File: [local] / sys / dev / isa / fdc.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:11:19 2008 UTC (16 years, 3 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: fdc.c,v 1.17 2005/09/19 01:28:04 deraadt Exp $ */
/* $NetBSD: fd.c,v 1.90 1996/05/12 23:12:03 mycroft Exp $ */
/*-
* Copyright (c) 1993, 1994, 1995 Charles Hannum.
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* Portions Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)fd.c 7.4 (Berkeley) 5/25/91
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/dkstat.h>
#include <sys/disk.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/uio.h>
#include <sys/mtio.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/timeout.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <machine/conf.h>
#include <machine/intr.h>
#include <machine/ioctl_fd.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/isa/fdreg.h>
#if defined(__i386__) || defined(__amd64__) /* XXX */
#include <dev/ic/mc146818reg.h> /* for NVRAM access */
#include <i386/isa/nvram.h>
#endif
#include <dev/isa/fdlink.h>
#include "fd.h"
/* controller driver configuration */
int fdcprobe(struct device *, void *, void *);
void fdcattach(struct device *, struct device *, void *);
struct cfattach fdc_ca = {
sizeof(struct fdc_softc), fdcprobe, fdcattach
};
struct cfdriver fdc_cd = {
NULL, "fdc", DV_DULL
};
int fddprint(void *, const char *);
int fdcintr(void *);
int
fdcprobe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
register struct isa_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_space_handle_t ioh_ctl;
int rv;
iot = ia->ia_iot;
rv = 0;
/* Map the i/o space. */
if (bus_space_map(iot, ia->ia_iobase, FDC_NPORT, 0, &ioh))
return 0;
if (bus_space_map(iot, ia->ia_iobase + FDCTL_OFFSET,
FDCTL_NPORT, 0, &ioh_ctl))
return 0;
/* reset */
bus_space_write_1(iot, ioh, fdout, 0);
delay(100);
bus_space_write_1(iot, ioh, fdout, FDO_FRST);
/* see if it can handle a command */
if (out_fdc(iot, ioh, NE7CMD_SPECIFY) < 0)
goto out;
out_fdc(iot, ioh, 0xdf);
out_fdc(iot, ioh, 2);
rv = 1;
ia->ia_iosize = FDC_NPORT;
ia->ia_msize = 0;
out:
bus_space_unmap(iot, ioh, FDC_NPORT);
bus_space_unmap(iot, ioh_ctl, FDCTL_NPORT);
return rv;
}
void
fdcattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fdc_softc *fdc = (void *)self;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_space_handle_t ioh_ctl;
struct isa_attach_args *ia = aux;
struct fdc_attach_args fa;
int type;
iot = ia->ia_iot;
/* Re-map the I/O space. */
if (bus_space_map(iot, ia->ia_iobase, FDC_NPORT, 0, &ioh) ||
bus_space_map(iot, ia->ia_iobase + FDCTL_OFFSET,
FDCTL_NPORT, 0, &ioh_ctl))
panic("fdcattach: couldn't map I/O ports");
fdc->sc_iot = iot;
fdc->sc_ioh = ioh;
fdc->sc_ioh_ctl = ioh_ctl;
fdc->sc_drq = ia->ia_drq;
fdc->sc_state = DEVIDLE;
TAILQ_INIT(&fdc->sc_link.fdlink.sc_drives); /* XXX */
printf("\n");
fdc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
IPL_BIO, fdcintr, fdc, fdc->sc_dev.dv_xname);
#if defined(__i386__) || defined(__amd64__)
/*
* The NVRAM info only tells us about the first two disks on the
* `primary' floppy controller.
*/
if (fdc->sc_dev.dv_unit == 0)
type = mc146818_read(NULL, NVRAM_DISKETTE); /* XXX softc */
else
#endif
type = -1;
timeout_set(&fdc->fdcpseudointr_to, fdcpseudointr, fdc);
/* physical limit: four drives per controller. */
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
fa.fa_flags = 0;
fa.fa_type = 0;
#if NFD > 0
if (type >= 0 && fa.fa_drive < 2)
fa.fa_deftype = fd_nvtotype(fdc->sc_dev.dv_xname,
type, fa.fa_drive);
else
#endif
fa.fa_deftype = NULL; /* unknown */
(void)config_found(self, (void *)&fa, fddprint);
}
}
/*
* Print the location of a disk/tape drive (called just before attaching the
* the drive). If `fdc' is not NULL, the drive was found but was not
* in the system config file; print the drive name as well.
* Return QUIET (config_find ignores this if the device was configured) to
* avoid printing `fdN not configured' messages.
*/
int
fddprint(aux, fdc)
void *aux;
const char *fdc;
{
register struct fdc_attach_args *fa = aux;
if (!fdc)
printf(" drive %d", fa->fa_drive);
return QUIET;
}
int
fdcresult(fdc)
struct fdc_softc *fdc;
{
bus_space_tag_t iot = fdc->sc_iot;
bus_space_handle_t ioh = fdc->sc_ioh;
u_char i;
int j = 100000, n = 0;
for (; j; j--) {
i = bus_space_read_1(iot, ioh, fdsts) &
(NE7_DIO | NE7_RQM | NE7_CB);
if (i == NE7_RQM)
return n;
if (i == (NE7_DIO | NE7_RQM | NE7_CB)) {
if (n >= sizeof(fdc->sc_status)) {
log(LOG_ERR, "fdcresult: overrun\n");
return -1;
}
fdc->sc_status[n++] =
bus_space_read_1(iot, ioh, fddata);
}
delay(10);
}
return -1;
}
int
out_fdc(iot, ioh, x)
bus_space_tag_t iot;
bus_space_handle_t ioh;
u_char x;
{
int i = 100000;
while ((bus_space_read_1(iot, ioh, fdsts) & NE7_DIO) && i-- > 0);
if (i <= 0)
return -1;
while ((bus_space_read_1(iot, ioh, fdsts) & NE7_RQM) == 0 && i-- > 0);
if (i <= 0)
return -1;
bus_space_write_1(iot, ioh, fddata, x);
return 0;
}
void
fdcstart(fdc)
struct fdc_softc *fdc;
{
#ifdef DIAGNOSTIC
/* only got here if controller's drive queue was inactive; should
be in idle state */
if (fdc->sc_state != DEVIDLE) {
printf("fdcstart: not idle\n");
return;
}
#endif
(void) fdcintr(fdc);
}
void
fdcstatus(dv, n, s)
struct device *dv;
int n;
char *s;
{
struct fdc_softc *fdc = (void *)dv->dv_parent;
if (n == 0) {
out_fdc(fdc->sc_iot, fdc->sc_ioh, NE7CMD_SENSEI);
(void) fdcresult(fdc);
n = 2;
}
printf("%s: %s", dv->dv_xname, s);
switch (n) {
case 0:
printf("\n");
break;
case 2:
printf(" (st0 %b cyl %d)\n",
fdc->sc_status[0], NE7_ST0BITS,
fdc->sc_status[1]);
break;
case 7:
printf(" (st0 %b st1 %b st2 %b cyl %d head %d sec %d)\n",
fdc->sc_status[0], NE7_ST0BITS,
fdc->sc_status[1], NE7_ST1BITS,
fdc->sc_status[2], NE7_ST2BITS,
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
break;
#ifdef DIAGNOSTIC
default:
printf("\nfdcstatus: weird size");
break;
#endif
}
}
void
fdcpseudointr(arg)
void *arg;
{
int s;
/* Just ensure it has the right spl. */
s = splbio();
(void) fdcintr(arg);
splx(s);
}
int
fdcintr(arg)
void *arg;
{
#if NFD > 0
struct fdc_softc *fdc = arg;
extern int fdintr(struct fdc_softc *);
/* Will switch on device type, shortly. */
return (fdintr(fdc));
#else
printf("fdcintr: got interrupt, but no devices!\n");
return (1);
#endif
}