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freebsd-nq/sys/pc98/cbus/fdc.c
Yoshihiro Takahashi aadcbac104 MFi386: sys/isa/fd.c revision from 1.205 to 1.219.
2001-09-16 12:39:59 +00:00

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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)
*
* Copyright (c) 2001 Joerg Wunsch,
* joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. 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 "card.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/devicestat.h>
#include <sys/disklabel.h>
#include <sys/fcntl.h>
#include <sys/fdcio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/clock.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <isa/isavar.h>
#ifdef PC98
#include <pc98/pc98/pc98.h>
#include <pc98/pc98/pc98_machdep.h>
#include <pc98/pc98/epsonio.h>
#include <pc98/pc98/fdreg.h>
#else
#include <isa/isareg.h>
#include <isa/fdreg.h>
#include <isa/rtc.h>
#endif
enum fdc_type
{
FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
};
enum fdc_states {
DEVIDLE,
FINDWORK,
DOSEEK,
SEEKCOMPLETE ,
IOCOMPLETE,
RECALCOMPLETE,
STARTRECAL,
RESETCTLR,
SEEKWAIT,
RECALWAIT,
MOTORWAIT,
IOTIMEDOUT,
RESETCOMPLETE,
PIOREAD
};
#ifdef FDC_DEBUG
static char const * const fdstates[] = {
"DEVIDLE",
"FINDWORK",
"DOSEEK",
"SEEKCOMPLETE",
"IOCOMPLETE",
"RECALCOMPLETE",
"STARTRECAL",
"RESETCTLR",
"SEEKWAIT",
"RECALWAIT",
"MOTORWAIT",
"IOTIMEDOUT",
"RESETCOMPLETE",
"PIOREAD"
};
#endif
/*
* Per controller structure (softc).
*/
struct fdc_data
{
int fdcu; /* our unit number */
int dmachan;
int flags;
#define FDC_ATTACHED 0x01
#define FDC_STAT_VALID 0x08
#define FDC_HAS_FIFO 0x10
#define FDC_NEEDS_RESET 0x20
#define FDC_NODMA 0x40
#define FDC_ISPNP 0x80
#define FDC_ISPCMCIA 0x100
struct fd_data *fd;
int fdu; /* the active drive */
enum fdc_states state;
int retry;
#ifndef PC98
int fdout; /* mirror of the w/o digital output reg */
#endif
u_int status[7]; /* copy of the registers */
enum fdc_type fdct; /* chip version of FDC */
int fdc_errs; /* number of logged errors */
int dma_overruns; /* number of DMA overruns */
struct bio_queue_head head;
struct bio *bp; /* active buffer */
#ifdef PC98
struct resource *res_ioport, *res_fdsio, *res_fdemsio;
struct resource *res_irq, *res_drq;
int rid_ioport, rid_irq, rid_drq;
#else
struct resource *res_ioport, *res_ctl, *res_irq, *res_drq;
int rid_ioport, rid_ctl, rid_irq, rid_drq;
#endif
int port_off;
bus_space_tag_t portt;
bus_space_handle_t porth;
#ifdef PC98
bus_space_tag_t sc_fdsiot;
bus_space_handle_t sc_fdsioh;
bus_space_tag_t sc_fdemsiot;
bus_space_handle_t sc_fdemsioh;
#else
bus_space_tag_t ctlt;
bus_space_handle_t ctlh;
#endif
void *fdc_intr;
struct device *fdc_dev;
#ifndef PC98
void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v);
#endif
};
typedef int fdu_t;
typedef int fdcu_t;
typedef int fdsu_t;
typedef struct fd_data *fd_p;
typedef struct fdc_data *fdc_p;
typedef enum fdc_type fdc_t;
#define FDUNIT(s) (((s) >> 6) & 3)
#define FDTYPE(s) ((s) & 0x3f)
/*
* fdc maintains a set (1!) of ivars per child of each controller.
*/
enum fdc_device_ivars {
FDC_IVAR_FDUNIT,
};
/*
* Simple access macros for the ivars.
*/
#define FDC_ACCESSOR(A, B, T) \
static __inline T fdc_get_ ## A(device_t dev) \
{ \
uintptr_t v; \
BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
return (T) v; \
}
FDC_ACCESSOR(fdunit, FDUNIT, int)
/* configuration flags */
#define FDC_PRETEND_D0 (1 << 0) /* pretend drive 0 to be there */
#define FDC_NO_FIFO (1 << 2) /* do not enable FIFO */
/* 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 */
/*
* Stop retrying after this many DMA overruns. Since each retry takes
* one revolution, with 300 rpm., 25 retries take approximately 5
* seconds which the read attempt will block in case the DMA overrun
* is persistent.
*/
#define FDC_DMAOV_MAX 25
#ifdef PC98
#define NUMTYPES 12
#define NUMDENS NUMTYPES
#else
#define NUMTYPES 17
#define NUMDENS (NUMTYPES - 7)
#endif
#define NO_TYPE 0
#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_640 9
#define FD_1232 10
#ifdef PC98
#define FD_1280 11
#define FD_1476 12
#define FDT_NONE 0 /* none present */
#define FDT_12M 1 /* 1M/640K FDD */
#define FDT_144M 2 /* 1.44M/1M/640K FDD */
#else
#define FD_1480in5_25 11
#define FD_1440in5_25 12
#define FD_820in5_25 13
#define FD_800in5_25 14
#define FD_720in5_25 15
#define FD_360in5_25 16
#define FD_640in5_25 17
#endif
#define BIO_RDSECTID BIO_CMD1
static struct fd_type fd_types[NUMTYPES] =
{
#ifdef PC98
{ 21,2,0xFF,0x04,82,3444,1,2,2,0x0C,2 }, /* 1.72M in 3mode */
{ 18,2,0xFF,0x1B,82,2952,1,2,2,0x54,1 }, /* 1.48M in 3mode */
{ 18,2,0xFF,0x1B,80,2880,1,2,2,0x54,1 }, /* 1.44M in 3mode */
{ 15,2,0xFF,0x1B,80,2400,1,0,2,0x54,1 }, /* 1.2M */
{ 10,2,0xFF,0x10,82,1640,1,1,2,0x30,1 }, /* 820K */
{ 10,2,0xFF,0x10,80,1600,1,1,2,0x30,1 }, /* 800K */
{ 9,2,0xFF,0x20,80,1440,1,1,2,0x50,1 }, /* 720K */
{ 9,2,0xFF,0x20,40, 720,2,1,2,0x50,1 }, /* 360K */
{ 8,2,0xFF,0x2A,80,1280,1,1,2,0x50,1 }, /* 640K */
{ 8,3,0xFF,0x35,77,1232,1,0,2,0x74,1 }, /* 1.23M 1024/sec */
{ 8,3,0xFF,0x35,80,1280,1,0,2,0x74,1 }, /* 1.28M 1024/sec */
{ 9,3,0xFF,0x35,82,1476,1,0,2,0x47,1 }, /* 1.48M 1024/sec 9sec */
#if 0
{ 10,3,0xFF,0x1B,82,1640,1,2,2,0x54,1 }, /* 1.64M in 3mode - Reserve */
#endif
#else
{ 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 */
{ 8,2,0xFF,0x2A,80,1280,1,FDC_250KBPS,2,0x50,1 }, /* 640K in DD 5.25in */
{ 8,3,0xFF,0x35,77,1232,1,FDC_500KBPS,2,0x74,1 }, /* 1.23M in HD 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 */
{ 8,2,0xFF,0x2A,80,1280,1,FDC_300KBPS,2,0x50,1 }, /* 640K in HD 5.25in */
#endif
};
#ifdef PC98
static bus_addr_t fdc_iat[] = {0, 2, 4};
#endif
#ifdef PC98
#define DRVS_PER_CTLR 4 /* 4 floppies */
#else
#define DRVS_PER_CTLR 2 /* 2 floppies */
#endif
#define MAX_SEC_SIZE (128 << 3)
#define MAX_CYLINDER 85 /* some people really stress their drives
* up to cyl 82 */
#define MAX_HEAD 1
static devclass_t fdc_devclass;
/*
* Per drive structure (softc).
*/
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 */
#ifdef PC98
int pc98_trans;
#endif
struct callout_handle toffhandle;
struct callout_handle tohandle;
struct devstat device_stats;
eventhandler_tag clonetag;
dev_t masterdev;
#define NCLONEDEVS 10 /* must match the table below */
dev_t clonedevs[NCLONEDEVS];
device_t dev;
fdu_t fdu;
};
struct fdc_ivars {
int fdunit;
};
static devclass_t fd_devclass;
#ifdef EPSON_NRDISK
typedef unsigned int nrd_t;
#define P_NRD_ADDRH 0xc24
#define P_NRD_ADDRM 0xc22
#define P_NRD_ADDRL 0xc20
#define P_NRD_CHECK 0xc20
#define P_NRD_DATA 0xc26
#define P_NRD_LED 0xc36
#define B_NRD_CHK 0x80
#define B_NRD_LED 0x40
#define A_NRD_INFO 0x2
#define A_NRD_BASE 0x400
#define NRD_STATUS 0x0
#define NRD_ST0_HD 0x04
static fdu_t nrdu=-1;
static int nrdsec=0;
static nrd_t nrdblkn=0;
static nrd_t nrdaddr=0x0;
#define nrd_check_ready() ({ \
(epson_inb(P_NRD_CHECK) & B_NRD_CHK) ? 0 : 1; \
})
#define nrd_LED_on() epson_outb(P_NRD_LED, B_NRD_LED)
#define nrd_LED_off() epson_outb(P_NRD_LED, ~B_NRD_LED)
#define nrd_trac() ((int)(nrd_info(nrdaddr) & 0xff))
#define nrd_head() ((int)((nrd_info(nrdaddr) >> 8) & 0xff))
#define nrd_sec() ((int)(nrd_info(nrdaddr + 2) & 0xff))
#define nrd_secsize() ((int)((nrd_info(A_NRD_INFO) >> 8) & 0xff))
#define nrd_addrset(p) nrd_addr((nrd_t)((nrd_t)p+A_NRD_BASE))
static inline void
nrd_addr(addr)
nrd_t addr;
{
epson_outb(P_NRD_ADDRH, (u_char)((addr >> 16) & 0x1f));
epson_outb(P_NRD_ADDRM, (u_char)((addr >> 8) & 0xff));
epson_outb(P_NRD_ADDRL, (u_char)(addr & 0xff));
}
static inline u_short
nrd_info(addr)
nrd_t addr;
{
nrd_addr(addr);
return (epson_inw(P_NRD_DATA));
}
#endif /* EPSON_NRDISK */
/*
* 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)
*/
/*
* Function declarations, same (chaotic) order as they appear in the
* file. Re-ordering is too late now, it would only obfuscate the
* diffs against old and offspring versions (like the PC98 one).
*
* Anyone adding functions here, please keep this sequence the same
* as below -- makes locating a particular function in the body much
* easier.
*/
#ifndef PC98
static void fdout_wr(fdc_p, u_int8_t);
#endif
static u_int8_t fdsts_rd(fdc_p);
static void fddata_wr(fdc_p, u_int8_t);
static u_int8_t fddata_rd(fdc_p);
#ifndef PC98
static void fdctl_wr_isa(fdc_p, u_int8_t);
#if NCARD > 0
static void fdctl_wr_pcmcia(fdc_p, u_int8_t);
#endif
#endif /* PC98 */
#if 0
static u_int8_t fdin_rd(fdc_p);
#endif
static int fdc_err(struct fdc_data *, const char *);
static int fd_cmd(struct fdc_data *, int, ...);
static int enable_fifo(fdc_p fdc);
static int fd_sense_drive_status(fdc_p, int *);
static int fd_sense_int(fdc_p, int *, int *);
static int fd_read_status(fdc_p);
static int fdc_alloc_resources(struct fdc_data *);
static void fdc_release_resources(struct fdc_data *);
static int fdc_read_ivar(device_t, device_t, int, uintptr_t *);
static int fdc_probe(device_t);
#if NCARD > 0
static int fdc_pccard_probe(device_t);
#endif
static int fdc_detach(device_t dev);
static void fdc_add_child(device_t, const char *, int);
static int fdc_attach(device_t);
static int fdc_print_child(device_t, device_t);
static void fd_clone (void *, char *, int, dev_t *);
static int fd_probe(device_t);
static int fd_attach(device_t);
static int fd_detach(device_t);
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 int out_fdc(struct fdc_data *, int);
/*
* The open function is named Fdopen() to avoid confusion with fdopen()
* in fd(4). The difference is now only meaningful for debuggers.
*/
static d_open_t Fdopen;
static d_close_t fdclose;
static d_strategy_t fdstrategy;
static void fdstart(struct fdc_data *);
static timeout_t fd_iotimeout;
static timeout_t fd_pseudointr;
static driver_intr_t fdc_intr;
static int fdcpio(fdc_p, long, caddr_t, u_int);
static int fdstate(struct fdc_data *);
static int retrier(struct fdc_data *);
static void fdbiodone(struct bio *);
static int fdmisccmd(dev_t, u_int, void *);
static d_ioctl_t fdioctl;
static int fifo_threshold = 8; /* XXX: should be accessible via sysctl */
#ifdef FDC_DEBUG
/* CAUTION: fd_debug causes huge amounts of logging output */
static int volatile fd_debug = 0;
#define TRACE0(arg) do { if (fd_debug) printf(arg); } while (0)
#define TRACE1(arg1, arg2) do { if (fd_debug) printf(arg1, arg2); } while (0)
#else /* FDC_DEBUG */
#define TRACE0(arg) do { } while (0)
#define TRACE1(arg1, arg2) do { } while (0)
#endif /* FDC_DEBUG */
/*
* Bus space handling (access to low-level IO).
*/
#ifndef PC98
static void
fdout_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDOUT+fdc->port_off, v);
}
#endif
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);
}
#ifdef PC98
static void
fdctl_wr(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDCTL, v);
}
#endif
#ifndef PC98
static void
fdctl_wr_isa(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->ctlt, fdc->ctlh, 0, v);
}
#if NCARD > 0
static void
fdctl_wr_pcmcia(fdc_p fdc, u_int8_t v)
{
bus_space_write_1(fdc->portt, fdc->porth, FDCTL+fdc->port_off, v);
}
#endif
#endif /* PC98 */
#if 0
static u_int8_t
fdin_rd(fdc_p fdc)
{
return bus_space_read_1(fdc->portt, fdc->porth, FDIN);
}
#endif
#define CDEV_MAJOR 9
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,
};
/*
* Auxiliary functions. Well, some only. Others are scattered
* throughout the entire file.
*/
static int
fdc_err(struct fdc_data *fdc, const char *s)
{
fdc->fdc_errs++;
if (s) {
if (fdc->fdc_errs < FDC_ERRMAX)
device_printf(fdc->fdc_dev, "%s", s);
else if (fdc->fdc_errs == FDC_ERRMAX)
device_printf(fdc->fdc_dev, "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) {
/*
* 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;
#ifdef EPSON_NRDISK
if (fdc->fdu == nrdu) {
if (fdc->fd->track >= 0) nrdaddr = (fdc->fd->track + 1) * 8;
else nrdaddr = 0x0;
*st0p = nrd_head() ? NRD_ST0_HD : NRD_STATUS;
*cylp = nrd_trac();
}
else {
#endif /* EPSON_NRDISK */
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;
#ifdef EPSON_NRDISK
}
#endif /* EPSON_NRDISK */
return 0;
}
static int
fd_read_status(fdc_p fdc)
{
int i, ret;
for (i = ret = 0; i < 7; i++) {
/*
* XXX types are poorly chosen. Only bytes can be read
* from the hardware, but fdc->status[] wants u_ints and
* fd_in() gives ints.
*/
int status;
#ifdef EPSON_NRDISK
if (fdc->fdu == nrdu) {
switch (i) {
case 0: fdc->status[i] = nrd_head()
? NRD_ST0_HD : NRD_STATUS; break;
case 1: fdc->status[i] = NRD_STATUS; break;
case 2: fdc->status[i] = NRD_STATUS; break;
case 3: fdc->status[i] = nrd_trac(); break;
case 4: fdc->status[i] = nrd_head(); break;
case 5: fdc->status[i] = nrdsec; break;
case 6: fdc->status[i] = nrd_secsize(); break;
}
ret = 0;
}
else {
#endif /* EPSON_NRDISK */
ret = fd_in(fdc, &status);
fdc->status[i] = status;
if (ret != 0)
break;
#ifdef EPSON_NRDISK
}
#endif /* EPSON_NRDISK */
}
if (ret == 0)
fdc->flags |= FDC_STAT_VALID;
else
fdc->flags &= ~FDC_STAT_VALID;
return ret;
}
#ifdef PC98
static int pc98_trans = 0; /* 0 : HD , 1 : DD , 2 : 1.44 */
static int pc98_trans_prev = 0;
static void set_density(fdc_p fdc)
{
/* always motor on */
bus_space_write_1(fdc->sc_fdsiot, fdc->sc_fdsioh, 0,
(pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC);
DELAY(100);
fdctl_wr(fdc, FDC_RST | FDC_DMAE);
/* in the case of note W, always inhibit 100ms timer */
}
static int pc98_fd_check_ready(fdu_t fdu)
{
fd_p fd = devclass_get_softc(fd_devclass, fdu);
struct fdc_data *fdc = fd->fdc;
int retry = 0, status;
#ifdef EPSON_NRDISK
if (fdu == nrdu) {
if (nrd_check_ready()) return 0;
else return -1;
}
#endif
while (retry++ < 30000) {
set_motor(fdc, fd->fdsu, TURNON);
out_fdc(fdc, NE7CMD_SENSED); /* Sense Drive Status */
DELAY(100);
out_fdc(fdc, fdu); /* Drive number */
DELAY(100);
fd_in(fdc, &status);
if ((status & NE7_ST3_RD)) {
fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
DELAY(10);
return 0;
}
}
return -1;
}
#endif
static int
fdc_alloc_resources(struct fdc_data *fdc)
{
device_t dev;
#ifdef PC98
int rid;
#else
int ispnp, ispcmcia, nports;
#endif
dev = fdc->fdc_dev;
#ifndef PC98
ispnp = (fdc->flags & FDC_ISPNP) != 0;
ispcmcia = (fdc->flags & FDC_ISPCMCIA) != 0;
#endif
fdc->rid_ioport = fdc->rid_irq = fdc->rid_drq = 0;
fdc->res_ioport = fdc->res_irq = fdc->res_drq = 0;
#ifdef PC98
fdc->res_ioport = isa_alloc_resourcev(dev, SYS_RES_IOPORT,
&fdc->rid_ioport, fdc_iat,
3, RF_ACTIVE);
if (fdc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range\n");
return ENXIO;
}
isa_load_resourcev(fdc->res_ioport, fdc_iat, 3);
#else
/*
* On standard ISA, we don't just use an 8 port range
* (e.g. 0x3f0-0x3f7) since that covers an IDE control
* register at 0x3f6.
*
* Isn't PC hardware wonderful.
*
* The Y-E Data PCMCIA FDC doesn't have this problem, it
* uses the register with offset 6 for pseudo-DMA, and the
* one with offset 7 as control register.
*/
nports = ispcmcia ? 8 : (ispnp ? 1 : 6);
fdc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&fdc->rid_ioport, 0ul, ~0ul,
nports, RF_ACTIVE);
if (fdc->res_ioport == 0) {
device_printf(dev, "cannot reserve I/O port range (%d ports)\n",
nports);
return ENXIO;
}
#endif
fdc->portt = rman_get_bustag(fdc->res_ioport);
fdc->porth = rman_get_bushandle(fdc->res_ioport);
#ifdef PC98
rid = 3;
bus_set_resource(dev, SYS_RES_IOPORT, rid, IO_FDPORT, 1);
fdc->res_fdsio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
1, RF_ACTIVE);
if (fdc->res_fdsio == 0)
return ENXIO;
fdc->sc_fdsiot = rman_get_bustag(fdc->res_fdsio);
fdc->sc_fdsioh = rman_get_bushandle(fdc->res_fdsio);
rid = 4;
bus_set_resource(dev, SYS_RES_IOPORT, rid, 0x4be, 1);
fdc->res_fdemsio = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0,
1, RF_ACTIVE);
if (fdc->res_fdemsio == 0)
return ENXIO;
fdc->sc_fdemsiot = rman_get_bustag(fdc->res_fdemsio);
fdc->sc_fdemsioh = rman_get_bushandle(fdc->res_fdemsio);
#endif
#ifndef PC98
if (!ispcmcia) {
/*
* Some BIOSen 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.
*/
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 0) == 4)
fdc->port_off = -2;
/*
* Register the control port range as rid 1 if it
* isn't there already. Most PnP BIOSen will have
* already done this but non-PnP configurations don't.
*
* 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.
*/
if (bus_get_resource_count(dev, SYS_RES_IOPORT, 1) == 0) {
u_long ctlstart;
/* Find the control port, usually 0x3f7 */
ctlstart = rman_get_start(fdc->res_ioport) +
fdc->port_off + 7;
bus_set_resource(dev, SYS_RES_IOPORT, 1, ctlstart, 1);
}
/*
* Now (finally!) allocate the control port.
*/
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 control I/O port range (control port)\n");
return ENXIO;
}
fdc->ctlt = rman_get_bustag(fdc->res_ctl);
fdc->ctlh = rman_get_bushandle(fdc->res_ctl);
}
#endif
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");
return ENXIO;
}
if ((fdc->flags & FDC_NODMA) == 0) {
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");
return ENXIO;
}
fdc->dmachan = fdc->res_drq->r_start;
}
return 0;
}
static void
fdc_release_resources(struct fdc_data *fdc)
{
device_t dev;
dev = fdc->fdc_dev;
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);
}
#ifndef PC98
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);
}
#endif
#ifdef PC98
if (fdc->res_fdsio != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, 3,
fdc->res_fdsio);
bus_release_resource(dev, SYS_RES_IOPORT, 3, fdc->res_fdsio);
}
if (fdc->res_fdemsio != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, 4,
fdc->res_fdemsio);
bus_release_resource(dev, SYS_RES_IOPORT, 4, fdc->res_fdemsio);
}
#endif
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);
}
}
/*
* Configuration/initialization stuff, per controller.
*/
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}
};
static int
fdc_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct fdc_ivars *ivars = device_get_ivars(child);
switch (which) {
case FDC_IVAR_FDUNIT:
*result = ivars->fdunit;
break;
default:
return ENOENT;
}
return 0;
}
static int
fdc_probe(device_t dev)
{
#ifdef PC98
int error;
#else
int error, ic_type;
#endif
struct fdc_data *fdc;
fdc = device_get_softc(dev);
bzero(fdc, sizeof *fdc);
fdc->fdc_dev = dev;
#ifndef PC98
fdc->fdctl_wr = fdctl_wr_isa;
#endif
/* Check pnp ids */
error = ISA_PNP_PROBE(device_get_parent(dev), dev, fdc_ids);
if (error == ENXIO)
return ENXIO;
if (error == 0)
fdc->flags |= FDC_ISPNP;
/* Attempt to allocate our resources for the duration of the probe */
error = fdc_alloc_resources(fdc);
if (error)
goto out;
#ifndef PC98
/* First - lets reset the floppy controller */
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
#endif
/* see if it can handle a command */
#ifdef PC98
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(4, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
#else
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
#endif
#ifndef PC98
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;
}
}
#endif
out:
fdc_release_resources(fdc);
return (error);
}
#if NCARD > 0
static int
fdc_pccard_probe(device_t dev)
{
int error;
struct fdc_data *fdc;
fdc = device_get_softc(dev);
bzero(fdc, sizeof *fdc);
fdc->fdc_dev = dev;
#ifndef PC98
fdc->fdctl_wr = fdctl_wr_pcmcia;
#endif
fdc->flags |= FDC_ISPCMCIA | FDC_NODMA;
/* Attempt to allocate our resources for the duration of the probe */
error = fdc_alloc_resources(fdc);
if (error)
goto out;
#ifndef PC98
/* First - lets reset the floppy controller */
fdout_wr(fdc, 0);
DELAY(100);
fdout_wr(fdc, FDO_FRST);
#endif
/* see if it can handle a command */
#ifdef PC98
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(4, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
#else
if (fd_cmd(fdc, 3, NE7CMD_SPECIFY, NE7_SPEC_1(3, 240),
NE7_SPEC_2(2, 0), 0)) {
error = ENXIO;
goto out;
}
#endif
device_set_desc(dev, "Y-E Data PCMCIA floppy");
fdc->fdct = FDC_NE765;
out:
fdc_release_resources(fdc);
return (error);
}
#endif /* NCARD > 0 */
static int
fdc_detach(device_t dev)
{
struct fdc_data *fdc;
int error;
fdc = device_get_softc(dev);
/* have our children detached first */
if ((error = bus_generic_detach(dev)))
return (error);
#ifdef PC98
/* reset controller, turn motor off */
fdc_reset(fdc);
#else
/* reset controller, turn motor off */
fdout_wr(fdc, 0);
#endif
if ((fdc->flags & FDC_NODMA) == 0)
isa_dma_release(fdc->dmachan);
if ((fdc->flags & FDC_ATTACHED) == 0) {
device_printf(dev, "already unloaded\n");
return (0);
}
fdc->flags &= ~FDC_ATTACHED;
BUS_TEARDOWN_INTR(device_get_parent(dev), dev, fdc->res_irq,
fdc->fdc_intr);
fdc_release_resources(fdc);
device_printf(dev, "unload\n");
return (0);
}
/*
* Add a child device to the fdc controller. It will then be probed etc.
*/
static void
fdc_add_child(device_t dev, const char *name, int unit)
{
int disabled;
struct fdc_ivars *ivar;
device_t child;
ivar = malloc(sizeof *ivar, M_DEVBUF /* XXX */, M_NOWAIT | M_ZERO);
if (ivar == NULL)
return;
if (resource_int_value(name, unit, "drive", &ivar->fdunit) != 0)
ivar->fdunit = 0;
child = device_add_child(dev, name, unit);
if (child == NULL)
return;
device_set_ivars(child, ivar);
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;
const char *name, *dname;
int i, error, dunit;
fdc = device_get_softc(dev);
error = fdc_alloc_resources(fdc);
if (error) {
device_printf(dev, "cannot re-acquire resources\n");
return error;
}
error = BUS_SETUP_INTR(device_get_parent(dev), dev, fdc->res_irq,
INTR_TYPE_BIO | INTR_ENTROPY, fdc_intr, fdc,
&fdc->fdc_intr);
if (error) {
device_printf(dev, "cannot setup interrupt\n");
return error;
}
fdc->fdcu = device_get_unit(dev);
fdc->flags |= FDC_ATTACHED | FDC_NEEDS_RESET;
if ((fdc->flags & FDC_NODMA) == 0) {
/*
* 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, MAX_SEC_SIZE);
}
fdc->state = DEVIDLE;
#ifdef PC98
/* reset controller, turn motor off, clear fdout mirror reg */
fdc_reset(fdc);
#else
/* reset controller, turn motor off, clear fdout mirror reg */
fdout_wr(fdc, fdc->fdout = 0);
#endif
bioq_init(&fdc->head);
/*
* Probe and attach any children. We should probably detect
* devices from the BIOS unless overridden.
*/
name = device_get_nameunit(dev);
i = 0;
while ((resource_find_match(&i, &dname, &dunit, "at", name)) == 0)
fdc_add_child(dev, dname, dunit);
if ((error = bus_generic_attach(dev)) != 0)
return (error);
return (0);
}
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),
fdc_get_fdunit(child));
return (retval);
}
static device_method_t fdc_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fdc_probe),
DEVMETHOD(device_attach, fdc_attach),
DEVMETHOD(device_detach, fdc_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),
DEVMETHOD(bus_read_ivar, fdc_read_ivar),
/* 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);
#ifndef PC98
DRIVER_MODULE(fdc, acpi, fdc_driver, fdc_devclass, 0, 0);
#endif
#if NCARD > 0
static device_method_t fdc_pccard_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fdc_pccard_probe),
DEVMETHOD(device_attach, fdc_attach),
DEVMETHOD(device_detach, fdc_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),
DEVMETHOD(bus_read_ivar, fdc_read_ivar),
/* Our children never use any other bus interface methods. */
{ 0, 0 }
};
static driver_t fdc_pccard_driver = {
"fdc",
fdc_pccard_methods,
sizeof(struct fdc_data)
};
DRIVER_MODULE(fdc, pccard, fdc_pccard_driver, fdc_devclass, 0, 0);
#endif /* NCARD > 0 */
static struct {
char *match;
int minor;
int link;
} fd_suffix[] = {
/*
* Genuine clone devices must come first, and their number must
* match NCLONEDEVS above.
*/
{ ".1720", 1, 0 },
{ ".1480", 2, 0 },
{ ".1440", 3, 0 },
{ ".1200", 4, 0 },
{ ".820", 5, 0 },
{ ".800", 6, 0 },
{ ".720", 7, 0 },
{ ".360", 8, 0 },
{ ".640", 9, 0 },
{ ".1232", 10, 0 },
#ifdef PC98
{ ".1280", 11, 0 },
{ ".1476", 12, 0 },
#endif
{ "a", 0, 1 },
{ "b", 0, 1 },
{ "c", 0, 1 },
{ "d", 0, 1 },
{ "e", 0, 1 },
{ "f", 0, 1 },
{ "g", 0, 1 },
{ "h", 0, 1 },
{ 0, 0 }
};
static void
fd_clone(void *arg, char *name, int namelen, dev_t *dev)
{
struct fd_data *fd;
int u, d, i;
char *n;
fd = (struct fd_data *)arg;
if (*dev != NODEV)
return;
if (dev_stdclone(name, &n, "fd", &u) != 2)
return;
for (i = 0; ; i++) {
if (fd_suffix[i].match == NULL)
return;
if (strcmp(n, fd_suffix[i].match))
continue;
d = fd_suffix[i].minor;
break;
}
if (fd_suffix[i].link == 0) {
*dev = make_dev(&fd_cdevsw, (u << 6) + d,
UID_ROOT, GID_OPERATOR, 0640, name);
fd->clonedevs[i] = *dev;
} else {
*dev = make_dev_alias(fd->masterdev, name);
}
}
/*
* Configuration/initialization, per drive.
*/
static int
fd_probe(device_t dev)
{
#ifdef PC98
u_int fdt;
#else
int i;
u_int fdt, st0, st3;
#endif
struct fd_data *fd;
struct fdc_data *fdc;
fdsu_t fdsu;
#ifndef PC98
static int fd_fifo = 0;
#endif
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 PC98
/* look up what bios thinks we have */
switch (fd->fdu) {
case 0: case 1: case 2: case 3:
if ((PC98_SYSTEM_PARAMETER(0x5ae) >> fd->fdu) & 0x01)
fdt = FDT_144M;
#ifdef EPSON_NRDISK
else if ((PC98_SYSTEM_PARAMETER(0x55c) >> fd->fdu) & 0x01) {
fdt = FDT_12M;
switch (epson_machine_id) {
case 0x20: case 0x27:
if ((PC98_SYSTEM_PARAMETER(0x488) >> fd->fdu) & 0x01) {
if (nrd_check_ready()) {
nrd_LED_on();
nrdu = fd->fdu;
} else {
fdt = FDT_NONE;
}
}
}
}
#else /* !EPSON_NRDISK */
else if ((PC98_SYSTEM_PARAMETER(0x55c) >> fd->fdu) & 0x01) {
fdt = FDT_12M;
switch (epson_machine_id) {
case 0x20: case 0x27:
if ((PC98_SYSTEM_PARAMETER(0x488) >> fd->fdu) & 0x01)
fdt = FDT_NONE;
}
}
#endif /* EPSON_NRDISK */
else
fdt = FDT_NONE;
break;
default:
fdt = FDT_NONE;
break;
}
#else
#ifdef __i386__
/* look up what bios thinks we have */
switch (fd->fdu) {
case 0:
if ((fdc->flags & FDC_ISPCMCIA))
fdt = RTCFDT_144M;
else 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
#endif
/* is there a unit? */
#ifdef PC98
if (fdt == FDT_NONE)
return (ENXIO);
#else
if (fdt == RTCFDT_NONE)
return (ENXIO);
#endif
#ifndef PC98
/* select it */
set_motor(fdc, fdsu, TURNON);
fdc_reset(fdc); /* XXX reset, then unreset, etc. */
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
&& (device_get_flags(fdc->fdc_dev) & FDC_NO_FIFO) == 0
&& enable_fifo(fdc) == 0) {
device_printf(device_get_parent(dev),
"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);
#endif /* PC98 */
fd->track = FD_NO_TRACK;
fd->fdc = fdc;
fd->fdsu = fdsu;
fd->options = 0;
callout_handle_init(&fd->toffhandle);
callout_handle_init(&fd->tohandle);
#ifdef PC98
switch (fdt) {
case FDT_144M:
/* Check 3mode I/F */
fd->pc98_trans = 0;
bus_space_write_1(fdc->sc_fdemsiot, fdc->sc_fdemsioh, 0,
(fd->fdu << 5) | 0x10);
if (!(bus_space_read_1(fdc->sc_fdemsiot, fdc->sc_fdemsioh, 0) &
0x01)) {
device_set_desc(dev, "1.44M FDD");
fd->type = FD_1440;
break;
}
device_printf(dev,
"Warning: can't control 3mode I/F, fallback to 2mode.\n");
/* FALLTHROUGH */
case FDT_12M:
#ifdef EPSON_NRDISK
if (fd->fdu == nrdu) {
device_set_desc(dev, "EPSON RAM DRIVE");
nrd_LED_off();
} else
#endif
device_set_desc(dev, "1M/640K FDD");
fd->type = FD_1200;
fd->pc98_trans = 0;
break;
default:
return (ENXIO);
}
#else
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);
}
#endif
return (0);
}
static int
fd_attach(device_t dev)
{
struct fd_data *fd;
static int cdevsw_add_done;
int i;
if (!cdevsw_add_done) {
cdevsw_add(&fd_cdevsw); /* XXX */
cdevsw_add_done = 1;
}
fd = device_get_softc(dev);
fd->clonetag = EVENTHANDLER_REGISTER(dev_clone, fd_clone, fd, 1000);
fd->masterdev = make_dev(&fd_cdevsw, fd->fdu << 6,
UID_ROOT, GID_OPERATOR, 0640, "fd%d", fd->fdu);
for (i = 0; i < NCLONEDEVS; i++)
fd->clonedevs[i] = NODEV;
devstat_add_entry(&fd->device_stats, device_get_name(dev),
device_get_unit(dev), 0, DEVSTAT_NO_ORDERED_TAGS,
DEVSTAT_TYPE_FLOPPY | DEVSTAT_TYPE_IF_OTHER,
DEVSTAT_PRIORITY_FD);
return (0);
}
static int
fd_detach(device_t dev)
{
struct fd_data *fd;
int i;
fd = device_get_softc(dev);
untimeout(fd_turnoff, fd, fd->toffhandle);
devstat_remove_entry(&fd->device_stats);
destroy_dev(fd->masterdev);
for (i = 0; i < NCLONEDEVS; i++)
if (fd->clonedevs[i] != NODEV)
destroy_dev(fd->clonedevs[i]);
cdevsw_remove(&fd_cdevsw);
EVENTHANDLER_DEREGISTER(dev_clone, fd->clonetag);
return (0);
}
static device_method_t fd_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, fd_probe),
DEVMETHOD(device_attach, fd_attach),
DEVMETHOD(device_detach, fd_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);
/*
* More auxiliary functions.
*/
/*
* 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)
{
#ifdef PC98
bus_space_write_1(fdc->sc_fdsiot, fdc->sc_fdsioh, 0,
(pc98_trans != 1 ? FDP_FDDEXC : 0) | FDP_PORTEXC);
DELAY(10);
fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
#else
int fdout;
fdout = fdc->fdout;
if (turnon) {
fdout &= ~FDO_FDSEL;
fdout |= (FDO_MOEN0 << fdsu) | FDO_FDMAEN | FDO_FRST | fdsu;
} else
fdout &= ~(FDO_MOEN0 << fdsu);
fdc->fdout = fdout;
fdout_wr(fdc, fdout);
TRACE1("[0x%x->FDOUT]", fdout);
#endif
}
static void
fd_turnoff(void *xfd)
{
int s;
fd_p fd = xfd;
TRACE1("[fd%d: turnoff]", fd->fdu);
s = splbio();
/*
* Don't turn off the motor yet if the drive is active.
*
* If we got here, this could only mean we missed an interrupt.
* This can e. g. happen on the Y-E Date PCMCIA floppy controller
* after a controller reset. Just schedule a pseudo-interrupt
* so the state machine gets re-entered.
*/
if (fd->fdc->state != DEVIDLE && fd->fdc->fdu == fd->fdu) {
fdc_intr(fd->fdc);
splx(s);
return;
}
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 */
#ifdef PC98
set_density(fdc);
if (pc98_machine_type & M_EPSON_PC98)
fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DD | FDC_MTON);
else
fdctl_wr(fdc, FDC_RST | FDC_RDY | FDC_DMAE | FDC_MTON);
DELAY(200);
fdctl_wr(fdc, FDC_DMAE | FDC_MTON);
DELAY(10);
#else
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);
#endif
/* XXX after a reset, silently believe the FDC will accept commands */
#ifdef PC98
(void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(4, 240), NE7_SPEC_2(2, 0),
0);
#else
(void)fd_cmd(fdc, 3, NE7CMD_SPECIFY,
NE7_SPEC_1(3, 240), NE7_SPEC_2(2, 0),
0);
#endif
if (fdc->flags & FDC_HAS_FIFO)
(void) enable_fifo(fdc);
}
/*
* FDC IO functions, take care of the main status register, timeout
* in case the desired status bits are never set.
*/
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);
}
/*
* Block device driver interface functions (interspersed with even more
* auxiliary functions).
*/
int
Fdopen(dev_t dev, int flags, int mode, struct thread *td)
{
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);
#ifdef PC98
if (type == 0)
type = FD_1200; /* XXX backward compatibility */
else
; /* XXX any types are OK for PC-98 */
if (pc98_fd_check_ready(fdu) == -1)
return(EIO);
#else
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
&& type != FD_640
)
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_1232:
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_640:
type = FD_640in5_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
&& type != FD_640
)
return(ENXIO);
break;
}
}
}
#endif
fd->ft = fd_types + type - 1;
fd->flags |= FD_OPEN;
/*
* Clearing the DMA overrun counter at open time is a bit messy.
* Since we're only managing one counter per controller, opening
* the second drive could mess it up. Anyway, if the DMA overrun
* condition is really persistent, it will eventually time out
* still. OTOH, clearing it here will ensure we'll at least start
* trying again after a previous (maybe even long ago) failure.
* Also, this is merely a stop-gap measure only that should not
* happen during normal operation, so we can tolerate it to be a
* bit sloppy about this.
*/
fdc->dma_overruns = 0;
return 0;
}
int
fdclose(dev_t dev, int flags, int mode, struct thread *td)
{
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 | FDOPT_NOERRLOG | FDOPT_NOERROR);
return (0);
}
void
fdstrategy(struct bio *bp)
{
long blknum, nblocks;
int s;
fdu_t fdu;
fdc_p fdc;
fd_p fd;
size_t fdblk;
fdu = FDUNIT(minor(bp->bio_dev));
fd = devclass_get_softc(fd_devclass, fdu);
if (fd == 0)
panic("fdstrategy: buf for nonexistent device (%#lx, %#lx)",
(u_long)major(bp->bio_dev), (u_long)minor(bp->bio_dev));
fdc = fd->fdc;
if (fd->type == NO_TYPE) {
bp->bio_error = ENXIO;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
fdblk = 128 << (fd->ft->secsize);
if (bp->bio_cmd != BIO_FORMAT && bp->bio_cmd != BIO_RDSECTID) {
if (bp->bio_blkno < 0) {
printf(
"fd%d: fdstrat: bad request blkno = %lu, bcount = %ld\n",
fdu, (u_long)bp->bio_blkno, bp->bio_bcount);
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
if ((bp->bio_bcount % fdblk) != 0) {
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
}
/*
* Set up block calculations.
*/
if (bp->bio_blkno > 20000000) {
/*
* Reject unreasonably high block number, prevent the
* multiplication below from overflowing.
*/
bp->bio_error = EINVAL;
bp->bio_flags |= BIO_ERROR;
goto bad;
}
blknum = bp->bio_blkno * DEV_BSIZE / fdblk;
nblocks = fd->ft->size;
if (blknum + bp->bio_bcount / fdblk > nblocks) {
if (blknum >= nblocks) {
if (bp->bio_cmd == BIO_READ)
bp->bio_resid = bp->bio_bcount;
else {
bp->bio_error = ENOSPC;
bp->bio_flags |= BIO_ERROR;
}
goto bad; /* not always bad, but EOF */
}
bp->bio_bcount = (nblocks - blknum) * fdblk;
}
bp->bio_pblkno = bp->bio_blkno;
s = splbio();
bioqdisksort(&fdc->head, bp);
untimeout(fd_turnoff, fd, fd->toffhandle); /* a good idea */
devstat_start_transaction(&fd->device_stats);
device_busy(fd->dev);
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);
}
/*
* fdc_intr
*
* 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))
;
}
/*
* Magic pseudo-DMA initialization for YE FDC. Sets count and
* direction.
*/
#define SET_BCDR(fdc,wr,cnt,port) \
bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port, \
((cnt)-1) & 0xff); \
bus_space_write_1(fdc->portt, fdc->porth, fdc->port_off + port + 1, \
((wr ? 0x80 : 0) | ((((cnt)-1) >> 8) & 0x7f)));
/*
* fdcpio(): perform programmed IO read/write for YE PCMCIA floppy.
*/
static int
fdcpio(fdc_p fdc, long flags, caddr_t addr, u_int count)
{
u_char *cptr = (u_char *)addr;
if (flags == BIO_READ) {
if (fdc->state != PIOREAD) {
fdc->state = PIOREAD;
return(0);
}
SET_BCDR(fdc, 0, count, 0);
bus_space_read_multi_1(fdc->portt, fdc->porth, fdc->port_off +
FDC_YE_DATAPORT, cptr, count);
} else {
bus_space_write_multi_1(fdc->portt, fdc->porth, fdc->port_off +
FDC_YE_DATAPORT, cptr, count);
SET_BCDR(fdc, 0, count, 0);
}
return(1);
}
/*
* The controller state machine.
*
* If it returns a non zero value, it should be called again immediately.
*/
static int
fdstate(fdc_p fdc)
{
struct fdc_readid *idp;
int read, format, rdsectid, cylinder, head, i, sec = 0, sectrac;
int st0, cyl, st3, idf;
unsigned long blknum;
fdu_t fdu = fdc->fdu;
fd_p fd;
register struct bio *bp;
struct fd_formb *finfo = NULL;
size_t fdblk;
bp = fdc->bp;
if (bp == NULL) {
bp = bioq_first(&fdc->head);
if (bp != NULL) {
bioq_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_printf(fdc->fdc_dev,
"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->bio_dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
if (fdc->fd && (fd != fdc->fd))
device_printf(fd->dev, "confused fd pointers\n");
read = bp->bio_cmd == BIO_READ;
if (read)
idf = ISADMA_READ;
else
idf = ISADMA_WRITE;
format = bp->bio_cmd == BIO_FORMAT;
rdsectid = bp->bio_cmd == BIO_RDSECTID;
if (format)
finfo = (struct fd_formb *)bp->bio_data;
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;
#ifdef PC98
pc98_trans = fd->ft->trans;
if (pc98_trans_prev != pc98_trans) {
int i;
set_density(fdc);
for (i = 0; i < 10; i++) {
outb(0x5f, 0);
outb(0x5f, 0);
}
pc98_trans_prev = pc98_trans;
}
if (pc98_trans != fd->pc98_trans) {
if (fd->type == FD_1440) {
bus_space_write_1(fdc->sc_fdemsiot,
fdc->sc_fdemsioh,
0,
(fdu << 5) | 0x10 |
(pc98_trans >> 1));
outb(0x5f, 0);
outb(0x5f, 0);
}
fd->pc98_trans = pc98_trans;
}
#else
fdc->fdctl_wr(fdc, fd->ft->trans);
#endif
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); /* will return later */
}
/*
* Maybe if it's not starting, it SHOULD be starting.
*/
#ifdef EPSON_NRDISK
if (fdu != nrdu) {
if (!(fd->flags & FD_MOTOR))
{
fdc->state = MOTORWAIT;
fd_turnon(fdu);
return(0);
}
else /* at least make sure we are selected */
{
set_motor(fdcu, fd->fdsu, TURNON);
}
}
#else /* !EPSON_NRDISK */
if (!(fd->flags & FD_MOTOR))
{
fdc->state = MOTORWAIT;
fd_turnon(fd);
return (0); /* will return later */
}
else /* at least make sure we are selected */
{
set_motor(fdc, fd->fdsu, TURNON);
}
#endif
if (fdc->flags & FDC_NEEDS_RESET) {
fdc->state = RESETCTLR;
fdc->flags &= ~FDC_NEEDS_RESET;
} else
fdc->state = DOSEEK;
return (1); /* will return immediately */
case DOSEEK:
#ifdef PC98
blknum = bp->bio_pblkno * DEV_BSIZE / fdblk + fd->skip / fdblk;
#else
blknum = bp->bio_pblkno + fd->skip / fdblk;
#endif
cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
if (cylinder == fd->track)
{
fdc->state = SEEKCOMPLETE;
return (1); /* will return immediately */
}
#ifdef PC98
pc98_fd_check_ready(fdu);
#endif
if (fd_cmd(fdc, 3, NE7CMD_SEEK,
fd->fdsu, 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 */
#ifdef PC98
blknum = bp->bio_pblkno * DEV_BSIZE / fdblk + fd->skip / fdblk;
#else
blknum = bp->bio_pblkno + fd->skip / fdblk;
#endif
cylinder = blknum / (fd->ft->sectrac * fd->ft->heads);
/* Make sure seek really happened. */
if(fd->track == FD_NO_TRACK) {
int descyl = 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); /* will return later */
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;
#ifdef EPSON_NRDISK
if (fdu == nrdu) st3 = NE7_ST3_T0;
#endif /* EPSON_NRDISK */
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));
}
}
#ifdef EPSON_NRDISK
if (fdu == nrdu) cyl = descyl;
#endif
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 = cylinder;
if (format)
fd->skip = (char *)&(finfo->fd_formb_cylno(0))
- (char *)finfo;
#ifdef EPSON_NRDISK
if (fdu != nrdu) {
#endif /* EPSON_NRDISK */
if (!rdsectid && !(fdc->flags & FDC_NODMA))
isa_dmastart(idf, bp->bio_data+fd->skip,
format ? bp->bio_bcount : fdblk, fdc->dmachan);
#ifdef PC98
blknum = bp->bio_pblkno * DEV_BSIZE / fdblk + fd->skip / fdblk;
#else
blknum = bp->bio_pblkno + fd->skip / fdblk;
#endif
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 || rdsectid))
{
/* make sure the drive is writable */
if(fd_sense_drive_status(fdc, &st3) != 0)
{
/* stuck controller? */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_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); /* will return immediately */
}
}
if (format) {
if (fdc->flags & FDC_NODMA) {
/*
* This seems to be necessary for
* whatever obscure reason; if we omit
* it, we end up filling the sector ID
* fields of the newly formatted track
* entirely with garbage, causing
* `wrong cylinder' errors all over
* the place when trying to read them
* back.
*
* Umpf.
*/
SET_BCDR(fdc, 1, bp->bio_bcount, 0);
(void)fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,
bp->bio_bcount);
}
/* 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 */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
} else if (rdsectid) {
if (fd_cmd(fdc, 2, NE7CMD_READID, head << 2 | fdu, 0)) {
/* controller jamming */
fdc->retry = 6;
return (retrier(fdc));
}
} else {
/* read or write operation */
if (fdc->flags & FDC_NODMA) {
/*
* This seems to be necessary even when
* reading data.
*/
SET_BCDR(fdc, 1, fdblk, 0);
/*
* Perform the write pseudo-DMA before
* the WRITE command is sent.
*/
if (!read)
(void)fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,
fdblk);
}
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 */
if (!(fdc->flags & FDC_NODMA))
isa_dmadone(idf,
bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
fdc->retry = 6;
return (retrier(fdc));
}
}
if (!rdsectid && (fdc->flags & FDC_NODMA))
/*
* If this is a read, then simply await interrupt
* before performing PIO.
*/
if (read && !fdcpio(fdc,bp->bio_cmd,
bp->bio_data+fd->skip,fdblk)) {
fd->tohandle = timeout(fd_iotimeout, fdc, hz);
return(0); /* will return later */
}
/*
* Write (or format) operation will fall through and
* await completion interrupt.
*/
fdc->state = IOCOMPLETE;
fd->tohandle = timeout(fd_iotimeout, fdc, hz);
return (0); /* will return later */
#ifdef EPSON_NRDISK
}
else {
nrdblkn = (nrd_t)((unsigned long)bp->b_blkno*DEV_BSIZE/fdblk
+ fd->skip/fdblk);
nrd_LED_on();
nrd_addrset(fdblk * nrdblkn);
while (!nrd_check_ready()) DELAY(1);
if (read) epson_insw(P_NRD_DATA,
bp->bio_data + fd->skip,
fdblk / sizeof(short));
else epson_outsw(P_NRD_DATA,
bp->bio_data + fd->skip,
(format ? bp->bio_bcount : fdblk)
/ sizeof(short));
blknum = (unsigned long)bp->b_blkno*DEV_BSIZE/fdblk
+ fd->skip/fdblk;
sectrac = fd->ft->sectrac;
sec = blknum % (sectrac * fd->ft->heads);
head = sec / sectrac;
sec = sec % sectrac + 1;
fd->hddrv = ((head&1)<<2)+fdu;
if (nrdsec++ >= nrd_sec())
nrdaddr = (nrd_t)(fd->track * 8 + head * 4);
nrdsec = sec;
fdc->state = IOCOMPLETE;
}
#endif
case PIOREAD:
/*
* Actually perform the PIO read. The IOCOMPLETE case
* removes the timeout for us.
*/
(void)fdcpio(fdc,bp->bio_cmd,bp->bio_data+fd->skip,fdblk);
fdc->state = IOCOMPLETE;
/* FALLTHROUGH */
case IOCOMPLETE: /* IO done, post-analyze */
#ifdef EPSON_NRDISK
if (fdu != nrdu)
untimeout(fd_iotimeout, fdc, fd->tohandle);
#else
untimeout(fd_iotimeout, fdc, fd->tohandle);
#endif
if (fd_read_status(fdc)) {
if (!rdsectid && !(fdc->flags & FDC_NODMA))
isa_dmadone(idf, bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk,
fdc->dmachan);
if (fdc->retry < 6)
fdc->retry = 6; /* force a reset */
return (retrier(fdc));
}
fdc->state = IOTIMEDOUT;
/* FALLTHROUGH */
case IOTIMEDOUT:
#ifdef EPSON_NRDISK
if (fdu != nrdu) {
#endif /* EPSON_NRDISK */
if (!rdsectid && !(fdc->flags & FDC_NODMA))
isa_dmadone(idf, bp->bio_data + fd->skip,
format ? bp->bio_bcount : fdblk, fdc->dmachan);
#ifdef EPSON_NRDISK
}
else nrd_LED_off();
#endif /* EPSON_NRDISK */
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.
*
* We normally restart this without bumping
* the retry counter. However, in case
* something is seriously messed up (like
* broken hardware), we rather limit the
* number of retries so the IO operation
* doesn't block indefinately.
*/
if (fdc->dma_overruns++ < FDC_DMAOV_MAX) {
fdc->state = SEEKCOMPLETE;
return (1);/* will return immediately */
} /* else fall through */
}
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 */
if (rdsectid) {
/* copy out ID field contents */
idp = (struct fdc_readid *)bp->bio_data;
idp->cyl = fdc->status[3];
idp->head = fdc->status[4];
idp->sec = fdc->status[5];
idp->secshift = fdc->status[6];
}
/* Operation successful, retry DMA overruns again next time. */
fdc->dma_overruns = 0;
fd->skip += fdblk;
if (!rdsectid && !format && fd->skip < bp->bio_bcount) {
/* set up next transfer */
fdc->state = DOSEEK;
} else {
/* ALL DONE */
fd->skip = 0;
bp->bio_resid = 0;
fdc->bp = NULL;
device_unbusy(fd->dev);
biofinish(bp, &fd->device_stats, 0);
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
fdc->state = FINDWORK;
}
return (1); /* will return immediately */
case RESETCTLR:
fdc_reset(fdc);
fdc->retry++;
fdc->state = RESETCOMPLETE;
return (0); /* will return later */
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;
/* FALLTHROUGH */
case STARTRECAL:
#ifdef PC98
pc98_fd_check_ready(fdu);
#endif
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); /* will return later */
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);
#ifdef EPSON_NRDISK
if (fdu == nrdu) {
st0 = NE7_ST0_IC_NT;
cyl = 0;
}
#endif
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 immediately */
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
fdc->state = DOSEEK;
return (1); /* will return immediately */
default:
device_printf(fdc->fdc_dev, "unexpected FD int->");
if (fd_read_status(fdc) == 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); /* will return later */
}
printf("ST0 = %x, PCN = %x\n", st0, cyl);
return (0); /* will return later */
}
/* noone should ever get here */
}
static int
retrier(struct fdc_data *fdc)
{
struct bio *bp;
struct fd_data *fd;
int fdu;
bp = fdc->bp;
/* XXX shouldn't this be cached somewhere? */
fdu = FDUNIT(minor(bp->bio_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:
if ((fd->options & FDOPT_NOERRLOG) == 0) {
diskerr(bp, "hard error", fdc->fd->skip / DEV_BSIZE,
(struct disklabel *)NULL);
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");
}
if ((fd->options & FDOPT_NOERROR) == 0) {
bp->bio_flags |= BIO_ERROR;
bp->bio_error = EIO;
bp->bio_resid = bp->bio_bcount - fdc->fd->skip;
} else
bp->bio_resid = 0;
fdc->bp = NULL;
fdc->fd->skip = 0;
device_unbusy(fd->dev);
biofinish(bp, &fdc->fd->device_stats, 0);
fdc->state = FINDWORK;
fdc->flags |= FDC_NEEDS_RESET;
fdc->fd = (fd_p) 0;
fdc->fdu = -1;
return (1);
}
fdc->retry++;
return (1);
}
static void
fdbiodone(struct bio *bp)
{
wakeup(bp);
}
static int
fdmisccmd(dev_t dev, u_int cmd, void *data)
{
fdu_t fdu;
fd_p fd;
struct bio *bp;
struct fd_formb *finfo;
struct fdc_readid *idfield;
size_t fdblk;
fdu = FDUNIT(minor(dev));
fd = devclass_get_softc(fd_devclass, fdu);
fdblk = 128 << fd->ft->secsize;
finfo = (struct fd_formb *)data;
idfield = (struct fdc_readid *)data;
bp = malloc(sizeof(struct bio), M_TEMP, M_ZERO);
/*
* Set up a bio request for fdstrategy(). bio_blkno is faked
* so that fdstrategy() will seek to the the requested
* cylinder, and use the desired head. Since we are not
* interested in bioqdisksort() munging with our faked bio
* request, we mark it as being an ordered request.
*/
bp->bio_cmd = cmd;
if (cmd == BIO_FORMAT) {
bp->bio_blkno =
(finfo->cyl * (fd->ft->sectrac * fd->ft->heads) +
finfo->head * fd->ft->sectrac) *
fdblk / DEV_BSIZE;
bp->bio_bcount = sizeof(struct fd_idfield_data) *
finfo->fd_formb_nsecs;
} else if (cmd == BIO_RDSECTID) {
bp->bio_blkno =
(idfield->cyl * (fd->ft->sectrac * fd->ft->heads) +
idfield->head * fd->ft->sectrac) *
fdblk / DEV_BSIZE;
bp->bio_bcount = sizeof(struct fdc_readid);
} else
panic("wrong cmd in fdmisccmd()");
bp->bio_data = data;
bp->bio_dev = dev;
bp->bio_done = fdbiodone;
bp->bio_flags = BIO_ORDERED;
/*
* Now run the command. The wait loop is a version of bufwait()
* adapted for struct bio instead of struct buf and specialized
* for the current context.
*/
fdstrategy(bp);
while ((bp->bio_flags & BIO_DONE) == 0)
tsleep(bp, PRIBIO, "fdcmd", 0);
free(bp, M_TEMP);
return (bp->bio_flags & BIO_ERROR ? bp->bio_error : 0);
}
static int
fdioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
fdu_t fdu;
fd_p fd;
struct fd_type *fdt;
struct disklabel *lp;
struct fdc_status *fsp;
struct fdc_readid *rid;
size_t fdblk;
int error;
fdu = FDUNIT(minor(dev));
fd = devclass_get_softc(fd_devclass, fdu);
#ifdef PC98
pc98_fd_check_ready(fdu);
#endif
fdblk = 128 << fd->ft->secsize;
error = 0;
switch (cmd) {
case DIOCGDINFO:
lp = malloc(sizeof(*lp), M_TEMP, M_ZERO);
lp->d_secsize = fdblk;
fdt = fd->ft;
lp->d_secpercyl = fdt->size / fdt->tracks;
lp->d_type = DTYPE_FLOPPY;
if (readdisklabel(dkmodpart(dev, RAW_PART), lp) != NULL)
error = EINVAL;
else
*(struct disklabel *)addr = *lp;
free(lp, M_TEMP);
break;
case DIOCSDINFO:
if ((flag & FWRITE) == 0)
return (EBADF);
/*
* XXX perhaps should call setdisklabel() to do error checking
* although there is nowhere to "set" the result. Perhaps
* should always just fail.
*/
break;
case DIOCWLABEL:
if ((flag & FWRITE) == 0)
return (EBADF);
break;
case DIOCWDINFO:
if ((flag & FWRITE) == 0)
return (EBADF);
lp = malloc(DEV_BSIZE, M_TEMP, M_ZERO);
error = setdisklabel(lp, (struct disklabel *)addr, (u_long)0);
if (error != 0)
error = writedisklabel(dev, lp);
free(lp, M_TEMP);
break;
case FD_FORM:
if ((flag & FWRITE) == 0)
return (EBADF); /* must be opened for writing */
if (((struct fd_formb *)addr)->format_version !=
FD_FORMAT_VERSION)
return (EINVAL); /* wrong version of formatting prog */
error = fdmisccmd(dev, BIO_FORMAT, addr);
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_td(td) != 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;
#ifdef FDC_DEBUG
case FD_DEBUG:
if ((fd_debug != 0) != (*(int *)addr != 0)) {
fd_debug = (*(int *)addr != 0);
printf("fd%d: debugging turned %s\n",
fd->fdu, fd_debug ? "on" : "off");
}
break;
#endif
case FD_CLRERR:
if (suser_td(td) != 0)
return (EPERM);
fd->fdc->fdc_errs = 0;
break;
case FD_GSTAT:
fsp = (struct fdc_status *)addr;
if ((fd->fdc->flags & FDC_STAT_VALID) == 0)
return (EINVAL);
memcpy(fsp->status, fd->fdc->status, 7 * sizeof(u_int));
break;
case FD_READID:
rid = (struct fdc_readid *)addr;
if (rid->cyl > MAX_CYLINDER || rid->head > MAX_HEAD)
return (EINVAL);
error = fdmisccmd(dev, BIO_RDSECTID, addr);
break;
default:
error = ENOTTY;
break;
}
return (error);
}
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