Add a solaris compatible ofw interface for third party software that
expects one to use. Only the functions used by XFree86 are actually implemented. Glanced at by: tmm
This commit is contained in:
Jake Burkholder
parent
2db4b023bb
commit
1de46e12a3
218
sys/dev/ofw/openpromio.c
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218
sys/dev/ofw/openpromio.c
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/*-
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* Copyright (c) 2003 Jake Burkholder.
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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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/errno.h>
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#include <sys/fcntl.h>
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#include <sys/ioccom.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/openpromio.h>
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/*
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* This provides a solaris compatible character device interface to
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* openfirmware. It exists entirely for compatibility with software
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* like X11, and only the features that are actually needed for that
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* are implemented. The interface sucks too much to actually use,
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* new code should use the /dev/openfirm device.
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*/
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static d_open_t openprom_open;
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static d_close_t openprom_close;
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static d_ioctl_t openprom_ioctl;
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static int openprom_modevent(module_t mode, int type, void *data);
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static int openprom_node_valid(phandle_t node);
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static int openprom_node_search(phandle_t root, phandle_t node);
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static struct cdevsw openprom_cdevsw = {
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.d_open = openprom_open,
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.d_close = openprom_close,
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.d_ioctl = openprom_ioctl,
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.d_name = "openprom",
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};
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static int openprom_is_open;
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static dev_t openprom_dev;
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static phandle_t openprom_node;
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static int
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openprom_open(dev_t dev, int oflags, int devtype, struct thread *td)
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{
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if (openprom_is_open != 0)
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return (EBUSY);
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openprom_is_open = 1;
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return (0);
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}
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static int
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openprom_close(dev_t dev, int fflag, int devtype, struct thread *td)
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{
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openprom_is_open = 0;
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return (0);
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}
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static int
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openprom_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
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struct thread *td)
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{
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struct openpromio *oprom;
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phandle_t node;
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uint32_t len;
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size_t done;
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int proplen;
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char *prop;
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char *buf;
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int error;
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error = 0;
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oprom = *(void **)data;
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switch (cmd) {
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case OPROMCHILD:
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case OPROMNEXT:
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error = copyin(&oprom->oprom_size, &len, sizeof(len));
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if (error != 0)
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break;
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if (len != sizeof(node)) {
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error = EINVAL;
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break;
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}
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error = copyin(&oprom->oprom_array, &node, sizeof(node));
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if (error != 0)
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break;
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error = openprom_node_valid(node);
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if (error != 0)
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break;
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switch (cmd) {
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case OPROMCHILD:
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node = OF_child(node);
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break;
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case OPROMNEXT:
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node = OF_peer(node);
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break;
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}
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error = copyout(&node, &oprom->oprom_array, sizeof(node));
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if (error != 0)
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break;
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openprom_node = node;
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break;
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case OPROMGETPROP:
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case OPROMNXTPROP:
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error = copyin(&oprom->oprom_size, &len, sizeof(len));
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if (error != 0)
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break;
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if (len > OPROMMAXPARAM) {
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error = EINVAL;
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break;
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}
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prop = malloc(len, M_TEMP, M_WAITOK | M_ZERO);
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error = copyinstr(&oprom->oprom_array, prop, len, &done);
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if (error != 0)
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break;
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buf = malloc(OPROMMAXPARAM, M_TEMP, M_WAITOK | M_ZERO);
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node = openprom_node;
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switch (cmd) {
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case OPROMGETPROP:
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proplen = OF_getproplen(node, prop);
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if (proplen > OPROMMAXPARAM) {
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error = EINVAL;
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break;
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}
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error = OF_getprop(node, prop, buf, proplen);
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break;
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case OPROMNXTPROP:
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error = OF_nextprop(node, prop, buf);
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proplen = strlen(buf);
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break;
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}
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if (error != -1) {
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error = copyout(&proplen, &oprom->oprom_size,
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sizeof(proplen));
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if (error == 0)
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error = copyout(buf, &oprom->oprom_array,
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proplen + 1);
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} else
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error = EINVAL;
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free(prop, M_TEMP);
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free(buf, M_TEMP);
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break;
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default:
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error = ENOIOCTL;
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break;
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}
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return (error);
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}
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static int
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openprom_node_valid(phandle_t node)
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{
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if (node == 0)
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return (0);
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return (openprom_node_search(OF_peer(0), node));
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}
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static int
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openprom_node_search(phandle_t root, phandle_t node)
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{
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phandle_t child;
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if (root == node)
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return (0);
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for (child = OF_child(root); child != 0 && child != -1;
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child = OF_peer(child))
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if (openprom_node_search(child, node) == 0)
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return (0);
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return (EINVAL);
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}
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static int
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openprom_modevent(module_t mode, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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openprom_dev = make_dev(&openprom_cdevsw, 0, UID_ROOT,
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GID_WHEEL, 0600, "openprom");
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return (0);
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case MOD_UNLOAD:
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destroy_dev(openprom_dev);
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return (0);
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default:
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return (0);
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}
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}
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DEV_MODULE(openprom, openprom_modevent, NULL);
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46
sys/dev/ofw/openpromio.h
Normal file
46
sys/dev/ofw/openpromio.h
Normal file
@ -0,0 +1,46 @@
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/*-
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* Copyright (c) 2003 Jake Burkholder.
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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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* $FreeBSD$
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*/
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#ifndef _DEV_OFW_OPENPROMIO_H_
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#define _DEV_OFW_OPENPROMIO_H_
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#include <sys/ioccom.h>
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struct openpromio {
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uint32_t oprom_size;
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char oprom_array[];
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};
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#define OPROMNEXT _IO('O', 1)
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#define OPROMCHILD _IO('O', 2)
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#define OPROMGETPROP _IO('O', 3)
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#define OPROMNXTPROP _IO('O', 4)
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#define OPROMMAXPARAM 4096
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#endif
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