File: [local] / sys / miscfs / specfs / spec_subr.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:15:20 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
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/* $OpenBSD: spec_subr.c,v 1.2 2006/06/02 20:49:08 pedro Exp $ */
/*
* Copyright (c) 2006 Pedro Martelletto <pedro@openbsd.org>
* Copyright (c) 2006 Thordur Bjornsson <thib@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <miscfs/specfs/specdev.h>
int
spec_open_clone(struct vop_open_args *ap)
{
struct vnode *cvp, *vp = ap->a_vp;
struct cloneinfo *cip;
int error, i;
for (i = 1; i < sizeof(vp->v_specbitmap) * NBBY; i++)
if (isclr(vp->v_specbitmap, i)) {
setbit(vp->v_specbitmap, i);
break;
}
if (i == sizeof(vp->v_specbitmap) * NBBY)
return (EBUSY); /* too many open instances */
printf("spec_open_clone(): cloning device (%d, %d) for pid %u\n",
major(vp->v_rdev), minor(vp->v_rdev), curproc->p_pid);
error = cdevvp(makedev(major(vp->v_rdev), i), &cvp);
if (error)
return (error); /* out of vnodes */
VOP_UNLOCK(vp, 0, ap->a_p);
error = cdevsw[major(vp->v_rdev)].d_open(cvp->v_rdev, ap->a_mode,
S_IFCHR, ap->a_p);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, ap->a_p);
if (error) {
clrbit(vp->v_specbitmap, i);
return (error); /* device open failed */
}
cip = malloc(sizeof(struct cloneinfo), M_TEMP, M_WAITOK);
cip->ci_data = vp->v_data;
cip->ci_vp = cvp;
cvp->v_specparent = vp;
vp->v_flag |= VCLONED;
vp->v_data = cip;
printf("spec_open_clone(): new minor for cloned device is %d\n",
minor(cvp->v_rdev));
return (0); /* device cloned */
}
int
spec_close_clone(struct vop_close_args *ap)
{
struct vnode *pvp, *vp = ap->a_vp;
int error;
error = cdevsw[major(vp->v_rdev)].d_close(vp->v_rdev, ap->a_fflag,
S_IFCHR, ap->a_p);
if (error)
return (error); /* device close failed */
pvp = vp->v_specparent; /* get parent device */
clrbit(pvp->v_specbitmap, minor(vp->v_rdev));
printf("spec_close_clone(): freeing minor %d of dev %d for"
" pid %u\n", minor(vp->v_rdev), major(vp->v_rdev), curproc->p_pid);
return (0); /* clone closed */
}