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a2639a184d
freebsd/sys/isa/fd.c
Peter Wemm a2639a184d Add a truely evil workaround (hack!) for some unfortunate BIOS 
programming practices.  It seems that newer fdc chips have an
alternative way of setting the transfer speed (including high speed
modes for floppy tape) that doesn't use the control register (which
we don't support - we use the old way only).  So, they (the BIOS
programmers) sometimes leave out the 0x3f6 control register from
the PnP ports descriptor(!!).  "Hey, it works with windows, so
what's the problem?" :-(  Anyway, this hack tries to compensate
for that.  This was discussed with dfr (who did the pnp attachment).
1999-12-06 06:59:09 +00:00

2376 lines
59 KiB
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/*
* 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.
*
* Libretto PCMCIA floppy support by David Horwitt (dhorwitt@ucsd.edu)
* aided by the Linux floppy driver modifications from David Bateman
* (dbateman@eng.uts.edu.au).
*
* Copyright (c) 1993, 1994 by
* jc@irbs.UUCP (John Capo)
* vak@zebub.msk.su (Serge Vakulenko)
* ache@astral.msk.su (Andrew A. Chernov)
*
* Copyright (c) 1993, 1994, 1995 by
* joerg_wunsch@uriah.sax.de (Joerg Wunsch)
* dufault@hda.com (Peter Dufault)
*
* 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.
*
* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
* $FreeBSD$
*
*/
#include "opt_fdc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disklabel.h>
#include <sys/devicestat.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/clock.h>
#include <machine/ioctl_fd.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#include <isa/isareg.h>
#include <isa/fdreg.h>
#include <isa/fdc.h>
#include <isa/rtc.h>
#ifdef FDC_YE
#undef FDC_YE
#warning "fix FDC_YE! - newbus casualty"
#endif
/* misuse a flag to identify format operation */
#define B_FORMAT B_XXX
/* configuration flags */
#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
#ifdef FDC_YE
#define FDC_IS_PCMCIA (1 << 1) /* if successful probe, then it's
a PCMCIA device */
#endif
/* internally used only, not really from CMOS: */
#define RTCFDT_144M_PRETENDED 0x1000
/* error returns for fd_cmd() */
#define FD_FAILED -1
#define FD_NOT_VALID -2
#define FDC_ERRMAX 100 /* do not log more */
#define NUMTYPES 14
#define NUMDENS (NUMTYPES - 6)
/* These defines (-1) must match index for fd_types */
#define F_TAPE_TYPE 0x020 /* bit for fd_types to indicate tape */
#define NO_TYPE 0 /* must match NO_TYPE in ft.c */
#define FD_1720 1
#define FD_1480 2
#define FD_1440 3
#define FD_1200 4
#define FD_820 5
#define FD_800 6
#define FD_720 7
#define FD_360 8
#define FD_1480in5_25 9
#define FD_1440in5_25 10
#define FD_820in5_25 11
#define FD_800in5_25 12
#define FD_720in5_25 13
#define FD_360in5_25 14
static struct fd_type fd_types[NUMTYPES] =
{
{ 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
{ 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
{ 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
{ 15,2,0xFF,0x1B,80,2400,1,FDC_500KBPS,2,0x54,1 }, /* 1.2M in HD 5.25/3.5 */
{ 10,2,0xFF,0x10,82,1640,1,FDC_250KBPS,2,0x2E,1 }, /* 820K in HD 3.5in */
{ 10,2,0xFF,0x10,80,1600,1,FDC_250KBPS,2,0x2E,1 }, /* 800K in HD 3.5in */
{ 9,2,0xFF,0x20,80,1440,1,FDC_250KBPS,2,0x50,1 }, /* 720K in HD 3.5in */
{ 9,2,0xFF,0x2A,40, 720,1,FDC_250KBPS,2,0x50,1 }, /* 360K in DD 5.25in */
{ 18,2,0xFF,0x02,82,2952,1,FDC_500KBPS,2,0x02,2 }, /* 1.48M in HD 5.25in */
{ 18,2,0xFF,0x02,80,2880,1,FDC_500KBPS,2,0x02,2 }, /* 1.44M in HD 5.25in */
{ 10,2,0xFF,0x10,82,1640,1,FDC_300KBPS,2,0x2E,1 }, /* 820K in HD 5.25in */
{ 10,2,0xFF,0x10,80,1600,1,FDC_300KBPS,2,0x2E,1 }, /* 800K in HD 5.25in */
{ 9,2,0xFF,0x20,80,1440,1,FDC_300KBPS,2,0x50,1 }, /* 720K in HD 5.25in */
{ 9,2,0xFF,0x23,40, 720,2,FDC_300KBPS,2,0x50,1 }, /* 360K in HD 5.25in */
};
#define DRVS_PER_CTLR 2 /* 2 floppies */
/***********************************************************************\
* Per controller structure. *
\***********************************************************************/
static devclass_t fdc_devclass;
/***********************************************************************\
* Per drive structure. *
* N per controller (DRVS_PER_CTLR) *
\***********************************************************************/
struct fd_data {
struct fdc_data *fdc; /* pointer to controller structure */
int fdsu; /* this units number on this controller */
int type; /* Drive type (FD_1440...) */
struct fd_type *ft; /* pointer to the type descriptor */
int flags;
#define FD_OPEN 0x01 /* it's open */
#define FD_ACTIVE 0x02 /* it's active */
#define FD_MOTOR 0x04 /* motor should be on */
#define FD_MOTOR_WAIT 0x08 /* motor coming up */
int skip;
int hddrv;
#define FD_NO_TRACK -2
int track; /* where we think the head is */
int options; /* user configurable options, see ioctl_fd.h */
struct callout_handle toffhandle;
struct callout_handle tohandle;
struct devstat device_stats;
device_t dev;
fdu_t fdu;
};
static devclass_t fd_devclass;
/***********************************************************************\
* Throughout this file the following conventions will be used: *
* fd is a pointer to the fd_data struct for the drive in question *
* fdc is a pointer to the fdc_data struct for the controller *
* fdu is the floppy drive unit number *
* fdcu is the floppy controller unit number *
* fdsu is the floppy drive unit number on that controller. (sub-unit) *
\***********************************************************************/
#ifdef FDC_YE
#include "card.h"
static int yeattach(struct isa_device *);
#endif
/* needed for ft driver, thus exported */
int in_fdc(struct fdc_data *);
int out_fdc(struct fdc_data *, int);
/* internal functions */
static void fdc_add_device(device_t, const char *, int);
static void fdc_intr(void *);
static void set_motor(struct fdc_data *, int, int);
# define TURNON 1
# define TURNOFF 0
static timeout_t fd_turnoff;
static timeout_t fd_motor_on;
static void fd_turnon(struct fd_data *);
static void fdc_reset(fdc_p);
static int fd_in(struct fdc_data *, int *);
static void fdstart(struct fdc_data *);
static timeout_t fd_iotimeout;
static timeout_t fd_pseudointr;
static int fdstate(struct fdc_data *);
static int retrier(struct fdc_data *);
static int fdformat(dev_t, struct fd_formb *, struct proc *);
static int enable_fifo(fdc_p fdc);
static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
#define DEVIDLE 0
#define FINDWORK 1
#define DOSEEK 2
#define SEEKCOMPLETE 3
#define IOCOMPLETE 4
#define RECALCOMPLETE 5
#define STARTRECAL 6
#define RESETCTLR 7
#define SEEKWAIT 8
#define RECALWAIT 9
#define MOTORWAIT 10
#define IOTIMEDOUT 11
#define RESETCOMPLETE 12
#ifdef FDC_YE
#define PIOREAD 13
#endif
#ifdef FDC_DEBUG
static char const * const fdstates[] =
{
"DEVIDLE",
"FINDWORK",
"DOSEEK",
"SEEKCOMPLETE",
"IOCOMPLETE",
"RECALCOMPLETE",
"STARTRECAL",
"RESETCTLR",
"SEEKWAIT",
"RECALWAIT",
"MOTORWAIT",
"IOTIMEDOUT",
"RESETCOMPLETE",
#ifdef FDC_YE
"PIOREAD",
#endif
};
/* CAUTION: fd_debug causes huge amounts of logging output */
static int volatile fd_debug = 0;
#define TRACE0(arg) if(fd_debug) printf(arg)
#define TRACE1(arg1, arg2) if(fd_debug) printf(arg1, arg2)
#else /* FDC_DEBUG */
#define TRACE0(arg)
#define TRACE1(arg1, arg2)
#endif /* FDC_DEBUG */
static void
fdout_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
}
static u_int8_t
fdsts_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDSTS+fdc->port_off);
}
static void
fddata_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off, v);
}
static u_int8_t
fddata_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDDATA+fdc->port_off);
}
static void
fdctl_wr(fdc_p fdc, u_int8_t v)
{
if (fdc->flags & FDC_ISPNP)
bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
else
bus_space_write_1(fdc->portt, fdc->porth, FDCTL, v);
}
#if 0
static u_int8_t
fdin_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
}
#endif
#ifdef FDC_YE
#if NCARD > 0
#include <sys/select.h>
#include <sys/module.h>
#include <pccard/cardinfo.h>
#include <pccard/driver.h>
#include <pccard/slot.h>
/*
* PC-Card (PCMCIA) specific code.
*/
static int yeinit(struct pccard_devinfo *); /* init device */
static void yeunload(struct pccard_devinfo *); /* Disable driver */
static int yeintr(struct pccard_devinfo *); /* Interrupt handler */
PCCARD_MODULE(fdc, yeinit, yeunload, yeintr, 0, bio_imask);
/*
* this is the secret PIO data port (offset from base)
*/
#define FDC_YE_DATAPORT 6
/*
* Initialize the device - called from Slot manager.
*/
static int yeinit(struct pccard_devinfo *devi)
{
fdc_p fdc = &fdc_data[devi->isahd.id_unit];
fdc->baseport = devi->isahd.id_iobase;
/*
* reset controller
*/
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
/*
* wire into system
*/
if (yeattach(&devi->isahd) == 0)
return(ENXIO);
return(0);
}
/*
* yeunload - unload the driver and clear the table.
* XXX TODO:
* This is usually called when the card is ejected, but
* can be caused by a modunload of a controller driver.
* The idea is to reset the driver's view of the device
* and ensure that any driver entry points such as
* read and write do not hang.
*/
static void yeunload(struct pccard_devinfo *devi)
{
if (fd_data[devi->isahd.id_unit].type == NO_TYPE)
return;
/*
* this prevents Fdopen() and fdstrategy() from attempting
* to access unloaded controller
*/
fd_data[devi->isahd.id_unit].type = NO_TYPE;
printf("fdc%d: unload\n", devi->isahd.id_unit);
}
/*
* yeintr - Shared interrupt called from
* front end of PC-Card handler.
*/
static int yeintr(struct pccard_devinfo *devi)
{
fdintr((fdcu_t)devi->isahd.id_unit);
return(1);
}
#endif /* NCARD > 0 */
#endif /* FDC_YE */
static d_open_t Fdopen; /* NOTE, not fdopen */
static d_close_t fdclose;
static d_ioctl_t fdioctl;
static d_strategy_t fdstrategy;
#define CDEV_MAJOR 9
#define BDEV_MAJOR 2
static struct cdevsw fd_cdevsw = {
/* open */ Fdopen,
/* close */ fdclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ fdioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ fdstrategy,
/* name */ "fd",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK,
/* bmaj */ BDEV_MAJOR
};
static int
fdc_err(struct fdc_data *fdc, const char *s)
{
fdc->fdc_errs++;
if (s) {
if (fdc->fdc_errs < FDC_ERRMAX) {
device_print_prettyname(fdc->fdc_dev);
printf("%s", s);
} else if (fdc->fdc_errs == FDC_ERRMAX) {
device_print_prettyname(fdc->fdc_dev);
printf("too many errors, not logging any more\n");
}
}
return FD_FAILED;
}
/*
* fd_cmd: Send a command to the chip. Takes a varargs with this structure:
* Unit number,
* # of output bytes, output bytes as ints ...,
* # of input bytes, input bytes as ints ...
*/
static int
fd_cmd(struct fdc_data *fdc, int n_out, ...)
{
u_char cmd;
int n_in;
int n;
va_list ap;
va_start(ap, n_out);
cmd = (u_char)(va_arg(ap, int));
va_end(ap);
va_start(ap, n_out);
for (n = 0; n < n_out; n++)
{
if (out_fdc(fdc, va_arg(ap, int)) < 0)
{
char msg[50];
snprintf(msg, sizeof(msg),
"cmd %x failed at out byte %d of %d\n",
cmd, n + 1, n_out);
return fdc_err(fdc, msg);
}
}
n_in = va_arg(ap, int);
for (n = 0; n < n_in; n++)
{
int *ptr = va_arg(ap, int *);
if (fd_in(fdc, ptr) < 0)
{
char msg[50];
snprintf(msg, sizeof(msg),
"cmd %02x failed at in byte %d of %d\n",
cmd, n + 1, n_in);
return fdc_err(fdc, msg);
}
}
return 0;
}
static int
enable_fifo(fdc_p fdc)
{
int i, j;
if ((fdc->flags & FDC_HAS_FIFO) == 0) {
/*
* XXX:
* Cannot use fd_cmd the normal way here, since
* this might be an invalid command. Thus we send the
* first byte, and check for an early turn of data directon.
*/
if (out_fdc(fdc, I8207X_CONFIGURE) < 0)
return fdc_err(fdc, "Enable FIFO failed\n");
/* If command is invalid, return */
j = 100000;
while ((i = fdsts_rd(fdc) & (NE7_DIO | NE7_RQM))
!= NE7_RQM && j-- > 0)
if (i == (NE7_DIO | NE7_RQM)) {
fdc_reset(fdc);
return FD_FAILED;
}
if (j<0 ||
fd_cmd(fdc, 3,
0, (fifo_threshold - 1) & 0xf, 0, 0) < 0) {
fdc_reset(fdc);
return fdc_err(fdc, "Enable FIFO failed\n");
}
fdc->flags |= FDC_HAS_FIFO;
return 0;
}
if (fd_cmd(fdc, 4,
I8207X_CONFIGURE, 0, (fifo_threshold - 1) & 0xf, 0, 0) < 0)
return fdc_err(fdc, "Re-enable FIFO failed\n");
return 0;
}
static int
fd_sense_drive_status(fdc_p fdc, int *st3p)
{
int st3;
if (fd_cmd(fdc, 2, NE7CMD_SENSED, fdc->fdu, 1, &st3))
{
return fdc_err(fdc, "Sense Drive Status failed\n");
}
if (st3p)
*st3p = st3;
return 0;
}
static int
fd_sense_int(fdc_p fdc, int *st0p, int *cylp)
{
int cyl, st0, ret;
ret = fd_cmd(fdc, 1, NE7CMD_SENSEI, 1, &st0);
if (ret) {
(void)fdc_err(fdc,
"sense intr err reading stat reg 0\n");
return ret;
}
if (st0p)
*st0p = st0;
if ((st0 & NE7_ST0_IC) == NE7_ST0_IC_IV) {
/*
* There doesn't seem to have been an interrupt.
*/
return FD_NOT_VALID;
}
if (fd_in(fdc, &cyl) < 0) {
return fdc_err(fdc, "can't get cyl num\n");
}
if (cylp)
*cylp = cyl;
return 0;
}
static int
fd_read_status(fdc_p fdc, int fdsu)
{
int i, ret;
for (i = 0; i < 7; i++) {
/*
* XXX types are poorly chosen. Only bytes can by read
* from the hardware, but fdc->status[] wants u_ints and
* fd_in() gives ints.
*/
int status;
ret = fd_in(fdc, &status);
fdc->status[i] = status;
if (ret != 0)
break;
}
if (ret == 0)
fdc->flags |= FDC_STAT_VALID;
else
fdc->flags &= ~FDC_STAT_VALID;
return ret;
}
/****************************************************************************/
/* autoconfiguration stuff */
/****************************************************************************/
static struct isa_pnp_id fdc_ids[] = {
{0x0007d041, "PC standard floppy disk controller"}, /* PNP0700 */
{0x0107d041, "Standard floppy controller supporting MS Device Bay Spec"}, /* PNP0701 */
{0}
};
/*
* fdc controller section.
*/
static int
fdc_probe(device_t dev)
{
int error, ispnp, ic_type;
struct fdc_data *fdc;
/* Check pnp ids */
error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
if (error == ENXIO)
return ENXIO;
ispnp = (error == 0);
fdc = device_get_softc(dev);
bzero(fdc, sizeof *fdc);
fdc->fdc_dev = dev;
fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ioport, 0ul, ~0ul,
ispnp ? 1 : IO_FDCSIZE,
RF_ACTIVE);
if (fdc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range\n");
error = ENXIO;
goto out;
}
fdc->portt = rman_get_bustag(fdc->res_ioport);
fdc->porth = rman_get_bushandle(fdc->res_ioport);
/*
* Some bios' report the device at 0x3f2-0x3f5,0x3f7 and some at
* 0x3f0-0x3f5,0x3f7. We detect the former by checking the size
* and adjust the port address accordingly.
*
* And some (!!) report 0x3f2-0x3f5 and completely leave out the
* control register! It seems that some non-antique controller chips
* have a different method of programming the transfer speed which
* doesn't require the control register, but it's mighty bogus as the
* chip still responds to the address for the control register.
* This hack is truely evil as we use the 6th port in a 4-port chunk.
*/
/* 0x3f2-0x3f5 */
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4 &&
bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
fdc->port_off = -2;
ispnp = 0; /* hack, don't reserve second port chunk */
}
/* 0x3f0-0x3f5 */
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 6 &&
bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
ispnp = 0; /* hack, don't reserve second port chunk */
}
if (ispnp) {
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
fdc->port_off = -2;
fdc->flags |= FDC_ISPNP;
fdc->rid_ctl = 1;
fdc->res_ctl = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ctl, 0ul, ~0ul,
1, RF_ACTIVE);
if (fdc->res_ctl == 0) {
device_printf(dev, "cannot reserve I/O port range\n");
error = ENXIO;
goto out;
}
fdc->ctlt = rman_get_bustag(fdc->res_ctl);
fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
}
fdc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ,
&fdc->rid_irq, 0ul, ~0ul, 1,
RF_ACTIVE);
if (fdc->res_irq == 0) {
device_printf(dev, "cannot reserve interrupt line\n");
error = ENXIO;
goto out;
}
fdc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ,
&fdc->rid_drq, 0ul, ~0ul, 1,
RF_ACTIVE);
if (fdc->res_drq == 0) {
device_printf(dev, "cannot reserve DMA request line\n");
error = ENXIO;
goto out;
}
fdc->dmachan = fdc->res_drq->r_start;
error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
INTR_TYPE_BIO, fdc_intr, fdc, &fdc->fdc_intr);
/* First - lets reset the floppy controller */
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
/* see if it can handle a command */
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
if (fd_cmd(fdc, 1, NE7CMD_VERSION, 1, &ic_type) == 0) {
ic_type = (u_char)ic_type;
switch (ic_type) {
case 0x80:
device_set_desc(dev, "NEC 765 or clone");
fdc->fdct = FDC_NE765;
break;
case 0x81:
device_set_desc(dev, "Intel 82077 or clone");
fdc->fdct = FDC_I82077;
break;
case 0x90:
device_set_desc(dev, "NEC 72065B or clone");
fdc->fdct = FDC_NE72065;
break;
default:
device_set_desc(dev, "generic floppy controller");
fdc->fdct = FDC_UNKNOWN;
break;
}
}
#ifdef FDC_YE
/*
* don't succeed on probe; wait
* for PCCARD subsystem to do it
*/
if (dev->id_flags & FDC_IS_PCMCIA)
return(0);
#endif
return (0);
out:
if (fdc->fdc_intr)
BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
fdc->fdc_intr);
if (fdc->res_irq != 0) {
bus_deactivate_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
fdc->res_irq);
bus_release_resource(dev, SYS_RES_IRQ, fdc->rid_irq,
fdc->res_irq);
}
if (fdc->res_ctl != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
fdc->res_ctl);
bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ctl,
fdc->res_ctl);
}
if (fdc->res_ioport != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
fdc->res_ioport);
bus_release_resource(dev, SYS_RES_IOPORT, fdc->rid_ioport,
fdc->res_ioport);
}
if (fdc->res_drq != 0) {
bus_deactivate_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
fdc->res_drq);
bus_release_resource(dev, SYS_RES_DRQ, fdc->rid_drq,
fdc->res_drq);
}
return (error);
}
/*
* Aped dfr@freebsd.org's isa_add_device().
*/
static void
fdc_add_device(device_t dev, const char *name, int unit)
{
int disabled, *ivar;
device_t child;
ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT);
if (ivar == 0)
return;
if (resource_int_value(name, unit, "drive", ivar) != 0)
*ivar = 0;
child = device_add_child(dev, name, unit);
device_set_ivars(child, ivar);
if (child == 0)
return;
if (resource_int_value(name, unit, "disabled", &disabled) == 0
&& disabled != 0)
device_disable(child);
}
static int
fdc_attach(device_t dev)
{
struct fdc_data *fdc = device_get_softc(dev);
fdcu_t fdcu = device_get_unit(dev);
int i;
for (i = resource_query_string(-1, "at", device_get_nameunit(dev));
i != -1;
i = resource_query_string(i, "at", device_get_nameunit(dev)))
fdc_add_device(dev, resource_query_name(i),
resource_query_unit(i));
fdc->fdcu = fdcu;
fdc->flags |= FDC_ATTACHED;
/* Acquire the DMA channel forever, The driver will do the rest */
/* XXX should integrate with rman */
isa_dma_acquire(fdc->dmachan);
isa_dmainit(fdc->dmachan, 128 << 3 /* XXX max secsize */);
fdc->state = DEVIDLE;
/* reset controller, turn motor off, clear fdout mirror reg */
fdout_wr(fdc, ((fdc->fdout = 0)));
bufq_init(&fdc->head);
/*
* Probe and attach any children as were configured above.
*/
return (bus_generic_attach(dev));
}
static int
fdc_print_child(device_t me, device_t child)
{
int retval = 0;
retval += bus_print_child_header(me, child);
retval += printf(" on %s drive %d\n", device_get_nameunit(me),
*(int *)device_get_ivars(child));
return (retval);
}
static device_method_t fdc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fdc_probe),
DEVMETHOD(device_attach, fdc_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, fdc_print_child),
/* Our children never use any other bus interface methods. */
{ 0, 0 }
};
static driver_t fdc_driver = {
"fdc",
fdc_methods,
sizeof(struct fdc_data)
};
DRIVER_MODULE(fdc, isa, fdc_driver, fdc_devclass, 0, 0);
/******************************************************************/
/*
* devices attached to the controller section.
*/
static int
fd_probe(device_t dev)
{
int i;
u_int fdt, st0, st3;
struct fd_data *fd;
struct fdc_data *fdc;
fdsu_t fdsu;
static int fd_fifo = 0;
fdsu = *(int *)device_get_ivars(dev); /* xxx cheat a bit... */
fd = device_get_softc(dev);
fdc = device_get_softc(device_get_parent(dev));
bzero(fd, sizeof *fd);
fd->dev = dev;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->fdu = device_get_unit(dev);
#ifdef __i386__
/* look up what bios thinks we have */
switch (fd->fdu) {
case 0:
if (device_get_flags(fdc->fdc_dev) & FDC_PRETEND_D0)
fdt = RTCFDT_144M | RTCFDT_144M_PRETENDED;
else
fdt = (rtcin(RTC_FDISKETTE) & 0xf0);
break;
case 1:
fdt = ((rtcin(RTC_FDISKETTE) << 4) & 0xf0);
break;
default:
fdt = RTCFDT_NONE;
break;
}
#else
fdt = RTCFDT_144M; /* XXX probably */
#endif
/* is there a unit? */
if (fdt == RTCFDT_NONE)
return (ENXIO);
/* select it */
set_motor(fdc, fdsu, TURNON);
DELAY(1000000); /* 1 sec */
/* XXX This doesn't work before the first set_motor() */
if (fd_fifo == 0 && fdc->fdct != FDC_NE765 && fdc->fdct != FDC_UNKNOWN
&& enable_fifo(fdc) == 0) {
device_print_prettyname(device_get_parent(dev));
printf("FIFO enabled, %d bytes threshold\n", fifo_threshold);
}
fd_fifo = 1;
if ((fd_cmd(fdc, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0)
&& (st3 & NE7_ST3_T0)) {
/* if at track 0, first seek inwards */
/* seek some steps: */
fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0);
DELAY(300000); /* ...wait a moment... */
fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
}
/* If we're at track 0 first seek inwards. */
if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
/* Seek some steps... */
if (fd_cmd(fdc, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
/* ...wait a moment... */
DELAY(300000);
/* make ctrlr happy: */
fd_sense_int(fdc, 0, 0);
}
}
for (i = 0; i < 2; i++) {
/*
* we must recalibrate twice, just in case the
* heads have been beyond cylinder 76, since most
* FDCs still barf when attempting to recalibrate
* more than 77 steps
*/
/* go back to 0: */
if (fd_cmd(fdc, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
/* a second being enough for full stroke seek*/
DELAY(i == 0 ? 1000000 : 300000);
/* anything responding? */
if (fd_sense_int(fdc, &st0, 0) == 0 &&
(st0 & NE7_ST0_EC) == 0)
break; /* already probed succesfully */
}
}
set_motor(fdc, fdsu, TURNOFF);
if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
return (ENXIO);
fd->track = FD_NO_TRACK;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
callout_handle_init(&fd->toffhandle);
callout_handle_init(&fd->tohandle);
switch (fdt) {
case RTCFDT_12M:
device_set_desc(dev, "1200-KB 5.25\" drive");
fd->type = FD_1200;
break;
case RTCFDT_144M | RTCFDT_144M_PRETENDED:
device_set_desc(dev, "config-pretended 1440-MB 3.5\" drive");
fdt = RTCFDT_144M;
fd->type = FD_1440;
case RTCFDT_144M:
device_set_desc(dev, "1440-KB 3.5\" drive");
fd->type = FD_1440;
break;
case RTCFDT_288M:
case RTCFDT_288M_1:
device_set_desc(dev, "2880-KB 3.5\" drive (in 1440-KB mode)");
fd->type = FD_1440;
break;
case RTCFDT_360K:
device_set_desc(dev, "360-KB 5.25\" drive");
fd->type = FD_360;
break;
case RTCFDT_720K:
printf("720-KB 3.5\" drive");
fd->type = FD_720;
break;
default:
return (ENXIO);
}
return (0);
}
static int
fd_attach(device_t dev)
{
struct fd_data *fd;
#if 0
int i;
int mynor;
int typemynor;
int typesize;
#endif
fd = device_get_softc(dev);
cdevsw_add(&fd_cdevsw); /* XXX */
make_dev(&fd_cdevsw, (fd->fdu << 6),
UID_ROOT, GID_OPERATOR, 0640, "rfd%d", fd->fdu);
#if 0
/* Other make_dev() go here. */
#endif
/*
* Export the drive to the devstat interface.
*/
devstat_add_entry(&fd->device_stats, device_get_name(dev),
device_get_unit(dev), 512, DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_FD);
return (0);
}
static device_method_t fd_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fd_probe),
DEVMETHOD(device_attach, fd_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend), /* XXX */
DEVMETHOD(device_resume, bus_generic_resume), /* XXX */
{ 0, 0 }
};
static driver_t fd_driver = {
"fd",
fd_methods,
sizeof(struct fd_data)
};
DRIVER_MODULE(fd, fdc, fd_driver, fd_devclass, 0, 0);
/******************************************************************/
#ifdef FDC_YE
/*
* this is a subset of fdattach() optimized for the Y-E Data
* PCMCIA floppy drive.
*/
static int yeattach(struct isa_device *dev)
{
fdcu_t fdcu = dev->id_unit;
fdc_p fdc = fdc_data + fdcu;
fdsu_t fdsu = 0; /* assume 1 drive per YE controller */
fdu_t fdu;
fd_p fd;
int st0, st3, i;
fdc->fdcu = fdcu;
/*
* the FDC_PCMCIA flag is used to to indicate special PIO is used
* instead of DMA
*/
fdc->flags = FDC_ATTACHED|FDC_PCMCIA;
fdc->state = DEVIDLE;
/* reset controller, turn motor off, clear fdout mirror reg */
fdout_wr(fdc, ((fdc->fdout = 0)));
bufq_init(&fdc->head);
/*
* assume 2 drives/ "normal" controller
*/
fdu = fdcu * 2;
if (fdu >= NFD) {
printf("fdu %d >= NFD\n",fdu);
return(0);
};
fd = &fd_data[fdu];
set_motor(fdcu, fdsu, TURNON);
DELAY(1000000); /* 1 sec */
fdc->fdct = FDC_NE765;
if ((fd_cmd(fdcu, 2, NE7CMD_SENSED, fdsu, 1, &st3) == 0) &&
(st3 & NE7_ST3_T0)) {
/* if at track 0, first seek inwards */
/* seek some steps: */
(void)fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0);
DELAY(300000); /* ...wait a moment... */
(void)fd_sense_int(fdc, 0, 0); /* make ctrlr happy */
}
/* If we're at track 0 first seek inwards. */
if ((fd_sense_drive_status(fdc, &st3) == 0) && (st3 & NE7_ST3_T0)) {
/* Seek some steps... */
if (fd_cmd(fdcu, 3, NE7CMD_SEEK, fdsu, 10, 0) == 0) {
/* ...wait a moment... */
DELAY(300000);
/* make ctrlr happy: */
(void)fd_sense_int(fdc, 0, 0);
}
}
for(i = 0; i < 2; i++) {
/*
* we must recalibrate twice, just in case the
* heads have been beyond cylinder 76, since most
* FDCs still barf when attempting to recalibrate
* more than 77 steps
*/
/* go back to 0: */
if (fd_cmd(fdcu, 2, NE7CMD_RECAL, fdsu, 0) == 0) {
/* a second being enough for full stroke seek*/
DELAY(i == 0? 1000000: 300000);
/* anything responding? */
if (fd_sense_int(fdc, &st0, 0) == 0 &&
(st0 & NE7_ST0_EC) == 0)
break; /* already probed succesfully */
}
}
set_motor(fdcu, fdsu, TURNOFF);
if (st0 & NE7_ST0_EC) /* no track 0 -> no drive present */
return(0);
fd->track = FD_NO_TRACK;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
printf("fdc%d: 1.44MB 3.5in PCMCIA\n", fdcu);
fd->type = FD_1440;
return (1);
}
#endif
/****************************************************************************/
/* motor control stuff */
/* remember to not deselect the drive we're working on */
/****************************************************************************/
static void
set_motor(struct fdc_data *fdc, int fdsu, int turnon)
{
int fdout = fdc->fdout;
int needspecify = 0;
if(turnon) {
fdout &= ~FDO_FDSEL;
fdout |= (FDO_MOEN0 << fdsu) + fdsu;
} else
fdout &= ~(FDO_MOEN0 << fdsu);
if(!turnon
&& (fdout & (FDO_MOEN0+FDO_MOEN1+FDO_MOEN2+FDO_MOEN3)) == 0)
/* gonna turn off the last drive, put FDC to bed */
fdout &= ~ (FDO_FRST|FDO_FDMAEN);
else {
/* make sure controller is selected and specified */
if((fdout & (FDO_FRST|FDO_FDMAEN)) == 0)
needspecify = 1;
fdout |= (FDO_FRST|FDO_FDMAEN);
}
fdout_wr(fdc, fdout);
fdc->fdout = fdout;
TRACE1("[0x%x->FDOUT]", fdout);
if (needspecify) {
/*
* XXX
* special case: since we have just woken up the FDC
* from its sleep, we silently assume the command will
* be accepted, and do not test for a timeout
*/
(void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
if (fdc->flags & FDC_HAS_FIFO)
(void) enable_fifo(fdc);
}
}
static void
fd_turnoff(void *xfd)
{
int s;
fd_p fd = xfd;
TRACE1("[fd%d: turnoff]", fd->fdu);
/*
* Don't turn off the motor yet if the drive is active.
* XXX shouldn't even schedule turnoff until drive is inactive
* and nothing is queued on it.
*/
if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
return;
}
s = splbio();
fd->flags &= ~FD_MOTOR;
set_motor(fd->fdc, fd->fdsu, TURNOFF);
splx(s);
}
static void
fd_motor_on(void *xfd)
{
int s;
fd_p fd = xfd;
s = splbio();
fd->flags &= ~FD_MOTOR_WAIT;
if((fd->fdc->fd == fd) && (fd->fdc->state == MOTORWAIT))
{
fdc_intr(fd->fdc);
}
splx(s);
}
static void
fd_turnon(fd_p fd)
{
if(!(fd->flags & FD_MOTOR))
{
fd->flags |= (FD_MOTOR + FD_MOTOR_WAIT);
set_motor(fd->fdc, fd->fdsu, TURNON);
timeout(fd_motor_on, fd, hz); /* in 1 sec its ok */
}
}
static void
fdc_reset(fdc_p fdc)
{
/* Try a reset, keep motor on */
fdout_wr(fdc, fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~(FDO_FRST|FDO_FDMAEN));
DELAY(100);
/* enable FDC, but defer interrupts a moment */
fdout_wr(fdc, fdc->fdout & ~FDO_FDMAEN);
TRACE1("[0x%x->FDOUT]", fdc->fdout & ~FDO_FDMAEN);
DELAY(100);
fdout_wr(fdc, fdc->fdout);
TRACE1("[0x%x->FDOUT]", fdc->fdout);
/* XXX after a reset, silently believe the FDC will accept commands */
(void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
if (fdc->flags & FDC_HAS_FIFO)
(void) enable_fifo(fdc);
}
/****************************************************************************/
/* fdc in/out */
/****************************************************************************/
int
in_fdc(struct fdc_data *fdc)
{
int i, j = 100000;
while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM))
!= (NE7_DIO|NE7_RQM) && j-- > 0)
if (i == NE7_RQM)
return fdc_err(fdc, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = fddata_rd(fdc);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
return(i);
#else /* !FDC_DEBUG */
return fddata_rd(fdc);
#endif /* FDC_DEBUG */
}
/*
* fd_in: Like in_fdc, but allows you to see if it worked.
*/
static int
fd_in(struct fdc_data *fdc, int *ptr)
{
int i, j = 100000;
while ((i = fdsts_rd(fdc) & (NE7_DIO|NE7_RQM))
!= (NE7_DIO|NE7_RQM) && j-- > 0)
if (i == NE7_RQM)
return fdc_err(fdc, "ready for output in input\n");
if (j <= 0)
return fdc_err(fdc, bootverbose? "input ready timeout\n": 0);
#ifdef FDC_DEBUG
i = fddata_rd(fdc);
TRACE1("[FDDATA->0x%x]", (unsigned char)i);
*ptr = i;
return 0;
#else /* !FDC_DEBUG */
i = fddata_rd(fdc);
if (ptr)
*ptr = i;
return 0;
#endif /* FDC_DEBUG */
}
int
out_fdc(struct fdc_data *fdc, int x)
{
int i;
/* Check that the direction bit is set */
i = 100000;
while ((fdsts_rd(fdc) & NE7_DIO) && i-- > 0);
if (i <= 0) return fdc_err(fdc, "direction bit not set\n");
/* Check that the floppy controller is ready for a command */
i = 100000;
while ((fdsts_rd(fdc) & NE7_RQM) == 0 && i-- > 0);
if (i <= 0)
return fdc_err(fdc, bootverbose? "output ready timeout\n": 0);
/* Send the command and return */
fddata_wr(fdc, x);
TRACE1("[0x%x->FDDATA]", x);
return (0);
}
/****************************************************************************/
/* fdopen/fdclose */
/****************************************************************************/
int
Fdopen(dev_t dev, int flags, int mode, struct proc *p)
{
fdu_t fdu = FDUNIT(minor(dev));
int type = FDTYPE(minor(dev));
fd_p fd;
fdc_p fdc;
/* check bounds */
if ((fd = devclass_get_softc(fd_devclass, fdu)) == 0)
return (ENXIO);
fdc = fd->fdc;
if ((fdc == NULL) || (fd->type == NO_TYPE))
return (ENXIO);
if (type > NUMDENS)
return (ENXIO);
if (type == 0)
type = fd->type;
else {
/*
* For each type of basic drive, make sure we are trying
* to open a type it can do,
*/
if (type != fd->type) {
switch (fd->type) {
case FD_360:
return (ENXIO);
case FD_720:
if ( type != FD_820
&& type != FD_800
)
return (ENXIO);
break;
case FD_1200:
switch (type) {
case FD_1480:
type = FD_1480in5_25;
break;
case FD_1440:
type = FD_1440in5_25;
break;
case FD_820:
type = FD_820in5_25;
break;
case FD_800:
type = FD_800in5_25;
break;
case FD_720:
type = FD_720in5_25;
break;
case FD_360:
type = FD_360in5_25;
break;
default:
return(ENXIO);
}
break;
case FD_1440:
if ( type != FD_1720
&& type != FD_1480
&& type != FD_1200
&& type != FD_820
&& type != FD_800
&& type != FD_720
)
return(ENXIO);
break;
}
}
}
fd->ft = fd_types + type - 1;
fd->flags |= FD_OPEN;
device_busy(fd->dev);
device_busy(fd->fdc->fdc_dev);
return 0;
}
int
fdclose(dev_t dev, int flags, int mode, struct proc *p)
{
fdu_t fdu = FDUNIT(minor(dev));
struct fd_data *fd;
fd = devclass_get_softc(fd_devclass, fdu);
fd->flags &= ~FD_OPEN;
fd->options &= ~FDOPT_NORETRY;
return (0);
}
/****************************************************************************/
/* fdstrategy */
/****************************************************************************/
void
fdstrategy(struct buf *bp)
{
unsigned nblocks, blknum, cando;
int s;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
fdu = FDUNIT(minor(bp->b_dev));
fd = devclass_get_softc(fd_devclass, fdu);
if (fd == 0)
panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
(u_long)major(bp->b_dev), (u_long)minor(bp->b_dev));
fdc = fd->fdc;
#ifdef FDC_YE
if (fd->type == NO_TYPE) {
bp->b_error = ENXIO;
bp->b_flags |= B_ERROR;
/*
* I _refuse_ to use a goto
*/
biodone(bp);
return;
};
#endif
fdblk = 128 << (fd->ft->secsize);
if (!(bp->b_flags & B_FORMAT)) {
if (bp->b_blkno < 0) {
printf(
"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
fdu, (u_long)bp->b_blkno, bp->b_bcount);
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
if ((bp->b_bcount % fdblk) != 0) {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
}
/*
* Set up block calculations.
*/
if (bp->b_blkno > 20000000) {
/*
* Reject unreasonably high block number, prevent the
* multiplication below from overflowing.
*/
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
blknum = (unsigned) bp->b_blkno * DEV_BSIZE/fdblk;
nblocks = fd->ft->size;
bp->b_resid = 0;
if (blknum + (bp->b_bcount / fdblk) > nblocks) {
if (blknum <= nblocks) {
cando = (nblocks - blknum) * fdblk;
bp->b_resid = bp->b_bcount - cando;
if (cando == 0)
goto bad; /* not actually bad but EOF */
} else {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
}
bp->b_pblkno = bp->b_blkno;
s = splbio();
bufqdisksort(&fdc->head, bp);
untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
/* Tell devstat we are starting on the transaction */
devstat_start_transaction(&fd->device_stats);
fdstart(fdc);
splx(s);
return;
bad:
biodone(bp);
}
/***************************************************************\
* fdstart *
* We have just queued something.. if the controller is not busy *
* then simulate the case where it has just finished a command *
* So that it (the interrupt routine) looks on the queue for more*
* work to do and picks up what we just added. *
* If the controller is already busy, we need do nothing, as it *
* will pick up our work when the present work completes *
\***************************************************************/
static void
fdstart(struct fdc_data *fdc)
{
int s;
s = splbio();
if(fdc->state == DEVIDLE)
{
fdc_intr(fdc);
}
splx(s);
}
static void
fd_iotimeout(void *xfdc)
{
fdc_p fdc;
int s;
fdc = xfdc;
TRACE1("fd%d[fd_iotimeout()]", fdc->fdu);
/*
* Due to IBM's brain-dead design, the FDC has a faked ready
* signal, hardwired to ready == true. Thus, any command
* issued if there's no diskette in the drive will _never_
* complete, and must be aborted by resetting the FDC.
* Many thanks, Big Blue!
* The FDC must not be reset directly, since that would
* interfere with the state machine. Instead, pretend that
* the command completed but was invalid. The state machine
* will reset the FDC and retry once.
*/
s = splbio();
fdc->status[0] = NE7_ST0_IC_IV;
fdc->flags &= ~FDC_STAT_VALID;
fdc->state = IOTIMEDOUT;
fdc_intr(fdc);
splx(s);
}
/* just ensure it has the right spl */
static void
fd_pseudointr(void *xfdc)
{
int s;
s = splbio();
fdc_intr(xfdc);
splx(s);
}
/***********************************************************************\
* fdintr *
* keep calling the state machine until it returns a 0 *
* ALWAYS called at SPLBIO *
\***********************************************************************/
static void
fdc_intr(void *xfdc)
{
fdc_p fdc = xfdc;
while(fdstate(fdc))
;
}
#ifdef FDC_YE
/*
* magic pseudo-DMA initialization for YE FDC. Sets count and
* direction
*/
#define SET_BCDR(wr,cnt,port) outb(port,(((cnt)-1) & 0xff)); \
outb(port+1,((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)))
/*
* fdcpio(): perform programmed IO read/write for YE PCMCIA floppy
*/
static int fdcpio(fdcu_t fdcu, long flags, caddr_t addr, u_int count)
{
u_char *cptr = (u_char *)addr;
fdc_p fdc = &fdc_data[fdcu];
int io = fdc->baseport;
if (flags & B_READ) {
if (fdc->state != PIOREAD) {
fdc->state = PIOREAD;
return(0);
};
SET_BCDR(0,count,io);
insb(io+FDC_YE_DATAPORT,cptr,count);
} else {
outsb(io+FDC_YE_DATAPORT,cptr,count);
SET_BCDR(0,count,io);
};
return(1);
}
#endif /* FDC_YE */
/***********************************************************************\
* The controller state machine. *
* if it returns a non zero value, it should be called again immediatly *
\***********************************************************************/
static int
fdstate(fdc_p fdc)
{
int read, format, head, i, sec = 0, sectrac, st0, cyl, st3;
unsigned blknum = 0, b_cylinder = 0;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct buf *bp;
struct fd_formb *finfo = NULL;
size_t fdblk;
bp = fdc->bp;
if (bp == NULL) {
bp = bufq_first(&fdc->head);
if (bp != NULL) {
bufq_remove(&fdc->head, bp);
fdc->bp = bp;
}
}
if (bp == NULL) {
/***********************************************\
* nothing left for this controller to do *
* Force into the IDLE state, *
\***********************************************/
fdc->state = DEVIDLE;
if (fdc->fd) {
device_print_prettyname(fdc->fdc_dev);
printf("unexpected valid fd pointer\n");
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
}
TRACE1("[fdc%d IDLE]", fdc->fdcu);
return (0);
}
fdu = FDUNIT(minor(bp->b_dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
if (fdc->fd && (fd != fdc->fd)) {
device_print_prettyname(fd->dev);
printf("confused fd pointers\n");
}
read = bp->b_flags & B_READ;
format = bp->b_flags & B_FORMAT;
if (format) {
finfo = (struct fd_formb *)bp->b_data;
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
}
if (fdc->state == DOSEEK || fdc->state == SEEKCOMPLETE) {
blknum = (unsigned) bp->b_pblkno * DEV_BSIZE/fdblk +
fd->skip/fdblk;
b_cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
}
TRACE1("fd%d", fdu);
TRACE1("[%s]", fdstates[fdc->state]);
TRACE1("(0x%x)", fd->flags);
untimeout(fd_turnoff, fd, fd->toffhandle);
fd->toffhandle = timeout(fd_turnoff, fd, 4 * hz);
switch (fdc->state)
{
case DEVIDLE:
case FINDWORK: /* we have found new work */
fdc->retry = 0;
fd->skip = 0;
fdc->fd = fd;
fdc->fdu = fdu;
fdctl_wr(fdc, fd->ft->trans);
TRACE1("[0x%x->FDCTL]", fd->ft->trans);
/*******************************************************\
* If the next drive has a motor startup pending, then *
* it will start up in its own good time *
\*******************************************************/
if(fd->flags & FD_MOTOR_WAIT) {
fdc->state = MOTORWAIT;
return (0); /* come back later */
}
/*******************************************************\
* Maybe if it's not starting, it SHOULD be starting *
\*******************************************************/
if (!(fd->flags & FD_MOTOR))
{
fdc->state = MOTORWAIT;
fd_turnon(fd);
return (0);
}
else /* at least make sure we are selected */
{
set_motor(fdc, fd->fdsu, TURNON);
}
if (fdc->flags & FDC_NEEDS_RESET) {
fdc->state = RESETCTLR;
fdc->flags &= ~FDC_NEEDS_RESET;
} else
fdc->state = DOSEEK;
break;
case DOSEEK:
if (b_cylinder == (unsigned)fd->track)
{
fdc->state = SEEKCOMPLETE;
break;
}
if (fd_cmd(fdc, 3, NE7CMD_SEEK,
fd->fdsu, b_cylinder * fd->ft->steptrac,
0))
{
/*
* seek command not accepted, looks like
* the FDC went off to the Saints...
*/
fdc->retry = 6; /* try a reset */
return(retrier(fdc));
}
fd->track = FD_NO_TRACK;
fdc->state = SEEKWAIT;
return(0); /* will return later */
case SEEKWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, fdc, hz / 16);
fdc->state = SEEKCOMPLETE;
return(0); /* will return later */
case SEEKCOMPLETE : /* SEEK DONE, START DMA */
/* Make sure seek really happened*/
if(fd->track == FD_NO_TRACK) {
int descyl = b_cylinder * fd->ft->steptrac;
do {
/*
* This might be a "ready changed" interrupt,
* which cannot really happen since the
* RDY pin is hardwired to + 5 volts. This
* generally indicates a "bouncing" intr
* line, so do one of the following:
*
* When running on an enhanced FDC that is
* known to not go stuck after responding
* with INVALID, fetch all interrupt states
* until seeing either an INVALID or a
* real interrupt condition.
*
* When running on a dumb old NE765, give
* up immediately. The controller will
* provide up to four dummy RC interrupt
* conditions right after reset (for the
* corresponding four drives), so this is
* our only chance to get notice that it
* was not the FDC that caused the interrupt.
*/
if (fd_sense_int(fdc, &st0, &cyl)
== FD_NOT_VALID)
return 0;
if(fdc->fdct == FDC_NE765
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
return 0; /* hope for a real intr */
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if (0 == descyl) {
int failed = 0;
/*
* seek to cyl 0 requested; make sure we are
* really there
*/
if (fd_sense_drive_status(fdc, &st3))
failed = 1;
if ((st3 & NE7_ST3_T0) == 0) {
printf(
"fd%d: Seek to cyl 0, but not really there (ST3 = %b)\n",
fdu, st3, NE7_ST3BITS);
failed = 1;
}
if (failed) {
if(fdc->retry < 3)
fdc->retry = 3;
return (retrier(fdc));
}
}
if (cyl != descyl) {
printf(
"fd%d: Seek to cyl %d failed; am at cyl %d (ST0 = 0x%x)\n",
fdu, descyl, cyl, st0);
if (fdc->retry < 3)
fdc->retry = 3;
return (retrier(fdc));
}
}
fd->track = b_cylinder;
#ifdef FDC_YE
if (!(fdc->flags & FDC_PCMCIA))
#endif
isa_dmastart(bp->b_flags, bp->b_data+fd->skip,
format ? bp->b_bcount : fdblk, fdc->dmachan);
sectrac = fd->ft->sectrac;
sec = blknum % (sectrac * fd->ft->heads);
head = sec / sectrac;
sec = sec % sectrac + 1;
fd->hddrv = ((head&1)<<2)+fdu;
if(format || !read)
{
/* make sure the drive is writable */
if(fd_sense_drive_status(fdc, &st3) != 0)
{
/* stuck controller? */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6; /* reset the beast */
return (retrier(fdc));
}
if(st3 & NE7_ST3_WP)
{
/*
* XXX YES! this is ugly.
* in order to force the current operation
* to fail, we will have to fake an FDC
* error - all error handling is done
* by the retrier()
*/
fdc->status[0] = NE7_ST0_IC_AT;
fdc->status[1] = NE7_ST1_NW;
fdc->status[2] = 0;
fdc->status[3] = fd->track;
fdc->status[4] = head;
fdc->status[5] = sec;
fdc->retry = 8; /* break out immediately */
fdc->state = IOTIMEDOUT; /* not really... */
return (1);
}
}
if (format) {
#ifdef FDC_YE
if (fdc->flags & FDC_PCMCIA)
(void)fdcpio(fdcu,bp->b_flags,
bp->b_data+fd->skip,
bp->b_bcount);
#endif
/* formatting */
if(fd_cmd(fdc, 6, NE7CMD_FORMAT, head << 2 | fdu,
finfo->fd_formb_secshift,
finfo->fd_formb_nsecs,
finfo->fd_formb_gaplen,
finfo->fd_formb_fillbyte, 0)) {
/* controller fell over */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
} else {
#ifdef FDC_YE
if (fdc->flags & FDC_PCMCIA) {
/*
* this seems to be necessary even when
* reading data
*/
SET_BCDR(1,fdblk,fdc->baseport);
/*
* perform the write pseudo-DMA before
* the WRITE command is sent
*/
if (!read)
(void)fdcpio(fdcu,bp->b_flags,
bp->b_data+fd->skip,
fdblk);
}
#endif
if (fd_cmd(fdc, 9,
(read ? NE7CMD_READ : NE7CMD_WRITE),
head << 2 | fdu, /* head & unit */
fd->track, /* track */
head,
sec, /* sector + 1 */
fd->ft->secsize, /* sector size */
sectrac, /* sectors/track */
fd->ft->gap, /* gap size */
fd->ft->datalen, /* data length */
0)) {
/* the beast is sleeping again */
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
}
#ifdef FDC_YE
if (fdc->flags & FDC_PCMCIA)
/*
* if this is a read, then simply await interrupt
* before performing PIO
*/
if (read && !fdcpio(fdcu,bp->b_flags,
bp->b_data+fd->skip,fdblk)) {
fd->tohandle = timeout(fd_iotimeout,
(caddr_t)fdcu, hz);
return(0); /* will return later */
};
/*
* write (or format) operation will fall through and
* await completion interrupt
*/
#endif
fdc->state = IOCOMPLETE;
fd->tohandle = timeout(fd_iotimeout, fdc, hz);
return (0); /* will return later */
#ifdef FDC_YE
case PIOREAD:
/*
* actually perform the PIO read. The IOCOMPLETE case
* removes the timeout for us.
*/
(void)fdcpio(fdcu,bp->b_flags,bp->b_data+fd->skip,fdblk);
fdc->state = IOCOMPLETE;
/* FALLTHROUGH */
#endif
case IOCOMPLETE: /* IO DONE, post-analyze */
untimeout(fd_iotimeout, fdc, fd->tohandle);
if (fd_read_status(fdc, fd->fdsu)) {
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk,
fdc->dmachan);
if (fdc->retry < 6)
fdc->retry = 6; /* force a reset */
return (retrier(fdc));
}
fdc->state = IOTIMEDOUT;
/* FALLTHROUGH */
case IOTIMEDOUT:
#ifdef FDC_YE
if (!(fdc->flags & FDC_PCMCIA))
#endif
isa_dmadone(bp->b_flags, bp->b_data + fd->skip,
format ? bp->b_bcount : fdblk, fdc->dmachan);
if (fdc->status[0] & NE7_ST0_IC) {
if ((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
&& fdc->status[1] & NE7_ST1_OR) {
/*
* DMA overrun. Someone hogged the bus
* and didn't release it in time for the
* next FDC transfer.
* Just restart it, don't increment retry
* count. (vak)
*/
fdc->state = SEEKCOMPLETE;
return (1);
}
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_IV
&& fdc->retry < 6)
fdc->retry = 6; /* force a reset */
else if((fdc->status[0] & NE7_ST0_IC) == NE7_ST0_IC_AT
&& fdc->status[2] & NE7_ST2_WC
&& fdc->retry < 3)
fdc->retry = 3; /* force recalibrate */
return (retrier(fdc));
}
/* All OK */
fd->skip += fdblk;
if (!format && fd->skip < bp->b_bcount - bp->b_resid) {
/* set up next transfer */
fdc->state = DOSEEK;
} else {
/* ALL DONE */
fd->skip = 0;
fdc->bp = NULL;
devstat_end_transaction_buf(&fd->device_stats, bp);
biodone(bp);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return (1);
case RESETCTLR:
fdc_reset(fdc);
fdc->retry++;
fdc->state = RESETCOMPLETE;
return (0);
case RESETCOMPLETE:
/*
* Discard all the results from the reset so that they
* can't cause an unexpected interrupt later.
*/
for (i = 0; i < 4; i++)
(void)fd_sense_int(fdc, &st0, &cyl);
fdc->state = STARTRECAL;
/* Fall through. */
case STARTRECAL:
if(fd_cmd(fdc, 2, NE7CMD_RECAL, fdu, 0)) {
/* arrgl */
fdc->retry = 6;
return (retrier(fdc));
}
fdc->state = RECALWAIT;
return (0); /* will return later */
case RECALWAIT:
/* allow heads to settle */
timeout(fd_pseudointr, fdc, hz / 8);
fdc->state = RECALCOMPLETE;
return (0); /* will return later */
case RECALCOMPLETE:
do {
/*
* See SEEKCOMPLETE for a comment on this:
*/
if (fd_sense_int(fdc, &st0, &cyl) == FD_NOT_VALID)
return 0;
if(fdc->fdct == FDC_NE765
&& (st0 & NE7_ST0_IC) == NE7_ST0_IC_RC)
return 0; /* hope for a real intr */
} while ((st0 & NE7_ST0_IC) == NE7_ST0_IC_RC);
if ((st0 & NE7_ST0_IC) != NE7_ST0_IC_NT || cyl != 0)
{
if(fdc->retry > 3)
/*
* a recalibrate from beyond cylinder 77
* will "fail" due to the FDC limitations;
* since people used to complain much about
* the failure message, try not logging
* this one if it seems to be the first
* time in a line
*/
printf("fd%d: recal failed ST0 %b cyl %d\n",
fdu, st0, NE7_ST0BITS, cyl);
if(fdc->retry < 3) fdc->retry = 3;
return (retrier(fdc));
}
fd->track = 0;
/* Seek (probably) necessary */
fdc->state = DOSEEK;
return (1); /* will return immediatly */
case MOTORWAIT:
if(fd->flags & FD_MOTOR_WAIT)
{
return (0); /* time's not up yet */
}
if (fdc->flags & FDC_NEEDS_RESET) {
fdc->state = RESETCTLR;
fdc->flags &= ~FDC_NEEDS_RESET;
} else {
/*
* If all motors were off, then the controller was
* reset, so it has lost track of the current
* cylinder. Recalibrate to handle this case.
* But first, discard the results of the reset.
*/
fdc->state = RESETCOMPLETE;
}
return (1); /* will return immediatly */
default:
device_print_prettyname(fdc->fdc_dev);
printf("unexpected FD int->");
if (fd_read_status(fdc, fd->fdsu) == 0)
printf("FDC status :%x %x %x %x %x %x %x ",
fdc->status[0],
fdc->status[1],
fdc->status[2],
fdc->status[3],
fdc->status[4],
fdc->status[5],
fdc->status[6] );
else
printf("No status available ");
if (fd_sense_int(fdc, &st0, &cyl) != 0)
{
printf("[controller is dead now]\n");
return (0);
}
printf("ST0 = %x, PCN = %x\n", st0, cyl);
return (0);
}
/*XXX confusing: some branches return immediately, others end up here*/
return (1); /* Come back immediatly to new state */
}
static int
retrier(struct fdc_data *fdc)
{
register struct buf *bp;
struct fd_data *fd;
int fdu;
bp = fdc->bp;
/* XXX shouldn't this be cached somewhere? */
fdu = FDUNIT(minor(bp->b_dev));
fd = devclass_get_softc(fd_devclass, fdu);
if (fd->options & FDOPT_NORETRY)
goto fail;
switch (fdc->retry) {
case 0: case 1: case 2:
fdc->state = SEEKCOMPLETE;
break;
case 3: case 4: case 5:
fdc->state = STARTRECAL;
break;
case 6:
fdc->state = RESETCTLR;
break;
case 7:
break;
default:
fail:
{
dev_t sav_b_dev = bp->b_dev;
/* Trick diskerr */
bp->b_dev = makedev(major(bp->b_dev),
(FDUNIT(minor(bp->b_dev))<<3)|RAW_PART);
diskerr(bp, "hard error", LOG_PRINTF,
fdc->fd->skip / DEV_BSIZE,
(struct disklabel *)NULL);
bp->b_dev = sav_b_dev;
if (fdc->flags & FDC_STAT_VALID)
{
printf(
" (ST0 %b ST1 %b ST2 %b cyl %u hd %u sec %u)\n",
fdc->status[0], NE7_ST0BITS,
fdc->status[1], NE7_ST1BITS,
fdc->status[2], NE7_ST2BITS,
fdc->status[3], fdc->status[4],
fdc->status[5]);
}
else
printf(" (No status)\n");
}
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
bp->b_resid += bp->b_bcount - fdc->fd->skip;
fdc->bp = NULL;
fdc->fd->skip = 0;
devstat_end_transaction_buf(&fdc->fd->device_stats, bp);
biodone(bp);
fdc->state = FINDWORK;
fdc->flags |= FDC_NEEDS_RESET;
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
return (1);
}
fdc->retry++;
return (1);
}
static int
fdformat(dev, finfo, p)
dev_t dev;
struct fd_formb *finfo;
struct proc *p;
{
fdu_t fdu;
fd_p fd;
struct buf *bp;
int rv = 0, s;
size_t fdblk;
fdu = FDUNIT(minor(dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
/* set up a buffer header for fdstrategy() */
bp = (struct buf *)malloc(sizeof(struct buf), M_TEMP, M_NOWAIT);
if(bp == 0)
return ENOBUFS;
/*
* keep the process from being swapped
*/
PHOLD(p);
bzero((void *)bp, sizeof(struct buf));
BUF_LOCKINIT(bp);
BUF_LOCK(bp, LK_EXCLUSIVE);
bp->b_flags = B_PHYS | B_FORMAT;
/*
* calculate a fake blkno, so fdstrategy() would initiate a
* seek to the requested cylinder
*/
bp->b_blkno = (finfo->cyl * (fd->ft->sectrac * fd->ft->heads)
+ finfo->head * fd->ft->sectrac) * fdblk / DEV_BSIZE;
bp->b_bcount = sizeof(struct fd_idfield_data) * finfo->fd_formb_nsecs;
bp->b_data = (caddr_t)finfo;
/* now do the format */
bp->b_dev = dev;
BUF_STRATEGY(bp, 0);
/* ...and wait for it to complete */
s = splbio();
while(!(bp->b_flags & B_DONE)) {
rv = tsleep((caddr_t)bp, PRIBIO, "fdform", 20 * hz);
if (rv == EWOULDBLOCK)
break;
}
splx(s);
if (rv == EWOULDBLOCK) {
/* timed out */
rv = EIO;
biodone(bp);
}
if (bp->b_flags & B_ERROR)
rv = bp->b_error;
/*
* allow the process to be swapped
*/
PRELE(p);
BUF_UNLOCK(bp);
BUF_LOCKFREE(bp);
free(bp, M_TEMP);
return rv;
}
/*
* TODO: don't allocate buffer on stack.
*/
static int
fdioctl(dev, cmd, addr, flag, p)
dev_t dev;
u_long cmd;
caddr_t addr;
int flag;
struct proc *p;
{
fdu_t fdu = FDUNIT(minor(dev));
fd_p fd = devclass_get_softc(fd_devclass, fdu);
size_t fdblk;
struct fd_type *fdt;
struct disklabel *dl;
char buffer[DEV_BSIZE];
int error = 0;
fdblk = 128 << fd->ft->secsize;
switch (cmd) {
case DIOCGDINFO:
bzero(buffer, sizeof (buffer));
dl = (struct disklabel *)buffer;
dl->d_secsize = fdblk;
fdt = fd->ft;
dl->d_secpercyl = fdt->size / fdt->tracks;
dl->d_type = DTYPE_FLOPPY;
if (readdisklabel(dkmodpart(dev, RAW_PART), dl)
== NULL)
error = 0;
else
error = EINVAL;
*(struct disklabel *)addr = *dl;
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
error = EBADF;
break;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
error = EBADF;
break;
case DIOCWDINFO:
if ((flag & FWRITE) == 0) {
error = EBADF;
break;
}
dl = (struct disklabel *)addr;
if ((error = setdisklabel((struct disklabel *)buffer, dl,
(u_long)0)) != 0)
break;
error = writedisklabel(dev, (struct disklabel *)buffer);
break;
case FD_FORM:
if ((flag & FWRITE) == 0)
error = EBADF; /* must be opened for writing */
else if (((struct fd_formb *)addr)->format_version !=
FD_FORMAT_VERSION)
error = EINVAL; /* wrong version of formatting prog */
else
error = fdformat(dev, (struct fd_formb *)addr, p);
break;
case FD_GTYPE: /* get drive type */
*(struct fd_type *)addr = *fd->ft;
break;
case FD_STYPE: /* set drive type */
/* this is considered harmful; only allow for superuser */
if (suser(p) != 0)
return EPERM;
*fd->ft = *(struct fd_type *)addr;
break;
case FD_GOPTS: /* get drive options */
*(int *)addr = fd->options;
break;
case FD_SOPTS: /* set drive options */
fd->options = *(int *)addr;
break;
default:
error = ENOTTY;
break;
}
return (error);
}
/*
* Hello emacs, these are the
* Local Variables:
* c-indent-level: 8
* c-continued-statement-offset: 8
* c-continued-brace-offset: 0
* c-brace-offset: -8
* c-brace-imaginary-offset: 0
* c-argdecl-indent: 8
* c-label-offset: -8
* c++-hanging-braces: 1
* c++-access-specifier-offset: -8
* c++-empty-arglist-indent: 8
* c++-friend-offset: 0
* End:
*/
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