/* $NetBSD: fd.c,v 1.87 2022/05/20 19:34:22 andvar Exp $ */
/*-
* 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.
*
* 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
*/
/*-
* Copyright (c) 1993, 1994, 1995 Charles M. Hannum.
*
* This code is derived from software contributed to Berkeley by
* Don Ahn.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fd.c,v 1.87 2022/05/20 19:34:22 andvar Exp $");
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/fdio.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/kmem.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/conf.h>
#include <dev/cons.h>
#include <uvm/uvm_extern.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <sun3/dev/fdreg.h>
#include <sun3/dev/fdvar.h>
#include "ioconf.h"
/*
* Print a complaint when no fd children were specified
* in the config file. Better than a link error...
*
* XXX: Some folks say this driver should be split in two,
* but that seems pointless with ONLY one type of child.
* (Thankfully, no 3/80 boxes have floppy tapes!:)
*/
#include "fdc.h"
#if NFD == 0
#error "fdc but no fd?"
#endif
#define FDUNIT(dev) (minor(dev) / 8)
#define FDTYPE(dev) (minor(dev) % 8)
/* (mis)use device use flag to identify format operation */
#define B_FORMAT B_DEVPRIVATE
#ifdef FD_DEBUG
int fdc_debug = 0;
#endif
enum fdc_state {
DEVIDLE = 0,
MOTORWAIT,
DOSEEK,
SEEKWAIT,
SEEKTIMEDOUT,
SEEKCOMPLETE,
DOIO,
IOCOMPLETE,
IOTIMEDOUT,
DORESET,
RESETCOMPLETE,
RESETTIMEDOUT,
DORECAL,
RECALWAIT,
RECALTIMEDOUT,
RECALCOMPLETE,
};
/* software state, per controller */
struct fdc_softc {
device_t sc_dev; /* boilerplate */
void * sc_reg;
struct callout sc_timo_ch; /* timeout callout */
struct callout sc_intr_ch; /* pseudo-intr callout */
struct fd_softc *sc_fd[4]; /* pointers to children */
TAILQ_HEAD(drivehead, fd_softc) sc_drives;
enum fdc_state sc_state;
int sc_flags;
#define FDC_82077 0x01
#define FDC_NEEDHEADSETTLE 0x02
#define FDC_EIS 0x04
int sc_errors; /* number of retries so far */
int sc_overruns; /* number of DMA overruns */
int sc_cfg; /* current configuration */
int sc_fcr; /* current image of floppy ctrlr reg. */
struct fdcio sc_io;
#define sc_reg_msr sc_io.fdcio_reg_msr
#define sc_reg_fifo sc_io.fdcio_reg_fifo
#define sc_reg_fcr sc_io.fdcio_reg_fcr
#define sc_reg_fvr sc_io.fdcio_reg_fvr
#define sc_reg_drs sc_io.fdcio_reg_msr
#define sc_istate sc_io.fdcio_istate
#define sc_data sc_io.fdcio_data
#define sc_tc sc_io.fdcio_tc
#define sc_nstat sc_io.fdcio_nstat
#define sc_status sc_io.fdcio_status
#define sc_intrcnt sc_io.fdcio_intrcnt
void *sc_si; /* softintr cookie */
};
/* controller driver configuration */
static int fdcmatch(device_t, cfdata_t, void *);
static void fdcattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(fdc, sizeof(struct fdc_softc),
fdcmatch, fdcattach, NULL, NULL);
static struct fd_type *fd_dev_to_type(struct fd_softc *, dev_t);
/*
* Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
* we tell them apart.
*/
struct fd_type {
int sectrac; /* sectors per track */
int heads; /* number of heads */
int seccyl; /* sectors per cylinder */
int secsize; /* size code for sectors */
int datalen; /* data len when secsize = 0 */
int steprate; /* step rate and head unload time */
int gap1; /* gap len between sectors */
int gap2; /* formatting gap */
int tracks; /* total num of tracks */
int size; /* size of disk in sectors */
int step; /* steps per cylinder */
int rate; /* transfer speed code */
int fillbyte; /* format fill byte */
int interleave; /* interleave factor (formatting) */
const char *name;
};
/* The order of entries in the following table is important -- BEWARE! */
static struct fd_type fd_types[] = {
{ 18, 2, 36, 2, 0xff, 0xcf, 0x18, 0x50, 80, 2880, 1,
FDC_500KBPS, 0xf6, 1, "1.44MB" }, /* 1.44MB diskette */
{ 15, 2, 30, 2, 0xff, 0xdf, 0x1b, 0x54, 80, 2400, 1,
FDC_500KBPS, 0xf6, 1, "1.2MB" }, /* 1.2 MB AT-diskettes */
{ 9, 2, 18, 2, 0xff, 0xdf, 0x23, 0x50, 40, 720, 2,
FDC_300KBPS, 0xf6, 1, "360KB/AT" }, /* 360kB in 1.2MB drive */
{ 9, 2, 18, 2, 0xff, 0xdf, 0x2a, 0x50, 40, 720, 1,
FDC_250KBPS, 0xf6, 1, "360KB/PC" }, /* 360kB PC diskettes */
{ 9, 2, 18, 2, 0xff, 0xdf, 0x2a, 0x50, 80, 1440, 1,
FDC_250KBPS, 0xf6, 1, "720KB" }, /* 3.5" 720kB diskette */
{ 9, 2, 18, 2, 0xff, 0xdf, 0x23, 0x50, 80, 1440, 1,
FDC_300KBPS, 0xf6, 1, "720KB/x" }, /* 720kB in 1.2MB drive */
{ 9, 2, 18, 2, 0xff, 0xdf, 0x2a, 0x50, 40, 720, 2,
FDC_250KBPS,0xf6,1, "360KB/x" }, /* 360kB in 720kB drive */
};
/* software state, per disk (with up to 4 disks per ctlr) */
struct fd_softc {
device_t sc_dv; /* generic device info */
struct disk sc_dk; /* generic disk info */
struct fd_type *sc_deftype; /* default type descriptor */
struct fd_type *sc_type; /* current type descriptor */
struct callout sc_motoron_ch;
struct callout sc_motoroff_ch;
daddr_t sc_blkno; /* starting block number */
int sc_bcount; /* byte count left */
int sc_skip; /* bytes already transferred */
int sc_nblks; /* number of blocks currently transferring */
int sc_nbytes; /* number of bytes currently transferring */
int sc_drive; /* physical unit number */
int sc_flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_MOTOR 0x02 /* motor should be on */
#define FD_MOTOR_WAIT 0x04 /* motor coming up */
int sc_cylin; /* where we think the head is */
int sc_opts; /* user-set options */
TAILQ_ENTRY(fd_softc) sc_drivechain;
int sc_ops; /* I/O ops since last switch */
struct bufq_state *sc_q;/* pending I/O requests */
int sc_active; /* number of active I/O operations */
};
/* floppy driver configuration */
static int fdmatch(device_t, cfdata_t, void *);
static void fdattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(fd, sizeof(struct fd_softc),
fdmatch, fdattach, NULL, NULL);
dev_type_open(fdopen);
dev_type_close(fdclose);
dev_type_read(fdread);
dev_type_write(fdwrite);
dev_type_ioctl(fdioctl);
dev_type_strategy(fdstrategy);
const struct bdevsw fd_bdevsw = {
.d_open = fdopen,
.d_close = fdclose,
.d_strategy = fdstrategy,
.d_ioctl = fdioctl,
.d_dump = nodump,
.d_psize = nosize,
.d_discard = nodiscard,
.d_flag = D_DISK
};
const struct cdevsw fd_cdevsw = {
.d_open = fdopen,
.d_close = fdclose,
.d_read = fdread,
.d_write = fdwrite,
.d_ioctl = fdioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = D_DISK
};
static bool fd_shutdown(device_t, int);
static void fdgetdisklabel(dev_t);
static void fdstart(struct fd_softc *);
static int fdprint(void *, const char *);
struct dkdriver fddkdriver = {
.d_strategy = fdstrategy
};
static void fd_set_motor(struct fdc_softc *);
static void fd_motor_off(void *);
static void fd_motor_on(void *);
static int fdcresult(struct fdc_softc *);
static int out_fdc(struct fdc_softc *, u_char);
static void fdcstart(struct fdc_softc *);
static void fdcstatus(device_t, int, const char *);
static void fdc_reset(struct fdc_softc *);
static void fdctimeout(void *);
static void fdcpseudointr(void *);
static int fdchwintr(void *);
static void fdcswintr(void *);
static int fdcstate(struct fdc_softc *);
static void fdcretry(struct fdc_softc *);
static void fdfinish(struct fd_softc *, struct buf *);
static int fdformat(dev_t, struct ne7_fd_formb *, struct proc *);
static void fd_do_eject(struct fdc_softc *, int);
static void fd_mountroot_hook(device_t);
static void fdconf(struct fdc_softc *);
#define IPL_SOFTFD IPL_BIO
#define FDC_SOFTPRI 2
#define FD_SET_SWINTR() softint_schedule(fdc->sc_si);
/*
* The Floppy Control Register on the sun3x, not to be confused with the
* Floppy ControllER Registers that this driver mostly insterfaces with,
* controls some of the auxiliary functions of the floppy drive. These
* include asserting the floppy eject and terminal data count (or TC) pins
* of the floppy drive and controller chip respectively.
*
* Often it is necessary to toggle individual bits within this register
* while keeping the others untouched. However, the register does not
* present its latched data to the processor when read. This prevents the
* use of a read-modify-write cycle that would normally be used to modify
* individual bits. To get around this we must keep a copy of register's
* current value and always insure that when we wish to modify the register,
* we actually modify the copy and synchronize the register to it.
*/
#define FCR_REG_SYNC() (*fdc->sc_reg_fcr = fdc->sc_fcr)
int
fdcmatch(device_t parent, cfdata_t cf, void *aux)
{
struct confargs *ca = aux;
if (bus_peek(ca->ca_bustype, ca->ca_paddr, sizeof(uint8_t)) == -1)
return 0;
return 1;
}
/*
* Arguments passed between fdcattach and fdprobe.
*/
struct fdc_attach_args {
int fa_drive;
struct bootpath *fa_bootpath;
struct fd_type *fa_deftype;
};
/*
* Print the location of a disk 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
fdprint(void *aux, const char *fdc)
{
struct fdc_attach_args *fa = aux;
if (fdc == NULL)
aprint_normal(" drive %d", fa->fa_drive);
return QUIET;
}
static void
fdconf(struct fdc_softc *fdc)
{
int vroom;
if (out_fdc(fdc, NE7CMD_DUMPREG) || fdcresult(fdc) != 10)
return;
/*
* dumpreg[7] seems to be a motor-off timeout; set it to whatever
* the PROM thinks is appropriate.
*/
if ((vroom = fdc->sc_status[7]) == 0)
vroom = 0x64;
/* Configure controller to use FIFO and Implied Seek */
out_fdc(fdc, NE7CMD_CFG);
out_fdc(fdc, vroom);
out_fdc(fdc, fdc->sc_cfg);
out_fdc(fdc, 0); /* PRETRK */
/* No result phase */
}
void
fdcattach(device_t parent, device_t self, void *aux)
{
struct confargs *ca = aux;
struct fdc_softc *fdc = device_private(self);
struct fdc_attach_args fa;
int pri, vec;
char code;
fdc->sc_dev = self;
fdc->sc_reg = (void *)bus_mapin(ca->ca_bustype, ca->ca_paddr,
sizeof(union fdreg));
callout_init(&fdc->sc_timo_ch, 0);
callout_init(&fdc->sc_intr_ch, 0);
fdc->sc_state = DEVIDLE;
fdc->sc_istate = ISTATE_IDLE;
fdc->sc_flags |= FDC_EIS;
TAILQ_INIT(&fdc->sc_drives);
/* Assume a 82072 */
code = '2';
if (code == '7') {
panic("no 82077 fdc in this kernel");
/* NOTREACHED */
} else {
fdc->sc_reg_msr = &((struct fdreg_72 *)fdc->sc_reg)->fd_msr;
fdc->sc_reg_fifo = &((struct fdreg_72 *)fdc->sc_reg)->fd_fifo;
fdc->sc_reg_fcr = ((volatile uint8_t *)fdc->sc_reg)
+ FDC_FCR_OFFSET;
fdc->sc_reg_fvr = ((volatile uint8_t *)fdc->sc_reg)
+ FDC_FVR_OFFSET;
}
pri = ca->ca_intpri;
vec = ca->ca_intvec;
if (vec == -1) {
/* Tell the FDC to fake an autovector. */
vec = 0x18 + pri; /* XXX */
isr_add_autovect(fdchwintr, fdc, pri);
} else {
/* An OBIO bus with vectors? Weird exception. */
isr_add_vectored(fdchwintr, fdc, pri, vec);
}
*fdc->sc_reg_fvr = vec; /* Program controller w/ interrupt vector */
fdc->sc_si = softint_establish(SOFTINT_BIO, fdcswintr, fdc);
#if 0
aprint_normal(": (softpri %d) chip 8207%c\n", FDC_SOFTPRI, code);
#else
aprint_normal(": chip 8207%c\n", code);
#endif
#ifdef FD_DEBUG
if (out_fdc(fdc, NE7CMD_VERSION) == 0 &&
fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x90) {
if (fdc_debug)
aprint_debug("[version cmd]");
}
#endif
fdc_reset(fdc);
/*
* Configure controller; enable FIFO, Implied seek, no POLL mode?.
* Note: CFG_EFIFO is active-low, initial threshold value: 8
*/
fdc->sc_cfg = CFG_EIS|/*CFG_EFIFO|*/CFG_POLL|(8 & CFG_THRHLD_MASK);
fdconf(fdc);
evcnt_attach_dynamic(&fdc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
device_xname(self), "intr");
/* physical limit: four drives per controller. */
for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
fa.fa_deftype = NULL; /* unknown */
fa.fa_deftype = &fd_types[0]; /* XXX */
(void)config_found(self, (void *)&fa, fdprint, CFARGS_NONE);
}
}
int
fdmatch(device_t parent, cfdata_t cf, void *aux)
{
struct fdc_softc *fdc = device_private(parent);
struct fdc_attach_args *fa = aux;
int drive = fa->fa_drive;
int n, ok;
if (drive > 0)
/* XXX - for now, punt > 1 drives */
return 0;
/* select drive and turn on motor */
fdc->sc_fcr |= FCR_DSEL(drive) | FCR_MTRON;
FCR_REG_SYNC();
/* wait for motor to spin up */
delay(250000);
fdc->sc_nstat = 0;
out_fdc(fdc, NE7CMD_RECAL);
out_fdc(fdc, drive);
/* wait for recalibrate */
for (n = 0; n < 10000; n++) {
delay(1000);
if ((*fdc->sc_reg_msr & (NE7_RQM|NE7_DIO|NE7_CB)) == NE7_RQM) {
/* wait a bit longer till device *really* is ready */
delay(100000);
if (out_fdc(fdc, NE7CMD_SENSEI))
break;
if (fdcresult(fdc) == 1 && fdc->sc_status[0] == 0x80)
/*
* Got `invalid command'; we interpret it
* to mean that the re-calibrate hasn't in
* fact finished yet
*/
continue;
break;
}
}
n = fdc->sc_nstat;
#ifdef FD_DEBUG
if (fdc_debug) {
int i;
aprint_debug("%s: %d stati:", __func__, n);
for (i = 0; i < n; i++)
aprint_debug(" %x", fdc->sc_status[i]);
aprint_debug("\n");
}
#endif
ok = (n == 2 && (fdc->sc_status[0] & 0xf8) == 0x20) ? 1 : 0;
/* turn off motor */
fdc->sc_fcr &= ~(FCR_DSEL(drive)|FCR_MTRON);
FCR_REG_SYNC();
return ok;
}
/*
* Controller is working, and drive responded. Attach it.
*/
void
fdattach(device_t parent, device_t self, void *aux)
{
struct fdc_softc *fdc = device_private(parent);
struct fd_softc *fd = device_private(self);
struct fdc_attach_args *fa = aux;
struct fd_type *type = fa->fa_deftype;
int drive = fa->fa_drive;
fd->sc_dv = self;
callout_init(&fd->sc_motoron_ch, 0);
callout_init(&fd->sc_motoroff_ch, 0);
/* XXX Allow `flags' to override device type? */
if (type)
aprint_normal(": %s %d cyl, %d head, %d sec\n", type->name,
type->tracks, type->heads, type->sectrac);
else
aprint_normal(": density unknown\n");
bufq_alloc(&fd->sc_q, "disksort", BUFQ_SORT_CYLINDER);
fd->sc_cylin = -1;
fd->sc_drive = drive;
fd->sc_deftype = type;
fdc->sc_fd[drive] = fd;
/*
* Initialize and attach the disk structure.
*/
disk_init(&fd->sc_dk, device_xname(self), &fddkdriver);
disk_attach(&fd->sc_dk);
#ifdef sparc
/*
* We're told if we're the boot device in fdcattach().
*/
if (fa->fa_bootpath)
fa->fa_bootpath->dev = self;
#endif
#define OUT_FDC(sc, c) do { \
if (out_fdc((sc), (c)) != 0) \
printf("fdc: specify command failed.\n"); \
} while (/* CONSTCOND */ 0)
/* specify command */
OUT_FDC(fdc, NE7CMD_SPECIFY);
OUT_FDC(fdc, type->steprate);
/*
* The '|1' in the following statement turns on the 'Non-DMA' bit
* specifier in the last byte of the SPECIFY command as described in the
* datasheet I have. This is necessary for the driver to work on the
* sun3x, because the system will not respond to the chip's requests
* for DMA; there is no hardware on the motherboard to support it.
* By enabling this bit, we will force the chip to interrupt when its
* FIFO is full, at which point the interrupt handler will empty it and
* continue. This is ``pseudo-DMA''.
* -J
*/
OUT_FDC(fdc, 6|1); /* XXX head load time == 6ms */
#undef OUT_FDC
/*
* Establish a mountroot_hook anyway in case we booted
* with RB_ASKNAME and get selected as the boot device.
*/
mountroothook_establish(fd_mountroot_hook, self);
/* Make sure the drive motor gets turned off at shutdown time. */
if (!pmf_device_register1(self, NULL, NULL, fd_shutdown))
aprint_error_dev(self, "couldn't establish power handler\n");
}
bool
fd_shutdown(device_t self, int howto)
{
struct fd_softc *fd;
fd = device_private(self);
fd_motor_off(fd);
return true;
}
static struct fd_type *
fd_dev_to_type(struct fd_softc *fd, dev_t dev)
{
int type = FDTYPE(dev);
if (type > (sizeof(fd_types) / sizeof(fd_types[0])))
return NULL;
return type ? &fd_types[type - 1] : fd->sc_deftype;
}
void
fdstrategy(struct buf *bp)
{
struct fd_softc *fd;
int unit = FDUNIT(bp->b_dev);
int sz;
int s;
/* Valid unit, controller, and request? */
if ((fd = device_lookup_private(&fd_cd, unit)) == 0 ||
bp->b_blkno < 0 ||
((bp->b_bcount % FDC_BSIZE) != 0 &&
(bp->b_flags & B_FORMAT) == 0)) {
bp->b_error = EINVAL;
goto done;
}
/* If it's a null transfer, return immediately. */
if (bp->b_bcount == 0)
goto done;
sz = howmany(bp->b_bcount, FDC_BSIZE);
if (bp->b_blkno + sz > fd->sc_type->size) {
sz = fd->sc_type->size - bp->b_blkno;
if (sz == 0) {
/* If exactly at end of disk, return EOF. */
bp->b_resid = bp->b_bcount;
goto done;
}
if (sz < 0) {
/* If past end of disk, return EINVAL. */
bp->b_error = EINVAL;
goto done;
}
/* Otherwise, truncate request. */
bp->b_bcount = sz << DEV_BSHIFT;
}
bp->b_rawblkno = bp->b_blkno;
bp->b_cylinder =
bp->b_blkno / (FDC_BSIZE / DEV_BSIZE) / fd->sc_type->seccyl;
#ifdef FD_DEBUG
if (fdc_debug > 1)
printf("%s: b_blkno %d b_bcount %d blkno %d cylin %d\n",
__func__, (int)bp->b_blkno, bp->b_bcount,
(int)fd->sc_blkno, bp->b_cylinder);
#endif
/* Queue transfer on drive, activate drive and controller if idle. */
s = splbio();
bufq_put(fd->sc_q, bp);
callout_stop(&fd->sc_motoroff_ch); /* a good idea */
if (fd->sc_active == 0)
fdstart(fd);
#ifdef DIAGNOSTIC
else {
struct fdc_softc *fdc;
fdc = device_private(device_parent(fd->sc_dv));
if (fdc->sc_state == DEVIDLE) {
printf("%s: controller inactive\n", __func__);
fdcstart(fdc);
}
}
#endif
splx(s);
return;
done:
/* Toss transfer; we're done early. */
biodone(bp);
}
void
fdstart(struct fd_softc *fd)
{
struct fdc_softc *fdc = device_private(device_parent(fd->sc_dv));
bool active = fdc->sc_drives.tqh_first != 0;
/* Link into controller queue. */
fd->sc_active = 1;
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
/* If controller not already active, start it. */
if (!active)
fdcstart(fdc);
}
void
fdfinish(struct fd_softc *fd, struct buf *bp)
{
struct fdc_softc *fdc = device_private(device_parent(fd->sc_dv));
/*
* Move this drive to the end of the queue to give others a `fair'
* chance. We only force a switch if N operations are completed while
* another drive is waiting to be serviced, since there is a long motor
* startup delay whenever we switch.
*/
(void)bufq_get(fd->sc_q);
if (TAILQ_NEXT(fd, sc_drivechain) && ++fd->sc_ops >= 8) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
if (bufq_peek(fd->sc_q) != NULL) {
TAILQ_INSERT_TAIL(&fdc->sc_drives, fd, sc_drivechain);
} else
fd->sc_active = 0;
}
bp->b_resid = fd->sc_bcount;
fd->sc_skip = 0;
biodone(bp);
/* turn off motor 5s from now */
callout_reset(&fd->sc_motoroff_ch, 5 * hz, fd_motor_off, fd);
fdc->sc_state = DEVIDLE;
}
void
fdc_reset(struct fdc_softc *fdc)
{
fdc->sc_fcr = 0;
FCR_REG_SYNC();
*fdc->sc_reg_drs = DRS_RESET;
delay(10);
*fdc->sc_reg_drs = 0;
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc reset\n");
#endif
}
void
fd_set_motor(struct fdc_softc *fdc)
{
struct fd_softc *fd;
int n;
int on = 0;
for (n = 0; n < 4; n++)
if ((fd = fdc->sc_fd[n]) && (fd->sc_flags & FD_MOTOR))
on = 1;
if (on) {
fdc->sc_fcr |= FCR_DSEL(0)|FCR_MTRON; /* XXX */
} else {
fdc->sc_fcr &= ~(FCR_DSEL(0)|FCR_MTRON); /* XXX */
}
FCR_REG_SYNC();
}
void
fd_motor_off(void *arg)
{
struct fd_softc *fd = arg;
int s;
s = splbio();
fd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
fd_set_motor(device_private(device_parent(fd->sc_dv)));
splx(s);
}
void
fd_motor_on(void *arg)
{
struct fd_softc *fd = arg;
struct fdc_softc *fdc = device_private(device_parent(fd->sc_dv));
int s;
s = splbio();
fd->sc_flags &= ~FD_MOTOR_WAIT;
if ((TAILQ_FIRST(&fdc->sc_drives) == fd) &&
(fdc->sc_state == MOTORWAIT))
(void)fdcstate(fdc);
splx(s);
}
int
fdcresult(struct fdc_softc *fdc)
{
uint8_t i;
int j, n = 0;
for (j = 100000; j; j--) {
i = *fdc->sc_reg_msr & (NE7_DIO | NE7_RQM | NE7_CB);
if (i == NE7_RQM) {
fdc->sc_nstat = n;
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++] = *fdc->sc_reg_fifo;
} else
delay(10);
}
log(LOG_ERR, "fdcresult: timeout\n");
fdc->sc_nstat = -1;
return -1;
}
int
out_fdc(struct fdc_softc *fdc, u_char x)
{
int i = 100000;
while (((*fdc->sc_reg_msr & (NE7_DIO|NE7_RQM)) != NE7_RQM) && i-- > 0)
delay(1);
if (i <= 0)
return -1;
*fdc->sc_reg_fifo = x;
return 0;
}
int
fdopen(dev_t dev, int flags, int fmt, struct lwp *l)
{
int unit, pmask;
struct fd_softc *fd;
struct fd_type *type;
unit = FDUNIT(dev);
fd = device_lookup_private(&fd_cd, unit);
if (fd == NULL)
return ENXIO;
type = fd_dev_to_type(fd, dev);
if (type == NULL)
return ENXIO;
if ((fd->sc_flags & FD_OPEN) != 0 &&
fd->sc_type != type)
return EBUSY;
fd->sc_type = type;
fd->sc_cylin = -1;
fd->sc_flags |= FD_OPEN;
/*
* Only update the disklabel if we're not open anywhere else.
*/
if (fd->sc_dk.dk_openmask == 0)
fdgetdisklabel(dev);
pmask = (1 << DISKPART(dev));
switch (fmt) {
case S_IFCHR:
fd->sc_dk.dk_copenmask |= pmask;
break;
case S_IFBLK:
fd->sc_dk.dk_bopenmask |= pmask;
break;
}
fd->sc_dk.dk_openmask =
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
return 0;
}
int
fdclose(dev_t dev, int flags, int fmt, struct lwp *l)
{
struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev));
int pmask = (1 << DISKPART(dev));
fd->sc_flags &= ~FD_OPEN;
fd->sc_opts &= ~(FDOPT_NORETRY|FDOPT_SILENT);
switch (fmt) {
case S_IFCHR:
fd->sc_dk.dk_copenmask &= ~pmask;
break;
case S_IFBLK:
fd->sc_dk.dk_bopenmask &= ~pmask;
break;
}
fd->sc_dk.dk_openmask =
fd->sc_dk.dk_copenmask | fd->sc_dk.dk_bopenmask;
return 0;
}
int
fdread(dev_t dev, struct uio *uio, int flag)
{
return physio(fdstrategy, NULL, dev, B_READ, minphys, uio);
}
int
fdwrite(dev_t dev, struct uio *uio, int flag)
{
return physio(fdstrategy, NULL, dev, B_WRITE, minphys, uio);
}
void
fdcstart(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("%s: not idle\n", __func__);
return;
}
#endif
(void)fdcstate(fdc);
}
static void
fdcpstatus(int n, struct fdc_softc *fdc)
{
char bits[64];
switch (n) {
case 0:
printf("\n");
break;
case 2:
snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]);
printf(" (st0 %s cyl %d)\n", bits, fdc->sc_status[1]);
break;
case 7:
snprintb(bits, sizeof(bits), NE7_ST0BITS, fdc->sc_status[0]);
printf(" (st0 %s", bits);
snprintb(bits, sizeof(bits), NE7_ST1BITS, fdc->sc_status[1]);
printf(" st1 %s", bits);
snprintb(bits, sizeof(bits), NE7_ST2BITS, fdc->sc_status[2]);
printf(" st2 %s", bits);
printf(" cyl %d head %d sec %d)\n",
fdc->sc_status[3], fdc->sc_status[4], fdc->sc_status[5]);
break;
#ifdef DIAGNOSTIC
default:
printf("\nfdcstatus: weird size");
break;
#endif
}
}
void
fdcstatus(device_t dv, int n, const char *s)
{
struct fdc_softc *fdc = device_private(device_parent(dv));
#if 0
/*
* A 82072 seems to return <invalid command> on
* gratuitous Sense Interrupt commands.
*/
if (n == 0 && (fdc->sc_flags & FDC_82077)) {
out_fdc(fdc, NE7CMD_SENSEI);
(void)fdcresult(fdc);
n = 2;
}
#endif
/* Just print last status */
n = fdc->sc_nstat;
printf("%s: %s: state %d", device_xname(dv), s, fdc->sc_state);
fdcpstatus(n, fdc);
}
void
fdctimeout(void *arg)
{
struct fdc_softc *fdc = arg;
struct fd_softc *fd = TAILQ_FIRST(&fdc->sc_drives);
int s;
s = splbio();
fdcstatus(fd->sc_dv, 0, "timeout");
if (bufq_peek(fd->sc_q) != NULL)
fdc->sc_state++;
else
fdc->sc_state = DEVIDLE;
(void)fdcstate(fdc);
splx(s);
}
void
fdcpseudointr(void *arg)
{
struct fdc_softc *fdc = arg;
int s;
/* Just ensure it has the right spl. */
s = splbio();
(void)fdcstate(fdc);
splx(s);
}
/*
* hardware interrupt entry point: must be converted to `fast'
* (in-window) handler.
*/
int
fdchwintr(void *arg)
{
struct fdc_softc *fdc = arg;
/*
* This code was reverse engineered from the SPARC bsd_fdintr.s.
*/
switch (fdc->sc_istate) {
case ISTATE_IDLE:
return 0;
case ISTATE_SENSEI:
out_fdc(fdc, NE7CMD_SENSEI);
fdcresult(fdc);
fdc->sc_istate = ISTATE_DONE;
FD_SET_SWINTR();
return 1;
case ISTATE_DMA:
break;
default:
log(LOG_ERR, "fdc: stray hard interrupt.\n");
fdc->sc_fcr &= ~(FCR_DSEL(0)); /* Does this help? */
fdc->sc_istate = ISTATE_SPURIOUS;
FD_SET_SWINTR();
return 1;
}
for (;;) {
int msr;
msr = *fdc->sc_reg_msr;
if ((msr & NE7_RQM) == 0)
break;
if ((msr & NE7_NDM) == 0) {
/* Execution phase finished, get result. */
fdcresult(fdc);
fdc->sc_istate = ISTATE_DONE;
FD_SET_SWINTR();
#ifdef FD_DEBUG
if (fdc_debug)
log(LOG_ERR, "fdc: overrun: tc = %d\n",
fdc->sc_tc);
#endif
break;
}
if (msr & NE7_DIO) {
*fdc->sc_data++ = *fdc->sc_reg_fifo;
} else {
*fdc->sc_reg_fifo = *fdc->sc_data++;
}
if (--fdc->sc_tc == 0) {
fdc->sc_fcr |= FCR_TC;
FCR_REG_SYNC();
delay(10);
fdc->sc_fcr &= ~FCR_TC;
FCR_REG_SYNC();
break;
}
}
return 1;
}
void
fdcswintr(void *arg)
{
struct fdc_softc *fdc = arg;
int s;
if (fdc->sc_istate != ISTATE_DONE)
return;
fdc->sc_istate = ISTATE_IDLE;
s = splbio();
fdcstate(fdc);
splx(s);
}
int
fdcstate(struct fdc_softc *fdc)
{
#define st0 fdc->sc_status[0]
#define st1 fdc->sc_status[1]
#define cyl fdc->sc_status[1]
#define OUT_FDC(fdc, c, s) \
do { \
if (out_fdc(fdc, (c))) { \
(fdc)->sc_state = (s); \
goto loop; \
} \
} while (/* CONSTCOND */ 0)
struct fd_softc *fd;
struct buf *bp;
int read, head, sec, nblks;
struct fd_type *type;
struct ne7_fd_formb *finfo = NULL;
if (fdc->sc_istate != ISTATE_IDLE) {
/* Trouble... */
printf("fdc: spurious interrupt: state %d, istate=%d\n",
fdc->sc_state, fdc->sc_istate);
fdc->sc_istate = ISTATE_IDLE;
if (fdc->sc_state == RESETCOMPLETE ||
fdc->sc_state == RESETTIMEDOUT) {
panic("%s: spurious interrupt can't be cleared",
__func__);
}
goto doreset;
}
loop:
/* Is there a drive for the controller to do a transfer with? */
fd = TAILQ_FIRST(&fdc->sc_drives);
if (fd == NULL) {
fdc->sc_state = DEVIDLE;
return 0;
}
/* Is there a transfer to this drive? If not, deactivate drive. */
bp = bufq_peek(fd->sc_q);
if (bp == NULL) {
fd->sc_ops = 0;
TAILQ_REMOVE(&fdc->sc_drives, fd, sc_drivechain);
fd->sc_active = 0;
goto loop;
}
if (bp->b_flags & B_FORMAT)
finfo = (struct ne7_fd_formb *)bp->b_data;
switch (fdc->sc_state) {
case DEVIDLE:
fdc->sc_errors = 0;
fd->sc_skip = 0;
fd->sc_bcount = bp->b_bcount;
fd->sc_blkno = bp->b_blkno / (FDC_BSIZE / DEV_BSIZE);
callout_stop(&fd->sc_motoroff_ch);
if ((fd->sc_flags & FD_MOTOR_WAIT) != 0) {
fdc->sc_state = MOTORWAIT;
return 1;
}
if ((fd->sc_flags & FD_MOTOR) == 0) {
/* Turn on the motor, being careful about pairing. */
struct fd_softc *ofd = fdc->sc_fd[fd->sc_drive ^ 1];
if (ofd && ofd->sc_flags & FD_MOTOR) {
callout_stop(&ofd->sc_motoroff_ch);
ofd->sc_flags &= ~(FD_MOTOR | FD_MOTOR_WAIT);
}
fd->sc_flags |= FD_MOTOR | FD_MOTOR_WAIT;
fd_set_motor(fdc);
fdc->sc_state = MOTORWAIT;
if (fdc->sc_flags & FDC_82077) { /* XXX */
/* Allow .25s for motor to stabilize. */
callout_reset(&fd->sc_motoron_ch, hz / 4,
fd_motor_on, fd);
} else {
fd->sc_flags &= ~FD_MOTOR_WAIT;
goto loop;
}
return 1;
}
/* Make sure the right drive is selected. */
fd_set_motor(fdc);
/*FALLTHROUGH*/
case DOSEEK:
doseek:
if ((fdc->sc_flags & FDC_EIS) &&
(bp->b_flags & B_FORMAT) == 0) {
fd->sc_cylin = bp->b_cylinder;
/* We use implied seek */
goto doio;
}
if (fd->sc_cylin == bp->b_cylinder)
goto doio;
/* specify command */
OUT_FDC(fdc, NE7CMD_SPECIFY, SEEKTIMEDOUT);
OUT_FDC(fdc, fd->sc_type->steprate, SEEKTIMEDOUT);
OUT_FDC(fdc, 6|1, SEEKTIMEDOUT); /* XXX head load time == 6ms */
fdc->sc_istate = ISTATE_SENSEI;
/* seek function */
OUT_FDC(fdc, NE7CMD_SEEK, SEEKTIMEDOUT);
OUT_FDC(fdc, fd->sc_drive, SEEKTIMEDOUT); /* drive number */
OUT_FDC(fdc, bp->b_cylinder * fd->sc_type->step, SEEKTIMEDOUT);
fd->sc_cylin = -1;
fdc->sc_state = SEEKWAIT;
fdc->sc_nstat = 0;
iostat_seek(fd->sc_dk.dk_stats);
disk_busy(&fd->sc_dk);
callout_reset(&fdc->sc_timo_ch, 4 * hz, fdctimeout, fdc);
return 1;
case DOIO:
doio:
#ifdef NOTYET
/* Check to see if the disk has changed */
if (fdc->sc_reg_dir & FDI_DCHG) {
/*
* The disk in the drive has changed since
* the last transfer. We need to see if its geometry
* has changed.
*/
}
#endif /* NOTYET */
if (finfo)
fd->sc_skip = (char *)&(finfo->fd_formb_cylno(0)) -
(char *)finfo;
type = fd->sc_type;
sec = fd->sc_blkno % type->seccyl;
nblks = type->seccyl - sec;
nblks = uimin(nblks, fd->sc_bcount / FDC_BSIZE);
nblks = uimin(nblks, FDC_MAXIOSIZE / FDC_BSIZE);
fd->sc_nblks = nblks;
fd->sc_nbytes = finfo ? bp->b_bcount : nblks * FDC_BSIZE;
head = sec / type->sectrac;
sec -= head * type->sectrac;
#ifdef DIAGNOSTIC
{
int block;
block = (fd->sc_cylin * type->heads + head) *
type->sectrac + sec;
if (block != fd->sc_blkno) {
printf("%s: block %d != blkno %" PRIu64 "\n",
device_xname(fdc->sc_dev), block,
fd->sc_blkno);
#ifdef DDB
Debugger();
#endif
}
}
#endif
read = bp->b_flags & B_READ;
/* Setup for pseudo DMA */
fdc->sc_data = (char *)bp->b_data + fd->sc_skip;
fdc->sc_tc = fd->sc_nbytes;
*fdc->sc_reg_drs = type->rate;
#ifdef FD_DEBUG
if (fdc_debug > 1)
printf("%s: %s drive %d track %d head %d sec %d "
"nblks %d\n", __func__,
read ? "read" : "write", fd->sc_drive,
fd->sc_cylin, head, sec, nblks);
#endif
fdc->sc_state = IOCOMPLETE;
fdc->sc_istate = ISTATE_DMA;
fdc->sc_nstat = 0;
if (finfo) {
/* formatting */
OUT_FDC(fdc, NE7CMD_FORMAT, IOTIMEDOUT);
OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_secshift, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_nsecs, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_gaplen, IOTIMEDOUT);
OUT_FDC(fdc, finfo->fd_formb_fillbyte, IOTIMEDOUT);
} else {
if (read)
OUT_FDC(fdc, NE7CMD_READ, IOTIMEDOUT);
else
OUT_FDC(fdc, NE7CMD_WRITE, IOTIMEDOUT);
OUT_FDC(fdc, (head << 2) | fd->sc_drive, IOTIMEDOUT);
OUT_FDC(fdc, fd->sc_cylin, IOTIMEDOUT); /*track*/
OUT_FDC(fdc, head, IOTIMEDOUT);
OUT_FDC(fdc, sec + 1, IOTIMEDOUT); /*sector+1*/
OUT_FDC(fdc, type->secsize, IOTIMEDOUT);/*sector size*/
OUT_FDC(fdc, type->sectrac, IOTIMEDOUT);/*secs/track*/
OUT_FDC(fdc, type->gap1, IOTIMEDOUT); /*gap1 size*/
OUT_FDC(fdc, type->datalen, IOTIMEDOUT);/*data length*/
}
disk_busy(&fd->sc_dk);
/* allow 2 seconds for operation */
callout_reset(&fdc->sc_timo_ch, 2 * hz, fdctimeout, fdc);
return 1; /* will return later */
case SEEKWAIT:
callout_stop(&fdc->sc_timo_ch);
fdc->sc_state = SEEKCOMPLETE;
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
/* allow 1/50 second for heads to settle */
callout_reset(&fdc->sc_intr_ch, hz / 50,
fdcpseudointr, fdc);
return 1; /* will return later */
}
/*FALLTHROUGH*/
case SEEKCOMPLETE:
/* no data on seek */
disk_unbusy(&fd->sc_dk, 0, 0);
/* Make sure seek really happened. */
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 ||
cyl != bp->b_cylinder * fd->sc_type->step) {
#ifdef FD_DEBUG
if (fdc_debug)
fdcstatus(fd->sc_dv, 2, "seek failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = bp->b_cylinder;
goto doio;
case IOTIMEDOUT:
fdc->sc_fcr |= FCR_TC;
FCR_REG_SYNC();
delay(10);
fdc->sc_fcr &= ~FCR_TC;
FCR_REG_SYNC();
(void)fdcresult(fdc);
/* FALLTHROUGH */
case SEEKTIMEDOUT:
case RECALTIMEDOUT:
case RESETTIMEDOUT:
fdcretry(fdc);
goto loop;
case IOCOMPLETE: /* IO DONE, post-analyze */
callout_stop(&fdc->sc_timo_ch);
disk_unbusy(&fd->sc_dk, (bp->b_bcount - bp->b_resid),
(bp->b_flags & B_READ));
if (fdc->sc_nstat != 7 || (st0 & 0xf8) != 0 || st1 != 0) {
#ifdef FD_DEBUG
if (fdc_debug) {
fdcstatus(fd->sc_dv, 7,
bp->b_flags & B_READ
? "read failed" : "write failed");
printf("blkno %d nblks %d tc %d\n",
(int)fd->sc_blkno, fd->sc_nblks,
fdc->sc_tc);
}
#endif
if (fdc->sc_nstat == 7 &&
(st1 & ST1_OVERRUN) == ST1_OVERRUN) {
/*
* Silently retry overruns if no other
* error bit is set. Adjust threshold.
*/
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
if (thr < 15) {
thr++;
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc: %d -> threshold\n",
thr);
#endif
fdconf(fdc);
fdc->sc_overruns = 0;
}
if (++fdc->sc_overruns < 3) {
fdc->sc_state = DOIO;
goto loop;
}
}
fdcretry(fdc);
goto loop;
}
if (fdc->sc_errors) {
diskerr(bp, "fd", "soft error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE, NULL);
printf("\n");
fdc->sc_errors = 0;
} else {
if (--fdc->sc_overruns < -20) {
int thr = fdc->sc_cfg & CFG_THRHLD_MASK;
if (thr > 0) {
thr--;
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
fdc->sc_cfg |= (thr & CFG_THRHLD_MASK);
#ifdef FD_DEBUG
if (fdc_debug)
printf("fdc: %d -> threshold\n",
thr);
#endif
fdconf(fdc);
}
fdc->sc_overruns = 0;
}
}
fd->sc_blkno += fd->sc_nblks;
fd->sc_skip += fd->sc_nbytes;
fd->sc_bcount -= fd->sc_nbytes;
if (!finfo && fd->sc_bcount > 0) {
bp->b_cylinder = fd->sc_blkno / fd->sc_type->seccyl;
goto doseek;
}
fdfinish(fd, bp);
goto loop;
case DORESET:
doreset:
/* try a reset, keep motor on */
fd_set_motor(fdc);
delay(100);
fdc_reset(fdc);
fdc->sc_nstat = 0;
fdc->sc_istate = ISTATE_SENSEI;
fdc->sc_state = RESETCOMPLETE;
callout_reset(&fdc->sc_timo_ch, hz / 2, fdctimeout, fdc);
return 1; /* will return later */
case RESETCOMPLETE:
callout_stop(&fdc->sc_timo_ch);
fdconf(fdc);
/* FALLTHROUGH */
case DORECAL:
fdc->sc_state = RECALWAIT;
fdc->sc_istate = ISTATE_SENSEI;
fdc->sc_nstat = 0;
/* recalibrate function */
OUT_FDC(fdc, NE7CMD_RECAL, RECALTIMEDOUT);
OUT_FDC(fdc, fd->sc_drive, RECALTIMEDOUT);
callout_reset(&fdc->sc_timo_ch, 5 * hz, fdctimeout, fdc);
return 1; /* will return later */
case RECALWAIT:
callout_stop(&fdc->sc_timo_ch);
fdc->sc_state = RECALCOMPLETE;
if (fdc->sc_flags & FDC_NEEDHEADSETTLE) {
/* allow 1/30 second for heads to settle */
callout_reset(&fdc->sc_intr_ch, hz / 30,
fdcpseudointr, fdc);
return 1; /* will return later */
}
case RECALCOMPLETE:
if (fdc->sc_nstat != 2 || (st0 & 0xf8) != 0x20 || cyl != 0) {
#ifdef FD_DEBUG
if (fdc_debug)
fdcstatus(fd->sc_dv, 2, "recalibrate failed");
#endif
fdcretry(fdc);
goto loop;
}
fd->sc_cylin = 0;
goto doseek;
case MOTORWAIT:
if (fd->sc_flags & FD_MOTOR_WAIT)
return 1; /* time's not up yet */
goto doseek;
default:
fdcstatus(fd->sc_dv, 0, "stray interrupt");
return 1;
}
#ifdef DIAGNOSTIC
panic("%s: impossible", __func__);
#endif
#undef st0
#undef st1
#undef cyl
}
void
fdcretry(struct fdc_softc *fdc)
{
struct fd_softc *fd;
struct buf *bp;
fd = fdc->sc_drives.tqh_first;
bp = bufq_peek(fd->sc_q);
fdc->sc_overruns = 0;
if (fd->sc_opts & FDOPT_NORETRY)
goto fail;
switch (fdc->sc_errors) {
case 0:
/* try again */
fdc->sc_state =
(fdc->sc_flags & FDC_EIS) ? DOIO : DOSEEK;
break;
case 1:
case 2:
case 3:
/* didn't work; try recalibrating */
fdc->sc_state = DORECAL;
break;
case 4:
/* still no go; reset the bastard */
fdc->sc_state = DORESET;
break;
default:
fail:
if ((fd->sc_opts & FDOPT_SILENT) == 0) {
diskerr(bp, "fd", "hard error", LOG_PRINTF,
fd->sc_skip / FDC_BSIZE, NULL);
fdcpstatus(7, fdc);
}
bp->b_error = EIO;
fdfinish(fd, bp);
}
fdc->sc_errors++;
}
int
fdioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
{
struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev));
struct fdformat_parms *form_parms;
struct fdformat_cmd *form_cmd;
struct ne7_fd_formb *fd_formb;
int il[FD_MAX_NSEC + 1];
int i, j;
int error;
switch (cmd) {
case DIOCGDINFO:
*(struct disklabel *)addr = *(fd->sc_dk.dk_label);
return 0;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return EBADF;
/* XXX do something */
return 0;
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return EBADF;
error = setdisklabel(fd->sc_dk.dk_label,
(struct disklabel *)addr, 0, fd->sc_dk.dk_cpulabel);
if (error)
return error;
error = writedisklabel(dev, fdstrategy, fd->sc_dk.dk_label,
fd->sc_dk.dk_cpulabel);
return error;
case DIOCLOCK:
/*
* Nothing to do here, really.
*/
return 0;
case DIOCEJECT:
if (*(int *)addr == 0) {
int part = DISKPART(dev);
/*
* Don't force eject: check that we are the only
* partition open. If so, unlock it.
*/
if ((fd->sc_dk.dk_openmask & ~(1 << part)) != 0 ||
fd->sc_dk.dk_bopenmask + fd->sc_dk.dk_copenmask !=
fd->sc_dk.dk_openmask) {
return EBUSY;
}
}
/* FALLTHROUGH */
case ODIOCEJECT:
fd_do_eject(device_private(device_parent(fd->sc_dv)),
fd->sc_drive);
return 0;
case FDIOCGETFORMAT:
form_parms = (struct fdformat_parms *)addr;
form_parms->fdformat_version = FDFORMAT_VERSION;
form_parms->nbps = 128 * (1 << fd->sc_type->secsize);
form_parms->ncyl = fd->sc_type->tracks;
form_parms->nspt = fd->sc_type->sectrac;
form_parms->ntrk = fd->sc_type->heads;
form_parms->stepspercyl = fd->sc_type->step;
form_parms->gaplen = fd->sc_type->gap2;
form_parms->fillbyte = fd->sc_type->fillbyte;
form_parms->interleave = fd->sc_type->interleave;
switch (fd->sc_type->rate) {
case FDC_500KBPS:
form_parms->xfer_rate = 500 * 1024;
break;
case FDC_300KBPS:
form_parms->xfer_rate = 300 * 1024;
break;
case FDC_250KBPS:
form_parms->xfer_rate = 250 * 1024;
break;
default:
return EINVAL;
}
return 0;
case FDIOCSETFORMAT:
if ((flag & FWRITE) == 0)
return EBADF; /* must be opened for writing */
form_parms = (struct fdformat_parms *)addr;
if (form_parms->fdformat_version != FDFORMAT_VERSION)
return EINVAL; /* wrong version of formatting prog */
i = form_parms->nbps >> 7;
if ((form_parms->nbps & 0x7f) || ffs(i) == 0 ||
i & ~(1 << (ffs(i) - 1)))
/* not a power-of-two multiple of 128 */
return EINVAL;
switch (form_parms->xfer_rate) {
case 500 * 1024:
fd->sc_type->rate = FDC_500KBPS;
break;
case 300 * 1024:
fd->sc_type->rate = FDC_300KBPS;
break;
case 250 * 1024:
fd->sc_type->rate = FDC_250KBPS;
break;
default:
return EINVAL;
}
if (form_parms->nspt > FD_MAX_NSEC ||
form_parms->fillbyte > 0xff ||
form_parms->interleave > 0xff)
return EINVAL;
fd->sc_type->sectrac = form_parms->nspt;
if (form_parms->ntrk != 2 && form_parms->ntrk != 1)
return EINVAL;
fd->sc_type->heads = form_parms->ntrk;
fd->sc_type->seccyl = form_parms->nspt * form_parms->ntrk;
fd->sc_type->secsize = ffs(i) - 1;
fd->sc_type->gap2 = form_parms->gaplen;
fd->sc_type->tracks = form_parms->ncyl;
fd->sc_type->size = fd->sc_type->seccyl * form_parms->ncyl *
form_parms->nbps / DEV_BSIZE;
fd->sc_type->step = form_parms->stepspercyl;
fd->sc_type->fillbyte = form_parms->fillbyte;
fd->sc_type->interleave = form_parms->interleave;
return 0;
case FDIOCFORMAT_TRACK:
if((flag & FWRITE) == 0)
/* must be opened for writing */
return EBADF;
form_cmd = (struct fdformat_cmd *)addr;
if (form_cmd->formatcmd_version != FDFORMAT_VERSION)
/* wrong version of formatting prog */
return EINVAL;
if (form_cmd->head >= fd->sc_type->heads ||
form_cmd->cylinder >= fd->sc_type->tracks) {
return EINVAL;
}
fd_formb = kmem_alloc(sizeof(*fd_formb), KM_SLEEP);
fd_formb->head = form_cmd->head;
fd_formb->cyl = form_cmd->cylinder;
fd_formb->transfer_rate = fd->sc_type->rate;
fd_formb->fd_formb_secshift = fd->sc_type->secsize;
fd_formb->fd_formb_nsecs = fd->sc_type->sectrac;
fd_formb->fd_formb_gaplen = fd->sc_type->gap2;
fd_formb->fd_formb_fillbyte = fd->sc_type->fillbyte;
memset(il, 0, sizeof(il));
for (j = 0, i = 1; i <= fd_formb->fd_formb_nsecs; i++) {
while (il[(j%fd_formb->fd_formb_nsecs) + 1])
j++;
il[(j % fd_formb->fd_formb_nsecs) + 1] = i;
j += fd->sc_type->interleave;
}
for (i = 0; i < fd_formb->fd_formb_nsecs; i++) {
fd_formb->fd_formb_cylno(i) = form_cmd->cylinder;
fd_formb->fd_formb_headno(i) = form_cmd->head;
fd_formb->fd_formb_secno(i) = il[i+1];
fd_formb->fd_formb_secsize(i) = fd->sc_type->secsize;
}
error = fdformat(dev, fd_formb, l->l_proc);
kmem_free(fd_formb, sizeof(*fd_formb));
return error;
case FDIOCGETOPTS: /* get drive options */
*(int *)addr = fd->sc_opts;
return 0;
case FDIOCSETOPTS: /* set drive options */
fd->sc_opts = *(int *)addr;
return 0;
#ifdef DEBUG
case _IO('f', 100):
{
int k;
struct fdc_softc *fdc =
device_private(device_parent(fd->sc_dv));
out_fdc(fdc, NE7CMD_DUMPREG);
fdcresult(fdc);
printf("dumpreg(%d regs): <", fdc->sc_nstat);
for (k = 0; k < fdc->sc_nstat; k++)
printf(" %x", fdc->sc_status[k]);
printf(">\n");
return 0;
}
case _IOW('f', 101, int):
{
struct fdc_softc *fdc =
device_private(device_parent(fd->sc_dv));
fdc->sc_cfg &= ~CFG_THRHLD_MASK;
fdc->sc_cfg |= (*(int *)addr & CFG_THRHLD_MASK);
fdconf(fdc);
return 0;
}
case _IO('f', 102):
{
int k;
struct fdc_softc *fdc =
device_private(device_parent(fd->sc_dv));
out_fdc(fdc, NE7CMD_SENSEI);
fdcresult(fdc);
printf("sensei(%d regs): <", fdc->sc_nstat);
for (k=0; k < fdc->sc_nstat; k++)
printf(" 0x%x", fdc->sc_status[k]);
printf(">\n");
return 0;
}
#endif
default:
return ENOTTY;
}
#ifdef DIAGNOSTIC
panic("%s: impossible", __func__);
#endif
}
int
fdformat(dev_t dev, struct ne7_fd_formb *finfo, struct proc *p)
{
int rv = 0;
struct fd_softc *fd = device_lookup_private(&fd_cd, FDUNIT(dev));
struct fd_type *type = fd->sc_type;
struct buf *bp;
/* set up a buffer header for fdstrategy() */
bp = getiobuf(NULL, false);
if (bp == NULL)
return ENOBUFS;
bp->b_vp = NULL;
bp->b_cflags = BC_BUSY;
bp->b_flags = B_PHYS | B_FORMAT;
bp->b_proc = p;
bp->b_dev = dev;
/*
* Calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder.
*/
bp->b_blkno = (finfo->cyl * (type->sectrac * type->heads)
+ finfo->head * type->sectrac) * FDC_BSIZE / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_data = (void *)finfo;
#ifdef FD_DEBUG
if (fdc_debug)
printf("%s: blkno %x count %d\n",
__func__, (int)bp->b_blkno, bp->b_bcount);
#endif
/* now do the format */
fdstrategy(bp);
/* ...and wait for it to complete */
rv = biowait(bp);
putiobuf(bp);
return rv;
}
void
fdgetdisklabel(dev_t dev)
{
int unit = FDUNIT(dev), i;
struct fd_softc *fd = device_lookup_private(&fd_cd, unit);
struct disklabel *lp = fd->sc_dk.dk_label;
struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel;
memset(lp, 0, sizeof(struct disklabel));
memset(clp, 0, sizeof(struct cpu_disklabel));
lp->d_type = DKTYPE_FLOPPY;
lp->d_secsize = FDC_BSIZE;
lp->d_secpercyl = fd->sc_type->seccyl;
lp->d_nsectors = fd->sc_type->sectrac;
lp->d_ncylinders = fd->sc_type->tracks;
lp->d_ntracks = fd->sc_type->heads; /* Go figure... */
lp->d_rpm = 3600; /* XXX like it matters... */
strncpy(lp->d_typename, "floppy", sizeof(lp->d_typename));
strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
lp->d_interleave = 1;
lp->d_partitions[RAW_PART].p_offset = 0;
lp->d_partitions[RAW_PART].p_size = lp->d_secpercyl * lp->d_ncylinders;
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
lp->d_npartitions = RAW_PART + 1;
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_checksum = dkcksum(lp);
/*
* Call the generic disklabel extraction routine. If there's
* not a label there, fake it.
*/
if (readdisklabel(dev, fdstrategy, lp, clp) != NULL) {
strncpy(lp->d_packname, "default label",
sizeof(lp->d_packname));
/*
* Reset the partition info; it might have gotten
* trashed in readdisklabel().
*
* XXX Why do we have to do this? readdisklabel()
* should be safe...
*/
for (i = 0; i < MAXPARTITIONS; ++i) {
lp->d_partitions[i].p_offset = 0;
if (i == RAW_PART) {
lp->d_partitions[i].p_size =
lp->d_secpercyl * lp->d_ncylinders;
lp->d_partitions[i].p_fstype = FS_BSDFFS;
} else {
lp->d_partitions[i].p_size = 0;
lp->d_partitions[i].p_fstype = FS_UNUSED;
}
}
lp->d_npartitions = RAW_PART + 1;
}
}
void
fd_do_eject(struct fdc_softc *fdc, int unit)
{
fdc->sc_fcr |= FCR_DSEL(unit)|FCR_EJECT;
FCR_REG_SYNC();
delay(10);
fdc->sc_fcr &= ~(FCR_DSEL(unit)|FCR_EJECT);
FCR_REG_SYNC();
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
int fd_read_md_image(size_t *, void **);
#endif
/* ARGSUSED */
void
fd_mountroot_hook(device_t dev)
{
struct fd_softc *fd;
struct fdc_softc *fdc;
int c;
fd = device_private(dev);
fdc = device_private(device_parent(dev));
fd_do_eject(fdc, fd->sc_drive);
printf("Insert filesystem floppy and press return.");
for (;;) {
c = cngetc();
if ((c == '\r') || (c == '\n')) {
printf("\n");
break;
}
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
{
extern int (*md_read_image)(size_t *, void **);
md_read_image = fd_read_md_image;
}
#endif
}
#ifdef MEMORY_DISK_HOOKS_sun3x_not_yet
#define FDMICROROOTSIZE ((2*18*80) << DEV_BSHIFT)
int
fd_read_md_image(size_t *sizep, void **addrp)
{
struct fdc_softc *fdc;
struct fd_softc *fd;
struct buf buf, *bp = &buf;
dev_t dev;
off_t offset;
void *addr;
dev = makedev(cdevsw_lookup_major(&fd_cdevsw), 0); /* XXX */
addr = kmem_alloc(FDMICROROOTSIZE, KM_SLEEP);
*addrp = addr;
if (fdopen(dev, 0, S_IFCHR, NULL))
panic("fd: mountroot: fdopen");
offset = 0;
for (;;) {
bp->b_dev = dev;
bp->b_error = 0;
bp->b_resid = 0;
bp->b_proc = NULL;
bp->b_flags = B_PHYS | B_RAW | B_READ;
bp->b_cflags = BC_BUSY;
bp->b_blkno = btodb(offset);
bp->b_bcount = DEV_BSIZE;
bp->b_data = addr;
fdstrategy(bp);
biowait(bp);
if (bp->b_error)
panic("fd: mountroot: fdread error %d", bp->b_error);
if (bp->b_resid != 0)
break;
addr += DEV_BSIZE;
offset += DEV_BSIZE;
if (offset + DEV_BSIZE > FDMICROROOTSIZE)
break;
}
(void)fdclose(dev, 0, S_IFCHR, NULL);
*sizep = offset;
fd = device_lookup_private(&fd_cd, 0);
fdc = device_private(device_parent(fd->sc_dv));
fd_do_eject(fdc, 0); /* XXX */
return 0;
}
#endif