1050 lines
21 KiB
C
1050 lines
21 KiB
C
/*-
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* Copyright (c) 1997,1998 Doug Rabson
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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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: subr_bus.c,v 1.4 1998/07/22 08:35:52 dfr Exp $
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus_private.h>
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#include <sys/systm.h>
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/*
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* Method table handling
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*/
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static int next_method_offset = 1;
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static int methods_count = 0;
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static int methods_size = 0;
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struct method {
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int offset;
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char* name;
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};
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static struct method *methods = 0;
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static void
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register_method(struct device_op_desc *desc)
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{
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int i;
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struct method* m;
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for (i = 0; i < methods_count; i++)
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if (!strcmp(methods[i].name, desc->name)) {
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desc->offset = methods[i].offset;
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return;
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}
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if (methods_count == methods_size) {
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struct method* p;
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methods_size += 10;
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p = (struct method*) malloc(methods_size * sizeof(struct method),
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M_DEVBUF, M_NOWAIT);
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if (!p)
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panic("register_method: out of memory");
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if (methods) {
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bcopy(methods, p, methods_count * sizeof(struct method));
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free(methods, M_DEVBUF);
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}
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methods = p;
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}
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m = &methods[methods_count++];
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m->name = malloc(strlen(desc->name) + 1, M_DEVBUF, M_NOWAIT);
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if (!m->name)
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panic("register_method: out of memory");
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strcpy(m->name, desc->name);
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desc->offset = m->offset = next_method_offset++;
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}
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static int error_method(void)
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{
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return ENXIO;
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}
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static struct device_ops null_ops = {
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1,
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{ error_method }
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};
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static void
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compile_methods(driver_t *driver)
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{
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device_ops_t ops;
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struct device_method *m;
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int i;
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/*
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* First register any methods which need it.
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*/
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for (i = 0, m = driver->methods; m->desc; i++, m++)
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if (!m->desc->offset)
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register_method(m->desc);
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/*
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* Then allocate the compiled op table.
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*/
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ops = malloc(sizeof(struct device_ops) + (next_method_offset-1) * sizeof(devop_t),
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M_DEVBUF, M_NOWAIT);
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if (!ops)
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panic("compile_methods: out of memory");
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ops->maxoffset = next_method_offset;
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for (i = 0; i < next_method_offset; i++)
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ops->methods[i] = error_method;
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for (i = 0, m = driver->methods; m->desc; i++, m++)
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ops->methods[m->desc->offset] = m->func;
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driver->ops = ops;
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}
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/*
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* Devclass implementation
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*/
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static devclass_list_t devclasses;
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static void
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devclass_init(void)
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{
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TAILQ_INIT(&devclasses);
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}
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static devclass_t
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devclass_find_internal(const char *classname, int create)
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{
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devclass_t dc;
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for (dc = TAILQ_FIRST(&devclasses); dc; dc = TAILQ_NEXT(dc, link))
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if (!strcmp(dc->name, classname))
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return dc;
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if (create) {
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dc = malloc(sizeof(struct devclass) + strlen(classname) + 1,
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M_DEVBUF, M_NOWAIT);
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if (!dc)
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return NULL;
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dc->name = (char*) (dc + 1);
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strcpy(dc->name, classname);
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dc->devices = NULL;
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dc->maxunit = 0;
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dc->nextunit = 0;
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TAILQ_INIT(&dc->drivers);
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TAILQ_INSERT_TAIL(&devclasses, dc, link);
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}
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return dc;
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}
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devclass_t
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devclass_find(const char *classname)
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{
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return devclass_find_internal(classname, FALSE);
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}
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int
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devclass_add_driver(devclass_t dc, driver_t *driver)
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{
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/*
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* Compile the drivers methods.
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*/
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compile_methods(driver);
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/*
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* Make sure the devclass which the driver is implementing exists.
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*/
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devclass_find_internal(driver->name, TRUE);
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TAILQ_INSERT_TAIL(&dc->drivers, driver, link);
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return 0;
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}
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int
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devclass_delete_driver(devclass_t dc, driver_t *driver)
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{
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device_t bus;
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device_t dev;
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int i;
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int error;
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/*
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* Disassociate from any devices. We iterate through all the
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* devices attached to any bus in this class.
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*/
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for (i = 0; i < dc->maxunit; i++) {
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if (dc->devices[i]) {
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bus = dc->devices[i]->parent;
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for (dev = TAILQ_FIRST(&bus->children); dev;
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dev = TAILQ_NEXT(dev, link))
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if (dev->driver == driver) {
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if (error = DEVICE_DETACH(dev))
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return error;
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device_set_driver(dev, NULL);
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}
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}
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}
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TAILQ_REMOVE(&dc->drivers, driver, link);
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return 0;
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}
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driver_t *
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devclass_find_driver(devclass_t dc, const char *classname)
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{
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driver_t *driver;
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for (driver = TAILQ_FIRST(&dc->drivers); driver;
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driver = TAILQ_NEXT(driver, link))
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if (!strcmp(driver->name, classname))
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return driver;
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return NULL;
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}
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const char *
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devclass_get_name(devclass_t dc)
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{
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return dc->name;
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}
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device_t
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devclass_get_device(devclass_t dc, int unit)
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{
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if (unit < 0 || unit >= dc->maxunit)
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return NULL;
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return dc->devices[unit];
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}
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void *
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devclass_get_softc(devclass_t dc, int unit)
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{
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device_t dev;
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if (unit < 0 || unit >= dc->maxunit)
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return NULL;
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dev = dc->devices[unit];
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if (!dev || dev->state < DS_ATTACHED)
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return NULL;
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return dev->softc;
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}
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int
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devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp)
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{
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int i;
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int count;
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device_t dev;
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device_t *list;
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count = 0;
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for (i = 0; i < dc->maxunit; i++)
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if (dc->devices[i])
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count++;
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list = malloc(count * sizeof(device_t), M_TEMP, M_NOWAIT);
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if (!list)
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return ENOMEM;
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count = 0;
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for (i = 0; i < dc->maxunit; i++)
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if (dc->devices[i]) {
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list[count] = dc->devices[i];
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count++;
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}
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*devlistp = list;
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*devcountp = count;
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return 0;
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}
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int
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devclass_get_maxunit(devclass_t dc)
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{
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return dc->maxunit;
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}
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static int
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devclass_alloc_unit(devclass_t dc, int *unitp)
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{
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int unit = *unitp;
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/*
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* If we have been given a wired unit number, check for existing
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* device.
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*/
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if (unit != -1) {
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device_t dev;
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dev = devclass_get_device(dc, unit);
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if (dev) {
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printf("devclass_alloc_unit: %s%d already exists, using next available unit number\n", dc->name, unit);
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unit = -1;
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}
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}
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if (unit == -1) {
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unit = dc->nextunit;
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dc->nextunit++;
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} else if (dc->nextunit <= unit)
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dc->nextunit = unit + 1;
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if (unit >= dc->maxunit) {
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device_t *newlist;
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int newsize;
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newsize = (dc->maxunit ? 2 * dc->maxunit
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: MINALLOCSIZE / sizeof(device_t));
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newlist = malloc(sizeof(device_t) * newsize, M_DEVBUF, M_NOWAIT);
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if (!newlist)
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return ENOMEM;
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bcopy(dc->devices, newlist, sizeof(device_t) * dc->maxunit);
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bzero(newlist + dc->maxunit,
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sizeof(device_t) * (newsize - dc->maxunit));
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if (dc->devices)
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free(dc->devices, M_DEVBUF);
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dc->devices = newlist;
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dc->maxunit = newsize;
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}
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*unitp = unit;
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return 0;
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}
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static int
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devclass_add_device(devclass_t dc, device_t dev)
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{
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int error;
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if (error = devclass_alloc_unit(dc, &dev->unit))
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return error;
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dc->devices[dev->unit] = dev;
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dev->devclass = dc;
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return 0;
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}
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static int
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devclass_delete_device(devclass_t dc, device_t dev)
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{
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if (dev->devclass != dc
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|| dc->devices[dev->unit] != dev)
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panic("devclass_delete_device: inconsistent device class");
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dc->devices[dev->unit] = NULL;
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if (dev->flags & DF_WILDCARD)
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dev->unit = -1;
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dev->devclass = NULL;
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while (dc->nextunit > 0 && dc->devices[dc->nextunit - 1] == NULL)
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dc->nextunit--;
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return 0;
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}
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static device_t
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make_device(device_t parent, const char *name,
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int unit, void *ivars)
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{
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driver_t *driver;
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device_t dev;
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devclass_t dc;
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int error;
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if (name) {
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dc = devclass_find_internal(name, TRUE);
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if (!dc) {
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printf("make_device: can't find device class %s\n", name);
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return NULL;
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}
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if (error = devclass_alloc_unit(dc, &unit))
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return NULL;
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} else
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dc = NULL;
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dev = malloc(sizeof(struct device), M_DEVBUF, M_NOWAIT);
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if (!dev)
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return 0;
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dev->parent = parent;
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TAILQ_INIT(&dev->children);
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dev->ops = &null_ops;
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dev->driver = NULL;
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dev->devclass = dc;
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dev->unit = unit;
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dev->desc = NULL;
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dev->busy = 0;
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dev->flags = DF_ENABLED;
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if (unit == -1)
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dev->flags |= DF_WILDCARD;
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if (name)
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dev->flags |= DF_FIXEDCLASS;
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dev->ivars = ivars;
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dev->softc = NULL;
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if (dc)
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dc->devices[unit] = dev;
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dev->state = DS_NOTPRESENT;
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return dev;
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}
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static void
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device_print_child(device_t dev, device_t child)
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{
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printf("%s%d", device_get_name(child), device_get_unit(child));
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if (device_is_alive(child)) {
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if (device_get_desc(child))
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printf(": <%s>", device_get_desc(child));
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BUS_PRINT_CHILD(dev, child);
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} else
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printf(" not found");
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printf("\n");
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}
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device_t
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device_add_child(device_t dev, const char *name, int unit, void *ivars)
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{
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device_t child;
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child = make_device(dev, name, unit, ivars);
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TAILQ_INSERT_TAIL(&dev->children, child, link);
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return child;
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}
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device_t
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device_add_child_after(device_t dev, device_t place, const char *name,
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int unit, void *ivars)
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{
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device_t child;
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child = make_device(dev, name, unit, ivars);
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if (place) {
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TAILQ_INSERT_AFTER(&dev->children, place, dev, link);
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} else {
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TAILQ_INSERT_HEAD(&dev->children, dev, link);
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}
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return child;
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}
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int
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device_delete_child(device_t dev, device_t child)
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{
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int error;
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if (error = DEVICE_DETACH(child))
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return error;
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if (child->devclass)
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devclass_delete_device(child->devclass, child);
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TAILQ_REMOVE(&dev->children, child, link);
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free(dev, M_DEVBUF);
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return 0;
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}
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/*
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* Find only devices attached to this bus.
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*/
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device_t
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device_find_child(device_t dev, const char *classname, int unit)
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{
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devclass_t dc;
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device_t child;
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dc = devclass_find(classname);
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if (!dc)
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return NULL;
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child = devclass_get_device(dc, unit);
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if (child && child->parent == dev)
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return child;
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return NULL;
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}
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static driver_t *
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first_matching_driver(devclass_t dc, device_t dev)
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{
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if (dev->devclass)
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return devclass_find_driver(dc, dev->devclass->name);
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else
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return TAILQ_FIRST(&dc->drivers);
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}
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static driver_t *
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next_matching_driver(devclass_t dc, device_t dev, driver_t *last)
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{
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if (dev->devclass) {
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driver_t *driver;
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for (driver = TAILQ_NEXT(last, link); driver;
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driver = TAILQ_NEXT(driver, link))
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if (!strcmp(dev->devclass->name, driver->name))
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return driver;
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return NULL;
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} else
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return TAILQ_NEXT(last, link);
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}
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|
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static int
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device_probe_child(device_t dev, device_t child)
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{
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devclass_t dc;
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driver_t *driver;
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void *softc;
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dc = dev->devclass;
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if (dc == NULL)
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panic("device_probe_child: parent device has no devclass");
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if (child->state == DS_ALIVE)
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return 0;
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for (driver = first_matching_driver(dc, child);
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driver;
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driver = next_matching_driver(dc, child, driver)) {
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device_set_driver(child, driver);
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if (DEVICE_PROBE(child) == 0) {
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if (!child->devclass)
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device_set_devclass(child, driver->name);
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child->state = DS_ALIVE;
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return 0;
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}
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}
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|
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return ENXIO;
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}
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|
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device_t
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device_get_parent(device_t dev)
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{
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return dev->parent;
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}
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|
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driver_t *
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device_get_driver(device_t dev)
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{
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return dev->driver;
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}
|
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|
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devclass_t
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device_get_devclass(device_t dev)
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{
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return dev->devclass;
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}
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|
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const char *
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device_get_name(device_t dev)
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{
|
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if (dev->devclass)
|
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return devclass_get_name(dev->devclass);
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return NULL;
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}
|
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|
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int
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device_get_unit(device_t dev)
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{
|
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return dev->unit;
|
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}
|
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|
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const char *
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device_get_desc(device_t dev)
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{
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return dev->desc;
|
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}
|
|
|
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void
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device_set_desc(device_t dev, const char* desc)
|
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{
|
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dev->desc = desc;
|
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}
|
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|
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void *
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device_get_softc(device_t dev)
|
|
{
|
|
return dev->softc;
|
|
}
|
|
|
|
void *
|
|
device_get_ivars(device_t dev)
|
|
{
|
|
return dev->ivars;
|
|
}
|
|
|
|
device_state_t
|
|
device_get_state(device_t dev)
|
|
{
|
|
return dev->state;
|
|
}
|
|
|
|
void
|
|
device_enable(device_t dev)
|
|
{
|
|
dev->flags |= DF_ENABLED;
|
|
}
|
|
|
|
void
|
|
device_disable(device_t dev)
|
|
{
|
|
dev->flags &= ~DF_ENABLED;
|
|
}
|
|
|
|
void
|
|
device_busy(device_t dev)
|
|
{
|
|
if (dev->state < DS_ATTACHED)
|
|
panic("device_busy: called for unattached device");
|
|
if (dev->busy == 0 && dev->parent)
|
|
device_busy(dev->parent);
|
|
dev->busy++;
|
|
dev->state = DS_BUSY;
|
|
}
|
|
|
|
void
|
|
device_unbusy(device_t dev)
|
|
{
|
|
if (dev->state != DS_BUSY)
|
|
panic("device_unbusy: called for non-busy device");
|
|
dev->busy--;
|
|
if (dev->busy == 0) {
|
|
if (dev->parent)
|
|
device_unbusy(dev->parent);
|
|
dev->state = DS_ATTACHED;
|
|
}
|
|
}
|
|
|
|
int
|
|
device_is_enabled(device_t dev)
|
|
{
|
|
return (dev->flags & DF_ENABLED) != 0;
|
|
}
|
|
|
|
int
|
|
device_is_alive(device_t dev)
|
|
{
|
|
return dev->state >= DS_ALIVE;
|
|
}
|
|
|
|
int
|
|
device_set_devclass(device_t dev, const char *classname)
|
|
{
|
|
devclass_t dc;
|
|
|
|
if (dev->devclass) {
|
|
printf("device_set_devclass: device class already set\n");
|
|
return EINVAL;
|
|
}
|
|
|
|
dc = devclass_find_internal(classname, TRUE);
|
|
if (!dc)
|
|
return ENOMEM;
|
|
|
|
return devclass_add_device(dc, dev);
|
|
}
|
|
|
|
int
|
|
device_set_driver(device_t dev, driver_t *driver)
|
|
{
|
|
if (dev->state >= DS_ATTACHED)
|
|
return EBUSY;
|
|
|
|
if (dev->driver == driver)
|
|
return 0;
|
|
|
|
if (dev->softc) {
|
|
free(dev->softc, M_DEVBUF);
|
|
dev->softc = NULL;
|
|
}
|
|
dev->ops = &null_ops;
|
|
dev->driver = driver;
|
|
if (driver) {
|
|
dev->ops = driver->ops;
|
|
dev->softc = malloc(driver->softc, M_DEVBUF, M_NOWAIT);
|
|
bzero(dev->softc, driver->softc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
device_probe_and_attach(device_t dev)
|
|
{
|
|
device_t bus = dev->parent;
|
|
int error;
|
|
|
|
if (dev->state >= DS_ALIVE)
|
|
return 0;
|
|
|
|
if (dev->flags & DF_ENABLED) {
|
|
device_probe_child(bus, dev);
|
|
device_print_child(bus, dev);
|
|
if (dev->state == DS_ALIVE) {
|
|
error = DEVICE_ATTACH(dev);
|
|
if (!error)
|
|
dev->state = DS_ATTACHED;
|
|
else {
|
|
printf("device_probe_and_attach: %s%d attach returned %d\n",
|
|
dev->driver->name, dev->unit, error);
|
|
device_set_driver(dev, NULL);
|
|
dev->state = DS_NOTPRESENT;
|
|
}
|
|
}
|
|
} else
|
|
printf("%s%d: disabled, not probed.\n",
|
|
dev->devclass->name, dev->unit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
device_detach(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
if (dev->state == DS_BUSY)
|
|
return EBUSY;
|
|
if (dev->state != DS_ATTACHED)
|
|
return 0;
|
|
|
|
if (error = DEVICE_DETACH(dev))
|
|
return error;
|
|
|
|
if (!(dev->flags & DF_FIXEDCLASS))
|
|
devclass_delete_device(dev->devclass, dev);
|
|
|
|
dev->state = DS_NOTPRESENT;
|
|
device_set_driver(dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
device_shutdown(device_t dev)
|
|
{
|
|
if (dev->state < DS_ATTACHED)
|
|
return 0;
|
|
return DEVICE_SHUTDOWN(dev);
|
|
}
|
|
|
|
/*
|
|
* Access functions for device resources.
|
|
*/
|
|
extern struct config_device devtab[];
|
|
extern int devtab_count;
|
|
|
|
static int
|
|
resource_match_string(int i, char *resname, char *value)
|
|
{
|
|
int j;
|
|
struct resource *res;
|
|
|
|
for (j = 0, res = devtab[i].resources;
|
|
j < devtab[i].resource_count; j++, res++)
|
|
if (!strcmp(res->name, resname)
|
|
&& res->type == RES_STRING
|
|
&& !strcmp(res->u.stringval, value))
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
static int
|
|
resource_find(const char *name, int unit, char *resname, struct resource **result)
|
|
{
|
|
int i, j;
|
|
struct resource *res;
|
|
|
|
/*
|
|
* First check specific instances, then generic.
|
|
*/
|
|
for (i = 0; i < devtab_count; i++) {
|
|
if (devtab[i].unit < 0)
|
|
continue;
|
|
if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
|
|
res = devtab[i].resources;
|
|
for (j = 0; j < devtab[i].resource_count; j++, res++)
|
|
if (!strcmp(res->name, resname)) {
|
|
*result = res;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
for (i = 0; i < devtab_count; i++) {
|
|
if (devtab[i].unit >= 0)
|
|
continue;
|
|
if (!strcmp(devtab[i].name, name) && devtab[i].unit == unit) {
|
|
res = devtab[i].resources;
|
|
for (j = 0; j < devtab[i].resource_count; j++, res++)
|
|
if (!strcmp(res->name, resname)) {
|
|
*result = res;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
return ENOENT;
|
|
}
|
|
|
|
int
|
|
resource_int_value(const char *name, int unit, char *resname, int *result)
|
|
{
|
|
int error;
|
|
struct resource *res;
|
|
if ((error = resource_find(name, unit, resname, &res)) != 0)
|
|
return error;
|
|
if (res->type != RES_INT)
|
|
return EFTYPE;
|
|
*result = res->u.intval;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
resource_long_value(const char *name, int unit, char *resname, long *result)
|
|
{
|
|
int error;
|
|
struct resource *res;
|
|
if ((error = resource_find(name, unit, resname, &res)) != 0)
|
|
return error;
|
|
if (res->type != RES_LONG)
|
|
return EFTYPE;
|
|
*result = res->u.longval;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
resource_string_value(const char *name, int unit, char *resname, char **result)
|
|
{
|
|
int error;
|
|
struct resource *res;
|
|
if ((error = resource_find(name, unit, resname, &res)) != 0)
|
|
return error;
|
|
if (res->type != RES_STRING)
|
|
return EFTYPE;
|
|
*result = res->u.stringval;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
resource_query_string(int i, char *resname, char *value)
|
|
{
|
|
if (i < 0)
|
|
i = 0;
|
|
else
|
|
i = i + 1;
|
|
for (; i < devtab_count; i++)
|
|
if (resource_match_string(i, resname, value))
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
char *
|
|
resource_query_name(int i)
|
|
{
|
|
return devtab[i].name;
|
|
}
|
|
|
|
int
|
|
resource_query_unit(int i)
|
|
{
|
|
return devtab[i].unit;
|
|
}
|
|
|
|
|
|
/*
|
|
* Some useful method implementations to make life easier for bus drivers.
|
|
*/
|
|
int
|
|
bus_generic_attach(device_t dev)
|
|
{
|
|
device_t child;
|
|
int error;
|
|
|
|
for (child = TAILQ_FIRST(&dev->children);
|
|
child; child = TAILQ_NEXT(child, link))
|
|
device_probe_and_attach(child);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
bus_generic_detach(device_t dev)
|
|
{
|
|
device_t child;
|
|
int error;
|
|
|
|
if (dev->state != DS_ATTACHED)
|
|
return EBUSY;
|
|
|
|
for (child = TAILQ_FIRST(&dev->children);
|
|
child; child = TAILQ_NEXT(child, link))
|
|
DEVICE_DETACH(child);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
bus_generic_shutdown(device_t dev)
|
|
{
|
|
device_t child;
|
|
|
|
for (child = TAILQ_FIRST(&dev->children);
|
|
child; child = TAILQ_NEXT(child, link))
|
|
DEVICE_SHUTDOWN(child);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
bus_generic_print_child(device_t dev, device_t child)
|
|
{
|
|
}
|
|
|
|
int
|
|
bus_generic_read_ivar(device_t dev, device_t child, int index, u_long* result)
|
|
{
|
|
return ENOENT;
|
|
}
|
|
|
|
int
|
|
bus_generic_write_ivar(device_t dev, device_t child, int index, u_long value)
|
|
{
|
|
return ENOENT;
|
|
}
|
|
|
|
void *
|
|
bus_generic_create_intr(device_t dev, device_t child, int irq, driver_intr_t *intr, void *arg)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return BUS_CREATE_INTR(dev->parent, dev, irq, intr, arg);
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
bus_generic_connect_intr(device_t dev, void *ih)
|
|
{
|
|
/* Propagate up the bus hierarchy until someone handles it. */
|
|
if (dev->parent)
|
|
return BUS_CONNECT_INTR(dev->parent, ih);
|
|
else
|
|
return EINVAL;
|
|
}
|
|
|
|
static int root_create_intr(device_t dev, device_t child,
|
|
driver_intr_t *intr, void *arg)
|
|
{
|
|
/*
|
|
* If an interrupt mapping gets to here something bad has happened.
|
|
* Should probably panic.
|
|
*/
|
|
return EINVAL;
|
|
}
|
|
|
|
static device_method_t root_methods[] = {
|
|
/* Bus interface */
|
|
DEVMETHOD(bus_print_child, bus_generic_print_child),
|
|
DEVMETHOD(bus_read_ivar, bus_generic_read_ivar),
|
|
DEVMETHOD(bus_write_ivar, bus_generic_write_ivar),
|
|
DEVMETHOD(bus_create_intr, root_create_intr),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t root_driver = {
|
|
"root",
|
|
root_methods,
|
|
DRIVER_TYPE_MISC,
|
|
1, /* no softc */
|
|
};
|
|
|
|
device_t root_bus;
|
|
devclass_t root_devclass;
|
|
|
|
static int
|
|
root_bus_module_handler(module_t mod, modeventtype_t what, void* arg)
|
|
{
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
devclass_init();
|
|
compile_methods(&root_driver);
|
|
root_bus = make_device(NULL, "root", 0, NULL);
|
|
root_bus->ops = root_driver.ops;
|
|
root_bus->driver = &root_driver;
|
|
root_bus->state = DS_ATTACHED;
|
|
root_devclass = devclass_find("root");
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static moduledata_t root_bus_mod = {
|
|
"rootbus",
|
|
root_bus_module_handler,
|
|
0
|
|
};
|
|
DECLARE_MODULE(rootbus, root_bus_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
|
|
|
|
void
|
|
root_bus_configure()
|
|
{
|
|
device_t dev;
|
|
int error;
|
|
|
|
for (dev = TAILQ_FIRST(&root_bus->children); dev;
|
|
dev = TAILQ_NEXT(dev, link)) {
|
|
device_probe_and_attach(dev);
|
|
}
|
|
}
|
|
|
|
int
|
|
driver_module_handler(module_t mod, modeventtype_t what, void* arg)
|
|
{
|
|
struct driver_module_data* data = (struct driver_module_data*) arg;
|
|
devclass_t bus_devclass = devclass_find_internal(data->busname, TRUE);
|
|
int error;
|
|
|
|
switch (what) {
|
|
case MOD_LOAD:
|
|
if (error = devclass_add_driver(bus_devclass,
|
|
data->driver))
|
|
return error;
|
|
*data->devclass =
|
|
devclass_find_internal(data->driver->name, TRUE);
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
if (error = devclass_delete_driver(bus_devclass,
|
|
data->driver))
|
|
return error;
|
|
break;
|
|
}
|
|
|
|
if (data->chainevh)
|
|
return data->chainevh(mod, what, data->chainarg);
|
|
else
|
|
return 0;
|
|
}
|