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Subject[PATCHSET] PC-9800 subarch. support for 2.5.60 (4/34) AC#4
This is patchset to support NEC PC-9800 subarchitecture
against 2.5.60 (4/34).

PC98 support patch in 2.5.50-ac1 with minimum changes
to apply 2.5.60.
2.5.50-ac1-floppy98-1.patch and 2.5.50-ac1-floppy98-2.patch
make drivers/block/floppy98.c in 2.5.50-ac1.

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.50/drivers/block/floppy98.c linux.50-ac1/drivers/block/floppy98.c
--- linux.50/drivers/block/floppy98.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.50-ac1/drivers/block/floppy98.c 2003-02-11 18:39:41.000000000 +0900
@@ -0,0 +1,2315 @@
+/*
+ * linux/drivers/block/floppy.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 1993, 1994 Alain Knaff
+ * Copyright (C) 1998 Alan Cox
+ */
+/*
+ * 02.12.91 - Changed to static variables to indicate need for reset
+ * and recalibrate. This makes some things easier (output_byte reset
+ * checking etc), and means less interrupt jumping in case of errors,
+ * so the code is hopefully easier to understand.
+ */
+
+/*
+ * This file is certainly a mess. I've tried my best to get it working,
+ * but I don't like programming floppies, and I have only one anyway.
+ * Urgel. I should check for more errors, and do more graceful error
+ * recovery. Seems there are problems with several drives. I've tried to
+ * correct them. No promises.
+ */
+
+/*
+ * As with hd.c, all routines within this file can (and will) be called
+ * by interrupts, so extreme caution is needed. A hardware interrupt
+ * handler may not sleep, or a kernel panic will happen. Thus I cannot
+ * call "floppy-on" directly, but have to set a special timer interrupt
+ * etc.
+ */
+
+/*
+ * 28.02.92 - made track-buffering routines, based on the routines written
+ * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
+ */
+
+/*
+ * Automatic floppy-detection and formatting written by Werner Almesberger
+ * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
+ * the floppy-change signal detection.
+ */
+
+/*
+ * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
+ * FDC data overrun bug, added some preliminary stuff for vertical
+ * recording support.
+ *
+ * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
+ *
+ * TODO: Errors are still not counted properly.
+ */
+
+/* 1992/9/20
+ * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
+ * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
+ * Christoph H. Hochst\"atter.
+ * I have fixed the shift values to the ones I always use. Maybe a new
+ * ioctl() should be created to be able to modify them.
+ * There is a bug in the driver that makes it impossible to format a
+ * floppy as the first thing after bootup.
+ */
+
+/*
+ * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
+ * this helped the floppy driver as well. Much cleaner, and still seems to
+ * work.
+ */
+
+/* 1994/6/24 --bbroad-- added the floppy table entries and made
+ * minor modifications to allow 2.88 floppies to be run.
+ */
+
+/* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
+ * disk types.
+ */
+
+/*
+ * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
+ * format bug fixes, but unfortunately some new bugs too...
+ */
+
+/* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
+ * errors to allow safe writing by specialized programs.
+ */
+
+/* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
+ * by defining bit 1 of the "stretch" parameter to mean put sectors on the
+ * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
+ * drives are "upside-down").
+ */
+
+/*
+ * 1995/8/26 -- Andreas Busse -- added Mips support.
+ */
+
+/*
+ * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
+ * features to asm/floppy.h.
+ */
+
+/*
+ * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of
+ * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting &
+ * use of '0' for NULL.
+ */
+
+/*
+ * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation
+ * failures.
+ */
+
+/*
+ * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives.
+ */
+
+/*
+ * 1999/01/19 -- N.Fujita & Linux/98 Project -- Added code for NEC PC-9800
+ * series.
+ */
+
+/*
+ * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24
+ * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were
+ * being used to store jiffies, which are unsigned longs).
+ */
+
+/*
+ * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * - get rid of check_region
+ * - s/suser/capable/
+ */
+
+/*
+ * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no
+ * floppy controller (lingering task on list after module is gone... boom.)
+ */
+
+/*
+ * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range
+ * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix
+ * requires many non-obvious changes in arch dependent code.
+ */
+
+/*
+ * 2002/10/12 -- Osamu Tomita <tomita@cinet.co.jp>
+ * split code from floppy.c
+ * support NEC PC-9800 only
+ */
+
+#define FLOPPY_SANITY_CHECK
+#undef FLOPPY_SILENT_DCL_CLEAR
+
+/*
+#define PC9800_DEBUG_FLOPPY
+#define PC9800_DEBUG_FLOPPY2
+*/
+
+#define REALLY_SLOW_IO
+
+#define DEBUGT 2
+#define DCL_DEBUG /* debug disk change line */
+
+/* do print messages for unexpected interrupts */
+static int print_unex=1;
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#define FDPATCHES
+#include <linux/fdreg.h>
+
+/*
+ * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support
+ */
+
+
+#include <linux/fd.h>
+#define FLOPPY98_MOTOR_MASK 0x08
+
+#define FDPATCHES
+#include <linux/hdreg.h>
+#define FD98_STATUS (0 + FD_IOPORT )
+#define FD98_DATA (2 + FD_IOPORT )
+#define FD_MODE (4 + FD_IOPORT )
+#define FD_MODE_CHANGE 0xbe
+#define FD_EMODE_CHANGE 0x4be
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/bio.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/mc146818rtc.h> /* CMOS defines */
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/device.h>
+#include <linux/buffer_head.h> /* for invalidate_buffers() */
+
+/*
+ * PS/2 floppies have much slower step rates than regular floppies.
+ * It's been recommended that take about 1/4 of the default speed
+ * in some more extreme cases.
+ */
+static int slow_floppy;
+
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#ifndef DEFAULT_FLOPPY_IRQ
+# define DEFAULT_FLOPPY_IRQ 11
+#endif
+#ifndef DEFAULT_FLOPPY_DMA
+# define DEFAULT_FLOPPY_DMA 2
+#endif
+
+static int FLOPPY_IRQ=DEFAULT_FLOPPY_IRQ;
+static int FLOPPY_DMA=DEFAULT_FLOPPY_DMA;
+static int can_use_virtual_dma=2;
+static int auto_detect_mode = 0;
+static int retry_auto_detect = 0;
+#define FD_AFTER_RESET_DELAY 1000
+
+/* =======
+ * can use virtual DMA:
+ * 0 = use of virtual DMA disallowed by config
+ * 1 = use of virtual DMA prescribed by config
+ * 2 = no virtual DMA preference configured. By default try hard DMA,
+ * but fall back on virtual DMA when not enough memory available
+ */
+
+static int use_virtual_dma;
+/* =======
+ * use virtual DMA
+ * 0 using hard DMA
+ * 1 using virtual DMA
+ * This variable is set to virtual when a DMA mem problem arises, and
+ * reset back in floppy_grab_irq_and_dma.
+ * It is not safe to reset it in other circumstances, because the floppy
+ * driver may have several buffers in use at once, and we do currently not
+ * record each buffers capabilities
+ */
+
+static spinlock_t floppy_lock = SPIN_LOCK_UNLOCKED;
+
+static unsigned short virtual_dma_port=0x3f0;
+void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs);
+static int set_mode(char mask, char data);
+static void register_devfs_entries (int drive) __init;
+static devfs_handle_t devfs_handle;
+
+#define K_64 0x10000 /* 64KB */
+
+/* the following is the mask of allowed drives. By default units 2 and
+ * 3 of both floppy controllers are disabled, because switching on the
+ * motor of these drives causes system hangs on some PCI computers. drive
+ * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
+ * a drive is allowed.
+ *
+ * NOTE: This must come before we include the arch floppy header because
+ * some ports reference this variable from there. -DaveM
+ */
+
+static int allowed_drive_mask = 0x0f;
+
+#include <asm/floppy.h>
+
+static int irqdma_allocated;
+
+#define LOCAL_END_REQUEST
+#define MAJOR_NR FLOPPY_MAJOR
+#define DEVICE_NAME "floppy"
+#define DEVICE_NR(device) ( (minor(device) & 3) | ((minor(device) & 0x80 ) >> 5 ))
+#include <linux/blk.h>
+#include <linux/blkpg.h>
+#include <linux/cdrom.h> /* for the compatibility eject ioctl */
+#include <linux/completion.h>
+
+static struct request *current_req;
+static struct request_queue floppy_queue;
+
+#ifndef fd_get_dma_residue
+#define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
+#endif
+
+/* Dma Memory related stuff */
+
+#ifndef fd_dma_mem_free
+#define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size))
+#endif
+
+#ifndef fd_dma_mem_alloc
+#define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size))
+#endif
+
+static inline void fallback_on_nodma_alloc(char **addr, size_t l)
+{
+#ifdef FLOPPY_CAN_FALLBACK_ON_NODMA
+ if (*addr)
+ return; /* we have the memory */
+ if (can_use_virtual_dma != 2)
+ return; /* no fallback allowed */
+ printk("DMA memory shortage. Temporarily falling back on virtual DMA\n");
+ *addr = (char *) nodma_mem_alloc(l);
+#else
+ return;
+#endif
+}
+
+/* End dma memory related stuff */
+
+static unsigned long fake_change;
+static int initialising=1;
+
+static inline int TYPE(kdev_t x) {
+ return (minor(x)>>2) & 0x1f;
+}
+static inline int DRIVE(kdev_t x) {
+ return (minor(x)&0x03) | ((minor(x)&0x80) >> 5);
+}
+#define ITYPE(x) (((x)>>2) & 0x1f)
+#define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
+#define UNIT(x) ((x) & 0x03) /* drive on fdc */
+#define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */
+#define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
+ /* reverse mapping from unit and fdc to drive */
+#define DP (&drive_params[current_drive])
+#define DRS (&drive_state[current_drive])
+#define DRWE (&write_errors[current_drive])
+#define FDCS (&fdc_state[fdc])
+#define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags))
+#define SETF(x) (set_bit(x##_BIT, &DRS->flags))
+#define TESTF(x) (test_bit(x##_BIT, &DRS->flags))
+
+#define UDP (&drive_params[drive])
+#define UDRS (&drive_state[drive])
+#define UDRWE (&write_errors[drive])
+#define UFDCS (&fdc_state[FDC(drive)])
+#define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags))
+#define USETF(x) (set_bit(x##_BIT, &UDRS->flags))
+#define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags))
+
+#define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args)
+
+#define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2)
+#define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
+
+#define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x)))
+
+/* read/write */
+#define COMMAND raw_cmd->cmd[0]
+#define DR_SELECT raw_cmd->cmd[1]
+#define TRACK raw_cmd->cmd[2]
+#define HEAD raw_cmd->cmd[3]
+#define SECTOR raw_cmd->cmd[4]
+#define SIZECODE raw_cmd->cmd[5]
+#define SECT_PER_TRACK raw_cmd->cmd[6]
+#define GAP raw_cmd->cmd[7]
+#define SIZECODE2 raw_cmd->cmd[8]
+#define NR_RW 9
+
+/* format */
+#define F_SIZECODE raw_cmd->cmd[2]
+#define F_SECT_PER_TRACK raw_cmd->cmd[3]
+#define F_GAP raw_cmd->cmd[4]
+#define F_FILL raw_cmd->cmd[5]
+#define NR_F 6
+
+/*
+ * Maximum disk size (in kilobytes). This default is used whenever the
+ * current disk size is unknown.
+ * [Now it is rather a minimum]
+ */
+#define MAX_DISK_SIZE 4 /* 3984*/
+
+
+/*
+ * globals used by 'result()'
+ */
+#define MAX_REPLIES 16
+static unsigned char reply_buffer[MAX_REPLIES];
+static int inr; /* size of reply buffer, when called from interrupt */
+#define ST0 (reply_buffer[0])
+#define ST1 (reply_buffer[1])
+#define ST2 (reply_buffer[2])
+#define ST3 (reply_buffer[0]) /* result of GETSTATUS */
+#define R_TRACK (reply_buffer[3])
+#define R_HEAD (reply_buffer[4])
+#define R_SECTOR (reply_buffer[5])
+#define R_SIZECODE (reply_buffer[6])
+
+#define SEL_DLY (2*HZ/100)
+
+/*
+ * this struct defines the different floppy drive types.
+ */
+static struct {
+ struct floppy_drive_params params;
+ const char *name; /* name printed while booting */
+} default_drive_params[]= {
+/* NOTE: the time values in jiffies should be in msec!
+ CMOS drive type
+ | Maximum data rate supported by drive type
+ | | Head load time, msec
+ | | | Head unload time, msec (not used)
+ | | | | Step rate interval, usec
+ | | | | | Time needed for spinup time (jiffies)
+ | | | | | | Timeout for spinning down (jiffies)
+ | | | | | | | Spindown offset (where disk stops)
+ | | | | | | | | Select delay
+ | | | | | | | | | RPS
+ | | | | | | | | | | Max number of tracks
+ | | | | | | | | | | | Interrupt timeout
+ | | | | | | | | | | | | Max nonintlv. sectors
+ | | | | | | | | | | | | | -Max Errors- flags */
+{{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0,
+ 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
+
+{{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0,
+ 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
+
+{{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0,
+ 0, { 2, 6, 4, 0, 0, 0, 0, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
+
+{{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
+ 0, { 4, 6, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
+
+{{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0,
+ 0, { 7,10, 2, 4, 6, 0, 0, 0}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
+
+{{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
+ 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
+
+{{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0,
+ 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
+/* | --autodetected formats--- | | |
+ * read_track | | Name printed when booting
+ * | Native format
+ * Frequency of disk change checks */
+};
+
+static struct floppy_drive_params drive_params[N_DRIVE];
+static struct floppy_drive_struct drive_state[N_DRIVE];
+static struct floppy_write_errors write_errors[N_DRIVE];
+static struct timer_list motor_off_timer[N_DRIVE];
+static struct gendisk *disks[N_DRIVE];
+static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
+
+/*
+ * This struct defines the different floppy types.
+ *
+ * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
+ * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch'
+ * tells if the disk is in Commodore 1581 format, which means side 0 sectors
+ * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
+ * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
+ * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
+ * side 0 is on physical side 0 (but with the misnamed sector IDs).
+ * 'stretch' should probably be renamed to something more general, like
+ * 'options'. Other parameters should be self-explanatory (see also
+ * setfdprm(8)).
+ */
+/*
+ Size
+ | Sectors per track
+ | | Head
+ | | | Tracks
+ | | | | Stretch
+ | | | | | Gap 1 size
+ | | | | | | Data rate, | 0x40 for perp
+ | | | | | | | Spec1 (stepping rate, head unload
+ | | | | | | | | /fmt gap (gap2) */
+static struct floppy_struct floppy_type[32] = {
+ { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */
+#if 0
+ { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */
+#else
+ { 2464,16,2,77,0,0x35,0x48,0xDF,0x74,"d360" }, /* 1 1.25MB 98 */
+#endif
+ { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */
+ { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */
+ { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */
+ { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */
+ { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */
+ { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */
+ { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */
+ { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */
+
+ { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */
+ { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */
+ { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */
+ { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */
+ { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */
+ { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */
+ { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */
+ { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */
+ { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */
+ { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */
+
+ { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */
+ { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */
+ { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */
+ { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */
+ { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */
+ { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */
+ { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */
+ { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */
+ { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */
+
+ { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */
+ { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */
+ { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */
+};
+
+#define NUMBER(x) (sizeof(x) / sizeof(*(x)))
+#define SECTSIZE (_FD_SECTSIZE(*floppy))
+
+/* Auto-detection: Disk type used until the next media change occurs. */
+static struct floppy_struct *current_type[N_DRIVE];
+
+/*
+ * User-provided type information. current_type points to
+ * the respective entry of this array.
+ */
+static struct floppy_struct user_params[N_DRIVE];
+
+static sector_t floppy_sizes[256];
+
+/*
+ * The driver is trying to determine the correct media format
+ * while probing is set. rw_interrupt() clears it after a
+ * successful access.
+ */
+static int probing;
+
+/* Synchronization of FDC access. */
+#define FD_COMMAND_NONE -1
+#define FD_COMMAND_ERROR 2
+#define FD_COMMAND_OKAY 3
+
+static volatile int command_status = FD_COMMAND_NONE;
+static unsigned long fdc_busy;
+static DECLARE_WAIT_QUEUE_HEAD(fdc_wait);
+static DECLARE_WAIT_QUEUE_HEAD(command_done);
+
+#define NO_SIGNAL (!interruptible || !signal_pending(current))
+#define CALL(x) if ((x) == -EINTR) return -EINTR
+#define ECALL(x) if ((ret = (x))) return ret;
+#define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
+#define WAIT(x) _WAIT((x),interruptible)
+#define IWAIT(x) _WAIT((x),1)
+
+/* Errors during formatting are counted here. */
+static int format_errors;
+
+/* Format request descriptor. */
+static struct format_descr format_req;
+
+/*
+ * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
+ * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
+ * H is head unload time (1=16ms, 2=32ms, etc)
+ */
+
+/*
+ * Track buffer
+ * Because these are written to by the DMA controller, they must
+ * not contain a 64k byte boundary crossing, or data will be
+ * corrupted/lost.
+ */
+static char *floppy_track_buffer;
+static int max_buffer_sectors;
+
+static int *errors;
+typedef void (*done_f)(int);
+static struct cont_t {
+ void (*interrupt)(void); /* this is called after the interrupt of the
+ * main command */
+ void (*redo)(void); /* this is called to retry the operation */
+ void (*error)(void); /* this is called to tally an error */
+ done_f done; /* this is called to say if the operation has
+ * succeeded/failed */
+} *cont;
+
+static void floppy_ready(void);
+static void floppy_start(void);
+static void process_fd_request(void);
+static void recalibrate_floppy(void);
+static void floppy_shutdown(unsigned long);
+
+static int floppy_grab_irq_and_dma(void);
+static void floppy_release_irq_and_dma(void);
+
+/*
+ * The "reset" variable should be tested whenever an interrupt is scheduled,
+ * after the commands have been sent. This is to ensure that the driver doesn't
+ * get wedged when the interrupt doesn't come because of a failed command.
+ * reset doesn't need to be tested before sending commands, because
+ * output_byte is automatically disabled when reset is set.
+ */
+#define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } }
+static void reset_fdc(void);
+
+/*
+ * These are global variables, as that's the easiest way to give
+ * information to interrupts. They are the data used for the current
+ * request.
+ */
+#define NO_TRACK -1
+#define NEED_1_RECAL -2
+#define NEED_2_RECAL -3
+
+static int usage_count;
+
+/* buffer related variables */
+static int buffer_track = -1;
+static int buffer_drive = -1;
+static int buffer_min = -1;
+static int buffer_max = -1;
+
+/* fdc related variables, should end up in a struct */
+static struct floppy_fdc_state fdc_state[N_FDC];
+static int fdc; /* current fdc */
+
+static struct floppy_struct *_floppy = floppy_type;
+static unsigned char current_drive;
+static long current_count_sectors;
+static unsigned char fsector_t; /* sector in track */
+static unsigned char in_sector_offset; /* offset within physical sector,
+ * expressed in units of 512 bytes */
+
+#ifndef fd_eject
+static inline int fd_eject(int drive)
+{
+ return -EINVAL;
+}
+#endif
+
+#ifdef DEBUGT
+static long unsigned debugtimer;
+#endif
+
+/*
+ * Debugging
+ * =========
+ */
+static inline void set_debugt(void)
+{
+#ifdef DEBUGT
+ debugtimer = jiffies;
+#endif
+}
+
+static inline void debugt(const char *message)
+{
+#ifdef DEBUGT
+ if (DP->flags & DEBUGT)
+ printk("%s dtime=%lu\n", message, jiffies-debugtimer);
+#endif
+}
+
+typedef void (*timeout_fn)(unsigned long);
+static struct timer_list fd_timeout = TIMER_INITIALIZER(floppy_shutdown, 0, 0);
+
+static const char *timeout_message;
+
+#ifdef FLOPPY_SANITY_CHECK
+static void is_alive(const char *message)
+{
+ /* this routine checks whether the floppy driver is "alive" */
+ if (fdc_busy && command_status < 2 && !timer_pending(&fd_timeout)){
+ DPRINT("timeout handler died: %s\n",message);
+ }
+}
+#endif
+
+static void (*do_floppy)(void) = NULL;
+
+#ifdef FLOPPY_SANITY_CHECK
+
+#define OLOGSIZE 20
+
+static void (*lasthandler)(void);
+static unsigned long interruptjiffies;
+static unsigned long resultjiffies;
+static int resultsize;
+static unsigned long lastredo;
+
+static struct output_log {
+ unsigned char data;
+ unsigned char status;
+ unsigned long jiffies;
+} output_log[OLOGSIZE];
+
+static int output_log_pos;
+#endif
+
+#define current_reqD -1
+#define MAXTIMEOUT -2
+
+static void reschedule_timeout(int drive, const char *message, int marg)
+{
+ if (drive == current_reqD)
+ drive = current_drive;
+ del_timer(&fd_timeout);
+ if (drive < 0 || drive > N_DRIVE) {
+ fd_timeout.expires = jiffies + 20UL*HZ;
+ drive=0;
+ } else
+ fd_timeout.expires = jiffies + UDP->timeout;
+ add_timer(&fd_timeout);
+ if (UDP->flags & FD_DEBUG){
+ DPRINT("reschedule timeout ");
+ printk(message, marg);
+ printk("\n");
+ }
+ timeout_message = message;
+}
+
+static int maximum(int a, int b)
+{
+ if (a > b)
+ return a;
+ else
+ return b;
+}
+#define INFBOUND(a,b) (a)=maximum((a),(b));
+
+static int minimum(int a, int b)
+{
+ if (a < b)
+ return a;
+ else
+ return b;
+}
+#define SUPBOUND(a,b) (a)=minimum((a),(b));
+
+
+/*
+ * Bottom half floppy driver.
+ * ==========================
+ *
+ * This part of the file contains the code talking directly to the hardware,
+ * and also the main service loop (seek-configure-spinup-command)
+ */
+
+/*
+ * disk change.
+ * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
+ * and the last_checked date.
+ *
+ * last_checked is the date of the last check which showed 'no disk change'
+ * FD_DISK_CHANGE is set under two conditions:
+ * 1. The floppy has been changed after some i/o to that floppy already
+ * took place.
+ * 2. No floppy disk is in the drive. This is done in order to ensure that
+ * requests are quickly flushed in case there is no disk in the drive. It
+ * follows that FD_DISK_CHANGE can only be cleared if there is a disk in
+ * the drive.
+ *
+ * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
+ * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
+ * each seek. If a disk is present, the disk change line should also be
+ * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
+ * change line is set, this means either that no disk is in the drive, or
+ * that it has been removed since the last seek.
+ *
+ * This means that we really have a third possibility too:
+ * The floppy has been changed after the last seek.
+ */
+
+static int disk_change(int drive)
+{
+ return UTESTF(FD_DISK_CHANGED);
+}
+
+static int set_mode(char mask, char data)
+{
+ register unsigned char newdor, olddor;
+
+ olddor = FDCS->dor;
+ newdor = (olddor & mask) | data;
+ if (newdor != olddor) {
+ FDCS->dor = newdor;
+ fd_outb(newdor, FD_MODE);
+ }
+
+ if (newdor & FLOPPY98_MOTOR_MASK)
+ floppy_grab_irq_and_dma();
+
+ if (olddor & FLOPPY98_MOTOR_MASK)
+ floppy_release_irq_and_dma();
+
+ return olddor;
+}
+
+static void twaddle(void)
+{
+ if (DP->select_delay)
+ return;
+
+ fd_outb(FDCS->dor & 0xf7, FD_MODE);
+ fd_outb(FDCS->dor, FD_MODE);
+ DRS->select_date = jiffies;
+}
+
+/* reset all driver information about the current fdc. This is needed after
+ * a reset, and after a raw command. */
+static void reset_fdc_info(int mode)
+{
+ int drive;
+
+ FDCS->spec1 = FDCS->spec2 = -1;
+ FDCS->need_configure = 1;
+ FDCS->perp_mode = 1;
+ FDCS->rawcmd = 0;
+ for (drive = 0; drive < N_DRIVE; drive++)
+ if (FDC(drive) == fdc &&
+ (mode || UDRS->track != NEED_1_RECAL))
+ UDRS->track = NEED_2_RECAL;
+}
+
+/* selects the fdc and drive, and enables the fdc's input/dma. */
+static void set_fdc(int drive)
+{
+ fdc = 0;
+ current_drive = drive;
+ set_mode(~0, 0x10);
+ if (FDCS->rawcmd == 2)
+ reset_fdc_info(1);
+
+ if (fd_inb(FD98_STATUS) != STATUS_READY)
+ FDCS->reset = 1;
+}
+
+/* locks the driver */
+static int _lock_fdc(int drive, int interruptible, int line)
+{
+ if (!usage_count){
+ printk(KERN_ERR "Trying to lock fdc while usage count=0 at line %d\n", line);
+ return -1;
+ }
+ if(floppy_grab_irq_and_dma()==-1)
+ return -EBUSY;
+
+ if (test_and_set_bit(0, &fdc_busy)) {
+ DECLARE_WAITQUEUE(wait, current);
+ add_wait_queue(&fdc_wait, &wait);
+
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ if (!test_and_set_bit(0, &fdc_busy))
+ break;
+
+ schedule();
+
+ if (!NO_SIGNAL) {
+ remove_wait_queue(&fdc_wait, &wait);
+ return -EINTR;
+ }
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&fdc_wait, &wait);
+ }
+ command_status = FD_COMMAND_NONE;
+
+ reschedule_timeout(drive, "lock fdc", 0);
+ set_fdc(drive);
+ return 0;
+}
+
+#define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__)
+
+#define LOCK_FDC(drive,interruptible) \
+if (lock_fdc(drive,interruptible)) return -EINTR;
+
+
+/* unlocks the driver */
+static inline void unlock_fdc(void)
+{
+ raw_cmd = 0;
+ if (!fdc_busy)
+ DPRINT("FDC access conflict!\n");
+
+ if (do_floppy)
+ DPRINT("device interrupt still active at FDC release: %p!\n",
+ do_floppy);
+ command_status = FD_COMMAND_NONE;
+ del_timer(&fd_timeout);
+ cont = NULL;
+ clear_bit(0, &fdc_busy);
+ floppy_release_irq_and_dma();
+ wake_up(&fdc_wait);
+}
+
+#ifndef CONFIG_PC9800_MOTOR_OFF /* tomita */
+
+/* switches the motor off after a given timeout */
+static void motor_off_callback(unsigned long nr)
+{
+ printk(KERN_DEBUG "fdc%lu: turn off motor\n", nr);
+}
+
+/* schedules motor off */
+static void floppy_off(unsigned int drive)
+{
+}
+
+#else /* CONFIG_PC9800_MOTOR_OFF */
+
+/* switches the motor off after a given timeout */
+static void motor_off_callback(unsigned long fdc)
+{
+ printk(KERN_DEBUG "fdc%u: turn off motor\n", (unsigned int) fdc);
+
+ fd_outb(0, FD_MODE); /* MTON = 0 */
+}
+
+static struct timer_list motor_off_timer[N_FDC] = {
+ { data: 0, function: motor_off_callback },
+#if N_FDC > 1
+ { data: 1, function: motor_off_callback },
+#endif
+#if N_FDC > 2
+# error "N_FDC > 2; please fix initializer for motor_off_timer[]"
+#endif
+};
+
+/* schedules motor off */
+static void floppy_off(unsigned int drive)
+{
+ unsigned long volatile delta;
+ register int fdc = FDC(drive);
+
+ if (!(FDCS->dor & (0x10 << UNIT(drive))))
+ return;
+
+ del_timer(motor_off_timer + fdc);
+
+#if 0
+ /* make spindle stop in a position which minimizes spinup time
+ * next time */
+ if (UDP->rps){
+ delta = jiffies - UDRS->first_read_date + HZ -
+ UDP->spindown_offset;
+ delta = ((delta * UDP->rps) % HZ) / UDP->rps;
+ motor_off_timer[drive].expires = jiffies + UDP->spindown - delta;
+ }
+#else
+ if (UDP->rps)
+ motor_off_timer[drive].expires = jiffies + UDP->spindown;
+#endif
+
+ add_timer(motor_off_timer + fdc);
+}
+
+#endif /* CONFIG_PC9800_MOTOR_OFF */
+
+/*
+ * cycle through all N_DRIVE floppy drives, for disk change testing.
+ * stopping at current drive. This is done before any long operation, to
+ * be sure to have up to date disk change information.
+ */
+static void scandrives(void)
+{
+ int i, drive, saved_drive;
+
+ if (DP->select_delay)
+ return;
+
+ saved_drive = current_drive;
+ for (i=0; i < N_DRIVE; i++){
+ drive = (saved_drive + i + 1) % N_DRIVE;
+ if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
+ continue; /* skip closed drives */
+ set_fdc(drive);
+ }
+ set_fdc(saved_drive);
+}
+
+static void empty(void)
+{
+}
+
+static DECLARE_WORK(floppy_work, NULL, NULL);
+
+static void schedule_bh( void (*handler)(void*) )
+{
+ PREPARE_WORK(&floppy_work, handler, NULL);
+ schedule_work(&floppy_work);
+}
+
+static struct timer_list fd_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+static void cancel_activity(void)
+{
+ do_floppy = NULL;
+ PREPARE_WORK(&floppy_work, (void*)(void*)empty, NULL);
+ del_timer(&fd_timer);
+}
+
+/* this function makes sure that the disk stays in the drive during the
+ * transfer */
+static void fd_watchdog(void)
+{
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("calling disk change from watchdog\n");
+ }
+#endif
+
+ if (disk_change(current_drive)){
+ DPRINT("disk removed during i/o\n");
+ cancel_activity();
+ cont->done(0);
+ reset_fdc();
+ } else {
+ del_timer(&fd_timer);
+ fd_timer.function = (timeout_fn) fd_watchdog;
+ fd_timer.expires = jiffies + HZ / 10;
+ add_timer(&fd_timer);
+ }
+}
+
+static void main_command_interrupt(void)
+{
+ del_timer(&fd_timer);
+ cont->interrupt();
+}
+
+/* waits for a delay (spinup or select) to pass */
+static int fd_wait_for_completion(unsigned long delay, timeout_fn function)
+{
+ if (FDCS->reset){
+ reset_fdc(); /* do the reset during sleep to win time
+ * if we don't need to sleep, it's a good
+ * occasion anyways */
+ return 1;
+ }
+
+ if ((signed) (jiffies - delay) < 0){
+ del_timer(&fd_timer);
+ fd_timer.function = function;
+ fd_timer.expires = delay;
+ add_timer(&fd_timer);
+ return 1;
+ }
+ return 0;
+}
+
+static spinlock_t floppy_hlt_lock = SPIN_LOCK_UNLOCKED;
+static int hlt_disabled;
+static void floppy_disable_hlt(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&floppy_hlt_lock, flags);
+ if (!hlt_disabled) {
+ hlt_disabled=1;
+#ifdef HAVE_DISABLE_HLT
+ disable_hlt();
+#endif
+ }
+ spin_unlock_irqrestore(&floppy_hlt_lock, flags);
+}
+
+static void floppy_enable_hlt(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&floppy_hlt_lock, flags);
+ if (hlt_disabled){
+ hlt_disabled=0;
+#ifdef HAVE_DISABLE_HLT
+ enable_hlt();
+#endif
+ }
+ spin_unlock_irqrestore(&floppy_hlt_lock, flags);
+}
+
+
+static void setup_DMA(void)
+{
+ unsigned long f;
+
+#ifdef FLOPPY_SANITY_CHECK
+ if (raw_cmd->length == 0){
+ int i;
+
+ printk("zero dma transfer size:");
+ for (i=0; i < raw_cmd->cmd_count; i++)
+ printk("%x,", raw_cmd->cmd[i]);
+ printk("\n");
+ cont->done(0);
+ FDCS->reset = 1;
+ return;
+ }
+ if (((unsigned long) raw_cmd->kernel_data) % 512){
+ printk("non aligned address: %p\n", raw_cmd->kernel_data);
+ cont->done(0);
+ FDCS->reset=1;
+ return;
+ }
+#endif
+ f=claim_dma_lock();
+ fd_disable_dma();
+#ifdef fd_dma_setup
+ if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
+ (raw_cmd->flags & FD_RAW_READ)?
+ DMA_MODE_READ : DMA_MODE_WRITE,
+ FDCS->address) < 0) {
+ release_dma_lock(f);
+ cont->done(0);
+ FDCS->reset=1;
+ return;
+ }
+ release_dma_lock(f);
+#else
+ fd_clear_dma_ff();
+ fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length);
+ fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)?
+ DMA_MODE_READ : DMA_MODE_WRITE);
+ fd_set_dma_addr(raw_cmd->kernel_data);
+ fd_set_dma_count(raw_cmd->length);
+ virtual_dma_port = FDCS->address;
+ fd_enable_dma();
+ release_dma_lock(f);
+#endif
+ floppy_disable_hlt();
+}
+
+static void show_floppy(void);
+
+/* waits until the fdc becomes ready */
+
+#ifdef PC9800_DEBUG_FLOPPY
+#define READY_DELAY 10000000
+#else
+#define READY_DELAY 100000
+#endif
+
+static int wait_til_ready(void)
+{
+ int counter, status;
+ if (FDCS->reset)
+ return -1;
+ for (counter = 0; counter < READY_DELAY; counter++) {
+ status = fd_inb(FD98_STATUS);
+ if (status & STATUS_READY)
+ return status;
+ }
+ if (!initialising) {
+ DPRINT("Getstatus times out (%x) on fdc %d\n",
+ status, fdc);
+ show_floppy();
+ }
+ FDCS->reset = 1;
+ return -1;
+}
+
+/* sends a command byte to the fdc */
+static int output_byte(char byte)
+{
+ int status;
+
+ if ((status = wait_til_ready()) < 0)
+ return -1;
+ if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){
+ fd_outb(byte,FD98_DATA);
+#ifdef FLOPPY_SANITY_CHECK
+ output_log[output_log_pos].data = byte;
+ output_log[output_log_pos].status = status;
+ output_log[output_log_pos].jiffies = jiffies;
+ output_log_pos = (output_log_pos + 1) % OLOGSIZE;
+#endif
+ return 0;
+ }
+ FDCS->reset = 1;
+ if (!initialising) {
+ DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
+ byte, fdc, status);
+ show_floppy();
+ }
+ return -1;
+}
+#define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;}
+
+/* gets the response from the fdc */
+static int result(void)
+{
+ int i, status=0;
+
+ for(i=0; i < MAX_REPLIES; i++) {
+ if ((status = wait_til_ready()) < 0)
+ break;
+ status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA;
+ if ((status & ~STATUS_BUSY) == STATUS_READY){
+#ifdef FLOPPY_SANITY_CHECK
+ resultjiffies = jiffies;
+ resultsize = i;
+#endif
+ return i;
+ }
+ if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY))
+ reply_buffer[i] = fd_inb(FD98_DATA);
+ else
+ break;
+ }
+ if (!initialising) {
+ DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n",
+ fdc, status, i);
+ show_floppy();
+ }
+ FDCS->reset = 1;
+ return -1;
+}
+
+static int fifo_depth = 0xa;
+static int no_fifo;
+
+#define NOMINAL_DTR 500
+
+/* Issue a "SPECIFY" command to set the step rate time, head unload time,
+ * head load time, and DMA disable flag to values needed by floppy.
+ *
+ * The value "dtr" is the data transfer rate in Kbps. It is needed
+ * to account for the data rate-based scaling done by the 82072 and 82077
+ * FDC types. This parameter is ignored for other types of FDCs (i.e.
+ * 8272a).
+ *
+ * Note that changing the data transfer rate has a (probably deleterious)
+ * effect on the parameters subject to scaling for 82072/82077 FDCs, so
+ * fdc_specify is called again after each data transfer rate
+ * change.
+ *
+ * srt: 1000 to 16000 in microseconds
+ * hut: 16 to 240 milliseconds
+ * hlt: 2 to 254 milliseconds
+ *
+ * These values are rounded up to the next highest available delay time.
+ */
+static void fdc_specify(void)
+{
+ output_byte(FD_SPECIFY);
+ output_byte(FDCS->spec1 = 0xdf);
+ output_byte(FDCS->spec2 = 0x24);
+}
+
+static void tell_sector(void)
+{
+ printk(": track %d, head %d, sector %d, size %d",
+ R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
+} /* tell_sector */
+
+static int auto_detect_mode_pc9800(void)
+{
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("auto_detect_mode_pc9800: retry_auto_detect=%d\n",
+ retry_auto_detect);
+#endif
+ if (retry_auto_detect > 4) {
+ retry_auto_detect = 0;
+ return 1;
+ }
+
+ switch ((int)(_floppy - floppy_type)) {
+ case 2:
+ _floppy = floppy_type + 4;
+ break;
+
+ case 4:
+ case 6:
+ _floppy = floppy_type + 7;
+ break;
+
+ case 7:
+ case 10:
+ _floppy = floppy_type + 2;
+ break;
+
+ default:
+ _floppy = floppy_type + 7;
+ }
+
+ retry_auto_detect++;
+ return 0;
+}
+
+static void access_mode_change_pc9800(void);
+
+/*
+ * OK, this error interpreting routine is called after a
+ * DMA read/write has succeeded
+ * or failed, so we check the results, and copy any buffers.
+ * hhb: Added better error reporting.
+ * ak: Made this into a separate routine.
+ */
+static int interpret_errors(void)
+{
+ char bad;
+
+ if (inr!=7) {
+ DPRINT("-- FDC reply error");
+ FDCS->reset = 1;
+ return 1;
+ }
+
+ /* check IC to find cause of interrupt */
+ switch (ST0 & ST0_INTR) {
+ case 0x40: /* error occurred during command execution */
+ if (ST1 & ST1_EOC)
+ return 0; /* occurs with pseudo-DMA */
+ bad = 1;
+ if (ST1 & ST1_WP) {
+ DPRINT("Drive is write protected\n");
+ CLEARF(FD_DISK_WRITABLE);
+ cont->done(0);
+ bad = 2;
+ } else if (ST1 & ST1_ND) {
+ SETF(FD_NEED_TWADDLE);
+ } else if (ST1 & ST1_OR) {
+ if (DP->flags & FTD_MSG)
+ DPRINT("Over/Underrun - retrying\n");
+ bad = 0;
+ }else if (*errors >= DP->max_errors.reporting){
+ if (ST0 & ST0_ECE) {
+ printk("Recalibrate failed!");
+ } else if (ST2 & ST2_CRC) {
+ printk("data CRC error");
+ tell_sector();
+ } else if (ST1 & ST1_CRC) {
+ printk("CRC error");
+ tell_sector();
+ } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) {
+ if (auto_detect_mode) {
+ bad = (char)auto_detect_mode_pc9800();
+ access_mode_change_pc9800();
+ }
+
+ if (bad) {
+ printk("floppy error: MA: _floppy - floppy_type=%d\n", (int)(_floppy - floppy_type));
+ printk("bad=%d\n", (int)bad);
+ if (!probing) {
+ printk("sector not found");
+ tell_sector();
+ } else
+ printk("probe failed...");
+ }
+ } else if (ST2 & ST2_WC) { /* seek error */
+ printk("wrong cylinder");
+ } else if (ST2 & ST2_BC) { /* cylinder marked as bad */
+ printk("bad cylinder");
+ } else {
+ printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2);
+ tell_sector();
+ }
+ printk("\n");
+
+ }
+ if (ST2 & ST2_WC || ST2 & ST2_BC)
+ /* wrong cylinder => recal */
+ DRS->track = NEED_2_RECAL;
+ return bad;
+ case 0x80: /* invalid command given */
+ DPRINT("Invalid FDC command given!\n");
+ cont->done(0);
+ return 2;
+ case 0xc0:
+ SETF(FD_DISK_CHANGED);
+ SETF(FD_DISK_WRITABLE);
+ DPRINT("Abnormal termination caused by polling\n");
+ cont->error();
+ return 2;
+ default: /* (0) Normal command termination */
+ auto_detect_mode = 0;
+ return 0;
+ }
+}
+
+/*
+ * This routine is called when everything should be correctly set up
+ * for the transfer (i.e. floppy motor is on, the correct floppy is
+ * selected, and the head is sitting on the right track).
+ */
+static void setup_rw_floppy(void)
+{
+ int i,r, flags,dflags;
+ unsigned long ready_date;
+ timeout_fn function;
+
+ access_mode_change_pc9800();
+ flags = raw_cmd->flags;
+ if (flags & (FD_RAW_READ | FD_RAW_WRITE))
+ flags |= FD_RAW_INTR;
+
+ if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){
+ ready_date = DRS->spinup_date + DP->spinup;
+ /* If spinup will take a long time, rerun scandrives
+ * again just before spinup completion. Beware that
+ * after scandrives, we must again wait for selection.
+ */
+ if ((signed) (ready_date - jiffies) > DP->select_delay){
+ ready_date -= DP->select_delay;
+ function = (timeout_fn) floppy_start;
+ } else
+ function = (timeout_fn) setup_rw_floppy;
+
+ /* wait until the floppy is spinning fast enough */
+ if (fd_wait_for_completion(ready_date,function))
+ return;
+ }
+ dflags = DRS->flags;
+
+ if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
+ setup_DMA();
+
+ if (flags & FD_RAW_INTR)
+ do_floppy = main_command_interrupt;
+
+ r=0;
+ for (i=0; i< raw_cmd->cmd_count; i++)
+ r|=output_byte(raw_cmd->cmd[i]);
+
+#ifdef DEBUGT
+ debugt("rw_command: ");
+#endif
+ if (r){
+ cont->error();
+ reset_fdc();
+ return;
+ }
+
+ if (!(flags & FD_RAW_INTR)){
+ inr = result();
+ cont->interrupt();
+ } else if (flags & FD_RAW_NEED_DISK)
+ fd_watchdog();
+}
+
+static int blind_seek;
+
+/*
+ * This is the routine called after every seek (or recalibrate) interrupt
+ * from the floppy controller.
+ */
+static void seek_interrupt(void)
+{
+#ifdef DEBUGT
+ debugt("seek interrupt:");
+#endif
+ if (inr != 2 || (ST0 & 0xF8) != 0x20) {
+ DRS->track = NEED_2_RECAL;
+ cont->error();
+ cont->redo();
+ return;
+ }
+ if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("clearing NEWCHANGE flag because of effective seek\n");
+ DPRINT("jiffies=%lu\n", jiffies);
+ }
+#endif
+ CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
+ CLEARF(FD_DISK_CHANGED); /* effective seek */
+ DRS->select_date = jiffies;
+ }
+ DRS->track = ST1;
+ floppy_ready();
+}
+
+static void check_wp(void)
+{
+ if (TESTF(FD_VERIFY)) {
+ /* check write protection */
+ output_byte(FD_GETSTATUS);
+ output_byte(UNIT(current_drive));
+ if (result() != 1){
+ FDCS->reset = 1;
+ return;
+ }
+ CLEARF(FD_VERIFY);
+ CLEARF(FD_NEED_TWADDLE);
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("checking whether disk is write protected\n");
+ DPRINT("wp=%x\n",ST3 & 0x40);
+ }
+#endif
+ if (!(ST3 & 0x40))
+ SETF(FD_DISK_WRITABLE);
+ else
+ CLEARF(FD_DISK_WRITABLE);
+ }
+}
+
+static void seek_floppy(void)
+{
+ int track;
+
+ blind_seek=0;
+
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("calling disk change from seek\n");
+ }
+#endif
+
+ if (!TESTF(FD_DISK_NEWCHANGE) &&
+ disk_change(current_drive) &&
+ (raw_cmd->flags & FD_RAW_NEED_DISK)){
+ /* the media changed flag should be cleared after the seek.
+ * If it isn't, this means that there is really no disk in
+ * the drive.
+ */
+ SETF(FD_DISK_CHANGED);
+ cont->done(0);
+ cont->redo();
+ return;
+ }
+ if (DRS->track <= NEED_1_RECAL){
+ recalibrate_floppy();
+ return;
+ } else if (TESTF(FD_DISK_NEWCHANGE) &&
+ (raw_cmd->flags & FD_RAW_NEED_DISK) &&
+ (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
+ /* we seek to clear the media-changed condition. Does anybody
+ * know a more elegant way, which works on all drives? */
+ if (raw_cmd->track)
+ track = raw_cmd->track - 1;
+ else {
+ if (DP->flags & FD_SILENT_DCL_CLEAR){
+ blind_seek = 1;
+ raw_cmd->flags |= FD_RAW_NEED_SEEK;
+ }
+ track = 1;
+ }
+ } else {
+ check_wp();
+ if (raw_cmd->track != DRS->track &&
+ (raw_cmd->flags & FD_RAW_NEED_SEEK))
+ track = raw_cmd->track;
+ else {
+ setup_rw_floppy();
+ return;
+ }
+ }
+
+ do_floppy = seek_interrupt;
+ output_byte(FD_SEEK);
+ output_byte(UNIT(current_drive));
+ LAST_OUT(track);
+#ifdef DEBUGT
+ debugt("seek command:");
+#endif
+}
+
+static void recal_interrupt(void)
+{
+#ifdef DEBUGT
+ debugt("recal interrupt:");
+#endif
+ if (inr !=2)
+ FDCS->reset = 1;
+ else if (ST0 & ST0_ECE) {
+ switch(DRS->track){
+ case NEED_1_RECAL:
+#ifdef DEBUGT
+ debugt("recal interrupt need 1 recal:");
+#endif
+ /* after a second recalibrate, we still haven't
+ * reached track 0. Probably no drive. Raise an
+ * error, as failing immediately might upset
+ * computers possessed by the Devil :-) */
+ cont->error();
+ cont->redo();
+ return;
+ case NEED_2_RECAL:
+#ifdef DEBUGT
+ debugt("recal interrupt need 2 recal:");
+#endif
+ /* If we already did a recalibrate,
+ * and we are not at track 0, this
+ * means we have moved. (The only way
+ * not to move at recalibration is to
+ * be already at track 0.) Clear the
+ * new change flag */
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("clearing NEWCHANGE flag because of second recalibrate\n");
+ }
+#endif
+
+ CLEARF(FD_DISK_NEWCHANGE);
+ DRS->select_date = jiffies;
+ /* fall through */
+ default:
+#ifdef DEBUGT
+ debugt("recal interrupt default:");
+#endif
+ /* Recalibrate moves the head by at
+ * most 80 steps. If after one
+ * recalibrate we don't have reached
+ * track 0, this might mean that we
+ * started beyond track 80. Try
+ * again. */
+ DRS->track = NEED_1_RECAL;
+ break;
+ }
+ } else
+ DRS->track = ST1;
+ floppy_ready();
+}
+
+static void print_result(char *message, int inr)
+{
+ int i;
+
+ DPRINT("%s ", message);
+ if (inr >= 0)
+ for (i=0; i<inr; i++)
+ printk("repl[%d]=%x ", i, reply_buffer[i]);
+ printk("\n");
+}
+
+/* interrupt handler. Note that this can be called externally on the Sparc */
+void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+{
+ void (*handler)(void) = do_floppy;
+ int do_print;
+ unsigned long f;
+
+ lasthandler = handler;
+ interruptjiffies = jiffies;
+
+ f=claim_dma_lock();
+ fd_disable_dma();
+ release_dma_lock(f);
+
+ floppy_enable_hlt();
+ do_floppy = NULL;
+ if (fdc >= N_FDC || FDCS->address == -1){
+ /* we don't even know which FDC is the culprit */
+ printk("DOR0=%x\n", fdc_state[0].dor);
+ printk("floppy interrupt on bizarre fdc %d\n",fdc);
+ printk("handler=%p\n", handler);
+ is_alive("bizarre fdc");
+ return;
+ }
+
+ FDCS->reset = 0;
+ /* We have to clear the reset flag here, because apparently on boxes
+ * with level triggered interrupts (PS/2, Sparc, ...), it is needed to
+ * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
+ * emission of the SENSEI's.
+ * It is OK to emit floppy commands because we are in an interrupt
+ * handler here, and thus we have to fear no interference of other
+ * activity.
+ */
+
+ do_print = !handler && !initialising;
+
+ inr = result();
+ if (inr && do_print)
+ print_result("unexpected interrupt", inr);
+ if (inr == 0){
+ do {
+ output_byte(FD_SENSEI);
+ inr = result();
+ if ((ST0 & ST0_INTR) == 0xC0) {
+ int drive = ST0 & ST0_DS;
+
+ /* Attention Interrupt. */
+ if (ST0 & ST0_NR) {
+#ifdef PC9800_DEBUG_FLOPPY
+ if (do_print)
+ printk(KERN_DEBUG
+ "floppy debug: floppy ejected (drive %d)\n",
+ drive);
+#endif
+ USETF(FD_DISK_CHANGED);
+ USETF(FD_VERIFY);
+ } else {
+#ifdef PC9800_DEBUG_FLOPPY
+ if (do_print)
+ printk(KERN_DEBUG
+ "floppy debug: floppy inserted (drive %d)\n",
+ drive);
+#endif
+ }
+ } /* Attention Interrupt */
+#ifdef PC9800_DEBUG_FLOPPY
+ else {
+ printk(KERN_DEBUG
+ "floppy debug : unknown interrupt\n");
+ }
+#endif
+ } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2);
+ }
+ if (handler) {
+ schedule_bh( (void *)(void *) handler);
+ } else {
+#if 0
+ FDCS->reset = 1;
+#endif
+ }
+ is_alive("normal interrupt end");
+}
+
+static void recalibrate_floppy(void)
+{
+#ifdef DEBUGT
+ debugt("recalibrate floppy:");
+#endif
+ do_floppy = recal_interrupt;
+ output_byte(FD_RECALIBRATE);
+ LAST_OUT(UNIT(current_drive));
+}
+
+/*
+ * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
+ */
+static void reset_interrupt(void)
+{
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy debug: reset interrupt\n");
+#endif
+#ifdef DEBUGT
+ debugt("reset interrupt:");
+#endif
+ result(); /* get the status ready for set_fdc */
+ if (FDCS->reset) {
+ printk("reset set in interrupt, calling %p\n", cont->error);
+ cont->error(); /* a reset just after a reset. BAD! */
+ }
+ cont->redo();
+}
+
+/*
+ * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
+ * or by setting the self clearing bit 7 of STATUS (newer FDCs)
+ */
+static void reset_fdc(void)
+{
+ unsigned long flags;
+
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy debug: reset_fdc\n");
+#endif
+
+ do_floppy = reset_interrupt;
+ FDCS->reset = 0;
+ reset_fdc_info(0);
+
+ /* Pseudo-DMA may intercept 'reset finished' interrupt. */
+ /* Irrelevant for systems with true DMA (i386). */
+
+ flags=claim_dma_lock();
+ fd_disable_dma();
+ release_dma_lock(flags);
+
+ fd_outb(FDCS->dor | 0x80, FD_MODE);
+ udelay(FD_RESET_DELAY);
+ fd_outb(FDCS->dor, FD_MODE);
+ udelay(FD_AFTER_RESET_DELAY);
+}
+
+static void show_floppy(void)
+{
+ int i;
+
+ printk("\n");
+ printk("floppy driver state\n");
+ printk("-------------------\n");
+ printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n",
+ jiffies, interruptjiffies, jiffies-interruptjiffies, lasthandler);
+
+
+#ifdef FLOPPY_SANITY_CHECK
+ printk("timeout_message=%s\n", timeout_message);
+ printk("last output bytes:\n");
+ for (i=0; i < OLOGSIZE; i++)
+ printk("%2x %2x %lu\n",
+ output_log[(i+output_log_pos) % OLOGSIZE].data,
+ output_log[(i+output_log_pos) % OLOGSIZE].status,
+ output_log[(i+output_log_pos) % OLOGSIZE].jiffies);
+ printk("last result at %lu\n", resultjiffies);
+ printk("last redo_fd_request at %lu\n", lastredo);
+ for (i=0; i<resultsize; i++){
+ printk("%2x ", reply_buffer[i]);
+ }
+ printk("\n");
+#endif
+
+ printk("status=%x\n", fd_inb(FD98_STATUS));
+ printk("fdc_busy=%lu\n", fdc_busy);
+ if (do_floppy)
+ printk("do_floppy=%p\n", do_floppy);
+ if (floppy_work.pending)
+ printk("floppy_work.func=%p\n", floppy_work.func);
+ if (timer_pending(&fd_timer))
+ printk("fd_timer.function=%p\n", fd_timer.function);
+ if (timer_pending(&fd_timeout)){
+ printk("timer_function=%p\n",fd_timeout.function);
+ printk("expires=%lu\n",fd_timeout.expires-jiffies);
+ printk("now=%lu\n",jiffies);
+ }
+ printk("cont=%p\n", cont);
+ printk("current_req=%p\n", current_req);
+ printk("command_status=%d\n", command_status);
+ printk("\n");
+}
+
+static void floppy_shutdown(unsigned long data)
+{
+ unsigned long flags;
+
+ if (!initialising)
+ show_floppy();
+ cancel_activity();
+
+ floppy_enable_hlt();
+
+ flags=claim_dma_lock();
+ fd_disable_dma();
+ release_dma_lock(flags);
+
+ /* avoid dma going to a random drive after shutdown */
+
+ if (!initialising)
+ DPRINT("floppy timeout called\n");
+ FDCS->reset = 1;
+ if (cont){
+ cont->done(0);
+ cont->redo(); /* this will recall reset when needed */
+ } else {
+ printk("no cont in shutdown!\n");
+ process_fd_request();
+ }
+ is_alive("floppy shutdown");
+}
+/*typedef void (*timeout_fn)(unsigned long);*/
+
+static void access_mode_change_pc9800(void)
+{
+ static int access_mode, mode_change_now, old_mode, new_set = 1;
+#ifdef PC9800_DEBUG_FLOPPY2
+ printk("enter access_mode_change\n");
+#endif
+ access_mode = mode_change_now = 0;
+ if (DP->cmos==4) {
+ switch ((int)(_floppy - &floppy_type[0])) {
+ case 1:
+ case 2:
+ new_set = 1;
+ access_mode = 2;
+ break;
+
+ case 4:
+ case 6:
+ new_set = 1;
+ access_mode = 3;
+ break;
+
+ case 7:
+ case 10:
+ new_set = 1;
+ access_mode = 1;
+ break;
+
+ default:
+ access_mode = 1;
+ break;
+ }
+
+ old_mode = fd_inb(FD_MODE_CHANGE) & 3;
+
+ switch (access_mode) {
+ case 1:
+ if ((old_mode & 2) == 0) {
+ fd_outb(old_mode | 2, FD_MODE_CHANGE);
+ mode_change_now = 1;
+ } else {
+ fd_outb(current_drive << 5, FD_EMODE_CHANGE);
+ if (fd_inb(FD_EMODE_CHANGE) == 0xff)
+ return;
+ }
+
+ fd_outb((current_drive << 5) | 0x11, FD_EMODE_CHANGE);
+ mode_change_now = 1;
+ break;
+
+ case 2:
+ if ((old_mode & 2) == 0) {
+ fd_outb(old_mode | 2, FD_MODE_CHANGE);
+ mode_change_now = 1;
+ } else {
+ fd_outb(current_drive << 5, FD_EMODE_CHANGE);
+ if ((fd_inb(FD_EMODE_CHANGE) & 1) == 0)
+ return;
+ fd_outb((current_drive << 5) | 0x10, FD_EMODE_CHANGE);
+ mode_change_now = 1;
+ }
+
+ break;
+
+ case 3:
+ if ((old_mode & 2) == 0)
+ return;
+ fd_outb(current_drive << 5, FD_EMODE_CHANGE);
+ if (fd_inb(FD_EMODE_CHANGE) & 1)
+ fd_outb((current_drive << 5) | 0x10, FD_EMODE_CHANGE);
+ fd_outb(old_mode & 0xfd, FD_MODE_CHANGE);
+ mode_change_now = 1;
+ break;
+
+ default:
+ break;
+ }
+ } else {
+ switch ((int)(_floppy - &floppy_type[0])) {
+ case 1:
+ case 2:
+ new_set = 1;
+ access_mode = 2;
+ break;
+
+ case 4:
+ case 6:
+ new_set = 1;
+ access_mode = 3;
+ break;
+
+ default:
+ switch (DP->cmos) {
+ case 2:
+ access_mode = 2;
+ break;
+
+ case 3:
+ access_mode = 3;
+ break;
+
+ default:
+ break;
+ }
+
+ break;
+ }
+
+ old_mode = fd_inb(FD_MODE_CHANGE) & 3;
+
+ switch (access_mode) {
+ case 2:
+ if ((old_mode & 2) == 0) {
+ fd_outb(old_mode | 2, FD_MODE_CHANGE);
+ mode_change_now = 1;
+ }
+
+ break;
+
+ case 3:
+ if (old_mode & 2) {
+ fd_outb(old_mode & 0xfd, FD_MODE_CHANGE);
+ mode_change_now = 1;
+ }
+
+ break;
+
+ default:
+ break;
+ }
+ }
+#ifdef PC9800_DEBUG_FLOPPY2
+ printk("floppy debug: DP->cmos=%d\n", DP->cmos);
+ printk("floppy debug: mode_change_now=%d\n", mode_change_now);
+ printk("floppy debug: access_mode=%d\n", access_mode);
+ printk("floppy debug: old_mode=%d\n", old_mode);
+ printk("floppy debug: _floppy - &floppy_type[0]=%d\n", (int)(_floppy - &floppy_type[0]));
+#endif /* PC9800_DEBUG_FLOPPY2 */
+ if(mode_change_now)
+ reset_fdc();
+}
+
+/* start motor, check media-changed condition and write protection */
+static int start_motor(void (*function)(void) )
+{
+ access_mode_change_pc9800();
+ set_mode(~0, 0x8);
+
+ /* wait_for_completion also schedules reset if needed. */
+ return(fd_wait_for_completion(DRS->select_date+DP->select_delay,
+ (timeout_fn) function));
+}
+
+static void floppy_ready(void)
+{
+ CHECK_RESET;
+ if (start_motor(floppy_ready)) return;
+
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("calling disk change from floppy_ready\n");
+ }
+#endif
+ if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
+ disk_change(current_drive) &&
+ !DP->select_delay)
+ twaddle(); /* this clears the dcl on certain drive/controller
+ * combinations */
+
+#ifdef fd_chose_dma_mode
+ if ((raw_cmd->flags & FD_RAW_READ) ||
+ (raw_cmd->flags & FD_RAW_WRITE))
+ {
+ unsigned long flags = claim_dma_lock();
+ fd_chose_dma_mode(raw_cmd->kernel_data,
+ raw_cmd->length);
+ release_dma_lock(flags);
+ }
+#endif
+
+#if 0
+ access_mode_change_pc9800();
+#endif
+ if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){
+ fdc_specify(); /* must be done here because of hut, hlt ... */
+ seek_floppy();
+ } else {
+ if ((raw_cmd->flags & FD_RAW_READ) ||
+ (raw_cmd->flags & FD_RAW_WRITE))
+ fdc_specify();
+ setup_rw_floppy();
+ }
+}
+
+static void floppy_start(void)
+{
+ reschedule_timeout(current_reqD, "floppy start", 0);
+
+ scandrives();
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("setting NEWCHANGE in floppy_start\n");
+ }
+#endif
+ SETF(FD_DISK_NEWCHANGE);
+ floppy_ready();
+}
+
+/*
+ * ========================================================================
+ * here ends the bottom half. Exported routines are:
+ * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
+ * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
+ * Initialization also uses output_byte, result, set_dor, floppy_interrupt
+ * and set_dor.
+ * ========================================================================
+ */
+/*
+ * General purpose continuations.
+ * ==============================
+ */
+
+static void do_wakeup(void)
+{
+ reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
+ cont = 0;
+ command_status += 2;
+ wake_up(&command_done);
+}
+
+static struct cont_t wakeup_cont={
+ empty,
+ do_wakeup,
+ empty,
+ (done_f)empty
+};
+
+
+static struct cont_t intr_cont={
+ empty,
+ process_fd_request,
+ empty,
+ (done_f) empty
+};
+
+static int wait_til_done(void (*handler)(void), int interruptible)
+{
+ int ret;
+
+ schedule_bh((void *)(void *)handler);
+
+ if (command_status < 2 && NO_SIGNAL) {
+ DECLARE_WAITQUEUE(wait, current);
+
+ add_wait_queue(&command_done, &wait);
+ for (;;) {
+ set_current_state(interruptible?
+ TASK_INTERRUPTIBLE:
+ TASK_UNINTERRUPTIBLE);
+
+ if (command_status >= 2 || !NO_SIGNAL)
+ break;
+
+ is_alive("wait_til_done");
+
+ schedule();
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&command_done, &wait);
+ }
+
+ if (command_status < 2){
+ cancel_activity();
+ cont = &intr_cont;
+ reset_fdc();
+ return -EINTR;
+ }
+
+#ifdef PC9800_DEBUG_FLOPPY
+ if (command_status != FD_COMMAND_OKAY)
+ printk("floppy check: wait_til_done out:%d\n", command_status);
+#endif
+ if (FDCS->reset)
+ command_status = FD_COMMAND_ERROR;
+ if (command_status == FD_COMMAND_OKAY)
+ ret=0;
+ else
+ ret=-EIO;
+ command_status = FD_COMMAND_NONE;
+ return ret;
+}
+
+static void generic_done(int result)
+{
+ command_status = result;
+ cont = &wakeup_cont;
+}
+
+static void generic_success(void)
+{
+ cont->done(1);
+}
+
+static void generic_failure(void)
+{
+ cont->done(0);
+}
+
+static void success_and_wakeup(void)
+{
+ generic_success();
+ cont->redo();
+}
+
+
+/*
+ * formatting and rw support.
+ * ==========================
+ */
+
+static int next_valid_format(void)
+{
+ int probed_format;
+
+ probed_format = DRS->probed_format;
+ while(1){
+ if (probed_format >= 8 ||
+ !DP->autodetect[probed_format]){
+ DRS->probed_format = 0;
+ return 1;
+ }
+ if (floppy_type[DP->autodetect[probed_format]].sect){
+ DRS->probed_format = probed_format;
+ return 0;
+ }
+ probed_format++;
+ }
+}
+
+static void bad_flp_intr(void)
+{
+ if (probing){
+ DRS->probed_format++;
+ if (!next_valid_format())
+ return;
+ }
+ (*errors)++;
+ INFBOUND(DRWE->badness, *errors);
+ if (*errors > DP->max_errors.abort)
+ cont->done(0);
+ if (*errors > DP->max_errors.reset)
+ FDCS->reset = 1;
+ else if (*errors > DP->max_errors.recal)
+ DRS->track = NEED_2_RECAL;
+}
+
+static void set_floppy(int drive)
+{
+ int type = ITYPE(UDRS->fd_device);
+ if (type) {
+ auto_detect_mode = 0;
+ _floppy = floppy_type + type;
+ } else if (auto_detect_mode == 0) {
+ auto_detect_mode = 1;
+ retry_auto_detect = 0;
+ _floppy = current_type[drive];
+ }
+#ifdef PC9800_DEBUG_FLOPPY2
+ printk("set_floppy: set floppy type=%d\n", (int)(_floppy - floppy_type));
+#endif
+}
+
+/*
+ * formatting support.
+ * ===================
+ */
+static void format_interrupt(void)
+{
+ switch (interpret_errors()){
+ case 1:
+ cont->error();
+ case 2:
+ break;
+ case 0:
+ cont->done(1);
+ }
+ cont->redo();
+}
+
+#define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
+#define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1))
+#define CT(x) ((x) | 0xc0)
+static void setup_format_params(int track)
+{
+ struct fparm {
+ unsigned char track,head,sect,size;
+ } *here = (struct fparm *)floppy_track_buffer;
+ int il,n;
+ int count,head_shift,track_shift;
+
+ raw_cmd = &default_raw_cmd;
+ raw_cmd->track = track;
+
+ raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
+ FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK;
+ raw_cmd->rate = _floppy->rate & 0x43;
+ raw_cmd->cmd_count = NR_F;
+ COMMAND = FM_MODE(_floppy,FD_FORMAT);
+ DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head);
+ F_SIZECODE = FD_SIZECODE(_floppy);
+ F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
+ F_GAP = _floppy->fmt_gap;
+ F_FILL = FD_FILL_BYTE;
+
+ raw_cmd->kernel_data = floppy_track_buffer;
+ raw_cmd->length = 4 * F_SECT_PER_TRACK;
+
+ /* allow for about 30ms for data transport per track */
+ head_shift = (F_SECT_PER_TRACK + 5) / 6;
+
+ /* a ``cylinder'' is two tracks plus a little stepping time */
+ track_shift = 2 * head_shift + 3;
+
+ /* position of logical sector 1 on this track */
+ n = (track_shift * format_req.track + head_shift * format_req.head)
+ % F_SECT_PER_TRACK;
+
+ /* determine interleave */
+ il = 1;
+ if (_floppy->fmt_gap < 0x22)
+ il++;
+
+ /* initialize field */
+ for (count = 0; count < F_SECT_PER_TRACK; ++count) {
+ here[count].track = format_req.track;
+ here[count].head = format_req.head;
+ here[count].sect = 0;
+ here[count].size = F_SIZECODE;
+ }
+ /* place logical sectors */
+ for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
+ here[n].sect = count;
+ n = (n+il) % F_SECT_PER_TRACK;
+ if (here[n].sect) { /* sector busy, find next free sector */
+ ++n;
+ if (n>= F_SECT_PER_TRACK) {
+ n-=F_SECT_PER_TRACK;
+ while (here[n].sect) ++n;
+ }
+ }
+ }
+}
+
+static void redo_format(void)
+{
+ buffer_track = -1;
+ setup_format_params(format_req.track << STRETCH(_floppy));
+ floppy_start();
+#ifdef DEBUGT
+ debugt("queue format request");
+#endif
+}
+
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