get_ivars(child);
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device_printf(dev,"ADB %s at device %d (no driver attached)\n",
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adb_device_string[dinfo->default_address],dinfo->address);
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}
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}
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u_int
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adb_receive_raw_packet(device_t dev, u_char status, u_char command, int len,
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u_char *data)
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{
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struct adb_softc *sc = device_get_softc(dev);
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u_char addr = command >> 4;
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if (len > 0 && (command & 0x0f) == ((ADB_COMMAND_TALK << 2) | 3)) {
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memcpy(&sc->devinfo[addr].register3,data,2);
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sc->devinfo[addr].handler_id = data[1];
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}
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if (sc->sync_packet == command) {
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memcpy(sc->syncreg,data,(len > 8) ? 8 : len);
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atomic_store_rel_int(&sc->packet_reply,len + 1);
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wakeup(sc);
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}
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if (sc->children[addr] != NULL) {
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ADB_RECEIVE_PACKET(sc->children[addr],status,
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(command & 0x0f) >> 2,command & 0x03,len,data);
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}
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return (0);
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}
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static int
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adb_print_child(device_t dev, device_t child)
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{
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struct adb_devinfo *dinfo;
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int retval = 0;
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dinfo = device_get_ivars(child);
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retval += bus_print_child_header(dev,child);
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printf(" at device %d",dinfo->address);
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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u_int
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adb_send_packet(device_t dev, u_char command, u_char reg, int len, u_char *data)
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{
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u_char command_byte = 0;
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struct adb_devinfo *dinfo;
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struct adb_softc *sc;
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sc = device_get_softc(device_get_parent(dev));
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dinfo = device_get_ivars(dev);
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command_byte |= dinfo->address << 4;
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command_byte |= command << 2;
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command_byte |= reg;
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ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte, len, data, 1);
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return (0);
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}
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u_int
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adb_set_autopoll(device_t dev, u_char enable)
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{
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struct adb_devinfo *dinfo;
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struct adb_softc *sc;
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uint16_t mod = 0;
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sc = device_get_softc(device_get_parent(dev));
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dinfo = device_get_ivars(dev);
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mod = enable << dinfo->address;
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if (enable) {
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sc->autopoll_mask |= mod;
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} else {
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mod = ~mod;
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sc->autopoll_mask &= mod;
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}
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ADB_HB_SET_AUTOPOLL_MASK(sc->parent,sc->autopoll_mask);
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return (0);
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}
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uint8_t
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adb_get_device_type(device_t dev)
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{
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struct adb_devinfo *dinfo;
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dinfo = device_get_ivars(dev);
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return (dinfo->default_address);
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}
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uint8_t
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adb_get_device_handler(device_t dev)
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{
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struct adb_devinfo *dinfo;
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dinfo = device_get_ivars(dev);
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return (dinfo->handler_id);
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}
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static int
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adb_send_raw_packet_sync(device_t dev, uint8_t to, uint8_t command,
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uint8_t reg, int len, u_char *data, u_char *reply)
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{
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u_char command_byte = 0;
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struct adb_softc *sc;
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int result = -1;
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int i = 1;
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sc = device_get_softc(dev);
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command_byte |= to << 4;
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command_byte |= command << 2;
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command_byte |= reg;
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/* Wait if someone else has a synchronous request pending */
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while (!atomic_cmpset_int(&sc->sync_packet, 0xffff, command_byte))
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tsleep(sc, 0, "ADB sync", hz/10);
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sc->packet_reply = 0;
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sc->sync_packet = command_byte;
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ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte, len, data, 1);
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while (!atomic_fetchadd_int(&sc->packet_reply,0)) {
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/*
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* Maybe the command got lost? Try resending and polling the
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* controller.
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*/
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if (i % 40 == 0)
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ADB_HB_SEND_RAW_PACKET(sc->parent, command_byte,
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len, data, 1);
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tsleep(sc, 0, "ADB sync", hz/10);
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i++;
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}
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result = sc->packet_reply - 1;
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if (reply != NULL && result > 0)
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memcpy(reply,sc->syncreg,result);
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/* Clear packet sync */
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sc->packet_reply = 0;
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/*
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* We can't match a value beyond 8 bits, so set sync_packet to
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* 0xffff to avoid collisions.
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*/
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atomic_set_int(&sc->sync_packet, 0xffff);
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return (result);
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}
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uint8_t
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adb_set_device_handler(device_t dev, uint8_t newhandler)
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{
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struct adb_softc *sc;
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struct adb_devinfo *dinfo;
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uint16_t newr3;
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dinfo = device_get_ivars(dev);
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sc = device_get_softc(device_get_parent(dev));
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newr3 = dinfo->register3 & 0xff00;
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newr3 |= (uint16_t)(newhandler);
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adb_send_raw_packet_sync(sc->sc_dev,dinfo->address, ADB_COMMAND_LISTEN,
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3, sizeof(uint16_t), (u_char *)(&newr3), NULL);
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adb_send_raw_packet_sync(sc->sc_dev,dinfo->address,
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ADB_COMMAND_TALK, 3, 0, NULL, NULL);
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return (dinfo->handler_id);
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}
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size_t
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adb_read_register(device_t dev, u_char reg, void *data)
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{
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struct adb_softc *sc;
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struct adb_devinfo *dinfo;
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size_t result;
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dinfo = device_get_ivars(dev);
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sc = device_get_softc(device_get_parent(dev));
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result = adb_send_raw_packet_sync(sc->sc_dev,dinfo->address,
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ADB_COMMAND_TALK, reg, 0, NULL, data);
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return (result);
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}
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